10-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

______________________________________________________________________

FORM 10-K

x ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the fiscal year ended December 31, 2018

OR

o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from                to                

Commission File Number: 1-13199 (SL Green Realty Corp.)

Commission File Number: 33-167793-02 (SL Green Operating Partnership, L.P.)

______________________________________________________________________

SL GREEN REALTY CORP.

SL GREEN OPERATING PARTNERSHIP, L.P.

(Exact name of registrant as specified in its charter)

______________________________________________________________________

SL Green Realty Corp.	Maryland	13-3956755
SL Green Operating Partnership, L.P.	Delaware	13-3960938
	(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)

420 Lexington Avenue, New York, NY 10170

(Address of principal executive offices—Zip Code)

(212) 594-2700

(Registrant's telephone number, including area code)

______________________________________________________________________

SECURITIES REGISTERED PURSUANT TO SECTION 12(B) OF THE ACT:

Registrant	Title of Each Class	Name of Each Exchange on Which Registered
SL Green Realty Corp.	Common Stock, $0.01 par value	New York Stock Exchange
SL Green Realty Corp.	6.500% Series I Cumulative Redeemable Preferred Stock, $0.01 par value, $25.00 mandatory liquidation preference	New York Stock Exchange

SECURITIES REGISTERED PURSUANT TO SECTION 12(G) OF THE ACT:None

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. 

SL Green Realty Corp.    Yes x    No oSL Green Operating Partnership, L.P.    Yes o    No x

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act. 

SL Green Realty Corp.    Yes o    No xSL Green Operating Partnership, L.P.    Yes o    No x

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. 

SL Green Realty Corp.    Yes x    No oSL Green Operating Partnership, L.P.    Yes x    No o

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). 

SL Green Realty Corp.     Yes x    No oSL Green Operating Partnership, L.P.    Yes x    No o

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K is not contained herein, and will not be contained, to the best of the registrant's knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K. 

SL Green Realty Corp.    oSL Green Operating Partnership, L.P.    o

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of "large accelerated filer," "accelerated filer," "smaller reporting company," and "emerging growth company" in Rule 12b-2 of the Exchange Act.

SL Green Realty Corp.

Large accelerated filer	x	Accelerated filer	o
Non-accelerated filer	o
Smaller Reporting Company	o	Emerging Growth Company	o
If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.			o

SL Green Operating Partnership, L.P.

Large accelerated filer	o	Accelerated filer	o
Non-accelerated filer	x
Smaller Reporting Company	o	Emerging Growth Company	o
If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.			o

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Act). 

SL Green Realty Corp.    Yes o    No xSL Green Operating Partnership, L.P.    Yes o    No x

The aggregate market value of the common stock held by non-affiliates of SL Green Realty Corp. (79,576,758 shares) was $8.0 billion based on the quoted closing price on the New York Stock Exchange for such shares on June 30, 2018.

As of February 25, 2019, 84,325,436 shares of SL Green Realty Corp.'s common stock, par value $0.01 per share, were outstanding. As of February 25, 2019, 1,022,921 common units of limited partnership interest of SL Green Operating Partnership, L.P. were held by non-affiliates. There is no established trading market for such units.

DOCUMENTS INCORPORATED BY REFERENCE

Portions of the SL Green Realty Corp.'s Proxy Statement for its 2019 Annual Stockholders' Meeting to be filed within 120 days after the end of the Registrant's fiscal year are incorporated by reference into Part III of this Annual Report on Form 10-K.

EXPLANATORY NOTE

This report combines the annual reports on Form 10-K for the year ended December 31, 2018 of SL Green Realty Corp. and SL Green Operating Partnership, L.P. Unless stated otherwise or the context otherwise requires, references to "SL Green Realty Corp.," the "Company" or "SL Green" mean SL Green Realty Corp. and its consolidated subsidiaries; and references to "SL Green Operating Partnership, L.P.," the "Operating Partnership" or "SLGOP" mean SL Green Operating Partnership, L.P. and its consolidated subsidiaries. The terms "we," "our" and "us" mean the Company and all the entities owned or controlled by the Company, including the Operating Partnership.

The Company is a Maryland corporation which operates as a self-administered and self-managed real estate investment trust, or REIT, and is the sole managing general partner of the Operating Partnership. As a general partner of the Operating Partnership, the Company has full, exclusive and complete responsibility and discretion in the day-to-day management and control of the Operating Partnership.

As of December 31, 2018, the Company owns 95.30% of the outstanding general and limited partnership interest in the Operating Partnership. The Company also owns 9,200,000 Series I Preferred Units of the Operating Partnership. As of December 31, 2018, noncontrolling investors held, in aggregate, a 4.70% limited partnership interest in the Operating Partnership. We refer to these interests as the noncontrolling interests in the Operating Partnership.

The Company and the Operating Partnership are managed and operated as one entity. The financial results of the Operating Partnership are consolidated into the financial statements of the Company. The Company has no significant assets other than its investment in the Operating Partnership. Substantially all of our assets are held by, and our operations are conducted through, the Operating Partnership. Therefore, the assets and liabilities of the Company and the Operating Partnership are substantially the same.

Noncontrolling interests in the Operating Partnership, stockholders' equity of the Company and partners' capital of the Operating Partnership are the main areas of difference between the consolidated financial statements of the Company and those of the Operating Partnership. The common limited partnership interests in the Operating Partnership not owned by the Company are accounted as noncontrolling interests, within mezzanine equity, in the Company's and the Operating Partnership's consolidated financial statements.

We believe combining the annual reports on Form 10-K of the Company and the Operating Partnership into this single report results in the following benefits:

• Combined reports enhance investors' understanding of the Company and the Operating Partnership by enabling investors to view the business as a whole in the same manner as management views and operates the business;

• Combined reports eliminate duplicative disclosure and provides a more streamlined and readable presentation since a substantial portion of the Company's disclosure applies to both the Company and the Operating Partnership; and

• Combined reports create time and cost efficiencies through the preparation of one combined report instead of two separate reports.

To help investors understand the significant differences between the Company and the Operating Partnership, this report presents the following separate sections for each of the Company and the Operating Partnership:

• consolidated financial statements;

• the following notes to the consolidated financial statements:

◦ Note 11, Noncontrolling Interests on the Company’s Consolidated Financial Statements;

◦ Note 12, Stockholders' Equity of the Company;

◦ Note 13, Partners' Capital of the Operating Partnership;

◦ Note 22, Quarterly Financial Data of the Company (unaudited); and

◦ Note 23, Quarterly Financial Data of the Operating Partnership (unaudited).

This report also includes separate Part II, Item 5. Market for Registrants' Common Equity and Related Stockholder Matters and Issuer Purchases of Equity Securities, Item 6. Selected Financial Data and Item 9A. Controls and Procedures sections and separate Exhibit 31 and 32 certifications for each of the Company and the Operating Partnership, respectively, in order to establish that the Chief Executive Officer and the Chief Financial Officer of the Company, in both their capacity as the principal executive officer and principal financial officer of the Company and the principal executive officer and principal financial officer of the general partner of the Operating Partnership, have made the requisite certifications and that the Company and the Operating Partnership are compliant with Rule 13a-15 and Rule 15d-15 of the Securities Exchange Act of 1934, as amended, or the Exchange Act.

SL GREEN REALTY CORP. AND SL GREEN OPERATING PARTNERSHIP, L.P.

TABLE OF CONTENTS

PART I
Item 1.	Business	4
Item 1A.	Risk Factors	12
Item 1B.	Unresolved Staff Comments	23
Item 2.	Properties	24
Item 3.	Legal Proceedings	32
Item 4.	Mine Safety Disclosures	32
PART II
Item 5.	Market for Registrant's Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities	33
Item 6.	Selected Financial Data - SL Green Realty Corp.	35
	Selected Financial Data - SL Green Operating Partnership, L.P.
Item 7.	Management's Discussion and Analysis of Financial Condition and Results of Operations	39
Item 7A.	Quantitative and Qualitative Disclosures about Market Risk	65
Item 8.	Financial Statements and Supplementary Data	67
Item 9.	Changes in and Disagreements with Accountants on Accounting and Financial Disclosure	138
Item 9A.	Controls and Procedures	138
Item 9B.	Other Information	142
PART III
Item 10.	Directors, Executive Officers and Corporate Governance	143
Item 11.	Executive Compensation	143
Item 12.	Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters	143
Item 13.	Certain Relationships and Related Transactions, and Director Independence	143
Item 14.	Principal Accounting Fees and Services	143
PART IV
Item 15.	Exhibits, Financial Statements and Schedules	144
	SIGNATURES	150

PART I

ITEM 1. BUSINESS

General

SL Green Realty Corp. is a self-managed real estate investment trust, or REIT, engaged in the acquisition, development, ownership, management and operation of commercial and residential real estate properties, principally office properties, located in the New York metropolitan area. We were formed in June, 1997 for the purpose of continuing the commercial real estate business of S.L. Green Properties, Inc., our predecessor entity. S.L. Green Properties, Inc., which was founded in 1980 by Stephen L. Green, who serves as a member and the chairman emeritus of the Company's board of directors, had been engaged in the business of owning, managing, leasing, and repositioning office properties in Manhattan, a borough of New York City. Reckson Associates Realty Corp., or Reckson, and Reckson Operating Partnership, L.P., or ROP, are wholly-owned subsidiaries of SL Green Realty Corp.

As of December 31, 2018, we owned the following interests in properties in the New York metropolitan area, primarily in midtown Manhattan. Our investments located outside of Manhattan are referred to as the Suburban properties:

		Consolidated			Unconsolidated		Total
Location	Property Type	Number of Properties		Approximate Square Feet	Number of Properties	Approximate Square Feet	Number of Properties	Approximate Square Feet	Weighted Average Occupancy(1)
Commercial:
Manhattan	Office	20		12,387,091	10	11,329,183	30	23,716,274	94.5	%
	Retail	7	(2)	325,648	9	352,174	16	677,822	96.7	%
	Development/Redevelopment	5		486,101	2	347,000	7	833,101	54.1	%
	Fee Interest	—		—	1	—	1	—	—	%
		32		13,198,840	22	12,028,357	54	25,227,197	93.2	%
Suburban	Office	13		2,295,200	—	—	13	2,295,200	91.3	%
	Retail	1		52,000	—	—	1	52,000	100.0	%
	Development/Redevelopment	1		1,000	—	—	1	1,000	—	%
		15		2,348,200	—	—	15	2,348,200	91.4	%
Total commercial properties		47		15,547,040	22	12,028,357	69	27,575,397	93.1	%
Residential:
Manhattan	Residential	2	(2)	445,105	10	2,156,751	12	2,601,856	91.5	%
Suburban	Residential	—		—	—	—	—	—	—	%
Total residential properties		2		445,105	10	2,156,751	12	2,601,856	91.5	%
Total portfolio		49		15,992,145	32	14,185,108	81	30,177,253	92.9	%

(1) The weighted average occupancy for commercial properties represents the total occupied square feet divided by total square footage at acquisition. The weighted average occupancy for residential properties represents the total occupied units divided by total available units.

(2) As of December 31, 2018, we owned a building at 315 West 33rd Street, also known as The Olivia, that was comprised of approximately 270,132 square feet of retail space and approximately 222,855 square feet of residential space. For the purpose of this report, we have included the building in the number of retail properties we own. However, we have included only the retail square footage in the retail approximate square footage, and have listed the balance of the square footage as residential square footage.

As of December 31, 2018, we also managed two office buildings owned by third parties encompassing approximately 2.1 million square feet, and held debt and preferred equity investments with a book value of $2.1 billion, including $0.1 billion of debt and preferred equity investments and other financing receivables that are included in balance sheet line items other than the Debt and Preferred Equity Investments line item.

Our corporate offices are located in midtown Manhattan at 420 Lexington Avenue, New York, New York 10170. As of December 31, 2018, we employed 1,058 employees, 310 of whom were employed in our corporate offices. We can be contacted at (212) 594-2700. We maintain a website at www.slgreen.com. On our website, you can obtain, free of charge, a copy of our annual reports on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K and amendments to those reports filed or furnished pursuant to Section 13(a) or 15(d) of the Exchange Act as soon as reasonably practicable after we file such material electronically with, or furnish it to, the Securities and Exchange Commission, or the SEC. We have also made available on our website our audit committee charter, compensation committee charter, nominating and corporate governance committee charter,

4

code of business conduct and ethics and corporate governance principles. We do not intend for information contained on our website to be part of this annual report on Form 10-K. The SEC maintains a website (http://www.sec.gov) that contains reports, proxy and information statements, and other information regarding issuers that file electronically with the SEC.

Unless the context requires otherwise, all references to the "Company," "SL Green," "we," "our" and "us" in this annual report means SL Green Realty Corp., a Maryland corporation, and one or more of its subsidiaries, including the Operating Partnership, or, as the context may require, SL Green only or the Operating Partnership only, and "S.L. Green Properties" means S.L. Green Properties, Inc., a New York corporation, as well as the affiliated partnerships and other entities through which Stephen L. Green historically conducted commercial real estate activities.

Corporate Structure

In connection with the Company's initial public offering, or IPO, in August 1997, the Operating Partnership received a contribution of interests in real estate properties as well as a 95% economic, non-voting interest in the management, leasing and construction companies affiliated with S.L. Green Properties. We refer to these management, leasing and construction entities, which are owned by S.L. Green Management Corp, as the "Service Corporation." The Company is organized so as to qualify, and has elected to qualify as a REIT, under the Internal Revenue Code of 1986, as amended, or the Code.

Substantially all of our assets are held by, and all of our operations are conducted through, the Operating Partnership. We are the sole managing general partner of the Operating Partnership, and as of December 31, 2018, we owned 95.30% of its economic interests. All of the management and leasing operations with respect to our wholly-owned properties are conducted through SL Green Management LLC, or Management LLC. The Operating Partnership owns a 100% interest in Management LLC.

In order to maintain the Company's qualification as a REIT while realizing income from management, leasing and construction contracts with third parties and joint venture properties, all of these service operations are conducted through the Service Corporation, a consolidated variable interest entity. We, through our Operating Partnership, receive substantially all of the cash flow from the Service Corporation's operations. All of the voting common stock of the Service Corporation is held by an entity owned and controlled by Stephen L. Green, who serves as a member and as the chairman emeritus of the Company's board of directors.

Business and Growth Strategies

SL Green is New York City's largest owner of office real estate and an investment-grade S&P 500 company that is focused primarily on owning, managing and maximizing the value of Manhattan commercial properties.

Our core business is the ownership of high quality commercial properties and our primary business objective is to maximize the total return to stockholders, through growth in net income attributable to common stockholders and funds from operations, or FFO, and through asset value appreciation. The commercial real estate expertise resulting from owning, operating, investing, developing, redeveloping and lending on real estate in Manhattan for over 38 years has enabled us to invest in a collection of premier office and retail properties, selected multifamily residential assets, and high quality debt and preferred equity investments. We also own high quality commercial properties in the New York metropolitan area.

We are led by a strong, experienced management team that provides a foundation of skills in all aspects of real estate, including acquisitions, dispositions, management, leasing, development, redevelopment, and financing. It is with this team that we have achieved a market leading position in our targeted submarkets.

We seek to enhance the value of our company by executing strategies that include the following:

• Leasing and property management, which capitalizes on our extensive presence and knowledge of the marketplaces in which we operate;

• Acquiring office, retail and residential properties and employing our local market skills to reposition these assets to create incremental cash flow and capital appreciation;

• Identifying properties well suited for development/redevelopment and maximizing the value of those properties through redevelopment or reconfiguration to match current workplace, retail and housing trends;

• Investing in debt and preferred equity positions that generate consistently strong risk-adjusted returns, increase the breadth of our market insight, foster key market relationships and source potential future investment opportunities;

• Executing dispositions through sales or joint ventures that harvest embedded equity which has been generated through management's value enhancing activities; and

• Maintaining a prudently levered, liquid balance sheet with consistent access to diversified sources of property level and corporate capital.

5

Leasing and Property Management

We seek to capitalize on our management's extensive knowledge of Manhattan and the New York metropolitan area and the needs of our tenants through proactive leasing and management programs, which include: (i) use of in-depth market experience resulting from managing and leasing tens of millions of square feet of office, retail and residential space since the Company was founded; (ii) careful tenant management, which results in long average lease terms and a manageable lease expiration schedule; (iii) utilization of an extensive network of third-party brokers to supplement our in-house leasing team; (iv) use of comprehensive building management analysis and planning; and (v) a commitment to tenant satisfaction by providing high quality tenant services at competitive rental rates.

Property Acquisitions

We acquire core properties for long-term value appreciation and earnings growth. We also acquire non-core properties that are typically held for shorter periods during which we intend to create significant increases in value. This strategy has resulted in capital gains that increase our investment capital base. In implementing this strategy, we continually evaluate potential acquisition opportunities. These opportunities may come from new properties as well as acquisitions in which we already hold a joint venture interest or, from time to time, from our debt and preferred equity investments.

Through intimate knowledge of our markets we have developed an ability to source transactions with superior risk-adjusted returns by capturing off-market opportunities. In rising markets, we primarily seek to acquire strategic vacancies that provide the opportunity to take advantage of our exceptional leasing and repositioning capabilities to increase cash flow and property value. In stable or falling markets, we primarily target assets featuring credit tenancies with fully escalated in-place rents to provide cash flow stability near-term and the opportunity for increases over time.

Management’s breadth of activities and expertise in New York City has also enabled us to identify and acquire retail properties in prime locations.  Combining our real estate skills and ability to attract premier tenants has resulted in transactions that have provided significant capital appreciation.  This same market penetration has permitted us to grow a portfolio of high quality, well-located multifamily properties

We believe that we have many advantages over our competitors in acquiring core and non-core properties, both directly and through our joint venture program that includes a predominance of high quality institutional investors. Those advantages include: (i) senior management's average 31 years of experience leading a full-service, fully-integrated real estate company focused, primarily, on the Manhattan market; (ii) the ability to offer tax-efficient structures to sellers through the exchange of ownership interests, including units in our Operating Partnership; and (iii) the ability to underwrite and close transactions on an expedited basis even when the transaction requires a complicated structure.

Property Dispositions

We continually evaluate our portfolio to identify those properties that are most likely to meet our long-term earnings and cash flow growth objectives and contribute to increasing portfolio value. Properties that no longer meet our objectives are evaluated for sale, or in certain cases, joint venture to release equity created through management's value enhancement programs or to take advantage of attractive market valuations.

We seek to efficiently deploy the capital proceeds generated from these dispositions into property acquisitions and debt and preferred equity investments that we expect will provide enhanced future capital gains and earnings growth opportunities. Management may also elect to utilize the capital proceeds from these dispositions to repurchase shares of our common stock, repay existing indebtedness of the Company or its subsidiaries, or increase cash liquidity.

Property Repositioning

Our extensive knowledge of the markets in which we operate and our ability to efficiently plan and execute capital projects provide the expertise to enhance returns by repositioning properties that are underperforming. Many of the properties we own or seek to acquire feature unique architectural design elements or other amenities and characteristics that can be appealing to tenants when fully exploited. Our strategic investment in these properties, combined with our active management and pro-active leasing, provide the opportunity to creatively meet market needs and generate favorable returns.

Development / Redevelopment

Our constant interactions with tenants and other market participants keep us abreast of innovations in workplace layout, store design and smart living. We leverage this information to identify properties primed for development or redevelopment to meet these demands and unlock value. The expertise and relationships that we have built from managing complex construction projects in New York City and its surrounding areas allow us to cost efficiently add new and renovated assets of the highest quality and desirability to our operating portfolio.

6

Debt and Preferred Equity Investments

We invest in well-collateralized debt and preferred equity investments in the markets in which we operate, primarily New York City, that generate attractive yields. See Note 5, "Debt and Preferred Equity Investments," in the accompanying consolidated financial statements. Knowledge of our markets and our leasing and asset management expertise provide underwriting capabilities that enable a highly educated assessment of risk and return. The benefits of this investment program, which has a carefully managed aggregate size, include the following:

• Our typical investments provide high current returns at conservative exposure levels and, in certain cases, the potential for future capital gains. Our expertise and operating capabilities provide both insight and operating skills that mitigate risk.

• In certain instances, these investments serve as a potential source of real estate acquisitions for us when a borrower seeks an efficient off-market transaction. Ownership knows that we are fully familiar with the asset through our existing investment, and that we can close more efficiently and quickly than others. Property owners may also provide us the opportunity to consider off-market transactions involving other properties because we have previously provided debt or preferred equity financing to them.

• These investments are concentrated in Manhattan, which helps us gain market insight, awareness of upcoming investment opportunities and foster key relationships that may provide access to future investment opportunities.

Capital Resources

Our objective is to maintain multiple sources of corporate and property level capital to obtain the most appropriate and lowest cost of capital. This objective is supported by:

• Property operations that generally provide stable and growing cash flows through market cycles due to favorable supply/demand metrics in Manhattan, long average lease terms, high credit quality tenants and superior leasing, operating and asset management skills;

• Concentration of our activities in a Manhattan market that is consistently attractive to property investors and lenders through market cycles relative to other markets;

• Maintaining strong corporate liquidity and careful management of future debt maturities; and

• Maintaining access to corporate capital markets through balanced financing and investment activities that result in strong balance sheet and cash flow metrics.

Manhattan Office Market Overview

Manhattan is by far the largest office market in the United States containing more rentable square feet than the next four largest central business district office markets combined. The properties in our portfolio are primarily concentrated in some of Manhattan's most prominent midtown locations.

According to Cushman and Wakefield Research Services as of December 31, 2018, Manhattan has a total office inventory of approximately 401.0 million square feet, including approximately 242.5 million square feet in midtown. We estimate that approximately 16.3 million square feet of new construction class-A buildings over 250,000 square feet will become available between 2019 and 2023 in Manhattan, approximately 43.4% of which is pre-leased. We estimate that this increase is partially offset by approximately 4.4 million square feet which will be converted from office use to an alternative use. This will add only approximately 0.6% per year to Manhattan's total inventory, net of conversions, over the next five years.

While the addition of new supply to the Manhattan office inventory is nominal relative to the size of the overall market, we view any additional supply as a positive to the Manhattan office market given the older vintage of the majority of Manhattan’s office inventory and the desire of certain tenants to occupy new, high quality, efficient office space, which often isn’t available in older vintage properties. In addition, Manhattan’s office inventory has only grown by approximately 3.4 million square feet over the last 25 years.

General Terms of Leases in the Manhattan Markets

Leases entered into for space in Manhattan typically contain terms that may not be contained in leases in other U.S. office markets. The initial term of leases entered into for space in Manhattan is generally seven to fifteen years. Tenants leasing space in excess of 10,000 square feet for an initial term of 10 years or longer often will negotiate an option to extend the term of the lease for one or two renewal periods, typically for a term of five years each. The base rent during the initial term often will provide for agreed-upon periodic increases over the term of the lease. Base rent for renewal terms is most often based upon the then fair market rental value of the premises as of the commencement date of the applicable renewal term (generally determined by binding arbitration in the event the landlord and the tenant are unable to mutually agree upon the fair market value), though base rent for a renewal period may be set at 95% of the then fair market rent. Very infrequently, leases may contain termination options whereby

7

a tenant can terminate the lease obligation before the lease expiration date upon payment of a penalty together with repayment of the unamortized portion of the landlord's transaction costs (e.g., brokerage commissions, free rent periods, tenant improvement allowances, etc.).

In addition to base rent, a tenant will generally also pay its pro rata share of increases in real estate taxes and operating expenses for the building over a base year, which is typically the year during which the term of the lease commences, based upon the tenant's proportionate occupancy of the building. In some smaller leases (generally less than 10,000 square feet), in lieu of paying additional rent based upon increases in building operating expenses, base rent will be increased each year during the lease term by a set percentage on a compounding basis (though the tenant will still pay its pro rata share of increases in real estate taxes over a base year).

Tenants typically receive a free rent period following commencement of the lease term, which in some cases may coincide with the tenant's construction period.

The landlord most often supplies electricity either on a sub-metered basis at the landlord's cost plus a fixed percentage or a rent inclusion basis (i.e., a fixed fee is added to the base rent for electricity, which amount may increase based upon increases in electricity rates or increases in electrical usage by the tenant). Base building services, other than electricity, such as heat, air conditioning, freight elevator service during business hours and base building cleaning typically are provided at no additional cost, but are included in the building's operating expenses. The tenant will typically pay additional rent only for services which exceed base building services or for services which are provided other than during normal business hours.

In a typical lease for a new tenant renting in excess of 10,000 square feet, the landlord will deliver the premises with existing improvements demolished. In such instances, the landlord will typically provide a tenant improvement allowance, which is a fixed sum that the landlord makes available to the tenant to reimburse the tenant for all or a portion of the tenant's initial construction of its premises. Such sum typically is payable as work progresses, upon submission by the tenant of invoices for the cost of construction and lien waivers. However, in certain leases (most often for relatively small amounts of space), the landlord will construct the premises for the tenant at a cost to the landlord not to exceed an agreed upon amount with the tenant paying any amount in excess of the agreed upon amount. In addition, landlords may rent space to a tenant that is "pre-built" (i.e., space that was constructed by the landlord in advance of lease signing and is ready to for the tenant to move in with the tenant selecting paint and carpet colors).

Occupancy

The following table sets forth the weighted average occupancy rates at our office properties based on space leased for properties owned by us as of December 31, 2018:

	Percent Occupied as of December 31,
Property	2018	2017
Same-Store properties (1) - Manhattan	93.7%	93.8%
Same-Store properties (1) - Suburban	91.3%	92.3%
Manhattan properties	94.5%	93.8%
Suburban properties	91.3%	92.3%
Unconsolidated Joint Venture Properties	95.4%	96.8%
Portfolio	94.2%	93.7%

(1) Same-Store properties represents all operating properties owned by us at January 1, 2017 and still owned by us in the same manner at December 31, 2018, which totaled 40 of our 49 consolidated operating properties.

Rent Growth

We are constantly evaluating our schedule of future lease expirations to mitigate occupancy risk while maximizing rent growth. We proactively manage future lease expirations based on our view of estimated current and future market asking rents. The following table sets forth our future lease expirations, excluding triple net leases, and management's estimates of market asking rents. Taking rents are typically lower than asking rents and may vary from building to building. There can be no assurances that our estimates of market rents are accurate or that market rents currently prevailing will not erode or outperform in the future.

8

	ANNUAL LEASE EXPIRATIONS - MANHATTAN OPERATING PROPERTIES
	Consolidated Properties										Joint Venture Properties
Year of Lease Expiration	Number of Expiring Leases (2)	Rentable Square Footage of Expiring Leases	Percentage of Total Sq. Ft.		Annualized Cash Rent of Expiring Leases		Annualized Cash Rent Per Square Foot of Expiring Leases $/psf (3)		Current Weighted Average Asking Rent $/psf (4)		Number of Expiring Leases (2)	Rentable Square Footage of Expiring Leases	Percentage of Total Sq. Ft.		Annualized Cash Rent of Expiring Leases		Annualized Cash Rent Per Square Foot of Expiring Leases $/psf (3)		Current Weighted Average Asking Rent $/psf (4)
2018 (1)	9	22,898	0.19	%	$1,536,831			$67.12		$100.62	5	16,730	0.15	%		$1,523,868		$91.09		$72.67
1st Quarter 2019	13	85,157	0.70	%	$6,046,396			$71.00		$73.38	2	202,722	1.82	%		$16,897,788		$83.35		$84.78
2nd Quarter 2019	20	64,365	0.53	%	5,505,414		85.53		97.18		7	42,193	0.38	%	3,638,127		86.23		80.68
3rd Quarter 2019	9	97,569	0.80	%	7,135,581		73.13		72.75		10	82,738	0.74	%	5,586,862		67.52		77.19
4th Quarter 2019	30	618,102	5.06	%	48,040,655		77.72		69.10		6	32,098	0.29	%	2,992,213		93.22		109.60
Total 2018	72	865,193	7.09	%	$66,728,046			$77.13		$72.02	25	359,751	3.23	%		$29,114,990		$80.93		$84.77
2020	92	2,272,494	18.60	%		$152,163,212		$66.96		$70.30	23	249,004	2.24	%		$17,756,290		$71.31		$74.82
2021	105	1,191,293	9.75	%	72,109,224		60.53		67.51		32	932,426	8.39	%	69,555,534		74.60		75.30
2022	90	1,048,783	8.58	%	72,400,832		69.03		76.61		33	348,017	3.13	%	39,195,339		112.62		119.29
2023	73	853,016	6.98	%	52,668,025		61.74		65.76		18	459,849	4.14	%	38,188,805		83.05		79.56
2024	35	299,349	2.45	%	21,359,670		71.35		74.12		24	1,031,059	9.27	%	101,559,921		98.50		85.98
2025	36	554,077	4.54	%	53,524,504		96.60		90.02		12	497,458	4.47	%	39,844,313		80.10		83.70
2026	30	788,512	6.45	%	51,612,141		65.46		68.45		17	480,419	4.32	%	49,691,923		103.43		109.48
2027	38	578,686	4.74	%	44,650,725		77.16		73.01		17	310,167	2.79	%	26,193,603		84.45		91.44
Thereafter	91	3,743,016	30.63	%	223,926,495		59.83		67.40		55	6,434,692	57.87	%	416,251,258		64.69		81.74
	671	12,217,317	100.00	%	$812,679,705			$66.52		$70.54	261	11,119,572	100.00	%		$828,875,844		$74.54		$84.16

	ANNUAL LEASE EXPIRATIONS - SUBURBAN OPERATING PROPERTIES
	Consolidated Properties										Joint Venture Properties
Year of Lease Expiration	Number of Expiring Leases (2)	Rentable Square Footage of Expiring Leases	Percentage of Total Sq. Ft.		Annualized Cash Rent of Expiring Leases		Annualized Cash Rent Per Square Foot of Expiring Leases $/psf (3)		Current Weighted Average Asking Rent $/psf (4)		Number of Expiring Leases (2)	Rentable Square Footage of Expiring Leases	Percentage of Total Sq. Ft.		Annualized Cash Rent of Expiring Leases		Annualized Cash Rent Per Square Foot of Expiring Leases $/psf (3)		Current Weighted Average Asking Rent $/psf (4)
2018 (1)	9	71,273	3.64	%	$2,709,023		$38.01		$38.17		—	—	—	%		$—		$—		$—
1st Quarter 2019	7	21,566	1.10	%		$719,937		$33.38		$39.86	—	—	—	%		$—		$—		$—
2nd Quarter 2019	7	19,083	0.97	%	668,151		35.01		36.57		—	—	—	%	—		—		—
3rd Quarter 2019	10	34,713	1.77	%	1,120,499		32.28		37.28		—	—	—	%	—		—		—
4th Quarter 2019	6	172,242	8.79	%	5,122,185		29.74		27.92		—	—	—	%	—		—		—
Total 2018	30	247,604	12.63	%		$7,630,772		$30.82		$30.94	—	—	—	%		$—		$—		$—
2020	37	248,056	12.66	%		$9,125,479		$36.79		$37.58	—	—	—	%		$—		$—		$—
2021	38	272,678	13.91	%	10,079,197		36.96		37.16		—	—	—	%	—		—		—
2022	28	126,582	6.46	%	5,004,423		39.54		39.05		—	—	—	%	—		—		—
2023	25	159,769	8.15	%	5,631,282		35.25		35.14		—	—	—	%	—		—		—
2024	8	49,924	2.55	%	1,634,598		32.74		32.02		—	—	—	%	—		—		—
2025	9	87,449	4.46	%	2,945,942		33.69		35.08		—	—	—	%	—		—		—
2026	16	258,795	13.20	%	9,313,444		35.99		36.96		—	—	—	%	—		—		—
2027	5	190,387	9.71	%	4,852,149		25.49		27.42		—	—	—	%	—		—		—
Thereafter	16	247,434	12.63	%	6,970,040		28.17		28.64		—	—	—	%	—		—		—
	221	1,959,951	100.00	%		$65,896,349		$33.62		$34.15	—	—	—	%		$—		$—		$—

(1) Includes month to month holdover tenants that expired prior to December 31, 2018.

(2) Tenants may have multiple leases.

(3) Represents in place annualized rent allocated by year of expiration.

(4) Management's estimate of current average asking rents for currently occupied space as of December 31, 2018. Taking rents are typically lower than asking rents and may vary from property to property.

Industry Segments

The Company is a REIT that is engaged in the acquisition, development, ownership, management and operation of commercial and residential real estate properties, principally office properties, located in the New York metropolitan area and has two reportable segments: real estate and debt and preferred equity investments. Our industry segments are discussed in Note 21, "Segment Information," in the accompanying consolidated financial statements.

At December 31, 2018, our real estate portfolio was primarily located in one geographical market, the New York metropolitan area. The primary sources of revenue are generated from tenant rents and escalations and reimbursement revenue. Real estate property operating expenses consist primarily of cleaning, security, maintenance, utility costs, real estate taxes and, at certain properties, ground rent expense. As of December 31, 2018, one tenant in our office portfolio contributed 8.2% of our share of

9

annualized cash rent. No other tenant contributed more than 5.0% of our share of annualized cash rent. No property contributed in excess of 10.0% of our consolidated total revenue for 2018.

At December 31, 2018, we held debt and preferred equity investments with a book value of $2.1 billion, including $0.1 billion of debt and preferred equity investments and other financing receivables that are included in balance sheet line items other than the Debt and Preferred Equity Investments line item. At December 31, 2018, the assets underlying our debt and preferred equity investments were located in the New York metropolitan area. The primary sources of revenue are generated from interest and fee income.

Employees

At December 31, 2018, we employed 1,058 employees, 310 of whom were employed in our corporate offices. There are currently six collective bargaining agreements which cover the workforce that services substantially all of our properties.

Highlights from 2018

Our significant achievements from 2018 included:

Corporate

• Repurchased 9.7 million shares of our common stock under our share repurchase program at an average price of $96.22 per share and increased the size of our share repurchase program by $1 billion to $2.5 billion. Through December 31, 2018 we have repurchased a cumulative total of 18.1 million shares of our common stock under the program at an average price of $98.72 per share.

Leasing

• Signed 180 Manhattan office leases covering approximately 2.3 million square feet. The mark-to-market on signed Manhattan office leases was 6.5% higher in 2018 than the previously fully escalated rents on the same spaces.

• Signed 49 Suburban office leases covering approximately 0.4 million square feet. The mark-to-market on signed Suburban office leases was 3.7% lower in 2019 than the previously fully escalated rents on the same spaces.

• Reached 52% leased at One Vanderbilt Avenue after signing leases with Greenberg Traurig, The Carlyle Group, TD Securities, MFA Financial Inc. and McDermott Will & Emery

• Signed a new lease with Coty Inc. for 10,040 square feet at the retail flagship development 719 Seventh Avenue, now known as 30 Times Square.

• Signed a new retail lease with sports brand PUMA for 24,000 square feet and a new lease with WeWork for 138,563 square feet, comprising the entire office portion of the building, at 609 Fifth Avenue.

Acquisitions

• Took ownership of the leasehold interest at 2 Herald Square following the foreclosure of the asset and subsequently completed a recapitalization of the asset, which included securing $150.0 million of mortgage financing and selling a 49.0% interest in the property.

• Announced that we had entered into an agreement to purchase a majority and controlling interest in 460 West 34th Street at a gross purchase price of $440 million.

• Took possession of the retail co-op at 133 Greene Street in Soho. The 6,425 square foot retail space, inclusive of 3,300 square feet on grade, is located along one of SoHo's most popular shopping corridors and is currently occupied by Dior Homme. This property previously served as collateral for a debt and preferred equity investment and was acquired through a negotiated transaction with the sponsor of the investment.

• Took possession of 712 Madison Avenue on Manhattan's Upper East Side. The five-story building offers 6,362 square feet of retail space, which is currently occupied by David Yurman. This property previously served as collateral for a debt and preferred equity investment and was acquired through a negotiated transaction with the sponsor of the investment.

Dispositions

• Closed on the sale of 600 Lexington Avenue for a gross asset valuation of $305.0 million.

• Closed on the sale of an additional 13% interest in 1515 Broadway, thereby completing the previously announced sale of interests totaling 43% at a gross asset valuation of $1.950 billion.

• Together with our joint venture partner, closed on the sale of the multi-family property at 1274 Fifth Avenue at a gross asset valuation of $44.1 million

10

• Together with our joint venture partners, closed on the sale of Stonehenge Village, at a gross asset valuation of $287.0 million.

• Closed on a multi-faceted retail transaction, which included the sale of substantially all of the Company's interest in 724 Fifth Avenue to its joint venture partner, redemption of its investment in 720 Fifth Avenue, and partial repayment of another partnership loan.

• Together with our joint venture partner, closed on the sale of the leasehold office condominium at 1745 Broadway for a sale price of $633 million

• Closed on the sale of the fee interest at 635 Madison Avenue for a sale price of $153.0 million.

• Closed on the sale of Reckson Executive Park in Rye Brook, New York, 115-117 Stevens Avenue, in Valhalla, New York and our 11.7% interest in Jericho Plaza for asset valuations totaling $184.4 million.

• Closed on the sale of our 48.9% interest in 3 Columbus Circle to the Moinian Group, the owner of the remaining 51.1% interest, for a gross asset valuation of $851.0 million

• Closed on the sale of our interests in 1231 Third Avenue and an Upper East Side residential assemblage for a combined sales price of $143.8 million.

• Entered into an agreement to sell our 20.0% interest in 131-137 Spring Street to Invesco Real Estate, the owner of the remaining 80.0% interest.

Debt and Preferred Equity Investments

• Originated and retained, or acquired, $1.0 billion in debt and preferred equity investments, inclusive of advances under future funding obligations, discount and fee amortization, and paid-in-kind interest, net of premium amortization, and recorded $1.0 billion of proceeds from sales, repayments and participations.

Finance

• Issued $350.0 million aggregate principal amount of floating rate notes due 2021. The notes are callable by the Company, at par, after one year and bear interest at a floating rate of 0.98% over LIBOR.

• Closed on a $65.6 million financing of 115 Spring Street. The new mortgage has a 5-year term and bears interest at a floating rate of 3.40% over LIBOR.

• Refinanced One Vanderbilt Avenue's construction facility, increasing the facility size from $1.5 billion to $1.75 billion and decreasing the interest rate by 75 basis points to 2.75% over LIBOR.

• Closed on a $225.0 million construction facility for 185 Broadway. The floating rate facility has a term of three years, with two one-year extension options and bears interest at an initial floating rate of 2.85% over LIBOR.

11

ITEM 1A.    RISK FACTORS

Declines in the demand for office space in the New York metropolitan area, and in particular midtown Manhattan, could adversely affect the value of our real estate portfolio and our results of operations and, consequently, our ability to service current debt and to pay dividends and distributions to security holders.

The majority of our property holdings are comprised of commercial office properties located in midtown Manhattan. Our property holdings also include a number of retail properties and multifamily residential properties. As a result of the concentration of our holdings, our business is dependent on the condition of the New York metropolitan area economy in general and the market for office space in midtown Manhattan in particular. Future weakness and uncertainty in the New York metropolitan area economy could materially reduce the value of our real estate portfolio and our rental revenues, and thus adversely affect our cash flow and our ability to service current debt and to pay dividends and distributions to security holders.

We may be unable to renew leases or relet space as leases expire.

If tenants decide not to renew their leases upon expiration, we may not be able to relet the space. Even if tenants do renew or we can relet the space, the terms of a renewal or new lease, taking into account among other things, the cost of improvements to the property and leasing commissions, may be less favorable than the terms in the expired leases. As of December 31, 2018, approximately 52.1% and approximately 21.3% of the rentable square feet, are scheduled to expire by December 31, 2023 at our consolidated properties and unconsolidated joint venture properties, respectively, and as of December 31, 2018, these leases had annualized escalated rent totaling $457.8 million and $195.3 million, respectively. In addition, changes in space utilization by tenants may impact our ability to renew or relet space without the need to incur substantial costs in renovating or redesigning the internal configuration of the relevant property. If we are unable to promptly renew the leases or relet the space at similar rates or if we incur substantial costs in renewing or reletting the space, our cash flow and ability to service debt obligations and pay dividends and distributions to security holders could be adversely affected.

We face significant competition for tenants.

The leasing of real estate is highly competitive. The principal competitive factors are rent, location, services provided and the nature and condition of the property to be leased. We directly compete with all owners, developers and operators of similar space in the areas in which our properties are located.

Our commercial office properties are concentrated in highly developed areas of the New York metropolitan area. Manhattan is the largest office market in the United States. The number of competitive office properties in the New York metropolitan area, which may be newer or better located than our properties, could have a material adverse effect on our ability to lease office space at our properties, and on the effective rents we are able to charge.

The expiration of long term leases or operating sublease interests where we do not own a fee interest in the land could adversely affect our results of operations.

Our interests in 420 Lexington Avenue, 461 Fifth Avenue, 711 Third Avenue, 625 Madison Avenue, 1185 Avenue of the Americas, 1080 Amsterdam Avenue, 650 Fifth Avenue, 2 Herald Square, and 30 East 40th Street, all in Manhattan, and 1055 Washington Avenue, Stamford, Connecticut, are entirely or partially comprised of either long-term leasehold or operating sublease interests in the land and the improvements, rather than by ownership of fee interest in the land.

We have the ability to acquire the fee positions at 461 Fifth Avenue and 2 Herald Square for fixed prices on specific dates and own 50% of the fee position at 711 Third Avenue. The average remaining term of these long-term leases as of December 31, 2018, including our unilateral extension rights on each of the properties, is 42 years. Pursuant to the leasehold arrangements, we, as tenant under the operating sublease, perform the functions traditionally performed by landlords with respect to our subtenants. We are responsible for not only collecting rent from our subtenants, but also maintaining the property and paying expenses relating to the property. Annualized cash rents, including our share of joint venture annualized cash rents, from properties held through long-term leases or operating sublease interests at December 31, 2018 totaled $321.3 million, or 23.7%, of our share of total Portfolio annualized cash rent. Unless we purchase a fee interest in the underlying land or extend the terms of these leases prior to expiration, we will lose our right to operate these properties upon expiration of the leases, which could adversely affect our financial condition and results of operations. Rent payments under leasehold or operating sublease interests are adjusted, within the parameters of the contractual arrangements, at certain intervals. Rent adjustments may result in higher rents that could adversely affect our financial condition and results of operation.

We rely on five large properties for a significant portion of our revenue.

Five of our properties, 11 Madison Avenue, 1185 Avenue of the Americas, 420 Lexington Avenue, 1515 Broadway, and 1 Madison Avenue accounted for 32.4% of our Portfolio annualized cash rent, which includes our share of joint venture annualized cash rent, as of December 31, 2018.

12

Our revenue and cash available to service debt obligations and for distribution to our stockholders would be materially adversely affected if any of these properties were materially damaged or destroyed. Additionally, our revenue and cash available to service debt obligations and for distribution to our stockholders would be materially adversely affected if tenants at these properties fail to timely make rental payments due to adverse financial conditions or otherwise, default under their leases or file for bankruptcy or become insolvent.

Our results of operations rely on major tenants and insolvency or bankruptcy of these or other tenants could adversely affect our results of operations.

Giving effect to leases in effect as of December 31, 2018 for consolidated properties and unconsolidated joint venture properties, as of that date, our five largest tenants, based on annualized cash rent, accounted for 17.5% of our share of Portfolio annualized cash rent, with one tenant, Credit Suisse Securities (USA) LLC, accounting for 8.2% of our share of Portfolio annualized cash rent, respectively. Our business and results of operations would be adversely affected if any of our major tenants became insolvent, declared bankruptcy, or otherwise refused to pay rent in a timely fashion or at all. In addition, if business conditions in the industries in which our tenants are concentrated deteriorate, or economic volatility has a disproportionate impact on our clients, we may experience increases in past due accounts, defaults, lower occupancy and reduced effective rents across tenants in such industries, which could in turn have an adverse effect on our business and results of operations.

Construction is in progress at our development projects

The Company continues its significant ground-up development project, One Vanderbilt, as well as other smaller development projects. Construction of One Vanderbilt is expected to be completed in 2020. At this or other development projects, unforeseen matters could delay completion, result in increased costs or otherwise have a material effect on our results of operations. In addition, the extended time frame to complete these projects could cause them to be subject to shifts and trends in the real estate market which may not be consistent with our current business plans for the properties.

We are subject to risks that affect the retail environment.

Approximately 6.1% of our Portfolio annualized cash rent is generated by retail properties, principally in Manhattan. As a result, we are subject to risks that affect the retail environment generally, including the level of consumer spending and preferences, consumer confidence, electronic retail competition and levels of tourism in Manhattan. These factors could adversely affect the financial condition of our retail tenants and the willingness of retailers to lease space in our retail properties, which could in turn have an adverse effect on our business and results of operations.

Adverse economic and geopolitical conditions in general and the commercial office markets in particular could have a material adverse effect on our results of operations and financial condition and, consequently, our ability to service debt obligations and to pay dividends and distributions to security holders.

Our business may be affected by volatility in the financial and credit markets and other market, economic, or political challenges experienced by the U.S. economy or the real estate industry as a whole, including changes in law and policy and uncertainty in connection with any such changes. Future periods of economic weakness or volatility could result in reduced access to credit and/or wider credit spreads. Economic or political uncertainty, including concern about growth and the stability of the markets generally and changes in the federal interest rates, may lead many lenders and institutional investors to reduce, and in some cases, cease to provide funding to borrowers, which could adversely affect our liquidity and financial condition, and the liquidity and financial condition of our tenants. Specifically, our business may be affected by the following conditions:

• significant job losses or declining rates of job creation which may decrease demand for our office space, causing market rental rates and property values to be negatively impacted;

• our ability to borrow on terms and conditions that we find acceptable may be limited, which could reduce our ability to pursue acquisition and development opportunities and refinance existing debt, reducing our returns from both our existing operations and our acquisition and development activities and increasing our future interest expense; and

• reduced values of our properties, which may limit our ability to dispose of assets at attractive prices or to obtain debt financing secured by our properties and may reduce the availability of unsecured loans.

Leasing office space to smaller and growth-oriented businesses could adversely affect our cash flow and results of operations.

Some of the tenants in our properties are smaller, growth-oriented businesses that may not have the financial strength of larger corporate tenants. Smaller companies generally experience a higher rate of failure than larger businesses. Growth-oriented firms may also seek other office space as they develop. Leasing office space to these companies could create a higher risk of tenant defaults, turnover and bankruptcies, which could adversely affect our cash flow and results of operations.

13

We may suffer adverse consequences if our revenues decline since our operating costs do not necessarily decline in proportion to our revenue.

We earn a significant portion of our income from renting our properties. Our operating costs, however, do not necessarily fluctuate in direct proportion to changes in our rental revenue. As a result, our costs will not necessarily decline even if our revenues do. In such event, we may be forced to borrow to cover our costs, we may incur losses or we may not have cash available to service our debt and to pay dividends and distributions to security holders.

Competition for acquisitions may reduce the number of acquisition opportunities available to us and increase the costs of those acquisitions.

We may acquire properties when we are presented with attractive opportunities. We may face competition for acquisition opportunities from other investors, particularly those investors who are willing to incur more leverage, and this competition may adversely affect us by subjecting us to the following risks:

• an inability to acquire a desired property because of competition from other well-capitalized real estate investors, including publicly traded and privately held REITs, private real estate funds, domestic and foreign financial institutions, life insurance companies, sovereign wealth funds, pension trusts, partnerships and individual investors; and

• an increase in the purchase price for such acquisition property.

If we are unable to successfully acquire additional properties, our ability to grow our business could be adversely affected. In addition, increases in the cost of acquisition opportunities could adversely affect our results of operations.

We face risks associated with property acquisitions.

Our acquisition activities may not be successful if we are unable to meet required closing conditions or unable to finance acquisitions and developments of properties on favorable terms or at all. Additionally, we have less visibility into the future performance of acquired properties than properties that we have owned for a period of time, and therefore, recently acquired properties may not be as profitable as our existing portfolio.

Further, we may acquire properties subject to both known and unknown liabilities and without any recourse, or with only limited recourse to the seller. As a result, if a liability were asserted against us arising from our ownership of those properties, we might have to pay substantial sums to settle it, which could adversely affect our cash flow. Unknown liabilities with respect to properties acquired might include:

• claims by tenants, vendors or other persons arising from dealing with the former owners of the properties;

• liabilities incurred in the ordinary course of business;

• claims for indemnification by general partners, directors, officers and others indemnified by the former owners of the properties; and

• liabilities for clean-up of undisclosed environmental contamination.

Limitations on our ability to sell or reduce the indebtedness on specific properties could adversely affect the value of our common stock.

In connection with past and future acquisitions of interests in properties, we have or may agree to restrictions on our ability to sell or refinance the acquired properties for certain periods. These limitations could result in us holding properties which we would otherwise sell, or prevent us from paying down or refinancing existing indebtedness, any of which may have adverse consequences on our business and result in a material adverse effect on our financial condition and results of operations.

14

Potential losses may not be covered by insurance.

We maintain “all-risk” property and rental value coverage (including coverage regarding the perils of flood, earthquake and terrorism, excluding nuclear, biological, chemical, and radiological terrorism ("NBCR")), within three property insurance programs and liability insurance. Separate property and liability coverage may be purchased on a stand-alone basis for certain assets, such as the development of One Vanderbilt. Additionally, one of our captive insurance companies, Belmont Insurance Company, or Belmont, provides coverage for NBCR terrorist acts above a specified trigger. Belmont's retention is reinsured by our other captive insurance company, Ticonderoga Insurance Company ("Ticonderoga"). If Belmont or Ticonderoga are required to pay a claim under our insurance policies, we would ultimately record the loss to the extent of required payments. However, there is no assurance that in the future we will be able to procure coverage at a reasonable cost. Further, if we experience losses that are uninsured or that exceed policy limits, we could lose the capital invested in the damaged properties as well as the anticipated future cash flows from those properties. Additionally, our debt instruments contain customary covenants requiring us to maintain insurance and we could default under debt our instruments if the cost and/or availability of certain types of insurance make it impractical or impossible to comply with such covenants relating to insurance. Belmont and Ticonderoga provide coverage solely on properties owned by the Company or its affiliates.

Furthermore, with respect to certain of our properties, including properties held by joint ventures, or subject to triple net leases, insurance coverage is obtained by a third-party and we do not control the coverage. While we may have agreements with such third parties to maintain adequate coverage and we monitor these policies, such coverage ultimately may not be maintained or adequately cover our risk of loss.

The occurrence of a terrorist attack may adversely affect the value of our properties and our ability to generate cash flow.

Our operations are primarily concentrated in the New York metropolitan area. In the aftermath of a terrorist attack or other acts of terrorism or war, tenants in the New York metropolitan area may choose to relocate their business to less populated, lower-profile areas of the United States that those tenants believe are not as likely to be targets of future terrorist activity. In addition, economic activity could decline as a result of terrorist attacks or other acts of terrorism or war, or the perceived threat of such acts. Each of these impacts could in turn trigger a decrease in the demand for space in the New York metropolitan area, which could increase vacancies in our properties and force us to lease our properties on less favorable terms. While under the Terrorism Risk Insurance Program Reauthorization Act of 2015, insurers must make terrorism insurance available under their property and casualty insurance policies, this legislation does not regulate the pricing of such insurance. The absence of affordable terrorism insurance coverage may adversely affect the general real estate lending market, lending volume and the market's overall liquidity and, in the event of an uninsured loss, we could lose all or a portion of our assets. Furthermore, we may also experience increased costs in relation to security equipment and personnel. As a result, the value of our properties and our results of operations could materially decline.

We face possible risks associated with the natural disasters and the physical effects of climate change.

We are subject to risks associated with natural disasters and the physical effects of climate change, which can include storms, hurricanes and flooding, any of which could have a material adverse effect on our properties, operations and business. To the extent climate change causes changes in weather patterns, our markets could experience increases in storm intensity and rising sea-levels. Over time, these conditions could result in declining demand for office space in our buildings or the inability of us to operate the buildings at all. Climate change may also have indirect effects on our business by increasing the cost of (or making unavailable) property insurance on terms we find acceptable, increasing the cost of energy at our properties and requiring us to expend funds as we seek to repair and protect our properties against such risks. There can be no assurance that climate change will not have a material adverse effect on our properties, operations or business.

We depend on dividends and distributions from our direct and indirect subsidiaries.

Substantially all of our assets are held through subsidiaries of our Operating Partnership. Our Operating Partnership’s cash flow is dependent on cash distributions to it by its subsidiaries, and in turn, substantially all of our cash flow is dependent on cash distributions to us by our Operating Partnership. The creditors of each of our direct and indirect subsidiaries are entitled to payment of that subsidiary’s obligations to them, when due and payable, before distributions may be made by that subsidiary to its equity holders.

Therefore, our Operating Partnership’s ability to make distributions to holders of its partnership units depends on its subsidiaries’ ability first to satisfy their obligations to their creditors and then to make distributions to our Operating Partnership. Likewise, our ability to pay dividends to holders of common stock and preferred stock depends on our Operating Partnership’s ability first to satisfy its obligations to its creditors and make distributions payable to holders of preferred units and then to make distributions to us.

Furthermore, the holders of preferred partnership units of our Operating Partnership are entitled to receive preferred distributions before payment of distributions to holders of common units of our Operating Partnership, including us. Thus, our

15

ability to pay cash dividends to our shareholders and satisfy our debt obligations depends on our Operating Partnership’s ability first to satisfy its obligations to its creditors and make distributions to holders of its preferred partnership units and then to holders of its common units, including us.

In addition, our participation in any distribution of the assets of any of our direct or indirect subsidiaries upon any liquidation, reorganization or insolvency is only after the claims of the creditors, including trade creditors and preferred security holders, are satisfied.

Debt financing, financial covenants, degree of leverage, and increases in interest rates could adversely affect our economic performance.

Scheduled debt payments could adversely affect our results of operations.

Cash flow could be insufficient to pay dividends and meet the payments of principal and interest required under our current mortgages, our 2017 credit facility, our senior unsecured notes, our debentures and indebtedness outstanding at our joint venture properties. The total principal amount of our outstanding consolidated indebtedness was $5.5 billion as of December 31, 2018, consisting of $1.5 billion in unsecured bank term loans (or "Term Loan A" and "Term Loan B"), $1.5 billion under our senior unsecured notes, $0.1 billion of junior subordinated deferrable interest debentures, $2.0 billion of non-recourse mortgages and loans payable on certain of our properties and debt and preferred equity investments, $500.0 million drawn under our revolving credit facility, and $11.8 million letters of credit. In addition, we could increase the amount of our outstanding consolidated indebtedness in the future, in part by borrowing under the revolving credit facility portion of our 2017 credit facility. As of December 31, 2018, the total principal amount of non-recourse indebtedness outstanding at the joint venture properties was $9.1 billion, of which our proportionate share was $3.8 billion. As of December 31, 2018, we had no recourse indebtedness outstanding at our unconsolidated joint venture properties.

If we are unable to make payments under our 2017 credit facility, all amounts due and owing at such time shall accrue interest at a rate equal to 2% higher than the rate at which each draw was made. If we are unable to make payments under our senior unsecured notes, the principal and unpaid interest will become immediately payable. If a property is mortgaged to secure payment of indebtedness and we are unable to meet mortgage payments, the mortgagee could foreclose on the property, resulting in loss of income and asset value. Foreclosure on mortgaged properties or an inability to make payments under our 2017 credit facility or our senior unsecured notes could trigger defaults under the terms of our other financings, making such financings at risk of being declared immediately payable, and would have a negative impact on our financial condition and results of operations.

We may not be able to refinance existing indebtedness, which may require substantial principal payments at maturity. $27.5 million of consolidated mortgage debt and $102.8 million of unconsolidated joint venture debt is scheduled to mature in 2019 after giving effect to repayments and refinancing of consolidated and joint venture debt between December 31, 2018 and February 25, 2019 as discussed in the "Financial Statements and Supplementary Data" section. At the present time, we intend to repay, refinance, or exercise extension options on the debt associated with our properties on or prior to their respective maturity dates. At the time of refinancing, prevailing interest rates or other factors, such as the possible reluctance of lenders to make commercial real estate loans, may result in higher interest rates. Increased interest expense on the extended or refinanced debt would adversely affect cash flow and our ability to service debt obligations and pay dividends and distributions to security holders. If any principal payments due at maturity cannot be repaid, refinanced or extended, our cash flow will not be sufficient to repay maturing or accelerated debt.

Financial covenants could adversely affect our ability to conduct our business.

The mortgages and mezzanine loans on our properties generally contain customary negative covenants that limit our ability to further mortgage the properties, to enter into material leases without lender consent or materially modify existing leases, among other things. In addition, our 2017 credit facility and senior unsecured notes contain restrictions and requirements on our method of operations. Our 2017 credit facility and our unsecured notes also require us to maintain designated ratios, including but not limited to, total debt-to-assets, debt service coverage and unencumbered assets-to-unsecured debt. These restrictions could adversely affect operations (including reducing our flexibility and our ability to incur additional debt), our ability to pay debt obligations and our ability to pay dividends and distributions to security holders.

Rising interest rates could adversely affect our cash flow.

Advances under our 2017 credit facility and certain property-level mortgage debt bear interest at a variable rate. Our consolidated variable rate borrowings totaled $2.0 billion at December 31, 2018. In addition, we could increase the amount of our outstanding variable rate debt in the future, in part by borrowing additional amounts under our 2017 credit facility. Borrowings under our revolving credit facility and term loans bore interest at the 30-day LIBOR, plus spreads of 100 basis points, 110 basis points, and 165 basis points, respectively, at December 31, 2018. As of December 31, 2018, borrowings under our term loans and junior subordinated deferrable interest debentures totaled $1.5 billion and $100.0 million, respectively. We may incur indebtedness in the future that also bears interest at a variable rate or may be required to refinance our debt at higher rates. At December 31, 2018, a hypothetical 100 basis point increase in interest rates across each of our variable interest rate instruments, including our

16

variable rate debt and preferred equity investments which mitigate our exposure to interest rate changes, would increase our net annual interest costs by $7.1 million and would increase our share of joint venture annual interest costs by $14.3 million. Our joint ventures may also incur variable rate debt and face similar risks. Accordingly, increases in interest rates could adversely affect our results of operations and financial conditions and our ability to continue to pay dividends and distributions to security holders.

The potential phasing out of LIBOR after 2021 may affect our financial results.

The chief executive of the United Kingdom Financial Conduct Authority ("FCA"), which regulates LIBOR, has announced that the FCA intends to stop compelling banks to submit rates for the calculation of LIBOR after 2021. It is not possible to predict the effect of these changes or the establishment of alternative reference rates.

The Alternative Reference Rate Committee ("ARRC"), a committee convened by the Federal Reserve that includes major market participants, and on which the SEC staff and other regulators participate, has proposed an alternative rate to replace U.S. Dollar LIBOR, the Secured Overnight Financing Rate (“SOFR”). Any changes announced by the FCA, ARRC, other regulators or any other successor governance or oversight body, or future changes adopted by such body, in the method pursuant to which U.S. Dollar LIBOR, SOFR, or any other alternative rates are determined may result in a sudden or prolonged increase or decrease in the reported LIBOR rates. If that were to occur, the levels of interest payments we incur and interest payments we receive may change. In addition, although certain of our LIBOR based obligations and investments provide for alternative methods of calculating the interest rate if LIBOR is not reported, uncertainty as to the extent and manner of future changes may result in interest rates and/or payments that are higher than, lower than or that do not otherwise correlate over time with the interest rates and/or payments that would have been made on our obligations if LIBOR rate was available in its current form.

Failure to hedge effectively against interest rate changes may adversely affect results of operations.

The interest rate hedge instruments we use to manage some of our exposure to interest rate volatility involve risk and counterparties may fail to honor their obligations under these arrangements. In addition, these arrangements may not be effective in reducing our exposure to interest rate changes and when existing interest rate hedges terminate, we may incur increased costs in putting in place further interest rate hedges. Failure to hedge effectively against interest rate changes may adversely affect our results of operations.

Increases in our leverage could adversely affect our stock price.

Our organizational documents do not contain any limitation on the amount of indebtedness we may incur. We consider many factors when making decisions regarding the incurrence of indebtedness, such as the purchase price of properties to be acquired with debt financing, the estimated market value of our properties and the ability of particular properties and our business as a whole to generate cash flow to cover expected debt service. Any changes that increase our leverage could be viewed negatively by investors. As a result, our stock price could decrease.

A downgrade in our credit ratings could materially adversely affect our business and financial condition.

Our credit rating and the credit ratings assigned to our debt securities and our preferred stock could change based upon, among other things, our results of operations and financial condition. These ratings are subject to ongoing evaluation by credit rating agencies, and any rating could be changed or withdrawn by a rating agency in the future if, in its judgment, circumstances warrant such action. Moreover, these credit ratings are not recommendations to buy, sell or hold our common stock or any other securities. If any of the credit rating agencies that have rated our securities downgrades or lowers its credit rating, or if any credit rating agency indicates that it has placed any such rating on a “watch list” for a possible downgrading or lowering, or otherwise indicates that its outlook for that rating is negative, such action could have a material adverse effect on our costs and availability of funding, which could in turn have a material adverse effect on our financial condition, results of operations, cash flows, the trading price of our securities and our ability to satisfy our debt service obligations and to pay dividends and distributions to security holders.

Debt and preferred equity investments could cause us to incur expenses, which could adversely affect our results of operations.

We held first mortgages, mezzanine loans, junior participations and preferred equity interests with an aggregate net book value of $2.1 billion at December 31, 2018. Some of these instruments may be recourse to their sponsors, while others are limited to the collateral securing the loan. In the event of a default under these obligations, we may have to take possession of the collateral securing these interests. Borrowers may contest enforcement of foreclosure or other remedies, seek bankruptcy protection against such enforcement and/or bring claims for lender liability in response to actions to enforce their obligations to us. Declines in the value of the property may prevent us from realizing an amount equal to our investment upon foreclosure or realization even if we make substantial improvements or repairs to the underlying real estate in order to maximize such property's investment potential. In addition, we may invest in mortgage-backed securities and other marketable securities.

17

We maintain and regularly evaluate the need for reserves to protect against potential future losses. Our reserves reflect management's judgment of the probability and severity of losses and the value of the underlying collateral. We cannot be certain that our judgment will prove to be correct and that our reserves will be adequate over time to protect against future losses because of unanticipated adverse changes in the economy or events adversely affecting specific properties, assets, tenants, borrowers, industries in which our tenants and borrowers operate or markets in which our tenants and borrowers or their properties are located. If our reserves for credit losses prove inadequate, we could suffer losses which would have a material adverse effect on our financial performance, the market prices of our securities and our ability to pay dividends and distributions to security holders.

Joint investments could be adversely affected by our lack of sole decision-making authority and reliance upon a co-venturer's financial condition.

We co-invest with third parties through partnerships, joint ventures, co-tenancies or other structures, and by acquiring non-controlling interests in, or sharing responsibility for managing the affairs of, a property, partnership, joint venture, co-tenancy or other entity. Therefore, we may not be in a position to exercise sole decision-making authority regarding such property, partnership, joint venture or other entity. Investments in partnerships, joint ventures, or other entities may involve risks not present were a third party not involved, including the possibility that our partners, co-tenants or co-venturers might become bankrupt or otherwise fail to fund their share of required capital contributions. Additionally, our partners or co-venturers might at any time have economic or other business interests or goals which are competitive or inconsistent with our business interests or goals. These investments may also have the potential risk of impasses on decisions such as a sale, because neither we, nor the partner, co-tenant or co-venturer would have full control over the partnership or joint venture. In addition, we may in specific circumstances be liable for the actions of our third-party partners, co-tenants or co-venturers. As of December 31, 2018, we had an aggregate cost basis in these joint ventures totaling $3.0 billion.

Certain of our joint venture agreements contain terms in favor of our partners that could have an adverse effect on the value of our investments in the joint ventures.

Each of our joint venture agreements has been individually negotiated with our partner in the joint venture and, in some cases, we have agreed to terms that are more favorable to our partner in the joint venture than to us. For example, our partner may be entitled to a specified portion of the profits of the joint venture before we are entitled to any portion of such profits. We may also enter into similar arrangements in the future. These rights may permit our partner in a particular joint venture to obtain a greater benefit from the value or profits of the joint venture than us, which could have an adverse effect on the value of our investment in the joint venture and on our financial condition and results of operations.

We may incur costs to comply with governmental laws and regulations.

We are subject to various federal, state and local environmental and health and safety laws that can impose liability on current and former property owners or operators for the clean-up of certain hazardous substances released on a property or of contamination at any facility (e.g., a landfill) to which we have sent hazardous substances for treatment or disposal, without regard to fault or whether the release or disposal was in compliance with law. Being held responsible for such a clean-up could result in significant cost to us and have a material adverse effect on our financial condition and results of operations.

Our properties may be subject to risks relating to current or future laws, including laws benefiting disabled persons, such as the Americans with Disabilities Act, or ADA, and state or local zoning, construction or other regulations. Compliance with such laws may require significant property modifications in the future, which could be costly and non-compliance could result in fines being levied against us in the future. Such costs could have an adverse impact on our cash flows and ability to pay dividends to stockholders.

Our charter documents, debt instruments and applicable law may hinder any attempt to acquire us, which could discourage takeover attempts and prevent our stockholders from receiving a premium over the market price of our stock.

Provisions of our charter and bylaws could inhibit changes in control.

A change of control of our company could benefit stockholders by providing them with a premium over the then-prevailing market price of our stock. However, provisions contained in our charter and bylaws may delay or prevent a change in control of our company. These provisions, discussed more fully below, are:

• staggered board of directors;

• ownership limitations; and

• the board of directors' ability to issue additional common stock and preferred stock without stockholder approval.

Our board of directors is currently staggered into three separate classes.

At our 2017 Annual Meeting of Stockholders, held on June 1, 2017, our stockholders voted to declassify the board of directors. Beginning with the election of the class I directors at the 2018 Annual Meeting of Stockholders, our board of directors

18

has been elected for terms ending at the next annual meeting of stockholders following their election and until their successors are duly elected and qualify. By the 2020 Annual Meeting of Stockholders, our board of directors will be fully declassified.

Currently, our board of directors is divided into three classes. The terms of the class I and class II directors expire in 2019, and the terms of the class III directors expire in 2020. The nature of the different expiration dates for directors may deter a change in control because of the increased time period necessary for a third-party to acquire control of the board.

We have a stock ownership limit.

To remain qualified as a REIT for federal income tax purposes, not more than 50% in value of our outstanding capital stock may be owned by five or fewer individuals at any time during the last half of any taxable year. For this purpose, stock may be "owned" directly, as well as indirectly under certain constructive ownership rules, including, for example, rules that attribute stock held by one shareholder to another shareholder. In part to avoid violating this rule regarding stock ownership limitations and maintain our REIT qualification, our charter prohibits ownership by any single stockholder of more than 9.0% in value or number of shares of our common stock. Limitations on the ownership of preferred stock may also be imposed by us.

Our board of directors has the discretion to raise or waive this limitation on ownership for any stockholder if deemed to be in our best interest. Our board of directors has granted such waivers from time to time. To obtain a waiver, a stockholder must present the board and our tax counsel with evidence that ownership in excess of this limit will not affect our present or future REIT status.

Absent any exemption or waiver, stock acquired or held in excess of the limit on ownership will be transferred to a trust for the exclusive benefit of a designated charitable beneficiary, and the stockholder's rights to distributions and to vote would terminate. The stockholder would be entitled to receive, from the proceeds of any subsequent sale of the shares transferred to the charitable trust, the lesser of: the price paid for the stock or, if the owner did not pay for the stock, the market price of the stock on the date of the event causing the stock to be transferred to the charitable trust; and the amount realized from the sale.

This limitation on ownership of stock could delay or prevent a change in control of our company.

Maryland takeover statutes may prevent a change of control of our company, which could depress our stock price.

Under the Maryland General Corporation Law, or the MGCL, "business combinations" between a Maryland corporation and an interested stockholder or an affiliate of an interested stockholder are prohibited for five years after the most recent date on which the interested stockholder becomes an interested stockholder. These business combinations include a merger, consolidation, stock exchange or, in circumstances specified in the statute, an asset transfer or issuance or reclassification of equity securities. An interested stockholder is defined as:

• any person who beneficially owns 10% or more of the voting power of the corporation's outstanding voting stock; or

• an affiliate or associate of the corporation who, at any time within the two-year period prior to the date in question, was the beneficial owner of 10% or more of the voting power of the then outstanding voting stock of the corporation.

A person is not an interested stockholder under the statute if the board of directors approves in advance the transaction by which he otherwise would have become an interested stockholder.

After the five-year prohibition, any business combination between the Maryland corporation and an interested stockholder generally must be recommended by the board of directors of the corporation and approved by the affirmative vote of at least:

• 80% of the votes entitled to be cast by holders of outstanding shares of voting stock of the corporation, voting together as a single group; and

• two-thirds of the votes entitled to be cast by holders of voting stock of the corporation other than shares held by the interested stockholder with whom or with whose affiliate the business combination is to be effected or held by an affiliate or associate of the interested stockholder.

The business combination statute may discourage others from trying to acquire control of us and increase the difficulty of consummating any offer, including potential acquisitions that might involve a premium price for our common stock or otherwise be in the best interest of our stockholders.

In addition, Maryland law provides that holders of "control shares" of a Maryland corporation acquired in a "control share acquisition" will not have voting rights with respect to the control shares except to the extent approved by a vote of two-thirds of the votes entitled to be cast on the matter, excluding shares of stock owned by the acquiror, by officers of the corporation or by directors who are employees of the corporation, under the Maryland Control Share Acquisition Act. "Control shares" means voting shares of stock that, if aggregated with all other shares of stock owned by the acquiror or in respect of which the acquiror is able to exercise or direct the exercise of voting power (except solely by virtue of a revocable proxy), would entitle the acquiror to exercise voting power in electing directors within one of the following ranges of voting power: (i) one-tenth or more but less than one-third; (ii) one-third or more but less than a majority; or (iii) a majority or more of all voting power. A "control share acquisition"

19

means the acquisition of ownership of, or the power to direct the exercise of voting power with respect to, issued and outstanding control shares, subject to certain exceptions.

We have opted out of these provisions of the MGCL, with respect to business combinations and control share acquisitions, by resolution of our board of directors and a provision in our bylaws, respectively. However, in the future, our board of directors may reverse its decision by resolution and elect to opt in to the MGCL's business combination provisions, or amend our bylaws and elect to opt in to the MGCL's control share provisions.

Additionally, the MGCL permits our board of directors, without stockholder approval and regardless of what is provided in our charter or bylaws, to implement takeover defenses, some of which have not been implemented by our board of directors. Such takeover defenses, if implemented, may have the effect of inhibiting a third party from making us an acquisition proposal or of delaying, deferring or preventing a change in our control under circumstances that otherwise could provide our stockholders with an opportunity to realize a premium over the then-current market price.

Contractual provisions that limit the assumption of certain of our debt may prevent a change in control.

Certain of our consolidated debt is not assumable and may be subject to significant prepayment penalties. These limitations could deter a change in control of our company.

Compliance with changing or new regulations applicable to corporate governance and public disclosure may result in additional expenses, or affect our operations.

Changing or new laws, regulations and standards relating to corporate governance and public disclosure, including SEC regulations and NYSE rules, can create uncertainty for public companies. These changed or new laws, regulations and standards are subject to varying interpretations in many cases due to their lack of specificity. As a result, their application in practice may evolve over time as new guidance is provided by regulatory and governing bodies, which could result in continuing uncertainty regarding compliance matters and higher costs necessitated by ongoing revisions to disclosure and governance practices. We are committed to maintaining high standards of corporate governance and public disclosure. If our efforts to comply with new or changed laws, regulations and standards differ from the activities intended by regulatory or governing bodies due to ambiguities related to practice, our reputation may be harmed.

Our efforts to comply with evolving laws, regulations and standards have resulted in, and are likely to continue to result in, increased general and administrative expenses and a diversion of management time and attention from revenue-generating activities to compliance activities. In particular, our continued efforts to comply with Section 404 of the Sarbanes-Oxley Act of 2002 and the related regulations regarding our required assessment of our internal controls over financial reporting and our external auditors' audit of that assessment have required the commitment of significant financial and managerial resources. We expect these efforts to require the continued commitment of significant resources. Further, our directors, chief executive officer and chief financial officer could face an increased risk of personal liability in connection with the performance of their duties. As a result, we may have difficulty attracting and retaining qualified directors and executive officers, which could harm our business.

Future issuances of common stock, preferred stock and convertible debt could dilute existing stockholders' interests.

Our charter authorizes its board of directors to issue additional shares of common stock, preferred stock and convertible equity or debt without stockholder approval and without the requirement to offer rights of pre-emption to existing stockholders. Any such issuance could dilute our existing stockholders' interests. Also, any future series of preferred stock may have voting provisions that could delay or prevent a change of control of our company.

Changes in market conditions could adversely affect the market price of our common stock.

As with other publicly traded equity securities, the value of our common stock depends on various market conditions, which may change from time to time. In addition to the current economic environment and future volatility in the securities and credit markets, the following market conditions may affect the value of our common stock:

• the general reputation of REITs and the attractiveness of our equity securities in comparison to other equity securities, including securities issued by other real estate-based companies;

• our financial performance; and

• general stock and bond market conditions.

The market value of our common stock is based on a number of factors including, but not limited to, the market's perception of the current and future value of our assets, our growth potential and our current and potential future earnings and cash dividends. Consequently, our common stock may trade at prices that are higher or lower than our net asset value per share of common stock.

20

The trading price of our common stock has been and may continue to be subject to wide fluctuations.

Between January 1, 2018 and December 31, 2018, the closing sale price of our common stock on the New York Stock Exchange, or the NYSE, ranged from $77.63 to $105.86 per share. Our stock price may fluctuate in response to a number of events and factors, such as those described elsewhere in this "Risk Factors" section. Equity issuances or buybacks by us or the perception that such issuances or buybacks may occur may also affect the market price of our common stock.

We may in the future pay taxable dividends on our common stock in common stock and cash.

In order to qualify as a REIT, we are required to annually distribute to our stockholders at least 90% of our REIT taxable income, excluding net capital gain. In order to avoid taxation of our income, we are required to annually distribute to our stockholders all of our taxable income, including net capital gain. In order to satisfy these requirements, we may make distributions that are payable partly in cash and partly in shares of our common stock. If we pay such a dividend, taxable stockholders would be required to include the entire amount of the dividend, including the portion paid with shares of common stock, as income to the extent of our current and accumulated earnings and profits, and may be required to pay income taxes with respect to such dividends in excess of the cash dividends received.

We are dependent on external sources of capital.

We need a substantial amount of capital to operate and grow our business. This need is exacerbated by the distribution requirements imposed on us for SL Green to qualify as a REIT. We therefore rely on third-party sources of capital, which may not be available on favorable terms or at all. Our access to third-party sources of capital depends on a number of things, including the market's perception of our growth potential and our current and potential future earnings. In addition, we anticipate raising money in the public equity and debt markets with some regularity and our ability to do so will depend upon the general conditions prevailing in these markets. At any time, conditions may exist which effectively prevent us, or REITs in general, from accessing these markets. Moreover, additional equity offerings may result in substantial dilution of our stockholders' interests, and additional debt financing may substantially increase our leverage.

Our property taxes could increase due to reassessment or property tax rate changes.

We are required to pay real property taxes in respect of our properties and such taxes may increase as our properties are reassessed by taxing authorities or as property tax rates change. An increase in the assessed value of our properties or our property tax rates could adversely impact our financial condition, results of operations and our ability to satisfy our debt service obligations and to pay dividends and distributions to our security holders.

We face potential conflicts of interest.

There are potential conflicts of interest between us and Stephen L. Green.

There is a potential conflict of interest relating to the disposition of certain property contributed to us by Stephen L. Green and affiliated entities in our initial public offering. Mr. Green serves as a member and as the chairman emeritus of our board of directors. If we sell a property in a transaction in which a taxable gain is recognized, for tax purposes the built-in gain would be allocated solely to him and not to us. As a result, Mr. Green has a conflict of interest if the sale of a property he contributed is in our best interest but not his.

In addition, Mr. Green's tax basis includes his share of debt, including mortgage indebtedness, owed by the Operating Partnership. If the Operating Partnership were to retire such debt, then he would experience a decrease in his share of liabilities, which, for tax purposes, would be treated as a distribution of cash to him. To the extent the deemed distribution of cash exceeded his tax basis, he would recognize gain. As a result, Mr. Green has a conflict of interest if the refinancing of indebtedness is in our best interest but not his.

Members of management may have a conflict of interest over whether to enforce terms of agreements with entities which Mr. Green, directly or indirectly, has an affiliation.

Alliance Building Services, or Alliance, and its affiliates are partially owned by Gary Green, a son of Stephen L. Green, who serves as a member and as the chairman emeritus of our board of directors, and provide services to certain properties owned by us. Alliance’s affiliates include First Quality Maintenance, L.P., or First Quality, Classic Security LLC, Bright Star Couriers LLC and Onyx Restoration Works, and provide cleaning, extermination, security, messenger, and restoration services, respectively. In addition, First Quality has the non-exclusive opportunity to provide cleaning and related services to individual tenants at our properties on a basis separately negotiated with any tenant seeking such additional services. The Service Corporation has entered into an arrangement with Alliance whereby it will receive a profit participation above a certain threshold for services provided by Alliance to certain tenants at certain buildings above the base services specified in their lease agreements.

Our company and our tenants accounted for 24.89% of Alliance's 2018 estimated total revenue, based on information provided to us by Alliance. While we believe that the contracts pursuant to which these services are provided were the result of arm's length negotiations, there can be no assurance that the terms of such agreements, or dealings between the parties during the performance

21

of such agreements, will be as favorable to us as those which could be obtained from unaffiliated third parties providing comparable services under similar circumstances.

SL Green's failure to qualify as a REIT would be costly and would have a significant effect on the value of our securities.

We believe we have operated in a manner for SL Green to qualify as a REIT for federal income tax purposes and intend to continue to so operate. Many of the REIT compliance requirements, however, are highly technical and complex. The determination that SL Green is a REIT requires an analysis of factual matters and circumstances. These matters, some of which are not totally within our control, can affect SL Green's qualification as a REIT. For example, to qualify as a REIT, at least 95% of our gross income must come from designated sources that are listed in the REIT tax laws. We are also required to distribute to stockholders at least 90% of our REIT taxable income excluding capital gains. The fact that we hold our assets through the Operating Partnership and its subsidiaries further complicates the application of the REIT requirements. Even a technical or inadvertent mistake could jeopardize our REIT status. Furthermore, Congress and the Internal Revenue Service, or the IRS, might make changes to the tax laws and regulations that make it more difficult, or impossible, for us to remain qualified as a REIT.

If SL Green fails to qualify as a REIT, the funds available for distribution to our stockholders would be substantially reduced as we would not be allowed a deduction for dividends paid to our stockholders in computing our taxable income and would be subject to federal income tax at regular corporate rates and possibly increased state and local taxes.

Also, unless the IRS grants us relief under specific statutory provisions, SL Green would remain disqualified as a REIT for four years following the year in which SL Green first failed to qualify. If SL Green failed to qualify as a REIT, SL Green would have to pay significant income taxes and would therefore have less money available for investments, to service debt obligations or to pay dividends and distributions to security holders. This would have a significant adverse effect on the value of our securities. In addition, the REIT tax laws would no longer obligate us to make any distributions to stockholders. As a result of all these factors, if SL Green fails to qualify as a REIT, this could impair our ability to expand our business and raise capital.

Changes to U.S. federal income tax laws could materially and adversely affect us and our stockholders.

The Tax Cuts and Jobs Act (the ‘‘Tax Act’’) signed into law on December 22, 2017, made substantial changes to the Code. Among those changes are a significant permanent reduction in the generally applicable corporate tax rate, changes in the taxation of individuals and other non-corporate taxpayers that generally but not universally reduce their taxes on a temporary basis subject to ‘‘sunset’’ provisions, the elimination or modification of various currently allowed deductions (including substantial limitations on the deductibility of interest and, in the case of individuals, the deduction for personal state and local taxes), and preferential rates of taxation on most ordinary REIT dividends and certain business income derived by non-corporate taxpayers in comparison to other ordinary income recognized by such taxpayers. The Tax Act also imposes certain additional limitations on the deduction of net operating losses, which may in the future cause us to be required to make distributions that will be taxable to our stockholders to the extent of our current or accumulated earnings and profits in order to comply with the annual REIT distribution requirements. The effect of these, and the many other, changes made in the Tax Act is highly uncertain, both in terms of their direct effect on the taxation of an investment in our common stock and their indirect effect on the value of our assets or market conditions generally. Furthermore, many of the provisions of the Tax Act will require guidance through the issuance of Treasury regulations in order to assess their effect. There may be a substantial delay before such regulations are promulgated, increasing the uncertainty as to the ultimate effect of the statutory amendments on us. Technical corrections to the Tax Act were proposed in 2018, and additional corrections may be proposed in 2019, the effect of which cannot be predicted and may be adverse to us or our stockholders.

Additionally, the rules dealing with U.S. federal income taxation are continually under review by Congress, the IRS, and the U.S. Department of the Treasury. Any such changes could have an adverse effect on an investment in our shares or on the market value or the resale potential of our assets.

Loss of our key personnel could harm our operations and our stock price.

We are dependent on the efforts of Marc Holliday, our chairman and chief executive officer, and Andrew W. Mathias, our president. These officers have employment agreements which expire in January 2022 and December 2021, respectively. A loss of the services of either of these individuals could adversely affect our operations and could be negatively perceived by the market resulting in a decrease in our stock price.

Our business and operations would suffer in the event of system failures or cyber security attacks.

Despite system redundancy, the implementation of security measures and the existence of a disaster recovery plan for our internal information technology systems, our systems are vulnerable to a number of risks including energy blackouts, natural disasters, terrorism, war, telecommunication failures and cyber attacks and intrusions, such as computer viruses, malware, attachments to e-mails, intrusion and unauthorized access, including from persons inside our organization or from persons outside our organization with access to our systems. The risk of a security breach or disruption, particularly through cyber attacks and intrusions, including by computer hackers, foreign governments and cyber terrorists, has generally increased as the number, intensity and sophistication of attempted attacks and instructions from around the world have increased. Our systems are critical

22

to the operation of our business and any system failure, accident or security breach that causes interruptions in our operations could result in a material disruption to our business. We may also incur additional costs to remedy damages caused by such disruptions. Although we make efforts to maintain the security and integrity of our systems and have implemented various measures to manage the risk of a security breach or disruption, there can be no assurance that our security efforts and measures will be effective or that attempted security breaches or disruptions would not be successful or damaging. Any compromise of our security could also result in a violation of applicable privacy and other laws, significant legal and financial exposure, damage to our reputation, loss or misuse of the information (which may be confidential, proprietary and/or commercially sensitive in nature) and a loss of confidence in our security measures, which could harm our business.

Forward-looking statements may prove inaccurate.

See Item 7, "Management's Discussion and Analysis of Financial Condition and Results of Operations—Forward-looking Information," for additional disclosure regarding forward-looking statements.

ITEM 1B.    UNRESOLVED STAFF COMMENTS

As of December 31, 2018, we did not have any unresolved comments with the staff of the SEC.

23

ITEM 2.    PROPERTIES

Our Portfolio

General

As of December 31, 2018, we owned or held interests in 20 consolidated commercial office buildings encompassing approximately 12.4 million rentable square feet and 10 unconsolidated commercial office buildings encompassing approximately 11.3 million rentable square feet located primarily in midtown Manhattan. Many of these buildings include some amount of retail space on the lower floors, as well as basement/storage space. As of December 31, 2018, our portfolio also included ownership interests in 13 consolidated commercial office buildings encompassing approximately 2.3 million rentable square feet and no unconsolidated commercial office buildings encompassing approximately no rentable square feet located outside of Manhattan. We refer to these buildings as our Suburban properties. Some of these buildings also include a small amount of retail space on the lower floors, as well as basement/storage space.

As of December 31, 2018, we also owned investments in 17 prime retail properties encompassing approximately 0.7 million square feet, eight buildings in some stage of development or redevelopment encompassing approximately 0.8 million square feet, 12 residential buildings encompassing 3,058 units (approximately 2.6 million square feet). In addition, we manage two office buildings owned by third parties encompassing approximately 2.1 million square feet and held debt and preferred equity investments with a book value of $2.1 billion including $0.1 billion of investments recorded in balance sheet line items other than the Debt and Preferred Equity Investments line item.

The following tables set forth certain information with respect to each of the Manhattan and Suburban office, prime retail, residential, development and redevelopment properties and land interest in the portfolio as of December 31, 2018:

Manhattan Properties	Year Built/ Renovated	City/ Town	Approximate Rentable Square Feet	Percent of Portfolio Rentable Square Feet	Percent Occupied (1)	Annualized Cash Rent (2)		Percent of Portfolio Annualized Cash Rent (3)	Number of Tenants	Annualized Cash Rent per Leased Square Foot (4)
CONSOLIDATED OFFICE PROPERTIES
"Same Store"
30 East 40th Street—60.00%	1927	Grand Central South	69,446	0.3%	94.3%	$	5,082,192	0.2%	56	$	73.03
100 Church Street	1959/2010	Downtown	1,047,500	4.0	99.6	46,140,850		3.6	17	42.06
110 East 42nd Street	1921	Grand Central	215,400	0.8	79.2	10,170,723		0.8	25	59.28
110 Greene Street—90.00%	1908/1920	Soho	223,600	0.9	77.3	13,933,096		1.0	59	82.5
125 Park Avenue	1923/2006	Grand Central	604,245	2.3	99.5	42,560,593		3.3	26	66.96
220 East 42nd Street	1929	Grand Central	1,135,000	4.4	88.8	62,561,274		4.8	36	59.02
304 Park Avenue South	1930	Midtown South	215,000	0.8	100.0	16,810,271		1.3	11	78.49
420 Lexington Ave (Graybar)	1927/1999	Grand Central North	1,188,000	4.6	95.7	84,218,281		6.5	200	59.89
461 Fifth Avenue (5)	1988	Midtown	200,000	0.8	79.0	14,739,342		1.1	10	91.27
485 Lexington Avenue	1956/2006	Grand Central North	921,000	3.5	81.0	54,815,200		4.2	29	72.09
555 West 57th Street	1971	Midtown West	941,000	3.6	99.9	43,578,630		3.4	9	43.07
625 Madison Avenue	1956/2002	Plaza District	563,000	2.2	98.8	63,714,420		4.9	25	110.3
635 Sixth Avenue	1902	Midtown South	104,000	0.4	100.0	9,810,351		0.8	2	104.04
641 Sixth Avenue	1902	Midtown South	163,000	0.6	100.0	14,960,424		1.2	6	88.21
711 Third Avenue—50.00%(6)	1955	Grand Central North	524,000	2.0	93.7	34,182,575		2.6	21	62.36
750 Third Avenue	1958/2006	Grand Central North	780,000	3.0	98.0	49,234,111		3.8	30	61.28
810 Seventh Avenue	1970	Times Square	692,000	2.7	97.6	48,957,570		3.8	51	67.68
1185 Avenue of the Americas	1969	Rockefeller Center	1,062,000	4.1	85.5	87,029,341		6.7	13	93.25
1350 Avenue of the Americas	1966	Rockefeller Center	562,000	2.2	89.8	41,452,041		3.3	38	78.16
1 Madison Avenue	1960/2002	Park Avenue South	1,176,900	4.5	100.0	74,901,661		5.8	2	63.28
Subtotal / Weighted Average			12,387,091	47.7%	93.7%	$	818,852,946	63.1%	666
Total / Weighted Average Manhattan Consolidated Office Properties			12,387,091	47.7%	93.7%	$	818,852,946	63.1%	666

24

Manhattan Properties	Year Built/ Renovated	City/ Town	Approximate Rentable Square Feet	Percent of Portfolio Rentable Square Feet	Percent Occupied (1)	Annualized Cash Rent (2)		Percent of Portfolio Annualized Cash Rent (3)	Number of Tenants	Annualized Cash Rent per Leased Square Foot (4)
UNCONSOLIDATED OFFICE PROPERTIES
"Same Store"
100 Park Avenue—50.00%	1950/1980	Grand Central South	834,000	3.2%	90.0%	$	62,880,533	2.4%	33	$	78.15
280 Park Avenue—50.00%	1961	Park Avenue	1,219,158	4.7	89.5	112,778,340		4.4	37	97.95
521 Fifth Avenue—50.50%	1929/2000	Grand Central	460,000	1.8	94.7	32,039,489		1.3	43	68.65
800 Third Avenue—60.50%	1972/2006	Grand Central North	526,000	2.0	93.1	36,081,540		1.7	43	69.46
919 Third Avenue—51.00%	1970	Grand Central North	1,454,000	5.6	100.0	98,481,218		3.9	9	65.78
Added to Same Store in 2018
10 East 53rd Street— 55.00%	1972/2014	Plaza District	354,300	1.4	83.7	29,345,917		1.2	38	92.98
11 Madison Avenue—60.00%	1929	Park Avenue South	2,314,000	8.9	100.0	159,122,606		7.4	11	69.74
Subtotal / Weighted Average			7,161,458	27.6%	95.4%	$	530,729,643	22.3%	214
"Non Same Store"
2 Herald Square—51.00%	1909	Herald Square	369,000	1.4%	73.4%	$	26,488,392	1.0%	3	99.85
1515 Broadway—57.00%	1972	Times Square	1,750,000	6.7	98.5	135,246,619		6.0	13	73.66
World Wide Plaza—24.35%	1989/2013	Westside	2,048,725	7.8	96.9	136,411,188		2.6	25	68.84
Subtotal / Weighted Average			4,167,725	15.9%	95.5%	$	298,146,199	9.6%	41
Total / Weighted Average Unconsolidated Office Properties			11,329,183	43.5%	95.4%	$	828,875,842	31.9%	255
Manhattan Office Grand Total / Weighted Average			23,716,274	91.2%	94.5%	$	1,647,728,788	95.0%	921
Manhattan Office Grand Total—SLG share of Annualized Rent						$	1,226,920,486	95.0%
Manhattan Office Same Store Occupancy %—Combined			19,548,549	82.4%	94.3%

25

Suburban Properties	Year Built/ Renovated	City/ Town	Approximate Rentable Square Feet	Percent of Portfolio Rentable Square Feet	Percent Occupied (1)	Annualized Cash Rent (2)		Percent of Portfolio Annualized Cash Rent (3)	Number of Tenants	Annualized Cash Rent per Leased Square Foot (4)
CONSOLIDATED OFFICE PROPERTIES
"Same Store" Westchester, NY
100 Summit Lake Drive	1988	Valhalla	250,000	1.0	97.5%	6,334,440		0.5	15	$	26.35
200 Summit Lake Drive	1990	Valhalla	245,000	0.9	86.1%	5,480,904		0.4	7	26.8
500 Summit Lake Drive	1986	Valhalla	228,000	0.9	99.9%	6,136,920		0.5	8	28.72
360 Hamilton Avenue	2000	White Plains	384,000	1.5	100.0%	15,465,022		1.2	22	40.45
Westchester, NY Subtotal/Weighted Average			1,107,000	4.3%	96.3%	$	33,417,286	2.6%	52
"Same Store" Connecticut
Landmark Square	1973-1984	Stamford	862,800	3.3%	86.3%	$	22,272,451	1.7%	118	$	35.55
1055 Washington Boulevard	1987	Stamford	182,000	0.7	85.5	5,812,236		0.4	24	36.48
1010 Washington Boulevard	1988	Stamford	143,400	0.5	89.7	4,394,376		0.4	27	32.97
Connecticut Subtotal/Weighted Average			1,188,200	4.5%	86.6%	$	32,479,063	2.5%	169
Total / Weighted Average Consolidated Office Properties			2,295,200	8.8%	91.3%	$	65,896,349	5.1%	221
Suburban Grand Total / Weighted Average			2,295,200	8.8%	91.3%	$	65,896,349		221
Suburban Office Grand Total—SLG share of Annualized Rent						$	65,896,341	5.1%
Suburban Office Same Store Occupancy %—Combined			2,295,200	100.0%	91.3%
Portfolio Office Grand Total			26,011,474	100.0%		$	1,713,625,137		1,138
Portfolio Office Grand Total—SLG Share of Annualized Rent						$	1,292,816,827	100.1%

	Year Built/ Renovated	City/ Town	Approximate Rentable Square Feet	Percent of Portfolio Rentable Square Feet	Percent Occupied (1)	Annualized Cash Rent (2)		Percent of Portfolio Annualized Cash Rent (3)	Number of Tenants	Annualized Cash Rent per Leased Square Foot (4)
PRIME RETAIL
"Same Store" Prime Retail
11 West 34th Street—30.00%	1920/2010	Herald Square/Penn Station	17,150	2.3%	100.0%	$	2,946,216	1.0%	1	$	264.23
21 East 66th Street—32.28%	1921	Plaza District	13,069	1.8	100.0	3,586,889		1.3	1	590.63
121 Greene Street—50.00%	1887	Soho	7,131	1.0	100.0	1,620,276		0.9	2	227.22
131-137 Spring Street—20.00%	1915	SoHo	68,342	9.4	96.7	13,752,735		3.1	9	203.07
315 West 33rd Street—The Olivia	2000	Penn Station	270,132	37.0	100.0	17,695,595		20.1	10	64.2
717 Fifth Avenue—10.92%	1958/2000	Midtown/Plaza District	119,550	16.4	100.0	50,663,334		6.3	6	409.62
752 Madison Avenue	1996/2012	Plaza District	21,124	2.9	100.0	15,051,768		17.1	1	712.54
762 Madison Avenue—90.00%	1910	Plaza District	6,109	0.8	100.0	1,891,484		1.9	5	289.75
Williamsburg Terrace	2010	Brooklyn, New York	52,000	7.1	100.0	1,801,412		2.0	3	34.62
Added to Same Store in 2018
115 Spring Street	1900	SoHo	5,218	0.7	100.0	3,406,360		3.9	1	556.42
1552-1560 Broadway—50.00%	1926/2014	Times Square	57,718	7.9	88.3	27,502,653		15.6	3	636.71
Subtotal/Weighted Average			637,543	87.3%	98.6%	$	139,918,722	73.2%	42
"Non Same Store" Prime Retail
133 Greene Street	1900	SoHo	6,425	0.9%	100.0%	$	590,043	0.7%	1	$	91.84

26

650 Fifth Avenue— 50.00%	1977-1978	Plaza District	69,214	9.5	100.0	33,190,000		18.9	1	479.53
712 Madison Avenue	1900/1980	Plaza District	6,600	0.9	100.0	3,392,123		3.8	1	513.96
719 Seventh Avenue—75.00%	1927	Times Square	10,040	1.4	100.0	4,000,000		3.4	1	0398.41
Subtotal/Weighted Average			92,279	12.7%	100.0%	$	41,172,166	26.8%	4
Total / Weighted Average Prime Retail Properties			729,822	100.0%	98.8%	$	181,090,888	100.0%	46
DEVELOPMENT/REDEVELOPMENT
One Vanderbilt(7)	N/A	Grand Central	—	—%	—%	$	—	—%	—	$	—
19-21 East 65th Street	1928-1940	Plaza District	23,610	2.8	18.0	135,851		0.5	5	33.96
185 Broadway	1921	Lower Manhattan	259,856	31.2	—	—		—	—	—
562 Fifth Avenue	1920	Plaza District	42,635	5.1	100.0	3,999,996		13.6	1	93.82
609 Fifth Avenue	1925/1990	Rockefeller Center	160,000	19.2	96.0	20,123,601		68.1	2	123.85
55 West 46th Street—25.00%	2009	Midtown	347,000	41.6	72.1	21,031,366		17.8	12	92.12
1640 Flatbush Avenue	1966	Brooklyn, New York	1,000	0.1	—	—		—	—	—
Total / Weighted Average Development/Redevelopment Properties			834,101	100.0%	54.0%	$	45,290,814	100.0%	20

		Useable Sq. Feet	Total Units	Percent Occupied (1)		Annualized Cash Rent (2)		Average Monthly Rent Per Unit
RESIDENTIAL
"Same Store" Residential
315 West 33rd Street	Penn Station	222,855	333	96.1	%	$	16,306,174	$	4,260
400 East 57th Street—41.00%	Upper East Side	290,482	263	92.8		12,529,767		3,716
400 East 58th Street—90.00%	Upper East Side	140,000	126	95.2		5,754,981		3,626
1080 Amsterdam - 92.50%	Upper West Side	82,250	97	94.8		4,767,058		4,075
Stonehenge Portfolio		938,911	1,064	95.2		59,815,455		4,301
Added to Same Store
605 West 42nd Street—20.00%	Midtown West	927,358	1,175	86.0	%	$	52,183,260	$	3,799
Subtotal/Weighted Average		2,601,856	3,058	91.5	%	$	151,356,695	$	4,028
Total / Weighted Average Residential Properties		2,601,856	3,058	91.5	%	$	151,356,695	$	4,028

(1) Excludes leases signed but not yet commenced as of December 31, 2018.

(2) Annualized Cash Rent represents the monthly contractual rent under existing leases as of December 31, 2018 multiplied by 12. This amount reflects total rent before any rent abatements and includes expense reimbursements, which may be estimated as of such date. Total rent abatements for leases in effect as of December 31, 2018 for the 12 months ending December 31, 2019 would reduce cash rent by $56.5 million for our consolidated properties and $124.3 million for our unconsolidated properties.

(3) Includes our share of unconsolidated joint venture annualized cash rent.

(4) Annualized Cash Rent Per Leased Square Foot represents Annualized Cash Rent, as described in footnote (1) above, presented on a per leased square foot basis.

(5) The Company has an option to acquire the fee interest for a fixed price on a specific date.

(6) The Company owns 50% of the fee interest.

(7) The 1.7 million gross square foot project, which is anticipated to be completed in the third quarter of 2020, has a total development budget, including land mark-up, of $3.17 billion excluding fees paid to the Company and up to $50.0 million in discretionary owner contingencies. As of December 31, 2018, $1.58 billion of the budget remains to be spent, comprised of $200.6 million of partners’ equity, and $1.38 billion of financing available under the project’s construction facility.

27

Historical Occupancy

Historically we have achieved consistently higher occupancy rates in our Manhattan portfolio as compared to the overall midtown Manhattan market, as shown over the last five years in the following table:

	Leased Occupancy Rate of Manhattan Operating Portfolio(1)		Occupancy Rate of Class A Office Properties in the Midtown Manhattan Markets(2)(3)		Occupancy Rate of Class B Office Properties in the Midtown Manhattan Markets(2)(3)
December 31, 2018	94.5	%	91.1	%	89.4	%
December 31, 2017	93.8	%	90.5	%	90.3	%
December 31, 2016	94.9	%	90.0	%	92.2	%
December 31, 2015	94.2	%	90.9	%	91.3	%
December 31, 2014	95.3	%	89.4	%	91.6	%

(1) Includes leases signed but not yet commenced as of the relevant date in our wholly-owned and joint venture properties.

(2) Includes vacant space available for direct lease and sublease. Source: Cushman & Wakefield.

(3) The term "Class B" is generally used in the Manhattan office market to describe office properties that are more than 25 years old but that are in good physical condition, enjoy widespread acceptance by high-quality tenants and are situated in desirable locations in Manhattan. Class B office properties can be distinguished from Class A properties in that Class A properties are generally newer properties with higher finishes and frequently obtain the highest rental rates within their markets.

Lease Expirations

Leases in our Manhattan portfolio, as at many other Manhattan office properties, typically have an initial term of seven to fifteen years, compared to typical lease terms of five to ten years in other large U.S. office markets. For the five years ending December 31, 2023, the average annual lease expirations at our Manhattan consolidated and unconsolidated operating properties is expected to be approximately 1.3 million square feet and approximately 0.5 million square feet, respectively, representing an average annual expiration rate of approximately 10.3% and approximately 4.1%, respectively, per year (assuming no tenants exercise renewal or cancellation options and there are no tenant bankruptcies or other tenant defaults).

The following tables set forth a schedule of the annual lease expirations at our Manhattan consolidated and unconsolidated operating properties, respectively, with respect to leases in place as of December 31, 2018 for each of the next ten years and thereafter (assuming that no tenants exercise renewal or cancellation options and that there are no tenant bankruptcies or other tenant defaults):

Manhattan Consolidated Operating Properties Year of Lease Expiration	Number of Expiring Leases(1)	Square Footage of Expiring Leases	Percentage of Total Leased Square Feet		Annualized Cash Rent of Expiring Leases(2)		Percentage of Annualized Cash Rent of Expiring Leases		Annualized Cash Rent Per Leased Square Foot of Expiring Leases(3)
2019(4)	81	888,091	7.3	%	$	68,264,877	8.4	%	$	76.87
2020(5)	92	2,272,494	18.6	%	152,163,212		18.7		66.96
2021	105	1,191,293	9.8	%	72,109,224		8.9		60.53
2022	90	1,048,783	8.6	%	72,400,832		8.9		69.03
2023	73	853,016	7.0	%	52,668,025		6.5		61.74
2024	35	299,349	2.5	%	21,359,670		2.6		71.35
2025	36	554,077	4.5	%	53,524,504		6.6		96.60
2026	30	788,512	6.5	%	51,612,141		6.4		65.46
2027	38	578,686	4.7	%	44,650,725		5.5		77.16
2028 & thereafter	91	3,743,016	30.5	%	223,926,495		27.5		59.83
Total/weighted average	671	12,217,317	100.0	%	$	812,679,705	100.0	%	$	66.52

(1) Tenants may have multiple leases.

(2) Annualized Cash Rent of Expiring Leases represents the monthly contractual rent for December 2018 under existing leases as of December 31, 2018 multiplied by 12. This amount reflects total rent before any rent abatements and includes expense reimbursements, which may be estimated as of such date. Total rent abatements for leases in effect as of December 31, 2018 for the 12 months ending December 31, 2019 will reduce cash rent by $54.0 million for the properties.

28

(3) Annualized Cash Rent Per Leased Square Foot of Expiring Leases represents Annualized Cash Rent of Expiring Leases, as described in footnote (2) above, presented on a per leased square foot basis.

(4) Includes approximately 22,898 square feet and annualized cash rent of $1.5 million occupied by month-to-month holdover tenants whose leases expired prior to December 31, 2018.

(5) Includes 1,146,881 square feet and annualized cash rent of $72.6 million attributable to leases with Credit Suisse at 1 Madison Avenue that expire in December 2020. The Company has stated that it intends to redevelop this property upon the expiration of these leases.

Manhattan Unconsolidated Operating Properties Year of Lease Expiration	Number of Expiring Leases(1)	Square Footage of Expiring Leases	Percentage of Total Leased Square Feet		Annualized Cash Rent of Expiring Leases(2)		Percentage of Annualized Cash Rent of Expiring Leases		Annualized Cash Rent Per Leased Square Foot of Expiring Leases(3)
2019(4)	30	376,481	3.4	%	$	30,638,858	3.7	%	$	81.38
2020	23	249,004	2.2		17,756,290		2.1		71.31
2021	32	932,426	8.4		69,555,534		8.4		74.60
2022	33	348,017	3.1		39,195,339		4.7		112.62
2023	18	459,849	4.1		38,188,805		4.6		83.05
2024	24	1,031,059	9.3		101,559,921		12.3		98.50
2025	12	497,458	4.5		39,844,313		4.8		80.10
2026	17	480,419	4.3		49,691,923		6.0		103.43
2027	17	310,167	2.8		26,193,603		3.2		84.45
2028 & thereafter	55	6,434,692	57.9		416,251,258		50.2		64.69
Total/weighted average	261	11,119,572	100.0	%	$	828,875,844	100.0	%	$	74.54

(1) Tenants may have multiple leases.

(2) Annualized Cash Rent of Expiring Leases represents the monthly contractual rent for December 2018 under existing leases as of December 31, 2018 multiplied by 12. This amount reflects total rent before any rent abatements and includes expense reimbursements, which may be estimated as of such date. Total rent abatements for leases in effect as of December 31, 2018 for the 12 months ending December 31, 2019 will reduce cash rent by $124.3 million for the joint venture properties.

(3) Annualized Cash Rent Per Leased Square Foot of Expiring Leases represents Annualized Cash Rent of Expiring Leases, as described in footnote (2) above, presented on a per leased square foot basis.

(4) Includes approximately 16,730 square feet and annualized cash rent of $1.5 million occupied by month-to-month holdover tenants whose leases expired prior to December 31, 2018.

29

Leases in our Suburban portfolio, as at many other suburban office properties, typically have an initial term of five to ten years. For the five years ending December 31, 2023, the average annual lease expirations at our Suburban consolidated operating properties is expected to be approximately 0.2 million square feet representing an average annual expiration rate of approximately 11.5% per year (assuming no tenants exercise renewal or cancellation options and there are no tenant bankruptcies or other tenant defaults).

The following tables set forth a schedule of the annual lease expirations at our Suburban consolidated operating properties, respectively, with respect to leases in place as of December 31, 2018 for each of the next ten years and thereafter (assuming that no tenants exercise renewal or cancellation options and that there are no tenant bankruptcies or other tenant defaults):

Suburban Consolidated Operating Properties Year of Lease Expiration	Number of Expiring Leases(1)	Square Footage of Expiring Leases	Percentage of Total Leased Square Feet		Annualized Cash Rent of Expiring Leases(2)		Percentage of Annualized Cash Rent of Expiring Leases		Annualized Cash Rent Per Leased Square Foot of Expiring Leases(3)
2019(4)	39	318,877	16.3	%	$	10,339,795	15.7	%	$	32.43
2020	37	248,056	12.7		9,125,479		13.8		36.79
2021	38	272,678	13.9		10,079,197		15.3		36.96
2022	28	126,582	6.5		5,004,423		7.6		39.54
2023	25	159,769	8.2		5,631,282		8.5		35.25
2024	8	49,924	2.5		1,634,598		2.5		32.74
2025	9	87,449	4.5		2,945,942		4.5		33.69
2026	16	258,795	13.2		9,313,444		14.1		35.99
2027	5	190,387	9.7		4,852,149		7.4		25.49
2028 & thereafter	16	247,434	12.5		6,970,040		10.6		28.17
Total/weighted average	221	1,959,951	100.0	%	$	65,896,349	100.0	%	$	33.62

(1) Tenants may have multiple leases.

(2) Annualized Cash Rent of Expiring Leases represents the monthly contractual rent under existing leases as of December 31, 2018 multiplied by 12. This amount reflects total rent before any rent abatements and includes expense reimbursements, which may be estimated as of such date. Total rent abatements for leases in effect as of December 31, 2018 for the 12 months ending December 31, 2019 will reduce cash rent by $2.5 million for the properties.

(3) Annualized Cash Rent Per Leased Square Foot of Expiring Leases represents Annualized Cash Rent of Expiring Leases, as described in footnote (2) above, presented on a per leased square foot basis.

(4) Includes approximately 71,273 square feet and annualized cash rent of $2.7 million occupied by month-to-month holdover tenants whose leases expired prior to December 31, 2018.

Tenant Diversification

At December 31, 2018, our Manhattan and Suburban office properties were leased to 1,138 tenants, which are engaged in a variety of businesses, including, but not limited to, professional services, financial services, media, apparel, business services and government/non-profit. The following table sets forth information regarding the leases with respect to the 30 largest tenants in our Manhattan and Suburban office properties, which are not intended to be representative of our tenants as a whole, based on the amount of our share of annualized cash rent as of December 31, 2018:

Tenant Name	Property	Lease Expiration	Total Rentable Square Feet	Annualized Cash Rent		SLG Share of Annualized Cash Rent ($)		% of SLG Share of Annualized Cash Rent (1)		Annualized Rent PSF
Credit Suisse Securities (USA), Inc.	1 Madison Avenue	Dec 2020	1,146,881	$	72,570	$	72,570	5.0	%	$	63.28
	11 Madison Avenue	May 2037	1,265,841	77,495		46,497		3.2	%	61.22
	1055 Washington Blvd	Jan 2022	2,525	94		94		—	%	37.25
			2,415,247	$	150,159	$	119,161	8.2	%	$	62.17
Viacom International, Inc.	1515 Broadway	Jun 2031	1,470,284	92,469		52,707		3.6	%	$	62.89
		Mar 2028	9,106	1,878		1,070		0.1	%	206.22
			1,479,390	$	94,347	$	53,777	3.7	%	$	63.77

30

Ralph Lauren Corporation	625 Madison Avenue	Dec 2019	386,785	31,354		31,354		2.2	%	$	81.06
Sony Corporation	11 Madison Avenue	Jan 2031	578,791	44,357		26,614		1.8	%	$	76.64
Debevoise & Plimpton, LLP	919 Third Avenue	Dec 2021	577,438	46,709		23,822		1.6	%	$	80.89
King & Spalding	1185 Avenue of the Americas	Oct 2025	218,275	20,109		20,109		1.4	%	$	92.13
Visiting Nurse Service of New York	220 East 42nd Street	Sep 2048	308,115	18,933		18,933		1.3	%	$	61.45
The City of New York	100 Church Street	Mar 2034	509,068	$	18,528	$	18,528	1.3	%	$	36.40
	420 Lexington Avenue	Oct 2030	4,077	279		279		0.1	%	68.48
			513,145	$	18,807	$	18,807	1.4	%	$	36.65
Advance Magazine Group, Fairchild Publications	750 Third Avenue	Feb 2021	286,622	14,720		14,720		1.0	%	$	51.36
	485 Lexington Avenue	Feb 2021	52,573	3,654		3,654		0.3	%	69.50
			339,195	$	18,374	$	18,374	1.3	%	$	54.17
Metro-North Commuter Railroad Company	420 Lexington Avenue	Nov 2034	334,654	17,922		17,922		1.2	%	$	53.55
	110 East 42nd Street	Oct 2021	1,840	115		115		—	%	62.64
			336,494	$	18,037	$	18,037	1.2	%	$	53.60
Giorgio Armani Corporation	752-760 Madison Avenue	Dec 2024	21,124	$	15,052	$	15,052	1.0	%	$	712.54
	717 Fifth Avenue	Sep 2022	46,940	22,027		2,401		0.2	%	469.26
	762 Madison Avenue	Dec 2024	1,264	239		215		—	%	188.96
			69,328	$	37,318	$	17,668	1.2	%	$	538.28
News America Incorporated	1185 Avenue of the Americas	Nov 2020	165,086	17,377		17,377		1.2	%	$	105.26
Nike Retail Services, Inc.	650 Fifth Avenue	Jan 2033	69,214	33,190		16,595		1.1	%	$	479.53
C.B.S. Broadcasting, Inc.	555 West 57th Street	Dec 2023	338,527	15,315		15,315		1.1	%	$	45.24
	Worldwide Plaza	Jan 2027	32,598	2,128		518		0.1	%	65.28
			371,125	$	17,443	$	15,833	1.2	%	$	47.00
Omnicom Group, Inc., Cardinia Real Estate	220 East 42nd Street	Apr 2032	231,114	14,749		14,749		1.0	%	$	63.82
	1055 Washington Blvd.	Oct 2028	23,800	863		863		0.1	%	36.25
			254,914	$	15,612	$	15,612	1.1	%	$	61.24
National Hockey League	1185 Avenue of the Americas	Nov 2022	148,217	15,319		15,319		1.1	%	$	103.35
Cravath, Swaine & Moore LLP	Worldwide Plaza	Aug 2024	617,135	62,225		15,152		1.0	%	$	100.83
WME IMG, LLC	304 Park Avenue	Apr 2028	129,313	9,424		9,424		0.6	%	$	72.88
	11 Madison Avenue	Sep 2030	103,426	9,056		5,434		0.4	%	87.56
			232,739	$	18,480	$	14,858	1.0	%	$	79.40
WeWork	609 Fifth Avenue	Apr 2035	138,563	11,224		11,224		0.8	%	$	81.00
	2 Herald Square	Feb 2036	123,633	6,852		3,494		0.2	%	55.42
			262,196	$	18,076	$	14,718	1.0	%	$	68.94
Amerada Hess Corp.	1185 Avenue of the Americas	Dec 2027	167,169	14,555		14,555		1.0	%	$	87.07
Total			9,509,998	$	710,781	$	506,675	35.0	%	$	74.74

31

(1) SLG Share of Annualized Cash Rent includes Manhattan, Suburban, Retail, Residential, and Development / Redevelopment properties.

Environmental Matters

We engaged independent environmental consulting firms to perform Phase I environmental site assessments on our portfolio, in order to assess existing environmental conditions. All of the Phase I assessments met the American Society for Testing and Materials (ASTM) Standard. Under the ASTM Standard, a Phase I environmental site assessment consists of a site visit, an historical record review, a review of regulatory agency data bases and records, and interviews with on-site personnel, with the purpose of identifying potential environmental concerns associated with real estate. These environmental site assessments did not reveal any known environmental liability that we believe will have a material adverse effect on our results of operations or financial condition.

ITEM 3.    LEGAL PROCEEDINGS

As of December 31, 2018, the Company and the Operating Partnership were not involved in any material litigation nor, to management's knowledge, was any material litigation threatened against us or our portfolio which if adversely determined could have a material adverse impact on us.

ITEM 4. MINE SAFETY DISCLOSURES

Not Applicable.

32

PART II

ITEM 5.    MARKET FOR REGISTRANTS' COMMON EQUITY AND RELATED STOCKHOLDER MATTERS AND ISSUER PURCHASES OF EQUITY SECURITIES

SL GREEN REALTY CORP.

Our common stock trades on the New York Stock Exchange, or the NYSE, under the symbol "SLG." On February 25, 2019, the reported closing sale price per share of common stock on the NYSE was $91.18 and there were 391 holders of record of our common stock.

SL GREEN OPERATING PARTNERSHIP, L.P.

At December 31, 2018, there were 4,130,579 units of limited partnership interest of the Operating Partnership outstanding and held by persons other than the Company, which received distributions per unit of the same amount and in the same manner as dividends per share were distributed to common stockholders.

There is no established public trading market for the common units of the Operating Partnership. On February 25, 2019, there were 35 holders of record and 88,489,537 common units outstanding, 84,325,436 of which were held by SL Green.

In order for SL Green to maintain its qualification as a REIT, it must make annual distributions to its stockholders of at least 90% of its taxable income (not including net capital gains). SL Green has adopted a policy of paying regular quarterly dividends on its common stock, and the Operating Partnership has adopted a policy of paying regular quarterly distributions to its common units in the same amount as dividends paid by SL Green. Cash distributions have been paid on the common stock of SL Green and the common units of the Operating Partnership since the initial public offering of SL Green. Distributions are declared at the discretion of the board of directors of SL Green and depend on actual and anticipated cash from operations, financial condition, capital requirements, the annual distribution requirements under the REIT provisions of the Internal Revenue Code and other factors SL Green’s board of directors may consider relevant.

Each time SL Green issues shares of stock (other than in exchange for common units of limited partnership interest of the Operating Partnership, or OP Units, when such OP Units are presented for redemption), it contributes the proceeds of such issuance to the Operating Partnership in return for an equivalent number of units of limited partnership interest with rights and preferences analogous to the shares issued.

ISSUER PURCHASES OF EQUITY SECURITIES

In August 2016, our Board of Directors approved a share repurchase plan under which we can buy up to $1.0 billion of shares of our common stock. The Board of Directors has since authorized threeseparate $500.0 million increases to the size of the share repurchase program in the fourth quarter of 2017, second quarter of 2018, and fourth quarter of 2018, bringing the total program size to $2.5 billion.

At December 31, 2018 repurchases executed under the plan were as follows:

Period	Shares repurchased	Average price paid per share	Cumulative number of shares repurchased as part of the repurchase plan or programs
Year ended 2017	8,342,411	$101.64	8,342,411
First quarter 2018	3,653,928	$97.07	11,996,339
Second quarter 2018	3,479,552	$97.22	15,475,891
Third quarter 2018	252,947	$99.75	15,728,838
Fourth quarter 2018	2,358,484	$93.04	18,087,322

33

SALE OF UNREGISTERED AND REGISTERED SECURITIES; USE OF PROCEEDS FROM REGISTERED SECURITIES

During the year ended December 31, 2018, we issued 160,466 shares of our common stock to holders of units of limited partnership interest in the Operating Partnership upon the redemption of such units pursuant to the partnership agreement of the Operating Partnership. During the years ended December 31, 2017 and 2016, we issued 201,696, and 292,291 shares of our common stock, respectively, to holders of units of limited partnership interest in the Operating Partnership upon the redemption of such units pursuant to the partnership agreement of the Operating Partnership. The issuance of such shares was exempt from registration under the Securities Act, pursuant to the exemption contemplated by Section 4(a)(2) thereof for transactions not involving a public offering. The units were exchanged for an equal number of shares of our common stock.

The following table summarizes information, as of December 31, 2018, relating to our equity compensation plans pursuant to which shares of our common stock or other equity securities may be granted from time to time.

	Number of securities to be issued upon exercise of outstanding options, warrants and rights		Weighted average exercise price of outstanding options, warrants and rights			Number of securities remaining available for future issuance under equity compensation plans (excluding securities reflected in column (a))
Plan category	(a)		(b)			(c)
Equity compensation plans approved by security holders (1)	3,655,400	(2)	$	101.28	(3)	7,086,746	(4)
Equity compensation plans not approved by security holders	—		—			—
Total	3,655,400		$	101.28		7,086,746

(1) Includes our Fourth Amended and Restated 2005 Stock Option and Incentive Plan, Amended 1997 Stock Option and Incentive Plan, as amended, and 2008 Employee Stock Purchase Plan.

(2) Includes (i) 1,137,017 shares of common stock issuable upon the exercise of outstanding options (783,035 of which are vested and exercisable), (ii) 32,250 restricted stock units and 113,492 phantom stock units that may be settled in shares of common stock (113,492 of which are vested), (iii) 2,328,675 LTIP units that, upon the satisfaction of certain conditions, are convertible into common units, which may be presented to us for redemption and acquired by us for shares of our common stock (1,800,827 of which are vested).

(3) Because there is no exercise price associated with restricted stock units, phantom stock units or LTIP units, these awards are not included in the weighted-average exercise price calculation.

(4) Balance is after reserving for shares underlying outstanding restricted stock units, phantom stock units granted pursuant to our Non-Employee Directors' Deferral Program and LTIP Units. The number of securities remaining available consists of shares remaining available for issuance under our 2008 Employee Stock Purchase Plan and Third Amended and Restated 2005 Stock Option and Incentive Plan.

34

ITEM 6.    SELECTED FINANCIAL DATA

The following table sets forth our selected financial data and should be read in conjunction with our Financial Statements and notes thereto included in Item 7, "Management's Discussion and Analysis of Financial Condition and Results of Operations" and Item 8, "Financial Statements and Supplementary Data" in this Form 10-K.

35

SL GREEN REALTY CORP.

	Year Ended December 31,
Operating Data	2018			2017			2016			2015			2014
(in thousands, except per share data)
Total revenue	$	1,227,392		$	1,511,473		$	1,863,981		$	1,662,829		$	1,519,978
Operating expenses	229,347			293,364			312,859			301,624			282,283
Real estate taxes	186,351			244,323			248,388			232,702			217,843
Ground rent	32,965			33,231			33,261			32,834			32,307
Interest expense, net of interest income	208,669			257,045			321,199			323,870			317,400
Amortization of deferred finance costs	12,408			16,498			24,564			27,348			22,377
Depreciation and amortization	279,507			403,320			821,041			560,887			371,610
Loan loss and other investment reserves, net of recoveries	6,839			—			—			—			—
Transaction related costs	1,099			(1,834		)	7,528			11,430			8,707
Marketing, general and administrative	92,631			100,498			99,759			94,873			92,488
Total expenses	1,049,816			1,346,445			1,868,599			1,585,568			1,345,015
Equity in net income from unconsolidated joint ventures	7,311			21,892			11,874			13,028			26,537
Equity in net gain on sale of interest in unconsolidated joint venture/real estate	303,967			16,166			44,009			15,844			123,253
Purchase price and other fair value adjustment	57,385			—			—			40,078			67,446
Gain on sale of real estate, net	(30,757		)	73,241			238,116			175,974			—
Gain (loss) on sale of investment in marketable securities	—			3,262			(83		)	—			3,895
Depreciable real estate reserves and impairment	(227,543		)	(178,520		)	(10,387		)	(19,226		)	—
Loss on early extinguishment of debt	(17,083		)	—			—			(49		)	(32,365		)
Income from continuing operations	270,856			101,069			278,911			302,910			363,729
Discontinued operations	—			—			—			14,549			182,134
Net income	270,856			101,069			278,911			317,459			545,863
Net income attributable to noncontrolling interest in the Operating Partnership	(12,216		)	(3,995		)	(10,136		)	(10,565		)	(18,467		)
Net loss (income) attributable to noncontrolling interests in other partnerships	6			15,701			(7,644		)	(15,843		)	(6,590		)
Preferred unit distributions	(11,384		)	(11,401		)	(11,235		)	(6,967		)	(2,750		)
Net income attributable to SL Green	247,262			101,374			249,896			284,084			518,056
Preferred stock redemption costs	—			—			—			—			—
Perpetual preferred stock dividends	(14,950		)	(14,950		)	(14,950		)	(14,952		)	(14,952		)
Net income attributable to SL Green common stockholders	$	232,312		$	86,424		$	234,946		$	269,132		$	503,104
Net income per common share—Basic	$	2.67		$	0.87		$	2.34		$	2.71		$	5.25
Net income per common share—Diluted	$	2.67		$	0.87		$	2.34		$	2.70		$	5.23
Cash dividends declared per common share	$	3.2875		$	3.1375		$	2.94		$	2.52		$	2.10
Basic weighted average common shares outstanding	86,753			98,571			100,185			99,345			95,774
Diluted weighted average common shares and common share equivalents outstanding	91,530			103,403			104,881			103,734			99,696

36

	As of December 31,
Balance Sheet Data (in thousands)	2018		2017		2016		2015		2014
Commercial real estate, before accumulated depreciation	$	8,513,935	$	10,206,122	$	12,743,332	$	16,681,602	$	14,069,141
Total assets	12,751,358		13,982,904		15,857,787		19,727,646		17,096,587
Mortgages and other loans payable, revolving credit facilities, term loans and senior unsecured notes and trust preferred securities, net	5,541,701		5,855,132		6,481,666		10,275,453		8,178,787
Noncontrolling interests in the Operating Partnership	387,805		461,954		473,882		424,206		496,524
Total equity	5,947,855		6,589,454		7,750,911		7,719,317		7,459,216

	Year Ended December 31,
Other Data (in thousands)	2018		2017		2016		2015		2014
Net cash provided by operating activities(1)	441,537		543,001		644,010		542,691		496,895
Net cash provided by (used in) investing activities(1)	681,662		22,014		1,973,382		(2,151,702	)	(784,710	)
Net cash (used in) provided by financing activities(1)	(1,094,112	)	(684,956	)	(2,736,402	)	1,713,417		379,784
Funds from operations available to all stockholders(2)	605,720		667,294		869,855		661,825		583,036

(1) All periods presented in accordance with ASU2016-18

(2) FFO is a widely recognized non-GAAP financial measure of REIT performance. The Company computes FFO in accordance with standards established by NAREIT, which may not be comparable to FFO reported by other REITs that do not compute FFO in accordance with the NAREIT definition, or that interpret the NAREIT definition differently than the Company does. The revised White Paper on FFO approved by the Board of Governors of NAREIT in April 2002, and subsequently amended, defines FFO as net income (loss) (computed in accordance with GAAP), excluding gains (or losses) from sales of properties and real estate related impairment charges, plus real estate related depreciation and amortization and after adjustments for unconsolidated partnerships and joint ventures.

The Company presents FFO because it considers it an important supplemental measure of the Company’s operating performance and believes that it is frequently used by securities analysts, investors and other interested parties in the evaluation of REITs, particularly those that own and operate commercial office properties. The Company also uses FFO as one of several criteria to determine performance-based bonuses for members of its senior management. FFO is intended to exclude GAAP historical cost depreciation and amortization of real estate and related assets, which assumes that the value of real estate assets diminishes ratably over time. Historically, however, real estate values have risen or fallen with market conditions. Because FFO excludes depreciation and amortization unique to real estate, gains and losses from property dispositions, and real estate related impairment charges, it provides a performance measure that, when compared year over year, reflects the impact to operations from trends in occupancy rates, rental rates, operating costs, and interest costs, providing perspective not immediately apparent from net income. FFO does not represent cash generated from operating activities in accordance with GAAP and should not be considered as an alternative to net income (determined in accordance with GAAP), as an indication of the Company’s financial performance or to cash flow from operating activities (determined in accordance with GAAP) as a measure of the Company’s liquidity, nor is it indicative of funds available to fund the Company’s cash needs, including our ability to make cash distributions

A reconciliation of FFO to net income computed in accordance with GAAP is included in Item 7, of "Management's Discussion and Analysis of Financial Condition and Results of Operations—Funds From Operations."

37

SL GREEN OPERATING PARTNERSHIP, L.P.

