10-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-K

(mark one)
☒	Annual report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934
	for the fiscal year ended December 31, 2019
OR
☐	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 001-36113 (Columbia Property Trust, Inc.) Commission file number 333-175623 (Columbia Property Trust Operating Partnership, L.P.)
COLUMBIA PROPERTY TRUST, INC.
COLUMBIA PROPERTY TRUST OPERATING PARTNERSHIP, L.P.
(Exact name of registrant as specified in its charter)

Maryland (Columbia Property Trust, Inc.)		20-0068852
Delaware (Columbia Property Trust Operating Partnership, L.P.)		20-0068907
(State or other jurisdiction of incorporation or organization)		(I.R.S. Employer Identification Number)
315 Park Avenue South
New York, New York 10010
(Address of principal executive offices) (Zip Code)
(212) 687-0800
(Registrant's telephone number, including area code)
Securities registered pursuant to Section 12 (b) of the Act:
Title of each class	Trading Symbol	Name of exchange on which registered
Common Stock, $0.01 par value	CXP	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.
Columbia Property Trust, Inc.	Yes  ☒    No  ☐	Columbia Property Trust Operating Partnership, L.P.	Yes  ☒    No  ☐
Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Exchange Act.
Columbia Property Trust, Inc.	Yes  ☐    No  ☒	Columbia Property Trust Operating Partnership, L.P.	Yes  ☐    No  ☒
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.
Columbia Property Trust, Inc.	Yes  ☒    No  ☐	Columbia Property Trust Operating Partnership, L.P.	Yes  ☒    No  ☐
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).
Columbia Property Trust, Inc.	Yes  ☒    No  ☐	Columbia Property Trust Operating Partnership, L.P.	Yes  ☒    No  ☐
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", "emerging growth company" in Rule 12b-2 of the Exchange Act.
Columbia Property Trust, Inc.:
Large accelerated filer ☒		Smaller reporting company ☐
Accelerated filer o		Emerging Growth Company ☐
Non-accelerated filer o
Columbia Property Trust Operating Partnership, L.P.
Large accelerated filer o		Smaller reporting company ☐
Accelerated filer o		Emerging Growth Company ☐
Non-accelerated filer ☒
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.
Columbia Property Trust, Inc.	☐	Columbia Property Trust Operating Partnership, L.P.	☐
Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Act).
Columbia Property Trust, Inc.	Yes  ☐    No  ☒	Columbia Property Trust Operating Partnership, L.P.	Yes  ☐    No  ☒

As of June 30, 2019, the aggregate market value of the common stock of Columbia Property Trust, Inc. held by non-affiliates was

$1,744,911,617 based on the closing price as reported by the New York Stock Exchange.

As of January 31, 2020, 115,232,240 shares of common stock were outstanding.

Registrant incorporates by reference portions of the Columbia Property Trust, Inc. Definitive Proxy Statement for the 2020 Annual Meeting of Stockholders (Items 10, 11, 12, 13, and 14 of Part III) to be filed prior to April 29, 2020.

FORM 10-K

COLUMBIA PROPERTY TRUST, INC.

COLUMBIA PROPERTY TRUST OPERATING PARTNERSHIP, L.P.

TABLE OF CONTENTS

		Page
PART I.
Item 1.	Business	6
Item 1A.	Risk Factors	9
Item 1B.	Unresolved Staff Comments	25
Item 2.	Properties	25
Item 3.	Legal Proceedings	27
Item 4.	Mine Safety Disclosures	27
PART II.
Item 5.	Market for Registrant's Common Equity, Related Stockholder Matters, and Issuer Purchases of Equity Securities	28
Item 6.	Selected Financial Data	31
Item 7.	Management's Discussion and Analysis of Financial Condition and Results of Operations	32
Item 7A.	Quantitative and Qualitative Disclosures about Market Risk	49
Item 8.	Financial Statements and Supplementary Data	50
Item 9.	Changes in and Disagreements with Accountants on Accounting and Financial Disclosure	50
Item 9A.	Controls and Procedures	51
Item 9B.	Other Information	55
PART III.
Item 10.	Directors, Executive Officers, and Corporate Governance	56
Item 11.	Executive Compensation	56
Item 12.	Security Ownership of Certain Beneficial Owners and Management and Related Shareholder Matters	56
Item 13.	Certain Relationships and Related Transactions, and Director Independence	56
Item 14.	Principal Accountant Fees and Services	56
PART IV.
Item 15.	Exhibits and Financial Statement Schedules	57
Signatures		60

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EXPLANATORY NOTE

This report combines the annual reports on Form 10-K for the year ended December 31, 2019 of Columbia Property Trust, Inc. ("Columbia Property Trust") and Columbia Operating Partnership, L.P. ("Columbia OP"), using a separate set of consolidated financial statements for each entity and a combined set of notes thereto. As of December 31, 2019 and December 31, 2018, and for the three-years ended December 31, 2019, Columbia Property Trust was the sole owner and general partner of Columbia OP. On January 24, 2020, Columbia Property Trust acquired Normandy Real Estate Management, LLC ("Normandy") for $100.0 million, which was comprised of a $13.5 million cash payment and the issuance of 3,264,151 Series A Convertible, Perpetual Preferred Units of Columbia OP. Immediately following the Normandy acquisition, Columbia Property Trust owned approximately 97.2% of Columbia OP. Unless stated otherwise or the context otherwise requires, references to "Columbia Property Trust," "the Company," "we," "us," and "our" shall mean, collectively, Columbia Property Trust, Inc., Columbia OP, and the entities consolidated by the Company; and references to "Columbia OP" shall mean Columbia OP and the entities consolidated by Columbia OP.

Columbia Property Trust, Inc. guarantees certain debt issued by Columbia OP (see Note 6, Bonds Payable, to the accompanying consolidated financial statements). The Company is including audited consolidated financial statements for Columbia OP, the subsidiary issuer as defined in the bond indentures, in this report on Form 10-K to comply with the requirements of SEC Rule 3-10(c). In prior periods, in lieu of presenting separate financial statements for Columbia OP, the Company opted to present condensed consolidating financial information in a footnote to Columbia Property Trust's consolidated financial statements. Columbia OP is voluntarily co-filing its annual report with that of Columbia Property Trust because, following the Normandy acquisition described above, the Company will no longer be able to rely on Rule 3-10(c), and Columbia OP will become subject to the reporting requirements of the Securities Exchange Act of 1934, as amended, or the Exchange Act.

Columbia OP is the entity through which we conduct substantially all of our business and own, either directly or through subsidiaries, substantially all of our assets. We believe that combining the two annual reports on Form 10-K for Columbia Property Trust and Columbia OP provides the following benefits:

•enhances investors' understanding of Columbia Property Trust and Columbia OP by enabling investors to view the business as a whole in the same manner that management views and operates the business;

•eliminates duplicative disclosure and provides a more streamlined and readable presentation, since a substantial portion of the disclosure applies to both the Company and the Operating Partnership; and

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

The Company believes that it is important to understand the differences between Columbia Property Trust and Columbia OP in the context of how Columbia Property Trust and Columbia OP operate as a consolidated company. The financial results of Columbia OP are consolidated into the financial statements of Columbia Property Trust. Columbia Property Trust does not have significant assets, liabilities, or operations, other than its investment in Columbia OP. Columbia OP, not Columbia Property Trust, generally conducts all significant business relationships for the Company other than transactions involving the securities of Columbia Property Trust. The primary differences between Columbia Property Trust and Columbia OP involve the following:

•Columbia Property Trust owned two properties directly during the periods presented;

•Columbia Property Trust has made intercompany loans to certain of its consolidated subsidiaries;

•Columbia Property Trust has issued common stock to investors and employees, and has repurchased its common stock. The substantial majority of Columbia Property Trust's net common stock proceeds have been contributed to Columbia OP.

To help investors better understand the differences between Columbia Property Trust and Columbia OP, the following information has been presented separately for Columbia Property Trust and Columbia OP in this report:

•consolidated financial statements;

•certain accompanying notes to consolidated financial statements, including Note 5, Line of Credit and Notes Payable; Note 6, Bonds Payable; and Note 8, Stockholders' Equity and Partner's Capital.

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•controls and procedures in Item 9A of Part II of this report; and

•certifications of the Chief Executive Officer and Chief Financial Officer included as Exhibits 31.1 through 32.2.

CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS

Certain statements contained in this Form 10-K of Columbia Property Trust, Inc. and its subsidiaries, including Columbia OP ("Columbia Property Trust," "we," "our," or "us"), other than historical facts may constitute "forward-looking statements” within the meaning of the Private Litigation Reform Act of 1995 (set forth in Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934). We intend for all such forward-looking statements presented in this annual report on Form 10-K ("Form 10-K"), or that management may make orally or in writing from time to time, to be covered by the applicable safe harbor provisions for forward-looking statements contained in those acts.

Such statements in this Form 10-K include, among other things, information about possible or assumed future results of the business and our financial condition, liquidity, results of operations, plans, strategies, prospects, and objectives. Such forward-looking statements can generally be identified by our use of forward-looking terminology such as "may," "will," "expect," "intend," "anticipate," "estimate," "believe," "continue," or other similar words. As forward-looking statements, these statements are subject to certain risks and uncertainties, including known and unknown risks, which could cause actual results to differ materially from those projected or anticipated. These risks, uncertainties, and other factors include, without limitation:

•risks affecting the real estate industry and the office sector, in particular (such as the inability to enter into new leases, dependence on tenants' financial condition, and competition from other owners of real estate);

•risks relating to lease terminations, lease defaults, or changes in the financial condition of our tenants, particularly by a significant tenant;

•risks relating to our ability to maintain and increase property occupancy rates and rental rates;

•adverse economic or real estate market developments in our target markets;

•risks relating to the use of debt to fund acquisitions;

•availability and terms of financing;

•ability to refinance indebtedness as it comes due;

•sensitivity of our operations and financing arrangements to fluctuations in interest rates;

•reductions in asset valuations and related impairment charges;

•risks relating to construction, development, and redevelopment activities;

•risks associated with joint ventures, including disagreements with, or misconduct by, joint venture partners;

•risks relating to repositioning our portfolio;

•risks relating to reduced demand for, or over supply of, office space in our markets;

•risks relating to acquisition and disposition activities;

•ability to successfully integrate our operations and employees in connection with the acquisition of Normandy Real Estate Management ("Normandy");

•ability to realize anticipated benefits and synergies of the acquisition of Normandy;

•amount of the costs, fees, expenses, and charges related to the acquisition of Normandy;

•risks associated with our ability to continue to qualify as a real estate investment trust ("REIT");

•risks associated with possible cybersecurity attacks against us or any of our tenants;

•potential liability for uninsured losses and environmental contamination;

•potential adverse impact of market interest rates on the market price for our securities; and

•risks associated with our dependence on key personnel whose continued service is not guaranteed.

For further discussion of these and additional risks and uncertainties that may cause actual results to differ from

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expectations, see Item 1A, Risk Factors, and other information contained in this Form 10-K and our other periodic reports filed with the SEC. Although we believe that the expectations reflected in such forward-looking statements are based on reasonable assumptions, we can give no assurances that our expectations will be achieved. Readers are cautioned not to place undue reliance on these forward-looking statements, which speak only as of the date this Form 10-K is filed with the U.S. Securities and Exchange Commission ("SEC"). We do not intend to update or revise any forward-looking statement, whether as a result of new information, future events, or otherwise.

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PART I

ITEM 1.BUSINESS

General

Columbia Property Trust, Inc. ("Columbia Property Trust") (NYSE: CXP) is a Maryland corporation that operates as a real estate investment trust ("REIT") for federal income tax purposes and owns and operates commercial real estate properties. Columbia Property Trust conducts business primarily through Columbia Property Trust Operating Partnership, L.P. ("Columbia OP"), a Delaware limited partnership of which Columbia Property Trust is the general partner and sole owner as of December 31, 2019. Columbia Property Trust acquires, develops, redevelops, owns, leases, and operates real properties directly and through wholly and partially owned subsidiaries and joint ventures. Unless stated otherwise or the context otherwise requires, references to "Columbia Property Trust," "the Company," "we," "us," and "our" shall mean, collectively, Columbia Property Trust, Columbia OP, and the entities consolidated by both Columbia Property Trust and Columbia OP; and references to "Columbia OP" shall mean Columbia OP and the entities consolidated by Columbia OP.

As of December 31, 2019, the Company owned 17 operating properties and three properties under development or redevelopment, of which 13 were wholly owned and seven were owned through joint ventures, located primarily in New York, San Francisco, and Washington, D.C. As of December 31, 2019, the operating properties contained a total of 7.3 million rentable square feet and were approximately 97.1% leased.

On January 24, 2020, we acquired Normandy Real Estate Management ("Normandy"), a leading developer, operator, and investment manager of office and mixed-use assets in New York; Boston; and Washington, D.C., for approximately $100.0 million, exclusive of transaction and closing costs (the "Normandy Acquisition"). The purchase consideration for the Normandy Acquisition includes a $13.5 million cash payment and the issuance of 3,264,151 units of Columbia OP. After giving effect to this transaction, Columbia Property Trust owns approximately 97.2% of Columbia OP.

Real Estate Investment Objectives

We seek to acquire, develop, or redevelop and manage a commercial real estate portfolio that provides the size, quality, and market specialization needed to deliver both income and long-term growth, as measured in total return to our stockholders. Our primary strategic objective is to generate long-term stockholder returns from a combination of steadily growing cash flows and appreciation in our net asset values, through the acquisition and ownership of high-quality office buildings located principally in high-barrier-to-entry markets. Our value creation and growth strategies are founded in the following:

Targeted Market Strategy

Our portfolio consists of a combination of multi- and single-tenant office properties located primarily in Central Business Districts ("CBD"). We focus our acquisition efforts in select primary markets with strong fundamentals and liquidity, including CBD and urban in-fill locations. We believe that the gateway office markets provide the greatest opportunity for increasing net income and property values over time. We maintain a long-term goal of increasing our presence in our target markets in order to leverage our scale, efficiency, and market knowledge.

New Investment Targets

We look to acquire, develop, or redevelop strategic and premier office assets with quality tenants in our target markets. We concentrate on office buildings that are competitive within the top tier of their markets or that can be repositioned as such through value-add initiatives. In addition, our investment objectives include optimizing our portfolio allocation between stabilized investments and more growth-oriented, value-add investments, with an emphasis on CBDs and multi-tenant buildings.

Strong and Flexible Balance Sheet

We are committed to maintaining an investment-grade balance sheet with a strong liquidity profile and proven access to capital. Our leverage level and other credit metrics provide the financial flexibility to pursue new

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acquisitions, development and redevelopment projects, and other growth opportunities that will further our long-term performance objectives.

Capital Recycling

To date, we have primarily sold non-strategic assets (generally defined as assets outside our target markets) to increase our concentration in our target markets. In the future, we also anticipate selling some assets from our target markets to maintain a well-balanced portfolio and to harvest capital from mature assets. Our goals are to foster long-term growth and capital appreciation in our portfolio by maintaining the following:   an appropriate balance of core investments relative to value-add investments, building profiles that will continue to attract prospects for future rent growth, and activity levels that will continue to support our connections in the real estate community. We routinely evaluate our portfolio to identify assets that are good candidates for disposition in the furtherance of these goals.

Proactive Asset Management

We believe our team is well-equipped to deliver operating results in all facets of the management process. Our leasing efforts are founded in understanding the varied and complex needs of tenants in the marketplace today. We pursue meeting those needs through new and renewal leases, as well as lease restructures that further our long-term goals. We are committed to prudent capital investment in our assets to ensure their competitive positioning and status, and rigorously pursue efficient operations and cost containment at the property level.

Transaction Activity

In connection with repositioning our portfolio, and in furtherance of our real estate investment objectives, we have executed the following real estate transactions during 2019, 2018, and 2017. See Note 3, Real Estate Transactions, of the accompanying consolidated financial statements for additional details.

Acquisitions
Property	Location	% Acquired		Square Feet	Acquisition Date	Purchase Price (in thousands)(1)
2019
201 California Street	San Francisco, CA	100.0	%	252,000	December 9, 2019	$	238,900
101 Franklin Street	New York, NY	92.5	%	235,000	December 2, 2019	$	205,500
2018
Lindbergh Center – Retail	Atlanta, GA	100.0	%	147,000	October 24, 2018	$	23,000
799 Broadway	New York, NY	49.7	%	182,000	October 3, 2018	$	30,200	(2)
2017
149 Madison Avenue	New York, NY	100.0	%	127,000	November 28, 2017	$	87,700
249 West 17th Street & 218 West 18th Street	New York, NY	100.0	%	447,000	October 11, 2017	$	514,100
1800 M Street	Washington, D.C.	55.0	%	581,000	October 11, 2017	$	231,550	(2)
114 Fifth Avenue	New York, NY	49.5	%	352,000	July 6, 2017	$	108,900	(2)

⁽¹⁾  Exclusive of transaction costs and price adjustments.

⁽²⁾ Purchase price is for our partial interests in the properties. These properties are owned through unconsolidated joint ventures. Refer to Note 3, Real Estate Transactions, and Note 4, Unconsolidated Joint Ventures, of the accompanying consolidated financial statements for more information.

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Dispositions
Property	Location	% Sold			Rentable Square Feet	Disposition Date	Sale Price (in thousands)
2019
Lindbergh Center	Atlanta, GA	100.0	%		1,105,000	September 26, 2019	$	187,000
One & Three Glenlake Parkway	Atlanta, GA	100.0	%		711,000	April 15, 2019	$	227,500
2018
222 East 41st Street	New York, NY	100.0	%		390,000	May 29, 2018	$	332,500
263 Shuman Boulevard	Chicago, IL	100.0	%		354,000	April 13, 2018	$	49,000	(1)
University Circle & 333 Market Street Joint Ventures	San Francisco, CA	22.5	%	(2)	1,108,000	February 1, 2018	$	235,300	(2)
2017
University Circle	San Francisco, CA	22.5	%	(2)	451,000	July 6, 2017	$	121,500	(3)
333 Market Street	San Francisco, CA	22.5	%	(2)	657,000	July 6, 2017	$	112,500	(3)
Key Center Tower & Marriott	Cleveland, OH	100.0	%		1,326,000	January 31, 2017	$	267,500
Houston Property Sale	Houston, TX	100.0	%		1,187,000	January 6, 2017	$	272,000

⁽¹⁾On April 13, 2018, we returned 263 Shuman to the lender in settlement of the related $49 million mortgage note.

⁽²⁾On February 1, 2018, we sold an additional 22.5% interest in both University Circle and 333 Market Street to our joint venture partner, Allianz for $235.3 million, as described in Note 3, Real Estate Transactions, of the accompanying consolidated financial statements.

⁽³⁾Sale price is for the partial interests in the properties. After partial sale, these properties are owned through unconsolidated joint ventures. Please refer to Note 3, Real Estate Transactions, and Note 4, Unconsolidated Joint Ventures, of the accompanying consolidated financial statements for more information.

Segment Information

As of December 31, 2019, our reportable segments are determined based on high-barrier-to-entry markets and other geographic markets in which we have significant investments. We consider geographic location when evaluating our portfolio composition and in assessing the ongoing operations and performance of our properties. See Note 15, Segment Information, to the accompanying consolidated financial statements.

Employees

As of December 31, 2019, we employed 93 people.

Competition

Leasing real estate is highly competitive in the current market. As a result, we experience competition for high-quality tenants from owners and managers of competing projects. Therefore, we may experience delays in re-leasing vacant space, or we may have to provide rent concessions, incur charges for tenant improvement allowances, or offer other inducements to enable us to timely lease vacant space, all of which may have an adverse impact on our results of operations. In addition, we are in competition with other potential buyers for the acquisition of the same properties, which may result in an increase in the amount we must pay to purchase a property. Further, at the time we elect to dispose of our properties, we will also be in competition with sellers of similar properties to locate suitable purchasers.

Concentration of Credit Risk

We are dependent upon the ability of our tenants to pay their contractual rent amounts as they become due. The inability of a tenant to pay future rental amounts could result in a material adverse impact on our results of

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operations. We are not aware of any reason why our current tenants would not be able to pay their contractual rental amounts as they become due in all material respects. Based on our 2019 annualized lease revenue, no single tenant accounts for more than 6% of our portfolio. See Item 1A, Risk Factors, for additional discussion of how our dependence on tenants for our revenue, and lease defaults or terminations, particularly by a significant tenant, could negatively affect our financial condition and results of operations and limit our ability to make distributions to our stockholders.

Website Address

Access to copies of each of our annual reports on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K, proxy statements, and other documents filed with, or furnished to, the SEC, including amendments to such filings, may be obtained free of charge from our website, www.columbia.reit, or through a link to the www.sec.gov website. The information contained on our website is not incorporated by reference herein. These filings are available promptly after we file them with, or furnish them to, the SEC.

ITEM 1A.RISK FACTORS

Below are some of the risks and uncertainties that could cause our actual results to differ materially from those presented in our forward-looking statements. The risks and uncertainties described below are not the only ones we face but do represent those risks and uncertainties that we believe are material to our business, operating results, prospects, and financial condition. Additional risks and uncertainties not presently known to us or that we currently deem immaterial may also harm our business.

Risks Related to Our Business and Properties

If we are unable to find suitable investments or they become too expensive, we may not be able to achieve our investment objectives, and the returns on our investments will be lower than they otherwise would be; if we are unable to sell a property when we plan to do so, our operational and financial flexibility may become limited, including our ability to pay cash distributions to our stockholders.

We are competing for real estate investments with other REITs; real estate limited partnerships; pension funds and their advisors; bank and insurance company investment accounts; individuals; non U.S. investors; and other entities. The market for high-quality commercial real estate assets is highly competitive, given how infrequently those assets become available for purchase. As a result, many real estate investors, including us, face aggressive competition to purchase quality office real estate assets. A significant number of entities and resources competing for high-quality office properties support relatively high acquisition prices for such properties, which may reduce the number of acquisition opportunities available to, or affordable for, us and could put pressure on our profitability and our ability to pay distributions to stockholders. We cannot be sure that we will be successful in obtaining suitable investments with financially attractive terms or that, if we make investments, our objectives will be achieved.

Because real estate investments are relatively illiquid, our ability to promptly sell one or more properties in our portfolio in response to changing economic, financial, and investment conditions may be limited. Purchasers may not be willing to pay acceptable prices for properties that we wish to sell. General economic conditions, availability of financing, interest rates, capitalization rates, and other factors, including supply and demand, all of which are beyond our control, affect the real estate market. Therefore, we may be unable to sell a property for the price, on the terms, or within the time frame that we want. That inability could reduce our cash flow and cause our results of operations to suffer, limiting our ability to make distributions to our stockholders. Additionally, our properties' market values depend principally upon the value of the properties' leases and the net operating income generated by the leases. A property may incur vacancies either by the default of tenants under their leases or the expiration of tenant leases. If vacancies occur and continue for a prolonged period of time, it may become difficult to locate suitable buyers for any such property, and property resale values may suffer, which could result in lower returns for our stockholders.

Further, timing differences in our acquisitions and dispositions may create temporary fluctuations in our earnings and cash available for distribution to stockholders.

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Economic and political conditions may cause the creditworthiness of our tenants to deteriorate and occupancy and market rental rates to decline.

Although U.S. macroeconomic conditions continued to be relatively stable during 2019, several economic factors, including potential increases in interest rates, may adversely affect the financial condition and liquidity of many businesses, as well as the general demand for office space. Further, our tenants might be adversely impacted by the specific consequences of, and the general market uncertainty associated with, geopolitical developments that could negatively affect international trade, including the United Kingdom's withdrawal from the European Union, the termination or threatened termination of existing international trade agreements, the outbreak or escalation of armed hostilities or acts of terrorism, or the implementation of tariffs or retaliatory tariffs on imported or exported goods. Should economic conditions worsen, our tenants' ability to honor their contractual obligations may suffer. Further, it may become increasingly difficult to maintain our occupancy rate and achieve future rental rates comparable to the rental rates of our currently in-place leases as we seek to re-lease space and/or renew existing leases.

Our office properties were approximately 97.1% leased at December 31, 2019, and amounts written off for uncollectible tenant receivables, net of recoveries, were less than 0.1% of total revenues for the year then ended. As a percentage of 2019 annualized lease revenue, approximately 3% of leases expire in 2020, 8% of leases expire in 2021, and 7% of leases expire in 2022 (see Item 2, Properties). No assurances can be given that economic conditions will not have a material adverse effect on our ability to re-lease space at favorable rates or on our ability to maintain our current occupancy rate and our low provisions for uncollectible tenant receivables.

Changes in general economic conditions and regulatory matters germane to the real estate industry may cause our operating results to suffer and the value of our real estate properties to decline.

Our operating results are subject to risks generally incident to the ownership of real estate, including:

•changes in general or local economic conditions;

•competition from other office buildings;

•increased operating costs, including insurance expenses, utilities, real estate taxes, state and local taxes and heightened security costs;

•decreases in the underlying value of our real estate;

•changes in supply of or demand for similar or competing properties in an area;

•changes in interest rates and availability of permanent mortgage funds, which may render the sale of a property difficult or unattractive;

•inability to finance property development or acquisitions on favorable terms;

•the relative illiquidity of real estate investments;

•changes in space utilization by our tenants due to technology, economic conditions, and business culture;

•changes in tax, real estate, environmental, and zoning laws; and

•periods of rising or higher interest rates and tight money supply.

These and other reasons may prevent us from being profitable or from realizing growth or maintaining the value of our real estate properties.

We face risks associated with property development or redevelopment.

We may acquire and develop or redevelop properties, including unimproved real estate, upon which we will construct improvements. Such activities present a number of risks for us, including risks that:

•if we are unable to obtain all necessary zoning and other required governmental permits and authorizations or cease development of the project for any other reason, the development opportunity may be abandoned or postponed after expending significant resources, resulting in the loss of deposits or failure to recover expenses already incurred;

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•the development and construction costs of the project may exceed original estimates due to increased interest rates and increased cost of materials, labor, leasing, or other expenditures, which could make the completion of the project less profitable because market rents may not increase sufficiently to compensate for the increase in construction costs;

•construction and/or permanent financing may not be available on favorable terms or may not be available at all, which may cause the cost of the project to increase and lower the expected return;

•the project may not be completed on schedule, or at all, as a result of a variety of factors, many of which are beyond our control, such as weather, labor conditions, economic conditions, and material shortages, which would result in increases in construction costs and debt service expenses;

•we may encounter delays, refusals, and unforeseen cost increases resulting from third-party litigation or objections;

•if a contractor's performance is affected or delayed by conditions beyond the contractor's control, we may incur additional risks when we make periodic progress payments or other advances to contractors before they complete construction;

•the time between commencement of a development project and the stabilization of the completed property exposes us to risks associated with fluctuations in local and regional economic conditions; and

•leasing pace, occupancy rates and rents at the completed property may not meet the expected levels and could be insufficient to make the property profitable in the expected time frames.

Properties developed or acquired for development or redevelopment may generate little or no cash flow from the date of acquisition through the date of completion of development. In addition, new development activities, regardless of whether or not they are ultimately successful, may require a substantial portion of management's time and attention.

These risks could result in substantial unanticipated delays or expenses and, under certain circumstances, could prevent completion of development activities once undertaken. Any of the foregoing could have an adverse effect on our financial condition, results of operations, or ability to satisfy our debt service obligations.

We are dependent upon the economic environment of our primary markets – New York; San Francisco; Washington, D.C.; Boston; and Los Angeles.

In addition, market and economic conditions in the metropolitan areas in which we derive a substantial portion of our revenue such as New York, San Francisco, Washington, D.C., Boston, and Los Angeles, may have a significant impact on our overall occupancy levels and rental rates and, therefore, our profitability. Furthermore, our business strategy involves continued focus on select core markets, which will increase the impact of the local economic conditions in such markets on our results of operations in future periods. These and other reasons may prevent us from being profitable or from realizing growth or maintaining the value of our real estate properties.

We depend on tenants for our revenue, and lease defaults or terminations, particularly by a significant tenant, could negatively affect our financial condition and results of operations and limit our ability to make distributions to our stockholders.

The success of our investments materially depends on the financial stability of our tenants. A default or termination by a significant tenant on its lease payments to us would cause us to lose the revenue associated with such lease and require us to find an alternative source of revenue to meet debt payments and prevent a foreclosure if the property is subject to a mortgage, could cause us to violate our bank debt covenants, or could impact our credit rating. In the event of a tenant default or bankruptcy, we may experience delays in enforcing our rights as landlord and may incur substantial costs in protecting our investment and re-letting our property. If a tenant defaults on or terminates a significant lease, we may be unable to lease the property for the rent previously received or sell the property without incurring a loss. In addition, significant expenditures for our properties and our Company, such as real estate taxes, insurance and maintenance costs, together with general and administrative costs and debt payments, do not decrease when revenues decrease. Therefore, these events could have a material adverse effect on our results of operations or cause us to reduce the amount of distributions to stockholders.

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As of December 31, 2019, no more than 6% of our 2019 annualized lease revenue was attributable to any individual tenant; however, we have several significant tenants who each account for 2% to 5% of our 2019 annualized lease revenue, and accordingly, any event of bankruptcy, insolvency, or a general downturn in the business of such tenant may result in the failure or delay of the tenant's rental payments, which may have a substantial adverse effect on our operating performance.

We may be unable to integrate the business of Normandy successfully or realize the anticipated synergies and related benefits of our Normandy transaction or do so within the anticipated time frame.

The ongoing integration of the Normandy business into our own will require significant management and resources. We may encounter difficulties in the integration process or in realizing any of the expected benefits from the acquisition, including the following:

•the inability to successfully combine our business and Normandy's business in a manner that permits us to achieve the synergies anticipated to result from the acquisition, which would result in some anticipated benefits of the acquisition not being realized in the time frame currently anticipated or at all;

•the complexities associated with integrating personnel;

•the additional complexities of combining two companies with different histories, cultures, regulatory restrictions, markets, and customer bases;

•lost revenues or tenants as a result of certain tenants' decisions not to do business with us;

•our failure to retain key employees;

•the difficulties associated with integrating information technology systems and intellectual property;

•potential unknown liabilities and unforeseen increased expenses, delays, or regulatory conditions associated with the acquisition; and

•performance shortfalls as a result of the diversion of management's attention caused by completing the acquisition.

For all these reasons, it is possible that the integration process could result in the distraction of our management; the disruption of our ongoing business; or inconsistencies in our services, standards, controls, procedures, and policies; any of which could adversely affect our ability to maintain relationships with tenants, customers, vendors, and employees.

Future acquisitions may fail to perform in accordance with our expectations, may require renovation costs exceeding our estimates or expose us to unknown liabilities.

In the normal course of business, we typically evaluate potential acquisitions, enter into nonbinding letters of intent, and may, at any time, enter into contracts to acquire, develop, or redevelop additional properties. Our properties may fail to perform in accordance with our expectations due to lease-up risk, renovation cost risks, and other factors. In addition, the renovation and improvement costs we incur to bring a property up to market standards may exceed our estimates. We may not have the financial resources to make suitable acquisitions or renovations on favorable terms or at all. The properties we acquire, develop, or redevelop may be subject to liabilities for which we have no recourse, or only limited recourse, against the prior owners or other third parties with respect to unknown liabilities. As a result, if a liability were asserted against us based upon ownership of those properties, we might have to pay substantial sums to settle or contest it, which could adversely affect our results of operations and cash flow. Unknown liabilities with respect to our properties might include:

•liabilities for clean-up of undisclosed environmental contamination;

•claims by tenants, vendors, or other persons against the former owners of the properties;

•liabilities incurred in the ordinary course of business; and

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

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

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The physical effects of climate change could have a material adverse effect on our properties, operations and business. For example, many of our properties are located along the East and West coasts, particularly those in the central business districts of New York, San Francisco, Washington, D.C., Boston and Los Angeles. 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 our inability 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 and increasing the cost of energy at our properties. There can be no assurance that climate change will not have a material adverse effect on our properties, operations or business.

Uninsured losses relating to real property or excessively expensive premiums for insurance coverage could reduce our net income, and materially and adversely affect our business or financial condition.

We may incur losses from time to time that are uninsurable or not economically feasible to insure, or may be insured subject to limitations, such as large deductibles or co-payments. Some of these losses could be catastrophic in nature, such as losses due to earthquakes, acts of terrorism, fire, floods, tornadoes, hurricanes, pollution, wars, or environmental matters. For example, we have properties located in the San Francisco Bay Area of California, an area especially susceptible to earthquakes, and, collectively, these properties represent approximately 34% of our 2019 annualized lease revenue, as described in Item 2, Properties. Because several of these properties are located in close proximity to one another, an earthquake in the San Francisco area could materially damage, destroy, or impair the use by tenants of all of these properties. Furthermore, insurance risks associated with potential terrorist acts could sharply increase the premiums we pay for coverage against property and casualty claims. Additionally, mortgage lenders in some cases insist that commercial property owners purchase coverage against terrorism as a condition of providing mortgage loans. Such insurance policies may not be available at a reasonable cost, if at all, which could inhibit our ability to finance or refinance our properties. In such instances, we may be required to provide other financial support, either through financial assurances or self-insurance, to cover potential losses. In addition, we may not have adequate coverage for losses. If any of our properties incur a loss that is not fully insured, the value of that asset will be reduced by such uninsured loss. Furthermore, other than any working capital reserves or other reserves that we may establish, or our existing line of credit, we do not have additional sources of funding specifically designated for repairs or reconstruction of any of our properties. To the extent we incur significant uninsured losses, or are required to pay unexpectedly large amounts for insurance, our results of operations or financial condition could be adversely affected.

Our insurance providers may default on their obligations to pay claims.

If one or more of our insurance providers were to fail to pay a claim as a result of insolvency, bankruptcy, or otherwise, the nonpayment of such claims could have an adverse effect on our financial condition and results of operations. In addition, if one or more of our insurance providers were to become subject to insolvency, bankruptcy, or other proceedings and our insurance policies with the provider were terminated or canceled as a result of those proceedings, we cannot guarantee that we would be able to find alternative coverage in adequate amounts or at reasonable prices. In such case, we could experience a lapse in any or adequate insurance coverage with respect to one or more properties and be exposed to potential losses relating to any claims that may arise during such period of lapsed or inadequate coverage.

Actual or threatened terrorist attacks, armed hostilities, or contagious disease epidemics affecting our target markets may adversely affect our ability to generate revenues and the value of our properties.

We have significant investments in densely populated metropolitan markets that have been, or may be in the future, negatively impacted by actual or threatened acts of terrorism or contagious disease epidemics, including New York, San Francisco, Washington, D.C., Boston, and Los Angeles. As a result, some tenants in these markets may choose to relocate their businesses to other markets with less population density or to lower-profile office buildings within these markets that may be perceived to be less-likely targets of future terrorist activity. This could result in an overall decrease in the demand for office space in these markets generally or in our properties in particular, which could increase vacancies in our properties or necessitate that we lease our properties on less favorable terms or both. In addition, future terrorist attacks in these markets could directly or indirectly damage our properties, both

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physically and financially, or cause losses that materially exceed our insurance coverage. Attacks, armed conflicts, or diseases could result in increased operating costs, including building security, building systems maintenance, property and casualty insurance, and property maintenance. As a result of terrorist activities and other market conditions, the cost of insurance coverage for our properties could also increase. In addition, our insurance policies may not recover all our property replacement costs and lost revenue resulting from the attack. As a result of the foregoing, our ability to generate revenues and the value of our properties could decline materially.

If we are unable to fund the future capital needs of our properties, cash distributions to our stockholders and the value of our investments could decline.

When tenants do not renew their leases or otherwise vacate their space, we often need to expend substantial funds to improve the vacated space in order to attract replacement tenants. In addition, although we expect that our leases with tenants will require tenants to pay routine property maintenance costs, we will likely be responsible for any major structural repairs, such as repairs to the foundation, exterior walls, and rooftops.

If we need significant capital in the future to improve or maintain our properties or for any other reason, we will have to obtain financing from sources such as cash flow from operations, borrowings, property sales, or future equity offerings. These sources of funding may not be available on attractive terms or at all. If we cannot procure the necessary funding for capital improvements, our investments may generate lower cash flows or decline in value, or both, which would limit our ability to make distributions to our stockholders.

We have incurred and may continue to incur indebtedness, which may increase our business risks.

As of February 3, 2020, our total consolidated indebtedness was approximately $1.4 billion, which includes a $300.0 million term loan, a $150.0 million term loan, and $700.0 million of bonds with fixed interest rates, or with interest rates that are effectively fixed when considered in connection with interest rate swap agreements; and $224.0 million in outstanding borrowings on our line of credit, with a variable interest rate. We may incur additional indebtedness to acquire, develop, or redevelop properties, to fund property improvements and other capital expenditures, to pay our distributions, and for other purposes.

Significant borrowings by us increase the risks of an investment in us. If there is a shortfall between the cash flow from properties and the cash flow needed to service our indebtedness, then the amount available for distributions to stockholders may be reduced. In addition, incurring mortgage debt increases the risk of loss since defaults on indebtedness secured by a property may result in lenders initiating foreclosure actions. In that case, we could lose the property securing the loan that is in default. If any of our properties are foreclosed due to a default, our ability to pay cash distributions to our stockholders will be limited. For tax purposes, a foreclosure of any of our properties would be treated as a sale of the property for a purchase price equal to the outstanding balance of the debt secured by the mortgage. If the outstanding balance of the debt secured by the mortgage exceeds our tax basis in the property, we would recognize taxable income on foreclosure, but we would not receive any cash proceeds. We may give full or partial guarantees to lenders of mortgage debt on behalf of the entities that own our properties. When we give a guaranty on behalf of an entity that owns one of our properties, we are responsible to the lender for satisfaction of the debt if it is not paid by such entity.

If any indebtedness contains cross-collateralization or cross-default provisions, a default on a single loan could affect multiple properties. Our unsecured credit facility (the "Revolving Credit Facility") and our two unsecured term loan facilities each include a cross-default provision that provides that a payment default under any recourse obligation of $50 million or more by us, Columbia OP, or any of our subsidiaries, constitutes a default under the line of credit and term loan facilities.

Increases in interest rates could increase the amount of our debt payments and make it difficult for us to refinance our unsecured bank debt or bonds, or to finance or refinance properties, which could reduce the number of properties we can acquire, develop, or redevelop, our net income, and the amount of cash distributions we can make.

We expect to incur additional indebtedness in the future, which may include term loans, borrowings under a credit facility, unsecured bonds, or mortgages. Increases in interest rates will increase interest costs on our variable-interest debt instruments, which would reduce our cash flows and our ability to pay distributions. If mortgage debt is

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unavailable at reasonable interest rates, we may not be able to finance the purchase of properties. If we place mortgage debt on properties, we run the risk of being unable to refinance the properties when the loans become due, or of being unable to refinance on favorable terms. In addition, if we need to repay existing debt during periods of higher interest rates, we may need to sell one or more of our investments in order to repay the debt, which sale at that time might not permit realization of the maximum return on such investments. If any of these events occur, our ability to refinance some or all of our existing indebtedness may be impacted and our cash flow may be reduced. This, in turn, would reduce cash available for distribution to our stockholders and may hinder our ability to raise capital in the future through additional borrowings or debt or equity offerings. Please refer to Item 7A, Quantitative and Qualitative Disclosures about Market Risk, for additional information regarding interest rate risk.

Changes in the method pursuant to which the LIBOR rates are determined and potential phasing out of LIBOR after 2021 may adversely affect our results of operations.

Our variable-interest debt instruments may use London Interbank Offering Rate ("LIBOR") as a benchmark for establishing the rate. LIBOR is expected to be discontinued at the end of 2021. The anticipated discontinuation of LIBOR will require lenders and their borrowers to transition from LIBOR to an alternative benchmark interest rate, which might increase the cost of our variable-interest debt instruments. At this time, no consensus exists as to what rate or rates may become acceptable alternatives to LIBOR, and it is impossible to predict the effect of any such alternatives on the value of LIBOR-based variable rate loans or other financial arrangements. Uncertainty as to the nature of alternative reference rates and as to potential changes or other reforms to LIBOR may adversely affect LIBOR rates and the value of LIBOR-based loans.

If LIBOR is discontinued as anticipated, or otherwise at our option, our Revolving Credit Facility and term loan facilities provide for alternate interest rate calculations. Any such alternative interest rates may be calculated differently than LIBOR and may increase the interest expense associated with our existing or future indebtedness.

Lenders may require us to enter into restrictive covenants relating to our operations, which could limit our ability to make distributions to our stockholders.

When providing financing, a lender may impose restrictions on us that affect our distribution and operating policies and our ability to incur additional debt. Loan documents we enter into may contain covenants that limit our ability to further mortgage the property or discontinue insurance coverage. These or other limitations may limit our flexibility and our ability to execute on our operating plans.

A downgrade in the credit rating of our debt could materially adversely affect our business and financial condition.

Our senior unsecured debt is rated investment grade by S&P Global Ratings and Moody's Investors Service. In determining our credit ratings, the rating agencies consider a number of both quantitative and qualitative factors, including earnings, fixed charges, cash flows, total debt outstanding, total secured debt, off balance sheet obligations, total capitalization, and various ratios calculated from these factors. The rating agencies also consider predictability of cash flows, business strategy, joint venture activity, property development risks, industry conditions, and contingencies. Therefore, any deterioration in our operating performance could cause our investment-grade rating to come under pressure. Our corporate credit rating at S&P Global Ratings is currently "BBB" with a stable outlook, and our corporate credit rating at Moody's Investor Service is currently "Baa2" with a stable outlook. There can be no assurance that our credit ratings will not be lowered or withdrawn in their entirety. A negative change in our ratings outlook or any downgrade in our current investment-grade credit ratings by rating agencies could adversely affect our cost and access to sources of liquidity and capital. Additionally, a downgrade could, among other things, increase the costs of borrowing under our credit facility and term loans, adversely impact our ability to obtain unsecured debt or refinance our unsecured debt on competitive terms in the future, or require us to take certain actions to support our obligations, any of which would adversely affect our business and financial condition.

We face risks relating to the occurrence of cyber incidents, or a deficiency in our cybersecurity, which could negatively impact our business by causing a disruption to our operations, a compromise of confidential information, and/or damage to our business relationships.

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A cyber incident is considered to be any adverse event that threatens the confidentiality, integrity, or availability of our information resources. More specifically, a cyber incident is an intentional attack or an unintentional event that can include gaining unauthorized access to systems to disrupt operations, corrupt data, or steal confidential information. A breach of our privacy or information security systems or our tenants' privacy or information security systems, particularly through cyber attacks or cyber intrusion, could materially adversely affect our business and financial condition. Privacy and information security risks have generally increased in recent years because of the proliferation of new technologies and the increased sophistication and activities of perpetrators of cyber attacks. As our reliance on technology has increased, so have the risks of cyber attacks to our systems, both internal and those we have outsourced. Cyber attacks can be both individual and highly organized attempts planned by very sophisticated hacking organizations. Risks that could directly result from the occurrence of a cyber incident include operational interruption, damage to our relationships with our tenants, potential errors from misstated financial reports, missed reporting deadlines, violations of loan covenants, inability to comply with laws and regulations and private data exposure, among others. Any or all of the preceding risks could have a material adverse effect on our results of operations, financial condition, and cash flows.

We employ a number of measures to prevent, detect, and mitigate these threats, which include dual factor authentication, frequent password change events, firewall detection systems, frequent backups, a redundant data system for core applications, and annual breach testing. While, to date, we have not had a significant cyber breach or attack that has had a material impact on our business or results of operations, there can be no assurance that our efforts to maintain the security and integrity of our systems will be effective, or that we will be able to maintain our systems free from security breaches or other operational interruptions.

A cybersecurity attack could compromise the confidential information of our employees, customers, and vendors. A successful attack could disrupt and affect our business operations, damage our reputation, and result in significant remediation and litigation costs. Further, one or more of our tenants could experience a cyber incident which could impact their operations and ability to perform under the terms of their lease with us. While we maintain insurance coverage that may, subject to policy terms and conditions including deductibles, cover specific aspects of cyber risks, such insurance coverage may be insufficient to cover all losses. As cyber threats continue to evolve, we may be required to expend additional resources to continue to enhance our information security measures and to investigate and remediate any information security vulnerabilities.

We are and may continue to be subject to litigation, which could have a material adverse effect on our financial condition.

We currently are, and are likely to continue to be, subject to a variety of claims arising in the ordinary course of business. Such claims could include personal injury claims, contract claims, and claims alleging violations of federal and state law regarding workplace and employment matters, discrimination, and similar matters. Some of these claims may result in significant defense costs and potentially significant judgments against us, some of which are not, or cannot be, insured against. Although we defend ourselves against any such claims, we cannot be certain of the ultimate outcomes of currently asserted claims or of those that arise in the future. Resolution of these types of matters against us may result in our having to pay significant fines, judgments, or settlements, which, if uninsured, or if the fines, judgments, and settlements exceed insured levels, would adversely impact our earnings and cash flows, thereby impacting our ability to service debt and make distributions to our stockholders.

Costs of complying with governmental laws and regulations may reduce our net income and the cash available for distributions to our stockholders.

All real property and the operations conducted on real property are subject to federal, state, and local laws and regulations relating to environmental protection and human health and safety. Some of these laws and regulations may impose joint and several liability on tenants, owners, or operators for the costs to investigate or remediate contaminated properties, regardless of fault or whether the acts causing the contamination were legal. In addition, the presence of hazardous substances, or the failure to properly remediate these substances, may hinder our ability to sell, rent, or pledge such property as collateral for future borrowings.

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Compliance with new laws or regulations such as the New York Climate Mobilization Act, or stricter interpretation of existing laws, may require us to incur material expenditures. Future laws, ordinances, or regulations may impose material environmental liability. Additionally, our tenants' operations, the existing condition of land when we buy it, operations in the vicinity of our properties, such as the presence of underground storage tanks or activities of unrelated third parties may affect our properties. Furthermore, there are various local, state, and federal regulatory requirements, such as fire, health, life-safety, and similar regulations, and the Americans with Disabilities Act, with which we may be required to comply, and which may subject us to liability in the form of fines or damages for noncompliance. Any material expenditures, fines, or damages we must pay would adversely impact our earnings and cash flows, thereby impacting our ability to service debt and make distributions to our stockholders.

Compliance or failure to comply with the Americans with Disabilities Act or other safety regulations and requirements could result in substantial costs.

The Americans with Disabilities Act generally requires that certain buildings, including office buildings, be made accessible to disabled persons. Noncompliance could result in the imposition of fines by the federal government or the award of damages to private litigants. If, under the Americans with Disabilities Act, we are required to make substantial alterations and capital expenditures in one or more of our properties, including the removal of access barriers, it could adversely impact our earnings and cash flows, thereby impacting our ability to service debt and make distributions to our stockholders.

Our properties are subject to various federal, state, and local regulatory requirements, such as state and local fire and life safety requirements. If we fail to comply with these requirements, we could incur fines or private damage awards. We do not know whether existing requirements will change or whether compliance with future requirements will require significant unanticipated expenditures that will affect our cash flow and results of operations.

Discovery of previously undetected environmentally hazardous conditions may decrease our revenues and limit our ability to make distributions.

Under various federal, state, and local environmental laws, ordinances, and regulations, a current or previous real property owner or operator may be liable for the cost to remove or remediate hazardous or toxic substances on, under, or in such property. These costs could be substantial. Such laws often impose liability whether or not the owner or operator knew of, or was responsible for, the presence of such hazardous or toxic substances. Environmental laws also may impose restrictions on the manner in which property may be used or businesses may be operated, and these restrictions may require substantial expenditures or prevent us from entering into leases with prospective tenants that may be impacted by such laws. Environmental laws provide for sanctions for noncompliance and may be enforced by governmental agencies or, in certain circumstances, by private parties. Certain environmental laws and common law principles could be used to impose liability for release of and exposure to hazardous substances, including asbestos-containing materials. Third parties may seek recovery from real property owners or operators for personal injury or property damage associated with exposure to released hazardous substances. The cost of defending against claims of liability, of complying with environmental regulatory requirements, of remediating any contaminated property, or of paying personal injury claims could have an adverse impact on our business and results of operations.

Property ownership through joint ventures may limit our ability to act exclusively in our interest.

We have entered into seven joint venture arrangements and in the future may acquire, develop, or redevelop properties in, or contribute properties to, joint ventures with other persons or entities when we believe circumstances warrant the use of such structures. We could become engaged in a dispute with one or more of our joint venture partners, which might affect our ability to operate a jointly owned property. Moreover, joint venture partners may have business, economic, or other objectives that are inconsistent with our objectives, including objectives that relate to the appropriate timing and terms of any sale or refinancing of a property. In some instances, joint venture partners may have competing interests in our markets that could create conflicts of interest. Also, our joint venture partners might refuse to make capital contributions when due, and we may be responsible to our partners for indemnifiable losses. We and our partners may each have the right to trigger a buy-sell arrangement,

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which could cause us to sell our interest, or acquire our partners' interest, at a time when we otherwise would not have initiated such a transaction and may result in the valuation of our interest in the joint venture (if we are the seller) or of the other partner's interest in the joint venture (if we are the buyer) at levels which may not be representative of the valuation that would result from an arm's-length marketing process. We are also subject to the following risks, the likelihood of which may be higher when our joint venture partner is an institutional owner and required to aggregate approvals from multiple beneficial owners: (i) a deadlock if we and our joint venture partner are unable to agree upon certain major and other decisions, (ii) the limitation of our ability to liquidate our position in the joint venture without the consent of the other joint venture partner, and (iii) the requirement to provide guarantees in favor of lenders with respect to the indebtedness of the joint venture.

If we sell properties and provide financing to purchasers, defaults by the purchasers would decrease our cash flows and limit our ability to make distributions.

In some instances we may sell our properties by providing financing to purchasers. When we provide financing to purchasers, we will bear the risk that the purchaser may default, which could negatively impact our liquidity and results of operations. Even in the absence of a purchaser default, the distribution of the proceeds of sales to our stockholders, or the reinvestment of proceeds in other assets, will be delayed until the promissory notes or other property we may accept upon a sale are actually paid, sold, refinanced, or otherwise disposed.

We are dependent on our executive officers and employees, and competition for skilled personnel could increase our compensation costs.

We rely on a small number of persons, particularly our executive officers, to carry out our business and investment strategies. Any of our senior management, including our executive officers, may cease to provide services to us at any time. The loss of the services of any of our key management personnel or our inability to recruit and retain qualified personnel in the future, could have an adverse effect on our business and financial results. Further, we compete with various other companies in attracting and retaining qualified and skilled personnel, which may require us to enhance our pay and benefits packages to compete effectively for such personnel. We will continue to try to attract and retain qualified additional senior management and other employees, but may not be able to do so on acceptable terms.

If our disclosure controls or internal control over financial reporting are not effective, investors could lose confidence in our reported financial information, which could adversely affect the perception of our business and the trading price of our common stock.

Section 404 of the Sarbanes-Oxley Act of 2002 requires that we evaluate the effectiveness of our internal control over financial reporting as of the end of each fiscal year and to include a management report assessing the effectiveness of our internal control over financial reporting. Deficiencies, including any material weakness, in our internal control over financial reporting that may occur in the future could result in misstatements of our results of operations, restatements of our financial statements, a decline in the trading price of our common stock, or otherwise materially adversely affect our business, reputation, results of operations, financial condition, or liquidity.

We may incur impairment charges.

We evaluate on a quarterly basis our real estate portfolios for indicators of impairment. Impairment charges reflect management's judgment of the probability and severity of the decline in the value of real estate assets and investments we own. These charges and provisions may be required in the future as a result of factors beyond our control, including, among other things, changes in our expected holding periods, changes in the economic environment and market conditions affecting the value of real property assets, or natural or man-made disasters. If we are required to take impairment charges, our results of operations could be adversely impacted.

Our entry into the investment advisory business subjects us to a variety of risks associated with investment performance and advisory services.

On January 24, 2020, we completed the acquisition of Normandy Real Estate Management, LLC, which is a registered investment advisor ("RIA") that provides investment management services, among other things. As a result, the

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newly acquired investment advisory business will continue to be registered as an RIA with the SEC under the Investment Advisers Act of 1940, as amended (the "Advisers Act"). Federally registered investment advisers are regulated and subject to examination by the SEC. Additionally, the Advisers Act imposes numerous obligations on RIAs, including fiduciary duties, disclosure obligations, recordkeeping and reporting requirements, marketing restrictions, and general anti-fraud prohibitions. Our failure to comply with the Advisers Act and associated rules and regulations promulgated by the SEC could subject us to enforcement proceedings and sanctions for violations, including censure or termination of SEC registration, litigation, and reputational harm. In addition, our investment advisory business is subject to state laws and regulations.

Additionally, poor investment returns and declines in client assets in our investment advisory business, due to either general market conditions or under-performance (relative to our competitors or to benchmarks) by investment products, may affect our ability to retain existing assets, prevent clients from transferring their assets out of products or their accounts, or inhibit our ability to attract new clients or additional assets from existing clients. Any such poor performance could adversely affect our investment advisory business and the advisory fees that we earn on client assets.

Conflicts of interest, or the appearance of conflicts of interest, may arise because certain of our directors and officers are also affiliated with interests that may directly compete with us in the future.

Conflicts of interest, or the appearance of conflicts of interest, could arise between our interests and the interests of the other entities and business activities in which our directors or officers are involved. For example, in connection with our acquisition of Normandy, certain of our officers and directors retain interests in assets or funds that were excluded from the acquisition that may in the future compete with our business in certain markets or in complimentary business lines once they are no longer subject to non-compete obligations. In such cases, the interests of such directors and officers may not be aligned with our own in all respects. Furthermore, we are involved in business arrangements in which both we, on the one hand, and entities or funds formerly affiliated with Normandy, on the other hand, are joint venture partners. Conflicts of interests, or the appearance of conflicts of interests, could arise in that context as we now control and have duties on behalf of both joint venture partners. While our contractual arrangements place restrictions on the parties' conduct in certain situations, and related party transactions are subject to independent review and approval in accordance with our related party transaction approval procedures and applicable law, the potential for a conflict of interest exists and such persons may have conflicts of interest, or the appearance of conflicts of interest, with respect to these matters.

Risks Related to Ownership of Our Common Stock

We may be unable to pay or maintain cash distributions or increase distributions over time, which could reduce the funds we have available for investment and the return to our investors.

There are many factors that can affect the availability and timing of distributions to stockholders. We expect to continue to fund distributions principally from cash flow from operations; however, from time to time we may elect to fund a portion of our distributions from borrowings. If we fund distributions from financings, we will have fewer funds available for the investment in, and acquisition of, properties; thus, the overall return to our investors may be reduced. We can give no assurance that we will be able to pay or maintain cash distributions or increase distributions over time. Our ability to make distributions in the future will depend on several factors, many of which may be beyond our control, including:

•the operational and financial performance of our properties;

•capital expenditures with respect to existing, developed, and newly acquired properties;

•general and administrative costs associated with our operation as a publicly held REIT;

•the amount of, and the interest rates on, our debt; and

•potential significant expenditures relating to environmental and other regulatory matters.

Our stock price may be volatile or may decline regardless of our operating performance, and may impede our stockholders' ability to sell their shares at a desirable price.

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The market price of our common stock may vary significantly in response to a number of factors, most of which we cannot control, including those described under this section and the following:

•changes in capital market conditions that could affect valuations of real estate companies in general or other adverse economic conditions;

•our failure to meet any earnings estimates or expectations;

•future sales of our common stock by our officers, directors, and significant stockholders;

•global economic, legal, and regulatory factors unrelated to our performance;

•investors' perceptions of our prospects;

•announcements by us or our competitors of significant contracts, acquisitions, joint ventures, or capital commitments; and

•investor perceptions of the investment opportunity associated with our common stock relative to other investment alternatives.

In addition, from time to time, the New York Stock Exchange (the "NYSE"), has experienced extreme price and volume fluctuations that have affected the market prices of equity securities of many real estate companies. In the past, stockholders have instituted securities class action litigation following periods of market volatility. If we were involved in securities litigation, we could incur substantial costs, and our resources and the attention of management could be diverted from our business. Furthermore, we currently have limited research coverage by securities and industry analysts. If additional securities or industry analysts do not commence coverage of our Company, the long-term trading price for our common stock could be negatively impacted. If one or more of present or future analysts who cover us downgrade our common stock or publish inaccurate or unfavorable research about our business, our stock price would likely decline. If one or more of these analysts cease coverage of us or fail to publish reports on us regularly, demand for our common stock could decrease, which could cause our stock price and trading volume to decline.

Further issuances of equity securities may be dilutive to current stockholders.

The interests of our existing stockholders could be diluted if additional equity securities are issued to finance future acquisitions, developments, or redevelopments, or to repay indebtedness. Our ability to execute our business strategy depends on our access to an appropriate blend of debt financing, including unsecured lines of credit and other forms of secured and unsecured debt, and equity financing.

Our charter limits the number of shares a person may own, which may discourage a takeover that could otherwise result in a premium price to our stockholders.

Our charter, with certain exceptions, authorizes our directors to take such actions as are necessary and desirable to preserve our qualification as a REIT. Unless exempted by our board of directors, no person may own more than 9.8% of our outstanding common stock. This restriction may have the effect of delaying, deferring, or preventing a change in control, including an extraordinary transaction (such as a merger, tender offer, or sale of all or substantially all of our assets) that might provide a premium price for holders of our common stock.

Our organizational documents contain provisions that may discourage a takeover of us and could depress the price of our shares of common stock.

Our organizational documents contain provisions that may discourage a takeover of us and could depress the price of our common stock. Our organizational documents contain provisions that may have an anti-takeover effect, inhibit a change of our management, or inhibit, in certain circumstances, tender offers for our common stock or proxy contests to change our board. These provisions include: ownership limits and restrictions on transferability that are intended to enable us to continue to qualify as a REIT; broad discretion of our board to take action, without stockholder approval, to issue new classes of securities that may discourage a third party from acquiring us; the ability, through board action or bylaw amendment to opt in to certain provisions of Maryland law that may impede efforts to effect a change in control of us; advance notice requirements for stockholder proposals and stockholder nominations of directors; and the absence of cumulative voting rights.

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In addition, our board of directors may classify or reclassify any unissued preferred stock and establish the preferences; conversion; or other rights, voting powers, restrictions, or limitations as to distributions, qualifications, and terms or conditions of redemption of any such stock. Thus, our board of directors could authorize the issuance of preferred stock with terms and conditions that could have priority as to distributions and amounts payable upon liquidation over the rights of the holders of our common stock. Such preferred stock could also have the effect of delaying, deferring, or preventing a change in control of us, including an extraordinary transaction (such as a merger, tender offer, or sale of all or substantially all of our assets) that might provide a premium price to holders of our common stock.

Maryland General Corporation Law provides certain protections relating to deterring or defending hostile takeovers, which may discourage others from trying to acquire control of us and may prevent our stockholders from receiving a premium price for their stock in connection with a business combination.

Our board of directors has determined to opt out of certain provisions of Maryland law that may impede efforts to effect a change in control of us as further described below; in the case of the business combination provisions of Maryland law, by resolution of our board of directors; in the case of the control share provisions of Maryland law, pursuant to a provision in our bylaws; and in the case of certain provisions of the Maryland Unsolicited Takeover Act, pursuant to Articles Supplementary. Only upon stockholder approval of an amendment to our Articles of Incorporation may our board of directors repeal the foregoing opt-outs from the anti-takeover provisions of Maryland General Corporation Law.

Under Maryland law, "business combinations" between a Maryland corporation and certain interested stockholders or affiliates of interested stockholders 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, share exchange, or, in circumstances specified in the statute, an asset transfer or issuance or reclassification of equity securities. Also under Maryland law, control shares of a Maryland corporation acquired in a control share acquisition have no voting rights except to the extent approved by a vote of two-thirds of the votes entitled to be cast on the matter. Shares owned by the acquirer, an officer of the corporation, or an employee of the corporation who is also a director of the corporation are excluded from the vote on whether to accord voting rights to the control shares. These provisions may therefore discourage others from trying to acquire control of us and increase the difficulty of consummating any offer. Similarly, provisions of Title 3, Subtitle 8 of the Maryland General Corporation Law, commonly referred to as the "Maryland Unsolicited Takeover Act," could provide similar anti-takeover protection.

Corporate responsibility, specifically related to environmental, social and governance factors (“ESG”), may impose additional costs and expose us to new risks.

The importance of sustainability evaluations is becoming more broadly accepted by investors and shareholders. Certain organizations that provide corporate governance and other corporate risk information to investors and shareholders have developed scores and ratings to evaluate companies and investment funds based upon environmental, social and governance (“ESG”) or “sustainability” metrics. Many investment funds focus on positive ESG business practices and sustainability scores when making investments and may consider a company’s sustainability score as a reputational or other factor in making an investment decision. In addition, investors, particularly institutional investors, use these scores to benchmark companies against their peers and if a company is perceived as lagging, these investors may engage with companies to require improved ESG disclosure or performance. We may face reputational damage in the event our corporate responsibility procedures or standards do not meet the standards set by various constituencies. A low sustainability score could result in a negative perception of the Company, or exclusion of our common stock from consideration by certain investors.

Federal Income Tax Risks

Failure to qualify as a REIT would reduce our net income and cash available for distributions.

Our qualification as a REIT depends upon our ability to meet requirements regarding our organization and ownership, distributions of our income, the nature and diversification of our income and assets, and other tests

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imposed by the Internal Revenue Code (the "Code"). The fact that we hold a substantial amount of our assets through Columbia OP and its subsidiaries and real estate ventures further complicates the application of the REIT requirements for us. If we fail to qualify as a REIT for any taxable year, we will be subject to federal and state income tax on our taxable income at corporate rates, including interest and any applicable penalties. In addition, we would generally be disqualified from treatment as a REIT for the four taxable years following the year of losing our REIT status. Losing our REIT status would reduce our net earnings available for investment or distribution to stockholders because of the additional tax liability. In addition, distributions to stockholders would no longer qualify for the dividends-paid deduction, and we would no longer be required to make distributions. If this occurs, we might be required to borrow funds or liquidate some investments in order to pay the applicable tax.

Recharacterization of sale-leaseback transactions may cause us to lose our REIT status, which would reduce the return to our stockholders.

We may purchase properties and lease them back to the sellers of such properties. While we will use our best efforts to structure any such sale-leaseback transaction such that the lease will be characterized as a "true lease," thereby allowing us to be treated as the owner of the property for federal income tax purposes, we can give no assurance that the Internal Revenue Service will not challenge such characterization. In the event that any such sale-leaseback transaction is challenged and recharacterized as a financing transaction or loan for federal income tax purposes, deductions for depreciation and cost recovery relating to such property would be disallowed. If a sale-leaseback transaction were so recharacterized, we might fail to satisfy the REIT qualification asset tests or income tests and, consequently, lose our REIT status. Alternatively, the amount of our REIT taxable income could be recalculated, which might also cause us to fail to meet the distribution requirement for a taxable year.

Failure of Columbia OP to be treated as a disregarded entity or a partnership would have serious adverse consequences to our stockholders.

If the IRS were to successfully challenge the tax status of the Columbia OP or any of its subsidiary partnerships or real estate ventures for federal income tax purposes, the Columbia OP or the affected subsidiary partnership or real estate venture would be taxable as a corporation. In such event, we would cease to qualify as a REIT and the imposition of a corporate tax on the Columbia OP, subsidiary partnership, or real estate venture would reduce the amount of cash available for distribution from the Columbia OP to us and ultimately to our stockholders.

Even if we qualify as a REIT for federal income tax purposes, we may be subject to other tax liabilities that reduce our cash flow and our ability to make distributions to our stockholders.

Even if we remain qualified as a REIT for federal income tax purposes, we may be subject to some federal, state, and local taxes on our income or property. For example:

•In order to qualify as a REIT, we must distribute annually at least 90% of our REIT taxable income to our stockholders (which is determined without regard to the dividends-paid deduction or net capital gain). To the extent that we satisfy the distribution requirement but distribute less than 100% of our REIT taxable income, we will be subject to federal and state corporate income tax on the undistributed income.

•We will be subject to a 4% nondeductible excise tax on the amount, if any, by which distributions we pay in any calendar year are less than the sum of 85% of our ordinary income, 95% of our capital gains net income, and 100% of our undistributed income from prior years.

•If we have net income from the sale of foreclosure property that we hold primarily for sale to customers in the ordinary course of business or other nonqualifying income from foreclosure property, we must pay a tax on that income at the highest corporate income tax rate.

•If we sell a property, other than foreclosure property, that we hold primarily for sale to customers in the ordinary course of business, our gain would be subject to the 100% "prohibited transaction" tax.

•We may perform additional, noncustomary services for tenants of our buildings through our taxable REIT subsidiary, including real estate or non-real-estate-related services; however, any earnings related to such services are subject to federal and state income taxes.

Legislation that modifies the rules applicable to partnership tax audits may affect us.