	Year Ended December 31,
Operating Data	2018			2017			2016			2015			2014
(in thousands, except per unit data)
Total revenue	$	1,227,392		$	1,511,473		$	1,863,981		$	1,662,829		$	1,519,978
Operating expenses	229,347			293,364			312,859			301,624			282,283
Real estate taxes	186,351			244,323			248,388			232,702			217,843
Ground rent	32,965			33,231			33,261			32,834			32,307
Interest expense, net of interest income	208,669			257,045			321,199			323,870			317,400
Amortization of deferred finance costs	12,408			16,498			24,564			27,348			22,377
Depreciation and amortization	279,507			403,320			821,041			560,887			371,610
Loan loss and other investment reserves, net of recoveries	6,839			—			—			—			—
Transaction related costs	1,099			(1,834		)	7,528			11,430			8,707
Marketing, general and administrative	92,631			100,498			99,759			94,873			92,488
Total expenses	1,049,816			1,346,445			1,868,599			1,585,568			1,345,015
Equity in net income from unconsolidated joint ventures	7,311			21,892			11,874			13,028			26,537
Equity in net gain on sale of interest in unconsolidated joint venture/ real estate	303,967			16,166			44,009			15,844			123,253
Purchase price and other fair value adjustment	57,385			—			—			40,078			67,446
Gain on sale of real estate, net	(30,757		)	73,241			238,116			175,974			—
Gain (loss) on sale of investment in marketable securities	—			3,262			(83		)	—			3,895
Depreciable real estate reserves and impairment	(227,543		)	(178,520		)	(10,387		)	(19,226		)	—
Loss on early extinguishment of debt	(17,083		)	—			—			(49		)	(32,365		)
Income from continuing operations	270,856			101,069			278,911			302,910			363,729
Discontinued operations	—			—			—			14,549			182,134
Net income	270,856			101,069			278,911			317,459			545,863
Net loss (income) attributable to noncontrolling interests in other partnerships	6			15,701			(7,644		)	(15,843		)	(6,590		)
Preferred unit distributions	(11,384		)	(11,401		)	(11,235		)	(6,967		)	(2,750		)
Net income attributable to SLGOP	259,478			105,369			260,032			294,649			536,523
Preferred unit redemption costs	—			—			—			—			—
Perpetual preferred unit distributions	(14,950		)	(14,950		)	(14,950		)	(14,952		)	(14,952		)
Net income attributable to SLGOP common stockholders	$	244,528		$	90,419		$	245,082		$	279,697		$	521,571
Net income per common unit—Basic	$	2.67		$	0.87		$	2.34		$	2.71		$	5.25
Net income per common unit—Diluted	$	2.67		$	0.87		$	2.34		$	2.70		$	5.23
Cash dividends declared per common unit	$	3.2875		$	3.1375		$	2.94		$	2.52		$	2.10
Basic weighted average common units outstanding	91,315			103,127			104,508			103,244			99,288
Diluted weighted average common units and common units equivalents outstanding	91,530			103,403			104,881			103,734			99,696

	As of December 31,
Balance Sheet Data (in thousands)	2018		2017		2016		2015		2014
Commercial real estate, before accumulated depreciation	$	8,513,935	$	10,206,122	$	12,743,332	$	16,681,602	$	14,069,141
Total assets	12,751,358		13,982,904		15,857,787		19,727,646		17,096,587
Mortgages and other loans payable, revolving credit facilities, term loans and senior unsecured notes and trust preferred securities, net	5,541,701		5,855,132		6,481,666		10,275,453		8,178,787
Total capital	5,947,855		6,589,454		7,750,911		7,719,317		7,459,216

38

ITEM 7.    MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

Overview

SL Green Realty Corp., which is referred to as SL Green or the Company, a Maryland corporation, and SL Green Operating Partnership, L.P., which is referred to as SLGOP or the Operating Partnership, a Delaware limited partnership, were formed in June 1997 for the purpose of combining the commercial real estate business of S.L. Green Properties, Inc. and its affiliated partnerships and entities. The Company is a self-managed real estate investment trust, or REIT, engaged in the acquisition, development, ownership, management and operation of commercial and residential real estate properties, principally office properties, located in the New York metropolitan area. Unless the context requires otherwise, all references to "we," "our" and "us" means the Company and all entities owned or controlled by the Company, including the Operating Partnership.

Reckson Associates Realty Corp., or Reckson, and Reckson Operating Partnership, L.P. or ROP, are wholly-owned subsidiaries of the SL Green Realty Corp.

The following discussion related to our consolidated financial statements should be read in conjunction with the financial statements appearing in Item 8 of this Annual Report on Form 10-K.

Leasing and Operating

In 2018, our same-store Manhattan office property occupancy inclusive of leases signed but not commenced, was 95.7% compared to 95.8% in the prior year. We signed office leases in Manhattan encompassing approximately 2.3 million square feet, of which approximately 1.3 million square feet represented office leases that replaced previously occupied space. Our mark-to-market on the signed Manhattan office leases that replaced previously occupied space was 6.5% for 2018.

According to Cushman & Wakefield, leasing activity in Manhattan in 2018 totaled approximately 35.9 million square feet. Of the total 2018 leasing activity in Manhattan, the Midtown submarket accounted for approximately 23.7 million square feet, or approximately 66.0%. Manhattan's overall office vacancy went from 8.9% at December 31, 2017 to 9.2% at December 31, 2018 primarily as a result of increased vacancy in the Downtown submarket partially offset by decreased vacancy in the Midtown submarket. Overall average asking rents in Manhattan increased in 2018 by 0.04% from $72.25 per square foot at December 31, 2017 to $72.28 per square foot at December 31, 2018.

Acquisition and Disposition Activity

Overall Manhattan sales volume increased by 43.5% in 2018 to $32.4 billion as compared to $22.5 billion in 2017. Consistent with our multi-faceted approach to property acquisitions, we were the successful bidder at the foreclosure of the leasehold interest in 2 Herald Square, and accepted equity interests in 1231 Third Avenue, 133 Greene Street, and 712 Madison Avenue in lieu of repayment of the respective mezzanine loans.

We also continued to take advantage of significant interest by both international and domestic institutions and individuals seeking ownership interests in Manhattan properties to sell assets, disposing of a significant volume of properties that were non-core or had more limited growth opportunities, raising efficiently priced capital that was used primarily for share repurchases and debt reduction. During the year, we sold all or part of our interest in 600 Lexington Avenue, 1515 Broadway, 1745 Broadway, 3 Columbus Circle, 2 Herald Square, 115-117 Stevens Avenue, Jericho Plaza, 1-6 International Drive, 175-225 Third Street, 635 Madison Avenue, 724 Fifth Avenue, and the 72nd Street Assemblage for total gross valuations of $5.0 billion

Debt and Preferred Equity

In 2017 and 2018, in our debt and preferred equity portfolio we continued to focus on the origination of financings, typically in the form of mezzanine debt, for owners, acquirers or developers of properties in New York City. This investment strategy provides us with the opportunity to fill a need for additional debt financing, while achieving attractive risk adjusted returns to us on the investments and receiving a significant amount of additional information on the New York City real estate market. The typical investments made by us during 2017 and 2018 were to reputable owners or acquirers which have sizable equity subordinate to our last dollar of exposure. During 2018, our debt and preferred equity activities included purchases and originations, inclusive of advances under future funding obligations, discount and fee amortization, and paid-in-kind interest, net of premium amortization, of $986.0 million, and sales, redemption and participations of $994.9 million.

For descriptions of significant activities in 2018, refer to "Part I, Item 1. Business - Highlights from 2018."

39

Critical Accounting Policies

Our discussion and analysis of financial condition and results of operations is based on our consolidated financial statements, which have been prepared in accordance with accounting principles generally accepted in the United States. The preparation of these financial statements requires us to make estimates and judgments that affect the reported amounts of assets, liabilities, and contingencies as of the date of the financial statements and the reported amounts of revenues and expenses during the reporting periods. We evaluate our assumptions and estimates on an ongoing basis. We base our estimates on historical experience and on various other assumptions that we believe to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities that are not readily apparent from other sources. Actual results may differ from these estimates under different assumptions or conditions. We believe the following critical accounting policies affect our more significant judgments and estimates used in the preparation of our consolidated financial statements.

Investment in Commercial Real Estate Properties

Real estate properties are presented at cost less accumulated depreciation and amortization. Costs directly related to the development or redevelopment of properties are capitalized. Ordinary repairs and maintenance are expensed as incurred; major replacements and betterments, which improve or extend the life of the asset, are capitalized and depreciated over their estimated useful lives.

We recognize the assets acquired, liabilities assumed (including contingencies) and any noncontrolling interests in an acquired entity at their respective fair values on the acquisition date.

We incur a variety of costs in the development and leasing of our properties. After the determination is made to capitalize a cost, it is allocated to the specific component of a project that is benefited. Determination of when a development project is substantially complete and capitalization must cease involves a degree of judgment. The costs of land and building under development include specifically identifiable costs. The capitalized costs include, but are not limited to, pre-construction costs essential to the development of the property, development costs, construction costs, interest costs, real estate taxes, salaries and related costs and other costs incurred during the period of development. We consider a construction project as substantially completed and held available for occupancy upon the completion of tenant improvements, but no later than one year after major construction activity ceases. We cease capitalization on the portions substantially completed and occupied or held available for occupancy, and capitalize only those costs associated with the portions under construction.

On a periodic basis, we assess whether there are any indications that the value of our real estate properties may be other than temporarily impaired or that their carrying value may not be recoverable. A property's value is considered impaired if management's estimate of the aggregate future cash flows (undiscounted) to be generated by the property is less than the carrying value of the property. To the extent impairment has occurred, the loss will be measured as the excess of the carrying amount of the property over the calculated fair value of the property.

We also evaluate our real estate properties for impairment when a property has been classified as held for sale. Real estate assets held for sale are valued at the lower of their carrying value or fair value less costs to sell and depreciation expense is no longer recorded. See Note 4, "Properties Held for Sale and Dispositions."

Investments in Unconsolidated Joint Ventures

We account for our investments in unconsolidated joint ventures under the equity method of accounting in cases where we exercise significant influence over, but do not control, these entities and are not considered to be the primary beneficiary. We consolidate those joint ventures that we control or which are variable interest entities (each, a "VIE") and where we are considered to be the primary beneficiary. In all these joint ventures, the rights of the joint venture partner are both protective as well as participating. Unless we are determined to be the primary beneficiary in a VIE, these participating rights preclude us from consolidating these VIE entities. These investments are recorded initially at cost, as investments in unconsolidated joint ventures, and subsequently adjusted for equity in net income (loss) and cash contributions and distributions. Equity in net income (loss) from unconsolidated joint ventures is allocated based on our ownership or economic interest in each joint venture and includes adjustments related to basis differences that were identified as part of the initial accounting for the investment. When a capital event (as defined in each joint venture agreement) such as a refinancing occurs, if return thresholds are met, future equity income will be allocated at our increased economic interest. We recognize incentive income from unconsolidated real estate joint ventures as income to the extent it is earned and not subject to a clawback feature. Distributions we receive from unconsolidated real estate joint ventures in excess of our basis in the investment are recorded as offsets to our investment balance if we remain liable for future obligations of the joint venture or may otherwise be committed to provide future additional financial support. None of the joint venture debt is recourse to us. The Company has performance guarantees under a master lease at one joint venture. See Note 6, "Investments in Unconsolidated Joint Ventures."

We assess our investments in unconsolidated joint ventures for recoverability, and if it is determined that a loss in value of the investment is other than temporary, we write down the investment to its fair value. We evaluate our equity investments for

40

impairment based on the joint ventures' projected discounted cash flows. We do not believe that the values of any of our equity investments were impaired at December 31, 2018.

We may originate loans for real estate acquisition, development and construction, where we expect to receive some of the residual profit from such projects. When the risk and rewards of these arrangements are essentially the same as an investor or joint venture partner, we account for these arrangements as real estate investments under the equity method of accounting for investments. Otherwise, we account for these arrangements consistent with the accounting for our debt and preferred equity investments.

Revenue Recognition

Rental revenue is recognized on a straight-line basis over the term of the lease. The excess of rents recognized over amounts contractually due pursuant to the underlying leases are included in deferred rents receivable on the consolidated balance sheets. We establish, on a current basis, an allowance for future potential tenant credit losses, which may occur against this account. The balance reflected on the consolidated balance sheets is net of such allowance.

We record a gain on sale of real estate when title is conveyed to the buyer, subject to the buyer's financial commitment being sufficient to provide economic substance to the sale and provided that we have no substantial economic involvement with the buyer.

Interest income on debt and preferred equity investments is accrued based on the contractual terms of the instruments and when, in the opinion of management, it is deemed collectible. Some debt and preferred equity investments provide for accrual of interest at specified rates, which differ from current payment terms. Interest is recognized on such loans at the accrual rate subject to management's determination that accrued interest is ultimately collectible, based on the underlying collateral and operations of the borrower. If management cannot make this determination, interest income above the current pay rate is recognized only upon actual receipt.

Deferred origination fees, original issue discounts and loan origination costs, if any, are recognized as an adjustment to the interest income over the terms of the related investments using the effective interest method. Fees received in connection with loan commitments are also deferred until the loan is funded and are then recognized over the term of the loan as an adjustment to yield.

Debt and preferred equity investments are placed on a non-accrual status at the earlier of the date at which payments become 90 days past due or when, in the opinion of management, a full recovery of interest income becomes doubtful. Interest income recognition on any non-accrual debt or preferred equity investment is resumed when such non-accrual debt or preferred equity investment becomes contractually current and performance is demonstrated to be resumed. Interest is recorded as income on impaired loans only to the extent cash is received.

We may syndicate a portion of the loans that we originate or sell the loans individually. When a transaction meets the criteria for sale accounting, we derecognize the loan sold and recognize gain or loss based on the difference between the sales price and the carrying value of the loan sold. Any related unamortized deferred origination fees, original issue discounts, loan origination costs, discounts or premiums at the time of sale are recognized as an adjustment to the gain or loss on sale, which is included in investment income on the consolidated statement of operations. Any fees received at the time of sale or syndication are recognized as part of investment income.

Asset management fees are recognized on a straight-line basis over the term of the asset management agreement.

Allowance for Doubtful Accounts

We maintain an allowance for doubtful accounts for estimated losses resulting from the inability of our tenants to make required payments. If the financial condition of a specific tenant were to deteriorate, resulting in an impairment of its ability to make payments, additional allowances may be required.

Allowance for loan loss and other investment reserves

The expense for loan loss and other investment reserves in connection with debt and preferred equity investments is the charge to earnings to adjust the allowance for possible losses to the level that we estimate to be adequate, based on Level 3 data, considering delinquencies, loss experience and collateral quality.

The Company evaluates debt and preferred equity investments that are held to maturity for possible impairment or credit deterioration associated with the performance and/or value of the underlying collateral property as well as the financial and operating capability of the borrower/sponsor. Quarterly, the Company assigns each loan a risk rating. Based on a 3-point scale, loans are rated “1” through “3,” from less risk to greater risk, which ratings are defined as follows: 1 - Low Risk Assets - Low probability of loss, 2 - Watch List Assets - Higher potential for loss, 3 - High Risk Assets - Loss more likely than not.

When it is probable that we will be unable to collect all amounts contractually due, the investment is considered impaired. A valuation allowance is measured based upon the excess of the recorded investment amount over the fair value of the collateral.

41

Any deficiency between the carrying amount of an asset and the calculated value of the collateral is charged to expense. We continue to assess or adjust our estimates based on circumstances of a loan and the underlying collateral. If additional information reflects increased recovery of our investment, we will adjust our reserves accordingly.

Debt and preferred equity investments that are classified as held for sale are carried at the lower of cost or fair market value using available market information obtained through consultation with dealers or other originators of such investments as well as discounted cash flow models based on Level 3 data pursuant to ASC 820-10. As circumstances change, management may conclude not to sell an investment designated as held for sale. In such situations, the investment will be reclassified at its net carrying value to debt and preferred equity investments held to maturity. For these reclassified investments, the difference between the current carrying value and the expected cash to be collected at maturity will be accreted into income over the remaining term of the investment.

Derivative Instruments

In the normal course of business, we use a variety of commonly used derivative instruments, such as interest rate swaps, caps, collars and floors, to manage, or hedge, interest rate risk. Effectiveness is essential for those derivatives that we intend to qualify for hedge accounting. Some derivative instruments are associated with an anticipated transaction. In those cases, hedge effectiveness criteria also require that it be probable that the underlying transaction occurs. Instruments that meet these hedging criteria are formally designated as hedges at the inception of the derivative contract.

To determine the fair values of derivative instruments, we use a variety of methods and assumptions that are based on market conditions and risks existing at each balance sheet date. For the majority of financial instruments including most derivatives, long-term investments and long-term debt, standard market conventions and techniques such as discounted cash flow analysis, option pricing models, replacement cost, and termination cost are used to determine fair value. All methods of assessing fair value result in a general approximation of value, and such value may never actually be realized.

42

Reconciliation of Net Income to Same-Store Operating Income

We present Same-Store Operating Income because we believe that this measure, when taken together with the corresponding GAAP financial measures and our reconciliation, provides investors with meaningful information regarding the operating performance of our properties. When operating performance is compared across multiple periods, the investor is provided with information not immediately apparent from net income that is determined in accordance with GAAP. Same-Store Operating Income provides information on trends in the revenue generated and expenses incurred in operating our properties, unaffected by the cost of leverage, depreciation, amortization, and other net income components. We use this metric internally as a performance measure. This measure is not an alternative to net income (determined in accordance with GAAP) and same-store performance should not be considered an alternative to GAAP net income performance. This metric may be defined differently, and may not be comparable, to similarly named metrics used by other companies.

Comparison of the year ended December 31, 2018 to the year ended December 31, 2017

For properties owned since January 1, 2017 and still owned and operated at December 31, 2018, Same-Store Operating Income is determined as follows (in millions):

	Year Ended
	December 31,
(in millions)	2018			2017
Net income	$	270.9		$	101.1
Equity in net gain on sale of interest in unconsolidated joint venture/real estate	(304.0		)	(16.2		)
Purchase price and other fair value adjustment	(57.4		)	—
Loss (gain) on sale of real estate, net	30.8			(73.2		)
Depreciable real estate reserves and impairment	227.5			178.5
Gain on sale of investment in marketable securities	—			(3.3		)
Depreciation and amortization	279.5			403.3
Interest expense, net of interest income	208.7			257.0
Amortization of deferred financing costs	12.4			16.5
Operating income	668.4			863.7
Less: Operating income from other properties/affiliates	(131.3		)	(345.9		)
Same-store operating income	$	537.1		$	517.8

Comparison of the year ended December 31, 2017 to the year ended December 31, 2016

For properties owned since January 1, 2016 and still owned and operated at December 31, 2017, Same-Store Operating Income is determined as follows (in millions):

	Year Ended
	December 31,
(in millions)	2017			2016
Net income	$	101.1		$	278.9
Equity in net gain on sale of interest in unconsolidated joint venture/real estate	(16.2		)	(44.0		)
Gain on sale of real estate, net	(73.2		)	(238.1		)
Depreciable real estate reserves and impairment	178.5			10.4
(Gain) loss on sale of investment in marketable securities	(3.3		)	0.1
Depreciation and amortization	403.3			821.0
Interest expense, net of interest income	257.0			321.2
Amortization of deferred financing costs	16.5			24.6
Operating income	863.7			1,174.1
Less: Operating income from other properties/affiliates	(244.2		)	(556.9		)
Same-store operating income	$	619.5		$	617.2

43

Results of Operations

Comparison of the year ended December 31, 2018 to the year ended December 31, 2017

The following comparison for the year ended December 31, 2018, or 2018, to the year ended December 31, 2017, or 2017, makes reference to the effect of the following:

i. “Same-Store Properties,” which represents all operating properties owned by us at January 1, 2017 and still owned by us in the same manner at December 31, 2018 (Same-Store Properties totaled 40 of our 49 consolidated operating properties),

ii. “Acquisition Properties,” which represents all properties or interests in properties acquired in 2018 and 2017 and all non-Same-Store Properties, including properties that are under development or redevelopment,

iii. "Disposed Properties" which represents all properties or interests in properties sold in 2018 and 2017, and

iv. “Other,” which represents properties where we sold an interest resulting in deconsolidation and corporate level items not allocable to specific properties, as well as the Service Corporation and eEmerge Inc.

	Same-Store								Disposed				Other					Consolidated
(in millions)	2018		2017		$ Change		% Change		2018		2017		2018		2017			2018			2017			$ Change			% Change
Rental revenue	$	832.9	$	816.7	$	16.2	2.0	%	$	8.8	$	62.0	$	23.3	$	222.3		$	865.0		$	1,101.0		$	(236.0	)	(21.4	)%
Escalation and reimbursement	111.9		105.3		6.6		6.3	%	0.9		5.1		0.8		62.5			113.6			172.9			(59.3		)	(34.3	)%
Investment income	—		—		—		—	%	—		—		201.5		193.9			201.5			193.9			7.6			3.9	%
Other income	11.2		4.8		6.4		133.3	%	1.5		3.8		34.6		35.1			47.3			43.7			3.6			8.2	%
Total revenues	956.0		926.8		29.2		3.2	%	11.2		70.9		260.2		513.8			1,227.4			1,511.5			(284.1		)	(18.8	)%
Property operating expenses	418.1		408.5		9.6		2.4	%	5.2		28.0		25.4		134.4			448.7			570.9			(122.2		)	(21.4	)%
Transaction related costs	0.3		—		0.3		—	%	—		—		0.8		(1.8		)	1.1			(1.8		)	2.9			(161.1	)%
Marketing, general and administrative	—		—		—		—	%	—		—		92.6		100.5			92.6			100.5			(7.9		)	(7.9	)%
	418.4		408.5		9.9		2.4	%	5.2		28.0		118.8		233.1			542.4			669.6			(127.2		)	(19.0	)%
Other income (expenses):
Interest expense and amortization of deferred financing costs, net of interest income																		(221.1		)	(273.6		)	52.5			(19.2	)%
Depreciation and amortization																		(279.5		)	(403.3		)	123.8			(30.7	)%
Equity in net income from unconsolidated joint ventures																		7.3			21.9			(14.6		)	(66.7	)%
Equity in net gain on sale of interest in unconsolidated joint venture/real estate																		304.0			16.2			287.8			1,776.5	%
Purchase price and other fair value adjustment																		57.4			—			57.4			—	%
(Loss) gain on sale of real estate, net																		(30.8		)	73.2			(104.0		)	(142.1	)%
Depreciable real estate reserves and impairment																		(227.5		)	(178.5		)	(49.0		)	27.5	%
Gain (loss) on sale of investment in marketable securities																		—			3.3			(3.3		)	(100.0	)%
Loss on early extinguishment of debt																		(17.1		)	—			(17.1		)	—	%
Loan loss and other investment reserves, net of recoveries																		(6.8		)	—			(6.8		)	—	%
Net income																		$	270.9		$	101.1		$	169.8		168.0	%

Rental, Escalation and Reimbursement Revenues

Rental revenues decreased primarily as a result of Disposed Properties ($53.2 million), including the partial sale and deconsolidation of 1515 Broadway, along with the deconsolidation of 919 Third Avenue ($190.6 million). The decrease was partially offset by increased revenue at our Same-Store properties ($16.2 million).

44

Escalation and reimbursement revenue decreased primarily as a result of the partial sale and deconsolidation of 1515 Broadway and the deconsolidation of 919 Third Avenue ($56.3 million), partially offset by higher recoveries at our Same-Store properties ($6.6 million).

The following table presents a summary of the commenced leasing activity for the year endedDecember 31, 2018 in our Manhattan and Suburban portfolio:

	Usable SF		Rentable SF	New Cash Rent (per rentable SF) (1)		Prev. Escalated Rent (per rentable SF) (2)		TI/LC per rentable SF		Free Rent (in months)	Average Lease Term (in years)
Manhattan
Space available at beginning of the year	1,502,238
Property no longer in redevelopment	79,192
Sold Vacancies	(57,385	)
Properties placed in service	67,917
Acquired vacancies	51,583
Property in redevelopment
Space which became available during the year(3)
•       Office	1,009,099
•       Retail	14,692
•       Storage	4,744
	1,028,535
Total space available	2,672,080
Leased space commenced during the year:
•       Office(4)	1,220,716		1,333,727	$	67.20	$	63.32	$	69.17	5.8	14.0
•       Retail	35,125		34,865	$	90.77	$	194.72	$	148.12	9.0	12.2
•       Storage	6,227		7,810	$	28.99	$	25.97	$	—	0.3	5.1
Total leased space commenced	1,262,068		1,376,402	$	67.58	$	65.00	$	70.78	5.9	13.9
Total available space at end of year	1,410,012
Early renewals
•       Office	362,783		423,632	$	79.74	$	73.07	$	30.16	4.6	6.8
•       Retail	34,173		34,015	$	94.04	$	104.44	$	58.80	—	12.9
•       Storage	12,166		12,501	$	6.65	$	6.64	$	—	0.2	6.3
Total early renewals	409,122		470,148	$	78.83	$	73.58	$	31.43	4.2	7.2
Total commenced leases, including replaced previous vacancy
•       Office			1,757,359	$	70.22	$	66.99	$	59.77	5.6	12.3
•       Retail			68,880	$	92.39	$	125.16	$	104.01	4.5	12.5
•       Storage			20,311	$	15.24	$	10.89	$	—	0.3	5.9
Total commenced leases			1,846,550	$	70.44	$	68.39	$	60.76	5.5	12.2

45

	Usable SF		Rentable SF	New Cash Rent (per rentable SF) (1)		Prev. Escalated Rent (per rentable SF) (2)		TI/LC per rentable SF		Free Rent (in months)	Average Lease Term (in years)
Suburban
Space available at beginning of year	655,672
Sold Vacancies	(502,366	)
Space which became available during the year(3)
•       Office	172,144
•       Retail	2,693
•       Storage	4,056
	178,893
Total space available	332,199
Leased space commenced during the year:
•       Office(5)	125,629		124,899	$	33.99	$	36.38	$	19.42	3.1	5.7
•       Retail	2,385		2,685	$	29.60	$	17.00	$	—	5	7.6
•       Storage	1,705		1,816	$	13.74	$	12.36	$	—	—	3.5
Total leased space commenced	129,719		129,400	$	33.61	$	35.84	$	18.74	3.1	5.7
Total available space at end of the year	461,918
Early renewals
•       Office	195,623		197,514	$	28.68	$	31.40	$	24.22	8.3	7.3
•       Retail	50,585		50,585	$	7.64	$	7.66	$	—	9.0	12.2
•       Storage	2,000		2,000	$	11.00	$	11.00	$	—	—	7.6
Total early renewals	248,208		250,099	$	24.29	$	26.43	$	19.13	8.4	8.3
Total commenced leases, including replaced previous vacancy
•       Office			322,413	$	30.74	$	32.78	$	22.36	6.3	6.7
•       Retail			53,270	$	8.74	$	7.80	$	—	8.8	12.0
•       Storage			3,816	$	12.31	$	11.49	$	—	—	5.7
Total commenced leases			379,499	$	27.47	$	28.66	$	18.99	6.6	7.4

(1) Annual initial base rent.

(2) Escalated rent is calculated as total annual income less electric charges.

(3) Includes expiring space, relocating tenants and move-outs where tenants vacated. Excludes lease expirations where tenants held over.

(4) Average starting office rent excluding new tenants replacing vacancies was $72.42 per rentable square feet for 1,127,841 rentable square feet. Average starting office rent for office space (leased and early renewals, excluding new tenants replacing vacancies) was $66.29 per rentable square feet for 629,518 rentable square feet.

(5) Average starting office rent excluding new tenants replacing vacancies was $30.05 per rentable square feet for 217,842 rentable square feet. Average starting office rent for office space (leased and early renewals, excluding new tenants replacing vacancies) was $32.17 per rentable square feet for 104,571 rentable square feet.

Investment Income

Investment income increased primarily as a result of new originations, a larger weighted average book balance, and higher acceleration of previously unrecognized fees as a result of sales, redemptions, modifications or syndications ($1.3 million).

For the year ended December 31, 2018, the weighted average debt and preferred equity investment balance outstanding and weighted average yield were $2.1 billion and 9.0%, respectively. Excluding our investment in Two Herald Square which was put on non-accrual in August 2017, the weighted average debt and preferred equity investment balance outstanding and weighted average yield for the year ended December 31, 2017 were to $1.9 billion and 9.3%, respectively. As of December 31, 2018, the debt and preferred equity investments had a weighted average term to maturity of 1.8 years excluding extension options.

Other Income

Other income increased primarily as a result of fees recognized in connection with the recapitalization of a joint venture property ($5.8 million), real estate tax refunds at our Same-Store Properties ($3.2 million), lease termination income ($2.9 million),

46

and promote income related to the sale of 1274 Fifth Avenue ($2.1 million), partially offset by net fees recognized in connection with the One Vanderbilt joint venture ($8.4 million).

Property Operating Expenses

Property operating expenses decreased primarily as a result of the partial sale and deconsolidation of 1515 Broadway, the deconsolidation of 919 Third Avenue ($103.2 million) and the Disposed Properties ($22.8 million), which was partially offset by increased real estate taxes at our Same-Store Properties ($8.0 million).

Marketing, General and Administrative Expenses

Marketing, general and administrative expenses decreased by $7.9 million to $92.6 million for the year ended December 31, 2018, or 5.2% of total combined revenues, including our share of joint venture revenues, compared to $100.5 million, or 5.3% of total revenues including our share of joint venture revenues, for the year ended December 31, 2017.

Interest Expense and Amortization of Deferred Financing Costs, Net of Interest Income

Interest expense and amortization of deferred financing costs, net of interest income, decreased primarily as a result of the partial sale and deconsolidation of 1515 Broadway ($33.0 million) and the deconsolidation of 919 Third Avenue ($26.5 million). The weighted average consolidated debt balance outstanding was $5.7 billion for the year ended December 31, 2018 as compared to $6.6 billion for the year ended December 31, 2017. The consolidated weighted average interest rate increased to 4.06% for the year ended December 31, 2018 as compared to 4.00% for the year ended December 31, 2017 as a result of an increase in LIBOR.

Depreciation and Amortization

Depreciation and amortization decreased primarily as a result of 185 Broadway which was moved to development ($50.4 million) in the first quarter of 2018, the deconsolidation of 919 Third Avenue, the partial sale and deconsolidation of 1515 Broadway ($60.6 million) and the Disposed Properties ($22.4 million).

Equity in Net Income in Unconsolidated Joint Venture/Real Estate

Equity in net income from unconsolidated joint ventures decreased primarily as a result of the repayment and redemption of certain debt and preferred equity positions accounted for under the equity method ($8.7 million), and the sale of 1745 Broadway in the second quarter of 2018 ($2.9 million), partially offset by the partial sale and deconsolidation of 1515 Broadway and the deconsolidation of 919 Third Avenue ($6.6 million).

Equity in Net Gain on Sale of Interest in Unconsolidated Joint Ventures

During the year ended December 31, 2018, we recognized a gain on sale related to our joint venture interests in 3 Columbus Circle ($160.4 million), 724 Fifth Avenue ($64.6 million), 1745 Broadway ($52.0 million), 175-225 Third Avenue ($19.5 million), 720 Fifth Avenue ($6.3 million) and Jericho Plaza ($0.1 million), and a loss related to the sale of our interest in Stonehenge Village ($5.7 million).

Purchase price and other fair value adjustments

In January 2018, the partnership agreement for our investment in 919 Third Avenue was modified resulting in our partner now having substantive participating rights in the venture and the Company no longer having a controlling interest in the investment. As a result the investment in this property was deconsolidated as of January 1, 2018. The Company recorded its non-controlling interest at fair value resulting in a $49.3 million fair value adjustment in the consolidated statement of operations. This fair value was allocated to the assets and liabilities, including identified intangibles of the property.

In May, 2018, the Company was the successful bidder at the foreclosure of 2 Herald Square, at which time the Company's $250.5 million outstanding principal balance on its debt and preferred equity investment and $7.7 million accrued interest balance receivables were credited to our equity investment in the property. We recorded the assets acquired and liabilities assumed at fair value. This resulted in the recognition of a fair value adjustment of $8.1 million, which is reflected on the Company's consolidated statement of operations within purchase price and other fair value adjustments. This fair value was allocated to the assets and liabilities, including identified intangibles of the property.

(Loss) Gain on Sale of Real Estate, Net

During the year ended December 31, 2018, we recognized a gain on sale related to our interests in 600 Lexington ($23.8 million) and we recognized a loss on sale related to our interest in 300-400 Summit Lake Drive ($36.2 million), 635 Madison ($14.1 million), Reckson Executive Park ($2.6 million) and 115-117 Stevens Avenue ($0.7 million). During the year ended December 31, 2017, we recognized a gain on sale associated with the sale of the property at 16 Court Street ($64.9 million), and the partial sale of the property at 102 Greene Street ($4.9 million). This gain was partially offset by a loss on the sale of 885

47

Third Avenue ($8.8 million) which closed in 2016, but was only recognized in the second quarter of 2017 due to the sale not meeting the criteria for sale accounting under the full accrual method in ASC 360-20 until the second quarter of 2017.

Depreciable Real Estate Reserves and Impairment

During the year ended December 31, 2018, we recorded a charge related to 5 suburban office properties comprised of 13 buildings ($221.9 million), which the company has stated it intends to dispose of, and a charge related to the Upper East Side Residential Assemblage ($5.8 million). During the year ended December 31, 2017, we recorded a $178.5 million of depreciable real estate reserves and impairment related to Reckson Executive Park, Stamford Towers, 125 Chubb Avenue in Lyndhurst, NJ, 115-117 Stevens Avenue in Valhalla, New York, 520 White Plains Road in Tarrytown, NY, and our investment in Jericho Plaza.

Loss on early extinguishment of debt

During the year ended December 31, 2018, we recognized a loss on early extinguishment of debt as a result of the early repayment of the debt at One Madison Avenue ($14.9 million), and the mortgage at 220 East 42nd ($2.2 million).

Loan loss and other investment reserves, net of recoveries

During the year ended December 31, 2018, we recognized a loss related to two of our debt and preferred equity positions ($5.8 million) that are being marketed for sale, and the repayment of an investment pursuant to the sale of a property ($1.1 million).

Comparison of the year ended December 31, 2017 to the year ended December 31, 2016

The following comparison for the year ended December 31, 2017, or 2017, to the year ended December 31, 2016, or 2016, makes reference to the effect of the following: 

i. “Same-Store Properties,” which represents all operating properties owned by us at January 1, 2016 and still owned by us in the same manner at December 31, 2017 (Same-Store Properties totaled 43 of our 60 consolidated operating properties),

ii. “Acquisition Properties,” which represents all properties or interests in properties acquired in 2017 and 2016 and all non-Same-Store Properties, including properties that are under development or redevelopment,

iii. "Disposed Properties" which represents all properties or interests in properties sold in 2017 and 2016, and

iv. “Other,” which represents properties where we sold an interest resulting in deconsolidation and corporate level items not allocable to specific properties, as well as the Service Corporation and eEmerge Inc.

48

	Same-Store									Disposed				Other					Consolidated
(in millions)	2017		2016		$ Change			% Change		2017		2016		2017			2016		2017			2016			$ Change			% Change
Rental revenue	$	961.8	$	942.6	$	19.2		2.0	%	$	121.1	$	360.7	$	18.1		$	20.5	$	1,101.0		$	1,323.8		$	(222.8	)	(16.8	)%
Escalation and reimbursement	131.4		142.0		(10.6		)	(7.5	)%	40.1		52.7		1.4			2.2		172.9			196.9			(24.0		)	(12.2	)%
Investment income	—		—		—			—	%	—		—		193.9			213.0		193.9			213.0			(19.1		)	(9.0	)%
Other income	8.9		6.8		2.1			30.9	%	0.5		94.3		34.3			29.2		43.7			130.3			(86.6		)	(66.5	)%
Total revenues	1,102.1		1,091.4		10.7			1.0	%	161.7		507.7		247.7			264.9		1,511.5			1,864.0			(352.5		)	(18.9	)%
Property operating expenses	482.6		474.2		8.4			1.8	%	65.3		98.7		23.0			21.6		570.9			594.5			(23.6		)	(4.0	)%
Transaction related costs	—		—		—			—	%	—		—		(1.8		)	7.5		(1.8		)	7.5			(9.3		)	(124.0	)%
Marketing, general and administrative	—		—		—			—	%	—		—		100.5			99.8		100.5			99.8			0.7			0.7	%
	482.6		474.2		8.4			1.8	%	65.3		98.7		121.7			128.9		669.6			701.8			(32.2		)	(4.6	)%
Operating income before equity in net income from unconsolidated joint ventures	$	619.5	$	617.2	$	2.3		0.4	%	$	96.4	$	409.0	$	126.0		$	136.0	$	841.9		$	1,162.2		$	(320.3	)	(27.6	)%
Other income (expenses):
Interest expense and amortization of deferred financing costs, net of interest income																			(273.6		)	(345.8		)	72.2			(20.9	)%
Depreciation and amortization																			(403.3		)	(821.0		)	417.7			(50.9	)%
Equity in net income from unconsolidated joint ventures																			21.9			11.9			10.0			84.0	%
Equity in net gain on sale of interest in unconsolidated joint venture/real estate																			16.2			44.0			(27.8		)	(63.2	)%
Gain on sale of real estate, net																			73.2			238.1			(164.9		)	(69.3	)%
Depreciable real estate reserves and impairment																			(178.5		)	(10.4		)	(168.1		)	1,616.3	%
Gain (loss) on sale of investment in marketable securities																			3.3			(0.1		)	3.4			(3,400.0	)%
Net income																			$	101.1		$	278.9		$	(177.8	)	(63.8	)%

Rental, Escalation and Reimbursement Revenues

Rental revenues decreased primarily as a result of Disposed Properties ($239.7 million), which included 388-390 Greenwich Street and the effect of the partial sale and deconsolidation of 11 Madison Avenue in the third quarter of 2016. This decrease was offset by increased rental revenue at Same-Store Properties ($19.1 million), and by 1515 Broadway which, in 2016, recognized accounting write-offs ($17.4 million) related to the space previously leased to Aeropostale following the tenant's bankruptcy.

Escalation and reimbursement revenue decreased primarily as a result of Disposed Properties ($12.7 million) and lower recoveries at our Same-Store properties ($10.6 million).

The following table presents a summary of the commenced leasing activity for the year ended December 31, 2017 in our Manhattan and Suburban portfolio:

49

	Usable SF	Rentable SF	New Cash Rent (per rentable SF) (1)		Prev. Escalated Rent (per rentable SF) (2)		TI/LC per rentable SF		Free Rent (in months)	Average Lease Term (in years)
Manhattan
Space available at beginning of the year	1,149,571
Space which became available during the year(3)
•       Office	1,181,119
•       Retail	29,739
•       Storage	16,594
	1,227,452
Total space available	2,377,023
Leased space commenced during the year:
•       Office(4)	806,688	884,513	$	73.59	$	62.13	$	56.80	4.6	8.2
•       Retail	33,257	63,710	$	297.35	$	251.55	$	37.72	6.5	13.1
•       Storage	34,840	5,560	$	36.32	$	48.86	$	1.92	1.9	7.4
Total leased space commenced	874,785	953,783	$	88.32	$	82.88	$	55.20	4.7	8.5
Total available space at end of year	1,502,238
Early renewals
•       Office	281,039	285,889	$	79.07	$	73.96	$	11.46	1.9	4.5
•       Retail	45,652	35,089	$	73.96	$	50.53	$	2.01	0.1	5.5
•       Storage	2,730	2,817	$	29.44	$	30.52	$	—	1.3	3.2
Total early renewals	329,421	323,795	$	78.09	$	71.04	$	10.34	1.7	4.6
Total commenced leases, including replaced previous vacancy
•       Office		1,170,402	$	74.93	$	66.58	$	45.72	3.9	7.3
•       Retail		98,799	$	218.01	$	176.40	$	25.04	4.2	10.4
•       Storage		8,377	$	34.00	$	38.77	$	1.27	1.7	6.0
Total commenced leases		1,277,578	$	85.73	$	78.42	$	43.83	3.9	7.5

50

	Usable SF		Rentable SF	New Cash Rent (per rentable SF) (1)		Prev. Escalated Rent (per rentable SF) (2)		TI/LC per rentable SF		Free Rent (in months)	Average Lease Term (in years)
Suburban
Space available at beginning of year	965,021
Sold Vacancies	(222,250	)
Properties placed in service	—
Space which became available during the year(3)
•       Office	246,565
•       Retail	1,338
•       Storage	2,866
	250,769
Total space available	993,540
Leased space commenced during the year:
•       Office(5)	334,739		345,633	$	31.62	$	35.13	$	34.99	6.2	7.5
•       Retail	338		338	$	33.00	$	33.00	$	—	—	5.0
•       Storage	2,791		2,858	$	17.42	$	13.92	$	10.13	0.9	4.7
Total leased space commenced	337,868		348,829	$	31.51	$	34.79	$	34.75	6.2	7.5
Total available space at end of the year	655,672
Early renewals
•       Office	181,288		183,331	$	32.21	$	32.86	$	8.05	4.1	4.2
•       Storage	2,213		2,213	$	17.01	$	16.52	$	—	—	4.8
Total early renewals	183,501		185,544	$	32.03	$	32.67	$	7.96	4.0	4.2
Total commenced leases, including replaced previous vacancy
•       Office			528,964	$	31.83	$	33.76	$	25.65	5.5	6.3
•       Retail			338	$	33.00	$	33.00	$	—	—	5.0
•       Storage			5,071	$	17.24	$	15.31	$	5.71	0.5	4.7
Total commenced leases			534,373	$	31.69	$	33.51	$	25.45	5.4	6.3

(1) Annual initial base rent.

(2) Escalated rent is calculated as total annual income less electric charges.

(3) Includes expiring space, relocating tenants and move-outs where tenants vacated. Excludes lease expirations where tenants held over.

(4) Average starting office rent excluding new tenants replacing vacancies was $70.21 per rentable square feet for 120,566 rentable square feet. Average starting office rent for office space (leased and early renewals, excluding new tenants replacing vacancies) was $72.83 per rentable square feet for 217,384 rentable square feet.

(5) Average starting office rent excluding new tenants replacing vacancies was $37.88 per rentable square feet for 25,866 rentable square feet. Average starting office rent for office space (leased and early renewals, excluding new tenants replacing vacancies) was $35.19 per rentable square feet for 96,688 rentable square feet.

Investment Income

Investment income decreased primarily as a result of additional income recognized from the recapitalization of a debt investment ($41.0 million) in the third quarter of 2016, partially offset by income related to our preferred equity investment in 885 Third Avenue ($16.9 million) and a larger weighted average book balance. For the twelve months ended December 31, 2017, the weighted average debt and preferred equity investment balance outstanding and weighted average yield were $1.9 billion and 9.3% excluding our investment in Two Herald Square which was put on non-accrual in August 2017, respectively, compared to $1.5 billion and 9.7%, respectively, for the same period in 2016. As of December 31, 2017, the debt and preferred equity investments had a weighted average term to maturity of 2.2 years excluding extension options and our investment in Two Herald Square.

Other Income

Other income decreased primarily as a result of the termination fee earned in connection with the termination of the lease with Citigroup, Inc. at 388-390 Greenwich in 2016 ($94.0 million) and promote income earned in connection with the sale of 33

51

Beekman in the second quarter of 2016 ($10.8 million). The decrease was partially offset by net fees recognized in connection with the One Vanderbilt venture in 2017 ($13.3 million).

Property Operating Expenses

Property operating expenses decreased primarily as a result of Disposed Properties ($33.4 million) partially offset by increased real estate taxes at our Same-Store Properties ($8.2 million).

Transaction Related Costs

The decrease in transaction related costs in 2017 is primarily due to the adoption of ASU No. 2017-01 in 2017, which clarified the definition of a business and provided guidance to assist in determining whether transactions should be accounted for as acquisitions of assets or businesses. Following the adoption of the guidance, most of our real estate acquisitions are considered asset acquisitions and transaction costs are therefore capitalized to the investment basis when they would have previously been expensed under the previous guidance. Transaction costs expensed in 2017 relate primarily to transactions that are not moving forward for which any costs incurred are expensed.

Marketing, General and Administrative Expenses

Marketing, general and administrative expenses for the year ended December 31, 2017 were $100.5 million, including a $4.1 million charge related to forfeiture of the Company's 2014 Outperformance Plan awards, or 5.3% of total combined revenues, including our share of joint venture revenues, and 53 basis points of total combined assets, including our share of joint venture assets compared to $99.8 million, or 4.7% of total revenues including our share of joint venture revenues, and 53 basis points of total combined assets including our share of joint venture assets for 2016.

Interest Expense and Amortization of Deferred Financing Costs, Net of Interest Income

Interest expense and amortization of deferred financing costs, net of interest income, decreased primarily as a result of the Disposed Properties ($72.2 million). The weighted average consolidated debt balance outstanding was $6.6 billion for the year ended December 31, 2017 from $8.5 billion for the year ended December 31, 2016. The consolidated weighted average interest rate was 4.00% for the year ended December 31, 2017 as compared to 3.82% for the year ended December 31, 2016.

Depreciation and Amortization

Depreciation and amortization decreased primarily as a result of the Disposed Properties ($448.9 million), partially offset by accelerated amortization at 5-7 Dey Street, 183 & 187 Broadway upon the commencement of demolition of the properties ($32.0 million).

Equity in Net Income in Unconsolidated Joint Venture/Real Estate

Equity in net income from unconsolidated joint ventures increased primarily as a result of the sale of a 40% interest in 11 Madison in the third quarter of 2016 ($13.0 million), as well as higher net income contributions from 1745 Broadway ($7.3 million) and 605 West 42nd Street ($3.5 million) in 2017. These increases were partially offset by lower net income contributions from 280 Park Avenue ($5.7 million) as a result of the write off of deferred financing costs in conjunction with the refinancing of the debt on the property, reduced occupancy at 3 Columbus Circle ($3.9 million), and revenues from a debt and preferred equity investment that was contributed to a joint venture in the first quarter of 2016, and repaid in the second quarter of 2017 ($2.7 million).

Equity in Net Gain on Sale of Interest in Unconsolidated Joint Ventures

During the year ended December 31, 2016 we recognized a gain on the sale related to our interests in 747 Madison Avenue ($13.0 million), 102 Greene Street ($0.3 million) and part of our interest in the Stonehenge Portfolio ($0.9 million). The sale of 747 Madison, which occurred in 2014, did not meet the criteria for sale accounting at that time and, therefore, remained on our consolidated financial statement until the criteria was met in the second quarter of 2017. During the year ended December 31, 2016, in which we recognized a gain on the sale of our interests in 33 Beekman Street ($33.0 million), 7 Renaissance Square ($4.2 million), 1 Jericho ($3.3 million) and EOP Denver ($3.1 million).

Gain on Sale of Real Estate, Net

During the year ended December 31, 2017, we recognized a gain on sale associated with the sale of the property at 16 Court Street ($64.9 million), and the partial sale of the property at 102 Greene Street ($4.9 million). This gain was partially offset by a loss on the sale of 885 Third Avenue ($8.8 million) which closed in 2016, but was only recognized in the second quarter of 2017 due to the sale not meeting the criteria for sale accounting under the full accrual method in ASC 360-20 until the second quarter of 2017. During the year ended December 31, 2016 we recognized a gain on sale associated with the sales of 388-390 Greenwich ($206.5 million), a 49% interest in 400 East 57th Street ($23.9 million), 248-252 Bedford Avenue in Brooklyn, New York ($15.3 million), and a 40% interest in 11 Madison Avenue ($3.6 million), partially offset by the loss on the sale of 7 International Drive, Westchester County, NY ($6.9 million).

52

Depreciable Real Estate Reserves and Impairment

During the year ended December 31, 2017, we recorded a $178.5 million of depreciable real estate reserves and impairment related to Reckson Executive Park, Stamford Towers, 125 Chubb Avenue in Lyndhurst, NJ, 115-117 Stevens Avenue in Valhalla, New York, 520 White Plains Road in Tarrytown, NY, and our investment in Jericho Plaza. During the year ended December 31, 2016, we recognized depreciable real estate reserves and impairment related to 500 West Putnam ($10.4 million).

Liquidity and Capital Resources

We currently expect that our principal sources of funds to meet our short-term and long-term liquidity requirements for working capital, acquisitions, development or redevelopment of properties, tenant improvements, leasing costs, share repurchases, dividends to shareholders, distributions to unitholders, repurchases or repayments of outstanding indebtedness (which may include exchangeable debt) and for debt and preferred equity investments will include:

(1) Cash flow from operations;

(2) Cash on hand;

(3) Net proceeds from divestitures of properties and redemptions, participations and dispositions of debt and preferred equity investments;

(4) Borrowings under the 2017 credit facility;

(5) Other forms of secured or unsecured financing; and

(6) Proceeds from common or preferred equity or debt offerings by the Company or the Operating Partnership (including issuances of units of limited partnership interest in the Operating Partnership and Trust preferred securities).

Cash flow from operations is primarily dependent upon the occupancy level of our portfolio, the net effective rental rates achieved on our leases, the collectability of rent, operating escalations and recoveries from our tenants and the level of operating and other costs. Additionally, we believe that our debt and preferred equity investment program will continue to serve as a source of operating cash flow.

The combined aggregate principal maturities of our property mortgages and other loans payable, corporate obligations and our share of joint venture debt, including as-of-right extension options, as of December 31, 2018 were as follows (in thousands):

	2019		2020		2021		2022		2023		Thereafter		Total
Property mortgages and other loans	$	6,241	$	26,640	$	151,505	$	208,017	$	122,851	$	1,145,405	$	1,660,659
MRA and FHLB facilities	27,500		300,000		—		—		—		—		327,500
Corporate obligations	—		250,000		350,000		800,000		1,800,000		400,000		3,600,000
Joint venture debt-our share	115,295		278,791		518,371		220,810		277,996		2,430,198		3,841,461
Total	$	149,036	$	855,431	$	1,019,876	$	1,228,827	$	2,200,847	$	3,975,603	$	9,429,620

As of December 31, 2018, we had $158.1 million of consolidated cash on hand, inclusive of $28.6 million of marketable securities. We expect to generate positive cash flow from operations for the foreseeable future. We may seek to divest of properties or interests in properties or access private and public debt and equity capital when the opportunity presents itself, although there is no guarantee that this capital will be made available to us at efficient levels or at all. Management believes that these sources of liquidity, if we are able to access them, along with potential refinancing opportunities for secured and unsecured debt, will allow us to satisfy our debt obligations, as described above, upon maturity, if not before.

We also have investments in several real estate joint ventures with various partners who we consider to be financially stable and who have the ability to fund a capital call when needed. Most of our joint ventures are financed with non-recourse debt. We believe that property level cash flows along with unfunded committed indebtedness and proceeds from the refinancing of outstanding secured indebtedness will be sufficient to fund the capital needs of our joint venture properties.

Cash Flows

The following summary discussion of our cash flows is based on our consolidated statements of cash flows in "Item 1. Financial Statements" and is not meant to be an all-inclusive discussion of the changes in our cash flows for the years presented below.

Cash, restricted cash, and cash equivalents were $279.1 million and $250.0 million at December 31, 2018 and 2017, respectively, representing a increase of $29.1 million. The increase was a result of the following changes in cash flows (in thousands):

53

	Year Ended December 31,
	2018			2017			(Decrease) Increase
Net cash provided by operating activities	$	441,537		$	543,001		$	(101,464	)
Net cash provided by investing activities	$	681,662		$	22,014		$	659,648
Net cash used in by financing activities	$	(1,094,112	)	$	(684,956	)	$	(409,156	)

Our principal source of operating cash flow is related to the leasing and operating of the properties in our portfolio. Our properties provide a relatively consistent stream of cash flow that provides us with resources to pay operating expenses, debt service, and fund quarterly dividend and distribution requirements. Our debt and preferred equity investments and joint venture investments also provide a steady stream of operating cash flow to us.

Cash is used in investing activities to fund acquisitions, development or redevelopment projects and recurring and nonrecurring capital expenditures. We selectively invest in new projects that enable us to take advantage of our development, leasing, financing and property management skills, and invest in existing buildings that meet our investment criteria. During the year ended December 31, 2018, when compared to the year ended December 31, 2017, we used cash primarily for the following investing activities (in thousands):

Acquisitions of real estate	$	(31,806	)
Capital expenditures and capitalized interest	81,541
Escrow cash-capital improvements/acquisition deposits/deferred purchase price	—
Joint venture investments	(11,180		)
Distributions from joint ventures	(86,627		)
Proceeds from sales of real estate/partial interest in property	538,208
Debt and preferred equity and other investments	169,512
Increase in net cash used in investing activities	$	659,648

Funds spent on capital expenditures, which are comprised of building and tenant improvements, decreased from $336.0 million for the year ended December 31, 2017 to $254.5 million for the year ended December 31, 2018. The decrease in capital expenditures relates primarily to lower costs incurred in connection with the redevelopment of properties.

We generally fund our investment activity through the sale of real estate, property-level financing, our credit facilities, our MRA facilities, senior unsecured notes, convertible or exchangeable securities, and construction loans. From time to time, the Company may issue common or preferred stock, or the Operating Partnership may issue common or preferred units of limited partnership interest. During the year ended December 31, 2018, when compared to the year ended December 31, 2017, we used cash for the following financing activities (in thousands):

Proceeds from our debt obligations	$	29,333
Repayments of our debt obligations	(249,600		)
Net distribution to noncontrolling interests	12,532
Other financing activities	(39,155		)
Proceeds from stock options exercised and DRSPP issuance	5,511
Payment of debt extinguishment costs	(13,918		)
Repurchase of common stock	(173,239		)
Redemption of preferred stock	(933		)
Dividends and distributions paid	20,313
Increase in net cash provided by financing activities	$	(409,156	)

Capitalization

Our authorized capital stock consists of 260,000,000 shares, $0.01 par value per share, consisting of 160,000,000 shares of common stock, $0.01 par value per share, 75,000,000 shares of excess stock, at $0.01 par value per share, and 25,000,000 shares of preferred stock, $0.01 par value per share. As of December 31, 2018, 83,683,847 shares of common stock and no shares of excess stock were issued and outstanding.

54

Share Repurchase Program

In August 2016, our Board of Directors approved a share repurchase plan under which we can repurchase up to $1.0 billion of shares of our common stock. The Board of Directors has since authorized three separate $500.0 million increases to the size of the share repurchase program in the fourth quarter of 2017, second quarter of 2018, and fourth quarter of 2018, bringing the total program size to $2.5 billion.

At December 31, 2018 repurchases executed under the plan were as follows:

Period	Shares repurchased	Average price paid per share	Cumulative number of shares repurchased as part of the repurchase plan or programs
Year ended 2017	8,342,411	$101.64	8,342,411
First quarter 2018	3,653,928	$97.07	11,996,339
Second quarter 2018	3,479,552	$97.22	15,475,891
Third quarter 2018	252,947	$99.75	15,728,838
Fourth quarter 2018	2,358,484	$93.04	18,087,322

At-The-Market Equity Offering Program

In March 2015, the Company, along with the Operating Partnership, entered into an "at-the-market" equity offering program, or ATM Program, to sell an aggregate of $300.0 million of our common stock. The Company did not make any sales of its common stock under the ATM program in the years ended December 31, 2018, 2017, or 2016.

Dividend Reinvestment and Stock Purchase Plan ("DRSPP")

In February 2018, the Company filed a registration statement with the SEC for our dividend reinvestment and stock purchase plan, or DRSPP, which automatically became effective upon filing. The Company registered 3,500,000 shares of our common stock under the DRSPP. The DRSPP commenced on September 24, 2001.

The following table summarizes SL Green common stock issued, and proceeds received from dividend reinvestments and/or stock purchases under the DRSPP for the years ended December 31, 2018, 2017, and 2016, respectively (in thousands):

	Year Ended December 31,
	2018		2017		2016
Shares of common stock issued	1,399		2,141		2,687
Dividend reinvestments/stock purchases under the DRSPP	$	136	$	223	$	277

Fourth Amended and Restated 2005 Stock Option and Incentive Plan

The Fourth Amended and Restated 2005 Stock Option and Incentive Plan, or the 2005 Plan, was approved by the Company's board of directors in April 2016 and its stockholders in June 2016 at the Company's annual meeting of stockholders. Subject to adjustments upon certain corporate transactions or events, awards with respect to up to a maximum of 27,030,000 fungible units may be granted as options, restricted stock, phantom shares, dividend equivalent rights and other equity-based awards under the 2005 Plan. As of December 31, 2018, 6.7 million fungible units were available for issuance under the 2005 Plan after reserving for shares underlying outstanding restricted stock units, phantom stock units granted pursuant to our Non-Employee Directors' Deferral Program and LTIP Units.

55

2014 Outperformance Plan

In August 2014, the compensation committee of the Company's board of directors approved the general terms of the SL Green Realty Corp. 2014 Outperformance Plan, or the 2014 Outperformance Plan. Participants in the 2014 Outperformance Plan could earn, in the aggregate, up to 610,000 LTIP Units in our Operating Partnership based on our total return to stockholders for the three-year period beginning September 1, 2014. Under the 2014 Outperformance Plan, two-thirds of the LTIP Units were subject to performance based vesting based on the Company’s absolute total return to stockholders and one-third of the LTIP Units were subject to performance based vesting based on relative total return to stockholders compared to the constituents of the MSCI REIT Index. LTIP Units earned under the 2014 Outperformance Plan were to be subject to continued vesting requirements, with 50% of any awards earned vesting on August 31, 2017 and the remaining 50% vesting on August 31, 2018, subject to continued employment with us through such dates. Participants were not entitled to distributions with respect to LTIP Units granted under the 2014 Outperformance Plan unless and until they are earned. If LTIP Units were earned, each participant would have been entitled to the distributions that would have been paid had the number of earned LTIP Units been issued at the beginning of the performance period, with such distributions being paid in the form of cash or additional LTIP Units. Thereafter, distributions were to be paid currently with respect to all earned LTIP Units, whether vested or unvested.

Based on our performance, none of the LTIP Units granted under the 2014 Outperformance Plan were earned pursuant to the terms of the 2014 Outperformance Plan, and all units issued were forfeited in 2017.

The cost of the 2014 Outperformance Plan ($27.9 million subject to forfeitures), based on the portion of the 2014 Outperformance Plan granted prior to termination, was amortized into earnings through December 31, 2017. We recorded zero compensation expense during the year ended December 31, 2018, and compensation expense of $13.6 million and $8.4 million during the years ended December 31, 2017 and 2016, respectively, related to the 2014 Outperformance Plan.

Deferred Compensation Plan for Directors

Under our Non-Employee Director's Deferral Program, which commenced July 2004, the Company's non-employee directors may elect to defer up to 100% of their annual retainer fee, chairman fees, meeting fees and annual stock grant. Unless otherwise elected by a participant, fees deferred under the program shall be credited in the form of phantom stock units. The program provides that a director's phantom stock units generally will be settled in an equal number of shares of common stock upon the earlier of (i) the January 1 coincident with or the next following such director's termination of service from the Board of Directors or (ii) a change in control by us, as defined by the program. Phantom stock units are credited to each non-employee director quarterly using the closing price of our common stock on the first business day of the respective quarter. Each participating non-employee director is also credited with dividend equivalents or phantom stock units based on the dividend rate for each quarter, which are either paid in cash currently or credited to the director’s account as additional phantom stock units.

During the year ended December 31, 2018, 13,638 phantom stock units were earned and 9,459 shares of common stock were issued to our board of directors. We recorded compensation expense of $2.4 million during the year ended December 31, 2018 related to the Deferred Compensation Plan. As of December 31, 2018, there were 113,492 phantom stock units outstanding pursuant to our Non-Employee Director's Deferral Program.

Employee Stock Purchase Plan

In 2007, the Company's board of directors adopted the 2008 Employee Stock Purchase Plan, or ESPP, to encourage our employees to increase their efforts to make our business more successful by providing equity-based incentives to eligible employees. The ESPP is intended to qualify as an "employee stock purchase plan" under Section 423 of the Code, and has been adopted by the board to enable our eligible employees to purchase the Company's shares of common stock through payroll deductions. The ESPP became effective on January 1, 2008 with a maximum of 500,000 shares of the common stock available for issuance, subject to adjustment upon a merger, reorganization, stock split or other similar corporate change. The Company filed a registration statement on Form S-8 with the SEC with respect to the ESPP. The common stock is offered for purchase through a series of successive offering periods. Each offering period will be three months in duration and will begin on the first day of each calendar quarter, with the first offering period having commenced on January 1, 2008. The ESPP provides for eligible employees to purchase the common stock at a purchase price equal to 85% of the lesser of (1) the market value of the common stock on the first day of the offering period or (2) the market value of the common stock on the last day of the offering period. The ESPP was approved by our stockholders at our 2008 annual meeting of stockholders. As of December 31, 2018, 116,368 shares of our common stock had been issued under the ESPP.

56

Indebtedness

The table below summarizes our consolidated mortgages and other loans payable, 2017 credit facility, senior unsecured notes and trust preferred securities outstanding at December 31, 2018 and 2017, (amounts in thousands).

	December 31,
Debt Summary:	2018			2017
Balance
Fixed rate	$	2,543,476		$	3,805,165
Variable rate—hedged	1,000,000			500,000
Total fixed rate	3,543,476			4,305,165
Total variable rate	2,048,442			1,605,431
Total debt	$	5,591,918		$	5,910,596
Debt, preferred equity, and other investments subject to variable rate	1,299,390			1,325,166
Net exposure to variable rate debt	749,052			280,265
Percent of Total Debt:
Fixed rate	63.4		%	72.8		%
Variable rate	36.6		%	27.2		%
Total	100.0		%	100.0		%
Effective Interest Rate for the Year:
Fixed rate	4.34		%	4.31		%
Variable rate	3.57		%	2.76		%
Effective interest rate	4.06		%	4.00		%

The variable rate debt shown above generally bears interest at an interest rate based on 30-day LIBOR (2.50% and 1.56% at December 31, 2018 and 2017, respectively). Our consolidated debt at December 31, 2018 had a weighted average term to maturity of 4.66 years.

Certain of our debt and preferred equity investments, with a carrying value of $1.3 billion at December 31, 2018, are variable rate investments, which mitigate our exposure to interest rate changes on our unhedged variable rate debt.

Mortgage Financing

As of December 31, 2018, our total mortgage debt (excluding our share of joint venture mortgage debt of $3.8 billion) consisted of $1.4 billion of fixed rate debt, including swapped variable rate debt, with an effective weighted average interest rate of 4.26% and $0.6 billion of variable rate debt with an effective weighted average interest rate of 4.87%.

Corporate Indebtedness

2017 Credit Facility

In November 2017, we entered into an amendment to the credit facility, referred to as the 2017 credit facility, that was originally entered into by the Company in November 2012, or the 2012 credit facility. As of December 31, 2018, the 2017 credit facility consisted of a $1.5 billion revolving credit facility, a $1.3 billion term loan (or "Term Loan A"), and a $200.0 million term loan (or "Term Loan B") with maturity dates of March 31, 2022, March 31, 2023, and November 21, 2024, respectively. The revolving credit facility has twosix-month as-of-right extension options to March 31, 2023. We also have an option, subject to customary conditions, to increase the capacity of the credit facility to $4.5 billion at any time prior to the maturity dates for the revolving credit facility and term loans without the consent of existing lenders, by obtaining additional commitments from our existing lenders and other financial institutions.

As of December 31, 2018, the 2017 credit facility bore interest at a spread over 30-day LIBOR ranging from (i) 82.5 basis points to 155 basis points for loans under the revolving credit facility, (ii) 90 basis points to 175 basis points for loans under Term Loan A, and (iii) 150 basis points to 245 basis points for loans under Term Loan B, in each case based on the credit rating assigned to the senior unsecured long term indebtedness of the Company.

At December 31, 2018, the applicable spread was 100 basis points for the revolving credit facility, 110 basis points for Term Loan A, and 165 basis points for Term Loan B. We are required to pay quarterly in arrears a 12.5 to 30 basis point facility fee on

57

the total commitments under the revolving credit facility based on the credit rating assigned to the senior unsecured long term indebtedness of the Company. As of December 31, 2018, the facility fee was 20 basis points.

As of December 31, 2018, we had $11.8 million of outstanding letters of credit, $500.0 million drawn under the revolving credit facility and $1.5 billion outstanding under the term loan facilities, with total undrawn capacity of $1.0 billion under the 2017 credit facility. At December 31, 2018 and December 31, 2017, the revolving credit facility had a carrying value of $492.2 million and $30.3 million, respectively, net of deferred financing costs. At December 31, 2018 and December 31, 2017, the term loan facilities had a carrying value of $1.5 billion and $1.5 billion, respectively, net of deferred financing costs.

The Company and the Operating Partnership are borrowers jointly and severally obligated under the 2017 credit facility.

The 2017 credit facility includes certain restrictions and covenants (see Restrictive Covenants below).

Federal Home Loan Bank of New York Facility

The Company’s wholly-owned subsidiary, Ticonderoga Insurance Company, or Ticonderoga, a Vermont licensed captive insurance company, is a member of the Federal Home Loan Bank of New York, or FHLBNY. As a member, Ticonderoga may borrow funds from the FHLBNY in the form of secured advances. As of December 31, 2018, we had $13.0 million and $14.5 million in outstanding secured advances with a borrowing rate of 30-day LIBOR over 27 basis points and 30-day LIBOR over 18 basis points, respectively.

Master Repurchase Agreements

The Company has entered into two Master Repurchase Agreements, or MRAs, known as the 2016 MRA and 2017 MRA, which provide us with the ability to sell certain debt investments with a simultaneous agreement to repurchase the same at a certain date or on demand. We seek to mitigate risks associated with our repurchase agreement by managing the credit quality of our assets, early repayments, interest rate volatility, liquidity, and market value. The margin call provisions under our repurchase facilities permit valuation adjustments based on capital markets activity, and are not limited to collateral-specific credit marks. To monitor credit risk associated with our debt investments, our asset management team regularly reviews our investment portfolio and is in contact with our borrowers in order to monitor the collateral and enforce our rights as necessary. The risk associated with potential margin calls is further mitigated by our ability to recollateralize the facility with additional assets from our portfolio of debt investments, our ability to satisfy margin calls with cash or cash equivalents and our access to additional liquidity through the 2017 credit facility, as defined above.

In June 2017, we entered into the 2017 MRA, with a maximum facility capacity of $300.0 million. In April 2018, we increased the maximum facility capacity to $400.0 million. The facility bears interest on a floating rate basis at a spread to 30-day LIBOR based on the pledged collateral and advance rate and has an initial one year term, with twoone year extension options. In June 2018, we exercised a one year extension option. At December 31, 2018, the facility had a carrying value of $299.6 million, net of deferred financing costs.

In July 2016, we entered into a restated 2016 MRA, with a maximum facility capacity of $300.0 million. In June 2018, we terminated the restated 2016 MRA. The facility bore interest ranging from 225 and 400 basis points over 30-day LIBOR depending on the pledged collateral and had an initial two-year term, with a one year extension option. Since December 6, 2015, we had been required to pay monthly in arrears a 25 basis point fee on the excess of $150.0 million over the average daily balance during the period when the average daily balance was less than $150.0 million.

58

Senior Unsecured Notes

The following table sets forth our senior unsecured notes and other related disclosures as of December 31, 2018 and 2017, respectively, by scheduled maturity date (amounts in thousands):

Issuance	December 31, 2018 Unpaid Principal Balance		December 31, 2018 Accreted Balance			December 31, 2017 Accreted Balance			Interest Rate (1)			Initial Term (in Years)	Maturity Date
March 16, 2010 (2)	$	250,000	$	250,000		$	250,000			7.75	%	10	March 2020
August 7, 2018 (3) (4)	350,000		350,000			—			L+	0.98	%	3	August 2021
October 5, 2017 (3)	500,000		499,591			499,489				3.25	%	5	October 2022
November 15, 2012 (5)	300,000		304,168			305,163				4.50	%	10	December 2022
December 17, 2015 (2)	100,000		100,000			100,000				4.27	%	10	December 2025
August 5, 2011 (2) (6)	—		—			249,953
	$	1,500,000	$	1,503,759		$	1,404,605
Deferred financing costs, net			(8,545		)	(8,666		)
	$	1,500,000	$	1,495,214		$	1,395,939

(1) Interest rate as of December 31, 2018, taking into account interest rate hedges in effect during the period. Floating rate notes are presented with the stated spread over 3-month LIBOR, unless otherwise specified. Interest on the senior unsecured notes is payable semi-annually with principal and unpaid interest due on the scheduled maturity dates.

(2) Issued by the Company and the Operating Partnership as co-obligors.

(3) Issued by the Operating Partnership with the Company as the guarantor.

(4) Beginning on August 8, 2019 and at any time thereafter, the notes are subject to redemption at the Company's option, in whole but not in part, at a redemption price equal to 100% of the principal amount of the notes, plus unpaid accrued interest thereon to the redemption date.

(5) In October 2017, the Company and the Operating Partnership as co-obligors issued an additional $100.0 million of 4.50% senior unsecured notes due December 2022. The notes were priced at 105.334%.

(6) The balance was repaid in August 2018.

Restrictive Covenants

The terms of the 2017 credit facility and certain of our senior unsecured notes include certain restrictions and covenants which may limit, among other things, our ability to pay dividends, make certain types of investments, incur additional indebtedness, incur liens and enter into negative pledge agreements and dispose of assets, and which require compliance with financial ratios relating to the maximum ratio of total indebtedness to total asset value, a minimum ratio of EBITDA to fixed charges, a maximum ratio of secured indebtedness to total asset value and a maximum ratio of unsecured indebtedness to unencumbered asset value. The dividend restriction referred to above provides that, we will not during any time when a default is continuing, make distributions with respect to common stock or other equity interests, except to enable the Company to continue to qualify as a REIT for Federal income tax purposes. As of December 31, 2018 and 2017, we were in compliance with all such covenants.

Junior Subordinated Deferrable Interest Debentures

In June 2005, the Company and the Operating Partnership issued $100.0 million in unsecured trust preferred securities through a newly formed trust, SL Green Capital Trust I, or the Trust, which is a wholly-owned subsidiary of the Operating Partnership. The securities mature in 2035 and bear interest at a floating rate of 125 basis points over the three-month LIBOR. Interest payments may be deferred for a period of up to eight consecutive quarters if the Operating Partnership exercises its right to defer such payments. The Trust preferred securities are redeemable at the option of the Operating Partnership, in whole or in part, with no prepayment premium. We do not consolidate the Trust even though it is a variable interest entity as we are not the primary beneficiary. Because the Trust is not consolidated, we have recorded the debt on our consolidated balance sheets and the related payments are classified as interest expense.

Interest Rate Risk

We are exposed to changes in interest rates primarily from our variable rate debt. Our exposure to interest rate fluctuations are managed through either the use of interest rate derivative instruments and/or through our variable rate debt and preferred equity investments. Based on the debt outstanding as of December 31, 2018, a hypothetical 100 basis point increase in the floating rate interest rate curve would increase our consolidated annual interest cost, net of interest income from variable rate debt and preferred equity investments, by $7.1 million and would increase our share of joint venture annual interest cost by $14.3 million. At December 31, 2018, 61.9% of our $2.1 billion debt and preferred equity portfolio is indexed to LIBOR.

59

We recognize most derivatives on the balance sheet at fair value. Derivatives that are not hedges are adjusted to fair value through income. If a derivative is considered a hedge, depending on the nature of the hedge, changes in the fair value of the derivative will either be offset against the change in fair value of the hedged asset, liability, or firm commitment through earnings, or recognized in other comprehensive income until the hedged item is recognized in earnings. The ineffective portion of a derivative's change in fair value is immediately recognized in earnings.

Our long-term debt of $3.5 billion bears interest at fixed rates, and therefore the fair value of these instruments is affected by changes in the market interest rates. Our variable rate debt and variable rate joint venture debt as of December 31, 2018 bore interest at rates between LIBOR plus 18 basis points and LIBOR plus 340 basis points.

Contractual Obligations

The combined aggregate principal maturities of mortgages and other loans payable, the 2017 credit facility, senior unsecured notes (net of discount), trust preferred securities, our share of joint venture debt, including as-of-right extension options and put options, estimated interest expense, and our obligations under our capital lease and ground leases, as of December 31, 2018 are as follows (in thousands):

	2019		2020		2021		2022		2023		Thereafter		Total
Property mortgages and other loans	$	6,241	$	26,640	$	151,505	$	208,017	$	122,851	$	1,145,405	$	1,660,659
MRA and FHLB facilities	27,500		300,000		—		—		—		—		327,500
Revolving credit facility	—		—		—		—		500,000		—		500,000
Unsecured term loans	—		—		—		—		1,300,000		200,000		1,500,000
Senior unsecured notes	—		250,000		350,000		800,000		—		100,000		1,500,000
Trust preferred securities	—		—		—		—		—		100,000		100,000
Capital lease	2,411		2,620		2,794		2,794		2,794		817,100		830,513
Ground leases	31,066		31,436		31,628		29,472		27,166		676,090		826,858
Estimated interest expense	222,554		196,142		185,017		150,712		81,781		193,794		1,030,000
Joint venture debt	115,295		278,791		518,371		220,810		277,996		2,430,198		3,841,461
Total	$	405,067	$	1,085,629	$	1,239,315	$	1,411,805	$	2,312,588	$	5,662,587	$	12,116,991

Off-Balance Sheet Arrangements

We have off-balance sheet investments, including joint ventures and debt and preferred equity investments. These investments all have varying ownership structures. Substantially all of our joint venture arrangements are accounted for under the equity method of accounting as we have the ability to exercise significant influence, but not control, over the operating and financial decisions of these joint venture arrangements. Our off-balance sheet arrangements are discussed in Note 5, "Debt and Preferred Equity Investments" and Note 6, "Investments in Unconsolidated Joint Ventures" in the accompanying consolidated financial statements.

Capital Expenditures

We estimate that for the year ending December 31, 2019, we expect to incur $151.1 million of recurring capital expenditures and $65.2 million of development or redevelopment expenditures on existing consolidated properties, and our share of capital expenditures at our joint venture properties will be $449.6 million. Future property acquisitions may require substantial capital investments for refurbishment and leasing costs. We expect to fund these capital expenditures with operating cash flow, existing liquidity, or incremental borrowings. We expect our capital needs over the next twelve months and thereafter will be met through a combination of cash on hand, net cash provided by operations, potential asset sales, borrowings or additional equity or debt issuances.

Dividends/Distributions

We expect to pay dividends to our stockholders based on the distributions we receive from our Operating Partnership primarily from property revenues net of operating expenses or, if necessary, from working capital.

To maintain our qualification as a REIT, we must pay annual dividends to our stockholders of at least 90% of our REIT taxable income, determined before taking into consideration the dividends paid deduction and net capital gains. We intend to continue to pay regular quarterly dividends to our stockholders. Based on our current annual dividend rate of $3.40 per share, we would pay $298.6 million in dividends to our common stockholders on an annual basis. Before we pay any dividend, whether for

60

Federal income tax purposes or otherwise, which would only be paid out of available cash to the extent permitted under the 2017 credit facility and senior unsecured notes, we must first meet both our operating requirements and scheduled debt service on our mortgages and loans payable.

Related Party Transactions

Cleaning/ Security/ Messenger and Restoration Services

Alliance Building Services, or Alliance, and its affiliates are partially owned by Gary Green, a son of Stephen L. Green, who serves as a member and as the chairman emeritus of our board of directors, and provide services to certain properties owned by us. Alliance’s affiliates include First Quality Maintenance, L.P., or First Quality, Classic Security LLC, Bright Star Couriers LLC and Onyx Restoration Works, and provide cleaning, extermination, security, messenger, and restoration services, respectively. In addition, First Quality has the non-exclusive opportunity to provide cleaning and related services to individual tenants at our properties on a basis separately negotiated with any tenant seeking such additional services. The Service Corporation has entered into an arrangement with Alliance whereby it will receive a profit participation above a certain threshold for services provided by Alliance to certain tenants at certain buildings above the base services specified in their lease agreements.

Income earned from the profit participation, which is included in other income on the consolidated statements of operations, was $3.9 million, $3.9 million and $3.5 million for the years ended December 31, 2018, 2017 and 2016, respectively.

We also recorded expenses, inclusive of capitalized expenses, of $18.8 million, $22.6 million and $23.4 million the years ended December 31, 2018, 2017 and 2016, respectively, for these services (excluding services provided directly to tenants).

Management Fees

S.L. Green Management Corp., a consolidated entity, receives property management fees from an entity in which Stephen L. Green owns an interest. We received management fees from this entity of $0.6 million, $0.5 million and $0.7 million for the years ended December 31, 2018, 2017, and 2016 respectively.

One Vanderbilt Investment

In December 2016, we entered into agreements with entities owned and controlled by Marc Holliday and Andrew Mathias, pursuant to which they agreed to make an investment in our One Vanderbilt project at the appraised fair market value for the interests acquired. This investment entitles these entities to receive approximately 1.50% - 1.80% and 1.00% - 1.20%, respectively, of any profits realized by the Company from its One Vanderbilt project in excess of the Company’s capital contributions. The entities have no right to any return of capital. Accordingly, subject to previously disclosed repurchase rights, these interests will have no value and will not entitle these entities to any amounts (other than limited distributions to cover tax liabilities incurred) unless and until the Company has received distributions from the One Vanderbilt project in excess of the Company’s aggregate investment in the project. In the event that the Company does not realize a profit on its investment in the project (or would not realize a profit based on the value at the time the interests are repurchased), the entities owned and controlled by Messrs. Holliday and Mathias will lose the entire amount of their investment. The entities owned and controlled by Messrs. Holliday and Mathias paid $1.4 million and $1.0 million, respectively, which equal the fair market value of the interests acquired as of the date the investment agreements were entered into as determined by an independent third party appraisal that we obtained.

Messrs. Holliday and Mathias cannot monetize their interests until after stabilization of the property (50% within three years after stabilization and 100% three years or more after stabilization). In addition, the agreement calls for us to repurchase these interests in the event of a sale of One Vanderbilt or a transactional change of control of the Company. We also have the right to repurchase these interests on the seven-year anniversary of the stabilization of the project or upon the occurrence of certain separation events prior to the stabilization of the project relating to each of Messrs. Holliday’s and Mathias’s continued service with us. The price paid upon monetization of the interests will equal the liquidation value of the interests at the time, with the value of One Vanderbilt being based on its sale price, if applicable, or fair market value as determined by an independent third party appraiser.

61

Insurance

We maintain “all-risk” property and rental value coverage (including coverage regarding the perils of flood, earthquake and terrorism, excluding nuclear, biological, chemical, and radiological terrorism ("NBCR")), within three property insurance programs and liability insurance. Separate property and liability coverage may be purchased on a stand-alone basis for certain assets, such as the development of One Vanderbilt. Additionally, one of our captive insurance companies, Belmont Insurance Company, or Belmont, provides coverage for NBCR terrorist acts above a specified trigger. Belmont's retention is reinsured by our other captive insurance company, Ticonderoga Insurance Company ("Ticonderoga"). If Belmont or Ticonderoga are required to pay a claim under our insurance policies, we would ultimately record the loss to the extent of required payments. However, there is no assurance that in the future we will be able to procure coverage at a reasonable cost. Further, if we experience losses that are uninsured or that exceed policy limits, we could lose the capital invested in the damaged properties as well as the anticipated future cash flows from those properties. Additionally, our debt instruments contain customary covenants requiring us to maintain insurance and we could default under debt our instruments if the cost and/or availability of certain types of insurance make it impractical or impossible to comply with such covenants relating to insurance. Belmont and Ticonderoga provide coverage solely on properties owned by the Company or its affiliates.

Furthermore, with respect to certain of our properties, including properties held by joint ventures, or subject to triple net leases, insurance coverage is obtained by a third-party and we do not control the coverage. While we may have agreements with such third parties to maintain adequate coverage and we monitor these policies, such coverage ultimately may not be maintained or adequately cover our risk of loss.

Funds from Operations

FFO is a widely recognized non-GAAP financial measure of REIT performance. The Company computes FFO in accordance with standards established by NAREIT, which may not be comparable to FFO reported by other REITs that do not compute FFO in accordance with the NAREIT definition, or that interpret the NAREIT definition differently than the Company does. The revised White Paper on FFO approved by the Board of Governors of NAREIT in April 2002, and subsequently amended, defines FFO as net income (loss) (computed in accordance with GAAP), excluding gains (or losses) from sales of properties and real estate related impairment charges, plus real estate related depreciation and amortization and after adjustments for unconsolidated partnerships and joint ventures.

The Company presents FFO because it considers it an important supplemental measure of the Company’s operating performance and believes that it is frequently used by securities analysts, investors and other interested parties in the evaluation of REITs, particularly those that own and operate commercial office properties. The Company also uses FFO as one of several criteria to determine performance-based bonuses for members of its senior management. FFO is intended to exclude GAAP historical cost depreciation and amortization of real estate and related assets, which assumes that the value of real estate assets diminishes ratably over time. Historically, however, real estate values have risen or fallen with market conditions. Because FFO excludes depreciation and amortization unique to real estate, gains and losses from property dispositions, and real estate related impairment charges, it provides a performance measure that, when compared year over year, reflects the impact to operations from trends in occupancy rates, rental rates, operating costs, and interest costs, providing perspective not immediately apparent from net income. FFO does not represent cash generated from operating activities in accordance with GAAP and should not be considered as an alternative to net income (determined in accordance with GAAP), as an indication of the Company’s financial performance or to cash flow from operating activities (determined in accordance with GAAP) as a measure of the Company’s liquidity, nor is it indicative of funds available to fund the Company’s cash needs, including our ability to make cash distributions.

62

FFO for the years ended December 31, 2018, 2017, and 2016 are as follows (in thousands):

	Year Ended December 31,
	2018			2017			2016
Net income attributable to SL Green common stockholders	$	232,312		$	86,424		$	234,946
Add:
Depreciation and amortization	279,507			403,320			821,041
Joint venture depreciation and noncontrolling interest adjustments	187,147			102,334			69,853
Net income (loss) attributable to noncontrolling interests	12,210			(11,706		)	17,780
Less:
(Loss) gain on sale of real estate and discontinued operations	(30,757		)	73,241			238,116
Equity in net gain on sale of interest in unconsolidated joint venture/real estate	303,967			16,166			44,009
Purchase price and other fair value adjustment	57,385			—			—
Depreciable real estate reserves and impairment	(227,543		)	(178,520		)	(10,387		)
Depreciation on non-rental real estate assets	2,404			2,191			2,027
Funds from Operations attributable to SL Green common stockholders and noncontrolling interests	$	605,720		$	667,294		$	869,855
Cash flows provided by operating activities	$	441,537		$	543,001		$	644,010
Cash flows provided by investing activities	$	681,662		$	22,014		$	1,973,382
Cash flows used in by financing activities	$	(1,094,112	)	$	(684,956	)	$	(2,736,402	)

Inflation

Substantially all of our office leases provide for separate real estate tax and operating expense escalations as well as operating expense recoveries based on increases in the Consumer Price Index or other measures such as porters' wage. In addition, many of the leases provide for fixed base rent increases. We believe that inflationary increases will be at least partially offset by the contractual rent increases and expense escalations described above.

Accounting Standards Updates

The Accounting Standards Updates are discussed in Note 2, "Significant Accounting Policies - Accounting Standards Updates" in the accompanying consolidated financial statements.

Forward-Looking Information

This report includes certain statements that may be deemed to be "forward-looking statements" within the meaning of the Private Securities Litigation Reform Act of 1995 and are intended to be covered by the safe harbor provisions thereof. All statements, other than statements of historical facts, included in this report that address activities, events or developments that we expect, believe or anticipate will or may occur in the future, including such matters as future capital expenditures, dividends and acquisitions (including the amount and nature thereof), development trends of the real estate industry and the New York metropolitan area markets, business strategies, expansion and growth of our operations and other similar matters, are forward-looking statements. These forward-looking statements are based on certain assumptions and analyses made by us in light of our experience and our perception of historical trends, current conditions, expected future developments and other factors we believe are appropriate.

Forward-looking statements are not guarantees of future performance and actual results or developments may differ materially, and we caution you not to place undue reliance on such statements. Forward-looking statements are generally identifiable by the use of the words "may," "will," "should," "expect," "anticipate," "estimate," "believe," "intend," "project," "continue," or the negative of these words, or other similar words or terms.

Forward-looking statements contained in this report are subject to a number of risks and uncertainties that may cause our actual results, performance or achievements to be materially different from future results, performance or achievements expressed or implied by forward-looking statements made by us. These risks and uncertainties include:

• the effect of general economic, business and financial conditions, and their effect on the New York City real estate market in particular;

• dependence upon certain geographic markets;

• risks of real estate acquisitions, dispositions, development and redevelopment, including the cost of construction delays and cost overruns;

63

• risks relating to debt and preferred equity investments;

• availability and creditworthiness of prospective tenants and borrowers;

• bankruptcy or insolvency of a major tenant or a significant number of smaller tenants or borrowers;

• adverse changes in the real estate markets, including reduced demand for office space, increasing vacancy, and increasing availability of sublease space;

• availability of capital (debt and equity);

• unanticipated increases in financing and other costs, including a rise in interest rates;

• our ability to comply with financial covenants in our debt instruments;

• our ability to maintain our status as a REIT;

• risks of investing through joint venture structures, including the fulfillment by our partners of their financial obligations;

• the threat of terrorist attacks;

• our ability to obtain adequate insurance coverage at a reasonable cost and the potential for losses in excess of our insurance coverage, including as a result of environmental contamination; and

• legislative, regulatory and/or safety requirements adversely affecting REITs and the real estate business including costs of compliance with the Americans with Disabilities Act, the Fair Housing Act and other similar laws and regulations.

Other factors and risks to our business, many of which are beyond our control, are described in other sections of this report and in our other filings with the SEC. We undertake no obligation to publicly update or revise any forward-looking statements, whether as a result of future events, new information or otherwise.

64

ITEM 7A.    QUANTITATIVE AND QUALITATIVE DISCLOSURE ABOUT MARKET RISK

See Item 7, "Management's Discussion and Analysis of Financial Condition and Results of Operations—Market Rate Risk" for additional information regarding our exposure to interest rate fluctuations.

The table below presents the principal cash flows based upon maturity dates of our debt obligations and debt and preferred equity investments and the weighted-average interest rates by expected maturity dates, including as-of-right extension options, as of December 31, 2018 (in thousands):

	Long-Term Debt								Debt and Preferred Equity Investments (1)
	Fixed Rate		Average Interest Rate		Variable Rate		Average Interest Rate		Amount		Weighted Yield
2019	$	6,241	4.08	%	$	27,500	4.04	%	$	442,557	10.31	%
2020	261,117		3.87	%	315,523		3.79	%	1,273,679		8.21	%
2021	11,636		3.83	%	489,869		3.73	%	26,471		9.54	%
2022	1,008,017		3.82	%	—		4.00	%	204,790		11.46	%
2023	1,007,301		4.08	%	915,550		4.38	%	42,706		8.55	%
Thereafter	1,245,405		4.29	%	300,000		4.45	%	109,190		8.46	%
Total	$	3,539,717	3.92	%	$	2,048,442	3.92	%	$	2,099,393	9.01	%
Fair Value	$	3,230,127			$	2,057,966

(1) Our debt and preferred equity investments had an estimated fair value ranging between $2.1 billion and $2.3 billion at December 31, 2018.

The table below presents the principal cash flows based upon maturity dates of our share of our joint venture debt obligations and the weighted-average interest rates by expected maturity dates as of December 31, 2018 (in thousands):

	Long Term Debt
	Fixed Rate		Average Interest Rate		Variable Rate		Average Interest Rate
2019	$	106,255	4.16	%	$	9,040	4.47	%
2020	11,236		4.16	%	267,555		4.45	%
2021	11,730		4.16	%	506,641		4.41	%
2022	220,779		4.12	%	31		4.70	%
2023	271,064		3.95	%	6,932		5.13	%
Thereafter	1,719,845		3.91	%	710,353		5.27	%
Total	$	2,340,909	4.12	%	$	1,500,552	4.55	%
Fair Value	$	2,327,716			$	1,510,470

65

The table below lists our consolidated derivative instruments, which are hedging variable rate debt, and their related fair values as of December 31, 2018 (in thousands):

	Asset Hedged	Benchmark Rate	Notional Value		Strike Rate		Effective Date	Expiration Date	Fair Value
Interest Rate Swap	Credit Facility	LIBOR	$	200,000	1.131	%	July 2016	July 2023	$	11,148
Interest Rate Swap	Credit Facility	LIBOR	100,000		1.161	%	July 2016	July 2023	5,447
Interest Rate Cap	Mortgage	LIBOR	137,500		4.000	%	September 2017	September 2019	—
Interest Rate Swap	Credit Facility	LIBOR	100,000		1.928	%	December 2017	November 2020	1,045
Interest Rate Swap	Credit Facility	LIBOR	100,000		1.934	%	December 2017	November 2020	1,035
Interest Rate Swap	Credit Facility	LIBOR	150,000		2.696	%	January 2019	January 2024	(1,858		)
Interest Rate Swap	Credit Facility	LIBOR	150,000		2.721	%	January 2019	January 2026	(2,450		)
Interest Rate Swap	Credit Facility	LIBOR	200,000		2.740	%	January 2019	January 2026	(3,354		)
Total Consolidated Hedges									$	11,013

In addition to these derivative instruments, some of our joint venture loan agreements require the joint venture to purchase interest rate caps on its debt. All such interest rate caps represented in aggregate an asset of $7.0 million at December 31, 2018. We also swapped certain floating rate debt at some of our joint ventures. These swaps represented in aggregate an asset of $11.1 million at December 31, 2018.

66

ITEM 8.    FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA

Index to Financial Statements and Schedules

FINANCIAL STATEMENTS OF SL GREEN REALTY CORP.
Report of Independent Registered Public Accounting Firm	68
Consolidated Balance Sheets as of December 31, 2018 and 2017	69
Consolidated Statements of Operations for the years ended December 31, 2018, 2017 and 2016	71
Consolidated Statements of Comprehensive Income for the years ended December 31, 2018, 2017 and 2016	72
Consolidated Statements of Equity for the years ended December 31, 2018, 2017 and 2016	73
Consolidated Statements of Cash Flows for the years ended December 31, 2018, 2017 and 2016	75
FINANCIAL STATEMENTS OF SL GREEN OPERATING PARTNERSHIP, L.P.
Report of Independent Registered Public Accounting Firm	78
Consolidated Balance Sheets as of December 31, 2018 and 2017	79
Consolidated Statements of Operations for the years ended December 31, 2018, 2017 and 2016	81
Consolidated Statements of Comprehensive Income for the years ended December 31, 2018, 2017 and 2016	82
Consolidated Statements of Capital for the years ended December 31, 2018, 2017 and 2016	83
Consolidated Statements of Cash Flows for the years ended December 31, 2018, 2017 and 2016	84
Notes to Consolidated Financial Statements	87
Schedules
Schedule II-Valuation and Qualifying Accounts for the years ended December 31, 2018, 2017 and 2016	134
Schedule III- Real Estate and Accumulated Depreciation as of December 31, 2018	135
All other schedules are omitted because they are not required or the required information is shown in the financial statements or notes thereto.

67

Report of Independent Registered Public Accounting Firm

To the Shareholders and the Board of Directors of SL Green Realty Corp.

Opinion on the Financial Statements

We have audited the accompanying consolidated balance sheets of SL Green Realty Corp. (the Company) as of December 31, 2018 and 2017, the related consolidated statements of operations, comprehensive income, equity and cash flows for each of the three years in the period ended December 31, 2018, and the related notes and financial statement schedules listed in the Index at Item 15(a)(2) (collectively referred to as the "consolidated financial statements"). In our opinion, the consolidated financial statements present fairly, in all material respects, the financial position of the Company at December 31, 2018 and 2017, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2018, in conformity with U.S. generally accepted accounting principles.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the Company's internal control over financial reporting as of December 31, 2018, based on criteria established in Internal Control-Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (2013 framework) and our report dated February 26, 2019 expressed an unqualified opinion thereon.

Basis for Opinion

These financial statements are the responsibility of the Company's management. Our responsibility is to express an opinion on the Company's financial statements based on our audits. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.

 /s/ Ernst & Young LLP

We have served as the Company‘s auditor since 1997.

New York, New York

February 26, 2019

68

SL Green Realty Corp.

Consolidated Balance Sheets

(in thousands, except per share data)

	December 31, 2018			December 31, 2017
Assets
Commercial real estate properties, at cost:
Land and land interests	$	1,774,899		$	2,357,051
Building and improvements	5,268,484			6,351,012
Building leasehold and improvements	1,423,107			1,450,614
Properties under capital lease	47,445			47,445
	8,513,935			10,206,122
Less: accumulated depreciation	(2,099,137		)	(2,300,116		)
	6,414,798			7,906,006
Assets held for sale	—			338,354
Cash and cash equivalents	129,475			127,888
Restricted cash	149,638			122,138
Investments in marketable securities	28,638			28,579
Tenant and other receivables, net of allowance of $15,702 and $18,637 in 2018 and 2017, respectively	41,589			57,644
Related party receivables	28,033			23,039
Deferred rents receivable, net of allowance of $15,457 and $17,207 in 2018 and 2017, respectively	335,985			365,337
Debt and preferred equity investments, net of discounts and deferred origination fees of $22,379 and $25,507 in 2018 and 2017, respectively, and allowance of $5,750 in 2018	2,099,393			2,114,041
Investments in unconsolidated joint ventures	3,019,020			2,362,989
Deferred costs, net	209,110			226,201
Other assets	295,679			310,688
Total assets (1)	$	12,751,358		$	13,982,904
Liabilities
Mortgages and other loans payable, net	$	1,961,240		$	2,837,282
Revolving credit facility, net	492,196			30,336
Unsecured term loans, net	1,493,051			1,491,575
Unsecured notes, net	1,495,214			1,395,939
Accrued interest payable	23,154			38,142
Other liabilities	116,566			188,005
Accounts payable and accrued expenses	147,060			137,142
Deferred revenue	94,453			208,119
Capital lease obligations	43,616			42,843
Deferred land leases payable	3,603			3,239
Dividend and distributions payable	80,430			85,138
Security deposits	64,688			67,927
Liabilities related to assets held for sale	—			4,074
Junior subordinated deferrable interest debentures held by trusts that issued trust preferred securities	100,000			100,000
Total liabilities (1)	6,115,271			6,629,761
Commitments and contingencies
Noncontrolling interests in Operating Partnership	387,805			461,954
Preferred units	300,427			301,735

69

SL Green Realty Corp.

Consolidated Balance Sheets

(in thousands, except per share data)

	December 31, 2018			December 31, 2017
Equity
SL Green stockholders' equity:
Series I Preferred Stock, $0.01 par value, $25.00 liquidation preference, 9,200 issued and outstanding at both December 31, 2018 and 2017	221,932			221,932
Common stock, $0.01 par value, 160,000 shares authorized and 84,739 and 93,858 issued and outstanding at December 31, 2018 and 2017, respectively (including 1,055 and 1,055 shares held in treasury at December 31, 2018 and 2017, respectively)	847			939
Additional paid-in-capital	4,508,685			4,968,338
Treasury stock at cost	(124,049		)	(124,049		)
Accumulated other comprehensive income	15,108			18,604
Retained earnings	1,278,998			1,139,329
Total SL Green stockholders' equity	5,901,521			6,225,093
Noncontrolling interests in other partnerships	46,334			364,361
Total equity	5,947,855			6,589,454
Total liabilities and equity	$	12,751,358		$	13,982,904
(1) The Company's consolidated balance sheets include assets and liabilities of consolidated variable interest entities ("VIEs"). See Note 2. The consolidated balance sheets include the following amounts related to our consolidated VIEs, excluding the Operating Partnership: $110.0 million and $398.0 million of land, $0.3 billion and $1.4 billion of building and improvements, $2.0 million and $2.0 million of building and leasehold improvements, $47.4 million and $47.4 million of properties under capital lease, $42.2 million and $330.9 million of accumulated depreciation, $721.3 million and $221.0 million of other assets included in other line items, $140.8 million and $628.9 million of real estate debt, net, $0.4 million and $2.5 million of accrued interest payable, $43.6 million and $42.8 million of capital lease obligations, and $18.4 million and $56.8 million of other liabilities included in other line items as of December 31, 2018 and December 31, 2017, respectively.

The accompanying notes are an integral part of these consolidated financial statements.

70

SL Green Realty Corp.

Consolidated Statements of Operations

(in thousands, except per share data)

	Year Ended December 31,
	2018			2017			2016
Revenues
Rental revenue, net	$	864,978		$	1,100,993		$	1,323,767
Escalation and reimbursement	113,596			172,939			196,858
Investment income	201,492			193,871			213,008
Other income	47,326			43,670			130,348
Total revenues	1,227,392			1,511,473			1,863,981
Expenses
Operating expenses, including $17,823 in 2018, $21,400 in 2017, $21,890 in 2016 of related party expenses	229,347			293,364			312,859
Real estate taxes	186,351			244,323			248,388
Ground rent	32,965			33,231			33,261
Interest expense, net of interest income	208,669			257,045			321,199
Amortization of deferred financing costs	12,408			16,498			24,564
Depreciation and amortization	279,507			403,320			821,041
Loan loss and other investment reserves, net of recoveries	6,839			—			—
Transaction related costs	1,099			(1,834		)	7,528
Marketing, general and administrative	92,631			100,498			99,759
Total expenses	1,049,816			1,346,445			1,868,599
Equity in net income from unconsolidated joint ventures	7,311			21,892			11,874
Equity in net gain on sale of interest in unconsolidated joint venture/real estate	303,967			16,166			44,009
Purchase price and other fair value adjustment	57,385			—			—
(Loss) gain on sale of real estate, net	(30,757		)	73,241			238,116
Depreciable real estate reserves and impairment	(227,543		)	(178,520		)	(10,387		)
Gain (loss) on sale of investment in marketable securities	—			3,262			(83		)
Loss on early extinguishment of debt	(17,083		)	—			—
Net income	270,856			101,069			278,911
Net (income) loss attributable to noncontrolling interests:
Noncontrolling interests in the Operating Partnership	(12,216		)	(3,995		)	(10,136		)
Noncontrolling interests in other partnerships	6			15,701			(7,644		)
Preferred units distributions	(11,384		)	(11,401		)	(11,235		)
Net income attributable to SL Green	247,262			101,374			249,896
Preferred stock redemption costs	—			—			—
Perpetual preferred stock dividends	(14,950		)	(14,950		)	(14,950		)
Net income attributable to SL Green common stockholders	$	232,312		$	86,424		$	234,946
Basic earnings per share:	$	2.67		$	0.87		$	2.34
Diluted earnings per share:	$	2.67		$	0.87		$	2.34
Basic weighted average common shares outstanding	86,753			98,571			100,185
Diluted weighted average common shares and common share equivalents outstanding	91,530			103,403			104,881

The accompanying notes are an integral part of these consolidated financial statements.

71

SL Green Realty Corp.

Consolidated Statements of Comprehensive Income

(in thousands)

	Year Ended December 31,
	2018			2017			2016
Net income	$	270,856		$	101,069		$	278,911
Other comprehensive income:
Change in net unrealized (loss) gain on derivative instruments, including SL Green's share of joint venture net unrealized (loss) gain on derivative instruments	(3,622		)	1,040			28,508
Change in unrealized gain (loss) on marketable securities	60			(4,667		)	3,677
Other comprehensive (loss) income	(3,562		)	(3,627		)	32,185
Comprehensive income	267,294			97,442			311,096
Net (income) loss attributable to noncontrolling interests and preferred units distributions	(23,594		)	305			(29,015		)
Other comprehensive income (loss) attributable to noncontrolling interests	66			94			(1,299		)
Comprehensive income attributable to SL Green	$	243,766		$	97,841		$	280,782

The accompanying notes are an integral part of these consolidated financial statements.

72

SL Green Realty Corp.

Consolidated Statements of Equity

(in thousands, except per share data)

	SL Green Realty Corp. Stockholders
				Common Stock
		Series I Preferred Stock		Shares		Par Value			Additional Paid- In-Capital			Treasury Stock			Accumulated Other Comprehensive Income (Loss)			Retained Earnings			Noncontrolling Interests			Total
Balance at December 31, 2015		$	221,932	99,976		$	1,001		$	5,439,735		$	(10,000	)	$	(8,749	)	$	1,643,546		$	431,852		$	7,719,317
Net income																		249,896			7,644			257,540
Other comprehensive income															30,886									30,886
Preferred dividends																		(14,950		)				(14,950		)
DRSPP proceeds				2					277															277
Conversion of units in the Operating Partnership to common stock				295		3			31,803															31,806
Reallocation of noncontrolling interest in the Operating Partnership																		(4,222		)				(4,222		)
Deferred compensation plan and stock awards, net of forfeitures and tax withholdings				96		1			23,901															23,902
Issuance of common stock						10			113,999			(114,049		)										(40		)
Proceeds from stock options exercised				193		2			14,830															14,832
Contributions to consolidated joint venture interests																					2,359			2,359
Cash distributions to noncontrolling interests																					(15,419		)	(15,419		)
Cash distributions declared ($2.94 per common share, none of which represented a return of capital for federal income tax purposes)																		(295,377		)				(295,377		)
Balance at December 31, 2016		221,932		100,562		1,017			5,624,545			(124,049		)	22,137			1,578,893			426,436			7,750,911
Net income (loss)																		101,374			(15,701		)	85,673
Other comprehensive loss															(3,533		)							(3,533		)
Preferred dividends																		(14,950		)				(14,950		)
DRSPP proceeds				2					223															223
Conversion of units in the Operating Partnership to common stock				202		2			21,572															21,574
Reallocation of noncontrolling interest in the Operating Partnership																		5,712						5,712
Equity component of repurchased exchangeable senior notes									(109,776		)													(109,776		)
Deferred compensation plan and stock awards, net of forfeitures and tax withholdings				87		1			29,786															29,787
Repurchases of common stock				(8,342	)	(83		)	(621,324		)							(226,641		)				(848,048		)
Proceeds from stock options exercised				292		2			23,312															23,314
Contributions to consolidated joint venture interests																					36,275			36,275
Deconsolidation of partially owned entity																					(30,203		)	(30,203		)
Cash distributions to noncontrolling interests																					(52,446		)	(52,446		)
Cash distributions declared ($3.1375 per common share, none of which represented a return of capital for federal income tax purposes)																		(305,059		)				(305,059		)
Balance at December 31, 2017		221,932		92,803		939			4,968,338			(124,049		)	18,604			1,139,329			364,361			6,589,454
Cumulative adjustment upon adoption of ASC 610-20																		570,524						570,524

73

SL Green Realty Corp.

Consolidated Statements of Equity

(in thousands, except per share data)

	SL Green Realty Corp. Stockholders
				Common Stock
		Series I Preferred Stock		Shares		Par Value			Additional Paid- In-Capital			Treasury Stock			Accumulated Other Comprehensive Income (Loss)			Retained Earnings			Noncontrolling Interests			Total
Balance at January 1, 2018		221,932		92,803		939			4,968,338			(124,049		)	18,604			1,709,853			364,361			7,159,978
Net income (loss)																		247,262			(6		)	247,256
Other comprehensive loss															(3,496		)							(3,496		)
Preferred dividends																		(14,950		)				(14,950		)
DRSPP proceeds				1					136															136
Conversion of units in the Operating Partnership to common stock				160		2			16,301															16,303
Reallocation of noncontrolling interest in the Operating Partnership																		34,236						34,236
Deferred compensation plan and stock awards, net of forfeitures and tax withholdings				149		1			17,483															17,484
Repurchases of common stock				(9,745	)	(98		)	(522,482		)							(415,215		)				(937,795		)
Proceeds from stock options exercised				316		3			28,909															28,912
Contributions to consolidated joint venture interests																					5,459			5,459
Deconsolidation of partially owned entity																					(315,116		)	(315,116		)
Cash distributions to noncontrolling interests																					(8,364		)	(8,364		)
Cash distributions declared ($3.2875 per common share, none of which represented a return of capital for federal income tax purposes)																		(282,188		)				(282,188		)
Balance at December 31, 2018		$	221,932	83,684		$	847		$	4,508,685		$	(124,049	)	$	15,108		$	1,278,998		$	46,334		$	5,947,855

The accompanying notes are an integral part of these consolidated financial statements.

74

SL Green Realty Corp.

Consolidated Statements of Cash Flows

(in thousands, except per share data)

	Year Ended December 31,
	2018			2017			2016
Operating Activities
Net income	$	270,856		$	101,069		$	278,911
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	291,915			419,818			845,605
Equity in net income from unconsolidated joint ventures	(7,311		)	(21,892		)	(11,874		)
Distributions of cumulative earnings from unconsolidated joint ventures	10,277			20,309			24,337
Equity in net gain on sale of interest in unconsolidated joint venture interest/real estate	(303,967		)	(16,166		)	(44,009		)
Purchase price and other fair value adjustment	(57,385		)	—			—
Depreciable real estate reserves and impairment	227,543			178,520			10,387
Loss (gain) on sale of real estate, net	30,757			(73,241		)	(238,116		)
Loan loss reserves and other investment reserves, net of recoveries	6,839			—			—
(Gain) loss on sale of investments in marketable securities	—			(3,262		)	83
Loss on early extinguishment of debt	17,083			—			—
Deferred rents receivable	(18,216		)	(38,009		)	26,716
Other non-cash adjustments (1)	2,932			19,621			(152,428		)
Changes in operating assets and liabilities:
Tenant and other receivables	6,968			(5,717		)	4,780
Related party receivables	(1,044		)	(7,209		)	(5,183		)
Deferred lease costs	(44,158		)	(41,939		)	(70,707		)
Other assets	(8,310		)	(23,068		)	9,899
Accounts payable, accrued expenses and other liabilities and security deposits	4,410			(12,440		)	(35,628		)
Deferred revenue and land leases payable	12,348			46,607			1,237
Net cash provided by operating activities	441,537			543,001			644,010
Investing Activities
Acquisitions of real estate property	(60,486		)	(28,680		)	(39,890		)
Additions to land, buildings and improvements	(254,460		)	(336,001		)	(411,950		)
Investments in unconsolidated joint ventures	(400,429		)	(389,249		)	(145,375		)
Distributions in excess of cumulative earnings from unconsolidated joint ventures	233,118			319,745			196,211
Proceeds from disposition of real estate/joint venture interest	1,231,004			692,796			2,475,954
Proceeds from sale of marketable securities	—			55,129			6,965
Purchases of marketable securities	—			—			(43,341		)
Other investments	(38,912		)	25,330			7,704
Origination of debt and preferred equity investments	(731,216		)	(1,129,970		)	(977,413		)
Repayments or redemption of debt and preferred equity investments	703,043			812,914			904,517
Net cash provided by investing activities	681,662			22,014			1,973,382

75

SL Green Realty Corp.

Consolidated Statements of Cash Flows

(in thousands, except per share data)

	Year Ended December 31,
	2018			2017			2016
Financing Activities
Proceeds from mortgages and other loans payable	$	564,391		$	870,459		$	408,293
Repayments of mortgages and other loans payable	(868,842		)	(902,460		)	(1,822,303		)
Proceeds from revolving credit facility, term loans and senior unsecured notes	3,120,000			2,784,599			1,325,300
Repayments of revolving credit facility, term loans and senior unsecured notes	(2,560,000		)	(2,276,782		)	(2,334,604		)
Payment of debt extinguishment costs	(13,918		)	—			—
Proceeds from stock options exercised and DRSPP issuance	29,048			23,537			15,109
Repurchase of common stock	(979,541		)	(806,302		)	—
Redemption of preferred stock	(1,208		)	(275		)	(3,299		)
Redemption of OP units	(33,972		)	—			—
Distributions to noncontrolling interests in other partnerships	(8,364		)	(52,446		)	(15,419		)
Contributions from noncontrolling interests in other partnerships	5,459			36,275			2,359
Distributions to noncontrolling interests in the Operating Partnership	(15,000		)	(14,266		)	(12,671		)
Dividends paid on common and preferred stock	(313,230		)	(333,543		)	(314,079		)
Other obligations related to mortgage loan participations	16			17,227			59,150
Payment of tax witholdings for restricted share awards	(3,842		)	(3,879		)	(3,162		)
Deferred loan costs and capitalized lease obligation	(15,109		)	(27,100		)	$	(41,076	)
Net cash used in by financing activities	(1,094,112		)	(684,956		)	(2,736,402		)
Net increase (decrease) in cash and cash equivalents	29,087			(119,941		)	(119,010		)
Cash, restricted cash, and cash equivalents at beginning of year	250,026			369,967			488,977
Cash, restricted cash, and cash equivalents at end of period	$	279,113		$	250,026		$	369,967
(1) Included in Other non-cash adjustments is $172.4 million for the year ended December 31, 2016 for the amortization of the below-market lease at 388-390 Greenwich Street as a result of the tenant exercising their option to purchase the property and entering into an agreement to accelerate the sale.
Supplemental cash flow disclosures:
Interest paid	$	259,776		$	273,819		$	344,295
Income taxes paid	$	1,418		$	2,448		$	2,009
Supplemental Disclosure of Non-Cash Investing and Financing Activities:
Issuance of units in the operating partnership	—			25,723			78,495
Redemption of units in the operating partnership	16,303			21,574			31,806
Redemption of units in the operating partnership for a joint venture sale	10,445			—			—
Exchange of debt investment for real estate or equity in joint venture	298,956			—			68,581
Issuance of preferred units relating to the real estate acquisition	—			—			22,793
Tenant improvements and capital expenditures payable	—			6,667			15,972
Fair value adjustment to noncontrolling interest in operating partnership	34,236			5,712			4,222
Deconsolidation of a subsidiary (1)	298,404			695,204			1,226,425
Transfer of assets to assets held for sale	—			611,809			2,048,376
Transfer of liabilities related to assets held for sale	—			5,364			1,677,528
Removal of fully depreciated commercial real estate properties	124,249			15,488			31,474
Issuance of SLG's common stock to a consolidated joint venture	—			—			114,049
Share repurchase payable	—			41,746			—
(1) $366.6 million of the 2017 amount relates to 1515 Broadway. In November 2017, the Company sold a 30.13% interest in 1515 Broadway to affiliates of Allianz Real Estate. The sale did not meet the criteria for sale accounting and as a result the property was accounted for under the profit sharing method. The Company achieved sale accounting upon adoption of ASC 610-20 in January 2018 and closed on the sale of an additional 12.87% interest in the property to Allianz in February 2018. See Note 6, "Investments in Unconsolidated Joint Ventures.".

In December 2018, 2017 and 2016, the Company declared quarterly distributions per share of $0.85, $0.8125 and $0.775, respectively. These distributions were paid in January 2019, 2018 and 2017, respectively.

76

SL Green Realty Corp.

Consolidated Statements of Cash Flows

(in thousands, except per share data)

The following table provides a reconciliation of cash, cash equivalents, and restricted cash reported within the consolidated balance sheets that sum to the total of the same such amounts shown in the consolidated statements of cash flows.

	Year Ended
	2018		2017		2016
Cash and cash equivalents	$	129,475	$	127,888	279,443
Restricted cash	149,638		122,138		90,524
Total cash, cash equivalents, and restricted cash	$	279,113	$	250,026	$	369,967

The accompanying notes are an integral part of these consolidated financial statements.

77

Report of Independent Registered Public Accounting Firm

To the Partners of SL Green Operating Partnership, L.P.

Opinion on the Financial Statements

We have audited the accompanying consolidated balance sheets of SL Green Operating Partnership, L.P. (the Operating Partnership) as of December 31, 2018 and 2017, the related consolidated statements of operations, comprehensive income, capital and cash flows for each of the three years in the period ended December 31, 2018, and the related notes and financial statement schedules listed in the Index at Item 15(a)(2) (collectively referred to as the "consolidated financial statements"). In our opinion, the consolidated financial statements present fairly, in all material respects, the financial position of the Operating Partnership at December 31, 2018 and 2017, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2018, in conformity with U.S. generally accepted accounting principles.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States)(PCAOB), the Operating Partnership's internal control over financial reporting as of December 31, 2018, based on criteria established in Internal Control-Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (2013 framework) and our report dated February 26, 2019 expressed an unqualified opinion thereon.

Basis for Opinion

These financial statements are the responsibility of the Operating Partnership's management. Our responsibility is to express an opinion on the Operating Partnership's financial statements based on our audits. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Operating Partnership in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.

/s/ Ernst & Young LLP

We have served as the Operating Partnership's auditor since 2010.

New York, New York

February 26, 2019

78

SL Green Operating Partnership, L.P.

Consolidated Balance Sheets

(in thousands, except per unit data)

	December 31, 2018			December 31, 2017
Assets
Commercial real estate properties, at cost:
Land and land interests	$	1,774,899		$	2,357,051
Building and improvements	5,268,484			6,351,012
Building leasehold and improvements	1,423,107			1,450,614
Property under capital lease	47,445			47,445
	8,513,935			10,206,122
Less: accumulated depreciation	(2,099,137		)	(2,300,116		)
	6,414,798			7,906,006
Assets held for sale	—			338,354
Cash and cash equivalents	129,475			127,888
Restricted cash	149,638			122,138
Investments in marketable securities	28,638			28,579
Tenant and other receivables, net of allowance of $15,702 and $18,637 in 2018 and 2017, respectively	41,589			57,644
Related party receivables	28,033			23,039
Deferred rents receivable, net of allowance of $15,457 and $17,207 in 2018 and 2017, respectively	335,985			365,337
Debt and preferred equity investments, net of discounts and deferred origination fees of $22,379 and $25,507 in 2018 and 2017, respectively, and allowance of $5,750 in 2018	2,099,393			2,114,041
Investments in unconsolidated joint ventures	3,019,020			2,362,989
Deferred costs, net	209,110			226,201
Other assets	295,679			310,688
Total assets (1)	$	12,751,358		$	13,982,904
Liabilities
Mortgages and other loans payable, net	$	1,961,240		$	2,837,282
Revolving credit facility, net	492,196			30,336
Unsecured term loans, net	1,493,051			1,491,575
Unsecured notes, net	1,495,214			1,395,939
Accrued interest payable	23,154			38,142
Other liabilities	116,566			188,005
Accounts payable and accrued expenses	147,060			137,142
Deferred revenue	94,453			208,119
Capital lease obligations	43,616			42,843
Deferred land leases payable	3,603			3,239
Dividend and distributions payable	80,430			85,138
Security deposits	64,688			67,927
Liabilities related to assets held for sale	—			4,074
Junior subordinated deferrable interest debentures held by trusts that issued trust preferred securities	100,000			100,000
Total liabilities (1)	6,115,271			6,629,761
Commitments and contingencies
Limited partner interests in SLGOP (4,131 and 4,453 limited partner common units outstanding at December 31, 2018 and 2017, respectively)	387,805			461,954
Preferred units	300,427			301,735

79

SL Green Operating Partnership, L.P.

Consolidated Balance Sheets

(in thousands, except per unit data)

	December 31, 2018		December 31, 2017
Capital
SLGOP partners' capital:
Series I Preferred Units, $25.00 liquidation preference, 9,200 issued and outstanding at both December 31, 2018 and 2017	221,932		221,932
SL Green partners' capital (878 and 973 general partner common units, and 82,806 and 91,831 limited partner common units outstanding at December 31, 2018 and 2017, respectively)	5,664,481		5,984,557
Accumulated other comprehensive income	15,108		18,604
Total SLGOP partners' capital	5,901,521		6,225,093
Noncontrolling interests in other partnerships	46,334		364,361
Total capital	5,947,855		6,589,454
Total liabilities and capital	$	12,751,358	$	13,982,904
(1) The Operating Partnership's consolidated balance sheets include assets and liabilities of consolidated variable interest entities ("VIEs"). See Note 2. The consolidated balance sheets include the following amounts related to our consolidated VIEs: $110.0 million and $398.0 million of land, $0.3 billion and $1.4 billion of building and improvements, $2.0 million and $2.0 million of building and leasehold improvements, $47.4 million and $47.4 million of properties under capital lease, $42.2 million and $330.9 million of accumulated depreciation, $721.3 million and $221.0 million of other assets included in other line items, $140.8 million and $628.9 million of real estate debt, net, $0.4 million and $2.5 million of accrued interest payable, $43.6 million and $42.8 million of capital lease obligations, and $18.4 million and $56.8 million of other liabilities included in other line items as of December 31, 2018 and December 31, 2017, respectively.

The accompanying notes are an integral part of these consolidated financial statements.

80

SL Green Operating Partnership, L.P.

Consolidated Statements of Operations

(in thousands, except per unit data)

	Year Ended December 31,
	2018			2017			2016
Revenues
Rental revenue, net	$	864,978		$	1,100,993		$	1,323,767
Escalation and reimbursement	113,596			172,939			196,858
Investment income	201,492			193,871			213,008
Other income	47,326			43,670			130,348
Total revenues	1,227,392			1,511,473			1,863,981
Expenses
Operating expenses, including $17,823 in 2018, $21,400 in 2017, $21,890 in 2016 of related party expenses	229,347			293,364			312,859
Real estate taxes	186,351			244,323			248,388
Ground rent	32,965			33,231			33,261
Interest expense, net of interest income	208,669			257,045			321,199
Amortization of deferred financing costs	12,408			16,498			24,564
Depreciation and amortization	279,507			403,320			821,041
Loan loss and other investment reserves, net of recoveries	6,839			—			—
Transaction related costs	1,099			(1,834		)	7,528
Marketing, general and administrative	92,631			100,498			99,759
Total expenses	1,049,816			1,346,445			1,868,599
Equity in net income from unconsolidated joint ventures	7,311			21,892			11,874
Equity in net gain on sale of interest in unconsolidated joint venture/real estate	303,967			16,166			44,009
Purchase price and other fair value adjustment	57,385			—			—
(Loss) gain on sale of real estate, net	(30,757		)	73,241			238,116
Depreciable real estate reserves and impairment	(227,543		)	(178,520		)	(10,387		)
Gain (loss) on sale of investment in marketable securities	—			3,262			(83		)
Loss on early extinguishment of debt	(17,083		)	—			—
Net income	270,856			101,069			278,911
Net (income) loss attributable to noncontrolling interests in other partnerships	6			15,701			(7,644		)
Preferred unit distributions	(11,384		)	(11,401		)	(11,235		)
Net income attributable to SLGOP	259,478			105,369			260,032
Preferred stock redemption costs	—			—			—
Perpetual preferred stock dividends	(14,950		)	(14,950		)	(14,950		)
Net income attributable to SLGOP common unitholders	$	244,528		$	90,419		$	245,082
Basic earnings per unit:	$	2.67		$	0.87		$	2.34
Diluted earnings per unit:	$	2.67		$	0.87		$	2.34
Basic weighted average common units outstanding	91,315			103,127			104,508
Diluted weighted average common units and common unit equivalents outstanding	91,530			103,403			104,881

The accompanying notes are an integral part of these consolidated financial statements.

81

SL Green Operating Partnership, L.P.

Consolidated Statements of Comprehensive Income

(in thousands)

	Year Ended December 31,
	2018			2017			2016
Net income	$	270,856		$	101,069		$	278,911
Other comprehensive income:
Change in net unrealized (loss) gain on derivative instruments, including SLGOP's share of joint venture net unrealized (loss) gain on derivative instruments	(3,622		)	1,040			28,508
Change in unrealized gain (loss) on marketable securities	60			(4,667		)	3,677
Other comprehensive (loss) income	(3,562		)	(3,627		)	32,185
Comprehensive income	267,294			97,442			311,096
Net loss (income) attributable to noncontrolling interests	6			15,701			(7,644		)
Other comprehensive income (loss) attributable noncontrolling interests	66			94			(1,299		)
Comprehensive income attributable to SLGOP	$	267,366		$	113,237		$	302,153

The accompanying notes are an integral part of these consolidated financial statements.

82

SL Green Operating Partnership, L.P.

Consolidated Statements of Capital

(in thousands, except per unit data)

	SL Green Operating Partnership Unitholders
			Partners' Interest
	Series I Preferred Units		Common Units		Common Unitholders			Accumulated Other Comprehensive (Loss) Income			Noncontrolling Interests			Total
Balance at December 31, 2015	$	221,932	99,976		$	7,074,282		$	(8,749	)	$	431,852		$	7,719,317
Net income					249,896						7,644			257,540
Other comprehensive income								30,886						30,886
Preferred dividends					(14,950		)							(14,950		)
DRSPP proceeds			2		277									277
Conversion of common units			295		31,806									31,806
Reallocation of noncontrolling interests in the operating partnership					(4,222		)							(4,222		)
Deferred compensation plan and stock awards, net of forfeitures and tax withholdings			96		23,902									23,902
Issuance of stock					(40		)							(40		)
Contributions to consolidated joint venture interests											2,359			2,359
Proceeds from stock options exercised			193		14,832									14,832
Cash distributions to noncontrolling interests											(15,419		)	(15,419		)
Cash distributions declared ($2.94 per common unit, none of which represented a return of capital for federal income tax purposes)					(295,377		)							(295,377		)
Balance at December 31, 2016	221,932		100,562		7,080,406			22,137			426,436			7,750,911
Net income (loss)					101,374						(15,701		)	85,673
Other comprehensive loss								(3,533		)				(3,533		)
Preferred dividends					(14,950		)							(14,950		)
DRSPP proceeds			2		223									223
Conversion of common units			202		21,574									21,574
Reallocation of noncontrolling interests in the operating partnership					5,712									5,712
Equity component of repurchased exchangeable senior notes					(109,776		)							(109,776		)
Deferred compensation plan and stock awards, net of forfeitures and tax withholdings			87		29,787									29,787
Repurchases of common units			(8,342	)	(848,048		)							(848,048		)
Proceeds from stock options exercised			292		$	23,314								23,314
Contributions to consolidated joint venture interests											36,275			36,275
Deconsolidation of partially owned entity											(30,203		)	(30,203		)
Cash distributions to noncontrolling interests											(52,446		)	(52,446		)
Cash distributions declared ($3.1375 per common unit, none of which represented a return of capital for federal income tax purposes)					(305,059		)							(305,059		)
Balance at December 31, 2017	221,932		92,803		5,984,557			18,604			364,361			6,589,454
Cumulative adjustment upon adoption of ASC 610-20					570,524									570,524
Balance at January 1, 2018	221,932		92,803		6,555,081			18,604			364,361			7,159,978
Net income (loss)					247,262						(6		)	247,256
Other comprehensive loss								(3,496		)				(3,496		)
Preferred dividends					(14,950		)							(14,950		)
DRSPP proceeds			1		136									136
Conversion of common units			160		16,303									16,303
Reallocation of noncontrolling interest in the Operating Partnership					34,236									34,236
Deferred compensation plan and stock awards, net of forfeitures and tax withholdings			149		17,484									17,484
Repurchases of common units			(9,745	)	(937,795		)							(937,795		)
Proceeds from stock options exercised			316		28,912									28,912
Contributions to consolidated joint venture interests											5,459			5,459
Deconsolidation of partially owned entity											(315,116		)	(315,116		)
Cash distributions to noncontrolling interests											(8,364		)	(8,364		)
Cash distributions declared ($3.2875 per common unit, none of which represented a return of capital for federal income tax purposes)					(282,188		)							(282,188		)
Balance at December 31, 2018	$	221,932	83,684		$	5,664,481		$	15,108		$	46,334		$	5,947,855

83

SL Green Operating Partnership, L.P.

Consolidated Statements of Cash Flows

(in thousands)

	Year Ended December 31,
	2018			2017			2016
Operating Activities
Net income	$	270,856		$	101,069		$	278,911
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	291,915			419,818			845,605
Equity in net income from unconsolidated joint ventures	(7,311		)	(21,892		)	(11,874		)
Distributions of cumulative earnings from unconsolidated joint ventures	10,277			20,309			24,337
Equity in net gain on sale of interest in unconsolidated joint venture interest/real estate	(303,967		)	(16,166		)	(44,009		)
Purchase price and other fair value adjustment	(57,385		)	—			—
Depreciable real estate reserves and impairment	227,543			178,520			10,387
Loss (gain) on sale of real estate, net	30,757			(73,241		)	(238,116		)
Loan loss reserves and other investment reserves, net of recoveries	6,839			—			—
(Gain) loss on sale of investments in marketable securities	—			(3,262		)	83
Loss on early extinguishment of debt	17,083			—			—
Deferred rents receivable	(18,216		)	(38,009		)	26,716
Other non-cash adjustments (1)	2,932			19,621			(152,428		)
Changes in operating assets and liabilities:
Tenant and other receivables	6,968			(5,717		)	4,780
Related party receivables	(1,044		)	(7,209		)	(5,183		)
Deferred lease costs	(44,158		)	(41,939		)	(70,707		)
Other assets	(8,310		)	(23,068		)	9,899
Accounts payable, accrued expenses and other liabilities and security deposits	4,410			(12,440		)	(35,628		)
Deferred revenue and land leases payable	12,348			46,607			1,237
Net cash provided by operating activities	441,537			543,001			644,010
Investing Activities
Acquisitions of real estate property	(60,486		)	(28,680		)	(39,890		)
Additions to land, buildings and improvements	(254,460		)	(336,001		)	(411,950		)
Investments in unconsolidated joint ventures	(400,429		)	(389,249		)	(145,375		)
Distributions in excess of cumulative earnings from unconsolidated joint ventures	233,118			319,745			196,211
Net proceeds from disposition of real estate/joint venture interest	1,231,004			692,796			2,475,954
Proceeds from sale of marketable securities	—			55,129			6,965
Purchases of marketable securities	—			—			(43,341		)
Other investments	(38,912		)	25,330			7,704
Origination of debt and preferred equity investments	(731,216		)	(1,129,970		)	(977,413		)
Repayments or redemption of debt and preferred equity investments	703,043			812,914			904,517
Net cash provided by investing activities	681,662			22,014			1,973,382

84

SL Green Operating Partnership, L.P.

Consolidated Statements of Cash Flows

(in thousands)

	Year Ended December 31,
	2018			2017			2016
Financing Activities
Proceeds from mortgages and other loans payable	$	564,391		$	870,459		$	408,293
Repayments of mortgages and other loans payable	(868,842		)	(902,460		)	(1,822,303		)
Proceeds from revolving credit facility, term loans and senior unsecured notes	3,120,000			2,784,599			1,325,300
Repayments of revolving credit facility, term loans and senior unsecured notes	(2,560,000		)	(2,276,782		)	(2,334,604		)
Payments of debt extinguishment costs	(13,918		)	—			—
Proceeds from stock options exercised and DRSPP issuance	29,048			23,537			15,109
Repurchase of common stock	(979,541		)	(806,302		)	—
Redemption of preferred units	(1,208		)	(275		)	(3,299		)
Redemption of OP units	(33,972		)	—			—
Distributions to noncontrolling interests in other partnerships	(8,364		)	(52,446		)	(15,419		)
Contributions from noncontrolling interests in other partnerships	5,459			36,275			2,359
Distributions paid on common and preferred units	(328,230		)	(347,809		)	(326,750		)
Other obligations related to mortgage loan participations	16			17,227			59,150
Payment of tax witholdings for restricted share awards	(3,842		)	(3,879		)	(3,162		)
Deferred loan costs and capitalized lease obligation	(15,109		)	(27,100		)	(41,076		)
Net cash used in by financing activities	(1,094,112		)	(684,956		)	(2,736,402		)
Net increase (decrease) in cash and cash equivalents	29,087			(119,941		)	(119,010		)
Cash, restricted cash, and cash equivalents at beginning of year	250,026			369,967			488,977
Cash, restricted cash, and cash equivalents at end of period	$	279,113		$	250,026		$	369,967
(1) Included in Other non-cash adjustments is $172.4 million for the year ended December 31, 2016 for the amortization of the below-market lease at 388-390 Greenwich Street as a result of the tenant exercising their option to purchase the property and entering into an agreement to accelerate the sale.
Supplemental cash flow disclosures:
Interest paid	$	259,776		$	273,819		$	344,295
Income taxes paid	$	1,418		$	2,448		$	2,009
Supplemental Disclosure of Non-Cash Investing and Financing Activities:
Issuance of units in the operating partnership	—			25,723			78,495
Redemption of units in the operating partnership	16,303			21,574			31,806
Redemption of units in the operating partnership for a joint venture sale	10,445			—			—
Exchange of debt investment for equity in joint venture	298,956			—			68,581
Issuance of preferred units relating to the real estate acquisition	—			—			22,793
Tenant improvements and capital expenditures payable	—			6,667			15,972
Fair value adjustment to noncontrolling interest in the operating partnership	34,236			5,712			4,222
Deconsolidation of a subsidiary (1)	298,404			695,204			1,226,425
Transfer of assets to assets held for sale	—			611,809			2,048,376
Transfer of liabilities related to assets held for sale	—			5,364			1,677,528
Removal of fully depreciated commercial real estate properties	124,249			15,488			31,474
Issuance of SLG's common stock to a consolidated joint venture	—			—			114,049
Share repurchase payable	—			41,746			—
(1) $366.6 million of the 2017 amount relates to 1515 Broadway. In November 2017, the Company sold a 30.13% interest in 1515 Broadway to affiliates of Allianz Real Estate. The sale did not meet the criteria for sale accounting and as a result the property was accounted for under the profit sharing method. The Company achieved sale accounting upon adoption of ASC 610-20 in January 2018 and closed on the sale of an additional 12.87% interest in the property to Allianz in February 2018. See Note 6, "Investments in Unconsolidated Joint Ventures.".

In December 2018, 2017 and 2016, SLGOP declared quarterly distributions per common unit of $0.85, $0.8125 and $0.775, respectively. These distributions were paid in January 2019, 2018 and 2017, respectively.

85

SL Green Operating Partnership, L.P.

Consolidated Statements of Cash Flows

(in thousands)

The following table provides a reconciliation of cash, cash equivalents, and restricted cash reported within the consolidated balance sheets that sum to the total of the same such amounts shown in the consolidated statements of cash flows.

	Year Ended
	2018		2017		2016
Cash and cash equivalents	$	129,475	$	127,888	279,443
Restricted cash	149,638		122,138		90,524
Total cash, cash equivalents, and restricted cash	$	279,113	$	250,026	$	369,967

The accompanying notes are an integral part of these consolidated financial statements.

86

SL Green Realty Corp. and SL Green Operating Partnership, L.P.

Notes to Consolidated Financial Statements

December 31, 2018

1. Organization and Basis of Presentation

SL Green Realty Corp., which is referred to as the Company or SL Green, a Maryland corporation, and SL Green Operating Partnership, L.P., which is referred to as SLGOP or the Operating Partnership, a Delaware limited partnership, were formed in June 1997 for the purpose of combining the commercial real estate business of S.L. Green Properties, Inc. and its affiliated partnerships and entities. The Operating Partnership received a contribution of interest in the real estate properties, as well as 95% of the economic interest in the management, leasing and construction companies which are referred to as the Service Corporation. All of the management, leasing and construction services that are provided to the properties that are wholly-owned by us and that are provided to certain joint ventures are conducted through SL Green Management LLC which is 100% owned by the Operating Partnership. The Company has qualified, and expects to qualify in the current fiscal year, as a real estate investment trust, or REIT, under the Internal Revenue Code of 1986, as amended, or the Code, and operates as a self-administered, self-managed REIT. A REIT is a legal entity that holds real estate interests and, through payments of dividends to stockholders, is permitted to minimize the payment of Federal income taxes at the corporate level. Unless the context requires otherwise, all references to "we," "our" and "us" means the Company and all entities owned or controlled by the Company, including the Operating Partnership.

Substantially all of our assets are held by, and all of our operations are conducted through, the Operating Partnership. The Company is the sole managing general partner of the Operating Partnership. As of December 31, 2018, noncontrolling investors held, in the aggregate, a 4.70% limited partnership interest in the Operating Partnership. We refer to these interests as the noncontrolling interests in the Operating Partnership. The Operating Partnership is considered a variable interest entity, or VIE, in which we are the primary beneficiary. See Note 11, "Noncontrolling Interests on the Company's Consolidated Financial Statements."

Reckson Associates Realty Corp., or Reckson, and Reckson Operating Partnership, L.P., or ROP, are wholly-owned subsidiaries of SL Green Realty Corp.

As of December 31, 2018, we owned the following interests in properties in the New York metropolitan area, primarily in midtown Manhattan. Our investments located outside of Manhattan are referred to as the Suburban properties:

		Consolidated			Unconsolidated		Total
Location	Property Type	Number of Properties		Approximate Square Feet (unaudited)	Number of Properties	Approximate Square Feet (unaudited)	Number of Properties	Approximate Square Feet (unaudited)	Weighted Average Occupancy(1) (unaudited)
Commercial:
Manhattan	Office	20		12,387,091	10	11,329,183	30	23,716,274	94.5	%
	Retail	7	(2)	325,648	9	352,174	16	677,822	96.7	%
	Development/Redevelopment	5		486,101	2	347,000	7	833,101	54.1	%
	Fee Interest	—		—	1	—	1	—	—	%
		32		13,198,840	22	12,028,357	54	25,227,197	93.2	%
Suburban	Office	13		2,295,200	—	—	13	2,295,200	91.3	%
	Retail	1		52,000	—	—	1	52,000	100.0	%
	Development/Redevelopment	1		1,000	—	—	1	1,000	—	%
		15		2,348,200	—	—	15	2,348,200	91.4	%
Total commercial properties		47		15,547,040	22	12,028,357	69	27,575,397	93.1	%
Residential:
Manhattan	Residential	2	(2)	445,105	10	2,156,751	12	2,601,856	91.5	%
Suburban	Residential	—		—	—	—	—	—	—	%
Total residential properties		2		445,105	10	2,156,751	12	2,601,856	91.5	%
Total portfolio		49		15,992,145	32	14,185,108	81	30,177,253	92.9	%

(1) The weighted average occupancy for commercial properties represents the total occupied square feet divided by total square footage at acquisition.  The weighted average occupancy for residential properties represents the total occupied units divided by total available units.

87

SL Green Realty Corp. and SL Green Operating Partnership, L.P.

Notes to Consolidated Financial Statements (cont.)

December 31, 2018

(2) As of December 31, 2018, we owned a building at 315 West 33rd Street, also known as The Olivia, that was comprised of approximately 270,132 square feet (unaudited) of retail space and approximately 222,855 square feet (unaudited) of residential space. For the purpose of this report, we have included this building in the number of retail properties we own. However, we have included only the retail square footage in the retail approximate square footage, and have listed the balance of the square footage as residential square footage.

As of December 31, 2018, we also managed two office buildings owned by third parties encompassing approximately 2.1 million square feet (unaudited) and held debt and preferred equity investments with a book value of $2.1 billion, including $0.1 billion of debt and preferred equity investments and other financing receivables that are included in balance sheet line items other than the Debt and Preferred Equity Investments line item.

Partnership Agreement

In accordance with the partnership agreement of the Operating Partnership, or the Operating Partnership Agreement, we allocate all distributions and profits and losses in proportion to the percentage of ownership interests of the respective partners. As the managing general partner of the Operating Partnership, we are required to take such reasonable efforts, as determined by us in our sole discretion, to cause the Operating Partnership to distribute sufficient amounts to enable the payment of sufficient dividends by us to minimize any Federal income or excise tax at the Company level. Under the Operating Partnership Agreement, each limited partner has the right to redeem units of limited partnership interests for cash, or if we so elect, shares of SL Green's common stock on a one-for-one basis.

2. Significant Accounting Policies

Principles of Consolidation

The consolidated financial statements include our accounts and those of our subsidiaries, which are wholly-owned or controlled by us. Entities which we do not control through our voting interest and entities which are variable interest entities, but where we are not the primary beneficiary, are accounted for under the equity method. See Note 5, "Debt and Preferred Equity Investments" and Note 6, "Investments in Unconsolidated Joint Ventures." All significant intercompany balances and transactions have been eliminated.

We consolidate a VIE in which we are considered the primary beneficiary. The primary beneficiary is the entity that has (i) the power to direct the activities that most significantly impact the entity's economic performance and (ii) the obligation to absorb losses of the VIE or the right to receive benefits from the VIE that could be significant to the VIE.

A noncontrolling interest in a consolidated subsidiary is defined as the portion of the equity (net assets) in a subsidiary not attributable, directly or indirectly, to us. Noncontrolling interests are required to be presented as a separate component of equity in the consolidated balance sheet and the presentation of net income is modified to present earnings and other comprehensive income attributed to controlling and noncontrolling interests.

We assess the accounting treatment for each joint venture and debt and preferred equity investment. This assessment includes a review of each joint venture or limited liability company agreement to determine the rights provided to each party and whether those rights are protective or participating. For all VIEs, we review such agreements in order to determine which party has the power to direct the activities that most significantly impact the entity's economic performance. In situations where we and our partner approve, among other things, the annual budget, receive a detailed monthly reporting package, meet on a quarterly basis to review the results of the joint venture, review and approve the joint venture's tax return before filing, and approve all leases that cover more than a nominal amount of space relative to the total rentable space at each property, we do not consolidate the joint venture as we consider these to be substantive participation rights that result in shared power of the activities that most significantly impact the performance of the joint venture. Our joint venture agreements typically contain certain protective rights such as requiring partner approval to sell, finance or refinance the property and the payment of capital expenditures and operating expenditures outside of the approved budget or operating plan.

Investment in Commercial Real Estate Properties

Real estate properties are presented at cost less accumulated depreciation and amortization. Costs directly related to the development or redevelopment of properties are capitalized. Ordinary repairs and maintenance are expensed as incurred; major replacements and betterments, which improve or extend the life of the asset, are capitalized and depreciated over their estimated useful lives.

We recognize the assets acquired, liabilities assumed (including contingencies) and any noncontrolling interests in an acquired entity at their respective fair values on the acquisition date. When we acquire our partner's equity interest in an existing unconsolidated joint venture and gain control over the investment, we record the consolidated investment at fair value. The difference between the book value of our equity investment on the purchase date and our share of the fair value of the investment's purchase

88

SL Green Realty Corp. and SL Green Operating Partnership, L.P.

Notes to Consolidated Financial Statements (cont.)

December 31, 2018

price is recorded as a purchase price fair value adjustment in our consolidated statements of operations. See Note 3, "Property Acquisitions."

We allocate the purchase price of real estate to land and building (inclusive of tenant improvements) and, if determined to be material, intangibles, such as the value of above- and below-market leases and origination costs associated with the in-place leases. We depreciate the amount allocated to building (inclusive of tenant improvements) over their estimated useful lives, which generally range from three to 40 years. We amortize the amount allocated to the above- and below-market leases over the remaining term of the associated lease, which generally range from one to 14 years, and record it as either an increase (in the case of below-market leases) or a decrease (in the case of above-market leases) to rental income. We amortize the amount allocated to the values associated with in-place leases over the expected term of the associated lease, which generally ranges from one to 14 years. If a tenant vacates its space prior to the contractual termination of the lease and no rental payments are being made on the lease, any unamortized balance of the related intangible will be written off. The tenant improvements and origination costs are amortized as an expense over the remaining life of the lease (or charged against earnings if the lease is terminated prior to its contractual expiration date). We assess fair value of the leases based on estimated cash flow projections that utilize appropriate discount and capitalization rates and available market information. Estimates of future cash flows are based on a number of factors including the historical operating results, known trends, and market/economic conditions that may affect the property. To the extent acquired leases contain fixed rate renewal options that are below-market and determined to be material, we amortize such below-market lease value into rental income over the renewal period. As of December 31, 2018, the weighted average amortization period for above-market leases, below-market leases, and in-place lease costs is 1.8 years, 4.6 years, and 5.8 years, respectively.

We incur a variety of costs in the development and leasing of our properties. After the determination is made to capitalize a cost, it is allocated to the specific component of a project that is benefited. Determination of when a development project is substantially complete and capitalization must cease involves a degree of judgment. The costs of land and building under development include specifically identifiable costs. The capitalized costs include, but are not limited to, pre-construction costs essential to the development of the property, development costs, construction costs, interest costs, real estate taxes, salaries and related costs and other costs incurred during the period of development. We consider a construction project as substantially completed and held available for occupancy upon the completion of tenant improvements, but no later than one year after major construction activity ceases. We cease capitalization on the portions substantially completed and occupied or held available for occupancy, and capitalize only those costs associated with the portions under construction.

Properties are depreciated using the straight-line method over the estimated useful lives of the assets. The estimated useful lives are as follows:

Category	Term
Building (fee ownership)	40 years
Building improvements	shorter of remaining life of the building or useful life
Building (leasehold interest)	lesser of 40 years or remaining term of the lease
Property under capital lease	remaining lease term
Furniture and fixtures	four to seven years
Tenant improvements	shorter of remaining term of the lease or useful life

Depreciation expense (including amortization of capital lease assets) totaled $242.8 million, $365.3 million, and $783.5 million for the years ended December 31, 2018, 2017 and 2016, respectively.

On a periodic basis, we assess whether there are any indications that the value of our real estate properties may be impaired or that their carrying value may not be recoverable. A property's value is considered impaired if management's estimate of the aggregate future cash flows (undiscounted) to be generated by the property is less than the carrying value of the property. To the extent impairment has occurred, the loss will be measured as the excess of the carrying amount of the property over the calculated fair value of the property.

We also evaluate our real estate properties for impairment when a property has been classified as held for sale. Real estate assets held for sale are valued at the lower of their carrying value or fair value less costs to sell and depreciation expense is no longer recorded.

We recognized $6.8 million, $20.3 million, and $196.2 million of rental revenue for the years ended December 31, 2018, 2017, and 2016 respectively, for the amortization of aggregate below-market leases in excess of above-market leases and a reduction in lease origination costs, resulting from the allocation of the purchase price of the applicable properties. Included in rental revenue

89

SL Green Realty Corp. and SL Green Operating Partnership, L.P.

Notes to Consolidated Financial Statements (cont.)

December 31, 2018

for the year ended December 31, 2016 is $172.4 million related to the amortization of below-market leases at 388-390 Greenwich Street as a result of the tenant exercising their option to purchase the property and entering into an agreement to accelerate the sale.

We recognized as a reduction to interest expense the amortization of the above-market rate mortgages assumed of $0.0 million, $0.8 million, and $2.8 million for the years ended December 31, 2018, 2017 and 2016, respectively.

The following summarizes our identified intangible assets (acquired above-market leases and in-place leases) and intangible liabilities (acquired below-market leases) as of December 31, 2018 and 2017 (in thousands):

	December 31,
	2018			2017
Identified intangible assets (included in other assets):
Gross amount	$	266,540		$	325,880
Accumulated amortization	(241,040		)	(277,038		)
Net(1)	$	25,500		$	48,842
Identified intangible liabilities (included in deferred revenue):
Gross amount	$	276,245		$	540,283
Accumulated amortization	(253,767		)	(402,583		)
Net(1)	$	22,478		$	137,700

(1) As of December 31, 2018, no net intangible assets and no net intangible liabilities were reclassified to assets held for sale and liabilities related to assets held for sale. As of December 31, 2017, $13.9 million net intangible assets and $4.1 million net intangible liabilities were reclassified to assets held for sale and liabilities related to assets held for sale.

The estimated annual amortization of acquired above-market leases, net of acquired (below-market) leases (a component of rental revenue), for each of the five succeeding years is as follows (in thousands):

2019	$	(5,227	)
2020	(3,655		)
2021	(1,631		)
2022	(1,328		)
2023	(749		)

The estimated annual amortization of all other identifiable assets (a component of depreciation and amortization expense) including tenant improvements for each of the five succeeding years is as follows (in thousands):

2019	$	9,825
2020	4,817
2021	3,454
2022	1,892
2023	1,507

Cash and Cash Equivalents

We consider all highly liquid investments with maturity of three months or less when purchased to be cash equivalents.

Restricted Cash

Restricted cash primarily consists of security deposits held on behalf of our tenants, interest reserves, as well as capital improvement and real estate tax escrows required under certain loan agreements.

Fair Value Measurements

See Note 16, "Fair Value Measurements."

90

SL Green Realty Corp. and SL Green Operating Partnership, L.P.

Notes to Consolidated Financial Statements (cont.)

December 31, 2018

Investment in Marketable Securities

At acquisition, we designate a security as held-to-maturity, available-for-sale, or trading. As of December 31, 2018, we did not have any securities designated as held-to-maturity or trading. We account for our available-for-sale securities at fair value pursuant to Accounting Standards Codification, or ASC, 820-10, with the net unrealized gains or losses reported as a component of accumulated other comprehensive income or loss. The cost of marketable securities sold and the amount reclassified out of accumulated other comprehensive income into earnings is determined using the specific identification method. Any unrealized losses that are determined to be other-than-temporary are recognized in earnings up to their credit component.

The Company adopted ASU 2016-01 effective January 1, 2018 which required entities to measure investments in equity securities at fair value and recognize any changes in fair value in net income. Upon adoption we did not hold investments in equity securities and therefore did not record a cumulative-effect adjustment. We did not hold investments in equity securities as of December 31, 2018.

At December 31, 2018 and 2017, we held the following marketable securities (in thousands):

	December 31,
	2018		2017
Commercial mortgage-backed securities	$	28,638	$	28,579
Total marketable securities available-for-sale	$	28,638	$	28,579

The cost basis of the commercial mortgage-backed securities was $27.5 million and $27.5 million at December 31, 2018 and 2017, respectively. These securities mature at various times through 2035. We held no equity marketable securities at December 31, 2018 and 2017.

During the year ended December 31, 2018, we did not dispose of any marketable securities.

During the year ended December 31, 2017, we disposed of marketable securities for aggregate net proceeds of $55.1 million and realized a loss of $3.3 million, which is included in gain (loss) on sale of investment in marketable securities on the consolidated statements of operations.

During the year ended December 31, 2016, we disposed of marketable securities for aggregate net proceeds of $7.0 million and realized a loss of $0.1 million, which is included in gain (loss) on sale of investment in marketable securities on the consolidated statements of operations.

Investments in Unconsolidated Joint Ventures

We account for our investments in unconsolidated joint ventures under the equity method of accounting in cases where we exercise significant influence over, but do not control, these entities and are not considered to be the primary beneficiary. We consolidate those joint ventures that we control or which are VIEs and where we are considered to be the primary beneficiary. In all these joint ventures, the rights of the joint venture partner are both protective as well as participating. Unless we are determined to be the primary beneficiary in a VIE, these participating rights preclude us from consolidating these VIE entities. These investments are recorded initially at cost, as investments in unconsolidated joint ventures, and subsequently adjusted for equity in net income (loss) and cash contributions and distributions. Equity in net income (loss) from unconsolidated joint ventures is allocated based on our ownership or economic interest in each joint venture and includes adjustments related to basis differences that were identified as part of the initial accounting for the investment. When a capital event (as defined in each joint venture agreement) such as a refinancing occurs, if return thresholds are met, future equity income will be allocated at our increased economic interest. We recognize incentive income from unconsolidated real estate joint ventures as income to the extent it is earned and not subject to a clawback feature. Distributions we receive from unconsolidated real estate joint ventures in excess of our basis in the investment are recorded as offsets to our investment balance if we remain liable for future obligations of the joint venture or may otherwise be committed to provide future additional financial support. None of the joint venture debt is recourse to us. The Company has performance guarantees under a master lease at one joint venture. See Note 6, "Investments in Unconsolidated Joint Ventures."

We assess our investments in unconsolidated joint ventures for recoverability, and if it is determined that a loss in value of the investment is other than temporary, we write down the investment to its fair value. We evaluate our equity investments for impairment based on the joint ventures' projected discounted cash flows. We do not believe that the values of any of our equity investments were impaired at December 31, 2018.

We may originate loans for real estate acquisition, development and construction, where we expect to receive some of the residual profit from such projects. When the risk and rewards of these arrangements are essentially the same as an investor or joint

91

SL Green Realty Corp. and SL Green Operating Partnership, L.P.

Notes to Consolidated Financial Statements (cont.)

December 31, 2018

venture partner, we account for these arrangements as real estate investments under the equity method of accounting for investments. Otherwise, we account for these arrangements consistent with the accounting for our debt and preferred equity investments.

Deferred Lease Costs

Deferred lease costs consist of fees and direct costs incurred to execute operating leases and are amortized on a straight-line basis over the related lease term. Certain of our employees provide leasing services to the wholly-owned properties. For the years ended December 31, 2018, 2017 and 2016, $15.7 million, $16.4 million, and $15.4 million of their compensation, respectively, was capitalized and is amortized over an estimated average lease term of seven years.

Deferred Financing Costs

Deferred financing costs represent commitment fees, legal, title and other third party costs associated with obtaining commitments for financing which result in a closing of such financing. These costs are amortized over the terms of the respective agreements. Unamortized deferred financing costs are expensed when the associated debt is refinanced or repaid before maturity. Costs incurred in seeking financing transactions, which do not close, are expensed in the period in which it is determined that the financing will not close. Deferred financing costs related to a recognized debt liability are presented in the balance sheet as a direct deduction from the carrying amount of that debt liability.

Revenue Recognition

Rental revenue is recognized on a straight-line basis over the term of the lease. Rental revenue recognition commences when the tenant takes possession or controls the physical use of the leased space. In order for the tenant to take possession, the leased space must be substantially ready for its intended use. To determine whether the leased space is substantially ready for its intended use, management evaluates whether we are or the tenant is the owner of tenant improvements for accounting purposes. When management concludes that we are the owner of tenant improvements, rental revenue recognition begins when the tenant takes possession of the finished space, which is when such tenant improvements are substantially complete. In certain instances, when management concludes that we are not the owner (the tenant is the owner) of tenant improvements, rental revenue recognition begins when the tenant takes possession of or controls the space. When management concludes that we are the owner of tenant improvements for accounting purposes, we record amounts funded to construct the tenant improvements as a capital asset. For these tenant improvements, we record amounts reimbursed by tenants as a reduction of the capital asset. When management concludes that the tenant is the owner of tenant improvements for accounting purposes, we record our contribution towards those improvements as a lease incentive, which is included in deferred costs, net on our consolidated balance sheets and amortized as a reduction to rental revenue on a straight-line basis over the term of the lease. The excess of rents recognized over amounts contractually due pursuant to the underlying leases are included in deferred rents receivable on the consolidated balance sheets. We establish, on a current basis, an allowance for future potential tenant credit losses, which may occur against this account. The balance reflected on the consolidated balance sheets is net of such allowance.

In addition to base rent, our tenants also generally will pay their pro rata share of increases in real estate taxes and operating expenses for the building over a base year. In some leases, in lieu of paying additional rent based upon increases in building operating expenses, the tenant will pay additional rent based upon increases in the wage rate paid to porters over the porters' wage rate in effect during a base year or increases in the consumer price index over the index value in effect during a base year. In addition, many of our leases contain fixed percentage increases over the base rent to cover escalations. Electricity is most often supplied by the landlord either on a sub-metered basis, or rent inclusion basis (i.e., a fixed fee is included in the rent for electricity, which amount may increase based upon increases in electricity rates or increases in electrical usage by the tenant). Base building services other than electricity (such as heat, air conditioning and freight elevator service during business hours, and base building cleaning) are typically provided at no additional cost, with the tenant paying additional rent only for services which exceed base building services or for services which are provided outside normal business hours. These escalations are based on actual expenses incurred in the prior calendar year. If the expenses in the current year are different from those in the prior year, then during the current year, the escalations will be adjusted to reflect the actual expenses for the current year.

We record a gain on sale of real estate assets when we no longer hold a controlling financial interest in the entity holding the real estate, a contract exists with a third party and that third party has control of the assets acquired.

Investment income on debt and preferred equity investments is accrued based on the contractual terms of the instruments and when, in the opinion of management, it is deemed collectible. Some debt and preferred equity investments provide for accrual of interest at specified rates, which differ from current payment terms. Interest is recognized on such loans at the accrual rate subject to management's determination that accrued interest is ultimately collectible, based on the underlying collateral and operations of the borrower. If management cannot make this determination, interest income above the current pay rate is recognized only upon actual receipt.

92

SL Green Realty Corp. and SL Green Operating Partnership, L.P.

Notes to Consolidated Financial Statements (cont.)

December 31, 2018

Deferred origination fees, original issue discounts and loan origination costs, if any, are recognized as an adjustment to interest income over the terms of the related investments using the effective interest method. Fees received in connection with loan commitments are also deferred until the loan is funded and are then recognized over the term of the loan as an adjustment to yield. Discounts or premiums associated with the purchase of loans are amortized or accreted into interest income as a yield adjustment on the effective interest method based on expected cash flows through the expected maturity date of the related investment. If we purchase a debt or preferred equity investment at a discount, intend to hold it until maturity and expect to recover the full value of the investment, we accrete the discount into income as an adjustment to yield over the term of the investment. If we purchase a debt or preferred equity investment at a discount with the intention of foreclosing on the collateral, we do not accrete the discount. For debt investments acquired at a discount for credit quality, the difference between contractual cash flows and expected cash flows at acquisition is not accreted. Anticipated exit fees, the collection of which is expected, are also recognized over the term of the loan as an adjustment to yield.

Debt and preferred equity investments are placed on a non-accrual status at the earlier of the date at which payments become 90 days past due or when, in the opinion of management, a full recovery of interest income becomes doubtful. Interest income recognition on any non-accrual debt or preferred equity investment is resumed when such non-accrual debt or preferred equity investment becomes contractually current and performance is demonstrated to be resumed. Interest is recorded as income on impaired loans only to the extent cash is received.

We may syndicate a portion of the loans that we originate or sell the loans individually. When a transaction meets the criteria for sale accounting, we derecognize the loan sold and recognize gain or loss based on the difference between the sales price and the carrying value of the loan sold. Any related unamortized deferred origination fees, original issue discounts, loan origination costs, discounts or premiums at the time of sale are recognized as an adjustment to the gain or loss on sale, which is included in investment income on the consolidated statement of operations. Any fees received at the time of sale or syndication are recognized as part of investment income.

Asset management fees are recognized on a straight-line basis over the term of the asset management agreement.

Allowance for Doubtful Accounts

We maintain an allowance for doubtful accounts for estimated losses resulting from the inability of our tenants to make required payments. If the financial condition of a specific tenant were to deteriorate, resulting in an impairment of its ability to make payments, additional allowances may be required.

Allowance for Loan Loss and Other Investment Reserves

The expense for loan loss and other investment reserves in connection with debt and preferred equity investments is the charge to earnings to adjust the allowance for possible losses to the level that we estimate to be adequate, based on Level 3 data, considering delinquencies, loss experience and collateral quality.

The Company evaluates debt and preferred equity investments that are classified as held to maturity for possible impairment or credit deterioration associated with the performance and/or value of the underlying collateral property as well as the financial and operating capability of the borrower/sponsor. Quarterly, the Company assigns each loan a risk rating. Based on a 3-point scale, loans are rated “1” through “3,” from less risk to greater risk, which ratings are defined as follows: 1 - Low Risk Assets - Low probability of loss, 2 - Watch List Assets - Higher potential for loss, 3 - High Risk Assets - Loss more likely than not.

When it is probable that we will be unable to collect all amounts contractually due, the investment is considered impaired. A valuation allowance is measured based upon the excess of the recorded investment amount over the fair value of the collateral. Any deficiency between the carrying amount of an asset and the calculated value of the collateral is charged to expense. We continue to assess or adjust our estimates based on circumstances of a loan and the underlying collateral. If additional information reflects increased recovery of our investment, we will adjust our reserves accordingly.

Debt and preferred equity investments that are classified as held for sale are carried at the lower of cost or fair market value using available market information obtained through consultation with dealers or other originators of such investments as well as discounted cash flow models based on Level 3 data pursuant to ASC 820-10. As circumstances change, management may conclude not to sell an investment designated as held for sale. In such situations, the investment will be reclassified at its net carrying value to debt and preferred equity investments held to maturity. For these reclassified investments, the difference between the current carrying value and the expected cash to be collected at maturity will be accreted into income over the remaining term of the investment.

93

SL Green Realty Corp. and SL Green Operating Partnership, L.P.

Notes to Consolidated Financial Statements (cont.)

December 31, 2018

Rent Expense

Rent expense is recognized on a straight-line basis over the initial term of the lease. The excess of the rent expense recognized over the amounts contractually due pursuant to the underlying lease is included in the deferred lease payable on the consolidated balance sheets.

Underwriting Commissions and Costs

Underwriting commissions and costs incurred in connection with our stock offerings are reflected as a reduction of additional paid-in-capital.

Exchangeable Debt Instruments

The initial proceeds from exchangeable debt that may be settled in cash, including partial cash settlements, are bifurcated between a liability component and an equity component associated with the embedded conversion option. The objective of the accounting guidance is to require the liability and equity components of exchangeable debt to be separately accounted for in amanner such that the interest expense on the exchangeable debt is not recorded at the stated rate of interest but rather at an effective rate that reflects the issuer's conventional debt borrowing rate at the date of issuance. We calculate the liability component of exchangeable debt based on the present value of the contractual cash flows discounted at our comparable market conventional debt borrowing rate at the date of issuance. The difference between the principal amount and the fair value of the liability component is reported as a discount on the exchangeable debt that is accreted as additional interest expense from the issuance date through the contractual maturity date using the effective interest method. A portion of this additional interest expense may be capitalized to the development and redevelopment balances qualifying for interest capitalization each period. The liability component of the exchangeable debt is reported net of discounts on our consolidated balance sheets. We calculate the equity component of exchangeable debt based on the difference between the initial proceeds received from the issuance of the exchangeable debt and the fair value of the liability component at the issuance date. The equity component is included in additional paid-in-capital, net of issuance costs, on our consolidated balance sheets. We allocate issuance costs for exchangeable debt between the liability and the equity components based on their relative values.

Transaction Costs

In January 2017, we adopted ASU No. 2017-01, Business Combinations: Clarifying the Definition of a Business, which changed how we account for transaction costs. Prior to January 2017, transaction costs were expensed as incurred. Starting in January 2017, transaction costs for asset acquisitions are capitalized to the investment basis which is then subject to a purchase price allocation based on relative fair value and transaction costs for business combinations or costs incurred on potential transactions which are not consummated are expensed as incurred.

Income Taxes

SL Green is taxed as a REIT under Section 856(c) of the Code. As a REIT, SL Green generally is not subject to Federal income tax. To maintain its qualification as a REIT, SL Green must distribute at least 90% of its REIT taxable income to its stockholders and meet certain other requirements. If SL Green fails to qualify as a REIT in any taxable year, SL Green will be subject to Federal income tax on its taxable income at regular corporate rates. SL Green may also be subject to certain state, local and franchise taxes. Under certain circumstances, Federal income and excise taxes may be due on its undistributed taxable income.

The Operating Partnership is a partnership and, as a result, all income and losses of the partnership are allocated to the partners for inclusion in their respective income tax returns. The only provision for income taxes included in the consolidated statements of operations relates to the Operating Partnership’s consolidated taxable REIT subsidiaries. The Operating Partnership may also be subject to certain state, local and franchise taxes.

We have elected, and may elect in the future, to treat certain of our corporate subsidiaries as taxable REIT subsidiaries, or TRSs. In general, TRSs may perform non-customary services for the tenants of the Company, hold assets that we cannot hold directly and generally may engage in any real estate or non-real estate related business. The TRSs generate income, resulting in Federal and state income tax liability for these entities.

During the years ended December 31, 2018, 2017 and 2016, we recorded Federal, state and local tax provisions of $2.8 million, $4.3 million, and $2.8 million, respectively. For the year ended December 31, 2018, the Company paid distributions on its common stock of $3.25 per share which represented $1.46 per share of ordinary income and $1.79 per share of capital gains. For the year ended December 31, 2017, the Company paid distributions on its common stock of $3.10 per share which represented $1.24 per share of ordinary income, and $1.86 per share of capital gains. For the year ended December 31, 2016, the Company

94

SL Green Realty Corp. and SL Green Operating Partnership, L.P.

Notes to Consolidated Financial Statements (cont.)

December 31, 2018

paid distributions on its common stock of $2.88 per share which represented $2.48 per share of ordinary income and $0.40 per share of capital gains.

We follow a two-step approach for evaluating uncertain tax positions. Recognition (step one) occurs when an enterprise concludes that a tax position, based solely on its technical merits, is more-likely-than-not to be sustained upon examination. Measurement (step two) determines the amount of benefit that is more-likely-than-not to be realized upon settlement. Derecognition of a tax position that was previously recognized would occur when a company subsequently determines that a tax position no longer meets the more-likely-than-not threshold of being sustained. The use of a valuation allowance as a substitute for derecognition of tax positions is prohibited.

On December 22, 2017, the Tax Cuts and Jobs Act (the ‘‘Tax Act’’) was signed into law and makes substantial changes to the Code. The Tax Act has not had a material impact on our financial statements for the years ended December 31, 2018 or December 31, 2017.

Stock-Based Employee Compensation Plans

We have a stock-based employee compensation plan, described more fully in Note 14, "Share-based Compensation."

The Company's stock options are recorded at fair value at the time of issuance. Fair value of the stock options is determined using the Black-Scholes option pricing model. The Black-Scholes model was developed for use in estimating the fair value of traded options, which have no vesting restrictions and are fully transferable. In addition, option valuation models require the input of highly subjective assumptions including the expected stock price volatility. Because our plan has characteristics significantly different from those of traded options and because changes in the subjective input assumptions can materially affect the fair value estimate, in our opinion, the existing models do not necessarily provide a reliable single measure of the fair value of the employee stock options.

Compensation cost for stock options, if any, is recognized over the vesting period of the award. Our policy is to grant options with an exercise price equal to the quoted closing market price of the Company's common stock on either the grant date or the date immediately preceding the grant date. Awards of stock or restricted stock are expensed as compensation over the benefit period based on the fair value of the stock on the grant date.

For share-based awards with a performance or market measure, we recognize compensation cost over the requisite service period, using the accelerated attribution expense method. The requisite service period begins on the date the compensation committee of our board of directors authorizes the award, adopts any relevant performance measures and communicates the award to the employees. For programs with awards that vest based on the achievement of a performance condition or market condition, we determine whether it is probable that the performance condition will be met, and estimate compensation cost based on the fair value of the award at the applicable award date estimated using a binomial model or market quotes. For share-based awards for which there is no pre-established performance measure, we recognize compensation cost over the service vesting period, which represents the requisite service period, on a straight-line basis. In accordance with the provisions of our share-based incentive compensation plans, we accept the return of shares of the Company's common stock, at the current quoted market price, from certain key employees to satisfy minimum statutory tax-withholding requirements related to shares that vested during the period.

Awards can also be made in the form of a separate series of units of limited partnership interest in the Operating Partnership called long-term incentive plan units, or LTIP units. LTIP units, which can be granted either as free-standing awards or in tandem with other awards under our stock incentive plan, are valued by reference to the value of the Company's common stock at the time of grant, and are subject to such conditions and restrictions as the compensation committee of the Company's board of directors may determine, including continued employment or service, computation of financial metrics and/or achievement of pre-established performance goals and objectives.

Derivative Instruments

In the normal course of business, we use a variety of commonly used derivative instruments, such as interest rate swaps, caps, collars and floors, to manage, or hedge, interest rate risk. Effectiveness is essential for those derivatives that we intend to qualify for hedge accounting. Some derivative instruments are associated with an anticipated transaction. In those cases, hedge effectiveness criteria also require that it be probable that the underlying transaction occurs. Instruments that meet these hedging criteria are formally designated as hedges at the inception of the derivative contract.

To determine the fair values of derivative instruments, we use a variety of methods and assumptions that are based on market conditions and risks existing at each balance sheet date. For the majority of financial instruments including most derivatives, long-term investments and long-term debt, standard market conventions and techniques such as discounted cash flow analysis, option

95

SL Green Realty Corp. and SL Green Operating Partnership, L.P.

Notes to Consolidated Financial Statements (cont.)

December 31, 2018

pricing models, replacement cost, and termination cost are used to determine fair value. All methods of assessing fair value result in a general approximation of value, and such value may never actually be realized.

In the normal course of business, we are exposed to the effect of interest rate changes and limit these risks by following established risk management policies and procedures including the use of derivatives. To address exposure to interest rates, derivatives are used primarily to fix the rate on debt based on floating-rate indices and manage the cost of borrowing obligations.

We use a variety of conventional derivative products. These derivatives typically include interest rate swaps, caps, collars and floors. We expressly prohibit the use of unconventional derivative instruments and using derivative instruments for trading or speculative purposes. Further, we have a policy of only entering into contracts with major financial institutions based upon their credit ratings and other factors.

We may employ swaps, forwards or purchased options to hedge qualifying forecasted transactions. Gains and losses related to these transactions are deferred and recognized in net income as interest expense in the same period or periods that the underlying transaction occurs, expires or is otherwise terminated.

Hedges that are reported at fair value and presented on the balance sheet could be characterized as cash flow hedges or fair value hedges. Interest rate caps and collars are examples of cash flow hedges. Cash flow hedges address the risk associated with future cash flows of interest payments. For all hedges held by us and which were deemed to be fully effective in meeting the hedging objectives established by our corporate policy governing interest rate risk management, no net gains or losses were reported in earnings. The changes in fair value of hedge instruments are reflected in accumulated other comprehensive income. For derivative instruments not designated as hedging instruments, the gain or loss, resulting from the change in the estimated fair value of the derivative instruments, is recognized in current earnings during the period of change.

Earnings per Share of the Company

The Company presents both basic and diluted earnings per share, or EPS, using the two-class method, which is an earnings allocation formula that determines EPS for common stock and any participating securities according to dividends declared (whether paid or unpaid). Under the two-class method, basic EPS is computed by dividing the income available to common stockholders by the weighted-average number of common stock shares outstanding for the period. Basic EPS includes participating securities, consisting of unvested restricted stock that receive nonforfeitable dividends similar to shares of common stock. Diluted EPS reflects the potential dilution that could occur if securities or other contracts to issue common stock were exercised or converted into common stock, where such exercise or conversion would result in a lower EPS amount. Diluted EPS also includes units of limited partnership interest. The dilutive effect of stock options is reflected in the weighted average diluted outstanding shares calculation by application of the treasury stock method. There was no dilutive effect for the exchangeable senior notes as the conversion premium was to be paid in cash.

Earnings per Unit of the Operating Partnership

The Operating Partnership presents both basic and diluted earnings per unit, or EPU, using the two-class method, which is an earnings allocation formula that determines EPU for common units and any participating securities according to dividends declared (whether paid or unpaid). Under the two-class method, basic EPU is computed by dividing the income available to common unitholders by the weighted-average number of common units outstanding for the period. Basic EPU includes participating securities, consisting of unvested restricted units that receive nonforfeitable dividends similar to shares of common units. Diluted EPU reflects the potential dilution that could occur if securities or other contracts to issue common units were exercised or converted into common units, where such exercise or conversion would result in a lower EPU amount. The dilutive effect of unit options is reflected in the weighted average diluted outstanding units calculation by application of the treasury stock method. There was no dilutive effect for the exchangeable senior notes as the conversion premium was to be paid in cash.

Use of Estimates

The preparation of financial statements in conformity with accounting principles generally accepted in the United States requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Actual results could differ from those estimates.

Concentrations of Credit Risk

Financial instruments that potentially subject us to concentrations of credit risk consist primarily of cash investments, debt and preferred equity investments and accounts receivable. We place our cash investments with high quality financial institutions. The collateral securing our debt and preferred equity investments is located in the New York metropolitan area. See Note 5, "Debt and Preferred Equity Investments."

96

SL Green Realty Corp. and SL Green Operating Partnership, L.P.

Notes to Consolidated Financial Statements (cont.)

December 31, 2018

We perform ongoing credit evaluations of our tenants and require most tenants to provide security deposits or letters of credit. Though these security deposits and letters of credit are insufficient to meet the total value of a tenant's lease obligation, they are a measure of good faith and a source of funds to offset the economic costs associated with lost revenue and the costs associated with re-tenanting a space. The properties in our real estate portfolio are located in the New York metropolitan area. The tenants located in our buildings operate in various industries. Other than one tenant, Credit Suisse Securities (USA), Inc., who accounts for 8.2% of our share of annualized cash rent, no other tenant in our portfolio accounted for more than 5.0% of our share of annualized cash rent, including our share of joint venture annualized cash rent, at December 31, 2018.

For the years ended December 31, 2018, 2017, and 2016, the following properties contributed more than 5.0% of our annualized cash rent, including our share of joint venture annualized cash rent:

Property	2018	Property	2017	Property	2016
11 Madison Avenue	7.4%	11 Madison Avenue	7.1%	1515 Broadway	8.8%
1185 Avenue of the Americas	6.7%	1185 Avenue of the Americas	7.1%	1185 Avenue of the Americas	6.9%
420 Lexington Avenue	6.5%	1515 Broadway	7.0%	11 Madison Avenue	6.1%
1515 Broadway	6.0%	420 Lexington Avenue	6.0%	420 Lexington Avenue	5.9%
One Madison Avenue	5.8%	One Madison Avenue	5.6%	One Madison Avenue	5.6%

As of December 31, 2018, 68.7% of our work force is covered by six collective bargaining agreements and 56.0% of our work force, which services substantially all of our properties, is covered by collective bargaining agreements that expire in December 2019. See Note 19, "Benefits Plans."

Reclassification

Certain prior year balances have been reclassified to conform to our current year presentation.

Accounting Standards Updates

In October 2018, the FASB issued Accounting Standard Update (ASU) No. 2018-17, Consolidation (Topic 810), Targeted Improvements to Related Party Guidance for Variable Interest Entities. Under this amendment reporting entities, when determining if the decision-making fees are variable interests, are to consider indirect interests held through related parties under common control on a proportional basis rather than as a direct interest in its entirety. The guidance is effective for the Company for fiscal years beginning after December 15, 2019. Early adoption is permitted. The Company has adopted this guidance and it had no impact on the Company’s consolidated financial statements.

In August 2018, The Securities and Exchange Commission adopted a final rule that eliminated or amended disclosure requirements that were redundant or outdated in light of changes in its requirements, generally accepted accounting principles, or changes in the business environment. The commission also referred certain disclosure requirements to the Financial Accounting Standards Board for potential incorporation into generally accepted accounting principles. The rule is effective for filings after November 5, 2018. The Company assessed the impact of this rule and determined that the changes resulted in clarification or expansion of existing requirements. The Company early adopted the rule upon publication to the federal register on October 5, 2018 and it did not have a material impact on the Company’s consolidated financial statements.

In August 2018, the FASB issued Accounting Standard Update (ASU) No. 2018-15, Intangibles - Goodwill and Other- Internal-Use Software (Topic 350-40), Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That is a Service Contract. The amendments provide guidance on accounting for fees paid when the arrangement includes a software license and align the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing costs to develop or obtain internal-use software. The guidance is effective for the Company for fiscal years beginning after December 15, 2019. Early adoption is permitted. The Company has not yet adopted this new guidance and does not expect it to have a material impact on the Company’s consolidated financial statements when the new standard is implemented.

In August 2018, the FASB issued ASU No. 2018-13, Fair Value Measurement (Topic 820), Disclosure Framework - Changes to the Disclosure Requirements for Fair Value Measurement. This amendment removed, modified and added the disclosure requirements under Topic 820. The changes are effective for the Company for fiscal years beginning after December 15, 2019. Early adoption is permitted for the removed or modified disclosures with adoption of the additional disclosures upon the effective date. The Company has not yet adopted this new guidance and does not expect it to have a material impact on the Company’s consolidated financial statements when the new standard is implemented.

97

SL Green Realty Corp. and SL Green Operating Partnership, L.P.

Notes to Consolidated Financial Statements (cont.)

December 31, 2018

In June 2018, the FASB issued ASU No. 2018-07, Compensation - Stock Compensation (Topic 718), Improvements to Nonemployee Share-Based Payment Accounting. This amendment provides additional guidance related to share-based payment transactions for acquiring goods or services from nonemployees. The guidance is effective for the Company for fiscal years beginning after December 15, 2018, including the interim periods within that fiscal year. The Company will adopt this guidance January 1, 2019 and does not expect it to have a material impact on the Company’s consolidated financial statements.

In February 2018, the FASB issued ASU No. 2018-03, Technical Corrections and Improvements to Financial Instruments- Overall (Subtopic 825-10), Recognition and Measurement of Financial Assets and Financial Liabilities. These amendments provide additional guidance related to equity securities without a readily determinable fair value, forward contracts and options purchased on those equity securities and fair value option liabilities. The Company adopted the guidance on July 1, 2018, and it did not have a material impact on the Company’s consolidated financial statements.

In August 2017, the FASB issued ASU No. 2017-12, Derivatives and Hedging (Topic 815), Targeted Improvements to Accounting for Hedging Activities, and in July 2018, the FASB issued ASU No. 2018-16, Derivatives and Hedging (Topic 815): Inclusion of the Secured Overnight Financing Rate (SOFR) Overnight Index Swap (OIS) Rate as a Benchmark Interest Rate for Hedge Accounting Purposes. The amendments in the new standards will permit more flexibility in hedging interest rate risk for both variable rate and fixed rate financial instruments. The standards will also enhance the presentation of hedge results in the financial statements. The guidance is effective for fiscal years beginning after December 15, 2018. Early adoption is permitted. The Company will adopt this guidance January 1, 2019, and does not expect a material impact on the Company’s consolidated financial statements when the new standards are implemented.

In May 2017, the FASB issued ASU No. 2017-09, Compensation - Stock Compensation (Topic 718), Scope of Modification Accounting. The guidance clarifies the changes to the terms or conditions of a share-based payment award that require an entity to apply modification accounting in Topic 718. The Company adopted the guidance on January 1, 2018 and it had no impact on the Company's consolidated financial statements.

In November 2016, the FASB issued ASU No. 2016-18, Statement of Cash Flows (Topic 230): Restricted Cash. The guidance requires that the statement of cash flows explain the change during the period in the total of cash, cash equivalents, and amounts generally described as restricted cash. As a result, entities will no longer present transfers between these items on the statement of cash flows. The Company adopted the guidance on January 1, 2018 and has included the changes in restricted cash when reconciling the beginning-of-period and end-of-period total amounts on the statement of cash flows.

In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments and in November 2018 issued ASU No. 2018-19, Codification Improvements to Topic 326, Financial Instruments - Credit Losses. . The guidance changes how entities will measure credit losses for most financial assets and certain other instruments that are not measured at fair value through net income. The guidance replaces the current ‘incurred loss’ model with an ‘expected loss’ approach. The guidance is effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. Early adoption is permitted after December 15, 2018. The Company’s DPE portfolio and capital lease assets will be subject to this guidance once the Company adopts it. ASU No. 2018-19 excludes operating lease receivables from the scope of this guidance. The Company continues to evaluate the impact of adopting this new accounting standard on the Company’s consolidated financial statements.

In February 2016, the FASB issued ASU No. 2016-02, Leases. In July 2018, the FASB issued ASU No. 2018-10 - Codification Improvements to Topic 842, Leases and ASU No. 2018-11 - Targeted Improvements. In December 2018, the FASB issued ASU No. 2018-20 - Narrow-Scope Improvements for Lessors. This guidance requires lessees to recognize lease assets and lease liabilities for those leases classified as operating leases under the previous standard. Depending on the lease classification, lessees will recognize expense based on the effective interest method for finance leases or on a straight-line basis for operating leases. The Company will apply this guidance to the ground leases under which the Company is lessee. The Company is required to record a liability for the obligation to make payments under the lease and an asset for the right to use the underlying asset during the lease term and will also apply the new expense recognition requirements given the lease classification. While the Company is continuing to assess all potential impacts of the standard, we expect total liabilities and total assets to increase by $0.4 to $0.5 billion as of the date of adoption. The accounting applied by a lessor is largely unchanged from that applied under the previous standard. The Company does expect to adopt the practical expedient offered in ASU No. 2018-11 that allows lessors to not separate non-lease components from the related lease components under certain conditions, which the Company expects most of its leases to qualify for. Additionally, for future leases, the Company will no longer capitalize internal leasing costs as these costs are not considered to be incremental under the new guidance. The Company is assessing all potential impacts of the standard and currently estimates a decrease in net income of approximately $10.0 million related to this change based on its initial assessment. This guidance in this standard is effective for fiscal years beginning after December 15, 2018 and interim periods within those fiscal years. Early

98

SL Green Realty Corp. and SL Green Operating Partnership, L.P.

Notes to Consolidated Financial Statements (cont.)

December 31, 2018

adoption is permitted. The Company will adopt this guidance January 1, 2019 and will apply the modified retrospective approach. The Company will elect the package of practical expedients that allows an entity to not reassess (i) whether any expired or existing contracts are or contain leases, (ii) lease classification for any expired or existing leases and (iii) initial direct costs for any expired or existing leases.

In January 2016, the FASB issued ASU 2016-01 (Subtopic 825-10), Recognition and Measurement of Financial Assets and Financial Liabilities. The guidance requires entities to measure equity investments that do not result in consolidation and are not accounted for under the equity method at fair value through earnings, to record changes in instrument-specific credit risk for financial liabilities measured under the fair value option in other comprehensive income, use the exit price notion when measuring an instrument’s fair value for disclosure and to separately present financial assets and liabilities by measurement category and form of instrument on the balance sheet or in the notes to the financial statements. The Company adopted the guidance effective January 1, 2018, and it had no impact on the Company’s consolidated financial statements.

In May 2014, the FASB issued a new comprehensive revenue recognition guidance which requires us to recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which we expect to be entitled in exchange for those goods and services (ASU 2014-09). The FASB also issued implementation guidance in March 2016, April 2016 and May 2016 - ASU’s 2016-08, 2016-10 and 2016-12, respectively. The Company adopted this guidance on January 1, 2018. Since the Company’s revenue is related to leasing activities, the adoption of this guidance did not have a material impact on the consolidated financial statements. The new guidance is applicable to service contracts with joint ventures for which the Company earns property management fees, leasing commissions and development and construction fees. The adoption of this new guidance did not change the accounting for these fees as the pattern of recognition of revenue does not change with the new guidance. We will continue to recognize revenue over time on these contracts because the customer simultaneously receives and consumes the benefits provided by our performance.

In February 2017, the FASB issued ASU No. 2017-05 to clarify the scope of asset derecognition guidance in Subtopic 610-20, which also provided guidance on accounting for partial sales of nonfinancial assets.  Subtopic 610-20 was issued in May 2014 as part of ASU 2014-09.  The Company adopted this guidance on January 1, 2018, and applied the modified retrospective approach. The Company elected to adopt the practical expedient under ASC 606, Revenue from Contracts with Customers, which allows an entity to apply the guidance only to contracts with non-customers that are open based on ASU 360-20, Real Estate Sales, (i.e. failed sales) as of the adoption date.   The Company had one open contract in 2017 with a non-customer that was evaluated under ASC 610-20.  The Company entered into an agreement to sell a portion of their interest in an entity that held a controlling interest in the property at 1515 Broadway.  Upon execution of the agreement in 2017, the transaction was evaluated under ASC 360-20, Real Estate Sales, and did not meet the criteria for sale accounting.  Upon adoption of ASC 606, this contract met the criteria for sale accounting under ASC 610-20. Through the sale, the Company no longer retains a controlling interest, as defined in ASC 810, Consolidation, and the impact of this adjustment is a gain of $0.6 billion from the sale of the partial interest and related step-up in basis to fair value of the non-controlling interest retained. This was recorded in the first quarter of 2018 as an adjustment to beginning retained earnings.

3. Property Acquisitions

2018 Acquisitions

During the year ended December 31, 2018, the properties listed below were acquired from third parties.

Property	Acquisition Date	Property Type	Approximate Square Feet		Acquisition Price (in millions)
2 Herald Square(1)	May 2018	Leasehold Interest	369,000		$	266.0
1231 Third Avenue(2)(3)	July 2018	Fee Interest	39,000		55.4
Upper East Side Residential(3)(4)	August 2018	Fee Interest	0.2	acres	30.2
133 Greene Street(2)	October 2018	Fee Interest	6,425		31.0
712 Madison Avenue(2)	December 2018	Fee Interest	6,600		58.0

(1) In May 2018, the Company was the successful bidder for the leasehold interest in 2 Herald Square, at the foreclosure of the asset. In April and May 2017, the Company had purchased, at par, loans in maturity default that were secured by the leasehold interest in 2 Herald Square. At the time the loans were purchased, the Company expected to collect all contractually required payments, including interest. In August 2017, the Company determined that it was probable that the loans would not be repaid in full and therefore, the loans were put on non-accrual status. No impairment was recorded as the Company believed that the fair value of the leasehold exceeded the carrying amount of the loans. In May 2018, the Company was the successful bidder at the foreclosure of the asset. We recorded the assets acquired and liabilities assumed at fair value. This resulted in the recognition of a fair value adjustment of $8.1 million,

99

SL Green Realty Corp. and SL Green Operating Partnership, L.P.

Notes to Consolidated Financial Statements (cont.)

December 31, 2018

which is reflected in the Company's consolidated statement of operations within purchase price and other fair value adjustments. See Note 16, "Fair Value Measurements." The Company subsequently sold a 49% interest in the property in November 2018. See Note 4, "Properties Held for Sale and Dispositions." and Note 6, "Investments in Unconsolidated Joint Ventures."

(2) The Company accepted an assignment of the equity interests in the property in lieu of repayment of the Company's debt investment, and recorded the assets received and liabilities assumed at fair value.

(3) This property was subsequently sold in October 2018. See Note 4, "Properties Held for Sale and Dispositions."

(4) In August 2018, the Company acquired the fee interest in three additional land parcels at the Upper East Side Residential Assemblage.

2017 Acquisitions

During the year ended December 31, 2017, we did not acquire any properties from a third party.

2016 Acquisitions

During the year ended December 31, 2016, the property listed below was acquired from a third party. The following summarizes our final allocation of the purchase price of the assets acquired and liabilities assumed upon the closing of this acquisition (in thousands):

	183 Broadway
Acquisition Date	March 2016
Ownership Type	Fee Interest
Property Type	Retail/Residential
Purchase Price Allocation:
Land	$	5,799
Building and building leasehold	23,431
Above-market lease value	—
Acquired in-place leases	773
Other assets, net of other liabilities	20
Assets acquired	30,023
Mark-to-market assumed debt	—
Below-market lease value	(1,523		)
Derivatives	—
Liabilities assumed	(1,523		)
Purchase price	$	28,500
Net consideration funded by us at closing, excluding consideration financed by debt	$	28,500
Equity and/or debt investment held	$	—
Debt assumed	$	—

100

SL Green Realty Corp. and SL Green Operating Partnership, L.P.

Notes to Consolidated Financial Statements (cont.)

December 31, 2018

4. Properties Held for Sale and Property Dispositions

Properties Held for Sale

As of December 31, 2018, no properties were classified as held for sale.

Property Dispositions

The following table summarizes the properties sold during the years ended December 31, 2018, 2017, and 2016:

Property	Disposition Date	Property Type	Unaudited Approximate Usable Square Feet	Sales Price(1) (in millions)		Gain (Loss) on Sale(2) (in millions)
2 Herald Square(3)	November 2018	Office/Retail	369,000	$	265.0	$	—
400 Summit Lake Drive	November 2018	Land	39.5 acres	3.0		(36.2		)
Upper East Side Assemblage(4)(5)	October 2018	Development	70,142	143.8		(6.3		)
1-6 International Drive	July 2018	Office	540,000	55.0		(2.6		)
635 Madison Avenue	June 2018	Retail	176,530	153.0		(14.1		)
115-117 Stevens Avenue	May 2018	Office	178,000	12.0		(0.7		)
600 Lexington Avenue	January 2018	Office	303,515	305.0		23.8
1515 Broadway (6)	December 2017	Office	1,750,000	1,950.0		—
125 Chubb Way	October 2017	Office	278,000	29.5		(26.1		)
16 Court Street	October 2017	Office	317,600	171.0		64.9
680-750 Washington Boulevard	July 2017	Office	325,000	97.0		(44.2		)
520 White Plains Road	April 2017	Office	180,000	21.0		(14.6		)
102 Greene Street (7)	April 2017	Retail	9,200	43.5		4.9
400 East 57th Street	October 2016	Residential	290,482	83.3		23.9
11 Madison Avenue (8)	August 2016	Office	2,314,000	2,605.0		3.6
500 West Putnam	July 2016	Office	121,500	41.0		(10.4		)
388 Greenwich	June 2016	Office	2,635,000	2,002.3		206.5
7 International Drive	May 2016	Land	31 Acres	20.0		(6.9		)
248-252 Bedford Avenue	February 2016	Residential	66,611	55.0		15.3
885 Third Avenue (9)	February 2016	Leased Fee Interest	607,000	453.0		(8.8		)

(1) Sales price represents the actual sales price for an entire property or the gross asset valuation for interests in a property.

(2) The gain on sale for 600 Lexington, 16 Court Street, 102 Greene Street, 400 East 57th Street, 11 Madison Avenue, 388 Greenwich, and 248-252 Bedford Avenue are net of $1.3 million, $2.5 million, $0.9 million, $1.0 million, $0.6 million, $1.6 million, and $1.3 million in employee compensation accrued in connection with the realization of these investment gains. Additionally, amounts do not include adjustments for expenses recorded in subsequent periods.

(3) In November 2018, the company sold a 49% interest in 2 Herald Square to an Israeli institutional investor. See Note 6, "Investments in Unconsolidated Joint Ventures."

(4) Upper East Side Assemblage consists of 260 East 72nd Street, 31,076 square feet of development rights, 252-254 East 72nd Street, 257 East 71st Street, 259 East 71st Street, and 1231 Third Avenue.

(5) The Company recorded a $5.8 million charge in 2018 that is included in depreciable real estate reserves and impairment in the consolidated statement of operations.

(6) In November 2017, the Company sold a 30.13% interest in 1515 Broadway to affiliates of Allianz Real Estate. At that time, the sale did not meet the criteria for sale accounting and as a result the property was accounted for under the profit sharing method. The Company achieved sale accounting upon adoption of ASC 610-20 in January 2018 and closed on the sale of an additional 12.87% interest in the property to Allianz in February 2018. See Note 6, "Investments in Unconsolidated Joint Ventures."

(7) In April 2017, we closed on the sale of a 90% interest 102 Greene Street and had subsequently accounted for our interest in the property as an investment in unconsolidated joint ventures. We sold the remaining 10% interest in September 2017. See Note 6, "Investments in Unconsolidated Joint Ventures."

(8) In August 2016, we sold a 40% interest in 11 Madison Avenue. At that time, the sale did not meet the criteria for sale accounting and, as a result, the property was accounted for under the profit sharing method. In November 2016, the Company obtained consent to the modifications to the mortgage on the property, which resulted in the Company achieving sale accounting on the transaction. See Note 6, "Investments in Unconsolidated Joint Ventures."

(9) In February 2016, we closed on the sale of 885 Third Avenue. At that time, the sale did not meet the criteria for sale accounting and as a result the property remained on our consolidated financial statements until the criteria was met in April 2017.

101

SL Green Realty Corp. and SL Green Operating Partnership, L.P.

Notes to Consolidated Financial Statements (cont.)

December 31, 2018

5. Debt and Preferred Equity Investments

Below is a summary of the activity relating to our debt and preferred equity investments as of December 31, 2018 and 2017 (in thousands):

	December 31, 2018			December 31, 2017
Balance at beginning of period (1)	$	2,114,041		$	1,640,412
Debt investment originations/accretion (2)	834,304			1,142,591
Preferred equity investment originations/accretion (2)	151,704			144,456
Redemptions/sales/syndications/amortization (3)	(994,906		)	(813,418		)
Net change in loan loss reserves	(5,750		)	—
Balance at end of period (1)	$	2,099,393		$	2,114,041

(1) Net of unamortized fees, discounts, and premiums.

(2) Accretion includes amortization of fees and discounts and paid-in-kind investment income.

(3) Certain participations in debt investments that were sold or syndicated did not meet the conditions for sale accounting and are included in other assets and other liabilities on the consolidated balance sheets.

The following table is a rollforward of our total loan loss reserves at December 31, 2018, 2017 and 2016 (in thousands):

	December 31,
	2018			2017		2016
Balance at beginning of year	$	—		$	—	$	—
Expensed	6,839			—		—
Recoveries	—			—		—
Charge-offs and reclassifications	(1,089		)	—		—
Balance at end of period	$	5,750		$	—	$	—

At December 31, 2018, all debt and preferred equity investments were performing in accordance with the terms of the relevant investments. At December 31, 2018 the Company's loan loss reserves of $5.8 million were attributable to two investments with an unpaid principal balance of $159.9 million that are being marketed for sale, are performing in accordance with their respective terms, and were not put on nonaccrual.

At December 31, 2017, all debt and preferred equity investments were performing in accordance with the terms of the relevant investments, with the exception of our investment in 2 Herald Square which was purchased in maturity default in May 2017 and April 2017, respectively, for which we subsequently were the successful bidder for the leasehold interest at the foreclosure of the asset as discussed in Note 3, "Property Acquisitions," and a junior mortgage participation acquired in September 2014, which was acquired for zero, had a carrying value of zero and was canceled in 2018.

We have determined that we have one portfolio segment of financing receivables at December 31, 2018 and 2017 comprising commercial real estate which is primarily recorded in debt and preferred equity investments. Included in other assets is an additional amount of financing receivables totaling $88.8 million and $65.5 million at December 31, 2018 and 2017, respectively. No financing receivables were 90 days past due at December 31, 2018 with the exception of a $28.4 million financing receivable which was put on nonaccrual in August as a result of interest default. The loan was evaluated in accordance with our loan review procedures and the Company concluded that the fair value of the collateral exceeded the carrying amount of the loan.

As of December 31, 2018, Management estimated the weighted average risk rating for our debt and preferred equity investments to be 1.2.

Debt Investments

As of December 31, 2018 and 2017, we held the following debt investments with an aggregate weighted average current yield of 8.99%, at December 31, 2018 (in thousands):

102

SL Green Realty Corp. and SL Green Operating Partnership, L.P.

Notes to Consolidated Financial Statements (cont.)

December 31, 2018

Loan Type	December 31, 2018 Future Funding Obligations		December 31, 2018 Senior Financing		December 31, 2018 Carrying Value (1)		December 31, 2017 Carrying Value (1)		Maturity Date (2)
Fixed Rate Investments:
Mezzanine Loan(3a)	$	—	$	1,160,000	$	213,185	$	204,005	March 2020
Mezzanine Loan	—		15,000		3,500		3,500		September 2021
Mezzanine Loan	—		147,000		24,932		24,913		April 2022
Mezzanine Loan	—		280,000		36,585		34,600		August 2022
Mezzanine Loan	—		85,097		12,706		12,699		November 2023
Mezzanine Loan	—		180,000		30,000		—		December 2023
Mezzanine Loan(3b)	—		115,000		12,941		12,932		June 2024
Mezzanine Loan	—		95,000		30,000		30,000		January 2025
Mezzanine Loan	—		340,000		11,000		15,000		November 2026
Mezzanine Loan	—		1,712,750		55,250		55,250		June 2027
Mortgage/Jr. Mortgage Loan(4)	—		—		—		250,464
Mortgage Loan(5)	—		—		—		26,366
Mortgage Loan(5)	—		—		—		239
Total fixed rate	$	—	$	4,129,847	$	430,099	$	669,968
Floating Rate Investments:
Mezzanine Loan(6)	$	—	$	45,025	$	37,499	$	34,879	January 2019
Mezzanine Loan(3c)(7)	—		85,000		15,333		15,381		March 2019
Mezzanine Loan(3d)(7)	—		65,000		14,822		14,869		March 2019
Mezzanine Loan(8)	—		38,000		21,990		21,939		March 2019
Mezzanine Loan(7)	—		40,000		19,986		19,982		April 2019
Mezzanine Loan	—		265,000		24,961		24,830		April 2019
Mortgage/Jr. Mortgage Participation Loan	40,530		233,086		84,012		71,832		August 2019
Mezzanine Loan(7)(8)	—		65,000		14,998		14,955		August 2019
Mortgage/Mezzanine Loan(7)	—		—		19,999		19,940		August 2019
Mortgage/Mezzanine Loan	1,027		—		154,070		143,919		September 2019
Mezzanine Loan	—		350,000		34,886		34,737		October 2019
Mortgage/Mezzanine Loan(9)	7,243		—		62,493		43,845		January 2020
Mezzanine Loan(9)	559		575,955		79,164		75,834		January 2020
Mortgage Loan	11,204		—		88,501		—		February 2020
Mezzanine Loan	1,277		322,300		53,402		—		March 2020
Mortgage/Mezzanine Loan	14,860		—		277,694		—		April 2020
Mortgage/Mezzanine Loan(7)	—		—		37,094		—		June 2020
Mezzanine Loan	7,887		38,167		12,627		11,259		July 2020
Mortgage/Mezzanine Loan	—		—		83,449		—		October 2020
Mezzanine Loan	38,575		362,908		88,817		75,428		November 2020
Mortgage/Mezzanine Loan	33,131		—		98,804		88,989		December 2020
Mortgage/Mezzanine Loan	—		—		35,266		35,152		December 2020
Jr. Mortgage Participation/Mezzanine Loan	—		60,000		15,665		15,635		July 2021
Mezzanine Loan(8)	—		38,596		7,305		34,947		December 2021
Mortgage/Mezzanine Loan (5)	—		—		—		162,553
Mortgage/Mezzanine Loan (5)	—		—		—		74,755
Mortgage/Mezzanine Loan (10)	—		—		—		23,609

103

SL Green Realty Corp. and SL Green Operating Partnership, L.P.

Notes to Consolidated Financial Statements (cont.)

December 31, 2018

Loan Type	December 31, 2018 Future Funding Obligations		December 31, 2018 Senior Financing		December 31, 2018 Carrying Value (1)		December 31, 2017 Carrying Value (1)		Maturity Date (2)
Mortgage/Mezzanine Loan(5)	—		—		—		16,969
Mezzanine Loan(5)	—		—		—		59,723
Mezzanine Loan(5)	—		—		—		37,851
Mezzanine Loan(5)	—		—		—		14,855
Mezzanine Loan(11)	—		—		—		12,174
Mezzanine Loan(11)	—		—		—		10,934
Mezzanine Loan(5)	—		—		—		37,250
Mezzanine Loan(5)	—		—		—		15,148
Mezzanine Loan(5)	—		—		—		8,550
Mezzanine Loan(11)	—		—		—		26,927
Total floating rate	$	156,293	$	2,584,037	$	1,382,837	$	1,299,650
Total	$	156,293	$	6,713,884	$	1,812,936	$	1,969,618

(1) Carrying value is net of discounts, premiums, original issue discounts and deferred origination fees.

(2) Represents contractual maturity, excluding any unexercised extension options.

(3) Carrying value is net of the following amounts that were sold or syndicated, which are included in other assets and other liabilities on the consolidated balance sheets as a result of the transfers not meeting the conditions for sale accounting: (a) $1.3 million, (b) $12.0 million, (c) $14.6 million, and (d) $14.1 million.

(4) These loans were purchased at par in April and May 2017 and were in maturity default at the time of acquisition. At the time the loans were purchased, the Company expected to collect all contractually required payments, including interest. In August 2017, the Company determined that it was probable that the loans would not be repaid in full and therefore, the loans were put on non-accrual status. No impairment was recorded as the Company believed that the fair value of the property exceeded the carrying amount of the loans. In May 2018, the Company was the successful bidder at the foreclosure of the asset, at which time the loans were credited to our equity investment in the property.

(5) This loan was repaid in 2018.

(6) As of January 2019, this loan is in maturity default. No impairment was recorded as the Company believes that the fair value of the property exceeded the carrying amount of the loans.

(7) This loan was extended in 2018.

(8) This loan was repaid in 2019.

(9) This loan was modified in 2019.

(10) This loan was sold in 2018.

(11) In 2018, the Company accepted an assignment of the equity interests in the property in lieu of repayment of the loan, and recorded the assets received and liabilities assumed at fair value.

Preferred Equity Investments

As of December 31, 2018 and 2017, we held the following preferred equity investments with an aggregate weighted average current yield of 9.12% at December 31, 2018 (in thousands):

Type	December 31, 2018 Future Funding Obligations		December 31, 2018 Senior Financing		December 31, 2018 Carrying Value (1)		December 31, 2017 Carrying Value (1)		Mandatory Redemption (2)
Preferred Equity(3)	$	—	$	272,000	$	143,183	$	144,423	April 2021
Preferred Equity	—		1,768,000		143,274		—		June 2022
	$	—	$	2,040,000	$	286,457	$	144,423

(1) Carrying value is net of deferred origination fees.

(2) Represents contractual maturity, excluding any unexercised extension options.

(3) In February 2016, we closed on the sale of 885 Third Avenue and retained a preferred equity position in the property. The sale did not meet the criteria for sale accounting under the full accrual method in ASC 360-20, Property, Plant and Equipment - Real Estate Sales. As a result the property remained on our consolidated balance sheet until the criteria was met in April 2017 at which time the property was deconsolidated and the preferred equity investment was recognized.

104

SL Green Realty Corp. and SL Green Operating Partnership, L.P.

Notes to Consolidated Financial Statements (cont.)

December 31, 2018

6. Investments in Unconsolidated Joint Ventures

We have investments in several real estate joint ventures with various partners. As of December 31, 2018, the book value of these investments was $3.0 billion, net of investments with negative book values totaling $85.8 million for which we have an implicit commitment to fund future capital needs.

As of December 31, 2018 and December 31, 2017, 800 Third Avenue, 21 East 66th Street, 605 West 42nd Street, 333 East 22nd Street, One Vanderbilt and certain properties within the Stonehenge Portfolio are VIEs in which we are not the primary beneficiary. Our net equity investment in these VIEs was $808.3 million as of December 31, 2018 and $606.2 million as of December 31, 2017. Our maximum loss is limited to the amount of our equity investment in these VIEs. See the "Principles of Consolidation" section of Note 2, "Significant Accounting Policies". All other investments below are voting interest entities. As we do not control the joint ventures listed below, we account for them under the equity method of accounting.

The table below provides general information on each of our joint ventures as of December 31, 2018:

Property	Partner	Ownership Interest (1)	Economic Interest (1)	Unaudited Approximate Square Feet	Acquisition Date (2)	Acquisition Price(2) (in thousands)
100 Park Avenue	Prudential Real Estate Investors	49.90%	49.90%	834,000	February 2000	$	95,800
717 Fifth Avenue	Jeff Sutton/Private Investor	10.92%	10.92%	119,500	September 2006	251,900
800 Third Avenue	Private Investors	60.52%	60.52%	526,000	December 2006	285,000
919 Third Avenue(3)	New York State Teacher's Retirement System	51.00%	51.00%	1,454,000	January 2007	1,256,727
11 West 34th Street	Private Investor/ Jeff Sutton	30.00%	30.00%	17,150	December 2010	10,800
280 Park Avenue	Vornado Realty Trust	50.00%	50.00%	1,219,158	March 2011	400,000
1552-1560 Broadway(4)	Jeff Sutton	50.00%	50.00%	57,718	August 2011	136,550
10 East 53rd Street	Canadian Pension Plan Investment Board	55.00%	55.00%	354,300	February 2012	252,500
521 Fifth Avenue	Plaza Global Real Estate Partners LP	50.50%	50.50%	460,000	November 2012	315,000
21 East 66th Street(5)	Private Investors	32.28%	32.28%	13,069	December 2012	75,000
650 Fifth Avenue(6)	Jeff Sutton	50.00%	50.00%	69,214	November 2013	—
121 Greene Street	Jeff Sutton	50.00%	50.00%	7,131	September 2014	27,400
55 West 46th Street	Prudential Real Estate Investors	25.00%	25.00%	347,000	November 2014	295,000
Stonehenge Portfolio(7)	Various	Various	Various	1,439,016	February 2015	36,668
131-137 Spring Street(8)	Invesco Real Estate	20.00%	20.00%	68,342	August 2015	277,750
605 West 42nd Street	The Moinian Group	20.00%	20.00%	927,358	April 2016	759,000
11 Madison Avenue	PGIM Real Estate	60.00%	60.00%	2,314,000	August 2016	2,605,000
333 East 22nd Street	Private Investors	33.33%	33.33%	26,926	August 2016	—
400 East 57th Street(9)	BlackRock, Inc and Stonehenge Partners	51.00%	41.00%	290,482	October 2016	170,000
One Vanderbilt(10)	National Pension Service of Korea/Hines Interest LP	71.01%	71.01%	—	January 2017	3,310,000
Worldwide Plaza	RXR Realty / New York REIT / Private Investor	24.35%	24.35%	2,048,725	October 2017	1,725,000
1515 Broadway(11)	Allianz Real Estate of America	56.87%	56.87%	1,750,000	November 2017	1,950,000
2 Herald Square	Israeli Institutional Investor	51.00%	51.00%	369,000	November 2018	266,000

(1) Ownership interest and economic interest represent the Company's interests in the joint venture as of December 31, 2018. Changes in ownership or economic interests within the current year are disclosed in the notes below.

(2) Acquisition date and price represent the date on which the Company initially acquired an interest in the joint venture and the actual or implied gross purchase price for the joint venture on that date. Acquisition date and price are not adjusted for subsequent acquisitions or dispositions of interest.

(3) In January 2018, the partnership agreement for our investment was modified resulting in the Company no longer having a controlling interest in this investment. As a result the investment was deconsolidated as of January 1, 2018. The Company recorded its non-controlling interest at fair value resulting

105

SL Green Realty Corp. and SL Green Operating Partnership, L.P.

Notes to Consolidated Financial Statements (cont.)

December 31, 2018

in a $49.3 million fair value adjustment in the consolidated statement of operations. This fair value was allocated to the assets and liabilities, including identified intangibles of the property.

(4) The purchase price represents only the purchase of the 1552 Broadway interest which comprised approximately 13,045 square feet. The joint venture also owns a long-term leasehold interest in the retail space and certain other spaces at 1560 Broadway, which is adjacent to 1552 Broadway.

(5) We hold a 32.28% interest in three retail and two residential units at the property and a 16.14% interest in three residential units at the property.

(6) The joint venture owns a long-term leasehold interest in the retail space at 650 Fifth Avenue. In connection with the ground lease obligation, SLG provided a performance guaranty and our joint venture partner executed a contribution agreement to reflect its pro rata obligation. In the event the property is converted into a condominium unit and the landlord elects the purchase option, the joint venture shall be obligated to acquire the unit at the then fair value.

(7) In February and March 2018, the Company, together with its joint venture partner, closed on the sale of two properties from the Stonehenge Portfolio. These sales are further described under Sale of Joint Venture Interest of Properties below.

(8) In January 2019, we closed on the sale of our interest in this property to our joint venture partner. The transaction generated net cash proceeds to the Company of $15.2 million.

(9) In October 2016, the Company sold a 49% interest in this property to an investment account managed by BlackRock, Inc. The Company's interest in the property was sold within a consolidated joint venture owned 90% by the Company and 10% by Stonehenge. The transaction resulted in the deconsolidation of the venture's remaining 51% interest in the property. The Company's joint venture with Stonehenge remains consolidated resulting in the combined 51% interest being shown within investments in unconsolidated joint ventures on the Company's balance sheet.

(10) The partners have committed aggregate equity to the project totaling no less than $525 million and their ownership interest in the joint venture is based on their capital contributions, up to an aggregate maximum of 29.0%. At December 31, 2018 the total of the two partners' ownership interests based on equity contributed was 23.4%.

(11) In November 2017, the Company sold a 30% interest in 1515 Broadway to affiliates of Allianz Real Estate. The sale did not meet the criteria for sale accounting and as a result the property was accounted for under the profit sharing method at December 31, 2017. The Company achieved sale accounting upon adoption of ASC 610-20 in January 2018 and recorded a $0.6 billion gain from the sale of the partial interest and related step-up in basis to fair value of the retained non-controlling interest as an adjustment to beginning retained earnings based on the application of the modified retrospective adoption approach. The Company closed on the sale of an additional 13% interest in the property to Allianz in February 2018.

Acquisition, Development and Construction Arrangements

Based on the characteristics of the following arrangements, which are similar to those of an investment, combined with the expected residual profit of not greater than 50%, we have accounted for these debt and preferred equity investments under the equity method. As of December 31, 2018 and 2017, the carrying value for acquisition, development and construction arrangements were as follows (in thousands):

Loan Type	December 31, 2018		December 31, 2017		Maturity Date
Mezzanine Loan(1)	$	44,357	44,823		February 2022
Mezzanine Loan and Preferred Equity (2)	—		100,000
Mezzanine Loan(3)	—		26,716
	$	44,357	$	171,539

(1) We have an option to convert our loan to an equity interest subject to certain conditions. We have determined that our option to convert the loan to equity is not a derivative financial instrument pursuant to GAAP.

(2) The mezzanine loan was repaid and the preferred equity interest was redeemed in March 2018.

(3) The Company was redeemed on this investment in July 2018.

106

SL Green Realty Corp. and SL Green Operating Partnership, L.P.

Notes to Consolidated Financial Statements (cont.)

December 31, 2018

Disposition of Joint Venture Interests or Properties

The following table summarizes the investments in unconsolidated joint ventures sold during the years ended December 31, 2018, 2017, and 2016:

Property	Ownership Interest Sold	Disposition Date	Type of Sale	Gross Asset Valuation (in thousands)(1)		Gain (Loss) on Sale (in thousands)(2)
3 Columbus Circle	48.90%	November 2018	Ownership Interest	$	851,000	$	160,368
Mezzanine Loan(3)	33.33%	August 2018	Repayment	15,000		N/A
724 Fifth Avenue	49.90%	July 2018	Ownership Interest	365,000		64,587
Jericho Plaza(4)	11.67%	June 2018	Ownership Interest	117,400		147
1745 Broadway	56.87%	May 2018	Property	633,000		52,038
175-225 Third Street Brooklyn, New York	95.00%	April 2018	Property	115,000		19,483
Stonehenge Village(5)	0.50%	March 2018	Property	287,000		(5,701		)
1515 Broadway(6)	13.00%	February 2018	Ownership Interest	1,950,000		—
1274 Fifth Avenue(5)	9.83%	February 2018	Property	44,100		(362		)
102 Greene Street	10.00%	September 2017	Ownership Interest	43,500		283
76 11th Avenue(7)	33.33%	May 2017	Repayment	138,240		N/A
Stonehenge Portfolio (partial)(6)	Various	March 2017	Ownership Interest	300,000		871
EOP Denver	0.48%	September 2016	Ownership Interest	180,700		300
33 Beekman (8)	45.90%	May 2016	Property	196,000		33,000
EOP Denver	4.79%	March 2016	Ownership Interest	180,700		2,800
7 Renaissance Square	50.00%	March 2016	Property	20,700		4,200
Jericho Plaza (4)	66.11%	February 2016	Ownership Interest	95,200		3,300

(1) Represents implied gross valuation for the joint venture or sales price of the property.

(2) Represents the Company's share of the gain or loss. The gain on sale is net of $11.7 million, $0, and $1.1 million of employee compensation accrued in connection with the realization of these investment gains in the years ended December 31, 2018, 2017, and 2016, respectively. Additionally, gain (loss) amounts do not include adjustments for expenses recorded in subsequent periods.

(3) Our investment in a joint venture that owned a mezzanine loan secured by a commercial property in midtown Manhattan was repaid after the joint venture received repayment of the underlying loan.

(4) We sold our 11.67% interest in June 2018. In the first quarter of 2016, our ownership percentage was reduced from 77.78% to 11.67%, upon completion of a restructuring of the joint venture.

(5) Properties were part of the Stonehenge Portfolio.

(6) Our investment in 1515 Broadway was marked to fair value on January 1, 2018 upon adoption of ASC 610-20.

(7) Our investment in a joint venture that owned two mezzanine notes secured by interests in the entity that owns 76 11th Avenue was repaid after the joint venture received repayment of the underlying loans.

(8) In connection with the sale of the property, we also recognized a promote of $10.8 million.

In May 2017, we recognized a gain of $13.0 million related to the sale in May 2014 of our ownership interest in 747 Madison Avenue. The sale did not meet the criteria for sale accounting at that time and, therefore, remained on our consolidated financial statements. The sale criteria was met in May of 2017 resulting in recognition of the deferred gain on the sale.

Joint Venture Mortgages and Other Loans Payable

We generally finance our joint ventures with non-recourse debt. In certain cases we may provide guarantees or master leases for tenant space, which terminate upon the satisfaction of specified circumstances or repayment of the underlying loans. The first mortgage notes and other loans payable collateralized by the respective joint venture properties and assignment of leases at December 31, 2018 and 2017, respectively, are as follows (amounts in thousands):

107

SL Green Realty Corp. and SL Green Operating Partnership, L.P.

Notes to Consolidated Financial Statements (cont.)

December 31, 2018

Property	Economic Interest (1)		Maturity Date	Interest Rate (2)		December 31, 2018			December 31, 2017
Fixed Rate Debt:
521 Fifth Avenue	50.50	%	November 2019		3.73%	$	170,000		$	170,000
717 Fifth Avenue (3)	10.92	%	July 2022		4.45%	300,000			300,000
717 Fifth Avenue (3)	10.92	%	July 2022		5.50%	355,328			355,328
650 Fifth Avenue (4)	50.00	%	October 2022		4.46%	210,000			210,000
650 Fifth Avenue (4)	50.00	%	October 2022		5.45%	65,000			65,000
21 East 66th Street	32.28	%	April 2023		3.60%	12,000			12,000
919 Third Avenue	51.00	%	June 2023		5.12%	500,000			—
1515 Broadway	56.87	%	March 2025		3.93%	855,876			872,528
11 Madison Avenue	60.00	%	September 2025		3.84%	1,400,000			1,400,000
800 Third Avenue	60.52	%	February 2026		3.37%	177,000			177,000
400 East 57th Street	41.00	%	November 2026		3.00%	99,828			100,000
Worldwide Plaza	24.35	%	November 2027		3.98%	1,200,000			1,200,000
Stonehenge Portfolio (5)	Various		Various		4.20%	321,076			357,282
3 Columbus Circle (6)						—			350,000
Total fixed rate debt						$	5,666,108		$	5,569,138
Floating Rate Debt:
280 Park Avenue	50.00	%	September 2019	L+	1.73%	$	1,200,000		$	1,200,000
121 Greene Street	50.00	%	November 2019	L+	1.50%	15,000			15,000
10 East 53rd Street	55.00	%	February 2020	L+	2.25%	170,000			170,000
131-137 Spring Street (7)	20.00	%	August 2020	L+	1.55%	141,000			141,000
1552 Broadway	50.00	%	October 2020	L+	2.65%	195,000			195,000
55 West 46th Street (8)	25.00	%	November 2020	L+	2.13%	185,569			171,444
11 West 34th Street	30.00	%	January 2021	L+	1.45%	23,000			23,000
103 East 86th Street (9)	1.00	%	January 2021	L+	1.40%	38,000			55,340
100 Park Avenue	49.90	%	February 2021	L+	1.75%	360,000			360,000
One Vanderbilt (10)	71.01	%	September 2021	L+	2.75%	375,000			355,535
2 Herald Square (11)	51.00	%	November 2021	L+	1.55%	133,565			—
605 West 42nd Street	20.00	%	August 2027	L+	1.44%	550,000			550,000
21 East 66th Street	32.28	%	June 2033	1 Year Treasury+	2.75%	1,571			1,648
175-225 Third Street Brooklyn, New York (12)						—			40,000
1745 Broadway (12)						—			345,000
Jericho Plaza (13)						—			81,099
724 Fifth Avenue (14)						—			275,000
Total floating rate debt						$	3,387,705		$	3,979,066
Total joint venture mortgages and other loans payable						$	9,053,813		$	9,548,204
Deferred financing costs, net						(103,191		)	(136,103		)
Total joint venture mortgages and other loans payable, net						$	8,950,622		$	9,412,101

(1) Economic interest represents the Company's interests in the joint venture as of December 31, 2018. Changes in ownership or economic interests, if any, within the current year are disclosed in the notes to the investment in unconsolidated joint ventures table above.

(2) Interest rate as of December 31, 2018, taking into account interest rate hedges in effect during the period. Floating rate debt is presented with the stated interest rate spread over 30-day LIBOR, unless otherwise specified.

(3) These loans are comprised of a $300.0 million fixed rate mortgage loan and $355.3 million mezzanine loan. The mezzanine loan is subject to accretion based on the difference between contractual interest rate and contractual pay rate.

(4) These loans are comprised of a $210.0 million fixed rate mortgage loan and $65.0 million fixed rate mezzanine loan.

(5) Amount is comprised of $134.3 million, $54.1 million, and $132.6 million in fixed-rated mortgages that mature in August 2019, June 2024, and April 2028, respectively.

(6) In November 2018, we closed on the sale of our interest in the property to our joint venture partner.

108

SL Green Realty Corp. and SL Green Operating Partnership, L.P.

Notes to Consolidated Financial Statements (cont.)

December 31, 2018

(7) In January 2019, we closed on the sale of our interest in this property to our joint venture partner.

(8) This loan has a committed amount of $195.0 million, of which $9.4 million was unfunded as of December 31, 2018.

(9) In February 2019, along with our joint venture partner, we closed on the sale of the property.

(10) This loan is a $1.75 billion construction facility, with reductions in interest cost based on meeting certain conditions, and has an initial five-year term with twoone-year extension options. Advances under the loan are subject to incurred costs, funded equity, loan to value thresholds, and entering into construction contracts.

(11) This loan has a committed amount of $150.0 million.

(12) In 2018, along with our joint venture partner, we closed on the sale of the property.

(13) In 2018, we closed on the sale of our interest in the property.

(14) In 2018, we closed on the sale of substantially all of our interest in the property to our joint venture partner.

We act as the operating partner and day-to-day manager for all our joint ventures, except for Worldwide Plaza, 800 Third Avenue, 280 Park Avenue, 21 East 66th Street, 605 West 42nd Street, 400 East 57th Street, and the Stonehenge Portfolio. We are entitled to receive fees for providing management, leasing, construction supervision and asset management services to certain of our joint ventures. We earned $14.2 million, $22.6 million and $4.0 million from these services, net of our ownership share of the joint ventures, for the years ended December 31, 2018, 2017, and 2016, respectively. In addition, we have the ability to earn incentive fees based on the ultimate financial performance of certain of the joint venture properties.

The combined balance sheets for the unconsolidated joint ventures, at December 31, 2018 and 2017, are as follows (in thousands):

	December 31, 2018		December 31, 2017
Assets (1)
Commercial real estate property, net	$	14,347,673	$	12,822,133
Cash and restricted cash	381,301		494,909
Tenant and other receivables, related party receivables, and deferred rents receivable, net of allowance	273,141		349,944
Debt and preferred equity investments, net	44,357		202,539
Other assets	2,187,166		1,407,806
Total assets	$	17,233,638	$	15,277,331
Liabilities and equity (1)
Mortgages and other loans payable, net	$	8,950,622	$	9,412,101
Deferred revenue/gain	1,660,838		985,648
Other liabilities	946,313		411,053
Equity	5,675,865		4,468,529
Total liabilities and equity	$	17,233,638	$	15,277,331
Company's investments in unconsolidated joint ventures	$	3,019,020	$	2,362,989

(1) The combined assets, liabilities and equity for the unconsolidated joint ventures reflects the effect of step ups in basis on the retained non-controlling interests in deconsolidated investments as a result of the adoption of ASC 610-20 in January 2018.

109

SL Green Realty Corp. and SL Green Operating Partnership, L.P.

Notes to Consolidated Financial Statements (cont.)

December 31, 2018

The combined statements of operations for the unconsolidated joint ventures, from acquisition date through the years ended December 31, 2018, 2017, and 2016 are as follows (in thousands):

	Year Ended December 31,
	2018			2017			2016
Total revenues	$	1,244,804		$	904,230		$	712,689
Operating expenses	219,440			157,610			126,913
Real estate taxes	226,961			142,774			111,673
Ground rent	18,697			16,794			14,924
Interest expense, net of interest income	363,055			250,063			197,741
Amortization of deferred financing costs	21,634			23,026			24,829
Transaction related costs	—			146			5,566
Depreciation and amortization	421,458			279,419			199,011
Total expenses	$	1,271,245		$	869,832		$	680,657
Loss on early extinguishment of debt	—			(7,899		)	(1,606		)
Net (loss) income before gain on sale (1)	$	(26,441	)	$	26,499		$	30,426
Company's equity in net income from unconsolidated joint ventures (1)	$	7,311		$	21,892		$	11,874

(1) The combined statements of operations and the Company's equity in net income for the unconsolidated joint ventures reflects the effect of step ups in basis on the retained non-controlling interests in deconsolidated investments as a result of the adoption of ASC 610-20 in January 2018.

7. Deferred Costs

Deferred costs at December 31, 2018 and 2017 consisted of the following (in thousands):

	December 31,
	2018			2017
Deferred leasing costs	$	453,833		$	443,341
Less: accumulated amortization	(244,723		)	(217,140		)
Deferred costs, net	$	209,110		$	226,201

110

SL Green Realty Corp. and SL Green Operating Partnership, L.P.

Notes to Consolidated Financial Statements (cont.)

December 31, 2018

8. Mortgages and Other Loans Payable

The first mortgages and other loans payable collateralized by the respective properties and assignment of leases or debt investments at December 31, 2018 and 2017, respectively, were as follows (amounts in thousands):

Property	Maturity Date	Interest Rate (1)		December 31, 2018			December 31, 2017
Fixed Rate Debt:
762 Madison Avenue	February 2022		5.00%	771			771
100 Church Street	July 2022		4.68%	213,208			217,273
420 Lexington Avenue	October 2024		3.99%	300,000			300,000
400 East 58th Street (2)	November 2026		3.00%	39,931			40,000
Landmark Square	January 2027		4.90%	100,000			100,000
485 Lexington Avenue	February 2027		4.25%	450,000			450,000
1080 Amsterdam (3)	February 2027		3.58%	35,807			36,363
315 West 33rd Street	February 2027		4.17%	250,000			250,000
919 Third Avenue (4)				—			500,000
Unsecured Loan (5)				—			16,000
Series J Preferred Units (6)				—			4,000
One Madison Avenue (7)				—			486,153
Total fixed rate debt				$	1,389,717		$	2,400,560
Floating Rate Debt:
FHLB Facility	May 2019	L+	0.27%	$	13,000		$	—
2017 Master Repurchase Agreement	June 2019	L+	2.34%	300,000			90,809
FHLB Facility	December 2019	L+	0.18%	14,500			—
133 Greene Street	August 2020	L+	2.00%	15,523			—
185 Broadway (8)	November 2021	L+	2.85%	111,869			58,000
712 Madison	December 2021	L+	2.50%	28,000			—
115 Spring Street	September 2023	L+	3.40%	65,550			—
719 Seventh Avenue	September 2023	L+	1.20%	50,000			41,622
220 East 42nd Street (9)				—			275,000
Total floating rate debt				$	598,442		$	465,431
Total fixed rate and floating rate debt				$	1,988,159		$	2,865,991
Mortgages reclassed to liabilities related to assets held for sale				—			—
Total mortgages and other loans payable				$	1,988,159		$	2,865,991
Deferred financing costs, net of amortization				(26,919		)	(28,709		)
Total mortgages and other loans payable, net				$	1,961,240		$	2,837,282

(1) Interest rate as of December 31, 2018, taking into account interest rate hedges in effect during the period. Floating rate debt is presented with the stated interest rate spread over 30-day LIBOR, unless otherwise specified.

(2) The loan carries a fixed interest rate of 300 basis points for the first five years and is prepayable without penalty at the end of year five.

(3) The loan is comprised of a $35.5 million mortgage loan and $0.9 million subordinate loan with a fixed interest rate of 350 basis points and 700 basis points, respectively, for the first five years and is prepayable without penalty at the end of year five.

(4) Our investment in the property was deconsolidated as of January 1, 2018. See Note 6, "Investments in Unconsolidated Joint Ventures".

(5) In May 2018, the loan was repaid in connection with the sale of the property.

(6) In June 2018, the Series J Preferred Units were redeemed in connection with the sale of the property.

(7) In 2018, the Company recognized a $14.9 million loss on extinguishment of debt related to the early repayment of this loan.

(8) This loan is a $225.0 million construction facility, with reductions in interest cost based on meeting certain conditions, and has an initial three-year term with twoone-year extension options. Advances under the loan are subject to incurred costs and funded equity requirements.

(9) In 2018, the mortgage was repaid.

111

SL Green Realty Corp. and SL Green Operating Partnership, L.P.

Notes to Consolidated Financial Statements (cont.)

December 31, 2018

At December 31, 2018 and 2017, the gross book value of the properties and debt and preferred equity investments collateralizing the mortgages and other loans payable, not including assets held for sale, was approximately $3.9 billion and $4.8 billion, respectively.

Federal Home Loan Bank of New York Facility

The Company’s wholly-owned subsidiary, Ticonderoga Insurance Company, or Ticonderoga, a Vermont licensed captive insurance company, is a member of the Federal Home Loan Bank of New York, or FHLBNY. As a member, Ticonderoga may borrow funds from the FHLBNY in the form of secured advances. As of December 31, 2018, we had $13.0 million and $14.5 million in outstanding secured advances with a borrowing rate of 30-day LIBOR over 27 basis points and 30-day LIBOR over 18 basis points, respectively.

Master Repurchase Agreements

The Company has entered into two Master Repurchase Agreements, or MRAs, known as the 2016 MRA and 2017 MRA, which provide us with the ability to sell certain debt investments with a simultaneous agreement to repurchase the same at a certain date or on demand. We seek to mitigate risks associated with our repurchase agreement by managing the credit quality of our assets, early repayments, interest rate volatility, liquidity, and market value. The margin call provisions under our repurchase facilities permit valuation adjustments based on capital markets activity, and are not limited to collateral-specific credit marks. To monitor credit risk associated with our debt investments, our asset management team regularly reviews our investment portfolio and is in contact with our borrowers in order to monitor the collateral and enforce our rights as necessary. The risk associated with potential margin calls is further mitigated by our ability to recollateralize the facility with additional assets from our portfolio of debt investments, our ability to satisfy margin calls with cash or cash equivalents and our access to additional liquidity through the 2017 credit facility, as defined below.

In June 2017, we entered into the 2017 MRA, with a maximum facility capacity of $300.0 million. In April 2018, we increased the maximum facility capacity to $400.0 million. The facility bears interest on a floating rate basis at a spread to 30-day LIBOR based on the pledged collateral and advance rate and has an initial one year term, with twoone year extension options. In June 2018, we exercised a one year extension option. At December 31, 2018, the facility had a carrying value of $299.6 million, net of deferred financing costs.

In July 2016, we entered into a restated 2016 MRA, with a maximum facility capacity of $300.0 million. In June 2018, we terminated the restated 2016 MRA. The facility bore interest ranging from 225 and 400 basis points over 30-day LIBOR depending on the pledged collateral and had an initial two-year term, with a one year extension option. Since December 6, 2015, we had been required to pay monthly in arrears a 25 basis point fee on the excess of $150.0 million over the average daily balance during the period when the average daily balance was less than $150.0 million.

9. Corporate Indebtedness

2017 Credit Facility

In November 2017, we entered into an amendment to the credit facility, referred to as the 2017 credit facility, that was originally entered into by the Company in November 2012, or the 2012 credit facility. As of December 31, 2018, the 2017 credit facility consisted of a $1.5 billion revolving credit facility, a $1.3 billion term loan (or "Term Loan A"), and a $200.0 million term loan (or "Term Loan B") with maturity dates of March 31, 2022, March 31, 2023, and November 21, 2024, respectively. The revolving credit facility has twosix-month as-of-right extension options to March 31, 2023. We also have an option, subject to customary conditions, to increase the capacity of the credit facility to $4.5 billion at any time prior to the maturity dates for the revolving credit facility and term loans without the consent of existing lenders, by obtaining additional commitments from our existing lenders and other financial institutions.

As of December 31, 2018, the 2017 credit facility bore interest at a spread over 30-day LIBOR ranging from (i) 82.5 basis points to 155 basis points for loans under the revolving credit facility, (ii) 90 basis points to 175 basis points for loans under Term Loan A, and (iii) 150 basis points to 245 basis points for loans under Term Loan B, in each case based on the credit rating assigned to the senior unsecured long term indebtedness of the Company.

At December 31, 2018, the applicable spread was 100 basis points for the revolving credit facility, 110 basis points for Term Loan A, and 165 basis points for Term Loan B. We are required to pay quarterly in arrears a 12.5 to 30 basis point facility fee on the total commitments under the revolving credit facility based on the credit rating assigned to the senior unsecured long term indebtedness of the Company. As of December 31, 2018, the facility fee was 20 basis points.

112

SL Green Realty Corp. and SL Green Operating Partnership, L.P.

Notes to Consolidated Financial Statements (cont.)

December 31, 2018

As of December 31, 2018, we had $11.8 million of outstanding letters of credit, $500.0 million drawn under the revolving credit facility and $1.5 billion outstanding under the term loan facilities, with total undrawn capacity of $1.0 billion under the 2017 credit facility. At December 31, 2018 and December 31, 2017, the revolving credit facility had a carrying value of $492.2 million and $30.3 million, respectively, net of deferred financing costs. At December 31, 2018 and December 31, 2017, the term loan facilities had a carrying value of $1.5 billion and $1.5 billion, respectively, net of deferred financing costs.

The Company and the Operating Partnership are borrowers jointly and severally obligated under the 2017 credit facility.

The 2017 credit facility includes certain restrictions and covenants (see Restrictive Covenants below).

Senior Unsecured Notes

The following table sets forth our senior unsecured notes and other related disclosures as of December 31, 2018 and 2017, respectively, by scheduled maturity date (amounts in thousands):

Issuance	December 31, 2018 Unpaid Principal Balance		December 31, 2018 Accreted Balance			December 31, 2017 Accreted Balance			Interest Rate (1)			Initial Term (in Years)	Maturity Date
March 16, 2010 (2)	$	250,000	$	250,000		$	250,000			7.75	%	10	March 2020
August 7, 2018 (3) (4)	350,000		350,000			—			L+	0.98	%	3	August 2021
October 5, 2017 (3)	500,000		499,591			499,489				3.25	%	5	October 2022
November 15, 2012 (5)	300,000		304,168			305,163				4.50	%	10	December 2022
December 17, 2015 (2)	100,000		100,000			100,000				4.27	%	10	December 2025
August 5, 2011 (2) (6)	—		—			249,953
	$	1,500,000	$	1,503,759		$	1,404,605
Deferred financing costs, net			(8,545		)	(8,666		)
	$	1,500,000	$	1,495,214		$	1,395,939

(1) Interest rate as of December 31, 2018, taking into account interest rate hedges in effect during the period. Floating rate notes are presented with the stated spread over 3-month LIBOR, unless otherwise specified. Interest on the senior unsecured notes is payable semi-annually with principal and unpaid interest due on the scheduled maturity dates.

(2) Issued by the Company and the Operating Partnership as co-obligors.

(3) Issued by the Operating Partnership with the Company as the guarantor.

(4) Beginning on August 8, 2019 and at any time thereafter, the notes are subject to redemption at the Company's option, in whole but not in part, at a redemption price equal to 100% of the principal amount of the notes, plus unpaid accrued interest thereon to the redemption date.

(5) In October 2017, the Company and the Operating Partnership as co-obligors issued an additional $100.0 million of 4.50% senior unsecured notes due December 2022. The notes were priced at 105.334%.

(6) The balance was repaid in August 2018.

113

SL Green Realty Corp. and SL Green Operating Partnership, L.P.

Notes to Consolidated Financial Statements (cont.)

December 31, 2018

Restrictive Covenants

The terms of the 2017 credit facility and certain of our senior unsecured notes include certain restrictions and covenants which may limit, among other things, our ability to pay dividends, make certain types of investments, incur additional indebtedness, incur liens and enter into negative pledge agreements and dispose of assets, and which require compliance with financial ratios relating to the maximum ratio of total indebtedness to total asset value, a minimum ratio of EBITDA to fixed charges, a maximum ratio of secured indebtedness to total asset value and a maximum ratio of unsecured indebtedness to unencumbered asset value. The dividend restriction referred to above provides that, we will not during any time when a default is continuing, make distributions with respect to common stock or other equity interests, except to enable the Company to continue to qualify as a REIT for Federal income tax purposes. As of December 31, 2018 and 2017, we were in compliance with all such covenants.

Junior Subordinated Deferrable Interest Debentures

In June 2005, the Company and the Operating Partnership issued $100.0 million in unsecured trust preferred securities through a newly formed trust, SL Green Capital Trust I, or the Trust, which is a wholly-owned subsidiary of the Operating Partnership. The securities mature in 2035 and bear interest at a floating rate of 125 basis points over the three-month LIBOR. Interest payments may be deferred for a period of up to eight consecutive quarters if the Operating Partnership exercises its right to defer such payments. The Trust preferred securities are redeemable at the option of the Operating Partnership, in whole or in part, with no prepayment premium. We do not consolidate the Trust even though it is a variable interest entity as we are not the primary beneficiary. Because the Trust is not consolidated, we have recorded the debt on our consolidated balance sheets and the related payments are classified as interest expense.

Principal Maturities

Combined aggregate principal maturities of mortgages and other loans payable, 2017 credit facility, trust preferred securities, senior unsecured notes and our share of joint venture debt as of December 31, 2018, including as-of-right extension options and put options, were as follows (in thousands):

	Scheduled Amortization		Principal		Revolving Credit Facility		Unsecured Term Loans		Trust Preferred Securities		Senior Unsecured Notes		Total		Joint Venture Debt
2019	$	6,241	$	27,500	$	—	$	—	$	—	$	—	$	33,741	$	115,295
2020	11,117		315,523		—		—		—		250,000		576,640		278,791
2021	11,636		139,869		—		—		—		350,000		501,505		518,371
2022	9,429		198,588		—		—		—		800,000		1,008,017		220,810
2023	7,301		115,550		500,000		1,300,000		—		—		1,922,851		277,996
Thereafter	9,290		1,136,115		—		200,000		100,000		100,000		1,545,405		2,430,198
	$	55,014	$	1,933,145	$	500,000	$	1,500,000	$	100,000	$	1,500,000	$	5,588,159	$	3,841,461

Consolidated interest expense, excluding capitalized interest, was comprised of the following (in thousands):

	Year Ended December 31,
	2018			2017			2016
Interest expense before capitalized interest	$	244,788		$	284,649		$	348,062
Interest capitalized	(34,162		)	(26,020		)	(24,067		)
Interest income	(1,957		)	(1,584		)	(2,796		)
Interest expense, net	$	208,669		$	257,045		$	321,199

10. Related Party Transactions

Cleaning/ Security/ Messenger and Restoration Services

Alliance Building Services, or Alliance, and its affiliates are partially owned by Gary Green, a son of Stephen L. Green, who serves as a member and as the chairman emeritus of our board of directors, and provide services to certain properties owned by us. Alliance’s affiliates include First Quality Maintenance, L.P., or First Quality, Classic Security LLC, Bright Star Couriers LLC and Onyx Restoration Works, and provide cleaning, extermination, security, messenger, and restoration services, respectively. In addition, First Quality has the non-exclusive opportunity to provide cleaning and related services to individual tenants at our properties on a basis separately negotiated with any tenant seeking such additional services. The Service Corporation has entered

114

SL Green Realty Corp. and SL Green Operating Partnership, L.P.

Notes to Consolidated Financial Statements (cont.)

December 31, 2018

into an arrangement with Alliance whereby it will receive a profit participation above a certain threshold for services provided by Alliance to certain tenants at certain buildings above the base services specified in their lease agreements.

Income earned from the profit participation, which is included in other income on the consolidated statements of operations, was $3.9 million, $3.9 million and $3.5 million for the years ended December 31, 2018, 2017 and 2016, respectively.

We also recorded expenses, inclusive of capitalized expenses, of $18.8 million, $22.6 million and $23.4 million the years ended December 31, 2018, 2017 and 2016, respectively, for these services (excluding services provided directly to tenants).

Management Fees

S.L. Green Management Corp., a consolidated entity, receives property management fees from an entity in which Stephen L. Green owns an interest. We received management fees from this entity of $0.6 million, $0.5 million and $0.7 million for the years ended December 31, 2018, 2017, and 2016 respectively.

One Vanderbilt Investment

In December 2016, we entered into agreements with entities owned and controlled by Marc Holliday and Andrew Mathias, pursuant to which they agreed to make an investment in our One Vanderbilt project at the appraised fair market value for the interests acquired. This investment entitles these entities to receive approximately 1.50% - 1.80% and 1.00% - 1.20%, respectively, of any profits realized by the Company from its One Vanderbilt project in excess of the Company’s capital contributions. The entities have no right to any return of capital. Accordingly, subject to previously disclosed repurchase rights, these interests will have no value and will not entitle these entities to any amounts (other than limited distributions to cover tax liabilities incurred) unless and until the Company has received distributions from the One Vanderbilt project in excess of the Company’s aggregate investment in the project. In the event that the Company does not realize a profit on its investment in the project (or would not realize a profit based on the value at the time the interests are repurchased), the entities owned and controlled by Messrs. Holliday and Mathias will lose the entire amount of their investment. The entities owned and controlled by Messrs. Holliday and Mathias paid $1.4 million and $1.0 million, respectively, which equal the fair market value of the interests acquired as of the date the investment agreements were entered into as determined by an independent third party appraisal that we obtained.

Messrs. Holliday and Mathias cannot monetize their interests until after stabilization of the property (50% within three years after stabilization and 100% three years or more after stabilization). In addition, the agreement calls for us to repurchase these interests in the event of a sale of One Vanderbilt or a transactional change of control of the Company. We also have the right to repurchase these interests on the seven-year anniversary of the stabilization of the project or upon the occurrence of certain separation events prior to the stabilization of the project relating to each of Messrs. Holliday’s and Mathias’s continued service with us. The price paid upon monetization of the interests will equal the liquidation value of the interests at the time, with the value of One Vanderbilt being based on its sale price, if applicable, or fair market value as determined by an independent third party appraiser.

Other

We are entitled to receive fees for providing management, leasing, construction supervision, and asset management services to certain of our joint ventures as further described in Note 6, "Investments in Unconsolidated Joint Ventures." Amounts due from joint ventures and related parties at December 31, 2018 and 2017 consisted of the following (in thousands):

	December 31,
	2018		2017
Due from joint ventures	$	18,655	$	15,025
Other	9,378		8,014
Related party receivables	$	28,033	$	23,039

11. Noncontrolling Interests on the Company's Consolidated Financial Statements

Noncontrolling interests represent the common and preferred units of limited partnership interest in the Operating Partnership not held by the Company as well as third party equity interests in our other consolidated subsidiaries. Noncontrolling interests in the Operating Partnership are shown in the mezzanine equity while the noncontrolling interests in our other consolidated subsidiaries are shown in the equity section of the Company’s consolidated financial statements.

115

SL Green Realty Corp. and SL Green Operating Partnership, L.P.

Notes to Consolidated Financial Statements (cont.)

December 31, 2018

Common Units of Limited Partnership Interest in the Operating Partnership

As of December 31, 2018 and 2017, the noncontrolling interest unit holders owned 4.70%, or 4,130,579 units, and 4.58%, or 4,452,979 units, of the Operating Partnership, respectively. As of December 31, 2018, 4,130,579 shares of our common stock were reserved for issuance upon the redemption of units of limited partnership interest of the Operating Partnership.

Noncontrolling interests in the Operating Partnership is recorded at the greater of its cost basis or fair market value based on the closing stock price of our common stock at the end of the reporting period.

Below is a summary of the activity relating to the noncontrolling interests in the Operating Partnership as of December 31, 2018 and 2017 (in thousands):

	December 31,
	2018			2017
Balance at beginning of period	$	461,954		$	473,882
Distributions	(15,000		)	(14,266		)
Issuance of common units	23,655			25,723
Redemption of common units	(60,718		)	(21,574		)
Net income	12,216			3,995
Accumulated other comprehensive income allocation	(66		)	(94		)
Fair value adjustment	(34,236		)	(5,712		)
Balance at end of period	$	387,805		$	461,954

Preferred Units of Limited Partnership Interest in the Operating Partnership

The Operating Partnership has 1,902,0004.50% Series G Preferred Units of limited partnership interest, or the Series G Preferred Units outstanding, with a liquidation preference of $25.00 per unit, which were issued in January 2012 in conjunction with an acquisition. The Series G Preferred unitholders receive annual dividends of $1.125 per unit paid on a quarterly basis and dividends are cumulative, subject to certain provisions. The Series G Preferred Units are convertible into a number of common units of limited partnership interest in the Operating Partnership equal to (i) the liquidation preference plus accumulated and unpaid distributions on the conversion date divided by (ii) $88.50. The common units of limited partnership interest in the Operating Partnership may be redeemed in exchange for our common stock on a 1-to-1 basis. The Series G Preferred Units also provide the holder with the right to require the Operating Partnership to repurchase the Series G Preferred Units for cash before January 31, 2022.

The Operating Partnership has 60 Series F Preferred Units outstanding with a mandatory liquidation preference of $1,000.00 per unit.

The Operating Partnership has authorized up to 700,0003.50% Series K Preferred Units of limited partnership interest, or the Series K Preferred Units, with a liquidation preference of $25.00 per unit. In August 2014, the Company issued 563,954 Series K Preferred Units in conjunction with an acquisition. The Series K Preferred unitholders receive annual dividends of $0.875 per unit paid on a quarterly basis and dividends are cumulative, subject to certain provisions. The Series K Preferred Units can be redeemed at any time, at the option of the unitholder, either for cash or are convertible into a number of common units of limited partnership interest in the Operating Partnership equal to (i) the liquidation preference plus accumulated and unpaid distributions on the conversion date divided by (ii) $134.67.

The Operating Partnership has authorized up to 500,0004.00% Series L Preferred Units of limited partnership interest, or the Series L Preferred Units, with a liquidation preference of $25.00 per unit. In August 2014, the Company issued 378,634 Series L Preferred Units in conjunction with an acquisition. The Series L Preferred unitholders receive annual dividends of $1.00 per unit paid on a quarterly basis and dividends are cumulative, subject to certain provisions. The Series L Preferred Units can be redeemed at any time at par for cash at the option of the unitholder.

The Operating Partnership has authorized up to 1,600,0003.75% Series M Preferred Units of limited partnership interest, or the Series M Preferred Units, with a liquidation preference of $25.00 per unit. In February 2015, the Company issued 1,600,000 Series M Preferred Units in conjunction with the acquisition of ownership interests in and relating to certain residential and retail real estate properties. The Series M Preferred unitholders receive annual dividends of $0.9375 per unit paid on a quarterly basis and dividends are cumulative, subject to certain provisions. The Series M Preferred Units can be redeemed at any time at par for cash at the option of the unitholder.

116

SL Green Realty Corp. and SL Green Operating Partnership, L.P.

Notes to Consolidated Financial Statements (cont.)

December 31, 2018

The Operating Partnership has authorized up to 552,3033.00% Series N Preferred Units of limited partnership interest, or the Series N Preferred Units, with a liquidation preference of $25.00 per unit. In June 2015, the Company issued 552,303 Series N Preferred Units in conjunction with an acquisition. The Series N Preferred unitholders receive annual dividends of $0.75 per unit paid on a quarterly basis and dividends are cumulative, subject to certain provisions. The Series N Preferred Units can be redeemed at any time at par for cash at the option of the unitholder.

The Operating Partnership has authorized an aggregate of one6.25% Series O Preferred Unit of limited partnership interest, or the Series O Preferred Unit. In June 2015, the Company issued the Series O Preferred Unit in connection with an acquisition.

The Operating Partnership has authorized up to 200,0004.00% Series P Preferred Units of limited partnership interest, or the Series P Preferred Units, with a liquidation preference of $25.00 per unit. In July 2015, the Company issued 200,000 Series P Preferred Units in conjunction with an acquisition. The Series P Preferred unitholders receive annual dividends of $1.00 per unit paid on a quarterly basis and dividends are cumulative, subject to certain provisions. The Series P Preferred Units can be redeemed at any time at par for cash at the option of the unitholder.

The Operating Partnership has authorized up to 268,0003.50% Series Q Preferred Units of limited partnership interest, or the Series Q Preferred Units, with a liquidation preference of $25.00 per unit. In July 2015, the Company issued 268,000 Series Q Preferred Units in conjunction with an acquisition. The Series Q Preferred unitholders receive annual dividends of $0.875 per unit paid on a quarterly basis and dividends are cumulative, subject to certain provisions. The Series Q Preferred Units can be redeemed at any time, at the option of the unitholder, either for cash or are convertible into a number of common units of limited partnership interest in the Operating Partnership equal to (i) the liquidation preference plus accumulated and unpaid distributions on the conversion date divided by (ii) $148.95.

The Operating Partnership has authorized up to 400,0003.50% Series R Preferred Units of limited partnership interest, or the Series R Preferred Units, with a liquidation preference of $25.00 per unit. In August 2015, the Company issued 400,000 Series R Preferred Units in conjunction with an acquisition. The Series R Preferred unitholders receive annual dividends of $0.875 per unit paid on a quarterly basis and dividends are cumulative, subject to certain provisions. The Series R Preferred Units can be redeemed at any time, at the option of the unitholder, either for cash or are convertible into a number of common units of limited partnership interest in the Operating Partnership equal to (i) the liquidation preference plus accumulated and unpaid distributions on the conversion date divided by (ii) $154.89.

The Operating Partnership has authorized up to 1,077,2804.00% Series S Preferred Units of limited partnership interest, or the Series S Preferred Units, with a liquidation preference of $25.00 per unit. In August 2015, the Company issued 1,077,280 Series S Preferred Units in conjunction with an acquisition. The Series S Preferred unitholders receive annual dividends of $1.00 per unit paid on a quarterly basis and dividends are cumulative, subject to certain provisions. The Series S Preferred Units can be redeemed at any time at par for cash at the option of the unitholder.

The Operating Partnership has authorized up to 230,0002.75% Series T Preferred Units of limited partnership interest, or the Series T Preferred Units, with a liquidation preference of $25.00 per unit. In March 2016, the Company issued 230,000 Series T Preferred Units in conjunction with an acquisition. The Series T Preferred unitholders receive annual dividends of $0.6875 per unit paid on a quarterly basis and dividends are cumulative, subject to certain provisions. The Series T Preferred Units can be redeemed at any time at par, at the option of the unitholder, either for cash or are convertible into a number of common units of limited partnership interest in the Operating Partnership equal to (i) the liquidation preference plus accumulated and unpaid distributions on the conversion date divided by (ii) $119.02.

The Operating Partnership has authorized up to 680,0004.50% Series U Preferred Units of limited partnership interest, or the Series U Preferred Units, with a liquidation preference of $25.00 per unit. In March 2016, the Company issued 680,000 Series U Preferred Units in conjunction with an acquisition. The Series U Preferred unitholders initially receive annual dividends of $1.125 per unit paid on a quarterly basis and dividends are cumulative, subject to certain provisions. The annual dividend is subject to reduction upon the occurrence of certain circumstances set forth in the terms of the Series U Preferred Units. The minimum annual dividend is $0.75 per unit. The Series U Preferred Units can be redeemed at any time at par for cash at the option of the unitholder.

Through a consolidated subsidiary, we have authorized up to 109,1613.50% Series A Preferred Units of limited partnership interest, or the Subsidiary Series A Preferred Units, with a liquidation preference of $1,000.00 per unit. In August 2015, the Company issued 109,161 Subsidiary Series A Preferred Units in conjunction with an acquisition. The Subsidiary Series A Preferred unitholders receive annual dividends of $35.00 per unit paid on a quarterly basis and dividends are cumulative, subject to certain provisions. The Subsidiary Series A Preferred Units can be redeemed at any time, at the option of the unitholder, either for cash or are convertible on a one-for-one basis, into the Series B Preferred Units of limited partnership interest, or the Subsidiary Series

117

SL Green Realty Corp. and SL Green Operating Partnership, L.P.

Notes to Consolidated Financial Statements (cont.)

December 31, 2018

B Preferred Units. The Subsidiary Series B Preferred Units can be converted at any time, at the option of the unitholder, into a number of common stock equal to 6.71348 shares of common stock for each Subsidiary Series B Preferred Unit. As of December 31, 2018, no Subsidiary Series B Preferred Units have been issued.

Below is a summary of the activity relating to the preferred units in the Operating Partnership as of December 31, 2018 and 2017 (in thousands):

	December 31,
	2018			2017
Balance at beginning of period	$	301,735		$	302,010
Issuance of preferred units	—			—
Redemption of preferred units	(1,308		)	(275		)
Balance at end of period	$	300,427		$	301,735

12. Stockholders’ Equity of the Company

Common Stock

Our authorized capital stock consists of 260,000,000 shares, $0.01 par value per share, consisting of 160,000,000 shares of common stock, $0.01 par value per share, 75,000,000 shares of excess stock, at $0.01 par value per share, and 25,000,000 shares of preferred stock, par value $0.01 per share. As of December 31, 2018, 83,683,847 shares of common stock and no shares of excess stock were issued and outstanding.

Share Repurchase Program

In August 2016, our Board of Directors approved a share repurchase plan under which we can buy up to $1.0 billion of shares of our common stock. The Board of Directors has since authorized threeseparate $500.0 million increases to the size of the share repurchase program in the fourth quarter of 2017, second quarter of 2018, and fourth quarter of 2018, bringing the program total to $2.5 billion.

At December 31, 2018 repurchases executed under the plan were as follows:

Period	Shares repurchased	Average price paid per share	Cumulative number of shares repurchased as part of the repurchase plan or programs
Year ended 2017	8,342,411	$101.64	8,342,411
First quarter 2018	3,653,928	$97.07	11,996,339
Second quarter 2018	3,479,552	$97.22	15,475,891
Third quarter 2018	252,947	$99.75	15,728,838
Fourth quarter 2018	2,358,484	$93.04	18,087,322

At-The-Market Equity Offering Program

In March 2015, the Company, along with the Operating Partnership, entered into an "at-the-market" equity offering program, or ATM Program, to sell an aggregate of $300.0 million of our common stock. The Company did not make any sales of its common stock under the ATM program in the years ended December 31, 2018, 2017, or 2016.

Perpetual Preferred Stock

We have 9,200,000 shares of our 6.50% Series I Cumulative Redeemable Preferred Stock, or the Series I Preferred Stock, outstanding with a mandatory liquidation preference of $25.00 per share. The Series I Preferred stockholders receive annual dividends of $1.625 per share paid on a quarterly basis and dividends are cumulative, subject to certain provisions. We are entitled to redeem the Series I Preferred Stock at par for cash at our option. In August 2012, we received $221.9 million in net proceeds from the issuance of the Series I Preferred Stock, which were recorded net of underwriters' discount and issuance costs, and contributed the net proceeds to the Operating Partnership in exchange for 9,200,000 units of 6.50% Series I Cumulative Redeemable Preferred Units of limited partnership interest, or the Series I Preferred Units.

118

SL Green Realty Corp. and SL Green Operating Partnership, L.P.

Notes to Consolidated Financial Statements (cont.)

December 31, 2018

Dividend Reinvestment and Stock Purchase Plan ("DRSPP")

In February 2018, the Company filed a registration statement with the SEC for our dividend reinvestment and stock purchase plan, or DRSPP, which automatically became effective upon filing. The Company registered 3,500,000 shares of our common stock under the DRSPP. The DRSPP commenced on September 24, 2001.

The following table summarizes SL Green common stock issued, and proceeds received from dividend reinvestments and/or stock purchases under the DRSPP for the years ended December 31, 2018, 2017, and 2016, respectively (dollars in thousands):

	Year Ended December 31,
	2018		2017		2016
Shares of common stock issued	1,399		2,141		2,687
Dividend reinvestments/stock purchases under the DRSPP	$	136	$	223	$	277

Earnings per Share

We use the two-class method of computing earnings per share (“EPS”), which is an earnings allocation formula that determines EPS for common stock and any participating securities according to dividends declared (whether paid or unpaid). Under the two-class method, basic EPS is computed by dividing the income available to common stockholders by the weighted-average number of common stock shares outstanding for the period. Diluted EPS reflects the potential dilution that could occur from share equivalent activity.

SL Green's earnings per share for the years ended December 31, 2018, 2017, and 2016 are computed as follows (in thousands):

	Year Ended December 31,
Numerator	2018			2017			2016
Basic Earnings:
Income attributable to SL Green common stockholders	$	232,312		$	86,424		$	234,946
Less: distributed earnings allocated to participating securities	(552		)	$	(471	)	$	(634	)
Net income attributable to SL Green common stockholders (numerator for basic earnings per share)	$	231,760		$	85,953		$	234,312
Add back: undistributed earnings allocated to participating securities	552			471			634
Add back: Effect of dilutive securities (redemption of units to common shares)	12,216			3,995			10,136
Income attributable to SL Green common stockholders (numerator for diluted earnings per share)	$	244,528		$	90,419		$	245,082

	Year Ended December 31,
Denominator	2018	2017	2016
Basic Shares:
Weighted average common stock outstanding	86,753	98,571	100,185
Effect of Dilutive Securities:
Operating Partnership units redeemable for common shares	4,562	4,556	4,323
Stock-based compensation plans	215	276	373
Diluted weighted average common stock outstanding	91,530	103,403	104,881

SL Green has excluded 1,138,647, 774,782 and 263,991 common stock equivalents from the diluted shares outstanding for the years ended December 31, 2018, 2017, and 2016 respectively, as they were anti-dilutive.

119

SL Green Realty Corp. and SL Green Operating Partnership, L.P.

Notes to Consolidated Financial Statements (cont.)

December 31, 2018

13. Partners' Capital of the Operating Partnership

The Company is the sole managing general partner of the Operating Partnership and at December 31, 2018 owned 83,683,847 general and limited partnership interests in the Operating Partnership and 9,200,000 Series I Preferred Units. Partnership interests in the Operating Partnership are denominated as “common units of limited partnership interest” (also referred to as “OP Units”) or “preferred units of limited partnership interest” (also referred to as “Preferred Units”). All references to OP Units and Preferred Units outstanding exclude such units held by the Company. A holder of an OP Unit may present such OP Unit to the Operating Partnership for redemption at any time (subject to restrictions agreed upon at the issuance of OP Units to particular holders that may restrict such right for a period of time, generally one year from issuance). Upon presentation of an OP Unit for redemption, the Operating Partnership must redeem such OP Unit in exchange for the cash equal to the then value of a share of common stock of the Company, except that the Company may, at its election, in lieu of cash redemption, acquire such OP Unit for one share of common stock. Because the number of shares of common stock outstanding at all times equals the number of OP Units that the Company owns, one share of common stock is generally the economic equivalent of one OP Unit, and the quarterly distribution that may be paid to the holder of an OP Unit equals the quarterly dividend that may be paid to the holder of a share of common stock. Each series of Preferred Units makes a distribution that is set in accordance with an amendment to the partnership agreement of the Operating Partnership. Preferred Units may also be convertible into OP Units at the election of the holder thereof or the Company, subject to the terms of such Preferred Units.

Net income (loss) allocated to the preferred unitholders and common unitholders reflects their pro rata share of net income (loss) and distributions.

Limited Partner Units

As of December 31, 2018, limited partners other than SL Green owned 4.70%, or 4,130,579 common units, of the Operating Partnership.

Preferred Units

Preferred units not owned by SL Green are further described in Note 11, “Noncontrolling Interests on the Company’s Consolidated Financial Statements - Preferred Units of Limited Partnership Interest in the Operating Partnership.”

Earnings per Unit

The Operating Partnership's earnings per unit for the years ended December 31, 2018, 2017, and 2016 respectively are computed as follows (in thousands):

	Year Ended December 31,
Numerator	2018			2017			2016
Basic Earnings:
Income attributable to SLGOP common unitholders	$	244,528		$	90,419		$	245,082
Less: distributed earnings allocated to participating securities	(552		)	$	(471	)	$	(634	)
Net Income attributable to SLGOP common unitholders (numerator for basic earnings per unit)	$	243,976		$	89,948		$	244,448
Add back: undistributed earnings allocated to participating securities	552			471			634
Income attributable to SLGOP common unitholders	$	244,528		$	90,419		$	245,082

	Year Ended December 31,
Denominator	2018	2017	2016
Basic units:
Weighted average common units outstanding	91,315	103,127	104,508
Effect of Dilutive Securities:
Stock-based compensation plans	215	276	373
Diluted weighted average common units outstanding	91,530	103,403	104,881

The Operating Partnership has excluded 1,138,647, 774,782, and 263,991 common unit equivalents from the diluted units outstanding for the years ended December 31, 2018, 2017, and 2016 respectively, as they were anti-dilutive.