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The Bipartisan Budget Act of 2015, effective for taxable years beginning after December 31, 2017, requires Columbia OP (with respect to any period when it is classified as a partnership and not a disregarded entity for federal income tax purposes) and any subsidiary partnership to pay the hypothetical increase in partner-level taxes (including interest and penalties) resulting from an adjustment of partnership tax items on audit or in other tax proceedings, unless the partnership elects an alternative method under which the taxes resulting from the adjustment (and interest and penalties) are assessed at the partner level. Many uncertainties remain as to the application of these rules, including the application of the alternative method to partners that are REITs, and the impact they will have on us. However, it is possible that partnerships in which we invest may be subject to U.S. federal income tax, interest, and penalties in the event of a U.S. federal income tax audit as a result of these law changes.

Legislative or regulatory action could adversely affect investors.

In recent years, numerous legislative, judicial, and administrative changes have been made in the provisions of federal and state income tax laws applicable to investments similar to an investment in our shares. In particular, the comprehensive tax reform legislation enacted in December 2017 and commonly known as the Tax Cuts and Jobs Act, or TCJA, made many significant changes to the U.S. federal income tax laws that will profoundly impact the taxation of individuals and corporations (including both regular C corporations and corporations that have elected to be taxed as REITs). A number of changes that affect noncorporate taxpayers will expire at the end of 2025 unless Congress acts to extend them. These changes will impact us and our stockholders in various ways, some of which are adverse or potentially adverse compared to prior law. Although the IRS has issued guidance with respect to many of the new provisions, there are numerous interpretive issues that will require further guidance. Technical corrections legislation may be needed to clarify certain aspects of the new law and give proper effect to Congressional intent. There can be no assurance, however, that technical clarifications or changes needed to prevent unintended or unforeseen tax consequences will be enacted by Congress in the near future. Additional changes to tax laws are likely to continue to occur in the future, and we cannot assure investors that any such changes will not adversely affect the taxation of our stockholders. Any such changes could have an adverse effect on an investment in shares or on the market value or the resale potential of our properties. Investors are urged to consult with their own tax advisor with respect to the impact of recent legislation on ownership of shares and the status of legislative, regulatory, or administrative developments and proposals, and their potential effect on ownership of shares.

To maintain our REIT status, we may be forced to borrow funds or dispose of assets during unfavorable market conditions to make distributions to our stockholders, which could increase our operating costs and decrease the value of an investment in us.

We intend to make distributions to our stockholders to comply with the requirements of the Code for REITs and to minimize or eliminate our corporate tax obligations; however, differences between the recognition of taxable income and the actual receipt of cash could require us to sell assets or borrow funds on a short-term or long-term basis to meet the distribution requirements of the Code. Certain types of assets generate substantial disparity between taxable income and available cash, such as real estate that has been financed through financing structures which require some or all of available cash flows to be used to service borrowings. In addition, changes made by TCJA will require us to accrue certain income for U.S. federal income tax purposes no later than when such income is taken into account as revenue on our financial statements (subject to an exception for certain income that is already subject to a special method of accounting under the Internal Revenue Code). This could cause us to recognize taxable income prior to the receipt of the associated cash. TCJA also includes limitations on the deductibility of certain compensation paid to our executives, certain interest payments, and certain net operating loss carryforwards, each of which could potentially increase our taxable income and our required distributions. As a result, the requirement to distribute a substantial portion of our taxable income could cause us to: (1) sell assets in adverse market conditions, (2) borrow on unfavorable terms, or (3) distribute amounts that would otherwise be invested in future acquisitions, capital expenditures, or repayment of debt, in order to comply with REIT requirements. Any such actions could increase our costs and reduce the value of our common stock. Further, we may be required to make distributions to our stockholders when it would be more advantageous to reinvest cash in our business or when we do not have funds readily available for distribution. Compliance with REIT qualification requirements may, therefore, hinder our ability to operate solely on the basis of maximizing profits.

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Dividends payable by REITs do not qualify for the reduced tax rates available for some dividends.

The maximum federal tax rate (not including the Medicare Contribution Tax on unearned income) applicable to income from "qualified dividends" payable to U.S. stockholders that are individuals, trusts, and estates is 20%. Dividends payable by REITs, however, generally are not eligible for the 20% rate. However, under the TCJA, for taxable years beginning after December 31, 2017 and before January 1, 2026, individuals, trusts, and estates generally may deduct up to 20% of ordinary REIT dividends. Although these rules do not adversely affect the taxation of REITs or dividends payable by REITs, investors who are individuals, trusts, and estates may perceive investments in REITs to be relatively less attractive than investments in the stocks of non-REIT corporations that pay dividends.

To maintain our REIT status, we may be forced to forego otherwise attractive opportunities, which could delay or hinder our ability to meet our investment objectives and lower the return to our stockholders.

To qualify as a REIT, we must satisfy tests on an ongoing basis concerning, among other things, the sources of our income, the nature of our assets, and the amounts we distribute to our stockholders. We may be required to make distributions to stockholders at times when it would be more advantageous to reinvest cash in our business or when we do not have funds readily available for distribution. Compliance with the REIT requirements may hinder our ability to operate solely on the basis of maximizing profits.

If a transaction intended to qualify as a Section 1031 Exchange is later determined to be taxable, or if we are unable to identify and complete the acquisition of suitable replacement property to effect a Section 1031 Exchange, we may face adverse consequences.

From time to time we may seek to dispose of properties in transactions that are intended to qualify as tax-deferred "like-kind exchanges" under Section 1031 of the Code (a "Section 1031 Exchange"). It is possible that the qualification of a transaction as a Section 1031 Exchange could be successfully challenged and determined to be currently taxable. It is also possible that we are unable to identify and complete the acquisition of suitable replacement property to effect a Section 1031 Exchange. In any such case, our taxable income and earnings and profits would increase. This could increase the dividend income to our stockholders by reducing any return of capital they received. In some circumstances, we may be required to pay additional dividends or, in lieu of that, corporate income tax, possibly including interest and penalties. As a result, we may be required to borrow funds in order to pay additional dividends or taxes, and the payment of such taxes could cause us to have less cash available to distribute to our stockholders. In addition, if a Section 1031 Exchange were later to be determined to be taxable, we may be required to amend our tax returns for the applicable year in question, including any information reports we sent our stockholders. Moreover, it is possible that legislation could be enacted that could modify or repeal the laws with respect to Section 1031 Exchanges, which could make it more difficult or not possible for us to dispose of properties on a tax deferred basis.

Further, as a result of changes made by the TCJA, like-kind exchanges are only permitted with respect to real property. The changes generally apply to exchanges completed after December 31, 2017, unless the property was disposed of or received in the exchange on or before such date. If a material amount of personal property is associated with the real property that we have disposed of in a like-kind exchange, the like-kind exchange provisions will be less beneficial than under prior law.

We face possible adverse state local tax audits and changes in state and local tax law.

Because Columbia Property Trust operates as a REIT, it is generally not subject to federal income taxes, but we are subject to certain state and local taxes. From time to time, changes in state and local tax laws or regulations are enacted, which may result in an increase in our tax liability. A shortfall in tax revenues for states and municipalities in which we operate may lead to an increase in the frequency and size of such changes. If such changes occur, we may be required to pay additional taxes on our assets or income. These increased tax costs could adversely affect our financial condition and results of operations and the amount of cash available for the payment of dividends and distributions to our security holders.

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ITEM 1B.UNRESOLVED STAFF COMMENTS

Not applicable.

ITEM 2.PROPERTIES

Overview

As of December 31, 2019, we owned 17 operating properties and three properties under development or redevelopment, of which 13 were wholly owned and seven were owned through joint ventures. These properties are located primarily in New York, San Francisco, and Washington, D.C. and were approximately 97.1% leased as of December 31, 2019.

Property Statistics

The tables below include statistics for the 12 consolidated operating properties, which we own directly, and our proportional share of the annualized lease revenue and rentable square feet for the five operating properties we own through consolidated and unconsolidated joint ventures. 2019 annualized lease revenue is an operating metric, calculated as (i) annualized rental payments (defined as base rent plus operating expense reimbursements, excluding rental abatements) for executed and commenced leases as of December 31, 2019, as well as leases executed but not yet commenced for vacant space that will commence within 12 months, and (ii) annualized parking revenues, payable either under the terms of an executed lease or vendor contract ("2019 Annualized Lease Revenue"). 2019 Annualized Lease Revenue excludes rental payments for executed leases that have not yet commenced for space covered by an existing lease.

The following table shows lease expirations of our office properties as of December 31, 2019, during each of the next 10 years and thereafter. This table assumes no exercise of renewal options or termination rights. 

Year of Lease Expiration	Rentable Square Feet (in thousands)	2019 Annualized Lease Revenue (in thousands)		Percentage of 2019 Annualized Lease Revenue
Vacant	179	$	—	—	%
2020	129	10,012		3	%
2021	517	31,033		8	%
2022	445	25,534		7	%
2023	456	36,818		10	%
2024	322	27,703		8	%
2025	704	52,922		14	%
2026	818	44,024		12	%
2027	203	16,292		4	%
2028	92	7,445		2	%
2029	238	18,833		5	%
Thereafter	1,985	97,884		27	%
	6,088	$	368,500	100	%

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The following table shows the geographic locations of our office properties as of December 31, 2019. For more information about our geographic locations, see Note 15, Segment Information, of the accompanying consolidated financial statements.

Location	Leased Square Feet (in thousands)	2019 Annualized Lease Revenue (in thousands)		Percentage of 2019 Annualized Lease Revenue
New York	2,031	$	143,493	39	%
San Francisco	1,675	124,381		34	%
Washington, D.C.	860	60,498		16	%
Boston	272	16,308		4	%
Los Angeles	247	8,825		2	%
All other markets	824	14,995		5	%
	5,909	$	368,500	100	%

The following table shows the industry breakdown of our office tenants as of December 31, 2019.

Industry	Leased Square Feet (in thousands)	2019 Annualized Lease Revenue (in thousands)		Percentage of 2019 Annualized Lease Revenue
Business Services	1,212	$	97,067	26	%
Depository Institutions	889	39,542		11	%
Engineering & Management Services	481	29,417		8	%
Nondepository Institutions	392	26,363		7	%
Legal Services	269	24,222		7	%
Security & Commodity Brokers	201	16,642		5	%
Electric, Gas & Sanitary Services	841	16,470		4	%
Real Estate	237	15,114		4	%
Holding and Other Investment Offices	118	8,260		2	%
Insurance Agents, Brokers & Service	121	7,399		2	%
Other(1)	1,148	88,004		24	%
	5,909	$	368,500	100	%

⁽¹⁾No more than 2% of 2019 Annualized Lease Revenue is attributable to any individual industry.

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The following table shows the major tenants of our operating properties as of December 31, 2019.

Tenant	2019 Annualized Lease Revenue (in thousands)		Percentage of 2019 Annualized Lease Revenue
Pershing	$	18,712	5	%
Twitter	17,398		5	%
Wells Fargo	15,658		4	%
Yahoo!	15,142		4	%
Westinghouse Electric	14,995		4	%
DocuSign	12,751		3	%
Snap	12,385		3	%
WeWork	7,954		2	%
DLA Piper	7,552		2	%
Other(1)	245,953		68	%
	$	368,500	100	%

⁽¹⁾No more than 2% of 2019 Annualized Lease Revenue is attributable to any individual tenant.

ITEM 3.  LEGAL PROCEEDINGS

From time to time, we are party to legal proceedings, which arise in the ordinary course of our business. We are not currently involved in any legal proceedings of which the outcome is reasonably likely to have a material adverse effect on our results of operations or our financial condition, nor are we aware of any such legal proceedings contemplated by governmental authorities.

ITEM 4.  MINE SAFETY DISCLOSURES

Not applicable.

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PART II

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

Market Information and Holders

Our common stock was listed on the NYSE on October 10, 2013 under the symbol "CXP." As of January 31, 2020, we had approximately 115.2 million shares of common stock outstanding held by approximately 43,400 stockholders of record.

Distributions

We intend to make distributions each taxable year (not including a return of capital for federal income tax purposes) equal to at least 90% of our taxable income. One of our primary goals is to pay regular quarterly distributions to our stockholders. The amount of distributions paid and the taxable portion thereof in prior periods are not necessarily indicative of amounts anticipated in future periods.

The amount of distributions to common stockholders is determined by our board of directors and is dependent upon a number of factors, including funds deemed available for distribution, based principally on our current and future projected operating cash flows reduced by capital requirements necessary to maintain our existing portfolio, our future capital needs, our future sources of liquidity, and the annual distribution requirements necessary to maintain our status as a REIT under the Code. Investments in new property acquisitions and first-generation capital improvements, as well as equity repurchases, are generally funded with recycled capital proceeds from property sales, debt, or cash on hand. Our board of directors maintained a $0.20 dividend for the first three quarters of 2019 and declared a $0.21 dividend for the fourth quarter of 2019, which was paid on January 7, 2020.

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Performance Graph

The following graph compares the cumulative total return of our common stock with the S&P 500 Index, Morgan Stanley REIT Index, the FTSE NAREIT US Real Estate Index, and the FTSE NAREIT Equity Office Index for the period beginning on December 31, 2014 through December 31, 2019. The graph assumes a $100.00 investment in each of the indices on December 31, 2014, and the reinvestment of all dividends.

Index	December 31, 2014		December 31, 2015		December 31, 2016		December 31, 2017		December 31, 2018		December 31, 2019
Columbia Property Trust	$	100.00	$	97.23	$	94.56	$	104.17	$	91.06	$	102.23
S&P 500 Index	$	100.00	$	101.37	$	113.49	$	138.26	$	132.19	$	173.80
Morgan Stanley REIT Index	$	100.00	$	102.52	$	111.34	$	116.98	$	111.64	$	140.48
FTSE NAREIT US Real Estate Index	$	100.00	$	103.05	$	111.13	$	115.46	$	111.51	$	138.66
FTSE NAREIT Equity Office Index	$	100.00	$	100.25	$	113.42	$	119.46	$	102.12	$	134.18

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Share Repurchases

Our board of directors authorized a stock repurchase program to purchase up to an aggregate of $200.0 million of our common stock from September 4, 2019 through September 4, 2021 (the "2019 Stock Repurchase Program"). During the quarter ended December 31, 2019, we repurchased and retired the following shares in accordance with the 2019 Stock Repurchase Program:

Period	Total Number of Shares Purchased	Average  Price Paid  per Share		Total Number of Shares Purchased as Part of Publicly Announced Plan	Maximum Approximate Dollar Value Available for Future Purchase(1)
October 2019	463,399	$	20.22	463,399	$	190,631,582
November 2019	1,152,400	$	20.93	1,152,400	$	166,515,922
December 2019	—	$	—	—	$	166,515,922

⁽¹⁾Amounts available for future purchase relate only to our 2019 Stock Repurchase Program and represent the remainder of the $200 million authorized by our board of directors for share repurchases.

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ITEM 6.SELECTED FINANCIAL DATA

The following selected financial data of Columbia Property Trust for 2019, 2018, 2017, 2016, and 2015 should be read in conjunction with the accompanying consolidated financial statements and related notes in Item 8, Financial Statements and Supplementary Data, hereof (amounts in thousands, except per-share data).

	As of December 31,
	2019		2018		2017		2016		2015
Total assets	$	4,244,945	$	4,173,993	$	4,511,539	$	4,299,793	$	4,678,118
Total stockholders' equity	$	2,628,617	$	2,741,016	$	2,531,936	$	2,502,768	$	2,614,194
Outstanding debt(1)	$	1,484,000	$	1,332,000	$	1,674,176	$	1,424,602	$	1,735,063
Outstanding long-term debt(1)	$	1,484,000	$	1,332,000	$	1,302,000	$	1,302,602	$	1,577,063
Obligations under capital leases	$	—	$	—	$	120,000	$	120,000	$	120,000
	Years Ended December 31,
	2019		2018		2017		2016		2015
Total revenues	$	288,837	$	297,943	$	289,000	$	473,543	$	566,065
Income (loss) from unconsolidated joint venture	$	8,004	$	8,003	$	2,651	$	(7,561)	$	(1,142)
Net income attributable to common stockholders of Columbia Property Trust	$	9,197	$	9,491	$	176,041	$	84,821	$	44,619
Net cash provided by operating activities	$	137,443	$	97,625	$	61,924	$	193,091	$	223,080
Net cash provided by (used in) investing activities	$	(170,309)	$	375,730	$	(347,723)	$	525,613	$	(576,699)
Net cash provided by (used in) financing activities	$	28,051	$	(465,804)	$	79,281	$	(535,264)	$	263,474
Investments in real estate (acquisitions, earnest money deposits, capital projects)	$	(520,122)	$	(94,067)	$	(691,574)	$	(39,521)	$	(1,145,402)
Investments in unconsolidated joint ventures	$	(17,134)	$	(38,763)	$	(369,043)	$	(16,212)	$	(5,500)
Distributions paid(2)	$	(93,480)	$	(95,056)	$	(109,561)	$	(148,474)	$	(112,570)
Stock repurchases(2)(3)	$	(35,917)	$	(72,495)	$	(59,462)	$	(53,986)	$	(17,057)
Net debt and bond proceeds (repayments)(2)	$	152,000	$	(293,175)	$	249,573	$	(311,769)	$	378,995
Per Weighted-Average Common Share Data:
Net income attributable to common stockholders – basic	$	0.08	$	0.08	$	1.45	$	0.68	$	0.36
Net income attributable to common stockholders – diluted	$	0.08	$	0.08	$	1.45	$	0.68	$	0.36
Distributions declared	$	0.81	$	0.80	$	0.80	$	1.20	$	1.20
Weighted-average common shares outstanding – basic	116,261		117,888		120,795		123,130		124,757
Weighted-average common shares outstanding – diluted	116,458		118,311		121,159		123,228		124,847

⁽¹⁾Excludes discounts and deferred financing costs.

⁽²⁾Activity is presented on a cash basis. Please refer to our accompanying consolidated statements of cash flows.

⁽³⁾Stock repurchases were made under board-approved stock repurchase plans or in settlement of taxes related to stock compensation.

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

The following discussion and analysis should be read in conjunction with the Selected Financial Data in Item 6, Selected Financial Data, above and our accompanying consolidated financial statements and notes thereto. See also "Cautionary Note Regarding Forward-Looking Statements" preceding Part I.

Executive Summary

On January 24, 2020, we acquired Normandy, a vertically integrated real estate company focused in New York; Boston; and Washington, D.C., and general partnership interests in three active real estate funds, for approximately $100 million, exclusive of transaction and closing costs. We believe that the acquisition of Normandy will further our strategic initiatives by strengthening our platform with additional development and redevelopment expertise, deal sourcing, other key capabilities, and by increasing our access to capital through Normandy's investor relationships.

Our primary strategic objective is to generate long-term stockholder returns from a combination of growing cash flows and appreciation in the values of our properties. We own and operate high-quality office properties located in high-barrier-to-entry markets, primarily New York; San Francisco; Washington, D.C.; and Boston. Our approach is to own office buildings that are competitive within the top tier of their markets or that will be repositioned as such through value-add initiatives, including development or redevelopment. Our investment objectives include optimizing our portfolio allocation between stabilized investments and more growth-oriented, value-add investments and development projects with an emphasis on central business districts and multi-tenant buildings.

Over the past several years, we have undertaken a capital recycling program that has involved selling more than 50 properties in geographically dispersed markets for aggregate proceeds of $4.4 billion, and reinvesting those proceeds in our core markets. In December 2019, we acquired for $205.5 million, 101 Franklin Street, a 16-story, 235,000-square-foot office building in Manhattan that will be fully redeveloped; and we acquired for $238.9 million, 201 California Street, a 17-story, 252,000-square-foot office tower in San Francisco that is 99% leased to 34 tenants. In January 2020, we sold Cranberry Woods Drive in Pittsburgh for a gross sale price of $180.0 million. We are continuing to pursue additional strategic investment opportunities in our target markets.

Our portfolio is 97.1% leased, with less than 3% of our leases scheduled to expire in 2020. During 2019, we leased a total of 779,000 square feet of space, including a renewal lease with Pershing for 330,000 square feet at 95 Columbus in Jersey City. We continue to maintain a strong and flexible balance sheet. As of December 31, 2019, our debt-to-real-estate-asset ratio is 35.6%⁽¹⁾⁽²⁾; 91.5%⁽¹⁾ of our portfolio is unencumbered by mortgages; and our weighted average cost of borrowing during the quarter is 3.48%⁽¹⁾ per annum. Our debt maturities are laddered, coming due in two to seven years, and $784.0 million of our unsecured borrowings can be repaid prior to maturity without penalty. From time to time when we believe our stock is undervalued, we may take advantage of market opportunities by using our stock repurchase program to buy shares and return capital to our stockholders. During the fourth quarter of 2019, we repurchased 1.6 million shares at an average price of $20.72 per share, for aggregate purchases of $33.5 million. As of December 31, 2019, $166.5 million remains available under our current repurchase program.

⁽¹⁾Statistics include 100% of all of our consolidated properties and our ownership interest in the gross real estate assets and debt at properties held through unconsolidated joint ventures as described in Note 4, Unconsolidated Joint Ventures, of the accompanying financial statements.

⁽²⁾On a net basis (i.e., reduced for cash on hand), our debt-to-real-estate-asset ratio is 34.8%.

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Key Performance Indicators

Our operating results depend primarily upon the level of income generated by the leases at our properties. Occupancy and rental rates are critical drivers of our lease income. Over the last year, our portfolio percentage leased ranged from 97.4% at December 31, 2018 to 97.1% at December 31, 2019. The following table sets forth details related to the financial impact of our recent leasing activities for properties we consolidate and based on our proportionate share of properties owned through unconsolidated joint ventures:

	Years Ended December 31,
	2019			2018
Total number of leases	46			59
Square feet of leasing – renewal	547,673			505,612
Square feet of leasing – new	175,167			567,288
Total square feet of leasing	722,840			1,072,900
Average lease term (months)	144			122
Tenant improvement allowances, per square foot – renewal	$	54.95		$	28.53
Tenant improvements allowances, per square foot – new	$	81.93		$	82.29
Tenant improvements allowances, per square foot – all leases	$	61.87		$	66.29
Leasing commissions, per square foot – renewal	$	35.99		$	24.04
Leasing commissions, per square foot – new	$	44.19		$	27.56
Leasing commissions, per square foot – all leases	$	38.10		$	26.51
Rent leasing spread – renewal(1)	59.7		%	11.6		%
Rent leasing spread – new(1)	61.2		%	34.4		%
Rent leasing spread – all leases(1)	59.9		%	23.1		%

⁽¹⁾Rent leasing spreads are calculated based on the change in base rental income measured on a straight-line basis; and, for new leases, only include space that has been vacant for less than one year.

In 2019, rent leasing spreads were positive (59.9%), primarily related to a 333,000-square-foot office lease renewal with Pershing at 95 Columbus in Jersey City, a 46,000-square-foot renewal lease at 221 Main Street in San Francisco, a 31,000-square-foot renewal lease at 650 California Street in San Francisco, and a 29,500-square-foot lease renewal at 218 West 18th Street in New York City. In 2019, tenant improvements included $120.00 per square foot for the 31,000-square foot lease renewal at 650 California Street and $100.00 per square foot for a new 24,000-square-foot lease at 221 Main Street. In 2018, rent leasing spreads were positive (23.1%), primarily due to a lease extension with Twitter for 215,000 square feet at 249 West 17th Street and lease expansions for an aggregate of 199,000 square feet with Arby's Restaurant Group, a subsidiary of Inspire Brands, at One & Three Glenlake Parkway in Atlanta. In 2018, tenant improvement allowances include $115.00 per square foot for a new, 16.5-year lease with WeWork for 115,000 square feet at 149 Madison Avenue, which will entail a full-scale redevelopment of the property.

Liquidity and Capital Resources

Overview

Cash flows generated from the operation of our properties are primarily used to fund recurring expenditures and stockholder dividends. The amount of distributions to common stockholders is determined by our board of directors and is dependent upon a number of factors, including funds deemed available for distribution based principally on our current and future projected operating cash flows, reduced by capital requirements necessary to maintain our existing portfolio, our future capital needs, and future sources of liquidity, as well as the annual distribution requirements necessary to maintain our status as a REIT under the Code. Investments in new property acquisitions and first-generation capital improvements are generally funded with capital proceeds from property sales, debt, or cash on hand. Our board of directors declared a dividend for the fourth quarter of 2019 at a rate of $0.21 per share,

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which represents a $0.01 per share, or 5.0%, increase from the prior quarter. The fourth quarter dividend was paid in January 2020. The board of directors declared a dividend for the first quarter of 2020 at the same rate, $0.21 per share, which will be paid in March 2020 to stockholders of record as of March 2, 2020.

Short-Term Liquidity and Capital Resources

During 2019, we generated net cash flows from operating activities of $137.4 million, which consists primarily of receipts from tenants for rent and reimbursements, reduced by payments for operating costs, administrative expenses, interest expense, and lease inducements. During the same period, we paid total distributions to stockholders of $93.5 million, which included dividend payments for four quarters ($23.3 million for the fourth quarter of 2018 and an aggregate of $70.2 million for the first three quarters of 2019).

During 2019, we received $375.0 million in net sales proceeds from the sale of Lindbergh Center and One & Three Glenlake Parkway and had $152.0 million in net borrowings on our line of credit and term loans. These proceeds, along with cash on hand, were used to fund the acquisition of 201 California Street in San Francisco for $246.2 million; the acquisition of 101 Franklin Street in New York for $206.8 million; and leasing and capital projects, including those at our joint ventures, of $106.4 million.

Over the short term, we expect our primary sources of capital and liquidity to be operating cash flows, select property dispositions, and debt. We expect that our principal demands for funds will be property acquisitions, capital improvements to our existing portfolio, stockholder distributions, stock repurchases, operating expenses, and interest and principal payments. As of February 3, 2020, we have access to $426.0 million under our Revolving Credit Facility. We believe that we will have adequate liquidity and capital resources to meet our current obligations as they come due.

Long-Term Liquidity and Capital Resources

Over the long term, we expect that our primary sources of capital will include operating cash flows, select property dispositions, and borrowing proceeds. We expect that our primary uses of capital will continue to include stockholder distributions; acquisitions; capital expenditures, such as building improvements, tenant improvements, and leasing costs; and repaying or refinancing debt.

Consistent with our operational strategy and financing objectives, over the long term we have generally maintained debt levels at less than 40% of the undepreciated costs of our assets. As of December 31, 2019, our debt-to-real-estate-asset ratio was approximately 35.6%. Our debt-to-real-estate-asset ratio includes 100% of all consolidated assets and debt, and our proportional share of assets (including basis adjustments) and debt held by our unconsolidated joint ventures.

As described below, our variable-rate indebtedness may use London Interbank Offering Rate ("LIBOR") as a benchmark for establishing the rate. LIBOR is expected to be discontinued at the end of 2021. The anticipated discontinuation of LIBOR will require lenders and their borrowers to transition from LIBOR to an alternative benchmark interest rate, which might increase the cost of our variable-interest debt instruments. At this time, no consensus exists as to what rate or rates may become acceptable alternatives to LIBOR, and it is impossible to predict the effect of any such alternatives on the value of LIBOR-based variable-rate loans or other financial arrangements. If LIBOR is discontinued as anticipated, or otherwise at our option, our Revolving Credit Facility and term loan facilities provide for alternate interest rate calculations.

Unsecured Bank Debt

Our Revolving Credit Facility has a capacity of $650.0 million and matures in January 2023, with two six-month extension options. As of December 31, 2019, we had $334.0 million in outstanding borrowings on the Revolving Credit Facility. Amounts outstanding under the Revolving Credit Facility bear interest at LIBOR, plus an applicable margin ranging from 0.775% to 1.45% for LIBOR borrowings, or an alternate base rate, plus an applicable margin ranging from 0.00% to 0.45% for base rate borrowings, based on our applicable credit rating. The per annum facility fee on the aggregate revolving commitment (used or unused) ranges from 0.125% to 0.30%, also based on our applicable credit rating. Additionally, the Revolving Credit Facility, along with the $300 Million Term Loan, as

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described below, provides for four accordion options for an aggregate additional amount of up to $500 million, subject to certain limitations.

Our $300.0 million unsecured term loan matures in January 2024 (the "$300 Million Term Loan") and bears interest, at our option, at either (i) LIBOR, plus an applicable margin ranging from 0.85% to 1.65% for LIBOR loans, or (ii) an alternate base rate, plus an applicable margin ranging from 0.00% to 0.65% for base rate loans, based on our applicable credit rating. The interest rate on the $300 Million Term Loan is effectively fixed with an interest rate swap agreement, which is designated as a cash flow hedge. Based on the terms of the interest rate swap and our current credit rating, the interest rate on the $300 Million Term Loan is effectively fixed at 2.55%.

Our $150.0 million unsecured term loan matures in July 2022 (the "$150 Million Term Loan") and bears interest, at our option, at either (i) LIBOR, plus an applicable margin ranging from 0.90% to 1.75% for LIBOR loans, or (ii) alternative base rate, plus an applicable margin ranging from 0.00% to 0.75% for base rate loans, based on our applicable credit rating. The interest rate on the $150 Million Term Loan is effectively fixed with an interest rate swap agreement, which is designated as a cash flow hedge. Based on the terms of the interest rate swap and our current credit rating, the interest rate on the $150 Million Term Loan is effectively fixed at 3.07%.

Debt Covenants

As of December 31, 2019, the $300 Million Term Loan, the $150 Million Term Loan, and the Revolving Credit Facility contain the following restrictive covenants, which are defined in the debt agreements:

•limit the ratio of secured debt to total asset value to 40% or less;

•require the fixed charge coverage ratio to be at least 1.50:1.00;

•limit the ratio of debt to total asset value to 60% or less, or 65% or less following a material transaction;

•require the ratio of unencumbered interest coverage ratio to be at least 1.75:1.00;

•limit the unencumbered leverage ratio to 60% or less, or 65% or less following a material transaction.

As of December 31, 2019, we were in compliance with the restrictive covenants on these outstanding debt obligations.

Bonds Payable

In August 2016, we issued $350.0 million of 10-year, unsecured 3.650% senior notes at 99.626% of their face value (the "2026 Bonds Payable"). The 2026 Bonds Payable require semi-annual interest payments in February and August based on a contractual annual interest rate of 3.650%. The principal amount of the 2026 Bonds Payable is due and payable on the maturity date, August 15, 2026.

In March 2015, we issued $350.0 million of 10-year, unsecured 4.150% senior notes at 99.859% of their face value (the "2025 Bonds Payable"). The 2025 Bonds Payable require semi-annual interest payments in April and October based on a contractual annual interest rate of 4.150%. The principal amount of the 2025 Bonds Payable is due and payable on the maturity date, April 1, 2025.

The restrictive covenants on the 2026 Bonds Payable and the 2025 Bonds Payable as defined pursuant to an indenture include:

•a limitation on the ratio of debt to total assets, as defined, to 60%;

•limits to our ability to incur debt if the consolidated income available for debt service to annual debt service charge, as defined, for four previous consecutive fiscal quarters is less than 1.50:1.00 on a pro forma basis;

•limits to our ability to incur liens if, on an aggregate basis for us, the secured debt amount would exceed 40% of the value of the total assets; and

•a requirement that the ratio of unencumbered asset value, as defined, to total unsecured debt be at least 150% at all times.

As of December 31, 2019, we were in compliance with the restrictive covenants on the 2026 Bonds Payable and the 2025 Bonds Payable.

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Debt Settlements and Interest Payments

During 2019, we made interest payments of approximately $17.9 million related to our term loans, line of credit, and notes payable, and $27.3 million related to our bonds payable. There were no debt repayments in 2019. During 2018, we made the following debt repayments:

•On December 14, 2018, we terminated both the $120.0 million development authority bonds and the corresponding obligations under capital leases related to One & Three Glenlake Parkway in Atlanta.

•On December 7, 2018, concurrent with closing on the amendment and restatement of our term loan and revolving credit facility, we repaid the $300 million remaining balance on the $300 Million Term Loan, which includes a delayed-draw feature, allowing up to 12 months to fully draw the term loan.

•On October 10, 2018, we paid the $20.7 million outstanding balance on the One Glenlake mortgage note two months prior to its original maturity date.

•On April 13, 2018, we transferred 263 Shuman Boulevard to the lender in extinguishment of the $49.0 million loan principal, accrued interest expense, and accrued property operating expenses, which resulted in a gain on extinguishment of debt of $24.0 million in the second quarter of 2018.

•On February 2, 2018, we repaid $120.0 million of the outstanding balance on a bridge loan with disposition proceeds from the sale of a portion of University Circle and 333 Market Street. On May 30, 2018, we repaid the remaining $180.0 million outstanding balance on this bridge loan with disposition proceeds from the sale of 222 East 41st Street. The settlement of a $300 million bridge loan resulted in a $0.3 million loss on extinguishment of debt to write off the related unamortized deferred financing costs.

Contractual Commitments and Contingencies

As of December 31, 2019, our contractual obligations will become payable in the following periods (in thousands):

Contractual Obligations	Total		2020		2021-2022		2023-2024		Thereafter
Debt obligations(1)	$	1,706,010	$	—	$	206,260	$	799,750	$	700,000
Interest obligations on debt(1)(2)	266,792		59,713		113,317		67,774		25,988
Operating lease obligations(3)	1,170,763		6,668		13,433		13,432		1,137,230
Total	$	3,143,565	$	66,381	$	333,010	$	880,956	$	1,863,218

⁽¹⁾Includes our ownership share of the debt and interest obligations for the Market Square Joint Venture and the 799 Broadway Joint Venture, which we own through unconsolidated joint ventures. The Market Square Joint Venture has a $325.0 million mortgage loan on the Market Square Buildings, which bears interest at 5.07% and matures on July 1, 2023. We own a 51% interest in the Market Square Joint Venture. The 799 Broadway Joint Venture has $113.2 million outstanding on a construction loan, which has a total capacity of $187.0 million; bears interest at LIBOR, capped at 4.00%, plus 425 basis points; and matures on October 9, 2021. We own a 49.7% interest in the 799 Broadway Joint Venture. As of December 31, 2019, we guarantee equity contributions of $15.8 million to be made to the joint venture, under the 799 Broadway construction loan agreement (see Note 7, Commitments and Contingencies, to the accompanying financial statements).

⁽²⁾Interest obligations on variable-rate debt are measured at the rate at which they are effectively fixed with interest rate swap agreements (where applicable) or the rate in effect as of December 31, 2019. Interest obligations on all other debt instruments are measured at the contractual rate. See Item 7A, Quantitative and Qualitative Disclosures about Market Risk, for more information regarding our interest rate swaps.

⁽³⁾These obligations are related to ground leases at certain properties, including 49.5% of the ground lease obligation at 114 Fifth Avenue, based on our ownership interest in the unconsolidated joint venture that owns that property, and our corporate office lease. In addition to the amounts shown, certain lease agreements include provisions that, at the option of the tenant, may obligate us to expend capital to expand an existing property or provide other expenditures for the benefit of the tenant.

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Results of Operations

Overview

As of December 31, 2019, we owned 17 operating properties and three properties under development or redevelopment, of which 13 were wholly owned and seven were owned through joint ventures. These properties are located primarily in New York, San Francisco, and Washington, D.C. and were approximately 97.1% leased as of December 31, 2019. Our period-over-period operating results are impacted by the real estate activities set forth in the "Transaction Activity" section of Item 1, Business, including acquisitions and dispositions made directly and through joint ventures. Other than real estate transactions, we expect real estate operating income to vary, primarily based on leasing activity over the near term.

Comparison of the Year Ended December 31, 2019 Versus the Year Ended December 31, 2018

Lease revenues were $276.1 million for 2019, which represents a modest decrease as compared with $283.3 million for 2018, as the impact of dispositions ($21.6 million) was partially offset by additional revenues from lease commencements ($13.1 million) and recent property acquisitions ($1.4 million). We expect future lease revenues to vary based on recent and future investing and leasing activities.

Asset and property management fee income was relatively stable at $7.5 million and $7.4 million for 2019 and 2018, respectively. We expect future asset and property management fee income to increase as a result of the Normandy Acquisition.

Other property income was $5.1 million for 2019, and $7.3 million for 2018. The 2019 activity relates to administrative reimbursements. We expect other property income to increase as a result of the Normandy Acquisition.

Property operating costs were $93.3 million for 2019, which represents an increase from $88.8 million for 2018, primarily due to increases in property taxes and other taxes. We expect property operating costs to vary based on recent and future investing and leasing activities.

Asset and property management fee expenses were $0.6 million for 2019, which represents a decrease from $0.9 million for 2018, as a result of transitioning one of our properties from third-party to internal management. We expect asset and property management fee expenses to vary in the future based on investing activities.

Depreciation was $78.3 million for 2019, which represents a modest decrease as compared with $81.8 million for 2018, as the impact of dispositions ($6.3 million) was partially offset by capital projects across the portfolio ($2.2 million) and recent property acquisitions ($0.4 million). We expect depreciation to vary based on recent and future investing activities and capital projects.

Amortization was $27.9 million for 2019, which represents a decrease as compared with $32.6 million for 2018, as a result of dispositions ($3.7 million) and lease terminations and extensions ($1.4 million), partially offset by recent property acquisitions ($0.4 million). We expect future amortization to vary based on recent and future investing and leasing activities.

For 2019, we recognized the following impairment losses: $23.4 million in connection with changing the holding period expectations for Lindbergh Center; and $20.6 million in connection with exiting the Los Angeles market with the planned sale of Pasadena Corporate Park. For 2018, we recognized an impairment loss of $30.8 million in connection with changing our holding period expectations for 222 East 41st Street. We expect future impairment losses to depend primarily on our holding period intentions and any disposition strategies evaluated for our other properties.

General and administrative – corporate expenses were relatively stable at $32.8 million for 2019 and $33.0 million for 2018. We expect future general and administrative – corporate expenses to remain at similar or slightly increased levels as a result of the Normandy Acquisition.

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General and administrative – unconsolidated joint ventures expenses were $3.6 million for 2019, which represents an increase as compared with $3.1 million for 2018, primarily due to expanding our team. We expect future general and administrative – unconsolidated joint ventures expenses to vary as a result of future investing activities.

For 2019, we recognized pre-acquisition costs of $6.4 million related to the Normandy transaction described in Note 16, Subsequent Events, of the accompanying consolidated financial statements. We expect to incur additional acquisition costs in connection with closing the transaction.

Interest expense was $43.2 million for 2019, which represents a decrease as compared with $56.5 million for 2018. The decrease results from the settlement of a capital lease obligation using the corresponding development authority bonds in December 2018 ($6.9 million), prior-year debt repayments and settlements ($5.3 million), and interest capitalization ($1.2 million). We expect interest expense to vary in the near term based on future financing activities.

We recognized a gain on extinguishment of debt of $23.3 million for 2018. In April 2018, we transferred 263 Shuman Boulevard to the lender in extinguishment of the related mortgage note, resulting in a $24.0 million gain on extinguishment of debt. In May 2018, we repaid the remaining outstanding balance on our bridge loan approximately six months early, resulting in a $0.3 million loss due to the write-off of related deferred financing costs; and in December 2018, we refinanced two of our debt facilities, resulting in a $0.3 million loss due to the write-off of related deferred financing costs.We expect future gains or losses on extinguishments of debt to vary with financing activities.

Interest and other income was $0.2 million for 2019, which represents a decrease as compared with $6.9 million for 2018. The majority of this income was earned on investments in development authority bonds, which were used to settle a corresponding capital lease obligation in December 2018. Interest income earned on investments in development authority bonds was entirely offset by interest expense incurred on the corresponding capital leases. We expect interest income to remain at similar levels in the near term.

We recognized a gain on sale of unconsolidated joint venture interests of $0.8 million for 2018, related to the sale of an additional 22.5% interest in University Circle and 333 Market Street joint ventures in February 2018, as further described in Note 3, Real Estate Transactions, to the accompanying consolidated financial statements. We expect future gains or losses on sales of unconsolidated joint venture interests to vary with future joint venture disposition activities.

Income from unconsolidated joint ventures was flat at $8.0 million for 2019 and 2018. We expect income from the unconsolidated joint ventures to vary based on future joint venture investing activities and leasing activity at the properties owned through unconsolidated joint ventures.

We recognized gains on sales of real estate assets of $42.0 million in 2019, as a result of selling One & Three Glenlake Parkway in April 2019. See Note 3, Real Estate Transactions, of the accompanying consolidated financial statements for additional details. We expect future gains on sales of real estate assets to vary with disposition activity.

Net loss attributable to noncontrolling interests reflects the allocation of earnings from the 101 Franklin Street joint venture to our joint venture partner.

Net income attributable to stockholders of Columbia Property Trust was $9.2 million, or $0.08 per basic and diluted share, for 2019, which represents a slight decrease as compared with $9.5 million, or $0.08 per basic and diluted share, for 2018. The decrease is primarily due to prior-period gain on extinguishment of debt ($23.3 million) and year-over-year impairment activity ($13.1 million), partially offset by the current period gain on sale of One & Three Glenlake Parkway ($42.0 million). See "Supplemental Performance Measures" below for our same-store results compared with the prior year. We expect future earnings to vary primarily as a result of leasing activity at our existing properties and future investing activity.

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Comparison of the Year Ended December 31, 2018 Versus the Year Ended December 31, 2017

For a comparison of our operations between 2018 and 2017, see our 2018 Annual Report on Form 10-K (the "Results of Operations" section of Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations), as filed with the SEC on February 13, 2019.

NOI by Geographic Segment

We consider geographic location when evaluating our portfolio composition and in assessing the ongoing operations and performance of our properties. As of December 31, 2019, we aggregated our properties into the following geographic segments: New York, San Francisco, Atlanta, Washington, D.C., Boston, Los Angeles, and all other office markets. All other office markets consists of properties in low-barrier-to-entry geographic locations in which we do not have a substantial presence and/or do not plan to make further investments. See Note 15, Segment Information, to the accompanying consolidated financial statements.

The following table presents NOI by geographic segment (in thousands):

	For the Years Ended December 31,
	2019		2018
New York	$	93,112	$	94,765
San Francisco	83,305		79,354
Washington, D.C.	33,953		34,750
Boston	7,539		7,205
Los Angeles	4,601		4,590
All other office markets	35,428		51,638
Total office segments	257,938		272,302
Hotel	—		—
Corporate	(904)		(803)
Total	$	257,034	$	271,499

Comparison of the Year Ended December 31, 2019 Versus the Year Ended December 31, 2018

San Francisco

NOI has increased primarily due to leasing at 650 California Street and 221 Main Street. From December 31, 2018 to December 31, 2019, 650 California Street's commenced occupancy increased from 93.9% to 97.1%, and 221 Main Street's commenced occupancy increased from 87.9% to 99.2%.

Boston

NOI has increased as a result of leasing at 116 Huntington Avenue. From December 31, 2018 to December 31, 2019, 116 Huntington Avenue's commenced occupancy increased from 89.0% to 96.5%.

All Other Office Markets

NOI decreased primarily as a result of selling our remaining Atlanta properties during 2019.

Supplemental Performance Measures

In addition to net income, we measure our performance using certain non-GAAP metrics, including: (i) Funds from Operations ("FFO"), (ii) Net Operating Income ("NOI"), and (iii) Same Store Net Operating Income ("Same Store NOI"). These supplemental performance measures are commonly used by REIT industry analysts and investors, and are viewed by management to be useful indicators of operating performance principally because they exclude the effects of certain income and expenses that do not reflect the cash-generating capability of our operations. Management believes that the use of FFO, NOI, and Same Store NOI, combined with net income, improves the

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understanding of operating results of REITs among the investing public, and makes comparisons of REIT operating results more meaningful.

Net income is the most comparable GAAP measure to FFO, NOI, and Same Store NOI. Each of these supplemental performance measures excludes expenses that materially impact our overall results of operations and, therefore, should not be considered as a substitute for net income, or any other measures derived in accordance with GAAP. Furthermore, these metrics may not be comparable to other similarly titled measures used by other companies.

Funds from Operations

FFO, as defined by the National Association of Real Estate Investment Trusts ("NAREIT"), represents net income (computed in accordance with GAAP), excluding gains or losses on sales of real estate and impairments of real estate assets, plus real estate-related depreciation and amortization, after adjustments for unconsolidated partnerships and joint ventures, for both continuing and discontinued operations. We compute FFO in accordance with NAREIT's definition, which may differ from the methodology for calculating FFO, or similarly titled measures, used by other companies, and may not be comparable to those presentations. We calculate FFO based on amounts attributable to our common stockholders, which includes earnings from investments owned directly; and our proportional share of earnings from investments owned through consolidated and unconsolidated subsidiaries.

FFO is a non-GAAP measure used by many investors and analysts who follow the real estate industry to measure the performance of an equity REIT. We consider FFO a useful measure of our performance, principally because it excludes the effects of depreciation and amortization of real estate assets. GAAP depreciation and amortization reflect a systematic reduction in the carrying value of real estate assets and, therefore, are not indicative of the actual increase or decrease in the realizable value of real estate assets. We believe that the use of FFO, combined with the required GAAP presentations, is beneficial in improving our investors' understanding of our operating results and allowing for comparisons among other companies who define FFO as we do.

FFO does not represent amounts available for management's discretionary use because of needed capital replacement or expansion, debt service obligations, or other commitments and uncertainties, nor is it indicative of funds available to fund our cash needs, including our ability to make distributions. Our presentation of FFO should not be considered as an alternative to net income (computed in accordance with GAAP) as an indicator of financial performance.

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Net income attributable to common stockholders of Columbia Property Trust reconciles to FFO as follows (in thousands):

	Years Ended December 31,
	2019		2018		2017
Reconciliation of Net Income to Funds from Operations:
Net income attributable to common stockholders	$	9,197	$	9,491	$	176,041
Adjustments:
Depreciation of real estate assets	78,292		81,795		80,394
Amortization of lease-related costs	27,908		32,554		32,403
Depreciation and amortization attributable to our interest in unconsolidated joint ventures(1)	50,617		51,377		21,288
Impairment loss on real estate assets	43,941		30,812		—
Gain on sale of unconsolidated joint venture interests	—		(762)		—
Gains on sales of real estate assets	(42,030)		—		(175,518)
Funds from Operations	$	167,925	$	205,267	$	134,608

⁽¹⁾Depreciation and amortization related to properties in unconsolidated joint ventures is recorded as equity in earnings from unconsolidated joint ventures.

The following significant non-cash revenues and expenses are included in our FFO:

•Straight-line rental income, net:  To recognize rent on a straight-line basis over the lease term, we recognized net straight-line rental income for our wholly owned properties of $12.4 million, $25.9 million, and $31.9 million in 2019, 2018, and 2017, respectively. Income (loss) from unconsolidated joint ventures includes additional net straight-line rental income of $1.3 million, $(0.7) million, and $(0.7) million in 2019, 2018, and 2017, respectively. 

•Amortization of intangible lease assets and liabilities:  To amortize above- and below-market, in-place lease intangible assets (liabilities), we recognized net increases to rental revenues (or decreases to operating expenses) for our wholly owned properties of $4.4 million, $3.2 million, and $0.5 million in 2019, 2018, and 2017, respectively. Income (loss) from unconsolidated joint ventures includes additional net operating income for amortization of intangible lease assets and liabilities of $9.8 million, $11.5 million, and $2.3 million in 2019, 2018, and 2017, respectively. 

•Gain (loss) on extinguishment of debt:  We recognized gains or losses on the repayment of debt before maturity of $23.3 million and $(0.3) million in 2018 and 2017, respectively. 

•Amortization of deferred financing costs and debt premiums (discounts):  To amortize costs associated with securing debt from third-party lenders over the terms of the respective debt facilities, we recognized net interest expense of $2.6 million, $3.1 million, and $3.0 million for 2019, 2018, and 2017, respectively. Income (loss) from unconsolidated joint ventures includes additional net interest expense of $(1.6) million in 2019 and 2018. 

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Net Operating Income

As set forth below, NOI is calculated by deducting property operating costs from rental and other property revenues for continuing operations. As a performance metric consisting of only revenues and expenses directly related to ongoing real estate rental operations, which have been or will be settled in cash, NOI is narrower in scope than FFO.

NOI, as we calculate it, may not be directly comparable to similarly titled, but differently calculated, measures for other REITs. We believe that NOI is another useful supplemental performance measure, as it is an input in many REIT valuation models, and it provides a means by which to evaluate the performance of the properties.

The major factors influencing our NOI are property acquisitions and dispositions, occupancy levels, rental rate increases or decreases, and the recoverability of operating expenses.

Same Store Net Operating Income

We also evaluate the performance of our properties, on a "same store" basis, using a metric referred to as Same Store NOI. We view Same Store NOI as a useful supplemental performance measure because it improves comparability between periods by eliminating the effects of changes in the composition of our portfolio. On an individual property basis, Same Store NOI is computed in a consistent manner as NOI (as described in the previous section). For the periods presented, we have defined our same store portfolio as those properties that have been continuously owned and operating since January 1, 2018. NOI and Same Store NOI are calculated as follows for the years ended December 31, 2019 and 2018 (in thousands):

	Years Ended December 31,
	2019		2018
Same-Store NOI – wholly owned properties:
Revenues:
Lease revenues	$	249,423	$	236,353
Other property income	4,933		5,097
Total revenues	254,356		241,450
Operating expenses	(87,808)		(82,048)
Same Store NOI – wholly owned properties(1)	166,548		159,402
Same Store NOI – joint-venture owned properties(2)	69,957		69,350
Total Same Store NOI	236,505		228,752
NOI from acquisitions(3)	529		(66)
NOI from dispositions(4)	20,000		42,813
NOI	$	257,034	$	271,499

⁽¹⁾Reflects NOI from properties that were wholly owned for the entirety of the periods presented.

⁽²⁾Reflects NOI earned from properties owned through unconsolidated joint ventures based on our ownership interest as of December 31, 2019, for the entirety of the periods presented. The NOI for properties held through unconsolidated joint ventures is included in income (loss) from unconsolidated joint ventures in our accompanying consolidated statements of operations. See Note 4, Unconsolidated Joint Ventures, of the accompanying consolidated financial statements, for more information.

⁽³⁾Reflects activity for the following properties acquired since January 1, 2018, for all periods presented: 201 California Street acquired on December 9, 2019, 92.5% of 101 Franklin Street acquired on December 2, 2019, and 49.7% of 799 Broadway acquired on October 3, 2018.

⁽⁴⁾Reflects activity for the following properties sold since January 1, 2018, for all periods presented: Lindbergh Center sold on September 26, 2019, One & Three Glenlake sold on April 15, 2019, 222 East 41st Street sold on May 29, 2018, and 22.5% of both University Circle and 333 Market Street sold on February 1, 2018.

Same Store NOI increased from $228.8 million for 2018 to $236.5 million for 2019, primarily as a result of leasing at 650 California Street in San Francisco and at 315 Park Avenue South in New York.

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A reconciliation of Net Income to NOI and Same Store NOI is presented below (in thousands):

	Years Ended December 31,
	2019		2018
Net income attributable to stockholders of Columbia Property Trust	$	9,197	$	9,491
Depreciation	78,292		81,795
Amortization	27,908		32,554
Impairment of real estate assets	43,941		30,812
General and administrative – corporate	32,779		32,979
General and administrative – joint venture	3,567		3,108
Pre-acquisition costs	6,398		—
Net interest expense	42,997		56,477
Interest income from development authority bonds	—		(6,871)
(Gain) loss on extinguishment of debt	—		(23,340)
Income tax expense	21		37
Asset and property management fee income	(7,544)		(7,384)
Adjustment included in income from unconsolidated joint ventures	61,634		62,603
Gain on sale of unconsolidated joint venture interest	—		(762)
Gains on sales of real estate assets	(42,030)		—
Amounts attributable to noncontrolling interest	(126)		—
Net operating income	257,034		271,499
Same Store NOI – joint venture owned properties(1)	(69,957)		(69,350)
NOI from acquisitions(2)	(529)		66
NOI from dispositions(3)	(20,000)		(42,813)
Same Store NOI – wholly owned properties(4)	$	166,548	$	159,402

⁽¹⁾For all periods presented, reflects our ownership interest in NOI for properties owned through unconsolidated joint ventures as of December 31, 2019, for the entirety of the periods presented. The NOI for properties held through unconsolidated joint ventures is included in income from unconsolidated joint ventures in our accompanying consolidated statements of operations. See Note 4, Unconsolidated Joint Ventures, of the accompanying consolidated financial statements, for more information.

⁽²⁾Reflects activity for the following properties acquired since January 1, 2018, for all periods presented: 201 California Street acquired on December 9, 2019, 92.5% of 101 Franklin Street acquired on December 2, 2019, and 49.7% of 799 Broadway acquired on October 3, 2018.

⁽³⁾Reflects activity for the following properties sold since January 1, 2018, for all periods presented: Lindbergh Center sold on September 26, 2019, One & Three Glenlake sold on April 15, 2019, 222 East 41st Street sold on May 29, 2018, and 22.5% of both University Circle and 333 Market Street sold on February 1, 2018.

⁽⁴⁾Reflects NOI from properties that were wholly owned for the entirety of the periods presented.

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Portfolio Information

As of December 31, 2019, we owned 17 operating properties and three properties under development or redevelopment, of which 13 were wholly owned and seven were owned through joint ventures. These properties are located primarily in New York, San Francisco, and Washington, D.C., contain a total of 7.3 million rentable square feet, and were approximately 97.1% leased as of December 31, 2019.

As of December 31, 2019, our five highest geographic reportable segments, based on 2019 Annualized Lease Revenue, were as follows. For more information about our reportable segments, see Note 15, Segment Information, to the accompanying consolidated financial statements.

Location	Leased Square Feet (in thousands)	2019 Annualized Lease Revenue (in thousands)		Percentage of 2019 Annualized Lease Revenue
New York	2,031	$	143,493	39	%
San Francisco	1,675	124,381		34	%
Washington, D.C.	860	60,498		16	%
Boston	272	16,308		4	%
Los Angeles	247	8,825		2	%
	5,085	$	353,505	95	%

As of December 31, 2019, our five highest tenant industry concentrations, based on 2019 Annualized Lease Revenue, were as follows:

Industry	Leased Square Feet (in thousands)	2019 Annualized Lease Revenue (in thousands)		Percentage of 2019 Annualized Lease Revenue
Business Services	1,212	$	97,067	26	%
Depository Institutions	889	39,542		11	%
Engineering & Management Services	481	29,417		8	%
Nondepository Institutions	392	26,363		7	%
Legal Services	269	24,222		7	%
	3,243	$	216,611	59	%

As of December 31, 2019, our five highest tenant concentrations, based on 2019 Annualized Lease Revenue, were as follows:

	2019 Annualized Lease Revenue (in thousands)		Percentage of 2019 Annualized Lease Revenue
Pershing	$	18,712	5	%
Twitter	17,398		5	%
Wells Fargo	15,658		4	%
Yahoo!	15,142		4	%
Westinghouse Electric	14,995		4	%
	$	81,905	22	%

For more information on our portfolio, see Item 2, Properties.

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Election as a REIT

We have elected to be taxed as a REIT under the Code, and have operated as such beginning with our taxable year ended December 31, 2003. To qualify as a REIT, we must meet certain organizational and operational requirements, including a requirement to distribute at least 90% of our adjusted taxable income, as defined in the Code, to our stockholders, computed without regard to the dividends-paid deduction and by excluding our net capital gain. As a REIT, we generally will not be subject to federal income tax on income that we distribute to our stockholders. To the extent that we satisfy the distribution requirement but distribute less than 100% of our REIT taxable income, we would be subject to federal and state corporate income tax on the undistributed income. If we fail to qualify as a REIT in any taxable year, we will then be subject to federal income taxes on our taxable income for that year and for the four years following the year during which qualification is lost, unless the Internal Revenue Service grants us relief under certain statutory provisions. Such an event could materially affect our net income and net cash available for distribution to our stockholders. However, we believe that we are organized and operate in such a manner as to qualify for treatment as a REIT for federal income tax purposes.

Columbia Property Trust TRS, LLC; Columbia KCP TRS, LLC; and Columbia Energy TRS, LLC (collectively, the "TRS Entities") are wholly owned subsidiaries of Columbia Property Trust and are organized as Delaware limited liability companies. The TRS Entities, among other things, provide tenant services that we, as a REIT, cannot otherwise provide. We have elected to treat the TRS Entities as taxable REIT subsidiaries. We may perform certain additional, noncustomary services for tenants of our buildings through the TRS Entities; however, any earnings related to such services are subject to federal and state income taxes. In addition, for us to continue to qualify as a REIT, we must limit our investments in taxable REIT subsidiaries to 20% of the value of our total assets. Deferred tax assets and liabilities are established for temporary differences between the financial reporting basis and the tax basis of assets and liabilities at the enacted rates expected to be in effect when the temporary differences reverse.

No provisions for federal income taxes have been made in our accompanying consolidated financial statements, other than the provisions relating to the TRS Entities, as we made distributions in excess of taxable income for the periods presented. We are subject to certain state and local taxes related to property operations in certain locations, which have been provided for in our accompanying consolidated financial statements.

Inflation

We are exposed to inflation risk, as income from long-term leases is the primary source of our cash flows from operations. There are provisions in the majority of our tenant leases that are intended to protect us from, and mitigate the risk of, the impact of inflation. These provisions include rent steps, reimbursement billings for operating expense pass-through charges, real estate tax and insurance reimbursements on a per-square-foot basis, or in some cases, annual reimbursement of operating expenses above a certain per-square-foot allowance. However, due to the long-term nature of the leases, the leases may not reset frequently enough to fully cover inflation.

Application of Critical Accounting Policies

Our accounting policies have been established to conform with GAAP. The preparation of financial statements in conformity with GAAP requires management to use judgment in the application of accounting policies, including making estimates and assumptions. These judgments affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the dates of the financial statements and the reported amounts of revenue and expenses during the reporting periods. If our judgment or interpretation of the facts and circumstances relating to various transactions had been different, it is possible that different accounting policies would have been applied, thus resulting in a different presentation of the financial statements. Additionally, other companies may utilize different estimates that may impact the comparability of our results of operations to those of companies in similar businesses.

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Investment in Real Estate Assets

We are required to make subjective assessments as to the useful lives of our depreciable assets. To determine the appropriate useful life of an asset, we consider the period of future benefit of the asset. These assessments have a direct impact on net income. The estimated useful lives of our assets by class are as follows:

Buildings	40 years
Building and site improvements	5-25 years
Tenant improvements	Shorter of economic life or lease term
Intangible lease assets	Lease term

Evaluating the Recoverability of Real Estate Assets

We continually monitor events and changes in circumstances that could indicate that the carrying amounts of the real estate and related intangible assets of both operating properties and properties under construction may not be recoverable. When indicators of potential impairment are present that suggest that the carrying amounts of real estate assets and related intangible assets (liabilities) may not be recoverable, we assess the recoverability of these assets by determining whether the respective carrying values will be recovered through the estimated undiscounted future operating cash flows expected from the use of the assets and their eventual disposition. In the event that such expected undiscounted future cash flows do not exceed the carrying values, we adjust the carrying value of the real estate assets and related intangible assets to the estimated fair values, pursuant to the property, plant, and equipment accounting standard for the impairment or disposal of long-lived assets, and recognize an impairment loss. Estimated fair values are calculated based on the following hierarchy of information, depending upon availability: (Level 1) recently quoted market prices; (Level 2) market prices for comparable properties; or (Level 3) the present value of future cash flows, including estimated residual value. Certain of our assets may be carried at an amount that exceeds that which could be realized in a current disposition transaction. We have determined that the carrying values of its real estate assets and related intangible assets are recoverable as of December 31, 2019.

Projections of expected future operating cash flows require that we estimate future market rental income amounts subsequent to the expiration of current lease agreements, property operating expenses, the number of months it takes to re-lease the property, and the number of years the property is held for investment, among other factors. Due to the inherent subjectivity of the assumptions used to project future cash flows, estimated fair values may differ from the values that would be realized in market transactions.

In the fourth quarter of 2019, we recorded an impairment loss of $20.6 million on Pasadena Corporate Park. Upon deciding to exit the Los Angeles market, we began to market for sale our only asset therein, Pasadena Corporate Park, in the fourth quarter of 2019. In January 2020, we entered into a contract to sell Pasadena Corporate Park, and anticipate closing on the sale in the first quarter of 2020. As a result, as of December 31,2019, we reduced the carrying value of Pasadena Corporate Park to reflect its estimated fair value of $74.5 million, determined based on estimated net sale proceeds (Level 1), by recording an impairment loss of $20.6 million.

In the third quarter of 2019, we recognized an impairment loss of $23.4 million as a result of changing the holding period expectations for Lindbergh Center in Atlanta, Georgia. We entered a contract to sell Lindbergh Center in the third quarter of 2019, and closed the sale on September 26, 2019. As a result, we reduced the carrying value of Lindbergh Center to reflect its estimated fair value, based on the estimated net sale proceeds of $181.0 million (Level 1), by recording an impairment loss of $23.4 million in the third quarter of 2019.

In the second quarter of 2018, we recognized an impairment loss of $30.8 million in connection with changing the holding period expectations for 222 East 41st Street in New York. We widely marketed this property for sale during the second quarter and, as a result, entered into an agreement to sell this property on May 25, 2018 and closed on the sale on May 29, 2018. Upon entering into the sale agreement, we reduced 222 East 41st Street's carrying value to reflect its fair value, estimated based on the net contract price of $284.6 million (Level 1), by recording an impairment loss of $30.8 million in the second quarter of 2018.

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Allocation of Purchase Price of Acquired Assets

Upon the acquisition of real properties, we allocate the purchase price of properties to tangible assets, consisting of land and building, site improvements, and identified intangible assets and liabilities, including the value of in-place leases, based in each case on our estimate of their fair values.

The fair values of the tangible assets of an acquired property (which includes land and building) are determined by valuing the property as if it were vacant, and the "as-if-vacant" value is then allocated to land and building based on our determination of the relative fair value of these assets. We determine the as-if-vacant fair value of a property using methods similar to those used by independent appraisers. Factors we consider in performing these analyses include an estimate of carrying costs during the expected lease-up periods considering current market conditions and costs to execute similar leases, including leasing commissions and other related costs. In estimating carrying costs, we include real estate taxes, insurance, and other operating expenses during the expected lease-up periods based on current market demand.

Intangible Assets and Liabilities Arising From In-Place Leases Where We Are the Lessor

As further described below, in-place leases where we are the lessor may have values related to direct costs associated with obtaining a new tenant that are avoided for in-place leases, opportunity costs associated with lost rentals that are avoided by acquiring an in-place lease, tenant relationships, and effective contractual rental rates that are above or below market:

•Direct costs associated with obtaining a new tenant that are avoided for in-place leases, including commissions, tenant improvement allowances, and other direct costs, are estimated based on management's consideration of current market costs to execute a similar lease. Such direct costs are included in intangible lease origination costs in the accompanying consolidated balance sheets and are amortized to expense over the remaining terms of the respective leases.

•The value of opportunity costs associated with lost rentals avoided by acquiring an in-place lease is calculated based on the contractual amounts to be paid pursuant to the in-place leases over a market absorption period for a similar lease. Such opportunity costs are included in intangible lease assets in the accompanying consolidated balance sheets and are amortized to expense over the remaining terms of the respective leases.

•The value of effective rental rates of in-place leases that are above or below the market rates of comparable leases is calculated based on the present value (using a discount rate that reflects the risks associated with the leases acquired) of the difference between (i) the contractual amounts to be received pursuant to the in-place leases and (ii) management's estimate of fair market lease rates for the corresponding in-place leases. This calculation includes significantly below-market renewal options for which exercise of the renewal option appears to be reasonably assured. These intangible assets or liabilities are measured over the actual or assumed (in the case of renewal options) remaining lease terms. The capitalized above-market and below-market lease values are recorded as intangible lease assets or liabilities and amortized as an adjustment to rental income over the remaining terms of the respective leases.

Evaluating the Recoverability of Intangible Assets and Liabilities

The values of intangible lease assets and liabilities are determined based on assumptions made at the time of acquisition and have defined useful lives that correspond with the lease terms. There may be instances in which intangible lease assets and liabilities become impaired, and we are required to write off the remaining asset or liability immediately or over a shorter period of time. Lease restructurings, including lease terminations and lease extensions, may impact the value and useful life of in-place leases. In-place leases that are terminated, partially terminated, or modified will be evaluated for impairment if the original in-place lease terms have been modified. In the event that the discounted cash flows of the original in-place lease stream do not exceed the discounted modified in-place lease stream, we adjust the carrying value of the intangible lease assets to the discounted cash flows and recognize an impairment loss. For in-place lease extensions that are executed more than one year prior to the original in-place lease expiration date, the useful life of the in-place lease will be extended over the new lease term with the exception of those in-place lease components, such as lease commissions and tenant

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allowances, which have been renegotiated for the extended term. Renegotiated in-place lease components, such as lease commissions and tenant allowances, will be amortized over the shorter of the useful life of the asset or the new lease term.

Intangible Assets and Liabilities Arising From In-Place Leases Where We Are the Lessee

In-place ground leases where we are the lessee may have positive or negative value associated with effective contractual rental rates that are above or below market at the time of acquisition or assumption. Such values are calculated based on the present value (using a discount rate that reflects the risks associated with the leases acquired) of the difference between (i) the contractual amounts to be paid pursuant to the in-place lease and (ii) management's estimate of fair market lease rates for the corresponding in-place lease at the time of execution or assumption. This calculation includes significantly below market renewal options for which exercise of the renewal option appears to be reasonably assured. These intangible assets and liabilities are measured over the actual or assumed (in the case of renewal options) remaining lease terms. The capitalized above-market and below-market in-place lease values are recorded as intangible lease liabilities and assets, respectively, and are amortized as an adjustment to property operating costs over the remaining term of the respective ground leases.