120

SL Green Realty Corp. and SL Green Operating Partnership, L.P.

Notes to Consolidated Financial Statements (cont.)

December 31, 2018

14. Share-based Compensation

We have stock-based employee and director compensation plans. Our employees are compensated through the Operating Partnership. Under each plan, whenever the Company issues common or preferred stock, the Operating Partnership issues an equivalent number of units of limited partnership interest of a corresponding class to the Company.

Fourth Amended and Restated 2005 Stock Option and Incentive Plan

The Fourth Amended and Restated 2005 Stock Option and Incentive Plan, or the 2005 Plan, was approved by the Company's board of directors in April 2016 and its stockholders in June 2016 at the Company's annual meeting of stockholders. The 2005 Plan authorizes the issuance of stock options, stock appreciation rights, unrestricted and restricted stock, phantom shares, dividend equivalent rights, cash-based awards and other equity-based awards. Subject to adjustments upon certain corporate transactions or events, awards with respect to up to a maximum of 27,030,000 fungible units may be granted under the 2005 Plan. Currently, different types of awards count against the limit on the number of fungible units differently, with (1) full-value awards (i.e., those that deliver the full value of the award upon vesting, such as restricted stock) counting as 3.74 Fungible Units per share subject to such awards, (2) stock options, stock appreciation rights and other awards that do not deliver full value and expire five years from the date of grant counting as 0.73 fungible units per share subject to such awards, and (3) all other awards (e.g., ten-year stock options) counting as 1.0 fungible units per share subject to such awards. Awards granted under the 2005 Plan prior to the approval of the fourth amendment and restatement in June 2016 continue to count against the fungible unit limit based on the ratios that were in effect at the time such awards were granted, which may be different than the current ratios. As a result, depending on the types of awards issued, the 2005 Plan may result in the issuance of more or less than 27,030,000 shares. If a stock option or other award granted under the 2005 Plan expires or terminates, the common stock subject to any portion of the award that expires or terminates without having been exercised or paid, as the case may be, will again become available for the issuance of additional awards. Shares of our common stock distributed under the 2005 Plan may be treasury shares or authorized but unissued shares. Currently, unless the 2005 Plan has been previously terminated by the Company's board of directors, new awards may be granted under the 2005 Plan until June 2, 2026, which is the tenth anniversary of the date that the 2005 Plan was most recently approved by the Company's stockholders. As of December 31, 2018, 6.7 million fungible units were available for issuance under the 2005 Plan after reserving for shares underlying outstanding restricted stock units, phantom stock units granted pursuant to our Non-Employee Directors' Deferral Program and LTIP Units.

Options are granted under the plan with an exercise price at the fair market value of the Company's common stock on the date of grant and, subject to employment, generally expire five or ten years from the date of grant, are not transferable other than on death, and generally vest in one to five years commencing one year from the date of grant. We have also granted Class O LTIP Units, which are a class of LTIP Units in the Operating Partnership structured to provide economics similar to those of stock options. Class O LTIP Units, once vested, may be converted, at the election of the holder, into a number of common units of the Operating Partnership per Class O LTIP Unit determined by the increase in value of a share of the Company’s common stock at the time of conversion over a participation threshold, which equals the fair market value of a share of the Company’s common stock at the time of grant. Class O LTIP Units are entitled to distributions, subject to vesting, equal per unit to 10% of the per unit distributions paid with respect to the common units of the Operating Partnership.

The fair value of each stock option or LTIP Unit granted is estimated on the date of grant using the Black-Scholes option pricing model based on historical information with the following weighted average assumptions for grants during the years ended December 31, 2018, 2017, and 2016.

	2018		2017		2016
Dividend yield	2.85	%	2.51	%	2.37	%
Expected life	3.5 years		4.4 years		3.7 years
Risk-free interest rate	2.48	%	1.73	%	1.57	%
Expected stock price volatility	22.00	%	28.10	%	26.76	%

121

SL Green Realty Corp. and SL Green Operating Partnership, L.P.

Notes to Consolidated Financial Statements (cont.)

December 31, 2018

A summary of the status of the Company's stock options as of December 31, 2018, 2017, and 2016 and changes during the years ended December 31, 2018, 2017, and 2016 are as follows:

	2018					2017					2016
	Options Outstanding			Weighted Average Exercise Price		Options Outstanding			Weighted Average Exercise Price		Options Outstanding			Weighted Average Exercise Price
Balance at beginning of year	$	1,548,719		$	101.48	$	1,737,213		$	98.44	$	1,595,007		$	95.52
Granted	6,000			97.91		174,000			105.66		445,100			105.86
Exercised	(316,302		)	90.22		(292,193		)	81.07		(192,875		)	76.90
Lapsed or canceled	(101,400		)	113.22		(70,301		)	121.68		(110,019		)	123.86
Balance at end of year	$	1,137,017		$	135.54	$	1,548,719		$	101.48	$	1,737,213		$	98.44
Options exercisable at end of year	783,035			$	101.28	800,902			$	94.33	748,617			$	87.72
Weighted average fair value of options granted during the year	$	84,068				$	3,816,652				$	8,363,036

All options were granted with strike prices ranging from $20.67 to $137.18. The remaining weighted average contractual life of the options outstanding was 3.5 years and the remaining weighted average contractual life of the options exercisable was 3.7 years.

During the years ended December 31, 2018, 2017, and 2016, we recognized compensation expense for these options of $5.4 million, $7.8 million, and $8.9 million, respectively. As of December 31, 2018, there was $2.6 million of total unrecognized compensation cost related to unvested stock options, which is expected to be recognized over a weighted average period of 1.0 years.

Stock-based Compensation

Effective January 1, 1999, the Company implemented a stock-based compensation plan where shares are granted to certain employees, including our executives, and vesting will occur annually upon the completion of a service period or our meeting established financial performance criteria. Annual vesting occurs at rates ranging from 15% to 35% once performance criteria are reached.

A summary of the Company's restricted stock as of December 31, 2018, 2017, and 2016 and charges during the years ended December 31, 2018, 2017, and 2016 are as follows:

	2018			2017		2016
Balance at beginning of year	3,298,216			3,202,031		3,137,881
Granted	162,900			96,185		98,800
Canceled	(9,100		)	—		(34,650		)
Balance at end of year	3,452,016			3,298,216		3,202,031
Vested during the year	92,114			95,736		83,822
Compensation expense recorded	$	12,757,704		$	9,809,749	$	7,153,966
Weighted average fair value of restricted stock granted during the year	$	13,440,503		$	9,905,986	$	10,650,077

The fair value of restricted stock that vested during the years ended December 31, 2018, 2017, and 2016 was $9.8 million, $9.4 million and $7.6 million, respectively. As of December 31, 2018, there was $22.7 million of total unrecognized compensation cost related to restricted stock, which is expected to be recognized over a weighted average period of 2.3 years.

For the years ended December 31, 2018, 2017, and 2016, $6.3 million, $7.2 million, and $6.0 million, respectively, was capitalized to assets associated with compensation expense related to our long-term compensation plans, restricted stock and stock options.

We granted LTIP Units, which include bonus, time-based and performance based awards, with a fair value of $22.0 million and $20.5 million during the years ended December 31, 2018 and 2017, respectively. The grant date fair value of the LTIP Unit awards was calculated in accordance with ASC 718. A third party consultant determined the fair value of the LTIP Units to have

122

SL Green Realty Corp. and SL Green Operating Partnership, L.P.

Notes to Consolidated Financial Statements (cont.)

December 31, 2018

a discount from our common stock price. The discount was calculated by considering the inherent uncertainty that the LTIP Units will reach parity with other common partnership units and the illiquidity due to transfer restrictions. As of December 31, 2018, there was $2.9 million of total unrecognized compensation expense related to the time-based and performance based LTIP Unit awards, which is expected to be recognized over a weighted average period of 1.3 years.

During the years ended December 31, 2018, 2017, and 2016, we recorded compensation expense related to bonus, time-based and performance based LTIP Unit awards of $24.4 million, $26.1 million, and $26.5 million, respectively.

2014 Outperformance Plan

In August 2014, the compensation committee of the Company's board of directors approved the general terms of the SL Green Realty Corp. 2014 Outperformance Plan, or the 2014 Outperformance Plan. Participants in the 2014 Outperformance Plan could earn, in the aggregate, up to 610,000 LTIP Units in our Operating Partnership based on our total return to stockholders for the three-year period beginning September 1, 2014. Under the 2014 Outperformance Plan, two-thirds of the LTIP Units were subject to performance based vesting based on the Company’s absolute total return to stockholders and one-third of the LTIP Units were subject to performance based vesting based on relative total return to stockholders compared to the constituents of the MSCI REIT Index. LTIP Units earned under the 2014 Outperformance Plan were to be subject to continued vesting requirements, with 50% of any awards earned vesting on August 31, 2017 and the remaining 50% vesting on August 31, 2018, subject to continued employment with us through such dates. Participants were not entitled to distributions with respect to LTIP Units granted under the 2014 Outperformance Plan unless and until they are earned. If LTIP Units were earned, each participant would have been entitled to the distributions that would have been paid had the number of earned LTIP Units been issued at the beginning of the performance period, with such distributions being paid in the form of cash or additional LTIP Units. Thereafter, distributions were to be paid currently with respect to all earned LTIP Units, whether vested or unvested.

Based on our performance, none of the LTIP Units granted under the 2014 Outperformance Plan were earned pursuant to the terms of the 2014 Outperformance Plan, and all units issued were forfeited in 2017.

The cost of the 2014 Outperformance Plan ($27.9 million subject to forfeitures), based on the portion of the 2014 Outperformance Plan granted prior to termination, was amortized into earnings through December 31, 2017. We recorded zero compensation expense during the year ended December 31, 2018, and compensation expense of $13.6 million and $8.4 million during the years ended December 31, 2017 and 2016, respectively, related to the 2014 Outperformance Plan.

Deferred Compensation Plan for Directors

Under our Non-Employee Director's Deferral Program, which commenced July 2004, the Company's non-employee directors may elect to defer up to 100% of their annual retainer fee, chairman fees, meeting fees and annual stock grant. Unless otherwise elected by a participant, fees deferred under the program shall be credited in the form of phantom stock units. The program provides that a director's phantom stock units generally will be settled in an equal number of shares of common stock upon the earlier of (i) the January 1 coincident with or the next following such director's termination of service from the Board of Directors or (ii) a change in control by us, as defined by the program. Phantom stock units are credited to each non-employee director quarterly using the closing price of our common stock on the first business day of the respective quarter. Each participating non-employee director is also credited with dividend equivalents or phantom stock units based on the dividend rate for each quarter, which are either paid in cash currently or credited to the director’s account as additional phantom stock units.

During the year ended December 31, 2018, 13,638 phantom stock units were earned and 9,459 shares of common stock were issued to our board of directors. We recorded compensation expense of $2.4 million during the year ended December 31, 2018 related to the Deferred Compensation Plan. As of December 31, 2018, there were 113,492 phantom stock units outstanding pursuant to our Non-Employee Director's Deferral Program.

Employee Stock Purchase Plan

In 2007, the Company's board of directors adopted the 2008 Employee Stock Purchase Plan, or ESPP, to encourage our employees to make our business more successful by providing equity-based incentives to eligible employees. The ESPP is intended to qualify as an "employee stock purchase plan" under Section 423 of the Code, and has been adopted by the board to enable our eligible employees to purchase the Company's shares of common stock through payroll deductions. The ESPP became effective on January 1, 2008 with a maximum of 500,000 shares of the common stock available for issuance, subject to adjustment upon a merger, reorganization, stock split or other similar corporate change. The Company filed a registration statement on Form S-8 with the SEC with respect to the ESPP. The common stock is offered for purchase through a series of successive offering periods. Each offering period will be three months in duration and will begin on the first day of each calendar quarter, with the first offering period having commenced on January 1, 2008. The ESPP provides for eligible employees to purchase the common stock at a

123

SL Green Realty Corp. and SL Green Operating Partnership, L.P.

Notes to Consolidated Financial Statements (cont.)

December 31, 2018

purchase price equal to 85% of the lesser of (1) the market value of the common stock on the first day of the offering period or (2) the market value of the common stock on the last day of the offering period. The ESPP was approved by our stockholders at our 2008 annual meeting of stockholders. As of December 31, 2018, 116,368 shares of our common stock had been issued under the ESPP.

15. Accumulated Other Comprehensive Income

The following tables set forth the changes in accumulated other comprehensive income (loss) by component as of December 31, 2018, 2017 and 2016 (in thousands):

	Net unrealized gain on derivative instruments (1)			SL Green’s share of joint venture net unrealized gain on derivative instruments (2)			Net unrealized gain on marketable securities			Total
Balance at December 31, 2015	$	(10,160	)	$	(592	)	$	2,003		$	(8,749	)
Other comprehensive income before reclassifications	13,534			1,160			3,517			18,211
Amounts reclassified from accumulated other comprehensive income	9,222			3,453			—			12,675
Balance at December 31, 2016	12,596			4,021			5,520			22,137
Other comprehensive (loss) income before reclassifications	(1,618		)	233			(1,348		)	(2,733		)
Amounts reclassified from accumulated other comprehensive income	1,564			766			(3,130		)	(800		)
Balance at December 31, 2017	12,542			5,020			1,042			18,604
Other comprehensive (loss) income before reclassifications	(2,252		)	(103		)	51			(2,304		)
Amounts reclassified from accumulated other comprehensive income	(574		)	(618		)	—			(1,192		)
Balance at December 31, 2018	$	9,716		$	4,299		$	1,093		$	15,108

(1) Amount reclassified from accumulated other comprehensive income (loss) is included in interest expense in the respective consolidated statements of operations. As of December 31, 2018 and 2017, the deferred net losses from these terminated hedges, which is included in accumulated other comprehensive loss relating to net unrealized loss on derivative instrument, was $1.3 million and $3.2 million, respectively.

(2) Amount reclassified from accumulated other comprehensive income (loss) is included in equity in net income from unconsolidated joint ventures in the respective consolidated statements of operations.

16. Fair Value Measurements

We are required to disclose fair value information with regard to our financial instruments, whether or not recognized in the consolidated balance sheets, for which it is practical to estimate fair value. The FASB guidance defines fair value as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants on the measurement date. We measure and/or disclose the estimated fair value of financial assets and liabilities based on a hierarchy that distinguishes between market participant assumptions based on market data obtained from sources independent of the reporting entity and the reporting entity’s own assumptions about market participant assumptions. This hierarchy consists of three broad levels: Level 1 - quoted prices (unadjusted) in active markets for identical assets or liabilities that the reporting entity can access at the measurement date; Level 2 - inputs other than quoted prices included within Level 1, that are observable for the asset or liability, either directly or indirectly; and Level 3 - unobservable inputs for the asset or liability that are used when little or no market data is available. We follow this hierarchy for our assets and liabilities measured at fair value on a recurring and nonrecurring basis. In instances in which the determination of the fair value measurement is based on inputs from different levels of the fair value hierarchy, the level in the fair value hierarchy within which the entire fair value measurement falls is based on the lowest level of input that is significant to the fair value measurement in its entirety. Our assessment of the significance of the particular input to the fair value measurement in its entirety requires judgment and considers factors specific to the asset or liability.

The following tables set forth the assets and liabilities that we measure at fair value on a recurring and non-recurring basis by their levels in the fair value hierarchy at December 31, 2018 and 2017 (in thousands):

124

SL Green Realty Corp. and SL Green Operating Partnership, L.P.

Notes to Consolidated Financial Statements (cont.)

December 31, 2018

	December 31, 2018
	Total		Level 1		Level 2		Level 3
Assets:
Marketable securities	$	28,638	$	—	$	28,638	$	—
Interest rate cap and swap agreements (included in other assets)	$	18,676	$	—	$	18,676	$	—
Liabilities:
Interest rate cap and swap agreements (included in other liabilities)	$	7,663	$	—	$	7,663	$	—

	December 31, 2017
	Total		Level 1		Level 2		Level 3
Assets:
Marketable securities	$	28,579	$	—	$	28,579	$	—
Interest rate cap and swap agreements (included in other assets)	$	16,692	$	—	$	16,692	$	—

We determine impairment in real estate investments and debt and preferred equity investments, including intangibles primarily utilizing cash flow projections that apply, among other things, estimated revenue and expense growth rates, discount rates and capitalization rates, as well as sales comparison approach, which utilizes comparable sales, listings and sales contracts. All of which are classified as Level 3 inputs.

In December 2018, the Company determined that it was more likely than not that its suburban properties would be sold or otherwise disposed of significantly before the end of their previously estimated useful life. The Company tested the recoverability of the assets and, as a result of the carrying amount of the assets not being deemed recoverable and exceeding their fair value as measured on a asset by asset basis, recorded a $221.9 million impairment loss. These charges are included in depreciable real estate reserves and impairment in the consolidated statement of operations. The fair value of the assets were determined primarily utilizing cash flow projections that apply, among other things, estimated revenue and expense growth rates, discount rates and capitalization rates, as well as sales comparison approach, which utilizes comparable sales, listings and sales contracts. All of which are classified as Level 3 inputs.

In May 2018, the Company was the successful bidder at the foreclosure of 2 Herald Square, at which time the Company's $250.5 million outstanding principal balance and $7.7 million accrued interest balance receivables were credited to our equity investment in the property. We recorded the assets acquired and liabilities assumed at fair value. This resulted in the recognition of a fair value adjustment of $8.1 million, which is reflected on the Company's consolidated statement of operations within purchase price and other fair value adjustments. This fair value was determined by utilizing our successful bid at the foreclosure of the asset, the agreement to sell a partial interest in the property, and cash flow projections that apply, among other things, estimated revenue and expense growth rates, discount rates and capitalization rates, as well as a sales comparison approach, which utilizes comparable sales, listings and sales contracts, all of which are classified as Level 3 inputs.

In January 2018, the partnership agreement for our investment in 919 Third Avenue was modified resulting in the Company no longer having a controlling interest in this investment. As a result the investment was deconsolidated as of January 1, 2018. The Company recorded its non-controlling interest at fair value resulting in a $49.3 million fair value adjustment in the consolidated statement of operations. This fair value was determined using a third party valuation which primarily utilized cash flow projections that apply, among other things, estimated revenue and expense growth rates, discount rates and capitalization rates, as well as sales comparison approach, which utilizes comparable sales, listings and sales contracts. All of which are classified as Level 3 inputs.

Marketable securities classified as Level 1 are derived from quoted prices in active markets. The valuation technique used to measure the fair value of marketable securities classified as Level 2 were valued based on quoted market prices or model driven valuations using the significant inputs derived from or corroborated by observable market data. Marketable securities in an unrealized loss position are not considered to be other than temporarily impaired. We do not intend to sell these securities and it is not more likely than not that we will be required to sell the investments before recovery of their amortized cost bases.

The fair value of derivative instruments is based on current market data received from financial sources that trade such instruments and are based on prevailing market data and derived from third party proprietary models based on well-recognized financial principles and reasonable estimates about relevant future market conditions, which are classified as Level 2 inputs.

125

SL Green Realty Corp. and SL Green Operating Partnership, L.P.

Notes to Consolidated Financial Statements (cont.)

December 31, 2018

The financial assets and liabilities that are not measured at fair value on our consolidated balance sheets include cash and cash equivalents, restricted cash, accounts receivable, accounts payable and accrued expenses, debt and preferred equity investments, mortgages and other loans payable and other secured and unsecured debt. The carrying amount of cash and cash equivalents, restricted cash, accounts receivable, and accounts payable and accrued expenses reported in our consolidated balance sheets approximates fair value due to the short term nature of these instruments. The fair value of debt and preferred equity investments, which is classified as Level 3, is estimated by discounting the future cash flows using current interest rates at which similar loans with the same maturities would be made to borrowers with similar credit ratings. The fair value of borrowings, which is classified as Level 3, is estimated by discounting the contractual cash flows of each debt instrument to their present value using adjusted market interest rates, which is provided by a third-party specialist.

The following table provides the carrying value and fair value of these financial instruments as of December 31, 2018 and December 31, 2017 (in thousands):

	December 31, 2018				December 31, 2017
	Carrying Value (1)		Fair Value		Carrying Value (1)		Fair Value
Debt and preferred equity investments	$	2,099,393	(2)		$	2,114,041	(2)
Fixed rate debt	$	3,543,476	$	3,230,127	$	4,305,165	$	4,421,866
Variable rate debt	2,048,442		2,057,966		1,605,431		1,612,224
	$	5,591,918	$	5,288,093	$	5,910,596	$	6,034,090

(1) Amounts exclude net deferred financing costs.

(2) At December 31, 2018, debt and preferred equity investments had an estimated fair value ranging between $2.1 billion and $2.3 billion. At December 31, 2017, debt and preferred equity investments had an estimated fair value ranging between $2.1 billion and $2.3 billion.

Disclosure about fair value of financial instruments was based on pertinent information available to us as of December 31, 2018 and 2017. Although we are not aware of any factors that would significantly affect the reasonable fair value amounts, such amounts have not been comprehensively revalued for purposes of these financial statements since that date and current estimates of fair value may differ significantly from the amounts presented herein.

17. Financial Instruments: Derivatives and Hedging

In the normal course of business, we use a variety of commonly used derivative instruments, such as interest rate swaps, caps, collar and floors, to manage, or hedge interest rate risk. We hedge our exposure to variability in future cash flows for forecasted transactions in addition to anticipated future interest payments on existing debt. We recognize all derivatives on the balance sheet at fair value. Derivatives that are not hedges are adjusted to fair value through earnings. If a derivative is a hedge, depending on the nature of the hedge, changes in the fair value of the derivative will either be offset against the change in fair value of the hedge asset, liability, or firm commitment through earnings, or recognized in other comprehensive income until the hedged item is recognized in earnings. The ineffective portion of a derivative's change in fair value will be immediately recognized in earnings. Reported net income and equity may increase or decrease prospectively, depending on future levels of interest rates and other variables affecting the fair values of derivative instruments and hedged items, but will have no effect on cash flows. Currently, all of our designated derivative instruments are effective hedging instruments.

The following table summarizes the notional value at inception and fair value of our consolidated derivative financial instruments at December 31, 2018 based on Level 2 information. The notional value is an indication of the extent of our involvement in these instruments at that time, but does not represent exposure to credit, interest rate or market risks (amounts in thousands).

126

SL Green Realty Corp. and SL Green Operating Partnership, L.P.

Notes to Consolidated Financial Statements (cont.)

December 31, 2018

	Notional Value		Strike Rate		Effective Date	Expiration Date	Balance Sheet Location	Fair Value
Interest Rate Swap	$	200,000	1.131	%	July 2016	July 2023	Other Assets	$	11,148
Interest Rate Swap	100,000		1.161	%	July 2016	July 2023	Other Assets	5,447
Interest Rate Cap	137,500		4.000	%	September 2017	September 2019	Other Assets	—
Interest Rate Swap	100,000		1.928	%	December 2017	November 2020	Other Assets	1,045
Interest Rate Swap	100,000		1.934	%	December 2017	November 2020	Other Assets	1,035
Interest Rate Swap	150,000		2.696	%	January 2019	January 2024	Other Liabilities	(1,858		)
Interest Rate Swap	150,000		2.721	%	January 2019	January 2026	Other Liabilities	(2,450		)
Interest Rate Swap	200,000		2.740	%	January 2019	January 2026	Other Liabilities	(3,354		)
								$	11,013

During the years ended December 31, 2018, 2017, and 2016, we recorded a $0.2 million loss, a $0.5 million loss, and a $0.5 million gain, respectively, on the changes in the fair value, which is included in interest expense in the consolidated statements of operations.

The Company has agreements with each of its derivative counterparties that contain a provision where if the Company either defaults or is capable of being declared in default on any of its indebtedness, then the Company could also be declared in default on its derivative obligations. As of December 31, 2018, the fair value of derivatives in a net liability position, including accrued interest but excluding any adjustment for nonperformance risk related to these agreements, was $7.7 million. As of December 31, 2018, the Company has not posted any collateral related to these agreements and was not in breach of any agreement provisions. If the Company had breached any of these provisions, it could have been required to settle its obligations under the agreements at their aggregate termination value of $7.7 million at December 31, 2018.

Gains and losses on terminated hedges are included in accumulated other comprehensive income, and are recognized into earnings over the term of the related mortgage obligation. Over time, the realized and unrealized gains and losses held in accumulated other comprehensive income will be reclassified into earnings as an adjustment to interest expense in the same periods in which the hedged interest payments affect earnings. We estimate that $2.5 million of the current balance held in accumulated other comprehensive income will be reclassified into interest expense and $0.6 million of the portion related to our share of joint venture accumulated other comprehensive income will be reclassified into equity in net income from unconsolidated joint ventures within the next 12 months.

The following table presents the effect of our derivative financial instruments and our share of our joint ventures' derivative financial instruments that are designated and qualify as hedging instruments on the consolidated statements of operations for the years ended December 31, 2018, 2017, and 2016, respectively (in thousands):

	Amount of (Loss) Gain Recognized in Other Comprehensive Loss (Effective Portion)								Location of Loss Reclassified from Accumulated Other Comprehensive Loss into Income	Amount of Loss Reclassified from Accumulated Other Comprehensive Loss into Income (Effective Portion)						Location of (Loss) Gain Recognized in Income on Derivative	Amount of (Loss) Gain  Recognized into Income (Ineffective Portion)
	Year Ended December 31,									Year Ended December 31,							Year Ended December 31,
Derivative	2018			2017			2016			2018		2017		2016			2018			2017		2016
Interest Rate Swaps/Caps	$	(2,284	)	$	(2,282	)	$	14,616	Interest expense	$	609	$	1,821	$	9,521	Interest expense	$	(559	)	$	5	$	(28	)
Share of unconsolidated joint ventures' derivative instruments	(1,788		)	(200		)	2,012		Equity in net income from unconsolidated joint ventures	726		1,035		1,981		Equity in net income from unconsolidated joint ventures	(371		)	55		785
	$	(4,072	)	$	(2,482	)	$	16,628		$	1,335	$	2,856	$	11,502		$	(930	)	$	60	$	757

127

SL Green Realty Corp. and SL Green Operating Partnership, L.P.

Notes to Consolidated Financial Statements (cont.)

December 31, 2018

18. Rental Income

The Operating Partnership is the lessor and the sublessor to tenants under operating leases with expiration dates ranging from January 1, 2019 to 2064. The minimum rental amounts due under the leases are generally either subject to scheduled fixed increases or adjustments. The leases generally also require that the tenants reimburse us for increases in certain operating costs and real estate taxes above their base year costs. Approximate future minimum rents to be received over the next five years and thereafter for non-cancelable operating leases in effect at December 31, 2018 for the consolidated properties, including consolidated joint venture properties, and our share of unconsolidated joint venture properties are as follows (in thousands):

	Consolidated Properties		Unconsolidated Properties
2019	$	830,336	$	348,060
2020	765,610		375,228
2021	625,956		380,886
2022	562,250		348,222
2023	500,499		333,501
Thereafter	3,272,014		2,098,995
	$	6,556,665	$	3,884,892

19. Benefit Plans

The building employees are covered by multi-employer defined benefit pension plans and post-retirement health and welfare plans. We participate in the Building Service 32BJ, or Union, Pension Plan and Health Plan. The Pension Plan is a multi-employer, non-contributory defined benefit pension plan that was established under the terms of collective bargaining agreements between the Service Employees International Union, Local 32BJ, the Realty Advisory Board on Labor Relations, Inc. and certain other employees. This Pension Plan is administered by a joint board of trustees consisting of union trustees and employer trustees and operates under employer identification number 13-1879376. The Pension Plan year runs from July 1 to June 30. Employers contribute to the Pension Plan at a fixed rate on behalf of each covered employee. Separate actuarial information regarding such pension plans is not made available to the contributing employers by the union administrators or trustees, since the plans do not maintain separate records for each reporting unit. However, on September 28, 2016, September 28, 2017, and September 28, 2018, the actuary certified that for the plan years beginning July 1, 2016, July 1, 2017, and July 1, 2018, the Pension Plan was in critical status under the Pension Protection Act of 2006. The Pension Plan trustees adopted a rehabilitation plan consistent with this requirement. No surcharges have been paid to the Pension Plan as of December 31, 2018. For the Pension Plan years ended June 30, 2018, 2017, and 2016, the plan received contributions from employers totaling $272.3 million, $257.8 million, and $249.5 million. Our contributions to the Pension Plan represent less than 5.0% of total contributions to the plan.

The Health Plan was established under the terms of collective bargaining agreements between the Union, the Realty Advisory Board on Labor Relations, Inc. and certain other employers. The Health Plan provides health and other benefits to eligible participants employed in the building service industry who are covered under collective bargaining agreements, or other written agreements, with the Union. The Health Plan is administered by a Board of Trustees with equal representation by the employers and the Union and operates under employer identification number 13-2928869. The Health Plan receives contributions in accordance with collective bargaining agreements or participation agreements. Generally, these agreements provide that the employers contribute to the Health Plan at a fixed rate on behalf of each covered employee. For the Health Plan years ended, June 30, 2018, 2017, and 2016, the plan received contributions from employers totaling $1.4 billion, $1.3 billion and $1.2 billion, respectively. Our contributions to the Health Plan represent less than 5.0% of total contributions to the plan.

Contributions we made to the multi-employer plans for the years ended December 31, 2018, 2017 and 2016 are included in the table below (in thousands):

Benefit Plan	2018		2017		2016
Pension Plan	$	3,017	$	3,856	$	3,979
Health Plan	9,310		11,426		11,530
Other plans	1,106		1,463		1,583
Total plan contributions	$	13,433	$	16,745	$	17,092

401(K) Plan

In August 1997, we implemented a 401(K) Savings/Retirement Plan, or the 401(K) Plan, to cover eligible employees of ours, and any designated affiliate. The 401(K) Plan permits eligible employees to defer up to 15% of their annual compensation,

128

SL Green Realty Corp. and SL Green Operating Partnership, L.P.

Notes to Consolidated Financial Statements (cont.)

December 31, 2018

subject to certain limitations imposed by the Code. The employees' elective deferrals are immediately vested and non-forfeitable upon contribution to the 401(K) Plan. During 2003, we amended our 401(K) Plan to provide for discretionary matching contributions only. For 2018, a matching contribution equal to 100% of the first 4% of annual compensation was made. For 2017 and 2016, a matching contribution equal to 50% of the first 6% of annual compensation was made. For the year ended December 31, 2018, we made a matching contribution of $1,075,267. For the years ended December 31, 2017 and 2016, we made matching contributions of $1,011,830 and $906,875, respectively.

20. Commitments and Contingencies

Legal Proceedings

As of December 31, 2018, the Company and the Operating Partnership were not involved in any material litigation nor, to management's knowledge, was any material litigation threatened against us or our portfolio which if adversely determined could have a material adverse impact on us.

Environmental Matters

Our management believes that the properties are in compliance in all material respects with applicable Federal, state and local ordinances and regulations regarding environmental issues. Management is not aware of any environmental liability that it believes would have a materially adverse impact on our financial position, results of operations or cash flows. Management is unaware of any instances in which it would incur significant environmental cost if any of our properties were sold.

Employment Agreements

We have entered into employment agreements with certain executives, which expire between February 2020 and January 2022. The minimum cash-based compensation, including base salary and guaranteed bonus payments, associated with these employment agreements total $3.3 million for 2019.

Insurance

We maintain “all-risk” property and rental value coverage (including coverage regarding the perils of flood, earthquake and terrorism, excluding nuclear, biological, chemical, and radiological terrorism ("NBCR")), within three property insurance programs and liability insurance. Separate property and liability coverage may be purchased on a stand-alone basis for certain assets, such as the development of One Vanderbilt. Additionally, one of our captive insurance companies, Belmont Insurance Company, or Belmont, provides coverage for NBCR terrorist acts above a specified trigger. Belmont's retention is reinsured by our other captive insurance company, Ticonderoga Insurance Company ("Ticonderoga"). If Belmont or Ticonderoga are required to pay a claim under our insurance policies, we would ultimately record the loss to the extent of required payments. However, there is no assurance that in the future we will be able to procure coverage at a reasonable cost. Further, if we experience losses that are uninsured or that exceed policy limits, we could lose the capital invested in the damaged properties as well as the anticipated future cash flows from those properties. Additionally, our debt instruments contain customary covenants requiring us to maintain insurance and we could default under debt our instruments if the cost and/or availability of certain types of insurance make it impractical or impossible to comply with such covenants relating to insurance. Belmont and Ticonderoga provide coverage solely on properties owned by the Company or its affiliates.

Furthermore, with respect to certain of our properties, including properties held by joint ventures, or subject to triple net leases, insurance coverage is obtained by a third-party and we do not control the coverage. While we may have agreements with such third parties to maintain adequate coverage and we monitor these policies, such coverage ultimately may not be maintained or adequately cover our risk of loss.

Belmont had loss reserves of $4.0 million and $5.5 million as of December 31, 2018 and 2017, respectively. Ticonderoga had no loss reserves as of December 31, 2018.

Capital and Ground Leases Arrangements

In 2015, we entered into a ground lease for the land and building located at 30 East 40th Street with a lease term ending in August 2114. Based on our evaluation of the arrangement under ASC 840, land was estimated to be approximately 63.6% of the fair market value of the property. The portion attributable to land was classified as operating lease with an expiration date of 2114 ($76.0 million total over the lease term attributed to ground rent) and the remainder as a capital lease in the amount of $20.0 million. The ground rent will reset in 2035.

The property located at 420 Lexington Avenue operates under a ground lease ($10.9 million of ground rent annually through December 2019, $11.2 million of ground rent annually through December 2029, and $12.3 million annually afterwards, subject

129

SL Green Realty Corp. and SL Green Operating Partnership, L.P.

Notes to Consolidated Financial Statements (cont.)

December 31, 2018

to a one-time adjustment based on 6% of the fair value of the land) with an expiration date of 2050 and two options to renew for an additional 30 years.

The property located at 1080 Amsterdam Avenue operates under a ground and capital lease with an expiration date of 2111 ($41.6 million total over the lease term attributed to ground rent). Land was estimated to be 40.0% of the fair market value of the property, which was classified as an operating lease. The remainder was classified as a capital lease. The ground rent will reset in 2038.

The property located at 711 Third Avenue operates under an operating sub-lease with an expiration date of 2033 and five options to renew for an additional 10 years each. The ground rent was reset in July 2011. Following the reset, we were responsible for ground rent payments of $5.25 million annually through July 2016 and then $5.5 million annually thereafter on the 50% portion of the fee that we do not own. The ground rent will reset in July 2021 to the greater of $5.5 million or 7.75% of the fair value of the land.

The property located at 461 Fifth Avenue operates under a ground lease ($2.1 million of ground rent annually) with an expiration date of 2027 and two options to renew for an additional 21 years each, followed by a third option for 15 years. We also have an option to purchase the fee position for a fixed price on a specific date.

The property located at 625 Madison Avenue operates under a ground lease ($4.6 million of ground rent annually) with an expiration date of 2022 and two options to renew for an additional 32 years.

The property located at 1185 Avenue of the Americas operates under a ground lease ($6.9 million of ground rent annually) with an expiration date of 2043.

The property located at 1055 Washington Boulevard operates under a ground lease ($0.6 million of ground rent annually) with an expiration date of 2090.

The following is a schedule of future minimum lease payments under capital leases and non-cancellable operating leases with initial terms in excess of one year as of December 31, 2018 (in thousands):

	Capital lease			Non-cancellable operating leases (1)
2019	$	2,411		$	31,066
2020	2,620			31,436
2021	2,794			31,628
2022	2,794			29,472
2023	2,794			27,166
Thereafter	817,100			676,090
Total minimum lease payments	$	830,513		$	826,858
Amount representing interest	(786,897		)
Capital lease obligations	$	43,616

(1) As of December 31, 2018, the total minimum sublease rentals to be received in the future under non-cancellable subleases is $1.7 billion.

21. Segment Information

The Company has two reportable segments, real estate and debt and preferred equity investments. We evaluate real estate performance and allocate resources based on earnings contributions.

The primary sources of revenue are generated from tenant rents and escalations and reimbursement revenue. Real estate property operating expenses consist primarily of security, maintenance, utility costs, insurance, real estate taxes and ground rent expense (at certain applicable properties). See Note 5, "Debt and Preferred Equity Investments," for additional details on our debt and preferred equity investments.

130

SL Green Realty Corp. and SL Green Operating Partnership, L.P.

Notes to Consolidated Financial Statements (cont.)

December 31, 2018

Selected consolidated results of operations for the years ended December 31, 2018, 2017, and 2016, and selected asset information as of December 31, 2018 and 2017, regarding our operating segments are as follows (in thousands):

	Real Estate Segment			Debt and Preferred Equity Segment		Total Company
Total revenues
Years ended:
December 31, 2018	$	1,025,900		$	201,492	$	1,227,392
December 31, 2017	1,317,602			193,871		1,511,473
December 31, 2016	1,650,973			213,008		1,863,981
Net Income
Years ended:
December 31, 2018	$	129,253		$	141,603	$	270,856
December 31, 2017	(69,294		)	170,363		101,069
December 31, 2016	74,655			204,256		278,911
Total assets
As of:
December 31, 2018	$	10,481,594		$	2,269,764	$	12,751,358
December 31, 2017	11,598,438			2,384,466		13,982,904

Interest costs for the debt and preferred equity segment include actual costs incurred for borrowings on the 2016 MRA and 2017 MRA. Interest is imputed on the investments that do not collateralize the 2016 MRA or 2017 MRA using our weighted average corporate borrowing cost. We also allocate loan loss reserves, net of recoveries, and transaction related costs to the debt and preferred equity segment. We do not allocate marketing, general and administrative expenses to the debt and preferred equity segment since the use of personnel and resources is dependent on transaction volume between the two segments and varies period over period. In addition, we base performance on the individual segments prior to allocating marketing, general and administrative expenses. For the years ended, December 31, 2018, 2017, and 2016 marketing, general and administrative expenses totaled $92.6 million, $100.5 million, and $99.8 million respectively. All other expenses, except interest, relate entirely to the real estate assets.

There were no transactions between the above two segments.

131

SL Green Realty Corp. and SL Green Operating Partnership, L.P.

Notes to Consolidated Financial Statements (cont.)

December 31, 2018

22. Quarterly Financial Data of the Company (unaudited)

Summarized quarterly financial data for the years ended December 31, 2018 and 2017 was as follows (in thousands, except for per share amounts):

2018 Quarter Ended	December 31			September 30			June 30			March 31
Total revenues	$	317,036		$	307,545		$	301,116		$	301,695
Total expenses	(267,678		)	(265,553		)	(258,303		)	(258,282		)
Equity in net income from unconsolidated joint ventures	(2,398		)	971			4,702			4,036
Equity in net gain (loss) on sale of interest in unconsolidated joint venture/real estate	167,445			70,937			72,025			(6,440		)
Gain (loss) on sale of real estate, net	(36,984		)	(2,504		)	(14,790		)	23,521
Purchase price and other fair value adjustments	—			(3,057		)	11,149			49,293
Depreciable real estate reserves and impairment	(220,852		)	(6,691		)	—			—
Loss on early extinguishment of debt	(14,889		)	(2,194		)	—			—
Noncontrolling interests and preferred unit distributions	838			(7,507		)	(8,606		)	(8,319		)
Net income attributable to SL Green	(57,482		)	91,947			107,293			105,504
Perpetual preferred stock dividends	(3,737		)	(3,738		)	(3,737		)	(3,738		)
Net (loss) income attributable to SL Green common stockholders	$	(61,219	)	$	88,209		$	103,556		$	101,766
Net (loss) income attributable to common stockholders per common share—basic	$	(0.73	)	$	1.03		$	1.19		$	1.12
Net (loss) income attributable to common stockholders per common share—diluted	$	(0.73	)	$	1.03		$	1.19		$	1.12

2017 Quarter Ended	December 31			September 30			June 30			March 31
Total revenues	$	361,342		$	374,600		$	398,150		$	377,381
Total expenses	(314,108		)	(333,913		)	(365,749		)	(332,675		)
Equity in net income from unconsolidated joint ventures	7,788			4,078			3,412			6,614
Equity in net gain on sale of interest in unconsolidated joint venture/real estate	—			1,030			13,089			2,047
Gain (loss) on sale of real estate, net	76,497			—			(3,823		)	567
Depreciable real estate reserves and impairment	(93,184		)	—			(29,064		)	(56,272		)
Gain on the sale of investment in marketable securities	—			—			—			3,262
Noncontrolling interests and preferred unit distributions	(6,616		)	(3,188		)	(4,056		)	14,165
Net income attributable to SL Green	31,719			42,607			11,959			15,089
Perpetual preferred stock dividends	(3,737		)	(3,738		)	(3,737		)	(3,738		)
Net income attributable to SL Green common stockholders	$	27,982		$	38,869		$	8,222		$	11,351
Net income attributable to common stockholders per common share—basic	$	0.29		$	0.40		$	0.08		$	0.11
Net income attributable to common stockholders per common share—diluted	$	0.29		$	0.40		$	0.08		$	0.11

132

SL Green Realty Corp. and SL Green Operating Partnership, L.P.

Notes to Consolidated Financial Statements (cont.)

December 31, 2018

23. Quarterly Financial Data of the Operating Partnership (unaudited)

Summarized quarterly financial data for the years ended December 31, 2018 and 2017 was as follows (in thousands, except for per share amounts):

2018 Quarter Ended	December 31			September 30			June 30			March 31
Total revenues	$	317,036		$	307,545		$	301,116		$	301,695
Total expenses	(267,678		)	(265,553		)	(258,303		)	(258,282		)
Equity in net (loss) income from unconsolidated joint ventures	(2,398		)	971			4,702			4,036
Equity in net gain (loss) on sale of interest in unconsolidated joint venture/real estate	167,445			70,937			72,025			(6,440		)
(Loss) gain on sale of real estate, net	(36,984		)	(2,504		)	(14,790		)	23,521
Purchase price and other fair value adjustments	—			(3,057		)	11,149			49,293
Depreciable real estate reserves and impairment	(220,852		)	(6,691		)	—			—
Loss on early extinguishment of debt	(14,889		)	(2,194		)	—			—
Noncontrolling interests and preferred unit distributions	(2,601		)	(2,710		)	(3,020		)	(3,047		)
Net income attributable to SLOP	(60,921		)	96,744			112,879			110,776
Perpetual preferred units distributions	(3,737		)	(3,738		)	(3,737		)	(3,738		)
Net (loss) income attributable to SLGOP common unitholders	$	(64,658	)	$	93,006		$	109,142		$	107,038
Net (loss) income attributable to common unitholders per common share—basic	$	(0.73	)	$	1.03		$	1.19		$	1.12
Net (loss) income attributable to common unitholders per common share—diluted	$	(0.73	)	$	1.03		$	1.19		$	1.12

2017 Quarter Ended	December 31			September 30			June 30			March 31
Total revenues	$	361,342		$	374,600		$	398,150		$	377,381
Total expenses	(314,108		)	(333,913		)	(365,749		)	(332,675		)
Equity in net income from unconsolidated joint ventures	7,788			4,078			3,412			6,614
Equity in net gain on sale of interest in unconsolidated joint venture/real estate	—			1,030			13,089			2,047
Gain (loss) on sale of real estate, net	76,497			—			(3,823		)	567
Depreciable real estate reserves and impairment	(93,184		)	—			(29,064		)	(56,272		)
Gain on the sale of investment in marketable securities	—			—			—			3,262
Noncontrolling interests and preferred unit distributions	(5,328		)	(1,376		)	(3,637		)	14,641
Net income attributable to SLOP	33,007			44,419			12,378			15,565
Perpetual preferred units distributions	(3,737		)	(3,738		)	(3,737		)	(3,738		)
Net income attributable to SLGOP common unitholders	$	29,270		$	40,681		$	8,641		$	11,827
Net income attributable to common unitholders per common share—basic	$	0.29		$	0.40		$	0.08		$	0.11
Net income attributable to common unitholders per common share—diluted	$	0.29		$	0.40		$	0.08		$	0.11

133

SL Green Realty Corp. and SL Green Operating Partnership, L.P.

Schedule II - Valuation and Qualifying Accounts

December 31, 2018

(in thousands)

Column A	Column B		Column C		Column D			Column E
Description	Balance at Beginning of Year		Additions Charged Against Operations		Uncollectible Accounts Written-off/Recovery (1)			Balance at End of Year
Year Ended December 31, 2018
Tenant and other receivables—allowance	$	18,637	$	3,726	$	(6,661	)	$	15,702
Deferred rent receivable—allowance	$	17,207	$	491	$	(2,241	)	$	15,457
Year Ended December 31, 2017
Tenant and other receivables—allowance	$	16,592	$	6,106	$	(4,061	)	$	18,637
Deferred rent receivable—allowance	$	25,203	$	2,321	$	(10,317	)	$	17,207
Year Ended December 31, 2016
Tenant receivables—allowance	$	17,618	$	10,630	$	(11,656	)	$	16,592
Deferred rent receivable—allowance	$	21,730	$	13,620	$	(10,147	)	$	25,203

(1) Includes the effect of properties that were sold and/or deconsolidated within the period.

134

SL Green Realty Corp. and SL Green Operating Partnership, L.P.

Schedule III - Real Estate and Accumulated Depreciation

December 31, 2018

(in thousands)

Column A	Column B		Column C Initial Cost				Column D Cost Capitalized Subsequent To Acquisition						Column E Gross Amount at Which Carried at Close of Period						Column F		Column G	Column H	Column I
Description	Encumbrances		Land		Building & Improvements		Land			Building & Improvements			Land		Building & Improvements		Total		Accumulated Depreciation		Date of Construction	Date Acquired	Life on  Which Depreciation is Computed
420 Lexington Ave(1)	$	300,000	$	—	$	107,832	$	—		$	225,667		$	—	$	333,499	$	333,499	$	133,978	1927	3/1998	Various
711 Third Avenue(1)	—		19,844		42,499		—			73,270			19,844		115,769		135,613		45,066		1955	5/1998	Various
555 W. 57th Street(1)	—		18,846		78,704		—			62,242			18,846		140,946		159,792		69,817		1971	1/1999	Various
220 East 42nd Street(1)	—		50,373		203,727		635			161,705			51,008		365,432		416,440		108,450		1929	2/2003	Various
461 Fifth Avenue(1)	—		—		62,695		—			25,581			—		88,276		88,276		29,680		1988	10/2003	Various
750 Third Avenue(1)	—		51,093		205,972		—			45,551			51,093		251,523		302,616		101,854		1958	7/2004	Various
625 Madison Avenue(1)	—		—		246,673		—			44,646			—		291,319		291,319		118,380		1956	10/2004	Various
485 Lexington Avenue(1)	450,000		77,517		326,825		765			125,806			78,282		452,631		530,913		183,003		1956	12/2004	Various
609 Fifth Avenue(1)	—		36,677		145,954		—			49,527			36,677		195,481		232,158		43,777		1925	6/2006	Various
810 Seventh Avenue(1)	—		114,077		476,386		—			74,433			114,077		550,819		664,896		176,354		1970	1/2007	Various
1185 Avenue of the Americas(1)	—		—		728,213		—			62,893			—		791,106		791,106		265,896		1969	1/2007	Various
1350 Avenue of the Americas(1)	—		91,038		380,744		(97		)	50,773			90,941		431,517		522,458		136,853		1966	1/2007	Various
100 Summit Lake Drive(2)	—		10,526		43,109		(3,337		)	(94		)	7,189		43,015		50,204		18,936		1988	1/2007	Various
200 Summit Lake Drive(2)	—		11,183		47,906		(5,321		)	(9,102		)	5,862		38,804		44,666		21,203		1990	1/2007	Various
500 Summit Lake Drive(2)	—		9,777		39,048		(3,601		)	(7,875		)	6,176		31,173		37,349		14,523		1986	1/2007	Various
360 Hamilton Avenue(2)	—		29,497		118,250		(2,625		)	8,005			26,872		126,255		153,127		43,901		2000	1/2007	Various
1-6 Landmark Square(3)	100,000		50,947		195,167		(23,095		)	(33,824		)	27,852		161,343		189,195		79,012		1973-1984	1/2007	Various
7 Landmark Square(3)	—		2,088		7,748		(367		)	669			1,721		8,417		10,138		1,539		2007	1/2007	Various
1010 Washington Boulevard(3)	—		7,747		30,423		(1,259		)	2,928			6,488		33,351		39,839		12,489		1988	1/2007	Various
1055 Washington Boulevard(3)	—		13,516		53,228		(5,130		)	(9,986		)	8,386		43,242		51,628		20,382		1987	6/2007	Various
1 Madison Avenue(1)	—		172,641		654,394		905			18,411			173,546		672,805		846,351		193,033		1960	8/2007	Various
100 Church Street(1)	213,208		32,494		79,996		2,500			103,936			34,994		183,932		218,926		53,269		1959	1/2010	Various
125 Park Avenue(1)	—		120,900		189,714		—			80,884			120,900		270,598		391,498		77,542		1923	10/2010	Various
Williamsburg(4)	—		3,677		14,708		2,523			(4,550		)	6,200		10,158		16,358		2,127		2010	12/2010	Various
110 East 42nd Street(1)	—		34,000		46,411		2,196			31,942			36,196		78,353		114,549		17,400		1921	5/2011	Various
400 East 58th Street(1)(5)	39,931		17,549		30,916		—			7,833			17,549		38,749		56,298		6,119		1929	1/2012	Various
752 Madison Avenue(1)	—		282,415		7,131		1,871			1,183			284,286		8,314		292,600		1,380		1996/2012	1/2012	Various
762 Madison Avenue(1)(5)	771		6,153		10,461		—			109			6,153		10,570		16,723		1,884		1910	1/2012	Various
19-21 East 65th Street(1)	—		—		7,389		—			1,100			—		8,489		8,489		1,228		1928-1940	1/2012	Various
304 Park Avenue(1)	—		54,189		75,619		300			15,024			54,489		90,643		145,132		19,315		1930	6/2012	Various
635 Sixth Avenue(1)	—		24,180		37,158		163			51,103			24,343		88,261		112,604		10,931		1902	9/2012	Various
641 Sixth Avenue(1)	—		45,668		67,316		308			9,760			45,976		77,076		123,052		15,891		1902	9/2012	Various
1080 Amsterdam(1)(6)	35,807		—		27,445		—			20,503			—		47,948		47,948		5,441		1932	10/2012	Various
315 West 33rd Street(1)	250,000		195,834		164,429		—			15,133			195,834		179,562		375,396		25,397		2000-2001	11/2013	Various
562 Fifth Avenue(1)	—		57,052		10,487		—			1,213			57,052		11,700		68,752		4,458		1909/1920/1921	11/2013	Various

135

SL Green Realty Corp. and SL Green Operating Partnership, L.P.

Schedule III - Real Estate and Accumulated Depreciation

December 31, 2018

(in thousands)

Column A	Column B		Column C Initial Cost				Column D Cost Capitalized Subsequent To Acquisition						Column E Gross Amount at Which Carried at Close of Period						Column F		Column G	Column H	Column I
Description	Encumbrances		Land		Building & Improvements		Land			Building & Improvements			Land		Building & Improvements		Total		Accumulated Depreciation		Date of Construction	Date Acquired	Life on  Which Depreciation is Computed
719 Seventh Avenue(1)(7)	50,000		41,850		—		(670		)	46,232			41,180		46,232		87,412		3,025		1927	7/2014	Various
115 Spring Street(1)	65,550		11,078		44,799		—			1,850			11,078		46,649		57,727		5,248		1900	7/2014	Various
1640 Flatbush Avenue(4)	—		6,226		501		—			503			6,226		1,004		7,230		50		1966	3/2015	Various
110 Greene Street(1)(5)	—		45,120		215,470		—			12,923			45,120		228,393		273,513		23,683		1910	7/2015	Various
185 Broadway(1)(8)	111,869		13,400		34,175		32,022			(6,310		)	45,422		27,865		73,287		419		1921	8/2015	Various
30 East 40th Street(1)(9)	—		4,650		20,000		2			6,654			4,652		26,654		31,306		2,017		1927	8/2015	Various
133 Greene Street(1)	15,523		3,446		27,542		—			—			3,446		27,542		30,988		119		1900	10/2018	Various
712 Madison Avenue(1)	28,000		7,207		47,397		—			—			7,207		47,397		54,604		—		1900/1980	12/2018	Various
Other(10)	—		1,738		16,225		(2		)	(1		)	1,736		16,224		17,960		4,068
Total	$	1,660,659	$	1,776,213	$	5,370,786	$	(1,314	)	$	1,368,250		$	1,774,899	$	6,739,036	$	8,513,935	$	2,099,137

(1) Property located in New York, New York.

(2) Property located in Westchester County, New York.

(3) Property located in Connecticut.

(4) Property located in Brooklyn, New York.

(5) We own a 90.0% interest in this property.

(6) We own a 92.5% interest in this property.

(7) We own a 75.0% interest in this property.

(8) Properties at 5-7 Dey Street, 183 Broadway, and 185 Broadway were demolished in preparation of the development site for the 185 Broadway project.

(9) We own a 60.0% interest in this property.

(10) Other includes tenant improvements of eEmerge, capitalized interest and corporate improvements.

136

SL Green Realty Corp. and SL Green Operating Partnership, L.P.

Schedule III - Real Estate and Accumulated Depreciation

December 31, 2018

(in thousands)

The changes in real estate for the years ended December 31, 2018, 2017 and 2016 are as follows (in thousands):

	2018			2017			2016
Balance at beginning of year	$	10,206,122		$	12,743,332		$	16,681,602
Property acquisitions	52,939			13,323			29,230
Improvements	267,726			342,014			426,060
Retirements/disposals/deconsolidation	(2,012,852		)	(2,892,547		)	(4,393,560		)
Balance at end of year	$	8,513,935		$	10,206,122		$	12,743,332

The aggregate cost of land, buildings and improvements, before depreciation, for Federal income tax purposes at December 31, 2018 was $9.9 billion (unaudited).

The changes in accumulated depreciation, exclusive of amounts relating to equipment, autos, and furniture and fixtures, for the years ended December 31, 2018, 2017 and 2016 are as follows (in thousands):

	2018			2017			2016
Balance at beginning of year	$	2,300,116		$	2,264,694		$	2,060,706
Depreciation for year	245,033			347,015			353,502
Retirements/disposals/deconsolidation	(446,012		)	(311,593		)	(149,514		)
Balance at end of year	$	2,099,137		$	2,300,116		$	2,264,694

137

ITEM 9. CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND FINANCIAL DISCLOSURE

None.

ITEM 9A.    CONTROLS AND PROCEDURES

SL GREEN REALTY CORP.

Evaluation of Disclosure Controls and Procedures

The Company maintains disclosure controls and procedures that are designed to ensure that information required to be disclosed in our Exchange Act reports is recorded, processed, summarized and reported within the time periods specified in the SEC's rules and forms, and that such information is accumulated and communicated to the Company's management, including the Company's Chief Executive Officer and Chief Financial Officer, as appropriate, to allow timely decisions regarding required disclosure based closely on the definition of "disclosure controls and procedures" in Rule 13a-15(e) of the Exchange Act. Notwithstanding the foregoing, a control system, no matter how well designed and operated, can provide only reasonable, not absolute, assurance that it will detect or uncover failures within the Company to disclose material information otherwise required to be set forth in our periodic reports. Also, the Company has investments in certain unconsolidated entities. As the Company does not control these entities, its disclosure controls and procedures with respect to such entities are necessarily substantially more limited than those the Company maintains with respect to its consolidated subsidiaries.

As of the end of the period covered by this report, the Company carried out an evaluation, under the supervision and with the participation of the Company's management, including our Chief Executive Officer and our Chief Financial Officer, of the effectiveness of the design and operation of our disclosure controls and procedures. Based upon that evaluation as of the end of the period covered by this report, the Company's Chief Executive Officer and Chief Financial Officer concluded that its disclosure controls and procedures were effective to give reasonable assurances to the timely collection, evaluation and disclosure of information relating to the Company that would potentially be subject to disclosure under the Exchange Act and the rules and regulations promulgated thereunder.

Management's Report on Internal Control over Financial Reporting

The Company is responsible for establishing and maintaining adequate internal control over financial reporting, as such term is defined in Exchange Act Rules 13a-15(f) and 15d-15(f). Under the supervision and with the participation of the Company's management, including our Chief Executive Officer and Chief Financial Officer, the Company conducted an evaluation of the effectiveness of our internal control over financial reporting as of December 31, 2018 based on the framework in Internal Control—Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (2013 Framework) (COSO). Based on that evaluation, the Company concluded that its internal control over financial reporting was effective as of December 31, 2018.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree or compliance with the policies or procedures may deteriorate.

The effectiveness of the Company's internal control over financial reporting as of December 31, 2018 has been audited by Ernst & Young LLP, an independent registered public accounting firm, as stated in their report which appears herein.

Changes in Internal Control over Financial Reporting

There have been no significant changes in the Company's internal control over financial reporting during the year ended December 31, 2018 that has materially affected, or is reasonably likely to materially affect, its internal control over financial reporting.

SL GREEN OPERATING PARTNERSHIP, L.P.

Evaluation of Disclosure Controls and Procedures

The Operating Partnership maintains disclosure controls and procedures that are designed to ensure that information required to be disclosed in the Operating Partnership's Exchange Act reports is recorded, processed, summarized and reported within the time periods specified in the SEC’s rules and forms, and that such information is accumulated and communicated to the Operating Partnership's management, including the Chief Executive Officer and Chief Financial Officer of the Operating Partnership's general partner, as appropriate, to allow timely decisions regarding required disclosure based closely on the definition of “disclosure controls and procedures” in Rule 13a-15(e) of the Exchange Act. Notwithstanding the foregoing, a control system, no matter how

138

well designed and operated, can provide only reasonable, not absolute, assurance that it will detect or uncover failures within the Operating Partnership to disclose material information otherwise required to be set forth in the Operating Partnership's periodic reports. Also, the Operating Partnership has investments in certain unconsolidated entities. As the Operating Partnership does not control these entities, the Operating Partnership's disclosure controls and procedures with respect to such entities are necessarily substantially more limited than those it maintains with respect to its consolidated subsidiaries.

As of the end of the period covered by this report, the Operating Partnership carried out an evaluation, under the supervision and with the participation of management, including the Chief Executive Officer and Chief Financial Officer of the Operating Partnership's general partner, of the effectiveness of the design and operation of the Operating Partnership's disclosure controls and procedures. Based upon that evaluation as of the end of the period covered by this report, the Chief Executive Officer and Chief Financial Officer of the Operating Partnership's general partner concluded that the Operating Partnership's disclosure controls and procedures were effective to give reasonable assurances to the timely collection, evaluation and disclosure of information relating to the Operating Partnership that would potentially be subject to disclosure under the Exchange Act and the rules and regulations promulgated thereunder.

Management’s Report on Internal Control over Financial Reporting

The Operating Partnership is responsible for establishing and maintaining adequate internal control over financial reporting, as such term is defined in Exchange Act Rules 13a-15 (f) and 15d-15 (f). Under the supervision and with the participation of our management, including the Chief Executive Officer and Chief Financial Officer of the Operating Partnership's general partner, the Operating Partnership conducted an evaluation of the effectiveness of its internal control over financial reporting as of December 31, 2018 based on the framework in Internal Control-Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (2013 Framework) (COSO). Based on that evaluation, the Operating Partnership concluded that its internal control over financial reporting was effective as of December 31, 2018.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree or compliance with the policies or procedures may deteriorate.

The effectiveness of the Operating Partnership's internal control over financial reporting as of December 31, 2018 has been audited by Ernst & Young LLP, an independent registered public accounting firm, as stated in their report which appears herein.

Changes in Internal Control over Financial Reporting

There have been no significant changes in the Operating Partnership's internal control over financial reporting during the year ended December 31, 2018 that has materially affected, or is reasonably likely to materially affect, its internal control over financial reporting.

139

Report of Independent Registered Public Accounting Firm

To the Shareholders and the Board of Directors of SL Green Realty Corp.

Opinion on Internal Control Over Financial Reporting

We have audited SL Green Realty Corp.'s internal control over financial reporting as of December 31, 2018, based on criteria established in Internal Control-Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (2013 framework) (the COSO criteria). In our opinion, SL Green Realty Corp. (the Company) maintained, in all material respects, effective internal control over financial reporting as of December 31, 2018, based on the COSO criteria.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States)(PCAOB), the 2018 consolidated financial statements of the Company and our report dated February 26, 2019 expressed an unqualified opinion thereon.

Basis for Opinion

The Company's management is responsible for maintaining effective internal control over financial reporting, and for its assessment of the effectiveness of internal control over financial reporting included in the accompanying Management's Report on Internal Control over Financial Reporting. Our responsibility is to express an opinion on the Company's internal control over financial reporting based on our audit. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audit in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether effective internal control over financial reporting was maintained in all material respects.

Our audit included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, testing and evaluating the design and operating effectiveness of internal control based on the assessed risk, and performing such other procedures as we considered necessary in the circumstances. We believe that our audit provides a reasonable basis for our opinion.

Definition and Limitations of Internal Control Over Financial Reporting

A company's internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company's internal control over financial reporting includes those policies and procedures that (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company's assets that could have a material effect on the financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

/s/ Ernst & Young LLP

New York, New York

February 26, 2019

140

Report of Independent Registered Public Accounting Firm

To the Partners of SL Green Operating Partnership, L.P.

Opinion on Internal Control Over Financial Reporting

We have audited SL Green Operating Partnership L.P.'s internal control over financial reporting as of December 31, 2018, based on criteria established in Internal Control-Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (2013 framework) (the COSO criteria). In our opinion, SL Green Operating Partnership, L.P. (the Operating Partnership) maintained, in all material respects, effective internal control over financial reporting as of December 31, 2018, based on the COSO criteria.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the 2018 consolidated financial statements of the Operating Partnership and our report dated February 26, 2019 expressed an unqualified opinion thereon.

Basis for Opinion

The Operating Partnership's management is responsible for maintaining effective internal control over financial reporting and for its assessment of the effectiveness of internal control over financial reporting included in the accompanying Management's Report on Internal Control over Financial Reporting. Our responsibility is to express an opinion on the Operating Partnership's internal control over financial reporting based on our audit. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Operating Partnership in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audit in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether effective internal control over financial reporting was maintained in all material respects.

Our audit included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, testing and evaluating the design and operating effectiveness of internal control based on the assessed risk, and performing such other procedures as we considered necessary in the circumstances. We believe that our audit provides a reasonable basis for our opinion.

Definition and Limitations of Internal Control Over Financial Reporting

A company's internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company's internal control over financial reporting includes those policies and procedures that (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company's assets that could have a material effect on the financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

/s/ Ernst & Young LLP

New York, New York

February 26, 2019

141

ITEM 9B.    OTHER INFORMATION

None.

142

PART III

ITEM 10.    DIRECTORS, EXECUTIVE OFFICERS AND CORPORATE GOVERNANCE

The information required by Item 10 will be set forth in our Definitive Proxy Statement for our 2019 Annual Meeting of Stockholders, to be filed pursuant to Regulation 14A under the Securities and Exchange Act of 1934, as amended, on or prior to April 30, 2019, or the 2019 Proxy Statement, and is incorporated herein by reference.

ITEM 11.    EXECUTIVE COMPENSATION

The information required by Item 11 will be set forth in the 2019 Proxy Statement and is incorporated herein by reference.

ITEM 12.    SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT AND RELATED STOCKHOLDER MATTERS

The information required by Item 12 will be set forth in the 2019 Proxy Statement and is incorporated herein by reference.

ITEM 13.    CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS, AND DIRECTOR INDEPENDENCE

The information required by Item 13 will be set forth under in the 2019 Proxy Statement and is incorporated herein by reference.

ITEM 14.    PRINCIPAL ACCOUNTING FEES AND SERVICES

The information regarding principal accounting fees and services and the audit committee's pre-approval policies and procedures required by this Item 14 will be set forth in the 2019 Proxy Statement and is incorporated herein by reference.

143

PART IV

ITEM 15. EXHIBITS, FINANCIAL STATEMENTS AND SCHEDULES

(a)(1) Consolidated Financial Statements

SL GREEN REALTY CORP.
Report of Independent Registered Public Accounting Firm	68
Consolidated Balance Sheets as of December 31, 2018 and 2017	69
Consolidated Statements of Operations for the years ended December 31, 2018, 2017 and 2016	71
Consolidated Statements of Comprehensive Income for the years ended December 31, 2018, 2017 and 2016	72
Consolidated Statements of Equity for the years ended December 31, 2018, 2017 and 2016	73
Consolidated Statements of Cash Flows for the years ended December 31, 2018, 2017 and 2016	75
SL GREEN OPERATING PARTNERSHIP, L.P.
Report of Independent Registered Public Accounting Firm	78
Consolidated Balance Sheets as of December 31, 2018 and 2017	79
Consolidated Statements of Operations for the years ended December 31, 2018, 2017 and 2016	81
Consolidated Statements of Comprehensive Income for the years ended December 31, 2018, 2017 and 2016	82
Consolidated Statements of Equity for the years ended December 31, 2018, 2017 and 2016	83
Consolidated Statements of Cash Flows for the years ended December 31, 2018, 2017 and 2016	84
Notes to Consolidated Financial Statements	87
(a)(2)    Financial Statement Schedules
Schedule II—Valuation and Qualifying Accounts for the years ended December 31, 2018, 2017 and 2016	134
Schedule III—Real Estate and Accumulated Depreciation as of December 31, 2018	135

Schedules other than those listed are omitted as they are not applicable or the required or equivalent information has been included in the financial statements or notes thereto.

(a)(3)    In reviewing the agreements included as exhibits to this Annual Report on Form 10-K, please remember they are included to provide you with information regarding their terms and are not intended to provide any other factual or disclosure information about us or the other parties to the agreements. The agreements contain representations and warranties by each of the parties to the applicable agreement. These representations and warranties have been made solely for the benefit of the other parties to the applicable agreement and:

• should not in all instances be treated as categorical statements of fact, but rather as a way of allocating the risk to one of the parties if those statements prove to be inaccurate;

• have been qualified by disclosures that were made to the other party in connection with the negotiation of the applicable agreement, which disclosures are not necessarily reflected in the agreement;

• may apply standards of materiality in a way that is different from what may be viewed as material to you or other investors; and

• were made only as of the date of the applicable agreement or such other date or dates as may be specified in the agreement and are subject to more recent developments.

Accordingly, these representations and warranties may not describe the actual state of affairs as of the date they were made or at any other time. Additional information about us may be found elsewhere in this Annual Report on Form 10-K and our other public filings, which are available without charge through the SEC's website at http://www.sec.gov.

144

INDEX TO EXHIBITS

3.1	Articles of Restatement, incorporated by reference to the Company's Form 10-Q, dated July 11, 2014, filed with the SEC on August 11, 2014.
3.2	Articles of Amendment to the Company’s Articles of Restatement, incorporated by reference to the Company’s Form 8-K, dated July 18, 2017, filed with the SEC on July 18, 2017.
3.3	Fifth Amended and Restated Bylaws of the Company, incorporated by reference to the Company's Form 8-K, dated December 21, 2018, filed with the SEC on December 28, 2018.
3.4	Articles Supplementary Electing that SL Green Realty Corp. be Subject to Maryland General Corporations Law Section 3-804(c), incorporated by reference to the Company's Form 8-K, dated September 16, 2009, filed with the SEC on September 16, 2009.
3.5	Articles Supplementary reclassifying 4,600,000 shares of 8.0% Series A Convertible Cumulative Preferred Stock, 1,300,000 shares of Series B Junior Participating Preferred Stock and 4,000,000 shares of 7.875% Series D Cumulative Redeemable Preferred Stock into authorized preferred stock without further designation, incorporated by reference to the Company's Form 8-K, dated August 9, 2012, filed with the SEC on August 10, 2012.
3.6	Articles Supplementary classifying and designating 9,200,000 shares of the Company's 6.50% Series I Cumulative Redeemable Preferred Stock, liquidation preference $25.00 per share, par value $0.01 per share, incorporated by reference to the Company's Form 8-K, dated August 9, 2012, filed with the SEC on August 10, 2012.
3.7	First Amended and Restated Agreement of Limited Partnership of the Operating Partnership, incorporated by reference to the Company's Form 8-K, dated October 23, 2002, filed with the SEC on October 23, 2002.
3.8	First Amendment to the First Amended and Restated Agreement of Limited Partnership of the Operating Partnership, dated May 14, 1998, incorporated by reference to the Company's Form 8-K, dated October 23, 2002, filed with the SEC on October 23, 2002.
3.9	Second Amendment to the First Amended and Restated Agreement of Limited Partnership of the Operating Partnership, incorporated by reference to the Company's Quarterly Report on Form 10-Q for the quarter ended June 30, 2002, filed with the SEC on July 31, 2002.
3.10	Third Amendment to the First Amended and Restated Agreement of Limited Partnership of the Operating Partnership, dated December 12, 2003, incorporated by reference to the Company's Annual Report on Form 10-K for the year ended December 31, 2003, filed with the SEC on March 15, 2004.
3.11	Amended and Restated Fourth Amendment to the First Amended and Restated Agreement of Limited Partnership of the Operating Partnership, dated as of July 15, 2004, incorporated by reference to the Company's Annual Report on Form 10-K for the year ended December 31, 2004, filed with the SEC on March 15, 2005.
3.12	Fifth Amendment to the First Amended and Restated Agreement of Limited Partnership of the Operating Partnership, dated as of March 15, 2006, incorporated by reference to the Company's Annual Report on Form 10-K for the year ended December 31, 2005, filed with the SEC on March 16, 2006.
3.13	Sixth Amendment to the First Amended and Restated Agreement of Limited Partnership of the Operating Partnership, dated as of June 30, 2006, incorporated by reference to the Company's Quarterly Report on Form 10-Q for the quarter ended June 30, 2006, filed with the SEC on August 10, 2006.
3.14	Seventh Amendment to the First Amended and Restated Agreement of Limited Partnership of the Operating Partnership, dated as of January 25, 2007, incorporated by reference to the Company's Form 8-K, dated January 24, 2007, filed with the SEC on January 30, 2007.
3.15	Eighth Amendment to the First Amended and Restated Agreement of Limited Partnership of the Operating Partnership, dated as of January 20, 2010, incorporated by reference to the Company's Form 8-K, dated January 20, 2010, filed with the SEC on January 20, 2010.
3.16	Ninth Amendment to the First Amended and Restated Agreement of Limited Partnership of the Operating Partnership, dated as of November 30, 2011, incorporated by reference to the Company's Form 8-K, dated December 5, 2011, filed with the SEC on December 5, 2011.
3.17	Tenth Amendment to the First Amended and Restated Agreement of Limited Partnership of the Operating Partnership, dated as of January 31, 2012, incorporated by reference to the Company's Form 8-K, dated January 31, 2012, filed with the SEC on February 2, 2012.
3.18	Eleventh Amendment to the First Amended and Restated Agreement of Limited Partnership of the Operating Partnership, dated March 6, 2012, incorporated by reference to the Company's Quarterly Report on Form 10-Q for the quarter ended March 31, 2012, filed with the SEC on May 10, 2012.
3.19	Twelfth Amendment to the First Amended and Restated Agreement of Limited Partnership of the Operating Partnership, dated as of August 10, 2012, incorporated by reference to the Company's Form 8-K, dated August 10, 2012, filed with the SEC on August 10, 2012.

145

3.20	Thirteenth Amendment to the First Amended and Restated Agreement of Limited Partnership of the Operating Partnership, dated as of April 2, 2014, incorporated by reference to the Company's Form 8-K, dated April 4, 2014, filed with the SEC on April 4, 2014.
3.21	Fourteenth Amendment to the First Amended and Restated Agreement of Limited Partnership of the Operating Partnership, dated as of July 1, 2014, incorporated by reference to the Company's Form 8-K, dated July 2, 2014, filed with the SEC on July 2, 2014.
3.22	Fifteenth Amendment to the First Amended and Restated Agreement of Limited Partnership of the Operating Partnership, dated as of July 1, 2014, incorporated by reference to the Company's Form 8-K, dated July 2, 2014, filed with the SEC on July 2, 2014.
3.23	Sixteenth Amendment to the First Amended and Restated Agreement of Limited Partnership of the Operating Partnership, dated as February 12, 2015, incorporated by reference to the Company's Form 8-K, dated February 12, 2015, filed with the SEC on February 13, 2015.
3.24	Seventeenth Amendment to the First Amended and Restated Agreement of Limited Partnership of the Operating Partnership, dated as of June 19, 2015, incorporated by reference to the Company's Form 8-K, dated June 22, 2015, filed with the SEC on June 22, 2015.
3.25	Nineteenth Amendment to the First Amended and Restated Agreement of Limited Partnership of the Operating Partnership, dated as of July 22, 2015, incorporated by reference to the Company's Form 8-K, dated July 24, 2015, filed with the SEC on July 24, 2015.
3.26	Twentieth Amendment to the First Amended and Restated Agreement of Limited Partnership of the Operating Partnership, dated as of July 22, 2015, incorporated by reference to the Company's Form 8-K, dated July 24, 2015, filed with the SEC on July 24, 2015.
3.27	Twenty-First Amendment to the First Amended and Restated Agreement of Limited Partnership of the Operating Partnership, dated as of August 20, 2015, incorporated by reference to the Company's Form 8-K, dated as of August 21, 2015, filed with the SEC on August 21, 2015.
3.28	Twenty-Second Amendment to the First Amended and Restated Agreement of Limited Partnership of the Operating Partnership, dated as of August 20, 2015, incorporated by reference to the Company's Form 8-K, dated as of August 21, 2015, filed with the SEC on August 21, 2015.
3.29	Twenty-Third Amendment to the First Amended and Restated Agreement of Limited Partnership of the Operating Partnership, dated as of March 28, 2016, incorporated by reference to the Company's Form 8-K, dated as of April 1, 2016, filed with the SEC on April 1, 2016.
3.30	Twenty-Fourth Amendment to the First Amended and Restated Agreement of Limited Partnership of the Operating Partnership, dated as of March 28, 2016, incorporated by reference to the Company's Form 8-K, dated as of April 1, 2016, filed with the SEC on April 1, 2016.
3.31	Twenty-Fifth Amendment to the First Amended and Restated Agreement of Limited Partnership of the Operating Partnership, dated as of June 17, 2016, incorporated by reference to the Company's Quarterly Report on Form 10-Q for the quarter ended September 30, 2016, filed with the SEC on November 9, 2016.
4.1	Specimen Common Stock Certificate, incorporated by reference to the Company's Registration Statement on Form S-11 (No. 333-29329), declared effective by the SEC on August 14, 1997.
4.2	Form of stock certificate evidencing the 6.50% Series I Cumulative Redeemable Preferred Stock of the Company, liquidation preference $25.00 per share, par value $0.01 per share, incorporated by reference to the Company's Form 8-K, dated August 9, 2012, filed with the SEC on August 10, 2012.
4.3	Indenture, dated as of March 16, 2010, among ROP, as Issuer, the Company and the Operating Partnership, as Co-Obligors, and The Bank of New York Mellon, as Trustee, incorporated by reference to the Company's Form 8-K, dated March 16, 2010, filed with the SEC on March 17, 2010.
4.4	Form of 7.75% Senior Note due 2020 of ROP, the Company and the Operating Partnership, incorporated by reference to the Company's Form 8-K, dated March 16, 2010, filed with the SEC on March 17, 2010.
4.5	First Supplemental Indenture, dated as of December 28, 2018, among SL Green Realty Corp., SL Green Operating Partnership, L.P., Reckson Operating Partnership, L.P. and The Bank of New York Mellon, as Trustee, to the Indenture, dated as of March 16, 2010, among SL Green Realty Corp., SL Green Operating Partnership, L.P., Reckson Operating Partnership, L.P. and The Bank of New York Mellon, as Trustee, incorporated by reference to the Company's Form 8-K, dated December 28, 2018, filed with the SEC on January 2, 2019.
4.6	Indenture, dated as of October 12, 2010, by and among the Operating Partnership, as Issuer, ROP, as Guarantor, the Company and The Bank of New York Mellon, as Trustee, incorporated by reference to the Company's Form 8-K, dated October 12, 2010, filed with the SEC on October 14, 2010.
4.7	Indenture, dated as of August 5, 2011, among the Company, the Operating Partnership and ROP, as Co-Obligors, and The Bank of New York Mellon, as Trustee, incorporated by reference to the Company's Form 8-K, dated August 5, 2011, filed with the SEC on August 5, 2011.
4.8	Second Supplemental Indenture, dated as of November 15, 2012, among the Company, the Operating Partnership and ROP, as Co-Obligors, and The Bank of New York Mellon, as Trustee, incorporated by reference to the Company's Form 8-K, dated November 9, 2012, filed with the SEC on November 15, 2012.

146

4.9	Form of 4.50% Senior Note due 2022 of the Company, the Operating Partnership and ROP, as Co-Obligors,incorporated by reference to the Company's Form 8-K, dated November 9, 2012, filed with the SEC on November 15, 2012.
4.10	Third Supplemental Indenture, dated as of December 28, 2018, among SL Green Realty Corp., SL Green Operating Partnership, L.P. and The Bank of New York Mellon, as Trustee, to the Indenture, dated as of August 5, 2011, among SL Green Realty Corp., SL Green Operating Partnership, L.P., Reckson Operating Partnership, L.P. and The Bank of New York Mellon, as Trustee, incorporated by reference to the Company's Form 8-K, dated December 28, 2018, filed with the SEC on January 2, 2019.
4.11	Junior Subordinated Indenture, dated as of June 30, 2005, between the Operating Partnership and JPMorgan Chase Bank, National Association, as Trustee, incorporated by reference to the Company's Quarterly Report on Form 10-Q for the quarter ended June 30, 2005, filed with the SEC on August 9, 2005.
4.12	Indenture, dated as of October 5, 2017, among the Company, the Operating Partnership, ROP and Wells Fargo Securities, LLC and J.P. Morgan Securities LLC, as representatives of the several underwriters, incorporated by reference to the Company’s Form 8-K, dated October 5, 2017, filed with the SEC on October 5, 2017.
4.13	First Supplemental Indenture, dated as of October 5, 2017, among the Operating Partnership, as Issuer, the Company and ROP, as Guarantors, and The Bank of New York Mellon, as Trustee, incorporated by reference to the Company’s Form 8-K, dated October 5, 2017, filed with the SEC on October 5, 2017.
4.14	Form of 3.250% Senior Note due 2022 of the Operating Partnership, incorporated by reference to the Company’s Form 8-K, dated October 5, 2017, filed with the SEC on October 5, 2017.
4.15	Second Supplemental Indenture, dated as of August 7, 2018, among SL Green Realty Corp., SL Green Operating Partnership, L.P. and Reckson Operating Partnership, L.P. and The Bank of New York Mellon, as Trustee, to the Indenture, dated as of October 5, 2017, between SL Green Operating Partnership, L.P. and The Bank of New York Mellon, as Trustee, incorporated by reference to the Company's Form 8-K, dated August 7, 2018, filed with the SEC on August 7, 2018.
4.16	Form of Floating Rate Note (included in the Second Supplemental Indenture incorporated by reference as Exhibit 4.15 of this Form 10-K).
10.1	Amended and Restated Agreement of Limited Partnership of ROP, dated December 6, 1995, incorporated by reference to the Company's Annual Report on Form 10-K for the year ended December 31, 2017, filed with the SEC on February 23, 2018.
10.2	Supplement to the Amended and Restated Agreement of Limited Partnership of ROP relating to the succession as a general partner of Wyoming Acquisition GP LLC, incorporated by reference to ROP's Annual Report on Form 10-K for the year ended December 31, 2007, filed with the SEC on March 31, 2008.
10.3	Form of Articles of Incorporation and Bylaws of SL Green Management Corp., incorporated by reference to the Company's Registration Statement on Form S-11 (No. 333-29329), declared effective by the SEC on August 14, 1997.
10.4	Form of Registration Rights Agreement between the Company and the persons named therein, incorporated by reference to the Company's Registration Statement on Form S-11 (No. 333-29329), declared effective by the SEC on August 14, 1997.
10.5	Amended and Restated Trust Agreement among the Operating Partnership, as depositor, JPMorgan Chase Bank, National Association, as property trustee, Chase Bank USA, National Association, as Delaware trustee, and the administrative trustees named therein, dated June 30, 2005, incorporated by reference to the Company's Quarterly Report on Form 10-Q for the quarter ended June 30, 2005, filed with the SEC on August 9, 2005.
10.6	SL Green Realty Corp. Fourth Amended and Restated 2005 Stock Option and Incentive Plan, incorporated by reference to Appendix A to the Company's definitive Proxy Statement on Schedule 14A filed on April 22, 2016
10.7	Amended and Restated Non-Employee Directors' Deferral Program, dated December 13, 2017, incorporated by reference to the Company's Annual Report on Form 10-K for the year ended December 31, 2017, filed with the SEC on February 23, 2018.
10.8	Amended and Restated Employment and Non-competition Agreement, dated December 24, 2010, between Stephen L. Green and the Company, incorporated by reference to the Company's Form 8-K, dated December 23, 2010, filed with the SEC on December 29, 2010.
10.9	Deferred Compensation Agreement, dated December 18, 2009, between the Company and Stephen L. Green, incorporated by reference to the Company's Form 8-K, dated December 18, 2009, filed with the SEC on December 24, 2009.
10.10	Deferred Compensation Agreement, dated December 24, 2010, between the Company and Stephen L. Green, incorporated by reference to the Company's Form 8-K, dated December 23, 2010, filed with the SEC on December 29, 2010.
10.11	Deferred Compensation Agreement (2013), dated as of September 12, 2013, by and between the Company and Marc Holliday, incorporated by reference to the Company’s Form 8-K, dated September 12, 2013, filed with the SEC on September 13, 2013.

147

10.12	Deferred Compensation Agreement, dated as of February 10, 2016, by and between SL Green Realty Corp. and Marc Holliday, incorporated by reference to the Company's Form 8-K, dated February 10, 2016, filed with the SEC on February 12, 2016.
10.13	Deferred Compensation Agreement (2014), dated as of November 8, 2013, between the Company and Andrew Mathias, incorporated by reference to the Company’s Form 8-K, dated November 8, 2013, filed with the SEC on November 8, 2013.
10.14	Amended and Restated Employment and Noncompetition Agreement, dated as of February 2, 2018, by and between the Company and Matthew DiLiberto, incorporated by reference to the Company’s Form 8-K, dated February 2, 2018, filed with the SEC on February 5, 2018.
10.15	Amended and Restated Employment and Noncompetition Agreement, dated as of April 30, 2018, by and between SL Green Realty Corp. and Marc Holliday, incorporated by reference to the Company's Form 8-K, dated April 27, 2018, filed with the SEC on May 3, 2018.
10.16	Letter Agreement, dated as of April 30, 2018, by and between SL Green Realty Corp. and Marc Holliday, incorporated by reference to the Company's Form 8-K, dated April 27, 2018, filed with the SEC on May 3, 2018.
10.17	Amended and Restated Employment and Noncompetition Agreement, dated as of December 21, 2018, by and between SL Green Realty Corp. and Andrew Mathias, incorporated by reference to the Company's Form 8-K, dated December 21, 2018, filed with the SEC on December 28, 2018.
10.18	Amended and Restated Employment and Noncompetition Agreement, dated as of December 21, 2018, by and between SL Green Realty Corp. and Andrew Levine, incorporated by reference to the Company's Form 8-K, dated December 21, 2018, filed with the SEC on December 28, 2018.
10.19	Chairman Emeritus Agreement, dated as of December 21, 2018, by and between SL Green Realty Corp. and Stephen L. Green, incorporated by reference to the Company's Form 8-K, dated December 21, 2018, filed with the SEC on December 28, 2018.
10.20	Second Amended and Restated Credit Agreement, dated as of November 21, 2017, by and among SL Green Realty Corp. and SL Green Operating Partnership, L.P., as Borrowers, each of the Lenders party thereto, Wells Fargo Bank, National Association, as Administrative Agent, Wells Fargo Securities, LLC, JPMorgan Chase Bank, N.A., Deutsche Bank Securities Inc. and U.S. Bank National Association, as joint lead arrangers and joint bookrunners for the Revolving Credit Facility and Term Loan A Facility, Merrill Lynch, Pierce, Fenner & Smith Incorporated and BMO Capital Markets Corp., as joint lead arrangers for the Revolving Credit Facility and Term Loan A Facility, JPMorgan Chase Bank, N.A., as syndication agent for the Revolving Credit Facility and Term Loan A Facility, Deutsche Bank Securities, Inc., U.S. Bank National Association, Bank of America, N.A., and Bank of Montreal, as documentation agents for the Revolving Credit Facility and Term Loan A Facility, Wells Fargo Securities, LLC and U.S. Bank National Association, as joint lead arrangers and joint bookrunners for the Term Loan B Facility, U.S. Bank National Association, as syndication agent for the Term Loan B Facility, and the other lenders and agents a party thereto, incorporated by reference to the Company's Form 8-K, dated November 27, 2017, filed with the SEC on November 27, 2017.
21.1	Subsidiaries of SL Green Realty Corp., filed herewith.
21.2	Subsidiaries of SL Green Operating Partnership L.P., filed herewith.
23.1	Consent of Ernst & Young LLP for SL Green Realty Corp., filed herewith.
23.2	Consent of Ernst & Young LLP for SL Green Operating Partnership, L.P., filed herewith.
24.1	Power of Attorney for SL Green Realty Corp., included on the signature page of this Form 10-K.
24.2	Power of Attorney for SL Green Operating Partnership, L.P., included on the signature page of this Form 10-K.
31.1	Certification by the Chief Executive Officer of the Company pursuant to Section 302 of the Sarbanes-Oxley Act of 2002, filed herewith.
31.2	Certification by the Chief Financial Officer of the Company pursuant to Section 302 of the Sarbanes-Oxley Act of 2002, filed herewith.
31.3	Certification by the Chief Executive Officer of the Company, the sole general partner of the Operating Partnership pursuant to Section 302 of the Sarbanes-Oxley Act of 2002, filed herewith.
31.4	Certification by the Chief Financial Officer of the Company, the sole general partner of the Operating Partnership pursuant to Section 302 of the Sarbanes-Oxley Act of 2002, filed herewith.
32.1	Certification by the Chief Executive Officer pursuant to 18 U.S.C. section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, filed herewith.
32.2	Certification by the Chief Financial Officer pursuant to 18 U.S.C. section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, filed herewith.
32.3	Certification by the Chief Executive Officer of the Company, the sole general partner of the Operating Partnership pursuant to 18 U.S.C. section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, filed herewith.

148

32.4

Certification by the Chief Financial Officer of the Company, the sole general partner of the Operating Partnership pursuant to 18 U.S.C. section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, filed herewith.

101.1

The following financial statements from the SL Green Realty Corp. and SL Green Operating Partnership, L.P. 's Annual Report on Form 10-K for the year ended December 31, 2018, formatted in XBRL: (i) Consolidated Balance Sheets as of December 31, 2018 and 2017, (ii) Consolidated Statements of Operations for the years ended December 31, 2018, 2017 and 2016, (iii) Consolidated Statements of Comprehensive Income for the years ended December 31, 2018, 2017 and 2016, (iv) Consolidated Statement of Equity for the years ended December 31, 2018, 2017 and 2016 of the Company, (v) Consolidated Statement of Capital for the years ended December 31, 2018, 2017 and 2016 of the Operating Partnership (vi) Consolidated Statements of Cash Flows for the years ended December 31, 2018, 2017 and 2016, and (vii) Notes to Consolidated Financial Statements, detail tagged, filed herewith.

149

SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, as amended, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

	SL GREEN REALTY CORP.
	By:	/s/ Matthew J. DiLiberto
Dated: February 26, 2019		Matthew J. DiLiberto Chief Financial Officer

________________________________________________________________________________________________________________________

KNOW ALL MEN BY THESE PRESENTS, that we, the undersigned officers and directors of SL Green Realty Corp. hereby severally constitute Marc Holliday and Matthew J. DiLiberto, and each of them singly, our true and lawful attorneys and with full power to them, and each of them singly, to sign for us and in our names in the capacities indicated below, the Annual Report on Form 10-K filed herewith and any and all amendments to said Annual Report on Form 10-K, and generally to do all such things in our names and in our capacities as officers and directors to enable SL Green Realty Corp. to comply with the provisions of the Securities Exchange Act of 1934, as amended, and all requirements of the Securities and Exchange Commission, hereby ratifying and confirming our signatures as they may be signed by our said attorneys, or any of them, to said Annual Report on Form 10-K and any and all amendments thereto.

150

Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated:

Signatures	Title	Date
/s/ Marc Holliday	Chairman of the Board of Directors and Chief Executive Officer (Principal Executive Officer)	February 26, 2019
Marc Holliday
/s/ Andrew W. Mathias	President and Director	February 26, 2019
Andrew W. Mathias
/s/ Matthew J. DiLiberto	Chief Financial Officer (Principal Financial and Accounting Officer)	February 26, 2019
Matthew J. DiLiberto
/s/ Stephen L. Green	Director	February 26, 2019
Stephen L. Green
/s/ John H. Alschuler Jr.	Director	February 26, 2019
John H. Alschuler, Jr.
/s/ Edwin T. Burton, III	Director	February 26, 2019
Edwin T. Burton, III
/s/ John S. Levy	Director	February 26, 2019
John S. Levy
/s/ Craig M. Hatkoff	Director	February 26, 2019
Craig M. Hatkoff
/s/ Betsy S. Atkins	Director	February 26, 2019
Betsy S. Atkins
/s/ Lauren B. Dillard	Director	February 26, 2019
Lauren B. Dillard

151

SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, as amended, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

	SL GREEN OPERATING PARTNERSHIP, L.P.
	By:	SL Green Realty Corp.
		/s/ Matthew J. DiLiberto
Dated: February 26, 2019	By:	Matthew J. DiLiberto Chief Financial Officer

________________________________________________________________________________________________________________________

KNOW ALL MEN BY THESE PRESENTS, that we, the undersigned officers and directors of SL Green Realty Corp., the sole general partner of SL Green Operating Partnership, L.P., hereby severally constitute Marc Holliday and Matthew J. DiLiberto, and each of them singly, our true and lawful attorneys and with full power to them, and each of them singly, to sign for us and in our names in the capacities indicated below, the Annual Report on Form 10-K filed herewith and any and all amendments to said Annual Report on Form 10-K, and generally to do all such things in our names and in our capacities as officers and directors to enable SL Green Operating Partnership, L.P. to comply with the provisions of the Securities Exchange Act of 1934, as amended, and all requirements of the Securities and Exchange Commission, hereby ratifying and confirming our signatures as they may be signed by our said attorneys, or any of them, to said Annual Report on Form 10-K and any and all amendments thereto.

152

Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated:

Signatures	Title	Date
/s/ Marc Holliday	Chairman of the Board of Directors and Chief Executive Officer of SL Green, the sole general partner of the Operating Partnership (Principal Executive Officer)	February 26, 2019
Marc Holliday
/s/ Andrew W. Mathias	President and Director of SL Green, the sole general partner of the Operating Partnership	February 26, 2019
Andrew W. Mathias
/s/ Matthew J. DiLiberto	Chief Financial Officer of SL Green, the sole general partner of the Operating Partnership (Principal Financial and Accounting Officer)	February 26, 2019
Matthew J. DiLiberto
/s/ Stephen L. Green	Director of SL Green, the sole general partner of the Operating Partnership	February 26, 2019
Stephen L. Green
/s/ John H. Alschuler, Jr.	Director of SL Green, the sole general partner of the Operating Partnership	February 26, 2019
John H. Alschuler, Jr.
/s/ Edwin T. Burton, III	Director of SL Green, the sole general partner of the Operating Partnership	February 26, 2019
Edwin T. Burton, III
/s/ John S. Levy	Director of SL Green, the sole general partner of the Operating Partnership	February 26, 2019
John S. Levy
/s/ Craig M. Hatkoff	Director of SL Green, the sole general partner of the Operating Partnership	February 26, 2019
Craig M. Hatkoff
/s/ Betsy S. Atkins	Director of SL Green, the sole general partner of the Operating Partnership	February 26, 2019
Betsy S. Atkins
/s/ Lauren B. Dillard	Director of SL Green, the sole general partner of the Operating Partnership	February 26, 2019
Lauren B. Dillard

153

EX-21.1

Exhibit 21.1

SUBSIDIARIES OF SL GREEN REALTY CORP.

Entity Name	State of Incorporation
1 Madison Residential Holdings B LLC	Delaware
10 E 53 Owner LLC	Delaware
100 Church Fee Owner LLC	Delaware
1010 Washington SLG Owner LLC	Delaware
107-30 Rockaway Blvd LLC	Delaware
1080 Amsterdam Green A Member LLC	Delaware
1080 Amsterdam Green B Member LLC	Delaware
1080 Amsterdam Lessee LLC	Delaware
108-01 Rockaway Blvd LLC	Delaware
10E53 Partner LLC	Delaware
11 Madison Avenue Owner 2 LLC	Delaware
11 Madison Avenue Owner 3 LLC	Delaware
11 Madison Avenue Owner 4 LLC	Delaware
11 Madison Avenue Owner 5 LLC	Delaware
11 Madison Avenue Owner 6 LLC	Delaware
11 Madison Avenue Owner LLC	Delaware
11 Madison Holding LLC	Delaware
11 Madison Investor II LLC	Delaware
11 Madison Investor LLC	Delaware
11 Madison Member LLC	Delaware
11 Madison Principal 5 LLC	Delaware
102 Greene Holdings LLC	Delaware
102 Greene Owner LLC	Delaware, New York
110 E 42nd GP LLC	Delaware
110 E 42nd Holdco LLC	Delaware
110 E 42nd LPA LLC	Delaware
110 E 42nd Mezz II LP	Delaware
110 E42 Garage Owner LLC	Delaware
11W34 Investor LLC	Delaware
115 Spring Mezz LLC	Delaware
121 GREENE RETAIL OWNER LLC	Delaware
125 Chubb Holdings LLC (f/k/a SLG 114 Fifth Funding LLC)	Delaware
125 Park Owner LLC (f/k/a SLG 125 Park LLC)	Delaware
131 Spring Fee Owner LLC	Delaware
131 Spring Owner LLC	Delaware
150 Grand Owner LLC	Delaware
183 Broadway Owner LLC	Delaware
187 Broadway Owner LLC	Delaware
1515 Broadway GP, LLC	Delaware
1515 Broadway Mezzanine Owner LP	Delaware
1515 BROADWAY OWNER LP	Delaware
1515 Office TRS Corp.	Delaware
1515 Promote LLC	Delaware
1515 SLG Optionee LLC	Delaware
1515 SLG PRIVATE REIT I LLC	Delaware

Entity Name	State of Incorporation
1515 SLG Private REIT LLC	Delaware
16 Court Street Member LLC	Delaware
16 Court Street Owner LLC	Delaware
1640 Flatbush Owner LLC	Delaware
1640 Green Member LLC	Delaware
180 Maiden Member LLC	Delaware
187 Broadway Air Rights Owner LLC	Delaware
21E66 LT Investor LLC	Delaware
21E66 MM Investor LLC	Delaware
21E66 MM TRS LLC	Delaware
245 Park Member LLC	Delaware
33/34 West Owner LLC	Delaware
30 E 40th Street Development LLC	Delaware
30 E 40th Ground Lessee LLC	Delaware
30 E 40th Street JV LLC	Delaware
300 Main Lessee LLC	Delaware
304 PAS Holdings LLC	Delaware
304 PAS Owner LLC	Delaware
315 W 36 Member LLC	Delaware
333 East 22 Green Member LLC	Delaware
333 East 22 Lessee LLC	Delaware
333W34 SLG Owner LLC	Delaware
388 Realty Owner LLC	Delaware
388 SLG Investor LLC	Delaware
43rd Operator LLC	Delaware
400 E57 Fee Owner LLC	Delaware
400 E58 Owner LLC	Delaware
50 East 72 Owner LLC	Delaware
530 PARTICIPATION LLC	Delaware, New York
530 Pref Investor LLC	Delaware, New York
55W46 Investor LLC	Delaware
55W46 Member LLC	Delaware
574 Fifth Avenue Lessee LLC	Delaware
605 Green Member LLC	Delaware, New York
635 MADISON FEE OWNER LLC	Delaware, New York
635 Sixth Mezz LLC	Delaware
641 Sixth Fee Owner LLC	Delaware
641 Sixth Mezzanine LLC	Delaware
641 Sixth Owners LLC	Delaware
673 Interest Holder LLC	Delaware
712 Madison Holdco LLC	Delaware
719 Seventh Owner LLC	Delaware
750 Third Owner LLC	Delaware
752 Madison Member LLC	Delaware
752 Madison TRS LLC	Delaware
762 Madison Owner LLC	Delaware
885 Third Fee LLC	Delaware
885 Third Lot A Owner LLC	Delaware
885 Third Owner LLC	Delaware

Entity Name	State of Incorporation
919 Ground Lease Member LLC	Delaware
981 THIRD DEVELOPMENT LLC	Delaware, New York
985 Third Development LLC	Delaware
Arden Mezz Participant LLC	Delaware
Belmont Insurance Company	New York
Concept Space LLC	Delaware
East 72nd LLC	Delaware
eEmerge, Inc	Delaware, New York
EMERGE212 125 LLC	Delaware
Emerge212 3CC LLC	Delaware
Fifth Avenue Retail Partners LLC	Delaware
Fifth Avenue Retail Properties LLC	Delaware
Fifth Avenue Retail Ultimate LLC	Delaware
GKK Manager Member Corp.	Delaware
Greater New York Property LLC	Delaware
Green 121 Member LLC	Delaware
Green 1250 Broadway Acquisition LLC	Delaware, New York
Green 1250 Broadway LLC	Delaware, New York
Green 141 Fifth Investment LLC	Delaware
Green 141 Fifth Participation Corp.	Delaware
Green 155 Member LLC	Delaware
Green 1552 Member LLC	Delaware
Green 1604 Investment LLC	Delaware
Green 379 Broadway LLC	Delaware
Green 460 Member LLC	Delaware, New York
Green 461 Fifth Lessee LLC	Delaware, New York
Green 521 Fifth Avenue Holdings LLC	Delaware
Green 521 Fifth Mezz LLC	Delaware
Green 625 Mezz Lessee LLC	Delaware
Green 650 Member LLC	Delaware
Green 673 SPE Member Inc.	New York
Green 711 Fee Manager LLC	Delaware
Green 711 LM LLC	New York
Green 711 Mortgage Manager LLC	Delaware
Green 711 Sublease Manager LLC	Delaware
Green 724 Member LLC	Delaware
Green 747 Member LLC	Delaware
Green 800 Avenue Associates, LLC	Delaware
GREEN BEEKMAN LLC	Delaware
Green Broadway Nassau LLC	Delaware
Green Broadway/34 Investment LLC	Delaware
Green Eastside Member LLC	Delaware
Green Jericho Member LLC	Delaware
Green Loan Services LLC	Delaware
Green Meadows Member LLC	Delaware
Green W 57TH ST LLC	New York
Herald Square Acquisition LLC	Delaware
Herald Square GP LLC	Delaware
Herald Square Owner LLC	Delaware

Entity Name	State of Incorporation
Jericho Promote Member LLC	Delaware
Landmark Square 1-6 LLC	Delaware
Madison/65 Owner LLC	Delaware
MEADOW RT FUNDING LLC	Delaware
Metropolitan Partners, LLC	Delaware
New Green 673 Realty LLC	New York
North 3rd Acquisition LLC	Delaware
North 3rd MM LLC	Delaware
North 3rd MM TRS LLC	Delaware
North 3rd RU Investor LLC	Delaware
One-Two Jericho Plaza Owner LLC	Delaware
One Vanderbilt Owner LLC	Delaware
OS MEADOWS MEMBER II, LLC	Delaware
OVA Developer LLC	Delaware
OVA REIT Manager LLC	Delaware
Reckson Mezz. LLC	New York
Reckson Operating Partnership, L.P.	Delaware
Second Avenue Development Member LLC	Delaware
S.L. Green Management Corp.	New York
SL Green 100 Park LLC	New York
SL Green 800 JV Member LLC	Delaware
SL Green Capital Trust I	Delaware
SL Green Funding LLC*	New York
SL Green Investor LLC	Delaware
SL Green Management LLC	Delaware, New York
SL Green Operating Partnership L.P.	Delaware, New York
SL Green Realty Acquisition LLC	Delaware, New York
SL Green Realty Corp.	Maryland, New York
SL Green Servicing Corp.	Delaware
SL Green 800 Third Member LLC	Delaware
SLG 101 INVESTOR LLC	Delaware
SLG 1372 BROADWAY GP LLC	Delaware
SLG 1372 Broadway Limited Partner LLC	Delaware
SLG 1515 Broadway Finance LLC	Delaware
SLG 16 Court Street LLC	Delaware
SLG 16 Court Street 2 LLC	Delaware
SLG 2 Herald LLC	Delaware
SLG 2 Herald Manager LLC	Delaware
SLG 220 News Lessee LLC	Delaware
SLG 220 News MZ LLC	Delaware, New York
SLG 220 News Owner LLC	Delaware, New York
SLG 315 West LLC	Delaware
SLG 388 Greenwich Promote LLC	Delaware
SLG 388 Greenwich Shareholder LLC	Delaware
SLG 48 E. 43rd LLC	Delaware
SLG 500 West Putnam Owner LLC	Delaware
SLG 600 Lexington Interest Owner LLC	Delaware
SLG 600 Lexington Owner LLC	Delaware
SLG 600 Lexington Promote LLC	Delaware

Entity Name	State of Incorporation
SLG 600 Lexington SH LLC	Delaware
SLG 609 Fifth LLC	Delaware
SLG 625 Lessee LLC	Delaware
SLG 7 Renaissance Member LLC	Delaware
SLG 711 Fee LLC	New York
SLG 711 Third LLC	New York
SLG 711 Third Sublandlord LLC	Delaware
SLG 717 Fifth Member LLC	Delaware
SLG 885 Third Manager LLC	Delaware
SLG Arden Mezz 1 LLC	Delaware
SLG Asset Management Fee LLC	Delaware, New York
SLG Elevator Holdings LLC	New York
SLG Funding REIT LLC*	Delaware
SLG Gramercy Services LLC	Delaware
SLG Graybar LLC	Delaware
SLG Graybar Mesne Lease Corp	New York
SLG Graybar Mesne Lease I LLC	Delaware
SLG Graybar Mesne Lease LLC	New York
SLG Graybar New Ground Lessee LLC	Delaware
SLG Graybar New Lessee LLC	Delaware
SLG Graybar Sublease Corp	New York
SLG Graybar Sublease LLC	New York
SLG IRP Realty LLC	New York
SLG LeaseCo Member LLC	Delaware
SLG Lightpath LLC	Delaware
SLG Madison Investment LLC	Delaware
SLG Manager LLC	Delaware, New York
SLG One Park Shareholder II LLC	Delaware
SLG One Park Shareholder LLC	Delaware
SLG OpCo Holdings LLC	Delaware
SLG OpCo Member LLC	Delaware
SLG Park Avenue Investor LLC	Delaware
SLG Protective TRS Corp	Delaware, New York
SLG RSVP Member LLC	Delaware
SLG Tower 45 LLC	Delaware
Structured Finance TRS Corp.	Delaware

* The purpose of this entity is to engage in debt and preferred equity finance investments through various wholly-owned subsidiaries which are not included on this list.

EX-21.2

Exhibit 21.2

SUBSIDIARIES OF SL GREEN OPERATING PARTNERSHIP, L.P.

Entity Name	State of Incorporation
1 Madison Residential Holdings B LLC	Delaware
10 E 53 Owner LLC	Delaware
100 Church Fee Owner LLC	Delaware
1010 Washington SLG Owner LLC	Delaware
107-30 Rockaway Blvd LLC	Delaware
1080 Amsterdam Green A Member LLC	Delaware
1080 Amsterdam Green B Member LLC	Delaware
1080 Amsterdam Lessee LLC	Delaware
108-01 Rockaway Blvd LLC	Delaware
10E53 Partner LLC	Delaware
11 Madison Avenue Owner 2 LLC	Delaware
11 Madison Avenue Owner 3 LLC	Delaware
11 Madison Avenue Owner 4 LLC	Delaware
11 Madison Avenue Owner 5 LLC	Delaware
11 Madison Avenue Owner 6 LLC	Delaware
11 Madison Avenue Owner LLC	Delaware
11 Madison Holding LLC	Delaware
11 Madison Investor II LLC	Delaware
11 Madison Investor LLC	Delaware
11 Madison Member LLC	Delaware
11 Madison Principal 5 LLC	Delaware
110 E 42nd GP LLC	Delaware
110 E 42nd Holdco LLC	Delaware
110 E 42nd LPA LLC	Delaware
110 E 42nd Mezz II LP	Delaware
110 E42 Garage Owner LLC	Delaware
11W34 Investor LLC	Delaware
121 GREENE RETAIL OWNER LLC	Delaware
125 Chubb Holdings LLC (f/k/a SLG 114 Fifth Funding LLC)	Delaware
125 Park Owner LLC (f/k/a SLG 125 Park LLC)	Delaware
131 Spring Fee Owner LLC	Delaware
131 Spring Owner LLC	Delaware
150 Grand Owner LLC	Delaware
183 Broadway Owner LLC	Delaware
187 Broadway Owner LLC	Delaware
1515 Broadway GP, LLC	Delaware
1515 Broadway Mezzanine Owner LP	Delaware
1515 BROADWAY OWNER LP	Delaware
1515 Office TRS Corp.	Delaware
1515 Promote LLC	Delaware
1515 SLG Optionee LLC	Delaware

Entity Name	State of Incorporation
1515 SLG PRIVATE REIT I LLC	Delaware
1515 SLG Private REIT LLC	Delaware
16 Court Street Member LLC	Delaware
16 Court Street Owner LLC	Delaware
1640 Flatbush Owner LLC	Delaware
1640 Green Member LLC	Delaware
180 Maiden Member LLC	Delaware
187 Broadway Air Rights Owner LLC	Delaware
21E66 LT Investor LLC	Delaware
21E66 MM Investor LLC	Delaware
21E66 MM TRS LLC	Delaware
245 Park Member LLC	Delaware
33/34 West Owner LLC	Delaware
30 E 40th Street Development LLC	Delaware
30 E 40th Ground Lessee LLC	Delaware
30 E 40th Street JV LLC	Delaware
300 Main Lessee LLC	Delaware
304 PAS Holdings LLC	Delaware
304 PAS Owner LLC	Delaware
315 W 36 Member LLC	Delaware
333 East 22 Green Member LLC	Delaware
333 East 22 Lessee LLC	Delaware
333W34 SLG Owner LLC	Delaware
388 Realty Owner LLC	Delaware
388 SLG Investor LLC	Delaware
400 E57 Fee Owner LLC	Delaware
400 E58 Owner LLC	Delaware
43rd Operator LLC	Delaware
50 East 72 Owner LLC	Delaware
574 Fifth Avenue Lessee LLC	Delaware
635 Sixth Mezz LLC	Delaware
641 Sixth Fee Owner LLC	Delaware
641 Sixth Mezzanine LLC	Delaware
641 Sixth Owners LLC	Delaware
673 Interest Holder LLC	Delaware
712 Madison Holdco LLC	Delaware
750 Third Owner LLC	Delaware
762 Madison Owner LLC	Delaware
885 Third Fee LLC	Delaware
885 Third Lot A Owner LLC	Delaware
919 Ground Lease Member LLC	Delaware
985 Third Development LLC	Delaware
Arden Mezz Participant LLC	Delaware
Belmont Insurance Company	New York
Concept Space LLC	Delaware

Entity Name	State of Incorporation
East 72nd LLC	Delaware
eEmerge, Inc	Delaware, New York
EMERGE212 125 LLC	Delaware
Emerge212 3CC LLC	Delaware
Fifth Avenue Retail Partners LLC	Delaware
Fifth Avenue Retail Properties LLC	Delaware
Fifth Avenue Retail Ultimate LLC	Delaware
GKK Manager Member Corp.	Delaware
Greater New York Property LLC	Delaware
Green 1250 Broadway Acquisition LLC	Delaware, New York
Green 1250 Broadway LLC	Delaware, New York
Green 141 Fifth Investment LLC	Delaware
Green 141 Fifth Participation Corp.	Delaware
Green 155 Member LLC	Delaware
Green 1552 Member LLC	Delaware
Green 1604 Investment LLC	Delaware
Green 379 Broadway LLC	Delaware
Green 461 Fifth Lessee LLC	Delaware, New York
Green 521 Fifth Avenue Holdings LLC	Delaware
Green 521 Fifth Mezz LLC	Delaware
Green 625 Mezz Lessee LLC	Delaware
Green 650 Member LLC	Delaware
Green 673 SPE Member Inc.	New York
Green 711 Fee Manager LLC	Delaware
Green 711 LM LLC	New York
Green 711 Mortgage Manager LLC	Delaware
Green 711 Sublease Manager LLC	Delaware
Green 724 Member LLC	Delaware
Green 747 Member LLC	Delaware
Green 800 Avenue Associates, LLC	Delaware
GREEN BEEKMAN LLC	Delaware
Green Broadway Nassau LLC	Delaware
Green Broadway/34 Investment LLC	Delaware
Green Eastside Member LLC	Delaware
Green Jericho Member LLC	Delaware
Green Loan Services LLC	Delaware
Green Meadows Member LLC	Delaware
Green W 57TH ST LLC	New York
Herald Square Acquisition LLC	Delaware
Herald Square GP LLC	Delaware
Herald Square Owner LLC	Delaware
Jericho Promote Member LLC	Delaware
Landmark Square 1-6 LLC	Delaware
Madison/65 Owner LLC	Delaware
MEADOW RT FUNDING LLC	Delaware

Entity Name	State of Incorporation
Metropolitan Partners, LLC	Delaware
New Green 673 Realty LLC	New York
North 3rd Acquisition LLC	Delaware
North 3rd MM LLC	Delaware
North 3rd MM TRS LLC	Delaware
North 3rd RU Investor LLC	Delaware
One-Two Jericho Plaza Owner LLC	Delaware
One Vanderbilt Owner LLC	Delaware
OS MEADOWS MEMBER II, LLC	Delaware
OVA Developer LLC	Delaware
OVA REIT Manager LLC	Delaware
Reckson Mezz. LLC	New York
Reckson Operating Partnership, L.P.	Delaware
Second Avenue Development Member LLC	Delaware
S.L. Green Management Corp.	New York
SL Green 100 Park LLC	New York
SL Green 800 JV Member LLC	Delaware
SL Green Capital Trust I	Delaware
SL Green Funding LLC*	New York
SL Green Investor LLC	Delaware
SL Green Management LLC	Delaware, New York
SL Green Realty Acquisition LLC	Delaware, New York
SL Green Servicing Corp.	Delaware
SL Green 800 Third Member LLC	Delaware
SLG 101 INVESTOR LLC	Delaware
SLG 1372 BROADWAY GP LLC	Delaware
SLG 1372 Broadway Limited Partner LLC	Delaware
SLG 1515 Broadway Finance LLC	Delaware
SLG 16 Court Street LLC	Delaware
SLG 16 Court Street 2 LLC	Delaware
SLG 2 Herald LLC	Delaware
SLG 2 Herald Manager LLC	Delaware
SLG 220 News Lessee LLC	Delaware
SLG 220 News MZ LLC	Delaware, New York
SLG 220 News Owner LLC	Delaware, New York
SLG 315 West LLC	Delaware
SLG 388 Greenwich Promote LLC	Delaware
SLG 388 Greenwich Shareholder LLC	Delaware
SLG 48 E. 43rd LLC	Delaware
SLG 500 West Putnam Owner LLC	Delaware
SLG 600 Lexington Interest Owner LLC	Delaware
SLG 600 Lexington Owner LLC	Delaware
SLG 600 Lexington Promote LLC	Delaware
SLG 600 Lexington SH LLC	Delaware
SLG 609 Fifth LLC	Delaware

Entity Name	State of Incorporation
SLG 625 Lessee LLC	Delaware
SLG 7 Renaissance Member LLC	Delaware
SLG 711 Fee LLC	New York
SLG 711 Third LLC	New York
SLG 711 Third Sublandlord LLC	Delaware
SLG 717 Fifth Member LLC	Delaware
SLG 885 Third Manager LLC	Delaware
SLG Arden Mezz 1 LLC	Delaware
SLG Asset Management Fee LLC	Delaware, New York
SLG Elevator Holdings LLC	New York
SLG Funding REIT LLC*	Delaware
SLG Gramercy Services LLC	Delaware
SLG Graybar LLC	Delaware
SLG Graybar Mesne Lease Corp	New York
SLG Graybar Mesne Lease I LLC	Delaware
SLG Graybar Mesne Lease LLC	New York
SLG Graybar New Ground Lessee LLC	Delaware
SLG Graybar New Lessee LLC	Delaware
SLG Graybar Sublease Corp	New York
SLG Graybar Sublease LLC	New York
SLG IRP Realty LLC	New York
SLG LeaseCo Member LLC	Delaware
SLG Lightpath LLC	Delaware
SLG Madison Investment LLC	Delaware
SLG One Park Shareholder II LLC	Delaware
SLG One Park Shareholder LLC	Delaware
SLG OpCo Holdings LLC	Delaware
SLG OpCo Member LLC	Delaware
SLG Park Avenue Investor LLC	Delaware
SLG Protective TRS Corp	Delaware, New York
SLG RSVP Member LLC	Delaware
SLG Tower 45 LLC	Delaware
Structured Finance TRS Corp.	Delaware

* The purpose of this entity is to engage in debt and preferred equity finance investments through various wholly-owned subsidiaries which are not included on this list.

EX-23.1

Exhibit 23.1

Consent of Independent Registered Public Accounting Firm

We consent to the incorporation by reference in the following Registration Statements:

(i)  Registration Statement (Form S-3 Nos. 333-70111, 333-30394, 333‑62434, 333-126058, 333-211945, 333-228887 and 333-223209) of SL Green Realty Corp. and the related Prospectuses;

(ii)  Registration Statement (Form S-8 Nos. 333-61555, 333-87485, 333-89964, 333-127014, 333-143721, 333-189362 and 333-212108) pertaining to the Stock Option and Incentive Plans of SL Green Realty Corp., and

(iii) Registration Statement (Form S-8 No. 333-148973) pertaining to the 2008 Employee Stock Purchase Plan of SL Green Realty Corp.,

of our reports dated February 26, 2019, with respect to the consolidated financial statements of SL Green Realty Corp and the effectiveness of internal control over financial reporting of SL Green Realty Corp., included in this Annual Report (Form 10-K) for the year ended December 31, 2018.

/s/ Ernst & Young LLP

New York, New York

February 26, 2019

EX-23.2

Exhibit 23.2

Consent of Independent Registered Public Accounting Firm

We consent to the incorporation by reference in the Registration Statement (Form S-3 No. 333-228887) of SL Green Operating Partnership, L.P. and in the related Prospectus of our reports dated February 26, 2019, with respect to the consolidated financial statements of SL Green Operating Partnership, L.P., and the effectiveness of internal control over financial reporting of SL Green Operating Partnership, L.P., included in this Annual Report (Form 10-K) for the year ended December 31, 2018.

/s/ Ernst & Young LLP

New York, New York

February 26, 2019

EX-31.1

Exhibit 31.1

CERTIFICATION

I, Marc Holliday, certify that:

1. I have reviewed this annual report on Form 10-K of SL Green Realty Corp. (the “registrant”);

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: February 26, 2019
	/s/ Marc Holliday
Name:	Marc Holliday
Title:	Chairman and Chief Executive Officer

EX-31.2

Exhibit 31.2

CERTIFICATION

I, Matthew J. DiLiberto, certify that:

1. I have reviewed this annual report on Form 10-K of SL Green Realty Corp. (the “registrant”);

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: February 26, 2019
	/s/ Matthew J. DiLiberto
Name:	Matthew J. DiLiberto
Title:	Chief Financial Officer

EX-31.3

Exhibit 31.3

CERTIFICATION

I, Marc Holliday, certify that:

1. I have reviewed this annual report on Form 10-K of SL Green Operating Partnership, L.P. (the “registrant”);

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: February 26, 2019
	/s/ Marc Holliday
Name:	Marc Holliday
Title:	Chairman and Chief Executive Officer
	of SL Green Realty Corp., the
	general partner of the registrant

EX-31.4

Exhibit 31.4

CERTIFICATION

I, Matthew J. DiLiberto, certify that:

1. I have reviewed this annual report on Form 10-K of SL Green Operating Partnership, L.P. (the “registrant”);

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: February 26, 2019
	/s/ Matthew J. DiLiberto
Name:	Matthew J. DiLiberto
Title:	Chief Financial Officer
	of SL Green Realty Corp., the
	general partner of the registrant

EX-32.1

Exhibit 32.1

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Annual Report of SL Green Realty Corp. (the “Company”) on Form 10-K as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Marc Holliday, Chairman and Chief Executive Officer of the Company, hereby certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

1. The Report fully complies with the requirements of Section 13(a) or 15(d), as applicable, of the Securities Exchange Act of 1934; and

2. The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

	/s/ Marc Holliday
Name:	Marc Holliday
Title:	Chairman and Chief Executive Officer
February 26, 2019

EX-32.2

Exhibit 32.2

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Annual Report of SL Green Realty Corp. (the “Company”) on Form 10-K as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Matthew J. DiLiberto, Chief Financial Officer of the Company, hereby certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

1. The Report fully complies with the requirements of Section 13(a) or 15(d), as applicable, of the Securities Exchange Act of 1934; and

2. The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

	/s/ Matthew J. DiLiberto
Name:	Matthew J. DiLiberto
Title:	Chief Financial Officer
February 26, 2019

EX-32.3

Exhibit 32.3

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Annual Report of SL Green Operating Partnership, L.P. (the “Operating Partnership”) on Form 10-K as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Marc Holliday, Chairman and Chief Executive Officer of SL Green Realty Corp, the sole general partner of the Operating Partnership, hereby certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

1. The Report fully complies with the requirements of Section 13(a) or 15(d), as applicable, of the Securities Exchange Act of 1934; and

2. The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Operating Partnership.

	/s/ Marc Holliday
Name:	Marc Holliday
Title:	Chairman and Chief Executive Officer
	of SL Green Realty Corp., the
	general partner of the Operating Partnership
February 26, 2019

EX-32.4

Exhibit 32.4

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Annual Report of SL Green Operating Partnership, L.P. (the “Operating Partnership”) on Form 10-K as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Matthew J. DiLiberto, Chief Financial Officer of SL Green Realty Corp, the sole general partner of the Operating Partnership, hereby certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

1. The Report fully complies with the requirements of Section 13(a) or 15(d), as applicable, of the Securities Exchange Act of 1934; and

2. The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Operating Partnership.

	/s/ Matthew J. DiLiberto
Name:	Matthew J. DiLiberto
Title:	Chief Financial Officer
	of SL Green Realty Corp., the
	general partner of the Operating Partnership
February 26, 2019

XML

Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2018	Feb. 25, 2019	Jun. 30, 2018
Document Information [Line Items]
Entity Registrant Name	SL GREEN REALTY CORP
Entity Central Index Key	0001040971
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-K
Document Period End Date	Dec. 31, 2018
Document Fiscal Year Focus	2018
Document Fiscal Period Focus (Q1,Q2,Q3,FY)	FY
Amendment Flag	false
Entity Emerging Growth Company	false
Entity Small Business	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		84,325,436
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Public Float			$ 8,000,000,000
SL Green Operating Partnership
Document Information [Line Items]
Entity Registrant Name	SL GREEN OPERATING PARTNERSHIP, LP.
Entity Central Index Key	0001492869
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Document Type	10-K
Document Period End Date	Dec. 31, 2018
Document Fiscal Year Focus	2018
Document Fiscal Period Focus (Q1,Q2,Q3,FY)	FY
Amendment Flag	false
Entity Emerging Growth Company	false
Entity Small Business	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		1,022,921
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Public Float			$ 0

XML

Consolidated Balance Sheets - USD ($) $ in Thousands		Dec. 31, 2018	Dec. 31, 2017
Commercial real estate properties, at cost:
Land and land interests		$ 1,774,899	$ 2,357,051
Building and improvements		5,268,484	6,351,012
Building leasehold and improvements		1,423,107	1,450,614
Properties under capital lease		47,445	47,445
Total commercial real estate properties, at cost		8,513,935	10,206,122
Less: accumulated depreciation		(2,099,137)	(2,300,116)
Total commercial real estate properties, net		6,414,798	7,906,006
Assets held for sale		0	338,354
Cash and cash equivalents		129,475	127,888
Restricted cash		149,638	122,138
Investments in marketable securities		28,638	28,579
Tenant and other receivables, net of allowance of $15,702 and $18,637 in 2018 and 2017, respectively		41,589	57,644
Related party receivables		28,033	23,039
Deferred rents receivable, net of allowance of $15,457 and $17,207 in 2018 and 2017, respectively		335,985	365,337
Debt and preferred equity investments, net of discounts and deferred origination fees of $22,379 and $25,507 in 2018 and 2017, respectively, and allowance of $5,750 in 2018		2,099,393	2,114,041
Investments in unconsolidated joint ventures		3,019,020	2,362,989
Deferred costs, net		209,110	226,201
Other assets		295,679	310,688
Total assets	[1]	12,751,358	13,982,904
Liabilities
Mortgages and other loans payable, net		1,961,240	2,837,282
Revolving credit facility, net		492,196	30,336
Unsecured term loans, net		1,493,051	1,491,575
Unsecured notes, net		1,495,214	1,395,939
Accrued interest payable		23,154	38,142
Other liabilities		116,566	188,005
Accounts payable and accrued expenses		147,060	137,142
Deferred revenue		94,453	208,119
Capital lease obligations		43,616	42,843
Deferred land leases payable		3,603	3,239
Dividend and distributions payable		80,430	85,138
Security deposits		64,688	67,927
Liabilities related to assets held for sale		0	4,074
Junior subordinated deferrable interest debentures held by trusts that issued trust preferred securities		100,000	100,000
Total liabilities	[1]	6,115,271	6,629,761
Commitments and contingencies
Noncontrolling interests in Operating Partnership		387,805	461,954
Preferred units		300,427	301,735
Equity
Series I Preferred Stock, $0.01 par value, $25.00 liquidation preference, 9,200 issued and outstanding at both December 31, 2018 and 2017		221,932	221,932
Common stock, $0.01 par value, 160,000 shares authorized and 84,739 and 93,858 issued and outstanding at December 31, 2018 and 2017, respectively (including 1,055 and 1,055 shares held in treasury at December 31, 2018 and 2017, respectively)		847	939
Additional paid-in-capital		4,508,685	4,968,338
Treasury stock at cost		(124,049)	(124,049)
Accumulated other comprehensive income		15,108	18,604
Retained earnings		1,278,998	1,139,329
Total SL Green stockholders' equity		5,901,521	6,225,093
Noncontrolling interests in other partnerships		46,334	364,361
Total equity		5,947,855	6,589,454
SL Green stockholders equity:
Total liabilities and equity/capital		12,751,358	13,982,904
SL Green Operating Partnership
Commercial real estate properties, at cost:
Land and land interests		1,774,899	2,357,051
Building and improvements		5,268,484	6,351,012
Building leasehold and improvements		1,423,107	1,450,614
Properties under capital lease		47,445	47,445
Total commercial real estate properties, at cost		8,513,935	10,206,122
Less: accumulated depreciation		(2,099,137)	(2,300,116)
Total commercial real estate properties, net		6,414,798	7,906,006
Assets held for sale		0	338,354
Cash and cash equivalents		129,475	127,888
Restricted cash		149,638	122,138
Investments in marketable securities		28,638	28,579
Tenant and other receivables, net of allowance of $15,702 and $18,637 in 2018 and 2017, respectively		41,589	57,644
Related party receivables		28,033	23,039
Deferred rents receivable, net of allowance of $15,457 and $17,207 in 2018 and 2017, respectively		335,985	365,337
Debt and preferred equity investments, net of discounts and deferred origination fees of $22,379 and $25,507 in 2018 and 2017, respectively, and allowance of $5,750 in 2018		2,099,393	2,114,041
Investments in unconsolidated joint ventures		3,019,020	2,362,989
Deferred costs, net		209,110	226,201
Other assets		295,679	310,688
Total assets	[2]	12,751,358	13,982,904
Liabilities
Mortgages and other loans payable, net		1,961,240	2,837,282
Revolving credit facility, net		492,196	30,336
Unsecured term loans, net		1,493,051	1,491,575
Unsecured notes, net		1,495,214	1,395,939
Accrued interest payable		23,154	38,142
Other liabilities		116,566	188,005
Accounts payable and accrued expenses		147,060	137,142
Deferred revenue		94,453	208,119
Capital lease obligations		43,616	42,843
Deferred land leases payable		3,603	3,239
Dividend and distributions payable		80,430	85,138
Security deposits		64,688	67,927
Liabilities related to assets held for sale		0	4,074
Junior subordinated deferrable interest debentures held by trusts that issued trust preferred securities		100,000	100,000
Total liabilities	[2]	6,115,271	6,629,761
Limited partner interests in SLGOP (4,131 and 4,453 limited partner common units outstanding at December 31, 2018 and 2017, respectively)		387,805	461,954
Preferred units		300,427	301,735
Equity
Accumulated other comprehensive income		15,108	18,604
SL Green stockholders equity:
Series I Preferred Units, $25.00 liquidation preference, 9,200 issued and outstanding at both December 31, 2018 and 2017		221,932	221,932
SL Green partners' capital (878 and 973 general partner common units, and 82,806 and 91,831 limited partner common units outstanding at December 31, 2018 and 2017, respectively)		5,664,481	5,984,557
Total SLGOP partners' capital		5,901,521	6,225,093
Noncontrolling interests in other partnerships		46,334	364,361
Total capital		5,947,855	6,589,454
Total liabilities and equity/capital		$ 12,751,358	$ 13,982,904

[1] The Company's consolidated balance sheets include assets and liabilities of consolidated variable interest entities ("VIEs"). See Note 2. The consolidated balance sheets include the following amounts related to our consolidated VIEs, excluding the Operating Partnership: $110.0 million and $398.0 million of land, $0.3 billion and $1.4 billion of building and improvements, $2.0 million and $2.0 million of building and leasehold improvements, $47.4 million and $47.4 million of properties under capital lease, $42.2 million and $330.9 million of accumulated depreciation, $721.3 million and $221.0 million of other assets included in other line items, $140.8 million and $628.9 million of real estate debt, net, $0.4 million and $2.5 million of accrued interest payable, $43.6 million and $42.8 million of capital lease obligations, and $18.4 million and $56.8 million of other liabilities included in other line items as of December 31, 2018 and December 31, 2017, respectively.

[2] The Operating Partnership's consolidated balance sheets include assets and liabilities of consolidated variable interest entities ("VIEs"). See Note 2. The consolidated balance sheets include the following amounts related to our consolidated VIEs: $110.0 million and $398.0 million of land, $0.3 billion and $1.4 billion of building and improvements, $2.0 million and $2.0 million of building and leasehold improvements, $47.4 million and $47.4 million of properties under capital lease, $42.2 million and $330.9 million of accumulated depreciation, $721.3 million and $221.0 million of other assets included in other line items, $140.8 million and $628.9 million of real estate debt, net, $0.4 million and $2.5 million of accrued interest payable, $43.6 million and $42.8 million of capital lease obligations, and $18.4 million and $56.8 million of other liabilities included in other line items as of December 31, 2018 and December 31, 2017, respectively.

XML

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Tenant and other receivables, allowance	$ 15,702	$ 18,637
Deferred rents receivable, allowance	15,457	17,207
Discounts and deferred origination fees	22,379	25,507
Allowance for loan and lease losses	$ 5,750	$ 0
Preferred stock, par (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, liquidation preference (in dollars per share)	$ 25.00	$ 25.00
Preferred stock, shares issued (in shares)	9,200,000	9,200,000
Preferred stock, shares outstanding (in shares)	9,200,000	9,200,000
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	160,000,000	160,000,000
Common stock, shares issued (in shares)	84,739,000	93,858,000
Common stock, shares outstanding (in shares)	84,739,000	93,858,000
Treasury stock, shares (in shares)	1,055,000	1,055,000
Land	$ 1,774,899	$ 2,357,051
Building and improvements	5,268,484	6,351,012
Building leasehold and improvements	1,423,107	1,450,614
Properties under capital lease	47,445	47,445
Accumulated depreciation	2,099,137	2,300,116
Other assets	295,679	310,688
Real estate debt	1,961,240	2,837,282
Accrued interest payable	23,154	38,142
Capital lease obligations	43,616	42,843
Other liabilities	116,566	188,005
SL Green Operating Partnership
Tenant and other receivables, allowance	15,702	18,637
Deferred rents receivable, allowance	15,457	17,207
Discounts and deferred origination fees	22,379	$ 25,507
Allowance for loan and lease losses	$ 5,750
Limited partner interests in Operating Partnership, limited partner common units outstanding (shares)	4,131,000	4,453,000
Preferred units, liquidation preference (in dollars per share)	$ 25.00	$ 25.00
Preferred units, shares issued (in shares)	9,200,000	9,200,000
Preferred units, shares outstanding (in shares)	9,200,000	9,200,000
SL Green partner's capital, general partner common units outstanding (shares)	878,000	973,000
SL Green partners' capital, limited partner common units outstanding (shares)	82,806,000	91,831,000
Land	$ 1,774,899	$ 2,357,051
Building and improvements	5,268,484	6,351,012
Building leasehold and improvements	1,423,107	1,450,614
Properties under capital lease	47,445	47,445
Accumulated depreciation	2,099,137	2,300,116
Other assets	295,679	310,688
Real estate debt	1,961,240	2,837,282
Accrued interest payable	23,154	38,142
Capital lease obligations	43,616	42,843
Other liabilities	116,566	188,005
Consolidated VIEs
Land	110,000	398,000
Building and improvements	300,000	1,400,000
Building leasehold and improvements	2,000	2,000
Properties under capital lease	47,400	47,400
Accumulated depreciation	42,200	330,900
Other assets	721,300	221,000
Real estate debt	140,800	628,900
Accrued interest payable	400	2,500
Capital lease obligations	43,600	42,800
Other liabilities	$ 18,400	$ 56,800

XML

Consolidated Statements of Operations - USD ($) shares in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Revenues
Rental revenue, net	$ 864,978,000	$ 1,100,993,000	$ 1,323,767,000
Escalation and reimbursement	113,596,000	172,939,000	196,858,000
Investment income	201,492,000	193,871,000	213,008,000
Other income	47,326,000	43,670,000	130,348,000
Total revenues	1,227,392,000	1,511,473,000	1,863,981,000
Expenses
Operating expenses, including $17,823 in 2018, $21,400 in 2017, $21,890 in 2016 of related party expenses	229,347,000	293,364,000	312,859,000
Real estate taxes	186,351,000	244,323,000	248,388,000
Ground rent	32,965,000	33,231,000	33,261,000
Interest expense, net of interest income	208,669,000	257,045,000	321,199,000
Amortization of deferred financing costs	12,408,000	16,498,000	24,564,000
Depreciation and amortization	279,507,000	403,320,000	821,041,000
Loan loss and other investment reserves, net of recoveries	6,839,000	0	0
Transaction related costs	1,099,000	(1,834,000)	7,528,000
Marketing, general and administrative	92,631,000	100,498,000	99,759,000
Total expenses	1,049,816,000	1,346,445,000	1,868,599,000
Equity in net income from unconsolidated joint ventures	7,311,000	21,892,000	11,874,000
Equity in net gain on sale of interest in unconsolidated joint venture/real estate	303,967,000	16,166,000	44,009,000
Purchase price and other fair value adjustment	57,385,000	0	0
(Loss) gain on sale of real estate, net	(30,757,000)	73,241,000	238,116,000
Depreciable real estate reserves and impairment	(227,543,000)	(178,520,000)	(10,387,000)
Gain (loss) on sale of investment in marketable securities	0	3,262,000	(83,000)
Loss on early extinguishment of debt	(17,083,000)	0	0
Net income	270,856,000	101,069,000	278,911,000
Net (income) loss attributable to noncontrolling interests:
Noncontrolling interests in the Operating Partnership	(12,216,000)	(3,995,000)	(10,136,000)
Net (income) loss attributable to noncontrolling interests in other partnerships	6,000	15,701,000	(7,644,000)
Preferred unit distributions	(11,384,000)	(11,401,000)	(11,235,000)
Net income (loss) attributable to SL Green/SLGOP	247,262,000	101,374,000	249,896,000
Preferred stock/unit redemption costs	0	0	0
Perpetual preferred stock dividends	(14,950,000)	(14,950,000)	(14,950,000)
Net income attributable to SL Green common stockholders	$ 232,312,000	$ 86,424,000	$ 234,946,000
Basic weighted average common shares outstanding (in shares)	86,753	98,571	100,185
Diluted weighted average common shares and common share equivalents outstanding (in shares)	91,530	103,403	104,881
SL Green Operating Partnership
Revenues
Rental revenue, net	$ 864,978,000	$ 1,100,993,000	$ 1,323,767,000
Escalation and reimbursement	113,596,000	172,939,000	196,858,000
Investment income	201,492,000	193,871,000	213,008,000
Other income	47,326,000	43,670,000	130,348,000
Total revenues	1,227,392,000	1,511,473,000	1,863,981,000
Expenses
Operating expenses, including $17,823 in 2018, $21,400 in 2017, $21,890 in 2016 of related party expenses	229,347,000	293,364,000	312,859,000
Real estate taxes	186,351,000	244,323,000	248,388,000
Ground rent	32,965,000	33,231,000	33,261,000
Interest expense, net of interest income	208,669,000	257,045,000	321,199,000
Amortization of deferred financing costs	12,408,000	16,498,000	24,564,000
Depreciation and amortization	279,507,000	403,320,000	821,041,000
Loan loss and other investment reserves, net of recoveries	6,839,000	0	0
Transaction related costs	1,099,000	(1,834,000)	7,528,000
Marketing, general and administrative	92,631,000	100,498,000	99,759,000
Total expenses	1,049,816,000	1,346,445,000	1,868,599,000
Equity in net income from unconsolidated joint ventures	7,311,000	21,892,000	11,874,000
Equity in net gain on sale of interest in unconsolidated joint venture/real estate	303,967,000	16,166,000	44,009,000
Purchase price and other fair value adjustment	57,385,000	0	0
(Loss) gain on sale of real estate, net	(30,757,000)	73,241,000	238,116,000
Depreciable real estate reserves and impairment	(227,543,000)	(178,520,000)	(10,387,000)
Gain (loss) on sale of investment in marketable securities	0	3,262,000	(83,000)
Loss on early extinguishment of debt	(17,083,000)	0	0
Net income	270,856,000	101,069,000	278,911,000
Net (income) loss attributable to noncontrolling interests:
Net (income) loss attributable to noncontrolling interests in other partnerships	6,000	15,701,000	(7,644,000)
Preferred unit distributions	(11,384,000)	(11,401,000)	(11,235,000)
Net income (loss) attributable to SL Green/SLGOP	259,478,000	105,369,000	260,032,000
Preferred stock/unit redemption costs	0	0	0
Perpetual preferred stock dividends	(14,950,000)	(14,950,000)	(14,950,000)
Net income attributable to SLGOP common unitholders	$ 244,528,000	$ 90,419,000	$ 245,082,000
Basic earnings per unit (in dollars per share)	$ 2.67	$ 0.87	$ 2.34
Diluted earnings per unit (in dollars per share)	$ 2.67	$ 0.87	$ 2.34
Basic weighted average common shares outstanding (in shares)	91,315	103,127	104,508
Basic weighted average common units outstanding (in shares)	91,315	103,127	104,508
Diluted weighted average common shares and common share equivalents outstanding (in shares)	91,530	103,403	104,881
Diluted weighted average common units and common unit equivalents outstanding (in shares)	91,530	103,403	104,881

XML

Consolidated Statements of Operations (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Operating expenses, paid to related parties	$ 17,823	$ 21,400	$ 21,890
SL Green Operating Partnership
Operating expenses, paid to related parties	$ 17,823	$ 21,400	$ 21,890

XML

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Net income	$ 270,856	$ 101,069	$ 278,911
Other comprehensive income:
Change in net unrealized (loss) gain on derivative instruments, including SL Green's/SLGOP's share of joint venture net unrealized (loss) gain on derivative instruments	(3,622)	1,040	28,508
Change in unrealized gain (loss) on marketable securities	60	(4,667)	3,677
Other comprehensive (loss) income	(3,562)	(3,627)	32,185
Comprehensive income	267,294	97,442	311,096
Net (income) loss attributable to noncontrolling interests and preferred units distributions	(23,594)	305	(29,015)
Net loss (income) attributable to noncontrolling interests	6	15,701	(7,644)
Other comprehensive income (loss) attributable to noncontrolling interests	66	94	(1,299)
Comprehensive income attributable to SL Green/SLGOP	243,766	97,841	280,782
SL Green Operating Partnership
Net income	270,856	101,069	278,911
Other comprehensive income:
Change in net unrealized (loss) gain on derivative instruments, including SL Green's/SLGOP's share of joint venture net unrealized (loss) gain on derivative instruments	(3,622)	1,040	28,508
Change in unrealized gain (loss) on marketable securities	60	(4,667)	3,677
Other comprehensive (loss) income	(3,562)	(3,627)	32,185
Comprehensive income	267,294	97,442	311,096
Net loss (income) attributable to noncontrolling interests	6	15,701	(7,644)
Other comprehensive income (loss) attributable to noncontrolling interests	66	94	(1,299)
Comprehensive income attributable to SL Green/SLGOP	$ 267,366	$ 113,237	$ 302,153

XML

Consolidated Statement of Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid- In-Capital	Treasury Stock	Accumulated Other Comprehensive Income (Loss)	Retained Earnings	Noncontrolling Interests	Series I Preferred Stock Preferred Stock
Beginning Balance at Dec. 31, 2015	$ 7,719,317	$ 1,001	$ 5,439,735	$ (10,000)	$ (8,749)	$ 1,643,546	$ 431,852	$ 221,932
Beginning Balance (in shares) at Dec. 31, 2015		99,976,000
Increase (Decrease) in Stockholders' Equity
Net income (loss)	257,540					249,896	7,644
Other comprehensive income (loss)	30,886				30,886
Preferred dividends	(14,950)					(14,950)
DRSPP (in shares)		2,000
DRSPP proceeds	277		277
Conversion of units of the Operating Partnership to common stock (in shares)		295,000
Conversion of units in the Operating Partnership to common stock	31,806	$ 3	31,803
Reallocation of noncontrolling interest in the Operating Partnership	(4,222)					(4,222)
Deferred compensation plan and stock award, net (in shares)		96,000
Deferred compensation plan and stock awards, net of forfeitures and tax withholdings	23,902	$ 1	23,901
Issuance of common stock (in shares)
Repurchases of common stock	(40)	$ 10	113,999	(114,049)
Proceeds from stock options exercised (in shares)		193,000
Proceeds from stock options exercised	14,832	$ 2	14,830
Contributions to consolidated joint venture interests	2,359						2,359
Cash distributions to noncontrolling interests	(15,419)						(15,419)
Cash distributions declared (none of which represented a return of capital for federal income tax purposes)	(295,377)					(295,377)
Ending Balance at Dec. 31, 2016	7,750,911	$ 1,017	5,624,545	(124,049)	22,137	1,578,893	426,436	221,932
Ending Balance (in shares) at Dec. 31, 2016		100,562,000
Increase (Decrease) in Stockholders' Equity
Net income (loss)	85,673					101,374	(15,701)
Other comprehensive income (loss)	(3,533)				(3,533)
Preferred dividends	(14,950)					(14,950)
DRSPP (in shares)		2,000
DRSPP proceeds	223		223
Conversion of units of the Operating Partnership to common stock (in shares)		202,000
Conversion of units in the Operating Partnership to common stock	21,574	$ 2	21,572
Reallocation of noncontrolling interest in the Operating Partnership	5,712					5,712
Equity component of repurchased exchangeable senior notes	(109,776)		(109,776)
Deferred compensation plan and stock award, net (in shares)		87,000
Deferred compensation plan and stock awards, net of forfeitures and tax withholdings	$ 29,787	$ 1	29,786
Repurchases of common stock (in shares)	(8,342,411)	(8,342,000)
Repurchases of common stock	$ (848,048)	$ (83)	(621,324)			(226,641)
Proceeds from stock options exercised (in shares)		292,000
Proceeds from stock options exercised	23,314	$ 2	23,312
Contributions to consolidated joint venture interests	36,275						36,275
Deconsolidation of partially owned entity	(30,203)						(30,203)
Cash distributions to noncontrolling interests	(52,446)						(52,446)
Cash distributions declared (none of which represented a return of capital for federal income tax purposes)	(305,059)					(305,059)
Ending Balance at Dec. 31, 2017	6,589,454	$ 939	4,968,338	(124,049)	18,604	1,139,329	364,361	221,932
Ending Balance (in shares) at Dec. 31, 2017		92,803,000
Increase (Decrease) in Stockholders' Equity
Adjusted Balance	7,159,978	$ 939	4,968,338	(124,049)	18,604	1,709,853	364,361	221,932
Net income (loss)	247,256					247,262	(6)
Other comprehensive income (loss)	(3,496)				(3,496)
Preferred dividends	(14,950)					(14,950)
DRSPP (in shares)		1,000
DRSPP proceeds	136		136
Conversion of units of the Operating Partnership to common stock (in shares)		160,000
Conversion of units in the Operating Partnership to common stock	16,303	$ 2	16,301
Reallocation of noncontrolling interest in the Operating Partnership	34,236					34,236
Deferred compensation plan and stock award, net (in shares)		149,000
Deferred compensation plan and stock awards, net of forfeitures and tax withholdings	17,484	$ 1	17,483
Repurchases of common stock (in shares)		(9,745,000)
Repurchases of common stock	(937,795)	$ (98)	(522,482)			(415,215)
Proceeds from stock options exercised (in shares)		316,000
Proceeds from stock options exercised	28,912	$ 3	28,909
Contributions to consolidated joint venture interests	5,459						5,459
Deconsolidation of partially owned entity	(315,116)						(315,116)
Cash distributions to noncontrolling interests	(8,364)						(8,364)
Cash distributions declared (none of which represented a return of capital for federal income tax purposes)	(282,188)					(282,188)
Ending Balance at Dec. 31, 2018	$ 5,947,855	$ 847	$ 4,508,685	$ (124,049)	$ 15,108	$ 1,278,998	$ 46,334	$ 221,932
Ending Balance (in shares) at Dec. 31, 2018		83,684,000

XML

Consolidated Statement of Equity (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Statement of Stockholders' Equity [Abstract]
Cash distribution declared, per common share (in dollars per share)	$ 3.2875	$ 3.1375	$ 2.94

XML

Consolidated Statement of Capital - USD ($) shares in Thousands, $ in Thousands	3 Months Ended				12 Months Ended
	Dec. 31, 2018	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Jan. 01, 2018
Increase (Decrease) in Partner's Capital
Preferred dividends	$ 838	$ (8,319)	$ (6,616)	$ 14,165
Conversion of common units					$ 16,303	$ 21,574	$ 31,806
DRSPP proceeds					136	223	277
Reallocation of noncontrolling interests in the operating partnership					34,236	5,712	(4,222)
Equity component of repurchased exchangeable senior notes						(109,776)
Proceeds from stock options exercised					28,912	23,314	14,832
Deconsolidation of partially owned entity					(315,116)	(30,203)
Cash distributions to noncontrolling interests					(8,364)	(52,446)	(15,419)
Common Stock
Increase (Decrease) in Partner's Capital
Conversion of common units					$ 2	$ 2	$ 3
DRSPP (in units)					1	2	2
DRSPP proceeds
Proceeds from stock options exercised (in shares)					316	292	193
Proceeds from stock options exercised					$ 3	$ 2	$ 2
Noncontrolling Interests
Increase (Decrease) in Partner's Capital
Contributions to consolidated joint venture interests						36,275
Deconsolidation of partially owned entity					(315,116)	(30,203)
Cash distributions to noncontrolling interests					(8,364)	(52,446)	(15,419)
SL Green Operating Partnership
Increase (Decrease) in Partner's Capital
Beginning Balance		6,589,454		7,750,911	6,589,454	7,750,911	7,719,317
Adjusted Balance			7,159,978			7,159,978
Net income					247,256	85,673	257,540
Other comprehensive income (loss)					(3,496)	(3,533)	30,886
Preferred dividends	(2,601)	(3,047)	(5,328)	14,641	(14,950)	(14,950)	(14,950)
Conversion of common units					16,303	21,574	31,806
DRSPP proceeds					136	223	277
Reallocation of noncontrolling interests in the operating partnership					34,236	5,712	(4,222)
Equity component of repurchased exchangeable senior notes						(109,776)
Deferred compensation plan and stock awards, net of forfeitures and tax withholdings					17,484	29,787	23,902
Repurchases of common units					(937,795)	(848,048)
Proceeds from stock options exercised					28,912	23,314
Issuance of stock							(40)
Contributions to consolidated joint venture interests					5,459	36,275	2,359
Deconsolidation of partially owned entity					(315,116)	(30,203)
Proceeds from stock options exercised							14,832
Cash distributions to noncontrolling interests					(8,364)	(52,446)	(15,419)
Cash distributions declared (none of which represented a return of capital for federal income tax purposes)					(282,188)	(305,059)	(295,377)
Ending Balance	5,947,855		6,589,454		5,947,855	6,589,454	7,750,911
SL Green Operating Partnership | Preferred Units | Series I Preferred Stock
Increase (Decrease) in Partner's Capital
Beginning Balance		221,932		221,932	221,932	221,932	221,932
Adjusted Balance			221,932			221,932
Ending Balance	221,932		221,932		221,932	221,932	221,932
SL Green Operating Partnership | Common Stock | Partners' Interest
Increase (Decrease) in Partner's Capital
Beginning Balance		$ 5,984,557		$ 7,080,406	$ 5,984,557	$ 7,080,406	$ 7,074,282
Beginning Balance (units)		92,803		100,562	92,803	100,562	99,976
Adjusted Balance			6,555,081			$ 6,555,081
Net income					$ 247,262	101,374	$ 249,896
Preferred dividends					$ (14,950)	$ (14,950)	$ (14,950)
Conversion of common units (in units)					160	202	295
Conversion of common units					$ 16,303	$ 21,574	$ 31,806
DRSPP (in units)					1		2
DRSPP proceeds					$ 136	223	$ 277
Reallocation of noncontrolling interests in the operating partnership					$ 34,236	5,712	$ (4,222)
Equity component of repurchased exchangeable senior notes						$ (109,776)
Deferred compensation plan and stock award, net, (in units)					149	87	96
Deferred compensation plan and stock awards, net of forfeitures and tax withholdings					$ 17,484	$ 29,787	$ 23,902
Repurchases of common stock (in units)					(9,745)	(8,342)
Repurchases of common units					$ (937,795)	$ (848,048)
Proceeds from stock options exercised (in shares)					316	292
Proceeds from stock options exercised					$ 28,912	$ 23,314
Issuance of stock							$ (40)
Proceeds from stock options exercised (in units)							193
Proceeds from stock options exercised							$ 14,832
Cash distributions declared (none of which represented a return of capital for federal income tax purposes)					(282,188)	(305,059)	(295,377)
Ending Balance	$ 5,664,481		$ 5,984,557		$ 5,664,481	$ 5,984,557	$ 7,080,406
Ending Balance (units)	83,684		92,803		83,684	92,803	100,562
SL Green Operating Partnership | Accumulated Other Comprehensive Income (Loss)
Increase (Decrease) in Partner's Capital
Beginning Balance		$ 18,604		$ 22,137	$ 18,604	$ 22,137	$ (8,749)
Adjusted Balance			$ 18,604			18,604
Other comprehensive income (loss)					(3,496)	(3,533)	30,886
Ending Balance	$ 15,108		18,604		15,108	18,604	22,137
SL Green Operating Partnership | Noncontrolling Interests
Increase (Decrease) in Partner's Capital
Beginning Balance		$ 364,361		$ 426,436	364,361	426,436	431,852
Adjusted Balance			364,361			364,361
Net income					(6)	(15,701)	7,644
Contributions to consolidated joint venture interests					5,459		2,359
Deconsolidation of partially owned entity					(315,116)
Cash distributions to noncontrolling interests					(8,364)	(52,446)	(15,419)
Ending Balance	$ 46,334		$ 364,361		$ 46,334	$ 364,361	$ 426,436
Accounting Standards Update 2014-09
Increase (Decrease) in Partner's Capital
Cumulative adjustment upon adoption of ASC 610-20								$ 570,524
Accounting Standards Update 2014-09 | SL Green Operating Partnership
Increase (Decrease) in Partner's Capital
Cumulative adjustment upon adoption of ASC 610-20								570,524
Accounting Standards Update 2014-09 | SL Green Operating Partnership | Common Stock | Partners' Interest
Increase (Decrease) in Partner's Capital
Cumulative adjustment upon adoption of ASC 610-20								$ 570,524

XML

Consolidated Statement of Capital (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Cash distribution declared, per common share (in dollars per share)	$ 3.2875	$ 3.1375	$ 2.94
SL Green Operating Partnership
Cash distribution declared, per common share (in dollars per share)	$ 3.2875	$ 3.1375	$ 2.94

XML

Consolidated Statements of Cash Flows - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2018		Dec. 31, 2017	Dec. 31, 2016
Operating Activities
Net income		$ 270,856		$ 101,069	$ 278,911
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization		291,915		419,818	845,605
Equity in net income from unconsolidated joint ventures		(7,311)		(21,892)	(11,874)
Distributions of cumulative earnings from unconsolidated joint ventures		10,277		20,309	24,337
Equity in net gain on sale of interest in unconsolidated joint venture interest/real estate		(303,967)		(16,166)	(44,009)
Purchase price and other fair value adjustment		(57,385)		0	0
Depreciable real estate reserves and impairment		227,543		178,520	10,387
Loss (gain) on sale of real estate, net		30,757		(73,241)	(238,116)
Loan loss reserves and other investment reserves, net of recoveries		6,839		0	0
(Gain) loss on sale of investments in marketable securities		0		(3,262)	83
Loss on early extinguishment of debt		17,083		0	0
Deferred rents receivable		(18,216)		(38,009)	26,716
Other non-cash adjustments	[1]	2,932		19,621	(152,428)
Changes in operating assets and liabilities:
Tenant and other receivables		6,968		(5,717)	4,780
Related party receivables		(1,044)		(7,209)	(5,183)
Deferred lease costs		(44,158)		(41,939)	(70,707)
Other assets		(8,310)		(23,068)	9,899
Accounts payable, accrued expenses and other liabilities and security deposits		4,410		(12,440)	(35,628)
Deferred revenue and land leases payable		12,348		46,607	1,237
Net cash provided by operating activities		441,537		543,001	644,010
Investing Activities
Acquisitions of real estate property		(60,486)		(28,680)	(39,890)
Additions to land, buildings and improvements		(254,460)		(336,001)	(411,950)
Investments in unconsolidated joint ventures		(400,429)		(389,249)	(145,375)
Distributions in excess of cumulative earnings from unconsolidated joint ventures		233,118		319,745	196,211
Proceeds from disposition of real estate/joint venture interest		1,231,004		692,796	2,475,954
Proceeds from sale of marketable securities		0		55,129	6,965
Purchases of marketable securities		0		0	(43,341)
Other investments		(38,912)		25,330	7,704
Origination of debt and preferred equity investments		(731,216)		(1,129,970)	(977,413)
Repayments or redemption of debt and preferred equity investments		703,043		812,914	904,517
Net cash provided by investing activities		681,662		22,014	1,973,382
Financing Activities
Proceeds from mortgages and other loans payable		564,391		870,459	408,293
Repayments of mortgages and other loans payable		(868,842)		(902,460)	(1,822,303)
Proceeds from revolving credit facility, term loans and senior unsecured notes		3,120,000		2,784,599	1,325,300
Repayments of revolving credit facility, term loans and senior unsecured notes		(2,560,000)		(2,276,782)	(2,334,604)
Payments of debt extinguishment costs		13,918		0	0
Proceeds from stock options exercised and DRSPP issuance		29,048		23,537	15,109
Repurchase of common stock		(979,541)		(806,302)	0
Redemption of preferred stock		(1,208)		(275)	(3,299)
Redemption of OP units		(33,972)		0	0
Distributions to noncontrolling interests in other partnerships		(8,364)		(52,446)	(15,419)
Contributions from noncontrolling interests in other partnerships		5,459		36,275	2,359
Distributions to noncontrolling interests in the Operating Partnership		(15,000)		(14,266)	(12,671)
Dividends/Distributions paid on common and preferred stock/units		(313,230)		(333,543)	(314,079)
Other obligations related to mortgage loan participations		16		17,227	59,150
Payment of tax witholdings for restricted share awards		(3,842)		(3,879)	(3,162)
Deferred loan costs and capitalized lease obligation		(15,109)		(27,100)	(41,076)
Net cash used in by financing activities		(1,094,112)		(684,956)	(2,736,402)
Net increase (decrease) in cash and cash equivalents		29,087		(119,941)	(119,010)
Cash, restricted cash, and cash equivalents at beginning of year		250,026		369,967
Cash, restricted cash, and cash equivalents at end of period		279,113		250,026	369,967
Supplemental Cash Flow Information [Abstract]
Interest paid		259,776		273,819	344,295
Income taxes paid		1,418		2,448	2,009
Supplemental Disclosure of Non-Cash Investing and Financing Activities:
Issuance of units in the operating partnership		0		25,723	78,495
Redemption of units in the operating partnership		16,303		21,574	31,806
Redemption of units in the operating partnership for a joint venture sale		10,445		0	0
Exchange of debt investment for real estate or equity in joint venture		298,956		0	68,581
Tenant improvements and capital expenditures payable		0		6,667	15,972
Fair value adjustment to noncontrolling interest in operating partnership		34,236		5,712	4,222
Deconsolidation of a subsidiary	[2]	298,404		695,204	1,226,425
Transfer of assets to assets held for sale		0		611,809	2,048,376
Transfer of liabilities related to assets held for sale		0		5,364	1,677,528
Removal of fully depreciated commercial real estate properties		124,249		15,488	31,474
Issuance of SLG's common stock to a consolidated joint venture		0		0	114,049
Share repurchase payable		0		41,746	0
SL Green Operating Partnership
Operating Activities
Net income		270,856		101,069	278,911
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization		291,915		419,818	845,605
Equity in net income from unconsolidated joint ventures		(7,311)		(21,892)	(11,874)
Distributions of cumulative earnings from unconsolidated joint ventures		10,277		20,309	24,337
Equity in net gain on sale of interest in unconsolidated joint venture interest/real estate		(303,967)		(16,166)	(44,009)
Purchase price and other fair value adjustment		(57,385)		0	0
Depreciable real estate reserves and impairment		227,543		178,520	10,387
Loss (gain) on sale of real estate, net		30,757		(73,241)	(238,116)
Loan loss reserves and other investment reserves, net of recoveries		6,839		0	0
(Gain) loss on sale of investments in marketable securities		0		(3,262)	83
Loss on early extinguishment of debt		17,083		0	0
Deferred rents receivable		(18,216)		(38,009)	26,716
Other non-cash adjustments		2,932	[1]	19,621	(152,428)
Changes in operating assets and liabilities:
Tenant and other receivables		6,968		(5,717)	4,780
Related party receivables		(1,044)		(7,209)	(5,183)
Deferred lease costs		(44,158)		(41,939)	(70,707)
Other assets		(8,310)		(23,068)	9,899
Accounts payable, accrued expenses and other liabilities and security deposits		4,410		(12,440)	(35,628)
Deferred revenue and land leases payable		12,348		46,607	1,237
Net cash provided by operating activities		441,537		543,001	644,010
Investing Activities
Acquisitions of real estate property		(60,486)		(28,680)	(39,890)
Additions to land, buildings and improvements		(254,460)		(336,001)	(411,950)
Investments in unconsolidated joint ventures		(400,429)		(389,249)	(145,375)
Distributions in excess of cumulative earnings from unconsolidated joint ventures		233,118		319,745	196,211
Proceeds from disposition of real estate/joint venture interest		1,231,004		692,796	2,475,954
Proceeds from sale of marketable securities		0		55,129	6,965
Purchases of marketable securities		0		0	(43,341)
Other investments		(38,912)		25,330	7,704
Origination of debt and preferred equity investments		(731,216)		(1,129,970)	(977,413)
Repayments or redemption of debt and preferred equity investments		703,043		812,914	904,517
Net cash provided by investing activities		681,662		22,014	1,973,382
Financing Activities
Proceeds from mortgages and other loans payable		564,391		870,459	408,293
Repayments of mortgages and other loans payable		(868,842)		(902,460)	(1,822,303)
Proceeds from revolving credit facility, term loans and senior unsecured notes		3,120,000		2,784,599	1,325,300
Repayments of revolving credit facility, term loans and senior unsecured notes		(2,560,000)		(2,276,782)	(2,334,604)
Payments of debt extinguishment costs		13,918		0	0
Proceeds from stock options exercised and DRSPP issuance		29,048		23,537	15,109
Repurchase of common stock		(979,541)		(806,302)	0
Redemption of preferred stock		(1,208)		(275)	(3,299)
Redemption of OP units		(33,972)		0	0
Distributions to noncontrolling interests in other partnerships		(8,364)		(52,446)	(15,419)
Contributions from noncontrolling interests in other partnerships		5,459		36,275	2,359
Dividends/Distributions paid on common and preferred stock/units		(328,230)		(347,809)	(326,750)
Other obligations related to mortgage loan participations		16		17,227	59,150
Payment of tax witholdings for restricted share awards		(3,842)		(3,879)	(3,162)
Deferred loan costs and capitalized lease obligation		(15,109)		(27,100)	(41,076)
Net cash used in by financing activities		(1,094,112)		(684,956)	(2,736,402)
Net increase (decrease) in cash and cash equivalents		29,087		(119,941)	(119,010)
Cash, restricted cash, and cash equivalents at beginning of year		250,026		369,967	488,977
Cash, restricted cash, and cash equivalents at end of period		279,113		250,026	369,967
Supplemental Cash Flow Information [Abstract]
Interest paid		259,776		273,819	344,295
Income taxes paid		1,418		2,448	2,009
Supplemental Disclosure of Non-Cash Investing and Financing Activities:
Issuance of units in the operating partnership		0		25,723	78,495
Redemption of units in the operating partnership		16,303		21,574	31,806
Redemption of units in the operating partnership for a joint venture sale		10,445		0	0
Exchange of debt investment for real estate or equity in joint venture		298,956		0	68,581
Tenant improvements and capital expenditures payable		0		6,667	15,972
Fair value adjustment to noncontrolling interest in operating partnership		34,236		5,712	4,222
Deconsolidation of a subsidiary	[2]	298,404		695,204	1,226,425
Transfer of assets to assets held for sale		0		611,809	2,048,376
Transfer of liabilities related to assets held for sale		0		5,364	1,677,528
Removal of fully depreciated commercial real estate properties		124,249		15,488	31,474
Issuance of SLG's common stock to a consolidated joint venture		0		0	114,049
Share repurchase payable		0		41,746	0
Preferred Units
Supplemental Disclosure of Non-Cash Investing and Financing Activities:
Issuance of stock/units relating to the real estate acquisition		0		0	22,793
Preferred Units | SL Green Operating Partnership
Supplemental Disclosure of Non-Cash Investing and Financing Activities:
Issuance of stock/units relating to the real estate acquisition		$ 0		$ 0	$ 22,793

[1] Included in Other non-cash adjustments is $172.4 million for the year ended December 31, 2016 for the amortization of the below-market lease at 388-390 Greenwich Street as a result of the tenant exercising their option to purchase the property and entering into an agreement to accelerate the sale.

[2] $366.6 million of the 2017 amount relates to 1515 Broadway. In November 2017, the Company sold a 30.13% interest in 1515 Broadway to affiliates of Allianz Real Estate. The sale did not meet the criteria for sale accounting and as a result the property was accounted for under the profit sharing method. The Company achieved sale accounting upon adoption of ASC 610-20 in January 2018 and closed on the sale of an additional 12.87% interest in the property to Allianz in February 2018. See Note 6, "Investments in Unconsolidated Joint Ventures.".

XML

Consolidated Statements of Cash Flows (Parenthetical) - USD ($) $ in Thousands		1 Months Ended	12 Months Ended
		Nov. 30, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Quarterly distributions declared, per share/unit (usd per share/unit)			$ 0.85	$ 0.8125	$ 0.775
Deconsolidation of a subsidiary	[1]		$ 298,404	$ 695,204	$ 1,226,425
SL Green Operating Partnership
Quarterly distributions declared, per share/unit (usd per share/unit)			$ 0.85	$ 0.8125	$ 0.775
Deconsolidation of a subsidiary	[1]		$ 298,404	$ 695,204	$ 1,226,425
388-390 Greenwich Street
Amortization of below market leases				$ 172,400
388-390 Greenwich Street | SL Green Operating Partnership
Amortization of below market leases					$ 172,400
Allianz Real Estate | 1515 Broadway
Deconsolidation of a subsidiary		$ 366,600
Ownership percentage in disposed asset		30.13%

[1] $366.6 million of the 2017 amount relates to 1515 Broadway. In November 2017, the Company sold a 30.13% interest in 1515 Broadway to affiliates of Allianz Real Estate. The sale did not meet the criteria for sale accounting and as a result the property was accounted for under the profit sharing method. The Company achieved sale accounting upon adoption of ASC 610-20 in January 2018 and closed on the sale of an additional 12.87% interest in the property to Allianz in February 2018. See Note 6, "Investments in Unconsolidated Joint Ventures.".

XML

Organization and Basis of Presentation

12 Months Ended

Dec. 31, 2018

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Organization and Basis of Presentation

Organization and Basis of Presentation

SL Green Realty Corp., which is referred to as the Company or SL Green, a Maryland corporation, and SL Green Operating Partnership, L.P., which is referred to as SLGOP or the Operating Partnership, a Delaware limited partnership, were formed in June 1997 for the purpose of combining the commercial real estate business of S.L. Green Properties, Inc. and its affiliated partnerships and entities. The Operating Partnership received a contribution of interest in the real estate properties, as well as 95% of the economic interest in the management, leasing and construction companies which are referred to as the Service Corporation. All of the management, leasing and construction services that are provided to the properties that are wholly-owned by us and that are provided to certain joint ventures are conducted through SL Green Management LLC which is 100% owned by the Operating Partnership. The Company has qualified, and expects to qualify in the current fiscal year, as a real estate investment trust, or REIT, under the Internal Revenue Code of 1986, as amended, or the Code, and operates as a self-administered, self-managed REIT. A REIT is a legal entity that holds real estate interests and, through payments of dividends to stockholders, is permitted to minimize the payment of Federal income taxes at the corporate level. Unless the context requires otherwise, all references to "we," "our" and "us" means the Company and all entities owned or controlled by the Company, including the Operating Partnership.

Substantially all of our assets are held by, and all of our operations are conducted through, the Operating Partnership. The Company is the sole managing general partner of the Operating Partnership. As of December 31, 2018, noncontrolling investors held, in the aggregate, a 4.70% limited partnership interest in the Operating Partnership. We refer to these interests as the noncontrolling interests in the Operating Partnership. The Operating Partnership is considered a variable interest entity, or VIE, in which we are the primary beneficiary. See Note 11, "Noncontrolling Interests on the Company's Consolidated Financial Statements."

Reckson Associates Realty Corp., or Reckson, and Reckson Operating Partnership, L.P., or ROP, are wholly-owned subsidiaries of SL Green Realty Corp.

As of December 31, 2018, we owned the following interests in properties in the New York metropolitan area, primarily in midtown Manhattan. Our investments located outside of Manhattan are referred to as the Suburban properties:

		Consolidated			Unconsolidated		Total
Location	Property Type	Number of Properties		Approximate Square Feet (unaudited)	Number of Properties	Approximate Square Feet (unaudited)	Number of Properties	Approximate Square Feet (unaudited)	Weighted Average Occupancy(1) (unaudited)
Commercial:
Manhattan	Office	20		12,387,091	10	11,329,183	30	23,716,274	94.5	%
	Retail	7	(2)	325,648	9	352,174	16	677,822	96.7	%
	Development/Redevelopment	5		486,101	2	347,000	7	833,101	54.1	%
	Fee Interest	—		—	1	—	1	—	—	%
		32		13,198,840	22	12,028,357	54	25,227,197	93.2	%
Suburban	Office	13		2,295,200	—	—	13	2,295,200	91.3	%
	Retail	1		52,000	—	—	1	52,000	100.0	%
	Development/Redevelopment	1		1,000	—	—	1	1,000	—	%
		15		2,348,200	—	—	15	2,348,200	91.4	%
Total commercial properties		47		15,547,040	22	12,028,357	69	27,575,397	93.1	%
Residential:
Manhattan	Residential	2	(2)	445,105	10	2,156,751	12	2,601,856	91.5	%
Suburban	Residential	—		—	—	—	—	—	—	%
Total residential properties		2		445,105	10	2,156,751	12	2,601,856	91.5	%
Total portfolio		49		15,992,145	32	14,185,108	81	30,177,253	92.9	%

(1) The weighted average occupancy for commercial properties represents the total occupied square feet divided by total square footage at acquisition.  The weighted average occupancy for residential properties represents the total occupied units divided by total available units.

(2) As of December 31, 2018, we owned a building at 315 West 33rd Street, also known as The Olivia, that was comprised of approximately 270,132 square feet (unaudited) of retail space and approximately 222,855 square feet (unaudited) of residential space. For the purpose of this report, we have included this building in the number of retail properties we own. However, we have included only the retail square footage in the retail approximate square footage, and have listed the balance of the square footage as residential square footage.

As of December 31, 2018, we also managed two office buildings owned by third parties encompassing approximately 2.1 million square feet (unaudited) and held debt and preferred equity investments with a book value of $2.1 billion, including $0.1 billion of debt and preferred equity investments and other financing receivables that are included in balance sheet line items other than the Debt and Preferred Equity Investments line item.

Partnership Agreement

In accordance with the partnership agreement of the Operating Partnership, or the Operating Partnership Agreement, we allocate all distributions and profits and losses in proportion to the percentage of ownership interests of the respective partners. As the managing general partner of the Operating Partnership, we are required to take such reasonable efforts, as determined by us in our sole discretion, to cause the Operating Partnership to distribute sufficient amounts to enable the payment of sufficient dividends by us to minimize any Federal income or excise tax at the Company level. Under the Operating Partnership Agreement, each limited partner has the right to redeem units of limited partnership interests for cash, or if we so elect, shares of SL Green's common stock on a one-for-one basis.

XML

Significant Accounting Policies

12 Months Ended

Dec. 31, 2018

Accounting Policies [Abstract]

Significant Accounting Policies

Significant Accounting Policies

Principles of Consolidation

The consolidated financial statements include our accounts and those of our subsidiaries, which are wholly-owned or controlled by us. Entities which we do not control through our voting interest and entities which are variable interest entities, but where we are not the primary beneficiary, are accounted for under the equity method. See Note 5, "Debt and Preferred Equity Investments" and Note 6, "Investments in Unconsolidated Joint Ventures." All significant intercompany balances and transactions have been eliminated.

We consolidate a VIE in which we are considered the primary beneficiary. The primary beneficiary is the entity that has (i) the power to direct the activities that most significantly impact the entity's economic performance and (ii) the obligation to absorb losses of the VIE or the right to receive benefits from the VIE that could be significant to the VIE.

A noncontrolling interest in a consolidated subsidiary is defined as the portion of the equity (net assets) in a subsidiary not attributable, directly or indirectly, to us. Noncontrolling interests are required to be presented as a separate component of equity in the consolidated balance sheet and the presentation of net income is modified to present earnings and other comprehensive income attributed to controlling and noncontrolling interests.

We assess the accounting treatment for each joint venture and debt and preferred equity investment. This assessment includes a review of each joint venture or limited liability company agreement to determine the rights provided to each party and whether those rights are protective or participating. For all VIEs, we review such agreements in order to determine which party has the power to direct the activities that most significantly impact the entity's economic performance. In situations where we and our partner approve, among other things, the annual budget, receive a detailed monthly reporting package, meet on a quarterly basis to review the results of the joint venture, review and approve the joint venture's tax return before filing, and approve all leases that cover more than a nominal amount of space relative to the total rentable space at each property, we do not consolidate the joint venture as we consider these to be substantive participation rights that result in shared power of the activities that most significantly impact the performance of the joint venture. Our joint venture agreements typically contain certain protective rights such as requiring partner approval to sell, finance or refinance the property and the payment of capital expenditures and operating expenditures outside of the approved budget or operating plan.

Investment in Commercial Real Estate Properties

Real estate properties are presented at cost less accumulated depreciation and amortization. Costs directly related to the development or redevelopment of properties are capitalized. Ordinary repairs and maintenance are expensed as incurred; major replacements and betterments, which improve or extend the life of the asset, are capitalized and depreciated over their estimated useful lives.

We recognize the assets acquired, liabilities assumed (including contingencies) and any noncontrolling interests in an acquired entity at their respective fair values on the acquisition date. When we acquire our partner's equity interest in an existing unconsolidated joint venture and gain control over the investment, we record the consolidated investment at fair value. The difference between the book value of our equity investment on the purchase date and our share of the fair value of the investment's purchase price is recorded as a purchase price fair value adjustment in our consolidated statements of operations. See Note 3, "Property Acquisitions."

We allocate the purchase price of real estate to land and building (inclusive of tenant improvements) and, if determined to be material, intangibles, such as the value of above- and below-market leases and origination costs associated with the in-place leases. We depreciate the amount allocated to building (inclusive of tenant improvements) over their estimated useful lives, which generally range from three to 40 years. We amortize the amount allocated to the above- and below-market leases over the remaining term of the associated lease, which generally range from one to 14 years, and record it as either an increase (in the case of below-market leases) or a decrease (in the case of above-market leases) to rental income. We amortize the amount allocated to the values associated with in-place leases over the expected term of the associated lease, which generally ranges from one to 14 years. If a tenant vacates its space prior to the contractual termination of the lease and no rental payments are being made on the lease, any unamortized balance of the related intangible will be written off. The tenant improvements and origination costs are amortized as an expense over the remaining life of the lease (or charged against earnings if the lease is terminated prior to its contractual expiration date). We assess fair value of the leases based on estimated cash flow projections that utilize appropriate discount and capitalization rates and available market information. Estimates of future cash flows are based on a number of factors including the historical operating results, known trends, and market/economic conditions that may affect the property. To the extent acquired leases contain fixed rate renewal options that are below-market and determined to be material, we amortize such below-market lease value into rental income over the renewal period. As of December 31, 2018, the weighted average amortization period for above-market leases, below-market leases, and in-place lease costs is 1.8 years, 4.6 years, and 5.8 years, respectively.

We incur a variety of costs in the development and leasing of our properties. After the determination is made to capitalize a cost, it is allocated to the specific component of a project that is benefited. Determination of when a development project is substantially complete and capitalization must cease involves a degree of judgment. The costs of land and building under development include specifically identifiable costs. The capitalized costs include, but are not limited to, pre-construction costs essential to the development of the property, development costs, construction costs, interest costs, real estate taxes, salaries and related costs and other costs incurred during the period of development. We consider a construction project as substantially completed and held available for occupancy upon the completion of tenant improvements, but no later than one year after major construction activity ceases. We cease capitalization on the portions substantially completed and occupied or held available for occupancy, and capitalize only those costs associated with the portions under construction.

Properties are depreciated using the straight-line method over the estimated useful lives of the assets. The estimated useful lives are as follows:

Category	Term
Building (fee ownership)	40 years
Building improvements	shorter of remaining life of the building or useful life
Building (leasehold interest)	lesser of 40 years or remaining term of the lease
Property under capital lease	remaining lease term
Furniture and fixtures	four to seven years
Tenant improvements	shorter of remaining term of the lease or useful life

Depreciation expense (including amortization of capital lease assets) totaled $242.8 million, $365.3 million, and $783.5 million for the years ended December 31, 2018, 2017 and 2016, respectively.

On a periodic basis, we assess whether there are any indications that the value of our real estate properties may be impaired or that their carrying value may not be recoverable. A property's value is considered impaired if management's estimate of the aggregate future cash flows (undiscounted) to be generated by the property is less than the carrying value of the property. To the extent impairment has occurred, the loss will be measured as the excess of the carrying amount of the property over the calculated fair value of the property.

We also evaluate our real estate properties for impairment when a property has been classified as held for sale. Real estate assets held for sale are valued at the lower of their carrying value or fair value less costs to sell and depreciation expense is no longer recorded.

We recognized $6.8 million, $20.3 million, and $196.2 million of rental revenue for the years ended December 31, 2018, 2017, and 2016 respectively, for the amortization of aggregate below-market leases in excess of above-market leases and a reduction in lease origination costs, resulting from the allocation of the purchase price of the applicable properties. Included in rental revenue for the year ended December 31, 2016 is $172.4 million related to the amortization of below-market leases at 388-390 Greenwich Street as a result of the tenant exercising their option to purchase the property and entering into an agreement to accelerate the sale.

We recognized as a reduction to interest expense the amortization of the above-market rate mortgages assumed of $0.0 million, $0.8 million, and $2.8 million for the years ended December 31, 2018, 2017 and 2016, respectively.

The following summarizes our identified intangible assets (acquired above-market leases and in-place leases) and intangible liabilities (acquired below-market leases) as of December 31, 2018 and 2017 (in thousands):

	December 31,
	2018			2017
Identified intangible assets (included in other assets):
Gross amount	$	266,540		$	325,880
Accumulated amortization	(241,040		)	(277,038		)
Net(1)	$	25,500		$	48,842
Identified intangible liabilities (included in deferred revenue):
Gross amount	$	276,245		$	540,283
Accumulated amortization	(253,767		)	(402,583		)
Net(1)	$	22,478		$	137,700

(1) As of December 31, 2018, no net intangible assets and no net intangible liabilities were reclassified to assets held for sale and liabilities related to assets held for sale. As of December 31, 2017, $13.9 million net intangible assets and $4.1 million net intangible liabilities were reclassified to assets held for sale and liabilities related to assets held for sale.

The estimated annual amortization of acquired above-market leases, net of acquired (below-market) leases (a component of rental revenue), for each of the five succeeding years is as follows (in thousands):

2019	$	(5,227	)
2020	(3,655		)
2021	(1,631		)
2022	(1,328		)
2023	(749		)

The estimated annual amortization of all other identifiable assets (a component of depreciation and amortization expense) including tenant improvements for each of the five succeeding years is as follows (in thousands):

2019	$	9,825
2020	4,817
2021	3,454
2022	1,892
2023	1,507

Cash and Cash Equivalents

We consider all highly liquid investments with maturity of three months or less when purchased to be cash equivalents.

Restricted Cash

Restricted cash primarily consists of security deposits held on behalf of our tenants, interest reserves, as well as capital improvement and real estate tax escrows required under certain loan agreements.

Fair Value Measurements

See Note 16, "Fair Value Measurements."

Investment in Marketable Securities

At acquisition, we designate a security as held-to-maturity, available-for-sale, or trading. As of December 31, 2018, we did not have any securities designated as held-to-maturity or trading. We account for our available-for-sale securities at fair value pursuant to Accounting Standards Codification, or ASC, 820-10, with the net unrealized gains or losses reported as a component of accumulated other comprehensive income or loss. The cost of marketable securities sold and the amount reclassified out of accumulated other comprehensive income into earnings is determined using the specific identification method. Any unrealized losses that are determined to be other-than-temporary are recognized in earnings up to their credit component.

The Company adopted ASU 2016-01 effective January 1, 2018 which required entities to measure investments in equity securities at fair value and recognize any changes in fair value in net income. Upon adoption we did not hold investments in equity securities and therefore did not record a cumulative-effect adjustment. We did not hold investments in equity securities as of December 31, 2018.

At December 31, 2018 and 2017, we held the following marketable securities (in thousands):

	December 31,
	2018		2017
Commercial mortgage-backed securities	$	28,638	$	28,579
Total marketable securities available-for-sale	$	28,638	$	28,579

The cost basis of the commercial mortgage-backed securities was $27.5 million and $27.5 million at December 31, 2018 and 2017, respectively. These securities mature at various times through 2035. We held no equity marketable securities at December 31, 2018 and 2017.

During the year ended December 31, 2018, we did not dispose of any marketable securities.

During the year ended December 31, 2017, we disposed of marketable securities for aggregate net proceeds of $55.1 million and realized a loss of $3.3 million, which is included in gain (loss) on sale of investment in marketable securities on the consolidated statements of operations.

During the year ended December 31, 2016, we disposed of marketable securities for aggregate net proceeds of $7.0 million and realized a loss of $0.1 million, which is included in gain (loss) on sale of investment in marketable securities on the consolidated statements of operations.

Investments in Unconsolidated Joint Ventures

We account for our investments in unconsolidated joint ventures under the equity method of accounting in cases where we exercise significant influence over, but do not control, these entities and are not considered to be the primary beneficiary. We consolidate those joint ventures that we control or which are VIEs and where we are considered to be the primary beneficiary. In all these joint ventures, the rights of the joint venture partner are both protective as well as participating. Unless we are determined to be the primary beneficiary in a VIE, these participating rights preclude us from consolidating these VIE entities. These investments are recorded initially at cost, as investments in unconsolidated joint ventures, and subsequently adjusted for equity in net income (loss) and cash contributions and distributions. Equity in net income (loss) from unconsolidated joint ventures is allocated based on our ownership or economic interest in each joint venture and includes adjustments related to basis differences that were identified as part of the initial accounting for the investment. When a capital event (as defined in each joint venture agreement) such as a refinancing occurs, if return thresholds are met, future equity income will be allocated at our increased economic interest. We recognize incentive income from unconsolidated real estate joint ventures as income to the extent it is earned and not subject to a clawback feature. Distributions we receive from unconsolidated real estate joint ventures in excess of our basis in the investment are recorded as offsets to our investment balance if we remain liable for future obligations of the joint venture or may otherwise be committed to provide future additional financial support. None of the joint venture debt is recourse to us. The Company has performance guarantees under a master lease at one joint venture. See Note 6, "Investments in Unconsolidated Joint Ventures."

We assess our investments in unconsolidated joint ventures for recoverability, and if it is determined that a loss in value of the investment is other than temporary, we write down the investment to its fair value. We evaluate our equity investments for impairment based on the joint ventures' projected discounted cash flows. We do not believe that the values of any of our equity investments were impaired at December 31, 2018.

We may originate loans for real estate acquisition, development and construction, where we expect to receive some of the residual profit from such projects. When the risk and rewards of these arrangements are essentially the same as an investor or joint venture partner, we account for these arrangements as real estate investments under the equity method of accounting for investments. Otherwise, we account for these arrangements consistent with the accounting for our debt and preferred equity investments.

Deferred Lease Costs

Deferred lease costs consist of fees and direct costs incurred to execute operating leases and are amortized on a straight-line basis over the related lease term. Certain of our employees provide leasing services to the wholly-owned properties. For the years ended December 31, 2018, 2017 and 2016, $15.7 million, $16.4 million, and $15.4 million of their compensation, respectively, was capitalized and is amortized over an estimated average lease term of seven years.

Deferred Financing Costs

Deferred financing costs represent commitment fees, legal, title and other third party costs associated with obtaining commitments for financing which result in a closing of such financing. These costs are amortized over the terms of the respective agreements. Unamortized deferred financing costs are expensed when the associated debt is refinanced or repaid before maturity. Costs incurred in seeking financing transactions, which do not close, are expensed in the period in which it is determined that the financing will not close. Deferred financing costs related to a recognized debt liability are presented in the balance sheet as a direct deduction from the carrying amount of that debt liability.

Revenue Recognition

Rental revenue is recognized on a straight-line basis over the term of the lease. Rental revenue recognition commences when the tenant takes possession or controls the physical use of the leased space. In order for the tenant to take possession, the leased space must be substantially ready for its intended use. To determine whether the leased space is substantially ready for its intended use, management evaluates whether we are or the tenant is the owner of tenant improvements for accounting purposes. When management concludes that we are the owner of tenant improvements, rental revenue recognition begins when the tenant takes possession of the finished space, which is when such tenant improvements are substantially complete. In certain instances, when management concludes that we are not the owner (the tenant is the owner) of tenant improvements, rental revenue recognition begins when the tenant takes possession of or controls the space. When management concludes that we are the owner of tenant improvements for accounting purposes, we record amounts funded to construct the tenant improvements as a capital asset. For these tenant improvements, we record amounts reimbursed by tenants as a reduction of the capital asset. When management concludes that the tenant is the owner of tenant improvements for accounting purposes, we record our contribution towards those improvements as a lease incentive, which is included in deferred costs, net on our consolidated balance sheets and amortized as a reduction to rental revenue on a straight-line basis over the term of the lease. The excess of rents recognized over amounts contractually due pursuant to the underlying leases are included in deferred rents receivable on the consolidated balance sheets. We establish, on a current basis, an allowance for future potential tenant credit losses, which may occur against this account. The balance reflected on the consolidated balance sheets is net of such allowance.

In addition to base rent, our tenants also generally will pay their pro rata share of increases in real estate taxes and operating expenses for the building over a base year. In some leases, in lieu of paying additional rent based upon increases in building operating expenses, the tenant will pay additional rent based upon increases in the wage rate paid to porters over the porters' wage rate in effect during a base year or increases in the consumer price index over the index value in effect during a base year. In addition, many of our leases contain fixed percentage increases over the base rent to cover escalations. Electricity is most often supplied by the landlord either on a sub-metered basis, or rent inclusion basis (i.e., a fixed fee is included in the rent for electricity, which amount may increase based upon increases in electricity rates or increases in electrical usage by the tenant). Base building services other than electricity (such as heat, air conditioning and freight elevator service during business hours, and base building cleaning) are typically provided at no additional cost, with the tenant paying additional rent only for services which exceed base building services or for services which are provided outside normal business hours. These escalations are based on actual expenses incurred in the prior calendar year. If the expenses in the current year are different from those in the prior year, then during the current year, the escalations will be adjusted to reflect the actual expenses for the current year.

We record a gain on sale of real estate assets when we no longer hold a controlling financial interest in the entity holding the real estate, a contract exists with a third party and that third party has control of the assets acquired.

Investment income on debt and preferred equity investments is accrued based on the contractual terms of the instruments and when, in the opinion of management, it is deemed collectible. Some debt and preferred equity investments provide for accrual of interest at specified rates, which differ from current payment terms. Interest is recognized on such loans at the accrual rate subject to management's determination that accrued interest is ultimately collectible, based on the underlying collateral and operations of the borrower. If management cannot make this determination, interest income above the current pay rate is recognized only upon actual receipt.

Deferred origination fees, original issue discounts and loan origination costs, if any, are recognized as an adjustment to interest income over the terms of the related investments using the effective interest method. Fees received in connection with loan commitments are also deferred until the loan is funded and are then recognized over the term of the loan as an adjustment to yield. Discounts or premiums associated with the purchase of loans are amortized or accreted into interest income as a yield adjustment on the effective interest method based on expected cash flows through the expected maturity date of the related investment. If we purchase a debt or preferred equity investment at a discount, intend to hold it until maturity and expect to recover the full value of the investment, we accrete the discount into income as an adjustment to yield over the term of the investment. If we purchase a debt or preferred equity investment at a discount with the intention of foreclosing on the collateral, we do not accrete the discount. For debt investments acquired at a discount for credit quality, the difference between contractual cash flows and expected cash flows at acquisition is not accreted. Anticipated exit fees, the collection of which is expected, are also recognized over the term of the loan as an adjustment to yield.

Debt and preferred equity investments are placed on a non-accrual status at the earlier of the date at which payments become 90 days past due or when, in the opinion of management, a full recovery of interest income becomes doubtful. Interest income recognition on any non-accrual debt or preferred equity investment is resumed when such non-accrual debt or preferred equity investment becomes contractually current and performance is demonstrated to be resumed. Interest is recorded as income on impaired loans only to the extent cash is received.

We may syndicate a portion of the loans that we originate or sell the loans individually. When a transaction meets the criteria for sale accounting, we derecognize the loan sold and recognize gain or loss based on the difference between the sales price and the carrying value of the loan sold. Any related unamortized deferred origination fees, original issue discounts, loan origination costs, discounts or premiums at the time of sale are recognized as an adjustment to the gain or loss on sale, which is included in investment income on the consolidated statement of operations. Any fees received at the time of sale or syndication are recognized as part of investment income.

Asset management fees are recognized on a straight-line basis over the term of the asset management agreement.

Allowance for Doubtful Accounts

We maintain an allowance for doubtful accounts for estimated losses resulting from the inability of our tenants to make required payments. If the financial condition of a specific tenant were to deteriorate, resulting in an impairment of its ability to make payments, additional allowances may be required.

Allowance for Loan Loss and Other Investment Reserves

The expense for loan loss and other investment reserves in connection with debt and preferred equity investments is the charge to earnings to adjust the allowance for possible losses to the level that we estimate to be adequate, based on Level 3 data, considering delinquencies, loss experience and collateral quality.

The Company evaluates debt and preferred equity investments that are classified as held to maturity for possible impairment or credit deterioration associated with the performance and/or value of the underlying collateral property as well as the financial and operating capability of the borrower/sponsor. Quarterly, the Company assigns each loan a risk rating. Based on a 3-point scale, loans are rated “1” through “3,” from less risk to greater risk, which ratings are defined as follows: 1 - Low Risk Assets - Low probability of loss, 2 - Watch List Assets - Higher potential for loss, 3 - High Risk Assets - Loss more likely than not.

When it is probable that we will be unable to collect all amounts contractually due, the investment is considered impaired. A valuation allowance is measured based upon the excess of the recorded investment amount over the fair value of the collateral. Any deficiency between the carrying amount of an asset and the calculated value of the collateral is charged to expense. We continue to assess or adjust our estimates based on circumstances of a loan and the underlying collateral. If additional information reflects increased recovery of our investment, we will adjust our reserves accordingly.

Debt and preferred equity investments that are classified as held for sale are carried at the lower of cost or fair market value using available market information obtained through consultation with dealers or other originators of such investments as well as discounted cash flow models based on Level 3 data pursuant to ASC 820-10. As circumstances change, management may conclude not to sell an investment designated as held for sale. In such situations, the investment will be reclassified at its net carrying value to debt and preferred equity investments held to maturity. For these reclassified investments, the difference between the current carrying value and the expected cash to be collected at maturity will be accreted into income over the remaining term of the investment.

Rent Expense

Rent expense is recognized on a straight-line basis over the initial term of the lease. The excess of the rent expense recognized over the amounts contractually due pursuant to the underlying lease is included in the deferred lease payable on the consolidated balance sheets.

Underwriting Commissions and Costs

Underwriting commissions and costs incurred in connection with our stock offerings are reflected as a reduction of additional paid-in-capital.

Exchangeable Debt Instruments

The initial proceeds from exchangeable debt that may be settled in cash, including partial cash settlements, are bifurcated between a liability component and an equity component associated with the embedded conversion option. The objective of the accounting guidance is to require the liability and equity components of exchangeable debt to be separately accounted for in amanner such that the interest expense on the exchangeable debt is not recorded at the stated rate of interest but rather at an effective rate that reflects the issuer's conventional debt borrowing rate at the date of issuance. We calculate the liability component of exchangeable debt based on the present value of the contractual cash flows discounted at our comparable market conventional debt borrowing rate at the date of issuance. The difference between the principal amount and the fair value of the liability component is reported as a discount on the exchangeable debt that is accreted as additional interest expense from the issuance date through the contractual maturity date using the effective interest method. A portion of this additional interest expense may be capitalized to the development and redevelopment balances qualifying for interest capitalization each period. The liability component of the exchangeable debt is reported net of discounts on our consolidated balance sheets. We calculate the equity component of exchangeable debt based on the difference between the initial proceeds received from the issuance of the exchangeable debt and the fair value of the liability component at the issuance date. The equity component is included in additional paid-in-capital, net of issuance costs, on our consolidated balance sheets. We allocate issuance costs for exchangeable debt between the liability and the equity components based on their relative values.

Transaction Costs

In January 2017, we adopted ASU No. 2017-01, Business Combinations: Clarifying the Definition of a Business, which changed how we account for transaction costs. Prior to January 2017, transaction costs were expensed as incurred. Starting in January 2017, transaction costs for asset acquisitions are capitalized to the investment basis which is then subject to a purchase price allocation based on relative fair value and transaction costs for business combinations or costs incurred on potential transactions which are not consummated are expensed as incurred.

Income Taxes

SL Green is taxed as a REIT under Section 856(c) of the Code. As a REIT, SL Green generally is not subject to Federal income tax. To maintain its qualification as a REIT, SL Green must distribute at least 90% of its REIT taxable income to its stockholders and meet certain other requirements. If SL Green fails to qualify as a REIT in any taxable year, SL Green will be subject to Federal income tax on its taxable income at regular corporate rates. SL Green may also be subject to certain state, local and franchise taxes. Under certain circumstances, Federal income and excise taxes may be due on its undistributed taxable income.

The Operating Partnership is a partnership and, as a result, all income and losses of the partnership are allocated to the partners for inclusion in their respective income tax returns. The only provision for income taxes included in the consolidated statements of operations relates to the Operating Partnership’s consolidated taxable REIT subsidiaries. The Operating Partnership may also be subject to certain state, local and franchise taxes.

We have elected, and may elect in the future, to treat certain of our corporate subsidiaries as taxable REIT subsidiaries, or TRSs. In general, TRSs may perform non-customary services for the tenants of the Company, hold assets that we cannot hold directly and generally may engage in any real estate or non-real estate related business. The TRSs generate income, resulting in Federal and state income tax liability for these entities.

During the years ended December 31, 2018, 2017 and 2016, we recorded Federal, state and local tax provisions of $2.8 million, $4.3 million, and $2.8 million, respectively. For the year ended December 31, 2018, the Company paid distributions on its common stock of $3.25 per share which represented $1.46 per share of ordinary income and $1.79 per share of capital gains. For the year ended December 31, 2017, the Company paid distributions on its common stock of $3.10 per share which represented $1.24 per share of ordinary income, and $1.86 per share of capital gains. For the year ended December 31, 2016, the Company paid distributions on its common stock of $2.88 per share which represented $2.48 per share of ordinary income and $0.40 per share of capital gains.

We follow a two-step approach for evaluating uncertain tax positions. Recognition (step one) occurs when an enterprise concludes that a tax position, based solely on its technical merits, is more-likely-than-not to be sustained upon examination. Measurement (step two) determines the amount of benefit that is more-likely-than-not to be realized upon settlement. Derecognition of a tax position that was previously recognized would occur when a company subsequently determines that a tax position no longer meets the more-likely-than-not threshold of being sustained. The use of a valuation allowance as a substitute for derecognition of tax positions is prohibited.

On December 22, 2017, the Tax Cuts and Jobs Act (the ‘‘Tax Act’’) was signed into law and makes substantial changes to the Code. The Tax Act has not had a material impact on our financial statements for the years ended December 31, 2018 or December 31, 2017.

Stock-Based Employee Compensation Plans

We have a stock-based employee compensation plan, described more fully in Note 14, "Share-based Compensation."

The Company's stock options are recorded at fair value at the time of issuance. Fair value of the stock options is determined using the Black-Scholes option pricing model. The Black-Scholes model was developed for use in estimating the fair value of traded options, which have no vesting restrictions and are fully transferable. In addition, option valuation models require the input of highly subjective assumptions including the expected stock price volatility. Because our plan has characteristics significantly different from those of traded options and because changes in the subjective input assumptions can materially affect the fair value estimate, in our opinion, the existing models do not necessarily provide a reliable single measure of the fair value of the employee stock options.

Compensation cost for stock options, if any, is recognized over the vesting period of the award. Our policy is to grant options with an exercise price equal to the quoted closing market price of the Company's common stock on either the grant date or the date immediately preceding the grant date. Awards of stock or restricted stock are expensed as compensation over the benefit period based on the fair value of the stock on the grant date.

For share-based awards with a performance or market measure, we recognize compensation cost over the requisite service period, using the accelerated attribution expense method. The requisite service period begins on the date the compensation committee of our board of directors authorizes the award, adopts any relevant performance measures and communicates the award to the employees. For programs with awards that vest based on the achievement of a performance condition or market condition, we determine whether it is probable that the performance condition will be met, and estimate compensation cost based on the fair value of the award at the applicable award date estimated using a binomial model or market quotes. For share-based awards for which there is no pre-established performance measure, we recognize compensation cost over the service vesting period, which represents the requisite service period, on a straight-line basis. In accordance with the provisions of our share-based incentive compensation plans, we accept the return of shares of the Company's common stock, at the current quoted market price, from certain key employees to satisfy minimum statutory tax-withholding requirements related to shares that vested during the period.

Awards can also be made in the form of a separate series of units of limited partnership interest in the Operating Partnership called long-term incentive plan units, or LTIP units. LTIP units, which can be granted either as free-standing awards or in tandem with other awards under our stock incentive plan, are valued by reference to the value of the Company's common stock at the time of grant, and are subject to such conditions and restrictions as the compensation committee of the Company's board of directors may determine, including continued employment or service, computation of financial metrics and/or achievement of pre-established performance goals and objectives.

Derivative Instruments

In the normal course of business, we use a variety of commonly used derivative instruments, such as interest rate swaps, caps, collars and floors, to manage, or hedge, interest rate risk. Effectiveness is essential for those derivatives that we intend to qualify for hedge accounting. Some derivative instruments are associated with an anticipated transaction. In those cases, hedge effectiveness criteria also require that it be probable that the underlying transaction occurs. Instruments that meet these hedging criteria are formally designated as hedges at the inception of the derivative contract.

To determine the fair values of derivative instruments, we use a variety of methods and assumptions that are based on market conditions and risks existing at each balance sheet date. For the majority of financial instruments including most derivatives, long-term investments and long-term debt, standard market conventions and techniques such as discounted cash flow analysis, option pricing models, replacement cost, and termination cost are used to determine fair value. All methods of assessing fair value result in a general approximation of value, and such value may never actually be realized.

In the normal course of business, we are exposed to the effect of interest rate changes and limit these risks by following established risk management policies and procedures including the use of derivatives. To address exposure to interest rates, derivatives are used primarily to fix the rate on debt based on floating-rate indices and manage the cost of borrowing obligations.

We use a variety of conventional derivative products. These derivatives typically include interest rate swaps, caps, collars and floors. We expressly prohibit the use of unconventional derivative instruments and using derivative instruments for trading or speculative purposes. Further, we have a policy of only entering into contracts with major financial institutions based upon their credit ratings and other factors.

We may employ swaps, forwards or purchased options to hedge qualifying forecasted transactions. Gains and losses related to these transactions are deferred and recognized in net income as interest expense in the same period or periods that the underlying transaction occurs, expires or is otherwise terminated.

Hedges that are reported at fair value and presented on the balance sheet could be characterized as cash flow hedges or fair value hedges. Interest rate caps and collars are examples of cash flow hedges. Cash flow hedges address the risk associated with future cash flows of interest payments. For all hedges held by us and which were deemed to be fully effective in meeting the hedging objectives established by our corporate policy governing interest rate risk management, no net gains or losses were reported in earnings. The changes in fair value of hedge instruments are reflected in accumulated other comprehensive income. For derivative instruments not designated as hedging instruments, the gain or loss, resulting from the change in the estimated fair value of the derivative instruments, is recognized in current earnings during the period of change.

Earnings per Share of the Company

The Company presents both basic and diluted earnings per share, or EPS, using the two-class method, which is an earnings allocation formula that determines EPS for common stock and any participating securities according to dividends declared (whether paid or unpaid). Under the two-class method, basic EPS is computed by dividing the income available to common stockholders by the weighted-average number of common stock shares outstanding for the period. Basic EPS includes participating securities, consisting of unvested restricted stock that receive nonforfeitable dividends similar to shares of common stock. Diluted EPS reflects the potential dilution that could occur if securities or other contracts to issue common stock were exercised or converted into common stock, where such exercise or conversion would result in a lower EPS amount. Diluted EPS also includes units of limited partnership interest. The dilutive effect of stock options is reflected in the weighted average diluted outstanding shares calculation by application of the treasury stock method. There was no dilutive effect for the exchangeable senior notes as the conversion premium was to be paid in cash.

Earnings per Unit of the Operating Partnership

The Operating Partnership presents both basic and diluted earnings per unit, or EPU, using the two-class method, which is an earnings allocation formula that determines EPU for common units and any participating securities according to dividends declared (whether paid or unpaid). Under the two-class method, basic EPU is computed by dividing the income available to common unitholders by the weighted-average number of common units outstanding for the period. Basic EPU includes participating securities, consisting of unvested restricted units that receive nonforfeitable dividends similar to shares of common units. Diluted EPU reflects the potential dilution that could occur if securities or other contracts to issue common units were exercised or converted into common units, where such exercise or conversion would result in a lower EPU amount. The dilutive effect of unit options is reflected in the weighted average diluted outstanding units calculation by application of the treasury stock method. There was no dilutive effect for the exchangeable senior notes as the conversion premium was to be paid in cash.

Use of Estimates

The preparation of financial statements in conformity with accounting principles generally accepted in the United States requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Actual results could differ from those estimates.

Concentrations of Credit Risk

Financial instruments that potentially subject us to concentrations of credit risk consist primarily of cash investments, debt and preferred equity investments and accounts receivable. We place our cash investments with high quality financial institutions. The collateral securing our debt and preferred equity investments is located in the New York metropolitan area. See Note 5, "Debt and Preferred Equity Investments."

We perform ongoing credit evaluations of our tenants and require most tenants to provide security deposits or letters of credit. Though these security deposits and letters of credit are insufficient to meet the total value of a tenant's lease obligation, they are a measure of good faith and a source of funds to offset the economic costs associated with lost revenue and the costs associated with re-tenanting a space. The properties in our real estate portfolio are located in the New York metropolitan area. The tenants located in our buildings operate in various industries. Other than one tenant, Credit Suisse Securities (USA), Inc., who accounts for 8.2% of our share of annualized cash rent, no other tenant in our portfolio accounted for more than 5.0% of our share of annualized cash rent, including our share of joint venture annualized cash rent, at December 31, 2018.

For the years ended December 31, 2018, 2017, and 2016, the following properties contributed more than 5.0% of our annualized cash rent, including our share of joint venture annualized cash rent:

Property	2018	Property	2017	Property	2016
11 Madison Avenue	7.4%	11 Madison Avenue	7.1%	1515 Broadway	8.8%
1185 Avenue of the Americas	6.7%	1185 Avenue of the Americas	7.1%	1185 Avenue of the Americas	6.9%
420 Lexington Avenue	6.5%	1515 Broadway	7.0%	11 Madison Avenue	6.1%
1515 Broadway	6.0%	420 Lexington Avenue	6.0%	420 Lexington Avenue	5.9%
One Madison Avenue	5.8%	One Madison Avenue	5.6%	One Madison Avenue	5.6%

As of December 31, 2018, 68.7% of our work force is covered by six collective bargaining agreements and 56.0% of our work force, which services substantially all of our properties, is covered by collective bargaining agreements that expire in December 2019. See Note 19, "Benefits Plans."

Reclassification

Certain prior year balances have been reclassified to conform to our current year presentation.

Accounting Standards Updates

In October 2018, the FASB issued Accounting Standard Update (ASU) No. 2018-17, Consolidation (Topic 810), Targeted Improvements to Related Party Guidance for Variable Interest Entities. Under this amendment reporting entities, when determining if the decision-making fees are variable interests, are to consider indirect interests held through related parties under common control on a proportional basis rather than as a direct interest in its entirety. The guidance is effective for the Company for fiscal years beginning after December 15, 2019. Early adoption is permitted. The Company has adopted this guidance and it had no impact on the Company’s consolidated financial statements.

In August 2018, The Securities and Exchange Commission adopted a final rule that eliminated or amended disclosure requirements that were redundant or outdated in light of changes in its requirements, generally accepted accounting principles, or changes in the business environment. The commission also referred certain disclosure requirements to the Financial Accounting Standards Board for potential incorporation into generally accepted accounting principles. The rule is effective for filings after November 5, 2018. The Company assessed the impact of this rule and determined that the changes resulted in clarification or expansion of existing requirements. The Company early adopted the rule upon publication to the federal register on October 5, 2018 and it did not have a material impact on the Company’s consolidated financial statements.

In August 2018, the FASB issued Accounting Standard Update (ASU) No. 2018-15, Intangibles - Goodwill and Other- Internal-Use Software (Topic 350-40), Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That is a Service Contract. The amendments provide guidance on accounting for fees paid when the arrangement includes a software license and align the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing costs to develop or obtain internal-use software. The guidance is effective for the Company for fiscal years beginning after December 15, 2019. Early adoption is permitted. The Company has not yet adopted this new guidance and does not expect it to have a material impact on the Company’s consolidated financial statements when the new standard is implemented.

In August 2018, the FASB issued ASU No. 2018-13, Fair Value Measurement (Topic 820), Disclosure Framework - Changes to the Disclosure Requirements for Fair Value Measurement. This amendment removed, modified and added the disclosure requirements under Topic 820. The changes are effective for the Company for fiscal years beginning after December 15, 2019. Early adoption is permitted for the removed or modified disclosures with adoption of the additional disclosures upon the effective date. The Company has not yet adopted this new guidance and does not expect it to have a material impact on the Company’s consolidated financial statements when the new standard is implemented.

In June 2018, the FASB issued ASU No. 2018-07, Compensation - Stock Compensation (Topic 718), Improvements to Nonemployee Share-Based Payment Accounting. This amendment provides additional guidance related to share-based payment transactions for acquiring goods or services from nonemployees. The guidance is effective for the Company for fiscal years beginning after December 15, 2018, including the interim periods within that fiscal year. The Company will adopt this guidance January 1, 2019 and does not expect it to have a material impact on the Company’s consolidated financial statements.

In February 2018, the FASB issued ASU No. 2018-03, Technical Corrections and Improvements to Financial Instruments- Overall (Subtopic 825-10), Recognition and Measurement of Financial Assets and Financial Liabilities. These amendments provide additional guidance related to equity securities without a readily determinable fair value, forward contracts and options purchased on those equity securities and fair value option liabilities. The Company adopted the guidance on July 1, 2018, and it did not have a material impact on the Company’s consolidated financial statements.

In August 2017, the FASB issued ASU No. 2017-12, Derivatives and Hedging (Topic 815), Targeted Improvements to Accounting for Hedging Activities, and in July 2018, the FASB issued ASU No. 2018-16, Derivatives and Hedging (Topic 815): Inclusion of the Secured Overnight Financing Rate (SOFR) Overnight Index Swap (OIS) Rate as a Benchmark Interest Rate for Hedge Accounting Purposes. The amendments in the new standards will permit more flexibility in hedging interest rate risk for both variable rate and fixed rate financial instruments. The standards will also enhance the presentation of hedge results in the financial statements. The guidance is effective for fiscal years beginning after December 15, 2018. Early adoption is permitted. The Company will adopt this guidance January 1, 2019, and does not expect a material impact on the Company’s consolidated financial statements when the new standards are implemented.

In May 2017, the FASB issued ASU No. 2017-09, Compensation - Stock Compensation (Topic 718), Scope of Modification Accounting. The guidance clarifies the changes to the terms or conditions of a share-based payment award that require an entity to apply modification accounting in Topic 718. The Company adopted the guidance on January 1, 2018 and it had no impact on the Company's consolidated financial statements.

In November 2016, the FASB issued ASU No. 2016-18, Statement of Cash Flows (Topic 230): Restricted Cash. The guidance requires that the statement of cash flows explain the change during the period in the total of cash, cash equivalents, and amounts generally described as restricted cash. As a result, entities will no longer present transfers between these items on the statement of cash flows. The Company adopted the guidance on January 1, 2018 and has included the changes in restricted cash when reconciling the beginning-of-period and end-of-period total amounts on the statement of cash flows.

In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments and in November 2018 issued ASU No. 2018-19, Codification Improvements to Topic 326, Financial Instruments - Credit Losses. . The guidance changes how entities will measure credit losses for most financial assets and certain other instruments that are not measured at fair value through net income. The guidance replaces the current ‘incurred loss’ model with an ‘expected loss’ approach. The guidance is effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. Early adoption is permitted after December 15, 2018. The Company’s DPE portfolio and capital lease assets will be subject to this guidance once the Company adopts it. ASU No. 2018-19 excludes operating lease receivables from the scope of this guidance. The Company continues to evaluate the impact of adopting this new accounting standard on the Company’s consolidated financial statements.

In February 2016, the FASB issued ASU No. 2016-02, Leases. In July 2018, the FASB issued ASU No. 2018-10 - Codification Improvements to Topic 842, Leases and ASU No. 2018-11 - Targeted Improvements. In December 2018, the FASB issued ASU No. 2018-20 - Narrow-Scope Improvements for Lessors. This guidance requires lessees to recognize lease assets and lease liabilities for those leases classified as operating leases under the previous standard. Depending on the lease classification, lessees will recognize expense based on the effective interest method for finance leases or on a straight-line basis for operating leases. The Company will apply this guidance to the ground leases under which the Company is lessee. The Company is required to record a liability for the obligation to make payments under the lease and an asset for the right to use the underlying asset during the lease term and will also apply the new expense recognition requirements given the lease classification. While the Company is continuing to assess all potential impacts of the standard, we expect total liabilities and total assets to increase by $0.4 to $0.5 billion as of the date of adoption. The accounting applied by a lessor is largely unchanged from that applied under the previous standard. The Company does expect to adopt the practical expedient offered in ASU No. 2018-11 that allows lessors to not separate non-lease components from the related lease components under certain conditions, which the Company expects most of its leases to qualify for. Additionally, for future leases, the Company will no longer capitalize internal leasing costs as these costs are not considered to be incremental under the new guidance. The Company is assessing all potential impacts of the standard and currently estimates a decrease in net income of approximately $10.0 million related to this change based on its initial assessment. This guidance in this standard is effective for fiscal years beginning after December 15, 2018 and interim periods within those fiscal years. Early adoption is permitted. The Company will adopt this guidance January 1, 2019 and will apply the modified retrospective approach. The Company will elect the package of practical expedients that allows an entity to not reassess (i) whether any expired or existing contracts are or contain leases, (ii) lease classification for any expired or existing leases and (iii) initial direct costs for any expired or existing leases.

In January 2016, the FASB issued ASU 2016-01 (Subtopic 825-10), Recognition and Measurement of Financial Assets and Financial Liabilities. The guidance requires entities to measure equity investments that do not result in consolidation and are not accounted for under the equity method at fair value through earnings, to record changes in instrument-specific credit risk for financial liabilities measured under the fair value option in other comprehensive income, use the exit price notion when measuring an instrument’s fair value for disclosure and to separately present financial assets and liabilities by measurement category and form of instrument on the balance sheet or in the notes to the financial statements. The Company adopted the guidance effective January 1, 2018, and it had no impact on the Company’s consolidated financial statements.

In May 2014, the FASB issued a new comprehensive revenue recognition guidance which requires us to recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which we expect to be entitled in exchange for those goods and services (ASU 2014-09). The FASB also issued implementation guidance in March 2016, April 2016 and May 2016 - ASU’s 2016-08, 2016-10 and 2016-12, respectively. The Company adopted this guidance on January 1, 2018. Since the Company’s revenue is related to leasing activities, the adoption of this guidance did not have a material impact on the consolidated financial statements. The new guidance is applicable to service contracts with joint ventures for which the Company earns property management fees, leasing commissions and development and construction fees. The adoption of this new guidance did not change the accounting for these fees as the pattern of recognition of revenue does not change with the new guidance. We will continue to recognize revenue over time on these contracts because the customer simultaneously receives and consumes the benefits provided by our performance.

In February 2017, the FASB issued ASU No. 2017-05 to clarify the scope of asset derecognition guidance in Subtopic 610-20, which also provided guidance on accounting for partial sales of nonfinancial assets.  Subtopic 610-20 was issued in May 2014 as part of ASU 2014-09.  The Company adopted this guidance on January 1, 2018, and applied the modified retrospective approach. The Company elected to adopt the practical expedient under ASC 606, Revenue from Contracts with Customers, which allows an entity to apply the guidance only to contracts with non-customers that are open based on ASU 360-20, Real Estate Sales, (i.e. failed sales) as of the adoption date.   The Company had one open contract in 2017 with a non-customer that was evaluated under ASC 610-20.  The Company entered into an agreement to sell a portion of their interest in an entity that held a controlling interest in the property at 1515 Broadway.  Upon execution of the agreement in 2017, the transaction was evaluated under ASC 360-20, Real Estate Sales, and did not meet the criteria for sale accounting.  Upon adoption of ASC 606, this contract met the criteria for sale accounting under ASC 610-20. Through the sale, the Company no longer retains a controlling interest, as defined in ASC 810, Consolidation, and the impact of this adjustment is a gain of $0.6 billion from the sale of the partial interest and related step-up in basis to fair value of the non-controlling interest retained. This was recorded in the first quarter of 2018 as an adjustment to beginning retained earnings.

XML

Property Acquisitions

12 Months Ended

Dec. 31, 2018

Business Combinations [Abstract]

Property Acquisitions

Property Acquisitions

2018 Acquisitions

During the year ended December 31, 2018, the properties listed below were acquired from third parties.

Property	Acquisition Date	Property Type	Approximate Square Feet		Acquisition Price (in millions)
2 Herald Square(1)	May 2018	Leasehold Interest	369,000		$	266.0
1231 Third Avenue(2)(3)	July 2018	Fee Interest	39,000		55.4
Upper East Side Residential(3)(4)	August 2018	Fee Interest	0.2	acres	30.2
133 Greene Street(2)	October 2018	Fee Interest	6,425		31.0
712 Madison Avenue(2)	December 2018	Fee Interest	6,600		58.0

(1) In May 2018, the Company was the successful bidder for the leasehold interest in 2 Herald Square, at the foreclosure of the asset. In April and May 2017, the Company had purchased, at par, loans in maturity default that were secured by the leasehold interest in 2 Herald Square. At the time the loans were purchased, the Company expected to collect all contractually required payments, including interest. In August 2017, the Company determined that it was probable that the loans would not be repaid in full and therefore, the loans were put on non-accrual status. No impairment was recorded as the Company believed that the fair value of the leasehold exceeded the carrying amount of the loans. In May 2018, the Company was the successful bidder at the foreclosure of the asset. We recorded the assets acquired and liabilities assumed at fair value. This resulted in the recognition of a fair value adjustment of $8.1 million, which is reflected in the Company's consolidated statement of operations within purchase price and other fair value adjustments. See Note 16, "Fair Value Measurements." The Company subsequently sold a 49% interest in the property in November 2018. See Note 4, "Properties Held for Sale and Dispositions." and Note 6, "Investments in Unconsolidated Joint Ventures."

(2) The Company accepted an assignment of the equity interests in the property in lieu of repayment of the Company's debt investment, and recorded the assets received and liabilities assumed at fair value.

(3) This property was subsequently sold in October 2018. See Note 4, "Properties Held for Sale and Dispositions."

(4) In August 2018, the Company acquired the fee interest in three additional land parcels at the Upper East Side Residential Assemblage.

2017 Acquisitions

During the year ended December 31, 2017, we did not acquire any properties from a third party.

2016 Acquisitions

During the year ended December 31, 2016, the property listed below was acquired from a third party. The following summarizes our final allocation of the purchase price of the assets acquired and liabilities assumed upon the closing of this acquisition (in thousands):

	183 Broadway
Acquisition Date	March 2016
Ownership Type	Fee Interest
Property Type	Retail/Residential
Purchase Price Allocation:
Land	$	5,799
Building and building leasehold	23,431
Above-market lease value	—
Acquired in-place leases	773
Other assets, net of other liabilities	20
Assets acquired	30,023
Mark-to-market assumed debt	—
Below-market lease value	(1,523		)
Derivatives	—
Liabilities assumed	(1,523		)
Purchase price	$	28,500
Net consideration funded by us at closing, excluding consideration financed by debt	$	28,500
Equity and/or debt investment held	$	—
Debt assumed	$	—

XML

Properties Held for Sale and Property Dispositions

12 Months Ended

Dec. 31, 2018

Discontinued Operations and Disposal Groups [Abstract]

Properties Held for Sale and Property Dispositions

Properties Held for Sale and Property Dispositions

Properties Held for Sale

As of December 31, 2018, no properties were classified as held for sale.

Property Dispositions

The following table summarizes the properties sold during the years ended December 31, 2018, 2017, and 2016:

Property	Disposition Date	Property Type	Unaudited Approximate Usable Square Feet	Sales Price(1) (in millions)		Gain (Loss) on Sale(2) (in millions)
2 Herald Square(3)	November 2018	Office/Retail	369,000	$	265.0	$	—
400 Summit Lake Drive	November 2018	Land	39.5 acres	3.0		(36.2		)
Upper East Side Assemblage(4)(5)	October 2018	Development	70,142	143.8		(6.3		)
1-6 International Drive	July 2018	Office	540,000	55.0		(2.6		)
635 Madison Avenue	June 2018	Retail	176,530	153.0		(14.1		)
115-117 Stevens Avenue	May 2018	Office	178,000	12.0		(0.7		)
600 Lexington Avenue	January 2018	Office	303,515	305.0		23.8
1515 Broadway (6)	December 2017	Office	1,750,000	1,950.0		—
125 Chubb Way	October 2017	Office	278,000	29.5		(26.1		)
16 Court Street	October 2017	Office	317,600	171.0		64.9
680-750 Washington Boulevard	July 2017	Office	325,000	97.0		(44.2		)
520 White Plains Road	April 2017	Office	180,000	21.0		(14.6		)
102 Greene Street (7)	April 2017	Retail	9,200	43.5		4.9
400 East 57th Street	October 2016	Residential	290,482	83.3		23.9
11 Madison Avenue (8)	August 2016	Office	2,314,000	2,605.0		3.6
500 West Putnam	July 2016	Office	121,500	41.0		(10.4		)
388 Greenwich	June 2016	Office	2,635,000	2,002.3		206.5
7 International Drive	May 2016	Land	31 Acres	20.0		(6.9		)
248-252 Bedford Avenue	February 2016	Residential	66,611	55.0		15.3
885 Third Avenue (9)	February 2016	Leased Fee Interest	607,000	453.0		(8.8		)

(1) Sales price represents the actual sales price for an entire property or the gross asset valuation for interests in a property.

(2) The gain on sale for 600 Lexington, 16 Court Street, 102 Greene Street, 400 East 57th Street, 11 Madison Avenue, 388 Greenwich, and 248-252 Bedford Avenue are net of $1.3 million, $2.5 million, $0.9 million, $1.0 million, $0.6 million, $1.6 million, and $1.3 million in employee compensation accrued in connection with the realization of these investment gains. Additionally, amounts do not include adjustments for expenses recorded in subsequent periods.

(3) In November 2018, the company sold a 49% interest in 2 Herald Square to an Israeli institutional investor. See Note 6, "Investments in Unconsolidated Joint Ventures."

(4) Upper East Side Assemblage consists of 260 East 72nd Street, 31,076 square feet of development rights, 252-254 East 72nd Street, 257 East 71st Street, 259 East 71st Street, and 1231 Third Avenue.

(5) The Company recorded a $5.8 million charge in 2018 that is included in depreciable real estate reserves and impairment in the consolidated statement of operations.

(6) In November 2017, the Company sold a 30.13% interest in 1515 Broadway to affiliates of Allianz Real Estate. At that time, the sale did not meet the criteria for sale accounting and as a result the property was accounted for under the profit sharing method. The Company achieved sale accounting upon adoption of ASC 610-20 in January 2018 and closed on the sale of an additional 12.87% interest in the property to Allianz in February 2018. See Note 6, "Investments in Unconsolidated Joint Ventures."

(7) In April 2017, we closed on the sale of a 90% interest 102 Greene Street and had subsequently accounted for our interest in the property as an investment in unconsolidated joint ventures. We sold the remaining 10% interest in September 2017. See Note 6, "Investments in Unconsolidated Joint Ventures."

(8) In August 2016, we sold a 40% interest in 11 Madison Avenue. At that time, the sale did not meet the criteria for sale accounting and, as a result, the property was accounted for under the profit sharing method. In November 2016, the Company obtained consent to the modifications to the mortgage on the property, which resulted in the Company achieving sale accounting on the transaction. See Note 6, "Investments in Unconsolidated Joint Ventures."

(9) In February 2016, we closed on the sale of 885 Third Avenue. At that time, the sale did not meet the criteria for sale accounting and as a result the property remained on our consolidated financial statements until the criteria was met in April 2017.

XML

Debt and Preferred Equity Investments

12 Months Ended

Dec. 31, 2018

Investments, Debt and Equity Securities [Abstract]

Debt and Preferred Equity Investments

Debt and Preferred Equity Investments

Below is a summary of the activity relating to our debt and preferred equity investments as of December 31, 2018 and 2017 (in thousands):

	December 31, 2018			December 31, 2017
Balance at beginning of period (1)	$	2,114,041		$	1,640,412
Debt investment originations/accretion (2)	834,304			1,142,591
Preferred equity investment originations/accretion (2)	151,704			144,456
Redemptions/sales/syndications/amortization (3)	(994,906		)	(813,418		)
Net change in loan loss reserves	(5,750		)	—
Balance at end of period (1)	$	2,099,393		$	2,114,041

(1) Net of unamortized fees, discounts, and premiums.

(2) Accretion includes amortization of fees and discounts and paid-in-kind investment income.

(3) Certain participations in debt investments that were sold or syndicated did not meet the conditions for sale accounting and are included in other assets and other liabilities on the consolidated balance sheets.

The following table is a rollforward of our total loan loss reserves at December 31, 2018, 2017 and 2016 (in thousands):

	December 31,
	2018			2017		2016
Balance at beginning of year	$	—		$	—	$	—
Expensed	6,839			—		—
Recoveries	—			—		—
Charge-offs and reclassifications	(1,089		)	—		—
Balance at end of period	$	5,750		$	—	$	—

At December 31, 2018, all debt and preferred equity investments were performing in accordance with the terms of the relevant investments. At December 31, 2018 the Company's loan loss reserves of $5.8 million were attributable to two investments with an unpaid principal balance of $159.9 million that are being marketed for sale, are performing in accordance with their respective terms, and were not put on nonaccrual.

At December 31, 2017, all debt and preferred equity investments were performing in accordance with the terms of the relevant investments, with the exception of our investment in 2 Herald Square which was purchased in maturity default in May 2017 and April 2017, respectively, for which we subsequently were the successful bidder for the leasehold interest at the foreclosure of the asset as discussed in Note 3, "Property Acquisitions," and a junior mortgage participation acquired in September 2014, which was acquired for zero, had a carrying value of zero and was canceled in 2018.

We have determined that we have one portfolio segment of financing receivables at December 31, 2018 and 2017 comprising commercial real estate which is primarily recorded in debt and preferred equity investments. Included in other assets is an additional amount of financing receivables totaling $88.8 million and $65.5 million at December 31, 2018 and 2017, respectively. No financing receivables were 90 days past due at December 31, 2018 with the exception of a $28.4 million financing receivable which was put on nonaccrual in August as a result of interest default. The loan was evaluated in accordance with our loan review procedures and the Company concluded that the fair value of the collateral exceeded the carrying amount of the loan.

As of December 31, 2018, Management estimated the weighted average risk rating for our debt and preferred equity investments to be 1.2.

Debt Investments

As of December 31, 2018 and 2017, we held the following debt investments with an aggregate weighted average current yield of 8.99%, at December 31, 2018 (in thousands):

Loan Type	December 31, 2018 Future Funding Obligations		December 31, 2018 Senior Financing		December 31, 2018 Carrying Value (1)		December 31, 2017 Carrying Value (1)		Maturity Date (2)
Fixed Rate Investments:
Mezzanine Loan(3a)	$	—	$	1,160,000	$	213,185	$	204,005	March 2020
Mezzanine Loan	—		15,000		3,500		3,500		September 2021
Mezzanine Loan	—		147,000		24,932		24,913		April 2022
Mezzanine Loan	—		280,000		36,585		34,600		August 2022
Mezzanine Loan	—		85,097		12,706		12,699		November 2023
Mezzanine Loan	—		180,000		30,000		—		December 2023
Mezzanine Loan(3b)	—		115,000		12,941		12,932		June 2024
Mezzanine Loan	—		95,000		30,000		30,000		January 2025
Mezzanine Loan	—		340,000		11,000		15,000		November 2026
Mezzanine Loan	—		1,712,750		55,250		55,250		June 2027
Mortgage/Jr. Mortgage Loan(4)	—		—		—		250,464
Mortgage Loan(5)	—		—		—		26,366
Mortgage Loan(5)	—		—		—		239
Total fixed rate	$	—	$	4,129,847	$	430,099	$	669,968
Floating Rate Investments:
Mezzanine Loan(6)	$	—	$	45,025	$	37,499	$	34,879	January 2019
Mezzanine Loan(3c)(7)	—		85,000		15,333		15,381		March 2019
Mezzanine Loan(3d)(7)	—		65,000		14,822		14,869		March 2019
Mezzanine Loan(8)	—		38,000		21,990		21,939		March 2019
Mezzanine Loan(7)	—		40,000		19,986		19,982		April 2019
Mezzanine Loan	—		265,000		24,961		24,830		April 2019
Mortgage/Jr. Mortgage Participation Loan	40,530		233,086		84,012		71,832		August 2019
Mezzanine Loan(7)(8)	—		65,000		14,998		14,955		August 2019
Mortgage/Mezzanine Loan(7)	—		—		19,999		19,940		August 2019
Mortgage/Mezzanine Loan	1,027		—		154,070		143,919		September 2019
Mezzanine Loan	—		350,000		34,886		34,737		October 2019
Mortgage/Mezzanine Loan(9)	7,243		—		62,493		43,845		January 2020
Mezzanine Loan(9)	559		575,955		79,164		75,834		January 2020
Mortgage Loan	11,204		—		88,501		—		February 2020
Mezzanine Loan	1,277		322,300		53,402		—		March 2020
Mortgage/Mezzanine Loan	14,860		—		277,694		—		April 2020
Mortgage/Mezzanine Loan(7)	—		—		37,094		—		June 2020
Mezzanine Loan	7,887		38,167		12,627		11,259		July 2020
Mortgage/Mezzanine Loan	—		—		83,449		—		October 2020
Mezzanine Loan	38,575		362,908		88,817		75,428		November 2020
Mortgage/Mezzanine Loan	33,131		—		98,804		88,989		December 2020
Mortgage/Mezzanine Loan	—		—		35,266		35,152		December 2020
Jr. Mortgage Participation/Mezzanine Loan	—		60,000		15,665		15,635		July 2021
Mezzanine Loan(8)	—		38,596		7,305		34,947		December 2021
Mortgage/Mezzanine Loan (5)	—		—		—		162,553
Mortgage/Mezzanine Loan (5)	—		—		—		74,755
Mortgage/Mezzanine Loan (10)	—		—		—		23,609

Loan Type	December 31, 2018 Future Funding Obligations		December 31, 2018 Senior Financing		December 31, 2018 Carrying Value (1)		December 31, 2017 Carrying Value (1)		Maturity Date (2)
Mortgage/Mezzanine Loan(5)	—		—		—		16,969
Mezzanine Loan(5)	—		—		—		59,723
Mezzanine Loan(5)	—		—		—		37,851
Mezzanine Loan(5)	—		—		—		14,855
Mezzanine Loan(11)	—		—		—		12,174
Mezzanine Loan(11)	—		—		—		10,934
Mezzanine Loan(5)	—		—		—		37,250
Mezzanine Loan(5)	—		—		—		15,148
Mezzanine Loan(5)	—		—		—		8,550
Mezzanine Loan(11)	—		—		—		26,927
Total floating rate	$	156,293	$	2,584,037	$	1,382,837	$	1,299,650
Total	$	156,293	$	6,713,884	$	1,812,936	$	1,969,618

(1) Carrying value is net of discounts, premiums, original issue discounts and deferred origination fees.

(2) Represents contractual maturity, excluding any unexercised extension options.

(3) Carrying value is net of the following amounts that were sold or syndicated, which are included in other assets and other liabilities on the consolidated balance sheets as a result of the transfers not meeting the conditions for sale accounting: (a) $1.3 million, (b) $12.0 million, (c) $14.6 million, and (d) $14.1 million.

(4) These loans were purchased at par in April and May 2017 and were in maturity default at the time of acquisition. At the time the loans were purchased, the Company expected to collect all contractually required payments, including interest. In August 2017, the Company determined that it was probable that the loans would not be repaid in full and therefore, the loans were put on non-accrual status. No impairment was recorded as the Company believed that the fair value of the property exceeded the carrying amount of the loans. In May 2018, the Company was the successful bidder at the foreclosure of the asset, at which time the loans were credited to our equity investment in the property.

(5) This loan was repaid in 2018.

(6) As of January 2019, this loan is in maturity default. No impairment was recorded as the Company believes that the fair value of the property exceeded the carrying amount of the loans.

(7) This loan was extended in 2018.

(8) This loan was repaid in 2019.

(9) This loan was modified in 2019.

(10) This loan was sold in 2018.

(11) In 2018, the Company accepted an assignment of the equity interests in the property in lieu of repayment of the loan, and recorded the assets received and liabilities assumed at fair value.

Preferred Equity Investments

As of December 31, 2018 and 2017, we held the following preferred equity investments with an aggregate weighted average current yield of 9.12% at December 31, 2018 (in thousands):

Type	December 31, 2018 Future Funding Obligations		December 31, 2018 Senior Financing		December 31, 2018 Carrying Value (1)		December 31, 2017 Carrying Value (1)		Mandatory Redemption (2)
Preferred Equity(3)	$	—	$	272,000	$	143,183	$	144,423	April 2021
Preferred Equity	—		1,768,000		143,274		—		June 2022
	$	—	$	2,040,000	$	286,457	$	144,423

(1) Carrying value is net of deferred origination fees.

(2) Represents contractual maturity, excluding any unexercised extension options.

(3) In February 2016, we closed on the sale of 885 Third Avenue and retained a preferred equity position in the property. The sale did not meet the criteria for sale accounting under the full accrual method in ASC 360-20, Property, Plant and Equipment - Real Estate Sales. As a result the property remained on our consolidated balance sheet until the criteria was met in April 2017 at which time the property was deconsolidated and the preferred equity investment was recognized.

XML

Investments in Unconsolidated Joint Ventures

12 Months Ended

Dec. 31, 2018

Equity Method Investments and Joint Ventures [Abstract]

Investments in Unconsolidated Joint Ventures

Investments in Unconsolidated Joint Ventures

We have investments in several real estate joint ventures with various partners. As of December 31, 2018, the book value of these investments was $3.0 billion, net of investments with negative book values totaling $85.8 million for which we have an implicit commitment to fund future capital needs.

As of December 31, 2018 and December 31, 2017, 800 Third Avenue, 21 East 66th Street, 605 West 42nd Street, 333 East 22nd Street, One Vanderbilt and certain properties within the Stonehenge Portfolio are VIEs in which we are not the primary beneficiary. Our net equity investment in these VIEs was $808.3 million as of December 31, 2018 and $606.2 million as of December 31, 2017. Our maximum loss is limited to the amount of our equity investment in these VIEs. See the "Principles of Consolidation" section of Note 2, "Significant Accounting Policies". All other investments below are voting interest entities. As we do not control the joint ventures listed below, we account for them under the equity method of accounting.

The table below provides general information on each of our joint ventures as of December 31, 2018:

Property	Partner	Ownership Interest (1)	Economic Interest (1)	Unaudited Approximate Square Feet	Acquisition Date (2)	Acquisition Price(2) (in thousands)
100 Park Avenue	Prudential Real Estate Investors	49.90%	49.90%	834,000	February 2000	$	95,800
717 Fifth Avenue	Jeff Sutton/Private Investor	10.92%	10.92%	119,500	September 2006	251,900
800 Third Avenue	Private Investors	60.52%	60.52%	526,000	December 2006	285,000
919 Third Avenue(3)	New York State Teacher's Retirement System	51.00%	51.00%	1,454,000	January 2007	1,256,727
11 West 34th Street	Private Investor/ Jeff Sutton	30.00%	30.00%	17,150	December 2010	10,800
280 Park Avenue	Vornado Realty Trust	50.00%	50.00%	1,219,158	March 2011	400,000
1552-1560 Broadway(4)	Jeff Sutton	50.00%	50.00%	57,718	August 2011	136,550
10 East 53rd Street	Canadian Pension Plan Investment Board	55.00%	55.00%	354,300	February 2012	252,500
521 Fifth Avenue	Plaza Global Real Estate Partners LP	50.50%	50.50%	460,000	November 2012	315,000
21 East 66th Street(5)	Private Investors	32.28%	32.28%	13,069	December 2012	75,000
650 Fifth Avenue(6)	Jeff Sutton	50.00%	50.00%	69,214	November 2013	—
121 Greene Street	Jeff Sutton	50.00%	50.00%	7,131	September 2014	27,400
55 West 46th Street	Prudential Real Estate Investors	25.00%	25.00%	347,000	November 2014	295,000
Stonehenge Portfolio(7)	Various	Various	Various	1,439,016	February 2015	36,668
131-137 Spring Street(8)	Invesco Real Estate	20.00%	20.00%	68,342	August 2015	277,750
605 West 42nd Street	The Moinian Group	20.00%	20.00%	927,358	April 2016	759,000
11 Madison Avenue	PGIM Real Estate	60.00%	60.00%	2,314,000	August 2016	2,605,000
333 East 22nd Street	Private Investors	33.33%	33.33%	26,926	August 2016	—
400 East 57th Street(9)	BlackRock, Inc and Stonehenge Partners	51.00%	41.00%	290,482	October 2016	170,000
One Vanderbilt(10)	National Pension Service of Korea/Hines Interest LP	71.01%	71.01%	—	January 2017	3,310,000
Worldwide Plaza	RXR Realty / New York REIT / Private Investor	24.35%	24.35%	2,048,725	October 2017	1,725,000
1515 Broadway(11)	Allianz Real Estate of America	56.87%	56.87%	1,750,000	November 2017	1,950,000
2 Herald Square	Israeli Institutional Investor	51.00%	51.00%	369,000	November 2018	266,000

(1) Ownership interest and economic interest represent the Company's interests in the joint venture as of December 31, 2018. Changes in ownership or economic interests within the current year are disclosed in the notes below.

(2) Acquisition date and price represent the date on which the Company initially acquired an interest in the joint venture and the actual or implied gross purchase price for the joint venture on that date. Acquisition date and price are not adjusted for subsequent acquisitions or dispositions of interest.

(3) In January 2018, the partnership agreement for our investment was modified resulting in the Company no longer having a controlling interest in this investment. As a result the investment was deconsolidated as of January 1, 2018. The Company recorded its non-controlling interest at fair value resulting in a $49.3 million fair value adjustment in the consolidated statement of operations. This fair value was allocated to the assets and liabilities, including identified intangibles of the property.

(4) The purchase price represents only the purchase of the 1552 Broadway interest which comprised approximately 13,045 square feet. The joint venture also owns a long-term leasehold interest in the retail space and certain other spaces at 1560 Broadway, which is adjacent to 1552 Broadway.

(5) We hold a 32.28% interest in three retail and two residential units at the property and a 16.14% interest in three residential units at the property.

(6) The joint venture owns a long-term leasehold interest in the retail space at 650 Fifth Avenue. In connection with the ground lease obligation, SLG provided a performance guaranty and our joint venture partner executed a contribution agreement to reflect its pro rata obligation. In the event the property is converted into a condominium unit and the landlord elects the purchase option, the joint venture shall be obligated to acquire the unit at the then fair value.

(7) In February and March 2018, the Company, together with its joint venture partner, closed on the sale of two properties from the Stonehenge Portfolio. These sales are further described under Sale of Joint Venture Interest of Properties below.

(8) In January 2019, we closed on the sale of our interest in this property to our joint venture partner. The transaction generated net cash proceeds to the Company of $15.2 million.

(9) In October 2016, the Company sold a 49% interest in this property to an investment account managed by BlackRock, Inc. The Company's interest in the property was sold within a consolidated joint venture owned 90% by the Company and 10% by Stonehenge. The transaction resulted in the deconsolidation of the venture's remaining 51% interest in the property. The Company's joint venture with Stonehenge remains consolidated resulting in the combined 51% interest being shown within investments in unconsolidated joint ventures on the Company's balance sheet.

(10) The partners have committed aggregate equity to the project totaling no less than $525 million and their ownership interest in the joint venture is based on their capital contributions, up to an aggregate maximum of 29.0%. At December 31, 2018 the total of the two partners' ownership interests based on equity contributed was 23.4%.

(11) In November 2017, the Company sold a 30% interest in 1515 Broadway to affiliates of Allianz Real Estate. The sale did not meet the criteria for sale accounting and as a result the property was accounted for under the profit sharing method at December 31, 2017. The Company achieved sale accounting upon adoption of ASC 610-20 in January 2018 and recorded a $0.6 billion gain from the sale of the partial interest and related step-up in basis to fair value of the retained non-controlling interest as an adjustment to beginning retained earnings based on the application of the modified retrospective adoption approach. The Company closed on the sale of an additional 13% interest in the property to Allianz in February 2018.

Acquisition, Development and Construction Arrangements

Based on the characteristics of the following arrangements, which are similar to those of an investment, combined with the expected residual profit of not greater than 50%, we have accounted for these debt and preferred equity investments under the equity method. As of December 31, 2018 and 2017, the carrying value for acquisition, development and construction arrangements were as follows (in thousands):

Loan Type	December 31, 2018		December 31, 2017		Maturity Date
Mezzanine Loan(1)	$	44,357	44,823		February 2022
Mezzanine Loan and Preferred Equity (2)	—		100,000
Mezzanine Loan(3)	—		26,716
	$	44,357	$	171,539

(1) We have an option to convert our loan to an equity interest subject to certain conditions. We have determined that our option to convert the loan to equity is not a derivative financial instrument pursuant to GAAP.

(2) The mezzanine loan was repaid and the preferred equity interest was redeemed in March 2018.

(3) The Company was redeemed on this investment in July 2018.

Disposition of Joint Venture Interests or Properties

The following table summarizes the investments in unconsolidated joint ventures sold during the years ended December 31, 2018, 2017, and 2016:

Property	Ownership Interest Sold	Disposition Date	Type of Sale	Gross Asset Valuation (in thousands)(1)		Gain (Loss) on Sale (in thousands)(2)
3 Columbus Circle	48.90%	November 2018	Ownership Interest	$	851,000	$	160,368
Mezzanine Loan(3)	33.33%	August 2018	Repayment	15,000		N/A
724 Fifth Avenue	49.90%	July 2018	Ownership Interest	365,000		64,587
Jericho Plaza(4)	11.67%	June 2018	Ownership Interest	117,400		147
1745 Broadway	56.87%	May 2018	Property	633,000		52,038
175-225 Third Street Brooklyn, New York	95.00%	April 2018	Property	115,000		19,483
Stonehenge Village(5)	0.50%	March 2018	Property	287,000		(5,701		)
1515 Broadway(6)	13.00%	February 2018	Ownership Interest	1,950,000		—
1274 Fifth Avenue(5)	9.83%	February 2018	Property	44,100		(362		)
102 Greene Street	10.00%	September 2017	Ownership Interest	43,500		283
76 11th Avenue(7)	33.33%	May 2017	Repayment	138,240		N/A
Stonehenge Portfolio (partial)(6)	Various	March 2017	Ownership Interest	300,000		871
EOP Denver	0.48%	September 2016	Ownership Interest	180,700		300
33 Beekman (8)	45.90%	May 2016	Property	196,000		33,000
EOP Denver	4.79%	March 2016	Ownership Interest	180,700		2,800
7 Renaissance Square	50.00%	March 2016	Property	20,700		4,200
Jericho Plaza (4)	66.11%	February 2016	Ownership Interest	95,200		3,300

(1) Represents implied gross valuation for the joint venture or sales price of the property.

(2) Represents the Company's share of the gain or loss. The gain on sale is net of $11.7 million, $0, and $1.1 million of employee compensation accrued in connection with the realization of these investment gains in the years ended December 31, 2018, 2017, and 2016, respectively. Additionally, gain (loss) amounts do not include adjustments for expenses recorded in subsequent periods.

(3) Our investment in a joint venture that owned a mezzanine loan secured by a commercial property in midtown Manhattan was repaid after the joint venture received repayment of the underlying loan.

(4) We sold our 11.67% interest in June 2018. In the first quarter of 2016, our ownership percentage was reduced from 77.78% to 11.67%, upon completion of a restructuring of the joint venture.

(5) Properties were part of the Stonehenge Portfolio.

(6) Our investment in 1515 Broadway was marked to fair value on January 1, 2018 upon adoption of ASC 610-20.

(7) Our investment in a joint venture that owned two mezzanine notes secured by interests in the entity that owns 76 11th Avenue was repaid after the joint venture received repayment of the underlying loans.

(8) In connection with the sale of the property, we also recognized a promote of $10.8 million.

In May 2017, we recognized a gain of $13.0 million related to the sale in May 2014 of our ownership interest in 747 Madison Avenue. The sale did not meet the criteria for sale accounting at that time and, therefore, remained on our consolidated financial statements. The sale criteria was met in May of 2017 resulting in recognition of the deferred gain on the sale.

Joint Venture Mortgages and Other Loans Payable

We generally finance our joint ventures with non-recourse debt. In certain cases we may provide guarantees or master leases for tenant space, which terminate upon the satisfaction of specified circumstances or repayment of the underlying loans. The first mortgage notes and other loans payable collateralized by the respective joint venture properties and assignment of leases at December 31, 2018 and 2017, respectively, are as follows (amounts in thousands):

Property	Economic Interest (1)		Maturity Date	Interest Rate (2)		December 31, 2018			December 31, 2017
Fixed Rate Debt:
521 Fifth Avenue	50.50	%	November 2019		3.73%	$	170,000		$	170,000
717 Fifth Avenue (3)	10.92	%	July 2022		4.45%	300,000			300,000
717 Fifth Avenue (3)	10.92	%	July 2022		5.50%	355,328			355,328
650 Fifth Avenue (4)	50.00	%	October 2022		4.46%	210,000			210,000
650 Fifth Avenue (4)	50.00	%	October 2022		5.45%	65,000			65,000
21 East 66th Street	32.28	%	April 2023		3.60%	12,000			12,000
919 Third Avenue	51.00	%	June 2023		5.12%	500,000			—
1515 Broadway	56.87	%	March 2025		3.93%	855,876			872,528
11 Madison Avenue	60.00	%	September 2025		3.84%	1,400,000			1,400,000
800 Third Avenue	60.52	%	February 2026		3.37%	177,000			177,000
400 East 57th Street	41.00	%	November 2026		3.00%	99,828			100,000
Worldwide Plaza	24.35	%	November 2027		3.98%	1,200,000			1,200,000
Stonehenge Portfolio (5)	Various		Various		4.20%	321,076			357,282
3 Columbus Circle (6)						—			350,000
Total fixed rate debt						$	5,666,108		$	5,569,138
Floating Rate Debt:
280 Park Avenue	50.00	%	September 2019	L+	1.73%	$	1,200,000		$	1,200,000
121 Greene Street	50.00	%	November 2019	L+	1.50%	15,000			15,000
10 East 53rd Street	55.00	%	February 2020	L+	2.25%	170,000			170,000
131-137 Spring Street (7)	20.00	%	August 2020	L+	1.55%	141,000			141,000
1552 Broadway	50.00	%	October 2020	L+	2.65%	195,000			195,000
55 West 46th Street (8)	25.00	%	November 2020	L+	2.13%	185,569			171,444
11 West 34th Street	30.00	%	January 2021	L+	1.45%	23,000			23,000
103 East 86th Street (9)	1.00	%	January 2021	L+	1.40%	38,000			55,340
100 Park Avenue	49.90	%	February 2021	L+	1.75%	360,000			360,000
One Vanderbilt (10)	71.01	%	September 2021	L+	2.75%	375,000			355,535
2 Herald Square (11)	51.00	%	November 2021	L+	1.55%	133,565			—
605 West 42nd Street	20.00	%	August 2027	L+	1.44%	550,000			550,000
21 East 66th Street	32.28	%	June 2033	1 Year Treasury+	2.75%	1,571			1,648
175-225 Third Street Brooklyn, New York (12)						—			40,000
1745 Broadway (12)						—			345,000
Jericho Plaza (13)						—			81,099
724 Fifth Avenue (14)						—			275,000
Total floating rate debt						$	3,387,705		$	3,979,066
Total joint venture mortgages and other loans payable						$	9,053,813		$	9,548,204
Deferred financing costs, net						(103,191		)	(136,103		)
Total joint venture mortgages and other loans payable, net						$	8,950,622		$	9,412,101

(1) Economic interest represents the Company's interests in the joint venture as of December 31, 2018. Changes in ownership or economic interests, if any, within the current year are disclosed in the notes to the investment in unconsolidated joint ventures table above.

(2) Interest rate as of December 31, 2018, taking into account interest rate hedges in effect during the period. Floating rate debt is presented with the stated interest rate spread over 30-day LIBOR, unless otherwise specified.

(3) These loans are comprised of a $300.0 million fixed rate mortgage loan and $355.3 million mezzanine loan. The mezzanine loan is subject to accretion based on the difference between contractual interest rate and contractual pay rate.

(4) These loans are comprised of a $210.0 million fixed rate mortgage loan and $65.0 million fixed rate mezzanine loan.

(5) Amount is comprised of $134.3 million, $54.1 million, and $132.6 million in fixed-rated mortgages that mature in August 2019, June 2024, and April 2028, respectively.

(6) In November 2018, we closed on the sale of our interest in the property to our joint venture partner.

(7) In January 2019, we closed on the sale of our interest in this property to our joint venture partner.

(8) This loan has a committed amount of $195.0 million, of which $9.4 million was unfunded as of December 31, 2018.

(9) In February 2019, along with our joint venture partner, we closed on the sale of the property.

(10) This loan is a $1.75 billion construction facility, with reductions in interest cost based on meeting certain conditions, and has an initial five-year term with twoone-year extension options. Advances under the loan are subject to incurred costs, funded equity, loan to value thresholds, and entering into construction contracts.

(11) This loan has a committed amount of $150.0 million.

(12) In 2018, along with our joint venture partner, we closed on the sale of the property.

(13) In 2018, we closed on the sale of our interest in the property.

(14) In 2018, we closed on the sale of substantially all of our interest in the property to our joint venture partner.

We act as the operating partner and day-to-day manager for all our joint ventures, except for Worldwide Plaza, 800 Third Avenue, 280 Park Avenue, 21 East 66th Street, 605 West 42nd Street, 400 East 57th Street, and the Stonehenge Portfolio. We are entitled to receive fees for providing management, leasing, construction supervision and asset management services to certain of our joint ventures. We earned $14.2 million, $22.6 million and $4.0 million from these services, net of our ownership share of the joint ventures, for the years ended December 31, 2018, 2017, and 2016, respectively. In addition, we have the ability to earn incentive fees based on the ultimate financial performance of certain of the joint venture properties.

The combined balance sheets for the unconsolidated joint ventures, at December 31, 2018 and 2017, are as follows (in thousands):

	December 31, 2018		December 31, 2017
Assets (1)
Commercial real estate property, net	$	14,347,673	$	12,822,133
Cash and restricted cash	381,301		494,909
Tenant and other receivables, related party receivables, and deferred rents receivable, net of allowance	273,141		349,944
Debt and preferred equity investments, net	44,357		202,539
Other assets	2,187,166		1,407,806
Total assets	$	17,233,638	$	15,277,331
Liabilities and equity (1)
Mortgages and other loans payable, net	$	8,950,622	$	9,412,101
Deferred revenue/gain	1,660,838		985,648
Other liabilities	946,313		411,053
Equity	5,675,865		4,468,529
Total liabilities and equity	$	17,233,638	$	15,277,331
Company's investments in unconsolidated joint ventures	$	3,019,020	$	2,362,989

(1) The combined assets, liabilities and equity for the unconsolidated joint ventures reflects the effect of step ups in basis on the retained non-controlling interests in deconsolidated investments as a result of the adoption of ASC 610-20 in January 2018.

The combined statements of operations for the unconsolidated joint ventures, from acquisition date through the years ended December 31, 2018, 2017, and 2016 are as follows (in thousands):

	Year Ended December 31,
	2018			2017			2016
Total revenues	$	1,244,804		$	904,230		$	712,689
Operating expenses	219,440			157,610			126,913
Real estate taxes	226,961			142,774			111,673
Ground rent	18,697			16,794			14,924
Interest expense, net of interest income	363,055			250,063			197,741
Amortization of deferred financing costs	21,634			23,026			24,829
Transaction related costs	—			146			5,566
Depreciation and amortization	421,458			279,419			199,011
Total expenses	$	1,271,245		$	869,832		$	680,657
Loss on early extinguishment of debt	—			(7,899		)	(1,606		)
Net (loss) income before gain on sale (1)	$	(26,441	)	$	26,499		$	30,426
Company's equity in net income from unconsolidated joint ventures (1)	$	7,311		$	21,892		$	11,874

(1) The combined statements of operations and the Company's equity in net income for the unconsolidated joint ventures reflects the effect of step ups in basis on the retained non-controlling interests in deconsolidated investments as a result of the adoption of ASC 610-20 in January 2018.

XML

Deferred Costs

12 Months Ended

Dec. 31, 2018

Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]

Deferred Costs

Deferred Costs

Deferred costs at December 31, 2018 and 2017 consisted of the following (in thousands):

	December 31,
	2018			2017
Deferred leasing costs	$	453,833		$	443,341
Less: accumulated amortization	(244,723		)	(217,140		)
Deferred costs, net	$	209,110		$	226,201

XML

Mortgages and Other Loans Payable

12 Months Ended

Dec. 31, 2018

Mortgages and Other Loans Payable

Mortgages and Other Loans Payable

Mortgages and Other Loans Payable

The first mortgages and other loans payable collateralized by the respective properties and assignment of leases or debt investments at December 31, 2018 and 2017, respectively, were as follows (amounts in thousands):

Property	Maturity Date	Interest Rate (1)		December 31, 2018			December 31, 2017
Fixed Rate Debt:
762 Madison Avenue	February 2022		5.00%	771			771
100 Church Street	July 2022		4.68%	213,208			217,273
420 Lexington Avenue	October 2024		3.99%	300,000			300,000
400 East 58th Street (2)	November 2026		3.00%	39,931			40,000
Landmark Square	January 2027		4.90%	100,000			100,000
485 Lexington Avenue	February 2027		4.25%	450,000			450,000
1080 Amsterdam (3)	February 2027		3.58%	35,807			36,363
315 West 33rd Street	February 2027		4.17%	250,000			250,000
919 Third Avenue (4)				—			500,000
Unsecured Loan (5)				—			16,000
Series J Preferred Units (6)				—			4,000
One Madison Avenue (7)				—			486,153
Total fixed rate debt				$	1,389,717		$	2,400,560
Floating Rate Debt:
FHLB Facility	May 2019	L+	0.27%	$	13,000		$	—
2017 Master Repurchase Agreement	June 2019	L+	2.34%	300,000			90,809
FHLB Facility	December 2019	L+	0.18%	14,500			—
133 Greene Street	August 2020	L+	2.00%	15,523			—
185 Broadway (8)	November 2021	L+	2.85%	111,869			58,000
712 Madison	December 2021	L+	2.50%	28,000			—
115 Spring Street	September 2023	L+	3.40%	65,550			—
719 Seventh Avenue	September 2023	L+	1.20%	50,000			41,622
220 East 42nd Street (9)				—			275,000
Total floating rate debt				$	598,442		$	465,431
Total fixed rate and floating rate debt				$	1,988,159		$	2,865,991
Mortgages reclassed to liabilities related to assets held for sale				—			—
Total mortgages and other loans payable				$	1,988,159		$	2,865,991
Deferred financing costs, net of amortization				(26,919		)	(28,709		)
Total mortgages and other loans payable, net				$	1,961,240		$	2,837,282

(1) Interest rate as of December 31, 2018, taking into account interest rate hedges in effect during the period. Floating rate debt is presented with the stated interest rate spread over 30-day LIBOR, unless otherwise specified.

(2) The loan carries a fixed interest rate of 300 basis points for the first five years and is prepayable without penalty at the end of year five.

(3) The loan is comprised of a $35.5 million mortgage loan and $0.9 million subordinate loan with a fixed interest rate of 350 basis points and 700 basis points, respectively, for the first five years and is prepayable without penalty at the end of year five.

(4) Our investment in the property was deconsolidated as of January 1, 2018. See Note 6, "Investments in Unconsolidated Joint Ventures".

(5) In May 2018, the loan was repaid in connection with the sale of the property.

(6) In June 2018, the Series J Preferred Units were redeemed in connection with the sale of the property.

(7) In 2018, the Company recognized a $14.9 million loss on extinguishment of debt related to the early repayment of this loan.

(8) This loan is a $225.0 million construction facility, with reductions in interest cost based on meeting certain conditions, and has an initial three-year term with twoone-year extension options. Advances under the loan are subject to incurred costs and funded equity requirements.

(9) In 2018, the mortgage was repaid.

At December 31, 2018 and 2017, the gross book value of the properties and debt and preferred equity investments collateralizing the mortgages and other loans payable, not including assets held for sale, was approximately $3.9 billion and $4.8 billion, respectively.

Federal Home Loan Bank of New York Facility

The Company’s wholly-owned subsidiary, Ticonderoga Insurance Company, or Ticonderoga, a Vermont licensed captive insurance company, is a member of the Federal Home Loan Bank of New York, or FHLBNY. As a member, Ticonderoga may borrow funds from the FHLBNY in the form of secured advances. As of December 31, 2018, we had $13.0 million and $14.5 million in outstanding secured advances with a borrowing rate of 30-day LIBOR over 27 basis points and 30-day LIBOR over 18 basis points, respectively.

Master Repurchase Agreements

The Company has entered into two Master Repurchase Agreements, or MRAs, known as the 2016 MRA and 2017 MRA, which provide us with the ability to sell certain debt investments with a simultaneous agreement to repurchase the same at a certain date or on demand. We seek to mitigate risks associated with our repurchase agreement by managing the credit quality of our assets, early repayments, interest rate volatility, liquidity, and market value. The margin call provisions under our repurchase facilities permit valuation adjustments based on capital markets activity, and are not limited to collateral-specific credit marks. To monitor credit risk associated with our debt investments, our asset management team regularly reviews our investment portfolio and is in contact with our borrowers in order to monitor the collateral and enforce our rights as necessary. The risk associated with potential margin calls is further mitigated by our ability to recollateralize the facility with additional assets from our portfolio of debt investments, our ability to satisfy margin calls with cash or cash equivalents and our access to additional liquidity through the 2017 credit facility, as defined below.