Revenue Recognition

The majority of our revenues are derived from leases and are reflected as lease revenues on the accompanying consolidated statements of operations. Lease revenues includes base rental income, tenant reimbursements, and lease termination fees. All of the leases on our assets are considered operating leases. Therefore, base rental income is generally recognized on a straight-line basis over the lease term, and tenant reimbursements are generally recognized in the period in which reimbursements for operating costs are billable to the tenant. Rents and tenant reimbursements collected in advance are recorded as deferred income on the accompanying consolidated balance sheets.

In determining when to begin recognizing rental revenues, we consider a number of factors, including the nature of the physical improvements made in connection with the lease. When we own the improvements for accounting purposes, revenue recognition generally begins once the improvements are substantially complete and the lessee has taken possession of the improved space. When we do not own the improvements for accounting purposes (the lessee is the owner), revenue recognition generally begins once the lessee takes possession of the unimproved space; in these instances, the tenant allowance is accounted for as a lease incentive, which reduces rental revenues over the lease term. When evaluating which party (lessee or lessor) owns the improvements for accounting purposes, we consider a number of factors, including, among other things: whether the lease stipulates what the tenant allowance may be used for; whether the lessee or lessor retains legal title to the improvements; the expected economic life of the improvements relative to the lease term; and who directs the construction of the improvements. The determination of who owns the improvements for accounting purposes is subject to significant judgement and is not based on any one factor.

Related-Party Transactions and Agreements

During 2019, 2018, and 2017, we did not have any related party transactions, except as described in Note 4, Unconsolidated Joint Ventures, of the accompanying consolidated financial statements.

Commitments and Contingencies

We are subject to certain commitments and contingencies with regard to certain transactions. Refer to Note 7, Commitments and Contingencies, to the accompanying consolidated financial statements for further explanation. Examples of such commitments and contingencies include:

•guaranties related to the debt of unconsolidated joint ventures;

•obligations under operating leases;

•obligations under capital leases;

•commitments under existing lease agreements; and

•litigation.

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Subsequent Events

We have evaluated subsequent events in connection with the preparation of our consolidated financial statements and notes thereto included in this report on Form 10-K and noted the following items in addition to those disclosed elsewhere in this report:

On January 24, 2020, Columbia Property Trust acquired Normandy Real Estate Management, LLC, a developer, operator, and investment manager of office and mixed-use assets in New York, Boston, and Washington, D.C. for approximately $100.0 million, exclusive of transaction and closing costs (the "Normandy Acquisition"). The purchase price for the Normandy Acquisition is comprised of two components: an approximately $13.5 million cash payment, and the issuance of 3,264,151 Series A Convertible, Perpetual Preferred Units of Columbia OP with a liquidation preference of $26.50 per unit (the "Preferred OP Units"). The Preferred OP Units are convertible into common units of Columbia OP, which are convertible into shares of Columbia Property Trust's common stock, subject to certain terms and conditions. After giving effect to the Preferred OP Units issued in the Normandy Acquisition, Columbia Property Trust owns approximately 97.2% of the limited partnership interests in Columbia OP.

We also note the following other subsequent events:

•On February 7, 2020, the board of directors declared dividends for the first quarter of 2020 of $0.21 per share, payable on March 17, 2020, to stockholders of record on March 2, 2020.

•On January 24, 2020, in connection with the Normandy Acquisition, we issued 128,399 of time-based award shares and 104,968 of performance-based award restricted stock units to Normandy employees that became employees of Columbia Property Trust.

•On January 16, 2020, we closed on the sale of Cranberry Woods Drive for $180.0 million and anticipate recognizing a gain on sale of real estate assets in the first quarter of 2020.

•On January 7, 2020, Columbia Property Trust paid an aggregate amount of $24.2 million in dividends for the fourth quarter of 2019 to stockholders of record on December 16, 2019.

ITEM 7A. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

As a result of certain of our outstanding debt facilities, we are exposed to interest rate changes. Our interest rate risk management objectives are to limit the impact of interest rate changes on earnings and cash flow, primarily through a low to moderate level of overall borrowings. We manage our ratio of fixed- to floating-rate debt with the objective of achieving a mix that we believe is appropriate in light of anticipated changes. We closely monitor interest rates and will continue to consider the sources and terms of our borrowing facilities to determine whether we have appropriately guarded ourselves against the risk of increasing interest rates in future periods. Fluctuations in LIBOR may affect the amount of interest expense we incur on borrowings indexed to LIBOR, such as borrowings under the Revolving Credit Facility, which currently bears interest at the applicable LIBOR rate, as defined in the credit agreements, plus an applicable margin that is subject to adjustment based on our credit ratings.

Additionally, we have entered into interest rate swaps and may enter into other interest rate swaps, caps, or other arrangements to mitigate our interest rate risk on a related financial instrument. We do not enter into derivative or interest rate transactions for speculative purposes; however, certain of our derivatives may not qualify for hedge accounting treatment. All of our debt was entered into for other-than-trading purposes. As of December 31, 2019 and 2018, the estimated fair value of our consolidated line of credit and notes payable and bonds was $1.5 billion and $1.3 billion, respectively.

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Our financial instruments, including bonds payable, consist of both fixed- and variable-rate debt. As of December 31, 2019, our debt consisted of the following, which includes our ownership share of debt at unconsolidated joint ventures, in thousands:

	2020			2021			2022			2023			2024			Thereafter			Total
Maturing Debt:
Effectively variable-rate debt	$	—		$	56,259		$	—		$	334,000		$	—		$	—		$	390,259
Effectively fixed-rate debt	$	—		$	—		$	150,000		$	165,750		$	300,000		$	700,000		$	1,315,750
Average Interest Rate:
Effectively variable-rate debt	—		%	5.96		%	—		%	2.52		%	—		%	—		%	3.02		%
Effectively fixed-rate debt	—		%	—		%	3.07		%	5.07		%	2.55		%	3.90		%	3.64		%

Our consolidated, variable-rate borrowings consist of the Revolving Credit Facility, the $300 Million Term Loan, and the $150 Million Term Loan. However, only the Revolving Credit Facility bears interest at effectively variable rates, as the variable rates on the $300 Million Term Loan and the $150 Million Term Loan have been effectively fixed through the interest rate swap agreements described herein.

As of December 31, 2019, our consolidated debt consisted of $334.0 million outstanding borrowings under the Revolving Credit Facility, $300.0 million outstanding on the $300 Million Term Loan, $150.0 million outstanding on the $150 Million Term Loan, $349.1 million in 2026 Bonds Payable outstanding, and $349.7 million in 2025 Bonds Payable outstanding. The amounts outstanding on our Revolving Credit Facility in the future will largely depend upon future acquisition and disposition activities. The weighted-average interest rate on all of our consolidated debt instruments was 3.23% as of December 31, 2019.

Approximately $1,148.9 million of our consolidated debt outstanding as of December 31, 2019, is subject to fixed rates, either directly or when coupled with an interest rate swap agreement. As of December 31, 2019, these balances incurred interest expense at an average interest rate of 3.44% and have expirations ranging from 2022 through 2026. A change in the market interest rate impacts the net financial instrument position of our fixed-rate debt portfolio; however, it has no impact on interest incurred or cash flows.

Approximately $334.0 million of our consolidated debt outstanding as of December 31, 2019, is subject to variable rates. As of December 31, 2019, this balance incurred interest expense at an interest rate of 2.52% and expires in 2023. An increase or decrease of 100 basis points would have a $3.3 million annual impact on our interest payments. The amounts outstanding on our variable-rate debt facilities in the future will largely depend upon future acquisition and disposition activity and other financing activities.

Our unconsolidated borrowings consist of a fixed-rate mortgage note and a variable-rate construction note. Our Market Square Joint Venture holds a $325 million mortgage note, which bears interest at a fixed rate of 5.07%; and our 799 Broadway Joint Venture holds a $113.2 million construction note, which bears interest at a floating rate of 5.96% as of December 31, 2019. Adjusting for our ownership share of the debt at these unconsolidated joint ventures, our weighted-average interest rate of all of our debt instruments is 3.50%.

ITEM 8.  FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA

The financial statements and supplementary data filed as part of this report are set forth beginning on page F-1 of this report.

ITEM 9.CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND FINANCIAL DISCLOSURE

There were no disagreements with our independent registered public accountants during 2019, 2018, or 2017.

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ITEM 9A.CONTROLS AND PROCEDURES

Columbia Property Trust, Inc.

Management's Conclusions Regarding the Effectiveness of Disclosure Controls and Procedures

We carried out an evaluation, under the supervision and with the participation of management, including the Principal Executive Officer and Principal Financial Officer, of the effectiveness of the design and operation of Columbia Property Trust's disclosure controls and procedures pursuant to Rule 13a-15(e) under the Exchange Act as of the end of the period covered by this report. Based upon that evaluation, the Principal Executive Officer and Principal Financial Officer concluded that Columbia Property Trust's disclosure controls and procedures were effective as of the end of the period covered by this report in providing a reasonable level of assurance that information we are required to disclose in reports that we file or submit under the Exchange Act is recorded, processed, summarized, and reported within the time periods in SEC rules and forms, including providing a reasonable level of assurance that information required to be disclosed by us in such reports is accumulated and communicated to our management, including our Principal Executive Officer and our Principal Financial Officer, as appropriate, to allow timely decisions regarding required disclosure.

Report of Management on Internal Control Over Financial Reporting

Management of Columbia Property Trust is responsible for establishing and maintaining adequate internal control over financial reporting, as defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act, as a process designed by, or under the supervision of, the Principal Executive Officer and Principal Financial Officer and effected by our management and other personnel to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with GAAP and includes those policies and procedures that:

•pertain to the maintenance of records that in reasonable detail accurately and fairly reflect the transactions and disposition of our assets;

•provide reasonable assurance that the transactions are recorded as necessary to permit preparation of financial statements in accordance with GAAP, and that our receipts and expenditures are being made only in accordance with authorizations of management and/or members of the board of directors; and

•provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of our assets that could have a material effect on the financial statements.

Because of the inherent limitations of internal control over financial reporting, including the possibility of human error and the circumvention or overriding of controls, material misstatements may not be prevented or detected on a timely basis. In addition, projections of any evaluation of effectiveness to future periods are subject to the risks that controls may become inadequate because of changes and conditions or that the degree of compliance with policies or procedures may deteriorate. Accordingly, even internal controls determined to be effective can provide only reasonable assurance that the information required to be disclosed in reports filed under the Exchange Act is recorded, processed, summarized, and represented within the time periods required.

Management of Columbia Property Trust has assessed the effectiveness of Columbia Property Trust's internal control over financial reporting at December 31, 2019. To make this assessment, we used the criteria for effective internal control over financial reporting described in the Internal Control – Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission. Based on this assessment, our management believes that Columbia Property Trust's system of internal control over financial reporting met those criteria, and therefore our management has concluded that we maintained effective internal control over financial reporting as of December 31, 2019.

The report of Columbia Property Trust's independent registered public accounting firm on internal control over financial reporting for Columbia Property Trust is included in Part IV, Item 15, of this annual report on Form 10-K and is incorporated herein by reference.

51

Changes in Internal Control Over Financial Reporting

There have been no changes in Columbia Property Trust’s internal control over financial reporting during the quarter ended December 31, 2019, that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

Columbia Property Trust Operating Partnership, L.P.

Management's Conclusions Regarding the Effectiveness of Disclosure Controls and Procedures

Columbia Property Trust, the general partner and sole owner of Columbia OP, carried out an evaluation, under the supervision and with the participation of management, including the Principal Executive Officer and Principal Financial Officer, of the effectiveness of the design and operation of Columbia OP's disclosure controls and procedures pursuant to Rule 13a-15(e) under the Exchange Act as of the end of the period covered by this report. Based upon that evaluation, the Principal Executive Officer and Principal Financial Officer concluded that Columbia OP's disclosure controls and procedures were effective as of the end of the period covered by this report in providing a reasonable level of assurance that information we are required to disclose in reports that we file or submit under the Exchange Act is recorded, processed, summarized, and reported within the time periods in SEC rules and forms, including providing a reasonable level of assurance that information required to be disclosed by us in such reports is accumulated and communicated to our management, including our Principal Executive Officer and our Principal Financial Officer, as appropriate, to allow timely decisions regarding required disclosure.

Report of Management on Internal Control Over Financial Reporting

Management of Columbia Property Trust, as the general partner and sole owner of Columbia OP, is responsible for establishing and maintaining adequate internal control over financial reporting for Columbia OP, as defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act. The Principal Executive Officer and Principal Financial Officer of Columbia Property Trust, along with management and other personnel, have designed and supervised the financial reporting process to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with GAAP and includes those policies and procedures that:

•pertain to the maintenance of records that in reasonable detail accurately and fairly reflect the transactions and disposition of our assets;

•provide reasonable assurance that the transactions are recorded as necessary to permit preparation of financial statements in accordance with GAAP, and that our receipts and expenditures are being made only in accordance with authorizations of management and/or members of the board of directors; and

•provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of our assets that could have a material effect on the financial statements.

Because of the inherent limitations of internal control over financial reporting, including the possibility of human error and the circumvention or overriding of controls, material misstatements may not be prevented or detected on a timely basis. In addition, projections of any evaluation of effectiveness to future periods are subject to the risks that controls may become inadequate because of changes and conditions or that the degree of compliance with policies or procedures may deteriorate. Accordingly, even internal controls determined to be effective can provide only reasonable assurance that the information required to be disclosed in reports filed under the Exchange Act is recorded, processed, summarized, and represented within the time periods required.

Management has assessed the effectiveness of Columbia OP's internal control over financial reporting at December 31, 2019. To make this assessment, we used the criteria for effective internal control over financial reporting described in the Internal Control – Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission. Based on this assessment, our management believes that Columbia OP's

52

system of internal control over financial reporting met those criteria, and therefore our management has concluded that we maintained effective internal control over financial reporting as of December 31, 2019.

The report of Columbia OP's independent registered public accounting firm on internal control over financial reporting for Columbia OP is included in Part IV, Item 15, of this annual report on Form 10-K and is incorporated herein by reference.

Changes in Internal Control Over Financial Reporting

There have been no changes in Columbia OP's internal control over financial reporting during the quarter ended December 31, 2019, that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

53

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the stockholders and the Board of Directors of Columbia Property Trust, Inc.:

Opinion on Internal Control over Financial Reporting

We have audited the internal control over financial reporting of Columbia Property Trust, Inc. and subsidiaries (the "Company") as of December 31, 2019, based on criteria established in Internal Control — Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO). In our opinion, the Company maintained, in all material respects, effective internal control over financial reporting as of December 31, 2019, based on criteria established in Internal Control — Integrated Framework (2013) issued by COSO.

We have also audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the consolidated financial statements and financial statement schedule as of and for the year ended December 31, 2019, of the Company and our report dated February 13, 2020, expressed an unqualified opinion on those financial statements.

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 Report of Management 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/ Deloitte & Touche LLP

Atlanta, Georgia

February 13, 2020

54

ITEM 9B.  OTHER INFORMATION

During the fourth quarter of 2019, there was no information that was required to be disclosed in a report on Form 8-K that was not disclosed in a report on Form 8-K.

55

PART III

We will file a definitive Proxy Statement for our 2020 Annual Meeting of Stockholders (the "2020 Proxy Statement") with the SEC, pursuant to Regulation 14A, not later than 120 days after the end of our fiscal year. Accordingly, certain information required by Part III has been omitted under General Instruction G(3) to Form 10-K. Only those sections of the 2020 Proxy Statement that specifically address the items required to be set forth herein are incorporated by reference.

ITEM 10.DIRECTORS, EXECUTIVE OFFICERS, AND CORPORATE GOVERNANCE

We have adopted a Code of Ethics that applies to all of our executive officers and directors, including but not limited to, our principal executive officer and principal financial officer. Our Code of Ethics may be found at www.columbia.reit. Any amendments to, or waivers of, the Code of Ethics for our principal executive officer, principal financial officer, principal accounting officer, controller, or persons performing similar functions will be disclosed on our website promptly following the date of such amendment or waiver.

The other information required by this Item is incorporated by reference from our 2020 Proxy Statement.

ITEM 11.EXECUTIVE COMPENSATION

The information required by this Item is incorporated by reference from our 2020 Proxy Statement.

ITEM 12.SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT AND RELATED SHAREHOLDER MATTERS

See the table below for securities authorized to be issued under our equity compensation plan as of December 31, 2019. The other information required by this Item is incorporated by reference from our 2020 Proxy Statement.

Plan Category	Number of Securities to Be Issued Upon  Exercise of Outstanding Options, Warrants, and Rights	Weighted-Average Exercise Price of Outstanding Options, Warrants, and Rights		Common Stock Issued Under the LTI Plan	Number of Securities Remaining Available  for Future Issuance Under Equity Compensation Plans
Equity compensation plans approved by security holders	—	$	—	2,130,296	2,669,704
Equity compensation plans not approved by security holders	—	—		—	—
Total	—	$	—	2,130,296	2,669,704

ITEM 13. CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS, AND DIRECTOR INDEPENDENCE

The information required by this Item is incorporated by reference from our 2020 Proxy Statement.

ITEM 14. PRINCIPAL ACCOUNTANT FEES AND SERVICES

The information required by this Item is incorporated by reference from our 2020 Proxy Statement.

56

PART IV

ITEM 15. EXHIBITS AND FINANCIAL STATEMENT SCHEDULES

(a) 1. A list of the financial statements contained herein is set forth on page F-1 hereof.

(a) 2. Schedule III – Real Estate Assets and Accumulated Depreciation

Information with respect to this item begins on page S-1 hereof. Other schedules are omitted because of the absence of conditions under which they are required or because the required information is given in the financial statements or notes thereto.

(a) 3. The Exhibits filed in response to Item 601 of Regulation S-K are listed on the Exhibit Index attached hereto.

(b) See (a) 3 above.

(c) See (a) 2 above.

EXHIBIT INDEX TO

2019 FORM 10-K OF

COLUMBIA PROPERTY TRUST, INC.

COLUMBIA PROPERTY TRUST OPERATING PARTNERSHIP, L.P.

The following documents are filed as exhibits to this report. Exhibits that are not required for this report are omitted.

Ex.	Description
3.1	Second Amended and Restated Articles of Incorporation as Amended by the First Articles of Amendment (incorporated by reference to Exhibit 3.1 to the Company's Annual Report on Form 10-K filed with the Commission on March 1, 2013).
3.2	Second Articles of Amendment (incorporated by reference to Exhibit 3.1 to the Company's Current Report on Form 8-K filed with the Commission on August 15, 2013).
3.3	Third Articles of Amendment (incorporated by reference to Exhibit 3.2 to the Company's Current Report on Form 8-K filed with the Commission on August 15, 2013).
3.4	Fourth Articles of Amendment (incorporated by reference to Exhibit 3.1 to the Company's Current Report on Form 8-K filed with the Commission on July 1, 2014).
3.5	Fifth Articles of Amendment (incorporated by reference to Exhibit 3.1 to the Company's Current Report on Form 8-K filed with the Commission on May 3, 2017).
3.6	Articles Supplementary (incorporated by reference to Exhibit 3.1 to the Company's Current Report on Form 8-K filed with the Commission on September 4, 2013).
3.7	Fourth Amended and Restated Bylaws (incorporated by reference to Exhibit 3.1 to the Company's Current Report on Form 8-K filed with the Commission on March 7, 2019).
3.8	Amended and Restated Agreement of Limited Partnership of Columbia Property Trust Operating Partnership, L.P. (incorporated by reference to the Company's Current Report on Form 8-K filed with the Commission on January 27, 2020)
4.1	Statement regarding restrictions on transferability of shares of common stock (to appear on stock certificate or to be sent upon request and without charge to stockholders issued shares without certificates) (incorporated by reference to Exhibit 4.1 to the Company's Annual Report on Form 10-K filed with the Commission on March 1, 2013).
4.2	Indenture, dated March 12, 2015 (incorporated by reference to Exhibit 4.1 to the Company's Current Report on Form 8-K filed with the Commission on March 12, 2015).
4.3	Supplemental Indenture, dated March 12, 2015 (incorporated by reference to Exhibit 4.2 to the Company's Current Report on Form 8-K filed with the Commission on March 12, 2015).
4.4	Form of 4.150% Senior Notes due 2025 (incorporated by reference to in Exhibit 4.3 to the Company's Current Report on Form 8-K filed with the Commission on March 12, 2015).
4.5	Supplemental Indenture, dated August 12, 2016 (incorporated by reference to Exhibit 4.1 to the Company's Current Report on Form 8-K filed with the Commission on August 12, 2016).
4.6	Form of 3.650% Senior Notes due 2026 (incorporated by reference to Exhibit 4.2 to the Company's Current Report on Form 8-K filed with the Commission on August 12, 2016).
4.7*	Description of Registrant's securities.

57

Ex.	Description
10.1	Supplemental Indenture dated as of February 3, 2012, among Wells Operating Partnership II, L.P., the Guarantors Party Hereto, and U.S. Bank National Association, as Trustee (incorporated by reference to Exhibit 10.3 to the Company's Quarterly Report on Form 10-Q filed with the Commission on May 4, 2012).
10.2	Columbia Property Trust, Inc. Amended and Restated 2013 Long-Term Incentive Plan (incorporated by reference to Exhibit A to the Company's Proxy Statement for its 2017 Annual Meeting of Stockholders filed with the Commission on March 17, 2017).
10.3+	Form of Restricted Stock Award Agreement under the Columbia Property Trust, Inc. Long-Term Incentive Plan (incorporated by reference to Exhibit 10.1 to the Company's Current Report on Form 8-K filed with the Commission on January 24, 2014).
10.4+	Columbia Property Trust Executive Change in Control Plan (incorporated by reference to Exhibit 10.1 to the Company's Current Report on From 8-K filed with the Commission on December 19, 2016).
10.5+	Form of 2018 Restricted Stock Award (Time-Based) under the Columbia Property Trust Inc. Amended and Restated 2013 Long-Term Incentive Plan (incorporated by reference to Exhibit 10.6 to the Company's Annual Report on From 10-K filed with the Commission on February 15, 2018).
10.6+	Form of 2018 Restricted Stock Award (Performance-Based) under the Columbia Property Trust Inc. Amended and Restated 2013 Long-Term Incentive Plan (incorporated by reference to Exhibit 10.7 to the Company's Annual Report on From 10-K filed with the Commission on February 15, 2018).
10.7	Investor Services Agreement between the Company and Wells Real Estate Funds, Inc. dated February 28, 2013, and effective as of March 1, 2013 (incorporated by reference to Exhibit 10.3 to the Company's Quarterly Report on Form 10-Q filed with the Commission on May 8, 2013).
10.8	Consulting Services Agreement between the Company and Wells Real Estate Funds, Inc. dated February 28, 2013, and effective as of March 1, 2013 (incorporated by reference to Exhibit 10.4 to the Company's Quarterly Report on Form 10-Q filed with the Commission on May 8, 2013).
10.9	Assignment and Assumption Agreement between Wells Real Estate Funds, Inc. to Wells Operating Partnership II, L.P., dated as of February 28, 2013 (related to Wells Real Estate Advisory Services II, LLC) (incorporated by reference to Exhibit 10.5 to the Company's Quarterly Report on Form 10-Q filed with the Commission on May 8, 2013).
10.10	Assignment and Assumption Agreement between Wells Real Estate Funds, Inc. to Wells Operating Partnership II, L.P. dated as of February 28, 2013 (related to Wells Real Estate Services, LLC) (incorporated by reference to Exhibit 10.6 to the Company's Quarterly Report on Form 10-Q filed with the Commission on May 8, 2013).
10.11	Term Loan Agreement, dated July 30, 2015, by and among Columbia Property Trust Operating Partnership, L.P., as borrower; the financial institutions party thereto, as lenders; Wells Fargo Bank, National Association, as administrative agent; Wells Fargo Securities, LLC, Regions Capital Markets and U.S. Bank National Association, as joint lead arrangers and joint bookrunners; Regions Bank and U.S. National Association, as syndication agents; and PNC Bank, National Association, as documentation agent (incorporated by reference to Exhibit 10.2 to the Company's Quarterly Report on Form 10-Q filed with the Commission on October 29, 2015).
10.12	First Amendment to $150 Million Term Loan Agreement, dated as of July 25, 2017, by and among Columbia Property Trust Operating Partnership, L.P., as borrower; the financial institutions party thereto, as lenders; Wells Fargo Bank, National Association, as administrative agent; Wells Fargo Securities, LLC, Regions Capital Markets, and U.S. Bank National Association, as joint lead arrangers and joint bookrunners; Regions Bank and U.S. National Association, as syndication agents; and PNC Bank, National Association, as documentation agent (incorporated by reference to Exhibit 10.2 to the Company's Quarterly Report on Form 10-Q filed with the Commission on October 26, 2017).
10.13	Term Loan Agreement dated as of November 27, 2017, by and among Columbia Property Trust Operating Partnership, L.P., as borrower; JPMorgan Chase Bank, N.A., as joint lead arranger and sole bookrunner; PNC Capital Markets LLC, Regions Capital Markets, SunTrust Robinson Humphrey, Inc., U.S. Bank National Association, and Wells Fargo Securities LLC, as joint lead arrangers; JPMorgan Chase Bank, N.A., as administrative agent; PNC Bank, National Association, Regions Bank, SunTrust Bank, U.S. Bank National Association, and Wells Fargo Bank, National Association as documentation agents; and each of the financial institutions a signatory thereto, as lenders.
10.14	Amended and Restated Revolving Credit and Term Loan Agreement, dated as of December 7, 2018, by and among Columbia Property Trust Operating Partnership, L.P., as borrower; JPMorgan Chase Bank, N.A., as administrative agent; PNC Bank, National Association as syndication agent for the Revolving Credit Facility; U.S. Bank National Association and Wells Fargo Bank, N.A. as co-documentation agents for the Revolving Credit Facility; BMO Harris Bank, N.A., Regions Bank, and SunTrust Bank, as syndication agents for the Term Loan Facility; JPMorgan Chase Bank, N.A., PNC Capital Markets LLC, U.S. Bank National Association, and Wells Fargo Securities LLC as joint lead arrangers and joint bookrunners for the Revolving Credit Facility; and SunTrust Robinson Humphrey, Inc., Regions Capital Markets, and Bank of Montreal as joint lead arrangers and joint bookrunners for the Term Loan Facility.
10.15	Registration Rights Agreement, dated January 24, 2020, by and among Columbia Property Trust, Inc. and each of the parties listed on the signature pages thereto (incorporated by reference to the Company's Current Report on Form 8-K filed with the Commission on January 27, 2020)
21.1*	Subsidiaries of Columbia Property Trust, Inc.
23.1*	Consent of Deloitte & Touche LLP – Columbia Property Trust, Inc. and Columbia Property Trust Operating Partnership, L.P.
31.1*	Certification of the Principal Executive Officer of the Company, pursuant to Securities Exchange Act Rules 13a-14(a) as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 – Columbia Property Trust, Inc.
31.2*	Certification of the Principal Financial Officer of the Company, pursuant to Securities Exchange Act Rules 13a-14(a) as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 – Columbia Property Trust, Inc.

58

Ex.	Description
31.3*	Certification of the Principal Executive Officer of the Company, pursuant to Securities Exchange Act Rules 13a-14(a) as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 – Columbia Property Trust Operating Partnership, L.P.
31.4*	Certification of the Principal Financial Officer of the Company, pursuant to Securities Exchange Act Rules 13a-14(a) as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 – Columbia Property Trust Operating Partnership, L.P.
32.1*	Certification of the Principal Executive Officer and Principal Financial Officer of the Company, pursuant to 18 U.S.C. Section 1350 as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 – Columbia Property Trust, Inc.
32.2*	Certification of the Principal Executive Officer and Principal Financial Officer of the Company, pursuant to 18 U.S.C. Section 1350 as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 – Columbia Property Trust Operating Partnership, L.P.
101.INS	XBRL Instance Document.
101.SCH	XBRL Taxonomy Extension Schema.
101.CAL	XBRL Taxonomy Extension Calculation Linkbase.
101.DEF	XBRL Taxonomy Extension Definition Linkbase.
101.LAB	XBRL Taxonomy Extension Label Linkbase.
101.PRE	XBRL Taxonomy Extension Presentation Linkbase.
104.1	Cover Page Interactive Data File (formatted as Inline XBRL and contained in Exhibit 101
*	Filed herewith.
+	Identifies each management contract or compensatory plan required to be filed.

59

SIGNATURES

Pursuant to the requirements of Section 13 or 15 (b) of the Securities Exchange Act of 1934, as amended, each Registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

		COLUMBIA PROPERTY TRUST, INC. (Registrant)
Dated:	February 13, 2020	By:	/s/ James A. Fleming
			JAMES A. FLEMING Executive Vice President and Chief Financial Officer (Principal Financial Officer)
Dated:	February 13, 2020		/s/ Wendy W. Gill
			WENDY W. GILL Senior Vice President and Chief Accounting Officer (Principal Accounting Officer)

		COLUMBIA PROPERTY TRUST OPERATING PARTNERSHIP, L.P. (Registrant) By: Columbia Property Trust, its sole general partner
Dated:	February 13, 2020	By:	/s/ James A. Fleming
			JAMES A. FLEMING Executive Vice President and Chief Financial Officer (Principal Financial Officer)
Dated:	February 13, 2020		/s/ Wendy W. Gill
			WENDY W. GILL Senior Vice President and Chief Accounting Officer (Principal Accounting Officer)

60

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 each registrant and in the capacities and on the dates indicated.

Signature	Capacity*	Date
/s/ Carmen M. Bowser	Independent Director	February 13, 2020
Carmen M. Bowser
/s/ John L. Dixon	Independent Director	February 13, 2020
John L. Dixon
/s/ David B. Henry	Independent Director	February 13, 2020
David B. Henry
/s/ Murray J. McCabe	Independent Director	February 13, 2020
Murray J. McCabe
/s/ E. Nelson Mills	President, Chief Executive Officer and Director (Principal Executive Officer)	February 13, 2020
E. Nelson Mills
/s/ Constance B. Moore	Independent Director	February 13, 2020
Constance B. Moore
/s/ Michael S. Robb	Independent Director	February 13, 2020
Michael S. Robb
/s/ George W. Sands	Independent Director	February 13, 2020
George W. Sands
/s/ Thomas G. Wattles	Independent Director	February 13, 2020
Thomas G. Wattles

*Each person is signing in his or her capacity as an officer and/or director of Columbia Property Trust, Inc., which is the sole general partner of Columbia Property Trust Operating Partnership, L.P.

61

INDEX TO CONSOLIDATED FINANCIAL STATEMENTS

Columbia Property Trust, Inc. Financial Statements	Page
Report of Independent Registered Public Accounting Firm	F-2
Consolidated Balance Sheets as of December 31, 2019 and 2018	F-4
Consolidated Statements of Operations for the Years Ended December 31, 2019, 2018, and 2017	F-5
Consolidated Statements of Comprehensive Income for the Years Ended December 31, 2019, 2018, and 2017	F-6
Consolidated Statements of Equity for the Years Ended December 31, 2019, 2018, and 2017	F-7
Consolidated Statements of Cash Flows for the Years Ended December 31, 2019, 2018, and 2017	F-8
Columbia Property Trust Operating Partnership, L.P. Financial Statements
Report of Independent Registered Public Accounting Firm	F-9
Consolidated Balance Sheets as of December 31, 2019 and 2018	F-10
Consolidated Statements of Operations for the Years Ended December 31, 2019, 2018, and 2017	F-11
Consolidated Statements of Comprehensive Income for the Years Ended December 31, 2019, 2018, and 2017	F-12
Consolidated Statements of Equity for the Years Ended December 31, 2019, 2018, and 2017	F-13
Consolidated Statements of Cash Flows for the Years Ended December 31, 2019, 2018, and 2017	F-14
Columbia Property Trust, Inc. & Columbia Property Trust Operating Partnership, L.P.
Notes to Consolidated Financial Statements	F-15
Schedule III Real Estate and Accumulated Depreciation	S-1

F-1

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the shareholders and the Board of Directors of Columbia Property Trust, Inc.

Opinion on the Financial Statements

We have audited the accompanying consolidated balance sheets of Columbia Property Trust, Inc. and subsidiaries (the "Company") as of December 31, 2019 and 2018, the related consolidated statements of operations, comprehensive income, equity, and cash flows, for each of the three years in the period ended December 31, 2019, and the related notes and the schedule listed in the Index at Item 15(a)(2) (collectively referred to as the "financial statements"). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 2019 and 2018, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2019, in conformity with accounting principles generally accepted in the United States of America.

We have also 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, 2019, based on criteria established in Internal Control — Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission and our report dated February 13, 2020, expressed an unqualified opinion on the Company's internal control over financial reporting.

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.

Critical Audit Matter

The critical audit matter communicated below is a matter arising from the current-period audit of the financial statements that was communicated or required to be communicated to the Audit Committee and that (1) relates to accounts or disclosures that are material to the financial statements and (2) involved our especially challenging, subjective, or complex judgments. The communication of critical audit matters does not alter in any way our opinion on the financial statements, taken as a whole, and we are not, by communicating the critical audit matter below, providing a separate opinion on the critical audit matter or on the accounts or disclosures to which it relates.

Lease Revenues – Refer to Note 2 (Revenue Recognition) to the financial statements

Critical Audit Matter Description

Lease revenues includes base rental income, tenant reimbursements, and lease termination fees. Base rental income is generally recognized on a straight-line basis over the lease term. The timing of revenue recognition is impacted by whether the Company or the lessee owns the physical improvements made in connection with each lease. In

F-2

determining whether the Company or the lessee is the owner of such improvements, the Company considers several factors based on each lease arrangement, including whether the lease stipulates what the tenant allowance may be used for; whether the lessee or lessor retains legal title to the improvements; the expected economic life of the improvements relative to the lease term; and which party directs the construction of the improvements.

The determination of whether the Company or the lessee owns the improvements for accounting purposes is subject to significant judgment and is not based on any one factor. Auditing management’s determination of these matters often is complex and requires subjective judgment.

How the Critical Audit Matter Was Addressed in the Audit

Our audit procedures related to management’s determination of the owner of the tenant improvements, and the related impact on the timing and amount of revenue recognition, included the following, among others:

•We tested the effectiveness of controls over revenue recognition, including those controls over the evaluation of the ownership of tenant improvements, and the timing and amounts of rental revenues to be recognized over the term of the related lease.

•We selected a sample of lease agreements and performed the following to evaluate the appropriateness of the determination of the ownership of the tenant improvements and the related impact on the timing and amount of revenue recognition:

◦Evaluated the reasonableness and consistency of the factors considered by management to determine the owner of the tenant improvements and compared such factors to the terms in the lease agreement or other supporting documents.

◦Tested tenant improvement costs, including the amounts funded by the Company or the tenant, by reconciling the amounts recorded by the Company to invoices or other supporting documents and evaluated whether the costs were consistent with the terms of the lease agreement and the Company’s ownership determination.

◦Tested the timing of and amounts recognized as base rental income by independently calculating such rental income amounts to be recognized and comparing it to the amounts recorded by the Company.

/s/ Deloitte & Touche LLP

Atlanta, Georgia

February 13, 2020

We have served as the Company's auditor since 2008.

F-3

COLUMBIA PROPERTY TRUST, INC.

CONSOLIDATED BALANCE SHEETS

(in thousands, except share and per-share amounts)

	December 31,
	2019		2018
Assets:
Real Estate Assets, at Cost:
Land	$	870,352	$	817,975
Buildings and improvements, less accumulated depreciation of $281,248 and $403,355, as of December 31, 2019 and 2018, respectively	1,719,207		1,910,041
Intangible lease assets, less accumulated amortization of $58,659 and $84,881, as of December 31, 2019 and 2018, respectively	61,025		98,540
Construction in progress	53,621		33,800
Real estate assets held for sale, less accumulated depreciation and amortization of $80,543 as of December 31, 2019	214,956		—
Total real estate assets	2,919,161		2,860,356
Operating lease assets	29,470		—
Investments in unconsolidated joint ventures	1,054,460		1,071,353
Cash and cash equivalents	12,303		17,118
Tenant receivables, net of allowance for doubtful accounts of $4 as of December 31, 2018	2,464		3,258
Straight-line rent receivable	77,330		87,159
Prepaid expenses and other assets	21,484		23,218
Intangible lease origination costs, less accumulated amortization of $33,731 and $65,348, as of December 31, 2019 and 2018, respectively	27,971		34,092
Deferred lease costs, less accumulated amortization of $16,732 and $27,735, as of December 31, 2019 and 2018, respectively	76,385		77,439
Other assets held for sale, less accumulated amortization of $10,222 as of December 31, 2019	23,917		—
Total assets	$	4,244,945	$	4,173,993
Liabilities:
Line of credit and notes payable, net of deferred financing costs of $2,084 and $2,692, as of December 31, 2019 and 2018, respectively	$	781,916	$	629,308
Bonds payable, net of discount of $1,124 and $1,304 and deferred financing costs of $3,552 and $4,158, as of December 31, 2019 and 2018, respectively	695,324		694,538
Operating lease liabilities	2,186		—
Accounts payable, accrued expenses, and accrued capital expenditures	70,845		49,117
Dividends payable	24,209		23,340
Deferred income	16,955		15,593
Intangible lease liabilities, less accumulated amortization of $15,127 and $21,766, as of December 31, 2019 and 2018, respectively	21,839		21,081
Liabilities held for sale	3,054		—
Total liabilities	1,616,328		1,432,977
Commitments and Contingencies (Note 7)	—		—
Equity:
Common stock, $0.01 par value, 225,000,000 shares authorized, 115,280,597 and 116,698,033 shares issued and outstanding as of December 31, 2019 and 2018, respectively	1,153		1,167
Additional paid-in capital	4,392,322		4,421,587
Cumulative distributions in excess of earnings	(1,769,234)		(1,684,082)
Accumulated other comprehensive income (loss)	(1,101)		2,344
Total stockholders' equity attributable to Columbia Property Trust	2,623,140		2,741,016
Noncontrolling interest in consolidated joint venture	5,477		—
Total equity	2,628,617		2,741,016
Total liabilities and equity	$	4,244,945	$	4,173,993

See accompanying notes.

F-4

COLUMBIA PROPERTY TRUST, INC.

CONSOLIDATED STATEMENTS OF OPERATIONS

(in thousands, except per-share amounts)

	Years Ended December 31,
	2019		2018		2017
Revenues:
Lease revenues	$	276,149	$	283,252	$	280,570
Hotel income	—		—		1,339
Asset and property management fee income	7,544		7,384		3,782
Other property income	5,144		7,307		3,309
	288,837		297,943		289,000
Expenses:
Property operating costs	93,275		88,813		87,805
Hotel operating costs	—		—		2,089
Asset and property management fee expenses	629		854		918
Depreciation	78,292		81,795		80,394
Amortization	27,908		32,554		32,403
Impairment loss on real estate assets	43,941		30,812		—
General and administrative – corporate	32,779		32,979		34,966
General and administrative – joint venture	3,567		3,108		1,454
Pre-acquisition costs (Note 16)	6,398		—		—
	286,789		270,915		240,029
Other Income (Expense):
Interest expense	(43,170)		(56,499)		(60,516)
Gain (loss) on extinguishment of debt	—		23,340		(325)
Interest and other income	173		6,894		9,529
Gain on sale of unconsolidated joint venture interests	—		762		—
Income tax benefit (expense)	(21)		(37)		213
Income from unconsolidated joint ventures	8,004		8,003		2,651
Gains on sales of real estate assets	42,030		—		175,518
	7,016		(17,537)		127,070
Net income	9,064		9,491		176,041
Less: net loss attributable to non-controlling interest in consolidated joint venture	133		—		—
Net income attributable to common stockholders	$	9,197	$	9,491	$	176,041
Per-Share Information – Basic:
Net income attributable to common stockholders	$	0.08	$	0.08	$	1.45
Weighted-average common shares outstanding	116,261		117,888		120,795
Per-Share Information – Diluted:
Net income attributable to common stockholders	$	0.08	$	0.08	$	1.45
Weighted-average common shares outstanding	116,458		118,311		121,159

See accompanying notes.

F-5

COLUMBIA PROPERTY TRUST, INC.

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

(in thousands)

	Years Ended December 31,
	2019		2018		2017
Net income	$	9,064	$	9,491	$	176,041
Market value adjustment to interest rate swaps	(3,445)		1,441		1,786
Comprehensive income	5,619		10,932		177,827
Less: net loss attributable to non-controlling interest in consolidated joint venture	133		—		—
Comprehensive income attributable to common stockholders	$	5,752	$	10,932	$	177,827

See accompanying notes.

F-6

COLUMBIA PROPERTY TRUST, INC.

CONSOLIDATED STATEMENTS OF EQUITY

(in thousands, except per-share amounts)

	Stockholders' Equity
	Common Stock			Additional Paid-In Capital		Cumulative Distributions in Excess of Earnings		Accumulated Other Comprehensive Income (Loss)		Total		Noncontrolling Interests		Total Equity
	Shares	Amount
Balance, December 31, 2016	122,184	$	1,221	$	4,538,912	$	(2,036,482)	$	(883)	$	2,502,768	$	—	$	2,502,768
Repurchases of common stock	(2,682)	(26)		(57,602)		—		—		(57,628)		—		(57,628)
Common stock issued to employees and directors, and amortized (net of income tax witholdings)	287	3		5,761		—		—		5,764		—		5,764
Distributions to common stockholders ($0.80 per share)	—	—		—		(96,795)		—		(96,795)		—		(96,795)
Net income	—	—		—		176,041		—		176,041		—		176,041
Market value adjustment to interest rate swap	—	—		—		—		1,786		1,786		—		1,786
Balance, December 31, 2017	119,789	1,198		4,487,071		(1,957,236)		903		2,531,936		—		2,531,936
Cumulative-effect adjustment for the adoption of ASU 2017-05	—	—		—		357,755		—		357,755		—		357,755
Cumulative-effect adjustment for the adoption of ASU 2014-09	—	—		—		343		—		343		—		343
Repurchases of common stock	(3,240)	(32)		(70,488)		—		—		(70,520)		—		(70,520)
Common stock issued to employees and directors, and amortized (net of income tax witholdings)	149	1		5,004		—		—		5,005		—		5,005
Distributions to common stockholders ($0.80 per share)	—	—		—		(94,435)		—		(94,435)		—		(94,435)
Net income	—	—		—		9,491		—		9,491		—		9,491
Market value adjustment to interest rate swap	—	—		—		—		1,441		1,441		—		1,441
Balance, December 31, 2018	116,698	1,167		4,421,587		(1,684,082)		2,344		2,741,016		—		2,741,016
Repurchases of common stock	(1,616)	(16)		(33,500)		—		—		(33,516)		—		(33,516)
Common stock issued to employees and directors, and amortized (net of income tax witholdings)	198	2		4,235		—		—		4,237		—		4,237
Distributions to common stockholders ($0.81 per share)	—	—		—		(94,349)		—		(94,349)		—		(94,349)
Contributions from noncontrolling interest in consolidated joint venture	—	—		—		—		—		—		5,610		5,610
Allocation of net income (loss)	—	—		—		9,197		—		9,197		(133)		9,064
Market value adjustment to interest rate swap	—	—		—		—		(3,445)		(3,445)		—		(3,445)
Balance, December 31, 2019	115,280	$	1,153	$	4,392,322	$	(1,769,234)	$	(1,101)	$	2,623,140	$	5,477	$	2,628,617

See accompanying notes.

F-7

COLUMBIA PROPERTY TRUST, INC.

CONSOLIDATED STATEMENTS OF CASH FLOWS

(in thousands)

	Years Ended December 31,
	2019		2018		2017
Cash Flows From Operating Activities:
Net income	$	9,064	$	9,491	$	176,041
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities:
Straight-line rental income	(13,230)		(25,952)		(32,737)
Noncash operating lease expense	720		—		—
Depreciation	78,292		81,795		80,394
Amortization	23,546		29,401		31,907
Impairment loss on real estate assets	43,941		30,812		—
Noncash interest expense	2,562		3,103		3,009
(Gain) loss on extinguishment of debt	—		(23,340)		325
Gains on sales of real estate assets	(42,030)		—		(175,518)
Income from unconsolidated joint ventures	(8,004)		(8,003)		(2,651)
Distributions of earnings from unconsolidated joint ventures	27,977		28,802		3,681
Gain on sale of unconsolidated joint venture interest	—		(762)		—
Stock-based compensation expense	6,622		6,966		7,580
Changes in Assets and Liabilities, Net of Acquisitions and Dispositions:
Decrease (increase) in tenant receivables, net	697		(2,947)		4,222
Decrease (increase) in prepaid expenses and other assets	(1,539)		7,871		(1,754)
Decrease (increase) in accounts payable and accrued expenses	5,560		(36,724)		(28,133)
Increase (decrease) in deferred income	3,265		(2,888)		(4,442)
Net cash provided by operating activities	137,443		97,625		61,924
Cash Flows From Investing Activities:
Net proceeds from the sale of real estate	375,004		284,608		737,631
Net proceeds from the sale of investments in unconsolidated joint ventures	—		235,083		—
Real estate acquisitions and prepaid transaction costs	(453,128)		(23,034)		(604,769)
Capital improvements and development costs	(66,994)		(71,033)		(86,805)
Deferred lease costs paid	(22,307)		(24,816)		(26,722)
Investments in unconsolidated joint ventures	(17,134)		(38,763)		(369,043)
Distributions in excess of earnings from unconsolidated joint ventures	14,250		13,685		1,985
Net cash provided by (used in) investing activities	(170,309)		375,730		(347,723)
Cash Flows From Financing Activities:
Financing costs paid	(162)		(5,078)		(1,269)
Proceeds from lines of credit and notes payable	802,000		579,000		783,000
Repayments of lines of credit and notes payable	(650,000)		(872,175)		(533,427)
Distributions paid to stockholders	(93,480)		(95,056)		(109,561)
Redemptions of common stock	(35,917)		(72,495)		(59,462)
Contribution from noncontrolling interest in consolidated joint venture	5,610		—		—
Net cash provided by (used in) financing activities	28,051		(465,804)		79,281
Net increase (decrease) in cash and cash equivalents	(4,815)		7,551		(206,518)
Cash and cash equivalents, beginning of period	17,118		9,567		216,085
Cash and cash equivalents, end of period	$	12,303	$	17,118	$	9,567

See accompanying notes.

F-8

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the Unit Holders and the General Partner of Columbia Property Trust Operating Partnership, L.P.

Opinion on the Financial Statements

We have audited the accompanying consolidated balance sheets of Columbia Property Trust Operating Partnership, L.P. and subsidiaries (the "Partnership") as of December 31, 2019 and 2018, the related consolidated statements of operations, comprehensive income, equity, and cash flows, for each of the three years in the period ended December 31, 2019, and the related notes and the schedule listed in the Index at Item 15(a)(2) (collectively referred to as the "financial statements"). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Partnership as of December 31, 2019 and 2018, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2019, in conformity with accounting principles generally accepted in the United States of America.

Basis for Opinion

These financial statements are the responsibility of the Partnership's management. Our responsibility is to express an opinion on the Partnership's financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to the 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. The Partnership is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. As part of our audits, we are required to obtain an understanding of internal control over financial reporting but not for the purpose of expressing an opinion on the effectiveness of the Partnership’s internal control over financial reporting. Accordingly, we express no such opinion.

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/Deloitte & Touche LLP

Atlanta, Georgia

February 13, 2020

We have served as the Partnership's auditor since 2019.

F-9

COLUMBIA PROPERTY TRUST OPERATING PARTNERSHIP, L.P.

CONSOLIDATED BALANCE SHEETS

(in thousands, except share and per-share amounts)

	December 31,
	2019		2018
Assets:
Real Estate Assets, at Cost:
Land	$	843,546	$	775,656
Buildings and improvements, less accumulated depreciation of $252,034 and $324,426, as of December 31, 2019 and 2018, respectively	1,668,358		1,720,271
Intangible lease assets, less accumulated amortization of $58,658 and $84,881, as of December 31, 2019 and 2018, respectively	61,025		98,540
Construction in progress	51,240		32,526
Real estate assets held for sale, less accumulated depreciation and amortization of $22,464 as of December 31, 2019	69,274		—
Total real estate assets	2,693,443		2,626,993
Operating lease assets	27,843		—
Investments in unconsolidated joint ventures	1,054,460		1,071,353
Cash and cash equivalents	9,522		10,931
Tenant receivables, net of allowance for doubtful accounts of $4 as of December 31, 2018	2,039		2,956
Straight-line rent receivable	70,985		71,675
Prepaid expenses and other assets	21,044		21,680
Intangible lease origination costs, less accumulated amortization of $33,731 and $65,348, as of December 31, 2019 and 2018, respectively	27,971		34,092
Deferred lease costs, less accumulated amortization of $14,272 and $19,342, as of December 31, 2019 and 2018, respectively	73,699		65,484
Other assets held for sale, less accumulated amortization of $3,971 as of December 31, 2019	5,573		—
Total assets	$	3,986,579	$	3,905,164
Liabilities:
Line of credit and notes payable, net of deferred financing costs of $2,084 and $2,692, as of December 31, 2019 and 2018, respectively	$	781,916	629,308
Bonds payable, net of discount of $1,124 and $1,304 and deferred financing costs of $3,552 and $4,158, as of December 31, 2019 and 2018, respectively	695,324		694,538
Accounts payable, accrued expenses, and accrued capital expenditures	68,535		36,133
Due to affiliates	140,444		141,145
Deferred income	16,299		13,245
Intangible lease liabilities, less accumulated amortization of $15,127 and $21,766, as of December 31, 2019 and 2018, respectively	21,839		21,081
Liabilities held for sale as of December 31, 2019	1,809		—
Total liabilities	1,726,166		1,535,450
Commitments and Contingencies (Note 7)	—		—
Partners' Capital:
Columbia Property Trust, Inc.	2,254,936		2,369,714
Noncontrolling interest in consolidated joint venture	5,477		—
Total capital	2,260,413		2,369,714
Total liabilities and capital	$	3,986,579	$	3,905,164

See accompanying notes.

F-10

COLUMBIA PROPERTY TRUST OPERATING PARTNERSHIP, L.P.

CONSOLIDATED STATEMENTS OF OPERATIONS

(in thousands, except per-share amounts)

	Years Ended December 31,
	2019		2018		2017
Revenues:
Lease revenues	$	248,838	$	254,988	$	252,149
Other property income	99		1,323		(609)
	248,937		256,311		251,540
Expenses:
Property operating costs	82,205		77,526		77,719
Asset and property management fee expenses	3,952		3,856		3,977
Depreciation	67,773		71,934		72,010
Amortization	26,663		31,451		31,035
Impairment loss on real estate assets	43,941		30,812		—
General and administrative – corporate	7,927		9,469		9,232
General and administrative – joint venture	43		—		—
Pre-acquisition expenses	4,160		—		—
	236,664		225,048		193,973
Other Income (Expense):
Interest expense	(49,470)		(66,046)		(73,877)
Gain (loss) on extinguishment of debt	—		23,340		(325)
Interest and other income	64		6,894		6,784
Gain on sale of unconsolidated joint venture interests	—		762		—
Income tax benefit (expense)	—		—		(3)
Income from unconsolidated joint ventures	8,004		8,003		2,651
Gains on sales of real estate assets	42,030		—		170,733
	628		(27,047)		105,963
Net income	12,901		4,216		163,530
Less: net loss attributable to non-controlling interest in consolidated joint venture	133		—		—
Net income attributable to Columbia Property Trust, Inc.	13,034		4,216		163,530

See accompanying notes.

F-11

COLUMBIA PROPERTY TRUST OPERATING PARTNERSHIP, L.P.

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

(in thousands)

	Years Ended December 31,
	2019		2018		2017
Net income	12,901		4,216		163,530
Market value adjustment to interest rate swap	(3,445)		1,441		1,786
Comprehensive income	9,456		5,657		165,316
Less: net loss attributable to non-controlling interest in consolidated joint venture	133		—		—
Comprehensive income attributable to Columbia Property Trust, Inc.	$	9,589	$	5,657	$	165,316

See accompanying notes.

F-12

COLUMBIA PROPERTY TRUST OPERATING PARTNERSHIP, L.P.

CONSOLIDATED STATEMENTS OF CAPITAL

(in thousands, except per-share amounts)

	Columbia Property Trust, Inc.		Noncontrolling Interest		Total Capital
Balance, December 31, 2016	$	1,768,862	$	—	$	1,768,862
Contributions	296,083		—		296,083
Distributions	(234,241)		—		(234,241)
Net income	163,530		—		163,530
Market value adjustment to interest rate swap	1,786		—		1,786
Balance, December 31, 2017	1,996,020		—		1,996,020
Cumulative-effect adjustment for the adoption of ASU 2017-05	357,755		—		357,755
Contributions	177,833		—		177,833
Distributions	(167,551)		—		(167,551)
Net income	4,216		—		4,216
Market value adjustment to interest rate swap	1,441		—		1,441
Balance, December 31, 2018	2,369,714		—		2,369,714
Contributions	12,053		5,610		17,663
Distributions	(136,420)		—		(136,420)
Net income	13,034		(133)		12,901
Market value adjustment to interest rate swap	(3,445)		—		(3,445)
Balance, December 31, 2019	$	2,254,936	$	5,477	$	2,260,413

See accompanying notes.

F-13

COLUMBIA PROPERTY TRUST OPERATING PARTNERSHIP, L.P.

CONSOLIDATED STATEMENTS OF CASH FLOWS

(in thousands)

	Years Ended December 31,
	2019		2018		2017
Cash Flows From Operating Activities:
Net income	$	12,901	$	4,216	$	163,530
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities:
Straight-line rental income	(12,077)		(22,654)		(29,790)
Noncash operating lease expense	836		—		—
Depreciation	67,773		71,934		72,010
Amortization	22,177		28,185		30,376
Impairment loss on real estate assets	43,941		30,812		—
Noncash interest expense	2,562		3,103		3,009
(Gain) loss on extinguishment of debt	—		(23,340)		325
Gains on sales of real estate assets	(42,030)		—		(170,733)
(Income) loss from unconsolidated joint ventures	(8,004)		(8,003)		(2,651)
Distributions of earnings from unconsolidated joint ventures	27,977		28,802		3,681
Gain on sale of unconsolidated joint venture interest	—		(762)		—
Changes in Assets and Liabilities, Net of Acquisitions and Dispositions:
Decrease (increase) in tenant receivables, net	918		(2,842)		4,111
Decrease (increase) in prepaid expenses and other assets	(1,662)		7,341		(1,001)
Increase (decrease) in accounts payable and accrued expenses	3,489		(35,708)		(29,032)
Increase (decrease) in deferred income	3,712		(1,919)		(4,056)
Net cash provided by operating activities	122,513		79,165		39,779
Cash Flows From Investing Activities:
Net proceeds from the sale of real estate	375,004		284,608		618,199
Net proceeds from the sale of investments in unconsolidated joint ventures	—		235,083		—
Real estate acquisitions	(453,128)		(23,034)		(604,769)
Capital improvements and development costs	(65,961)		(65,810)		(53,480)
Deferred lease costs paid	(22,667)		(25,364)		(26,710)
Investments in unconsolidated joint ventures	(17,134)		(38,763)		(369,043)
Distributions in excess of earnings from unconsolidated joint ventures	14,250		13,685		1,985
Net cash provided by (used in) investing activities	(169,636)		380,405		(433,818)
Cash Flows From Financing Activities:
Financing costs paid	(162)		(5,078)		(1,269)
Proceeds from lines of credit and notes payable	802,000		579,000		783,000
Repayments of lines of credit and notes payable	(650,000)		(872,175)		(533,427)
Contributions from Columbia Property Trust	17,663		11,912		296,083
Distributions to Columbia Property Trust	(129,397)		(167,551)		(169,023)
Contributions from noncontrolling interest in consolidated joint venture	5,610		—		—
Net cash provided by (used in) financing activities	45,714		(453,892)		375,364
Net increase (decrease) in cash and cash equivalents	(1,409)		5,678		(18,675)
Cash and cash equivalents, beginning of period	10,931		5,253		23,928
Cash and cash equivalents, end of period	$	9,522	$	10,931	$	5,253

See accompanying notes.

F-14

COLUMBIA PROPERTY TRUST, INC.

COLUMBIA PROPERTY TRUST OPERATING PARTNERSHIP, L.P.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

DECEMBER 31, 2019, 2018, AND 2017

1.Organization

Columbia Property Trust, Inc. ("Columbia Property Trust") (NYSE: CXP) is a Maryland corporation that operates as a real estate investment trust ("REIT") for federal income tax purposes and owns and operates commercial real estate properties. Columbia Property Trust conducts business primarily through Columbia Property Trust Operating Partnership, L.P. ("Columbia OP"), a Delaware limited partnership in which Columbia Property Trust is the general partner and sole owner as of December 31, 2019. Columbia Property Trust acquires, develops, redevelops, owns, leases, and operates real properties directly and through wholly and partially owned subsidiaries and joint ventures. Unless stated otherwise or the context otherwise requires, references to "Columbia Property Trust," "the Company," "we," "us," and "our" shall mean, collectively, Columbia Property Trust, Columbia OP, and the entities consolidated by both Columbia Property Trust and Columbia OP; and references to "Columbia OP" shall mean Columbia OP and the entities consolidated by Columbia OP.

As of December 31, 2019, the Company owned 17 operating properties and three properties under development or redevelopment, of which 13 were wholly owned and seven were owned through joint ventures, located primarily in New York, San Francisco, and Washington, D.C. As of December 31, 2019 the operating properties contained a total of 7.3 million rentable square feet and were approximately 97.1% leased.

2. Summary of Significant Accounting Policies

Basis of Presentation

The accompanying consolidated financial statements are prepared in conformity with accounting principles generally accepted in the United States of America ("GAAP"), which require us to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting periods. Actual results could differ from those estimates.

Columbia Property Trust's consolidated financial statements include the accounts of Columbia Property Trust, Columbia OP, and their consolidated subsidiaries. Columbia OP's consolidated financial statements include the accounts of Columbia OP, and its consolidated subsidiaries. We consolidate any variable interest entity ("VIE") in which we are deemed the primary beneficiary. With respect to entities that are not VIEs, our consolidated financial statements also include the accounts of any entity in which we own a controlling financial interest, and any limited partnership in which we own a controlling general partnership interest. In determining whether Columbia Property Trust or Columbia OP owns a controlling interest, the following factors are considered, among other things: the ownership of voting interests, protective rights, and participatory rights of the investors.

All intercompany balances and transactions have been eliminated in consolidation.

Use of Estimates

The preparation of the consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported in the accompanying consolidated financial statements and the accompanying notes. Actual results could differ from those estimates.

Fair Value Measurements

Columbia Property Trust estimates the fair value of its assets and liabilities (where currently required under GAAP) consistent with the provisions of Accounting Standard Codification 820, Fair Value Measurements ("ASC 820"). Under this standard, fair value is defined as the price that would be received upon sale of an asset or paid upon transfer of a liability in an orderly transaction between market participants at the measurement date. While

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various techniques and assumptions can be used to estimate fair value depending on the nature of the asset or liability, the accounting standard for fair value measurements and disclosures provides the following fair value technique parameters and hierarchy, depending upon availability:

Level 1 – Assets or liabilities for which the identical term is traded on an active exchange, such as publicly traded instruments or futures contracts.

Level 2 – Assets and liabilities valued based on observable market data for similar instruments.

Level 3 – Assets or liabilities for which significant valuation assumptions are not readily observable in the market. Such assets or liabilities are valued based on the best available data, some of which may be internally developed. Significant assumptions may include risk premiums that a market participant would consider.

Real Estate Assets

Real estate assets are stated at cost, less accumulated depreciation and amortization. Amounts capitalized to real estate assets consist of the cost of acquisition or construction, and any tenant improvements or major improvements that extend the useful life of the related asset. All repairs and maintenance costs are expensed as incurred.

Columbia Property Trust is required to make subjective assessments as to the useful lives of its depreciable assets. To determine the appropriate useful life of an asset, Columbia Property Trust considers the period of future benefit of the asset. These assessments have a direct impact on net income. The estimated useful lives of its assets by class are as follows:

Buildings	40 years
Building and site improvements	5-25 years
Tenant improvements	Shorter of economic life or lease term
Intangible lease assets	Lease term

As further described in Note 5, Line of Credit and Notes Payable, Columbia Property Trust capitalizes interest incurred on outstanding debt balances as well as joint venture investments, as appropriate, during development or redevelopment of real estate held directly or in joint ventures. During 2019 and 2018, $5.1 million and $3.8 million of interest was capitalized to construction in progress, respectively; and $1.3 million and $0.2 million of interest was capitalized to investments in unconsolidated joint ventures, respectively.

Assets Held for Sale

Columbia Property Trust classifies properties as held for sale according to Accounting Standard Codification 360, Accounting for the Impairment or Disposal of Long-Lived Assets ("ASC 360"). According to ASC 360, properties having separately identifiable operations and cash flows, are considered held for sale when the following criteria are met:

•Management, having the authority to approve the action, commits to a plan to sell the property.

•The property is available for immediate sale in its present condition, subject only to terms that are usual and customary for sales of such property.

•An active program to locate a buyer and other actions required to complete the plan to sell the property have been initiated.

•The property is being actively marketed for sale at a price that is reasonable in relation to its current fair value.

•Actions required to complete the plan indicate that it is unlikely that significant changes to the plan will be made or that the plan will be withdrawn.

•The sale of the property is probable and transfer of the property is expected to qualify for recognition as a completed sale, within one year.

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At such time that a property is determined to be held for sale, its carrying amount is adjusted to the lower of its depreciated book value or its estimated fair value, less costs to sell, and depreciation is no longer recognized; and assets and liabilities are required to be classified as held for sale on the accompanying consolidated balance sheet. As of December 31, 2019, Cranberry Woods Drive and Pasadena Corporate Park met the aforementioned criteria; thus, these properties are classified as held for sale in the accompanying consolidated balance sheets. The sale of Cranberry Woods closed on January 16, 2020. As of December 31, 2018, none of Columbia Property Trust's properties met the criteria to be classified as held for sale in the accompanying consolidated balance sheet.

The major classes of assets and liabilities classified as held for sale are provided below (in thousands):

	December 31, 2019
Real Estate Assets Held for Sale:
Real estate assets, at cost:
Land	$	57,117
Buildings and improvements, less accumulated depreciation of $80,543	157,701
Construction in progress	138
Total real estate assets held for sale, net	$	214,956
Other Assets Held for Sale:
Tenant receivables	$	156
Straight-line rent receivable	12,591
Prepaid expenses and other assets	334
Deferred lease costs, less accumulated amortization of $10,222	10,836
Total other assets held for sale, net	$	23,917
Liabilities Held for Sale:
Accounts payable, accrued expenses, and accrued capital expenditures	$	1,151
Deferred income	1,903
Total liabilities held for sale	$	3,054

Evaluating the Recoverability of Real Estate Assets

Columbia Property Trust continually monitors events and changes in circumstances that could indicate that the net carrying amounts of its real estate and related intangible assets and liabilities, of both operating properties and properties under redevelopment, may not be recoverable. When indicators of potential impairment are present that suggest that the net carrying amounts of real estate assets and related intangible assets and liabilities may not be recoverable, Columbia Property Trust assesses the recoverability of these net assets by determining whether the respective carrying values will be recovered through the estimated undiscounted future cash flows expected from the use of the net assets and their eventual disposition. In the event that such expected undiscounted future cash flows do not exceed the carrying values, Columbia Property Trust adjusts the carrying values of the real estate assets and related intangible assets and liabilities to the estimated fair values, pursuant to the property, plant, and equipment accounting standard for the impairment or disposal of long-lived assets, and recognizes an impairment loss. At such time that a property is required to be classified as held for sale, its net carrying amount is adjusted to the lower of its depreciated book value or its estimated fair value, less costs to sell, and depreciation is no longer recognized.

Estimated fair values are calculated based on the following hierarchy of information: (i) recently quoted market prices, (ii) market prices for comparable properties, or (iii) the present value of future cash flows, including estimated residual value. Projections of expected future operating cash flows require that Columbia Property Trust estimate future market rental income amounts subsequent to the expiration of current lease agreements, property operating expenses, the number of months it takes to re-lease the property, and the number of years the property is held for investment, among other factors. Due to the inherent subjectivity of the assumptions used to project future cash flows, estimated fair values may differ from the values that would be realized in market transactions. Certain of

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Columbia Property Trust's assets may be carried at an amount that exceeds that which could be realized in a current disposition transaction. Columbia Property Trust has determined that the carrying values of its real estate assets and related intangible assets are recoverable as of December 31, 2019.