In June 2017, we entered into the 2017 MRA, with a maximum facility capacity of $300.0 million. In April 2018, we increased the maximum facility capacity to $400.0 million. The facility bears interest on a floating rate basis at a spread to 30-day LIBOR based on the pledged collateral and advance rate and has an initial one year term, with twoone year extension options. In June 2018, we exercised a one year extension option. At December 31, 2018, the facility had a carrying value of $299.6 million, net of deferred financing costs.

In July 2016, we entered into a restated 2016 MRA, with a maximum facility capacity of $300.0 million. In June 2018, we terminated the restated 2016 MRA. The facility bore interest ranging from 225 and 400 basis points over 30-day LIBOR depending on the pledged collateral and had an initial two-year term, with a one year extension option. Since December 6, 2015, we had been required to pay monthly in arrears a 25 basis point fee on the excess of $150.0 million over the average daily balance during the period when the average daily balance was less than $150.0 million.

Corporate Indebtedness

2017 Credit Facility

In November 2017, we entered into an amendment to the credit facility, referred to as the 2017 credit facility, that was originally entered into by the Company in November 2012, or the 2012 credit facility. As of December 31, 2018, the 2017 credit facility consisted of a $1.5 billion revolving credit facility, a $1.3 billion term loan (or "Term Loan A"), and a $200.0 million term loan (or "Term Loan B") with maturity dates of March 31, 2022, March 31, 2023, and November 21, 2024, respectively. The revolving credit facility has twosix-month as-of-right extension options to March 31, 2023. We also have an option, subject to customary conditions, to increase the capacity of the credit facility to $4.5 billion at any time prior to the maturity dates for the revolving credit facility and term loans without the consent of existing lenders, by obtaining additional commitments from our existing lenders and other financial institutions.

As of December 31, 2018, the 2017 credit facility bore interest at a spread over 30-day LIBOR ranging from (i) 82.5 basis points to 155 basis points for loans under the revolving credit facility, (ii) 90 basis points to 175 basis points for loans under Term Loan A, and (iii) 150 basis points to 245 basis points for loans under Term Loan B, in each case based on the credit rating assigned to the senior unsecured long term indebtedness of the Company.

At December 31, 2018, the applicable spread was 100 basis points for the revolving credit facility, 110 basis points for Term Loan A, and 165 basis points for Term Loan B. We are required to pay quarterly in arrears a 12.5 to 30 basis point facility fee on the total commitments under the revolving credit facility based on the credit rating assigned to the senior unsecured long term indebtedness of the Company. As of December 31, 2018, the facility fee was 20 basis points.

As of December 31, 2018, we had $11.8 million of outstanding letters of credit, $500.0 million drawn under the revolving credit facility and $1.5 billion outstanding under the term loan facilities, with total undrawn capacity of $1.0 billion under the 2017 credit facility. At December 31, 2018 and December 31, 2017, the revolving credit facility had a carrying value of $492.2 million and $30.3 million, respectively, net of deferred financing costs. At December 31, 2018 and December 31, 2017, the term loan facilities had a carrying value of $1.5 billion and $1.5 billion, respectively, net of deferred financing costs.

The Company and the Operating Partnership are borrowers jointly and severally obligated under the 2017 credit facility.

The 2017 credit facility includes certain restrictions and covenants (see Restrictive Covenants below).

Senior Unsecured Notes

The following table sets forth our senior unsecured notes and other related disclosures as of December 31, 2018 and 2017, respectively, by scheduled maturity date (amounts in thousands):

Issuance	December 31, 2018 Unpaid Principal Balance		December 31, 2018 Accreted Balance			December 31, 2017 Accreted Balance			Interest Rate (1)			Initial Term (in Years)	Maturity Date
March 16, 2010 (2)	$	250,000	$	250,000		$	250,000			7.75	%	10	March 2020
August 7, 2018 (3) (4)	350,000		350,000			—			L+	0.98	%	3	August 2021
October 5, 2017 (3)	500,000		499,591			499,489				3.25	%	5	October 2022
November 15, 2012 (5)	300,000		304,168			305,163				4.50	%	10	December 2022
December 17, 2015 (2)	100,000		100,000			100,000				4.27	%	10	December 2025
August 5, 2011 (2) (6)	—		—			249,953
	$	1,500,000	$	1,503,759		$	1,404,605
Deferred financing costs, net			(8,545		)	(8,666		)
	$	1,500,000	$	1,495,214		$	1,395,939

(1) Interest rate as of December 31, 2018, taking into account interest rate hedges in effect during the period. Floating rate notes are presented with the stated spread over 3-month LIBOR, unless otherwise specified. Interest on the senior unsecured notes is payable semi-annually with principal and unpaid interest due on the scheduled maturity dates.

(2) Issued by the Company and the Operating Partnership as co-obligors.

(3) Issued by the Operating Partnership with the Company as the guarantor.

(4) Beginning on August 8, 2019 and at any time thereafter, the notes are subject to redemption at the Company's option, in whole but not in part, at a redemption price equal to 100% of the principal amount of the notes, plus unpaid accrued interest thereon to the redemption date.

(5) In October 2017, the Company and the Operating Partnership as co-obligors issued an additional $100.0 million of 4.50% senior unsecured notes due December 2022. The notes were priced at 105.334%.

(6) The balance was repaid in August 2018.

Restrictive Covenants

The terms of the 2017 credit facility and certain of our senior unsecured notes include certain restrictions and covenants which may limit, among other things, our ability to pay dividends, make certain types of investments, incur additional indebtedness, incur liens and enter into negative pledge agreements and dispose of assets, and which require compliance with financial ratios relating to the maximum ratio of total indebtedness to total asset value, a minimum ratio of EBITDA to fixed charges, a maximum ratio of secured indebtedness to total asset value and a maximum ratio of unsecured indebtedness to unencumbered asset value. The dividend restriction referred to above provides that, we will not during any time when a default is continuing, make distributions with respect to common stock or other equity interests, except to enable the Company to continue to qualify as a REIT for Federal income tax purposes. As of December 31, 2018 and 2017, we were in compliance with all such covenants.

Junior Subordinated Deferrable Interest Debentures

In June 2005, the Company and the Operating Partnership issued $100.0 million in unsecured trust preferred securities through a newly formed trust, SL Green Capital Trust I, or the Trust, which is a wholly-owned subsidiary of the Operating Partnership. The securities mature in 2035 and bear interest at a floating rate of 125 basis points over the three-month LIBOR. Interest payments may be deferred for a period of up to eight consecutive quarters if the Operating Partnership exercises its right to defer such payments. The Trust preferred securities are redeemable at the option of the Operating Partnership, in whole or in part, with no prepayment premium. We do not consolidate the Trust even though it is a variable interest entity as we are not the primary beneficiary. Because the Trust is not consolidated, we have recorded the debt on our consolidated balance sheets and the related payments are classified as interest expense.

Principal Maturities

Combined aggregate principal maturities of mortgages and other loans payable, 2017 credit facility, trust preferred securities, senior unsecured notes and our share of joint venture debt as of December 31, 2018, including as-of-right extension options and put options, were as follows (in thousands):

	Scheduled Amortization		Principal		Revolving Credit Facility		Unsecured Term Loans		Trust Preferred Securities		Senior Unsecured Notes		Total		Joint Venture Debt
2019	$	6,241	$	27,500	$	—	$	—	$	—	$	—	$	33,741	$	115,295
2020	11,117		315,523		—		—		—		250,000		576,640		278,791
2021	11,636		139,869		—		—		—		350,000		501,505		518,371
2022	9,429		198,588		—		—		—		800,000		1,008,017		220,810
2023	7,301		115,550		500,000		1,300,000		—		—		1,922,851		277,996
Thereafter	9,290		1,136,115		—		200,000		100,000		100,000		1,545,405		2,430,198
	$	55,014	$	1,933,145	$	500,000	$	1,500,000	$	100,000	$	1,500,000	$	5,588,159	$	3,841,461

Consolidated interest expense, excluding capitalized interest, was comprised of the following (in thousands):

	Year Ended December 31,
	2018			2017			2016
Interest expense before capitalized interest	$	244,788		$	284,649		$	348,062
Interest capitalized	(34,162		)	(26,020		)	(24,067		)
Interest income	(1,957		)	(1,584		)	(2,796		)
Interest expense, net	$	208,669		$	257,045		$	321,199

XML

Corporate Indebtedness

12 Months Ended

Dec. 31, 2018

Debt Disclosure [Abstract]

Corporate Indebtedness

Mortgages and Other Loans Payable

The first mortgages and other loans payable collateralized by the respective properties and assignment of leases or debt investments at December 31, 2018 and 2017, respectively, were as follows (amounts in thousands):

Property	Maturity Date	Interest Rate (1)		December 31, 2018			December 31, 2017
Fixed Rate Debt:
762 Madison Avenue	February 2022		5.00%	771			771
100 Church Street	July 2022		4.68%	213,208			217,273
420 Lexington Avenue	October 2024		3.99%	300,000			300,000
400 East 58th Street (2)	November 2026		3.00%	39,931			40,000
Landmark Square	January 2027		4.90%	100,000			100,000
485 Lexington Avenue	February 2027		4.25%	450,000			450,000
1080 Amsterdam (3)	February 2027		3.58%	35,807			36,363
315 West 33rd Street	February 2027		4.17%	250,000			250,000
919 Third Avenue (4)				—			500,000
Unsecured Loan (5)				—			16,000
Series J Preferred Units (6)				—			4,000
One Madison Avenue (7)				—			486,153
Total fixed rate debt				$	1,389,717		$	2,400,560
Floating Rate Debt:
FHLB Facility	May 2019	L+	0.27%	$	13,000		$	—
2017 Master Repurchase Agreement	June 2019	L+	2.34%	300,000			90,809
FHLB Facility	December 2019	L+	0.18%	14,500			—
133 Greene Street	August 2020	L+	2.00%	15,523			—
185 Broadway (8)	November 2021	L+	2.85%	111,869			58,000
712 Madison	December 2021	L+	2.50%	28,000			—
115 Spring Street	September 2023	L+	3.40%	65,550			—
719 Seventh Avenue	September 2023	L+	1.20%	50,000			41,622
220 East 42nd Street (9)				—			275,000
Total floating rate debt				$	598,442		$	465,431
Total fixed rate and floating rate debt				$	1,988,159		$	2,865,991
Mortgages reclassed to liabilities related to assets held for sale				—			—
Total mortgages and other loans payable				$	1,988,159		$	2,865,991
Deferred financing costs, net of amortization				(26,919		)	(28,709		)
Total mortgages and other loans payable, net				$	1,961,240		$	2,837,282

(1) Interest rate as of December 31, 2018, taking into account interest rate hedges in effect during the period. Floating rate debt is presented with the stated interest rate spread over 30-day LIBOR, unless otherwise specified.

(2) The loan carries a fixed interest rate of 300 basis points for the first five years and is prepayable without penalty at the end of year five.

(3) The loan is comprised of a $35.5 million mortgage loan and $0.9 million subordinate loan with a fixed interest rate of 350 basis points and 700 basis points, respectively, for the first five years and is prepayable without penalty at the end of year five.

(4) Our investment in the property was deconsolidated as of January 1, 2018. See Note 6, "Investments in Unconsolidated Joint Ventures".

(5) In May 2018, the loan was repaid in connection with the sale of the property.

(6) In June 2018, the Series J Preferred Units were redeemed in connection with the sale of the property.

(7) In 2018, the Company recognized a $14.9 million loss on extinguishment of debt related to the early repayment of this loan.

(8) This loan is a $225.0 million construction facility, with reductions in interest cost based on meeting certain conditions, and has an initial three-year term with twoone-year extension options. Advances under the loan are subject to incurred costs and funded equity requirements.

(9) In 2018, the mortgage was repaid.

At December 31, 2018 and 2017, the gross book value of the properties and debt and preferred equity investments collateralizing the mortgages and other loans payable, not including assets held for sale, was approximately $3.9 billion and $4.8 billion, respectively.

Federal Home Loan Bank of New York Facility

The Company’s wholly-owned subsidiary, Ticonderoga Insurance Company, or Ticonderoga, a Vermont licensed captive insurance company, is a member of the Federal Home Loan Bank of New York, or FHLBNY. As a member, Ticonderoga may borrow funds from the FHLBNY in the form of secured advances. As of December 31, 2018, we had $13.0 million and $14.5 million in outstanding secured advances with a borrowing rate of 30-day LIBOR over 27 basis points and 30-day LIBOR over 18 basis points, respectively.

Master Repurchase Agreements

The Company has entered into two Master Repurchase Agreements, or MRAs, known as the 2016 MRA and 2017 MRA, which provide us with the ability to sell certain debt investments with a simultaneous agreement to repurchase the same at a certain date or on demand. We seek to mitigate risks associated with our repurchase agreement by managing the credit quality of our assets, early repayments, interest rate volatility, liquidity, and market value. The margin call provisions under our repurchase facilities permit valuation adjustments based on capital markets activity, and are not limited to collateral-specific credit marks. To monitor credit risk associated with our debt investments, our asset management team regularly reviews our investment portfolio and is in contact with our borrowers in order to monitor the collateral and enforce our rights as necessary. The risk associated with potential margin calls is further mitigated by our ability to recollateralize the facility with additional assets from our portfolio of debt investments, our ability to satisfy margin calls with cash or cash equivalents and our access to additional liquidity through the 2017 credit facility, as defined below.

In June 2017, we entered into the 2017 MRA, with a maximum facility capacity of $300.0 million. In April 2018, we increased the maximum facility capacity to $400.0 million. The facility bears interest on a floating rate basis at a spread to 30-day LIBOR based on the pledged collateral and advance rate and has an initial one year term, with twoone year extension options. In June 2018, we exercised a one year extension option. At December 31, 2018, the facility had a carrying value of $299.6 million, net of deferred financing costs.

In July 2016, we entered into a restated 2016 MRA, with a maximum facility capacity of $300.0 million. In June 2018, we terminated the restated 2016 MRA. The facility bore interest ranging from 225 and 400 basis points over 30-day LIBOR depending on the pledged collateral and had an initial two-year term, with a one year extension option. Since December 6, 2015, we had been required to pay monthly in arrears a 25 basis point fee on the excess of $150.0 million over the average daily balance during the period when the average daily balance was less than $150.0 million.

Corporate Indebtedness

2017 Credit Facility

In November 2017, we entered into an amendment to the credit facility, referred to as the 2017 credit facility, that was originally entered into by the Company in November 2012, or the 2012 credit facility. As of December 31, 2018, the 2017 credit facility consisted of a $1.5 billion revolving credit facility, a $1.3 billion term loan (or "Term Loan A"), and a $200.0 million term loan (or "Term Loan B") with maturity dates of March 31, 2022, March 31, 2023, and November 21, 2024, respectively. The revolving credit facility has twosix-month as-of-right extension options to March 31, 2023. We also have an option, subject to customary conditions, to increase the capacity of the credit facility to $4.5 billion at any time prior to the maturity dates for the revolving credit facility and term loans without the consent of existing lenders, by obtaining additional commitments from our existing lenders and other financial institutions.

As of December 31, 2018, the 2017 credit facility bore interest at a spread over 30-day LIBOR ranging from (i) 82.5 basis points to 155 basis points for loans under the revolving credit facility, (ii) 90 basis points to 175 basis points for loans under Term Loan A, and (iii) 150 basis points to 245 basis points for loans under Term Loan B, in each case based on the credit rating assigned to the senior unsecured long term indebtedness of the Company.

At December 31, 2018, the applicable spread was 100 basis points for the revolving credit facility, 110 basis points for Term Loan A, and 165 basis points for Term Loan B. We are required to pay quarterly in arrears a 12.5 to 30 basis point facility fee on the total commitments under the revolving credit facility based on the credit rating assigned to the senior unsecured long term indebtedness of the Company. As of December 31, 2018, the facility fee was 20 basis points.

As of December 31, 2018, we had $11.8 million of outstanding letters of credit, $500.0 million drawn under the revolving credit facility and $1.5 billion outstanding under the term loan facilities, with total undrawn capacity of $1.0 billion under the 2017 credit facility. At December 31, 2018 and December 31, 2017, the revolving credit facility had a carrying value of $492.2 million and $30.3 million, respectively, net of deferred financing costs. At December 31, 2018 and December 31, 2017, the term loan facilities had a carrying value of $1.5 billion and $1.5 billion, respectively, net of deferred financing costs.

The Company and the Operating Partnership are borrowers jointly and severally obligated under the 2017 credit facility.

The 2017 credit facility includes certain restrictions and covenants (see Restrictive Covenants below).

Senior Unsecured Notes

The following table sets forth our senior unsecured notes and other related disclosures as of December 31, 2018 and 2017, respectively, by scheduled maturity date (amounts in thousands):

Issuance	December 31, 2018 Unpaid Principal Balance		December 31, 2018 Accreted Balance			December 31, 2017 Accreted Balance			Interest Rate (1)			Initial Term (in Years)	Maturity Date
March 16, 2010 (2)	$	250,000	$	250,000		$	250,000			7.75	%	10	March 2020
August 7, 2018 (3) (4)	350,000		350,000			—			L+	0.98	%	3	August 2021
October 5, 2017 (3)	500,000		499,591			499,489				3.25	%	5	October 2022
November 15, 2012 (5)	300,000		304,168			305,163				4.50	%	10	December 2022
December 17, 2015 (2)	100,000		100,000			100,000				4.27	%	10	December 2025
August 5, 2011 (2) (6)	—		—			249,953
	$	1,500,000	$	1,503,759		$	1,404,605
Deferred financing costs, net			(8,545		)	(8,666		)
	$	1,500,000	$	1,495,214		$	1,395,939

(1) Interest rate as of December 31, 2018, taking into account interest rate hedges in effect during the period. Floating rate notes are presented with the stated spread over 3-month LIBOR, unless otherwise specified. Interest on the senior unsecured notes is payable semi-annually with principal and unpaid interest due on the scheduled maturity dates.

(2) Issued by the Company and the Operating Partnership as co-obligors.

(3) Issued by the Operating Partnership with the Company as the guarantor.

(4) Beginning on August 8, 2019 and at any time thereafter, the notes are subject to redemption at the Company's option, in whole but not in part, at a redemption price equal to 100% of the principal amount of the notes, plus unpaid accrued interest thereon to the redemption date.

(5) In October 2017, the Company and the Operating Partnership as co-obligors issued an additional $100.0 million of 4.50% senior unsecured notes due December 2022. The notes were priced at 105.334%.

(6) The balance was repaid in August 2018.

Restrictive Covenants

The terms of the 2017 credit facility and certain of our senior unsecured notes include certain restrictions and covenants which may limit, among other things, our ability to pay dividends, make certain types of investments, incur additional indebtedness, incur liens and enter into negative pledge agreements and dispose of assets, and which require compliance with financial ratios relating to the maximum ratio of total indebtedness to total asset value, a minimum ratio of EBITDA to fixed charges, a maximum ratio of secured indebtedness to total asset value and a maximum ratio of unsecured indebtedness to unencumbered asset value. The dividend restriction referred to above provides that, we will not during any time when a default is continuing, make distributions with respect to common stock or other equity interests, except to enable the Company to continue to qualify as a REIT for Federal income tax purposes. As of December 31, 2018 and 2017, we were in compliance with all such covenants.

Junior Subordinated Deferrable Interest Debentures

In June 2005, the Company and the Operating Partnership issued $100.0 million in unsecured trust preferred securities through a newly formed trust, SL Green Capital Trust I, or the Trust, which is a wholly-owned subsidiary of the Operating Partnership. The securities mature in 2035 and bear interest at a floating rate of 125 basis points over the three-month LIBOR. Interest payments may be deferred for a period of up to eight consecutive quarters if the Operating Partnership exercises its right to defer such payments. The Trust preferred securities are redeemable at the option of the Operating Partnership, in whole or in part, with no prepayment premium. We do not consolidate the Trust even though it is a variable interest entity as we are not the primary beneficiary. Because the Trust is not consolidated, we have recorded the debt on our consolidated balance sheets and the related payments are classified as interest expense.

Principal Maturities

Combined aggregate principal maturities of mortgages and other loans payable, 2017 credit facility, trust preferred securities, senior unsecured notes and our share of joint venture debt as of December 31, 2018, including as-of-right extension options and put options, were as follows (in thousands):

	Scheduled Amortization		Principal		Revolving Credit Facility		Unsecured Term Loans		Trust Preferred Securities		Senior Unsecured Notes		Total		Joint Venture Debt
2019	$	6,241	$	27,500	$	—	$	—	$	—	$	—	$	33,741	$	115,295
2020	11,117		315,523		—		—		—		250,000		576,640		278,791
2021	11,636		139,869		—		—		—		350,000		501,505		518,371
2022	9,429		198,588		—		—		—		800,000		1,008,017		220,810
2023	7,301		115,550		500,000		1,300,000		—		—		1,922,851		277,996
Thereafter	9,290		1,136,115		—		200,000		100,000		100,000		1,545,405		2,430,198
	$	55,014	$	1,933,145	$	500,000	$	1,500,000	$	100,000	$	1,500,000	$	5,588,159	$	3,841,461

Consolidated interest expense, excluding capitalized interest, was comprised of the following (in thousands):

	Year Ended December 31,
	2018			2017			2016
Interest expense before capitalized interest	$	244,788		$	284,649		$	348,062
Interest capitalized	(34,162		)	(26,020		)	(24,067		)
Interest income	(1,957		)	(1,584		)	(2,796		)
Interest expense, net	$	208,669		$	257,045		$	321,199

XML

Related Party Transactions

12 Months Ended

Dec. 31, 2018

Related Party Transactions [Abstract]

Related Party Transactions

Related Party Transactions

Cleaning/ Security/ Messenger and Restoration Services

Alliance Building Services, or Alliance, and its affiliates are partially owned by Gary Green, a son of Stephen L. Green, who serves as a member and as the chairman emeritus of our board of directors, and provide services to certain properties owned by us. Alliance’s affiliates include First Quality Maintenance, L.P., or First Quality, Classic Security LLC, Bright Star Couriers LLC and Onyx Restoration Works, and provide cleaning, extermination, security, messenger, and restoration services, respectively. In addition, First Quality has the non-exclusive opportunity to provide cleaning and related services to individual tenants at our properties on a basis separately negotiated with any tenant seeking such additional services. The Service Corporation has entered into an arrangement with Alliance whereby it will receive a profit participation above a certain threshold for services provided by Alliance to certain tenants at certain buildings above the base services specified in their lease agreements.

Income earned from the profit participation, which is included in other income on the consolidated statements of operations, was $3.9 million, $3.9 million and $3.5 million for the years ended December 31, 2018, 2017 and 2016, respectively.

We also recorded expenses, inclusive of capitalized expenses, of $18.8 million, $22.6 million and $23.4 million the years ended December 31, 2018, 2017 and 2016, respectively, for these services (excluding services provided directly to tenants).

Management Fees

S.L. Green Management Corp., a consolidated entity, receives property management fees from an entity in which Stephen L. Green owns an interest. We received management fees from this entity of $0.6 million, $0.5 million and $0.7 million for the years ended December 31, 2018, 2017, and 2016 respectively.

One Vanderbilt Investment

In December 2016, we entered into agreements with entities owned and controlled by Marc Holliday and Andrew Mathias, pursuant to which they agreed to make an investment in our One Vanderbilt project at the appraised fair market value for the interests acquired. This investment entitles these entities to receive approximately 1.50% - 1.80% and 1.00% - 1.20%, respectively, of any profits realized by the Company from its One Vanderbilt project in excess of the Company’s capital contributions. The entities have no right to any return of capital. Accordingly, subject to previously disclosed repurchase rights, these interests will have no value and will not entitle these entities to any amounts (other than limited distributions to cover tax liabilities incurred) unless and until the Company has received distributions from the One Vanderbilt project in excess of the Company’s aggregate investment in the project. In the event that the Company does not realize a profit on its investment in the project (or would not realize a profit based on the value at the time the interests are repurchased), the entities owned and controlled by Messrs. Holliday and Mathias will lose the entire amount of their investment. The entities owned and controlled by Messrs. Holliday and Mathias paid $1.4 million and $1.0 million, respectively, which equal the fair market value of the interests acquired as of the date the investment agreements were entered into as determined by an independent third party appraisal that we obtained.

Messrs. Holliday and Mathias cannot monetize their interests until after stabilization of the property (50% within three years after stabilization and 100% three years or more after stabilization). In addition, the agreement calls for us to repurchase these interests in the event of a sale of One Vanderbilt or a transactional change of control of the Company. We also have the right to repurchase these interests on the seven-year anniversary of the stabilization of the project or upon the occurrence of certain separation events prior to the stabilization of the project relating to each of Messrs. Holliday’s and Mathias’s continued service with us. The price paid upon monetization of the interests will equal the liquidation value of the interests at the time, with the value of One Vanderbilt being based on its sale price, if applicable, or fair market value as determined by an independent third party appraiser.

Other

We are entitled to receive fees for providing management, leasing, construction supervision, and asset management services to certain of our joint ventures as further described in Note 6, "Investments in Unconsolidated Joint Ventures." Amounts due from joint ventures and related parties at December 31, 2018 and 2017 consisted of the following (in thousands):

	December 31,
	2018		2017
Due from joint ventures	$	18,655	$	15,025
Other	9,378		8,014
Related party receivables	$	28,033	$	23,039

XML

Noncontrolling Interests on the Company's Consolidated Financial Statements

12 Months Ended

Dec. 31, 2018

Noncontrolling Interest [Abstract]

Noncontrolling Interests on the Company's Consolidated Financial Statements

Noncontrolling Interests on the Company's Consolidated Financial Statements

Noncontrolling interests represent the common and preferred units of limited partnership interest in the Operating Partnership not held by the Company as well as third party equity interests in our other consolidated subsidiaries. Noncontrolling interests in the Operating Partnership are shown in the mezzanine equity while the noncontrolling interests in our other consolidated subsidiaries are shown in the equity section of the Company’s consolidated financial statements.

Common Units of Limited Partnership Interest in the Operating Partnership

As of December 31, 2018 and 2017, the noncontrolling interest unit holders owned 4.70%, or 4,130,579 units, and 4.58%, or 4,452,979 units, of the Operating Partnership, respectively. As of December 31, 2018, 4,130,579 shares of our common stock were reserved for issuance upon the redemption of units of limited partnership interest of the Operating Partnership.

Noncontrolling interests in the Operating Partnership is recorded at the greater of its cost basis or fair market value based on the closing stock price of our common stock at the end of the reporting period.

Below is a summary of the activity relating to the noncontrolling interests in the Operating Partnership as of December 31, 2018 and 2017 (in thousands):

	December 31,
	2018			2017
Balance at beginning of period	$	461,954		$	473,882
Distributions	(15,000		)	(14,266		)
Issuance of common units	23,655			25,723
Redemption of common units	(60,718		)	(21,574		)
Net income	12,216			3,995
Accumulated other comprehensive income allocation	(66		)	(94		)
Fair value adjustment	(34,236		)	(5,712		)
Balance at end of period	$	387,805		$	461,954

Preferred Units of Limited Partnership Interest in the Operating Partnership

The Operating Partnership has 1,902,0004.50% Series G Preferred Units of limited partnership interest, or the Series G Preferred Units outstanding, with a liquidation preference of $25.00 per unit, which were issued in January 2012 in conjunction with an acquisition. The Series G Preferred unitholders receive annual dividends of $1.125 per unit paid on a quarterly basis and dividends are cumulative, subject to certain provisions. The Series G Preferred Units are convertible into a number of common units of limited partnership interest in the Operating Partnership equal to (i) the liquidation preference plus accumulated and unpaid distributions on the conversion date divided by (ii) $88.50. The common units of limited partnership interest in the Operating Partnership may be redeemed in exchange for our common stock on a 1-to-1 basis. The Series G Preferred Units also provide the holder with the right to require the Operating Partnership to repurchase the Series G Preferred Units for cash before January 31, 2022.

The Operating Partnership has 60 Series F Preferred Units outstanding with a mandatory liquidation preference of $1,000.00 per unit.

The Operating Partnership has authorized up to 700,0003.50% Series K Preferred Units of limited partnership interest, or the Series K Preferred Units, with a liquidation preference of $25.00 per unit. In August 2014, the Company issued 563,954 Series K Preferred Units in conjunction with an acquisition. The Series K Preferred unitholders receive annual dividends of $0.875 per unit paid on a quarterly basis and dividends are cumulative, subject to certain provisions. The Series K Preferred Units can be redeemed at any time, at the option of the unitholder, either for cash or are convertible into a number of common units of limited partnership interest in the Operating Partnership equal to (i) the liquidation preference plus accumulated and unpaid distributions on the conversion date divided by (ii) $134.67.

The Operating Partnership has authorized up to 500,0004.00% Series L Preferred Units of limited partnership interest, or the Series L Preferred Units, with a liquidation preference of $25.00 per unit. In August 2014, the Company issued 378,634 Series L Preferred Units in conjunction with an acquisition. The Series L Preferred unitholders receive annual dividends of $1.00 per unit paid on a quarterly basis and dividends are cumulative, subject to certain provisions. The Series L Preferred Units can be redeemed at any time at par for cash at the option of the unitholder.

The Operating Partnership has authorized up to 1,600,0003.75% Series M Preferred Units of limited partnership interest, or the Series M Preferred Units, with a liquidation preference of $25.00 per unit. In February 2015, the Company issued 1,600,000 Series M Preferred Units in conjunction with the acquisition of ownership interests in and relating to certain residential and retail real estate properties. The Series M Preferred unitholders receive annual dividends of $0.9375 per unit paid on a quarterly basis and dividends are cumulative, subject to certain provisions. The Series M Preferred Units can be redeemed at any time at par for cash at the option of the unitholder.

The Operating Partnership has authorized up to 552,3033.00% Series N Preferred Units of limited partnership interest, or the Series N Preferred Units, with a liquidation preference of $25.00 per unit. In June 2015, the Company issued 552,303 Series N Preferred Units in conjunction with an acquisition. The Series N Preferred unitholders receive annual dividends of $0.75 per unit paid on a quarterly basis and dividends are cumulative, subject to certain provisions. The Series N Preferred Units can be redeemed at any time at par for cash at the option of the unitholder.

The Operating Partnership has authorized an aggregate of one6.25% Series O Preferred Unit of limited partnership interest, or the Series O Preferred Unit. In June 2015, the Company issued the Series O Preferred Unit in connection with an acquisition.

The Operating Partnership has authorized up to 200,0004.00% Series P Preferred Units of limited partnership interest, or the Series P Preferred Units, with a liquidation preference of $25.00 per unit. In July 2015, the Company issued 200,000 Series P Preferred Units in conjunction with an acquisition. The Series P Preferred unitholders receive annual dividends of $1.00 per unit paid on a quarterly basis and dividends are cumulative, subject to certain provisions. The Series P Preferred Units can be redeemed at any time at par for cash at the option of the unitholder.

The Operating Partnership has authorized up to 268,0003.50% Series Q Preferred Units of limited partnership interest, or the Series Q Preferred Units, with a liquidation preference of $25.00 per unit. In July 2015, the Company issued 268,000 Series Q Preferred Units in conjunction with an acquisition. The Series Q Preferred unitholders receive annual dividends of $0.875 per unit paid on a quarterly basis and dividends are cumulative, subject to certain provisions. The Series Q Preferred Units can be redeemed at any time, at the option of the unitholder, either for cash or are convertible into a number of common units of limited partnership interest in the Operating Partnership equal to (i) the liquidation preference plus accumulated and unpaid distributions on the conversion date divided by (ii) $148.95.

The Operating Partnership has authorized up to 400,0003.50% Series R Preferred Units of limited partnership interest, or the Series R Preferred Units, with a liquidation preference of $25.00 per unit. In August 2015, the Company issued 400,000 Series R Preferred Units in conjunction with an acquisition. The Series R Preferred unitholders receive annual dividends of $0.875 per unit paid on a quarterly basis and dividends are cumulative, subject to certain provisions. The Series R Preferred Units can be redeemed at any time, at the option of the unitholder, either for cash or are convertible into a number of common units of limited partnership interest in the Operating Partnership equal to (i) the liquidation preference plus accumulated and unpaid distributions on the conversion date divided by (ii) $154.89.

The Operating Partnership has authorized up to 1,077,2804.00% Series S Preferred Units of limited partnership interest, or the Series S Preferred Units, with a liquidation preference of $25.00 per unit. In August 2015, the Company issued 1,077,280 Series S Preferred Units in conjunction with an acquisition. The Series S Preferred unitholders receive annual dividends of $1.00 per unit paid on a quarterly basis and dividends are cumulative, subject to certain provisions. The Series S Preferred Units can be redeemed at any time at par for cash at the option of the unitholder.

The Operating Partnership has authorized up to 230,0002.75% Series T Preferred Units of limited partnership interest, or the Series T Preferred Units, with a liquidation preference of $25.00 per unit. In March 2016, the Company issued 230,000 Series T Preferred Units in conjunction with an acquisition. The Series T Preferred unitholders receive annual dividends of $0.6875 per unit paid on a quarterly basis and dividends are cumulative, subject to certain provisions. The Series T Preferred Units can be redeemed at any time at par, at the option of the unitholder, either for cash or are convertible into a number of common units of limited partnership interest in the Operating Partnership equal to (i) the liquidation preference plus accumulated and unpaid distributions on the conversion date divided by (ii) $119.02.

The Operating Partnership has authorized up to 680,0004.50% Series U Preferred Units of limited partnership interest, or the Series U Preferred Units, with a liquidation preference of $25.00 per unit. In March 2016, the Company issued 680,000 Series U Preferred Units in conjunction with an acquisition. The Series U Preferred unitholders initially receive annual dividends of $1.125 per unit paid on a quarterly basis and dividends are cumulative, subject to certain provisions. The annual dividend is subject to reduction upon the occurrence of certain circumstances set forth in the terms of the Series U Preferred Units. The minimum annual dividend is $0.75 per unit. The Series U Preferred Units can be redeemed at any time at par for cash at the option of the unitholder.

Through a consolidated subsidiary, we have authorized up to 109,1613.50% Series A Preferred Units of limited partnership interest, or the Subsidiary Series A Preferred Units, with a liquidation preference of $1,000.00 per unit. In August 2015, the Company issued 109,161 Subsidiary Series A Preferred Units in conjunction with an acquisition. The Subsidiary Series A Preferred unitholders receive annual dividends of $35.00 per unit paid on a quarterly basis and dividends are cumulative, subject to certain provisions. The Subsidiary Series A Preferred Units can be redeemed at any time, at the option of the unitholder, either for cash or are convertible on a one-for-one basis, into the Series B Preferred Units of limited partnership interest, or the Subsidiary Series B Preferred Units. The Subsidiary Series B Preferred Units can be converted at any time, at the option of the unitholder, into a number of common stock equal to 6.71348 shares of common stock for each Subsidiary Series B Preferred Unit. As of December 31, 2018, no Subsidiary Series B Preferred Units have been issued.

Below is a summary of the activity relating to the preferred units in the Operating Partnership as of December 31, 2018 and 2017 (in thousands):

	December 31,
	2018			2017
Balance at beginning of period	$	301,735		$	302,010
Issuance of preferred units	—			—
Redemption of preferred units	(1,308		)	(275		)
Balance at end of period	$	300,427		$	301,735

XML

Stockholders' Equity of the Company

12 Months Ended

Dec. 31, 2018

Stockholders' Equity Note [Abstract]

Stockholders' Equity of the Company

Stockholders’ Equity of the Company

Common Stock

Our authorized capital stock consists of 260,000,000 shares, $0.01 par value per share, consisting of 160,000,000 shares of common stock, $0.01 par value per share, 75,000,000 shares of excess stock, at $0.01 par value per share, and 25,000,000 shares of preferred stock, par value $0.01 per share. As of December 31, 2018, 83,683,847 shares of common stock and no shares of excess stock were issued and outstanding.

Share Repurchase Program

In August 2016, our Board of Directors approved a share repurchase plan under which we can buy up to $1.0 billion of shares of our common stock. The Board of Directors has since authorized threeseparate $500.0 million increases to the size of the share repurchase program in the fourth quarter of 2017, second quarter of 2018, and fourth quarter of 2018, bringing the program total to $2.5 billion.

At December 31, 2018 repurchases executed under the plan were as follows:

Period	Shares repurchased	Average price paid per share	Cumulative number of shares repurchased as part of the repurchase plan or programs
Year ended 2017	8,342,411	$101.64	8,342,411
First quarter 2018	3,653,928	$97.07	11,996,339
Second quarter 2018	3,479,552	$97.22	15,475,891
Third quarter 2018	252,947	$99.75	15,728,838
Fourth quarter 2018	2,358,484	$93.04	18,087,322

At-The-Market Equity Offering Program

In March 2015, the Company, along with the Operating Partnership, entered into an "at-the-market" equity offering program, or ATM Program, to sell an aggregate of $300.0 million of our common stock. The Company did not make any sales of its common stock under the ATM program in the years ended December 31, 2018, 2017, or 2016.

Perpetual Preferred Stock

We have 9,200,000 shares of our 6.50% Series I Cumulative Redeemable Preferred Stock, or the Series I Preferred Stock, outstanding with a mandatory liquidation preference of $25.00 per share. The Series I Preferred stockholders receive annual dividends of $1.625 per share paid on a quarterly basis and dividends are cumulative, subject to certain provisions. We are entitled to redeem the Series I Preferred Stock at par for cash at our option. In August 2012, we received $221.9 million in net proceeds from the issuance of the Series I Preferred Stock, which were recorded net of underwriters' discount and issuance costs, and contributed the net proceeds to the Operating Partnership in exchange for 9,200,000 units of 6.50% Series I Cumulative Redeemable Preferred Units of limited partnership interest, or the Series I Preferred Units.

Dividend Reinvestment and Stock Purchase Plan ("DRSPP")

In February 2018, the Company filed a registration statement with the SEC for our dividend reinvestment and stock purchase plan, or DRSPP, which automatically became effective upon filing. The Company registered 3,500,000 shares of our common stock under the DRSPP. The DRSPP commenced on September 24, 2001.

The following table summarizes SL Green common stock issued, and proceeds received from dividend reinvestments and/or stock purchases under the DRSPP for the years ended December 31, 2018, 2017, and 2016, respectively (dollars in thousands):

	Year Ended December 31,
	2018		2017		2016
Shares of common stock issued	1,399		2,141		2,687
Dividend reinvestments/stock purchases under the DRSPP	$	136	$	223	$	277

Earnings per Share

We use the two-class method of computing earnings per share (“EPS”), which is an earnings allocation formula that determines EPS for common stock and any participating securities according to dividends declared (whether paid or unpaid). Under the two-class method, basic EPS is computed by dividing the income available to common stockholders by the weighted-average number of common stock shares outstanding for the period. Diluted EPS reflects the potential dilution that could occur from share equivalent activity.

SL Green's earnings per share for the years ended December 31, 2018, 2017, and 2016 are computed as follows (in thousands):

	Year Ended December 31,
Numerator	2018			2017			2016
Basic Earnings:
Income attributable to SL Green common stockholders	$	232,312		$	86,424		$	234,946
Less: distributed earnings allocated to participating securities	(552		)	$	(471	)	$	(634	)
Net income attributable to SL Green common stockholders (numerator for basic earnings per share)	$	231,760		$	85,953		$	234,312
Add back: undistributed earnings allocated to participating securities	552			471			634
Add back: Effect of dilutive securities (redemption of units to common shares)	12,216			3,995			10,136
Income attributable to SL Green common stockholders (numerator for diluted earnings per share)	$	244,528		$	90,419		$	245,082

	Year Ended December 31,
Denominator	2018	2017	2016
Basic Shares:
Weighted average common stock outstanding	86,753	98,571	100,185
Effect of Dilutive Securities:
Operating Partnership units redeemable for common shares	4,562	4,556	4,323
Stock-based compensation plans	215	276	373
Diluted weighted average common stock outstanding	91,530	103,403	104,881

SL Green has excluded 1,138,647, 774,782 and 263,991 common stock equivalents from the diluted shares outstanding for the years ended December 31, 2018, 2017, and 2016 respectively, as they were anti-dilutive.

XML

Partners' Capital of the Operating Partnership

12 Months Ended

Dec. 31, 2018

Stockholders' Equity

Partners' Capital of the Operating Partnership

Stockholders’ Equity of the Company

Common Stock

Our authorized capital stock consists of 260,000,000 shares, $0.01 par value per share, consisting of 160,000,000 shares of common stock, $0.01 par value per share, 75,000,000 shares of excess stock, at $0.01 par value per share, and 25,000,000 shares of preferred stock, par value $0.01 per share. As of December 31, 2018, 83,683,847 shares of common stock and no shares of excess stock were issued and outstanding.

Share Repurchase Program

In August 2016, our Board of Directors approved a share repurchase plan under which we can buy up to $1.0 billion of shares of our common stock. The Board of Directors has since authorized threeseparate $500.0 million increases to the size of the share repurchase program in the fourth quarter of 2017, second quarter of 2018, and fourth quarter of 2018, bringing the program total to $2.5 billion.

At December 31, 2018 repurchases executed under the plan were as follows:

Period	Shares repurchased	Average price paid per share	Cumulative number of shares repurchased as part of the repurchase plan or programs
Year ended 2017	8,342,411	$101.64	8,342,411
First quarter 2018	3,653,928	$97.07	11,996,339
Second quarter 2018	3,479,552	$97.22	15,475,891
Third quarter 2018	252,947	$99.75	15,728,838
Fourth quarter 2018	2,358,484	$93.04	18,087,322

At-The-Market Equity Offering Program

In March 2015, the Company, along with the Operating Partnership, entered into an "at-the-market" equity offering program, or ATM Program, to sell an aggregate of $300.0 million of our common stock. The Company did not make any sales of its common stock under the ATM program in the years ended December 31, 2018, 2017, or 2016.

Perpetual Preferred Stock

We have 9,200,000 shares of our 6.50% Series I Cumulative Redeemable Preferred Stock, or the Series I Preferred Stock, outstanding with a mandatory liquidation preference of $25.00 per share. The Series I Preferred stockholders receive annual dividends of $1.625 per share paid on a quarterly basis and dividends are cumulative, subject to certain provisions. We are entitled to redeem the Series I Preferred Stock at par for cash at our option. In August 2012, we received $221.9 million in net proceeds from the issuance of the Series I Preferred Stock, which were recorded net of underwriters' discount and issuance costs, and contributed the net proceeds to the Operating Partnership in exchange for 9,200,000 units of 6.50% Series I Cumulative Redeemable Preferred Units of limited partnership interest, or the Series I Preferred Units.

Dividend Reinvestment and Stock Purchase Plan ("DRSPP")

In February 2018, the Company filed a registration statement with the SEC for our dividend reinvestment and stock purchase plan, or DRSPP, which automatically became effective upon filing. The Company registered 3,500,000 shares of our common stock under the DRSPP. The DRSPP commenced on September 24, 2001.

The following table summarizes SL Green common stock issued, and proceeds received from dividend reinvestments and/or stock purchases under the DRSPP for the years ended December 31, 2018, 2017, and 2016, respectively (dollars in thousands):

	Year Ended December 31,
	2018		2017		2016
Shares of common stock issued	1,399		2,141		2,687
Dividend reinvestments/stock purchases under the DRSPP	$	136	$	223	$	277

Earnings per Share

We use the two-class method of computing earnings per share (“EPS”), which is an earnings allocation formula that determines EPS for common stock and any participating securities according to dividends declared (whether paid or unpaid). Under the two-class method, basic EPS is computed by dividing the income available to common stockholders by the weighted-average number of common stock shares outstanding for the period. Diluted EPS reflects the potential dilution that could occur from share equivalent activity.

SL Green's earnings per share for the years ended December 31, 2018, 2017, and 2016 are computed as follows (in thousands):

	Year Ended December 31,
Numerator	2018			2017			2016
Basic Earnings:
Income attributable to SL Green common stockholders	$	232,312		$	86,424		$	234,946
Less: distributed earnings allocated to participating securities	(552		)	$	(471	)	$	(634	)
Net income attributable to SL Green common stockholders (numerator for basic earnings per share)	$	231,760		$	85,953		$	234,312
Add back: undistributed earnings allocated to participating securities	552			471			634
Add back: Effect of dilutive securities (redemption of units to common shares)	12,216			3,995			10,136
Income attributable to SL Green common stockholders (numerator for diluted earnings per share)	$	244,528		$	90,419		$	245,082

	Year Ended December 31,
Denominator	2018	2017	2016
Basic Shares:
Weighted average common stock outstanding	86,753	98,571	100,185
Effect of Dilutive Securities:
Operating Partnership units redeemable for common shares	4,562	4,556	4,323
Stock-based compensation plans	215	276	373
Diluted weighted average common stock outstanding	91,530	103,403	104,881

SL Green has excluded 1,138,647, 774,782 and 263,991 common stock equivalents from the diluted shares outstanding for the years ended December 31, 2018, 2017, and 2016 respectively, as they were anti-dilutive.

SL Green Operating Partnership

Stockholders' Equity

Partners' Capital of the Operating Partnership

Partners' Capital of the Operating Partnership

The Company is the sole managing general partner of the Operating Partnership and at December 31, 2018 owned 83,683,847 general and limited partnership interests in the Operating Partnership and 9,200,000 Series I Preferred Units. Partnership interests in the Operating Partnership are denominated as “common units of limited partnership interest” (also referred to as “OP Units”) or “preferred units of limited partnership interest” (also referred to as “Preferred Units”). All references to OP Units and Preferred Units outstanding exclude such units held by the Company. A holder of an OP Unit may present such OP Unit to the Operating Partnership for redemption at any time (subject to restrictions agreed upon at the issuance of OP Units to particular holders that may restrict such right for a period of time, generally one year from issuance). Upon presentation of an OP Unit for redemption, the Operating Partnership must redeem such OP Unit in exchange for the cash equal to the then value of a share of common stock of the Company, except that the Company may, at its election, in lieu of cash redemption, acquire such OP Unit for one share of common stock. Because the number of shares of common stock outstanding at all times equals the number of OP Units that the Company owns, one share of common stock is generally the economic equivalent of one OP Unit, and the quarterly distribution that may be paid to the holder of an OP Unit equals the quarterly dividend that may be paid to the holder of a share of common stock. Each series of Preferred Units makes a distribution that is set in accordance with an amendment to the partnership agreement of the Operating Partnership. Preferred Units may also be convertible into OP Units at the election of the holder thereof or the Company, subject to the terms of such Preferred Units.

Net income (loss) allocated to the preferred unitholders and common unitholders reflects their pro rata share of net income (loss) and distributions.

Limited Partner Units

As of December 31, 2018, limited partners other than SL Green owned 4.70%, or 4,130,579 common units, of the Operating Partnership.

Preferred Units

Preferred units not owned by SL Green are further described in Note 11, “Noncontrolling Interests on the Company’s Consolidated Financial Statements - Preferred Units of Limited Partnership Interest in the Operating Partnership.”

Earnings per Unit

The Operating Partnership's earnings per unit for the years ended December 31, 2018, 2017, and 2016 respectively are computed as follows (in thousands):

	Year Ended December 31,
Numerator	2018			2017			2016
Basic Earnings:
Income attributable to SLGOP common unitholders	$	244,528		$	90,419		$	245,082
Less: distributed earnings allocated to participating securities	(552		)	$	(471	)	$	(634	)
Net Income attributable to SLGOP common unitholders (numerator for basic earnings per unit)	$	243,976		$	89,948		$	244,448
Add back: undistributed earnings allocated to participating securities	552			471			634
Income attributable to SLGOP common unitholders	$	244,528		$	90,419		$	245,082

	Year Ended December 31,
Denominator	2018	2017	2016
Basic units:
Weighted average common units outstanding	91,315	103,127	104,508
Effect of Dilutive Securities:
Stock-based compensation plans	215	276	373
Diluted weighted average common units outstanding	91,530	103,403	104,881

The Operating Partnership has excluded 1,138,647, 774,782, and 263,991 common unit equivalents from the diluted units outstanding for the years ended December 31, 2018, 2017, and 2016 respectively, as they were anti-dilutive.

XML

Share-based Compensation

12 Months Ended

Dec. 31, 2018

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Share-based Compensation

Share-based Compensation

We have stock-based employee and director compensation plans. Our employees are compensated through the Operating Partnership. Under each plan, whenever the Company issues common or preferred stock, the Operating Partnership issues an equivalent number of units of limited partnership interest of a corresponding class to the Company.

Fourth Amended and Restated 2005 Stock Option and Incentive Plan

The Fourth Amended and Restated 2005 Stock Option and Incentive Plan, or the 2005 Plan, was approved by the Company's board of directors in April 2016 and its stockholders in June 2016 at the Company's annual meeting of stockholders. The 2005 Plan authorizes the issuance of stock options, stock appreciation rights, unrestricted and restricted stock, phantom shares, dividend equivalent rights, cash-based awards and other equity-based awards. Subject to adjustments upon certain corporate transactions or events, awards with respect to up to a maximum of 27,030,000 fungible units may be granted under the 2005 Plan. Currently, different types of awards count against the limit on the number of fungible units differently, with (1) full-value awards (i.e., those that deliver the full value of the award upon vesting, such as restricted stock) counting as 3.74 Fungible Units per share subject to such awards, (2) stock options, stock appreciation rights and other awards that do not deliver full value and expire five years from the date of grant counting as 0.73 fungible units per share subject to such awards, and (3) all other awards (e.g., ten-year stock options) counting as 1.0 fungible units per share subject to such awards. Awards granted under the 2005 Plan prior to the approval of the fourth amendment and restatement in June 2016 continue to count against the fungible unit limit based on the ratios that were in effect at the time such awards were granted, which may be different than the current ratios. As a result, depending on the types of awards issued, the 2005 Plan may result in the issuance of more or less than 27,030,000 shares. If a stock option or other award granted under the 2005 Plan expires or terminates, the common stock subject to any portion of the award that expires or terminates without having been exercised or paid, as the case may be, will again become available for the issuance of additional awards. Shares of our common stock distributed under the 2005 Plan may be treasury shares or authorized but unissued shares. Currently, unless the 2005 Plan has been previously terminated by the Company's board of directors, new awards may be granted under the 2005 Plan until June 2, 2026, which is the tenth anniversary of the date that the 2005 Plan was most recently approved by the Company's stockholders. As of December 31, 2018, 6.7 million fungible units were available for issuance under the 2005 Plan after reserving for shares underlying outstanding restricted stock units, phantom stock units granted pursuant to our Non-Employee Directors' Deferral Program and LTIP Units.

Options are granted under the plan with an exercise price at the fair market value of the Company's common stock on the date of grant and, subject to employment, generally expire five or ten years from the date of grant, are not transferable other than on death, and generally vest in one to five years commencing one year from the date of grant. We have also granted Class O LTIP Units, which are a class of LTIP Units in the Operating Partnership structured to provide economics similar to those of stock options. Class O LTIP Units, once vested, may be converted, at the election of the holder, into a number of common units of the Operating Partnership per Class O LTIP Unit determined by the increase in value of a share of the Company’s common stock at the time of conversion over a participation threshold, which equals the fair market value of a share of the Company’s common stock at the time of grant. Class O LTIP Units are entitled to distributions, subject to vesting, equal per unit to 10% of the per unit distributions paid with respect to the common units of the Operating Partnership.

The fair value of each stock option or LTIP Unit granted is estimated on the date of grant using the Black-Scholes option pricing model based on historical information with the following weighted average assumptions for grants during the years ended December 31, 2018, 2017, and 2016.

	2018		2017		2016
Dividend yield	2.85	%	2.51	%	2.37	%
Expected life	3.5 years		4.4 years		3.7 years
Risk-free interest rate	2.48	%	1.73	%	1.57	%
Expected stock price volatility	22.00	%	28.10	%	26.76	%

A summary of the status of the Company's stock options as of December 31, 2018, 2017, and 2016 and changes during the years ended December 31, 2018, 2017, and 2016 are as follows:

	2018					2017					2016
	Options Outstanding			Weighted Average Exercise Price		Options Outstanding			Weighted Average Exercise Price		Options Outstanding			Weighted Average Exercise Price
Balance at beginning of year	$	1,548,719		$	101.48	$	1,737,213		$	98.44	$	1,595,007		$	95.52
Granted	6,000			97.91		174,000			105.66		445,100			105.86
Exercised	(316,302		)	90.22		(292,193		)	81.07		(192,875		)	76.90
Lapsed or canceled	(101,400		)	113.22		(70,301		)	121.68		(110,019		)	123.86
Balance at end of year	$	1,137,017		$	135.54	$	1,548,719		$	101.48	$	1,737,213		$	98.44
Options exercisable at end of year	783,035			$	101.28	800,902			$	94.33	748,617			$	87.72
Weighted average fair value of options granted during the year	$	84,068				$	3,816,652				$	8,363,036

All options were granted with strike prices ranging from $20.67 to $137.18. The remaining weighted average contractual life of the options outstanding was 3.5 years and the remaining weighted average contractual life of the options exercisable was 3.7 years.

During the years ended December 31, 2018, 2017, and 2016, we recognized compensation expense for these options of $5.4 million, $7.8 million, and $8.9 million, respectively. As of December 31, 2018, there was $2.6 million of total unrecognized compensation cost related to unvested stock options, which is expected to be recognized over a weighted average period of 1.0 years.

Stock-based Compensation

Effective January 1, 1999, the Company implemented a stock-based compensation plan where shares are granted to certain employees, including our executives, and vesting will occur annually upon the completion of a service period or our meeting established financial performance criteria. Annual vesting occurs at rates ranging from 15% to 35% once performance criteria are reached.

A summary of the Company's restricted stock as of December 31, 2018, 2017, and 2016 and charges during the years ended December 31, 2018, 2017, and 2016 are as follows:

	2018			2017		2016
Balance at beginning of year	3,298,216			3,202,031		3,137,881
Granted	162,900			96,185		98,800
Canceled	(9,100		)	—		(34,650		)
Balance at end of year	3,452,016			3,298,216		3,202,031
Vested during the year	92,114			95,736		83,822
Compensation expense recorded	$	12,757,704		$	9,809,749	$	7,153,966
Weighted average fair value of restricted stock granted during the year	$	13,440,503		$	9,905,986	$	10,650,077

The fair value of restricted stock that vested during the years ended December 31, 2018, 2017, and 2016 was $9.8 million, $9.4 million and $7.6 million, respectively. As of December 31, 2018, there was $22.7 million of total unrecognized compensation cost related to restricted stock, which is expected to be recognized over a weighted average period of 2.3 years.

For the years ended December 31, 2018, 2017, and 2016, $6.3 million, $7.2 million, and $6.0 million, respectively, was capitalized to assets associated with compensation expense related to our long-term compensation plans, restricted stock and stock options.

We granted LTIP Units, which include bonus, time-based and performance based awards, with a fair value of $22.0 million and $20.5 million during the years ended December 31, 2018 and 2017, respectively. The grant date fair value of the LTIP Unit awards was calculated in accordance with ASC 718. A third party consultant determined the fair value of the LTIP Units to have a discount from our common stock price. The discount was calculated by considering the inherent uncertainty that the LTIP Units will reach parity with other common partnership units and the illiquidity due to transfer restrictions. As of December 31, 2018, there was $2.9 million of total unrecognized compensation expense related to the time-based and performance based LTIP Unit awards, which is expected to be recognized over a weighted average period of 1.3 years.

During the years ended December 31, 2018, 2017, and 2016, we recorded compensation expense related to bonus, time-based and performance based LTIP Unit awards of $24.4 million, $26.1 million, and $26.5 million, respectively.

2014 Outperformance Plan

In August 2014, the compensation committee of the Company's board of directors approved the general terms of the SL Green Realty Corp. 2014 Outperformance Plan, or the 2014 Outperformance Plan. Participants in the 2014 Outperformance Plan could earn, in the aggregate, up to 610,000 LTIP Units in our Operating Partnership based on our total return to stockholders for the three-year period beginning September 1, 2014. Under the 2014 Outperformance Plan, two-thirds of the LTIP Units were subject to performance based vesting based on the Company’s absolute total return to stockholders and one-third of the LTIP Units were subject to performance based vesting based on relative total return to stockholders compared to the constituents of the MSCI REIT Index. LTIP Units earned under the 2014 Outperformance Plan were to be subject to continued vesting requirements, with 50% of any awards earned vesting on August 31, 2017 and the remaining 50% vesting on August 31, 2018, subject to continued employment with us through such dates. Participants were not entitled to distributions with respect to LTIP Units granted under the 2014 Outperformance Plan unless and until they are earned. If LTIP Units were earned, each participant would have been entitled to the distributions that would have been paid had the number of earned LTIP Units been issued at the beginning of the performance period, with such distributions being paid in the form of cash or additional LTIP Units. Thereafter, distributions were to be paid currently with respect to all earned LTIP Units, whether vested or unvested.

Based on our performance, none of the LTIP Units granted under the 2014 Outperformance Plan were earned pursuant to the terms of the 2014 Outperformance Plan, and all units issued were forfeited in 2017.

The cost of the 2014 Outperformance Plan ($27.9 million subject to forfeitures), based on the portion of the 2014 Outperformance Plan granted prior to termination, was amortized into earnings through December 31, 2017. We recorded zero compensation expense during the year ended December 31, 2018, and compensation expense of $13.6 million and $8.4 million during the years ended December 31, 2017 and 2016, respectively, related to the 2014 Outperformance Plan.

Deferred Compensation Plan for Directors

Under our Non-Employee Director's Deferral Program, which commenced July 2004, the Company's non-employee directors may elect to defer up to 100% of their annual retainer fee, chairman fees, meeting fees and annual stock grant. Unless otherwise elected by a participant, fees deferred under the program shall be credited in the form of phantom stock units. The program provides that a director's phantom stock units generally will be settled in an equal number of shares of common stock upon the earlier of (i) the January 1 coincident with or the next following such director's termination of service from the Board of Directors or (ii) a change in control by us, as defined by the program. Phantom stock units are credited to each non-employee director quarterly using the closing price of our common stock on the first business day of the respective quarter. Each participating non-employee director is also credited with dividend equivalents or phantom stock units based on the dividend rate for each quarter, which are either paid in cash currently or credited to the director’s account as additional phantom stock units.

During the year ended December 31, 2018, 13,638 phantom stock units were earned and 9,459 shares of common stock were issued to our board of directors. We recorded compensation expense of $2.4 million during the year ended December 31, 2018 related to the Deferred Compensation Plan. As of December 31, 2018, there were 113,492 phantom stock units outstanding pursuant to our Non-Employee Director's Deferral Program.

Employee Stock Purchase Plan

In 2007, the Company's board of directors adopted the 2008 Employee Stock Purchase Plan, or ESPP, to encourage our employees to make our business more successful by providing equity-based incentives to eligible employees. The ESPP is intended to qualify as an "employee stock purchase plan" under Section 423 of the Code, and has been adopted by the board to enable our eligible employees to purchase the Company's shares of common stock through payroll deductions. The ESPP became effective on January 1, 2008 with a maximum of 500,000 shares of the common stock available for issuance, subject to adjustment upon a merger, reorganization, stock split or other similar corporate change. The Company filed a registration statement on Form S-8 with the SEC with respect to the ESPP. The common stock is offered for purchase through a series of successive offering periods. Each offering period will be three months in duration and will begin on the first day of each calendar quarter, with the first offering period having commenced on January 1, 2008. The ESPP provides for eligible employees to purchase the common stock at a purchase price equal to 85% of the lesser of (1) the market value of the common stock on the first day of the offering period or (2) the market value of the common stock on the last day of the offering period. The ESPP was approved by our stockholders at our 2008 annual meeting of stockholders. As of December 31, 2018, 116,368 shares of our common stock had been issued under the ESPP.

XML

Accumulated Other Comprehensive Income

12 Months Ended

Dec. 31, 2018

Equity [Abstract]

Accumulated Other Comprehensive Income

Accumulated Other Comprehensive Income

The following tables set forth the changes in accumulated other comprehensive income (loss) by component as of December 31, 2018, 2017 and 2016 (in thousands):

	Net unrealized gain on derivative instruments (1)			SL Green’s share of joint venture net unrealized gain on derivative instruments (2)			Net unrealized gain on marketable securities			Total
Balance at December 31, 2015	$	(10,160	)	$	(592	)	$	2,003		$	(8,749	)
Other comprehensive income before reclassifications	13,534			1,160			3,517			18,211
Amounts reclassified from accumulated other comprehensive income	9,222			3,453			—			12,675
Balance at December 31, 2016	12,596			4,021			5,520			22,137
Other comprehensive (loss) income before reclassifications	(1,618		)	233			(1,348		)	(2,733		)
Amounts reclassified from accumulated other comprehensive income	1,564			766			(3,130		)	(800		)
Balance at December 31, 2017	12,542			5,020			1,042			18,604
Other comprehensive (loss) income before reclassifications	(2,252		)	(103		)	51			(2,304		)
Amounts reclassified from accumulated other comprehensive income	(574		)	(618		)	—			(1,192		)
Balance at December 31, 2018	$	9,716		$	4,299		$	1,093		$	15,108

(1) Amount reclassified from accumulated other comprehensive income (loss) is included in interest expense in the respective consolidated statements of operations. As of December 31, 2018 and 2017, the deferred net losses from these terminated hedges, which is included in accumulated other comprehensive loss relating to net unrealized loss on derivative instrument, was $1.3 million and $3.2 million, respectively.

(2) Amount reclassified from accumulated other comprehensive income (loss) is included in equity in net income from unconsolidated joint ventures in the respective consolidated statements of operations.

XML

Fair Value Measurements

12 Months Ended

Dec. 31, 2018

Fair Value Disclosures [Abstract]

Fair Value Measurements

Fair Value Measurements

We are required to disclose fair value information with regard to our financial instruments, whether or not recognized in the consolidated balance sheets, for which it is practical to estimate fair value. The FASB guidance defines fair value as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants on the measurement date. We measure and/or disclose the estimated fair value of financial assets and liabilities based on a hierarchy that distinguishes between market participant assumptions based on market data obtained from sources independent of the reporting entity and the reporting entity’s own assumptions about market participant assumptions. This hierarchy consists of three broad levels: Level 1 - quoted prices (unadjusted) in active markets for identical assets or liabilities that the reporting entity can access at the measurement date; Level 2 - inputs other than quoted prices included within Level 1, that are observable for the asset or liability, either directly or indirectly; and Level 3 - unobservable inputs for the asset or liability that are used when little or no market data is available. We follow this hierarchy for our assets and liabilities measured at fair value on a recurring and nonrecurring basis. In instances in which the determination of the fair value measurement is based on inputs from different levels of the fair value hierarchy, the level in the fair value hierarchy within which the entire fair value measurement falls is based on the lowest level of input that is significant to the fair value measurement in its entirety. Our assessment of the significance of the particular input to the fair value measurement in its entirety requires judgment and considers factors specific to the asset or liability.

The following tables set forth the assets and liabilities that we measure at fair value on a recurring and non-recurring basis by their levels in the fair value hierarchy at December 31, 2018 and 2017 (in thousands):

	December 31, 2018
	Total		Level 1		Level 2		Level 3
Assets:
Marketable securities	$	28,638	$	—	$	28,638	$	—
Interest rate cap and swap agreements (included in other assets)	$	18,676	$	—	$	18,676	$	—
Liabilities:
Interest rate cap and swap agreements (included in other liabilities)	$	7,663	$	—	$	7,663	$	—

	December 31, 2017
	Total		Level 1		Level 2		Level 3
Assets:
Marketable securities	$	28,579	$	—	$	28,579	$	—
Interest rate cap and swap agreements (included in other assets)	$	16,692	$	—	$	16,692	$	—

We determine impairment in real estate investments and debt and preferred equity investments, including intangibles primarily utilizing cash flow projections that apply, among other things, estimated revenue and expense growth rates, discount rates and capitalization rates, as well as sales comparison approach, which utilizes comparable sales, listings and sales contracts. All of which are classified as Level 3 inputs.

In December 2018, the Company determined that it was more likely than not that its suburban properties would be sold or otherwise disposed of significantly before the end of their previously estimated useful life. The Company tested the recoverability of the assets and, as a result of the carrying amount of the assets not being deemed recoverable and exceeding their fair value as measured on a asset by asset basis, recorded a $221.9 million impairment loss. These charges are included in depreciable real estate reserves and impairment in the consolidated statement of operations. The fair value of the assets were determined primarily utilizing cash flow projections that apply, among other things, estimated revenue and expense growth rates, discount rates and capitalization rates, as well as sales comparison approach, which utilizes comparable sales, listings and sales contracts. All of which are classified as Level 3 inputs.

In May 2018, the Company was the successful bidder at the foreclosure of 2 Herald Square, at which time the Company's $250.5 million outstanding principal balance and $7.7 million accrued interest balance receivables were credited to our equity investment in the property. We recorded the assets acquired and liabilities assumed at fair value. This resulted in the recognition of a fair value adjustment of $8.1 million, which is reflected on the Company's consolidated statement of operations within purchase price and other fair value adjustments. This fair value was determined by utilizing our successful bid at the foreclosure of the asset, the agreement to sell a partial interest in the property, and cash flow projections that apply, among other things, estimated revenue and expense growth rates, discount rates and capitalization rates, as well as a sales comparison approach, which utilizes comparable sales, listings and sales contracts, all of which are classified as Level 3 inputs.

In January 2018, the partnership agreement for our investment in 919 Third Avenue was modified resulting in the Company no longer having a controlling interest in this investment. As a result the investment was deconsolidated as of January 1, 2018. The Company recorded its non-controlling interest at fair value resulting in a $49.3 million fair value adjustment in the consolidated statement of operations. This fair value was determined using a third party valuation which primarily utilized cash flow projections that apply, among other things, estimated revenue and expense growth rates, discount rates and capitalization rates, as well as sales comparison approach, which utilizes comparable sales, listings and sales contracts. All of which are classified as Level 3 inputs.

Marketable securities classified as Level 1 are derived from quoted prices in active markets. The valuation technique used to measure the fair value of marketable securities classified as Level 2 were valued based on quoted market prices or model driven valuations using the significant inputs derived from or corroborated by observable market data. Marketable securities in an unrealized loss position are not considered to be other than temporarily impaired. We do not intend to sell these securities and it is not more likely than not that we will be required to sell the investments before recovery of their amortized cost bases.

The fair value of derivative instruments is based on current market data received from financial sources that trade such instruments and are based on prevailing market data and derived from third party proprietary models based on well-recognized financial principles and reasonable estimates about relevant future market conditions, which are classified as Level 2 inputs.

The financial assets and liabilities that are not measured at fair value on our consolidated balance sheets include cash and cash equivalents, restricted cash, accounts receivable, accounts payable and accrued expenses, debt and preferred equity investments, mortgages and other loans payable and other secured and unsecured debt. The carrying amount of cash and cash equivalents, restricted cash, accounts receivable, and accounts payable and accrued expenses reported in our consolidated balance sheets approximates fair value due to the short term nature of these instruments. The fair value of debt and preferred equity investments, which is classified as Level 3, is estimated by discounting the future cash flows using current interest rates at which similar loans with the same maturities would be made to borrowers with similar credit ratings. The fair value of borrowings, which is classified as Level 3, is estimated by discounting the contractual cash flows of each debt instrument to their present value using adjusted market interest rates, which is provided by a third-party specialist.

The following table provides the carrying value and fair value of these financial instruments as of December 31, 2018 and December 31, 2017 (in thousands):

	December 31, 2018				December 31, 2017
	Carrying Value (1)		Fair Value		Carrying Value (1)		Fair Value
Debt and preferred equity investments	$	2,099,393	(2)		$	2,114,041	(2)
Fixed rate debt	$	3,543,476	$	3,230,127	$	4,305,165	$	4,421,866
Variable rate debt	2,048,442		2,057,966		1,605,431		1,612,224
	$	5,591,918	$	5,288,093	$	5,910,596	$	6,034,090

(1) Amounts exclude net deferred financing costs.

(2) At December 31, 2018, debt and preferred equity investments had an estimated fair value ranging between $2.1 billion and $2.3 billion. At December 31, 2017, debt and preferred equity investments had an estimated fair value ranging between $2.1 billion and $2.3 billion.

Disclosure about fair value of financial instruments was based on pertinent information available to us as of December 31, 2018 and 2017. Although we are not aware of any factors that would significantly affect the reasonable fair value amounts, such amounts have not been comprehensively revalued for purposes of these financial statements since that date and current estimates of fair value may differ significantly from the amounts presented herein.

XML

Financial Instruments: Derivatives and Hedging

12 Months Ended

Dec. 31, 2018

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Financial Instruments: Derivatives and Hedging

Financial Instruments: Derivatives and Hedging

In the normal course of business, we use a variety of commonly used derivative instruments, such as interest rate swaps, caps, collar and floors, to manage, or hedge interest rate risk. We hedge our exposure to variability in future cash flows for forecasted transactions in addition to anticipated future interest payments on existing debt. We recognize all derivatives on the balance sheet at fair value. Derivatives that are not hedges are adjusted to fair value through earnings. If a derivative is a hedge, depending on the nature of the hedge, changes in the fair value of the derivative will either be offset against the change in fair value of the hedge asset, liability, or firm commitment through earnings, or recognized in other comprehensive income until the hedged item is recognized in earnings. The ineffective portion of a derivative's change in fair value will be immediately recognized in earnings. Reported net income and equity may increase or decrease prospectively, depending on future levels of interest rates and other variables affecting the fair values of derivative instruments and hedged items, but will have no effect on cash flows. Currently, all of our designated derivative instruments are effective hedging instruments.

The following table summarizes the notional value at inception and fair value of our consolidated derivative financial instruments at December 31, 2018 based on Level 2 information. The notional value is an indication of the extent of our involvement in these instruments at that time, but does not represent exposure to credit, interest rate or market risks (amounts in thousands).

	Notional Value		Strike Rate		Effective Date	Expiration Date	Balance Sheet Location	Fair Value
Interest Rate Swap	$	200,000	1.131	%	July 2016	July 2023	Other Assets	$	11,148
Interest Rate Swap	100,000		1.161	%	July 2016	July 2023	Other Assets	5,447
Interest Rate Cap	137,500		4.000	%	September 2017	September 2019	Other Assets	—
Interest Rate Swap	100,000		1.928	%	December 2017	November 2020	Other Assets	1,045
Interest Rate Swap	100,000		1.934	%	December 2017	November 2020	Other Assets	1,035
Interest Rate Swap	150,000		2.696	%	January 2019	January 2024	Other Liabilities	(1,858		)
Interest Rate Swap	150,000		2.721	%	January 2019	January 2026	Other Liabilities	(2,450		)
Interest Rate Swap	200,000		2.740	%	January 2019	January 2026	Other Liabilities	(3,354		)
								$	11,013

During the years ended December 31, 2018, 2017, and 2016, we recorded a $0.2 million loss, a $0.5 million loss, and a $0.5 million gain, respectively, on the changes in the fair value, which is included in interest expense in the consolidated statements of operations.

The Company has agreements with each of its derivative counterparties that contain a provision where if the Company either defaults or is capable of being declared in default on any of its indebtedness, then the Company could also be declared in default on its derivative obligations. As of December 31, 2018, the fair value of derivatives in a net liability position, including accrued interest but excluding any adjustment for nonperformance risk related to these agreements, was $7.7 million. As of December 31, 2018, the Company has not posted any collateral related to these agreements and was not in breach of any agreement provisions. If the Company had breached any of these provisions, it could have been required to settle its obligations under the agreements at their aggregate termination value of $7.7 million at December 31, 2018.

Gains and losses on terminated hedges are included in accumulated other comprehensive income, and are recognized into earnings over the term of the related mortgage obligation. Over time, the realized and unrealized gains and losses held in accumulated other comprehensive income will be reclassified into earnings as an adjustment to interest expense in the same periods in which the hedged interest payments affect earnings. We estimate that $2.5 million of the current balance held in accumulated other comprehensive income will be reclassified into interest expense and $0.6 million of the portion related to our share of joint venture accumulated other comprehensive income will be reclassified into equity in net income from unconsolidated joint ventures within the next 12 months.

The following table presents the effect of our derivative financial instruments and our share of our joint ventures' derivative financial instruments that are designated and qualify as hedging instruments on the consolidated statements of operations for the years ended December 31, 2018, 2017, and 2016, respectively (in thousands):

	Amount of (Loss) Gain Recognized in Other Comprehensive Loss (Effective Portion)								Location of Loss Reclassified from Accumulated Other Comprehensive Loss into Income	Amount of Loss Reclassified from Accumulated Other Comprehensive Loss into Income (Effective Portion)						Location of (Loss) Gain Recognized in Income on Derivative	Amount of (Loss) Gain  Recognized into Income (Ineffective Portion)
	Year Ended December 31,									Year Ended December 31,							Year Ended December 31,
Derivative	2018			2017			2016			2018		2017		2016			2018			2017		2016
Interest Rate Swaps/Caps	$	(2,284	)	$	(2,282	)	$	14,616	Interest expense	$	609	$	1,821	$	9,521	Interest expense	$	(559	)	$	5	$	(28	)
Share of unconsolidated joint ventures' derivative instruments	(1,788		)	(200		)	2,012		Equity in net income from unconsolidated joint ventures	726		1,035		1,981		Equity in net income from unconsolidated joint ventures	(371		)	55		785
	$	(4,072	)	$	(2,482	)	$	16,628		$	1,335	$	2,856	$	11,502		$	(930	)	$	60	$	757

XML

Rental Income

12 Months Ended

Dec. 31, 2018

Leases [Abstract]

Rental Income

Rental Income

The Operating Partnership is the lessor and the sublessor to tenants under operating leases with expiration dates ranging from January 1, 2019 to 2064. The minimum rental amounts due under the leases are generally either subject to scheduled fixed increases or adjustments. The leases generally also require that the tenants reimburse us for increases in certain operating costs and real estate taxes above their base year costs. Approximate future minimum rents to be received over the next five years and thereafter for non-cancelable operating leases in effect at December 31, 2018 for the consolidated properties, including consolidated joint venture properties, and our share of unconsolidated joint venture properties are as follows (in thousands):

	Consolidated Properties		Unconsolidated Properties
2019	$	830,336	$	348,060
2020	765,610		375,228
2021	625,956		380,886
2022	562,250		348,222
2023	500,499		333,501
Thereafter	3,272,014		2,098,995
	$	6,556,665	$	3,884,892

XML

Benefit Plans

12 Months Ended

Dec. 31, 2018

Retirement Benefits [Abstract]

Benefit Plans

Benefit Plans

The building employees are covered by multi-employer defined benefit pension plans and post-retirement health and welfare plans. We participate in the Building Service 32BJ, or Union, Pension Plan and Health Plan. The Pension Plan is a multi-employer, non-contributory defined benefit pension plan that was established under the terms of collective bargaining agreements between the Service Employees International Union, Local 32BJ, the Realty Advisory Board on Labor Relations, Inc. and certain other employees. This Pension Plan is administered by a joint board of trustees consisting of union trustees and employer trustees and operates under employer identification number 13-1879376. The Pension Plan year runs from July 1 to June 30. Employers contribute to the Pension Plan at a fixed rate on behalf of each covered employee. Separate actuarial information regarding such pension plans is not made available to the contributing employers by the union administrators or trustees, since the plans do not maintain separate records for each reporting unit. However, on September 28, 2016, September 28, 2017, and September 28, 2018, the actuary certified that for the plan years beginning July 1, 2016, July 1, 2017, and July 1, 2018, the Pension Plan was in critical status under the Pension Protection Act of 2006. The Pension Plan trustees adopted a rehabilitation plan consistent with this requirement. No surcharges have been paid to the Pension Plan as of December 31, 2018. For the Pension Plan years ended June 30, 2018, 2017, and 2016, the plan received contributions from employers totaling $272.3 million, $257.8 million, and $249.5 million. Our contributions to the Pension Plan represent less than 5.0% of total contributions to the plan.

The Health Plan was established under the terms of collective bargaining agreements between the Union, the Realty Advisory Board on Labor Relations, Inc. and certain other employers. The Health Plan provides health and other benefits to eligible participants employed in the building service industry who are covered under collective bargaining agreements, or other written agreements, with the Union. The Health Plan is administered by a Board of Trustees with equal representation by the employers and the Union and operates under employer identification number 13-2928869. The Health Plan receives contributions in accordance with collective bargaining agreements or participation agreements. Generally, these agreements provide that the employers contribute to the Health Plan at a fixed rate on behalf of each covered employee. For the Health Plan years ended, June 30, 2018, 2017, and 2016, the plan received contributions from employers totaling $1.4 billion, $1.3 billion and $1.2 billion, respectively. Our contributions to the Health Plan represent less than 5.0% of total contributions to the plan.

Contributions we made to the multi-employer plans for the years ended December 31, 2018, 2017 and 2016 are included in the table below (in thousands):

Benefit Plan	2018		2017		2016
Pension Plan	$	3,017	$	3,856	$	3,979
Health Plan	9,310		11,426		11,530
Other plans	1,106		1,463		1,583
Total plan contributions	$	13,433	$	16,745	$	17,092

401(K) Plan

In August 1997, we implemented a 401(K) Savings/Retirement Plan, or the 401(K) Plan, to cover eligible employees of ours, and any designated affiliate. The 401(K) Plan permits eligible employees to defer up to 15% of their annual compensation, subject to certain limitations imposed by the Code. The employees' elective deferrals are immediately vested and non-forfeitable upon contribution to the 401(K) Plan. During 2003, we amended our 401(K) Plan to provide for discretionary matching contributions only. For 2018, a matching contribution equal to 100% of the first 4% of annual compensation was made. For 2017 and 2016, a matching contribution equal to 50% of the first 6% of annual compensation was made. For the year ended December 31, 2018, we made a matching contribution of $1,075,267. For the years ended December 31, 2017 and 2016, we made matching contributions of $1,011,830 and $906,875, respectively.

XML

Commitments and Contingencies

12 Months Ended

Dec. 31, 2018

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

Commitments and Contingencies

Legal Proceedings

As of December 31, 2018, the Company and the Operating Partnership were not involved in any material litigation nor, to management's knowledge, was any material litigation threatened against us or our portfolio which if adversely determined could have a material adverse impact on us.

Environmental Matters

Our management believes that the properties are in compliance in all material respects with applicable Federal, state and local ordinances and regulations regarding environmental issues. Management is not aware of any environmental liability that it believes would have a materially adverse impact on our financial position, results of operations or cash flows. Management is unaware of any instances in which it would incur significant environmental cost if any of our properties were sold.

Employment Agreements

We have entered into employment agreements with certain executives, which expire between February 2020 and January 2022. The minimum cash-based compensation, including base salary and guaranteed bonus payments, associated with these employment agreements total $3.3 million for 2019.

Insurance

We maintain “all-risk” property and rental value coverage (including coverage regarding the perils of flood, earthquake and terrorism, excluding nuclear, biological, chemical, and radiological terrorism ("NBCR")), within three property insurance programs and liability insurance. Separate property and liability coverage may be purchased on a stand-alone basis for certain assets, such as the development of One Vanderbilt. Additionally, one of our captive insurance companies, Belmont Insurance Company, or Belmont, provides coverage for NBCR terrorist acts above a specified trigger. Belmont's retention is reinsured by our other captive insurance company, Ticonderoga Insurance Company ("Ticonderoga"). If Belmont or Ticonderoga are required to pay a claim under our insurance policies, we would ultimately record the loss to the extent of required payments. However, there is no assurance that in the future we will be able to procure coverage at a reasonable cost. Further, if we experience losses that are uninsured or that exceed policy limits, we could lose the capital invested in the damaged properties as well as the anticipated future cash flows from those properties. Additionally, our debt instruments contain customary covenants requiring us to maintain insurance and we could default under debt our instruments if the cost and/or availability of certain types of insurance make it impractical or impossible to comply with such covenants relating to insurance. Belmont and Ticonderoga provide coverage solely on properties owned by the Company or its affiliates.

Furthermore, with respect to certain of our properties, including properties held by joint ventures, or subject to triple net leases, insurance coverage is obtained by a third-party and we do not control the coverage. While we may have agreements with such third parties to maintain adequate coverage and we monitor these policies, such coverage ultimately may not be maintained or adequately cover our risk of loss.

Belmont had loss reserves of $4.0 million and $5.5 million as of December 31, 2018 and 2017, respectively. Ticonderoga had no loss reserves as of December 31, 2018.

Capital and Ground Leases Arrangements

In 2015, we entered into a ground lease for the land and building located at 30 East 40th Street with a lease term ending in August 2114. Based on our evaluation of the arrangement under ASC 840, land was estimated to be approximately 63.6% of the fair market value of the property. The portion attributable to land was classified as operating lease with an expiration date of 2114 ($76.0 million total over the lease term attributed to ground rent) and the remainder as a capital lease in the amount of $20.0 million. The ground rent will reset in 2035.

The property located at 420 Lexington Avenue operates under a ground lease ($10.9 million of ground rent annually through December 2019, $11.2 million of ground rent annually through December 2029, and $12.3 million annually afterwards, subject to a one-time adjustment based on 6% of the fair value of the land) with an expiration date of 2050 and two options to renew for an additional 30 years.

The property located at 1080 Amsterdam Avenue operates under a ground and capital lease with an expiration date of 2111 ($41.6 million total over the lease term attributed to ground rent). Land was estimated to be 40.0% of the fair market value of the property, which was classified as an operating lease. The remainder was classified as a capital lease. The ground rent will reset in 2038.

The property located at 711 Third Avenue operates under an operating sub-lease with an expiration date of 2033 and five options to renew for an additional 10 years each. The ground rent was reset in July 2011. Following the reset, we were responsible for ground rent payments of $5.25 million annually through July 2016 and then $5.5 million annually thereafter on the 50% portion of the fee that we do not own. The ground rent will reset in July 2021 to the greater of $5.5 million or 7.75% of the fair value of the land.

The property located at 461 Fifth Avenue operates under a ground lease ($2.1 million of ground rent annually) with an expiration date of 2027 and two options to renew for an additional 21 years each, followed by a third option for 15 years. We also have an option to purchase the fee position for a fixed price on a specific date.

The property located at 625 Madison Avenue operates under a ground lease ($4.6 million of ground rent annually) with an expiration date of 2022 and two options to renew for an additional 32 years.

The property located at 1185 Avenue of the Americas operates under a ground lease ($6.9 million of ground rent annually) with an expiration date of 2043.

The property located at 1055 Washington Boulevard operates under a ground lease ($0.6 million of ground rent annually) with an expiration date of 2090.

The following is a schedule of future minimum lease payments under capital leases and non-cancellable operating leases with initial terms in excess of one year as of December 31, 2018 (in thousands):

	Capital lease			Non-cancellable operating leases (1)
2019	$	2,411		$	31,066
2020	2,620			31,436
2021	2,794			31,628
2022	2,794			29,472
2023	2,794			27,166
Thereafter	817,100			676,090
Total minimum lease payments	$	830,513		$	826,858
Amount representing interest	(786,897		)
Capital lease obligations	$	43,616

(1) As of December 31, 2018, the total minimum sublease rentals to be received in the future under non-cancellable subleases is $1.7 billion.

XML

Segment Information

12 Months Ended

Dec. 31, 2018

Segment Reporting [Abstract]

Segment Information

Segment Information

The Company has two reportable segments, real estate and debt and preferred equity investments. We evaluate real estate performance and allocate resources based on earnings contributions.

The primary sources of revenue are generated from tenant rents and escalations and reimbursement revenue. Real estate property operating expenses consist primarily of security, maintenance, utility costs, insurance, real estate taxes and ground rent expense (at certain applicable properties). See Note 5, "Debt and Preferred Equity Investments," for additional details on our debt and preferred equity investments.

Selected consolidated results of operations for the years ended December 31, 2018, 2017, and 2016, and selected asset information as of December 31, 2018 and 2017, regarding our operating segments are as follows (in thousands):

	Real Estate Segment			Debt and Preferred Equity Segment		Total Company
Total revenues
Years ended:
December 31, 2018	$	1,025,900		$	201,492	$	1,227,392
December 31, 2017	1,317,602			193,871		1,511,473
December 31, 2016	1,650,973			213,008		1,863,981
Net Income
Years ended:
December 31, 2018	$	129,253		$	141,603	$	270,856
December 31, 2017	(69,294		)	170,363		101,069
December 31, 2016	74,655			204,256		278,911
Total assets
As of:
December 31, 2018	$	10,481,594		$	2,269,764	$	12,751,358
December 31, 2017	11,598,438			2,384,466		13,982,904

Interest costs for the debt and preferred equity segment include actual costs incurred for borrowings on the 2016 MRA and 2017 MRA. Interest is imputed on the investments that do not collateralize the 2016 MRA or 2017 MRA using our weighted average corporate borrowing cost. We also allocate loan loss reserves, net of recoveries, and transaction related costs to the debt and preferred equity segment. We do not allocate marketing, general and administrative expenses to the debt and preferred equity segment since the use of personnel and resources is dependent on transaction volume between the two segments and varies period over period. In addition, we base performance on the individual segments prior to allocating marketing, general and administrative expenses. For the years ended, December 31, 2018, 2017, and 2016 marketing, general and administrative expenses totaled $92.6 million, $100.5 million, and $99.8 million respectively. All other expenses, except interest, relate entirely to the real estate assets.

There were no transactions between the above two segments.

XML

Quarterly Financial Data of the Company (unaudited)

12 Months Ended

Dec. 31, 2018

Quarterly Financial Information Disclosure [Abstract]

Quarterly Financial Data of the Company/Operating Partnership (unaudited)

Quarterly Financial Data of the Company (unaudited)

Summarized quarterly financial data for the years ended December 31, 2018 and 2017 was as follows (in thousands, except for per share amounts):

2018 Quarter Ended	December 31			September 30			June 30			March 31
Total revenues	$	317,036		$	307,545		$	301,116		$	301,695
Total expenses	(267,678		)	(265,553		)	(258,303		)	(258,282		)
Equity in net income from unconsolidated joint ventures	(2,398		)	971			4,702			4,036
Equity in net gain (loss) on sale of interest in unconsolidated joint venture/real estate	167,445			70,937			72,025			(6,440		)
Gain (loss) on sale of real estate, net	(36,984		)	(2,504		)	(14,790		)	23,521
Purchase price and other fair value adjustments	—			(3,057		)	11,149			49,293
Depreciable real estate reserves and impairment	(220,852		)	(6,691		)	—			—
Loss on early extinguishment of debt	(14,889		)	(2,194		)	—			—
Noncontrolling interests and preferred unit distributions	838			(7,507		)	(8,606		)	(8,319		)
Net income attributable to SL Green	(57,482		)	91,947			107,293			105,504
Perpetual preferred stock dividends	(3,737		)	(3,738		)	(3,737		)	(3,738		)
Net (loss) income attributable to SL Green common stockholders	$	(61,219	)	$	88,209		$	103,556		$	101,766
Net (loss) income attributable to common stockholders per common share—basic	$	(0.73	)	$	1.03		$	1.19		$	1.12
Net (loss) income attributable to common stockholders per common share—diluted	$	(0.73	)	$	1.03		$	1.19		$	1.12

2017 Quarter Ended	December 31			September 30			June 30			March 31
Total revenues	$	361,342		$	374,600		$	398,150		$	377,381
Total expenses	(314,108		)	(333,913		)	(365,749		)	(332,675		)
Equity in net income from unconsolidated joint ventures	7,788			4,078			3,412			6,614
Equity in net gain on sale of interest in unconsolidated joint venture/real estate	—			1,030			13,089			2,047
Gain (loss) on sale of real estate, net	76,497			—			(3,823		)	567
Depreciable real estate reserves and impairment	(93,184		)	—			(29,064		)	(56,272		)
Gain on the sale of investment in marketable securities	—			—			—			3,262
Noncontrolling interests and preferred unit distributions	(6,616		)	(3,188		)	(4,056		)	14,165
Net income attributable to SL Green	31,719			42,607			11,959			15,089
Perpetual preferred stock dividends	(3,737		)	(3,738		)	(3,737		)	(3,738		)
Net income attributable to SL Green common stockholders	$	27,982		$	38,869		$	8,222		$	11,351
Net income attributable to common stockholders per common share—basic	$	0.29		$	0.40		$	0.08		$	0.11
Net income attributable to common stockholders per common share—diluted	$	0.29		$	0.40		$	0.08		$	0.11

XML

Quarterly Financial Data of the Operating Partnership (unaudited)

12 Months Ended

Dec. 31, 2018

Condensed Income Statements, Captions [Line Items]

Quarterly Financial Data of the Company/Operating Partnership (unaudited)

Quarterly Financial Data of the Company (unaudited)

Summarized quarterly financial data for the years ended December 31, 2018 and 2017 was as follows (in thousands, except for per share amounts):

2018 Quarter Ended	December 31			September 30			June 30			March 31
Total revenues	$	317,036		$	307,545		$	301,116		$	301,695
Total expenses	(267,678		)	(265,553		)	(258,303		)	(258,282		)
Equity in net income from unconsolidated joint ventures	(2,398		)	971			4,702			4,036
Equity in net gain (loss) on sale of interest in unconsolidated joint venture/real estate	167,445			70,937			72,025			(6,440		)
Gain (loss) on sale of real estate, net	(36,984		)	(2,504		)	(14,790		)	23,521
Purchase price and other fair value adjustments	—			(3,057		)	11,149			49,293
Depreciable real estate reserves and impairment	(220,852		)	(6,691		)	—			—
Loss on early extinguishment of debt	(14,889		)	(2,194		)	—			—
Noncontrolling interests and preferred unit distributions	838			(7,507		)	(8,606		)	(8,319		)
Net income attributable to SL Green	(57,482		)	91,947			107,293			105,504
Perpetual preferred stock dividends	(3,737		)	(3,738		)	(3,737		)	(3,738		)
Net (loss) income attributable to SL Green common stockholders	$	(61,219	)	$	88,209		$	103,556		$	101,766
Net (loss) income attributable to common stockholders per common share—basic	$	(0.73	)	$	1.03		$	1.19		$	1.12
Net (loss) income attributable to common stockholders per common share—diluted	$	(0.73	)	$	1.03		$	1.19		$	1.12

2017 Quarter Ended	December 31			September 30			June 30			March 31
Total revenues	$	361,342		$	374,600		$	398,150		$	377,381
Total expenses	(314,108		)	(333,913		)	(365,749		)	(332,675		)
Equity in net income from unconsolidated joint ventures	7,788			4,078			3,412			6,614
Equity in net gain on sale of interest in unconsolidated joint venture/real estate	—			1,030			13,089			2,047
Gain (loss) on sale of real estate, net	76,497			—			(3,823		)	567
Depreciable real estate reserves and impairment	(93,184		)	—			(29,064		)	(56,272		)
Gain on the sale of investment in marketable securities	—			—			—			3,262
Noncontrolling interests and preferred unit distributions	(6,616		)	(3,188		)	(4,056		)	14,165
Net income attributable to SL Green	31,719			42,607			11,959			15,089
Perpetual preferred stock dividends	(3,737		)	(3,738		)	(3,737		)	(3,738		)
Net income attributable to SL Green common stockholders	$	27,982		$	38,869		$	8,222		$	11,351
Net income attributable to common stockholders per common share—basic	$	0.29		$	0.40		$	0.08		$	0.11
Net income attributable to common stockholders per common share—diluted	$	0.29		$	0.40		$	0.08		$	0.11

SL Green Operating Partnership

Condensed Income Statements, Captions [Line Items]

Quarterly Financial Data of the Company/Operating Partnership (unaudited)

Quarterly Financial Data of the Operating Partnership (unaudited)

Summarized quarterly financial data for the years ended December 31, 2018 and 2017 was as follows (in thousands, except for per share amounts):

2018 Quarter Ended	December 31			September 30			June 30			March 31
Total revenues	$	317,036		$	307,545		$	301,116		$	301,695
Total expenses	(267,678		)	(265,553		)	(258,303		)	(258,282		)
Equity in net (loss) income from unconsolidated joint ventures	(2,398		)	971			4,702			4,036
Equity in net gain (loss) on sale of interest in unconsolidated joint venture/real estate	167,445			70,937			72,025			(6,440		)
(Loss) gain on sale of real estate, net	(36,984		)	(2,504		)	(14,790		)	23,521
Purchase price and other fair value adjustments	—			(3,057		)	11,149			49,293
Depreciable real estate reserves and impairment	(220,852		)	(6,691		)	—			—
Loss on early extinguishment of debt	(14,889		)	(2,194		)	—			—
Noncontrolling interests and preferred unit distributions	(2,601		)	(2,710		)	(3,020		)	(3,047		)
Net income attributable to SLOP	(60,921		)	96,744			112,879			110,776
Perpetual preferred units distributions	(3,737		)	(3,738		)	(3,737		)	(3,738		)
Net (loss) income attributable to SLGOP common unitholders	$	(64,658	)	$	93,006		$	109,142		$	107,038
Net (loss) income attributable to common unitholders per common share—basic	$	(0.73	)	$	1.03		$	1.19		$	1.12
Net (loss) income attributable to common unitholders per common share—diluted	$	(0.73	)	$	1.03		$	1.19		$	1.12

2017 Quarter Ended	December 31			September 30			June 30			March 31
Total revenues	$	361,342		$	374,600		$	398,150		$	377,381
Total expenses	(314,108		)	(333,913		)	(365,749		)	(332,675		)
Equity in net income from unconsolidated joint ventures	7,788			4,078			3,412			6,614
Equity in net gain on sale of interest in unconsolidated joint venture/real estate	—			1,030			13,089			2,047
Gain (loss) on sale of real estate, net	76,497			—			(3,823		)	567
Depreciable real estate reserves and impairment	(93,184		)	—			(29,064		)	(56,272		)
Gain on the sale of investment in marketable securities	—			—			—			3,262
Noncontrolling interests and preferred unit distributions	(5,328		)	(1,376		)	(3,637		)	14,641
Net income attributable to SLOP	33,007			44,419			12,378			15,565
Perpetual preferred units distributions	(3,737		)	(3,738		)	(3,737		)	(3,738		)
Net income attributable to SLGOP common unitholders	$	29,270		$	40,681		$	8,641		$	11,827
Net income attributable to common unitholders per common share—basic	$	0.29		$	0.40		$	0.08		$	0.11
Net income attributable to common unitholders per common share—diluted	$	0.29		$	0.40		$	0.08		$	0.11

XML

Schedule II - Valuation and Qualifying Accounts

12 Months Ended

Dec. 31, 2018

SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]

Schedule II - Valuation and Qualifying Accounts

Column A	Column B		Column C		Column D			Column E
Description	Balance at Beginning of Year		Additions Charged Against Operations		Uncollectible Accounts Written-off/Recovery (1)			Balance at End of Year
Year Ended December 31, 2018
Tenant and other receivables—allowance	$	18,637	$	3,726	$	(6,661	)	$	15,702
Deferred rent receivable—allowance	$	17,207	$	491	$	(2,241	)	$	15,457
Year Ended December 31, 2017
Tenant and other receivables—allowance	$	16,592	$	6,106	$	(4,061	)	$	18,637
Deferred rent receivable—allowance	$	25,203	$	2,321	$	(10,317	)	$	17,207
Year Ended December 31, 2016
Tenant receivables—allowance	$	17,618	$	10,630	$	(11,656	)	$	16,592
Deferred rent receivable—allowance	$	21,730	$	13,620	$	(10,147	)	$	25,203

(1) Includes the effect of properties that were sold and/or deconsolidated within the period.

XML

Schedule III - Real Estate and Accumulated Depreciation

12 Months Ended

Dec. 31, 2018

SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation Disclosure [Abstract]

Schedule III - Real Estate and Accumulated Depreciation

Column A	Column B		Column C Initial Cost				Column D Cost Capitalized Subsequent To Acquisition						Column E Gross Amount at Which Carried at Close of Period						Column F		Column G	Column H	Column I
Description	Encumbrances		Land		Building & Improvements		Land			Building & Improvements			Land		Building & Improvements		Total		Accumulated Depreciation		Date of Construction	Date Acquired	Life on  Which Depreciation is Computed
420 Lexington Ave(1)	$	300,000	$	—	$	107,832	$	—		$	225,667		$	—	$	333,499	$	333,499	$	133,978	1927	3/1998	Various
711 Third Avenue(1)	—		19,844		42,499		—			73,270			19,844		115,769		135,613		45,066		1955	5/1998	Various
555 W. 57th Street(1)	—		18,846		78,704		—			62,242			18,846		140,946		159,792		69,817		1971	1/1999	Various
220 East 42nd Street(1)	—		50,373		203,727		635			161,705			51,008		365,432		416,440		108,450		1929	2/2003	Various
461 Fifth Avenue(1)	—		—		62,695		—			25,581			—		88,276		88,276		29,680		1988	10/2003	Various
750 Third Avenue(1)	—		51,093		205,972		—			45,551			51,093		251,523		302,616		101,854		1958	7/2004	Various
625 Madison Avenue(1)	—		—		246,673		—			44,646			—		291,319		291,319		118,380		1956	10/2004	Various
485 Lexington Avenue(1)	450,000		77,517		326,825		765			125,806			78,282		452,631		530,913		183,003		1956	12/2004	Various
609 Fifth Avenue(1)	—		36,677		145,954		—			49,527			36,677		195,481		232,158		43,777		1925	6/2006	Various
810 Seventh Avenue(1)	—		114,077		476,386		—			74,433			114,077		550,819		664,896		176,354		1970	1/2007	Various
1185 Avenue of the Americas(1)	—		—		728,213		—			62,893			—		791,106		791,106		265,896		1969	1/2007	Various
1350 Avenue of the Americas(1)	—		91,038		380,744		(97		)	50,773			90,941		431,517		522,458		136,853		1966	1/2007	Various
100 Summit Lake Drive(2)	—		10,526		43,109		(3,337		)	(94		)	7,189		43,015		50,204		18,936		1988	1/2007	Various
200 Summit Lake Drive(2)	—		11,183		47,906		(5,321		)	(9,102		)	5,862		38,804		44,666		21,203		1990	1/2007	Various
500 Summit Lake Drive(2)	—		9,777		39,048		(3,601		)	(7,875		)	6,176		31,173		37,349		14,523		1986	1/2007	Various
360 Hamilton Avenue(2)	—		29,497		118,250		(2,625		)	8,005			26,872		126,255		153,127		43,901		2000	1/2007	Various
1-6 Landmark Square(3)	100,000		50,947		195,167		(23,095		)	(33,824		)	27,852		161,343		189,195		79,012		1973-1984	1/2007	Various
7 Landmark Square(3)	—		2,088		7,748		(367		)	669			1,721		8,417		10,138		1,539		2007	1/2007	Various
1010 Washington Boulevard(3)	—		7,747		30,423		(1,259		)	2,928			6,488		33,351		39,839		12,489		1988	1/2007	Various
1055 Washington Boulevard(3)	—		13,516		53,228		(5,130		)	(9,986		)	8,386		43,242		51,628		20,382		1987	6/2007	Various
1 Madison Avenue(1)	—		172,641		654,394		905			18,411			173,546		672,805		846,351		193,033		1960	8/2007	Various
100 Church Street(1)	213,208		32,494		79,996		2,500			103,936			34,994		183,932		218,926		53,269		1959	1/2010	Various
125 Park Avenue(1)	—		120,900		189,714		—			80,884			120,900		270,598		391,498		77,542		1923	10/2010	Various
Williamsburg(4)	—		3,677		14,708		2,523			(4,550		)	6,200		10,158		16,358		2,127		2010	12/2010	Various
110 East 42nd Street(1)	—		34,000		46,411		2,196			31,942			36,196		78,353		114,549		17,400		1921	5/2011	Various
400 East 58th Street(1)(5)	39,931		17,549		30,916		—			7,833			17,549		38,749		56,298		6,119		1929	1/2012	Various
752 Madison Avenue(1)	—		282,415		7,131		1,871			1,183			284,286		8,314		292,600		1,380		1996/2012	1/2012	Various
762 Madison Avenue(1)(5)	771		6,153		10,461		—			109			6,153		10,570		16,723		1,884		1910	1/2012	Various
19-21 East 65th Street(1)	—		—		7,389		—			1,100			—		8,489		8,489		1,228		1928-1940	1/2012	Various
304 Park Avenue(1)	—		54,189		75,619		300			15,024			54,489		90,643		145,132		19,315		1930	6/2012	Various
635 Sixth Avenue(1)	—		24,180		37,158		163			51,103			24,343		88,261		112,604		10,931		1902	9/2012	Various
641 Sixth Avenue(1)	—		45,668		67,316		308			9,760			45,976		77,076		123,052		15,891		1902	9/2012	Various
1080 Amsterdam(1)(6)	35,807		—		27,445		—			20,503			—		47,948		47,948		5,441		1932	10/2012	Various
315 West 33rd Street(1)	250,000		195,834		164,429		—			15,133			195,834		179,562		375,396		25,397		2000-2001	11/2013	Various
562 Fifth Avenue(1)	—		57,052		10,487		—			1,213			57,052		11,700		68,752		4,458		1909/1920/1921	11/2013	Various

Column A	Column B		Column C Initial Cost				Column D Cost Capitalized Subsequent To Acquisition						Column E Gross Amount at Which Carried at Close of Period						Column F		Column G	Column H	Column I
Description	Encumbrances		Land		Building & Improvements		Land			Building & Improvements			Land		Building & Improvements		Total		Accumulated Depreciation		Date of Construction	Date Acquired	Life on  Which Depreciation is Computed
719 Seventh Avenue(1)(7)	50,000		41,850		—		(670		)	46,232			41,180		46,232		87,412		3,025		1927	7/2014	Various
115 Spring Street(1)	65,550		11,078		44,799		—			1,850			11,078		46,649		57,727		5,248		1900	7/2014	Various
1640 Flatbush Avenue(4)	—		6,226		501		—			503			6,226		1,004		7,230		50		1966	3/2015	Various
110 Greene Street(1)(5)	—		45,120		215,470		—			12,923			45,120		228,393		273,513		23,683		1910	7/2015	Various
185 Broadway(1)(8)	111,869		13,400		34,175		32,022			(6,310		)	45,422		27,865		73,287		419		1921	8/2015	Various
30 East 40th Street(1)(9)	—		4,650		20,000		2			6,654			4,652		26,654		31,306		2,017		1927	8/2015	Various
133 Greene Street(1)	15,523		3,446		27,542		—			—			3,446		27,542		30,988		119		1900	10/2018	Various
712 Madison Avenue(1)	28,000		7,207		47,397		—			—			7,207		47,397		54,604		—		1900/1980	12/2018	Various
Other(10)	—		1,738		16,225		(2		)	(1		)	1,736		16,224		17,960		4,068
Total	$	1,660,659	$	1,776,213	$	5,370,786	$	(1,314	)	$	1,368,250		$	1,774,899	$	6,739,036	$	8,513,935	$	2,099,137

(1) Property located in New York, New York.

(2) Property located in Westchester County, New York.

(3) Property located in Connecticut.

(4) Property located in Brooklyn, New York.

(5) We own a 90.0% interest in this property.

(6) We own a 92.5% interest in this property.

(7) We own a 75.0% interest in this property.

(8) Properties at 5-7 Dey Street, 183 Broadway, and 185 Broadway were demolished in preparation of the development site for the 185 Broadway project.

(9) We own a 60.0% interest in this property.

(10) Other includes tenant improvements of eEmerge, capitalized interest and corporate improvements.

The changes in real estate for the years ended December 31, 2018, 2017 and 2016 are as follows (in thousands):

	2018			2017			2016
Balance at beginning of year	$	10,206,122		$	12,743,332		$	16,681,602
Property acquisitions	52,939			13,323			29,230
Improvements	267,726			342,014			426,060
Retirements/disposals/deconsolidation	(2,012,852		)	(2,892,547		)	(4,393,560		)
Balance at end of year	$	8,513,935		$	10,206,122		$	12,743,332

The aggregate cost of land, buildings and improvements, before depreciation, for Federal income tax purposes at December 31, 2018 was $9.9 billion (unaudited).

The changes in accumulated depreciation, exclusive of amounts relating to equipment, autos, and furniture and fixtures, for the years ended December 31, 2018, 2017 and 2016 are as follows (in thousands):

	2018			2017			2016
Balance at beginning of year	$	2,300,116		$	2,264,694		$	2,060,706
Depreciation for year	245,033			347,015			353,502
Retirements/disposals/deconsolidation	(446,012		)	(311,593		)	(149,514		)
Balance at end of year	$	2,099,137		$	2,300,116		$	2,264,694

XML

Significant Accounting Policies (Policies)

12 Months Ended

Dec. 31, 2018

Accounting Policies [Abstract]

Principles of Consolidation

Principles of Consolidation

The consolidated financial statements include our accounts and those of our subsidiaries, which are wholly-owned or controlled by us. Entities which we do not control through our voting interest and entities which are variable interest entities, but where we are not the primary beneficiary, are accounted for under the equity method. See Note 5, "Debt and Preferred Equity Investments" and Note 6, "Investments in Unconsolidated Joint Ventures." All significant intercompany balances and transactions have been eliminated.

We consolidate a VIE in which we are considered the primary beneficiary. The primary beneficiary is the entity that has (i) the power to direct the activities that most significantly impact the entity's economic performance and (ii) the obligation to absorb losses of the VIE or the right to receive benefits from the VIE that could be significant to the VIE.

A noncontrolling interest in a consolidated subsidiary is defined as the portion of the equity (net assets) in a subsidiary not attributable, directly or indirectly, to us. Noncontrolling interests are required to be presented as a separate component of equity in the consolidated balance sheet and the presentation of net income is modified to present earnings and other comprehensive income attributed to controlling and noncontrolling interests.

We assess the accounting treatment for each joint venture and debt and preferred equity investment. This assessment includes a review of each joint venture or limited liability company agreement to determine the rights provided to each party and whether those rights are protective or participating. For all VIEs, we review such agreements in order to determine which party has the power to direct the activities that most significantly impact the entity's economic performance. In situations where we and our partner approve, among other things, the annual budget, receive a detailed monthly reporting package, meet on a quarterly basis to review the results of the joint venture, review and approve the joint venture's tax return before filing, and approve all leases that cover more than a nominal amount of space relative to the total rentable space at each property, we do not consolidate the joint venture as we consider these to be substantive participation rights that result in shared power of the activities that most significantly impact the performance of the joint venture. Our joint venture agreements typically contain certain protective rights such as requiring partner approval to sell, finance or refinance the property and the payment of capital expenditures and operating expenditures outside of the approved budget or operating plan.

Investment in Commercial Real Estate Properties

Investment in Commercial Real Estate Properties

Real estate properties are presented at cost less accumulated depreciation and amortization. Costs directly related to the development or redevelopment of properties are capitalized. Ordinary repairs and maintenance are expensed as incurred; major replacements and betterments, which improve or extend the life of the asset, are capitalized and depreciated over their estimated useful lives.

We recognize the assets acquired, liabilities assumed (including contingencies) and any noncontrolling interests in an acquired entity at their respective fair values on the acquisition date. When we acquire our partner's equity interest in an existing unconsolidated joint venture and gain control over the investment, we record the consolidated investment at fair value. The difference between the book value of our equity investment on the purchase date and our share of the fair value of the investment's purchase price is recorded as a purchase price fair value adjustment in our consolidated statements of operations. See Note 3, "Property Acquisitions."

We allocate the purchase price of real estate to land and building (inclusive of tenant improvements) and, if determined to be material, intangibles, such as the value of above- and below-market leases and origination costs associated with the in-place leases. We depreciate the amount allocated to building (inclusive of tenant improvements) over their estimated useful lives, which generally range from three to 40 years. We amortize the amount allocated to the above- and below-market leases over the remaining term of the associated lease, which generally range from one to 14 years, and record it as either an increase (in the case of below-market leases) or a decrease (in the case of above-market leases) to rental income. We amortize the amount allocated to the values associated with in-place leases over the expected term of the associated lease, which generally ranges from one to 14 years. If a tenant vacates its space prior to the contractual termination of the lease and no rental payments are being made on the lease, any unamortized balance of the related intangible will be written off. The tenant improvements and origination costs are amortized as an expense over the remaining life of the lease (or charged against earnings if the lease is terminated prior to its contractual expiration date). We assess fair value of the leases based on estimated cash flow projections that utilize appropriate discount and capitalization rates and available market information. Estimates of future cash flows are based on a number of factors including the historical operating results, known trends, and market/economic conditions that may affect the property. To the extent acquired leases contain fixed rate renewal options that are below-market and determined to be material, we amortize such below-market lease value into rental income over the renewal period. As of December 31, 2018, the weighted average amortization period for above-market leases, below-market leases, and in-place lease costs is 1.8 years, 4.6 years, and 5.8 years, respectively.

We incur a variety of costs in the development and leasing of our properties. After the determination is made to capitalize a cost, it is allocated to the specific component of a project that is benefited. Determination of when a development project is substantially complete and capitalization must cease involves a degree of judgment. The costs of land and building under development include specifically identifiable costs. The capitalized costs include, but are not limited to, pre-construction costs essential to the development of the property, development costs, construction costs, interest costs, real estate taxes, salaries and related costs and other costs incurred during the period of development. We consider a construction project as substantially completed and held available for occupancy upon the completion of tenant improvements, but no later than one year after major construction activity ceases. We cease capitalization on the portions substantially completed and occupied or held available for occupancy, and capitalize only those costs associated with the portions under construction.

Properties are depreciated using the straight-line method over the estimated useful lives of the assets. The estimated useful lives are as follows:

Category	Term
Building (fee ownership)	40 years
Building improvements	shorter of remaining life of the building or useful life
Building (leasehold interest)	lesser of 40 years or remaining term of the lease
Property under capital lease	remaining lease term
Furniture and fixtures	four to seven years
Tenant improvements	shorter of remaining term of the lease or useful life

Depreciation expense (including amortization of capital lease assets) totaled $242.8 million, $365.3 million, and $783.5 million for the years ended December 31, 2018, 2017 and 2016, respectively.

On a periodic basis, we assess whether there are any indications that the value of our real estate properties may be impaired or that their carrying value may not be recoverable. A property's value is considered impaired if management's estimate of the aggregate future cash flows (undiscounted) to be generated by the property is less than the carrying value of the property. To the extent impairment has occurred, the loss will be measured as the excess of the carrying amount of the property over the calculated fair value of the property.

We also evaluate our real estate properties for impairment when a property has been classified as held for sale. Real estate assets held for sale are valued at the lower of their carrying value or fair value less costs to sell and depreciation expense is no longer recorded.

Cash and Cash Equivalents

Cash and Cash Equivalents

We consider all highly liquid investments with maturity of three months or less when purchased to be cash equivalents.

Fair Value Measurements

Fair Value Measurements

We are required to disclose fair value information with regard to our financial instruments, whether or not recognized in the consolidated balance sheets, for which it is practical to estimate fair value. The FASB guidance defines fair value as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants on the measurement date. We measure and/or disclose the estimated fair value of financial assets and liabilities based on a hierarchy that distinguishes between market participant assumptions based on market data obtained from sources independent of the reporting entity and the reporting entity’s own assumptions about market participant assumptions. This hierarchy consists of three broad levels: Level 1 - quoted prices (unadjusted) in active markets for identical assets or liabilities that the reporting entity can access at the measurement date; Level 2 - inputs other than quoted prices included within Level 1, that are observable for the asset or liability, either directly or indirectly; and Level 3 - unobservable inputs for the asset or liability that are used when little or no market data is available. We follow this hierarchy for our assets and liabilities measured at fair value on a recurring and nonrecurring basis. In instances in which the determination of the fair value measurement is based on inputs from different levels of the fair value hierarchy, the level in the fair value hierarchy within which the entire fair value measurement falls is based on the lowest level of input that is significant to the fair value measurement in its entirety. Our assessment of the significance of the particular input to the fair value measurement in its entirety requires judgment and considers factors specific to the asset or liability.

We determine impairment in real estate investments and debt and preferred equity investments, including intangibles primarily utilizing cash flow projections that apply, among other things, estimated revenue and expense growth rates, discount rates and capitalization rates, as well as sales comparison approach, which utilizes comparable sales, listings and sales contracts. All of which are classified as Level 3 inputs.

In December 2018, the Company determined that it was more likely than not that its suburban properties would be sold or otherwise disposed of significantly before the end of their previously estimated useful life. The Company tested the recoverability of the assets and, as a result of the carrying amount of the assets not being deemed recoverable and exceeding their fair value as measured on a asset by asset basis, recorded a $221.9 million impairment loss. These charges are included in depreciable real estate reserves and impairment in the consolidated statement of operations. The fair value of the assets were determined primarily utilizing cash flow projections that apply, among other things, estimated revenue and expense growth rates, discount rates and capitalization rates, as well as sales comparison approach, which utilizes comparable sales, listings and sales contracts. All of which are classified as Level 3 inputs.

In May 2018, the Company was the successful bidder at the foreclosure of 2 Herald Square, at which time the Company's $250.5 million outstanding principal balance and $7.7 million accrued interest balance receivables were credited to our equity investment in the property. We recorded the assets acquired and liabilities assumed at fair value. This resulted in the recognition of a fair value adjustment of $8.1 million, which is reflected on the Company's consolidated statement of operations within purchase price and other fair value adjustments. This fair value was determined by utilizing our successful bid at the foreclosure of the asset, the agreement to sell a partial interest in the property, and cash flow projections that apply, among other things, estimated revenue and expense growth rates, discount rates and capitalization rates, as well as a sales comparison approach, which utilizes comparable sales, listings and sales contracts, all of which are classified as Level 3 inputs.

In January 2018, the partnership agreement for our investment in 919 Third Avenue was modified resulting in the Company no longer having a controlling interest in this investment. As a result the investment was deconsolidated as of January 1, 2018. The Company recorded its non-controlling interest at fair value resulting in a $49.3 million fair value adjustment in the consolidated statement of operations. This fair value was determined using a third party valuation which primarily utilized cash flow projections that apply, among other things, estimated revenue and expense growth rates, discount rates and capitalization rates, as well as sales comparison approach, which utilizes comparable sales, listings and sales contracts. All of which are classified as Level 3 inputs.

Marketable securities classified as Level 1 are derived from quoted prices in active markets. The valuation technique used to measure the fair value of marketable securities classified as Level 2 were valued based on quoted market prices or model driven valuations using the significant inputs derived from or corroborated by observable market data. Marketable securities in an unrealized loss position are not considered to be other than temporarily impaired. We do not intend to sell these securities and it is not more likely than not that we will be required to sell the investments before recovery of their amortized cost bases.

The fair value of derivative instruments is based on current market data received from financial sources that trade such instruments and are based on prevailing market data and derived from third party proprietary models based on well-recognized financial principles and reasonable estimates about relevant future market conditions, which are classified as Level 2 inputs.

The financial assets and liabilities that are not measured at fair value on our consolidated balance sheets include cash and cash equivalents, restricted cash, accounts receivable, accounts payable and accrued expenses, debt and preferred equity investments, mortgages and other loans payable and other secured and unsecured debt. The carrying amount of cash and cash equivalents, restricted cash, accounts receivable, and accounts payable and accrued expenses reported in our consolidated balance sheets approximates fair value due to the short term nature of these instruments. The fair value of debt and preferred equity investments, which is classified as Level 3, is estimated by discounting the future cash flows using current interest rates at which similar loans with the same maturities would be made to borrowers with similar credit ratings. The fair value of borrowings, which is classified as Level 3, is estimated by discounting the contractual cash flows of each debt instrument to their present value using adjusted market interest rates, which is provided by a third-party specialist.

Restricted Cash

Restricted Cash

Restricted cash primarily consists of security deposits held on behalf of our tenants, interest reserves, as well as capital improvement and real estate tax escrows required under certain loan agreements.

Investment in Marketable Securities

Investment in Marketable Securities

At acquisition, we designate a security as held-to-maturity, available-for-sale, or trading. As of December 31, 2018, we did not have any securities designated as held-to-maturity or trading. We account for our available-for-sale securities at fair value pursuant to Accounting Standards Codification, or ASC, 820-10, with the net unrealized gains or losses reported as a component of accumulated other comprehensive income or loss. The cost of marketable securities sold and the amount reclassified out of accumulated other comprehensive income into earnings is determined using the specific identification method. Any unrealized losses that are determined to be other-than-temporary are recognized in earnings up to their credit component.

The Company adopted ASU 2016-01 effective January 1, 2018 which required entities to measure investments in equity securities at fair value and recognize any changes in fair value in net income. Upon adoption we did not hold investments in equity securities and therefore did not record a cumulative-effect adjustment. We did not hold investments in equity securities as of December 31, 2018.

Investments in Unconsolidated Joint Ventures

Investments in Unconsolidated Joint Ventures

We account for our investments in unconsolidated joint ventures under the equity method of accounting in cases where we exercise significant influence over, but do not control, these entities and are not considered to be the primary beneficiary. We consolidate those joint ventures that we control or which are VIEs and where we are considered to be the primary beneficiary. In all these joint ventures, the rights of the joint venture partner are both protective as well as participating. Unless we are determined to be the primary beneficiary in a VIE, these participating rights preclude us from consolidating these VIE entities. These investments are recorded initially at cost, as investments in unconsolidated joint ventures, and subsequently adjusted for equity in net income (loss) and cash contributions and distributions. Equity in net income (loss) from unconsolidated joint ventures is allocated based on our ownership or economic interest in each joint venture and includes adjustments related to basis differences that were identified as part of the initial accounting for the investment. When a capital event (as defined in each joint venture agreement) such as a refinancing occurs, if return thresholds are met, future equity income will be allocated at our increased economic interest. We recognize incentive income from unconsolidated real estate joint ventures as income to the extent it is earned and not subject to a clawback feature. Distributions we receive from unconsolidated real estate joint ventures in excess of our basis in the investment are recorded as offsets to our investment balance if we remain liable for future obligations of the joint venture or may otherwise be committed to provide future additional financial support. None of the joint venture debt is recourse to us. The Company has performance guarantees under a master lease at one joint venture. See Note 6, "Investments in Unconsolidated Joint Ventures."

We assess our investments in unconsolidated joint ventures for recoverability, and if it is determined that a loss in value of the investment is other than temporary, we write down the investment to its fair value. We evaluate our equity investments for impairment based on the joint ventures' projected discounted cash flows. We do not believe that the values of any of our equity investments were impaired at December 31, 2018.

We may originate loans for real estate acquisition, development and construction, where we expect to receive some of the residual profit from such projects. When the risk and rewards of these arrangements are essentially the same as an investor or joint venture partner, we account for these arrangements as real estate investments under the equity method of accounting for investments. Otherwise, we account for these arrangements consistent with the accounting for our debt and preferred equity investments.

Deferred Lease Costs

Deferred Lease Costs

Deferred lease costs consist of fees and direct costs incurred to execute operating leases and are amortized on a straight-line basis over the related lease term. Certain of our employees provide leasing services to the wholly-owned properties.

Deferred Financing Costs

Deferred Financing Costs

Deferred financing costs represent commitment fees, legal, title and other third party costs associated with obtaining commitments for financing which result in a closing of such financing. These costs are amortized over the terms of the respective agreements. Unamortized deferred financing costs are expensed when the associated debt is refinanced or repaid before maturity. Costs incurred in seeking financing transactions, which do not close, are expensed in the period in which it is determined that the financing will not close. Deferred financing costs related to a recognized debt liability are presented in the balance sheet as a direct deduction from the carrying amount of that debt liability.

Revenue Recognition

Revenue Recognition

Rental revenue is recognized on a straight-line basis over the term of the lease. Rental revenue recognition commences when the tenant takes possession or controls the physical use of the leased space. In order for the tenant to take possession, the leased space must be substantially ready for its intended use. To determine whether the leased space is substantially ready for its intended use, management evaluates whether we are or the tenant is the owner of tenant improvements for accounting purposes. When management concludes that we are the owner of tenant improvements, rental revenue recognition begins when the tenant takes possession of the finished space, which is when such tenant improvements are substantially complete. In certain instances, when management concludes that we are not the owner (the tenant is the owner) of tenant improvements, rental revenue recognition begins when the tenant takes possession of or controls the space. When management concludes that we are the owner of tenant improvements for accounting purposes, we record amounts funded to construct the tenant improvements as a capital asset. For these tenant improvements, we record amounts reimbursed by tenants as a reduction of the capital asset. When management concludes that the tenant is the owner of tenant improvements for accounting purposes, we record our contribution towards those improvements as a lease incentive, which is included in deferred costs, net on our consolidated balance sheets and amortized as a reduction to rental revenue on a straight-line basis over the term of the lease. The excess of rents recognized over amounts contractually due pursuant to the underlying leases are included in deferred rents receivable on the consolidated balance sheets. We establish, on a current basis, an allowance for future potential tenant credit losses, which may occur against this account. The balance reflected on the consolidated balance sheets is net of such allowance.

In addition to base rent, our tenants also generally will pay their pro rata share of increases in real estate taxes and operating expenses for the building over a base year. In some leases, in lieu of paying additional rent based upon increases in building operating expenses, the tenant will pay additional rent based upon increases in the wage rate paid to porters over the porters' wage rate in effect during a base year or increases in the consumer price index over the index value in effect during a base year. In addition, many of our leases contain fixed percentage increases over the base rent to cover escalations. Electricity is most often supplied by the landlord either on a sub-metered basis, or rent inclusion basis (i.e., a fixed fee is included in the rent for electricity, which amount may increase based upon increases in electricity rates or increases in electrical usage by the tenant). Base building services other than electricity (such as heat, air conditioning and freight elevator service during business hours, and base building cleaning) are typically provided at no additional cost, with the tenant paying additional rent only for services which exceed base building services or for services which are provided outside normal business hours. These escalations are based on actual expenses incurred in the prior calendar year. If the expenses in the current year are different from those in the prior year, then during the current year, the escalations will be adjusted to reflect the actual expenses for the current year.

We record a gain on sale of real estate assets when we no longer hold a controlling financial interest in the entity holding the real estate, a contract exists with a third party and that third party has control of the assets acquired.

Investment income on debt and preferred equity investments is accrued based on the contractual terms of the instruments and when, in the opinion of management, it is deemed collectible. Some debt and preferred equity investments provide for accrual of interest at specified rates, which differ from current payment terms. Interest is recognized on such loans at the accrual rate subject to management's determination that accrued interest is ultimately collectible, based on the underlying collateral and operations of the borrower. If management cannot make this determination, interest income above the current pay rate is recognized only upon actual receipt.

Deferred origination fees, original issue discounts and loan origination costs, if any, are recognized as an adjustment to interest income over the terms of the related investments using the effective interest method. Fees received in connection with loan commitments are also deferred until the loan is funded and are then recognized over the term of the loan as an adjustment to yield. Discounts or premiums associated with the purchase of loans are amortized or accreted into interest income as a yield adjustment on the effective interest method based on expected cash flows through the expected maturity date of the related investment. If we purchase a debt or preferred equity investment at a discount, intend to hold it until maturity and expect to recover the full value of the investment, we accrete the discount into income as an adjustment to yield over the term of the investment. If we purchase a debt or preferred equity investment at a discount with the intention of foreclosing on the collateral, we do not accrete the discount. For debt investments acquired at a discount for credit quality, the difference between contractual cash flows and expected cash flows at acquisition is not accreted. Anticipated exit fees, the collection of which is expected, are also recognized over the term of the loan as an adjustment to yield.

Debt and preferred equity investments are placed on a non-accrual status at the earlier of the date at which payments become 90 days past due or when, in the opinion of management, a full recovery of interest income becomes doubtful. Interest income recognition on any non-accrual debt or preferred equity investment is resumed when such non-accrual debt or preferred equity investment becomes contractually current and performance is demonstrated to be resumed. Interest is recorded as income on impaired loans only to the extent cash is received.

We may syndicate a portion of the loans that we originate or sell the loans individually. When a transaction meets the criteria for sale accounting, we derecognize the loan sold and recognize gain or loss based on the difference between the sales price and the carrying value of the loan sold. Any related unamortized deferred origination fees, original issue discounts, loan origination costs, discounts or premiums at the time of sale are recognized as an adjustment to the gain or loss on sale, which is included in investment income on the consolidated statement of operations. Any fees received at the time of sale or syndication are recognized as part of investment income.

Asset management fees are recognized on a straight-line basis over the term of the asset management agreement.

Allowance for Doubtful Accounts

Allowance for Doubtful Accounts

We maintain an allowance for doubtful accounts for estimated losses resulting from the inability of our tenants to make required payments. If the financial condition of a specific tenant were to deteriorate, resulting in an impairment of its ability to make payments, additional allowances may be required.

Allowance for Loan Loss and Other Investment Reserves

Allowance for Loan Loss and Other Investment Reserves

The expense for loan loss and other investment reserves in connection with debt and preferred equity investments is the charge to earnings to adjust the allowance for possible losses to the level that we estimate to be adequate, based on Level 3 data, considering delinquencies, loss experience and collateral quality.

The Company evaluates debt and preferred equity investments that are classified as held to maturity for possible impairment or credit deterioration associated with the performance and/or value of the underlying collateral property as well as the financial and operating capability of the borrower/sponsor. Quarterly, the Company assigns each loan a risk rating. Based on a 3-point scale, loans are rated “1” through “3,” from less risk to greater risk, which ratings are defined as follows: 1 - Low Risk Assets - Low probability of loss, 2 - Watch List Assets - Higher potential for loss, 3 - High Risk Assets - Loss more likely than not.

When it is probable that we will be unable to collect all amounts contractually due, the investment is considered impaired. A valuation allowance is measured based upon the excess of the recorded investment amount over the fair value of the collateral. Any deficiency between the carrying amount of an asset and the calculated value of the collateral is charged to expense. We continue to assess or adjust our estimates based on circumstances of a loan and the underlying collateral. If additional information reflects increased recovery of our investment, we will adjust our reserves accordingly.