In the fourth quarter of 2019, Columbia Property Trust recorded an impairment loss of $20.6 million on Pasadena Corporate Park. Upon deciding to exit the Los Angeles market, Columbia Property Trust began to market for sale its only asset therein, Pasadena Corporate Park, in the fourth quarter of 2019. In January 2020, Columbia Property Trust entered into a contract to sell Pasadena Corporate Park, and anticipates closing on the sale in the first quarter of 2020. As a result, as of December 31,2019, Columbia Property Trust reduced the carrying value of Pasadena Corporate Park to reflect its estimated fair value of $74.5 million, determined based on estimated net sale proceeds (Level 1), by recording an impairment loss of $20.6 million.

In the third quarter of 2019, Columbia Property Trust recognized an impairment loss of $23.4 million as a result of changing its holding period expectations for Lindbergh Center in Atlanta, Georgia. Columbia Property Trust entered into a contract to sell Lindbergh Center in the third quarter of 2019, and closed the sale on September 26, 2019. As a result, Columbia Property Trust reduced the carrying value of Lindbergh Center to reflect its estimated fair value, based on the estimated net sale proceeds of $181.0 million (Level 1), by recording an impairment loss of $23.4 million in the third quarter of 2019.

In the second quarter of 2018, Columbia Property Trust recognized an impairment loss of $30.8 million in connection with changing the holding period expectations for 222 East 41st Street in New York. Columbia Property Trust widely marketed this property for sale during the second quarter and, as a result, entered into an agreement to sell this property on May 25, 2018 and closed on the sale on May 29, 2018. Upon entering into the sale agreement, Columbia Property Trust reduced 222 East 41st Street's carrying value to reflect its fair value, estimated based on the net contract price of $284.6 million (Level 1), by recording an impairment loss of $30.8 million in the second quarter of 2018.

Allocation of Purchase Price of Acquired Assets

Upon the acquisition of real properties, Columbia Property Trust allocates the purchase price of properties and related transaction costs to tangible assets, consisting of land, building, site improvements, and identified intangible assets and liabilities, including the value of in-place leases, based in each case on Columbia Property Trust's estimate of their fair values in accordance with ASC 820 (see "Fair Value Measurements" section above for additional details). In conjunction with certain acquisitions, Columbia Property Trust has entered into master lease agreements, which obligate the seller to pay rent pertaining to certain nonrevenue-producing spaces to mitigate the negative effects of lower rental revenues. Columbia Property Trust records payments receivable under such master lease agreements as a reduction of the property basis rather than income. Columbia Property Trust received no proceeds for master leases during 2019, 2018, or 2017.

The fair values of the tangible assets of an acquired property (which includes land, building, and site improvements) are determined by valuing the property as if it were vacant, and the "as-if-vacant" value is then allocated to land, building, and site improvements based on management's determination of the relative fair value of these assets. Management determines the as-if-vacant fair value of a property using methods similar to those used by independent appraisers. Factors considered by management in performing these analyses include an estimate of carrying costs during the expected lease-up periods considering current market conditions and costs to execute similar leases, including leasing commissions and other related costs. In estimating carrying costs, management includes real estate taxes, insurance, and other operating expenses during the expected lease-up periods based on current market demand.

Intangible Assets and Liabilities Arising From In-Place Leases Where Columbia Property Trust Is the Lessor

As further described below, in-place leases with Columbia Property Trust as the lessor may have values related to direct costs associated with obtaining a new tenant that are avoided for in-place leases, opportunity costs associated with lost rentals that are avoided by acquiring an in-place lease, tenant relationships, and effective contractual rental rates that are above or below market:

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•Direct costs associated with obtaining a new tenant that are avoided for in-place leases, including commissions, tenant improvement allowances, and other direct costs, are estimated based on management's consideration of current market costs to execute a similar lease. Such direct costs are included in intangible lease origination costs in the accompanying consolidated balance sheets and are amortized to expense over the remaining terms of the respective leases.

•The value of opportunity costs associated with lost rentals avoided by acquiring an in-place lease is calculated based on contractual amounts to be paid pursuant to the in-place leases over a market absorption period for a similar lease. Such opportunity costs ("Absorption Period Costs") are included in intangible lease assets in the accompanying consolidated balance sheets and are amortized to expense over the remaining terms of the respective leases.

•The value of effective rental rates of in-place leases that are above or below the market rates of comparable leases is calculated based on the present value (using a discount rate that reflects the risks associated with the leases acquired) of the difference between (i) the contractual amounts to be received pursuant to the in-place leases and (ii) management's estimate of fair market lease rates for the corresponding in-place leases. This calculation includes significantly below-market renewal options for which exercise of the renewal option appears to be reasonably assured. These intangible assets or liabilities are measured over the actual or assumed (in the case of renewal options) remaining lease terms. The capitalized above-market and below-market lease values are recorded as intangible lease assets or liabilities and amortized as an adjustment to rental income over the remaining terms of the respective leases.

As of December 31, 2019 and 2018, Columbia Property Trust had the following gross intangible in-place lease assets and liabilities (in thousands):

		Intangible Lease Assets				Intangible Lease Origination Costs		Intangible Below-Market In-Place Lease Liabilities
		Above-Market In-Place Lease Assets		Absorption Period Costs
December 31, 2019	Gross	$	2,481	$	117,203	$	61,702	$	36,966
	Accumulated Amortization	(1,202)		(57,457)		(33,731)		(15,127)
	Net	$	1,279	$	59,746	$	27,971	$	21,839
December 31, 2018	Gross	$	3,174	$	147,668	$	99,440	$	42,847
	Accumulated Amortization	(1,060)		(81,220)		(65,348)		(21,766)
	Net	$	2,114	$	66,448	$	34,092	$	21,081

During 2019, 2018, and 2017, Columbia Property Trust recognized the following amortization of intangible lease assets and liabilities (in thousands):

	Intangible Lease Assets				Intangible Lease Origination Costs		Intangible Below-Market In-Place Lease Liabilities
	Above-Market In-Place Lease Assets		Absorption Period Costs
For the Years Ended December 31,
2019	$	288	$	13,511	$	7,398	$	5,395
2018	$	228	$	17,137	$	9,660	$	6,851
2017	$	519	$	16,807	$	10,124	$	6,883

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The remaining net intangible assets and liabilities as of December 31, 2019, will be amortized as follows (in thousands):

	Intangible Lease Assets				Intangible Lease Origination Costs		Intangible Below-Market In-Place Lease Liabilities
	Above-Market In-Place Lease Assets		Absorption Period Costs
For the Years Ending December 31,
2020	$	172	$	12,871	$	5,866	$	5,483
2021	172		9,328		4,516		3,191
2022	172		7,959		3,429		2,910
2023	172		6,455		2,903		2,336
2024	172		5,594		2,586		1,990
Thereafter	419		17,539		8,671		5,929
	$	1,279	$	59,746	$	27,971	$	21,839
Weighted-average amortization period	6.6 years		5.0 years		4.9 years		5.3 years

Intangible Assets and Liabilities Arising From In-Place Leases Where Columbia Property Trust Is the Lessee

As of December 31, 2018, Columbia Property Trust had gross below-market lease assets of approximately $32.6 million, net of accumulated amortization of $2.6 million. These below-market lease assets were reclassified to operating lease assets upon adoption of ASC 842, effective January 1, 2019, as described in the "Recent Accounting Pronouncements" section below (see Note 10, Leases, for additional information).

Cash and Cash Equivalents

Columbia Property Trust considers all highly liquid investments purchased with an original maturity of three months or less to be cash equivalents. Cash equivalents may include cash and short-term investments. Short-term investments are stated at cost, which approximates fair value as of December 31, 2019 and 2018.

Tenant Receivables

Tenant receivables consist of rental and reimbursement billings due from tenants. Tenant receivables are recorded at the original amount earned, which approximates fair value. Management assesses the realizability of tenant receivables on an ongoing basis, and, if at any point during the term of a lease it is determined that the collectability of a tenant receivable is not probable, such receivable is written off against lease revenues. During 2019, $22,000 in receivables were written off against lease revenues. Prior to the adoption of ASC 842 on January 1, 2019, Columbia Property Trust recorded an allowance for doubtful accounts when a tenant receivable became uncollectible by recording a provision for doubtful accounts, net of recoveries, in general and administrative – corporate expenses. For 2018, $63,000 of such expenses were recorded to general and administrative – corporate expenses.

Straight-Line Rent Receivable

Straight-line rent receivable reflects the amount of cumulative adjustments necessary to present rental income on a straight-line basis. Columbia Property Trust recognizes rental revenues on a straight-line basis, ratably over the term of each lease; however, leases often provide for payment terms that differ from the revenue recognized. When the amount of cash billed is less than the amount of revenue recognized, typically early in the lease, straight-line rent receivable is recorded for the difference. The receivable is depleted during periods later in the lease when the amount of cash paid by the tenant is greater than the amount of revenue recognized.

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Prepaid Expenses and Other Assets

Prepaid expenses and other assets primarily include earnest money deposits, escrow accounts held by lenders to pay future real estate taxes, insurance and tenant improvements, notes receivable, nontenant receivables, prepaid taxes, insurance and operating costs, unamortized deferred financing costs related to the line of credit (the "Revolving Credit Facility"), interest rate swaps (when in an asset position), certain corporate assets, and deferred tax assets. Prepaid expenses are recognized over the period to which the good or service relates. Other assets are written off when the asset no longer has future value, or when the company is no longer obligated for the corresponding liability.

Deferred Financing Costs

Deferred financing costs include costs incurred to secure debt from third-party lenders. Deferred financing costs, except for costs related to the Revolving Credit Facility, are presented as a direct reduction to the carrying amount of the related debt for all periods presented. Deferred financing costs related to the Revolving Credit Facility are included in prepaid expenses and other assets. Columbia Property Trust recognized amortization of deferred financing costs for the years ended December 31, 2019, 2018, and 2017 of approximately $2.4 million, $2.9 million, and $2.8 million, respectively, which is included in interest expense in the accompanying consolidated statements of operations.

Deferred Lease Costs

Deferred lease costs include costs incurred to procure leases that are paid to third parties or tenants, and incentives that are provided to tenants under the terms of their leases. These costs are capitalized and amortized on a straight-line basis over the terms of the lease. Amortization of third-party leasing costs is reflected as amortization expense, and amortization of lease incentives is reflected as an adjustment to rental income. During 2019, 2018, and 2017, Columbia Property Trust recognized amortization expense for deferred lease costs of $6.3 million, $5.5 million, and $5.2 million, respectively. During 2019, 2018, and 2017, Columbia Property Trust recognized adjustments to rental income for amortization of deferred lease costs of $0.7 million, $2.1 million, and $3.3 million, respectively. Upon receiving notification of a tenant's intention to terminate a lease, unamortized deferred lease costs are amortized over the shortened lease period.

Accounts Payable, Accrued Expenses, and Accrued Capital Expenditures

Accounts payable, accrued expenses, and accrued capital expenditures primarily include payables related to property operations, capital projects, and interest rate swaps (when in a liability position).

Line of Credit and Notes Payable

When debt is assumed, Columbia Property Trust records the loan at fair value. The fair value adjustment is amortized to interest expense over the term of the loan using the effective interest method. As described in the "Deferred Financing Costs" section above, line of credit and notes payable is presented on the accompanying consolidated balance sheet net of deferred financing costs related to term loans and notes payable of $2.1 million and $2.7 million as of December 31, 2019 and December 31, 2018, respectively.

Bonds Payable

Columbia OP has two series of bonds outstanding as of December 31, 2019 and 2018: $350 million of its 10-year unsecured 3.650% senior notes issued at 99.626% of their face value (the "2026 Bonds Payable"); and $350.0 million of its 10-year unsecured 4.150% senior notes issued at 99.859% of their face value (the "2025 Bonds Payable"). The discount on the 2026 Bonds Payable and the 2025 Bonds Payable is amortized to interest expense over the term of the bonds using the effective-interest method.

As described in the "Deferred Financing Costs" section above, bonds payable are presented on the accompanying consolidated balance sheet net of deferred financing costs related to bonds payable of $3.6 million and $4.2 million as of December 31, 2019 and December 31, 2018, respectively.

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Common Stock Repurchase Program

Columbia Property Trust is authorized to repurchase shares of its common stock, par value $0.01 per share, subject to certain limitations. As of December 31, 2019, $166.5 million remains available for repurchases under the current stock repurchase program. See Note 8, Stockholders' Equity and Partner's Capital, for additional details. Common stock repurchases are charged against equity as incurred, and the repurchased shares are retired.

Preferred Stock

Columbia Property Trust is authorized to issue up to 100.0 million shares of one or more classes or series of preferred stock with a par value of $0.01 per share. Columbia Property Trust's board of directors may determine the relative rights, preferences, and privileges of each class or series of preferred stock issued, which may be more beneficial than the rights, preferences, and privileges attributable to Columbia Property Trust's common stock. To date, Columbia Property Trust has not issued any shares of preferred stock.

Common Stock

The par value of Columbia Property Trust's issued and outstanding shares of common stock is classified as common stock, with the remainder allocated to additional paid-in capital.

Distributions

To maintain its status as a REIT, Columbia Property Trust is required by the Internal Revenue Code of 1986, as amended (the "Code"), to make distributions to stockholders each taxable year equal to at least 90% of its REIT taxable income, computed without regard to the dividends-paid deduction and by excluding net capital gains attributable to stockholders ("REIT taxable income"). To the extent that Columbia Property Trust satisfies the distribution requirement but distributes less than 100% of its REIT taxable income, Columbia Property Trust would be subject to federal and state corporate income tax on the undistributed income. Distributions to the stockholders are determined by the board of directors of Columbia Property Trust and are dependent upon a number of factors relating to Columbia Property Trust, including funds available for payment of distributions, financial condition, the timing of property acquisitions, capital expenditure requirements, and annual distribution requirements in order to maintain Columbia Property Trust's status as a REIT under the Code.

Noncontrolling Interests

Noncontrolling interests represent the equity interests of a consolidated joint venture that are not owned by Columbia Property Trust. Noncontrolling interests are adjusted for contributions, distributions, and earnings attributable to the noncontrolling interest holders of the consolidated joint venture. Earnings are allocated to joint venture partners using the hypothetical liquidation at book value method, based on the terms of the respective joint venture agreements, and are recorded as net income (loss) attributable to noncontrolling interests in the accompanying consolidated statements of operations. For 2019, all of Columbia Property Trust's noncontrolling interests relate to 101 Franklin Street, which was acquired on December 2, 2019. For additional information, see Note 3, Real Estate Transactions.

Interest Rate Swap Agreements

Columbia Property Trust enters into interest rate swap contracts to mitigate its interest rate risk on the related financial instruments. Columbia Property Trust does not enter into derivative or interest rate transactions for speculative purposes and currently does not have any derivatives that are not designated as hedges; however, certain of its derivatives may, at times, not qualify for hedge accounting treatment. Columbia Property Trust records the fair value of its interest rate swaps on its consolidated balance sheet either as prepaid expenses and other assets or as accounts payable, accrued expenses, and accrued capital expenditures. Changes in the fair value of interest rate swaps that are designated as cash flow hedges are recorded as other comprehensive income (loss). Changes in the fair value of interest rate swaps that do not qualify for hedge accounting treatment are recorded as gain or loss on interest rate swaps. Amounts received or paid under interest rate swap agreements are recorded as interest expense for contracts that qualify for hedge accounting treatment and as loss on interest rate swaps for contracts

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that do not qualify for hedge accounting treatment. As of December 31, 2019, Columbia Property Trust has two interest rate swaps, with an aggregate notional amount of $450.0 million. The following tables provide additional information related to Columbia Property Trust's interest rate swaps as of December 31, 2019 and 2018 (in thousands):

		Estimated Fair Value as of December 31,
Instrument Type	Balance Sheet Classification	2019		2018
Derivatives Designated as Hedging Instruments:
Interest rate contracts	Prepaid expenses and other assets	$	551	$	2,344
Interest rate contracts	Accounts payable	$	1,652	$	—

As a result of the interest rate contract in the above table, Columbia Property Trust estimates recognizing a reduction in interest expense of approximately $0.9 million over the next 12 months.

Columbia Property Trust applied the provisions of ASC 820 in recording its interest rate swaps at fair value. The fair values of the interest rate swaps, classified under Level 2, were determined using a third-party proprietary model that is based on prevailing market data for contracts with matching durations, current and anticipated London Interbank Offered Rate ("LIBOR") information, and reasonable estimates about relevant future market conditions. Columbia Property Trust has determined that the fair value, as determined by the third party, is reasonable.

	Years Ended December 31,
	2019		2018		2017
Market value adjustment to interest rate swaps designated as hedging instruments and included in other comprehensive income (loss)	$	(3,445)	$	1,441	$	1,786

Revenue Recognition

The majority of Columbia Property Trust’s revenues are derived from leases and are reflected as lease revenues on the accompanying consolidated statements of operations. For more information about Columbia Property Trust's lease revenue streams see Note 10, Leases.

In determining when to begin recognizing rental revenues, Columbia Property Trust considers a number of factors, including the nature of the physical improvements made in connection with the lease. When Columbia Property Trust owns the improvements for accounting purposes, revenue recognition generally begins once the improvements are substantially complete and the lessee has taken possession of the improved space. When Columbia Property Trust does not own the improvements for accounting purposes (the lessee is the owner), revenue recognition generally begins once the lessee takes possession of the unimproved space; in these instances, the tenant allowance is accounted for as a lease incentive, which reduces rental revenues over the lease term. When evaluating which party (lessee or lessor) owns the improvements for accounting purposes, Columbia Property Trust considers a number of factors, including, among other things: whether the lease stipulates what the tenant allowance may be used for; whether the lessee or lessor retains legal title to the improvements; the expected economic life of the improvements relative to the lease term; and who directs the construction of the improvements. The determination of who owns the improvements for accounting purposes is subject to significant judgement and is not based on any one factor.

For information about Columbia Property Trust's other revenue streams, please see Note 11, Non-Lease Revenues.

Income Taxes

Columbia Property Trust has elected to be taxed as a REIT under the Code, as amended (the "Code") and has operated as such beginning with its taxable year ended December 31, 2003. To qualify as a REIT, Columbia Property Trust must meet certain organizational and operational requirements, including a requirement to distribute at least 90% of its REIT taxable income, as defined by the Code, to its stockholders. To the extent that Columbia Property Trust satisfies the distribution requirement but distributes less than 100% of its REIT taxable income, Columbia

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Property Trust would be subject to federal and state corporate income tax on the undistributed income. Generally, Columbia Property Trust does not incur federal income taxes, other than as described in the following paragraph, because its stockholder distributions typically exceed its taxable income due to noncash expenses such as depreciation. Columbia Property Trust is, however, subject to certain state and local taxes related to the operations of properties in certain locations, which have been provided for in the accompanying consolidated financial statements.

Columbia Property Trust TRS, LLC, Columbia KCP TRS, LLC, and Columbia Energy TRS, LLC (collectively, the "TRS Entities") are wholly owned subsidiaries of Columbia Property Trust and are organized as Delaware limited liability companies. The TRS Entities, among other things, provide tenant services that Columbia Property Trust, as a REIT, cannot otherwise provide. Columbia Property Trust has elected to treat the TRS Entities as taxable REIT subsidiaries. Columbia Property Trust may perform certain additional, noncustomary services for tenants of its buildings through the TRS Entities; however, any earnings related to such services are subject to federal and state income taxes. In addition, for Columbia Property Trust to continue to qualify as a REIT, Columbia Property Trust must limit its investments in taxable REIT subsidiaries to 20% of the value of the total assets. The TRS Entities' deferred tax assets and liabilities represent temporary differences between the financial reporting basis and the tax basis of assets and liabilities based on the enacted rates expected to be in effect when the temporary differences reverse. If applicable, Columbia Property Trust records interest and penalties related to uncertain tax positions as general and administrative expense in the accompanying consolidated statements of operations.

Segment Information

As of December 31, 2019, Columbia Property Trust's reportable segments are determined based on the geographic markets in which it has significant investments. Columbia Property Trust considers geographic location when evaluating its portfolio composition, and in assessing the ongoing operations and performance of its properties (see Note 15, Segment Information).

Reclassification

In accordance with Accounting Standard Codification 360, Property, Plant, and Equipment ("ASC 360"), and in response to the Securities and Exchange Commission's Disclosure Update and Simplification release effective November 5, 2018, gains on sales of real estate assets have been moved to other income (expense) on the consolidated statements of operations for all periods presented.

Recent Accounting Pronouncements

Effective January 1, 2019, Columbia Property Trust adopted Accounting Standard Codification 842, Leases ("ASC 842"), which amends the lease accounting rules with the following key changes:

•Lessees are required to record a right-of-use asset and a lease liability for all leases, as defined, with a term of greater than 12 months, and to classify such leases as either finance or operating leases based on the principle of whether or not the lease is effectively a financed purchase of the leased asset by the lessee, or not. This classification will determine whether the lease expense is recognized using the effective interest method (finance leases) or on a straight-line basis over the term of the lease (operating leases).

•Lessors are required to account for leases using an approach that is substantially similar to the pre-existing rules for operating leases, sales-type leases, and direct financing leases, with a few targeted changes, including that: (i) lessors are no longer permitted to capitalize and amortize initial indirect costs incurred to obtain a lease, and (ii) provisions for uncollectible tenant receivables are reflected as a reduction to lease revenues, instead of as general and administrative expense.

In connection with transitioning to ASC 842, Columbia Property Trust elected to use certain practical expedients which impact Columbia Property Trust as follows:

•Prospective implementation. In-place contracts retain their character as to whether they meet the definition of a lease or not; in-place leases retain their classification as an operating, sales-type, or direct financing lease; and prior-period accounting and presentation is unchanged.

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•Rental income and tenant reimbursements for operating leases are combined in a single line on the statements of operations for all periods presented.

•Leases with a term of 12 months or less are expensed as incurred, as provided for in a practical expedient elected by Columbia Property Trust.

See Note 10, Leases, for additional information.

Accounting Standard Update 2018-13, Fair Value Measurement: Disclosure Framework – Changes to the Disclosure Requirements for Fair Value Measurement ("ASU 2018-13"), which will be effective for Columbia Property Trust on January 1, 2020, expands the disclosure requirements related to a change in fair value technique hierarchy. ASU 2018-13 is not expected to have a material impact on Columbia Property Trust's consolidated financial statements or disclosures.

3.  Real Estate Transactions

Acquisitions

During 2019, 2018, and 2017, Columbia Property Trust acquired the following properties:

Property	Location	Date	Percent Acquired		Purchase Price (in thousands)(1)
2019
201 California Street	San Francisco, CA	December 9, 2019	100.0	%	$	238,900
101 Franklin Street(2)	New York, NY	December 2, 2019	92.5	%	$	205,500
2018
Lindbergh Center – Retail	Atlanta, GA	October 24, 2018	100.0	%	$	23,000
799 Broadway	New York, NY	October 3, 2018	49.7	%	$	30,200	(3)
2017
149 Madison Avenue	New York, NY	November 28, 2017	100.0	%	$	87,700
1800 M Street	Washington, D.C.	October 11, 2017	55.0	%	$	231,550	(3)
249 West 17th Street & 218 West 18th Street	New York, NY	October 11, 2017	100.0	%	$	514,100
114 Fifth Avenue	New York, NY	July 6, 2017	49.5	%	$	108,900	(3)

⁽¹⁾Exclusive of transaction costs and price adjustments. See purchase price allocation table below for a breakout of the net purchase price for wholly owned properties.

⁽²⁾Property is owned through a consolidated joint venture.

⁽³⁾These properties are owned through unconsolidated joint ventures. Purchase price is for Columbia Property Trust's partial interests in the properties.

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201 California Street

On December 9, 2019, Columbia Property Trust acquired 201 California Street, a 17-story, 252,000-square-foot office tower in San Francisco. As of the acquisition date, 201 California Street was 99% leased to 34 tenants, including First Republic Bank (13%), Dow Jones & Company, Inc. (12%), and Cooper, White & Cooper, LLP (12%). For the period from December 9, 2019 to December 31, 2019, Columbia Property Trust recognized revenues of $1.4 million and net income of $0.1 million from 201 California Street.

101 Franklin Street

On December 2, 2019, Columbia Property Trust acquired a 92.5% controlling financial interest in 101 Franklin Street (formerly 250 Church Street), a 16-story, 235,000-square-foot office building in Manhattan that will be fully redeveloped through a consolidated joint venture with an affiliate of Normandy (see Note 16, Subsequent Event). During 2019, Columbia Property Trust earned $37,000 from its investment in 101 Franklin Street.

Lindbergh Center – Retail

On October 24, 2018, Columbia Property Trust acquired the 147,000 square feet of ancillary retail and office space surrounding its existing property, Lindbergh Center, for a gross purchase price of $23.0 million. Lindbergh Center – Retail was sold in the Lindbergh Center disposition, as described below.

799 Broadway Joint Venture

On October 3, 2018, Columbia Property Trust formed a joint venture with an affiliate of Normandy (see Note 16, Subsequent Event) for the purpose of developing a 12-story, 182,000-square-foot office building at 799 Broadway in New York (the "799 Broadway Joint Venture"). Columbia Property Trust made an initial equity contribution of $30.2 million in the 799 Broadway Joint Venture for a 49.7% interest therein. At inception, the 799 Broadway Joint Venture acquired the property located at 799 Broadway for $145.5 million, exclusive of transaction costs and development costs, and borrowed $97.0 million under a construction loan with total capacity of $187.0 million.

149 Madison Avenue

149 Madison Avenue is a 12-story, 127,000-square-foot office building, which was vacant at the time of acquisition. Columbia Property Trust acquired 149 Madison Avenue subject to a ground lease which expired in January 2018. Columbia Property Trust is redeveloping this property. For the period from November 28, 2017 to December 31, 2017, Columbia Property Trust recognized $10,300 of revenues and net income of $9,200 from 149 Madison Avenue. All of the office space at 149 Madison Avenue is leased to WeWork.

1800 M Street Joint Venture

Columbia Property Trust entered a new joint venture partnership with Allianz Real Estate of America LLC ("Allianz"), which simultaneously acquired 1800 M Street, a 10-story, 581,000-square-foot office building in Washington, D.C. that is 94% leased, for a total of $421.0 million (the "1800 M Street Joint Venture"). Columbia Property Trust owns a 55% interest in the 1800 M Street Joint Venture, and Allianz owns the remaining 45%.

249 West 17th Street & 218 West 18th Street

249 West 17th Street is made up of two interconnected 12- and six-story towers, totaling 281,000 square feet of office and retail space, and 218 West 18th Street is a 12-story, 166,000-square-foot office building. As of the acquisition date, 249 West 17th Street was 100% leased to four tenants, including Twitter, Inc. (76%) and Room & Board, Inc. (21%); and, as of the acquisition date, 218 West 18th Street was 100% leased to seven tenants, including Red Bull North America, Inc. (25%), Company 3 (18%), SY Partners (16%), and SAE (16%). For the period from October 11, 2017 to December 31, 2017, Columbia Property Trust recognized revenues of $5.9 million and net income of $1.8 million from 249 West 17th Street, and revenues of $3.0 million and net income of $0.8 million from 218 West 18th Street.

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114 Fifth Avenue Joint Venture

Columbia Property Trust acquired a 49.5% equity interest in a joint venture that owns the 114 Fifth Avenue property from Allianz (the "114 Fifth Avenue Joint Venture"). 114 Fifth Avenue is a 19-story, 352,000-square-foot building located in Manhattan's Flatiron District that is 100% leased, and is unencumbered by debt. The 114 Fifth Avenue Joint Venture is owned by Columbia Property Trust (49.5%), Allianz (49.5%), and L&L Holding Company (1.0%).

Purchase Price Allocations for Consolidated Property Acquisitions

	201 California Street		101 Franklin Street(1)		149 Madison Avenue		249 West 17th Street		218 West 18th Street
Location	San Francisco, CA		New York, NY		New York, NY		New York, NY		New York, NY
Date Acquired	December 9, 2019		December 2, 2019		November 28, 2017		October 11, 2017		October 11, 2017
Purchase Price:
Land	$	77,833	$	57,145	$	59,112	$	113,149	$	43,836
Building and improvements	157,513		149,500		28,989		194,109		126,957
Intangible lease assets	13,241		—		—		27,408		12,120
Intangible lease origination costs	5,785		—		—		13,062		4,168
Intangible below market lease liability	(8,064)		—		—		(7,131)		(11,757)
Total purchase price	$	246,308	$	206,645	$	88,101	$	340,597	$	175,324

⁽¹⁾Owned through a consolidated joint venture, in which Columbia Property Trust owns a 92.5% interest.

Note 2, Summary of Significant Accounting Policies, provides a discussion of the estimated useful life for each asset class.

Pro Forma Financial Information

The following unaudited pro forma statements of operations presented for 2019, 2018, and 2017, have been prepared for Columbia Property Trust to give effect to the acquisitions of 201 California Street and 101 Franklin Street as if the acquisitions had occurred on January 1, 2018; and 249 West 17th Street, 218 West 18th Street, and 149 Madison Avenue as if the acquisitions had occurred on January 1, 2016. The following unaudited pro forma financial results for Columbia Property Trust have been prepared for informational purposes only and are not necessarily indicative of future results or of actual results that would have been achieved had these acquisitions been consummated as of January 1, 2018 and January 1, 2016 (in thousands):

	2019		2018		2017
Revenues	$	304,756	$	312,003	$	319,064
Net income attributable to common stockholders of Columbia Property Trust	$	17,600	$	16,822	$	183,318

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Dispositions

During 2019, 2018, and 2017, Columbia Property Trust sold the following properties and partial interest in properties of unconsolidated joint ventures. Additional information for certain of the dispositions is provided below the table.

Property	Location	Date	% Sold		Sale Price(1) (in thousands)			Gain on Sale (in thousands)
2019
Lindbergh Center	Atlanta, GA	September 26, 2019	100.0	%	$	187,000		$	—
One & Three Glenlake Parkway	Atlanta, GA	April 15, 2019	100.0	%	$	227,500		$	42,030
2018
222 East 41st Street	New York, NY	May 29, 2018	100.0	%	$	332,500		$	—
263 Shuman Boulevard	Chicago, IL	April 13, 2018	100.0	%	$	49,000		$	24,039
University Circle & 333 Market Street Joint Ventures	San Francisco, CA	February 1, 2018	22.5	%	$	235,300	(2)	$	762
2017
University Circle & 333 Market Street	San Francisco, CA	July 6, 2017	22.5	%	$	234,000	(2)	$	102,365
Key Center Tower & Marriott	Cleveland, OH	January 31, 2017	100.0	%	$	267,500		$	9,466
Houston Properties	Houston, TX	January 6, 2017	100.0	%	$	272,000		$	63,688

⁽¹⁾Exclusive of transaction costs and price adjustments.

⁽²⁾Sales price is for the partial interests in the properties or joint ventures that were sold.

Lindbergh Center

On September 26, 2019, Columbia Property Trust closed on the sale of Lindbergh Center, including Lindbergh Center – Retail, for a gross sales price of $187.0 million, exclusive of transaction costs. Columbia Property Trust recognized an impairment loss of $23.4 million related to this property in the third quarter of 2019, as further described in Note 2, Summary of Significant Accounting Policies. $46.0 million of the proceeds from this transaction were used to pay down the Revolving Credit Facility, as described in Note 5, Line of Credit and Notes Payable.

One & Three Glenlake Parkway

On April 15, 2019, Columbia Property Trust closed on the sale of One & Three Glenlake Parkway in Atlanta, for a gross sale price of $227.5 million, exclusive of $33.6 million of adjustments for tenant improvement allowances and rent abatements funded at closing. The proceeds from this transaction were used to pay down the Revolving Credit Facility, as described in Note 5, Line of Credit and Notes Payable.

222 East 41st Street

On May 29, 2018, Columbia Property Trust closed on the sale of 222 East 41st Street in New York, for $332.5 million, exclusive of transaction costs. Columbia Property Trust recognized an impairment loss of $30.8 million related to this property in the second quarter of 2018, as further described in Note 2, Summary of Significant Accounting Policies. The proceeds from this transaction were used to fully repay the $180.0 million remaining balance on a $300 million bridge loan, as described in Note 5, Line of Credit and Notes Payable.

263 Shuman Boulevard

On April 13, 2018, Columbia Property Trust transferred 263 Shuman Boulevard to the lender in extinguishment of the loan principal of $49.0 million, accrued interest expense, and accrued property operating costs, which resulted in a gain on extinguishment of debt of $24.0 million in the second quarter of 2018.

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University Circle & 333 Market Street

On July 6, 2017, Columbia Property Trust contributed 333 Market Street and the University Circle to joint ventures, and simultaneously sold a 22.5% interest in those joint ventures for $234.0 million to Allianz, an unrelated third party (collectively, the "San Francisco Joint Ventures").

On February 1, 2018, as agreed at the time of the initial San Francisco Joint Ventures formation, Allianz acquired another 22.5% interest in each of the San Francisco Joint Ventures at an aggregate price of $235.3 million, thereby reducing Columbia Property Trust's equity interest in each joint venture to 55.0%. These proceeds were used to reduce the balance on a $300 million bridge loan and the Revolving Credit Facility, as described in Note 5, Line of Credit and Notes Payable.

Key Center Tower & Marriott

Key Center Tower & Marriott were sold in one transaction for $254.5 million of gross proceeds at closing and a $13.0 million, 10-year accruing note receivable from the principal of the buyer. As a result, Columbia Property Trust has applied the installment method to account for this transaction, and deferred $13.0 million of the total $22.5 million gain on sale.

Houston Property Sale

5 Houston Center, Energy Center I, and 515 Post Oak were sold in one transaction for $272.0 million of gross proceeds, which resulted in a $63.7 million gain on sale.

4. Unconsolidated Joint Ventures

As of December 31, 2019 and December 31, 2018, Columbia OP owns interests in the following properties through joint ventures, which are accounted for using the equity method of accounting:

		Geographic Market	Ownership Interest		Carrying Value of Investment(1)
Joint Venture	Property Name				December 31, 2019			December 31, 2018
Market Square Joint Venture	Market Square	Washington, D.C.	51.0	%	$	135,557		$	134,250
University Circle Joint Venture	University Circle	San Francisco	55.0	%	283,633			292,951
333 Market Street Joint Venture	333 Market Street	San Francisco	55.0	%	269,638			273,783
114 Fifth Avenue Joint Venture	114 Fifth Avenue	New York	49.5	%	87,750			99,283
1800 M Street Joint Venture	1800 M Street	Washington, D.C.	55.0	%	233,196			237,333
799 Broadway Joint Venture(2)	799 Broadway	New York	49.7	%	44,686		(4)	33,753
					$	1,054,460		$	1,071,353

⁽¹⁾Includes basis differences. Columbia Property Trust's investments in unconsolidated joint ventures were greater than the historical costs recorded at the underlying joint venture level by $279.2 million and $282.0 million as of December 31, 2019 and December 31, 2018, respectively. Such basis differences result from the timing of each partner's joint venture interest acquisition; and formation costs incurred by Columbia Property Trust. Basis differences are amortized to income (loss) from unconsolidated joint ventures over the lives of the underlying assets or liabilities.

⁽²⁾Columbia Property Trust capitalized interest of $1.3 million and $0.2 million on its investment in the 799 Broadway Joint Venture in 2019 and 2018, respectively.

Columbia Property Trust has determined that none of its unconsolidated joint ventures are variable interest entities. However, Columbia Property Trust and its unconsolidated joint venture partners have substantive participation rights in the joint ventures, including management selection and termination, and the approval of operating and capital decisions. As such, Columbia Property Trust uses the equity method of accounting to record its investment in these joint ventures. Under the equity method, the investment in the joint ventures is recorded at cost and adjusted for cash contributions and distributions, and allocations of income or loss.

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Columbia Property Trust evaluates the recoverability of its investments in unconsolidated joint ventures in accordance with accounting standards for equity investments by first reviewing the investment for any indicators of impairment. If indicators are present, Columbia Property Trust estimates the fair value of the investment. If the carrying value of the investment is greater than the estimated fair value, management makes an assessment of whether the impairment is "other-than-temporary." In making this assessment, management considers the following: (1) the length of time and the extent to which fair value has been less than cost, and (2) Columbia Property Trust's intent and ability to retain its interest long enough for a recovery in market value. Based on the assessment as described above, Columbia Property Trust has determined that none of its investments in joint ventures are other-than-temporarily impaired as of December 31, 2019.

Condensed Combined Financial Information

Summarized balance sheet information for each of the unconsolidated joint ventures is as follows (in thousands):

	Total Assets				Total Debt					Total Equity(1)
	December 31, 2019		December 31, 2018		December 31, 2019			December 31, 2018		December 31, 2019		December 31, 2018
Market Square Joint Venture	$	582,747	$	582,176	$	324,815	(2)	$	324,762	$	241,719	$	241,581
University Circle Joint Venture	216,546		224,746		—			—		212,656		219,390
333 Market Street Joint Venture	367,652		375,884		—			—		352,385		360,915
114 Fifth Avenue Joint Venture	485,442		377,970		—			—		127,554		149,243
1800 M Street Joint Venture	437,439		447,585		—			—		421,588		429,016
799 Broadway Joint Venture	201,210		168,390		109,735		(3)	95,630		85,316		67,189
	$	2,291,036	$	2,176,751	$	434,550		$	420,392	$	1,441,218	$	1,467,334

⁽¹⁾Excludes basis differences (see footnote ⁽¹⁾ to the Carrying Value of Investment table above).

⁽²⁾The Market Square Joint Venture has a mortgage note with an outstanding balance of $325.0 million as of December 31, 2019 and December 31, 2018. The Market Square mortgage note bears interest at 5.07% and matures on July 1, 2023.

⁽³⁾Reflects $113.2 million outstanding, net of $3.5 million of net unamortized deferred financing costs, on the 799 Broadway construction loan. The 799 Broadway construction loan is being used to finance a portion of the 799 Broadway development project, has total capacity of $187.0 million, and bears interest at LIBOR, capped at 4.00%, plus a spread of 425 basis points (the "Construction Loan"). A portion of the monthly interest payments accrue into the balance of the loan. The Construction Loan matures on October 9, 2021, with two one-year extension options. For a discussion of Columbia Property Trust's equity guaranty related to the Construction Loan, see Note 7, Commitments and Contingencies.

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Summarized income statement information for the unconsolidated joint ventures for the years ended December 31, 2019, 2018, and 2017 is as follows (in thousands):

	Total Revenues						Net Income (Loss)						Columbia Property Trust's Share of Net Income (Loss)(1)
	2019		2018		2017		2019		2018		2017		2019		2018		2017
Market Square Joint Venture	$	47,737	$	44,815	$	41,749	$	(11,515)	$	(12,304)	$	(15,192)	$	(5,873)	$	(6,275)	$	(7,747)
University Circle Joint Venture	44,427		43,581		19,386		24,251		23,776		9,826		13,338		13,478		7,561
333 Market Street Joint Venture	28,170		27,006		12,971		14,929		14,620		6,948		8,211		8,312		5,331
114 Fifth Avenue Joint Venture	42,921		41,169		20,133		(10,674)		(10,256)		(4,885)		(5,283)		(5,077)		(2,820)
1800 M Street Joint Venture	38,377		37,486		8,005		4,887		4,239		619		2,688		2,332		326
799 Broadway Joint Venture	—		—		—		(882)		(132)		—		(439)		(66)		—
	$	201,632	$	194,057	$	102,244	$	20,996	$	19,943	$	(2,684)	$	12,642	$	12,704	$	2,651

⁽¹⁾Excludes amortization of basis differences, as described in footnote ⁽¹⁾ to the carrying value of investment table above, which are recorded as income (loss) from unconsolidated joint ventures in the accompanying consolidated statements of operations.

Asset and Property Management Fees

Columbia Property Trust provides property and asset management services to the Market Square Joint Venture, the University Circle Joint Venture, the 333 Market Street Joint Venture, and the 1800 M Street Joint Venture. Under these agreements, Columbia Property Trust oversees the day-to-day operations of these joint ventures and their properties, including property management, property accounting, and other administrative services. During the years ended December 31, 2019, 2018, and 2017, Columbia Property Trust earned the following fees from these unconsolidated joint ventures (in thousands):

	2019		2018		2017
Market Square Joint Venture	$	2,256	$	2,156	$	1,998
University Circle Joint Venture	2,313		2,283		1,000
333 Market Street Joint Venture	819		784		367
1800 M Street Joint Venture	2,156		2,161		417
	$	7,544	$	7,384	$	3,782

Columbia Property Trust also received reimbursements of property operating costs of $4.3 million, $4.2 million, and $2.0 million for the years ended December 31, 2019, 2018, and 2017, respectively, which are included in other property income revenues in the accompanying consolidated statements of operations. Property management fees of $0.6 million and $0.7 million, respectively, were due to Columbia Property Trust from the joint ventures and are included in prepaid expenses and other assets on the accompanying consolidated balance sheets as of December 31, 2019 and December 31, 2018, respectively.

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5. Line of Credit and Notes Payable

Columbia OP is the borrower on all of Columbia Property Trust's outstanding debt. As of December 31, 2019 and 2018, Columbia Property Trust had the following line of credit and notes payable indebtedness outstanding (excluding bonds payable; see Note 6, Bonds Payable) in thousands:

	Rate as of December 31, 2019		Term Debt or Interest Only		Outstanding Balance as of December 31,
Facility				Maturity	2019		2018
Revolving Credit Facility	LIBOR + 90 bp	(1)	Interest only	January 31, 2023	$	334,000	$	482,000
$300 Million Term Loan	LIBOR + 100 bp	(2)	Interest only	January 31, 2024	300,000		—
$150 Million Term Loan	LIBOR + 110 bp	(3)	Interest only	July 29, 2022	150,000		150,000
Less: Deferred financing costs related to term loans					(2,084)		(2,692)
Total indebtedness					$	781,916	$	629,308

⁽¹⁾As of December 31, 2019, borrowings under the Revolving Credit Facility, as described below, bear interest at the option of Columbia Property Trust at an alternate base rate, plus an applicable margin ranging from 0.00% to 0.45% for base-rate borrowings, or at LIBOR, as defined in the credit agreement, plus an applicable margin ranging from 0.775% to 1.45% for LIBOR-based borrowings, based on Columbia Property Trust's applicable credit rating.

⁽²⁾Columbia Property Trust is party to an interest rate swap agreement with a notional amount of $300.0 million, which effectively fixes its interest rate on the $300 Million Term Loan, as further described below, at 2.55% and terminates on August 13, 2024. This interest rate swap agreement qualifies for hedge accounting treatment; therefore, changes in the fair value are recorded as a market value adjustment to interest rate swap in the accompanying consolidated statement of other comprehensive income.

⁽³⁾Columbia Property Trust is party to an interest rate swap agreement with a notional amount of $150.0 million, which effectively fixes its interest rate on the $150 Million Term Loan, as further described below, at 3.07% and terminates on July 29, 2022. This interest rate swap agreement qualifies for hedge accounting treatment; therefore, changes in fair value are recorded as a market value adjustment to interest rate swap in the accompanying consolidated statement of other comprehensive income.

Term Loan and Line of Credit Amendment and Restatement

On December 7, 2018, Columbia Property Trust amended and restated its $500.0 million revolving credit facility and $300.0 million unsecured term loan (together, the "Credit Agreement"). The Credit Agreement provides for (i) a $650.0 million unsecured revolving credit facility (the "Revolving Credit Facility"), with an initial term ending January 31, 2023 and two six-month extension options (for a total possible extension option of one year to January 31, 2024), subject to the paying of certain fees and the satisfaction of certain other conditions, and (ii) a 12-month, delayed-draw, $300.0 million unsecured term loan, with a term ending January 31, 2024 (the "$300 Million Term Loan"). The $300 Million Term Loan was fully drawn during 2019.

At Columbia Property Trust's option, borrowings under the Credit Agreement bear interest at either (i) the alternate base rate plus an applicable margin based on five stated pricing levels ranging from 0.00% to 0.45% for the Revolving Credit Facility and 0.00% to 0.65% for the $300 Million Term Loan, or (ii) the LIBOR rate, as defined in the credit agreement, plus an applicable margin based on five stated pricing levels ranging from 0.775% to 1.45% for the Revolving Credit Facility and 0.85% to 1.65% for the $300 Million Term Loan, in each case based on Columbia Property Trust's credit rating. As described above, the interest rate on the $300 Million Term Loan has been effectively fixed at 2.55% with an interest rate swap agreement.

Debt Covenants

As of December 31, 2019, the $300 Million Term Loan, the $150 Million Term Loan, and the Revolving Credit Facility (collectively, the "Debt Facilities") contain representations and warranties, financial and other affirmative and

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negative covenants, events of defaults, and remedies typical for these types of facilities. The financial covenants as defined in the Debt Facilities:

•limit the ratio of secured debt to total asset value to 40% or less;

•require the fixed charge coverage ratio to be at least 1.50:1.00;

•limit the ratio of debt to total asset value to 60% or less, or 65% or less following a material transaction;

•require the unencumbered interest coverage ratio to be at least 1.75:1.00; and

•limit the unencumbered leverage ratio to 60% or less, or 65% or less following a material transaction.

As of December 31, 2019, Columbia Property Trust was in compliance with the restrictive financial covenants on its Debt Facilities and notes payable obligations.

Fair Value of Debt

The estimated fair value of Columbia Property Trust's consolidated line of credit and notes payable as of December 31, 2019 and 2018, was approximately $784.1 million and $632.1 million, respectively. The related carrying value of the line of credit and notes payable as of December 31, 2019 and 2018, was $784.0 million and $632.0 million, respectively. Columbia Property Trust estimated the fair value of its Revolving Credit Facility and term loans by obtaining estimates for similar facilities from multiple market participants as of the respective reporting dates. Therefore, the fair values determined are considered to be based on observable market data for similar instruments (Level 2).

Interest Paid and Capitalized

As of December 31, 2019 and 2018, Columbia Property Trust's weighted-average interest rate on its consolidated line of credit and notes payable was approximately 2.63% and 3.26%, respectively. Columbia Property Trust made interest payments of approximately $17.9 million, $22.1 million, and $21.5 million during 2019, 2018, and 2017, respectively.

Columbia Property Trust capitalizes interest on development, redevelopment, and improvement projects owned directly and through joint ventures, using the weighted-average interest rate of its consolidated borrowings for the period. During 2019, 2018, and 2017, Columbia Property Trust capitalized interest of $5.1 million, $4.0 million, and $0.3 million, respectively. For 2019, the weighted average interest rate on Columbia Property Trust's outstanding borrowings was 3.55%.

Debt Repayments and Extinguishment

There were no debt repayments in 2019. During 2018 Columbia Property Trust made the following debt repayments:

•On December 7, 2018, concurrent with closing on the Credit Agreement, Columbia Property Trust repaid the $300.0 million remaining balance on the $300 Million Term Loan, which, as described above, includes a delayed-draw feature, allowing up to 12 months to fully draw the term loan.

•On October 10, 2018, Columbia Property Trust repaid the $20.7 million outstanding balance on the One Glenlake mortgage note two months prior to its original maturity date.

•On April 13, 2018, Columbia Property Trust transferred 263 Shuman Boulevard to the lender in extinguishment of the $49.0 million loan principal, accrued interest expense, and accrued property operating expenses, which resulted in a gain on extinguishment of debt of $24.0 million in the second quarter of 2018.

•On February 2, 2018, Columbia Property Trust repaid $120.0 million of the outstanding balance on a $300.0 million bridge loan, using a portion of the proceeds from the sale of an interest in the San Francisco Joint Ventures, as described in Note 3, Real Estate Transactions. On May 30, 2018, Columbia Property Trust repaid the remaining $180.0 million outstanding balance on the bridge loan, using a portion of the proceeds from the sale of 222 East 41st Street, as described in Note 3, Real Estate Transactions. As a result, Columbia Property Trust has recognized a loss on extinguishment of debt of $0.3 million related to unamortized deferred financing costs.

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The following table summarizes the aggregate maturities of Columbia Property Trust's line of credit and notes payable as of December 31, 2019 (in thousands):

2020	$	—
2021	—
2022	150,000
2023	334,000
2024	300,000
Thereafter	—
Total	$	784,000

6. Bonds Payable

Columbia OP has two series of bonds outstanding as of December 31, 2019 and 2018: $350 million of 10-year, unsecured 3.650% senior notes issued at 99.626% of their face value (the "2026 Bonds Payable"); and $350.0 million of 10-year, unsecured 4.150% senior notes issued at 99.859% of their face value (the "2025 Bonds Payable"). Both series of bonds are guaranteed by Columbia Property Trust and require semi-annual interest payments. Upon issuance, a portion of the 2026 Bonds Payable was used to redeem $250.0 million of bonds payable, due in April 2018. During the years ended December 31, 2019 and 2018, Columbia Property Trust made interest payments of $27.3 million on its bonds payable. The principal amount of the 2026 Bonds Payable is due and payable on August 15, 2026, and the principal amount of the 2025 Bonds Payable is due and payable on April 1, 2025.

The 2026 Bonds Payable and the 2025 Bonds Payable contain certain restrictive covenants. These covenants, as defined, pursuant to an indenture:

•limit the ratio of debt to total assets to 60%;

•limit Columbia Property Trust's ability to incur debt if the consolidated income available for debt service to annual debt service charge for four previous consecutive fiscal quarters is less than 1.50:1.00 on a pro forma basis;

•limit Columbia Property Trust's ability to incur liens if, on an aggregate basis for Columbia Property Trust, the secured debt amount would exceed 40% of the value of the total assets; and

•require that the ratio of unencumbered asset value, as defined, to total unsecured debt be at least 150% at all times.

As of December 31, 2019, Columbia Property Trust was in compliance with the restrictive financial covenants on its 2026 Bonds Payable and 2025 Bonds Payable.

The estimated fair value of the 2025 Bonds Payable and the 2026 Bonds Payable as of December 31, 2019 and 2018, was approximately $734.4 million and $685.0 million, respectively. The related carrying value of the bonds payable, net of discounts, as of December 31, 2019 and 2018, was $698.9 million and $698.7 million, respectively. Columbia Property Trust estimated the fair value of the bonds payable based on a discounted cash flow analysis, using observable market data for its bonds payable and similar instruments (Level 2). The discounted cash flow method of assessing fair value results in a general approximation of value, which may differ from the price that could be achieved in a market transaction.

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7.  Commitments and Contingencies

Commitments Under Existing Lease Agreements

Certain lease agreements include provisions that, at the option of the tenant, may obligate Columbia Property Trust to expend capital to expand an existing property or provide other expenditures for the benefit of the tenant. As of December 31, 2019, Columbia Property Trust had the following material tenant obligations which have arisen in the normal course of business: $17.5 million related to the WeWork lease at 149 Madison and $17.9 million related to the Pershing lease at 95 Columbus. Such amounts are payable as incurred, and therefore no accrual is booked as of December 31, 2019. Additionally, in January 2020, Columbia Property Trust preleased space to be added to 80 M Street in a vertical expansion project. Columbia is required to fund approximately $70.0 million related to construction and tenant improvement allowances for the new space.

Commitments Under Unconsolidated Joint Venture Agreements

Columbia Property Trust's joint venture agreements, including those that are developing or redeveloping properties, provide for capital contributions to be made to the joint ventures by the joint venture partners. As of December 31, 2019, Columbia Property Trust holds seven properties through consolidated and unconsolidated joint ventures, including three that are under development or redevelopment. Capital contributions are payable when a capital call is made by the joint venture, and there are no unfunded capital calls as of December 31, 2019.

Columbia Property Trust guarantees a portion of the debt held by the 799 Broadway Joint Venture. As of December 31, 2019, the 799 Broadway Joint Venture has $113.2 million in outstanding borrowings on the Construction Loan, as further described in Note 4, Unconsolidated Joint Ventures. Pursuant to a joint and several guaranty agreement with the Construction Loan lender, Columbia Property Trust and Normandy are required to make aggregate additional equity contributions to the joint venture based on the initial expected project costs, less the amount of equity contributions made to date. As of December 31, 2019, the remaining equity contribution requirement is $31.9 million, of which $15.8 million reflects Columbia Property Trust's allocated share. Equity contributions become payable by Columbia Property Trust to the joint venture when a capital call is received. As of December 31, 2018, no capital calls remain unpaid; therefore, no liability has been recorded related to this guaranty.

Litigation

Columbia Property Trust is subject to various legal proceedings, claims, and administrative proceedings arising in the ordinary course of business, some of which are expected to be covered by liability insurance. Management makes assumptions and estimates concerning the likelihood and amount of any reasonably possible loss relating to these matters using the latest information available. Columbia Property Trust records a liability for litigation if an unfavorable outcome is probable and the amount of loss or range of loss can be reasonably estimated. If an unfavorable outcome is probable and a reasonable estimate of the loss is a range, Columbia Property Trust accrues the best estimate within the range. If no amount within the range is a better estimate than any other amount, Columbia Property Trust accrues the minimum amount within the range. If an unfavorable outcome is probable but the amount of the loss cannot be reasonably estimated, Columbia Property Trust discloses the nature of the litigation and indicates that an estimate of the loss or range of loss cannot be made. If an unfavorable outcome is reasonably possible and the estimated loss is material, Columbia Property Trust discloses the nature and estimate of the possible loss of the litigation. Columbia Property Trust does not disclose information with respect to litigation where the possibility of an unfavorable outcome is considered to be remote. Based on current expectations, such matters, both individually and in the aggregate, are not expected to have a material adverse effect on the liquidity, results of operations, business, or financial condition of Columbia Property Trust. Columbia Property Trust is not currently involved in any legal proceedings of which management would consider the outcome to be reasonably likely to have a material adverse effect on the results of operations or financial condition of Columbia Property Trust.

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8. Stockholders' Equity and Partner's Capital

Common Stock Repurchase Program

Columbia Property Trust's board of directors authorized the repurchase of up to an aggregate of $200.0 million of its common stock, par value $0.01 per share, from September 4, 2019 through September 4, 2021 (the "2019 Stock Repurchase Program"). Under the 2019 Stock Repurchase Program, Columbia Property Trust acquired 1.6 million shares at an average price of $20.72 per share, for aggregate purchases of $33.5 million during 2019. As of December 31, 2019, $166.5 million remains available for repurchases under the 2019 Stock Repurchase Program. Common stock repurchases are charged against equity as incurred, and the repurchased shares are retired. Columbia Property Trust will continue to evaluate the purchase of shares, primarily through open market transactions, which are subject to market conditions and other factors.

Long-Term Incentive Plan

Employee Awards

Columbia Property Trust maintains a stockholder-approved, long-term incentive plan that provides for grants of stock to be made to certain employees and independent directors of Columbia Property Trust (as amended and restated, the "LTI Plan"). In May 2017, Columbia Property Trust's stockholders approved the LTI Plan, and 4.8 million shares are authorized and reserved for issuance under the LTI Plan.

Columbia Property Trust's LTI Plan includes both time-based awards and performance-based awards for all participants. Time-based awards vest ratably on each anniversary of the grant date over the next four years. Performance-based restricted stock units (the "Performance-Based RSUs") will vest 75% at the conclusion of a three-year performance period, and the remaining 25% will vest one year later. For 2019, 2018, and 2017 time-based awards, Columbia Property Trust issued 176,122, 128,486, and 139,825 shares of common stock to employees, respectively; and for 2019, 2018, and 2017 performance-based awards Columbia Property Trust granted 256,384, 176,702, and 193,219 restricted stock units, respectively. In addition, in 2017, as a result of transitioning from a one- to three-year performance period, Columbia Property Trust granted 45,076 and 92,585 one-time transitional Performance-Based RSUs, which vested at the conclusion of the one-year and two-year performance periods, respectively. Upon reaching a predefined performance threshold, the payout of the Performance-Based RSUs will range from 50% to 150% of the Performance-Based RSUs granted, depending on Columbia Property Trust's total stockholder return relative to the FTSE NAREIT Equity Office Index. All awards are expensed over the vesting period based on their estimated fair values. The fair value of time-based awards is estimated using the closing stock price on the grant date, and fair values of performance-based awards are estimated using a Monte Carlo valuation.

The 2020 LTI Plan awards are consistent with the LTI Plan awards granted in the three prior years. On January 1, 2020, Columbia Property Trust granted 165,233 shares of time-based stock awards to employees, which will vest ratably on each anniversary of the grant over the next four years. On January 1, 2020, Columbia Property Trust also granted 246,387 Performance-Based RSUs, of which 75% will vest at the conclusion of a three-year performance period, and the remaining 25% will vest one year later. Consistent with the prior-year awards, the payout of the 2020 Performance-Based RSUs will be determined based on Columbia Property Trust's total stockholder return relative to the FTSE NAREIT Equity Office Index.

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Below is a summary of the employee awards issued under the LTI Plan for 2019, 2018, and 2017:

	Restricted Shares				RSUs
	Shares (in thousands)		Estimated Fair Value(1)		Units (in thousands)		Estimated Fair Value(2)
Unvested as of January 1, 2017	256		$	22.62	—		$	—
Granted	333		$	21.59	331		$	18.78
Vested	(193)		$	22.42	—		$	—
Forfeited	(7)		$	21.81	(2)		$	19.01
Unvested as of December 31, 2017	389		$	21.85	329		$	—
Granted	139		$	22.97	206		$	20.55
Vested	(153)		$	22.13	(70)		$	19.47
Forfeited	—		$	—	(11)		$	18.60
Unvested as of December 31, 2018	375		$	22.15	454		$	19.37
Granted	176		$	19.36	257		$	17.66
Vested	(165)		$	21.99	(121)		$	19.08
Forfeited	(12)		$	20.66	(6)		$	18.67
Unvested as of December 31, 2019	374	(3)	$	20.96	584	(3)	$	18.86

⁽¹⁾Reflects the weighted-average grant-date fair value using the market closing price on the date of the grant.

⁽²⁾Reflects the weighted-average grant-date fair value using a Monte Carlo valuation.

⁽³⁾As of December 31, 2019, Columbia Property Trust expects approximately 360,000 of the 374,000 unvested restricted shares to ultimately vest and approximately 562,000 of the 584,000 unvested RSUs to ultimately vest, assuming a forfeiture rate of 4%, which was determined based on peer company data, adjusted for the specifics of the LTI Plan.

Director Stock Grants

Columbia Property Trust grants equity retainers to its directors under the LTI Plan. Such grants vest immediately. Beginning in May 2017, these grants are made annually for the following year and vest immediately. Prior to this time, the independent directors' equity retainers were paid quarterly. During 2019, 2018, and 2017, Columbia Property Trust granted the following equity retainers:

Date of Grant	Shares	Grant-Date Fair Value(1)
2019 Director Grants:
May 14, 2019	28,000	$	22.13
2018 Director Grants:
May 14, 2018	31,743	$	22.20
2017 Director Grants:
January 3, 2017	8,279	$	21.58
May 2, 2017	33,581	$	22.57
November 27, 2017(2)	1,596	$	23.07

⁽¹⁾Columbia Property Trust determined the grant-date fair value using the market closing price on the date of the grant.

⁽²⁾In November 2017, a new director was appointed to the board of directors of Columbia Property Trust. The new director received a pro-rated annual equity retainer grant at appointment.

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Stock-Based Compensation Expense

Columbia Property Trust incurred stock-based compensation expense related to the following events (in thousands):

	2019		2018		2017
Amortization of unvested LTI Plan awards	$	3,282	$	3,800	$	4,098
Future employee awards(1)	2,720		2,461		2,509
Issuance of shares to independent directors	620		705		973
Total stock-based compensation expense	$	6,622	$	6,966	$	7,580

⁽¹⁾Reflects amortization of LTI Plan awards for service during the current period, for which shares will be issued in future periods.

These expenses are included in general and administrative expenses – corporate in the accompanying consolidated statements of operations. There were $9.5 million and $8.6 million of unrecognized compensation costs related to unvested awards under the LTI Plan as of December 31, 2019 and December 31, 2018, respectively. This amount will be amortized over the respective vesting period, ranging from one year to four years at the time of grant.

Independent Director Stock Option Plan

Columbia Property Trust previously maintained an independent director stock option plan that provided for grants of stock to be made to independent directors of Columbia Property Trust (the "Director Plan"). A total of 25,000 shares were authorized and reserved for issuance under the Director Plan, which was suspended in April of 2008. Under the Director Plan, options were granted upon appointment to the board and on each annual meeting date. As of January 1, 2017, Columbia Property Trust had 1,375 options outstanding under this plan, all of which expired in 2017. There are no remaining options outstanding under the Director Plan.

Columbia OP Partner's Capital

Columbia Property Trust is the general partner and was the sole owner of Columbia OP for all periods presented.

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9.  Supplemental Disclosures of Noncash Investing and Financing Activities

Outlined below are significant noncash investing and financing activities for Columbia Property Trust, Inc. for the years ended December 31, 2019, 2018, and 2017 (in thousands): 

	Years Ended December 31,
	2019		2018		2017
Investment in real estate funded with other assets	$	—	$	617	$	311
Deposits applied to sales of real estate	$	—	$	—	$	10,000
Other assets assumed upon acquisition	$	6	$	259	$	1,014
Other liabilities assumed upon acquisition	$	137	$	664	$	268
Real estate assets transferred to unconsolidated joint venture	$	—	$	—	$	558,122
Other assets transferred to unconsolidated joint venture	$	—	$	—	$	43,700
Other liabilities transferred to unconsolidated joint venture	$	—	$	—	$	21,347
Extinguishment of 263 Shuman Boulevard mortgage note by transferring property to lender	$	—	$	49,000	$	—
Settlement of capital lease obligation with related development authority bonds	$	—	$	120,000	$	—
Amortization of net discounts on debt	$	180	$	180	$	180
Accrued investments in unconsolidated joint ventures	$	198	$	386	$	—
Accrued capital expenditures and deferred lease costs	$	12,944	$	15,145	$	25,069
Operating lease liability recorded at adoption of ASC 842	$	34,791	$	—	$	—
Accrued dividends payable	$	24,209	$	23,340	$	23,961
Cumulative-effect adjustment to equity for the adoption of ASU 2017-05 and 2014-09	$	—	$	358,098	$	—
Market value adjustment to interest rate swaps that qualify for hedge accounting treatment	$	(3,445)	$	1,441	$	1,786
Common stock issued to employees and directors, and amortized (net of income tax witholdings)	$	6,622	$	6,966	$	7,580

During 2019, 2018, and 2017, Columbia OP recorded non-cash contributions (distributions) from (to) Columbia Property Trust of $(7.0) million, $165.9 million, and $(65.2) million, respectively, to settle due from (to) affiliate account balances.

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10. Leases

Columbia Property Trust as Lessee

Columbia Property Trust is a lessee with respect to ground leases at certain of its investment properties, office space leases, and various information technology equipment leases. Operating lease assets represent Columbia Property Trust's right to use the underlying asset over the lease term, and operating lease liabilities represent Columbia Property Trust's obligation to make lease payments over the lease term. Operating lease liabilities are measured as the present value of lease payments over the lease term. As most of Columbia Property Trust's leases do not provide an implicit rate, Columbia Property Trust uses its incremental borrowing rate, based on information available at commencement, to calculate the present value of lease payments. Lease term extensions are included in the operating lease liability when it is reasonably certain that they will be exercised. Any variable payments for non-lease services provided under leases are expensed as incurred. Operating lease assets are measured based on the corresponding operating lease liability amount, reduced for lease incentives. At adoption of ASC 842, straight-line rent payable (receivable) balances and intangible lease asset (liability) balances were reclassified to the corresponding right of use assets. Operating lease expense is recognized on a straight-line basis over the lease term, and is recorded as property operating costs for ground leases and as general and administrative – corporate for all other operating leases. Contracts are evaluated at commencement to determine if the contract contains a lease, and the appropriate classification for such leases.

As of December 31, 2019, Columbia Property Trust has one ground lease with a remaining lease term of 58.0 years, inclusive of renewal options, which is included in operating lease assets of $29.5 million. Payments for all future periods under this ground lease have already been made. Thus, as of December 31, 2019, operating lease liabilities of $2.2 million include only the present value of future payments due under an office lease, which has a remaining lease term of 3.0 years.

As of December 31, 2019, the future minimum lease payments to be made by Columbia Property Trust under its operating lease are as follows (in thousands):

2020	$	728
2021	760
2022	793
2023	67
2024	—
Thereafter	—
Total lease payments	2,348
Less: interest expense	(162)
Present value of lease liabilities	$	2,186
Weighted-average remaining lease term (years)	3.1 years
Weighted-average discount rate	4.5		%

Columbia Property Trust's operating leases had the following impacts on the consolidated balance sheet as of December 31, 2019 (in thousands):

	Ground Leases		Office Lease		Total Operating Leases
Assets:
Total operating lease assets	$	27,843	$	1,627	$	29,470
Liabilities:
Total operating lease liabilities	$	—	$	2,186	$	2,186

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Columbia Property Trust's operating leases had the following impacts on the consolidated statements of operations for 2019 (in thousands):

	Ground Leases		Office Lease		Total Operating Leases
Property operating costs	$	2,165	$	—	$	2,165
General and administrative – corporate	—		580		580
Total operating lease expenses	$	2,165	$	580	$	2,745

Columbia Property Trust's operating leases had the following impacts on the consolidated statements of cash flows for the 2019 (in thousands):

	Ground Leases		Office Lease		Total Operating Leases
Cash paid for operating lease liabilities included in cash flows from operations	$	(1,329)	$	(697)	$	(2,026)

Columbia Property Trust as Lessor

Columbia Property Trust owns and leases commercial real estate, primarily office space, to tenants under operating leases for specified periods of time. Some of Columbia Property Trust's leases contain extension and/or termination options; however, the exercise of these extensions or terminations is at the discretion of the tenant and subject to negotiations. Therefore, such options are only recognized once they are deemed reasonably certain, typically at the time the option is exercised. Rental income related to such leases is recognized on a straight-line basis over the remaining lease period, and is included in lease revenues on the consolidated statements of operations. If at any point during the term of a lease, it is determined that the collectability of a tenant receivable is not probable, such receivable is written off against lease revenues. Contracts are evaluated at commencement to determine if the contract contains a lease, as defined by ASC 842, and the appropriate classification for such leases. In making this determination, Columbia Property Trust evaluates, among other things, whether the customer has the right to control the use of the identified asset. As of December 31, 2019, the weighted-average remaining term for such leases is approximately 7.4 years.