Debt and preferred equity investments that are classified as held for sale are carried at the lower of cost or fair market value using available market information obtained through consultation with dealers or other originators of such investments as well as discounted cash flow models based on Level 3 data pursuant to ASC 820-10. As circumstances change, management may conclude not to sell an investment designated as held for sale. In such situations, the investment will be reclassified at its net carrying value to debt and preferred equity investments held to maturity. For these reclassified investments, the difference between the current carrying value and the expected cash to be collected at maturity will be accreted into income over the remaining term of the investment.

Rent Expense

Rent Expense

Rent expense is recognized on a straight-line basis over the initial term of the lease. The excess of the rent expense recognized over the amounts contractually due pursuant to the underlying lease is included in the deferred lease payable on the consolidated balance sheets.

Underwriting Commissions and Costs

Underwriting Commissions and Costs

Underwriting commissions and costs incurred in connection with our stock offerings are reflected as a reduction of additional paid-in-capital.

Exchangeable Debt Instruments

Exchangeable Debt Instruments

The initial proceeds from exchangeable debt that may be settled in cash, including partial cash settlements, are bifurcated between a liability component and an equity component associated with the embedded conversion option. The objective of the accounting guidance is to require the liability and equity components of exchangeable debt to be separately accounted for in amanner such that the interest expense on the exchangeable debt is not recorded at the stated rate of interest but rather at an effective rate that reflects the issuer's conventional debt borrowing rate at the date of issuance. We calculate the liability component of exchangeable debt based on the present value of the contractual cash flows discounted at our comparable market conventional debt borrowing rate at the date of issuance. The difference between the principal amount and the fair value of the liability component is reported as a discount on the exchangeable debt that is accreted as additional interest expense from the issuance date through the contractual maturity date using the effective interest method. A portion of this additional interest expense may be capitalized to the development and redevelopment balances qualifying for interest capitalization each period. The liability component of the exchangeable debt is reported net of discounts on our consolidated balance sheets. We calculate the equity component of exchangeable debt based on the difference between the initial proceeds received from the issuance of the exchangeable debt and the fair value of the liability component at the issuance date. The equity component is included in additional paid-in-capital, net of issuance costs, on our consolidated balance sheets. We allocate issuance costs for exchangeable debt between the liability and the equity components based on their relative values.

Transaction cost

Transaction Costs

In January 2017, we adopted ASU No. 2017-01, Business Combinations: Clarifying the Definition of a Business, which changed how we account for transaction costs. Prior to January 2017, transaction costs were expensed as incurred. Starting in January 2017, transaction costs for asset acquisitions are capitalized to the investment basis which is then subject to a purchase price allocation based on relative fair value and transaction costs for business combinations or costs incurred on potential transactions which are not consummated are expensed as incurred.

Income Taxes

Income Taxes

SL Green is taxed as a REIT under Section 856(c) of the Code. As a REIT, SL Green generally is not subject to Federal income tax. To maintain its qualification as a REIT, SL Green must distribute at least 90% of its REIT taxable income to its stockholders and meet certain other requirements. If SL Green fails to qualify as a REIT in any taxable year, SL Green will be subject to Federal income tax on its taxable income at regular corporate rates. SL Green may also be subject to certain state, local and franchise taxes. Under certain circumstances, Federal income and excise taxes may be due on its undistributed taxable income.

The Operating Partnership is a partnership and, as a result, all income and losses of the partnership are allocated to the partners for inclusion in their respective income tax returns. The only provision for income taxes included in the consolidated statements of operations relates to the Operating Partnership’s consolidated taxable REIT subsidiaries. The Operating Partnership may also be subject to certain state, local and franchise taxes.

We have elected, and may elect in the future, to treat certain of our corporate subsidiaries as taxable REIT subsidiaries, or TRSs. In general, TRSs may perform non-customary services for the tenants of the Company, hold assets that we cannot hold directly and generally may engage in any real estate or non-real estate related business. The TRSs generate income, resulting in Federal and state income tax liability for these entities.

During the years ended December 31, 2018, 2017 and 2016, we recorded Federal, state and local tax provisions of $2.8 million, $4.3 million, and $2.8 million, respectively. For the year ended December 31, 2018, the Company paid distributions on its common stock of $3.25 per share which represented $1.46 per share of ordinary income and $1.79 per share of capital gains. For the year ended December 31, 2017, the Company paid distributions on its common stock of $3.10 per share which represented $1.24 per share of ordinary income, and $1.86 per share of capital gains. For the year ended December 31, 2016, the Company paid distributions on its common stock of $2.88 per share which represented $2.48 per share of ordinary income and $0.40 per share of capital gains.

We follow a two-step approach for evaluating uncertain tax positions. Recognition (step one) occurs when an enterprise concludes that a tax position, based solely on its technical merits, is more-likely-than-not to be sustained upon examination. Measurement (step two) determines the amount of benefit that is more-likely-than-not to be realized upon settlement. Derecognition of a tax position that was previously recognized would occur when a company subsequently determines that a tax position no longer meets the more-likely-than-not threshold of being sustained. The use of a valuation allowance as a substitute for derecognition of tax positions is prohibited.

On December 22, 2017, the Tax Cuts and Jobs Act (the ‘‘Tax Act’’) was signed into law and makes substantial changes to the Code. The Tax Act has not had a material impact on our financial statements for the years ended December 31, 2018 or December 31, 2017.

Stock-Based Employee Compensation Plans

Stock-Based Employee Compensation Plans

We have a stock-based employee compensation plan, described more fully in Note 14, "Share-based Compensation."

The Company's stock options are recorded at fair value at the time of issuance. Fair value of the stock options is determined using the Black-Scholes option pricing model. The Black-Scholes model was developed for use in estimating the fair value of traded options, which have no vesting restrictions and are fully transferable. In addition, option valuation models require the input of highly subjective assumptions including the expected stock price volatility. Because our plan has characteristics significantly different from those of traded options and because changes in the subjective input assumptions can materially affect the fair value estimate, in our opinion, the existing models do not necessarily provide a reliable single measure of the fair value of the employee stock options.

Compensation cost for stock options, if any, is recognized over the vesting period of the award. Our policy is to grant options with an exercise price equal to the quoted closing market price of the Company's common stock on either the grant date or the date immediately preceding the grant date. Awards of stock or restricted stock are expensed as compensation over the benefit period based on the fair value of the stock on the grant date.

For share-based awards with a performance or market measure, we recognize compensation cost over the requisite service period, using the accelerated attribution expense method. The requisite service period begins on the date the compensation committee of our board of directors authorizes the award, adopts any relevant performance measures and communicates the award to the employees. For programs with awards that vest based on the achievement of a performance condition or market condition, we determine whether it is probable that the performance condition will be met, and estimate compensation cost based on the fair value of the award at the applicable award date estimated using a binomial model or market quotes. For share-based awards for which there is no pre-established performance measure, we recognize compensation cost over the service vesting period, which represents the requisite service period, on a straight-line basis. In accordance with the provisions of our share-based incentive compensation plans, we accept the return of shares of the Company's common stock, at the current quoted market price, from certain key employees to satisfy minimum statutory tax-withholding requirements related to shares that vested during the period.

Awards can also be made in the form of a separate series of units of limited partnership interest in the Operating Partnership called long-term incentive plan units, or LTIP units. LTIP units, which can be granted either as free-standing awards or in tandem with other awards under our stock incentive plan, are valued by reference to the value of the Company's common stock at the time of grant, and are subject to such conditions and restrictions as the compensation committee of the Company's board of directors may determine, including continued employment or service, computation of financial metrics and/or achievement of pre-established performance goals and objectives.

Derivative Instruments

Derivative Instruments

In the normal course of business, we use a variety of commonly used derivative instruments, such as interest rate swaps, caps, collars and floors, to manage, or hedge, interest rate risk. Effectiveness is essential for those derivatives that we intend to qualify for hedge accounting. Some derivative instruments are associated with an anticipated transaction. In those cases, hedge effectiveness criteria also require that it be probable that the underlying transaction occurs. Instruments that meet these hedging criteria are formally designated as hedges at the inception of the derivative contract.

To determine the fair values of derivative instruments, we use a variety of methods and assumptions that are based on market conditions and risks existing at each balance sheet date. For the majority of financial instruments including most derivatives, long-term investments and long-term debt, standard market conventions and techniques such as discounted cash flow analysis, option pricing models, replacement cost, and termination cost are used to determine fair value. All methods of assessing fair value result in a general approximation of value, and such value may never actually be realized.

In the normal course of business, we are exposed to the effect of interest rate changes and limit these risks by following established risk management policies and procedures including the use of derivatives. To address exposure to interest rates, derivatives are used primarily to fix the rate on debt based on floating-rate indices and manage the cost of borrowing obligations.

We use a variety of conventional derivative products. These derivatives typically include interest rate swaps, caps, collars and floors. We expressly prohibit the use of unconventional derivative instruments and using derivative instruments for trading or speculative purposes. Further, we have a policy of only entering into contracts with major financial institutions based upon their credit ratings and other factors.

We may employ swaps, forwards or purchased options to hedge qualifying forecasted transactions. Gains and losses related to these transactions are deferred and recognized in net income as interest expense in the same period or periods that the underlying transaction occurs, expires or is otherwise terminated.

Hedges that are reported at fair value and presented on the balance sheet could be characterized as cash flow hedges or fair value hedges. Interest rate caps and collars are examples of cash flow hedges. Cash flow hedges address the risk associated with future cash flows of interest payments. For all hedges held by us and which were deemed to be fully effective in meeting the hedging objectives established by our corporate policy governing interest rate risk management, no net gains or losses were reported in earnings. The changes in fair value of hedge instruments are reflected in accumulated other comprehensive income. For derivative instruments not designated as hedging instruments, the gain or loss, resulting from the change in the estimated fair value of the derivative instruments, is recognized in current earnings during the period of change.

Earnings per Share of the Company

Earnings per Share of the Company

The Company presents both basic and diluted earnings per share, or EPS, using the two-class method, which is an earnings allocation formula that determines EPS for common stock and any participating securities according to dividends declared (whether paid or unpaid). Under the two-class method, basic EPS is computed by dividing the income available to common stockholders by the weighted-average number of common stock shares outstanding for the period. Basic EPS includes participating securities, consisting of unvested restricted stock that receive nonforfeitable dividends similar to shares of common stock. Diluted EPS reflects the potential dilution that could occur if securities or other contracts to issue common stock were exercised or converted into common stock, where such exercise or conversion would result in a lower EPS amount. Diluted EPS also includes units of limited partnership interest. The dilutive effect of stock options is reflected in the weighted average diluted outstanding shares calculation by application of the treasury stock method. There was no dilutive effect for the exchangeable senior notes as the conversion premium was to be paid in cash.

Earnings per Unit of the Operating Partnership

Earnings per Unit of the Operating Partnership

The Operating Partnership presents both basic and diluted earnings per unit, or EPU, using the two-class method, which is an earnings allocation formula that determines EPU for common units and any participating securities according to dividends declared (whether paid or unpaid). Under the two-class method, basic EPU is computed by dividing the income available to common unitholders by the weighted-average number of common units outstanding for the period. Basic EPU includes participating securities, consisting of unvested restricted units that receive nonforfeitable dividends similar to shares of common units. Diluted EPU reflects the potential dilution that could occur if securities or other contracts to issue common units were exercised or converted into common units, where such exercise or conversion would result in a lower EPU amount. The dilutive effect of unit options is reflected in the weighted average diluted outstanding units calculation by application of the treasury stock method. There was no dilutive effect for the exchangeable senior notes as the conversion premium was to be paid in cash.

Use of Estimates

Use of Estimates

The preparation of financial statements in conformity with accounting principles generally accepted in the United States requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Actual results could differ from those estimates.

Concentrations of Credit Risk

Concentrations of Credit Risk

Financial instruments that potentially subject us to concentrations of credit risk consist primarily of cash investments, debt and preferred equity investments and accounts receivable. We place our cash investments with high quality financial institutions. The collateral securing our debt and preferred equity investments is located in the New York metropolitan area. See Note 5, "Debt and Preferred Equity Investments."

We perform ongoing credit evaluations of our tenants and require most tenants to provide security deposits or letters of credit. Though these security deposits and letters of credit are insufficient to meet the total value of a tenant's lease obligation, they are a measure of good faith and a source of funds to offset the economic costs associated with lost revenue and the costs associated with re-tenanting a space. The properties in our real estate portfolio are located in the New York metropolitan area. The tenants located in our buildings operate in various industries.

Reclassification

Reclassification

Certain prior year balances have been reclassified to conform to our current year presentation.

Accounting Standards Updates

Accounting Standards Updates

In October 2018, the FASB issued Accounting Standard Update (ASU) No. 2018-17, Consolidation (Topic 810), Targeted Improvements to Related Party Guidance for Variable Interest Entities. Under this amendment reporting entities, when determining if the decision-making fees are variable interests, are to consider indirect interests held through related parties under common control on a proportional basis rather than as a direct interest in its entirety. The guidance is effective for the Company for fiscal years beginning after December 15, 2019. Early adoption is permitted. The Company has adopted this guidance and it had no impact on the Company’s consolidated financial statements.

In August 2018, The Securities and Exchange Commission adopted a final rule that eliminated or amended disclosure requirements that were redundant or outdated in light of changes in its requirements, generally accepted accounting principles, or changes in the business environment. The commission also referred certain disclosure requirements to the Financial Accounting Standards Board for potential incorporation into generally accepted accounting principles. The rule is effective for filings after November 5, 2018. The Company assessed the impact of this rule and determined that the changes resulted in clarification or expansion of existing requirements. The Company early adopted the rule upon publication to the federal register on October 5, 2018 and it did not have a material impact on the Company’s consolidated financial statements.

In August 2018, the FASB issued Accounting Standard Update (ASU) No. 2018-15, Intangibles - Goodwill and Other- Internal-Use Software (Topic 350-40), Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That is a Service Contract. The amendments provide guidance on accounting for fees paid when the arrangement includes a software license and align the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing costs to develop or obtain internal-use software. The guidance is effective for the Company for fiscal years beginning after December 15, 2019. Early adoption is permitted. The Company has not yet adopted this new guidance and does not expect it to have a material impact on the Company’s consolidated financial statements when the new standard is implemented.

In August 2018, the FASB issued ASU No. 2018-13, Fair Value Measurement (Topic 820), Disclosure Framework - Changes to the Disclosure Requirements for Fair Value Measurement. This amendment removed, modified and added the disclosure requirements under Topic 820. The changes are effective for the Company for fiscal years beginning after December 15, 2019. Early adoption is permitted for the removed or modified disclosures with adoption of the additional disclosures upon the effective date. The Company has not yet adopted this new guidance and does not expect it to have a material impact on the Company’s consolidated financial statements when the new standard is implemented.

In June 2018, the FASB issued ASU No. 2018-07, Compensation - Stock Compensation (Topic 718), Improvements to Nonemployee Share-Based Payment Accounting. This amendment provides additional guidance related to share-based payment transactions for acquiring goods or services from nonemployees. The guidance is effective for the Company for fiscal years beginning after December 15, 2018, including the interim periods within that fiscal year. The Company will adopt this guidance January 1, 2019 and does not expect it to have a material impact on the Company’s consolidated financial statements.

In February 2018, the FASB issued ASU No. 2018-03, Technical Corrections and Improvements to Financial Instruments- Overall (Subtopic 825-10), Recognition and Measurement of Financial Assets and Financial Liabilities. These amendments provide additional guidance related to equity securities without a readily determinable fair value, forward contracts and options purchased on those equity securities and fair value option liabilities. The Company adopted the guidance on July 1, 2018, and it did not have a material impact on the Company’s consolidated financial statements.

In August 2017, the FASB issued ASU No. 2017-12, Derivatives and Hedging (Topic 815), Targeted Improvements to Accounting for Hedging Activities, and in July 2018, the FASB issued ASU No. 2018-16, Derivatives and Hedging (Topic 815): Inclusion of the Secured Overnight Financing Rate (SOFR) Overnight Index Swap (OIS) Rate as a Benchmark Interest Rate for Hedge Accounting Purposes. The amendments in the new standards will permit more flexibility in hedging interest rate risk for both variable rate and fixed rate financial instruments. The standards will also enhance the presentation of hedge results in the financial statements. The guidance is effective for fiscal years beginning after December 15, 2018. Early adoption is permitted. The Company will adopt this guidance January 1, 2019, and does not expect a material impact on the Company’s consolidated financial statements when the new standards are implemented.

In May 2017, the FASB issued ASU No. 2017-09, Compensation - Stock Compensation (Topic 718), Scope of Modification Accounting. The guidance clarifies the changes to the terms or conditions of a share-based payment award that require an entity to apply modification accounting in Topic 718. The Company adopted the guidance on January 1, 2018 and it had no impact on the Company's consolidated financial statements.

In November 2016, the FASB issued ASU No. 2016-18, Statement of Cash Flows (Topic 230): Restricted Cash. The guidance requires that the statement of cash flows explain the change during the period in the total of cash, cash equivalents, and amounts generally described as restricted cash. As a result, entities will no longer present transfers between these items on the statement of cash flows. The Company adopted the guidance on January 1, 2018 and has included the changes in restricted cash when reconciling the beginning-of-period and end-of-period total amounts on the statement of cash flows.

In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments and in November 2018 issued ASU No. 2018-19, Codification Improvements to Topic 326, Financial Instruments - Credit Losses. . The guidance changes how entities will measure credit losses for most financial assets and certain other instruments that are not measured at fair value through net income. The guidance replaces the current ‘incurred loss’ model with an ‘expected loss’ approach. The guidance is effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. Early adoption is permitted after December 15, 2018. The Company’s DPE portfolio and capital lease assets will be subject to this guidance once the Company adopts it. ASU No. 2018-19 excludes operating lease receivables from the scope of this guidance. The Company continues to evaluate the impact of adopting this new accounting standard on the Company’s consolidated financial statements.

In February 2016, the FASB issued ASU No. 2016-02, Leases. In July 2018, the FASB issued ASU No. 2018-10 - Codification Improvements to Topic 842, Leases and ASU No. 2018-11 - Targeted Improvements. In December 2018, the FASB issued ASU No. 2018-20 - Narrow-Scope Improvements for Lessors. This guidance requires lessees to recognize lease assets and lease liabilities for those leases classified as operating leases under the previous standard. Depending on the lease classification, lessees will recognize expense based on the effective interest method for finance leases or on a straight-line basis for operating leases. The Company will apply this guidance to the ground leases under which the Company is lessee. The Company is required to record a liability for the obligation to make payments under the lease and an asset for the right to use the underlying asset during the lease term and will also apply the new expense recognition requirements given the lease classification. While the Company is continuing to assess all potential impacts of the standard, we expect total liabilities and total assets to increase by $0.4 to $0.5 billion as of the date of adoption. The accounting applied by a lessor is largely unchanged from that applied under the previous standard. The Company does expect to adopt the practical expedient offered in ASU No. 2018-11 that allows lessors to not separate non-lease components from the related lease components under certain conditions, which the Company expects most of its leases to qualify for. Additionally, for future leases, the Company will no longer capitalize internal leasing costs as these costs are not considered to be incremental under the new guidance. The Company is assessing all potential impacts of the standard and currently estimates a decrease in net income of approximately $10.0 million related to this change based on its initial assessment. This guidance in this standard is effective for fiscal years beginning after December 15, 2018 and interim periods within those fiscal years. Early adoption is permitted. The Company will adopt this guidance January 1, 2019 and will apply the modified retrospective approach. The Company will elect the package of practical expedients that allows an entity to not reassess (i) whether any expired or existing contracts are or contain leases, (ii) lease classification for any expired or existing leases and (iii) initial direct costs for any expired or existing leases.

In January 2016, the FASB issued ASU 2016-01 (Subtopic 825-10), Recognition and Measurement of Financial Assets and Financial Liabilities. The guidance requires entities to measure equity investments that do not result in consolidation and are not accounted for under the equity method at fair value through earnings, to record changes in instrument-specific credit risk for financial liabilities measured under the fair value option in other comprehensive income, use the exit price notion when measuring an instrument’s fair value for disclosure and to separately present financial assets and liabilities by measurement category and form of instrument on the balance sheet or in the notes to the financial statements. The Company adopted the guidance effective January 1, 2018, and it had no impact on the Company’s consolidated financial statements.

In May 2014, the FASB issued a new comprehensive revenue recognition guidance which requires us to recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which we expect to be entitled in exchange for those goods and services (ASU 2014-09). The FASB also issued implementation guidance in March 2016, April 2016 and May 2016 - ASU’s 2016-08, 2016-10 and 2016-12, respectively. The Company adopted this guidance on January 1, 2018. Since the Company’s revenue is related to leasing activities, the adoption of this guidance did not have a material impact on the consolidated financial statements. The new guidance is applicable to service contracts with joint ventures for which the Company earns property management fees, leasing commissions and development and construction fees. The adoption of this new guidance did not change the accounting for these fees as the pattern of recognition of revenue does not change with the new guidance. We will continue to recognize revenue over time on these contracts because the customer simultaneously receives and consumes the benefits provided by our performance.

In February 2017, the FASB issued ASU No. 2017-05 to clarify the scope of asset derecognition guidance in Subtopic 610-20, which also provided guidance on accounting for partial sales of nonfinancial assets.  Subtopic 610-20 was issued in May 2014 as part of ASU 2014-09.  The Company adopted this guidance on January 1, 2018, and applied the modified retrospective approach. The Company elected to adopt the practical expedient under ASC 606, Revenue from Contracts with Customers, which allows an entity to apply the guidance only to contracts with non-customers that are open based on ASU 360-20, Real Estate Sales, (i.e. failed sales) as of the adoption date.   The Company had one open contract in 2017 with a non-customer that was evaluated under ASC 610-20.  The Company entered into an agreement to sell a portion of their interest in an entity that held a controlling interest in the property at 1515 Broadway.  Upon execution of the agreement in 2017, the transaction was evaluated under ASC 360-20, Real Estate Sales, and did not meet the criteria for sale accounting.  Upon adoption of ASC 606, this contract met the criteria for sale accounting under ASC 610-20. Through the sale, the Company no longer retains a controlling interest, as defined in ASC 810, Consolidation, and the impact of this adjustment is a gain of $0.6 billion from the sale of the partial interest and related step-up in basis to fair value of the non-controlling interest retained. This was recorded in the first quarter of 2018 as an adjustment to beginning retained earnings.

XML

Organization and Basis of Presentation (Tables)

12 Months Ended

Dec. 31, 2018

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Schedule of interests in properties

As of December 31, 2018, we owned the following interests in properties in the New York metropolitan area, primarily in midtown Manhattan. Our investments located outside of Manhattan are referred to as the Suburban properties:

		Consolidated			Unconsolidated		Total
Location	Property Type	Number of Properties		Approximate Square Feet (unaudited)	Number of Properties	Approximate Square Feet (unaudited)	Number of Properties	Approximate Square Feet (unaudited)	Weighted Average Occupancy(1) (unaudited)
Commercial:
Manhattan	Office	20		12,387,091	10	11,329,183	30	23,716,274	94.5	%
	Retail	7	(2)	325,648	9	352,174	16	677,822	96.7	%
	Development/Redevelopment	5		486,101	2	347,000	7	833,101	54.1	%
	Fee Interest	—		—	1	—	1	—	—	%
		32		13,198,840	22	12,028,357	54	25,227,197	93.2	%
Suburban	Office	13		2,295,200	—	—	13	2,295,200	91.3	%
	Retail	1		52,000	—	—	1	52,000	100.0	%
	Development/Redevelopment	1		1,000	—	—	1	1,000	—	%
		15		2,348,200	—	—	15	2,348,200	91.4	%
Total commercial properties		47		15,547,040	22	12,028,357	69	27,575,397	93.1	%
Residential:
Manhattan	Residential	2	(2)	445,105	10	2,156,751	12	2,601,856	91.5	%
Suburban	Residential	—		—	—	—	—	—	—	%
Total residential properties		2		445,105	10	2,156,751	12	2,601,856	91.5	%
Total portfolio		49		15,992,145	32	14,185,108	81	30,177,253	92.9	%

(1) The weighted average occupancy for commercial properties represents the total occupied square feet divided by total square footage at acquisition.  The weighted average occupancy for residential properties represents the total occupied units divided by total available units.

(2) As of December 31, 2018, we owned a building at 315 West 33rd Street, also known as The Olivia, that was comprised of approximately 270,132 square feet (unaudited) of retail space and approximately 222,855 square feet (unaudited) of residential space. For the purpose of this report, we have included this building in the number of retail properties we own. However, we have included only the retail square footage in the retail approximate square footage, and have listed the balance of the square footage as residential square footage.

XML

Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2018

Accounting Policies [Abstract]

Schedule of estimated useful lives

Properties are depreciated using the straight-line method over the estimated useful lives of the assets. The estimated useful lives are as follows:

Category	Term
Building (fee ownership)	40 years
Building improvements	shorter of remaining life of the building or useful life
Building (leasehold interest)	lesser of 40 years or remaining term of the lease
Property under capital lease	remaining lease term
Furniture and fixtures	four to seven years
Tenant improvements	shorter of remaining term of the lease or useful life

Schedule of marketable securities

At December 31, 2018 and 2017, we held the following marketable securities (in thousands):

	December 31,
	2018		2017
Commercial mortgage-backed securities	$	28,638	$	28,579
Total marketable securities available-for-sale	$	28,638	$	28,579

Summary of identified intangible assets (acquired above-market leases and in-place leases) and intangible liabilities (acquired below-market leases)

The following summarizes our identified intangible assets (acquired above-market leases and in-place leases) and intangible liabilities (acquired below-market leases) as of December 31, 2018 and 2017 (in thousands):

	December 31,
	2018			2017
Identified intangible assets (included in other assets):
Gross amount	$	266,540		$	325,880
Accumulated amortization	(241,040		)	(277,038		)
Net(1)	$	25,500		$	48,842
Identified intangible liabilities (included in deferred revenue):
Gross amount	$	276,245		$	540,283
Accumulated amortization	(253,767		)	(402,583		)
Net(1)	$	22,478		$	137,700

(1) As of December 31, 2018, no net intangible assets and no net intangible liabilities were reclassified to assets held for sale and liabilities related to assets held for sale. As of December 31, 2017, $13.9 million net intangible assets and $4.1 million net intangible liabilities were reclassified to assets held for sale and liabilities related to assets held for sale.

Schedule of estimated annual amortization of acquired above-market leases, net of acquired below-market leases

The estimated annual amortization of acquired above-market leases, net of acquired (below-market) leases (a component of rental revenue), for each of the five succeeding years is as follows (in thousands):

2019	$	(5,227	)
2020	(3,655		)
2021	(1,631		)
2022	(1,328		)
2023	(749		)

Schedule of estimated annual amortization of all other identifiable assets

The estimated annual amortization of all other identifiable assets (a component of depreciation and amortization expense) including tenant improvements for each of the five succeeding years is as follows (in thousands):

2019	$	9,825
2020	4,817
2021	3,454
2022	1,892
2023	1,507

Schedules of concentration of risk, by risk factor

For the years ended December 31, 2018, 2017, and 2016, the following properties contributed more than 5.0% of our annualized cash rent, including our share of joint venture annualized cash rent:

Property	2018	Property	2017	Property	2016
11 Madison Avenue	7.4%	11 Madison Avenue	7.1%	1515 Broadway	8.8%
1185 Avenue of the Americas	6.7%	1185 Avenue of the Americas	7.1%	1185 Avenue of the Americas	6.9%
420 Lexington Avenue	6.5%	1515 Broadway	7.0%	11 Madison Avenue	6.1%
1515 Broadway	6.0%	420 Lexington Avenue	6.0%	420 Lexington Avenue	5.9%
One Madison Avenue	5.8%	One Madison Avenue	5.6%	One Madison Avenue	5.6%

XML

Property Acquisitions (Tables)

12 Months Ended

Dec. 31, 2018

Business Combinations [Abstract]

Schedule of Fair Value of Equity Interest Immediately Before Acquisition Date

During the year ended December 31, 2018, the properties listed below were acquired from third parties.

Property	Acquisition Date	Property Type	Approximate Square Feet		Acquisition Price (in millions)
2 Herald Square(1)	May 2018	Leasehold Interest	369,000		$	266.0
1231 Third Avenue(2)(3)	July 2018	Fee Interest	39,000		55.4
Upper East Side Residential(3)(4)	August 2018	Fee Interest	0.2	acres	30.2
133 Greene Street(2)	October 2018	Fee Interest	6,425		31.0
712 Madison Avenue(2)	December 2018	Fee Interest	6,600		58.0

(1) In May 2018, the Company was the successful bidder for the leasehold interest in 2 Herald Square, at the foreclosure of the asset. In April and May 2017, the Company had purchased, at par, loans in maturity default that were secured by the leasehold interest in 2 Herald Square. At the time the loans were purchased, the Company expected to collect all contractually required payments, including interest. In August 2017, the Company determined that it was probable that the loans would not be repaid in full and therefore, the loans were put on non-accrual status. No impairment was recorded as the Company believed that the fair value of the leasehold exceeded the carrying amount of the loans. In May 2018, the Company was the successful bidder at the foreclosure of the asset. We recorded the assets acquired and liabilities assumed at fair value. This resulted in the recognition of a fair value adjustment of $8.1 million, which is reflected in the Company's consolidated statement of operations within purchase price and other fair value adjustments. See Note 16, "Fair Value Measurements." The Company subsequently sold a 49% interest in the property in November 2018. See Note 4, "Properties Held for Sale and Dispositions." and Note 6, "Investments in Unconsolidated Joint Ventures."

(2) The Company accepted an assignment of the equity interests in the property in lieu of repayment of the Company's debt investment, and recorded the assets received and liabilities assumed at fair value.

(3) This property was subsequently sold in October 2018. See Note 4, "Properties Held for Sale and Dispositions."

(4) In August 2018, the Company acquired the fee interest in three additional land parcels at the Upper East Side Residential Assemblage.

Schedule of Recognized Identified Assets Acquired and Liabilities Assumed

The following summarizes our final allocation of the purchase price of the assets acquired and liabilities assumed upon the closing of this acquisition (in thousands):

	183 Broadway
Acquisition Date	March 2016
Ownership Type	Fee Interest
Property Type	Retail/Residential
Purchase Price Allocation:
Land	$	5,799
Building and building leasehold	23,431
Above-market lease value	—
Acquired in-place leases	773
Other assets, net of other liabilities	20
Assets acquired	30,023
Mark-to-market assumed debt	—
Below-market lease value	(1,523		)
Derivatives	—
Liabilities assumed	(1,523		)
Purchase price	$	28,500
Net consideration funded by us at closing, excluding consideration financed by debt	$	28,500
Equity and/or debt investment held	$	—
Debt assumed	$	—

XML

Properties Held for Sale and Property Dispositions (Tables)

12 Months Ended

Dec. 31, 2018

Discontinued Operations and Disposal Groups [Abstract]

Summary of properties sold and income from discontinued operations

The following table summarizes the properties sold during the years ended December 31, 2018, 2017, and 2016:

Property	Disposition Date	Property Type	Unaudited Approximate Usable Square Feet	Sales Price(1) (in millions)		Gain (Loss) on Sale(2) (in millions)
2 Herald Square(3)	November 2018	Office/Retail	369,000	$	265.0	$	—
400 Summit Lake Drive	November 2018	Land	39.5 acres	3.0		(36.2		)
Upper East Side Assemblage(4)(5)	October 2018	Development	70,142	143.8		(6.3		)
1-6 International Drive	July 2018	Office	540,000	55.0		(2.6		)
635 Madison Avenue	June 2018	Retail	176,530	153.0		(14.1		)
115-117 Stevens Avenue	May 2018	Office	178,000	12.0		(0.7		)
600 Lexington Avenue	January 2018	Office	303,515	305.0		23.8
1515 Broadway (6)	December 2017	Office	1,750,000	1,950.0		—
125 Chubb Way	October 2017	Office	278,000	29.5		(26.1		)
16 Court Street	October 2017	Office	317,600	171.0		64.9
680-750 Washington Boulevard	July 2017	Office	325,000	97.0		(44.2		)
520 White Plains Road	April 2017	Office	180,000	21.0		(14.6		)
102 Greene Street (7)	April 2017	Retail	9,200	43.5		4.9
400 East 57th Street	October 2016	Residential	290,482	83.3		23.9
11 Madison Avenue (8)	August 2016	Office	2,314,000	2,605.0		3.6
500 West Putnam	July 2016	Office	121,500	41.0		(10.4		)
388 Greenwich	June 2016	Office	2,635,000	2,002.3		206.5
7 International Drive	May 2016	Land	31 Acres	20.0		(6.9		)
248-252 Bedford Avenue	February 2016	Residential	66,611	55.0		15.3
885 Third Avenue (9)	February 2016	Leased Fee Interest	607,000	453.0		(8.8		)

(1) Sales price represents the actual sales price for an entire property or the gross asset valuation for interests in a property.

(2) The gain on sale for 600 Lexington, 16 Court Street, 102 Greene Street, 400 East 57th Street, 11 Madison Avenue, 388 Greenwich, and 248-252 Bedford Avenue are net of $1.3 million, $2.5 million, $0.9 million, $1.0 million, $0.6 million, $1.6 million, and $1.3 million in employee compensation accrued in connection with the realization of these investment gains. Additionally, amounts do not include adjustments for expenses recorded in subsequent periods.

(3) In November 2018, the company sold a 49% interest in 2 Herald Square to an Israeli institutional investor. See Note 6, "Investments in Unconsolidated Joint Ventures."

(4) Upper East Side Assemblage consists of 260 East 72nd Street, 31,076 square feet of development rights, 252-254 East 72nd Street, 257 East 71st Street, 259 East 71st Street, and 1231 Third Avenue.

(5) The Company recorded a $5.8 million charge in 2018 that is included in depreciable real estate reserves and impairment in the consolidated statement of operations.

(6) In November 2017, the Company sold a 30.13% interest in 1515 Broadway to affiliates of Allianz Real Estate. At that time, the sale did not meet the criteria for sale accounting and as a result the property was accounted for under the profit sharing method. The Company achieved sale accounting upon adoption of ASC 610-20 in January 2018 and closed on the sale of an additional 12.87% interest in the property to Allianz in February 2018. See Note 6, "Investments in Unconsolidated Joint Ventures."

(7) In April 2017, we closed on the sale of a 90% interest 102 Greene Street and had subsequently accounted for our interest in the property as an investment in unconsolidated joint ventures. We sold the remaining 10% interest in September 2017. See Note 6, "Investments in Unconsolidated Joint Ventures."

(8) In August 2016, we sold a 40% interest in 11 Madison Avenue. At that time, the sale did not meet the criteria for sale accounting and, as a result, the property was accounted for under the profit sharing method. In November 2016, the Company obtained consent to the modifications to the mortgage on the property, which resulted in the Company achieving sale accounting on the transaction. See Note 6, "Investments in Unconsolidated Joint Ventures."

(9) In February 2016, we closed on the sale of 885 Third Avenue. At that time, the sale did not meet the criteria for sale accounting and as a result the property remained on our consolidated financial statements until the criteria was met in April 2017.

XML

Debt and Preferred Equity Investments (Tables)

12 Months Ended

Dec. 31, 2018

Investments, Debt and Equity Securities [Abstract]

Schedule of debt and preferred equity book balance roll forward

Below is a summary of the activity relating to our debt and preferred equity investments as of December 31, 2018 and 2017 (in thousands):

	December 31, 2018			December 31, 2017
Balance at beginning of period (1)	$	2,114,041		$	1,640,412
Debt investment originations/accretion (2)	834,304			1,142,591
Preferred equity investment originations/accretion (2)	151,704			144,456
Redemptions/sales/syndications/amortization (3)	(994,906		)	(813,418		)
Net change in loan loss reserves	(5,750		)	—
Balance at end of period (1)	$	2,099,393		$	2,114,041

(1) Net of unamortized fees, discounts, and premiums.

(2) Accretion includes amortization of fees and discounts and paid-in-kind investment income.

(3) Certain participations in debt investments that were sold or syndicated did not meet the conditions for sale accounting and are included in other assets and other liabilities on the consolidated balance sheets.

Summary of debt investments

As of December 31, 2018 and 2017, we held the following debt investments with an aggregate weighted average current yield of 8.99%, at December 31, 2018 (in thousands):

Loan Type	December 31, 2018 Future Funding Obligations		December 31, 2018 Senior Financing		December 31, 2018 Carrying Value (1)		December 31, 2017 Carrying Value (1)		Maturity Date (2)
Fixed Rate Investments:
Mezzanine Loan(3a)	$	—	$	1,160,000	$	213,185	$	204,005	March 2020
Mezzanine Loan	—		15,000		3,500		3,500		September 2021
Mezzanine Loan	—		147,000		24,932		24,913		April 2022
Mezzanine Loan	—		280,000		36,585		34,600		August 2022
Mezzanine Loan	—		85,097		12,706		12,699		November 2023
Mezzanine Loan	—		180,000		30,000		—		December 2023
Mezzanine Loan(3b)	—		115,000		12,941		12,932		June 2024
Mezzanine Loan	—		95,000		30,000		30,000		January 2025
Mezzanine Loan	—		340,000		11,000		15,000		November 2026
Mezzanine Loan	—		1,712,750		55,250		55,250		June 2027
Mortgage/Jr. Mortgage Loan(4)	—		—		—		250,464
Mortgage Loan(5)	—		—		—		26,366
Mortgage Loan(5)	—		—		—		239
Total fixed rate	$	—	$	4,129,847	$	430,099	$	669,968
Floating Rate Investments:
Mezzanine Loan(6)	$	—	$	45,025	$	37,499	$	34,879	January 2019
Mezzanine Loan(3c)(7)	—		85,000		15,333		15,381		March 2019
Mezzanine Loan(3d)(7)	—		65,000		14,822		14,869		March 2019
Mezzanine Loan(8)	—		38,000		21,990		21,939		March 2019
Mezzanine Loan(7)	—		40,000		19,986		19,982		April 2019
Mezzanine Loan	—		265,000		24,961		24,830		April 2019
Mortgage/Jr. Mortgage Participation Loan	40,530		233,086		84,012		71,832		August 2019
Mezzanine Loan(7)(8)	—		65,000		14,998		14,955		August 2019
Mortgage/Mezzanine Loan(7)	—		—		19,999		19,940		August 2019
Mortgage/Mezzanine Loan	1,027		—		154,070		143,919		September 2019
Mezzanine Loan	—		350,000		34,886		34,737		October 2019
Mortgage/Mezzanine Loan(9)	7,243		—		62,493		43,845		January 2020
Mezzanine Loan(9)	559		575,955		79,164		75,834		January 2020
Mortgage Loan	11,204		—		88,501		—		February 2020
Mezzanine Loan	1,277		322,300		53,402		—		March 2020
Mortgage/Mezzanine Loan	14,860		—		277,694		—		April 2020
Mortgage/Mezzanine Loan(7)	—		—		37,094		—		June 2020
Mezzanine Loan	7,887		38,167		12,627		11,259		July 2020
Mortgage/Mezzanine Loan	—		—		83,449		—		October 2020
Mezzanine Loan	38,575		362,908		88,817		75,428		November 2020
Mortgage/Mezzanine Loan	33,131		—		98,804		88,989		December 2020
Mortgage/Mezzanine Loan	—		—		35,266		35,152		December 2020
Jr. Mortgage Participation/Mezzanine Loan	—		60,000		15,665		15,635		July 2021
Mezzanine Loan(8)	—		38,596		7,305		34,947		December 2021
Mortgage/Mezzanine Loan (5)	—		—		—		162,553
Mortgage/Mezzanine Loan (5)	—		—		—		74,755
Mortgage/Mezzanine Loan (10)	—		—		—		23,609

Loan Type	December 31, 2018 Future Funding Obligations		December 31, 2018 Senior Financing		December 31, 2018 Carrying Value (1)		December 31, 2017 Carrying Value (1)		Maturity Date (2)
Mortgage/Mezzanine Loan(5)	—		—		—		16,969
Mezzanine Loan(5)	—		—		—		59,723
Mezzanine Loan(5)	—		—		—		37,851
Mezzanine Loan(5)	—		—		—		14,855
Mezzanine Loan(11)	—		—		—		12,174
Mezzanine Loan(11)	—		—		—		10,934
Mezzanine Loan(5)	—		—		—		37,250
Mezzanine Loan(5)	—		—		—		15,148
Mezzanine Loan(5)	—		—		—		8,550
Mezzanine Loan(11)	—		—		—		26,927
Total floating rate	$	156,293	$	2,584,037	$	1,382,837	$	1,299,650
Total	$	156,293	$	6,713,884	$	1,812,936	$	1,969,618

(1) Carrying value is net of discounts, premiums, original issue discounts and deferred origination fees.

(2) Represents contractual maturity, excluding any unexercised extension options.

(3) Carrying value is net of the following amounts that were sold or syndicated, which are included in other assets and other liabilities on the consolidated balance sheets as a result of the transfers not meeting the conditions for sale accounting: (a) $1.3 million, (b) $12.0 million, (c) $14.6 million, and (d) $14.1 million.

(4) These loans were purchased at par in April and May 2017 and were in maturity default at the time of acquisition. At the time the loans were purchased, the Company expected to collect all contractually required payments, including interest. In August 2017, the Company determined that it was probable that the loans would not be repaid in full and therefore, the loans were put on non-accrual status. No impairment was recorded as the Company believed that the fair value of the property exceeded the carrying amount of the loans. In May 2018, the Company was the successful bidder at the foreclosure of the asset, at which time the loans were credited to our equity investment in the property.

(5) This loan was repaid in 2018.

(6) As of January 2019, this loan is in maturity default. No impairment was recorded as the Company believes that the fair value of the property exceeded the carrying amount of the loans.

(7) This loan was extended in 2018.

(8) This loan was repaid in 2019.

(9) This loan was modified in 2019.

(10) This loan was sold in 2018.

(11) In 2018, the Company accepted an assignment of the equity interests in the property in lieu of repayment of the loan, and recorded the assets received and liabilities assumed at fair value.

Summary of preferred equity investments

As of December 31, 2018 and 2017, we held the following preferred equity investments with an aggregate weighted average current yield of 9.12% at December 31, 2018 (in thousands):

Type	December 31, 2018 Future Funding Obligations		December 31, 2018 Senior Financing		December 31, 2018 Carrying Value (1)		December 31, 2017 Carrying Value (1)		Mandatory Redemption (2)
Preferred Equity(3)	$	—	$	272,000	$	143,183	$	144,423	April 2021
Preferred Equity	—		1,768,000		143,274		—		June 2022
	$	—	$	2,040,000	$	286,457	$	144,423

(1) Carrying value is net of deferred origination fees.

(2) Represents contractual maturity, excluding any unexercised extension options.

(3) In February 2016, we closed on the sale of 885 Third Avenue and retained a preferred equity position in the property. The sale did not meet the criteria for sale accounting under the full accrual method in ASC 360-20, Property, Plant and Equipment - Real Estate Sales. As a result the property remained on our consolidated balance sheet until the criteria was met in April 2017 at which time the property was deconsolidated and the preferred equity investment was recognized.

Rollforward of total allowance for loan loss reserves

The following table is a rollforward of our total loan loss reserves at December 31, 2018, 2017 and 2016 (in thousands):

	December 31,
	2018			2017		2016
Balance at beginning of year	$	—		$	—	$	—
Expensed	6,839			—		—
Recoveries	—			—		—
Charge-offs and reclassifications	(1,089		)	—		—
Balance at end of period	$	5,750		$	—	$	—

XML

Investments in Unconsolidated Joint Ventures (Tables)

12 Months Ended

Dec. 31, 2018

Schedule of Equity Method Investments [Line Items]

Equity Method Investments

The table below provides general information on each of our joint ventures as of December 31, 2018:

Property	Partner	Ownership Interest (1)	Economic Interest (1)	Unaudited Approximate Square Feet	Acquisition Date (2)	Acquisition Price(2) (in thousands)
100 Park Avenue	Prudential Real Estate Investors	49.90%	49.90%	834,000	February 2000	$	95,800
717 Fifth Avenue	Jeff Sutton/Private Investor	10.92%	10.92%	119,500	September 2006	251,900
800 Third Avenue	Private Investors	60.52%	60.52%	526,000	December 2006	285,000
919 Third Avenue(3)	New York State Teacher's Retirement System	51.00%	51.00%	1,454,000	January 2007	1,256,727
11 West 34th Street	Private Investor/ Jeff Sutton	30.00%	30.00%	17,150	December 2010	10,800
280 Park Avenue	Vornado Realty Trust	50.00%	50.00%	1,219,158	March 2011	400,000
1552-1560 Broadway(4)	Jeff Sutton	50.00%	50.00%	57,718	August 2011	136,550
10 East 53rd Street	Canadian Pension Plan Investment Board	55.00%	55.00%	354,300	February 2012	252,500
521 Fifth Avenue	Plaza Global Real Estate Partners LP	50.50%	50.50%	460,000	November 2012	315,000
21 East 66th Street(5)	Private Investors	32.28%	32.28%	13,069	December 2012	75,000
650 Fifth Avenue(6)	Jeff Sutton	50.00%	50.00%	69,214	November 2013	—
121 Greene Street	Jeff Sutton	50.00%	50.00%	7,131	September 2014	27,400
55 West 46th Street	Prudential Real Estate Investors	25.00%	25.00%	347,000	November 2014	295,000
Stonehenge Portfolio(7)	Various	Various	Various	1,439,016	February 2015	36,668
131-137 Spring Street(8)	Invesco Real Estate	20.00%	20.00%	68,342	August 2015	277,750
605 West 42nd Street	The Moinian Group	20.00%	20.00%	927,358	April 2016	759,000
11 Madison Avenue	PGIM Real Estate	60.00%	60.00%	2,314,000	August 2016	2,605,000
333 East 22nd Street	Private Investors	33.33%	33.33%	26,926	August 2016	—
400 East 57th Street(9)	BlackRock, Inc and Stonehenge Partners	51.00%	41.00%	290,482	October 2016	170,000
One Vanderbilt(10)	National Pension Service of Korea/Hines Interest LP	71.01%	71.01%	—	January 2017	3,310,000
Worldwide Plaza	RXR Realty / New York REIT / Private Investor	24.35%	24.35%	2,048,725	October 2017	1,725,000
1515 Broadway(11)	Allianz Real Estate of America	56.87%	56.87%	1,750,000	November 2017	1,950,000
2 Herald Square	Israeli Institutional Investor	51.00%	51.00%	369,000	November 2018	266,000

(1) Ownership interest and economic interest represent the Company's interests in the joint venture as of December 31, 2018. Changes in ownership or economic interests within the current year are disclosed in the notes below.

(2) Acquisition date and price represent the date on which the Company initially acquired an interest in the joint venture and the actual or implied gross purchase price for the joint venture on that date. Acquisition date and price are not adjusted for subsequent acquisitions or dispositions of interest.

(3) In January 2018, the partnership agreement for our investment was modified resulting in the Company no longer having a controlling interest in this investment. As a result the investment was deconsolidated as of January 1, 2018. The Company recorded its non-controlling interest at fair value resulting in a $49.3 million fair value adjustment in the consolidated statement of operations. This fair value was allocated to the assets and liabilities, including identified intangibles of the property.

(4) The purchase price represents only the purchase of the 1552 Broadway interest which comprised approximately 13,045 square feet. The joint venture also owns a long-term leasehold interest in the retail space and certain other spaces at 1560 Broadway, which is adjacent to 1552 Broadway.

(5) We hold a 32.28% interest in three retail and two residential units at the property and a 16.14% interest in three residential units at the property.

(6) The joint venture owns a long-term leasehold interest in the retail space at 650 Fifth Avenue. In connection with the ground lease obligation, SLG provided a performance guaranty and our joint venture partner executed a contribution agreement to reflect its pro rata obligation. In the event the property is converted into a condominium unit and the landlord elects the purchase option, the joint venture shall be obligated to acquire the unit at the then fair value.

(7) In February and March 2018, the Company, together with its joint venture partner, closed on the sale of two properties from the Stonehenge Portfolio. These sales are further described under Sale of Joint Venture Interest of Properties below.

(8) In January 2019, we closed on the sale of our interest in this property to our joint venture partner. The transaction generated net cash proceeds to the Company of $15.2 million.

(9) In October 2016, the Company sold a 49% interest in this property to an investment account managed by BlackRock, Inc. The Company's interest in the property was sold within a consolidated joint venture owned 90% by the Company and 10% by Stonehenge. The transaction resulted in the deconsolidation of the venture's remaining 51% interest in the property. The Company's joint venture with Stonehenge remains consolidated resulting in the combined 51% interest being shown within investments in unconsolidated joint ventures on the Company's balance sheet.

(10) The partners have committed aggregate equity to the project totaling no less than $525 million and their ownership interest in the joint venture is based on their capital contributions, up to an aggregate maximum of 29.0%. At December 31, 2018 the total of the two partners' ownership interests based on equity contributed was 23.4%.

(11) In November 2017, the Company sold a 30% interest in 1515 Broadway to affiliates of Allianz Real Estate. The sale did not meet the criteria for sale accounting and as a result the property was accounted for under the profit sharing method at December 31, 2017. The Company achieved sale accounting upon adoption of ASC 610-20 in January 2018 and recorded a $0.6 billion gain from the sale of the partial interest and related step-up in basis to fair value of the retained non-controlling interest as an adjustment to beginning retained earnings based on the application of the modified retrospective adoption approach. The Company closed on the sale of an additional 13% interest in the property to Allianz in February 2018.

As of December 31, 2018 and 2017, the carrying value for acquisition, development and construction arrangements were as follows (in thousands):

Loan Type	December 31, 2018		December 31, 2017		Maturity Date
Mezzanine Loan(1)	$	44,357	44,823		February 2022
Mezzanine Loan and Preferred Equity (2)	—		100,000
Mezzanine Loan(3)	—		26,716
	$	44,357	$	171,539

(1) We have an option to convert our loan to an equity interest subject to certain conditions. We have determined that our option to convert the loan to equity is not a derivative financial instrument pursuant to GAAP.

(2) The mezzanine loan was repaid and the preferred equity interest was redeemed in March 2018.

(3) The Company was redeemed on this investment in July 2018.

Schedule of Mortgage and Other Loans Payable on Joint Venture Properties

The first mortgage notes and other loans payable collateralized by the respective joint venture properties and assignment of leases at December 31, 2018 and 2017, respectively, are as follows (amounts in thousands):

Property	Economic Interest (1)		Maturity Date	Interest Rate (2)		December 31, 2018			December 31, 2017
Fixed Rate Debt:
521 Fifth Avenue	50.50	%	November 2019		3.73%	$	170,000		$	170,000
717 Fifth Avenue (3)	10.92	%	July 2022		4.45%	300,000			300,000
717 Fifth Avenue (3)	10.92	%	July 2022		5.50%	355,328			355,328
650 Fifth Avenue (4)	50.00	%	October 2022		4.46%	210,000			210,000
650 Fifth Avenue (4)	50.00	%	October 2022		5.45%	65,000			65,000
21 East 66th Street	32.28	%	April 2023		3.60%	12,000			12,000
919 Third Avenue	51.00	%	June 2023		5.12%	500,000			—
1515 Broadway	56.87	%	March 2025		3.93%	855,876			872,528
11 Madison Avenue	60.00	%	September 2025		3.84%	1,400,000			1,400,000
800 Third Avenue	60.52	%	February 2026		3.37%	177,000			177,000
400 East 57th Street	41.00	%	November 2026		3.00%	99,828			100,000
Worldwide Plaza	24.35	%	November 2027		3.98%	1,200,000			1,200,000
Stonehenge Portfolio (5)	Various		Various		4.20%	321,076			357,282
3 Columbus Circle (6)						—			350,000
Total fixed rate debt						$	5,666,108		$	5,569,138
Floating Rate Debt:
280 Park Avenue	50.00	%	September 2019	L+	1.73%	$	1,200,000		$	1,200,000
121 Greene Street	50.00	%	November 2019	L+	1.50%	15,000			15,000
10 East 53rd Street	55.00	%	February 2020	L+	2.25%	170,000			170,000
131-137 Spring Street (7)	20.00	%	August 2020	L+	1.55%	141,000			141,000
1552 Broadway	50.00	%	October 2020	L+	2.65%	195,000			195,000
55 West 46th Street (8)	25.00	%	November 2020	L+	2.13%	185,569			171,444
11 West 34th Street	30.00	%	January 2021	L+	1.45%	23,000			23,000
103 East 86th Street (9)	1.00	%	January 2021	L+	1.40%	38,000			55,340
100 Park Avenue	49.90	%	February 2021	L+	1.75%	360,000			360,000
One Vanderbilt (10)	71.01	%	September 2021	L+	2.75%	375,000			355,535
2 Herald Square (11)	51.00	%	November 2021	L+	1.55%	133,565			—
605 West 42nd Street	20.00	%	August 2027	L+	1.44%	550,000			550,000
21 East 66th Street	32.28	%	June 2033	1 Year Treasury+	2.75%	1,571			1,648
175-225 Third Street Brooklyn, New York (12)						—			40,000
1745 Broadway (12)						—			345,000
Jericho Plaza (13)						—			81,099
724 Fifth Avenue (14)						—			275,000
Total floating rate debt						$	3,387,705		$	3,979,066
Total joint venture mortgages and other loans payable						$	9,053,813		$	9,548,204
Deferred financing costs, net						(103,191		)	(136,103		)
Total joint venture mortgages and other loans payable, net						$	8,950,622		$	9,412,101

(1) Economic interest represents the Company's interests in the joint venture as of December 31, 2018. Changes in ownership or economic interests, if any, within the current year are disclosed in the notes to the investment in unconsolidated joint ventures table above.

(2) Interest rate as of December 31, 2018, taking into account interest rate hedges in effect during the period. Floating rate debt is presented with the stated interest rate spread over 30-day LIBOR, unless otherwise specified.

(3) These loans are comprised of a $300.0 million fixed rate mortgage loan and $355.3 million mezzanine loan. The mezzanine loan is subject to accretion based on the difference between contractual interest rate and contractual pay rate.

(4) These loans are comprised of a $210.0 million fixed rate mortgage loan and $65.0 million fixed rate mezzanine loan.

(5) Amount is comprised of $134.3 million, $54.1 million, and $132.6 million in fixed-rated mortgages that mature in August 2019, June 2024, and April 2028, respectively.

(6) In November 2018, we closed on the sale of our interest in the property to our joint venture partner.

(7) In January 2019, we closed on the sale of our interest in this property to our joint venture partner.

(8) This loan has a committed amount of $195.0 million, of which $9.4 million was unfunded as of December 31, 2018.

(9) In February 2019, along with our joint venture partner, we closed on the sale of the property.

(10) This loan is a $1.75 billion construction facility, with reductions in interest cost based on meeting certain conditions, and has an initial five-year term with twoone-year extension options. Advances under the loan are subject to incurred costs, funded equity, loan to value thresholds, and entering into construction contracts.

(11) This loan has a committed amount of $150.0 million.

(12) In 2018, along with our joint venture partner, we closed on the sale of the property.

(13) In 2018, we closed on the sale of our interest in the property.

(14) In 2018, we closed on the sale of substantially all of our interest in the property to our joint venture partner.

Equity Method Investments, Summarized Financial Information Balance Sheet

The combined balance sheets for the unconsolidated joint ventures, at December 31, 2018 and 2017, are as follows (in thousands):

	December 31, 2018		December 31, 2017
Assets (1)
Commercial real estate property, net	$	14,347,673	$	12,822,133
Cash and restricted cash	381,301		494,909
Tenant and other receivables, related party receivables, and deferred rents receivable, net of allowance	273,141		349,944
Debt and preferred equity investments, net	44,357		202,539
Other assets	2,187,166		1,407,806
Total assets	$	17,233,638	$	15,277,331
Liabilities and equity (1)
Mortgages and other loans payable, net	$	8,950,622	$	9,412,101
Deferred revenue/gain	1,660,838		985,648
Other liabilities	946,313		411,053
Equity	5,675,865		4,468,529
Total liabilities and equity	$	17,233,638	$	15,277,331
Company's investments in unconsolidated joint ventures	$	3,019,020	$	2,362,989

(1) The combined assets, liabilities and equity for the unconsolidated joint ventures reflects the effect of step ups in basis on the retained non-controlling interests in deconsolidated investments as a result of the adoption of ASC 610-20 in January 2018.

Equity Method Investments, Summarized Financial Information Income Statement

(1) The combined assets, liabilities and equity for the unconsolidated joint ventures reflects the effect of step ups in basis on the retained non-controlling interests in deconsolidated investments as a result of the adoption of ASC 610-20 in January 2018.

The combined statements of operations for the unconsolidated joint ventures, from acquisition date through the years ended December 31, 2018, 2017, and 2016 are as follows (in thousands):

	Year Ended December 31,
	2018			2017			2016
Total revenues	$	1,244,804		$	904,230		$	712,689
Operating expenses	219,440			157,610			126,913
Real estate taxes	226,961			142,774			111,673
Ground rent	18,697			16,794			14,924
Interest expense, net of interest income	363,055			250,063			197,741
Amortization of deferred financing costs	21,634			23,026			24,829
Transaction related costs	—			146			5,566
Depreciation and amortization	421,458			279,419			199,011
Total expenses	$	1,271,245		$	869,832		$	680,657
Loss on early extinguishment of debt	—			(7,899		)	(1,606		)
Net (loss) income before gain on sale (1)	$	(26,441	)	$	26,499		$	30,426
Company's equity in net income from unconsolidated joint ventures (1)	$	7,311		$	21,892		$	11,874

(1) The combined statements of operations and the Company's equity in net income for the unconsolidated joint ventures reflects the effect of step ups in basis on the retained non-controlling interests in deconsolidated investments as a result of the adoption of ASC 610-20 in January 2018.

Discontinued Operations, Disposed of by Sale

Schedule of Equity Method Investments [Line Items]

Equity Method Investments

The following table summarizes the investments in unconsolidated joint ventures sold during the years ended December 31, 2018, 2017, and 2016:

Property	Ownership Interest Sold	Disposition Date	Type of Sale	Gross Asset Valuation (in thousands)(1)		Gain (Loss) on Sale (in thousands)(2)
3 Columbus Circle	48.90%	November 2018	Ownership Interest	$	851,000	$	160,368
Mezzanine Loan(3)	33.33%	August 2018	Repayment	15,000		N/A
724 Fifth Avenue	49.90%	July 2018	Ownership Interest	365,000		64,587
Jericho Plaza(4)	11.67%	June 2018	Ownership Interest	117,400		147
1745 Broadway	56.87%	May 2018	Property	633,000		52,038
175-225 Third Street Brooklyn, New York	95.00%	April 2018	Property	115,000		19,483
Stonehenge Village(5)	0.50%	March 2018	Property	287,000		(5,701		)
1515 Broadway(6)	13.00%	February 2018	Ownership Interest	1,950,000		—
1274 Fifth Avenue(5)	9.83%	February 2018	Property	44,100		(362		)
102 Greene Street	10.00%	September 2017	Ownership Interest	43,500		283
76 11th Avenue(7)	33.33%	May 2017	Repayment	138,240		N/A
Stonehenge Portfolio (partial)(6)	Various	March 2017	Ownership Interest	300,000		871
EOP Denver	0.48%	September 2016	Ownership Interest	180,700		300
33 Beekman (8)	45.90%	May 2016	Property	196,000		33,000
EOP Denver	4.79%	March 2016	Ownership Interest	180,700		2,800
7 Renaissance Square	50.00%	March 2016	Property	20,700		4,200
Jericho Plaza (4)	66.11%	February 2016	Ownership Interest	95,200		3,300

(1) Represents implied gross valuation for the joint venture or sales price of the property.

(2) Represents the Company's share of the gain or loss. The gain on sale is net of $11.7 million, $0, and $1.1 million of employee compensation accrued in connection with the realization of these investment gains in the years ended December 31, 2018, 2017, and 2016, respectively. Additionally, gain (loss) amounts do not include adjustments for expenses recorded in subsequent periods.

(3) Our investment in a joint venture that owned a mezzanine loan secured by a commercial property in midtown Manhattan was repaid after the joint venture received repayment of the underlying loan.

(4) We sold our 11.67% interest in June 2018. In the first quarter of 2016, our ownership percentage was reduced from 77.78% to 11.67%, upon completion of a restructuring of the joint venture.

(5) Properties were part of the Stonehenge Portfolio.

(6) Our investment in 1515 Broadway was marked to fair value on January 1, 2018 upon adoption of ASC 610-20.

(7) Our investment in a joint venture that owned two mezzanine notes secured by interests in the entity that owns 76 11th Avenue was repaid after the joint venture received repayment of the underlying loans.

(8) In connection with the sale of the property, we also recognized a promote of $10.8 million.

XML

Deferred Costs (Tables)

12 Months Ended

Dec. 31, 2018

Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]

Schedule of Deferred Costs

Deferred costs at December 31, 2018 and 2017 consisted of the following (in thousands):

	December 31,
	2018			2017
Deferred leasing costs	$	453,833		$	443,341
Less: accumulated amortization	(244,723		)	(217,140		)
Deferred costs, net	$	209,110		$	226,201

XML

Mortgages and Other Loans Payable (Tables)

12 Months Ended

Dec. 31, 2018

Mortgages and Other Loans Payable

Schedule of senior unsecured notes and other related disclosures by scheduled maturity date

The first mortgages and other loans payable collateralized by the respective properties and assignment of leases or debt investments at December 31, 2018 and 2017, respectively, were as follows (amounts in thousands):

Property	Maturity Date	Interest Rate (1)		December 31, 2018			December 31, 2017
Fixed Rate Debt:
762 Madison Avenue	February 2022		5.00%	771			771
100 Church Street	July 2022		4.68%	213,208			217,273
420 Lexington Avenue	October 2024		3.99%	300,000			300,000
400 East 58th Street (2)	November 2026		3.00%	39,931			40,000
Landmark Square	January 2027		4.90%	100,000			100,000
485 Lexington Avenue	February 2027		4.25%	450,000			450,000
1080 Amsterdam (3)	February 2027		3.58%	35,807			36,363
315 West 33rd Street	February 2027		4.17%	250,000			250,000
919 Third Avenue (4)				—			500,000
Unsecured Loan (5)				—			16,000
Series J Preferred Units (6)				—			4,000
One Madison Avenue (7)				—			486,153
Total fixed rate debt				$	1,389,717		$	2,400,560
Floating Rate Debt:
FHLB Facility	May 2019	L+	0.27%	$	13,000		$	—
2017 Master Repurchase Agreement	June 2019	L+	2.34%	300,000			90,809
FHLB Facility	December 2019	L+	0.18%	14,500			—
133 Greene Street	August 2020	L+	2.00%	15,523			—
185 Broadway (8)	November 2021	L+	2.85%	111,869			58,000
712 Madison	December 2021	L+	2.50%	28,000			—
115 Spring Street	September 2023	L+	3.40%	65,550			—
719 Seventh Avenue	September 2023	L+	1.20%	50,000			41,622
220 East 42nd Street (9)				—			275,000
Total floating rate debt				$	598,442		$	465,431
Total fixed rate and floating rate debt				$	1,988,159		$	2,865,991
Mortgages reclassed to liabilities related to assets held for sale				—			—
Total mortgages and other loans payable				$	1,988,159		$	2,865,991
Deferred financing costs, net of amortization				(26,919		)	(28,709		)
Total mortgages and other loans payable, net				$	1,961,240		$	2,837,282

(1) Interest rate as of December 31, 2018, taking into account interest rate hedges in effect during the period. Floating rate debt is presented with the stated interest rate spread over 30-day LIBOR, unless otherwise specified.

(2) The loan carries a fixed interest rate of 300 basis points for the first five years and is prepayable without penalty at the end of year five.

(3) The loan is comprised of a $35.5 million mortgage loan and $0.9 million subordinate loan with a fixed interest rate of 350 basis points and 700 basis points, respectively, for the first five years and is prepayable without penalty at the end of year five.

(4) Our investment in the property was deconsolidated as of January 1, 2018. See Note 6, "Investments in Unconsolidated Joint Ventures".

(5) In May 2018, the loan was repaid in connection with the sale of the property.

(6) In June 2018, the Series J Preferred Units were redeemed in connection with the sale of the property.

(7) In 2018, the Company recognized a $14.9 million loss on extinguishment of debt related to the early repayment of this loan.

(8) This loan is a $225.0 million construction facility, with reductions in interest cost based on meeting certain conditions, and has an initial three-year term with twoone-year extension options.

cured Notes

The following table sets forth our senior unsecured notes and other related disclosures as of December 31, 2018 and 2017, respectively, by scheduled maturity date (amounts in thousands):

Issuance	December 31, 2018 Unpaid Principal Balance		December 31, 2018 Accreted Balance			December 31, 2017 Accreted Balance			Interest Rate (1)			Initial Term (in Years)	Maturity Date
March 16, 2010 (2)	$	250,000	$	250,000		$	250,000			7.75	%	10	March 2020
August 7, 2018 (3) (4)	350,000		350,000			—			L+	0.98	%	3	August 2021
October 5, 2017 (3)	500,000		499,591			499,489				3.25	%	5	October 2022
November 15, 2012 (5)	300,000		304,168			305,163				4.50	%	10	December 2022
December 17, 2015 (2)	100,000		100,000			100,000				4.27	%	10	December 2025
August 5, 2011 (2) (6)	—		—			249,953
	$	1,500,000	$	1,503,759		$	1,404,605
Deferred financing costs, net			(8,545		)	(8,666		)
	$	1,500,000	$	1,495,214		$	1,395,939

(1) Interest rate as of December 31, 2018, taking into account interest rate hedges in effect during the period. Floating rate notes are presented with the stated spread over 3-month LIBOR, unless otherwise specified. Interest on the senior unsecured notes is payable semi-annually with principal and unpaid interest due on the scheduled maturity dates.

(2) Issued by the Company and the Operating Partnership as co-obligors.

(3) Issued by the Operating Partnership with the Company as the guarantor.

(4) Beginning on August 8, 2019 and at any time thereafter, the notes are subject to redemption at the Company's option, in whole but not in part, at a redemption price equal to 100% of the principal amount of the notes, plus unpaid accrued interest thereon to the redemption date.

(5) In October 2017, the Company and the Operating Partnership as co-obligors issued an additional $100.0 million of 4.50% senior unsecured notes due December 2022. The notes were priced at 105.334%.

(6)

XML

Corporate Indebtedness (Tables)

12 Months Ended

Dec. 31, 2018

Debt Disclosure [Abstract]

Schedule of senior unsecured notes and other related disclosures by scheduled maturity date

The first mortgages and other loans payable collateralized by the respective properties and assignment of leases or debt investments at December 31, 2018 and 2017, respectively, were as follows (amounts in thousands):

Property	Maturity Date	Interest Rate (1)		December 31, 2018			December 31, 2017
Fixed Rate Debt:
762 Madison Avenue	February 2022		5.00%	771			771
100 Church Street	July 2022		4.68%	213,208			217,273
420 Lexington Avenue	October 2024		3.99%	300,000			300,000
400 East 58th Street (2)	November 2026		3.00%	39,931			40,000
Landmark Square	January 2027		4.90%	100,000			100,000
485 Lexington Avenue	February 2027		4.25%	450,000			450,000
1080 Amsterdam (3)	February 2027		3.58%	35,807			36,363
315 West 33rd Street	February 2027		4.17%	250,000			250,000
919 Third Avenue (4)				—			500,000
Unsecured Loan (5)				—			16,000
Series J Preferred Units (6)				—			4,000
One Madison Avenue (7)				—			486,153
Total fixed rate debt				$	1,389,717		$	2,400,560
Floating Rate Debt:
FHLB Facility	May 2019	L+	0.27%	$	13,000		$	—
2017 Master Repurchase Agreement	June 2019	L+	2.34%	300,000			90,809
FHLB Facility	December 2019	L+	0.18%	14,500			—
133 Greene Street	August 2020	L+	2.00%	15,523			—
185 Broadway (8)	November 2021	L+	2.85%	111,869			58,000
712 Madison	December 2021	L+	2.50%	28,000			—
115 Spring Street	September 2023	L+	3.40%	65,550			—
719 Seventh Avenue	September 2023	L+	1.20%	50,000			41,622
220 East 42nd Street (9)				—			275,000
Total floating rate debt				$	598,442		$	465,431
Total fixed rate and floating rate debt				$	1,988,159		$	2,865,991
Mortgages reclassed to liabilities related to assets held for sale				—			—
Total mortgages and other loans payable				$	1,988,159		$	2,865,991
Deferred financing costs, net of amortization				(26,919		)	(28,709		)
Total mortgages and other loans payable, net				$	1,961,240		$	2,837,282

(1) Interest rate as of December 31, 2018, taking into account interest rate hedges in effect during the period. Floating rate debt is presented with the stated interest rate spread over 30-day LIBOR, unless otherwise specified.

(2) The loan carries a fixed interest rate of 300 basis points for the first five years and is prepayable without penalty at the end of year five.

(3) The loan is comprised of a $35.5 million mortgage loan and $0.9 million subordinate loan with a fixed interest rate of 350 basis points and 700 basis points, respectively, for the first five years and is prepayable without penalty at the end of year five.

(4) Our investment in the property was deconsolidated as of January 1, 2018. See Note 6, "Investments in Unconsolidated Joint Ventures".

(5) In May 2018, the loan was repaid in connection with the sale of the property.

(6) In June 2018, the Series J Preferred Units were redeemed in connection with the sale of the property.

(7) In 2018, the Company recognized a $14.9 million loss on extinguishment of debt related to the early repayment of this loan.

(8) This loan is a $225.0 million construction facility, with reductions in interest cost based on meeting certain conditions, and has an initial three-year term with twoone-year extension options.

cured Notes

The following table sets forth our senior unsecured notes and other related disclosures as of December 31, 2018 and 2017, respectively, by scheduled maturity date (amounts in thousands):

Issuance	December 31, 2018 Unpaid Principal Balance		December 31, 2018 Accreted Balance			December 31, 2017 Accreted Balance			Interest Rate (1)			Initial Term (in Years)	Maturity Date
March 16, 2010 (2)	$	250,000	$	250,000		$	250,000			7.75	%	10	March 2020
August 7, 2018 (3) (4)	350,000		350,000			—			L+	0.98	%	3	August 2021
October 5, 2017 (3)	500,000		499,591			499,489				3.25	%	5	October 2022
November 15, 2012 (5)	300,000		304,168			305,163				4.50	%	10	December 2022
December 17, 2015 (2)	100,000		100,000			100,000				4.27	%	10	December 2025
August 5, 2011 (2) (6)	—		—			249,953
	$	1,500,000	$	1,503,759		$	1,404,605
Deferred financing costs, net			(8,545		)	(8,666		)
	$	1,500,000	$	1,495,214		$	1,395,939

(1) Interest rate as of December 31, 2018, taking into account interest rate hedges in effect during the period. Floating rate notes are presented with the stated spread over 3-month LIBOR, unless otherwise specified. Interest on the senior unsecured notes is payable semi-annually with principal and unpaid interest due on the scheduled maturity dates.

(2) Issued by the Company and the Operating Partnership as co-obligors.

(3) Issued by the Operating Partnership with the Company as the guarantor.

(4) Beginning on August 8, 2019 and at any time thereafter, the notes are subject to redemption at the Company's option, in whole but not in part, at a redemption price equal to 100% of the principal amount of the notes, plus unpaid accrued interest thereon to the redemption date.

(5) In October 2017, the Company and the Operating Partnership as co-obligors issued an additional $100.0 million of 4.50% senior unsecured notes due December 2022. The notes were priced at 105.334%.

(6)

Schedule of combined aggregate principal maturities

Combined aggregate principal maturities of mortgages and other loans payable, 2017 credit facility, trust preferred securities, senior unsecured notes and our share of joint venture debt as of December 31, 2018, including as-of-right extension options and put options, were as follows (in thousands):

	Scheduled Amortization		Principal		Revolving Credit Facility		Unsecured Term Loans		Trust Preferred Securities		Senior Unsecured Notes		Total		Joint Venture Debt
2019	$	6,241	$	27,500	$	—	$	—	$	—	$	—	$	33,741	$	115,295
2020	11,117		315,523		—		—		—		250,000		576,640		278,791
2021	11,636		139,869		—		—		—		350,000		501,505		518,371
2022	9,429		198,588		—		—		—		800,000		1,008,017		220,810
2023	7,301		115,550		500,000		1,300,000		—		—		1,922,851		277,996
Thereafter	9,290		1,136,115		—		200,000		100,000		100,000		1,545,405		2,430,198
	$	55,014	$	1,933,145	$	500,000	$	1,500,000	$	100,000	$	1,500,000	$	5,588,159	$	3,841,461

Schedule of consolidated interest expense, excluding capitalized interest

Consolidated interest expense, excluding capitalized interest, was comprised of the following (in thousands):

	Year Ended December 31,
	2018			2017			2016
Interest expense before capitalized interest	$	244,788		$	284,649		$	348,062
Interest capitalized	(34,162		)	(26,020		)	(24,067		)
Interest income	(1,957		)	(1,584		)	(2,796		)
Interest expense, net	$	208,669		$	257,045		$	321,199

XML

Related Party Transactions (Tables)

12 Months Ended

Dec. 31, 2018

Related Party Transactions [Abstract]

Schedule of amounts due from/to related parties

Amounts due from joint ventures and related parties at December 31, 2018 and 2017 consisted of the following (in thousands):

	December 31,
	2018		2017
Due from joint ventures	$	18,655	$	15,025
Other	9,378		8,014
Related party receivables	$	28,033	$	23,039

XML

Noncontrolling Interests on the Company's Consolidated Financial Statements (Tables)

12 Months Ended

Dec. 31, 2018

Noncontrolling Interest [Abstract]

Schedule of Noncontrolling Interest

Below is a summary of the activity relating to the noncontrolling interests in the Operating Partnership as of December 31, 2018 and 2017 (in thousands):

	December 31,
	2018			2017
Balance at beginning of period	$	461,954		$	473,882
Distributions	(15,000		)	(14,266		)
Issuance of common units	23,655			25,723
Redemption of common units	(60,718		)	(21,574		)
Net income	12,216			3,995
Accumulated other comprehensive income allocation	(66		)	(94		)
Fair value adjustment	(34,236		)	(5,712		)
Balance at end of period	$	387,805		$	461,954

Schedule of Preferred Unit Activity

Below is a summary of the activity relating to the preferred units in the Operating Partnership as of December 31, 2018 and 2017 (in thousands):

	December 31,
	2018			2017
Balance at beginning of period	$	301,735		$	302,010
Issuance of preferred units	—			—
Redemption of preferred units	(1,308		)	(275		)
Balance at end of period	$	300,427		$	301,735

XML

Stockholders' Equity of the Company (Tables)

12 Months Ended

Dec. 31, 2018

Stockholders' Equity Note [Abstract]

Class of Treasury Stock

At December 31, 2018 repurchases executed under the plan were as follows:

Period	Shares repurchased	Average price paid per share	Cumulative number of shares repurchased as part of the repurchase plan or programs
Year ended 2017	8,342,411	$101.64	8,342,411
First quarter 2018	3,653,928	$97.07	11,996,339
Second quarter 2018	3,479,552	$97.22	15,475,891
Third quarter 2018	252,947	$99.75	15,728,838
Fourth quarter 2018	2,358,484	$93.04	18,087,322

Schedule of Common Stock Issued and Proceeds Received Dividend Reinvestments

The following table summarizes SL Green common stock issued, and proceeds received from dividend reinvestments and/or stock purchases under the DRSPP for the years ended December 31, 2018, 2017, and 2016, respectively (dollars in thousands):

	Year Ended December 31,
	2018		2017		2016
Shares of common stock issued	1,399		2,141		2,687
Dividend reinvestments/stock purchases under the DRSPP	$	136	$	223	$	277

Schedule of Earnings Per Share

SL Green's earnings per share for the years ended December 31, 2018, 2017, and 2016 are computed as follows (in thousands):

	Year Ended December 31,
Numerator	2018			2017			2016
Basic Earnings:
Income attributable to SL Green common stockholders	$	232,312		$	86,424		$	234,946
Less: distributed earnings allocated to participating securities	(552		)	$	(471	)	$	(634	)
Net income attributable to SL Green common stockholders (numerator for basic earnings per share)	$	231,760		$	85,953		$	234,312
Add back: undistributed earnings allocated to participating securities	552			471			634
Add back: Effect of dilutive securities (redemption of units to common shares)	12,216			3,995			10,136
Income attributable to SL Green common stockholders (numerator for diluted earnings per share)	$	244,528		$	90,419		$	245,082

	Year Ended December 31,
Denominator	2018	2017	2016
Basic Shares:
Weighted average common stock outstanding	86,753	98,571	100,185
Effect of Dilutive Securities:
Operating Partnership units redeemable for common shares	4,562	4,556	4,323
Stock-based compensation plans	215	276	373
Diluted weighted average common stock outstanding	91,530	103,403	104,881

The Operating Partnership's earnings per unit for the years ended December 31, 2018, 2017, and 2016 respectively are computed as follows (in thousands):

	Year Ended December 31,
Numerator	2018			2017			2016
Basic Earnings:
Income attributable to SLGOP common unitholders	$	244,528		$	90,419		$	245,082
Less: distributed earnings allocated to participating securities	(552		)	$	(471	)	$	(634	)
Net Income attributable to SLGOP common unitholders (numerator for basic earnings per unit)	$	243,976		$	89,948		$	244,448
Add back: undistributed earnings allocated to participating securities	552			471			634
Income attributable to SLGOP common unitholders	$	244,528		$	90,419		$	245,082

	Year Ended December 31,
Denominator	2018	2017	2016
Basic units:
Weighted average common units outstanding	91,315	103,127	104,508
Effect of Dilutive Securities:
Stock-based compensation plans	215	276	373
Diluted weighted average common units outstanding	91,530	103,403	104,881

XML

Partners' Capital of the Operating Partnership (Tables)

12 Months Ended

Dec. 31, 2018

Equity [Abstract]

Schedule of Earnings Per Share

SL Green's earnings per share for the years ended December 31, 2018, 2017, and 2016 are computed as follows (in thousands):

	Year Ended December 31,
Numerator	2018			2017			2016
Basic Earnings:
Income attributable to SL Green common stockholders	$	232,312		$	86,424		$	234,946
Less: distributed earnings allocated to participating securities	(552		)	$	(471	)	$	(634	)
Net income attributable to SL Green common stockholders (numerator for basic earnings per share)	$	231,760		$	85,953		$	234,312
Add back: undistributed earnings allocated to participating securities	552			471			634
Add back: Effect of dilutive securities (redemption of units to common shares)	12,216			3,995			10,136
Income attributable to SL Green common stockholders (numerator for diluted earnings per share)	$	244,528		$	90,419		$	245,082

	Year Ended December 31,
Denominator	2018	2017	2016
Basic Shares:
Weighted average common stock outstanding	86,753	98,571	100,185
Effect of Dilutive Securities:
Operating Partnership units redeemable for common shares	4,562	4,556	4,323
Stock-based compensation plans	215	276	373
Diluted weighted average common stock outstanding	91,530	103,403	104,881

The Operating Partnership's earnings per unit for the years ended December 31, 2018, 2017, and 2016 respectively are computed as follows (in thousands):

	Year Ended December 31,
Numerator	2018			2017			2016
Basic Earnings:
Income attributable to SLGOP common unitholders	$	244,528		$	90,419		$	245,082
Less: distributed earnings allocated to participating securities	(552		)	$	(471	)	$	(634	)
Net Income attributable to SLGOP common unitholders (numerator for basic earnings per unit)	$	243,976		$	89,948		$	244,448
Add back: undistributed earnings allocated to participating securities	552			471			634
Income attributable to SLGOP common unitholders	$	244,528		$	90,419		$	245,082

	Year Ended December 31,
Denominator	2018	2017	2016
Basic units:
Weighted average common units outstanding	91,315	103,127	104,508
Effect of Dilutive Securities:
Stock-based compensation plans	215	276	373
Diluted weighted average common units outstanding	91,530	103,403	104,881

XML

Share-based Compensation (Tables)

12 Months Ended

Dec. 31, 2018

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of weighted average assumptions used to estimate the grant date fair value of options granted

The fair value of each stock option or LTIP Unit granted is estimated on the date of grant using the Black-Scholes option pricing model based on historical information with the following weighted average assumptions for grants during the years ended December 31, 2018, 2017, and 2016.

	2018		2017		2016
Dividend yield	2.85	%	2.51	%	2.37	%
Expected life	3.5 years		4.4 years		3.7 years
Risk-free interest rate	2.48	%	1.73	%	1.57	%
Expected stock price volatility	22.00	%	28.10	%	26.76	%

Summary of the status of stock options and changes during the period

A summary of the status of the Company's stock options as of December 31, 2018, 2017, and 2016 and changes during the years ended December 31, 2018, 2017, and 2016 are as follows:

	2018					2017					2016
	Options Outstanding			Weighted Average Exercise Price		Options Outstanding			Weighted Average Exercise Price		Options Outstanding			Weighted Average Exercise Price
Balance at beginning of year	$	1,548,719		$	101.48	$	1,737,213		$	98.44	$	1,595,007		$	95.52
Granted	6,000			97.91		174,000			105.66		445,100			105.86
Exercised	(316,302		)	90.22		(292,193		)	81.07		(192,875		)	76.90
Lapsed or canceled	(101,400		)	113.22		(70,301		)	121.68		(110,019		)	123.86
Balance at end of year	$	1,137,017		$	135.54	$	1,548,719		$	101.48	$	1,737,213		$	98.44
Options exercisable at end of year	783,035			$	101.28	800,902			$	94.33	748,617			$	87.72
Weighted average fair value of options granted during the year	$	84,068				$	3,816,652				$	8,363,036

Schedule of other share-based compensation, activity

A summary of the Company's restricted stock as of December 31, 2018, 2017, and 2016 and charges during the years ended December 31, 2018, 2017, and 2016 are as follows:

	2018			2017		2016
Balance at beginning of year	3,298,216			3,202,031		3,137,881
Granted	162,900			96,185		98,800
Canceled	(9,100		)	—		(34,650		)
Balance at end of year	3,452,016			3,298,216		3,202,031
Vested during the year	92,114			95,736		83,822
Compensation expense recorded	$	12,757,704		$	9,809,749	$	7,153,966
Weighted average fair value of restricted stock granted during the year	$	13,440,503		$	9,905,986	$	10,650,077

XML

Accumulated Other Comprehensive Income (Tables)

12 Months Ended

Dec. 31, 2018

Equity [Abstract]

Schedule of Accumulated Other Comprehensive Income

The following tables set forth the changes in accumulated other comprehensive income (loss) by component as of December 31, 2018, 2017 and 2016 (in thousands):

	Net unrealized gain on derivative instruments (1)			SL Green’s share of joint venture net unrealized gain on derivative instruments (2)			Net unrealized gain on marketable securities			Total
Balance at December 31, 2015	$	(10,160	)	$	(592	)	$	2,003		$	(8,749	)
Other comprehensive income before reclassifications	13,534			1,160			3,517			18,211
Amounts reclassified from accumulated other comprehensive income	9,222			3,453			—			12,675
Balance at December 31, 2016	12,596			4,021			5,520			22,137
Other comprehensive (loss) income before reclassifications	(1,618		)	233			(1,348		)	(2,733		)
Amounts reclassified from accumulated other comprehensive income	1,564			766			(3,130		)	(800		)
Balance at December 31, 2017	12,542			5,020			1,042			18,604
Other comprehensive (loss) income before reclassifications	(2,252		)	(103		)	51			(2,304		)
Amounts reclassified from accumulated other comprehensive income	(574		)	(618		)	—			(1,192		)
Balance at December 31, 2018	$	9,716		$	4,299		$	1,093		$	15,108

(1) Amount reclassified from accumulated other comprehensive income (loss) is included in interest expense in the respective consolidated statements of operations. As of December 31, 2018 and 2017, the deferred net losses from these terminated hedges, which is included in accumulated other comprehensive loss relating to net unrealized loss on derivative instrument, was $1.3 million and $3.2 million, respectively.

(2) Amount reclassified from accumulated other comprehensive income (loss) is included in equity in net income from unconsolidated joint ventures in the respective consolidated statements of operations.

XML

Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2018

Fair Value Disclosures [Abstract]

Fair Value Measurements, Recurring and Nonrecurring

The following tables set forth the assets and liabilities that we measure at fair value on a recurring and non-recurring basis by their levels in the fair value hierarchy at December 31, 2018 and 2017 (in thousands):

	December 31, 2018
	Total		Level 1		Level 2		Level 3
Assets:
Marketable securities	$	28,638	$	—	$	28,638	$	—
Interest rate cap and swap agreements (included in other assets)	$	18,676	$	—	$	18,676	$	—
Liabilities:
Interest rate cap and swap agreements (included in other liabilities)	$	7,663	$	—	$	7,663	$	—

	December 31, 2017
	Total		Level 1		Level 2		Level 3
Assets:
Marketable securities	$	28,579	$	—	$	28,579	$	—
Interest rate cap and swap agreements (included in other assets)	$	16,692	$	—	$	16,692	$	—

Fair Value, by Balance Sheet Grouping

The following table provides the carrying value and fair value of these financial instruments as of December 31, 2018 and December 31, 2017 (in thousands):

	December 31, 2018				December 31, 2017
	Carrying Value (1)		Fair Value		Carrying Value (1)		Fair Value
Debt and preferred equity investments	$	2,099,393	(2)		$	2,114,041	(2)
Fixed rate debt	$	3,543,476	$	3,230,127	$	4,305,165	$	4,421,866
Variable rate debt	2,048,442		2,057,966		1,605,431		1,612,224
	$	5,591,918	$	5,288,093	$	5,910,596	$	6,034,090

(1) Amounts exclude net deferred financing costs.

(2) At December 31, 2018, debt and preferred equity investments had an estimated fair value ranging between $2.1 billion and $2.3 billion. At December 31, 2017, debt and preferred equity investments had an estimated fair value ranging between $2.1 billion and $2.3 billion.

XML

Financial Instruments: Derivatives and Hedging (Tables)

12 Months Ended

Dec. 31, 2018

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of notional and fair value of derivative financial instruments and foreign currency hedges

The following table summarizes the notional value at inception and fair value of our consolidated derivative financial instruments at December 31, 2018 based on Level 2 information. The notional value is an indication of the extent of our involvement in these instruments at that time, but does not represent exposure to credit, interest rate or market risks (amounts in thousands).

	Notional Value		Strike Rate		Effective Date	Expiration Date	Balance Sheet Location	Fair Value
Interest Rate Swap	$	200,000	1.131	%	July 2016	July 2023	Other Assets	$	11,148
Interest Rate Swap	100,000		1.161	%	July 2016	July 2023	Other Assets	5,447
Interest Rate Cap	137,500		4.000	%	September 2017	September 2019	Other Assets	—
Interest Rate Swap	100,000		1.928	%	December 2017	November 2020	Other Assets	1,045
Interest Rate Swap	100,000		1.934	%	December 2017	November 2020	Other Assets	1,035
Interest Rate Swap	150,000		2.696	%	January 2019	January 2024	Other Liabilities	(1,858		)
Interest Rate Swap	150,000		2.721	%	January 2019	January 2026	Other Liabilities	(2,450		)
Interest Rate Swap	200,000		2.740	%	January 2019	January 2026	Other Liabilities	(3,354		)
								$	11,013

Schedule of effect of derivative financial instruments on consolidated statements of income

The following table presents the effect of our derivative financial instruments and our share of our joint ventures' derivative financial instruments that are designated and qualify as hedging instruments on the consolidated statements of operations for the years ended December 31, 2018, 2017, and 2016, respectively (in thousands):

	Amount of (Loss) Gain Recognized in Other Comprehensive Loss (Effective Portion)								Location of Loss Reclassified from Accumulated Other Comprehensive Loss into Income	Amount of Loss Reclassified from Accumulated Other Comprehensive Loss into Income (Effective Portion)						Location of (Loss) Gain Recognized in Income on Derivative	Amount of (Loss) Gain  Recognized into Income (Ineffective Portion)
	Year Ended December 31,									Year Ended December 31,							Year Ended December 31,
Derivative	2018			2017			2016			2018		2017		2016			2018			2017		2016
Interest Rate Swaps/Caps	$	(2,284	)	$	(2,282	)	$	14,616	Interest expense	$	609	$	1,821	$	9,521	Interest expense	$	(559	)	$	5	$	(28	)
Share of unconsolidated joint ventures' derivative instruments	(1,788		)	(200		)	2,012		Equity in net income from unconsolidated joint ventures	726		1,035		1,981		Equity in net income from unconsolidated joint ventures	(371		)	55		785
	$	(4,072	)	$	(2,482	)	$	16,628		$	1,335	$	2,856	$	11,502		$	(930	)	$	60	$	757

XML

Rental Income (Tables)

12 Months Ended

Dec. 31, 2018

Leases [Abstract]

Schedule of approximate future minimum rents to be received over the next five years and thereafter

Approximate future minimum rents to be received over the next five years and thereafter for non-cancelable operating leases in effect at December 31, 2018 for the consolidated properties, including consolidated joint venture properties, and our share of unconsolidated joint venture properties are as follows (in thousands):

	Consolidated Properties		Unconsolidated Properties
2019	$	830,336	$	348,060
2020	765,610		375,228
2021	625,956		380,886
2022	562,250		348,222
2023	500,499		333,501
Thereafter	3,272,014		2,098,995
	$	6,556,665	$	3,884,892

XML

Benefit Plans (Tables)

12 Months Ended

Dec. 31, 2018

Retirement Benefits [Abstract]

Schedule of contributions made to multi-employer plans

Contributions we made to the multi-employer plans for the years ended December 31, 2018, 2017 and 2016 are included in the table below (in thousands):

Benefit Plan	2018		2017		2016
Pension Plan	$	3,017	$	3,856	$	3,979
Health Plan	9,310		11,426		11,530
Other plans	1,106		1,463		1,583
Total plan contributions	$	13,433	$	16,745	$	17,092

XML

Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2018

Commitments and Contingencies Disclosure [Abstract]

Schedule of Future Minimum Rental Payments for Operating Leases

The following is a schedule of future minimum lease payments under capital leases and non-cancellable operating leases with initial terms in excess of one year as of December 31, 2018 (in thousands):

	Capital lease			Non-cancellable operating leases (1)
2019	$	2,411		$	31,066
2020	2,620			31,436
2021	2,794			31,628
2022	2,794			29,472
2023	2,794			27,166
Thereafter	817,100			676,090
Total minimum lease payments	$	830,513		$	826,858
Amount representing interest	(786,897		)
Capital lease obligations	$	43,616

(1) As of December 31, 2018, the total minimum sublease rentals to be received in the future under non-cancellable subleases is $1.7 billion.

Schedule of Future Minimum Lease Payments for Capital Leases

The following is a schedule of future minimum lease payments under capital leases and non-cancellable operating leases with initial terms in excess of one year as of December 31, 2018 (in thousands):

	Capital lease			Non-cancellable operating leases (1)
2019	$	2,411		$	31,066
2020	2,620			31,436
2021	2,794			31,628
2022	2,794			29,472
2023	2,794			27,166
Thereafter	817,100			676,090
Total minimum lease payments	$	830,513		$	826,858
Amount representing interest	(786,897		)
Capital lease obligations	$	43,616

XML

Segment Information (Tables)

12 Months Ended

Dec. 31, 2018

Segment Reporting [Abstract]

Schedule of selected results of operations and selected asset information

Selected consolidated results of operations for the years ended December 31, 2018, 2017, and 2016, and selected asset information as of December 31, 2018 and 2017, regarding our operating segments are as follows (in thousands):

	Real Estate Segment			Debt and Preferred Equity Segment		Total Company
Total revenues
Years ended:
December 31, 2018	$	1,025,900		$	201,492	$	1,227,392
December 31, 2017	1,317,602			193,871		1,511,473
December 31, 2016	1,650,973			213,008		1,863,981
Net Income
Years ended:
December 31, 2018	$	129,253		$	141,603	$	270,856
December 31, 2017	(69,294		)	170,363		101,069
December 31, 2016	74,655			204,256		278,911
Total assets
As of:
December 31, 2018	$	10,481,594		$	2,269,764	$	12,751,358
December 31, 2017	11,598,438			2,384,466		13,982,904

XML

Quarterly Financial Data of the Company (unaudited) (Tables)

12 Months Ended

Dec. 31, 2018

Quarterly Financial Information Disclosure [Abstract]

Schedule of Quarterly Financial Information

Summarized quarterly financial data for the years ended December 31, 2018 and 2017 was as follows (in thousands, except for per share amounts):

2018 Quarter Ended	December 31			September 30			June 30			March 31
Total revenues	$	317,036		$	307,545		$	301,116		$	301,695
Total expenses	(267,678		)	(265,553		)	(258,303		)	(258,282		)
Equity in net income from unconsolidated joint ventures	(2,398		)	971			4,702			4,036
Equity in net gain (loss) on sale of interest in unconsolidated joint venture/real estate	167,445			70,937			72,025			(6,440		)
Gain (loss) on sale of real estate, net	(36,984		)	(2,504		)	(14,790		)	23,521
Purchase price and other fair value adjustments	—			(3,057		)	11,149			49,293
Depreciable real estate reserves and impairment	(220,852		)	(6,691		)	—			—
Loss on early extinguishment of debt	(14,889		)	(2,194		)	—			—
Noncontrolling interests and preferred unit distributions	838			(7,507		)	(8,606		)	(8,319		)
Net income attributable to SL Green	(57,482		)	91,947			107,293			105,504
Perpetual preferred stock dividends	(3,737		)	(3,738		)	(3,737		)	(3,738		)
Net (loss) income attributable to SL Green common stockholders	$	(61,219	)	$	88,209		$	103,556		$	101,766
Net (loss) income attributable to common stockholders per common share—basic	$	(0.73	)	$	1.03		$	1.19		$	1.12
Net (loss) income attributable to common stockholders per common share—diluted	$	(0.73	)	$	1.03		$	1.19		$	1.12

2017 Quarter Ended	December 31			September 30			June 30			March 31
Total revenues	$	361,342		$	374,600		$	398,150		$	377,381
Total expenses	(314,108		)	(333,913		)	(365,749		)	(332,675		)
Equity in net income from unconsolidated joint ventures	7,788			4,078			3,412			6,614
Equity in net gain on sale of interest in unconsolidated joint venture/real estate	—			1,030			13,089			2,047
Gain (loss) on sale of real estate, net	76,497			—			(3,823		)	567
Depreciable real estate reserves and impairment	(93,184		)	—			(29,064		)	(56,272		)
Gain on the sale of investment in marketable securities	—			—			—			3,262
Noncontrolling interests and preferred unit distributions	(6,616		)	(3,188		)	(4,056		)	14,165
Net income attributable to SL Green	31,719			42,607			11,959			15,089
Perpetual preferred stock dividends	(3,737		)	(3,738		)	(3,737		)	(3,738		)
Net income attributable to SL Green common stockholders	$	27,982		$	38,869		$	8,222		$	11,351
Net income attributable to common stockholders per common share—basic	$	0.29		$	0.40		$	0.08		$	0.11
Net income attributable to common stockholders per common share—diluted	$	0.29		$	0.40		$	0.08		$	0.11

XML

Quarterly Financial Data of the Operating Partnership (unaudited) (Tables)

12 Months Ended

Dec. 31, 2018

Condensed Income Statements, Captions [Line Items]

Schedule of Quarterly Financial Information

Summarized quarterly financial data for the years ended December 31, 2018 and 2017 was as follows (in thousands, except for per share amounts):

2018 Quarter Ended	December 31			September 30			June 30			March 31
Total revenues	$	317,036		$	307,545		$	301,116		$	301,695
Total expenses	(267,678		)	(265,553		)	(258,303		)	(258,282		)
Equity in net income from unconsolidated joint ventures	(2,398		)	971			4,702			4,036
Equity in net gain (loss) on sale of interest in unconsolidated joint venture/real estate	167,445			70,937			72,025			(6,440		)
Gain (loss) on sale of real estate, net	(36,984		)	(2,504		)	(14,790		)	23,521
Purchase price and other fair value adjustments	—			(3,057		)	11,149			49,293
Depreciable real estate reserves and impairment	(220,852		)	(6,691		)	—			—
Loss on early extinguishment of debt	(14,889		)	(2,194		)	—			—
Noncontrolling interests and preferred unit distributions	838			(7,507		)	(8,606		)	(8,319		)
Net income attributable to SL Green	(57,482		)	91,947			107,293			105,504
Perpetual preferred stock dividends	(3,737		)	(3,738		)	(3,737		)	(3,738		)
Net (loss) income attributable to SL Green common stockholders	$	(61,219	)	$	88,209		$	103,556		$	101,766
Net (loss) income attributable to common stockholders per common share—basic	$	(0.73	)	$	1.03		$	1.19		$	1.12
Net (loss) income attributable to common stockholders per common share—diluted	$	(0.73	)	$	1.03		$	1.19		$	1.12

2017 Quarter Ended	December 31			September 30			June 30			March 31
Total revenues	$	361,342		$	374,600		$	398,150		$	377,381
Total expenses	(314,108		)	(333,913		)	(365,749		)	(332,675		)
Equity in net income from unconsolidated joint ventures	7,788			4,078			3,412			6,614
Equity in net gain on sale of interest in unconsolidated joint venture/real estate	—			1,030			13,089			2,047
Gain (loss) on sale of real estate, net	76,497			—			(3,823		)	567
Depreciable real estate reserves and impairment	(93,184		)	—			(29,064		)	(56,272		)
Gain on the sale of investment in marketable securities	—			—			—			3,262
Noncontrolling interests and preferred unit distributions	(6,616		)	(3,188		)	(4,056		)	14,165
Net income attributable to SL Green	31,719			42,607			11,959			15,089
Perpetual preferred stock dividends	(3,737		)	(3,738		)	(3,737		)	(3,738		)
Net income attributable to SL Green common stockholders	$	27,982		$	38,869		$	8,222		$	11,351
Net income attributable to common stockholders per common share—basic	$	0.29		$	0.40		$	0.08		$	0.11
Net income attributable to common stockholders per common share—diluted	$	0.29		$	0.40		$	0.08		$	0.11

SL Green Operating Partnership

Condensed Income Statements, Captions [Line Items]

Schedule of Quarterly Financial Information

Summarized quarterly financial data for the years ended December 31, 2018 and 2017 was as follows (in thousands, except for per share amounts):

2018 Quarter Ended	December 31			September 30			June 30			March 31
Total revenues	$	317,036		$	307,545		$	301,116		$	301,695
Total expenses	(267,678		)	(265,553		)	(258,303		)	(258,282		)
Equity in net (loss) income from unconsolidated joint ventures	(2,398		)	971			4,702			4,036
Equity in net gain (loss) on sale of interest in unconsolidated joint venture/real estate	167,445			70,937			72,025			(6,440		)
(Loss) gain on sale of real estate, net	(36,984		)	(2,504		)	(14,790		)	23,521
Purchase price and other fair value adjustments	—			(3,057		)	11,149			49,293
Depreciable real estate reserves and impairment	(220,852		)	(6,691		)	—			—
Loss on early extinguishment of debt	(14,889		)	(2,194		)	—			—
Noncontrolling interests and preferred unit distributions	(2,601		)	(2,710		)	(3,020		)	(3,047		)
Net income attributable to SLOP	(60,921		)	96,744			112,879			110,776
Perpetual preferred units distributions	(3,737		)	(3,738		)	(3,737		)	(3,738		)
Net (loss) income attributable to SLGOP common unitholders	$	(64,658	)	$	93,006		$	109,142		$	107,038
Net (loss) income attributable to common unitholders per common share—basic	$	(0.73	)	$	1.03		$	1.19		$	1.12
Net (loss) income attributable to common unitholders per common share—diluted	$	(0.73	)	$	1.03		$	1.19		$	1.12

2017 Quarter Ended	December 31			September 30			June 30			March 31
Total revenues	$	361,342		$	374,600		$	398,150		$	377,381
Total expenses	(314,108		)	(333,913		)	(365,749		)	(332,675		)
Equity in net income from unconsolidated joint ventures	7,788			4,078			3,412			6,614
Equity in net gain on sale of interest in unconsolidated joint venture/real estate	—			1,030			13,089			2,047
Gain (loss) on sale of real estate, net	76,497			—			(3,823		)	567
Depreciable real estate reserves and impairment	(93,184		)	—			(29,064		)	(56,272		)
Gain on the sale of investment in marketable securities	—			—			—			3,262
Noncontrolling interests and preferred unit distributions	(5,328		)	(1,376		)	(3,637		)	14,641
Net income attributable to SLOP	33,007			44,419			12,378			15,565
Perpetual preferred units distributions	(3,737		)	(3,738		)	(3,737		)	(3,738		)
Net income attributable to SLGOP common unitholders	$	29,270		$	40,681		$	8,641		$	11,827
Net income attributable to common unitholders per common share—basic	$	0.29		$	0.40		$	0.08		$	0.11
Net income attributable to common unitholders per common share—diluted	$	0.29		$	0.40		$	0.08		$	0.11

XML

Organization and Basis of Presentation - Additional Information (Details)	12 Months Ended
	Dec. 31, 2018 shares
Organization
Number of shares to be received on redemption of one unit of limited partnership interests (shares)	1
SL Green Operating Partnership | Service Corporation
Organization
Economic interest in variable interest entity (as a percent)	95.00%
SLG Management LLC | SL Green Management
Organization
Percentage of ownership in SL Green Management LLC owned by operating partnership (percent)	100.00%

XML

Organization and Basis of Presentation - Schedule of Commercial Office Properties (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2018 USD ($) ft² building shares	Dec. 31, 2017 USD ($)	Dec. 31, 2015 USD ($)
Real estate properties
Number of Properties | building	81
Approximate Square Feet	30,177,253
Weighted Average Occupancy unaudited (as a percent)	92.90%
Investment in mortgage loans on real estate | $	$ 2,099,393	$ 2,114,041	$ 1,640,412
Number of shares to be received on redemption of one unit of limited partnership interests (shares) | shares	1
Commercial properties
Real estate properties
Number of Properties | building	69
Approximate Square Feet	27,575,397
Weighted Average Occupancy unaudited (as a percent)	93.10%
Residential
Real estate properties
Number of Properties | building	12
Approximate Square Feet	2,601,856
Weighted Average Occupancy unaudited (as a percent)	91.50%
Managed office properties
Real estate properties
Number of Properties | building	2
Approximate Square Feet	2,100,000
Investment in mortgage loans on real estate | $	$ 2,100,000
Debt investments, other | $	$ 100,000
Consolidated properties
Real estate properties
Number of Properties | building	49
Approximate Square Feet	15,992,145
Consolidated properties | Commercial properties
Real estate properties
Number of Properties | building	47
Approximate Square Feet	15,547,040
Consolidated properties | Residential
Real estate properties
Number of Properties | building	2
Approximate Square Feet	445,105
Unconsolidated properties
Real estate properties
Number of Properties | building	32
Approximate Square Feet	14,185,108
Unconsolidated properties | Commercial properties
Real estate properties
Number of Properties | building	22
Approximate Square Feet	12,028,357
Unconsolidated properties | Residential
Real estate properties
Number of Properties | building	10
Approximate Square Feet	2,156,751
Manhattan
Real estate properties
Number of Properties | building	54
Approximate Square Feet	25,227,197
Weighted Average Occupancy unaudited (as a percent)	93.20%
Manhattan | Office
Real estate properties
Number of Properties | building	30
Approximate Square Feet	23,716,274
Weighted Average Occupancy unaudited (as a percent)	94.50%
Manhattan | Retail
Real estate properties
Number of Properties | building	16
Approximate Square Feet	677,822
Weighted Average Occupancy unaudited (as a percent)	96.70%
Manhattan | Development/Redevelopment
Real estate properties
Number of Properties | building	7
Approximate Square Feet	833,101
Weighted Average Occupancy unaudited (as a percent)	54.10%
Manhattan | Fee Interest
Real estate properties
Number of Properties | building	1
Approximate Square Feet	0
Weighted Average Occupancy unaudited (as a percent)	0.00%
Manhattan | Residential
Real estate properties
Number of Properties | building	12
Approximate Square Feet	2,601,856
Weighted Average Occupancy unaudited (as a percent)	91.50%
Manhattan | Consolidated properties
Real estate properties
Number of Properties | building	32
Approximate Square Feet	13,198,840
Manhattan | Consolidated properties | Office
Real estate properties
Number of Properties | building	20
Approximate Square Feet	12,387,091
Manhattan | Consolidated properties | Retail
Real estate properties
Number of Properties | building	7
Approximate Square Feet	325,648
Manhattan | Consolidated properties | Development/Redevelopment
Real estate properties
Number of Properties | building	5
Approximate Square Feet	486,101
Manhattan | Consolidated properties | Fee Interest
Real estate properties
Number of Properties | building	0
Approximate Square Feet	0
Manhattan | Consolidated properties | Residential
Real estate properties
Number of Properties | building	2
Approximate Square Feet	445,105
Manhattan | Consolidated properties | Dual property type, retail portion
Real estate properties
Approximate Square Feet	270,132
Manhattan | Consolidated properties | Dual property type, residential portion
Real estate properties
Approximate Square Feet	222,855
Manhattan | Unconsolidated properties
Real estate properties
Number of Properties | building	22
Approximate Square Feet	12,028,357
Manhattan | Unconsolidated properties | Office
Real estate properties
Number of Properties | building	10
Approximate Square Feet	11,329,183
Manhattan | Unconsolidated properties | Retail
Real estate properties
Number of Properties | building	9
Approximate Square Feet	352,174
Manhattan | Unconsolidated properties | Development/Redevelopment
Real estate properties
Number of Properties | building	2
Approximate Square Feet	347,000
Manhattan | Unconsolidated properties | Fee Interest
Real estate properties
Number of Properties | building	1
Approximate Square Feet	0
Manhattan | Unconsolidated properties | Residential
Real estate properties
Number of Properties | building	10
Approximate Square Feet	2,156,751
Suburban
Real estate properties
Number of Properties | building	15
Approximate Square Feet	2,348,200
Weighted Average Occupancy unaudited (as a percent)	91.40%
Suburban | Office
Real estate properties
Number of Properties | building	13
Approximate Square Feet	2,295,200
Weighted Average Occupancy unaudited (as a percent)	91.30%
Suburban | Retail
Real estate properties
Number of Properties | building	1
Approximate Square Feet	52,000
Weighted Average Occupancy unaudited (as a percent)	100.00%
Suburban | Development/Redevelopment
Real estate properties
Number of Properties | building	1
Approximate Square Feet	1,000
Weighted Average Occupancy unaudited (as a percent)	0.00%
Suburban | Residential
Real estate properties
Number of Properties | building	0
Approximate Square Feet	0
Weighted Average Occupancy unaudited (as a percent)	0.00%
Suburban | Consolidated properties
Real estate properties
Number of Properties | building	15
Approximate Square Feet	2,348,200
Suburban | Consolidated properties | Office
Real estate properties
Number of Properties | building	13
Approximate Square Feet	2,295,200
Suburban | Consolidated properties | Retail
Real estate properties
Number of Properties | building	1
Approximate Square Feet	52,000
Suburban | Consolidated properties | Development/Redevelopment
Real estate properties
Number of Properties | building	1
Approximate Square Feet	1,000
Suburban | Consolidated properties | Residential
Real estate properties
Number of Properties | building	0
Approximate Square Feet	0
Suburban | Unconsolidated properties
Real estate properties
Number of Properties | building	0
Approximate Square Feet	0
Suburban | Unconsolidated properties | Office
Real estate properties
Number of Properties | building	0
Approximate Square Feet	0
Suburban | Unconsolidated properties | Retail
Real estate properties
Number of Properties | building	0
Approximate Square Feet	0
Suburban | Unconsolidated properties | Development/Redevelopment
Real estate properties
Number of Properties | building	0
Approximate Square Feet	0
Suburban | Unconsolidated properties | Residential
Real estate properties
Number of Properties | building	0
Approximate Square Feet	0

XML

Significant Accounting Policies - Additional Information (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Principles of Consolidation
Commercial real estate properties	$ 6,414,798	$ 7,906,006
Mortgages and other loans payable, net	1,961,240	2,837,282
Assets held for sale	0	338,354
Liabilities related to assets held for sale	0	4,074
Consolidated VIEs
Principles of Consolidation
Mortgages and other loans payable, net	$ 140,800	$ 628,900

XML

Significant Accounting Policies - Investments in Commercial Real Estate Properties (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Real Estate [Line Items]
Depreciation expense (including amortization of the capital lease asset)	$ 242,800,000	$ 365,300,000	$ 783,500,000
Period from cessation of major construction to consider construction project as complete and available for occupancy, maximum (in years)	1 year
Weighted average amortization period for above-market leases	1 year 9 months 18 days
Weighted average amortization period for below-market leases (in years)	4 years 7 months 6 days
Weighted average amortization for in-place lease costs	5 years 9 months 18 days
Amortization of above and below Market Leases	$ 6,800,000	20,300,000	196,200,000
Reduction in interest expense from amortization of above-market rate mortgages	0	800,000	2,800,000
Identified intangible assets (included in other assets):
Gross amount	266,540,000	325,880,000
Accumulated amortization	(241,040,000)	(277,038,000)
Net	25,500,000	48,842,000
Identified intangible liabilities (included in deferred revenue):
Gross amount	276,245,000	540,283,000
Accumulated amortization	(253,767,000)	(402,583,000)
Net	22,478,000	137,700,000
Net intangible assets reclassed to assets held for sale	0	13,900,000
Net intangible liabilities reclassed to liabilities relates to assets held for sale	0	$ 4,100,000
Other Identifiable Assets
Estimated annual amortization
2019	9,825,000
2020	4,817,000
2021	3,454,000
2022	1,892,000
2023	1,507,000
Acquired above-market leases, net of acquired below-market leases
Below Market Lease, Net, Amortization Income, Fiscal Year Maturity [Abstract]
2019	(5,227,000)
2020	(3,655,000)
2021	(1,631,000)
2022	(1,328,000)
2023	$ (749,000)
Maximum | Above-market leases
Real Estate [Line Items]
Estimated useful life of other intangible assets (in years)	14 years
Maximum | Below-market leases
Real Estate [Line Items]
Estimated useful life of other intangible assets (in years)	14 years
Maximum | In-place leases
Real Estate [Line Items]
Estimated useful life of other intangible assets (in years)	14 years
Minimum | Above-market leases
Real Estate [Line Items]
Estimated useful life of other intangible assets (in years)	1 year
Minimum | Below-market leases
Real Estate [Line Items]
Estimated useful life of other intangible assets (in years)	1 year
Minimum | In-place leases
Real Estate [Line Items]
Estimated useful life of other intangible assets (in years)	1 year
Building (fee ownership)
Real Estate [Line Items]
Estimated useful life (in years)	40 years
Building (leasehold interest) | Maximum
Real Estate [Line Items]
Estimated useful life (in years)	40 years
Furniture and fixtures | Maximum
Real Estate [Line Items]
Estimated useful life (in years)	7 years
Furniture and fixtures | Minimum
Real Estate [Line Items]
Estimated useful life (in years)	4 years
Building | Maximum
Real Estate [Line Items]
Estimated useful life (in years)	40 years
Building | Minimum
Real Estate [Line Items]
Estimated useful life (in years)	3 years
388-390 Greenwich Street
Real Estate [Line Items]
Amortization of below market leases			$ 172,400,000

XML

Significant Accounting Policies - Investment in Marketable Securities (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Investment in Marketable Securities
Marketable securities	$ 28,638,000	$ 28,579,000
Proceeds from sale of marketable securities	0	55,129,000	$ 6,965,000
Realized gain (loss) on investment in marketable securities		(3,300,000)	$ (100,000)
Fair Value
Investment in Marketable Securities
Marketable securities	28,638,000	28,579,000
Commercial mortgage-backed securities
Investment in Marketable Securities
Marketable securities	28,638,000	28,579,000
Cost basis	27,500,000	27,500,000
Equity marketable securities
Investment in Marketable Securities
Cost basis	$ 0	$ 0

XML

Significant Accounting Policies - Investments in Unconsolidated Joint Ventures/Deferred Lease Costs/Revenue Recognition/Income Taxes (Details)	12 Months Ended
	Dec. 31, 2018 USD ($) joint_venture $ / shares	Dec. 31, 2017 USD ($) $ / shares	Dec. 31, 2016 USD ($) $ / shares
Schedule of Equity Method Investments [Line Items]
Number of joint ventures with performance guarantees under master leases | joint_venture	1
Deferred Lease Costs [Abstract]
Portion of compensation capitalized	$ 15,700,000	$ 16,400,000	$ 15,400,000
Estimated average lease term (in years)	7 years
Days past due for income recognition on debt and preferred equity investments to be suspended	90 days
Loan loss and other investment reserves, net of recoveries	$ 6,839,000	0	0
Income taxes
Federal, state and local tax provision	2,800,000	4,300,000	2,800,000
Interest Expense Increase (Decrease) Assumed Above Market Rate Mortgage Amortization	$ 0	$ (800,000)	$ (2,800,000)
Dividends per share paid (in dollars per share) | $ / shares	$ 3.25	$ 3.10	$ 2.88
Ordinary Income Dividend
Income taxes
Dividends per share paid (in dollars per share) | $ / shares	1.46	1.24	2.48
Capital Gains Dividend
Income taxes
Dividends per share paid (in dollars per share) | $ / shares	$ 1.79	$ 1.86	$ 0.40

XML

Significant Accounting Policies - Concentrations of Credit Risk/Reclassification (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2018 USD ($) Tenant agreement	Dec. 31, 2017 USD ($)	Dec. 31, 2016
Concentration of Credit Risk
Common shares	$ 847	$ 939
Additional paid-in-capital	4,508,685	4,968,338
Treasury shares	(124,049)	(124,049)
Retained earnings	$ 1,278,998	$ 1,139,329
Annualized rent | Customer concentration
Concentration of Credit Risk
Number of tenants (tenants) | Tenant	1
Maximum percentage of annualized rent for any one tenant not individually disclosed (percent) (more than)	5.00%
Annualized rent | 1515 Broadway | Customer concentration
Concentration of Credit Risk
Percentage of concentration	6.00%	7.00%	8.80%
Annualized rent | 1185 Avenue of the Americas | Customer concentration
Concentration of Credit Risk
Percentage of concentration	6.70%	7.10%	6.90%
Annualized rent | 11 Madison Avenue | Customer concentration
Concentration of Credit Risk
Percentage of concentration	7.40%	7.10%	6.10%
Annualized rent | 420 Lexington Avenue | Customer concentration
Concentration of Credit Risk
Percentage of concentration	6.50%	6.00%	5.90%
Annualized rent | One Madison Ave | Customer concentration
Concentration of Credit Risk
Percentage of concentration	5.80%	5.60%	5.60%
Collective bargaining arrangements | Workforce concentration
Concentration of Credit Risk
Percentage of concentration	68.70%
Number of collective bargaining agreements | agreement	6
Collective bargaining arrangements expiring in December 2019 | Workforce concentration
Concentration of Credit Risk
Percentage of concentration	56.00%
Tenant 1 | Annualized rent | Customer concentration
Concentration of Credit Risk
Percentage of concentration	8.20%

XML

Significant Accounting Policies - Accounting Standards Update (Details) - USD ($) $ in Thousands			3 Months Ended
		Jan. 01, 2019	Mar. 31, 2018	Dec. 31, 2018	Dec. 31, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Assets	[1]			$ 12,751,358	$ 13,982,904
Liabilities	[1]			$ 6,115,271	$ 6,629,761
1515 Broadway | Accounting Standards Update 2017-05
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Gain on disposal			$ 600,000
Scenario, Forecast | Accounting Standards Update 2018-11
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Estimated decrease in net income		$ 10,000
Minimum | Scenario, Forecast | Accounting Standards Update 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Assets		400,000
Liabilities		400,000
Maximum | Scenario, Forecast | Accounting Standards Update 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Assets		500,000
Liabilities		$ 500,000

[1] The Company's consolidated balance sheets include assets and liabilities of consolidated variable interest entities ("VIEs"). See Note 2. The consolidated balance sheets include the following amounts related to our consolidated VIEs, excluding the Operating Partnership: $110.0 million and $398.0 million of land, $0.3 billion and $1.4 billion of building and improvements, $2.0 million and $2.0 million of building and leasehold improvements, $47.4 million and $47.4 million of properties under capital lease, $42.2 million and $330.9 million of accumulated depreciation, $721.3 million and $221.0 million of other assets included in other line items, $140.8 million and $628.9 million of real estate debt, net, $0.4 million and $2.5 million of accrued interest payable, $43.6 million and $42.8 million of capital lease obligations, and $18.4 million and $56.8 million of other liabilities included in other line items as of December 31, 2018 and December 31, 2017, respectively.