Lease revenues include fixed and variable payments. Fixed payments primarily relate to base rent and include payments related to lease termination fees; and variable payments primarily relate to tenant reimbursements for certain property operating costs. Lease termination fees are recognized on a straight-line basis from the point at which Columbia Property Trust receives notification of termination until the date the tenant loses the right to lease the space and Columbia Property Trust has satisfied all obligations under the lease or termination agreement. During 2019, 2018, and 2017, Columbia Property Trust earned lease termination fees of $0.4 million, $2.2 million, and $0.4 million, respectively. Fixed and variable payments for 2019 are as follows (in thousands):

Fixed payments	$	250,077
Variable payments	26,072
Total lease revenues	$	276,149

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As of December 31, 2019, the future minimum fixed lease payments due to Columbia Property Trust under non-cancelable operating leases are as follows (thousands):

2020	$	223,249
2021	224,999
2022	216,210
2023	205,955
2024	197,846
Thereafter	1,028,119
Total	$	2,096,378

11. Non-Lease Revenues

Columbia Property Trust applies Accounting Standard Codification 606, Revenues from Contracts with Customers ("ASC 606"), to its non-lease revenue streams outlined below. ASC 606 requires companies to perform a five-step analysis of transactions to determine when and how revenue is recognized. See Note 10, Leases, for information about revenues earned under leases.

Asset and Property Management Fee Income

Under asset and property management agreements in place with certain of its unconsolidated joint ventures, Columbia Property Trust earns revenue for performing asset and property management functions for properties owned through its joint ventures, as further described in Note 4, Unconsolidated Joint Ventures. During 2019, 2018, and 2017, Columbia Property Trust earned revenues of $7.5 million, $7.4 million, and $3.8 million, respectively, under these agreements. Asset and property management services are ongoing and routine, and are provided on a recurring basis. Therefore such fees are recognized ratably over the service period, usually a period of three months. Columbia Property Trust receives payments quarterly for asset management fees and monthly for property management fees.

Leasing Override Fees

Under the asset management agreements for certain properties owned through unconsolidated joint ventures, Columbia Property Trust is eligible to earn leasing override fees equal to a percentage of the total rental payments to be made by the tenant over the term of the lease. Such fees are required to be recognized when Columbia Property Trust's obligation to perform is complete, typically upon execution of the lease. Prior to January 1, 2018, such fees were not recognized until billable to the applicable joint venture, typically upon commencement of the lease. Upon implementing ASC 606, effective January 1, 2018, Columbia Property Trust accelerated the recognition of lease override fees related to a lease that had been executed but not yet commenced, by recording $0.3 million of lease override fees receivable as prepaid expenses and other assets and a cumulative-effect adjustment to increase equity by the same amount. During 2019 and 2018, Columbia Property Trust earned leasing override fees of $0.1 million and $0.2 million, respectively, which are included in asset and property management fee income on the accompanying consolidated statements of operations. During 2017, Columbia Property Trust did not earn any leasing override fees.

Salary and Other Reimbursement Revenue

Under the property management agreements for certain properties owned through unconsolidated joint ventures, Columbia Property Trust receives reimbursements for salaries and property operating costs for ongoing and routine services that are provided by Columbia Property Trust employees on a recurring basis. Such revenues are recognized ratably over the service period, usually a period of one month, three months, or one year. During 2019, 2018, and 2017, Columbia Property Trust earned salary and other reimbursement revenue of $4.5 million, $4.4 million, and $2.3 million, respectively. These amounts are included in other property income on the accompanying consolidated statements of income.

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Miscellaneous Revenue

Columbia Property Trust also receives revenues for services provided to its tenants through the TRS Entities, including fitness centers, shuttles, and cafeterias, which are included in other property income on the accompanying consolidated statements of income. Such services are ongoing and routine, and are provided on a recurring basis. These revenues are recognized ratably over the service period, usually a period of one month or one quarter. During 2019, 2018, and 2017, Columbia Property Trust earned miscellaneous revenue of $0.3 million, $0.7 million, and $0.6 million, respectively. These amounts are included in other property income on the accompanying consolidated statements of income.

12. Income Taxes

Columbia Property Trust's income tax basis net income during 2019, 2018, and 2017 (in thousands) follows:

	2019		2018		2017
GAAP basis financial statement net income attributable to common stockholders	$	9,197	$	9,491	$	176,041
Increase (Decrease) in Net Income Resulting From:
Depreciation and amortization expense for financial reporting purposes in excess of amounts for income tax purposes	41,648		43,753		33,918
Rental income accrued for financial reporting purposes in excess of (less than) amounts for income tax purposes	(10,373)		7,145		(38,426)
Net amortization of above-/below-market lease intangibles for financial reporting purposes less than amounts for income tax purposes	(5,107)		(5,990)		(6,091)
Interest expense for financial reporting purposes in excess of amounts for income tax purposes	5,852		—		—
Bad debt expense for financial reporting purposes less than (in excess of) amounts for income tax purposes	1		4		(31)
Income from unconsolidated joint ventures for financial reporting purposes in excess of amount for income tax purposes	15,224		16,654		13,902
Gains or losses on disposition of real property for financial reporting purposes that are more favorable than amounts for income tax purposes	(57,284)		79,376		(126,770)
Other expenses or revenues for financial reporting purposes in excess (less than) of amounts for income tax purposes	37,912		(32,342)		11,331
Income tax basis net income, prior to dividends-paid deduction	$	37,070	$	118,091	$	63,874

As of December 31, 2019, the tax basis carrying value of Columbia Property Trust's total assets was approximately $4.4 billion. For income tax purposes, distributions to common stockholders are characterized as ordinary income, capital gains, or as a return of a stockholder's invested capital. Columbia Property Trust's distributions per common share are summarized as follows:

	2019		2018		2017
Ordinary income	53.1	%	100.0	%	58.5	%
Capital gains	—	%	—	%	—	%
Return of capital	46.9	%	—	%	41.5	%
Total	100.0	%	100.0	%	100.0	%

As of December 31, 2019, returns for the calendar years 2015 through 2019 remain subject to examination by U.S. or various state tax jurisdictions.

No provisions for federal income taxes have been made in the accompanying consolidated financial statements, other than the provisions relating to the TRS Entities, as Columbia Property Trust made distributions in excess of taxable income for the periods presented. Columbia Property Trust is subject to certain state and local taxes related

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to property operations in certain locations, which have been provided for in the accompanying consolidated financial statements. The income taxes recorded by the TRS Entities for the years ended December 31, 2019, 2018, and 2017, are as follows:

	Years Ended December 31,
	2019		2018		2017
Federal income tax	$	14	$	63	$	188
State income tax	6		(26)		38
Total income tax	$	20	$	37	$	226

As of December 31, 2019 and 2018, Columbia Property Trust had deferred tax assets of $0.2 million, which are included in prepaid expenses and other assets in the accompanying consolidated balance sheets.

13. Earnings Per Share

The basic and diluted earnings-per-share computations and net income have been reduced for the dividends paid on unvested shares related to the LTI Plan grants, as described in Note 8, Stockholders' Equity and Partner's Capital. The following table reconciles the numerator for the basic and diluted earnings-per-share computations shown on the consolidated statements of income (in thousands):

	2019		2018		2017
Net income attributable to common stockholders	$	9,197	$	9,491	$	176,041
Distributions paid on unvested shares	(310)		(296)		(337)
Net income attributable to common stockholders used to calculate basic and diluted earnings per share	$	8,887	$	9,195	$	175,704

The following table reconciles the denominator for the basic and diluted earnings-per-share computations shown on the consolidated statements of income (in thousands):

	2019	2018	2017
Weighted-average common shares – basic	116,261	117,888	120,795
Plus Incremental Weighted-Average Shares from Time-Vested Conversions Less Assumed Share Repurchases:
Previously granted LTI Plan awards, unvested	114	104	116
Future LTI Plan awards	83	319	248
Weighted-average common shares – diluted	116,458	118,311	121,159

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14. Quarterly Results (Unaudited)

Presented below is a summary of the unaudited quarterly financial information for the years ended December 31, 2019 and 2018 (in thousands, except per-share data):

	2019
	First Quarter		Second Quarter			Third Quarter			Fourth Quarter
Revenues	$	75,433	$	72,730		$	71,949		$	68,725
Net income (loss) attributable to common stockholders	$	3,513	$	47,747	(1)	$	(20,286)	(2)	$	(21,777)	(3)
Net income (loss) attributable to common stockholders per share – basic(4)	$	0.03	$	0.41		$	(0.17)		$	(0.19)
Net income (loss) attributable to common stockholders per share – diluted(4)	$	0.03	$	0.41		$	(0.17)		$	(0.19)
Dividends declared per share	$	0.20	$	0.20		$	0.20		$	0.21

	2018
	First Quarter		Second Quarter			Third Quarter		Fourth Quarter
Revenues	$	73,710	$	75,370		$	73,340	$	75,523
Net income (loss) attributable to common stockholders	$	1,498	$	(3,439)	(5)	$	6,429	$	5,003
Net income (loss) attributable to common stockholders – basic(4)	$	0.01	$	(0.03)		$	0.05	$	0.04
Net income (loss) attributable to common stockholders – diluted(4)	$	0.01	$	(0.03)		$	0.05	$	0.04
Dividends declared per share	$	0.20	$	0.20		$	0.20	$	0.20

⁽¹⁾Net income attributable to common stockholders for the second quarter of 2019 includes a gain on sale of real estate assets of $41.9 million, as described in Note 3, Real Estate Transactions.

⁽²⁾Net loss attributable to common stockholders for the third quarter of 2019 includes an impairment loss on real estate of $23.4 million related to sales of real estate assets, as described in Note 3, Real Estate Transactions.

⁽³⁾Net loss attributable to common stockholders for the third quarter of 2019 includes an impairment loss on real estate of $20.6 million related to sales of real estate assets, as described in Note 2, Summary of Significant Accounting Policies.

⁽⁴⁾Quarterly net income (loss) per share – basic and diluted is calculated based on quarterly basic and diluted weighted-average shares outstanding, respectively.

⁽⁵⁾Net loss attributable to common stockholders for the second quarter of 2018 includes an impairment loss on real estate of $30.8 million related to sales of real estate assets, as described in Note 3, Real Estate Transactions, and a gain on extinguishment of debt of $24.0 million, related to the settlement of a mortgage note, as described in Note 5, Line of Credit and Notes Payable.

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15.  Segment Information

Columbia Property Trust establishes operating segments at the property level, and aggregates individual properties into reportable segments for high-barrier-to-entry markets and other geographic locations in which Columbia Property Trust has significant investments. Columbia Property Trust considers geographic location when evaluating its portfolio composition, and in assessing the ongoing operations and performance of its properties. As of December 31, 2019, Columbia Property Trust had the following reportable segments: New York, San Francisco, Washington, D.C., Boston, Los Angeles, and all other office markets. The all other office markets reportable segment consists of properties in similar low-barrier-to-entry geographic locations in which Columbia Property Trust does not have a substantial presence and/or does not plan to make further investments. Upon selling its remaining properties in Atlanta, Columbia Property Trust has combined Atlanta and the all other office markets reportable segment for all periods presented. During the periods presented, there have been no material intersegment transactions.

Net operating income ("NOI") is a non-GAAP financial measure and is not considered a measure of operating results or cash flows from operations under GAAP. NOI is the primary performance measure reviewed by management to assess operating performance of properties and is calculated by deducting operating expenses from operating revenues. Operating revenues include lease revenues, hotel income, and other property income; and operating expenses include property and hotel operating costs. The NOI performance metric consists of only revenues and expenses directly related to real estate rental operations. NOI reflects property acquisitions and dispositions, occupancy levels, rental rate increases or decreases, and the recoverability of operating expenses. NOI, as Columbia Property Trust calculates it, may not be directly comparable to similarly titled, but differently calculated, measures for other REITs.

Asset information and capital expenditures by segment are not reported because Columbia Property Trust does not use these measures to assess performance. Depreciation and amortization expense, along with other expense and income items, are not allocated among segments.

The following table presents property operating revenues by geographic reportable segment (in thousands):

	For the Years Ended December 31,
	2019		2018		2017
New York(1)	$	157,244	$	158,077	$	123,280
San Francisco(2)	114,295		105,947		105,550
Washington, D.C.(3)	58,200		57,274		36,934
Boston	14,285		13,441		11,559
Los Angeles	7,754		7,783		7,462
All other office markets	41,321		57,395		59,263
Total office segments	393,099		399,917		344,048
Hotel	—		—		1,328
Corporate	3,137		3,165		579
Total	$	396,236	$	403,082	$	345,955

⁽¹⁾Includes operating revenues for 101 Franklin Street from December 2, 2019 through December 31, 2019; and for one unconsolidated property, 114 Fifth Avenue, based on Columbia Property Trust's ownership interest (49.5%) from July 6, 2017 (acquisition date) through December 31, 2019.

⁽²⁾Includes operating revenues for two unconsolidated properties, 333 Market Street and University Circle, based on Columbia Property Trust's ownership interests: 100.0% from January 1, 2017 through July 5, 2017; 77.5% from July 6, 2017 through January 31, 2018; and 55.0% from February 1, 2018 through December 31, 2019.

⁽³⁾Includes operating revenues for two unconsolidated properties, Market Square and 1800 M Street, based on Columbia Property Trust's ownership interests: 51.0% for the Market Square for all periods presented; 55.0% for 1800 M Street from October 11, 2017 (acquisition date) through December 31, 2019.

F-46

A reconciliation of GAAP revenues to operating revenues is presented below (in thousands):

	For the Years Ended December 31,
	2019		2018		2017
Total revenues	$	288,837	$	297,943	$	289,000
Operating revenues included in income (loss) from unconsolidated joint ventures(1)	114,943		112,523		60,737
Less: asset and property management fee income(2)	(7,544)		(7,384)		(3,782)
Total property operating revenues	$	396,236	$	403,082	$	345,955

⁽¹⁾Columbia Property Trust records its interest in properties held through unconsolidated joint ventures using the equity method of accounting, and reflects its interest in the operating revenues of these properties in income (loss) from unconsolidated joint ventures in the accompanying consolidated statements of operations.

⁽²⁾See Note 11, Non-Lease Revenues, of the accompanying consolidated financial statements.

The following table presents net operating income by geographic reportable segment (in thousands):

	For the Years Ended December 31,
	2019		2018		2017
New York(1)	$	93,112	$	94,765	$	73,893
San Francisco(2)	83,305		79,354		76,163
Washington, D.C.(3)	33,953		34,750		18,496
Boston	7,539		7,205		5,380
Los Angeles	4,601		4,590		4,529
All other office markets	35,428		51,638		52,153
Total office segments	257,938		272,302		230,614
Hotel	—		—		(913)
Corporate	(904)		(803)		(826)
Total	$	257,034	$	271,499	$	228,875

⁽¹⁾Includes NOI for the following unconsolidated properties based on Columbia Property Trust's ownership interest:

•114 Fifth Avenue: (49.5%) from July 6, 2017 (acquisition date) through December 31, 2019

•799 Broadway: (49.7%) from October 3, 2018 (acquisition date) through December 31, 2019

⁽²⁾Includes NOI for the following unconsolidated properties based on Columbia Property Trust's ownership interests:

•333 Market Street and University Circle: (100.0%) from January 1, 2017 through July 5, 2017

•333 Market Street and University Circle: (77.5%) from July 6, 2017 through January 31, 2018

•333 Market Street and University Circle: (55.0%) from February 1, 2018 through December, 2019

⁽³⁾Includes NOI for the following unconsolidated properties based on Columbia Property Trust's ownership interest:

•Market Square: (51.0%) for all periods presented

•1800 M Street: (55.0%) from October 11, 2017 (acquisition date) through December 31, 2019

F-47

A reconciliation of GAAP net income to NOI is presented below (in thousands):

	For the Years Ended December 31,
	2019		2018		2017
Net income attributable to common stockholders	$	9,197	$	9,491	$	176,041
Depreciation	78,292		81,795		80,394
Amortization	27,908		32,554		32,403
Impairment loss on real estate assets	43,941		30,812		—
General and administrative – corporate	32,779		32,979		34,966
General and administrative – joint venture	3,567		3,108		1,454
Pre-acquisition costs	6,398		—		—
Net interest expense	42,997		56,477		58,187
Interest income from development authority bonds	—		(6,871)		(7,200)
(Gain) loss on extinguishment of debt	—		(23,340)		325
Income tax expense	21		37		(213)
Asset and property management fee income	(7,544)		(7,384)		(3,782)
Adjustments included in loss from unconsolidated joint venture	61,634		62,603		31,818
Gain on sale of unconsolidated joint venture interest	—		(762)		—
Gains on sales of real estate assets	(42,030)		—		(175,518)
Adjustment attributable to noncontrolling interests	(126)		—		—
Net operating income	$	257,034	$	271,499	$	228,875

16.  Subsequent Events

Columbia Property Trust has evaluated subsequent events in connection with the preparation of its consolidated financial statements and notes thereto included in this report on Form 10-K and noted the following items in addition to those disclosed elsewhere in this report:

On January 24, 2020, Columbia Property Trust acquired Normandy Real Estate Management, LLC, a developer, operator, and investment manager of office and mixed-use assets in New York, Boston, and Washington, D.C. for approximately $100.0 million, exclusive of transaction and closing costs (the "Normandy Acquisition"). The purchase price for the Normandy Acquisition is comprised of two components: an approximately $13.5 million cash payment, and the issuance of 3,264,151 Series A Convertible, Perpetual Preferred Units of Columbia OP with a liquidation preference of $26.50 per unit (the "Preferred OP Units"). The Preferred OP Units are convertible into common units of Columbia OP, which are convertible into shares of Columbia Property Trust's common stock, subject to certain terms and conditions. After giving effect to the Preferred OP Units issued in the Normandy Acquisition, Columbia Property Trust owns approximately 97.2% of the limited partnership interests in Columbia OP.

Columbia Property Trust also notes the following other subsequent events:

•On February 7, 2020, the board of directors declared dividends for the first quarter of 2020 of $0.21 per share, payable on March 17, 2020, to stockholders of record on March 2, 2020.

•On January 24, 2020, in connection with the Normandy Acquisition, Columbia Property Trust issued 128,399 of time-based award shares of Columbia Property Trust stock and 104,968 of performance-based award restricted stock units to Normandy employees that became employees of Columbia Property Trust.

•On January 16, 2020, Columbia Property Trust closed on the sale of Cranberry Woods Drive for $180.0 million and anticipates recognizing a gain on sale of real estate assets in the first quarter of 2020.

•On January 7, 2020, Columbia Property Trust paid an aggregate amount of $24.2 million in dividends for the fourth quarter of 2019 to stockholders of record on December 16, 2019.

F-48

Columbia Property Trust, Inc. Columbia Property Trust Operating Partnership, L.P. Schedule III – Real Estate Assets and Accumulated Depreciation and Amortization December 31, 2019 (in thousands)
							Initial Costs						Costs Capitalized Subsequent to Acquisition		Gross Amount at Which Carried at December 31, 2019						Accumulated Depreciation and Amortization		Date of Construc- tion		Life on Which Depreciation and Amortization is Computed(b)
Description	Location	Owner- ship %		Encum-brances			Land		Buildings and Improvements		Total				Land		Buildings and Improvements		Total(a)					Date Acquired
80 M Street(c)	Washington, D.C.	100	%	None			$	26,248	$	76,269	$	102,517	$	6,732	$	26,806	$	82,443	$	109,249	$	29,214	2001	6/29/2004	0 to 40 years
95 Columbus	Jersey City, NJ	100	%	None			29,061		141,544		170,605		13,137		29,712		154,030		183,742		72,086		1989	10/31/2006	0 to 40 years
Pasadena Corporate Park	Pasadena, CA	100	%	None			53,099		59,630		112,729		(20,992)		41,604		50,133		91,737		22,463		1965/2000/ 2002/2003	7/11/2007	0 to 40 years
Cranberry Woods Drive(c)	Cranberry Township, PA	100	%	None			15,512		173,062		188,574		15,187		15,512		188,249		203,761		58,079		2009/2010	6/1/2010	0 to 40 years
221 Main Street	San Francisco, CA	100	%	None			60,509		174,629		235,138		19,871		60,509		194,500		255,009		41,491		1974	4/22/2014	0 to 40 years
650 California Street	San Francisco, CA	100	%	None			75,384		240,441		315,825		27,757		75,384		268,198		343,582		49,732		1964	9/9/2014	0 to 40 years
315 Park Avenue South	New York, NY	100	%	None			119,633		249,510		369,143		35,718		119,633		285,228		404,861		38,039		1910	1/7/2015	0 to 40 years
116 Huntington Avenue	Boston, MA	100	%	None		(d)	—		116,290		116,290		26,670		—		142,960		142,960		25,824		1991	1/8/2015	0 to 40 years
229 West 43rd Street	New York, NY	100	%	None			207,233		292,991		500,224		2,226		207,233		295,217		502,450		47,597		1912/1924/ 1932/1947	8/4/2015	0 to 40 years
249 West 17th Street	New York, NY	100	%	None			113,149		221,517		334,666		4,354		113,149		225,871		339,020		18,867		1902/1909	10/11/2017	0 to 40 years
218 West 18th Street	New York, NY	100	%	None			43,836		139,077		182,913		5,716		43,836		144,793		188,629		14,868		1912	10/11/2017	0 to 40 years
149 Madison Avenue(e)	New York, NY	100	%	None			59,112		28,989		88,101		22,408		59,112		51,397		110,509		—		(e)	11/28/2017	0 to 40 years
101 Franklin Street(e)	New York, NY	92.5	%	None			57,145		149,500		206,645		2,373		57,145		151,873		209,018		—		(e)	12/2/2019	0 to 40 years
201 California Street	San Francisco, CA	100	%	None			77,833		170,754		248,587		3,334		77,833		174,088		251,921		719		1948	12/9/2019	0 to 40 years
TOTAL CONSOLIDATED REAL ESTATE ASSETS(f)							$	937,754	$	2,234,203	$	3,171,957	$	164,491	$	927,468	$	2,408,980	$	3,336,448	$	418,979
UNCONSOLIDATED REAL ESTATE ASSETS (presented at 100% of the Joint Venture's Basis)(g):
Market Square	Washington, D.C.	51.0	%	$	325,000		$	152,629	$	450,757	$	603,386	$	(15,552)	$	152,629	$	435,205	$	587,834	$	59,629	1990	10/28/2015	0 to 40 years
University Circle	East Palo Alto, CA	55.0	%	None			27,493		278,288		305,781		(96,941)		27,756		181,084		208,840		13,591		2001/2002/ 2003	7/6/2017	0 to 40 years
333 Market Street	San Francisco, CA	55.0	%	None			114,483		292,840		407,323		(41,230)		114,483		251,610		366,093		20,680		1979	7/6/2017	0 to 40 years
114 Fifth Avenue	New York, NY	49.5	%	None		(h)	—		383,694		383,694		2,301		—		385,995		385,995		52,714		1910	7/6/2017	0 to 40 years
1800 M Street	Washington, D.C.	55.0	%	None			125,735		272,353		398,088		35,285		125,735		307,638		433,373		32,459		1975	10/11/2017	0 to 40 years
799 Broadway(e)	New York, NY	49.7	%	$	113,200		145,991		4,865		150,856		47,001		145,991		51,866		197,857		—		(e)	10/3/2018	0 to 40 years
TOTAL UNCONSOLIDATED REAL ESTATE ASSETS							$	566,331	$	1,682,797	$	2,249,128	$	(69,136)	$	566,594	$	1,613,398	$	2,179,992	$	179,073

^(a)The aggregate cost of consolidated land and buildings and improvements for federal income tax purposes is approximately $3.475 billion.

^(b)Columbia Property Trust assets are depreciated or amortized using the straight-line method over the useful lives of the assets by class. Generally, tenant improvements are amortized over the shorter of economic life or lease term, lease intangibles are amortized over the respective lease term, building improvements are depreciated over 5-25 years, and buildings are depreciated over 40 years.

^(c)80 M Street and Cranberry Woods Drive are owned directly by Columbia Property Trust, Inc.; therefore, they are not consolidated into Columbia OP.

^(d)116 Huntington Avenue is owned subject to a long-term, pre-paid ground lease.

^(e)101 Franklin Street, 149 Madison, and 799 Broadway are under development.

^(f)Consolidated real estate assets excludes $3.2 million of corporate assets.

^(g)The aggregate cost of 100% of the land and buildings and improvements, net of debt, held by unconsolidated joint ventures for federal income tax purposes is approximately $1.834 billion.

^(h)Property is owned subject to a long-term ground lease.

S-1

Columbia Property Trust, Inc.

Columbia Property Trust Operating Partnership, L.P.

Schedule III – Real Estate Assets and Accumulated Depreciation and Amortization

(in thousands)

	For the Years Ended December 31,
	2019		2018		2017
Real Estate:
Balance at beginning of year	$	3,345,301	$	3,612,294	$	4,243,531
Additions to/improvements of real estate	531,336		87,398		698,567
Sale/transfer of real estate	(456,331)		(313,683)		(1,285,915)		(1)
Impairment of real estate	(43,941)		(30,812)		—
Write-offs of building and tenant improvements	(270)		(1,464)		(3,087)
Write-offs of intangible assets(2)	(34,039)		(6,131)		(14,432)
Write-offs of fully depreciated assets	(5,608)		(2,301)		(26,370)
Balance at end of year	$	3,336,448	$	3,345,301	$	3,612,294
Accumulated Depreciation and Amortization:
Balance at beginning of year	$	487,485	$	482,627	$	729,025
Depreciation and amortization expense	90,926		98,858		97,732
Sale/transfer of real estate	(149,708)		(84,965)		(302,157)		(1)
Write-offs of tenant improvements	(228)		(603)		(1,406)
Write-offs of intangible assets(2)	(3,888)		(6,131)		(14,197)
Write-offs of fully depreciated assets	(5,608)		(2,301)		(26,370)
Balance at end of year	$	418,979	$	487,485	$	482,627

⁽¹⁾Includes the transfer of 100% of both University Circle and 333 Market Street to unconsolidated joint ventures, in which Columbia Property Trust currently owned a 55.0% interest as of December 31, 2019.

⁽²⁾Consists of write-offs of intangible lease assets related to lease restructurings, amendments, and terminations.

S-2

EX-4.7

Exhibit 4.7

DESCRIPTION OF THE REGISTRANT'S SECURITIES

REGISTERED PURSUANT TO SECTION 12 OF THE

SECURITIES EXCHANGE ACT OF 1934

The following is a brief description of the common stock, $0.01 par value per share (the “Common Stock”), of Columbia Property Trust, Inc. (the “Company”), which is the only security of the Company registered pursuant to Section 12 of the Securities Exchange Act of 1934 (the “Exchange Act”).

Description of Common Stock

General

We were formed under the laws of the state of Maryland. The rights of our stockholders are governed by Maryland law as well as our charter and bylaws. The following summary of the terms of our common stock, Maryland General Corporation Law (the “MGCL”) and provisions of our charter and bylaws containing material terms of our common stock is only a summary, and reference should be made to the MGCL and our charter and bylaws for a full description. The following summary is qualified in its entirety by the more detailed information contained in our charter and bylaws. Copies of our charter and bylaws are available upon request.

Common Stock

Subject to any preferential rights of any other class or series of stock and to the provisions of our charter regarding the restrictions on the ownership and transfer of common stock, the holders of common stock are entitled to such distributions as may be authorized from time to time by our board of directors out of legally available funds and declared by us and, upon our liquidation, are entitled to receive all assets available for distribution to our stockholders. All common stock issued and outstanding is fully paid and nonassessable. Holders of common stock will not have preemptive rights, which means that they will not have an automatic option to purchase any new shares that we issue, or preference, conversion, exchange, sinking fund or redemption rights. Our charter provides that our common stockholders generally have no appraisal rights unless our board of directors determines prospectively that appraisal rights will apply to one or more transactions in which holders of our common stock would otherwise be entitled to exercise appraisal rights. Shares of our common stock have equal distribution, liquidation and other rights.

Our board of directors has authorized the issuance of shares of our capital stock without certificates. We do not issue certificates for our shares. Shares are held in “uncertificated” form which eliminates the physical handling and safekeeping responsibilities inherent in owning transferable share certificates and eliminate the need to return a duly executed share certificate to effect a transfer. Information regarding restrictions on the transferability of our shares that, under Maryland law, would otherwise have been required to appear on our share certificates will instead be furnished to stockholders upon request and without charge. We maintain a stock ledger that contains the name and address of each stockholder and the number of shares that the stockholder holds. With respect to uncertificated stock, we will continue to treat the stockholder registered on our stock ledger as the owner of the shares until the new owner delivers a properly executed form to us, which form we will provide to any registered holder upon request.

Preferred Stock

Our charter authorizes our board of directors to designate and issue one or more classes or series of preferred stock without stockholder approval. Our board of directors may determine the relative rights, preferences and privileges of each class or series of preferred stock so issued, which may be more beneficial than the rights, preferences and privileges attributable to the common stock. The issuance of preferred stock could have the effect of delaying or preventing a change in control. We currently have no preferred stock issued or

outstanding. Our board of directors has no present plans to issue preferred stock, but may do so at any time in the future without stockholder approval.

Power to Reclassify Our Unissued Shares of Stock

Our charter authorizes our board of directors to classify any unissued shares of preferred stock and to reclassify any previously classified but unissued shares of common or preferred stock into one or more classes or series of preferred stock without any action by our stockholders. Prior to the issuance of shares of each class or series, our board of directors is required by Maryland law and by our charter to set, subject to the provisions of our charter regarding the restrictions on transfer and ownership of our stock, the preferences, conversion or other rights, voting powers, restrictions, limitations as to dividends or other distributions, qualifications and terms and conditions of redemption of each such class or series. As a result, our board of directors could authorize the issuance of shares of preferred stock that have priority over shares of our common stock with respect to dividends or other distributions or rights upon liquidation or with other terms and conditions that could have the effect of delaying, deferring or preventing a transaction or a change of control of our company that might involve a premium price for holders of our common stock or that our common stockholders otherwise believe to be in their best interests. As of the date hereof, no shares of preferred stock are outstanding and we have no present plans to issue any shares of preferred stock.

Power to Increase or Decrease Authorized Shares of Common Stock and Issue Additional Shares of Common and Preferred Stock

Our charter authorizes our board of directors to amend our charter without stockholder approval to increase or decrease the number of authorized shares of stock, to issue additional authorized but unissued shares of common or preferred stock and to classify or reclassify unissued shares of common or preferred stock and thereafter to issue such classified or reclassified shares of stock without any action by our stockholders. We believe that the power to classify or reclassify unissued shares of stock and thereafter issue the classified or reclassified shares provides us with increased flexibility in structuring possible future financings and acquisitions and in meeting other needs that might arise. The additional classes or series, as well as the additional authorized shares of common stock, will be available for issuance without further action by our stockholders, unless such action is required by applicable law or the rules of any stock exchange or market system on which our securities may be listed or traded. Although our board of directors does not currently intend to do so, it could authorize us to issue a class or series of stock that could, depending upon the terms of the particular class or series, delay, defer or prevent a transaction or a change of control of our company that might involve a premium price for holders of our common stock or that our common stockholders otherwise believe to be in their best interests.

Meetings and Special Voting Requirements

Subject to our charter restrictions on ownership and transfer of our stock and except as may otherwise be specified in the terms of any class or series of common stock, each holder of common stock is entitled at each meeting of stockholders to one vote per share owned by such stockholder on all matters submitted to a vote of stockholders, including the election of directors. Each of our directors is elected to serve for a one-year term, until the next annual meeting of stockholders and until his or her successor is duly elected and qualifies. There is no cumulative voting in the election of our board of directors. A nominee for director is elected only if such nominee receives the affirmative vote of a majority of the total votes cast with respect to such nominee, provided that if the number of nominees exceeds the number of directors to be elected, the directors are elected by a plurality of the votes cast in the election of the directors.

An annual meeting of our stockholders will be held each year. Special meetings of stockholders may be called only upon the request of our board of directors, the chairman of the board, the president, the chief executive officer and, subject to certain procedural requirements set forth in our Bylaws, must be called by our Secretary to act on any matter that may properly be considered at a meeting of shareholders upon the written request of shareholders entitled to cast at least a majority of the votes entitled to be cast on such matter at such

meeting. The presence, either in person or by proxy, of stockholders entitled to cast a majority of all the votes entitled to be cast at a meeting on any matter will constitute a quorum.

Pursuant to our charter and the MGCL, we cannot dissolve, amend our charter, merge, sell all or substantially all of our assets, engage in a share exchange or engage in similar transactions outside the ordinary course of business unless declared advisable by our board of directors and approved by the affirmative vote of stockholders holding at least a majority of all the votes entitled to be cast on the matter. However, under the MGCL and our charter, the following events do not require stockholder approval:

•stock exchanges in which we are the successor; and

•transfers of less than substantially all of our assets.

Also, because our operating assets are held by our subsidiaries, these subsidiaries may be able to merge or sell all or substantially all of their assets without the approval of our stockholders.

No Stockholder Rights Plan

We have no stockholder rights plan. Our bylaws contain a provision preventing the board of directors from adopting a stockholder rights plan without the prior approval of the stockholders unless such plan provides that it will expire within one year of adoption unless ratified by the stockholders before the plan expires. Our bylaws further prevent the board of directors from amending this limitation without stockholder approval.

Business Combinations

Under the MGCL, certain “business combinations” (including a merger, consolidation, share exchange or, in certain circumstances, an asset transfer or issuance or reclassification of equity securities) between a Maryland corporation and any interested stockholder, or an affiliate of such an interested stockholder, are prohibited for five years following the most recent date on which the interested stockholder became an interested stockholder. Maryland law defines an interested stockholder as:

•any person who beneficially owns, directly or indirectly, 10% or more of the voting power of the corporation’s outstanding voting stock after the date on which the corporation had 100 or more beneficial owners of its stock; or

•an affiliate or associate of the corporation who, at any time within the two-year period prior to the date in question and after the date on which the corporation had 100 or more beneficial owners of its stock, was the beneficial owner, directly or indirectly, of 10% or more of the voting power of the then outstanding voting stock of the corporation.

After such five-year period, any such business combination 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; 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.

These supermajority approval requirements do not apply if, among other conditions, the corporation’s common stockholders receive a minimum price (as defined in the MGCL) for their shares and the consideration is received in cash or in the same form as previously paid by the interested stockholder for its shares.

These provisions of the MGCL do not apply, however, to business combinations that are approved or exempted by a corporation’s board of directors prior to the time that the interested stockholder becomes an interested stockholder. Our board of directors has adopted a resolution exempting any business combinations between us and any other person or entity from the business combination provisions of the MGCL. Our bylaws provide that resolution may only be revoked, altered or amended, and the board of directors may only adopt any resolution inconsistent with such resolution (including an amendment to that bylaw provision), with the affirmative vote of a majority of the votes cast on the matter by holders of outstanding shares of the Company's common stock. However, we cannot assure you that our board of directors will not recommend to stockholders that the board of directors revoke, alter or amend this resolution in the future.

Control Share Acquisitions

The MGCL provides that holders of “control shares” of a Maryland corporation acquired in a “control share acquisition” have no voting rights with respect to any control shares except to the extent approved at a special meeting of stockholders by the affirmative vote of at least two-thirds of the votes entitled to be cast on the matter, excluding shares of stock of a corporation in respect of which any of the following persons is entitled to exercise or direct the exercise of the voting power of such shares in the election of directors: (a) a person who makes or proposes to make a control share acquisition; (b) an officer of the corporation; or (c) an employee of the corporation who is also a director of the corporation. “Control shares” are voting shares of stock which, if aggregated with all other such shares of stock previously acquired by the acquirer or in respect of which the acquirer is able to exercise or direct the exercise of voting power (except solely by virtue of a revocable proxy), would entitle the acquirer to exercise voting power in electing directors within one of the following ranges of voting power:

•one-tenth or more but less than one-third;

•one-third or more but less than a majority; or

•a majority or more of all voting power.

Control shares do not include shares that the acquiring person is then entitled to vote as a result of having previously obtained stockholder approval. A “control share acquisition” means the acquisition, directly or indirectly, 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.

A person who has made or proposes to make a control share acquisition, upon satisfaction of certain conditions (including an undertaking to pay expenses and making an “acquiring person statement” as described in the MGCL), may compel our board of directors to call a special meeting of stockholders to be held within 50 days of demand to consider the voting rights of the shares acquired or to be acquired in the control share acquisition. If no request for a special meeting is made, the corporation may itself present the question at any stockholders meeting.

If voting rights of control shares are not approved at the meeting or if the acquiring person does not deliver an “acquiring person statement” as required by the statute, then, subject to certain conditions and limitations, the corporation may redeem any or all of the control shares (except those for which voting rights have previously been approved) for fair value determined, without regard to the absence of voting rights for the control shares, as of the date of the last control share acquisition by the acquirer or of any meeting of stockholders at which the voting rights of such shares are considered and not approved. If voting rights for control shares are approved at a stockholders meeting and the acquirer becomes entitled to vote a majority of the shares entitled to vote, all other stockholders may exercise appraisal rights, unless appraisal rights are eliminated under the charter. Our charter eliminates all appraisal rights of stockholders.

The control share acquisition provisions of the MGCL do not apply to: (a) shares acquired in a merger, consolidation or share exchange if the corporation is a party to the transaction, or (b) acquisitions approved or exempted by the charter or bylaws of the corporation.

Our bylaws contain a provision exempting the Company from the control share acquisition provisions of the MGCL. This bylaw provision may be amended only with the affirmative vote of a majority of the votes entitled to be cast on such an amendment by holders of outstanding shares of our common stock.

Unsolicited Takeovers

Under Subtitle 8 of Title 3 of the MGCL, a Maryland corporation with a class of equity securities registered under the Exchange Act and at least three directors who are not officers or employees of the corporation, and who are not affiliated with a person who is seeking to acquire control of the corporation, may elect to be subject, by provision in its charter or bylaws or a resolution of its board of directors and notwithstanding any contrary provision in the charter or bylaws, to any or all of the following five provisions:

•classified board requirement;

•a two-thirds vote requirement for removing a director;

•a requirement that the number of directors be fixed only by vote of the directors;

•a requirement that a vacancy on the board be filled only by the remaining directors and for the remainder of the full term of the class of directors in which the vacancy occurred; or

•a requirement for the calling of a special meeting of stockholders only at the written request of stockholders entitled to cast at least a majority of the votes at the meeting.

Our charter provides that our board of directors will not take action to elect to be subject to the provisions of Subtitle 8 except 3-804(c) of the MGCL, which permits a company to include a provision in its charter requiring a vacancy on the board of directors be filled only by the remaining directors and any director so elected to serve for the remainder of the full term of the class of directors in which the vacancy occurred, which provision is included in our charter. Through provisions in our charter and bylaws unrelated to Subtitle 8, we already (1) require a majority vote for the removal of any director from the board of directors, (2) vest in the board of directors the exclusive power to fix the number of directorships, subject to limitations set forth in our charter and bylaws, (3) require a vacancy on the board of directors be filled only by the remaining directors and any director so elected to serve for the remainder of the full term of the class of directors in which the vacancy occurred and (4) require, unless called by our board of directors, the chairman of the board, the president, the chief executive officer, the request of stockholders entitled to cast not less than a majority of all votes entitled to be cast on a matter at such meeting to call a special meeting to consider and vote on any matter that may properly be considered at a meeting of stockholders. As a result, the effect of the restriction on electing to be subject to the provisions of Subtitle 8 is to prevent us, without the approval of the stockholders, from classifying our board of directors or from raising the threshold for removal of a director from a majority to two-thirds of the shares entitled to be cast generally in the election of directors.

Restriction on Ownership of Shares

In order for us to qualify as a real estate investment trust, or REIT, not more than 50% of our outstanding shares may be owned by any five or fewer individuals, including some tax-exempt entities. In addition, the outstanding shares must be owned by 100 or more persons independent of us and each other during at least 335 days of a 12-month taxable year or during a proportionate part of a shorter taxable year. We may prohibit certain acquisitions and transfers of shares so as to ensure our continued qualification as a REIT under the Internal Revenue Code.

In order to assist us in preserving our status as a REIT, our charter contains a limitation on ownership that prohibits any person or group of persons from acquiring, directly or indirectly, beneficial ownership of more than 9.8% of our outstanding shares. Our charter provides that any transfer of shares that would violate our share ownership limitations is null and void and the intended transferee will acquire no rights in such shares, unless the transfer is approved by our board of directors based upon receipt of information that such transfer would not violate the provisions of the Internal Revenue Code for qualification as a REIT.

Shares which, if transferred, would be in excess of the ownership limit will be designated as “shares-in-trust” and will be transferred automatically to a trust effective on the day before the reported transfer of such shares. The record holder of the shares that are designated as shares-in-trust will be required to submit such number of shares to us in the name of the trustee of the trust. We will designate a trustee of the share trust that will not be affiliated with us. We will also name one or more charitable organizations as a beneficiary of the share trust. Shares-in-trust will remain issued and outstanding shares and will be entitled to the same rights and privileges as all other shares of the same class or series. The trustee will receive all dividends and distributions on the shares-in-trust and will hold such dividends or distributions in trust for the benefit of the beneficiary. The trustee will vote all shares-in-trust during the period they are held in trust.

At our direction, the trustee will transfer the shares-in-trust to a person whose ownership will not violate the ownership limit. The transfer shall be made within 20 days of our receipt of notice that shares have been transferred to the trust. During this 20-day period, we will have the option of redeeming such shares. Upon any such transfer or redemption, the purported transferee or holder shall receive a per share price equal to the lesser of (1) the price per share in the transaction that created such shares-in-trust, or (2) the market price per share on the date of the transfer or redemption.

Any person who (1) acquires shares in violation of the foregoing restrictions or who owns shares that were transferred to any such trust is required to give immediate written notice to us of such event, or (2) transfers or receives shares subject to such limitations is required to give us 15 days written notice prior to such transaction. In both cases, such persons shall provide to us such other information as we may request in order to determine the effect, if any, of such transfer on our status as a REIT.

The foregoing restrictions will continue to apply until (1) our board of directors determines it is no longer in our best interest to continue to qualify as a REIT, and (2) there is an affirmative vote of the majority of shares entitled to vote on such matter at a regular or special meeting of our stockholders.

The ownership limit does not apply to an offer or which, in accordance with applicable federal and state securities laws, makes a cash tender offer and at least 85% of the outstanding shares are duly tendered and accepted pursuant to the cash tender offer. The ownership limit also does not apply to the underwriter in a public offering of shares or to a person or persons exempted from the ownership limit by our board of directors based upon appropriate assurances that our qualification as a REIT is not jeopardized.

Any person who owns 5% or more of the outstanding shares during any taxable year will be asked to deliver a statement or affidavit setting forth the number of shares beneficially owned, directly or indirectly.

Dividends

We are required to make distributions sufficient to satisfy the requirements for qualification as a REIT for tax purposes. Generally, income distributed as dividends will not be taxable to us under the Internal Revenue Code if we distribute at least 90% of our taxable income. One of our primary goals is to pay regular quarterly distributions to our stockholders. Distributions will be paid to investors who are stockholders as of the record dates selected by our board of directors. Distributions are declared at the discretion of our board of directors.

Stockholder Liability

The MGCL provides that our stockholders:

•are not liable personally or individually in any manner whatsoever for any debt, act, omission or obligation incurred by us or our board of directors; and

•are under no obligation to us or our creditors with respect to their shares other than the obligation to pay to us the full amount of the consideration for which their shares were issued.

Advance Notice of Director Nominations and New Business

Our bylaws provide that:

•with respect to an annual meeting of stockholders, nominations of individuals for election to the board of directors and the proposal of business to be considered by stockholders at the annual meeting may be made only:

◦pursuant to our notice of the meeting;

◦by or at the direction of our board of directors; or

◦by a stockholder who was a stockholder of record both at the time of giving of the notice required by our bylaws and at the time of the annual meeting, who is entitled to vote at the meeting in the election of each individual so nominated or on such other business and who has provided notice to us with respect to the time period containing the information and certifications, required by the advance notice procedures set forth in our bylaws.

•with respect to special meetings of stockholders, only the business specified in our notice of meeting may be brought before the meeting of stockholders, and nominations of individuals for election to our board of directors may be made only:

◦by or at the direction of our board of directors, the chairman of the board, the president or the chief executive officer; or

◦provided that the meeting has been called for the purpose of electing directors, by a stockholder who is a stockholder of record both at the time of giving of the notice required by our bylaws and at the time of the meeting, who is entitled to vote at the meeting in the election of each individual so nominated and who has provided notice to us within the time period and containing the information and certifications required by the advance notice procedures set forth in our bylaws.

The purpose of requiring stockholders to give advance notice of nominations and other proposals is to afford our board of directors the opportunity to consider the qualifications of the proposed nominees or the advisability of the other proposals and, to the extent considered necessary by our board of directors, to inform stockholders and make recommendations regarding the nominations or other proposals. The advance notice procedures also permit a more orderly procedure for conducting our stockholder meetings.

EX-21.1

Exhibit 21.1

Subsidiaries of the Registrant

Columbia Property Trust Operating Partnership, L.P. (“Columbia Property Trust OP”)

Columbia KCP TRS, LLC

Columbia Market Square GP, LLC

Columbia OP LP, LLC

Columbia Property Trust Advisory Services, LLC

Columbia Property Trust Services, LLC

Columbia Property Trust TRS, LLC

Wells REIT II - 80 M Street, LLC

Wells REIT II - Cranberry Woods Development, Inc.

Wells REIT II Texas, Inc.

Indirect Subsidiaries of the Registrant

Columbia MSQ TRS, LLC

Columbia REIT - Market Square East & West, LLC

Market Square East & West, LP

Market Square REIT East & West, LLC

Wells REIT II - 5 Houston Center, LP

Wells TRS II - Concierge, LLC

Direct Subsidiaries of Columbia Property Trust OP

Columbia Development TRS 13, LLC

Columbia Development TRS 87, LLC

Columbia REIT - 114 Fifth Ave, LLC

Columbia REIT - 116 Huntington, LLC

Columbia REIT - 149 Madison, LLC

Columbia REIT - 1800 M REIT GP, LLC

Columbia REIT - 1800 M REIT LP, LLC

Columbia REIT - 201 California, LLC

Columbia REIT - 218 W. 18th, LLC

Columbia REIT - 221 Main, LLC

Columbia REIT - 229 W. 43rd Street, LLC

Columbia REIT - 245-249 17th LLC

Columbia REIT - 250 Church Member, LLC

Columbia REIT - 250 Church Investor, LLC

Columbia REIT - 315 Park Avenue South, LLC

Columbia REIT - 333 Market Street GP, LLC

Columbia REIT - 650 California, LLC

Columbia REIT – 799 Broadway, LLC

Columbia REIT – LCC Retail, LLC

Columbia REIT - University Circle GP, LLC

Wells International Real Estate II (CY) Ltd

Wells REIT II - International Financial Tower, LLC

Wells REIT II - Lindbergh Center, LLC

Wells REIT II - One Glenlake, LLC

Wells REIT II - Pasadena Corporate Park, LLC

Wells REIT II - Pasadena Corporate Park, LP

Wells REIT II - Three Glenlake, LLC

Indirect Subsidiaries of OP

1800 M Owner GP, LLC

1800 M REIT GP, LLC

1800 M Street Owner, LP

1800 M Street REIT, LP

1800 M Street TRS, LP

1800 M Street Venture, LP

Columbia REIT - University Circle, LP

Columbia REIT - 333 Market Street, LP

Eastvale Finance Limited

Three Glenlake Building, LLC

EX-23.1

Exhibit 23.1

COLUMBIA PROPERTY TRUST, INC.

COLUMBIA PROPERTY TRUST OPERATING PARTNERSHIP, L.P.

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in the following Registration Statements:

(1)Registration Statement (Form S-3 No 333-223062) of Columbia Property Trust, Inc. and Columbia Property Trust Operating Partnership, L.P.;

(2)Registration Statement (Form S-8 No 333-188409) pertaining to the Columbia Property Trust, Inc. 2013 Long-term Incentive Plan;

(3)Registration Statement (Form S-8 No 333-217720) pertaining to the Columbia Property Trust, Inc. Amended and Restated 2013 Long-term Incentive Plan;

of our reports dated February 13, 2020, relating to the consolidated financial statements and financial statement schedule of Columbia Property Trust, Inc. and subsidiaries (the “Company”), and Columbia Property Trust Operating Partnership, L.P. and subsidiaries (“the Partnership”), and the effectiveness of the Company’s internal control over financial reporting of the Company, appearing in this Annual Report on Form 10-K of the Company and the Partnership for the year ended December 31, 2019.

/s/ Deloitte & Touche LLP

Atlanta, Georgia

February 13, 2020

EX-31.1

EXHIBIT 31.1

COLUMBIA PROPERTY TRUST, INC.

PRINCIPAL EXECUTIVE OFFICER CERTIFICATION

PURSUANT TO

SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

(18 U.S.C. 1350)

I, E. Nelson Mills, certify that:

1.I have reviewed this annual report on Form 10-K of Columbia Property Trust, Inc. for the year ended December 31, 2019;

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(s) 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(s) 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.

Dated:	February 13, 2020	By:	/s/ E. Nelson Mills
			E. Nelson Mills
			Principal Executive Officer

EX-31.2

EXHIBIT 31.2

COLUMBIA PROPERTY TRUST, INC.

PRINCIPAL FINANCIAL OFFICER CERTIFICATION

PURSUANT TO

SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

(18 U.S.C. 1350)

I, James A. Fleming, certify that:

1.I have reviewed this annual report on Form 10-K of Columbia Property Trust, Inc. for the year ended December 31, 2019;

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(s) 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(s) 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.

Dated:	February 13, 2020	By:	/s/ James A. Fleming
			James A. Fleming
			Principal Financial Officer

EX-31.3

EXHIBIT 31.3

COLUMBIA PROPERTY TRUST OPERATING PARTNERSHIP, L.P.

PRINCIPAL EXECUTIVE OFFICER CERTIFICATION

PURSUANT TO

SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

(18 U.S.C. 1350)

I, E. Nelson Mills, certify that:

1.I have reviewed this annual report on Form 10-K of Columbia Property Trust Operating Partnership, L.P. for the year ended December 31, 2019;

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(s) 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(s) 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.

Dated:	February 13, 2020	By:	/s/ E. Nelson Mills
			E. Nelson Mills
			Principal Executive Officer

EX-31.4

EXHIBIT 31.4

COLUMBIA PROPERTY TRUST OPERATING PARTNERSHIP, L.P.

PRINCIPAL FINANCIAL OFFICER CERTIFICATION

PURSUANT TO

SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

(18 U.S.C. 1350)

I, James A. Fleming, certify that:

1.I have reviewed this annual report on Form 10-K of Columbia Property Trust, Inc. for the year ended December 31, 2019;

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(s) 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(s) 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.

Dated:	February 13, 2020	By:	/s/ James A. Fleming
			James A. Fleming
			Principal Financial Officer

EX-32.1

EXHIBIT 32.1

COLUMBIA PROPERTY TRUST, INC.

CERTIFICATION OF PRINCIPAL EXECUTIVE OFFICER

AND PRINCIPAL FINANCIAL OFFICER

PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

(18 U.S.C. 1350)

In connection with the Annual Report of Columbia Property Trust, Inc. (the “Registrant”) on Form 10-K for the year ended December 31, 2019, as filed with the Securities and Exchange Commission (the “Report”), the undersigned, E. Nelson Mills, Principal Executive Officer of the Registrant, and James A. Fleming, Principal Financial Officer of the Registrant, hereby certify, pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (18 U.S.C. 1350) that, to the best of our knowledge and belief:

(1)The Report fully complies with the requirements of Section 13(a) or 15(d) 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 Registrant.

/s/ E. NELSON MILLS

E. Nelson Mills
Principal Executive Officer

February 13, 2020

/s/ JAMES A. FLEMING

James A. Fleming
Principal Financial Officer

February 13, 2020

EX-32.2

EXHIBIT 32.2

COLUMBIA PROPERTY TRUST OPERATING PARTNERSHIP, L.P.

CERTIFICATION OF PRINCIPAL EXECUTIVE OFFICER

AND PRINCIPAL FINANCIAL OFFICER

PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

(18 U.S.C. 1350)

In connection with the Annual Report of Columbia Property Trust, Inc. (the “Registrant”) on Form 10-K for the year ended December 31, 2019, as filed with the Securities and Exchange Commission (the “Report”), the undersigned, E. Nelson Mills, Principal Executive Officer of the Registrant, and James A. Fleming, Principal Financial Officer of the Registrant, hereby certify, pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (18 U.S.C. 1350) that, to the best of our knowledge and belief:

(1)The Report fully complies with the requirements of Section 13(a) or 15(d) 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 Registrant.

/s/ E. NELSON MILLS

E. Nelson Mills
Principal Executive Officer

February 13, 2020

/s/ JAMES A. FLEMING

James A. Fleming
Principal Financial Officer

February 13, 2020

XML

Real Estate Transactions (Tables)

12 Months Ended

Dec. 31, 2019

Business Acquisitions and Dispositions [Abstract]

Interests in Properties Acquired

During 2019, 2018, and 2017, Columbia Property Trust acquired the following properties:

Property	Location	Date	Percent Acquired		Purchase Price (in thousands)(1)
2019
201 California Street	San Francisco, CA	December 9, 2019	100.0	%	$	238,900
101 Franklin Street(2)	New York, NY	December 2, 2019	92.5	%	$	205,500
2018
Lindbergh Center – Retail	Atlanta, GA	October 24, 2018	100.0	%	$	23,000
799 Broadway	New York, NY	October 3, 2018	49.7	%	$	30,200	(3)
2017
149 Madison Avenue	New York, NY	November 28, 2017	100.0	%	$	87,700
1800 M Street	Washington, D.C.	October 11, 2017	55.0	%	$	231,550	(3)
249 West 17th Street & 218 West 18th Street	New York, NY	October 11, 2017	100.0	%	$	514,100
114 Fifth Avenue	New York, NY	July 6, 2017	49.5	%	$	108,900	(3)

⁽¹⁾Exclusive of transaction costs and price adjustments. See purchase price allocation table below for a breakout of the net purchase price for wholly owned properties.

⁽²⁾Property is owned through a consolidated joint venture.

⁽³⁾These properties are owned through unconsolidated joint ventures. Purchase price is for Columbia Property Trust's partial interests in the properties.

Purchase Price Allocations for Consolidated Property Acquisitions

	201 California Street		101 Franklin Street(1)		149 Madison Avenue		249 West 17th Street		218 West 18th Street
Location	San Francisco, CA		New York, NY		New York, NY		New York, NY		New York, NY
Date Acquired	December 9, 2019		December 2, 2019		November 28, 2017		October 11, 2017		October 11, 2017
Purchase Price:
Land	$	77,833	$	57,145	$	59,112	$	113,149	$	43,836
Building and improvements	157,513		149,500		28,989		194,109		126,957
Intangible lease assets	13,241		—		—		27,408		12,120
Intangible lease origination costs	5,785		—		—		13,062		4,168
Intangible below market lease liability	(8,064)		—		—		(7,131)		(11,757)
Total purchase price	$	246,308	$	206,645	$	88,101	$	340,597	$	175,324

⁽¹⁾Owned through a consolidated joint venture, in which Columbia Property Trust owns a 92.5% interest.

Business Acquisition, Pro Forma Information

The following unaudited pro forma statements of operations presented for 2019, 2018, and 2017, have been prepared for Columbia Property Trust to give effect to the acquisitions of 201 California Street and 101 Franklin Street as if the acquisitions had occurred on January 1, 2018; and 249 West 17th Street, 218 West 18th Street, and 149 Madison Avenue as if the acquisitions had occurred on January 1, 2016. The following unaudited pro forma financial results for Columbia Property Trust have been prepared for informational purposes only and are not necessarily indicative of future results or of actual results that would have been achieved had these acquisitions been consummated as of January 1, 2018 and January 1, 2016 (in thousands):

	2019		2018		2017
Revenues	$	304,756	$	312,003	$	319,064
Net income attributable to common stockholders of Columbia Property Trust	$	17,600	$	16,822	$	183,318

Schedule of Properties Sold

During 2019, 2018, and 2017, Columbia Property Trust sold the following properties and partial interest in properties of unconsolidated joint ventures. Additional information for certain of the dispositions is provided below the table.

Property	Location	Date	% Sold		Sale Price(1) (in thousands)			Gain on Sale (in thousands)
2019
Lindbergh Center	Atlanta, GA	September 26, 2019	100.0	%	$	187,000		$	—
One & Three Glenlake Parkway	Atlanta, GA	April 15, 2019	100.0	%	$	227,500		$	42,030
2018
222 East 41st Street	New York, NY	May 29, 2018	100.0	%	$	332,500		$	—
263 Shuman Boulevard	Chicago, IL	April 13, 2018	100.0	%	$	49,000		$	24,039
University Circle & 333 Market Street Joint Ventures	San Francisco, CA	February 1, 2018	22.5	%	$	235,300	(2)	$	762
2017
University Circle & 333 Market Street	San Francisco, CA	July 6, 2017	22.5	%	$	234,000	(2)	$	102,365
Key Center Tower & Marriott	Cleveland, OH	January 31, 2017	100.0	%	$	267,500		$	9,466
Houston Properties	Houston, TX	January 6, 2017	100.0	%	$	272,000		$	63,688

⁽¹⁾Exclusive of transaction costs and price adjustments.

(2)Sales price is for the partial interests in the properties or joint ventures that were sold.

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Subsequent Events

12 Months Ended

Dec. 31, 2019

Subsequent Events [Abstract]

Subsequent Events

Subsequent Events

Columbia Property Trust has evaluated subsequent events in connection with the preparation of its consolidated financial statements and notes thereto included in this report on Form 10-K and noted the following items in addition to those disclosed elsewhere in this report:

On January 24, 2020, Columbia Property Trust acquired Normandy Real Estate Management, LLC, a developer, operator, and investment manager of office and mixed-use assets in New York, Boston, and Washington, D.C. for approximately $100.0 million, exclusive of transaction and closing costs (the "Normandy Acquisition"). The purchase price for the Normandy Acquisition is comprised of two components: an approximately $13.5 million cash payment, and the issuance of 3,264,151 Series A Convertible, Perpetual Preferred Units of Columbia OP with a liquidation preference of $26.50 per unit (the "Preferred OP Units"). The Preferred OP Units are convertible into common units of Columbia OP, which are convertible into shares of Columbia Property Trust's common stock, subject to certain terms and conditions. After giving effect to the Preferred OP Units issued in the Normandy Acquisition, Columbia Property Trust owns approximately 97.2% of the limited partnership interests in Columbia OP.

Columbia Property Trust also notes the following other subsequent events:

•On February 7, 2020, the board of directors declared dividends for the first quarter of 2020 of $0.21 per share, payable on March 17, 2020, to stockholders of record on March 2, 2020.

•On January 24, 2020, in connection with the Normandy Acquisition, Columbia Property Trust issued 128,399 of time-based award shares of Columbia Property Trust stock and 104,968 of performance-based award restricted stock units to Normandy employees that became employees of Columbia Property Trust.

•On January 16, 2020, Columbia Property Trust closed on the sale of Cranberry Woods Drive for $180.0 million and anticipates recognizing a gain on sale of real estate assets in the first quarter of 2020.

•On January 7, 2020, Columbia Property Trust paid an aggregate amount of $24.2 million in dividends for the fourth quarter of 2019 to stockholders of record on December 16, 2019.

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Income Taxes

12 Months Ended

Dec. 31, 2019

Income Tax Disclosure [Abstract]

Income Taxes

Income Taxes

Columbia Property Trust's income tax basis net income during 2019, 2018, and 2017 (in thousands) follows:

	2019		2018		2017
GAAP basis financial statement net income attributable to common stockholders	$	9,197	$	9,491	$	176,041
Increase (Decrease) in Net Income Resulting From:
Depreciation and amortization expense for financial reporting purposes in excess of amounts for income tax purposes	41,648		43,753		33,918
Rental income accrued for financial reporting purposes in excess of (less than) amounts for income tax purposes	(10,373)		7,145		(38,426)
Net amortization of above-/below-market lease intangibles for financial reporting purposes less than amounts for income tax purposes	(5,107)		(5,990)		(6,091)
Interest expense for financial reporting purposes in excess of amounts for income tax purposes	5,852		—		—
Bad debt expense for financial reporting purposes less than (in excess of) amounts for income tax purposes	1		4		(31)
Income from unconsolidated joint ventures for financial reporting purposes in excess of amount for income tax purposes	15,224		16,654		13,902
Gains or losses on disposition of real property for financial reporting purposes that are more favorable than amounts for income tax purposes	(57,284)		79,376		(126,770)
Other expenses or revenues for financial reporting purposes in excess (less than) of amounts for income tax purposes	37,912		(32,342)		11,331
Income tax basis net income, prior to dividends-paid deduction	$	37,070	$	118,091	$	63,874

As of December 31, 2019, the tax basis carrying value of Columbia Property Trust's total assets was approximately $4.4 billion. For income tax purposes, distributions to common stockholders are characterized as ordinary income, capital gains, or as a return of a stockholder's invested capital. Columbia Property Trust's distributions per common share are summarized as follows:

	2019		2018		2017
Ordinary income	53.1	%	100.0	%	58.5	%
Capital gains	—	%	—	%	—	%
Return of capital	46.9	%	—	%	41.5	%
Total	100.0	%	100.0	%	100.0	%

As of December 31, 2019, returns for the calendar years 2015 through 2019 remain subject to examination by U.S. or various state tax jurisdictions.

No provisions for federal income taxes have been made in the accompanying consolidated financial statements, other than the provisions relating to the TRS Entities, as Columbia Property Trust made distributions in excess of taxable income for the periods presented. Columbia Property Trust is subject to certain state and local taxes related

to property operations in certain locations, which have been provided for in the accompanying consolidated financial statements. The income taxes recorded by the TRS Entities for the years ended December 31, 2019, 2018, and 2017, are as follows:

	Years Ended December 31,
	2019		2018		2017
Federal income tax	$	14	$	63	$	188
State income tax	6		(26)		38
Total income tax	$	20	$	37	$	226

As of December 31, 2019 and 2018, Columbia Property Trust had deferred tax assets of $0.2 million, which are included in prepaid expenses and other assets in the accompanying consolidated balance sheets.