XML

Property Acquisitions - 2018 Acquisitions (Details) $ in Millions	1 Months Ended
	Dec. 31, 2018 USD ($) ft²	Nov. 30, 2018 ft²	Oct. 31, 2018 USD ($) ft²	Aug. 31, 2018 USD ($) a parcel	Jul. 31, 2018 USD ($) ft²	May 31, 2018 USD ($) ft²
Business Acquisition [Line Items]
Approximate Square Feet | ft²	30,177,253
2 Herald Square
Business Acquisition [Line Items]
Approximate Square Feet | ft²						369,000
Acquisition Price (in millions) | $						$ 266.0
Purchase price fair value adjustment | $						$ 8.1
1231 Third Avenue
Business Acquisition [Line Items]
Approximate Square Feet | ft²					39,000
Acquisition Price (in millions) | $					$ 55.4
Upper East Side Residential
Business Acquisition [Line Items]
Approximate Square Feet | a				0.2
Acquisition Price (in millions) | $				$ 30.2
Number of land parcels, fee interest acquired | parcel				3
113 Greene Street
Business Acquisition [Line Items]
Approximate Square Feet | ft²			6,425
Acquisition Price (in millions) | $			$ 31.0
712 Madison Avenue
Business Acquisition [Line Items]
Approximate Square Feet | ft²	6,600
Acquisition Price (in millions) | $	$ 58.0
2 Herald Square
Business Acquisition [Line Items]
Approximate Square Feet | ft²		369,000
Ownership percentage in disposed asset		49.00%

XML

Property Acquisitions - 2016 Acquisitions (Details) - 183 Broadway - USD ($) $ in Thousands	1 Months Ended
	Mar. 31, 2016	Mar. 31, 2017
Recognized Identifiable Assets Acquired and Liabilities Assumed
Land		$ 5,799
Building and building leasehold		23,431
Above-market lease value		0
Acquired in-place leases		773
Other assets, net of other liabilities		20
Assets acquired		30,023
Mark-to-market assumed debt		0
Below-market lease value		(1,523)
Derivatives		0
Liabilities assumed		(1,523)
Purchase price		$ 28,500
Net consideration funded by us at closing, excluding consideration financed by debt	$ 28,500
Equity and/or debt investment held	0
Debt assumed	$ 0

XML

Properties Held for Sale and Property Dispositions (Details) $ in Thousands	1 Months Ended																	12 Months Ended
	Nov. 30, 2018 USD ($) ft² a	Jun. 30, 2018 USD ($) ft²	May 31, 2018 USD ($) ft²	Feb. 22, 2018	Jan. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Nov. 30, 2017	Oct. 31, 2017 USD ($) ft²	Sep. 30, 2017 USD ($)	Jul. 31, 2017 USD ($) ft²	Apr. 30, 2017 USD ($) ft²	Oct. 31, 2016 USD ($) ft²	Aug. 31, 2016 USD ($) ft²	Jul. 31, 2016 USD ($) ft²	Jun. 30, 2016 USD ($) ft²	May 31, 2016 USD ($) a	Feb. 29, 2016 USD ($) ft²	Dec. 31, 2018 USD ($) ft²	Feb. 28, 2018 USD ($)	Jan. 01, 2018 USD ($) ft²	Dec. 31, 2016 USD ($)
Property Dispositions and Assets Held for Sale
Unaudited Approximate Usable Square Feet | ft²																		30,177,253
Employee-related liabilities						$ 0												$ 11,700			$ 1,100
2 Herald Square
Property Dispositions and Assets Held for Sale
Unaudited Approximate Usable Square Feet | ft²	369,000
Gross asset valuation	$ 265,000
Gain on Sale	$ 0
Ownership percentage in disposed asset	49.00%
400 Summit Lake Drive
Property Dispositions and Assets Held for Sale
Unaudited Approximate Usable Square Feet | a	39.5
Gross asset valuation	$ 3,000
Gain on Sale	$ (36,200)
Upper East Side Assemblage
Property Dispositions and Assets Held for Sale
Unaudited Approximate Usable Square Feet | ft²		70,142
Gross asset valuation		$ 143,800
Gain on Sale		$ (6,300)
Impairment charge																		$ 5,800
1-6 International Drive
Property Dispositions and Assets Held for Sale
Unaudited Approximate Usable Square Feet | ft²		540,000
Gross asset valuation		$ 55,000
Gain on Sale		$ (2,600)
635 Madison Avenue
Property Dispositions and Assets Held for Sale
Unaudited Approximate Usable Square Feet | ft²		176,530
Gross asset valuation		$ 153,000
Gain on Sale		$ (14,100)
115-117 Stevens Avenue
Property Dispositions and Assets Held for Sale
Unaudited Approximate Usable Square Feet | ft²			178,000
Gross asset valuation			$ 12,000
Gain on Sale			$ (700)
600 Lexington Avenue
Property Dispositions and Assets Held for Sale
Unaudited Approximate Usable Square Feet | ft²																				303,515
Gross asset valuation																				$ 305,000
Gain on Sale					$ 23,800
Employee-related liabilities					$ 1,300
1515 Broadway
Property Dispositions and Assets Held for Sale
Unaudited Approximate Usable Square Feet | ft²																		1,750,000
Gross asset valuation																		$ 1,950,000	$ 1,950,000
Gain on Sale						$ 0
Joint venture ownership percentage sold				12.87%			30.13%
125 Chubb Way
Property Dispositions and Assets Held for Sale
Unaudited Approximate Usable Square Feet | ft²								278,000
Gross asset valuation								$ 29,500
Gain on Sale								$ (26,100)
16 Court Street
Property Dispositions and Assets Held for Sale
Unaudited Approximate Usable Square Feet | ft²								317,600
Gross asset valuation								$ 171,000
Gain on Sale								64,900
Employee-related liabilities								$ 2,500
680-750 Washington Boulevard
Property Dispositions and Assets Held for Sale
Unaudited Approximate Usable Square Feet | ft²										325,000
Gross asset valuation										$ 97,000
Gain on Sale										$ (44,200)
520 White Plains Road
Property Dispositions and Assets Held for Sale
Unaudited Approximate Usable Square Feet | ft²											180,000
Gross asset valuation											$ 21,000
Gain on Sale											$ (14,600)
102 Greene Street
Property Dispositions and Assets Held for Sale
Unaudited Approximate Usable Square Feet | ft²											9,200
Gross asset valuation									$ 43,500		$ 43,500
Gain on Sale											4,900
Employee-related liabilities											$ 900
Joint venture ownership percentage sold									10.00%		90.00%
400 East 57th Street
Property Dispositions and Assets Held for Sale
Unaudited Approximate Usable Square Feet | ft²												290,482
Gross asset valuation												$ 83,300
Gain on Sale												23,900
Employee-related liabilities												$ 1,000
Ownership percentage in disposed asset												49.00%
11 Madison Avenue
Property Dispositions and Assets Held for Sale
Unaudited Approximate Usable Square Feet | ft²													2,314,000
Gross asset valuation													$ 2,605,000
Gain on Sale													3,600
Employee-related liabilities													$ 600
Ownership percentage in disposed asset													40.00%
500 West Putnam Avenue
Property Dispositions and Assets Held for Sale
Unaudited Approximate Usable Square Feet | ft²														121,500
Gross asset valuation														$ 41,000
Gain on Sale														$ (10,400)
388 Greenwich
Property Dispositions and Assets Held for Sale
Unaudited Approximate Usable Square Feet | ft²															2,635,000
Gross asset valuation															$ 2,002,300
Gain on Sale															206,500
Employee-related liabilities															$ 1,600
7 International Drive
Property Dispositions and Assets Held for Sale
Unaudited Approximate Usable Square Feet | a																31
Gross asset valuation																$ 20,000
Gain on Sale																$ (6,900)
248-252 Bedford Avenue
Property Dispositions and Assets Held for Sale
Unaudited Approximate Usable Square Feet | ft²																	66,611
Gross asset valuation																	$ 55,000
Gain on Sale																	15,300
Employee-related liabilities																	$ 1,300
885 Third Avenue
Property Dispositions and Assets Held for Sale
Unaudited Approximate Usable Square Feet | ft²																	607,000
Gross asset valuation																	$ 453,000
Gain on Sale																	$ (8,800)

XML

Debt and Preferred Equity Investments - Roll Forward of Net Book Balances (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
SEC Schedule, 12-29, Real Estate Companies, Investment in Movement in Mortgage Loans on Real Estate [Roll Forward]
Balance at beginning of period	$ 2,114,041		$ 1,640,412
Redemptions/sales/syndications/amortization	(994,906)		(813,418)
Net change in loan loss reserves		$ (5,750)	0
Balance at end of period	2,099,393	$ 2,114,041
Debt investment
SEC Schedule, 12-29, Real Estate Companies, Investment in Movement in Mortgage Loans on Real Estate [Roll Forward]
Originations/accretion	834,304		1,142,591
Preferred equity investments
SEC Schedule, 12-29, Real Estate Companies, Investment in Movement in Mortgage Loans on Real Estate [Roll Forward]
Originations/accretion	$ 151,704		$ 144,456

XML

Debt and Preferred Equity Investments - Rollforward of Total Allowance for Loan Loss Reserves (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Loan loss reserve activity
Balance at beginning of year	$ 0	$ 0	$ 0
Expensed	6,839	0	0
Recoveries	0	0	0
Charge-offs and reclassifications	(1,089)	0	0
Balance at end of year	$ 5,750	$ 0	$ 0

XML

Debt and Preferred Equity Investments - Debt Investments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate, interest rate	8.99%
Debt Investments Held [Abstract]
Carrying value	$ 2,099,393	$ 2,114,041
Mezzanine Loan with an Initial Maturity Date of June 2024
Debt Investments Held [Abstract]
Amount participated out	12,000
Mezzanine Loan with an Initial Maturity of March 2019
Debt Investments Held [Abstract]
Amount participated out	14,600
Mezzanine Loan With An Initial Maturity Date Of March 2019, 3
Debt Investments Held [Abstract]
Amount participated out	14,100
Mezzanine Loan with an Initial Maturity Date of March 2020
Debt Investments Held [Abstract]
Amount participated out	1,300
Debt investment
Debt Investments Held [Abstract]
Future Funding Obligations	156,293
Senior Financing	6,713,884
Carrying value	1,812,936	1,969,618
Total fixed rate
Debt Investments Held [Abstract]
Future Funding Obligations	0
Senior Financing	4,129,847
Carrying Value	430,099	669,968
Total fixed rate | Mezzanine Loan With An Initial Maturity Of August 2022
Debt Investments Held [Abstract]
Future Funding Obligations	0
Senior Financing	280,000
Carrying Value	36,585	34,600
Total fixed rate | Mezzanine Loan with an Initial Maturity Date of September 2021
Debt Investments Held [Abstract]
Future Funding Obligations	0
Senior Financing	15,000
Carrying Value	3,500	3,500
Total fixed rate | Mezzanine Loan with an Initial Maturity Date of April 2022
Debt Investments Held [Abstract]
Future Funding Obligations	0
Senior Financing	147,000
Carrying Value	24,932	24,913
Total fixed rate | Mezzanine Loan, with an Initial Maturity Date of November 2023
Debt Investments Held [Abstract]
Future Funding Obligations	0
Senior Financing	85,097
Carrying Value	12,706	12,699
Total fixed rate | Mezzanine Loan With An Initial Maturity Date Of December 2023
Debt Investments Held [Abstract]
Future Funding Obligations	0
Senior Financing	180,000
Carrying Value	30,000	0
Total fixed rate | Mezzanine Loan with an Initial Maturity Date of June 2024
Debt Investments Held [Abstract]
Future Funding Obligations	0
Senior Financing	115,000
Carrying Value	12,941	12,932
Total fixed rate | Mezzanine Loan, with an Initial Maturity Date of January 2025
Debt Investments Held [Abstract]
Future Funding Obligations	0
Senior Financing	95,000
Carrying Value	30,000	30,000
Total fixed rate | Mezzanine Loan with an Initial Maturity Date of November 2026
Debt Investments Held [Abstract]
Future Funding Obligations	0
Senior Financing	340,000
Carrying Value	11,000	15,000
Total fixed rate | Mezzanine Loan with an Initial Maturity Date of June 2027
Debt Investments Held [Abstract]
Future Funding Obligations	0
Senior Financing	1,712,750
Carrying Value	55,250	55,250
Total fixed rate | Mortgage and Jr Mortgage loan satisfied via foreclosure
Debt Investments Held [Abstract]
Future Funding Obligations	0
Senior Financing	0
Carrying Value	0	250,464
Total fixed rate | Mezzanine Loan Repaid In August 2018
Debt Investments Held [Abstract]
Future Funding Obligations	0
Senior Financing	0
Carrying Value	0	26,366
Total fixed rate | Mortgage Loan Repaid In September 2018 [Member]
Debt Investments Held [Abstract]
Future Funding Obligations	0
Senior Financing	0
Carrying Value	0	239
Total fixed rate | Mezzanine Loan with an Initial Maturity Date of March 2020
Debt Investments Held [Abstract]
Future Funding Obligations	0
Senior Financing	1,160,000
Carrying Value	213,185	204,005
Total floating rate
Debt Investments Held [Abstract]
Future Funding Obligations	156,293
Senior Financing	2,584,037
Carrying value	1,382,837	1,299,650
Total floating rate | Mezzanine Loan with an Initial Maturity Date of January 2019
Debt Investments Held [Abstract]
Future Funding Obligations	0
Senior Financing	45,025
Carrying value	37,499	34,879
Total floating rate | Mezzanine Loan with an Initial Maturity of March 2019
Debt Investments Held [Abstract]
Future Funding Obligations	0
Senior Financing	85,000
Carrying value	15,333	15,381
Total floating rate | Mezzanine Loan With An Initial Maturity Date Of March 2019, 3
Debt Investments Held [Abstract]
Future Funding Obligations	0
Senior Financing	65,000
Carrying value	14,822	14,869
Total floating rate | Mezzanine Loan with an Initial Maturity of March 2019, 2
Debt Investments Held [Abstract]
Future Funding Obligations	0
Senior Financing	38,000
Carrying value	21,990	21,939
Total floating rate | Mezzanine Loan with an Initial Maturity Date of April 2019
Debt Investments Held [Abstract]
Future Funding Obligations	0
Senior Financing	40,000
Carrying value	19,986	19,982
Total floating rate | Mezzanine Loan With An Initial Maturity Date Of April 2019, 4
Debt Investments Held [Abstract]
Future Funding Obligations	0
Senior Financing	265,000
Carrying value	24,961	24,830
Total floating rate | Mortgage/Jr Mortgage Participate Loan, Maturity Date of August 2019
Debt Investments Held [Abstract]
Future Funding Obligations	40,530
Senior Financing	233,086
Carrying value	84,012	71,832
Total floating rate | Mezzanine Loan With An Initial Maturity Date Of August 2019
Debt Investments Held [Abstract]
Future Funding Obligations	0
Senior Financing	65,000
Carrying value	14,998	14,955
Total floating rate | Mortgage/Mezzanine Loan With An Initial Maturity Date Of August 2019
Debt Investments Held [Abstract]
Future Funding Obligations	0
Senior Financing	0
Carrying value	19,999	19,940
Total floating rate | Mortgage/Mezzanine Loan with an Initial Maturity of September 2019
Debt Investments Held [Abstract]
Future Funding Obligations	1,027
Senior Financing	0
Carrying value	154,070	143,919
Total floating rate | Mezzanine Loan with an Initial Maturity of October 2019
Debt Investments Held [Abstract]
Future Funding Obligations	0
Senior Financing	350,000
Carrying value	34,886	34,737
Total floating rate | Mortgage/Mezzanine Loan with an Initial Maturity of January 2020
Debt Investments Held [Abstract]
Future Funding Obligations	7,243
Senior Financing	0
Carrying value	62,493	43,845
Total floating rate | Mezzanine Loan with an Initial Maturity of January 2020
Debt Investments Held [Abstract]
Future Funding Obligations	559
Senior Financing	575,955
Carrying value	79,164	75,834
Total floating rate | Mortgage Loan with an Initial Maturity of February 2020
Debt Investments Held [Abstract]
Future Funding Obligations	11,204
Senior Financing	0
Carrying value	88,501	0
Total floating rate | Mezzanine Loan with an Initial Maturity Date of March 2020
Debt Investments Held [Abstract]
Future Funding Obligations	1,277
Senior Financing	322,300
Carrying value	53,402	0
Total floating rate | Mortgage and Mezzanine Loan with an Initial Maturity Date of April 2020
Debt Investments Held [Abstract]
Future Funding Obligations	14,860
Senior Financing	0
Carrying value	277,694	0
Total floating rate | Mortgage And Mezzanine Loan With An Initial Maturity Date Of June 2020
Debt Investments Held [Abstract]
Future Funding Obligations	0
Senior Financing	0
Carrying value	37,094	0
Total floating rate | Mezzanine Loan with an Initial Maturity of July 2020
Debt Investments Held [Abstract]
Future Funding Obligations	7,887
Senior Financing	38,167
Carrying value	12,627	11,259
Total floating rate | Mortgage And Mezzanine Loan With An Initial Maturity Date Of October 2020
Debt Investments Held [Abstract]
Future Funding Obligations	0
Senior Financing	0
Carrying value	83,449	0
Total floating rate | Mezzanine Loan with an Initial Maturity of November 2020
Debt Investments Held [Abstract]
Future Funding Obligations	38,575
Senior Financing	362,908
Carrying value	88,817	75,428
Total floating rate | Mortgage/Mezzanine Loan with an Initial Maturity of December 2020
Debt Investments Held [Abstract]
Future Funding Obligations	33,131
Senior Financing	0
Carrying value	98,804	88,989
Total floating rate | Mortgage/Mezzanine Loan with an Initial Maturity of December 2020, 2
Debt Investments Held [Abstract]
Future Funding Obligations	0
Senior Financing	0
Carrying value	35,266	35,152
Total floating rate | Jr Mortgage Participation/Mezzanine Loan with an Initial Maturity of July 2021
Debt Investments Held [Abstract]
Future Funding Obligations	0
Senior Financing	60,000
Carrying value	15,665	15,635
Total floating rate | Mezzanine Loan With An Initial Maturity Date Of December 2021
Debt Investments Held [Abstract]
Future Funding Obligations	0
Senior Financing	38,596
Carrying value	7,305	34,947
Total floating rate | Mortgage/Mezzanine Loan Repaid In February 2018, 2
Debt Investments Held [Abstract]
Future Funding Obligations	0
Senior Financing	0
Carrying value	0	162,553
Total floating rate | Mortgage/Mezzanine Loan repaid in February 2018
Debt Investments Held [Abstract]
Future Funding Obligations	0
Senior Financing	0
Carrying value	0	74,755
Total floating rate | Mezzanine Loan Sold In 2018
Debt Investments Held [Abstract]
Future Funding Obligations	0
Senior Financing	0
Carrying value	0	23,609
Total floating rate | Mortgage And Mezzanine Loan Repaid In 2018
Debt Investments Held [Abstract]
Future Funding Obligations	0
Senior Financing	0
Carrying value	0	16,969
Total floating rate | Mezzanine Loan Repaid In 2018
Debt Investments Held [Abstract]
Future Funding Obligations	0
Senior Financing	0
Carrying value	0	59,723
Total floating rate | Mezzanine Loan Repaid In 2018, 2
Debt Investments Held [Abstract]
Future Funding Obligations	0
Senior Financing	0
Carrying value	0	37,851
Total floating rate | Mezzanine Loan Repaid In 2018, 3
Debt Investments Held [Abstract]
Future Funding Obligations	0
Senior Financing	0
Carrying value	0	14,855
Total floating rate | Mezzanine Loan Exchanged For Property In 2018
Debt Investments Held [Abstract]
Future Funding Obligations	0
Senior Financing	0
Carrying value	0	12,174
Total floating rate | Mezzanine Loan Exchanged For Property In 2018, 2
Debt Investments Held [Abstract]
Future Funding Obligations	0
Senior Financing	0
Carrying value	0	10,934
Total floating rate | Mezzanine Loan Repaid In 2018, 4
Debt Investments Held [Abstract]
Future Funding Obligations	0
Senior Financing	0
Carrying value	0	37,250
Total floating rate | Mezzanine Loan Repaid In 2018, 5
Debt Investments Held [Abstract]
Future Funding Obligations	0
Senior Financing	0
Carrying value	0	15,148
Total floating rate | Mezzanine Loan Repaid In 2018, 6
Debt Investments Held [Abstract]
Future Funding Obligations	0
Senior Financing	0
Carrying value	0	8,550
Total floating rate | Mezzanine Loan Exchanged For Property In 2018, 3
Debt Investments Held [Abstract]
Future Funding Obligations	0
Senior Financing	0
Carrying value	$ 0	$ 26,927

XML

Debt and Preferred Equity Investments - Preferred Equity Investments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Preferred equity investment
Mortgage loans on real estate, interest rate	8.99%
Carrying value	$ 2,099,393	$ 2,114,041
Preferred Equity, April 2021
Preferred equity investment
Future Funding Obligations	0
Senior Financing	272,000
Carrying value	143,183	144,423
Preferred Equity Redeemed in May 2017
Preferred equity investment
Future Funding Obligations	0
Senior Financing	1,768,000
Carrying value	$ 143,274	0
Preferred equity investments
Preferred equity investment
Mortgage loans on real estate, interest rate	9.12%
Future Funding Obligations	$ 0
Senior Financing	2,040,000
Carrying value	$ 286,457	$ 144,423

XML

Debt and Preferred Equity Investments - Narrative (Details)	1 Months Ended	12 Months Ended
	Sep. 30, 2014 USD ($)	Dec. 31, 2018 USD ($) loan segment	Dec. 31, 2017 USD ($) segment	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)
Preferred equity investment
Allowance for loan and lease losses		$ 5,750,000	$ 0	$ 0	$ 0
Number of investments marketed for sale | loan		2
Unpaid principal balance		$ 159,900,000
Carrying value		$ 2,099,393,000	$ 2,114,041,000
Number of portfolio segments of financial receivables (segment) | segment		1	1
Additional amount of financing receivables included in other assets		$ 88,800,000	$ 65,500,000
Financing receivable, nonaccrual status		$ 28,400,000
Weighted average risk rating		1.2
Junior Mortgage Participation Acquired in September 2014
Preferred equity investment
Payments to acquire loans receivable	$ 0
Carrying value			$ 0
Financing Receivables, Equal to Greater than 90 Days Past Due
Preferred equity investment
Financing receivable, past due		$ 0

XML

Investments in Unconsolidated Joint Ventures - Additional Information (Details) $ in Thousands		1 Months Ended						2 Months Ended	3 Months Ended				12 Months Ended
	Jan. 01, 2018 USD ($)	Jan. 31, 2019 USD ($)	Feb. 28, 2018	Feb. 22, 2018	Nov. 30, 2017	Oct. 31, 2016 ft²	Aug. 31, 2016 ft²	Mar. 31, 2018 property	Dec. 31, 2018 USD ($) ft² unit	Sep. 30, 2018 USD ($)	Jun. 30, 2018 USD ($)	Mar. 31, 2018 USD ($)	Dec. 31, 2018 USD ($) ft² unit	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Sep. 30, 2017 USD ($)
General information on each joint venture
Investments in unconsolidated joint ventures									$ 3,019,020				$ 3,019,020	$ 2,362,989
Net equity investment in VIEs									$ 808,300				$ 808,300	606,200
Approximate Square Feet | ft²									30,177,253				30,177,253
Purchase price and other fair value adjustment									$ 0	$ (3,057)	$ 11,149	$ 49,293	$ 57,385	$ 0	$ 0
11 Madison Avenue
General information on each joint venture
Approximate Square Feet | ft²							2,314,000
Ownership percentage in disposed asset							40.00%
400 East 57th Street
General information on each joint venture
Approximate Square Feet | ft²						290,482
Ownership percentage in disposed asset						49.00%
21 East 66th Street | Three Retail and Two Residential Units
General information on each joint venture
Ownership Interest Sold									32.28%				32.28%
Number of Stores | unit									3				3
Number of residential units | unit									2				2
21 East 66th Street | Three Residential Units
General information on each joint venture
Ownership Interest Sold									16.14%				16.14%
Number of residential units | unit									3				3
Stonehenge Portfolio
General information on each joint venture
Ownership Interest Sold						90.00%
Disposal group, number of properties | property								2
400 East 57th Street
General information on each joint venture
Ownership Interest Sold									51.00%				51.00%
One Vanderbilt
General information on each joint venture
Investment in joint venture, aggregate equity committed by partner																$ 525,000
Investment in joint venture, aggregate maximum ownership percentage																29.00%
Investment in joint venture, partners' ownership percentage																23.40%
1515 Broadway
General information on each joint venture
Gain on disposal	$ 600,000
1552 Broadway
General information on each joint venture
Approximate Square Feet | ft²									13,045				13,045
Joint venture
General information on each joint venture
Investments in unconsolidated joint ventures									$ 3,019,020				$ 3,019,020
Equity method investments with negative book value									$ 85,800				$ 85,800
Joint venture | 100 Park Avenue
General information on each joint venture
Ownership Interest Sold									49.90%				49.90%
Economic Interest, percent									49.90%				49.90%
Approximate Square Feet | ft²									834,000				834,000
Acquisition Price									$ 95,800				$ 95,800
Joint venture | 717 Fifth Avenue
General information on each joint venture
Ownership Interest Sold									10.92%				10.92%
Approximate Square Feet | ft²									119,500				119,500
Acquisition Price									$ 251,900				$ 251,900
Joint venture | 800 Third Avenue
General information on each joint venture
Ownership Interest Sold									60.52%				60.52%
Economic Interest, percent									60.52%				60.52%
Approximate Square Feet | ft²									526,000				526,000
Acquisition Price									$ 285,000				$ 285,000
Joint venture | 919 Third Avenue
General information on each joint venture
Ownership Interest Sold									51.00%				51.00%
Economic Interest, percent									51.00%				51.00%
Approximate Square Feet | ft²									1,454,000				1,454,000
Acquisition Price									$ 1,256,727				$ 1,256,727
Joint venture | 11 West 34th Street
General information on each joint venture
Ownership Interest Sold									30.00%				30.00%
Economic Interest, percent									30.00%				30.00%
Approximate Square Feet | ft²									17,150				17,150
Acquisition Price									$ 10,800				$ 10,800
Joint venture | 280 Park Avenue
General information on each joint venture
Ownership Interest Sold									50.00%				50.00%
Economic Interest, percent									50.00%				50.00%
Approximate Square Feet | ft²									1,219,158				1,219,158
Acquisition Price									$ 400,000				$ 400,000
Joint venture | 1552-1560 Broadway
General information on each joint venture
Ownership Interest Sold									50.00%				50.00%
Economic Interest, percent									50.00%				50.00%
Approximate Square Feet | ft²									57,718				57,718
Acquisition Price									$ 136,550				$ 136,550
Joint venture | 10 East 53rd Street
General information on each joint venture
Ownership Interest Sold									55.00%				55.00%
Economic Interest, percent									55.00%				55.00%
Approximate Square Feet | ft²									354,300				354,300
Acquisition Price									$ 252,500				$ 252,500
Joint venture | 521 Fifth Avenue
General information on each joint venture
Ownership Interest Sold									50.50%				50.50%
Economic Interest, percent									50.50%				50.50%
Approximate Square Feet | ft²									460,000				460,000
Acquisition Price									$ 315,000				$ 315,000
Joint venture | 21 East 66th Street
General information on each joint venture
Ownership Interest Sold									32.28%				32.28%
Economic Interest, percent									32.28%				32.28%
Approximate Square Feet | ft²									13,069				13,069
Acquisition Price									$ 75,000				$ 75,000
Joint venture | 650 Fifth Avenue
General information on each joint venture
Ownership Interest Sold									50.00%				50.00%
Approximate Square Feet | ft²									69,214				69,214
Acquisition Price									$ 0				$ 0
Joint venture | 121 Greene Street
General information on each joint venture
Ownership Interest Sold									50.00%				50.00%
Economic Interest, percent									50.00%				50.00%
Approximate Square Feet | ft²									7,131				7,131
Acquisition Price									$ 27,400				$ 27,400
Joint venture | 55 West 46th Street
General information on each joint venture
Ownership Interest Sold									25.00%				25.00%
Economic Interest, percent									25.00%				25.00%
Approximate Square Feet | ft²									347,000				347,000
Acquisition Price									$ 295,000				$ 295,000
Joint venture | Stonehenge Portfolio
General information on each joint venture
Ownership Interest Sold						10.00%
Approximate Square Feet | ft²									1,439,016				1,439,016
Acquisition Price									$ 36,668				$ 36,668
Joint venture | 131-137 Spring Street
General information on each joint venture
Ownership Interest Sold									20.00%				20.00%
Economic Interest, percent									20.00%				20.00%
Approximate Square Feet | ft²									68,342				68,342
Acquisition Price									$ 277,750				$ 277,750
Joint venture | 605 West 42nd Street
General information on each joint venture
Ownership Interest Sold									20.00%				20.00%
Economic Interest, percent									20.00%				20.00%
Approximate Square Feet | ft²									927,358				927,358
Acquisition Price									$ 759,000				$ 759,000
Joint venture | 11 Madison Avenue
General information on each joint venture
Ownership Interest Sold									60.00%				60.00%
Economic Interest, percent									60.00%				60.00%
Approximate Square Feet | ft²									2,314,000				2,314,000
Acquisition Price									$ 2,605,000				$ 2,605,000
Joint venture | 333 East 22nd St
General information on each joint venture
Ownership Interest Sold									33.33%				33.33%
Economic Interest, percent									33.33%				33.33%
Approximate Square Feet | ft²									26,926				26,926
Acquisition Price									$ 0				$ 0
Joint venture | 400 East 57th Street
General information on each joint venture
Ownership Interest Sold									51.00%				51.00%
Economic Interest, percent									41.00%				41.00%
Approximate Square Feet | ft²									290,482				290,482
Acquisition Price									$ 170,000				$ 170,000
Joint venture | One Vanderbilt
General information on each joint venture
Ownership Interest Sold									71.01%				71.01%
Economic Interest, percent									71.01%				71.01%
Approximate Square Feet | ft²									0				0
Acquisition Price									$ 3,310,000				$ 3,310,000
Joint venture | Worldwide Plaza
General information on each joint venture
Ownership Interest Sold									24.35%				24.35%
Economic Interest, percent									24.35%				24.35%
Approximate Square Feet | ft²									2,048,725				2,048,725
Acquisition Price									$ 1,725,000				$ 1,725,000
Joint venture | 1515 Broadway
General information on each joint venture
Ownership Interest Sold									56.87%				56.87%
Economic Interest, percent									56.87%				56.87%
Approximate Square Feet | ft²									1,750,000				1,750,000
Acquisition Price									$ 1,950,000				$ 1,950,000
Joint venture | 2 Herald Square
General information on each joint venture
Ownership Interest Sold									51.00%				51.00%
Economic Interest, percent									51.00%				51.00%
Approximate Square Feet | ft²									369,000				369,000
Acquisition Price									$ 266,000				$ 266,000
Allianz Real Estate | 1515 Broadway
General information on each joint venture
Ownership percentage in disposed asset			13.00%	12.87%	30.13%
Subsequent Event | Joint venture | 131-137 Spring Street
General information on each joint venture
Proceeds from sale of interest in property		$ 15,200
919 Third Avenue | Joint venture | 919 Third Avenue
General information on each joint venture
Purchase price and other fair value adjustment													$ 49,300

XML

Investments in Unconsolidated Joint Ventures - Acquisition, Development and Construction Arrangements/Sale of Joint Venture Interest or Property (Details) $ in Thousands	1 Months Ended												3 Months Ended								9 Months Ended	12 Months Ended
	Nov. 30, 2018 USD ($)	Jul. 31, 2018 USD ($)	Jun. 30, 2018 USD ($)	May 31, 2018 USD ($)	Apr. 30, 2018 USD ($)	Mar. 31, 2018 USD ($)	Feb. 28, 2018 USD ($)	May 31, 2017 USD ($)	Sep. 30, 2016 USD ($)	May 31, 2016 USD ($)	Mar. 31, 2016 USD ($)	Feb. 29, 2016 USD ($)	Dec. 31, 2018 USD ($) ft² note	Sep. 30, 2018 USD ($)	Jun. 30, 2018 USD ($)	Mar. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Sep. 30, 2017 USD ($)	Jun. 30, 2017 USD ($)	Mar. 31, 2017 USD ($)	Sep. 30, 2017 USD ($)	Dec. 31, 2018 USD ($) ft² note	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Aug. 31, 2018 USD ($)	Apr. 30, 2017 USD ($) ft²	Dec. 31, 2015
Schedule of Equity Method Investments [Line Items]
Investments in unconsolidated joint ventures													$ 3,019,020				$ 2,362,989					$ 3,019,020	$ 2,362,989
Acquisition, development and construction arrangements, carrying value													44,357				171,539					44,357	171,539
Gain (Loss) on Sale													167,445	$ 70,937	$ 72,025	$ (6,440)	0	$ 1,030	$ 13,089	$ 2,047		303,967	16,166	$ 44,009
Employee-related liabilities													$ 11,700				0					$ 11,700	0	1,100
Approximate Square Feet | ft²													30,177,253									30,177,253
Gain on sale of real estate, net													$ (36,984)	$ (2,504)	$ (14,790)	$ 23,521	76,497	$ 0	$ (3,823)	$ 567		$ (30,757)	73,241	$ 238,116
Participating Financing Due February 2022
Schedule of Equity Method Investments [Line Items]
Investments in unconsolidated joint ventures													44,357				44,823					44,357	44,823
Mezzanine Loan And Preferred Equity, Due March 2018
Schedule of Equity Method Investments [Line Items]
Investments in unconsolidated joint ventures													0				100,000					0	100,000
Mezzanine Loan Due July 2036
Schedule of Equity Method Investments [Line Items]
Investments in unconsolidated joint ventures													0				$ 26,716					0	$ 26,716
747 Madison Avenue
Schedule of Equity Method Investments [Line Items]
Gain on sale of real estate, net								$ 13,000
3 Columbus Circle
Schedule of Equity Method Investments [Line Items]
Ownership Interest Sold	48.90%
Gross asset valuation	$ 851,000
Gain (Loss) on Sale	$ 160,368
Mezzanine Loan
Schedule of Equity Method Investments [Line Items]
Ownership Interest Sold																									33.33%
Gross asset valuation																									$ 15,000
724 Fifth Avenue
Schedule of Equity Method Investments [Line Items]
Ownership Interest Sold		49.90%
Gross asset valuation		$ 365,000
Gain (Loss) on Sale		$ 64,587
Jericho Plaza
Schedule of Equity Method Investments [Line Items]
Ownership Interest Sold			11.67%								11.67%				11.67%												77.78%
Gross asset valuation			$ 117,400												$ 117,400
Gain (Loss) on Sale			$ 147
1745 Broadway
Schedule of Equity Method Investments [Line Items]
Ownership Interest Sold				56.87%
Gross asset valuation				$ 633,000
Gain (Loss) on Sale				$ 52,038
175-225 Third Street Brooklyn, New York
Schedule of Equity Method Investments [Line Items]
Ownership Interest Sold					95.00%
Gross asset valuation					$ 115,000
Gain (Loss) on Sale					$ 19,483
Stonehenge Portfolio
Schedule of Equity Method Investments [Line Items]
Ownership Interest Sold						0.50%										0.50%
Gross asset valuation						$ 287,000										$ 287,000
Gain (Loss) on Sale						$ (5,701)
1515 Broadway
Schedule of Equity Method Investments [Line Items]
Ownership Interest Sold							13.00%
Gross asset valuation							$ 1,950,000						$ 1,950,000									$ 1,950,000
Gain (Loss) on Sale							$ 0
Approximate Square Feet | ft²													1,750,000									1,750,000
1274 Fifth Avenue
Schedule of Equity Method Investments [Line Items]
Ownership Interest Sold							9.83%
Gross asset valuation							$ 44,100
Gain (Loss) on Sale							$ (362)
102 Greene Street
Schedule of Equity Method Investments [Line Items]
Ownership Interest Sold																		10.00%			10.00%
Gross asset valuation																		$ 43,500			$ 43,500					$ 43,500
Gain (Loss) on Sale																					$ 283
Employee-related liabilities																										$ 900
Approximate Square Feet | ft²																										9,200
76 11th Avenue
Schedule of Equity Method Investments [Line Items]
Ownership Interest Sold								33.33%
Gross asset valuation								$ 138,240
Number of notes owned | note													2									2
Stonehenge Portfolio
Schedule of Equity Method Investments [Line Items]
Gross asset valuation								300,000
Gain (Loss) on Sale								$ 871
EOP Denver
Schedule of Equity Method Investments [Line Items]
Ownership Interest Sold																		0.48%			0.48%
Gross asset valuation																		$ 180,700			$ 180,700
Gain (Loss) on Sale									$ 300
33 Beekman
Schedule of Equity Method Investments [Line Items]
Ownership Interest Sold										45.90%
Gross asset valuation										$ 196,000
Gain (Loss) on Sale										33,000
Promote recognized										$ 10,800
EOP Denver
Schedule of Equity Method Investments [Line Items]
Ownership Interest Sold																				4.79%
Gross asset valuation																				$ 180,700
Gain (Loss) on Sale											$ 2,800
7 Renaissance
Schedule of Equity Method Investments [Line Items]
Ownership Interest Sold																				50.00%
Gross asset valuation																				$ 20,700
Gain (Loss) on Sale											$ 4,200
1 Jericho
Schedule of Equity Method Investments [Line Items]
Ownership Interest Sold												66.11%
Gross asset valuation												$ 95,200
Gain (Loss) on Sale												$ 3,300
Joint venture
Schedule of Equity Method Investments [Line Items]
Investments in unconsolidated joint ventures													$ 3,019,020									$ 3,019,020

XML

Investments in Unconsolidated Joint Ventures - Mortgages and Other Loans Payable (Details)	12 Months Ended
	Dec. 31, 2018 USD ($) extension	Dec. 31, 2017 USD ($)	Oct. 31, 2016
Debt Instrument [Line Items]
Long-term debt	$ 1,961,240,000	$ 2,837,282,000
Total fixed rate debt	1,389,717,000	2,400,560,000
Total floating rate debt	598,442,000	465,431,000
Total fixed rate and floating rate debt	1,988,159,000	2,865,991,000
Deferred financing costs, net	(26,919,000)	(28,709,000)
919 Third Avenue
Debt Instrument [Line Items]
Total fixed rate debt	$ 0	500,000,000
400 East 57th Street
Debt Instrument [Line Items]
Ownership Interest Sold	51.00%
Stonehenge Portfolio
Debt Instrument [Line Items]
Ownership Interest Sold			90.00%
Joint venture
Debt Instrument [Line Items]
Total fixed rate debt	$ 5,666,108,000	5,569,138,000
Total floating rate debt	3,387,705,000	3,979,066,000
Total fixed rate and floating rate debt	9,053,813,000	9,548,204,000
Deferred financing costs, net	(103,191,000)	(136,103,000)
Total joint venture mortgages and other loans payable, net	8,950,622,000	9,412,101,000
Joint venture | 1745 Broadway
Debt Instrument [Line Items]
Total floating rate debt	$ 0	345,000,000
Joint venture | 521 Fifth Avenue
Debt Instrument [Line Items]
Economic Interest, percent	50.50%
Interest rate, fixed rate debt (as a percent)	3.73%
Total fixed rate debt	$ 170,000,000	170,000,000
Ownership Interest Sold	50.50%
Joint venture | 717 Fifth Avenue
Debt Instrument [Line Items]
Ownership Interest Sold	10.92%
Joint venture | 717 Fifth Avenue | Mortgage loan
Debt Instrument [Line Items]
Interest rate, fixed rate debt (as a percent)	4.45%
Total fixed rate debt	$ 300,000,000	300,000,000
Committed amount	$ 300,000,000
Joint venture | 717 Fifth Avenue | Mezzanine loans
Debt Instrument [Line Items]
Economic Interest, percent	10.92%
Interest rate, fixed rate debt (as a percent)	5.50%
Total fixed rate debt	$ 355,328,000	355,328,000
Committed amount	$ 355,300,000
Joint venture | 21 East 66th Street
Debt Instrument [Line Items]
Economic Interest, percent	32.28%
Interest rate, fixed rate debt (as a percent)	3.60%
Total fixed rate debt	$ 12,000,000	12,000,000
Total floating rate debt	$ 1,571,000	1,648,000
Ownership Interest Sold	32.28%
Joint venture | 919 Third Avenue
Debt Instrument [Line Items]
Economic Interest, percent	51.00%
Interest rate, fixed rate debt (as a percent)	5.12%
Total fixed rate debt	$ 500,000,000	0
Ownership Interest Sold	51.00%
Joint venture | 1515 Broadway
Debt Instrument [Line Items]
Economic Interest, percent	56.87%
Interest rate, fixed rate debt (as a percent)	3.93%
Total fixed rate debt	$ 855,876,000	872,528,000
Ownership Interest Sold	56.87%
Joint venture | 11 Madison Avenue
Debt Instrument [Line Items]
Economic Interest, percent	60.00%
Interest rate, fixed rate debt (as a percent)	3.84%
Total fixed rate debt	$ 1,400,000,000	1,400,000,000
Ownership Interest Sold	60.00%
Joint venture | 800 Third Avenue
Debt Instrument [Line Items]
Economic Interest, percent	60.52%
Interest rate, fixed rate debt (as a percent)	3.37%
Total fixed rate debt	$ 177,000,000	177,000,000
Ownership Interest Sold	60.52%
Joint venture | 400 East 57th Street
Debt Instrument [Line Items]
Economic Interest, percent	41.00%
Interest rate, fixed rate debt (as a percent)	3.00%
Total fixed rate debt	$ 99,828,000	100,000,000
Ownership Interest Sold	51.00%
Joint venture | Worldwide Plaza
Debt Instrument [Line Items]
Economic Interest, percent	24.35%
Interest rate, fixed rate debt (as a percent)	3.98%
Total fixed rate debt	$ 1,200,000,000	1,200,000,000
Ownership Interest Sold	24.35%
Joint venture | Stonehenge Portfolio
Debt Instrument [Line Items]
Interest rate, fixed rate debt (as a percent)	4.20%
Total fixed rate debt	$ 321,076,000	357,282,000
Ownership Interest Sold			10.00%
Joint venture | Stonehenge Portfolio | Initial Maturity August 2019
Debt Instrument [Line Items]
Total fixed rate debt	134,300,000
Joint venture | Stonehenge Portfolio | Initial Maturity June 2024
Debt Instrument [Line Items]
Total fixed rate debt	54,100,000
Joint venture | Stonehenge Portfolio | Secured Debt, Initial Maturity April 2028
Debt Instrument [Line Items]
Total fixed rate debt	132,600,000
Joint venture | 3 Columbus Circle
Debt Instrument [Line Items]
Total fixed rate debt	0	350,000,000
Joint venture | Jericho Plaza
Debt Instrument [Line Items]
Total floating rate debt	$ 0	81,099,000
Joint venture | 280 Park Avenue
Debt Instrument [Line Items]
Economic Interest, percent	50.00%
Interest rate, floating rate debt (as a percent)	1.73%
Total floating rate debt	$ 1,200,000,000	1,200,000,000
Ownership Interest Sold	50.00%
Joint venture | 10 East 53rd Street
Debt Instrument [Line Items]
Economic Interest, percent	55.00%
Interest rate, floating rate debt (as a percent)	2.25%
Total floating rate debt	$ 170,000,000	170,000,000
Ownership Interest Sold	55.00%
Joint venture | 724 Fifth Avenue
Debt Instrument [Line Items]
Total floating rate debt	$ 0	275,000,000
Joint venture | 55 West 46th Street
Debt Instrument [Line Items]
Economic Interest, percent	25.00%
Interest rate, floating rate debt (as a percent)	2.13%
Total floating rate debt	$ 185,569,000	171,444,000
Committed amount	195,000,000
Unused borrowing capacity, amount	$ 9,400,000
Ownership Interest Sold	25.00%
Joint venture | 175-225 Third Street Brooklyn, New York
Debt Instrument [Line Items]
Total floating rate debt	$ 0	40,000,000
Joint venture | 605 West 42nd Street
Debt Instrument [Line Items]
Economic Interest, percent	20.00%
Total floating rate debt	$ 550,000,000	550,000,000
Ownership Interest Sold	20.00%
Joint venture | 650 Fifth Avenue
Debt Instrument [Line Items]
Ownership Interest Sold	50.00%
Joint venture | 650 Fifth Avenue | Mortgage loan
Debt Instrument [Line Items]
Economic Interest, percent	50.00%
Interest rate, fixed rate debt (as a percent)	4.46%
Long-term debt	$ 210,000,000
Total fixed rate debt	$ 210,000,000	210,000,000
Joint venture | 650 Fifth Avenue | Mezzanine loans
Debt Instrument [Line Items]
Interest rate, fixed rate debt (as a percent)	5.45%
Total fixed rate debt	$ 65,000,000	65,000,000
Joint venture | 650 Fifth Avenue | Mezzanine Loan, Initial Maturity October 2022 | Mezzanine loans
Debt Instrument [Line Items]
Long-term debt	$ 65,000,000
Joint venture | 121 Greene Street
Debt Instrument [Line Items]
Economic Interest, percent	50.00%
Interest rate, floating rate debt (as a percent)	1.50%
Total floating rate debt	$ 15,000,000	15,000,000
Ownership Interest Sold	50.00%
Joint venture | 131-137 Spring Street
Debt Instrument [Line Items]
Economic Interest, percent	20.00%
Interest rate, floating rate debt (as a percent)	1.55%
Total floating rate debt	$ 141,000,000	141,000,000
Ownership Interest Sold	20.00%
Joint venture | 1552-1560 Broadway
Debt Instrument [Line Items]
Economic Interest, percent	50.00%
Interest rate, floating rate debt (as a percent)	2.65%
Total floating rate debt	$ 195,000,000	195,000,000
Ownership Interest Sold	50.00%
Joint venture | 11 West 34th Street
Debt Instrument [Line Items]
Economic Interest, percent	30.00%
Interest rate, floating rate debt (as a percent)	1.45%
Total floating rate debt	$ 23,000,000	23,000,000
Ownership Interest Sold	30.00%
Joint venture | 103 East 86th Street
Debt Instrument [Line Items]
Economic Interest, percent	1.00%
Interest rate, floating rate debt (as a percent)	1.40%
Total floating rate debt	$ 38,000,000	55,340,000
Joint venture | 100 Park Avenue
Debt Instrument [Line Items]
Economic Interest, percent	49.90%
Interest rate, floating rate debt (as a percent)	1.75%
Total floating rate debt	$ 360,000,000	360,000,000
Ownership Interest Sold	49.90%
Joint venture | One Vanderbilt
Debt Instrument [Line Items]
Economic Interest, percent	71.01%
Interest rate, floating rate debt (as a percent)	2.75%
Total floating rate debt	$ 375,000,000	355,535,000
Ownership Interest Sold	71.01%
Joint venture | One Vanderbilt | Construction Loans
Debt Instrument [Line Items]
Maximum facility capacity	$ 1,750,000,000.00
Initial Term (in Years)	5 years
Number of extension options | extension	2
Period of extension option	1 year
Joint venture | 2 Herald Square
Debt Instrument [Line Items]
Economic Interest, percent	51.00%
Interest rate, floating rate debt (as a percent)	1.55%
Total floating rate debt	$ 133,565,000	$ 0
Committed amount	$ 150,000,000
Ownership Interest Sold	51.00%
Joint venture | Weighted Average | 21 East 66th Street
Debt Instrument [Line Items]
Interest rate, floating rate debt (as a percent)	2.75%
Joint venture | Weighted Average | Stonehenge Portfolio
Debt Instrument [Line Items]
Interest rate, floating rate debt (as a percent)
Joint venture | Weighted Average | 605 West 42nd Street
Debt Instrument [Line Items]
Interest rate, floating rate debt (as a percent)	1.44%

XML

Investments in Unconsolidated Joint Ventures - Schedules of Combined Financial Statements for the Unconsolidated Joint Ventures (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Investment in Unconsolidated Joint Ventures
Management fees, base revenue									$ 113,596	$ 172,939	$ 196,858
Assets
Commercial real estate property, net	$ 6,414,798				$ 7,906,006				6,414,798	7,906,006
Cash and cash equivalents	129,475				127,888				129,475	127,888
Tenant and other receivables, related party receivables, and deferred rents receivable, net of allowance	41,589				57,644				41,589	57,644
Debt and preferred equity investments	2,099,393				2,114,041				2,099,393	2,114,041
Other assets	295,679				310,688				295,679	310,688
Liabilities and equity
Mortgages and other loans payable, net	1,961,240				2,837,282				1,961,240	2,837,282
Deferred revenue	94,453				208,119				94,453	208,119
Other liabilities	116,566				188,005				116,566	188,005
Company's investments in unconsolidated joint ventures	3,019,020				2,362,989				3,019,020	2,362,989
Combined statements of income for the unconsolidated joint ventures
Real estate taxes									186,351	244,323	248,388
Ground rent									32,965	33,231	33,261
Interest expense, net of interest income									208,669	257,045	321,199
Amortization of deferred financing costs									12,408	16,498	24,564
Transaction related costs									1,099	(1,834)	7,528
Depreciation and amortization									279,507	403,320	821,041
Total expenses	267,678	$ 265,553	$ 258,303	$ 258,282	314,108	$ 333,913	$ 365,749	$ 332,675	1,049,816	1,346,445	1,868,599
Company's equity in net income from unconsolidated joint ventures (1)	(2,398)	$ 971	$ 4,702	$ 4,036	7,788	$ 4,078	$ 3,412	$ 6,614	7,311	21,892	11,874
Joint venture
Assets
Commercial real estate property, net	14,347,673				12,822,133				14,347,673	12,822,133
Cash and cash equivalents	381,301				494,909				381,301	494,909
Tenant and other receivables, related party receivables, and deferred rents receivable, net of allowance	273,141				349,944				273,141	349,944
Debt and preferred equity investments	44,357				202,539				44,357	202,539
Other assets	2,187,166				1,407,806				2,187,166	1,407,806
Total assets	17,233,638				15,277,331				17,233,638	15,277,331
Liabilities and equity
Mortgages and other loans payable, net	8,950,622				9,412,101				8,950,622	9,412,101
Deferred revenue	1,660,838				985,648				1,660,838	985,648
Other liabilities	946,313				411,053				946,313	411,053
Equity	5,675,865				4,468,529				5,675,865	4,468,529
Total liabilities and equity	17,233,638				$ 15,277,331				17,233,638	15,277,331
Company's investments in unconsolidated joint ventures	$ 3,019,020								3,019,020
Combined statements of income for the unconsolidated joint ventures
Total revenues									1,244,804	904,230	712,689
Operating expenses									219,440	157,610	126,913
Real estate taxes									226,961	142,774	111,673
Ground rent									18,697	16,794	14,924
Interest expense, net of interest income									363,055	250,063	197,741
Amortization of deferred financing costs									21,634	23,026	24,829
Transaction related costs									0	146	5,566
Depreciation and amortization									421,458	279,419	199,011
Total expenses									1,271,245	869,832	680,657
Loss on early extinguishment of debt									0	(7,899)	(1,606)
Net (loss) income before gain on sale (1)									(26,441)	26,499	30,426
Company's equity in net income from unconsolidated joint ventures (1)									7,311	21,892	11,874
Management Service, Base | Joint venture
Investment in Unconsolidated Joint Ventures
Management fees, base revenue									$ 14,200	$ 22,600	$ 4,000

XML

Deferred Costs (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Deferred leasing costs	$ 453,833	$ 443,341
Less: accumulated amortization	(244,723)	(217,140)
Deferred costs, net	$ 209,110	$ 226,201

XML

Mortgages and Other Loans Payable (Details)	3 Months Ended				12 Months Ended
	Dec. 31, 2018 USD ($) debt_instrument	Sep. 30, 2018 USD ($)	Jun. 30, 2018 USD ($)	Mar. 31, 2018 USD ($)	Dec. 31, 2018 USD ($) debt_instrument extension	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Apr. 30, 2018 USD ($)	Jun. 30, 2017 USD ($)	Jul. 31, 2016 USD ($)
Debt Instrument [Line Items]
Total fixed rate debt	$ 1,389,717,000				$ 1,389,717,000	$ 2,400,560,000
Total floating rate debt	598,442,000				598,442,000	465,431,000
Total fixed rate and floating rate debt	1,988,159,000				1,988,159,000	2,865,991,000
Mortgages reclassed to liabilities related to assets held for sale	0				0	0
Total mortgages and other loans payable	1,988,159,000				1,988,159,000	2,865,991,000
Deferred financing costs, net of amortization	(26,919,000)				(26,919,000)	(28,709,000)
Total mortgages and other loans payable	1,961,240,000				1,961,240,000	2,837,282,000
Loss on early extinguishment of debt	14,889,000	$ 2,194,000	$ 0	$ 0	17,083,000	0	$ 0
Collateral already posted, aggregate fair value	3,900,000,000				3,900,000,000	4,800,000,000
Revolving credit facility, net	492,196,000				492,196,000	30,336,000
Series J Preferred Units
Debt Instrument [Line Items]
Total fixed rate debt	0				0	4,000,000
Unsecured Debt
Debt Instrument [Line Items]
Total fixed rate debt	$ 0				$ 0	16,000,000
Uncommitted Master Repurchase Agreements
Debt Instrument [Line Items]
Debt instrument, number of instruments | debt_instrument	2				2
FHLB Facility
Debt Instrument [Line Items]
Total floating rate debt	$ 13,000,000				$ 13,000,000	0
FHLB Facility | Weighted Average
Debt Instrument [Line Items]
Interest rate, floating rate debt (as a percent)	0.27%				0.27%
2017 Master Repurchase Agreement
Debt Instrument [Line Items]
Total floating rate debt	$ 300,000,000				$ 300,000,000	90,809,000
Initial Term (in Years)					1 year
Number of extension options | extension					2
Period of extension option					1 year
Maximum facility capacity								$ 400,000,000.0	$ 300,000,000.0
Extension option exercised, term					1 year
Revolving credit facility, net	$ 299,600,000				$ 299,600,000
2017 Master Repurchase Agreement | Weighted Average
Debt Instrument [Line Items]
Interest rate, floating rate debt (as a percent)	2.34%				2.34%
FHLB Facility, December 2019
Debt Instrument [Line Items]
Total floating rate debt	$ 14,500,000				$ 14,500,000	0
FHLB Facility, December 2019 | Weighted Average
Debt Instrument [Line Items]
Interest rate, floating rate debt (as a percent)	0.18%				0.18%
2016 Master Repurchase Agreement
Debt Instrument [Line Items]
Initial Term (in Years)					2 years
Period of extension option					1 year
Maximum facility capacity										$ 300,000,000.0
Basis point fee (as a percent)					0.25%
Threshold amount for basis point fee to be applicable (less than)					$ 150,000,000.0
2016 Master Repurchase Agreement | Minimum | LIBOR
Debt Instrument [Line Items]
Credit facility, interest rate (as a percent)					2.25%
2016 Master Repurchase Agreement | Maximum | LIBOR
Debt Instrument [Line Items]
Credit facility, interest rate (as a percent)					4.00%
762 Madison Avenue
Debt Instrument [Line Items]
Total fixed rate debt	$ 771,000				$ 771,000	771,000
762 Madison Avenue | Weighted Average
Debt Instrument [Line Items]
Interest rate, fixed rate debt (as a percent)	5.00%				5.00%
100 Church Street
Debt Instrument [Line Items]
Total fixed rate debt	$ 213,208,000				$ 213,208,000	217,273,000
100 Church Street | Weighted Average
Debt Instrument [Line Items]
Interest rate, fixed rate debt (as a percent)	4.68%				4.68%
420 Lexington Avenue
Debt Instrument [Line Items]
Total fixed rate debt	$ 300,000,000				$ 300,000,000	300,000,000
420 Lexington Avenue | Weighted Average
Debt Instrument [Line Items]
Interest rate, fixed rate debt (as a percent)	3.99%				3.99%
400 East 58th Street
Debt Instrument [Line Items]
Total fixed rate debt	$ 39,931,000				$ 39,931,000	40,000,000
400 East 58th Street | Weighted Average
Debt Instrument [Line Items]
Interest rate, fixed rate debt (as a percent)	3.00%				3.00%
Initial Term (in Years)					5 years
1080 Amsterdam
Debt Instrument [Line Items]
Secured debt, bearing fixed interest, mortgage amount	$ 35,500,000				$ 35,500,000
Secured debt, bearing fixed interest, subordinate loan amount	$ 900,000				$ 900,000
1080 Amsterdam | Weighted Average
Debt Instrument [Line Items]
Initial Term (in Years)					5 years
1080 Amsterdam | Mortgage loan | Weighted Average
Debt Instrument [Line Items]
Interest rate, fixed rate debt (as a percent)	3.50%				3.50%
1080 Amsterdam | Senior Subordinated Loans | Weighted Average
Debt Instrument [Line Items]
Interest rate, fixed rate debt (as a percent)	7.00%				7.00%
Landmark Square
Debt Instrument [Line Items]
Total fixed rate debt	$ 100,000,000				$ 100,000,000	100,000,000
Landmark Square | Weighted Average
Debt Instrument [Line Items]
Interest rate, fixed rate debt (as a percent)	4.90%				4.90%
485 Lexington Avenue
Debt Instrument [Line Items]
Total fixed rate debt	$ 450,000,000				$ 450,000,000	450,000,000
485 Lexington Avenue | Weighted Average
Debt Instrument [Line Items]
Interest rate, fixed rate debt (as a percent)	4.25%				4.25%
1080 Amsterdam Avenue
Debt Instrument [Line Items]
Total fixed rate debt	$ 35,807,000				$ 35,807,000	36,363,000
1080 Amsterdam Avenue | Weighted Average
Debt Instrument [Line Items]
Interest rate, fixed rate debt (as a percent)	3.58%				3.58%
315 West 33rd Street
Debt Instrument [Line Items]
Total fixed rate debt	$ 250,000,000				$ 250,000,000	250,000,000
315 West 33rd Street | Weighted Average
Debt Instrument [Line Items]
Interest rate, fixed rate debt (as a percent)	4.17%				4.17%
919 Third Avenue
Debt Instrument [Line Items]
Total fixed rate debt	$ 0				$ 0	500,000,000
One Madison Avenue
Debt Instrument [Line Items]
Total fixed rate debt		$ 0				486,153,000
Loss on early extinguishment of debt					14,900,000
113 Greene Street
Debt Instrument [Line Items]
Total floating rate debt	$ 15,523,000				$ 15,523,000	0
113 Greene Street | Weighted Average
Debt Instrument [Line Items]
Interest rate, floating rate debt (as a percent)	2.00%				2.00%
185 Broadway
Debt Instrument [Line Items]
Total floating rate debt	$ 111,869,000				$ 111,869,000	58,000,000
185 Broadway | Weighted Average
Debt Instrument [Line Items]
Interest rate, floating rate debt (as a percent)	2.85%				2.85%
712 Madison Avenue
Debt Instrument [Line Items]
Total floating rate debt	$ 28,000,000				$ 28,000,000	0
712 Madison Avenue | Weighted Average
Debt Instrument [Line Items]
Interest rate, floating rate debt (as a percent)	2.50%				2.50%
115 Spring Street
Debt Instrument [Line Items]
Total floating rate debt	$ 65,550,000				$ 65,550,000	0
115 Spring Street | Weighted Average
Debt Instrument [Line Items]
Interest rate, floating rate debt (as a percent)	3.40%				3.40%
719 Seventh Avenue
Debt Instrument [Line Items]
Total floating rate debt	$ 50,000,000				$ 50,000,000	41,622,000
719 Seventh Avenue | Weighted Average
Debt Instrument [Line Items]
Interest rate, floating rate debt (as a percent)	1.20%				1.20%
220 East 42nd Street
Debt Instrument [Line Items]
Total floating rate debt	$ 0				$ 0	275,000,000
220 East 42nd Street | Weighted Average
Debt Instrument [Line Items]
Interest rate, floating rate debt (as a percent)
Construction Loans | 185 Broadway
Debt Instrument [Line Items]
Initial Term (in Years)					3 years
Number of extension options | extension					2
Period of extension option					1 year
Maximum facility capacity	$ 225,000,000.0				$ 225,000,000.0
Ticonderoga
Debt Instrument [Line Items]
FHLB advances, amount of advances	$ 13,000,000				$ 13,000,000	$ 14,500,000
Ticonderoga | LIBOR
Debt Instrument [Line Items]
Credit facility, interest rate (as a percent)					0.00%	0.00%

XML

Corporate Indebtedness - Additional Information (Details)	12 Months Ended
	Dec. 31, 2018 USD ($) extension	Dec. 31, 2017 USD ($)
Corporate Indebtedness
Outstanding under line of credit facility	$ 492,196,000	$ 30,336,000
Long-term debt	$ 1,961,240,000	2,837,282,000
Revolving credit facility
Corporate Indebtedness
Facility fee (as a percent)	0.20%
Outstanding under line of credit facility	$ 500,000,000
Revolving credit facility | Minimum
Corporate Indebtedness
Facility fee (as a percent)	0.125%
Revolving credit facility | Maximum
Corporate Indebtedness
Facility fee (as a percent)	0.30%
2012 Credit Facility
Corporate Indebtedness
Credit facility, maximum borrowing capacity	$ 1,500,000,000
Letters of credit	11,800,000
Ability to borrow under line of credit facility		1,000,000,000
Line of Credit | Term loan
Corporate Indebtedness
Long-term debt	1,500,000,000	1,500,000,000
Line of Credit | 2012 Credit Facility
Corporate Indebtedness
Long-term debt	492,200,000	$ 30,300,000
Term loan | Term Loan A, Maturity March 31, 2023
Corporate Indebtedness
Credit facility, maximum borrowing capacity	$ 1,300,000,000.0
Term loan | Term Loan A, Maturity March 31, 2023 | LIBOR
Corporate Indebtedness
Interest rate added to base rate (as a percent)	1.10%
Term loan | Term Loan A, Maturity March 31, 2023 | LIBOR | Minimum
Corporate Indebtedness
Interest rate added to base rate (as a percent)	0.90%
Term loan | Term Loan A, Maturity March 31, 2023 | LIBOR | Maximum
Corporate Indebtedness
Interest rate added to base rate (as a percent)	1.75%
Term loan | Term Loan B, Maturity November 21, 2024
Corporate Indebtedness
Credit facility, maximum borrowing capacity	$ 200,000,000.0
Term loan | Term Loan B, Maturity November 21, 2024 | LIBOR
Corporate Indebtedness
Interest rate added to base rate (as a percent)	1.65%
Term loan | Term Loan B, Maturity November 21, 2024 | LIBOR | Minimum
Corporate Indebtedness
Interest rate added to base rate (as a percent)	1.50%
Term loan | Term Loan B, Maturity November 21, 2024 | LIBOR | Maximum
Corporate Indebtedness
Interest rate added to base rate (as a percent)	2.45%
Revolving credit facility | Line of Credit | Revolving Credit Facility, Maturity March 31, 2022
Corporate Indebtedness
Credit facility, maximum borrowing capacity	$ 1,500,000,000.0
Number of extensions | extension	2
Term of extension	6 months
Maximum borrowing capacity, optional expansion	$ 4,500,000,000
Revolving credit facility | Line of Credit | Revolving Credit Facility, Maturity March 31, 2022 | LIBOR
Corporate Indebtedness
Interest rate added to base rate (as a percent)	1.00%
Revolving credit facility | Line of Credit | Revolving Credit Facility, Maturity March 31, 2022 | LIBOR | Minimum
Corporate Indebtedness
Interest rate added to base rate (as a percent)	0.825%
Revolving credit facility | Line of Credit | Revolving Credit Facility, Maturity March 31, 2022 | LIBOR | Maximum
Corporate Indebtedness
Interest rate added to base rate (as a percent)	1.55%

XML

Corporate Indebtedness - Senior Unsecured Notes (Details) - USD ($)	1 Months Ended	12 Months Ended
	Oct. 31, 2017	Dec. 31, 2018	Dec. 31, 2017
Debt disclosures by scheduled maturity date
Unpaid Principal Balance		$ 5,588,159,000
Accreted Balance		1,495,214,000	$ 1,395,939,000
Deferred financing costs, net		(26,919,000)	(28,709,000)
Senior Unsecured Bonds | 4.50% Senior Unsecured Bonds Due December 2022
Debt disclosures by scheduled maturity date
Coupon Rate (as a percent)	4.50%
Face amount of loan	$ 100,000,000.0
Redemption price, percentage	105.334%
Senior unsecured notes
Debt disclosures by scheduled maturity date
Unpaid Principal Balance		1,500,000,000
Accreted Balance		1,503,759,000	1,404,605,000
Deferred financing costs, net		(8,545,000)	(8,666,000)
Senior Notes, Net of Deferred Finance Costs		1,495,214,000	1,395,939,000
Senior unsecured notes | 3.00% Senior unsecured notes maturing on October 15, 2017
Debt disclosures by scheduled maturity date
Unpaid Principal Balance		0
Accreted Balance		0	249,953,000
Senior unsecured notes | 7.75% Senior unsecured notes maturing on March 15, 2020
Debt disclosures by scheduled maturity date
Unpaid Principal Balance		250,000,000
Accreted Balance		$ 250,000,000	250,000,000
Coupon Rate (as a percent)		7.75%
Initial Term (in Years)		10 years
Senior unsecured notes | 0.98% Senior unsecured notes maturing August 2021
Debt disclosures by scheduled maturity date
Unpaid Principal Balance		$ 350,000,000
Accreted Balance		$ 350,000,000	0
Coupon Rate (as a percent)		0.98%
Initial Term (in Years)		3 years
Senior unsecured notes | 3.25% Senior unsecured notes maturing October 2022
Debt disclosures by scheduled maturity date
Unpaid Principal Balance		$ 500,000,000
Accreted Balance		$ 499,591,000	499,489,000
Coupon Rate (as a percent)		3.25%
Initial Term (in Years)		5 years
Senior unsecured notes | 4.50% Senior unsecured notes maturing on December 1, 2022
Debt disclosures by scheduled maturity date
Unpaid Principal Balance		$ 300,000,000
Accreted Balance		$ 304,168,000	305,163,000
Coupon Rate (as a percent)		4.50%
Initial Term (in Years)		10 years
Senior unsecured notes | 4.27% Senior unsecured notes maturing on December 17, 2025
Debt disclosures by scheduled maturity date
Unpaid Principal Balance		$ 100,000,000
Accreted Balance		$ 100,000,000	$ 100,000,000
Coupon Rate (as a percent)		4.27%
Initial Term (in Years)		10 years

XML

Corporate Indebtedness - Junior Subordinated Deferrable Interest Debentures and Principal Maturities (Details) - USD ($)	1 Months Ended	12 Months Ended
	Jun. 30, 2005	Dec. 31, 2018
Principal Repayments and Joint Venture Debt
2019		$ 33,741,000
2020		576,640,000
2021		501,505,000
2022		1,008,017,000
2023		1,922,851,000
Thereafter		1,545,405,000
Scheduled Amortization and Principal Repayments
Total fixed rate and floating rate debt		$ 5,588,159,000
Trust Preferred Securities
Debt Instrument [Line Items]
Proceeds from issuance of debt	$ 100,000,000.0
Trust Preferred Securities | LIBOR
Debt Instrument [Line Items]
Interest rate added to base rate (as a percent)		1.25%
Joint venture
Principal Repayments and Joint Venture Debt
2019		$ 115,295,000
2020		278,791,000
2021		518,371,000
2022		220,810,000
2023		277,996,000
Thereafter		2,430,198,000
Repayments of principal		3,841,461,000
Joint venture | Trust Preferred Securities
Principal Repayments and Joint Venture Debt
2019		0
2020		0
2021		0
2022		0
2023		0
Thereafter		100,000,000
Scheduled Amortization and Principal Repayments
Total fixed rate and floating rate debt		100,000,000
Joint venture | Mortgages and other loans payable
Scheduled Amortization
2019		6,241,000
2020		11,117,000
2021		11,636,000
2022		9,429,000
2023		7,301,000
Thereafter		9,290,000
Principal Repayments and Joint Venture Debt
2019		27,500,000
2020		315,523,000
2021		139,869,000
2022		198,588,000
2023		115,550,000
Thereafter		1,136,115,000
Future Amortization of Debt		55,014,000
Repayments of principal		1,933,145,000
Joint venture | Revolving Credit Facility
Principal Repayments and Joint Venture Debt
2019		0
2020		0
2021		0
2022		0
2023		500,000,000
Thereafter		0
Scheduled Amortization and Principal Repayments
Total fixed rate and floating rate debt		500,000,000
Joint venture | Unsecured Term Loans
Principal Repayments and Joint Venture Debt
2019		0
2020		0
2021		0
2022		0
2023		1,300,000,000
Thereafter		200,000,000
Scheduled Amortization and Principal Repayments
Total fixed rate and floating rate debt		1,500,000,000
Joint venture | Senior Unsecured Notes
Principal Repayments and Joint Venture Debt
2019		0
2020		250,000,000
2021		350,000,000
2022		800,000,000
2023		0
Thereafter		100,000,000
Scheduled Amortization and Principal Repayments
Total fixed rate and floating rate debt		$ 1,500,000,000

XML

Corporate Indebtedness - Schedule of Consolidated Interest Expense, Excluding Capitalized Interest (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Interest expense
Interest expense before capitalized interest	$ 244,788	$ 284,649	$ 348,062
Interest capitalized	(34,162)	(26,020)	(24,067)
Interest income	(1,957)	(1,584)	(2,796)
Interest expense, net	$ 208,669	$ 257,045	$ 321,199

XML

Related Party Transactions (Details) - USD ($) $ in Thousands	1 Months Ended	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Related Party Transaction [Line Items]
Operating expenses, paid to related parties		$ 17,823	$ 21,400	$ 21,890
Amounts due from/to related parties
Due from joint ventures		18,655	15,025
Other		9,378	8,014
Related party receivables		28,033	23,039
Alliance Building Services
Related Party Transaction [Line Items]
Profit participation from related party		3,900	3,900	3,500
Operating expenses, paid to related parties		18,800	22,600	23,400
Entity with Stephen L Green ownership interest
Related Party Transaction [Line Items]
Property management fees from related party		$ 600	$ 500	700
One Vanderbilt | Marc Holliday
Related Party Transaction [Line Items]
Due from (to) related party	$ 1,400			1,400
One Vanderbilt | Andrew Mathias
Related Party Transaction [Line Items]
Due from (to) related party	$ 1,000			$ 1,000
One Vanderbilt | Holiday and Mathias
Amounts due from/to related parties
Stabilization of property, within three years after stabilization, percent		50.00%
Stabilization of property, three years or more after stabilization, percent		100.00%
Stabilization of property, anniversary period		7 years
One Vanderbilt | Minimum | Marc Holliday
Related Party Transaction [Line Items]
Percentage of profits due to investors	150.00%
One Vanderbilt | Minimum | Andrew Mathias
Related Party Transaction [Line Items]
Percentage of profits due to investors	100.00%
One Vanderbilt | Maximum | Marc Holliday
Related Party Transaction [Line Items]
Percentage of profits due to investors	180.00%
One Vanderbilt | Maximum | Andrew Mathias
Related Party Transaction [Line Items]
Percentage of profits due to investors	120.00%

XML

Noncontrolling Interests on the Company's Consolidated Financial Statements - Additional Information (Details)	1 Months Ended	12 Months Ended
	Jan. 31, 2012 $ / shares shares	Dec. 31, 2018 USD ($) shares $ / shares	Dec. 31, 2017 USD ($) unit $ / shares shares	Dec. 31, 2016 USD ($) shares	Mar. 31, 2016 shares	Aug. 31, 2015 shares	Jul. 31, 2015 shares	Jun. 30, 2015 shares	Feb. 28, 2015 shares	Aug. 31, 2014 shares
Organization
Basic weighted average common shares outstanding (in shares)		86,753,000	98,571,000	100,185,000
Rollforward analysis of the activity relating to the noncontrolling interests in the operating partnership
Balance at beginning of period | $		$ 461,954,000
Distributions | $		(8,364,000)	$ (52,446,000)	$ (15,419,000)
Net income | $		12,216,000	3,995,000	10,136,000
Accumulated other comprehensive income allocation | $		(66,000)	(94,000)	$ 1,299,000
Balance at end of period | $		$ 387,805,000	$ 461,954,000
Number of company common stock issued on conversion of Series B preferred units		6.71348
Diluted weighted average common stock outstanding (shares)		91,530,000	103,403,000	104,881,000
SL Green Operating Partnership
Rollforward analysis of the activity relating to the noncontrolling interests in the operating partnership
Balance at beginning of period | $		$ 461,954,000	$ 473,882,000
Distributions | $		(15,000,000)	(14,266,000)
Issuance of common units | $		23,655,000	25,723,000
Redemption of common units | $		(60,718,000)	(21,574,000)
Net income | $		12,216,000	3,995,000
Accumulated other comprehensive income allocation | $		(66,000)	(94,000)
Fair value adjustment | $		(34,236,000)	(5,712,000)
Balance at end of period | $		$ 387,805,000	$ 461,954,000	$ 473,882,000
SL Green Operating Partnership | Series G Preferred Units
Rollforward analysis of the activity relating to the noncontrolling interests in the operating partnership
Number of preferred units issued (in shares)	1,902,000
Dividend rate preferred units (as a percent)	4.50%
Liquidation preference of preferred units (in dollars per share) | $ / shares	$ 25.00
Annual dividends on preferred units (in dollars per share) | $ / shares		$ 1.125
Operating partnership common stock value use for conversion of preferred units (in dollars per share) | $ / shares		$ 88.50
Number of company common stock issue on redemption of operation partnership common units		1
SL Green Operating Partnership | Series F Preferred Units
Rollforward analysis of the activity relating to the noncontrolling interests in the operating partnership
Number of preferred units issued (in shares)		60
Mandatory liquidation preference (in dollars per share) | $		$ 1,000.00
SL Green Operating Partnership | Series K Preferred Units
Rollforward analysis of the activity relating to the noncontrolling interests in the operating partnership
Number of preferred units issued (in shares)										563,954
Dividend rate preferred units (as a percent)		3.50%
Liquidation preference of preferred units (in dollars per share) | $ / shares		$ 25.00
Annual dividends on preferred units (in dollars per share) | $ / shares		0.875
Operating partnership common stock value use for conversion of preferred units (in dollars per share) | $ / shares		$ 134.67
Preferred Units, shares authorized		700,000
SL Green Operating Partnership | Series L Preferred Units
Rollforward analysis of the activity relating to the noncontrolling interests in the operating partnership
Number of preferred units issued (in shares)										378,634
Dividend rate preferred units (as a percent)		4.00%
Liquidation preference of preferred units (in dollars per share) | $ / shares		$ 25.00
Annual dividends on preferred units (in dollars per share) | $ / shares		$ 1.00
Preferred Units, shares authorized		500,000
SL Green Operating Partnership | Series M Preferred Units
Rollforward analysis of the activity relating to the noncontrolling interests in the operating partnership
Number of preferred units issued (in shares)									1,600,000
Dividend rate preferred units (as a percent)		3.75%
Liquidation preference of preferred units (in dollars per share) | $ / shares		$ 25.00
Annual dividends on preferred units (in dollars per share) | $ / shares		$ 0.9375
Preferred Units, shares authorized		1,600,000
SL Green Operating Partnership | Series N Preferred Units
Rollforward analysis of the activity relating to the noncontrolling interests in the operating partnership
Number of preferred units issued (in shares)								552,303
Dividend rate preferred units (as a percent)		3.00%
Liquidation preference of preferred units (in dollars per share) | $ / shares		$ 25.00
Annual dividends on preferred units (in dollars per share) | $ / shares		$ 0.75
Preferred Units, shares authorized		552,303
SL Green Operating Partnership | Series O Preferred Units
Rollforward analysis of the activity relating to the noncontrolling interests in the operating partnership
Dividend rate preferred units (as a percent)		6.25%
Preferred Units, shares authorized		1
SL Green Operating Partnership | Series P Preferred Units
Organization
Shares of common stock reserved for issuance upon redemption of units of limited partnership interest in operating partnership (shares)		200,000
Rollforward analysis of the activity relating to the noncontrolling interests in the operating partnership
Number of preferred units issued (in shares)							200,000
Dividend rate preferred units (as a percent)		4.00%
Liquidation preference of preferred units (in dollars per share) | $ / shares		$ 25.00
Annual dividends on preferred units (in dollars per share) | $ / shares		$ 1.00
SL Green Operating Partnership | Series Q Preferred Units
Organization
Shares of common stock reserved for issuance upon redemption of units of limited partnership interest in operating partnership (shares)		268,000
Rollforward analysis of the activity relating to the noncontrolling interests in the operating partnership
Number of preferred units issued (in shares)							268,000
Dividend rate preferred units (as a percent)		3.50%
Liquidation preference of preferred units (in dollars per share) | $ / shares		$ 25.00
Annual dividends on preferred units (in dollars per share) | $ / shares		0.875
Operating partnership common stock value use for conversion of preferred units (in dollars per share) | $ / shares		$ 148.95
SL Green Operating Partnership | Series R Preferred Units
Organization
Shares of common stock reserved for issuance upon redemption of units of limited partnership interest in operating partnership (shares)		400,000
Rollforward analysis of the activity relating to the noncontrolling interests in the operating partnership
Number of preferred units issued (in shares)						400,000
Dividend rate preferred units (as a percent)		3.50%
Liquidation preference of preferred units (in dollars per share) | $ / shares		$ 25.00
Annual dividends on preferred units (in dollars per share) | $ / shares		0.875
Operating partnership common stock value use for conversion of preferred units (in dollars per share) | $ / shares		$ 154.89
SL Green Operating Partnership | Series S Preferred Units
Organization
Shares of common stock reserved for issuance upon redemption of units of limited partnership interest in operating partnership (shares)		1,077,280
Rollforward analysis of the activity relating to the noncontrolling interests in the operating partnership
Number of preferred units issued (in shares)						1,077,280
Dividend rate preferred units (as a percent)		4.00%
Liquidation preference of preferred units (in dollars per share) | $ / shares		$ 25.00
Annual dividends on preferred units (in dollars per share) | $ / shares		$ 1.00
SL Green Operating Partnership | Series T Preferred Stock
Organization
Shares of common stock reserved for issuance upon redemption of units of limited partnership interest in operating partnership (shares)		230,000
Rollforward analysis of the activity relating to the noncontrolling interests in the operating partnership
Number of preferred units issued (in shares)					230,000
Dividend rate preferred units (as a percent)		2.75%
Liquidation preference of preferred units (in dollars per share) | $ / shares		$ 25.00
Annual dividends on preferred units (in dollars per share) | $ / shares		0.6875
Operating partnership common stock value use for conversion of preferred units (in dollars per share) | $ / shares		$ 119.02
SL Green Operating Partnership | Series U Preferred Stock
Organization
Shares of common stock reserved for issuance upon redemption of units of limited partnership interest in operating partnership (shares)		680,000
Rollforward analysis of the activity relating to the noncontrolling interests in the operating partnership
Number of preferred units issued (in shares)					680,000
Dividend rate preferred units (as a percent)		4.50%
Liquidation preference of preferred units (in dollars per share) | $ / shares		$ 25.00
Annual dividends on preferred units (in dollars per share) | $ / shares		$ 1.125
SL Green Operating Partnership | Series A Preferred Units
Organization
Shares of common stock reserved for issuance upon redemption of units of limited partnership interest in operating partnership (shares)		109,161
Rollforward analysis of the activity relating to the noncontrolling interests in the operating partnership
Number of preferred units issued (in shares)						109,161
Dividend rate preferred units (as a percent)		3.50%
Liquidation preference of preferred units (in dollars per share) | $ / shares		$ 1,000.00
Annual dividends on preferred units (in dollars per share) | $ / shares		$ 35.00
Number of company common stock issue on redemption of operation partnership common units		1
SL Green Operating Partnership | Series B Preferred Units
Rollforward analysis of the activity relating to the noncontrolling interests in the operating partnership
Number of preferred units issued (in shares)		0
SL Green Operating Partnership
Organization
Basic weighted average common shares outstanding (in shares)		91,315,000	103,127,000	104,508,000
Noncontrolling interest in the operating partnership (as a percent)		4.70%	4.58%
Number of units of operating partnership owned by the noncontrolling interest unit holders (shares)		4,130,579	4,452,979
Shares of common stock reserved for issuance upon redemption of units of limited partnership interest in operating partnership (shares)		4,130,579.000
Rollforward analysis of the activity relating to the noncontrolling interests in the operating partnership
Distributions | $		$ (8,364,000)	$ (52,446,000)	$ (15,419,000)
Accumulated other comprehensive income allocation | $		$ (66,000)	$ (94,000)	$ 1,299,000
Liquidation preference of preferred units (in dollars per share) | $ / shares		$ 25.00	$ 25.00
Stock-based compensation plans (shares)		215,000	276,000	373,000
Diluted weighted average common stock outstanding (shares)		91,530,000	103,403,000	104,881,000
Minimum | SL Green Operating Partnership | Series U Preferred Stock
Rollforward analysis of the activity relating to the noncontrolling interests in the operating partnership
Annual dividends on preferred units (in dollars per share) | $ / shares		$ 0.75

XML

Noncontrolling Interests on the Company's Consolidated Financial Statements - Preferred Unit Activity (Details) - SL Green Operating Partnership - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Rollforward Analysis of Preferred Unit Activity
Issuance of preferred units	$ 23,655	$ 25,723
Redemption of preferred units	(60,718)	(21,574)
Preferred Units
Rollforward Analysis of Preferred Unit Activity
Balance at beginning of period	301,735	302,010
Issuance of preferred units	0	0
Redemption of preferred units	(1,308)	(275)
Balance at end of period	$ 300,427	$ 301,735

XML

Stockholders' Equity of the Company - Additional Information (Details) - $ / shares	Dec. 31, 2018	Dec. 31, 2017
Stockholders' Equity Note [Abstract]
Authorized capital stock (shares)	260,000,000
Authorized shares, par value (in dollars per share)	$ 0.01
Common stock, shares authorized (in shares)	160,000,000	160,000,000
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Excess stock, shares authorized (shares)	75,000,000
Excess stock, par value (in dollars per share)	$ 0.01
Preferred stock, shares authorized (shares)	25,000,000
Preferred stock, par (in dollars per share)	$ 0.01	$ 0.01
Excess shares issued (shares)	0

XML

Stockholders' Equity of the Company - Stock Repurchase Program (Details)	3 Months Ended				12 Months Ended
	Dec. 31, 2018 USD ($) $ / shares shares	Sep. 30, 2018 $ / shares shares	Jun. 30, 2018 USD ($) $ / shares shares	Mar. 31, 2018 $ / shares shares	Dec. 31, 2018 USD ($) increase	Dec. 31, 2017 USD ($) $ / shares shares	Aug. 31, 2016 USD ($)
Class of Stock [Line Items]
Number of shares purchased (in shares) | shares	2,358,484	252,947	3,479,552	3,653,928		8,342,411
Maximum approximate dollar value of shares that may yet be purchased under the plan | $ / shares	$ 93.04	$ 99.75	$ 97.22	$ 97.07		$ 101.64
2016 Repurchase Program
Class of Stock [Line Items]
Stock repurchase program, authorized amount | $	$ 500,000,000		$ 500,000,000		$ 500,000,000	$ 500,000,000	$ 1,000,000,000.0
Number of increases to share repurchase program | increase					3
Stock repurchase program, authorized amount, total | $	$ 2,500,000,000.0				$ 2,500,000,000.0
Number of shares purchased (in shares) | shares	18,087,322	15,728,838	15,475,891	11,996,339		8,342,411

XML

Stockholders' Equity of the Company - At-the-Market Equity Offering Program and Perpetual Preferred Stock (Details) - USD ($)	1 Months Ended	12 Months Ended
	Aug. 31, 2012	Dec. 31, 2018	Dec. 31, 2017	Mar. 31, 2015
Stockholders' Equity
Preferred stock, shares outstanding (in shares)		9,200,000	9,200,000
Perpetual Preferred stock, liquidation preference (in dollars per share)		$ 25.00	$ 25.00
2015 ATM Equity Offering Program
Stockholders' Equity
Aggregate value of the shares of common stock to be sold				$ 300,000,000.0
Series I Preferred Stock
Stockholders' Equity
Preferred stock, shares outstanding (in shares)	9,200,000	9,200,000
Dividend rate preferred units (as a percent)	6.50%	6.50%
Perpetual Preferred stock, liquidation preference (in dollars per share)		$ 25.00
Perpetual Preferred stock, annual dividends per share (in dollars per share)		$ 1.625
Contributions of net proceeds from sale of preferred stock	$ 221,900,000

XML

Stockholders' Equity of the Company - Schedule of Common Stock Issued and Proceeds Received Dividend Reinvestments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Feb. 28, 2015
Stockholders' Equity
Common stock, shares authorized (in shares)	160,000,000	160,000,000
Dividend Reinvestment and Stock Purchase Plan (DRIP)
Stockholders' Equity
Common stock, shares authorized (in shares)				3,500,000
Issuance of common stock (in shares)	1,399	2,141	2,687
Dividend reinvestments/stock purchases under the DRSPP	$ 136	$ 223	$ 277

XML

Stockholders' Equity of the Company - Earnings per Share (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Basic Earnings:
Income attributable to SL Green common stockholders	$ (61,219)	$ 88,209	$ 103,556	$ 101,766	$ 27,982	$ 38,869	$ 8,222	$ 11,351	$ 232,312	$ 86,424	$ 234,946
Less: distributed earnings allocated to participating securities									(552)	(471)	(634)
Net income attributable to SL Green common stockholders (numerator for basic earnings per share)									231,760	85,953	234,312
Effect of Dilutive Securities:
Add back: undistributed earnings allocated to participating securities									552	471	634
Add back: Effect of dilutive securities (redemption of units to common shares)									12,216	3,995	10,136
Diluted Earnings:
Income attributable to SL Green common stockholders (numerator for diluted earnings per share)									$ 244,528	$ 90,419	$ 245,082
Basic Shares:
Weighted average common shares outstanding (shares)									86,753,000	98,571,000	100,185,000
Effect of Dilutive Securities:
Redemption of units to common shares (shares)									4,562,000	4,556,000	4,323,000
Stock-based compensation plans (shares)									215,000	276,000	373,000
Diluted weighted average common stock outstanding (shares)									91,530,000	103,403,000	104,881,000
Common stock shares excluded from the diluted shares outstanding (shares)									1,138,647	774,782	263,991

XML

Partners' Capital of the Operating Partnership - Additional Information (Details)	12 Months Ended
	Dec. 31, 2018 shares	Dec. 31, 2017 unit shares	Dec. 31, 2016 shares	Dec. 31, 2015 shares
Common Stock
Stockholders' Equity
Units outstanding (units)	83,684,000	92,803,000	100,562,000	99,976,000
SL Green Operating Partnership
Stockholders' Equity
Noncontrolling interest in the operating partnership (as a percent)	4.70%	4.58%
Number of units of operating partnership owned by the noncontrolling interest unit holders (units)	4,130,579	4,452,979
SL Green Operating Partnership | Series I Preferred Units
Stockholders' Equity
Units outstanding (units)	9,200,000
Common units redemption, period of restriction	1 year
Conversion of stock, shares issued (in shares)	1
SL Green Operating Partnership | Common Stock
Stockholders' Equity
Units outstanding (units)	83,683,847

XML

Partners' Capital of the Operating Partnership - EPS (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Numerator
Less: distributed earnings allocated to participating securities									$ (552)	$ (471)	$ (634)
Net Income (Loss) Available To Common Stockholders, After Distributed And Undistributed Earnings Allocation, Basic									231,760	85,953	234,312
Add back: undistributed earnings allocated to participating securities									$ (552)	$ (471)	$ (634)
Denominator
Weighted average common shares outstanding (shares)									86,753,000	98,571,000	100,185,000
Diluted weighted average common stock outstanding (shares)									91,530,000	103,403,000	104,881,000
Common stock shares excluded from the diluted shares outstanding (shares)									1,138,647	774,782	263,991
SL Green Operating Partnership
Numerator
Net income attributable to SLGOP common unitholders	$ (64,658)	$ 93,006	$ 109,142	$ 107,038	$ 29,270	$ 40,681	$ 8,641	$ 11,827	$ 244,528	$ 90,419	$ 245,082
Net Income (Loss) Available To Common Stockholders, After Distributed And Undistributed Earnings Allocation, Basic									243,976	89,948	244,448
Add back: undistributed earnings allocated to participating securities									$ 552	$ 471	$ 634
Denominator
Weighted average common shares outstanding (shares)									91,315,000	103,127,000	104,508,000
Stock-based compensation plans (shares)									215,000	276,000	373,000
Diluted weighted average common stock outstanding (shares)									91,530,000	103,403,000	104,881,000
Common stock shares excluded from the diluted shares outstanding (shares)									1,138,647	774,782	263,991

XML

Share-based Compensation - Additional Information (Details)			1 Months Ended	12 Months Ended
	Aug. 31, 2018	Aug. 31, 2017	Aug. 31, 2014 shares	Dec. 31, 2018 USD ($) unit / shares fungible_unit $ / shares shares	Dec. 31, 2017 USD ($) shares	Dec. 31, 2016 USD ($) shares	Dec. 31, 2015 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Capitalized to assets associated with compensation expense related to our long-term compensation plans, restricted stock and stock options				$ 6,300,000	$ 7,200,000	$ 6,000,000
Stock options, stock appreciation rights and other awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected life of option (in years)				5 years
All other awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fungible units per share (in fungible units per share) | unit / shares				1.0
Expected life of option (in years)				10 years
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected life of option (in years)				3 years 6 months 1 day	4 years 4 months 24 days	3 years 8 months 12 days
Period of commencement of option vesting, from date of grant (in years)				1 year
Exercise price of options granted, low end of the range (in dollars per share) | $ / shares				$ 20.67
Exercise price of options granted, high end of the range (in dollars per share) | $ / shares				$ 137.18
Remaining weighted average contractual life of the options outstanding (in years)				3 years 6 months 12 days
Remaining weighted average contractual life of the options exercisable (in years)				3 years 8 months 24 days
Total unrecognized compensation cost related to unvested stock awards				$ 2,600,000
Weighted average period for recognition of compensation cost related to unvested stock awards (in years)				1 year 1 day
Weighted average fair value of options granted during the period				$ 84,068	$ 3,816,652	$ 8,363,036
Stock options | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award expiration period (in years)				5 years
Options vesting period (in years)				1 year
Stock options | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award expiration period (in years)				10 years
Options vesting period (in years)				5 years
Restricted Stock Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Annual award vesting rate, low end of range (as a percent)				15.00%
Annual award vesting rate, high end of range (as a percent)				35.00%
Class O LTIP Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Preferred unit distributions as a percentage of common unit distributions				10.00%
Restricted Stock Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense				$ 12,757,704	9,809,749	7,153,966
Total unrecognized compensation cost related to unvested stock awards				$ 22,700,000
Weighted average period for recognition of compensation cost related to unvested stock awards (in years)				2 years 3 months 12 days
Fair value of restricted stock vested during the period				$ 9,800,000	9,400,000	7,600,000
Weighted average fair value of options granted during the period				$ 13,440,503	$ 9,905,986	$ 10,650,077
Awards granted (in shares) | shares				162,900	96,185	98,800
Awards outstanding (in shares) | shares				3,452,016	3,298,216	3,202,031	3,137,881
LTIP units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average period for recognition of compensation cost related to unvested stock awards (in years)				1 year 3 months 24 days
Weighted average fair value of options granted during the period				$ 22,000,000	$ 20,500,000
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total unrecognized compensation cost related to unvested stock awards				2,900,000
Share-based Compensation				$ 24,400,000	26,100,000	$ 26,500,000
Employee Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares available for issuance (shares) | shares				500,000
Shares of common stock available for issuance (shares)				85.00%
Duration of each offering period starting the first day of each calendar quarter (in months)				3 months
Shares of common stock issued (shares) | shares				116,368
Fourth Amended and Restated 2003 Stock Option and Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum fungible units that may be granted (in shares) | fungible_unit				27,030,000
Fungible units per share (in fungible units per share) | unit / shares				3.74
Shares that may be issued if equal to fungible units (shares) (less than) | shares				27,030,000
Fungible units | fungible_unit				6,700,000
Stock options, stock appreciation rights and other awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fungible units per share (in fungible units per share) | unit / shares				0.73
Third Amendment and Restated 2005 Stock Option and Incentive Plan | Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense				$ 5,400,000	7,800,000	8,900,000
2014 Outperformance Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense				0	$ 13,600,000	$ 8,400,000
Capitalized to assets associated with compensation expense related to our long-term compensation plans, restricted stock and stock options				27,900,000
Maximum award to be earned, if performance reaches maximum threshold, first performance period			0.333
Maximum award to be earned, if performance reaches maximum threshold, first performance period			0.667
Award period (in years)			3 years
Awards granted (in shares) | shares			610,000
2014 Outperformance Plan | Vesting on August 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of units vested		50.00%
2014 Outperformance Plan | Vesting on August 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of units vested	50.00%
Deferred Stock Compensation Plan for Directors
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense				$ 2,400,000
Maximum percentage of the annual retainer fee, chairman fees and meeting fees that may be deferred by non-employee directors (percent)				100.00%
Awards granted (in shares) | shares				13,638
Shares issued (in shares) | shares				9,459
Awards outstanding (in shares) | shares				113,492

XML

Share-based Compensation - Activity (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Employee Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares held in employee trust (in shares)	116,368
Stock options
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Dividend yield (as a percent)	2.85%	2.51%	2.37%
Expected life of option (in years)	3 years 6 months 1 day	4 years 4 months 24 days	3 years 8 months 12 days
Risk-free interest rate (as a percent)	2.48%	1.73%	1.57%
Expected stock price volatility (as a percent)	22.00%	28.10%	26.76%
Options Outstanding
Balance at beginning of year (in shares)	1,548,719	1,737,213	1,595,007
Granted (in shares)	6,000	174,000	445,100
Exercised (in shares)	(316,302)	(292,193)	(192,875)
Lapsed or cancelled (in shares)	(101,400)	(70,301)	(110,019)
Balance at end of period (in shares)	1,137,017	1,548,719	1,737,213
Options exercisable at end of period (in shares)	783,035	800,902	748,617
Weighted average fair value of options granted during the period	$ 84,068	$ 3,816,652	$ 8,363,036
Weighted Average Exercise Price
Balance at beginning of year (in dollars per share)	$ 101.48	$ 98.44	$ 95.52
Granted (in dollars per share)	97.91	105.66	105.86
Exercised (in dollars per share)	90.22	81.07	76.90
Lapsed or cancelled (in dollars per share)	113.22	121.68	123.86
Balance at end of period (in dollars per share)	135.54	101.48	98.44
Options exercisable at end of period (in dollars per share)	$ 101.28	$ 94.33	$ 87.72
Restricted Stock Awards
Options Outstanding
Weighted average fair value of options granted during the period	$ 13,440,503	$ 9,905,986	$ 10,650,077
Summary of restricted stock
Balance at beginning of year (in shares)	3,298,216	3,202,031	3,137,881
Granted (in shares)	162,900	96,185	98,800
Cancelled (in shares)	(9,100)	0	(34,650)
Balance at end of period (in shares)	3,452,016	3,298,216	3,202,031
Vested during the period (in shares)	92,114	95,736	83,822
Compensation expense recorded	$ 12,757,704	$ 9,809,749	$ 7,153,966

XML

Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Accumulated Other Comprehensive Income (Loss) of the Company [Roll Forward]
Beginning Balance	$ 6,589,454	$ 7,750,911	$ 7,719,317
Other comprehensive (loss) income before reclassifications	(2,304)	(2,733)	18,211
Amounts reclassified from accumulated other comprehensive income	(1,192)	(800)	12,675
Ending Balance	5,947,855	6,589,454	7,750,911
Deferred net losses from terminated hedges	1,300	3,200
Net unrealized (loss) gain on derivative instruments
Accumulated Other Comprehensive Income (Loss) of the Company [Roll Forward]
Beginning Balance	12,542	12,596	(10,160)
Other comprehensive (loss) income before reclassifications	(2,252)	(1,618)	13,534
Amounts reclassified from accumulated other comprehensive income	(574)	1,564	9,222
Ending Balance	9,716	12,542	12,596
Net unrealized gain on marketable securities
Accumulated Other Comprehensive Income (Loss) of the Company [Roll Forward]
Beginning Balance	1,042	5,520	2,003
Other comprehensive (loss) income before reclassifications	51	(1,348)	3,517
Amounts reclassified from accumulated other comprehensive income	0	(3,130)	0
Ending Balance	1,093	1,042	5,520
Accumulated Other Comprehensive Income
Accumulated Other Comprehensive Income (Loss) of the Company [Roll Forward]
Beginning Balance	18,604	22,137	(8,749)
Ending Balance	15,108	18,604	22,137
Joint venture | Net unrealized (loss) gain on derivative instruments
Accumulated Other Comprehensive Income (Loss) of the Company [Roll Forward]
Beginning Balance	5,020	4,021	(592)
Other comprehensive (loss) income before reclassifications	(103)	233	1,160
Amounts reclassified from accumulated other comprehensive income	(618)	766	3,453
Ending Balance	$ 4,299	$ 5,020	$ 4,021

XML

Fair Value Measurements (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended				12 Months Ended
	May 31, 2018	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Fair Value of Financial Instruments
Marketable securities		$ 28,638				$ 28,638	$ 28,579
Interest rate cap and swap agreements (included in other assets)		18,676				18,676	16,692
Interest rate cap and swap agreements (included in accrued interest payable and other liabilities)		7,663				7,663
Asset impairment loss						221,900
Purchase price and other fair value adjustment		0	$ (3,057)	$ 11,149	$ 49,293	57,385	0	$ 0
Debt and preferred equity investments		2,099,393				2,099,393	2,114,041
Carrying Value
Fair Value of Financial Instruments
Fixed rate debt		3,543,476				3,543,476	4,305,165
Variable rate debt		2,048,442				2,048,442	1,605,431
Total		5,591,918				5,591,918	5,910,596
Fair Value
Fair Value of Financial Instruments
Marketable securities		28,638				28,638	28,579
Total		5,288,093				5,288,093	6,034,090
Estimated fair value of debt and preferred equity investments, low end of range		2,100,000				2,100,000	2,100,000
Estimated fair value of debt and preferred equity investments, high end of range		2,300,000				2,300,000	2,300,000
Level 1
Fair Value of Financial Instruments
Interest rate cap and swap agreements (included in other assets)		0				0	0
Interest rate cap and swap agreements (included in accrued interest payable and other liabilities)		0				0
Level 2
Fair Value of Financial Instruments
Interest rate cap and swap agreements (included in other assets)		18,676				18,676	16,692
Interest rate cap and swap agreements (included in accrued interest payable and other liabilities)		7,663				7,663
Level 3
Fair Value of Financial Instruments
Marketable securities		0				0	0
Interest rate cap and swap agreements (included in other assets)		0				0	0
Interest rate cap and swap agreements (included in accrued interest payable and other liabilities)		0				0
Level 3 | Carrying Value
Fair Value of Financial Instruments
Debt and preferred equity investments							2,114,041
Level 3 | Fair Value
Fair Value of Financial Instruments
Fixed rate debt		3,230,127				3,230,127	4,421,866
Variable rate debt		2,057,966				2,057,966	1,612,224
Equity marketable securities | Level 1
Fair Value of Financial Instruments
Marketable securities		0				0	0
Mortgage-backed securities
Fair Value of Financial Instruments
Marketable securities		28,638				28,638	28,579
Mortgage-backed securities | Level 2
Fair Value of Financial Instruments
Marketable securities		28,638				28,638	28,579
Total fixed rate | Mortgage and Jr Mortgage Loan with an Initial Maturity Date of April 2017
Fair Value of Financial Instruments
Notes receivable	$ 250,500
Interest receivable	7,700
2 Herald Square
Fair Value of Financial Instruments
Purchase price fair value adjustment	$ 8,100
Joint venture
Fair Value of Financial Instruments
Debt and preferred equity investments		$ 44,357				44,357	$ 202,539
Joint venture | 919 Third Avenue | 919 Third Avenue
Fair Value of Financial Instruments
Purchase price and other fair value adjustment						$ 49,300

XML

Financial Instruments: Derivatives and Hedging (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Financial Instruments: Derivatives and Hedging
Fair Value	$ 18,676	$ 16,692
Gain (loss) from changes in fair value	(200)	(500)	$ 500
Fair value of derivatives in a net liability position	7,700
Aggregate termination value	7,700
Amount of (Loss) Gain Recognized in Other Comprehensive Loss (Effective Portion)	(4,072)	(2,482)	16,628
Amount of Loss Reclassified from Accumulated Other Comprehensive Loss into Income (Effective Portion)	1,335	2,856	11,502
Amount of (Loss) Gain Recognized into Income (Ineffective Portion)	(930)	60	757
Interest Rate Swap Expiring in July 2023
Financial Instruments: Derivatives and Hedging
Notional Value	$ 200,000
Strike Rate	1.131%
Fair Value	$ 11,148
Interest Rate Swap Expiring in July 2023, 2
Financial Instruments: Derivatives and Hedging
Notional Value	$ 100,000
Strike Rate	1.161%
Fair Value	$ 5,447
Interest Rate Cap Expiring September 2019
Financial Instruments: Derivatives and Hedging
Notional Value	$ 137,500
Strike Rate	4.00%
Fair Value	$ 0
Interest Rate Swap Expiring November 2020
Financial Instruments: Derivatives and Hedging
Notional Value	$ 100,000
Strike Rate	1.928%
Fair Value	$ 1,045
Interest Rate Swap Expiring November 2020, 2
Financial Instruments: Derivatives and Hedging
Notional Value	$ 100,000
Strike Rate	1.934%
Fair Value	$ 1,035
Interest Rate Swap Expiring January 2024
Financial Instruments: Derivatives and Hedging
Notional Value	$ 150,000
Strike Rate	2.6955%
Fair Value	$ (1,858)
Interest Rate Swap Expiring January 2026
Financial Instruments: Derivatives and Hedging
Notional Value	$ 150,000
Strike Rate	2.721%
Fair Value	$ (2,450)
Interest Rate Swap Expiring January 2026, 2
Financial Instruments: Derivatives and Hedging
Notional Value	$ 200,000
Strike Rate	2.74%
Fair Value	$ (3,354)
Interest Rate Swap
Financial Instruments: Derivatives and Hedging
Fair Value	11,013
Amount of (Loss) Gain Recognized in Other Comprehensive Loss (Effective Portion)	(2,284)	(2,282)	14,616
Amount of Loss Reclassified from Accumulated Other Comprehensive Loss into Income (Effective Portion)	609	1,821	9,521
Amount of (Loss) Gain Recognized into Income (Ineffective Portion)	(559)	5	(28)
Interest Expense
Financial Instruments: Derivatives and Hedging
Estimated current balance held in accumulated other comprehensive loss to be reclassified into earnings within the next 12 months	2,500
Income Loss From Equity Method Investments
Financial Instruments: Derivatives and Hedging
Estimated current balance held in accumulated other comprehensive loss to be reclassified into earnings within the next 12 months	600
Joint venture
Financial Instruments: Derivatives and Hedging
Amount of (Loss) Gain Recognized in Other Comprehensive Loss (Effective Portion)	(1,788)	(200)	2,012
Amount of Loss Reclassified from Accumulated Other Comprehensive Loss into Income (Effective Portion)	726	1,035	1,981
Amount of (Loss) Gain Recognized into Income (Ineffective Portion)	$ (371)	$ 55	$ 785

XML

Rental Income (Details) $ in Thousands	Dec. 31, 2018 USD ($)
Consolidated properties
Operating Leased Assets [Line Items]
2019	$ 830,336
2020	765,610
2021	625,956
2022	562,250
2023	500,499
Thereafter	3,272,014
Total minimum lease payments	6,556,665
Unconsolidated properties
Operating Leased Assets [Line Items]
2019	348,060
2020	375,228
2021	380,886
2022	348,222
2023	333,501
Thereafter	2,098,995
Total minimum lease payments	$ 3,884,892

XML

Benefit Plans (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Jun. 30, 2018	Dec. 31, 2017	Jun. 30, 2017	Dec. 31, 2016	Jun. 30, 2016
Multiemployer Plans [Line Items]
Plan contributions	$ 13,433,000		$ 16,745,000		$ 17,092,000
401 (K) Plan
Employee contribution limit per calendar year	15.00%
Employer matching contribution, percent of match	100.00%		50.00%		50.00%
Percentage of eligible compensation matched by employer	4.00%		6.00%		6.00%
Matching contribution	$ 1,075,267		$ 1,011,830		$ 906,875
Health Plan
Multiemployer Plans [Line Items]
Plan contributions	$ 9,310,000		11,426,000		11,530,000
Multiemployer plan, contributions by employer		$ 1,400,000,000		$ 1,300,000,000		$ 1,200,000,000
Percentage of contributions required for multiple collective-bargaining arrangements	5.00%
Other plans
Multiemployer Plans [Line Items]
Plan contributions	$ 1,106,000		1,463,000		1,583,000
Pension Plan
Multiemployer Plans [Line Items]
Multiemployer plans, surcharge	No
Plan contributions	$ 3,017,000	$ 272,300,000	$ 3,856,000	$ 257,800,000	$ 3,979,000	$ 249,500,000
Multiemployer plans, contributions by employer, percent	5.00%

XML

Commitments and Contingencies (Details)	12 Months Ended
	Dec. 31, 2018 USD ($) option	Dec. 31, 2017 USD ($)
Other Commitments [Line Items]
Employment agreements with certain executives, minimum cash-based compensation for next fiscal year	$ 3,300,000
Capital lease obligations	$ 43,616,000	$ 42,843,000
Initial term of non cancellable operating leases, minimum (in years)	1 year
Capital lease
2019	$ 2,411,000
2020	2,620,000
2021	2,794,000
2022	2,794,000
2023	2,794,000
Thereafter	817,100,000
Total minimum lease payments	830,513,000
Amount representing interest	(786,897,000)
Capital lease obligations	43,616,000
Non-cancellable operating leases (1)
2019	31,066,000
2020	31,436,000
2021	31,628,000
2022	29,472,000
2023	27,166,000
Thereafter	676,090,000
Total minimum lease payments	826,858,000
Minimum sublease rentals to be received in the future	$ 1,700,000,000
30 East 40th Street
Other Commitments [Line Items]
Land as percentage of fair market value of property under lease	63.60%
Capital lease obligations	$ 20,000,000
Non-cancellable operating leases (1)
Total minimum lease payments	$ 76,000,000
420 Lexington Avenue
Other Commitments [Line Items]
Land as percentage of fair market value of property under lease	6.00%
Annual ground lease payments through December 2019	$ 10,900,000
Annual ground lease payments, year seven to year sixteen	11,200,000
Annual ground lease payments due thereafter	$ 12,300,000
Number of renewal options available (extension option) | option	2
Term of first renewal option (in years)	30 years
1080 Amsterdam Avenue
Other Commitments [Line Items]
Land as percentage of fair market value of property under lease	40.00%
Non-cancellable operating leases (1)
Total minimum lease payments	$ 41,600,000
711 Third Avenue
Other Commitments [Line Items]
Number of renewal options available (extension option) | option	5
Term of first renewal option (in years)	10 years
Percentage of the fee not owned by the entity (percent)	50.00%
711 Third Avenue | Through July 2016
Other Commitments [Line Items]
Required annual ground lease payments	$ 5,250,000
711 Third Avenue | After July 2016
Other Commitments [Line Items]
Required annual ground lease payments	5,500,000
711 Third Avenue | After July 2021
Other Commitments [Line Items]
Required annual ground lease payments	$ 5,500,000
Annual ground lease payments, percent of fair value of land	7.75%
461 Fifth Avenue
Other Commitments [Line Items]
Number of renewal options available (extension option) | option	2
Term of first renewal option (in years)	21 years
Required annual ground lease payments	$ 2,100,000
Term of third renewal option	15 years
625 Madison Avenue
Other Commitments [Line Items]
Number of renewal options available (extension option) | option	2
Term of first renewal option (in years)	32 years
Required annual ground lease payments	$ 4,600,000
1185 Avenue of the Americas
Other Commitments [Line Items]
Required annual ground lease payments	6,900,000
1055 Washington Boulevard
Other Commitments [Line Items]
Required annual ground lease payments	600,000
Belmont
Other Commitments [Line Items]
Loss reserves	4,000,000	$ 5,500,000
Ticonderoga
Other Commitments [Line Items]
Loss reserves	$ 0

XML

Segment Information - Additional Information (Details) $ in Thousands		3 Months Ended								12 Months Ended
		Dec. 31, 2018 USD ($)	Sep. 30, 2018 USD ($)	Jun. 30, 2018 USD ($)	Mar. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Sep. 30, 2017 USD ($)	Jun. 30, 2017 USD ($)	Mar. 31, 2017 USD ($)	Dec. 31, 2018 USD ($) segment	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)
Segment information
Number of reportable segments (segment) | segment										2
Total revenues		$ 317,036	$ 307,545	$ 301,116	$ 301,695	$ 361,342	$ 374,600	$ 398,150	$ 377,381	$ 1,227,392	$ 1,511,473	$ 1,863,981
Net Income										270,856	101,069	278,911
Total assets	[1]	12,751,358				13,982,904				12,751,358	13,982,904
Marketing, general and administrative										92,631	100,498	99,759
Operating Segments | Real Estate Segment
Segment information
Total revenues										1,025,900	1,317,602	1,650,973
Net Income										129,253	(69,294)	74,655
Total assets		10,481,594				11,598,438				10,481,594	11,598,438
Operating Segments | Debt and Preferred Equity Segment
Segment information
Total revenues										201,492	193,871	213,008
Net Income										141,603	170,363	$ 204,256
Total assets		$ 2,269,764				$ 2,384,466				$ 2,269,764	$ 2,384,466

[1] The Company's consolidated balance sheets include assets and liabilities of consolidated variable interest entities ("VIEs"). See Note 2. The consolidated balance sheets include the following amounts related to our consolidated VIEs, excluding the Operating Partnership: $110.0 million and $398.0 million of land, $0.3 billion and $1.4 billion of building and improvements, $2.0 million and $2.0 million of building and leasehold improvements, $47.4 million and $47.4 million of properties under capital lease, $42.2 million and $330.9 million of accumulated depreciation, $721.3 million and $221.0 million of other assets included in other line items, $140.8 million and $628.9 million of real estate debt, net, $0.4 million and $2.5 million of accrued interest payable, $43.6 million and $42.8 million of capital lease obligations, and $18.4 million and $56.8 million of other liabilities included in other line items as of December 31, 2018 and December 31, 2017, respectively.

XML

Quarterly Financial Data of the Company (unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Quarterly Financial Information Disclosure [Abstract]
Total revenues	$ 317,036	$ 307,545	$ 301,116	$ 301,695	$ 361,342	$ 374,600	$ 398,150	$ 377,381	$ 1,227,392	$ 1,511,473	$ 1,863,981
Total expenses	(267,678)	(265,553)	(258,303)	(258,282)	(314,108)	(333,913)	(365,749)	(332,675)	(1,049,816)	(1,346,445)	(1,868,599)
Equity in net income from unconsolidated joint ventures	(2,398)	971	4,702	4,036	7,788	4,078	3,412	6,614	7,311	21,892	11,874
Equity in net gain (loss) on sale of interest in unconsolidated joint venture/real estate	167,445	70,937	72,025	(6,440)	0	1,030	13,089	2,047	303,967	16,166	44,009
Gain on sale of real estate, net	(36,984)	(2,504)	(14,790)	23,521	76,497	0	(3,823)	567	(30,757)	73,241	238,116
Purchase price and other fair value adjustment	0	(3,057)	11,149	49,293					57,385	0	0
Depreciable real estate reserves and impairment	(220,852)	(6,691)	0	0	(93,184)	0	(29,064)	(56,272)	(227,543)	(178,520)	(10,387)
Change in unrealized gain (loss) on marketable securities					0	0	0	3,262
Loss on early extinguishment of debt	(14,889)	(2,194)	0	0					(17,083)	0	0
Noncontrolling interests and preferred unit distributions	838	(7,507)	(8,606)	(8,319)	(6,616)	(3,188)	(4,056)	14,165
Net income (loss) attributable to SL Green/SLGOP	(57,482)	91,947	107,293	105,504	31,719	42,607	11,959	15,089	247,262	101,374	249,896
Perpetual preferred stock dividends	(3,737)	(3,738)	(3,737)	(3,738)	(3,737)	(3,738)	(3,737)	(3,738)	(14,950)	(14,950)	(14,950)
Net income attributable to SL Green common stockholders	$ (61,219)	$ 88,209	$ 103,556	$ 101,766	$ 27,982	$ 38,869	$ 8,222	$ 11,351	$ 232,312	$ 86,424	$ 234,946
Net (loss) income attributable to common stockholders per common share - basic (usd per share)	$ (0.73)	$ 1.03	$ 1.19	$ 1.12	$ 0.29	$ 0.40	$ 0.08	$ 0.11
Net (loss) income attributable to common stockholders per common share - diluted (usd per share)	$ (0.73)	$ 1.03	$ 1.19	$ 1.12	$ 0.29	$ 0.40	$ 0.08	$ 0.11

XML

Quarterly Financial Data of the Operating Partnership (unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Condensed Income Statements, Captions [Line Items]
Total revenues	$ 317,036	$ 307,545	$ 301,116	$ 301,695	$ 361,342	$ 374,600	$ 398,150	$ 377,381	$ 1,227,392	$ 1,511,473	$ 1,863,981
Total expenses	(267,678)	(265,553)	(258,303)	(258,282)	(314,108)	(333,913)	(365,749)	(332,675)	(1,049,816)	(1,346,445)	(1,868,599)
Equity in net income from unconsolidated joint ventures	(2,398)	971	4,702	4,036	7,788	4,078	3,412	6,614	7,311	21,892	11,874
Equity in net gain (loss) on sale of interest in unconsolidated joint venture/real estate	167,445	70,937	72,025	(6,440)	0	1,030	13,089	2,047	303,967	16,166	44,009
(Loss) gain on sale of real estate, net	(36,984)	(2,504)	(14,790)	23,521	76,497	0	(3,823)	567	(30,757)	73,241	238,116
Purchase price and other fair value adjustment	0	(3,057)	11,149	49,293					57,385	0	0
Depreciable real estate reserves and impairment	(220,852)	(6,691)	0	0	(93,184)	0	(29,064)	(56,272)	(227,543)	(178,520)	(10,387)
Gain (loss) on sale of investment in marketable securities									0	3,262	(83)
Loss on early extinguishment of debt	(14,889)	(2,194)	0	0					(17,083)	0	0
Noncontrolling interests and preferred unit distributions	838	(7,507)	(8,606)	(8,319)	(6,616)	(3,188)	(4,056)	14,165
Net income (loss) attributable to SL Green/SLGOP	(57,482)	91,947	107,293	105,504	31,719	42,607	11,959	15,089	247,262	101,374	249,896
SL Green Operating Partnership
Condensed Income Statements, Captions [Line Items]
Total revenues	317,036	307,545	301,116	301,695	361,342	374,600	398,150	377,381	1,227,392	1,511,473	1,863,981
Total expenses	(267,678)	(265,553)	(258,303)	(258,282)	(314,108)	(333,913)	(365,749)	(332,675)	(1,049,816)	(1,346,445)	(1,868,599)
Equity in net income from unconsolidated joint ventures	(2,398)	971	4,702	4,036	7,788	4,078	3,412	6,614	7,311	21,892	11,874
Equity in net gain (loss) on sale of interest in unconsolidated joint venture/real estate	167,445	70,937	72,025	(6,440)	0	1,030	13,089	2,047	303,967	16,166	44,009
(Loss) gain on sale of real estate, net	(36,984)	(2,504)	(14,790)	23,521	76,497	0	(3,823)	567	(30,757)	73,241	238,116
Purchase price and other fair value adjustment	0	(3,057)	11,149	49,293					57,385	0	0
Depreciable real estate reserves and impairment	(220,852)	(6,691)	0	0	(93,184)	0	(29,064)	(56,272)	(227,543)	(178,520)	(10,387)
Gain (loss) on sale of investment in marketable securities					0	0	0	3,262	0	3,262	(83)
Loss on early extinguishment of debt	(14,889)	(2,194)	0	0					(17,083)	0	0
Noncontrolling interests and preferred unit distributions	(2,601)	(2,710)	(3,020)	(3,047)	(5,328)	(1,376)	(3,637)	14,641	(14,950)	(14,950)	(14,950)
Net income (loss) attributable to SL Green/SLGOP	(60,921)	96,744	112,879	110,776	33,007	44,419	12,378	15,565	259,478	105,369	260,032
Perpetual preferred stock dividends	(3,737)	(3,738)	(3,737)	(3,738)	(3,737)	(3,738)	(3,737)	(3,738)	(14,950)	(14,950)	(14,950)
Net income attributable to SLGOP common unitholders	$ (64,658)	$ 93,006	$ 109,142	$ 107,038	$ 29,270	$ 40,681	$ 8,641	$ 11,827	$ 244,528	$ 90,419	$ 245,082
Net income attributable to common unitholders per common share—basic (in dollars per share)	$ (0.73)	$ 1.03	$ 1.19	$ 1.12	$ 0.29	$ 0.40	$ 0.08	$ 0.11	$ 2.67	$ 0.87	$ 2.34
Net income attributable to common unitholders per common share—diluted (in dollars per share)	$ (0.73)	$ 1.03	$ 1.19	$ 1.12	$ 0.29	$ 0.40	$ 0.08	$ 0.11	$ 2.67	$ 0.87	$ 2.34

XML

Schedule II - Valuation and Qualifying Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Tenant and other receivables—allowance
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	$ 18,637	$ 16,592	$ 17,618
Additions Charged Against Operations	3,726	6,106	10,630
Uncollectible Accounts Written-off/Recovery (1)	(6,661)	(4,061)	(11,656)
Balance at End of Year	15,702	18,637	16,592
Deferred rent receivable—allowance
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	17,207	25,203	21,730
Additions Charged Against Operations	491	2,321	13,620
Uncollectible Accounts Written-off/Recovery (1)	(2,241)	(10,317)	(10,147)
Balance at End of Year	$ 15,457	$ 17,207	$ 25,203

XML

Schedule III - Real Estate and Accumulated Depreciation (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 1,660,659
Initial Cost
Land	1,776,213
Building & Improvements	5,370,786
Cost Capitalized Subsequent To Acquisition
Land	(1,314)
Building & Improvements	1,368,250
Gross Amount at Which Carried at Close of Period
Land	1,774,899
Building & Improvements	6,739,036
Total	8,513,935	$ 10,206,122	$ 12,743,332	$ 16,681,602
Accumulated Depreciation	2,099,137	$ 2,300,116	$ 2,264,694	$ 2,060,706
420 Lexington Avenue
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	300,000
Initial Cost
Land	0
Building & Improvements	107,832
Cost Capitalized Subsequent To Acquisition
Land	0
Building & Improvements	225,667
Gross Amount at Which Carried at Close of Period
Land	0
Building & Improvements	333,499
Total	333,499
Accumulated Depreciation	133,978
711 Third Avenue
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost
Land	19,844
Building & Improvements	42,499
Cost Capitalized Subsequent To Acquisition
Land	0
Building & Improvements	73,270
Gross Amount at Which Carried at Close of Period
Land	19,844
Building & Improvements	115,769
Total	135,613
Accumulated Depreciation	45,066
555 W. 57th Street
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost
Land	18,846
Building & Improvements	78,704
Cost Capitalized Subsequent To Acquisition
Land	0
Building & Improvements	62,242
Gross Amount at Which Carried at Close of Period
Land	18,846
Building & Improvements	140,946
Total	159,792
Accumulated Depreciation	69,817
220 East 42nd Street
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost
Land	50,373
Building & Improvements	203,727
Cost Capitalized Subsequent To Acquisition
Land	635
Building & Improvements	161,705
Gross Amount at Which Carried at Close of Period
Land	51,008
Building & Improvements	365,432
Total	416,440
Accumulated Depreciation	108,450
461 Fifth Avenue
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost
Land	0
Building & Improvements	62,695
Cost Capitalized Subsequent To Acquisition
Land	0
Building & Improvements	25,581
Gross Amount at Which Carried at Close of Period
Land	0
Building & Improvements	88,276
Total	88,276
Accumulated Depreciation	29,680
750 Third Avenue
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost
Land	51,093
Building & Improvements	205,972
Cost Capitalized Subsequent To Acquisition
Land	0
Building & Improvements	45,551
Gross Amount at Which Carried at Close of Period
Land	51,093
Building & Improvements	251,523
Total	302,616
Accumulated Depreciation	101,854
625 Madison Avenue
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost
Land	0
Building & Improvements	246,673
Cost Capitalized Subsequent To Acquisition
Land	0
Building & Improvements	44,646
Gross Amount at Which Carried at Close of Period
Land	0
Building & Improvements	291,319
Total	291,319
Accumulated Depreciation	118,380
485 Lexington Avenue
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	450,000
Initial Cost
Land	77,517
Building & Improvements	326,825
Cost Capitalized Subsequent To Acquisition
Land	765
Building & Improvements	125,806
Gross Amount at Which Carried at Close of Period
Land	78,282
Building & Improvements	452,631
Total	530,913
Accumulated Depreciation	183,003
609 Fifth Avenue
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost
Land	36,677
Building & Improvements	145,954
Cost Capitalized Subsequent To Acquisition
Land	0
Building & Improvements	49,527
Gross Amount at Which Carried at Close of Period
Land	36,677
Building & Improvements	195,481
Total	232,158
Accumulated Depreciation	43,777
810 Seventh Avenue
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost
Land	114,077
Building & Improvements	476,386
Cost Capitalized Subsequent To Acquisition
Land	0
Building & Improvements	74,433
Gross Amount at Which Carried at Close of Period
Land	114,077
Building & Improvements	550,819
Total	664,896
Accumulated Depreciation	176,354
1185 Avenue of the Americas
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost
Land	0
Building & Improvements	728,213
Cost Capitalized Subsequent To Acquisition
Land	0
Building & Improvements	62,893
Gross Amount at Which Carried at Close of Period
Land	0
Building & Improvements	791,106
Total	791,106
Accumulated Depreciation	265,896
1350 Avenue of the Americas
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost
Land	91,038
Building & Improvements	380,744
Cost Capitalized Subsequent To Acquisition
Land	(97)
Building & Improvements	50,773
Gross Amount at Which Carried at Close of Period
Land	90,941
Building & Improvements	431,517
Total	522,458
Accumulated Depreciation	136,853
100 Summit Lake Drive
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost
Land	10,526
Building & Improvements	43,109
Cost Capitalized Subsequent To Acquisition
Land	(3,337)
Building & Improvements	(94)
Gross Amount at Which Carried at Close of Period
Land	7,189
Building & Improvements	43,015
Total	50,204
Accumulated Depreciation	18,936
200 Summit Lake Drive
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost
Land	11,183
Building & Improvements	47,906
Cost Capitalized Subsequent To Acquisition
Land	(5,321)
Building & Improvements	(9,102)
Gross Amount at Which Carried at Close of Period
Land	5,862
Building & Improvements	38,804
Total	44,666
Accumulated Depreciation	21,203
500 Summit Lake Drive
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost
Land	9,777
Building & Improvements	39,048
Cost Capitalized Subsequent To Acquisition
Land	(3,601)
Building & Improvements	(7,875)
Gross Amount at Which Carried at Close of Period
Land	6,176
Building & Improvements	31,173
Total	37,349
Accumulated Depreciation	14,523
360 Hamilton Avenue
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost
Land	29,497
Building & Improvements	118,250
Cost Capitalized Subsequent To Acquisition
Land	(2,625)
Building & Improvements	8,005
Gross Amount at Which Carried at Close of Period
Land	26,872
Building & Improvements	126,255
Total	153,127
Accumulated Depreciation	43,901
1-6 Landmark Square
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	100,000
Initial Cost
Land	50,947
Building & Improvements	195,167
Cost Capitalized Subsequent To Acquisition
Land	(23,095)
Building & Improvements	(33,824)
Gross Amount at Which Carried at Close of Period
Land	27,852
Building & Improvements	161,343
Total	189,195
Accumulated Depreciation	79,012
7 Landmark Square
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost
Land	2,088
Building & Improvements	7,748
Cost Capitalized Subsequent To Acquisition
Land	(367)
Building & Improvements	669
Gross Amount at Which Carried at Close of Period
Land	1,721
Building & Improvements	8,417
Total	10,138
Accumulated Depreciation	1,539
1010 Washington Boulevard
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost
Land	7,747
Building & Improvements	30,423
Cost Capitalized Subsequent To Acquisition
Land	(1,259)
Building & Improvements	2,928
Gross Amount at Which Carried at Close of Period
Land	6,488
Building & Improvements	33,351
Total	39,839
Accumulated Depreciation	12,489
1055 Washington Boulevard
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost
Land	13,516
Building & Improvements	53,228
Cost Capitalized Subsequent To Acquisition
Land	(5,130)
Building & Improvements	(9,986)
Gross Amount at Which Carried at Close of Period
Land	8,386
Building & Improvements	43,242
Total	51,628
Accumulated Depreciation	20,382
One Madison Ave
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost
Land	172,641
Building & Improvements	654,394
Cost Capitalized Subsequent To Acquisition
Land	905
Building & Improvements	18,411
Gross Amount at Which Carried at Close of Period
Land	173,546
Building & Improvements	672,805
Total	846,351
Accumulated Depreciation	193,033
100 Church Street
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	213,208
Initial Cost
Land	32,494
Building & Improvements	79,996
Cost Capitalized Subsequent To Acquisition
Land	2,500
Building & Improvements	103,936
Gross Amount at Which Carried at Close of Period
Land	34,994
Building & Improvements	183,932
Total	218,926
Accumulated Depreciation	53,269
125 Park Avenue
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost
Land	120,900
Building & Improvements	189,714
Cost Capitalized Subsequent To Acquisition
Land	0
Building & Improvements	80,884
Gross Amount at Which Carried at Close of Period
Land	120,900
Building & Improvements	270,598
Total	391,498
Accumulated Depreciation	77,542
Williamsburg
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost
Land	3,677
Building & Improvements	14,708
Cost Capitalized Subsequent To Acquisition
Land	2,523
Building & Improvements	(4,550)
Gross Amount at Which Carried at Close of Period
Land	6,200
Building & Improvements	10,158
Total	16,358
Accumulated Depreciation	2,127
110 East 42nd Street
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost
Land	34,000
Building & Improvements	46,411
Cost Capitalized Subsequent To Acquisition
Land	2,196
Building & Improvements	31,942
Gross Amount at Which Carried at Close of Period
Land	36,196
Building & Improvements	78,353
Total	114,549
Accumulated Depreciation	17,400
400 East 58th Street
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	39,931
Initial Cost
Land	17,549
Building & Improvements	30,916
Cost Capitalized Subsequent To Acquisition
Land	0
Building & Improvements	7,833
Gross Amount at Which Carried at Close of Period
Land	17,549
Building & Improvements	38,749
Total	56,298
Accumulated Depreciation	$ 6,119
Interest in property (as a percent)	90.00%
752 Madison Avenue
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost
Land	282,415
Building & Improvements	7,131
Cost Capitalized Subsequent To Acquisition
Land	1,871
Building & Improvements	1,183
Gross Amount at Which Carried at Close of Period
Land	284,286
Building & Improvements	8,314
Total	292,600
Accumulated Depreciation	1,380
762 Madison Avenue
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	771
Initial Cost
Land	6,153
Building & Improvements	10,461
Cost Capitalized Subsequent To Acquisition
Land	0
Building & Improvements	109
Gross Amount at Which Carried at Close of Period
Land	6,153
Building & Improvements	10,570
Total	16,723
Accumulated Depreciation	$ 1,884
Interest in property (as a percent)	90.00%
19-21 East 65th Street
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost
Land	0
Building & Improvements	7,389
Cost Capitalized Subsequent To Acquisition
Land	0
Building & Improvements	1,100
Gross Amount at Which Carried at Close of Period
Land	0
Building & Improvements	8,489
Total	8,489
Accumulated Depreciation	$ 1,228
Interest in property (as a percent)	90.00%
304 Park Avenue
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost
Land	54,189
Building & Improvements	75,619
Cost Capitalized Subsequent To Acquisition
Land	300
Building & Improvements	15,024
Gross Amount at Which Carried at Close of Period
Land	54,489
Building & Improvements	90,643
Total	145,132
Accumulated Depreciation	19,315
635 Sixth Avenue
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost
Land	24,180
Building & Improvements	37,158
Cost Capitalized Subsequent To Acquisition
Land	163
Building & Improvements	51,103
Gross Amount at Which Carried at Close of Period
Land	24,343
Building & Improvements	88,261
Total	112,604
Accumulated Depreciation	10,931
641 Sixth Avenue
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost
Land	45,668
Building & Improvements	67,316
Cost Capitalized Subsequent To Acquisition
Land	308
Building & Improvements	9,760
Gross Amount at Which Carried at Close of Period
Land	45,976
Building & Improvements	77,076
Total	123,052
Accumulated Depreciation	15,891
1080 Amsterdam
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	35,807
Initial Cost
Land	0
Building & Improvements	27,445
Cost Capitalized Subsequent To Acquisition
Land	0
Building & Improvements	20,503
Gross Amount at Which Carried at Close of Period
Land	0
Building & Improvements	47,948
Total	47,948
Accumulated Depreciation	$ 5,441
Interest in property (as a percent)	92.50%
315 West 33rd Street
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 250,000
Initial Cost
Land	195,834
Building & Improvements	164,429
Cost Capitalized Subsequent To Acquisition
Land	0
Building & Improvements	15,133
Gross Amount at Which Carried at Close of Period
Land	195,834
Building & Improvements	179,562
Total	375,396
Accumulated Depreciation	25,397
562 Fifth Avenue
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost
Land	57,052
Building & Improvements	10,487
Cost Capitalized Subsequent To Acquisition
Land	0
Building & Improvements	1,213
Gross Amount at Which Carried at Close of Period
Land	57,052
Building & Improvements	11,700
Total	68,752
Accumulated Depreciation	4,458
719 Seventh Avenue
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	50,000
Initial Cost
Land	41,850
Building & Improvements	0
Cost Capitalized Subsequent To Acquisition
Land	(670)
Building & Improvements	46,232
Gross Amount at Which Carried at Close of Period
Land	41,180
Building & Improvements	46,232
Total	87,412
Accumulated Depreciation	$ 3,025
Interest in property (as a percent)	75.00%
115 Spring Street
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 65,550
Initial Cost
Land	11,078
Building & Improvements	44,799
Cost Capitalized Subsequent To Acquisition
Land	0
Building & Improvements	1,850
Gross Amount at Which Carried at Close of Period
Land	11,078
Building & Improvements	46,649
Total	57,727
Accumulated Depreciation	5,248
1640 Flatbush Avenue
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost
Land	6,226
Building & Improvements	501
Cost Capitalized Subsequent To Acquisition
Land	0
Building & Improvements	503
Gross Amount at Which Carried at Close of Period
Land	6,226
Building & Improvements	1,004
Total	7,230
Accumulated Depreciation	50
110 Greene Street
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost
Land	45,120
Building & Improvements	215,470
Cost Capitalized Subsequent To Acquisition
Land	0
Building & Improvements	12,923
Gross Amount at Which Carried at Close of Period
Land	45,120
Building & Improvements	228,393
Total	273,513
Accumulated Depreciation	$ 23,683
Interest in property (as a percent)	90.00%
5- 7 Dey Street
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 111,869
Initial Cost
Land	13,400
Building & Improvements	34,175
Cost Capitalized Subsequent To Acquisition
Land	32,022
Building & Improvements	(6,310)
Gross Amount at Which Carried at Close of Period
Land	45,422
Building & Improvements	27,865
Total	73,287
Accumulated Depreciation	419
30 East 40th Street
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost
Land	4,650
Building & Improvements	20,000
Cost Capitalized Subsequent To Acquisition
Land	2
Building & Improvements	6,654
Gross Amount at Which Carried at Close of Period
Land	4,652
Building & Improvements	26,654
Total	31,306
Accumulated Depreciation	$ 2,017
Interest in property (as a percent)	60.00%
113 Greene Street
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 15,523
Initial Cost
Land	3,446
Building & Improvements	27,542
Cost Capitalized Subsequent To Acquisition
Land	0
Building & Improvements	0
Gross Amount at Which Carried at Close of Period
Land	3,446
Building & Improvements	27,542
Total	30,988
Accumulated Depreciation	119
712 Madison Avenue
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	28,000
Initial Cost
Land	7,207
Building & Improvements	47,397
Cost Capitalized Subsequent To Acquisition
Land	0
Building & Improvements	0
Gross Amount at Which Carried at Close of Period
Land	7,207
Building & Improvements	47,397
Total	54,604
Accumulated Depreciation	0
Other
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost
Land	1,738
Building & Improvements	16,225
Cost Capitalized Subsequent To Acquisition
Land	(2)
Building & Improvements	(1)
Gross Amount at Which Carried at Close of Period
Land	1,736
Building & Improvements	16,224
Total	17,960
Accumulated Depreciation	$ 4,068

XML

Schedule III - Real Estate and Accumulated Depreciation (Activity in Real Estate and Accumulated Depreciation) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Changes in real estate
Balance at beginning of year	$ 10,206,122	$ 12,743,332	$ 16,681,602
Property acquisitions	52,939	13,323	29,230
Improvements	267,726	342,014	426,060
Retirements/disposals/deconsolidation	(2,012,852)	(2,892,547)	(4,393,560)
Balance at end of year	8,513,935	10,206,122	12,743,332
Aggregate cost of land, buildings and improvements before depreciation	9,900,000
Changes in accumulated depreciation
Balance at beginning of year	2,300,116	2,264,694	2,060,706
Depreciation for year	245,033	347,015	353,502
Retirements/disposals/deconsolidation	(446,012)	(311,593)	(149,514)
Balance at end of year	$ 2,099,137	$ 2,300,116	$ 2,264,694

XML

Label	Element	Value
Accounting Standards Update 2014-09 [Member] | Retained Earnings [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	$ 570,524,000