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Summary of Significant Accounting Policies (Narrative) (Details)		3 Months Ended			12 Months Ended
	Sep. 26, 2019 USD ($)	Dec. 31, 2019 USD ($) bond $ / shares shares	Sep. 30, 2019 USD ($)	Jun. 30, 2018 USD ($)	Dec. 31, 2019 USD ($) bond $ / shares shares	Dec. 31, 2018 USD ($) bond $ / shares	Dec. 31, 2017 USD ($)	May 25, 2018 USD ($)
Property, Plant and Equipment [Line Items]
Interest capitalized to investments in unconsolidated joint ventures					$ 5,100,000	$ 3,800,000
Impairment loss on real estate assets			$ 23,400,000	$ 30,800,000	43,941,000	30,812,000	$ 0
Accumulated depreciation of lease assets		$ 58,659,000			$ 58,659,000	84,881,000
Cash equivalent maturity period (in months)					3 months
Provision for doubtful accounts					$ (22,000)	63,000
Amortization of deferred lease costs					6,300,000	5,500,000	5,200,000
Amortization of lease incentives					700,000	2,100,000	3,300,000
Deferred financing costs		$ 2,084,000			$ 2,084,000	$ 2,692,000
Number of series of bonds | bond		2			2	2
Common stock, par value (in dollars per share) | $ / shares		$ 0.01			$ 0.01	$ 0.01
Preferred stock shares authorized | shares		100,000,000.0			100,000,000.0
Preferred stock par value (in dollars per share) | $ / shares		$ 0.01			$ 0.01
Minimum requirement to distribute taxable income (percent)		90.00%			90.00%
Estimated gain to be reclassified from AOCI as reduction to interest expense over next 12 months		$ 900,000			$ 900,000
Limit on investments in taxable real estate investment trusts (percent)		20.00%			20.00%
Intangible below market ground lease assets
Property, Plant and Equipment [Line Items]
Gross intangible assets						$ 32,600,000
Accumulated depreciation of lease assets						2,600,000
Term Loans
Property, Plant and Equipment [Line Items]
Deferred financing costs		$ 2,084,000			$ 2,084,000	2,692,000
Unsecured Debt
Property, Plant and Equipment [Line Items]
Deferred financing costs		$ 3,552,000			$ 3,552,000	$ 4,158,000
Number of series of bonds | bond		2			2	2
Unsecured Debt | 2026 Bonds Payable
Property, Plant and Equipment [Line Items]
Debt face amount		$ 350,000,000			$ 350,000,000	$ 350,000,000
Debt term					10 years	10 years
Stated interest rate		3.65%			3.65%	3.65%
Discount rate of face value of issued debt instrument (percent)		99.626%			99.626%	99.626%
Unsecured Debt | 2025 Bonds Payable
Property, Plant and Equipment [Line Items]
Debt face amount		$ 350,000,000.0			$ 350,000,000.0	$ 350,000,000.0
Debt term					10 years	10 years
Stated interest rate		4.15%			4.15%	4.15%
Discount rate of face value of issued debt instrument (percent)		99.859%			99.859%	99.859%
Common Stock | Stock Repurchase Program
Property, Plant and Equipment [Line Items]
Common stock, par value (in dollars per share) | $ / shares		$ 0.01			$ 0.01
Stock repurchase program, amount available for repurchase		$ 166,500,000			$ 166,500,000
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Pasedena Corporate Park
Property, Plant and Equipment [Line Items]
Impairment loss on real estate assets		20,600,000
Disposal Group, Disposed of by Sale, Not Discontinued Operations | 222 East 41st Street
Property, Plant and Equipment [Line Items]
Impairment loss on real estate assets				$ 30,800,000
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Lindbergh Center
Property, Plant and Equipment [Line Items]
Impairment loss on real estate assets	$ 23,400,000		23,400,000
Level 1 | Disposal Group, Disposed of by Sale, Not Discontinued Operations | Pasedena Corporate Park
Property, Plant and Equipment [Line Items]
Real estate investment, fair value		$ 74,500,000			74,500,000
Level 1 | Disposal Group, Disposed of by Sale, Not Discontinued Operations | 222 East 41st Street
Property, Plant and Equipment [Line Items]
Real estate investment, fair value								$ 284,600,000
Level 1 | Disposal Group, Disposed of by Sale, Not Discontinued Operations | Lindbergh Center
Property, Plant and Equipment [Line Items]
Real estate investment, fair value			$ 181,000,000.0
Corporate Joint Venture
Property, Plant and Equipment [Line Items]
Interest capitalized to investments in unconsolidated joint ventures					1,300,000	$ 200,000
Interest Expense
Property, Plant and Equipment [Line Items]
Amortization of deferred financing costs					$ 2,400,000	$ 2,900,000	$ 2,800,000

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Summary of Significant Accounting Policies - Schedule of Net Below-Market Lease Asset Amortization (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Intangible Lease Assets
Intangible lease assets, net	$ 61,025	$ 98,540
Intangible lease origination costs, net	27,971	34,092
Intangible Below-Market In-Place Lease Liabilities
2020	5,483
2021	3,191
2022	2,910
2023	2,336
2024	1,990
Thereafter	5,929
Below market lease, net	$ 21,839	21,081
Weighted - average amortization period (in years)	5 years 3 months 18 days
Above-Market In-Place Lease Assets
Intangible Lease Assets
2020	$ 172
2021	172
2022	172
2023	172
2024	172
Thereafter	419
Intangible lease assets, net	$ 1,279	2,114
Weighted - average amortization period (in years)	6 years 7 months 6 days
Absorption Period Costs
Intangible Lease Assets
2020	$ 12,871
2021	9,328
2022	7,959
2023	6,455
2024	5,594
Thereafter	17,539
Intangible lease assets, net	$ 59,746	66,448
Weighted - average amortization period (in years)	5 years
Intangible Lease Origination Costs
Intangible Lease Assets
2020	$ 5,866
2021	4,516
2022	3,429
2023	2,903
2024	2,586
Thereafter	8,671
Intangible lease origination costs, net	$ 27,971	$ 34,092
Weighted - average amortization period (in years)	4 years 10 months 24 days

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Real Estate Transactions - Purchase Price Allocation (Details) - USD ($) $ in Thousands	Dec. 09, 2019	Dec. 02, 2019	Nov. 28, 2017	Oct. 11, 2017
Business Acquisition [Line Items]
Total purchase price	$ 246,308	$ 206,645
201 California Street
Business Acquisition [Line Items]
Land	77,833
Building and improvements	157,513
Intangible below market lease liability	$ (8,064)
Ownership percentage	100.00%
101 Franklin Street
Business Acquisition [Line Items]
Land		57,145
Building and improvements		149,500
Intangible below market lease liability		$ 0
Ownership percentage		92.50%
149 Madison Avenue
Business Acquisition [Line Items]
Land			$ 59,112
Building and improvements			28,989
Intangible below market lease liability			0
Total purchase price			$ 88,101
Ownership percentage			100.00%
249 West 17th Street
Business Acquisition [Line Items]
Land				$ 113,149
Building and improvements				194,109
Intangible below market lease liability				(7,131)
Total purchase price				340,597
218 West 18th Street
Business Acquisition [Line Items]
Land				43,836
Building and improvements				126,957
Intangible below market lease liability				(11,757)
Total purchase price				175,324
Intangible lease assets | 201 California Street
Business Acquisition [Line Items]
Intangible lease assets	$ 13,241
Intangible lease assets | 101 Franklin Street
Business Acquisition [Line Items]
Intangible lease assets		$ 0
Intangible lease assets | 149 Madison Avenue
Business Acquisition [Line Items]
Intangible lease assets			$ 0
Intangible lease assets | 249 West 17th Street
Business Acquisition [Line Items]
Intangible lease assets				27,408
Intangible lease assets | 218 West 18th Street
Business Acquisition [Line Items]
Intangible lease assets				12,120
Intangible lease origination costs | 201 California Street
Business Acquisition [Line Items]
Intangible lease assets	$ 5,785
Intangible lease origination costs | 101 Franklin Street
Business Acquisition [Line Items]
Intangible lease assets		$ 0
Intangible lease origination costs | 149 Madison Avenue
Business Acquisition [Line Items]
Intangible lease assets			$ 0
Intangible lease origination costs | 249 West 17th Street
Business Acquisition [Line Items]
Intangible lease assets				13,062
Intangible lease origination costs | 218 West 18th Street
Business Acquisition [Line Items]
Intangible lease assets				$ 4,168

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Consolidated Statements of Equity (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Common Stock
Distributions to common stockholders (in dollars per share)	$ 0.81	$ 0.80	$ 0.80

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Leases - Schedule of Future Minimum Lease Payments To Be Made (Details) $ in Thousands	Dec. 31, 2019 USD ($)
Leases [Abstract]
2020	$ 728
2021	760
2022	793
2023	67
2024	0
Thereafter	0
Total lease payments	2,348
Less: interest expense	(162)
Operating lease liabilities	$ 2,186
Weighted-average remaining lease term (years)	3 years 1 month 6 days
Weighted-average discount rate (as a percent)	4.50%

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Stockholders' Equity and Partner's Capital - Summary of Shares Granted to Independent Directors (Details) - Long Term Incentive Plan - Director - $ / shares	May 14, 2019	May 14, 2018	Nov. 27, 2017	May 02, 2017	Jan. 03, 2017
May 14, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares	28,000
Weighted-Average Grant-Date Fair Value (in dollars per share)	$ 22.13
May 14, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares		31,743
Weighted-Average Grant-Date Fair Value (in dollars per share)		$ 22.20
January 3, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares					8,279
Weighted-Average Grant-Date Fair Value (in dollars per share)					$ 21.58
May 2, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares				33,581
Weighted-Average Grant-Date Fair Value (in dollars per share)				$ 22.57
November 27, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares			1,596
Weighted-Average Grant-Date Fair Value (in dollars per share)			$ 23.07

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Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Building and improvements, accumulated depreciation	$ 281,248	$ 403,355
Intangible lease assets, accumulated amortization	58,659	84,881
Depreciation and amortization	80,543
Allowance for doubtful accounts		4
Intangible lease origination costs, accumulated amortization	33,731	65,348
Accumulated amortization for deferred lease cost	16,732	27,735
Held for sale accumulated amortization	10,222
Deferred financing costs	2,084	2,692
Bonds payable, discount	1,124	1,304
Intangible lease liabilities, accumulated amortization	$ 15,127	$ 21,766
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	225,000,000	225,000,000
Common stock, shares issued	115,280,597	116,698,033
Common stock, shares outstanding	115,280,597	116,698,033
Term Loans
Deferred financing costs	$ 2,084	$ 2,692
Unsecured Debt
Deferred financing costs	3,552	4,158
Columbia Property Trust Operating Partnership, L.P.
Building and improvements, accumulated depreciation	252,034	324,426
Intangible lease assets, accumulated amortization	58,658	84,881
Depreciation and amortization	22,464
Allowance for doubtful accounts		4
Intangible lease origination costs, accumulated amortization	33,731	65,348
Accumulated amortization for deferred lease cost	14,272	19,342
Held for sale accumulated amortization	3,971
Bonds payable, discount	1,124	1,304
Intangible lease liabilities, accumulated amortization	15,127	21,766
Columbia Property Trust Operating Partnership, L.P. | Term Loans
Deferred financing costs	2,084	2,692
Columbia Property Trust Operating Partnership, L.P. | Unsecured Debt
Deferred financing costs	$ 3,552	$ 4,158

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Bonds Payable (Details)	12 Months Ended
	Dec. 31, 2019 USD ($) bond	Dec. 31, 2018 USD ($) bond
Debt Instrument [Line Items]
Number of series of bonds | bond	2	2
Bonds payable, net	$ 698,900,000	$ 698,700,000
Unsecured Debt
Debt Instrument [Line Items]
Number of series of bonds | bond	2	2
Unsecured Debt | 2026 Bonds Payable
Debt Instrument [Line Items]
Debt face amount	$ 350,000,000	$ 350,000,000
Debt term	10 years	10 years
Stated interest rate	3.65%	3.65%
Discount rate of face value of issued debt instrument (percent)	99.626%	99.626%
Unsecured Debt | 2025 Bonds Payable
Debt Instrument [Line Items]
Debt face amount	$ 350,000,000.0	$ 350,000,000.0
Debt term	10 years	10 years
Stated interest rate	4.15%	4.15%
Discount rate of face value of issued debt instrument (percent)	99.859%	99.859%
Unsecured Debt | 2018 Bonds Payable
Debt Instrument [Line Items]
Debt face amount	$ 250,000,000.0
Unsecured Debt | 2026 and 2025 Bonds Payable
Debt Instrument [Line Items]
Interest payments	$ 27,300,000	$ 27,300,000
Restrictive covenant ratio of debt to total asset	60.00%
Restrictive covenant of consolidated income to annual debt service charges	1.50
Fair Value, Inputs, Level 2 | Unsecured Debt | 2026 and 2025 Bonds Payable
Debt Instrument [Line Items]
Estimated fair value of debt instrument	$ 734,400,000	$ 685,000,000.0
Maximum | Unsecured Debt | 2026 and 2025 Bonds Payable
Debt Instrument [Line Items]
Restrictive covenant ratio of secured debt to total asset	40.00%
Minimum | Unsecured Debt | 2026 and 2025 Bonds Payable
Debt Instrument [Line Items]
Ratio of unencumbered asset value to total unsecured debt	150.00%

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Unconsolidated Joint Ventures (Property and Asset Management Fees) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Schedule of Equity Method Investments [Line Items]
Asset and property management fee income	$ 7,500	$ 7,400	$ 3,800
Corporate Joint Venture
Schedule of Equity Method Investments [Line Items]
Asset and property management fee income	7,544	7,384	3,782
Corporate Joint Venture | Market Square Joint Venture
Schedule of Equity Method Investments [Line Items]
Asset and property management fee income	2,256	2,156	1,998
Corporate Joint Venture | University Circle Joint Venture
Schedule of Equity Method Investments [Line Items]
Asset and property management fee income	2,313	2,283	1,000
Corporate Joint Venture | 333 Market Street Joint Venture
Schedule of Equity Method Investments [Line Items]
Asset and property management fee income	819	784	367
Corporate Joint Venture | 1800 M Street Joint Venture
Schedule of Equity Method Investments [Line Items]
Asset and property management fee income	$ 2,156	$ 2,161	$ 417

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Unconsolidated Joint Ventures - Summary of Financial Information for the Joint Ventures (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Oct. 03, 2018	Oct. 11, 2017	Jul. 06, 2017
Schedule of Equity Method Investments [Line Items]
Interest capitalized	$ 5,100	$ 4,000	$ 300
Difference between carrying amount and underlying equity	279,200	282,000
Corporate Joint Venture
Schedule of Equity Method Investments [Line Items]
Carrying Value of Investment	$ 1,054,460	1,071,353
Corporate Joint Venture | Market Square Joint Venture
Schedule of Equity Method Investments [Line Items]
Ownership Interest	51.00%
Carrying Value of Investment	$ 135,557	134,250
Corporate Joint Venture | University Circle Joint Venture
Schedule of Equity Method Investments [Line Items]
Ownership Interest	55.00%
Carrying Value of Investment	$ 283,633	292,951
Corporate Joint Venture | 333 Market Street Joint Venture
Schedule of Equity Method Investments [Line Items]
Ownership Interest	55.00%
Carrying Value of Investment	$ 269,638	273,783
Corporate Joint Venture | 114 Fifth Avenue
Schedule of Equity Method Investments [Line Items]
Ownership Interest	49.50%					49.50%
Carrying Value of Investment	$ 87,750	99,283
Corporate Joint Venture | 1800 M Street Joint Venture
Schedule of Equity Method Investments [Line Items]
Ownership Interest	55.00%				55.00%
Carrying Value of Investment	$ 233,196	237,333
Corporate Joint Venture | 799 Broadway Joint Venture
Schedule of Equity Method Investments [Line Items]
Ownership Interest	49.70%			49.70%
Carrying Value of Investment	$ 44,686	33,753
Interest capitalized	$ 1,300	$ 200

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Schedule III - Real Estate Assets and Accumulated Depreciation and Amortization (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Real Estate and Accumulated Depreciation [Line Items]
Gross Amount at Which Carried at December 31, 2019, Total	$ 3,336,448	$ 3,345,301	$ 3,612,294	$ 4,243,531
Aggregate cost of land and buildings and improvements for federal income tax purposes	$ 3,475,000
Building Improvements | Minimum
Real Estate and Accumulated Depreciation [Line Items]
Real estate and accumulated depreciation, life used for depreciation	5 years
Building Improvements | Maximum
Real Estate and Accumulated Depreciation [Line Items]
Real estate and accumulated depreciation, life used for depreciation	25 years
Office Lease | Minimum
Real Estate and Accumulated Depreciation [Line Items]
Real estate and accumulated depreciation, life used for depreciation	40 years
Consolidated Properties
Real Estate and Accumulated Depreciation [Line Items]
Initial Costs, Land	$ 937,754
Initial Costs, Building and Improvements	2,234,203
Initial Costs, Total	3,171,957
Costs Capitalized Subsequent to Acquisition	164,491
Gross Amount at Which Carried at December 31, 2019, Land	927,468
Gross Amount at Which Carried at December 31, 2019, Buildings and Improvements	2,408,980
Gross Amount at Which Carried at December 31, 2019, Total	3,336,448
Accumulated Depreciation and Amortization	$ 418,979
Consolidated Properties | 80 M Street
Real Estate and Accumulated Depreciation [Line Items]
Ownership percentage	100.00%
Encumbrances	$ 0
Initial Costs, Land	26,248
Initial Costs, Building and Improvements	76,269
Initial Costs, Total	102,517
Costs Capitalized Subsequent to Acquisition	6,732
Gross Amount at Which Carried at December 31, 2019, Land	26,806
Gross Amount at Which Carried at December 31, 2019, Buildings and Improvements	82,443
Gross Amount at Which Carried at December 31, 2019, Total	109,249
Accumulated Depreciation and Amortization	$ 29,214
Consolidated Properties | 95 Columbus
Real Estate and Accumulated Depreciation [Line Items]
Ownership percentage	100.00%
Encumbrances	$ 0
Initial Costs, Land	29,061
Initial Costs, Building and Improvements	141,544
Initial Costs, Total	170,605
Costs Capitalized Subsequent to Acquisition	13,137
Gross Amount at Which Carried at December 31, 2019, Land	29,712
Gross Amount at Which Carried at December 31, 2019, Buildings and Improvements	154,030
Gross Amount at Which Carried at December 31, 2019, Total	183,742
Accumulated Depreciation and Amortization	$ 72,086
Consolidated Properties | Pasadena Corporate Park
Real Estate and Accumulated Depreciation [Line Items]
Ownership percentage	100.00%
Encumbrances	$ 0
Initial Costs, Land	53,099
Initial Costs, Building and Improvements	59,630
Initial Costs, Total	112,729
Costs Capitalized Subsequent to Acquisition	(20,992)
Gross Amount at Which Carried at December 31, 2019, Land	41,604
Gross Amount at Which Carried at December 31, 2019, Buildings and Improvements	50,133
Gross Amount at Which Carried at December 31, 2019, Total	91,737
Accumulated Depreciation and Amortization	$ 22,463
Consolidated Properties | Cranberry Woods Drive
Real Estate and Accumulated Depreciation [Line Items]
Ownership percentage	100.00%
Encumbrances	$ 0
Initial Costs, Land	15,512
Initial Costs, Building and Improvements	173,062
Initial Costs, Total	188,574
Costs Capitalized Subsequent to Acquisition	15,187
Gross Amount at Which Carried at December 31, 2019, Land	15,512
Gross Amount at Which Carried at December 31, 2019, Buildings and Improvements	188,249
Gross Amount at Which Carried at December 31, 2019, Total	203,761
Accumulated Depreciation and Amortization	$ 58,079
Consolidated Properties | 221 Main Street
Real Estate and Accumulated Depreciation [Line Items]
Ownership percentage	100.00%
Encumbrances	$ 0
Initial Costs, Land	60,509
Initial Costs, Building and Improvements	174,629
Initial Costs, Total	235,138
Costs Capitalized Subsequent to Acquisition	19,871
Gross Amount at Which Carried at December 31, 2019, Land	60,509
Gross Amount at Which Carried at December 31, 2019, Buildings and Improvements	194,500
Gross Amount at Which Carried at December 31, 2019, Total	255,009
Accumulated Depreciation and Amortization	$ 41,491
Consolidated Properties | 650 California Street
Real Estate and Accumulated Depreciation [Line Items]
Ownership percentage	100.00%
Encumbrances	$ 0
Initial Costs, Land	75,384
Initial Costs, Building and Improvements	240,441
Initial Costs, Total	315,825
Costs Capitalized Subsequent to Acquisition	27,757
Gross Amount at Which Carried at December 31, 2019, Land	75,384
Gross Amount at Which Carried at December 31, 2019, Buildings and Improvements	268,198
Gross Amount at Which Carried at December 31, 2019, Total	343,582
Accumulated Depreciation and Amortization	$ 49,732
Consolidated Properties | 315 Park Avenue South
Real Estate and Accumulated Depreciation [Line Items]
Ownership percentage	100.00%
Encumbrances	$ 0
Initial Costs, Land	119,633
Initial Costs, Building and Improvements	249,510
Initial Costs, Total	369,143
Costs Capitalized Subsequent to Acquisition	35,718
Gross Amount at Which Carried at December 31, 2019, Land	119,633
Gross Amount at Which Carried at December 31, 2019, Buildings and Improvements	285,228
Gross Amount at Which Carried at December 31, 2019, Total	404,861
Accumulated Depreciation and Amortization	$ 38,039
Consolidated Properties | 116 Huntington Avenue
Real Estate and Accumulated Depreciation [Line Items]
Ownership percentage	100.00%
Encumbrances	$ 0
Initial Costs, Land	0
Initial Costs, Building and Improvements	116,290
Initial Costs, Total	116,290
Costs Capitalized Subsequent to Acquisition	26,670
Gross Amount at Which Carried at December 31, 2019, Land	0
Gross Amount at Which Carried at December 31, 2019, Buildings and Improvements	142,960
Gross Amount at Which Carried at December 31, 2019, Total	142,960
Accumulated Depreciation and Amortization	$ 25,824
Consolidated Properties | 229 West 43rd Street
Real Estate and Accumulated Depreciation [Line Items]
Ownership percentage	100.00%
Encumbrances	$ 0
Initial Costs, Land	207,233
Initial Costs, Building and Improvements	292,991
Initial Costs, Total	500,224
Costs Capitalized Subsequent to Acquisition	2,226
Gross Amount at Which Carried at December 31, 2019, Land	207,233
Gross Amount at Which Carried at December 31, 2019, Buildings and Improvements	295,217
Gross Amount at Which Carried at December 31, 2019, Total	502,450
Accumulated Depreciation and Amortization	$ 47,597
Consolidated Properties | 249 West 17th Street
Real Estate and Accumulated Depreciation [Line Items]
Ownership percentage	100.00%
Encumbrances	$ 0
Initial Costs, Land	113,149
Initial Costs, Building and Improvements	221,517
Initial Costs, Total	334,666
Costs Capitalized Subsequent to Acquisition	4,354
Gross Amount at Which Carried at December 31, 2019, Land	113,149
Gross Amount at Which Carried at December 31, 2019, Buildings and Improvements	225,871
Gross Amount at Which Carried at December 31, 2019, Total	339,020
Accumulated Depreciation and Amortization	$ 18,867
Consolidated Properties | 218 West 18th Street
Real Estate and Accumulated Depreciation [Line Items]
Ownership percentage	100.00%
Encumbrances	$ 0
Initial Costs, Land	43,836
Initial Costs, Building and Improvements	139,077
Initial Costs, Total	182,913
Costs Capitalized Subsequent to Acquisition	5,716
Gross Amount at Which Carried at December 31, 2019, Land	43,836
Gross Amount at Which Carried at December 31, 2019, Buildings and Improvements	144,793
Gross Amount at Which Carried at December 31, 2019, Total	188,629
Accumulated Depreciation and Amortization	$ 14,868
Consolidated Properties | 149 Madison Avenue
Real Estate and Accumulated Depreciation [Line Items]
Ownership percentage	100.00%
Encumbrances	$ 0
Initial Costs, Land	59,112
Initial Costs, Building and Improvements	28,989
Initial Costs, Total	88,101
Costs Capitalized Subsequent to Acquisition	22,408
Gross Amount at Which Carried at December 31, 2019, Land	59,112
Gross Amount at Which Carried at December 31, 2019, Buildings and Improvements	51,397
Gross Amount at Which Carried at December 31, 2019, Total	110,509
Accumulated Depreciation and Amortization	$ 0
Consolidated Properties | 101 Franklin Street
Real Estate and Accumulated Depreciation [Line Items]
Ownership percentage	92.50%
Encumbrances	$ 0
Initial Costs, Land	57,145
Initial Costs, Building and Improvements	149,500
Initial Costs, Total	206,645
Costs Capitalized Subsequent to Acquisition	2,373
Gross Amount at Which Carried at December 31, 2019, Land	57,145
Gross Amount at Which Carried at December 31, 2019, Buildings and Improvements	151,873
Gross Amount at Which Carried at December 31, 2019, Total	209,018
Accumulated Depreciation and Amortization	$ 0
Consolidated Properties | 201 California Street
Real Estate and Accumulated Depreciation [Line Items]
Ownership percentage	100.00%
Encumbrances	$ 0
Initial Costs, Land	77,833
Initial Costs, Building and Improvements	170,754
Initial Costs, Total	248,587
Costs Capitalized Subsequent to Acquisition	3,334
Gross Amount at Which Carried at December 31, 2019, Land	77,833
Gross Amount at Which Carried at December 31, 2019, Buildings and Improvements	174,088
Gross Amount at Which Carried at December 31, 2019, Total	251,921
Accumulated Depreciation and Amortization	$ 719
Consolidated Properties | Minimum | 80 M Street
Real Estate and Accumulated Depreciation [Line Items]
Real estate and accumulated depreciation, life used for depreciation	0 years
Consolidated Properties | Minimum | 95 Columbus
Real Estate and Accumulated Depreciation [Line Items]
Real estate and accumulated depreciation, life used for depreciation	0 years
Consolidated Properties | Minimum | Pasadena Corporate Park
Real Estate and Accumulated Depreciation [Line Items]
Real estate and accumulated depreciation, life used for depreciation	0 years
Consolidated Properties | Minimum | Cranberry Woods Drive
Real Estate and Accumulated Depreciation [Line Items]
Real estate and accumulated depreciation, life used for depreciation	0 years
Consolidated Properties | Minimum | 221 Main Street
Real Estate and Accumulated Depreciation [Line Items]
Real estate and accumulated depreciation, life used for depreciation	0 years
Consolidated Properties | Minimum | 650 California Street
Real Estate and Accumulated Depreciation [Line Items]
Real estate and accumulated depreciation, life used for depreciation	0 years
Consolidated Properties | Minimum | 315 Park Avenue South
Real Estate and Accumulated Depreciation [Line Items]
Real estate and accumulated depreciation, life used for depreciation	0 years
Consolidated Properties | Minimum | 116 Huntington Avenue
Real Estate and Accumulated Depreciation [Line Items]
Real estate and accumulated depreciation, life used for depreciation	0 years
Consolidated Properties | Minimum | 229 West 43rd Street
Real Estate and Accumulated Depreciation [Line Items]
Real estate and accumulated depreciation, life used for depreciation	0 years
Consolidated Properties | Minimum | 249 West 17th Street
Real Estate and Accumulated Depreciation [Line Items]
Real estate and accumulated depreciation, life used for depreciation	0 years
Consolidated Properties | Minimum | 218 West 18th Street
Real Estate and Accumulated Depreciation [Line Items]
Real estate and accumulated depreciation, life used for depreciation	0 years
Consolidated Properties | Minimum | 149 Madison Avenue
Real Estate and Accumulated Depreciation [Line Items]
Real estate and accumulated depreciation, life used for depreciation	0 years
Consolidated Properties | Minimum | 101 Franklin Street
Real Estate and Accumulated Depreciation [Line Items]
Real estate and accumulated depreciation, life used for depreciation	0 years
Consolidated Properties | Minimum | 201 California Street
Real Estate and Accumulated Depreciation [Line Items]
Real estate and accumulated depreciation, life used for depreciation	0 years
Consolidated Properties | Maximum | 80 M Street
Real Estate and Accumulated Depreciation [Line Items]
Real estate and accumulated depreciation, life used for depreciation	40 years
Consolidated Properties | Maximum | 95 Columbus
Real Estate and Accumulated Depreciation [Line Items]
Real estate and accumulated depreciation, life used for depreciation	40 years
Consolidated Properties | Maximum | Pasadena Corporate Park
Real Estate and Accumulated Depreciation [Line Items]
Real estate and accumulated depreciation, life used for depreciation	40 years
Consolidated Properties | Maximum | Cranberry Woods Drive
Real Estate and Accumulated Depreciation [Line Items]
Real estate and accumulated depreciation, life used for depreciation	40 years
Consolidated Properties | Maximum | 221 Main Street
Real Estate and Accumulated Depreciation [Line Items]
Real estate and accumulated depreciation, life used for depreciation	40 years
Consolidated Properties | Maximum | 650 California Street
Real Estate and Accumulated Depreciation [Line Items]
Real estate and accumulated depreciation, life used for depreciation	40 years
Consolidated Properties | Maximum | 315 Park Avenue South
Real Estate and Accumulated Depreciation [Line Items]
Real estate and accumulated depreciation, life used for depreciation	40 years
Consolidated Properties | Maximum | 116 Huntington Avenue
Real Estate and Accumulated Depreciation [Line Items]
Real estate and accumulated depreciation, life used for depreciation	40 years
Consolidated Properties | Maximum | 229 West 43rd Street
Real Estate and Accumulated Depreciation [Line Items]
Real estate and accumulated depreciation, life used for depreciation	40 years
Consolidated Properties | Maximum | 249 West 17th Street
Real Estate and Accumulated Depreciation [Line Items]
Real estate and accumulated depreciation, life used for depreciation	40 years
Consolidated Properties | Maximum | 218 West 18th Street
Real Estate and Accumulated Depreciation [Line Items]
Real estate and accumulated depreciation, life used for depreciation	40 years
Consolidated Properties | Maximum | 149 Madison Avenue
Real Estate and Accumulated Depreciation [Line Items]
Real estate and accumulated depreciation, life used for depreciation	40 years
Consolidated Properties | Maximum | 101 Franklin Street
Real Estate and Accumulated Depreciation [Line Items]
Real estate and accumulated depreciation, life used for depreciation	40 years
Consolidated Properties | Maximum | 201 California Street
Real Estate and Accumulated Depreciation [Line Items]
Real estate and accumulated depreciation, life used for depreciation	40 years
Unconsolidated Properties
Real Estate and Accumulated Depreciation [Line Items]
Initial Costs, Land	$ 566,331
Initial Costs, Building and Improvements	1,682,797
Initial Costs, Total	2,249,128
Costs Capitalized Subsequent to Acquisition	(69,136)
Gross Amount at Which Carried at December 31, 2019, Land	566,594
Gross Amount at Which Carried at December 31, 2019, Buildings and Improvements	1,613,398
Gross Amount at Which Carried at December 31, 2019, Total	2,179,992
Accumulated Depreciation and Amortization	179,073
Initial cost of land, buildings and improvements net of encumbrances	$ 1,834,000
Unconsolidated Properties | Market Square
Real Estate and Accumulated Depreciation [Line Items]
Ownership percentage	51.00%
Encumbrances	$ 325,000
Initial Costs, Land	152,629
Initial Costs, Building and Improvements	450,757
Initial Costs, Total	603,386
Costs Capitalized Subsequent to Acquisition	(15,552)
Gross Amount at Which Carried at December 31, 2019, Land	152,629
Gross Amount at Which Carried at December 31, 2019, Buildings and Improvements	435,205
Gross Amount at Which Carried at December 31, 2019, Total	587,834
Accumulated Depreciation and Amortization	$ 59,629
Unconsolidated Properties | University Circle
Real Estate and Accumulated Depreciation [Line Items]
Ownership percentage	55.00%
Encumbrances	$ 0
Initial Costs, Land	27,493
Initial Costs, Building and Improvements	278,288
Initial Costs, Total	305,781
Costs Capitalized Subsequent to Acquisition	(96,941)
Gross Amount at Which Carried at December 31, 2019, Land	27,756
Gross Amount at Which Carried at December 31, 2019, Buildings and Improvements	181,084
Gross Amount at Which Carried at December 31, 2019, Total	208,840
Accumulated Depreciation and Amortization	$ 13,591
Unconsolidated Properties | 333 Market Street
Real Estate and Accumulated Depreciation [Line Items]
Ownership percentage	55.00%
Encumbrances	$ 0
Initial Costs, Land	114,483
Initial Costs, Building and Improvements	292,840
Initial Costs, Total	407,323
Costs Capitalized Subsequent to Acquisition	(41,230)
Gross Amount at Which Carried at December 31, 2019, Land	114,483
Gross Amount at Which Carried at December 31, 2019, Buildings and Improvements	251,610
Gross Amount at Which Carried at December 31, 2019, Total	366,093
Accumulated Depreciation and Amortization	$ 20,680
Unconsolidated Properties | 114 Fifth Avenue
Real Estate and Accumulated Depreciation [Line Items]
Ownership percentage	49.50%
Encumbrances	$ 0
Initial Costs, Land	0
Initial Costs, Building and Improvements	383,694
Initial Costs, Total	383,694
Costs Capitalized Subsequent to Acquisition	2,301
Gross Amount at Which Carried at December 31, 2019, Land	0
Gross Amount at Which Carried at December 31, 2019, Buildings and Improvements	385,995
Gross Amount at Which Carried at December 31, 2019, Total	385,995
Accumulated Depreciation and Amortization	$ 52,714
Unconsolidated Properties | 1800 M Street
Real Estate and Accumulated Depreciation [Line Items]
Ownership percentage	55.00%
Encumbrances	$ 0
Initial Costs, Land	125,735
Initial Costs, Building and Improvements	272,353
Initial Costs, Total	398,088
Costs Capitalized Subsequent to Acquisition	35,285
Gross Amount at Which Carried at December 31, 2019, Land	125,735
Gross Amount at Which Carried at December 31, 2019, Buildings and Improvements	307,638
Gross Amount at Which Carried at December 31, 2019, Total	433,373
Accumulated Depreciation and Amortization	$ 32,459
Unconsolidated Properties | 799 Broadway
Real Estate and Accumulated Depreciation [Line Items]
Ownership percentage	49.70%
Encumbrances	$ 113,200
Initial Costs, Land	145,991
Initial Costs, Building and Improvements	4,865
Initial Costs, Total	150,856
Costs Capitalized Subsequent to Acquisition	47,001
Gross Amount at Which Carried at December 31, 2019, Land	145,991
Gross Amount at Which Carried at December 31, 2019, Buildings and Improvements	51,866
Gross Amount at Which Carried at December 31, 2019, Total	197,857
Accumulated Depreciation and Amortization	$ 0
Unconsolidated Properties | Minimum | Market Square
Real Estate and Accumulated Depreciation [Line Items]
Real estate and accumulated depreciation, life used for depreciation	0 years
Unconsolidated Properties | Minimum | University Circle
Real Estate and Accumulated Depreciation [Line Items]
Real estate and accumulated depreciation, life used for depreciation	0 years
Unconsolidated Properties | Minimum | 333 Market Street
Real Estate and Accumulated Depreciation [Line Items]
Real estate and accumulated depreciation, life used for depreciation	0 years
Unconsolidated Properties | Minimum | 114 Fifth Avenue
Real Estate and Accumulated Depreciation [Line Items]
Real estate and accumulated depreciation, life used for depreciation	0 years
Unconsolidated Properties | Minimum | 1800 M Street
Real Estate and Accumulated Depreciation [Line Items]
Real estate and accumulated depreciation, life used for depreciation	0 years
Unconsolidated Properties | Minimum | 799 Broadway
Real Estate and Accumulated Depreciation [Line Items]
Real estate and accumulated depreciation, life used for depreciation	0 years
Unconsolidated Properties | Maximum | Market Square
Real Estate and Accumulated Depreciation [Line Items]
Real estate and accumulated depreciation, life used for depreciation	40 years
Unconsolidated Properties | Maximum | University Circle
Real Estate and Accumulated Depreciation [Line Items]
Real estate and accumulated depreciation, life used for depreciation	40 years
Unconsolidated Properties | Maximum | 333 Market Street
Real Estate and Accumulated Depreciation [Line Items]
Real estate and accumulated depreciation, life used for depreciation	40 years
Unconsolidated Properties | Maximum | 114 Fifth Avenue
Real Estate and Accumulated Depreciation [Line Items]
Real estate and accumulated depreciation, life used for depreciation	40 years
Unconsolidated Properties | Maximum | 1800 M Street
Real Estate and Accumulated Depreciation [Line Items]
Real estate and accumulated depreciation, life used for depreciation	40 years
Unconsolidated Properties | Maximum | 799 Broadway
Real Estate and Accumulated Depreciation [Line Items]
Real estate and accumulated depreciation, life used for depreciation	40 years
Corporate | Consolidated Properties
Real Estate and Accumulated Depreciation [Line Items]
Gross Amount at Which Carried at December 31, 2019, Total	$ 3,200

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Non-Lease Revenues (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Jan. 01, 2018
Disaggregation of Revenue [Line Items]
Asset and property management fee income	$ 7.5	$ 7.4	$ 3.8
Lease override fee revenue earned	0.1	0.2
Salary and other reimbursement revenue	4.5	4.4	2.3
Miscellaneous revenue	$ 0.3	$ 0.7	$ 0.6
Difference between Revenue Guidance in Effect before and after Topic 606 | ASU 2014-09
Disaggregation of Revenue [Line Items]
Lease override fees receivable				$ 0.3

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Earnings Per Share (Schedule of Basic and Diluted EPS Computation) (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Net income	$ (21,777)	$ (20,286)	$ 47,747	$ 3,513	$ 5,003	$ 6,429	$ (3,439)	$ 1,498	$ 9,197	$ 9,491	$ 176,041
Distributions paid on unvested shares									(310)	(296)	(337)
Net income attributable to common stockholders used to calculate basic and diluted earnings per share									$ 8,887	$ 9,195	$ 175,704
Weighted-average common shares – basic									116,261	117,888	120,795
Weighted-average common shares – diluted									116,458	118,311	121,159
Previously granted LTI Plan awards, unvested
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Plus Incremental Weighted-Average Shares from Time-Vested Conversions Less Assumed Share Repurchases:									114	104	116
Future LTI Plan awards
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Plus Incremental Weighted-Average Shares from Time-Vested Conversions Less Assumed Share Repurchases:									83	319	248

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Stockholders' Equity and Partner's Capital

12 Months Ended

Dec. 31, 2019

Share-based Payment Arrangement [Abstract]

Stockholders' Equity and Partner's Capital

Stockholders' Equity and Partner's Capital

Common Stock Repurchase Program

Columbia Property Trust's board of directors authorized the repurchase of up to an aggregate of $200.0 million of its common stock, par value $0.01 per share, from September 4, 2019 through September 4, 2021 (the "2019 Stock Repurchase Program"). Under the 2019 Stock Repurchase Program, Columbia Property Trust acquired 1.6 million shares at an average price of $20.72 per share, for aggregate purchases of $33.5 million during 2019. As of December 31, 2019, $166.5 million remains available for repurchases under the 2019 Stock Repurchase Program. Common stock repurchases are charged against equity as incurred, and the repurchased shares are retired. Columbia Property Trust will continue to evaluate the purchase of shares, primarily through open market transactions, which are subject to market conditions and other factors.

Long-Term Incentive Plan

Employee Awards

Columbia Property Trust maintains a stockholder-approved, long-term incentive plan that provides for grants of stock to be made to certain employees and independent directors of Columbia Property Trust (as amended and restated, the "LTI Plan"). In May 2017, Columbia Property Trust's stockholders approved the LTI Plan, and 4.8 million shares are authorized and reserved for issuance under the LTI Plan.

Columbia Property Trust's LTI Plan includes both time-based awards and performance-based awards for all participants. Time-based awards vest ratably on each anniversary of the grant date over the next four years. Performance-based restricted stock units (the "Performance-Based RSUs") will vest 75% at the conclusion of a three-year performance period, and the remaining 25% will vest one year later. For 2019, 2018, and 2017 time-based awards, Columbia Property Trust issued 176,122, 128,486, and 139,825 shares of common stock to employees, respectively; and for 2019, 2018, and 2017 performance-based awards Columbia Property Trust granted 256,384, 176,702, and 193,219 restricted stock units, respectively. In addition, in 2017, as a result of transitioning from a one- to three-year performance period, Columbia Property Trust granted 45,076 and 92,585 one-time transitional Performance-Based RSUs, which vested at the conclusion of the one-year and two-year performance periods, respectively. Upon reaching a predefined performance threshold, the payout of the Performance-Based RSUs will range from 50% to 150% of the Performance-Based RSUs granted, depending on Columbia Property Trust's total stockholder return relative to the FTSE NAREIT Equity Office Index. All awards are expensed over the vesting period based on their estimated fair values. The fair value of time-based awards is estimated using the closing stock price on the grant date, and fair values of performance-based awards are estimated using a Monte Carlo valuation.

The 2020 LTI Plan awards are consistent with the LTI Plan awards granted in the three prior years. On January 1, 2020, Columbia Property Trust granted 165,233 shares of time-based stock awards to employees, which will vest ratably on each anniversary of the grant over the next four years. On January 1, 2020, Columbia Property Trust also granted 246,387 Performance-Based RSUs, of which 75% will vest at the conclusion of a three-year performance period, and the remaining 25% will vest one year later. Consistent with the prior-year awards, the payout of the 2020 Performance-Based RSUs will be determined based on Columbia Property Trust's total stockholder return relative to the FTSE NAREIT Equity Office Index.

Below is a summary of the employee awards issued under the LTI Plan for 2019, 2018, and 2017:

	Restricted Shares				RSUs
	Shares (in thousands)		Estimated Fair Value(1)		Units (in thousands)		Estimated Fair Value(2)
Unvested as of January 1, 2017	256		$	22.62	—		$	—
Granted	333		$	21.59	331		$	18.78
Vested	(193)		$	22.42	—		$	—
Forfeited	(7)		$	21.81	(2)		$	19.01
Unvested as of December 31, 2017	389		$	21.85	329		$	—
Granted	139		$	22.97	206		$	20.55
Vested	(153)		$	22.13	(70)		$	19.47
Forfeited	—		$	—	(11)		$	18.60
Unvested as of December 31, 2018	375		$	22.15	454		$	19.37
Granted	176		$	19.36	257		$	17.66
Vested	(165)		$	21.99	(121)		$	19.08
Forfeited	(12)		$	20.66	(6)		$	18.67
Unvested as of December 31, 2019	374	(3)	$	20.96	584	(3)	$	18.86

⁽¹⁾Reflects the weighted-average grant-date fair value using the market closing price on the date of the grant.

⁽²⁾Reflects the weighted-average grant-date fair value using a Monte Carlo valuation.

⁽³⁾As of December 31, 2019, Columbia Property Trust expects approximately 360,000 of the 374,000 unvested restricted shares to ultimately vest and approximately 562,000 of the 584,000 unvested RSUs to ultimately vest, assuming a forfeiture rate of 4%, which was determined based on peer company data, adjusted for the specifics of the LTI Plan.

Director Stock Grants

Columbia Property Trust grants equity retainers to its directors under the LTI Plan. Such grants vest immediately. Beginning in May 2017, these grants are made annually for the following year and vest immediately. Prior to this time, the independent directors' equity retainers were paid quarterly. During 2019, 2018, and 2017, Columbia Property Trust granted the following equity retainers:

Date of Grant	Shares	Grant-Date Fair Value(1)
2019 Director Grants:
May 14, 2019	28,000	$	22.13
2018 Director Grants:
May 14, 2018	31,743	$	22.20
2017 Director Grants:
January 3, 2017	8,279	$	21.58
May 2, 2017	33,581	$	22.57
November 27, 2017(2)	1,596	$	23.07

⁽¹⁾Columbia Property Trust determined the grant-date fair value using the market closing price on the date of the grant.

⁽²⁾In November 2017, a new director was appointed to the board of directors of Columbia Property Trust. The new director received a pro-rated annual equity retainer grant at appointment.

Stock-Based Compensation Expense

Columbia Property Trust incurred stock-based compensation expense related to the following events (in thousands):

	2019		2018		2017
Amortization of unvested LTI Plan awards	$	3,282	$	3,800	$	4,098
Future employee awards(1)	2,720		2,461		2,509
Issuance of shares to independent directors	620		705		973
Total stock-based compensation expense	$	6,622	$	6,966	$	7,580

⁽¹⁾Reflects amortization of LTI Plan awards for service during the current period, for which shares will be issued in future periods.

These expenses are included in general and administrative expenses – corporate in the accompanying consolidated statements of operations. There were $9.5 million and $8.6 million of unrecognized compensation costs related to unvested awards under the LTI Plan as of December 31, 2019 and December 31, 2018, respectively. This amount will be amortized over the respective vesting period, ranging from one year to four years at the time of grant.

Independent Director Stock Option Plan

Columbia Property Trust previously maintained an independent director stock option plan that provided for grants of stock to be made to independent directors of Columbia Property Trust (the "Director Plan"). A total of 25,000 shares were authorized and reserved for issuance under the Director Plan, which was suspended in April of 2008. Under the Director Plan, options were granted upon appointment to the board and on each annual meeting date. As of January 1, 2017, Columbia Property Trust had 1,375 options outstanding under this plan, all of which expired in 2017. There are no remaining options outstanding under the Director Plan.

Columbia OP Partner's Capital

Columbia Property Trust is the general partner and was the sole owner of Columbia OP for all periods presented.

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Unconsolidated Joint Ventures

12 Months Ended

Dec. 31, 2019

Equity Method Investments and Joint Ventures [Abstract]

Unconsolidated Joint Ventures

Joint Ventures

As of December 31, 2019 and December 31, 2018, Columbia OP owns interests in the following properties through joint ventures, which are accounted for using the equity method of accounting:

		Geographic Market	Ownership Interest		Carrying Value of Investment(1)
Joint Venture	Property Name				December 31, 2019			December 31, 2018
Market Square Joint Venture	Market Square	Washington, D.C.	51.0	%	$	135,557		$	134,250
University Circle Joint Venture	University Circle	San Francisco	55.0	%	283,633			292,951
333 Market Street Joint Venture	333 Market Street	San Francisco	55.0	%	269,638			273,783
114 Fifth Avenue Joint Venture	114 Fifth Avenue	New York	49.5	%	87,750			99,283
1800 M Street Joint Venture	1800 M Street	Washington, D.C.	55.0	%	233,196			237,333
799 Broadway Joint Venture(2)	799 Broadway	New York	49.7	%	44,686		(4)	33,753
					$	1,054,460		$	1,071,353

⁽¹⁾Includes basis differences. Columbia Property Trust's investments in unconsolidated joint ventures were greater than the historical costs recorded at the underlying joint venture level by $279.2 million and $282.0 million as of December 31, 2019 and December 31, 2018, respectively. Such basis differences result from the timing of each partner's joint venture interest acquisition; and formation costs incurred by Columbia Property Trust. Basis differences are amortized to income (loss) from unconsolidated joint ventures over the lives of the underlying assets or liabilities.

⁽²⁾Columbia Property Trust capitalized interest of $1.3 million and $0.2 million on its investment in the 799 Broadway Joint Venture in 2019 and 2018, respectively.

Columbia Property Trust has determined that none of its unconsolidated joint ventures are variable interest entities. However, Columbia Property Trust and its unconsolidated joint venture partners have substantive participation rights in the joint ventures, including management selection and termination, and the approval of operating and capital decisions. As such, Columbia Property Trust uses the equity method of accounting to record its investment in these joint ventures. Under the equity method, the investment in the joint ventures is recorded at cost and adjusted for cash contributions and distributions, and allocations of income or loss.

Columbia Property Trust evaluates the recoverability of its investments in unconsolidated joint ventures in accordance with accounting standards for equity investments by first reviewing the investment for any indicators of impairment. If indicators are present, Columbia Property Trust estimates the fair value of the investment. If the carrying value of the investment is greater than the estimated fair value, management makes an assessment of whether the impairment is "other-than-temporary." In making this assessment, management considers the following: (1) the length of time and the extent to which fair value has been less than cost, and (2) Columbia Property Trust's intent and ability to retain its interest long enough for a recovery in market value. Based on the assessment as described above, Columbia Property Trust has determined that none of its investments in joint ventures are other-than-temporarily impaired as of December 31, 2019.

Condensed Combined Financial Information

Summarized balance sheet information for each of the unconsolidated joint ventures is as follows (in thousands):

	Total Assets				Total Debt					Total Equity(1)
	December 31, 2019		December 31, 2018		December 31, 2019			December 31, 2018		December 31, 2019		December 31, 2018
Market Square Joint Venture	$	582,747	$	582,176	$	324,815	(2)	$	324,762	$	241,719	$	241,581
University Circle Joint Venture	216,546		224,746		—			—		212,656		219,390
333 Market Street Joint Venture	367,652		375,884		—			—		352,385		360,915
114 Fifth Avenue Joint Venture	485,442		377,970		—			—		127,554		149,243
1800 M Street Joint Venture	437,439		447,585		—			—		421,588		429,016
799 Broadway Joint Venture	201,210		168,390		109,735		(3)	95,630		85,316		67,189
	$	2,291,036	$	2,176,751	$	434,550		$	420,392	$	1,441,218	$	1,467,334

⁽¹⁾Excludes basis differences (see footnote ⁽¹⁾ to the Carrying Value of Investment table above).

⁽²⁾The Market Square Joint Venture has a mortgage note with an outstanding balance of $325.0 million as of December 31, 2019 and December 31, 2018. The Market Square mortgage note bears interest at 5.07% and matures on July 1, 2023.

⁽³⁾Reflects $113.2 million outstanding, net of $3.5 million of net unamortized deferred financing costs, on the 799 Broadway construction loan. The 799 Broadway construction loan is being used to finance a portion of the 799 Broadway development project, has total capacity of $187.0 million, and bears interest at LIBOR, capped at 4.00%, plus a spread of 425 basis points (the "Construction Loan"). A portion of the monthly interest payments accrue into the balance of the loan. The Construction Loan matures on October 9, 2021, with two one-year extension options. For a discussion of Columbia Property Trust's equity guaranty related to the Construction Loan, see Note 7, Commitments and Contingencies.

Summarized income statement information for the unconsolidated joint ventures for the years ended December 31, 2019, 2018, and 2017 is as follows (in thousands):

	Total Revenues						Net Income (Loss)						Columbia Property Trust's Share of Net Income (Loss)(1)
	2019		2018		2017		2019		2018		2017		2019		2018		2017
Market Square Joint Venture	$	47,737	$	44,815	$	41,749	$	(11,515)	$	(12,304)	$	(15,192)	$	(5,873)	$	(6,275)	$	(7,747)
University Circle Joint Venture	44,427		43,581		19,386		24,251		23,776		9,826		13,338		13,478		7,561
333 Market Street Joint Venture	28,170		27,006		12,971		14,929		14,620		6,948		8,211		8,312		5,331
114 Fifth Avenue Joint Venture	42,921		41,169		20,133		(10,674)		(10,256)		(4,885)		(5,283)		(5,077)		(2,820)
1800 M Street Joint Venture	38,377		37,486		8,005		4,887		4,239		619		2,688		2,332		326
799 Broadway Joint Venture	—		—		—		(882)		(132)		—		(439)		(66)		—
	$	201,632	$	194,057	$	102,244	$	20,996	$	19,943	$	(2,684)	$	12,642	$	12,704	$	2,651

⁽¹⁾Excludes amortization of basis differences, as described in footnote ⁽¹⁾ to the carrying value of investment table above, which are recorded as income (loss) from unconsolidated joint ventures in the accompanying consolidated statements of operations.

Asset and Property Management Fees

Columbia Property Trust provides property and asset management services to the Market Square Joint Venture, the University Circle Joint Venture, the 333 Market Street Joint Venture, and the 1800 M Street Joint Venture. Under these agreements, Columbia Property Trust oversees the day-to-day operations of these joint ventures and their properties, including property management, property accounting, and other administrative services. During the years ended December 31, 2019, 2018, and 2017, Columbia Property Trust earned the following fees from these unconsolidated joint ventures (in thousands):

	2019		2018		2017
Market Square Joint Venture	$	2,256	$	2,156	$	1,998
University Circle Joint Venture	2,313		2,283		1,000
333 Market Street Joint Venture	819		784		367
1800 M Street Joint Venture	2,156		2,161		417
	$	7,544	$	7,384	$	3,782

Columbia Property Trust also received reimbursements of property operating costs of $4.3 million, $4.2 million, and $2.0 million for the years ended December 31, 2019, 2018, and 2017, respectively, which are included in other property income revenues in the accompanying consolidated statements of operations. Property management fees of $0.6 million and $0.7 million, respectively, were due to Columbia Property Trust from the joint ventures and are included in prepaid expenses and other assets on the accompanying consolidated balance sheets as of December 31, 2019 and December 31, 2018, respectively.

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Unconsolidated Joint Ventures (Tables)

12 Months Ended

Dec. 31, 2019

Equity Method Investments and Joint Ventures [Abstract]

Summary of Financial Information for the Joint Ventures

As of December 31, 2019 and December 31, 2018, Columbia OP owns interests in the following properties through joint ventures, which are accounted for using the equity method of accounting:

		Geographic Market	Ownership Interest		Carrying Value of Investment(1)
Joint Venture	Property Name				December 31, 2019			December 31, 2018
Market Square Joint Venture	Market Square	Washington, D.C.	51.0	%	$	135,557		$	134,250
University Circle Joint Venture	University Circle	San Francisco	55.0	%	283,633			292,951
333 Market Street Joint Venture	333 Market Street	San Francisco	55.0	%	269,638			273,783
114 Fifth Avenue Joint Venture	114 Fifth Avenue	New York	49.5	%	87,750			99,283
1800 M Street Joint Venture	1800 M Street	Washington, D.C.	55.0	%	233,196			237,333
799 Broadway Joint Venture(2)	799 Broadway	New York	49.7	%	44,686		(4)	33,753
					$	1,054,460		$	1,071,353

⁽¹⁾Includes basis differences. Columbia Property Trust's investments in unconsolidated joint ventures were greater than the historical costs recorded at the underlying joint venture level by $279.2 million and $282.0 million as of December 31, 2019 and December 31, 2018, respectively. Such basis differences result from the timing of each partner's joint venture interest acquisition; and formation costs incurred by Columbia Property Trust. Basis differences are amortized to income (loss) from unconsolidated joint ventures over the lives of the underlying assets or liabilities.

⁽²⁾Columbia Property Trust capitalized interest of $1.3 million and $0.2 million on its investment in the 799 Broadway Joint Venture in 2019 and 2018, respectively.

Summarized balance sheet information for each of the unconsolidated joint ventures is as follows (in thousands):

	Total Assets				Total Debt					Total Equity(1)
	December 31, 2019		December 31, 2018		December 31, 2019			December 31, 2018		December 31, 2019		December 31, 2018
Market Square Joint Venture	$	582,747	$	582,176	$	324,815	(2)	$	324,762	$	241,719	$	241,581
University Circle Joint Venture	216,546		224,746		—			—		212,656		219,390
333 Market Street Joint Venture	367,652		375,884		—			—		352,385		360,915
114 Fifth Avenue Joint Venture	485,442		377,970		—			—		127,554		149,243
1800 M Street Joint Venture	437,439		447,585		—			—		421,588		429,016
799 Broadway Joint Venture	201,210		168,390		109,735		(3)	95,630		85,316		67,189
	$	2,291,036	$	2,176,751	$	434,550		$	420,392	$	1,441,218	$	1,467,334

⁽¹⁾Excludes basis differences (see footnote ⁽¹⁾ to the Carrying Value of Investment table above).

⁽²⁾The Market Square Joint Venture has a mortgage note with an outstanding balance of $325.0 million as of December 31, 2019 and December 31, 2018. The Market Square mortgage note bears interest at 5.07% and matures on July 1, 2023.

⁽³⁾Reflects $113.2 million outstanding, net of $3.5 million of net unamortized deferred financing costs, on the 799 Broadway construction loan. The 799 Broadway construction loan is being used to finance a portion of the 799 Broadway development project, has total capacity of $187.0 million, and bears interest at LIBOR, capped at 4.00%, plus a spread of 425 basis points (the "Construction Loan"). A portion of the monthly interest payments accrue into the balance of the loan. The Construction Loan matures on October 9, 2021, with two one-year extension options. For a discussion of Columbia Property Trust's equity guaranty related to the Construction Loan, see Note 7, Commitments and Contingencies.

Summarized income statement information for the unconsolidated joint ventures for the years ended December 31, 2019, 2018, and 2017 is as follows (in thousands):

	Total Revenues						Net Income (Loss)						Columbia Property Trust's Share of Net Income (Loss)(1)
	2019		2018		2017		2019		2018		2017		2019		2018		2017
Market Square Joint Venture	$	47,737	$	44,815	$	41,749	$	(11,515)	$	(12,304)	$	(15,192)	$	(5,873)	$	(6,275)	$	(7,747)
University Circle Joint Venture	44,427		43,581		19,386		24,251		23,776		9,826		13,338		13,478		7,561
333 Market Street Joint Venture	28,170		27,006		12,971		14,929		14,620		6,948		8,211		8,312		5,331
114 Fifth Avenue Joint Venture	42,921		41,169		20,133		(10,674)		(10,256)		(4,885)		(5,283)		(5,077)		(2,820)
1800 M Street Joint Venture	38,377		37,486		8,005		4,887		4,239		619		2,688		2,332		326
799 Broadway Joint Venture	—		—		—		(882)		(132)		—		(439)		(66)		—
	$	201,632	$	194,057	$	102,244	$	20,996	$	19,943	$	(2,684)	$	12,642	$	12,704	$	2,651

⁽¹⁾Excludes amortization of basis differences, as described in footnote ⁽¹⁾ to the carrying value of investment table above, which are recorded as income (loss) from unconsolidated joint ventures in the accompanying consolidated statements of operations.

During the years ended December 31, 2019, 2018, and 2017, Columbia Property Trust earned the following fees from these unconsolidated joint ventures (in thousands):

	2019		2018		2017
Market Square Joint Venture	$	2,256	$	2,156	$	1,998
University Circle Joint Venture	2,313		2,283		1,000
333 Market Street Joint Venture	819		784		367
1800 M Street Joint Venture	2,156		2,161		417
	$	7,544	$	7,384	$	3,782

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Leases (Tables)

12 Months Ended

Dec. 31, 2019

Leases [Abstract]

Schedule of Future Minimum Lease Payments To Be Made

As of December 31, 2019, the future minimum lease payments to be made by Columbia Property Trust under its operating lease are as follows (in thousands):

2020	$	728
2021	760
2022	793
2023	67
2024	—
Thereafter	—
Total lease payments	2,348
Less: interest expense	(162)
Present value of lease liabilities	$	2,186
Weighted-average remaining lease term (years)	3.1 years
Weighted-average discount rate	4.5		%

Summary of Impact of Operating Leases on Consolidated Balance Sheet

Columbia Property Trust's operating leases had the following impacts on the consolidated balance sheet as of December 31, 2019 (in thousands):

	Ground Leases		Office Lease		Total Operating Leases
Assets:
Total operating lease assets	$	27,843	$	1,627	$	29,470
Liabilities:
Total operating lease liabilities	$	—	$	2,186	$	2,186

Summary of Impact of Operating Leases on Statements of Operations and Statements of Cash Flows

Columbia Property Trust's operating leases had the following impacts on the consolidated statements of operations for 2019 (in thousands):

	Ground Leases		Office Lease		Total Operating Leases
Property operating costs	$	2,165	$	—	$	2,165
General and administrative – corporate	—		580		580
Total operating lease expenses	$	2,165	$	580	$	2,745

Columbia Property Trust's operating leases had the following impacts on the consolidated statements of cash flows for the 2019 (in thousands):

	Ground Leases		Office Lease		Total Operating Leases
Cash paid for operating lease liabilities included in cash flows from operations	$	(1,329)	$	(697)	$	(2,026)

Summary of Fixed and Variable Revenues

Fixed and variable payments for 2019 are as follows (in thousands):

Fixed payments	$	250,077
Variable payments	26,072
Total lease revenues	$	276,149

Schedule of Future Minimum Lease Payments To Be Received

As of December 31, 2019, the future minimum fixed lease payments due to Columbia Property Trust under non-cancelable operating leases are as follows (thousands):

2020	$	223,249
2021	224,999
2022	216,210
2023	205,955
2024	197,846
Thereafter	1,028,119
Total	$	2,096,378

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Segment Information (Tables)

12 Months Ended

Dec. 31, 2019

Segment Reporting [Abstract]

Reconciliation of Revenue from Segments to Consolidated

The following table presents property operating revenues by geographic reportable segment (in thousands):

	For the Years Ended December 31,
	2019		2018		2017
New York(1)	$	157,244	$	158,077	$	123,280
San Francisco(2)	114,295		105,947		105,550
Washington, D.C.(3)	58,200		57,274		36,934
Boston	14,285		13,441		11,559
Los Angeles	7,754		7,783		7,462
All other office markets	41,321		57,395		59,263
Total office segments	393,099		399,917		344,048
Hotel	—		—		1,328
Corporate	3,137		3,165		579
Total	$	396,236	$	403,082	$	345,955

⁽¹⁾Includes operating revenues for 101 Franklin Street from December 2, 2019 through December 31, 2019; and for one unconsolidated property, 114 Fifth Avenue, based on Columbia Property Trust's ownership interest (49.5%) from July 6, 2017 (acquisition date) through December 31, 2019.

⁽²⁾Includes operating revenues for two unconsolidated properties, 333 Market Street and University Circle, based on Columbia Property Trust's ownership interests: 100.0% from January 1, 2017 through July 5, 2017; 77.5% from July 6, 2017 through January 31, 2018; and 55.0% from February 1, 2018 through December 31, 2019.

⁽³⁾Includes operating revenues for two unconsolidated properties, Market Square and 1800 M Street, based on Columbia Property Trust's ownership interests: 51.0% for the Market Square for all periods presented; 55.0% for 1800 M Street from October 11, 2017 (acquisition date) through December 31, 2019.

A reconciliation of GAAP revenues to operating revenues is presented below (in thousands):

	For the Years Ended December 31,
	2019		2018		2017
Total revenues	$	288,837	$	297,943	$	289,000
Operating revenues included in income (loss) from unconsolidated joint ventures(1)	114,943		112,523		60,737
Less: asset and property management fee income(2)	(7,544)		(7,384)		(3,782)
Total property operating revenues	$	396,236	$	403,082	$	345,955

⁽¹⁾Columbia Property Trust records its interest in properties held through unconsolidated joint ventures using the equity method of accounting, and reflects its interest in the operating revenues of these properties in income (loss) from unconsolidated joint ventures in the accompanying consolidated statements of operations.

⁽²⁾See Note 11, Non-Lease Revenues, of the accompanying consolidated financial statements.

Schedule of Segment Reporting Information, by Segment

The following table presents net operating income by geographic reportable segment (in thousands):

	For the Years Ended December 31,
	2019		2018		2017
New York(1)	$	93,112	$	94,765	$	73,893
San Francisco(2)	83,305		79,354		76,163
Washington, D.C.(3)	33,953		34,750		18,496
Boston	7,539		7,205		5,380
Los Angeles	4,601		4,590		4,529
All other office markets	35,428		51,638		52,153
Total office segments	257,938		272,302		230,614
Hotel	—		—		(913)
Corporate	(904)		(803)		(826)
Total	$	257,034	$	271,499	$	228,875

⁽¹⁾Includes NOI for the following unconsolidated properties based on Columbia Property Trust's ownership interest:

•114 Fifth Avenue: (49.5%) from July 6, 2017 (acquisition date) through December 31, 2019

•799 Broadway: (49.7%) from October 3, 2018 (acquisition date) through December 31, 2019

⁽²⁾Includes NOI for the following unconsolidated properties based on Columbia Property Trust's ownership interests:

•333 Market Street and University Circle: (100.0%) from January 1, 2017 through July 5, 2017

•333 Market Street and University Circle: (77.5%) from July 6, 2017 through January 31, 2018

•333 Market Street and University Circle: (55.0%) from February 1, 2018 through December, 2019

⁽³⁾Includes NOI for the following unconsolidated properties based on Columbia Property Trust's ownership interest:

•Market Square: (51.0%) for all periods presented

•1800 M Street: (55.0%) from October 11, 2017 (acquisition date) through December 31, 2019

A reconciliation of GAAP net income to NOI is presented below (in thousands):

	For the Years Ended December 31,
	2019		2018		2017
Net income attributable to common stockholders	$	9,197	$	9,491	$	176,041
Depreciation	78,292		81,795		80,394
Amortization	27,908		32,554		32,403
Impairment loss on real estate assets	43,941		30,812		—
General and administrative – corporate	32,779		32,979		34,966
General and administrative – joint venture	3,567		3,108		1,454
Pre-acquisition costs	6,398		—		—
Net interest expense	42,997		56,477		58,187
Interest income from development authority bonds	—		(6,871)		(7,200)
(Gain) loss on extinguishment of debt	—		(23,340)		325
Income tax expense	21		37		(213)
Asset and property management fee income	(7,544)		(7,384)		(3,782)
Adjustments included in loss from unconsolidated joint venture	61,634		62,603		31,818
Gain on sale of unconsolidated joint venture interest	—		(762)		—
Gains on sales of real estate assets	(42,030)		—		(175,518)
Adjustment attributable to noncontrolling interests	(126)		—		—
Net operating income	$	257,034	$	271,499	$	228,875

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Unconsolidated Joint Ventures (Condensed Income Statement Information) (Details) - Corporate Joint Venture - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Schedule of Equity Method Investments [Line Items]
Total Revenues	$ 201,632	$ 194,057	$ 102,244
Net Income (Loss)	20,996	19,943	(2,684)
Columbia Property Trust's Share of Net Income (Loss)	12,642	12,704	2,651
Market Square Joint Venture
Schedule of Equity Method Investments [Line Items]
Total Revenues	47,737	44,815	41,749
Net Income (Loss)	(11,515)	(12,304)	(15,192)
Columbia Property Trust's Share of Net Income (Loss)	(5,873)	(6,275)	(7,747)
University Circle Joint Venture
Schedule of Equity Method Investments [Line Items]
Total Revenues	44,427	43,581	19,386
Net Income (Loss)	24,251	23,776	9,826
Columbia Property Trust's Share of Net Income (Loss)	13,338	13,478	7,561
333 Market Street Joint Venture
Schedule of Equity Method Investments [Line Items]
Total Revenues	28,170	27,006	12,971
Net Income (Loss)	14,929	14,620	6,948
Columbia Property Trust's Share of Net Income (Loss)	8,211	8,312	5,331
114 Fifth Avenue
Schedule of Equity Method Investments [Line Items]
Total Revenues	42,921	41,169	20,133
Net Income (Loss)	(10,674)	(10,256)	(4,885)
Columbia Property Trust's Share of Net Income (Loss)	(5,283)	(5,077)	(2,820)
1800 M Street Joint Venture
Schedule of Equity Method Investments [Line Items]
Total Revenues	38,377	37,486	8,005
Net Income (Loss)	4,887	4,239	619
Columbia Property Trust's Share of Net Income (Loss)	2,688	2,332	326
799 Broadway Joint Venture
Schedule of Equity Method Investments [Line Items]
Total Revenues	0	0	0
Net Income (Loss)	(882)	(132)	0
Columbia Property Trust's Share of Net Income (Loss)	$ (439)	$ (66)	$ 0

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Real Estate Transactions - Dispositions (Details) - USD ($)											3 Months Ended			12 Months Ended
	Sep. 26, 2019	Apr. 15, 2019	May 30, 2018	May 29, 2018	Apr. 13, 2018	Feb. 02, 2018	Feb. 01, 2018	Jul. 06, 2017	Jan. 31, 2017	Jan. 06, 2017	Sep. 30, 2019	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Business Acquisition [Line Items]
Gain (Loss) on Sale												$ 41,900,000
Impairment loss on real estate assets											$ 23,400,000		$ 30,800,000	$ 43,941,000	$ 30,812,000	$ 0
Gain (loss) on extinguishment of debt													24,000,000.0	0	23,340,000	(325,000)
Net proceeds from the sale of investments in unconsolidated joint ventures														0	$ 235,083,000	$ 0
Key Center Tower & Marriot
Business Acquisition [Line Items]
Gain (Loss) on Sale									$ 22,500,000
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Lindbergh Center
Business Acquisition [Line Items]
% Sold	100.00%
Sales Price	$ 187,000,000.0
Gain (Loss) on Sale	0
Impairment loss on real estate assets	23,400,000										$ 23,400,000
Disposal Group, Disposed of by Sale, Not Discontinued Operations | One & Three Glenlake
Business Acquisition [Line Items]
% Sold		100.00%
Sales Price		$ 227,500,000
Gain (Loss) on Sale		42,030,000
Adjustments for tenant improvement allowances and rent abatements		$ 33,600,000
Disposal Group, Disposed of by Sale, Not Discontinued Operations | 222 East 41st Street
Business Acquisition [Line Items]
% Sold				100.00%
Sales Price				$ 332,500,000
Gain (Loss) on Sale				0
Impairment loss on real estate assets													30,800,000
Disposal Group, Disposed of by Sale, Not Discontinued Operations | 263 Shuman Boulevard
Business Acquisition [Line Items]
% Sold					100.00%
Sales Price					$ 49,000,000
Gain (Loss) on Sale					24,039,000
Disposal Group, Disposed of by Sale, Not Discontinued Operations | University Circle & 333 Market Street
Business Acquisition [Line Items]
% Sold							22.50%	22.50%
Sales Price							$ 235,300,000	$ 234,000,000
Gain (Loss) on Sale							762,000	$ 102,365,000
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Key Center Tower & Marriot
Business Acquisition [Line Items]
% Sold									100.00%
Sales Price									$ 267,500,000
Gain (Loss) on Sale									9,466,000
Proceeds from sale of real estate held-for-investment, gross									254,500,000
Note receivable									$ 13,000,000.0
Term of note receivable									10 years
Deferred gain on sale of property									$ 13,000,000.0
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Houston Properties
Business Acquisition [Line Items]
% Sold										100.00%
Sales Price										$ 272,000,000
Gain (Loss) on Sale										$ 63,688,000
Revolving Credit Facility | $300 Million Bridge Loan
Business Acquisition [Line Items]
Repayments of debt	$ 46,000,000.0
Bridge Loan | $300 Million Bridge Loan
Business Acquisition [Line Items]
Repayments of debt			$ 180,000,000.0	180,000,000.0		$ 120,000,000.0
Bridge loan				$ 300,000,000										$ 300,000,000
Gain (loss) on extinguishment of debt			$ (300,000)
Mortgages | 263 Shuman Boulevard Building mortgage note
Business Acquisition [Line Items]
Extinguishment of debt					$ 49,000,000.0
Gain (loss) on extinguishment of debt													$ 24,000,000.0
San Francisco Joint Ventures | Corporate Joint Venture
Business Acquisition [Line Items]
Net proceeds from the sale of investments in unconsolidated joint ventures							$ 235,300,000
Ownership percentage							55.00%
San Francisco Joint Ventures | Corporate Joint Venture | Allianz
Business Acquisition [Line Items]
% Sold								22.50%
Additional ownership percentage acquired							22.50%
Net proceeds from the sale of investments in unconsolidated joint ventures								$ 234,000,000.0

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Line of Credit and Notes Payable (Maturities) (Details) $ in Thousands	Dec. 31, 2019 USD ($)
Debt Disclosure [Abstract]
2020	$ 0
2021	0
2022	150,000
2023	334,000
2024	300,000
Thereafter	0
Total	$ 784,000

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Schedule III - Real Estate Assets and Accumulated Depreciation and Amortization (Rollforward) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Jan. 31, 2018	Jul. 05, 2017
Real Estate:
Balance at beginning of year	$ 3,345,301	$ 3,612,294	$ 4,243,531
Additions to/improvements of real estate	531,336	87,398	698,567
Sale/transfer of real estate	(456,331)	(313,683)	(1,285,915)
Impairment of real estate	(43,941)	(30,812)	0
Write-offs of building and tenant improvements	(270)	(1,464)	(3,087)
Write-offs of intangible assets	(34,039)	(6,131)	(14,432)
Write-offs of fully depreciated assets	(5,608)	(2,301)	(26,370)
Balance at end of year	3,336,448	3,345,301	3,612,294
Accumulated Depreciation and Amortization:
Balance at beginning of year	487,485	482,627	729,025
Depreciation and amortization expense	90,926	98,858	97,732
Sale/transfer of real estate	(149,708)	(84,965)	(302,157)
Write-offs of tenant improvements	(228)	(603)	(1,406)
Write-offs of intangible assets	(3,888)	(6,131)	(14,197)
Write-offs of fully depreciated assets	(5,608)	(2,301)	(26,370)
Balance at end of year	$ 418,979	$ 487,485	$ 482,627
University Circle & 333 Market Street | Corporate Joint Venture
Accumulated Depreciation and Amortization:
Percentage of real estate transferred	100.00%
Ownership percentage	55.00%			77.50%	100.00%

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Income Taxes (Schedule of Income Tax Basis Net Income) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
GAAP basis financial statement net income attributable to common stockholders	$ (21,777)	$ (20,286)	$ 47,747	$ 3,513	$ 5,003	$ 6,429	$ (3,439)	$ 1,498	$ 9,197	$ 9,491	$ 176,041
Increase (Decrease) in Net Income Resulting From:
Depreciation and amortization expense for financial reporting purposes in excess of amounts for income tax purposes									41,648	43,753	33,918
Rental income accrued for financial reporting purposes in excess of (less than) amounts for income tax purposes									(10,373)	7,145	(38,426)
Net amortization of above-/below-market lease intangibles for financial reporting purposes less than amounts for income tax purposes									(5,107)	(5,990)	(6,091)
Interest expense for financial reporting purposes in excess of amounts for income tax purposes									5,852		0
Bad debt expense for financial reporting purposes less than (in excess of) amounts for income tax purposes									1	4	(31)
Income from unconsolidated joint ventures for financial reporting purposes in excess of amount for income tax purposes									15,224	16,654	13,902
Gains or losses on disposition of real property for financial reporting purposes that are more favorable than amounts for income tax purposes									(57,284)	79,376	(126,770)
Other expenses or revenues for financial reporting purposes in excess (less than) of amounts for income tax purposes									37,912	(32,342)	11,331
Income tax basis net income, prior to dividends-paid deduction									37,070	$ 118,091	$ 63,874
Tax basis carrying value of total assets	$ 4,400,000								$ 4,400,000

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Quarterly Results (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenues	$ 68,725	$ 71,949	$ 72,730	$ 75,433	$ 75,523	$ 73,340	$ 75,370	$ 73,710	$ 288,837	$ 297,943	$ 289,000
Net income	$ (21,777)	$ (20,286)	$ 47,747	$ 3,513	$ 5,003	$ 6,429	$ (3,439)	$ 1,498	$ 9,197	$ 9,491	$ 176,041
Net income attributable to common stockholders (in dollars per share)	$ (0.19)	$ (0.17)	$ 0.41	$ 0.03	$ 0.04	$ 0.05	$ (0.03)	$ 0.01	$ 0.08	$ 0.08	$ 1.45
Net income attributable to common stockholders (in dollars per share)	(0.19)	(0.17)	0.41	0.03	0.04	0.05	(0.03)	0.01	$ 0.08	$ 0.08	$ 1.45
Dividends declared per share (in dollars per share)	$ 0.21	$ 0.20	$ 0.20	$ 0.20	$ 0.20	$ 0.20	$ 0.20	$ 0.20
Gain on sale of real estate			$ 41,900
Impairment loss on real estate		$ 23,400					$ 30,800		$ 43,941	$ 30,812	$ 0
Gain on extinguishment of debt							$ 24,000		$ 0	$ 23,340	$ (325)
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Pasedena Corporate Park
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Impairment loss on real estate	$ 20,600

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Commitments and Contingencies

12 Months Ended

Dec. 31, 2019

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

Commitments and Contingencies

Commitments Under Existing Lease Agreements

Certain lease agreements include provisions that, at the option of the tenant, may obligate Columbia Property Trust to expend capital to expand an existing property or provide other expenditures for the benefit of the tenant. As of December 31, 2019, Columbia Property Trust had the following material tenant obligations which have arisen in the normal course of business: $17.5 million related to the WeWork lease at 149 Madison and $17.9 million related to the Pershing lease at 95 Columbus. Such amounts are payable as incurred, and therefore no accrual is booked as of December 31, 2019. Additionally, in January 2020, Columbia Property Trust preleased space to be added to 80 M Street in a vertical expansion project. Columbia is required to fund approximately $70.0 million related to construction and tenant improvement allowances for the new space.

Commitments Under Unconsolidated Joint Venture Agreements

Columbia Property Trust's joint venture agreements, including those that are developing or redeveloping properties, provide for capital contributions to be made to the joint ventures by the joint venture partners. As of December 31, 2019, Columbia Property Trust holds seven properties through consolidated and unconsolidated joint ventures, including three that are under development or redevelopment. Capital contributions are payable when a capital call is made by the joint venture, and there are no unfunded capital calls as of December 31, 2019.

Columbia Property Trust guarantees a portion of the debt held by the 799 Broadway Joint Venture. As of December 31, 2019, the 799 Broadway Joint Venture has $113.2 million in outstanding borrowings on the Construction Loan, as further described in Note 4, Unconsolidated Joint Ventures. Pursuant to a joint and several guaranty agreement with the Construction Loan lender, Columbia Property Trust and Normandy are required to make aggregate additional equity contributions to the joint venture based on the initial expected project costs, less the amount of equity contributions made to date. As of December 31, 2019, the remaining equity contribution requirement is $31.9 million, of which $15.8 million reflects Columbia Property Trust's allocated share. Equity contributions become payable by Columbia Property Trust to the joint venture when a capital call is received. As of December 31, 2018, no capital calls remain unpaid; therefore, no liability has been recorded related to this guaranty.

Litigation

Columbia Property Trust is subject to various legal proceedings, claims, and administrative proceedings arising in the ordinary course of business, some of which are expected to be covered by liability insurance. Management makes assumptions and estimates concerning the likelihood and amount of any reasonably possible loss relating to these matters using the latest information available. Columbia Property Trust records a liability for litigation if an unfavorable outcome is probable and the amount of loss or range of loss can be reasonably estimated. If an unfavorable outcome is probable and a reasonable estimate of the loss is a range, Columbia Property Trust accrues the best estimate within the range. If no amount within the range is a better estimate than any other amount, Columbia Property Trust accrues the minimum amount within the range. If an unfavorable outcome is probable but the amount of the loss cannot be reasonably estimated, Columbia Property Trust discloses the nature of the litigation and indicates that an estimate of the loss or range of loss cannot be made. If an unfavorable outcome is reasonably possible and the estimated loss is material, Columbia Property Trust discloses the nature and estimate of the possible loss of the litigation. Columbia Property Trust does not disclose information with respect to litigation where the possibility of an unfavorable outcome is considered to be remote. Based on current expectations, such matters, both individually and in the aggregate, are not expected to have a material adverse effect on the liquidity, results of operations, business, or financial condition of Columbia Property Trust. Columbia Property Trust is not currently involved in any legal proceedings of which management would consider the outcome to be reasonably likely to have a material adverse effect on the results of operations or financial condition of Columbia Property Trust.

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Real Estate Transactions

12 Months Ended

Dec. 31, 2019

Business Acquisitions and Dispositions [Abstract]

Real Estate Transactions

Real Estate Transactions

Acquisitions

During 2019, 2018, and 2017, Columbia Property Trust acquired the following properties:

Property	Location	Date	Percent Acquired		Purchase Price (in thousands)(1)
2019
201 California Street	San Francisco, CA	December 9, 2019	100.0	%	$	238,900
101 Franklin Street(2)	New York, NY	December 2, 2019	92.5	%	$	205,500
2018
Lindbergh Center – Retail	Atlanta, GA	October 24, 2018	100.0	%	$	23,000
799 Broadway	New York, NY	October 3, 2018	49.7	%	$	30,200	(3)
2017
149 Madison Avenue	New York, NY	November 28, 2017	100.0	%	$	87,700
1800 M Street	Washington, D.C.	October 11, 2017	55.0	%	$	231,550	(3)
249 West 17th Street & 218 West 18th Street	New York, NY	October 11, 2017	100.0	%	$	514,100
114 Fifth Avenue	New York, NY	July 6, 2017	49.5	%	$	108,900	(3)

⁽¹⁾Exclusive of transaction costs and price adjustments. See purchase price allocation table below for a breakout of the net purchase price for wholly owned properties.

⁽²⁾Property is owned through a consolidated joint venture.

⁽³⁾These properties are owned through unconsolidated joint ventures. Purchase price is for Columbia Property Trust's partial interests in the properties.

201 California Street

On December 9, 2019, Columbia Property Trust acquired 201 California Street, a 17-story, 252,000-square-foot office tower in San Francisco. As of the acquisition date, 201 California Street was 99% leased to 34 tenants, including First Republic Bank (13%), Dow Jones & Company, Inc. (12%), and Cooper, White & Cooper, LLP (12%). For the period from December 9, 2019 to December 31, 2019, Columbia Property Trust recognized revenues of $1.4 million and net income of $0.1 million from 201 California Street.

101 Franklin Street

On December 2, 2019, Columbia Property Trust acquired a 92.5% controlling financial interest in 101 Franklin Street (formerly 250 Church Street), a 16-story, 235,000-square-foot office building in Manhattan that will be fully redeveloped through a consolidated joint venture with an affiliate of Normandy (see Note 16, Subsequent Event). During 2019, Columbia Property Trust earned $37,000 from its investment in 101 Franklin Street.

Lindbergh Center – Retail

On October 24, 2018, Columbia Property Trust acquired the 147,000 square feet of ancillary retail and office space surrounding its existing property, Lindbergh Center, for a gross purchase price of $23.0 million. Lindbergh Center – Retail was sold in the Lindbergh Center disposition, as described below.

799 Broadway Joint Venture

On October 3, 2018, Columbia Property Trust formed a joint venture with an affiliate of Normandy (see Note 16, Subsequent Event) for the purpose of developing a 12-story, 182,000-square-foot office building at 799 Broadway in New York (the "799 Broadway Joint Venture"). Columbia Property Trust made an initial equity contribution of $30.2 million in the 799 Broadway Joint Venture for a 49.7% interest therein. At inception, the 799 Broadway Joint Venture acquired the property located at 799 Broadway for $145.5 million, exclusive of transaction costs and development costs, and borrowed $97.0 million under a construction loan with total capacity of $187.0 million.

149 Madison Avenue

149 Madison Avenue is a 12-story, 127,000-square-foot office building, which was vacant at the time of acquisition. Columbia Property Trust acquired 149 Madison Avenue subject to a ground lease which expired in January 2018. Columbia Property Trust is redeveloping this property. For the period from November 28, 2017 to December 31, 2017, Columbia Property Trust recognized $10,300 of revenues and net income of $9,200 from 149 Madison Avenue. All of the office space at 149 Madison Avenue is leased to WeWork.

1800 M Street Joint Venture

Columbia Property Trust entered a new joint venture partnership with Allianz Real Estate of America LLC ("Allianz"), which simultaneously acquired 1800 M Street, a 10-story, 581,000-square-foot office building in Washington, D.C. that is 94% leased, for a total of $421.0 million (the "1800 M Street Joint Venture"). Columbia Property Trust owns a 55% interest in the 1800 M Street Joint Venture, and Allianz owns the remaining 45%.

249 West 17th Street & 218 West 18th Street

249 West 17th Street is made up of two interconnected 12- and six-story towers, totaling 281,000 square feet of office and retail space, and 218 West 18th Street is a 12-story, 166,000-square-foot office building. As of the acquisition date, 249 West 17th Street was 100% leased to four tenants, including Twitter, Inc. (76%) and Room & Board, Inc. (21%); and, as of the acquisition date, 218 West 18th Street was 100% leased to seven tenants, including Red Bull North America, Inc. (25%), Company 3 (18%), SY Partners (16%), and SAE (16%). For the period from October 11, 2017 to December 31, 2017, Columbia Property Trust recognized revenues of $5.9 million and net income of $1.8 million from 249 West 17th Street, and revenues of $3.0 million and net income of $0.8 million from 218 West 18th Street.

114 Fifth Avenue Joint Venture

Columbia Property Trust acquired a 49.5% equity interest in a joint venture that owns the 114 Fifth Avenue property from Allianz (the "114 Fifth Avenue Joint Venture"). 114 Fifth Avenue is a 19-story, 352,000-square-foot building located in Manhattan's Flatiron District that is 100% leased, and is unencumbered by debt. The 114 Fifth Avenue Joint Venture is owned by Columbia Property Trust (49.5%), Allianz (49.5%), and L&L Holding Company (1.0%).

Purchase Price Allocations for Consolidated Property Acquisitions

	201 California Street		101 Franklin Street(1)		149 Madison Avenue		249 West 17th Street		218 West 18th Street
Location	San Francisco, CA		New York, NY		New York, NY		New York, NY		New York, NY
Date Acquired	December 9, 2019		December 2, 2019		November 28, 2017		October 11, 2017		October 11, 2017
Purchase Price:
Land	$	77,833	$	57,145	$	59,112	$	113,149	$	43,836
Building and improvements	157,513		149,500		28,989		194,109		126,957
Intangible lease assets	13,241		—		—		27,408		12,120
Intangible lease origination costs	5,785		—		—		13,062		4,168
Intangible below market lease liability	(8,064)		—		—		(7,131)		(11,757)
Total purchase price	$	246,308	$	206,645	$	88,101	$	340,597	$	175,324

⁽¹⁾Owned through a consolidated joint venture, in which Columbia Property Trust owns a 92.5% interest.

Note 2, Summary of Significant Accounting Policies, provides a discussion of the estimated useful life for each asset class.

Pro Forma Financial Information

The following unaudited pro forma statements of operations presented for 2019, 2018, and 2017, have been prepared for Columbia Property Trust to give effect to the acquisitions of 201 California Street and 101 Franklin Street as if the acquisitions had occurred on January 1, 2018; and 249 West 17th Street, 218 West 18th Street, and 149 Madison Avenue as if the acquisitions had occurred on January 1, 2016. The following unaudited pro forma financial results for Columbia Property Trust have been prepared for informational purposes only and are not necessarily indicative of future results or of actual results that would have been achieved had these acquisitions been consummated as of January 1, 2018 and January 1, 2016 (in thousands):

	2019		2018		2017
Revenues	$	304,756	$	312,003	$	319,064
Net income attributable to common stockholders of Columbia Property Trust	$	17,600	$	16,822	$	183,318

Dispositions

During 2019, 2018, and 2017, Columbia Property Trust sold the following properties and partial interest in properties of unconsolidated joint ventures. Additional information for certain of the dispositions is provided below the table.

Property	Location	Date	% Sold		Sale Price(1) (in thousands)			Gain on Sale (in thousands)
2019
Lindbergh Center	Atlanta, GA	September 26, 2019	100.0	%	$	187,000		$	—
One & Three Glenlake Parkway	Atlanta, GA	April 15, 2019	100.0	%	$	227,500		$	42,030
2018
222 East 41st Street	New York, NY	May 29, 2018	100.0	%	$	332,500		$	—
263 Shuman Boulevard	Chicago, IL	April 13, 2018	100.0	%	$	49,000		$	24,039
University Circle & 333 Market Street Joint Ventures	San Francisco, CA	February 1, 2018	22.5	%	$	235,300	(2)	$	762
2017
University Circle & 333 Market Street	San Francisco, CA	July 6, 2017	22.5	%	$	234,000	(2)	$	102,365
Key Center Tower & Marriott	Cleveland, OH	January 31, 2017	100.0	%	$	267,500		$	9,466
Houston Properties	Houston, TX	January 6, 2017	100.0	%	$	272,000		$	63,688

⁽¹⁾Exclusive of transaction costs and price adjustments.

⁽²⁾Sales price is for the partial interests in the properties or joint ventures that were sold.

Lindbergh Center

On September 26, 2019, Columbia Property Trust closed on the sale of Lindbergh Center, including Lindbergh Center – Retail, for a gross sales price of $187.0 million, exclusive of transaction costs. Columbia Property Trust recognized an impairment loss of $23.4 million related to this property in the third quarter of 2019, as further described in Note 2, Summary of Significant Accounting Policies. $46.0 million of the proceeds from this transaction were used to pay down the Revolving Credit Facility, as described in Note 5, Line of Credit and Notes Payable.

One & Three Glenlake Parkway

On April 15, 2019, Columbia Property Trust closed on the sale of One & Three Glenlake Parkway in Atlanta, for a gross sale price of $227.5 million, exclusive of $33.6 million of adjustments for tenant improvement allowances and rent abatements funded at closing. The proceeds from this transaction were used to pay down the Revolving Credit Facility, as described in Note 5, Line of Credit and Notes Payable.

222 East 41st Street

On May 29, 2018, Columbia Property Trust closed on the sale of 222 East 41st Street in New York, for $332.5 million, exclusive of transaction costs. Columbia Property Trust recognized an impairment loss of $30.8 million related to this property in the second quarter of 2018, as further described in Note 2, Summary of Significant Accounting Policies. The proceeds from this transaction were used to fully repay the $180.0 million remaining balance on a $300 million bridge loan, as described in Note 5, Line of Credit and Notes Payable.

263 Shuman Boulevard

On April 13, 2018, Columbia Property Trust transferred 263 Shuman Boulevard to the lender in extinguishment of the loan principal of $49.0 million, accrued interest expense, and accrued property operating costs, which resulted in a gain on extinguishment of debt of $24.0 million in the second quarter of 2018.

University Circle & 333 Market Street

On July 6, 2017, Columbia Property Trust contributed 333 Market Street and the University Circle to joint ventures, and simultaneously sold a 22.5% interest in those joint ventures for $234.0 million to Allianz, an unrelated third party (collectively, the "San Francisco Joint Ventures").

On February 1, 2018, as agreed at the time of the initial San Francisco Joint Ventures formation, Allianz acquired another 22.5% interest in each of the San Francisco Joint Ventures at an aggregate price of $235.3 million, thereby reducing Columbia Property Trust's equity interest in each joint venture to 55.0%. These proceeds were used to reduce the balance on a $300 million bridge loan and the Revolving Credit Facility, as described in Note 5, Line of Credit and Notes Payable.

Key Center Tower & Marriott

Key Center Tower & Marriott were sold in one transaction for $254.5 million of gross proceeds at closing and a $13.0 million, 10-year accruing note receivable from the principal of the buyer. As a result, Columbia Property Trust has applied the installment method to account for this transaction, and deferred $13.0 million of the total $22.5 million gain on sale.

Houston Property Sale

5 Houston Center, Energy Center I, and 515 Post Oak were sold in one transaction for $272.0 million of gross proceeds, which resulted in a $63.7 million gain on sale.

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Organization (Details) ft² in Millions	Dec. 31, 2019 ft² property
Real Estate
Square feet of commercial space | ft²	7.3
Leased office space of owned properties (as a percent)	97.10%
Office Building
Real Estate
Number of properties	17
Number of properties under development or redevelopment	3
Office Building | Wholly Owned Properties
Real Estate
Number of properties	13
Office Building | Corporate Joint Venture
Real Estate
Number of properties	7

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Line of Credit and Notes Payable (Tables)

12 Months Ended

Dec. 31, 2019

Debt Disclosure [Abstract]

Line of Credit and Notes Payable Indebtedness Outstanding (Excluding Bonds Payable)

As of December 31, 2019 and 2018, Columbia Property Trust had the following line of credit and notes payable indebtedness outstanding (excluding bonds payable; see Note 6, Bonds Payable) in thousands:

	Rate as of December 31, 2019		Term Debt or Interest Only		Outstanding Balance as of December 31,
Facility				Maturity	2019		2018
Revolving Credit Facility	LIBOR + 90 bp	(1)	Interest only	January 31, 2023	$	334,000	$	482,000
$300 Million Term Loan	LIBOR + 100 bp	(2)	Interest only	January 31, 2024	300,000		—
$150 Million Term Loan	LIBOR + 110 bp	(3)	Interest only	July 29, 2022	150,000		150,000
Less: Deferred financing costs related to term loans					(2,084)		(2,692)
Total indebtedness					$	781,916	$	629,308

⁽¹⁾As of December 31, 2019, borrowings under the Revolving Credit Facility, as described below, bear interest at the option of Columbia Property Trust at an alternate base rate, plus an applicable margin ranging from 0.00% to 0.45% for base-rate borrowings, or at LIBOR, as defined in the credit agreement, plus an applicable margin ranging from 0.775% to 1.45% for LIBOR-based borrowings, based on Columbia Property Trust's applicable credit rating.

⁽²⁾Columbia Property Trust is party to an interest rate swap agreement with a notional amount of $300.0 million, which effectively fixes its interest rate on the $300 Million Term Loan, as further described below, at 2.55% and terminates on August 13, 2024. This interest rate swap agreement qualifies for hedge accounting treatment; therefore, changes in the fair value are recorded as a market value adjustment to interest rate swap in the accompanying consolidated statement of other comprehensive income.

(3)Columbia Property Trust is party to an interest rate swap agreement with a notional amount of $150.0 million, which effectively fixes its interest rate on the $150 Million Term Loan, as further described below, at 3.07% and terminates on July 29, 2022. This interest rate swap agreement qualifies for hedge accounting treatment; therefore, changes in fair value are recorded as a market value adjustment to interest rate swap in the accompanying consolidated statement of other comprehensive income.

Aggregate Maturities of Columbia Property Trust's Line of Credit and Notes Payable

The following table summarizes the aggregate maturities of Columbia Property Trust's line of credit and notes payable as of December 31, 2019 (in thousands):

2020	$	—
2021	—
2022	150,000
2023	334,000
2024	300,000
Thereafter	—
Total	$	784,000

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Income Taxes (Tables)

12 Months Ended

Dec. 31, 2019

Income Tax Disclosure [Abstract]

Schedule of Income Tax Basis Net Income Reconciliation

Columbia Property Trust's income tax basis net income during 2019, 2018, and 2017 (in thousands) follows:

	2019		2018		2017
GAAP basis financial statement net income attributable to common stockholders	$	9,197	$	9,491	$	176,041
Increase (Decrease) in Net Income Resulting From:
Depreciation and amortization expense for financial reporting purposes in excess of amounts for income tax purposes	41,648		43,753		33,918
Rental income accrued for financial reporting purposes in excess of (less than) amounts for income tax purposes	(10,373)		7,145		(38,426)
Net amortization of above-/below-market lease intangibles for financial reporting purposes less than amounts for income tax purposes	(5,107)		(5,990)		(6,091)
Interest expense for financial reporting purposes in excess of amounts for income tax purposes	5,852		—		—
Bad debt expense for financial reporting purposes less than (in excess of) amounts for income tax purposes	1		4		(31)
Income from unconsolidated joint ventures for financial reporting purposes in excess of amount for income tax purposes	15,224		16,654		13,902
Gains or losses on disposition of real property for financial reporting purposes that are more favorable than amounts for income tax purposes	(57,284)		79,376		(126,770)
Other expenses or revenues for financial reporting purposes in excess (less than) of amounts for income tax purposes	37,912		(32,342)		11,331
Income tax basis net income, prior to dividends-paid deduction	$	37,070	$	118,091	$	63,874

Schedule of Distributions to Common Stockholders

Columbia Property Trust's distributions per common share are summarized as follows:

	2019		2018		2017
Ordinary income	53.1	%	100.0	%	58.5	%
Capital gains	—	%	—	%	—	%
Return of capital	46.9	%	—	%	41.5	%
Total	100.0	%	100.0	%	100.0	%

Schedule of Income Taxes

The income taxes recorded by the TRS Entities for the years ended December 31, 2019, 2018, and 2017, are as follows:

	Years Ended December 31,
	2019		2018		2017
Federal income tax	$	14	$	63	$	188
State income tax	6		(26)		38
Total income tax	$	20	$	37	$	226

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Segment Information

12 Months Ended

Dec. 31, 2019

Segment Reporting [Abstract]

Segment Information

Segment Information

Columbia Property Trust establishes operating segments at the property level, and aggregates individual properties into reportable segments for high-barrier-to-entry markets and other geographic locations in which Columbia Property Trust has significant investments. Columbia Property Trust considers geographic location when evaluating its portfolio composition, and in assessing the ongoing operations and performance of its properties. As of December 31, 2019, Columbia Property Trust had the following reportable segments: New York, San Francisco, Washington, D.C., Boston, Los Angeles, and all other office markets. The all other office markets reportable segment consists of properties in similar low-barrier-to-entry geographic locations in which Columbia Property Trust does not have a substantial presence and/or does not plan to make further investments. Upon selling its remaining properties in Atlanta, Columbia Property Trust has combined Atlanta and the all other office markets reportable segment for all periods presented. During the periods presented, there have been no material intersegment transactions.

Net operating income ("NOI") is a non-GAAP financial measure and is not considered a measure of operating results or cash flows from operations under GAAP. NOI is the primary performance measure reviewed by management to assess operating performance of properties and is calculated by deducting operating expenses from operating revenues. Operating revenues include lease revenues, hotel income, and other property income; and operating expenses include property and hotel operating costs. The NOI performance metric consists of only revenues and expenses directly related to real estate rental operations. NOI reflects property acquisitions and dispositions, occupancy levels, rental rate increases or decreases, and the recoverability of operating expenses. NOI, as Columbia Property Trust calculates it, may not be directly comparable to similarly titled, but differently calculated, measures for other REITs.

Asset information and capital expenditures by segment are not reported because Columbia Property Trust does not use these measures to assess performance. Depreciation and amortization expense, along with other expense and income items, are not allocated among segments.

The following table presents property operating revenues by geographic reportable segment (in thousands):

	For the Years Ended December 31,
	2019		2018		2017
New York(1)	$	157,244	$	158,077	$	123,280
San Francisco(2)	114,295		105,947		105,550
Washington, D.C.(3)	58,200		57,274		36,934
Boston	14,285		13,441		11,559
Los Angeles	7,754		7,783		7,462
All other office markets	41,321		57,395		59,263
Total office segments	393,099		399,917		344,048
Hotel	—		—		1,328
Corporate	3,137		3,165		579
Total	$	396,236	$	403,082	$	345,955

⁽¹⁾Includes operating revenues for 101 Franklin Street from December 2, 2019 through December 31, 2019; and for one unconsolidated property, 114 Fifth Avenue, based on Columbia Property Trust's ownership interest (49.5%) from July 6, 2017 (acquisition date) through December 31, 2019.

⁽²⁾Includes operating revenues for two unconsolidated properties, 333 Market Street and University Circle, based on Columbia Property Trust's ownership interests: 100.0% from January 1, 2017 through July 5, 2017; 77.5% from July 6, 2017 through January 31, 2018; and 55.0% from February 1, 2018 through December 31, 2019.

⁽³⁾Includes operating revenues for two unconsolidated properties, Market Square and 1800 M Street, based on Columbia Property Trust's ownership interests: 51.0% for the Market Square for all periods presented; 55.0% for 1800 M Street from October 11, 2017 (acquisition date) through December 31, 2019.

A reconciliation of GAAP revenues to operating revenues is presented below (in thousands):

	For the Years Ended December 31,
	2019		2018		2017
Total revenues	$	288,837	$	297,943	$	289,000
Operating revenues included in income (loss) from unconsolidated joint ventures(1)	114,943		112,523		60,737
Less: asset and property management fee income(2)	(7,544)		(7,384)		(3,782)
Total property operating revenues	$	396,236	$	403,082	$	345,955

⁽¹⁾Columbia Property Trust records its interest in properties held through unconsolidated joint ventures using the equity method of accounting, and reflects its interest in the operating revenues of these properties in income (loss) from unconsolidated joint ventures in the accompanying consolidated statements of operations.

⁽²⁾See Note 11, Non-Lease Revenues, of the accompanying consolidated financial statements.

The following table presents net operating income by geographic reportable segment (in thousands):

	For the Years Ended December 31,
	2019		2018		2017
New York(1)	$	93,112	$	94,765	$	73,893
San Francisco(2)	83,305		79,354		76,163
Washington, D.C.(3)	33,953		34,750		18,496
Boston	7,539		7,205		5,380
Los Angeles	4,601		4,590		4,529
All other office markets	35,428		51,638		52,153
Total office segments	257,938		272,302		230,614
Hotel	—		—		(913)
Corporate	(904)		(803)		(826)
Total	$	257,034	$	271,499	$	228,875

⁽¹⁾Includes NOI for the following unconsolidated properties based on Columbia Property Trust's ownership interest:

•114 Fifth Avenue: (49.5%) from July 6, 2017 (acquisition date) through December 31, 2019

•799 Broadway: (49.7%) from October 3, 2018 (acquisition date) through December 31, 2019

⁽²⁾Includes NOI for the following unconsolidated properties based on Columbia Property Trust's ownership interests:

•333 Market Street and University Circle: (100.0%) from January 1, 2017 through July 5, 2017

•333 Market Street and University Circle: (77.5%) from July 6, 2017 through January 31, 2018

•333 Market Street and University Circle: (55.0%) from February 1, 2018 through December, 2019

⁽³⁾Includes NOI for the following unconsolidated properties based on Columbia Property Trust's ownership interest:

•Market Square: (51.0%) for all periods presented

•1800 M Street: (55.0%) from October 11, 2017 (acquisition date) through December 31, 2019

A reconciliation of GAAP net income to NOI is presented below (in thousands):

	For the Years Ended December 31,
	2019		2018		2017
Net income attributable to common stockholders	$	9,197	$	9,491	$	176,041
Depreciation	78,292		81,795		80,394
Amortization	27,908		32,554		32,403
Impairment loss on real estate assets	43,941		30,812		—
General and administrative – corporate	32,779		32,979		34,966
General and administrative – joint venture	3,567		3,108		1,454
Pre-acquisition costs	6,398		—		—
Net interest expense	42,997		56,477		58,187
Interest income from development authority bonds	—		(6,871)		(7,200)
(Gain) loss on extinguishment of debt	—		(23,340)		325
Income tax expense	21		37		(213)
Asset and property management fee income	(7,544)		(7,384)		(3,782)
Adjustments included in loss from unconsolidated joint venture	61,634		62,603		31,818
Gain on sale of unconsolidated joint venture interest	—		(762)		—
Gains on sales of real estate assets	(42,030)		—		(175,518)
Adjustment attributable to noncontrolling interests	(126)		—		—
Net operating income	$	257,034	$	271,499	$	228,875

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Non-Lease Revenues

12 Months Ended

Dec. 31, 2019

Revenue from Contract with Customer [Abstract]

Non-Lease Revenues

Non-Lease Revenues

Columbia Property Trust applies Accounting Standard Codification 606, Revenues from Contracts with Customers ("ASC 606"), to its non-lease revenue streams outlined below. ASC 606 requires companies to perform a five-step analysis of transactions to determine when and how revenue is recognized. See Note 10, Leases, for information about revenues earned under leases.

Asset and Property Management Fee Income

Under asset and property management agreements in place with certain of its unconsolidated joint ventures, Columbia Property Trust earns revenue for performing asset and property management functions for properties owned through its joint ventures, as further described in Note 4, Unconsolidated Joint Ventures. During 2019, 2018, and 2017, Columbia Property Trust earned revenues of $7.5 million, $7.4 million, and $3.8 million, respectively, under these agreements. Asset and property management services are ongoing and routine, and are provided on a recurring basis. Therefore such fees are recognized ratably over the service period, usually a period of three months. Columbia Property Trust receives payments quarterly for asset management fees and monthly for property management fees.

Leasing Override Fees

Under the asset management agreements for certain properties owned through unconsolidated joint ventures, Columbia Property Trust is eligible to earn leasing override fees equal to a percentage of the total rental payments to be made by the tenant over the term of the lease. Such fees are required to be recognized when Columbia Property Trust's obligation to perform is complete, typically upon execution of the lease. Prior to January 1, 2018, such fees were not recognized until billable to the applicable joint venture, typically upon commencement of the lease. Upon implementing ASC 606, effective January 1, 2018, Columbia Property Trust accelerated the recognition of lease override fees related to a lease that had been executed but not yet commenced, by recording $0.3 million of lease override fees receivable as prepaid expenses and other assets and a cumulative-effect adjustment to increase equity by the same amount. During 2019 and 2018, Columbia Property Trust earned leasing override fees of $0.1 million and $0.2 million, respectively, which are included in asset and property management fee income on the accompanying consolidated statements of operations. During 2017, Columbia Property Trust did not earn any leasing override fees.

Salary and Other Reimbursement Revenue

Under the property management agreements for certain properties owned through unconsolidated joint ventures, Columbia Property Trust receives reimbursements for salaries and property operating costs for ongoing and routine services that are provided by Columbia Property Trust employees on a recurring basis. Such revenues are recognized ratably over the service period, usually a period of one month, three months, or one year. During 2019, 2018, and 2017, Columbia Property Trust earned salary and other reimbursement revenue of $4.5 million, $4.4 million, and $2.3 million, respectively. These amounts are included in other property income on the accompanying consolidated statements of income.

Miscellaneous Revenue

Columbia Property Trust also receives revenues for services provided to its tenants through the TRS Entities, including fitness centers, shuttles, and cafeterias, which are included in other property income on the accompanying consolidated statements of income. Such services are ongoing and routine, and are provided on a recurring basis. These revenues are recognized ratably over the service period, usually a period of one month or one quarter. During 2019, 2018, and 2017, Columbia Property Trust earned miscellaneous revenue of $0.3 million, $0.7 million, and $0.6 million, respectively. These amounts are included in other property income on the accompanying consolidated statements of income.

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Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2019

Accounting Policies [Abstract]

Schedule of Estimated Useful Lives for Real Estate Assets

The estimated useful lives of its assets by class are as follows:

Buildings	40 years
Building and site improvements	5-25 years
Tenant improvements	Shorter of economic life or lease term
Intangible lease assets	Lease term

Assets and liabilities held for sale

The major classes of assets and liabilities classified as held for sale are provided below (in thousands):

	December 31, 2019
Real Estate Assets Held for Sale:
Real estate assets, at cost:
Land	$	57,117
Buildings and improvements, less accumulated depreciation of $80,543	157,701
Construction in progress	138
Total real estate assets held for sale, net	$	214,956
Other Assets Held for Sale:
Tenant receivables	$	156
Straight-line rent receivable	12,591
Prepaid expenses and other assets	334
Deferred lease costs, less accumulated amortization of $10,222	10,836
Total other assets held for sale, net	$	23,917
Liabilities Held for Sale:
Accounts payable, accrued expenses, and accrued capital expenditures	$	1,151
Deferred income	1,903
Total liabilities held for sale	$	3,054

Schedule of Intangible Assets and Liabilities

As of December 31, 2019 and 2018, Columbia Property Trust had the following gross intangible in-place lease assets and liabilities (in thousands):

		Intangible Lease Assets				Intangible Lease Origination Costs		Intangible Below-Market In-Place Lease Liabilities
		Above-Market In-Place Lease Assets		Absorption Period Costs
December 31, 2019	Gross	$	2,481	$	117,203	$	61,702	$	36,966
	Accumulated Amortization	(1,202)		(57,457)		(33,731)		(15,127)
	Net	$	1,279	$	59,746	$	27,971	$	21,839
December 31, 2018	Gross	$	3,174	$	147,668	$	99,440	$	42,847
	Accumulated Amortization	(1,060)		(81,220)		(65,348)		(21,766)
	Net	$	2,114	$	66,448	$	34,092	$	21,081

During 2019, 2018, and 2017, Columbia Property Trust recognized the following amortization of intangible lease assets and liabilities (in thousands):

	Intangible Lease Assets				Intangible Lease Origination Costs		Intangible Below-Market In-Place Lease Liabilities
	Above-Market In-Place Lease Assets		Absorption Period Costs
For the Years Ended December 31,
2019	$	288	$	13,511	$	7,398	$	5,395
2018	$	228	$	17,137	$	9,660	$	6,851
2017	$	519	$	16,807	$	10,124	$	6,883

Schedule of Net Below-Market Lease Asset Amortization

The remaining net intangible assets and liabilities as of December 31, 2019, will be amortized as follows (in thousands):

	Intangible Lease Assets				Intangible Lease Origination Costs		Intangible Below-Market In-Place Lease Liabilities
	Above-Market In-Place Lease Assets		Absorption Period Costs
For the Years Ending December 31,
2020	$	172	$	12,871	$	5,866	$	5,483
2021	172		9,328		4,516		3,191
2022	172		7,959		3,429		2,910
2023	172		6,455		2,903		2,336
2024	172		5,594		2,586		1,990
Thereafter	419		17,539		8,671		5,929
	$	1,279	$	59,746	$	27,971	$	21,839
Weighted-average amortization period	6.6 years		5.0 years		4.9 years		5.3 years

Schedule of Interest Rate Derivatives

The following tables provide additional information related to Columbia Property Trust's interest rate swaps as of December 31, 2019 and 2018 (in thousands):

		Estimated Fair Value as of December 31,
Instrument Type	Balance Sheet Classification	2019		2018
Derivatives Designated as Hedging Instruments:
Interest rate contracts	Prepaid expenses and other assets	$	551	$	2,344
Interest rate contracts	Accounts payable	$	1,652	$	—

	Years Ended December 31,
	2019		2018		2017
Market value adjustment to interest rate swaps designated as hedging instruments and included in other comprehensive income (loss)	$	(3,445)	$	1,441	$	1,786

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Real Estate Transactions - Pro Forma (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Business Acquisitions and Dispositions [Abstract]
Revenues	$ 304,756	$ 312,003	$ 319,064
Net income attributable to common stockholders of Columbia Property Trust	$ 17,600	$ 16,822	$ 183,318

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Summary of Significant Accounting Policies - Schedule of Estimated Useful Lives for Real Estate (Details)	12 Months Ended
	Dec. 31, 2019
Office Lease
Real Estate Properties [Line Items]
Estimated useful life of assets (in years)	40 years
Building Improvements | Minimum
Real Estate Properties [Line Items]
Estimated useful life of assets (in years)	5 years
Building Improvements | Maximum
Real Estate Properties [Line Items]
Estimated useful life of assets (in years)	25 years

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Summary of Significant Accounting Policies (Interest Rate Swaps) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($) interestRateSwap	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Summary of Derivative Instruments Impact on Results of Operations [Abstract]
Market value adjustment to interest rate swaps designated as hedging instruments and included in other comprehensive income (loss)	$ (3,445)	$ 1,441	$ 1,786
Interest Rate Contract
Derivatives, Fair Value [Line Items]
Number of interest rate swaps | interestRateSwap	2
Notional amount	$ 450,000
Interest Rate Contract | Prepaid Expenses and Other Assets
Derivative, Fair Value, Net [Abstract]
Derivative designated as hedging instruments, interest rate contracts	551	2,344
Interest Rate Contract | Accounts Payable
Derivative, Fair Value, Net [Abstract]
Derivative designated as hedging instruments, interest rate contracts	$ 1,652	$ 0

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Consolidated Statements of Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Cumulative Distributions in Excess of Earnings	Accumulated Other Comprehensive Income (Loss)	Total	Noncontrolling Interests
Balance, shares at beginning of period at Dec. 31, 2016		122,184,000
Balance, value at beginning of period at Dec. 31, 2016	$ 2,502,768	$ 1,221	$ 4,538,912	$ (2,036,482)	$ (883)	$ 2,502,768
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Repurchases of common stock, shares		(2,682,000)
Repurchases of common stock	(57,628)	$ (26)	(57,602)			(57,628)
Common stock issued to employees and directors, and amortized (net of income tax witholdings), shares		287,000
Common stock issued to employees and directors, and amortized (net of income tax witholdings)	5,764	$ 3	5,761			5,764
Distributions to common stockholders	(96,795)			(96,795)		(96,795)
Net income	176,041			176,041		176,041
Market value adjustment to interest rate swaps	1,786				1,786	1,786
Balance, shares at end of period at Dec. 31, 2017		119,789,000
Balance, value at end of period at Dec. 31, 2017	2,531,936	$ 1,198	4,487,071	(1,957,236)	903	2,531,936
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Repurchases of common stock, shares		(3,240,000)
Repurchases of common stock	(70,520)	$ (32)	(70,488)			(70,520)
Common stock issued to employees and directors, and amortized (net of income tax witholdings), shares		149,000
Common stock issued to employees and directors, and amortized (net of income tax witholdings)	5,005	$ 1	5,004			5,005
Distributions to common stockholders	(94,435)			(94,435)		(94,435)
Net income	9,491			9,491		9,491
Market value adjustment to interest rate swaps	$ 1,441				1,441	1,441
Balance, shares at end of period at Dec. 31, 2018	116,698,033	116,698,000
Balance, value at end of period at Dec. 31, 2018	$ 2,741,016	$ 1,167	4,421,587	(1,684,082)	2,344	2,741,016	$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Repurchases of common stock, shares		(1,616,000)
Repurchases of common stock	(33,516)	$ (16)	(33,500)			(33,516)
Common stock issued to employees and directors, and amortized (net of income tax witholdings), shares		198,000
Common stock issued to employees and directors, and amortized (net of income tax witholdings)	4,237	$ 2	4,235			4,237
Distributions to common stockholders	(94,349)			(94,349)		(94,349)
Contributions from noncontrolling interest in consolidated joint venture	5,610						5,610
Net income	9,064			9,197		9,197	(133)
Market value adjustment to interest rate swaps	$ (3,445)				(3,445)	(3,445)
Balance, shares at end of period at Dec. 31, 2019	115,280,597	115,280,000
Balance, value at end of period at Dec. 31, 2019	$ 2,628,617	$ 1,153	$ 4,392,322	$ (1,769,234)	$ (1,101)	$ 2,623,140	$ 5,477

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Leases - Narrative (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($) ground_lease	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Lessee, Lease, Description [Line Items]
Number of contracts | ground_lease	1
Operating lease assets	$ 29,470
Operating lease liabilities	$ 2,186
Remaining lease term (in years)	7 years 4 months 24 days
Gain (Loss) on Termination of Lease	$ 400	$ 2,200	$ 400
Minimum
Lessee, Lease, Description [Line Items]
Remaining term of contract (in years)	58 years
Maximum
Lessee, Lease, Description [Line Items]
Remaining term of contract (in years)	3 years

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Stockholders' Equity and Partner's Capital - Summary of the Activity of the Employee Stock Grants (Details) - Long Term Incentive Plan - $ / shares shares in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Weighted-Average Grant-Date Fair Value [Abstract]
Expected forfeiture rate	4.00%
Restricted Shares
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Unvested shares, beginning balance (shares)	375	389	256
Granted (shares)	176	139	333
Vested (shares)	(165)	(153)	(193)
Forfeited (shares)	(12)	0	(7)
Unvested shares, ending balance (shares)	374	375	389
Weighted-Average Grant-Date Fair Value [Abstract]
Unvested shares, beginning balance (in dollars per share)	$ 22.15	$ 21.85	$ 22.62
Granted (in dollars per share)	19.36	22.97	21.59
Vested (in dollars per share)	21.99	22.13	22.42
Forfeited (in dollars per share)	20.66	0	21.81
Unvested shares, ending balance (in dollars per share)	$ 20.96	$ 22.15	$ 21.85
Shares expected to ultimately vest (in shares)	360
RSUs
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Unvested shares, beginning balance (shares)	454	329	0
Granted (shares)	257	206	331
Vested (shares)	(121)	(70)	0
Forfeited (shares)	(6)	(11)	(2)
Unvested shares, ending balance (shares)	584	454	329
Weighted-Average Grant-Date Fair Value [Abstract]
Unvested shares, beginning balance (in dollars per share)	$ 19.37	$ 0	$ 0
Granted (in dollars per share)	17.66	20.55	18.78
Vested (in dollars per share)	19.08	19.47	0
Forfeited (in dollars per share)	18.67	18.60	19.01
Unvested shares, ending balance (in dollars per share)	$ 18.86	$ 19.37	$ 0
Shares expected to ultimately vest (in shares)	562

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Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Real Estate Assets, at Cost:
Land	$ 870,352	$ 817,975
Buildings and improvements, less accumulated depreciation of $281,248 and $403,355, as of December 31, 2019 and 2018, respectively	1,719,207	1,910,041
Intangible lease assets, less accumulated amortization of $58,659 and $84,881, as of December 31, 2019 and 2018, respectively	61,025	98,540
Construction in progress	53,621	33,800
Real estate assets held for sale, less accumulated depreciation and amortization of $22,464 as of December 31, 2019	214,956	0
Total real estate assets	2,919,161	2,860,356
Operating lease assets	29,470
Investments in unconsolidated joint ventures	1,054,460	1,071,353
Cash and cash equivalents	12,303	17,118
Tenant receivables, net of allowance for doubtful accounts of $4 as of December 31, 2018	2,464	3,258
Straight-line rent receivable	77,330	87,159
Prepaid Expense and Other Assets	21,484	23,218
Intangible lease origination costs, less accumulated amortization of $33,731 and $65,348, as of December 31, 2019 and 2018, respectively	27,971	34,092
Deferred lease costs, less accumulated amortization of $14,272 and $19,342, as of December 31, 2019 and 2018, respectively	76,385	77,439
Other assets held for sale, less accumulated amortization of $3,971 as of December 31, 2019	23,917	0
Total assets	4,244,945	4,173,993
Liabilities:
Line of credit and notes payable, net of deferred financing costs of $2,084 and $2,692, as of December 31, 2019 and 2018, respectively	781,916	629,308
Bonds payable, net of discount of $1,124 and $1,304 and deferred financing costs of $3,552 and $4,158, as of December 31, 2019 and 2018, respectively	695,324	694,538
Operating lease liabilities	2,186
Accounts payable, accrued expenses, and accrued capital expenditures	70,845	49,117
Dividends payable	24,209	23,340
Deferred income	16,955	15,593
Intangible lease liabilities, less accumulated amortization of $15,127 and $21,766, as of December 31, 2019 and 2018, respectively	21,839	21,081
Liabilities held for sale	3,054	0
Total liabilities	1,616,328	1,432,977
Commitments and Contingencies (Note 7)	0	0
Equity:
Common stock, $0.01 par value, 225,000,000 shares authorized, 115,280,597 and 116,698,033 shares issued and outstanding as of December 31, 2019 and 2018, respectively	1,153	1,167
Additional paid-in capital	4,392,322	4,421,587
Cumulative distributions in excess of earnings	(1,769,234)	(1,684,082)
Accumulated other comprehensive income (loss)	(1,101)	2,344
Total stockholders' equity attributable to Columbia Property Trust	2,623,140	2,741,016
Noncontrolling interest in consolidated joint venture	5,477	0
Total equity	2,628,617	2,741,016
Partners' Capital:
Total liabilities and equity	4,244,945	4,173,993
Columbia Property Trust Operating Partnership, L.P.
Real Estate Assets, at Cost:
Land	843,546	775,656
Buildings and improvements, less accumulated depreciation of $281,248 and $403,355, as of December 31, 2019 and 2018, respectively	1,668,358	1,720,271
Intangible lease assets, less accumulated amortization of $58,659 and $84,881, as of December 31, 2019 and 2018, respectively	61,025	98,540
Construction in progress	51,240	32,526
Real estate assets held for sale, less accumulated depreciation and amortization of $22,464 as of December 31, 2019	69,274	0
Total real estate assets	2,693,443	2,626,993
Operating lease assets	27,843
Investments in unconsolidated joint ventures	1,054,460	1,071,353
Cash and cash equivalents	9,522	10,931
Tenant receivables, net of allowance for doubtful accounts of $4 as of December 31, 2018	2,039	2,956
Straight-line rent receivable	70,985	71,675
Prepaid Expense and Other Assets	21,044	21,680
Intangible lease origination costs, less accumulated amortization of $33,731 and $65,348, as of December 31, 2019 and 2018, respectively	27,971	34,092
Deferred lease costs, less accumulated amortization of $14,272 and $19,342, as of December 31, 2019 and 2018, respectively	73,699	65,484
Other assets held for sale, less accumulated amortization of $3,971 as of December 31, 2019	5,573	0
Total assets	3,986,579	3,905,164
Liabilities:
Line of credit and notes payable, net of deferred financing costs of $2,084 and $2,692, as of December 31, 2019 and 2018, respectively	781,916	629,308
Bonds payable, net of discount of $1,124 and $1,304 and deferred financing costs of $3,552 and $4,158, as of December 31, 2019 and 2018, respectively	695,324	694,538
Accounts payable, accrued expenses, and accrued capital expenditures	68,535	36,133
Due to affiliates	140,444	141,145
Deferred income	16,299	13,245
Intangible lease liabilities, less accumulated amortization of $15,127 and $21,766, as of December 31, 2019 and 2018, respectively	21,839	21,081
Liabilities held for sale	1,809	0
Total liabilities	1,726,166	1,535,450
Commitments and Contingencies (Note 7)	0	0
Partners' Capital:
Partners' Capital	2,254,936	2,369,714
Noncontrolling interest in consolidated joint venture	5,477	0
Total capital	2,260,413	2,369,714
Total liabilities and equity	$ 3,986,579	$ 3,905,164

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Subsequent Events (Details) $ / shares in Units, $ in Millions					3 Months Ended
	Feb. 07, 2020 $ / shares	Jan. 24, 2020 USD ($) component $ / shares shares	Jan. 16, 2020 USD ($)	Jan. 07, 2020 USD ($)	Dec. 31, 2019 $ / shares	Sep. 30, 2019 $ / shares	Jun. 30, 2019 $ / shares	Mar. 31, 2019 $ / shares	Dec. 31, 2018 $ / shares	Sep. 30, 2018 $ / shares	Jun. 30, 2018 $ / shares	Mar. 31, 2018 $ / shares
Subsequent Event [Line Items]
Dividend declared, per share (in dollars per share) | $ / shares					$ 0.21	$ 0.20	$ 0.20	$ 0.20	$ 0.20	$ 0.20	$ 0.20	$ 0.20
Subsequent Event
Subsequent Event [Line Items]
Dividend declared, per share (in dollars per share) | $ / shares	$ 0.21
Dividends payable				$ 24.2
Subsequent Event | Cranberry Woods Drive
Subsequent Event [Line Items]
Sale of real estate assets			$ 180.0
Subsequent Event | Normandy Acquisition
Subsequent Event [Line Items]
Purchase price		$ 100.0
Number of components of purchase price | component		2
Cash payment		$ 13.5
Subsequent Event | Normandy Acquisition | Time-based Stock Awards
Subsequent Event [Line Items]
Issuance of shares (in shares) | shares		128,399
Subsequent Event | Normandy Acquisition | Performance-Based Restricted Stock Units
Subsequent Event [Line Items]
Issuance of shares (in shares) | shares		104,968
Subsequent Event | Normandy Acquisition | Columbia OP
Subsequent Event [Line Items]
Ownership percentage		97.20%
Subsequent Event | Normandy Acquisition | Series A Convertible, Perpetual Preferred Units
Subsequent Event [Line Items]
Issuance of shares (in shares) | shares		3,264,151
Liquidation preference (usd per share) | $ / shares		$ 26.50

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Leases - Schedule of Future Minimum Lease Payments To Be Received (Details) $ in Thousands	Dec. 31, 2019 USD ($)
Leases [Abstract]
2020	$ 223,249
2021	224,999
2022	216,210
2023	205,955
2024	197,846
Thereafter	1,028,119
Total	$ 2,096,378

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Income Taxes (Effective Tax Rate Reconciliation) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Contingency [Line Items]
Total income tax	$ 21	$ 37	$ (213)
Deferred tax asset	200	200
Columbia TRS
Income Tax Contingency [Line Items]
Federal income tax	14	63	188
State income tax	6	(26)	38
Total income tax	$ 20	$ 37	$ 226

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Segment Information (Reconciliation of Net Operating Income) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Oct. 03, 2018	Jan. 31, 2018	Oct. 11, 2017	Jul. 06, 2017	Jul. 05, 2017
Segment Reporting Information [Line Items]
Net operating income including consolidated joint venture	$ 257,034	$ 271,499	$ 228,875
Operating Segments
Segment Reporting Information [Line Items]
Net operating income including consolidated joint venture	257,938	272,302	230,614
Operating Segments | New York
Segment Reporting Information [Line Items]
Net operating income including consolidated joint venture	93,112	94,765	73,893
Operating Segments | San Francisco
Segment Reporting Information [Line Items]
Net operating income including consolidated joint venture	83,305	79,354	76,163
Operating Segments | Washington, D.C.
Segment Reporting Information [Line Items]
Net operating income including consolidated joint venture	33,953	34,750	18,496
Operating Segments | Boston
Segment Reporting Information [Line Items]
Net operating income including consolidated joint venture	7,539	7,205	5,380
Operating Segments | Los Angeles
Segment Reporting Information [Line Items]
Net operating income including consolidated joint venture	4,601	4,590	4,529
Operating Segments | All other office markets
Segment Reporting Information [Line Items]
Net operating income including consolidated joint venture	35,428	51,638	52,153
Segment Reconciling Items
Segment Reporting Information [Line Items]
Net operating income including consolidated joint venture	0	0	(913)
Corporate
Segment Reporting Information [Line Items]
Net operating income including consolidated joint venture	$ (904)	$ (803)	$ (826)
114 Fifth Avenue | Corporate Joint Venture
Segment Reporting Information [Line Items]
Ownership percentage	49.50%						49.50%
799 Broadway Joint Venture | Corporate Joint Venture
Segment Reporting Information [Line Items]
Ownership percentage	49.70%			49.70%
University Circle & 333 Market Street | Corporate Joint Venture
Segment Reporting Information [Line Items]
Ownership percentage	55.00%				77.50%			100.00%
Market Square Joint Venture | Corporate Joint Venture
Segment Reporting Information [Line Items]
Ownership percentage	51.00%
1800 M Street Joint Venture | Corporate Joint Venture
Segment Reporting Information [Line Items]
Ownership percentage	55.00%					55.00%

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Line of Credit and Notes Payable - Schedule of Long-Term Debt (excluding Bonds Payable) (Details) - USD ($)		12 Months Ended
	Dec. 07, 2018	Dec. 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Outstanding debt		$ 781,916,000	$ 629,308,000
Less: Deferred financing costs related to term loans		(2,084,000)	(2,692,000)
Total indebtedness		781,916,000	629,308,000
Credit Facilities | Revolving Credit Facility
Debt Instrument [Line Items]
Outstanding debt		334,000,000	482,000,000
Term Loans
Debt Instrument [Line Items]
Less: Deferred financing costs related to term loans		(2,084,000)	(2,692,000)
Term Loans | $300 Million Term Loan
Debt Instrument [Line Items]
Debt face amount	$ 300,000,000	300,000,000
Outstanding debt		$ 300,000,000	0
Effective interest rate		2.55%
Term Loans | $150 Million Term Loan
Debt Instrument [Line Items]
Debt face amount		$ 150,000,000
Outstanding debt		$ 150,000,000	$ 150,000,000
Effective interest rate		3.07%
Base Rate | Credit Facilities | Minimum | Revolving Credit Facility
Debt Instrument [Line Items]
Variable rate margin	0.00%
Base Rate | Credit Facilities | Maximum | Revolving Credit Facility
Debt Instrument [Line Items]
Variable rate margin	0.45%
Base Rate | Term Loans | Minimum | $300 Million Term Loan
Debt Instrument [Line Items]
Variable rate margin	0.00%
Base Rate | Term Loans | Maximum | $300 Million Term Loan
Debt Instrument [Line Items]
Variable rate margin	0.65%
London Interbank Offered Rate (LIBOR) | Credit Facilities | Revolving Credit Facility
Debt Instrument [Line Items]
Variable rate margin		0.90%
London Interbank Offered Rate (LIBOR) | Credit Facilities | Minimum | Revolving Credit Facility
Debt Instrument [Line Items]
Variable rate margin	0.775%
London Interbank Offered Rate (LIBOR) | Credit Facilities | Maximum | Revolving Credit Facility
Debt Instrument [Line Items]
Variable rate margin	1.45%
London Interbank Offered Rate (LIBOR) | Term Loans | $300 Million Term Loan
Debt Instrument [Line Items]
Variable rate margin		1.00%
London Interbank Offered Rate (LIBOR) | Term Loans | $150 Million Term Loan
Debt Instrument [Line Items]
Variable rate margin		1.10%
London Interbank Offered Rate (LIBOR) | Term Loans | Minimum | $300 Million Term Loan
Debt Instrument [Line Items]
Variable rate margin	0.85%
London Interbank Offered Rate (LIBOR) | Term Loans | Maximum | $300 Million Term Loan
Debt Instrument [Line Items]
Variable rate margin	1.65%
Interest Rate Swap | $300 Million Term Loan
Debt Instrument [Line Items]
Notional amount		$ 300,000,000.0
Interest Rate Swap | $150 Million Term Loan
Debt Instrument [Line Items]
Notional amount		$ 150,000,000.0

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Unconsolidated Joint Ventures (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Prepaid Expenses and Other Assets | Corporate Joint Venture
Related Party Transaction [Line Items]
Property management fees due to Columbia Property Trust	$ 600	$ 700
Asset and property management fee income/expenses
Related Party Transaction [Line Items]
Revenue	7,544	7,384	$ 3,782
Asset and property management fee income/expenses | Other Property Income | Corporate Joint Venture
Related Party Transaction [Line Items]
Revenue	$ 4,300	$ 4,200	$ 2,000

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Supplemental Disclosure of Noncash Investing and Financing Activities (Tables)

12 Months Ended

Dec. 31, 2019

Supplemental Cash Flow Elements [Abstract]

Schedule of Other Significant Noncash Transactions

Outlined below are significant noncash investing and financing activities for Columbia Property Trust, Inc. for the years ended December 31, 2019, 2018, and 2017 (in thousands): 

	Years Ended December 31,
	2019		2018		2017
Investment in real estate funded with other assets	$	—	$	617	$	311
Deposits applied to sales of real estate	$	—	$	—	$	10,000
Other assets assumed upon acquisition	$	6	$	259	$	1,014
Other liabilities assumed upon acquisition	$	137	$	664	$	268
Real estate assets transferred to unconsolidated joint venture	$	—	$	—	$	558,122
Other assets transferred to unconsolidated joint venture	$	—	$	—	$	43,700
Other liabilities transferred to unconsolidated joint venture	$	—	$	—	$	21,347
Extinguishment of 263 Shuman Boulevard mortgage note by transferring property to lender	$	—	$	49,000	$	—
Settlement of capital lease obligation with related development authority bonds	$	—	$	120,000	$	—
Amortization of net discounts on debt	$	180	$	180	$	180
Accrued investments in unconsolidated joint ventures	$	198	$	386	$	—
Accrued capital expenditures and deferred lease costs	$	12,944	$	15,145	$	25,069
Operating lease liability recorded at adoption of ASC 842	$	34,791	$	—	$	—
Accrued dividends payable	$	24,209	$	23,340	$	23,961
Cumulative-effect adjustment to equity for the adoption of ASU 2017-05 and 2014-09	$	—	$	358,098	$	—
Market value adjustment to interest rate swaps that qualify for hedge accounting treatment	$	(3,445)	$	1,441	$	1,786
Common stock issued to employees and directors, and amortized (net of income tax witholdings)	$	6,622	$	6,966	$	7,580

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Quarterly Results (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2019

Quarterly Financial Information Disclosure [Abstract]

Schedule of Quarterly Financial Information

Presented below is a summary of the unaudited quarterly financial information for the years ended December 31, 2019 and 2018 (in thousands, except per-share data):

	2019
	First Quarter		Second Quarter			Third Quarter			Fourth Quarter
Revenues	$	75,433	$	72,730		$	71,949		$	68,725
Net income (loss) attributable to common stockholders	$	3,513	$	47,747	(1)	$	(20,286)	(2)	$	(21,777)	(3)
Net income (loss) attributable to common stockholders per share – basic(4)	$	0.03	$	0.41		$	(0.17)		$	(0.19)
Net income (loss) attributable to common stockholders per share – diluted(4)	$	0.03	$	0.41		$	(0.17)		$	(0.19)
Dividends declared per share	$	0.20	$	0.20		$	0.20		$	0.21

	2018
	First Quarter		Second Quarter			Third Quarter		Fourth Quarter
Revenues	$	73,710	$	75,370		$	73,340	$	75,523
Net income (loss) attributable to common stockholders	$	1,498	$	(3,439)	(5)	$	6,429	$	5,003
Net income (loss) attributable to common stockholders – basic(4)	$	0.01	$	(0.03)		$	0.05	$	0.04
Net income (loss) attributable to common stockholders – diluted(4)	$	0.01	$	(0.03)		$	0.05	$	0.04
Dividends declared per share	$	0.20	$	0.20		$	0.20	$	0.20

⁽¹⁾Net income attributable to common stockholders for the second quarter of 2019 includes a gain on sale of real estate assets of $41.9 million, as described in Note 3, Real Estate Transactions.

⁽²⁾Net loss attributable to common stockholders for the third quarter of 2019 includes an impairment loss on real estate of $23.4 million related to sales of real estate assets, as described in Note 3, Real Estate Transactions.

⁽³⁾Net loss attributable to common stockholders for the third quarter of 2019 includes an impairment loss on real estate of $20.6 million related to sales of real estate assets, as described in Note 2, Summary of Significant Accounting Policies.

⁽⁴⁾Quarterly net income (loss) per share – basic and diluted is calculated based on quarterly basic and diluted weighted-average shares outstanding, respectively.

⁽⁵⁾Net loss attributable to common stockholders for the second quarter of 2018 includes an impairment loss on real estate of $30.8 million related to sales of real estate assets, as described in Note 3, Real Estate Transactions, and a gain on extinguishment of debt of $24.0 million, related to the settlement of a mortgage note, as described in Note 5, Line of Credit and Notes Payable.

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Supplemental Disclosures of Noncash Investing and Financing Activities

12 Months Ended

Dec. 31, 2019

Supplemental Cash Flow Elements [Abstract]

Supplemental Disclosures of Noncash Investing and Financing Activities

Supplemental Disclosures of Noncash Investing and Financing Activities

Outlined below are significant noncash investing and financing activities for Columbia Property Trust, Inc. for the years ended December 31, 2019, 2018, and 2017 (in thousands): 

	Years Ended December 31,
	2019		2018		2017
Investment in real estate funded with other assets	$	—	$	617	$	311
Deposits applied to sales of real estate	$	—	$	—	$	10,000
Other assets assumed upon acquisition	$	6	$	259	$	1,014
Other liabilities assumed upon acquisition	$	137	$	664	$	268
Real estate assets transferred to unconsolidated joint venture	$	—	$	—	$	558,122
Other assets transferred to unconsolidated joint venture	$	—	$	—	$	43,700
Other liabilities transferred to unconsolidated joint venture	$	—	$	—	$	21,347
Extinguishment of 263 Shuman Boulevard mortgage note by transferring property to lender	$	—	$	49,000	$	—
Settlement of capital lease obligation with related development authority bonds	$	—	$	120,000	$	—
Amortization of net discounts on debt	$	180	$	180	$	180
Accrued investments in unconsolidated joint ventures	$	198	$	386	$	—
Accrued capital expenditures and deferred lease costs	$	12,944	$	15,145	$	25,069
Operating lease liability recorded at adoption of ASC 842	$	34,791	$	—	$	—
Accrued dividends payable	$	24,209	$	23,340	$	23,961
Cumulative-effect adjustment to equity for the adoption of ASU 2017-05 and 2014-09	$	—	$	358,098	$	—
Market value adjustment to interest rate swaps that qualify for hedge accounting treatment	$	(3,445)	$	1,441	$	1,786
Common stock issued to employees and directors, and amortized (net of income tax witholdings)	$	6,622	$	6,966	$	7,580

During 2019, 2018, and 2017, Columbia OP recorded non-cash contributions (distributions) from (to) Columbia Property Trust of $(7.0) million, $165.9 million, and $(65.2) million, respectively, to settle due from (to) affiliate account balances.

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Line of Credit and Notes Payable

12 Months Ended

Dec. 31, 2019

Debt Disclosure [Abstract]

Line of Credit and Notes Payable

Line of Credit and Notes Payable

Columbia OP is the borrower on all of Columbia Property Trust's outstanding debt. As of December 31, 2019 and 2018, Columbia Property Trust had the following line of credit and notes payable indebtedness outstanding (excluding bonds payable; see Note 6, Bonds Payable) in thousands:

	Rate as of December 31, 2019		Term Debt or Interest Only		Outstanding Balance as of December 31,
Facility				Maturity	2019		2018
Revolving Credit Facility	LIBOR + 90 bp	(1)	Interest only	January 31, 2023	$	334,000	$	482,000
$300 Million Term Loan	LIBOR + 100 bp	(2)	Interest only	January 31, 2024	300,000		—
$150 Million Term Loan	LIBOR + 110 bp	(3)	Interest only	July 29, 2022	150,000		150,000
Less: Deferred financing costs related to term loans					(2,084)		(2,692)
Total indebtedness					$	781,916	$	629,308

⁽¹⁾As of December 31, 2019, borrowings under the Revolving Credit Facility, as described below, bear interest at the option of Columbia Property Trust at an alternate base rate, plus an applicable margin ranging from 0.00% to 0.45% for base-rate borrowings, or at LIBOR, as defined in the credit agreement, plus an applicable margin ranging from 0.775% to 1.45% for LIBOR-based borrowings, based on Columbia Property Trust's applicable credit rating.

⁽²⁾Columbia Property Trust is party to an interest rate swap agreement with a notional amount of $300.0 million, which effectively fixes its interest rate on the $300 Million Term Loan, as further described below, at 2.55% and terminates on August 13, 2024. This interest rate swap agreement qualifies for hedge accounting treatment; therefore, changes in the fair value are recorded as a market value adjustment to interest rate swap in the accompanying consolidated statement of other comprehensive income.

⁽³⁾Columbia Property Trust is party to an interest rate swap agreement with a notional amount of $150.0 million, which effectively fixes its interest rate on the $150 Million Term Loan, as further described below, at 3.07% and terminates on July 29, 2022. This interest rate swap agreement qualifies for hedge accounting treatment; therefore, changes in fair value are recorded as a market value adjustment to interest rate swap in the accompanying consolidated statement of other comprehensive income.

Term Loan and Line of Credit Amendment and Restatement

On December 7, 2018, Columbia Property Trust amended and restated its $500.0 million revolving credit facility and $300.0 million unsecured term loan (together, the "Credit Agreement"). The Credit Agreement provides for (i) a $650.0 million unsecured revolving credit facility (the "Revolving Credit Facility"), with an initial term ending January 31, 2023 and two six-month extension options (for a total possible extension option of one year to January 31, 2024), subject to the paying of certain fees and the satisfaction of certain other conditions, and (ii) a 12-month, delayed-draw, $300.0 million unsecured term loan, with a term ending January 31, 2024 (the "$300 Million Term Loan"). The $300 Million Term Loan was fully drawn during 2019.

At Columbia Property Trust's option, borrowings under the Credit Agreement bear interest at either (i) the alternate base rate plus an applicable margin based on five stated pricing levels ranging from 0.00% to 0.45% for the Revolving Credit Facility and 0.00% to 0.65% for the $300 Million Term Loan, or (ii) the LIBOR rate, as defined in the credit agreement, plus an applicable margin based on five stated pricing levels ranging from 0.775% to 1.45% for the Revolving Credit Facility and 0.85% to 1.65% for the $300 Million Term Loan, in each case based on Columbia Property Trust's credit rating. As described above, the interest rate on the $300 Million Term Loan has been effectively fixed at 2.55% with an interest rate swap agreement.

Debt Covenants

As of December 31, 2019, the $300 Million Term Loan, the $150 Million Term Loan, and the Revolving Credit Facility (collectively, the "Debt Facilities") contain representations and warranties, financial and other affirmative and

negative covenants, events of defaults, and remedies typical for these types of facilities. The financial covenants as defined in the Debt Facilities:

•limit the ratio of secured debt to total asset value to 40% or less;

•require the fixed charge coverage ratio to be at least 1.50:1.00;

•limit the ratio of debt to total asset value to 60% or less, or 65% or less following a material transaction;

•require the unencumbered interest coverage ratio to be at least 1.75:1.00; and

•limit the unencumbered leverage ratio to 60% or less, or 65% or less following a material transaction.

As of December 31, 2019, Columbia Property Trust was in compliance with the restrictive financial covenants on its Debt Facilities and notes payable obligations.

Fair Value of Debt

The estimated fair value of Columbia Property Trust's consolidated line of credit and notes payable as of December 31, 2019 and 2018, was approximately $784.1 million and $632.1 million, respectively. The related carrying value of the line of credit and notes payable as of December 31, 2019 and 2018, was $784.0 million and $632.0 million, respectively. Columbia Property Trust estimated the fair value of its Revolving Credit Facility and term loans by obtaining estimates for similar facilities from multiple market participants as of the respective reporting dates. Therefore, the fair values determined are considered to be based on observable market data for similar instruments (Level 2).

Interest Paid and Capitalized

As of December 31, 2019 and 2018, Columbia Property Trust's weighted-average interest rate on its consolidated line of credit and notes payable was approximately 2.63% and 3.26%, respectively. Columbia Property Trust made interest payments of approximately $17.9 million, $22.1 million, and $21.5 million during 2019, 2018, and 2017, respectively.

Columbia Property Trust capitalizes interest on development, redevelopment, and improvement projects owned directly and through joint ventures, using the weighted-average interest rate of its consolidated borrowings for the period. During 2019, 2018, and 2017, Columbia Property Trust capitalized interest of $5.1 million, $4.0 million, and $0.3 million, respectively. For 2019, the weighted average interest rate on Columbia Property Trust's outstanding borrowings was 3.55%.

Debt Repayments and Extinguishment

There were no debt repayments in 2019. During 2018 Columbia Property Trust made the following debt repayments:

•On December 7, 2018, concurrent with closing on the Credit Agreement, Columbia Property Trust repaid the $300.0 million remaining balance on the $300 Million Term Loan, which, as described above, includes a delayed-draw feature, allowing up to 12 months to fully draw the term loan.

•On October 10, 2018, Columbia Property Trust repaid the $20.7 million outstanding balance on the One Glenlake mortgage note two months prior to its original maturity date.

•On April 13, 2018, Columbia Property Trust transferred 263 Shuman Boulevard to the lender in extinguishment of the $49.0 million loan principal, accrued interest expense, and accrued property operating expenses, which resulted in a gain on extinguishment of debt of $24.0 million in the second quarter of 2018.

•On February 2, 2018, Columbia Property Trust repaid $120.0 million of the outstanding balance on a $300.0 million bridge loan, using a portion of the proceeds from the sale of an interest in the San Francisco Joint Ventures, as described in Note 3, Real Estate Transactions. On May 30, 2018, Columbia Property Trust repaid the remaining $180.0 million outstanding balance on the bridge loan, using a portion of the proceeds from the sale of 222 East 41st Street, as described in Note 3, Real Estate Transactions. As a result, Columbia Property Trust has recognized a loss on extinguishment of debt of $0.3 million related to unamortized deferred financing costs.

The following table summarizes the aggregate maturities of Columbia Property Trust's line of credit and notes payable as of December 31, 2019 (in thousands):

2020	$	—
2021	—
2022	150,000
2023	334,000
2024	300,000
Thereafter	—
Total	$	784,000

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Organization	12 Months Ended
	Dec. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization	OrganizationColumbia Property Trust, Inc. ("Columbia Property Trust") (NYSE: CXP) is a Maryland corporation that operates as a real estate investment trust ("REIT") for federal income tax purposes and owns and operates commercial real estate properties. Columbia Property Trust conducts business primarily through Columbia Property Trust Operating Partnership, L.P. ("Columbia OP"), a Delaware limited partnership in which Columbia Property Trust is the general partner and sole owner as of December 31, 2019. Columbia Property Trust acquires, develops, redevelops, owns, leases, and operates real properties directly and through wholly and partially owned subsidiaries and joint ventures. Unless stated otherwise or the context otherwise requires, references to "Columbia Property Trust," "the Company," "we," "us," and "our" shall mean, collectively, Columbia Property Trust, Columbia OP, and the entities consolidated by both Columbia Property Trust and Columbia OP; and references to "Columbia OP" shall mean Columbia OP and the entities consolidated by Columbia OP.As of December 31, 2019, the Company owned 17 operating properties and three properties under development or redevelopment, of which 13 were wholly owned and seven were owned through joint ventures, located primarily in New York, San Francisco, and Washington, D.C. As of December 31, 2019 the operating properties contained a total of 7.3 million rentable square feet and were approximately 97.1% leased.

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Schedule III - Real Estate Assets and Accumulated Depreciation and Amortization

12 Months Ended

Dec. 31, 2019

SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation Disclosure [Abstract]

Schedule III - Real Estate Assets and Accumulated Depreciation and Amortization

Columbia Property Trust, Inc. Columbia Property Trust Operating Partnership, L.P. Schedule III – Real Estate Assets and Accumulated Depreciation and Amortization December 31, 2019 (in thousands)
							Initial Costs						Costs Capitalized Subsequent to Acquisition		Gross Amount at Which Carried at December 31, 2019						Accumulated Depreciation and Amortization		Date of Construc- tion		Life on Which Depreciation and Amortization is Computed(b)
Description	Location	Owner- ship %		Encum-brances			Land		Buildings and Improvements		Total				Land		Buildings and Improvements		Total(a)					Date Acquired
80 M Street(c)	Washington, D.C.	100	%	None			$	26,248	$	76,269	$	102,517	$	6,732	$	26,806	$	82,443	$	109,249	$	29,214	2001	6/29/2004	0 to 40 years
95 Columbus	Jersey City, NJ	100	%	None			29,061		141,544		170,605		13,137		29,712		154,030		183,742		72,086		1989	10/31/2006	0 to 40 years
Pasadena Corporate Park	Pasadena, CA	100	%	None			53,099		59,630		112,729		(20,992)		41,604		50,133		91,737		22,463		1965/2000/ 2002/2003	7/11/2007	0 to 40 years
Cranberry Woods Drive(c)	Cranberry Township, PA	100	%	None			15,512		173,062		188,574		15,187		15,512		188,249		203,761		58,079		2009/2010	6/1/2010	0 to 40 years
221 Main Street	San Francisco, CA	100	%	None			60,509		174,629		235,138		19,871		60,509		194,500		255,009		41,491		1974	4/22/2014	0 to 40 years
650 California Street	San Francisco, CA	100	%	None			75,384		240,441		315,825		27,757		75,384		268,198		343,582		49,732		1964	9/9/2014	0 to 40 years
315 Park Avenue South	New York, NY	100	%	None			119,633		249,510		369,143		35,718		119,633		285,228		404,861		38,039		1910	1/7/2015	0 to 40 years
116 Huntington Avenue	Boston, MA	100	%	None		(d)	—		116,290		116,290		26,670		—		142,960		142,960		25,824		1991	1/8/2015	0 to 40 years
229 West 43rd Street	New York, NY	100	%	None			207,233		292,991		500,224		2,226		207,233		295,217		502,450		47,597		1912/1924/ 1932/1947	8/4/2015	0 to 40 years
249 West 17th Street	New York, NY	100	%	None			113,149		221,517		334,666		4,354		113,149		225,871		339,020		18,867		1902/1909	10/11/2017	0 to 40 years
218 West 18th Street	New York, NY	100	%	None			43,836		139,077		182,913		5,716		43,836		144,793		188,629		14,868		1912	10/11/2017	0 to 40 years
149 Madison Avenue(e)	New York, NY	100	%	None			59,112		28,989		88,101		22,408		59,112		51,397		110,509		—		(e)	11/28/2017	0 to 40 years
101 Franklin Street(e)	New York, NY	92.5	%	None			57,145		149,500		206,645		2,373		57,145		151,873		209,018		—		(e)	12/2/2019	0 to 40 years
201 California Street	San Francisco, CA	100	%	None			77,833		170,754		248,587		3,334		77,833		174,088		251,921		719		1948	12/9/2019	0 to 40 years
TOTAL CONSOLIDATED REAL ESTATE ASSETS(f)							$	937,754	$	2,234,203	$	3,171,957	$	164,491	$	927,468	$	2,408,980	$	3,336,448	$	418,979
UNCONSOLIDATED REAL ESTATE ASSETS (presented at 100% of the Joint Venture's Basis)(g):
Market Square	Washington, D.C.	51.0	%	$	325,000		$	152,629	$	450,757	$	603,386	$	(15,552)	$	152,629	$	435,205	$	587,834	$	59,629	1990	10/28/2015	0 to 40 years
University Circle	East Palo Alto, CA	55.0	%	None			27,493		278,288		305,781		(96,941)		27,756		181,084		208,840		13,591		2001/2002/ 2003	7/6/2017	0 to 40 years
333 Market Street	San Francisco, CA	55.0	%	None			114,483		292,840		407,323		(41,230)		114,483		251,610		366,093		20,680		1979	7/6/2017	0 to 40 years
114 Fifth Avenue	New York, NY	49.5	%	None		(h)	—		383,694		383,694		2,301		—		385,995		385,995		52,714		1910	7/6/2017	0 to 40 years
1800 M Street	Washington, D.C.	55.0	%	None			125,735		272,353		398,088		35,285		125,735		307,638		433,373		32,459		1975	10/11/2017	0 to 40 years
799 Broadway(e)	New York, NY	49.7	%	$	113,200		145,991		4,865		150,856		47,001		145,991		51,866		197,857		—		(e)	10/3/2018	0 to 40 years
TOTAL UNCONSOLIDATED REAL ESTATE ASSETS							$	566,331	$	1,682,797	$	2,249,128	$	(69,136)	$	566,594	$	1,613,398	$	2,179,992	$	179,073

^(a)The aggregate cost of consolidated land and buildings and improvements for federal income tax purposes is approximately $3.475 billion.

^(b)Columbia Property Trust assets are depreciated or amortized using the straight-line method over the useful lives of the assets by class. Generally, tenant improvements are amortized over the shorter of economic life or lease term, lease intangibles are amortized over the respective lease term, building improvements are depreciated over 5-25 years, and buildings are depreciated over 40 years.

^(c)80 M Street and Cranberry Woods Drive are owned directly by Columbia Property Trust, Inc.; therefore, they are not consolidated into Columbia OP.

^(d)116 Huntington Avenue is owned subject to a long-term, pre-paid ground lease.

^(e)101 Franklin Street, 149 Madison, and 799 Broadway are under development.

^(f)Consolidated real estate assets excludes $3.2 million of corporate assets.

^(g)The aggregate cost of 100% of the land and buildings and improvements, net of debt, held by unconsolidated joint ventures for federal income tax purposes is approximately $1.834 billion.

^(h)Property is owned subject to a long-term ground lease.

Columbia Property Trust, Inc.

Columbia Property Trust Operating Partnership, L.P.

Schedule III – Real Estate Assets and Accumulated Depreciation and Amortization

(in thousands)

	For the Years Ended December 31,
	2019		2018		2017
Real Estate:
Balance at beginning of year	$	3,345,301	$	3,612,294	$	4,243,531
Additions to/improvements of real estate	531,336		87,398		698,567
Sale/transfer of real estate	(456,331)		(313,683)		(1,285,915)		(1)
Impairment of real estate	(43,941)		(30,812)		—
Write-offs of building and tenant improvements	(270)		(1,464)		(3,087)
Write-offs of intangible assets(2)	(34,039)		(6,131)		(14,432)
Write-offs of fully depreciated assets	(5,608)		(2,301)		(26,370)
Balance at end of year	$	3,336,448	$	3,345,301	$	3,612,294
Accumulated Depreciation and Amortization:
Balance at beginning of year	$	487,485	$	482,627	$	729,025
Depreciation and amortization expense	90,926		98,858		97,732
Sale/transfer of real estate	(149,708)		(84,965)		(302,157)		(1)
Write-offs of tenant improvements	(228)		(603)		(1,406)
Write-offs of intangible assets(2)	(3,888)		(6,131)		(14,197)
Write-offs of fully depreciated assets	(5,608)		(2,301)		(26,370)
Balance at end of year	$	418,979	$	487,485	$	482,627

⁽¹⁾Includes the transfer of 100% of both University Circle and 333 Market Street to unconsolidated joint ventures, in which Columbia Property Trust currently owned a 55.0% interest as of December 31, 2019.

⁽²⁾Consists of write-offs of intangible lease assets related to lease restructurings, amendments, and terminations.

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Earnings Per Share

12 Months Ended

Dec. 31, 2019

Earnings Per Share [Abstract]

Earnings Per Share

Earnings Per Share

The basic and diluted earnings-per-share computations and net income have been reduced for the dividends paid on unvested shares related to the LTI Plan grants, as described in Note 8, Stockholders' Equity and Partner's Capital. The following table reconciles the numerator for the basic and diluted earnings-per-share computations shown on the consolidated statements of income (in thousands):

	2019		2018		2017
Net income attributable to common stockholders	$	9,197	$	9,491	$	176,041
Distributions paid on unvested shares	(310)		(296)		(337)
Net income attributable to common stockholders used to calculate basic and diluted earnings per share	$	8,887	$	9,195	$	175,704

The following table reconciles the denominator for the basic and diluted earnings-per-share computations shown on the consolidated statements of income (in thousands):

	2019	2018	2017
Weighted-average common shares – basic	116,261	117,888	120,795
Plus Incremental Weighted-Average Shares from Time-Vested Conversions Less Assumed Share Repurchases:
Previously granted LTI Plan awards, unvested	114	104	116
Future LTI Plan awards	83	319	248
Weighted-average common shares – diluted	116,458	118,311	121,159

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Leases - Summary of Impact of Operating Leases on Consolidated Balance Sheet (Details) $ in Thousands	Dec. 31, 2019 USD ($)
Lessee, Lease, Description [Line Items]
Operating lease assets	$ 29,470
Operating lease liabilities	2,186
Ground Leases
Lessee, Lease, Description [Line Items]
Operating lease assets	27,843
Operating lease liabilities	0
Office Lease
Lessee, Lease, Description [Line Items]
Operating lease assets	1,627
Operating lease liabilities	$ 2,186

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Consolidated Statements of Capital - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Jan. 01, 2018
Increase (Decrease) in Partners' Capital [Roll Forward]
Net income	$ 9,064	$ 9,491	$ 176,041
Market value adjustment to interest rate swaps	(3,445)	1,441	1,786
Columbia Property Trust Operating Partnership, L.P.
Increase (Decrease) in Partners' Capital [Roll Forward]
Beginning balance	2,369,714	1,996,020	1,768,862
Cumulative-effect adjustment for the adoption of ASU				$ 357,755
Contributions	17,663	177,833	296,083
Distributions	(136,420)	(167,551)	(234,241)
Net income	12,901	4,216	163,530
Market value adjustment to interest rate swaps	(3,445)	1,441	1,786
Ending balance	2,260,413	2,369,714	1,996,020
Columbia Property Trust, Inc.
Increase (Decrease) in Partners' Capital [Roll Forward]
Contributions	12,053
Columbia Property Trust, Inc. | Columbia Property Trust Operating Partnership, L.P.
Increase (Decrease) in Partners' Capital [Roll Forward]
Beginning balance	2,369,714	1,996,020	1,768,862
Cumulative-effect adjustment for the adoption of ASU				$ 357,755
Contributions		177,833	296,083
Distributions	(136,420)	(167,551)	(234,241)
Net income	13,034	4,216	163,530
Market value adjustment to interest rate swaps	(3,445)	1,441	1,786
Ending balance	2,254,936	2,369,714	1,996,020
Noncontrolling Interests | Columbia Property Trust Operating Partnership, L.P.
Increase (Decrease) in Partners' Capital [Roll Forward]
Beginning balance	0	0	0
Contributions	5,610
Net income	(133)
Ending balance	$ 5,477	$ 0	$ 0

XML

Label	Element	Value
Accounting Standards Update 2017-05 [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	$ 357,755,000
Accounting Standards Update 2017-05 [Member] | Parent [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	357,755,000
Accounting Standards Update 2017-05 [Member] | Accumulated Distributions in Excess of Net Income [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	357,755,000
Accounting Standards Update 2014-09 [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	343,000
Accounting Standards Update 2014-09 [Member] | Parent [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	343,000
Accounting Standards Update 2014-09 [Member] | Accumulated Distributions in Excess of Net Income [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	$ 343,000

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Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenues:
Operating Lease, Lease Income	$ 276,149	$ 283,252	$ 280,570
Total revenue	288,837	297,943	289,000
Expenses:
Depreciation	78,292	81,795	80,394
Amortization	27,908	32,554	32,403
Impairment loss on real estate assets	43,941	30,812	0
General and administrative expense - corporate	32,779	32,979	34,966
General and administrative – joint venture	3,567	3,108	1,454
Pre-acquisition costs (Note 16)	6,398	0	0
Costs and expenses	286,789	270,915	240,029
Other Income (Expense):
Interest expense	(43,170)	(56,499)	(60,516)
Gain (loss) on extinguishment of debt	0	23,340	(325)
Interest and other income	173	6,894	9,529
Gain on sale of unconsolidated joint venture interests	0	762	0
Income tax benefit (expense)	(21)	(37)	213
Income from unconsolidated joint ventures	8,004	8,003	2,651
Gains on sales of real estate assets	42,030	0	175,518
Nonoperating income (expense)	7,016	(17,537)	127,070
Net income	9,064	9,491	176,041
Less: net loss attributable to non-controlling interest in consolidated joint venture	133	0	0
Net income attributable to common stockholders	$ 9,197	$ 9,491	$ 176,041
Per-Share Information – Basic:
Net income attributable to common stockholders (in dollars per share)	$ 0.08	$ 0.08	$ 1.45
Weighted-average common shares outstanding – basic (in shares)	116,261	117,888	120,795
Per-Share Information – Diluted:
Net income attributable to common stockholders (in dollars per share)	$ 0.08	$ 0.08	$ 1.45
Weighted-average common shares – diluted (in shares)	116,458	118,311	121,159
Hotel income/operating costs
Revenues:
Revenue	$ 0	$ 0	$ 1,339
Expenses:
Cost of goods and services sold	0	0	2,089
Asset and property management fee income/expenses
Revenues:
Revenue	7,544	7,384	3,782
Expenses:
Cost of goods and services sold	629	854	918
Other property income
Revenues:
Revenue	5,144	7,307	3,309
Property operating costs
Expenses:
Cost of goods and services sold	93,275	88,813	87,805
Columbia Property Trust Operating Partnership, L.P.
Revenues:
Operating Lease, Lease Income	248,838	254,988	252,149
Total revenue	248,937	256,311	251,540
Expenses:
Depreciation	67,773	71,934	72,010
Amortization	26,663	31,451	31,035
Impairment loss on real estate assets	43,941	30,812	0
General and administrative expense - corporate	7,927	9,469	9,232
General and administrative – joint venture	43	0	0
Pre-acquisition costs (Note 16)	4,160	0	0
Costs and expenses	236,664	225,048	193,973
Other Income (Expense):
Interest expense	(49,470)	(66,046)	(73,877)
Gain (loss) on extinguishment of debt	0	23,340	(325)
Interest and other income	64	6,894	6,784
Gain on sale of unconsolidated joint venture interests	0	762	0
Income tax benefit (expense)	0	0	(3)
Income from unconsolidated joint ventures	8,004	8,003	2,651
Gains on sales of real estate assets	42,030	0	170,733
Nonoperating income (expense)	628	(27,047)	105,963
Net income	12,901	4,216	163,530
Less: net loss attributable to non-controlling interest in consolidated joint venture	133	0	0
Net income attributable to common stockholders	13,034	4,216	163,530
Columbia Property Trust Operating Partnership, L.P. | Asset and property management fee income/expenses
Expenses:
Cost of goods and services sold	3,952	3,856	3,977
Columbia Property Trust Operating Partnership, L.P. | Other property income
Revenues:
Revenue	99	1,323	(609)
Columbia Property Trust Operating Partnership, L.P. | Property operating costs
Expenses:
Cost of goods and services sold	$ 82,205	$ 77,526	$ 77,719

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Stockholders' Equity and Partner's Capital - Summary of Incurred Stock-Based Compensation Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ 6,622	$ 6,966	$ 7,580
Future employee awards	2,720	2,461	2,509
Employees
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	3,282	3,800	4,098
Director
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ 620	$ 705	$ 973

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Commitments and Contingencies (Lease Obligations) (Details) - USD ($)		1 Months Ended	12 Months Ended
	Oct. 03, 2018	Jan. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Corporate Joint Venture
Loss Contingencies [Line Items]
Capital calls payable				$ 0
Guaranty liability				$ 0
Corporate Joint Venture | 799 Broadway Joint Venture
Loss Contingencies [Line Items]
Proceeds from construction loan	$ 97,000,000.0		$ 113,200,000
799 Broadway Joint Venture | Corporate Joint Venture
Loss Contingencies [Line Items]
Aggregate additional equity contributions			15,800,000
799 Broadway Joint Venture | Corporate Joint Venture | Normandy And Columbia Property Trust
Loss Contingencies [Line Items]
Aggregate additional equity contributions			31,900,000
149 Madison Avenue
Loss Contingencies [Line Items]
Tenant obligation			17,500,000
95 Columbus
Loss Contingencies [Line Items]
Tenant obligation			$ 17,900,000
80 M Street | Capital Addition Purchase Commitments | Subsequent Event
Loss Contingencies [Line Items]
Required funding amount related to construction and tenant improvement allowances		$ 70,000,000.0

XML

Summary of Significant Accounting Policies - Schedule of Intangible Assets & Liabilities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Intangible Lease Assets
Intangible lease assets, accumulated amortization	$ (58,659)	$ (84,881)
Intangible lease origination costs, accumulated amortization	(33,731)	(65,348)
Intangible lease assets, net	61,025	98,540
Intangible lease origination costs, net	27,971	34,092
Intangible Below-Market In-Place Lease Liabilities
Intangible below-market in-place lease liabilities, gross	36,966	42,847
Intangible below-market in-place lease liabilities, accumulated amortization	(15,127)	(21,766)
Below market lease, net	21,839	21,081
Amortization of intangible lease assets
Amortization of intangible lease assets	27,908	32,554	$ 32,403
Amortization of below market lease liabilities	5,395	6,851	6,883
Above-Market In-Place Lease Assets
Intangible Lease Assets
Intangible lease assets, gross	2,481	3,174
Intangible lease assets, accumulated amortization	(1,202)	(1,060)
Intangible lease assets, net	1,279	2,114
Amortization of intangible lease assets
Amortization of intangible lease assets	288	228	519
Absorption Period Costs
Intangible Lease Assets
Intangible lease assets, gross	117,203	147,668
Intangible lease assets, accumulated amortization	(57,457)	(81,220)
Intangible lease assets, net	59,746	66,448
Amortization of intangible lease assets
Amortization of intangible lease assets	13,511	17,137	16,807
Intangible Lease Origination Costs
Intangible Lease Assets
Intangible lease origination costs, gross	61,702	99,440
Intangible lease origination costs, accumulated amortization	(33,731)	(65,348)
Intangible lease origination costs, net	27,971	34,092
Amortization of intangible lease assets
Amortization of intangible lease assets	$ 7,398	$ 9,660	$ 10,124

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Real Estate Transactions - Narrative (Details) ft² in Thousands								1 Months Ended		3 Months Ended	12 Months Ended
	Dec. 09, 2019 USD ($) ft² Tenant	Dec. 02, 2019 USD ($) ft²	Oct. 24, 2018 USD ($) ft²	Oct. 03, 2018 USD ($) ft²	Nov. 28, 2017 USD ($) ft²	Oct. 11, 2017 USD ($) ft² Tenant	Jul. 06, 2017 USD ($) ft²	Dec. 31, 2019 USD ($) ft²	Dec. 31, 2017 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2019 USD ($) ft²	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Business Acquisition [Line Items]
Square feet of space | ft²								7,300			7,300
Payments to acquire real estate											$ 453,128,000	$ 23,034,000	$ 604,769,000
Purchase price of joint venture											17,134,000	38,763,000	369,043,000
Real estate assets transferred to unconsolidated joint venture											0	$ 0	$ 558,122,000
201 California Street
Business Acquisition [Line Items]
Square feet of space | ft²	252
Percent leased	99.00%
Ownership percentage	100.00%
Number of tenants | Tenant	34
Revenue of acquiree since acquisition date								$ 1,400,000
Earnings (loss) of acquiree since acquisition date								$ 100,000
Payments to acquire real estate	$ 238,900,000
101 Franklin Street
Business Acquisition [Line Items]
Square feet of space | ft²		235
Ownership percentage		92.50%
Earnings (loss) of acquiree since acquisition date											$ 37,000
Payments to acquire real estate		$ 205,500,000
Lindbergh Center – Retail
Business Acquisition [Line Items]
Ownership percentage			100.00%
Payments to acquire real estate			$ 23,000,000
149 Madison Avenue
Business Acquisition [Line Items]
Ownership percentage					100.00%
Revenue of acquiree since acquisition date									$ 10,300
Earnings (loss) of acquiree since acquisition date									$ 9,200
Payments to acquire real estate					$ 87,700,000
249 West 17th Street
Business Acquisition [Line Items]
Percent leased						100.00%
Number of tenants | Tenant						4
Revenue of acquiree since acquisition date										$ 5,900,000
Earnings (loss) of acquiree since acquisition date										1,800,000
218 West 18th Street
Business Acquisition [Line Items]
Percent leased						100.00%
Number of tenants | Tenant						7
Revenue of acquiree since acquisition date										3,000,000.0
Earnings (loss) of acquiree since acquisition date										$ 800,000
Ancillary Retail And Office Building | Lindbergh Center – Retail
Business Acquisition [Line Items]
Square feet of space | ft²			147
Office Building | 149 Madison Avenue
Business Acquisition [Line Items]
Square feet of space | ft²					127
Office Building | 249 West 17th Street
Business Acquisition [Line Items]
Square feet of space | ft²						281
Office Building | 218 West 18th Street
Business Acquisition [Line Items]
Square feet of space | ft²						166
Customer concentration risk | First Republic Bank | 201 California Street
Business Acquisition [Line Items]
Concentration risk percentage	13.00%
Customer concentration risk | Dow Jones & Company, Inc. | 201 California Street
Business Acquisition [Line Items]
Concentration risk percentage	12.00%
Customer concentration risk | Cooper, White & Cooper, LLP | 201 California Street
Business Acquisition [Line Items]
Concentration risk percentage	12.00%
Customer concentration risk | Twitter | 249 West 17th Street
Business Acquisition [Line Items]
Concentration risk percentage						76.00%
Customer concentration risk | Room & Board | 249 West 17th Street
Business Acquisition [Line Items]
Concentration risk percentage						21.00%
Customer concentration risk | Red Bull North America | 218 West 18th Street
Business Acquisition [Line Items]
Concentration risk percentage						25.00%
Customer concentration risk | Company 3 | 218 West 18th Street
Business Acquisition [Line Items]
Concentration risk percentage						18.00%
Customer concentration risk | SY Partners | 218 West 18th Street
Business Acquisition [Line Items]
Concentration risk percentage						16.00%
Customer concentration risk | SAE | 218 West 18th Street
Business Acquisition [Line Items]
Concentration risk percentage						16.00%
Corporate Joint Venture | 799 Broadway Joint Venture
Business Acquisition [Line Items]
Ownership percentage				49.70%				49.70%			49.70%
Purchase price of joint venture				$ 30,200,000
Corporate Joint Venture | 799 Broadway Joint Venture | Office Building
Business Acquisition [Line Items]
Square feet of space | ft²				182
Corporate Joint Venture | 1800 M Street Joint Venture
Business Acquisition [Line Items]
Percent leased						94.00%
Ownership percentage						55.00%		55.00%			55.00%
Payments to acquire real estate						$ 421,000,000.0
Purchase price of joint venture						$ 231,550,000
Corporate Joint Venture | 1800 M Street Joint Venture | Office Building
Business Acquisition [Line Items]
Square feet of space | ft²						581
Corporate Joint Venture | 114 Fifth Avenue
Business Acquisition [Line Items]
Square feet of space | ft²							352
Percent leased							100.00%
Ownership percentage							49.50%	49.50%			49.50%
Purchase price of joint venture							$ 108,900,000
Corporate Joint Venture | 799 Broadway Joint Venture
Business Acquisition [Line Items]
Proceeds from construction loan				$ 97,000,000.0							$ 113,200,000
Corporate Joint Venture | Normandy | 799 Broadway Joint Venture
Business Acquisition [Line Items]
Real estate assets transferred to unconsolidated joint venture				145,500,000
Corporate Joint Venture | Allianz | 1800 M Street Joint Venture
Business Acquisition [Line Items]
Ownership percentage						45.00%
Corporate Joint Venture | Allianz | 114 Fifth Avenue
Business Acquisition [Line Items]
Ownership percentage							49.50%
Corporate Joint Venture | L & L Holding Company | 114 Fifth Avenue
Business Acquisition [Line Items]
Ownership percentage							1.00%
Construction Loan Payable | Corporate Joint Venture | 799 Broadway Joint Venture
Business Acquisition [Line Items]
Line of credit facility, maximum borrowing capacity				$ 187,000,000.0

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Summary of Significant Accounting Policies (Policies)

12 Months Ended

Dec. 31, 2019

Accounting Policies [Abstract]

Basis of Presentation

Basis of Presentation

The accompanying consolidated financial statements are prepared in conformity with accounting principles generally accepted in the United States of America ("GAAP"), which require us to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting periods. Actual results could differ from those estimates.

Columbia Property Trust's consolidated financial statements include the accounts of Columbia Property Trust, Columbia OP, and their consolidated subsidiaries. Columbia OP's consolidated financial statements include the accounts of Columbia OP, and its consolidated subsidiaries. We consolidate any variable interest entity ("VIE") in which we are deemed the primary beneficiary. With respect to entities that are not VIEs, our consolidated financial statements also include the accounts of any entity in which we own a controlling financial interest, and any limited partnership in which we own a controlling general partnership interest. In determining whether Columbia Property Trust or Columbia OP owns a controlling interest, the following factors are considered, among other things: the ownership of voting interests, protective rights, and participatory rights of the investors.

All intercompany balances and transactions have been eliminated in consolidation.

Use of Estimates

Use of Estimates

The preparation of the consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported in the accompanying consolidated financial statements and the accompanying notes. Actual results could differ from those estimates.

Fair Value Measurements

Fair Value Measurements

Columbia Property Trust estimates the fair value of its assets and liabilities (where currently required under GAAP) consistent with the provisions of Accounting Standard Codification 820, Fair Value Measurements ("ASC 820"). Under this standard, fair value is defined as the price that would be received upon sale of an asset or paid upon transfer of a liability in an orderly transaction between market participants at the measurement date. While

various techniques and assumptions can be used to estimate fair value depending on the nature of the asset or liability, the accounting standard for fair value measurements and disclosures provides the following fair value technique parameters and hierarchy, depending upon availability:

Level 1 – Assets or liabilities for which the identical term is traded on an active exchange, such as publicly traded instruments or futures contracts.

Level 2 – Assets and liabilities valued based on observable market data for similar instruments.

Level 3 – Assets or liabilities for which significant valuation assumptions are not readily observable in the market. Such assets or liabilities are valued based on the best available data, some of which may be internally developed. Significant assumptions may include risk premiums that a market participant would consider.

Real Estate Assets

Real Estate Assets

Real estate assets are stated at cost, less accumulated depreciation and amortization. Amounts capitalized to real estate assets consist of the cost of acquisition or construction, and any tenant improvements or major improvements that extend the useful life of the related asset. All repairs and maintenance costs are expensed as incurred.

Columbia Property Trust is required to make subjective assessments as to the useful lives of its depreciable assets. To determine the appropriate useful life of an asset, Columbia Property Trust considers the period of future benefit of the asset. These assessments have a direct impact on net income.

Assets Held for Sale

Assets Held for Sale

Columbia Property Trust classifies properties as held for sale according to Accounting Standard Codification 360, Accounting for the Impairment or Disposal of Long-Lived Assets ("ASC 360"). According to ASC 360, properties having separately identifiable operations and cash flows, are considered held for sale when the following criteria are met:

•Management, having the authority to approve the action, commits to a plan to sell the property.

•The property is available for immediate sale in its present condition, subject only to terms that are usual and customary for sales of such property.

•An active program to locate a buyer and other actions required to complete the plan to sell the property have been initiated.

•The property is being actively marketed for sale at a price that is reasonable in relation to its current fair value.

•Actions required to complete the plan indicate that it is unlikely that significant changes to the plan will be made or that the plan will be withdrawn.

•The sale of the property is probable and transfer of the property is expected to qualify for recognition as a completed sale, within one year.

At such time that a property is determined to be held for sale, its carrying amount is adjusted to the lower of its depreciated book value or its estimated fair value, less costs to sell, and depreciation is no longer recognized; and assets and liabilities are required to be classified as held for sale on the accompanying consolidated balance sheet.

Evaluating the Recoverability of Real Estate Assets

Evaluating the Recoverability of Real Estate Assets

Columbia Property Trust continually monitors events and changes in circumstances that could indicate that the net carrying amounts of its real estate and related intangible assets and liabilities, of both operating properties and properties under redevelopment, may not be recoverable. When indicators of potential impairment are present that suggest that the net carrying amounts of real estate assets and related intangible assets and liabilities may not be recoverable, Columbia Property Trust assesses the recoverability of these net assets by determining whether the respective carrying values will be recovered through the estimated undiscounted future cash flows expected from the use of the net assets and their eventual disposition. In the event that such expected undiscounted future cash flows do not exceed the carrying values, Columbia Property Trust adjusts the carrying values of the real estate assets and related intangible assets and liabilities to the estimated fair values, pursuant to the property, plant, and equipment accounting standard for the impairment or disposal of long-lived assets, and recognizes an impairment loss. At such time that a property is required to be classified as held for sale, its net carrying amount is adjusted to the lower of its depreciated book value or its estimated fair value, less costs to sell, and depreciation is no longer recognized.

Estimated fair values are calculated based on the following hierarchy of information: (i) recently quoted market prices, (ii) market prices for comparable properties, or (iii) the present value of future cash flows, including estimated residual value. Projections of expected future operating cash flows require that Columbia Property Trust estimate future market rental income amounts subsequent to the expiration of current lease agreements, property operating expenses, the number of months it takes to re-lease the property, and the number of years the property is held for investment, among other factors. Due to the inherent subjectivity of the assumptions used to project future cash flows, estimated fair values may differ from the values that would be realized in market transactions. Certain of

Columbia Property Trust's assets may be carried at an amount that exceeds that which could be realized in a current disposition transaction.

Allocation of Purchase Price of Acquired Assets

Allocation of Purchase Price of Acquired Assets

Upon the acquisition of real properties, Columbia Property Trust allocates the purchase price of properties and related transaction costs to tangible assets, consisting of land, building, site improvements, and identified intangible assets and liabilities, including the value of in-place leases, based in each case on Columbia Property Trust's estimate of their fair values in accordance with ASC 820 (see "Fair Value Measurements" section above for additional details). In conjunction with certain acquisitions, Columbia Property Trust has entered into master lease agreements, which obligate the seller to pay rent pertaining to certain nonrevenue-producing spaces to mitigate the negative effects of lower rental revenues. Columbia Property Trust records payments receivable under such master lease agreements as a reduction of the property basis rather than income. Columbia Property Trust received no proceeds for master leases during 2019, 2018, or 2017.

The fair values of the tangible assets of an acquired property (which includes land, building, and site improvements) are determined by valuing the property as if it were vacant, and the "as-if-vacant" value is then allocated to land, building, and site improvements based on management's determination of the relative fair value of these assets. Management determines the as-if-vacant fair value of a property using methods similar to those used by independent appraisers. Factors considered by management in performing these analyses include an estimate of carrying costs during the expected lease-up periods considering current market conditions and costs to execute similar leases, including leasing commissions and other related costs. In estimating carrying costs, management includes real estate taxes, insurance, and other operating expenses during the expected lease-up periods based on current market demand.

Intangible Assets and Liabilities Arising From In-Place Leases Where Columbia Property Trust Is the Lessor

Intangible Assets and Liabilities Arising From In-Place Leases Where Columbia Property Trust Is the Lessor

As further described below, in-place leases with Columbia Property Trust as the lessor may have values related to direct costs associated with obtaining a new tenant that are avoided for in-place leases, opportunity costs associated with lost rentals that are avoided by acquiring an in-place lease, tenant relationships, and effective contractual rental rates that are above or below market:

•Direct costs associated with obtaining a new tenant that are avoided for in-place leases, including commissions, tenant improvement allowances, and other direct costs, are estimated based on management's consideration of current market costs to execute a similar lease. Such direct costs are included in intangible lease origination costs in the accompanying consolidated balance sheets and are amortized to expense over the remaining terms of the respective leases.

•The value of opportunity costs associated with lost rentals avoided by acquiring an in-place lease is calculated based on contractual amounts to be paid pursuant to the in-place leases over a market absorption period for a similar lease. Such opportunity costs ("Absorption Period Costs") are included in intangible lease assets in the accompanying consolidated balance sheets and are amortized to expense over the remaining terms of the respective leases.

•The value of effective rental rates of in-place leases that are above or below the market rates of comparable leases is calculated based on the present value (using a discount rate that reflects the risks associated with the leases acquired) of the difference between (i) the contractual amounts to be received pursuant to the in-place leases and (ii) management's estimate of fair market lease rates for the corresponding in-place leases. This calculation includes significantly below-market renewal options for which exercise of the renewal option appears to be reasonably assured. These intangible assets or liabilities are measured over the actual or assumed (in the case of renewal options) remaining lease terms. The capitalized above-market and below-market lease values are recorded as intangible lease assets or liabilities and amortized as an adjustment to rental income over the remaining terms of the respective leases.

Cash and Cash Equivalents

Cash and Cash EquivalentsColumbia Property Trust considers all highly liquid investments purchased with an original maturity of three months or less to be cash equivalents. Cash equivalents may include cash and short-term investments. Short-term investments are stated at cost, which approximates fair value as of December 31, 2019 and 2018.

Tenant Receivables

Tenant ReceivablesTenant receivables consist of rental and reimbursement billings due from tenants. Tenant receivables are recorded at the original amount earned, which approximates fair value. Management assesses the realizability of tenant receivables on an ongoing basis, and, if at any point during the term of a lease it is determined that the collectability of a tenant receivable is not probable, such receivable is written off against lease revenues

Straight-Line Rent Receivable

Straight-Line Rent Receivable

Straight-line rent receivable reflects the amount of cumulative adjustments necessary to present rental income on a straight-line basis. Columbia Property Trust recognizes rental revenues on a straight-line basis, ratably over the term of each lease; however, leases often provide for payment terms that differ from the revenue recognized. When the amount of cash billed is less than the amount of revenue recognized, typically early in the lease, straight-line rent receivable is recorded for the difference. The receivable is depleted during periods later in the lease when the amount of cash paid by the tenant is greater than the amount of revenue recognized.

Prepaid Expenses and Other Assets

Prepaid Expenses and Other Assets

Prepaid expenses and other assets primarily include earnest money deposits, escrow accounts held by lenders to pay future real estate taxes, insurance and tenant improvements, notes receivable, nontenant receivables, prepaid taxes, insurance and operating costs, unamortized deferred financing costs related to the line of credit (the "Revolving Credit Facility"), interest rate swaps (when in an asset position), certain corporate assets, and deferred tax assets. Prepaid expenses are recognized over the period to which the good or service relates. Other assets are written off when the asset no longer has future value, or when the company is no longer obligated for the corresponding liability.

Deferred Lease Costs

Deferred Lease CostsDeferred lease costs include costs incurred to procure leases that are paid to third parties or tenants, and incentives that are provided to tenants under the terms of their leases. These costs are capitalized and amortized on a straight-line basis over the terms of the lease. Amortization of third-party leasing costs is reflected as amortization expense, and amortization of lease incentives is reflected as an adjustment to rental income.

Accounts Payable, Accrued Expenses, and Accrued Capital Expenditures

Accounts Payable, Accrued Expenses, and Accrued Capital ExpendituresAccounts payable, accrued expenses, and accrued capital expenditures primarily include payables related to property operations, capital projects, and interest rate swaps (when in a liability position).

Deferred Financing Costs/Line of Credit and Notes Payable and Bonds Payable

Deferred Financing CostsDeferred financing costs include costs incurred to secure debt from third-party lenders. Deferred financing costs, except for costs related to the Revolving Credit Facility, are presented as a direct reduction to the carrying amount of the related debt for all periods presented. Deferred financing costs related to the Revolving Credit Facility are included in prepaid expenses and other assets.

Line of Credit and Notes Payable

When debt is assumed, Columbia Property Trust records the loan at fair value. The fair value adjustment is amortized to interest expense over the term of the loan using the effective interest method. As described in the "Deferred Financing Costs" section above, line of credit and notes payable is presented on the accompanying consolidated balance sheet net of deferred financing costs related to term loans and notes payable of $2.1 million and $2.7 million as of December 31, 2019 and December 31, 2018, respectively.

Bonds Payable

Columbia OP has two series of bonds outstanding as of December 31, 2019 and 2018: $350 million of its 10-year unsecured 3.650% senior notes issued at 99.626% of their face value (the "2026 Bonds Payable"); and $350.0 million of its 10-year unsecured 4.150% senior notes issued at 99.859% of their face value (the "2025 Bonds Payable"). The discount on the 2026 Bonds Payable and the 2025 Bonds Payable is amortized to interest expense over the term of the bonds using the effective-interest method.

Preferred Stock, Common Stock and Distributions

Preferred Stock

Columbia Property Trust is authorized to issue up to 100.0 million shares of one or more classes or series of preferred stock with a par value of $0.01 per share. Columbia Property Trust's board of directors may determine the relative rights, preferences, and privileges of each class or series of preferred stock issued, which may be more beneficial than the rights, preferences, and privileges attributable to Columbia Property Trust's common stock. To date, Columbia Property Trust has not issued any shares of preferred stock.

Common Stock

The par value of Columbia Property Trust's issued and outstanding shares of common stock is classified as common stock, with the remainder allocated to additional paid-in capital.

Distributions

To maintain its status as a REIT, Columbia Property Trust is required by the Internal Revenue Code of 1986, as amended (the "Code"), to make distributions to stockholders each taxable year equal to at least 90% of its REIT taxable income, computed without regard to the dividends-paid deduction and by excluding net capital gains attributable to stockholders ("REIT taxable income"). To the extent that Columbia Property Trust satisfies the distribution requirement but distributes less than 100% of its REIT taxable income, Columbia Property Trust would be subject to federal and state corporate income tax on the undistributed income. Distributions to the stockholders are determined by the board of directors of Columbia Property Trust and are dependent upon a number of factors relating to Columbia Property Trust, including funds available for payment of distributions, financial condition, the timing of property acquisitions, capital expenditure requirements, and annual distribution requirements in order to maintain Columbia Property Trust's status as a REIT under the Code.

Noncontrolling interests

Noncontrolling InterestsNoncontrolling interests represent the equity interests of a consolidated joint venture that are not owned by Columbia Property Trust. Noncontrolling interests are adjusted for contributions, distributions, and earnings attributable to the noncontrolling interest holders of the consolidated joint venture. Earnings are allocated to joint venture partners using the hypothetical liquidation at book value method, based on the terms of the respective joint venture agreements, and are recorded as net income (loss) attributable to noncontrolling interests in the accompanying consolidated statements of operations.

Interest Rate Swap Agreements

Interest Rate Swap Agreements

Columbia Property Trust enters into interest rate swap contracts to mitigate its interest rate risk on the related financial instruments. Columbia Property Trust does not enter into derivative or interest rate transactions for speculative purposes and currently does not have any derivatives that are not designated as hedges; however, certain of its derivatives may, at times, not qualify for hedge accounting treatment. Columbia Property Trust records the fair value of its interest rate swaps on its consolidated balance sheet either as prepaid expenses and other assets or as accounts payable, accrued expenses, and accrued capital expenditures. Changes in the fair value of interest rate swaps that are designated as cash flow hedges are recorded as other comprehensive income (loss). Changes in the fair value of interest rate swaps that do not qualify for hedge accounting treatment are recorded as gain or loss on interest rate swaps. Amounts received or paid under interest rate swap agreements are recorded as interest expense for contracts that qualify for hedge accounting treatment and as loss on interest rate swaps for contracts

that do not qualify for hedge accounting treatment. As of December 31, 2019, Columbia Property Trust has two interest rate swaps, with an aggregate notional amount of $450.0 million.

Revenue Recognition

Revenue Recognition

The majority of Columbia Property Trust’s revenues are derived from leases and are reflected as lease revenues on the accompanying consolidated statements of operations. For more information about Columbia Property Trust's lease revenue streams see Note 10, Leases.

In determining when to begin recognizing rental revenues, Columbia Property Trust considers a number of factors, including the nature of the physical improvements made in connection with the lease. When Columbia Property Trust owns the improvements for accounting purposes, revenue recognition generally begins once the improvements are substantially complete and the lessee has taken possession of the improved space. When Columbia Property Trust does not own the improvements for accounting purposes (the lessee is the owner), revenue recognition generally begins once the lessee takes possession of the unimproved space; in these instances, the tenant allowance is accounted for as a lease incentive, which reduces rental revenues over the lease term. When evaluating which party (lessee or lessor) owns the improvements for accounting purposes, Columbia Property Trust considers a number of factors, including, among other things: whether the lease stipulates what the tenant allowance may be used for; whether the lessee or lessor retains legal title to the improvements; the expected economic life of the improvements relative to the lease term; and who directs the construction of the improvements. The determination of who owns the improvements for accounting purposes is subject to significant judgement and is not based on any one factor.

Income Taxes

Income Taxes

Columbia Property Trust has elected to be taxed as a REIT under the Code, as amended (the "Code") and has operated as such beginning with its taxable year ended December 31, 2003. To qualify as a REIT, Columbia Property Trust must meet certain organizational and operational requirements, including a requirement to distribute at least 90% of its REIT taxable income, as defined by the Code, to its stockholders. To the extent that Columbia Property Trust satisfies the distribution requirement but distributes less than 100% of its REIT taxable income, Columbia

Property Trust would be subject to federal and state corporate income tax on the undistributed income. Generally, Columbia Property Trust does not incur federal income taxes, other than as described in the following paragraph, because its stockholder distributions typically exceed its taxable income due to noncash expenses such as depreciation. Columbia Property Trust is, however, subject to certain state and local taxes related to the operations of properties in certain locations, which have been provided for in the accompanying consolidated financial statements.

Columbia Property Trust TRS, LLC, Columbia KCP TRS, LLC, and Columbia Energy TRS, LLC (collectively, the "TRS Entities") are wholly owned subsidiaries of Columbia Property Trust and are organized as Delaware limited liability companies. The TRS Entities, among other things, provide tenant services that Columbia Property Trust, as a REIT, cannot otherwise provide. Columbia Property Trust has elected to treat the TRS Entities as taxable REIT subsidiaries. Columbia Property Trust may perform certain additional, noncustomary services for tenants of its buildings through the TRS Entities; however, any earnings related to such services are subject to federal and state income taxes. In addition, for Columbia Property Trust to continue to qualify as a REIT, Columbia Property Trust must limit its investments in taxable REIT subsidiaries to 20% of the value of the total assets. The TRS Entities' deferred tax assets and liabilities represent temporary differences between the financial reporting basis and the tax basis of assets and liabilities based on the enacted rates expected to be in effect when the temporary differences reverse. If applicable, Columbia Property Trust records interest and penalties related to uncertain tax positions as general and administrative expense in the accompanying consolidated statements of operations.

Segment Information

Segment Information

As of December 31, 2019, Columbia Property Trust's reportable segments are determined based on the geographic markets in which it has significant investments. Columbia Property Trust considers geographic location when evaluating its portfolio composition, and in assessing the ongoing operations and performance of its properties (see Note 15, Segment Information).

Reclassification

ReclassificationIn accordance with Accounting Standard Codification 360, Property, Plant, and Equipment ("ASC 360"), and in response to the Securities and Exchange Commission's Disclosure Update and Simplification release effective November 5, 2018, gains on sales of real estate assets have been moved to other income (expense) on the consolidated statements of operations for all periods presented.

Recent Accounting Pronouncements

Recent Accounting Pronouncements

Effective January 1, 2019, Columbia Property Trust adopted Accounting Standard Codification 842, Leases ("ASC 842"), which amends the lease accounting rules with the following key changes:

•Lessees are required to record a right-of-use asset and a lease liability for all leases, as defined, with a term of greater than 12 months, and to classify such leases as either finance or operating leases based on the principle of whether or not the lease is effectively a financed purchase of the leased asset by the lessee, or not. This classification will determine whether the lease expense is recognized using the effective interest method (finance leases) or on a straight-line basis over the term of the lease (operating leases).

•Lessors are required to account for leases using an approach that is substantially similar to the pre-existing rules for operating leases, sales-type leases, and direct financing leases, with a few targeted changes, including that: (i) lessors are no longer permitted to capitalize and amortize initial indirect costs incurred to obtain a lease, and (ii) provisions for uncollectible tenant receivables are reflected as a reduction to lease revenues, instead of as general and administrative expense.

In connection with transitioning to ASC 842, Columbia Property Trust elected to use certain practical expedients which impact Columbia Property Trust as follows:

•Prospective implementation. In-place contracts retain their character as to whether they meet the definition of a lease or not; in-place leases retain their classification as an operating, sales-type, or direct financing lease; and prior-period accounting and presentation is unchanged.

•Rental income and tenant reimbursements for operating leases are combined in a single line on the statements of operations for all periods presented.

•Leases with a term of 12 months or less are expensed as incurred, as provided for in a practical expedient elected by Columbia Property Trust.

See Note 10, Leases, for additional information.

Accounting Standard Update 2018-13, Fair Value Measurement: Disclosure Framework – Changes to the Disclosure Requirements for Fair Value Measurement ("ASU 2018-13"), which will be effective for Columbia Property Trust on January 1, 2020, expands the disclosure requirements related to a change in fair value technique hierarchy. ASU 2018-13 is not expected to have a material impact on Columbia Property Trust's consolidated financial statements or disclosures.

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Quarterly Results (Unaudited)

12 Months Ended

Dec. 31, 2019

Quarterly Financial Information Disclosure [Abstract]

Quarterly Results (Unaudited)

Quarterly Results (Unaudited)

Presented below is a summary of the unaudited quarterly financial information for the years ended December 31, 2019 and 2018 (in thousands, except per-share data):

	2019
	First Quarter		Second Quarter			Third Quarter			Fourth Quarter
Revenues	$	75,433	$	72,730		$	71,949		$	68,725
Net income (loss) attributable to common stockholders	$	3,513	$	47,747	(1)	$	(20,286)	(2)	$	(21,777)	(3)
Net income (loss) attributable to common stockholders per share – basic(4)	$	0.03	$	0.41		$	(0.17)		$	(0.19)
Net income (loss) attributable to common stockholders per share – diluted(4)	$	0.03	$	0.41		$	(0.17)		$	(0.19)
Dividends declared per share	$	0.20	$	0.20		$	0.20		$	0.21

	2018
	First Quarter		Second Quarter			Third Quarter		Fourth Quarter
Revenues	$	73,710	$	75,370		$	73,340	$	75,523
Net income (loss) attributable to common stockholders	$	1,498	$	(3,439)	(5)	$	6,429	$	5,003
Net income (loss) attributable to common stockholders – basic(4)	$	0.01	$	(0.03)		$	0.05	$	0.04
Net income (loss) attributable to common stockholders – diluted(4)	$	0.01	$	(0.03)		$	0.05	$	0.04
Dividends declared per share	$	0.20	$	0.20		$	0.20	$	0.20

⁽¹⁾Net income attributable to common stockholders for the second quarter of 2019 includes a gain on sale of real estate assets of $41.9 million, as described in Note 3, Real Estate Transactions.

⁽²⁾Net loss attributable to common stockholders for the third quarter of 2019 includes an impairment loss on real estate of $23.4 million related to sales of real estate assets, as described in Note 3, Real Estate Transactions.

⁽³⁾Net loss attributable to common stockholders for the third quarter of 2019 includes an impairment loss on real estate of $20.6 million related to sales of real estate assets, as described in Note 2, Summary of Significant Accounting Policies.

⁽⁴⁾Quarterly net income (loss) per share – basic and diluted is calculated based on quarterly basic and diluted weighted-average shares outstanding, respectively.

⁽⁵⁾Net loss attributable to common stockholders for the second quarter of 2018 includes an impairment loss on real estate of $30.8 million related to sales of real estate assets, as described in Note 3, Real Estate Transactions, and a gain on extinguishment of debt of $24.0 million, related to the settlement of a mortgage note, as described in Note 5, Line of Credit and Notes Payable.

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Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Net income	$ 9,064	$ 9,491	$ 176,041
Net income	9,197	9,491	176,041
Market value adjustment to interest rate swaps	(3,445)	1,441	1,786
Comprehensive income	5,619	10,932	177,827
Less: net loss attributable to non-controlling interest in consolidated joint venture	133	0	0
Comprehensive income attributable to common stockholders	5,752	10,932	177,827
Columbia Property Trust Operating Partnership, L.P.
Net income	12,901	4,216	163,530
Net income	13,034	4,216	163,530
Market value adjustment to interest rate swaps	(3,445)	1,441	1,786
Comprehensive income	9,456	5,657	165,316
Less: net loss attributable to non-controlling interest in consolidated joint venture	133	0	0
Comprehensive income attributable to common stockholders	$ 9,589	$ 5,657	$ 165,316

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Supplemental Disclosure of Noncash Investing and Financing Activities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Investment in real estate funded with other assets	$ 0	$ 617	$ 311
Deposits	0	0	10,000
Other assets assumed upon acquisition	6	259	1,014
Other liabilities assumed upon acquisition	137	664	268
Real estate assets transferred to unconsolidated joint venture	0	0	558,122
Other assets transferred to unconsolidated joint venture	0	0	43,700
Other liabilities transferred to unconsolidated joint venture	0	0	21,347
Extinguishment of 263 Shuman Boulevard mortgage note by transferring property to lender	0	49,000	0
Settlement of capital lease obligation with related development authority bonds	0	120,000	0
Amortization of net discounts on debt	180	180	180
Accrued investments in unconsolidated joint ventures	198	386	0
Accrued capital expenditures and deferred lease costs	12,944	15,145	25,069
Operating lease liability recorded at adoption of ASC 842	34,791
Accrued dividends payable	24,209	23,340	23,961
Market value adjustment to interest rate swaps designated as hedging instruments and included in other comprehensive income (loss)	(3,445)	1,441	1,786
Common stock issued to employees and directors, and amortized (net of income tax witholdings)	6,622	6,966	7,580
Non-cash contributions (distributions) from (to) Columbia Property Trust	(7,000)	165,900	(65,200)
Accounting Standards Update 2017-05 And 2014-09
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative-effect adjustment for the adoption of ASU	$ 0	$ 358,098	$ 0

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Stockholders' Equity and Partner's Capital - Narrative (Details) - USD ($)					12 Months Ended
	Jan. 01, 2020	Jan. 01, 2019	Jan. 01, 2018	Jan. 01, 2017	Dec. 31, 2019	Dec. 31, 2017	Dec. 31, 2016	Sep. 04, 2019	Dec. 31, 2018	May 31, 2017	Apr. 30, 2008
Class of Stock [Line Items]
Common stock, par value (in dollars per share)					$ 0.01				$ 0.01
Long Term Incentive Plan
Class of Stock [Line Items]
Shares authorized and reserved under the LTIP										4,800,000
Unrecognized compensation costs related to unvested awards					$ 9,500,000				$ 8,600,000
Time-based Stock Awards | Long Term Incentive Plan
Class of Stock [Line Items]
Granted (shares)		176,122	128,486			139,825
RSUs | Long Term Incentive Plan
Class of Stock [Line Items]
Performance period					3 years
Granted (shares)			176,702		256,384	193,219
Performance period						3 years	1 year
Stock Options | Director Stock Option Plan
Class of Stock [Line Items]
Shares authorized and reserved under the LTIP											25,000
Options expired (in shares)				1,375
Options outstanding (in shares)					0
Minimum
Class of Stock [Line Items]
Unrecognized compensation costs recognition period					1 year
Minimum | RSUs | Long Term Incentive Plan
Class of Stock [Line Items]
Shareholder payout (percent)					50.00%
Maximum
Class of Stock [Line Items]
Unrecognized compensation costs recognition period					4 years
Maximum | RSUs | Long Term Incentive Plan
Class of Stock [Line Items]
Shareholder payout (percent)					150.00%
36 months after grant date | RSUs | Long Term Incentive Plan
Class of Stock [Line Items]
Award vesting rights (percent)					75.00%
48 months after grant date | RSUs | Long Term Incentive Plan
Class of Stock [Line Items]
Stock units exercisable period after the date of grant					1 year
Award vesting rights (percent)					25.00%
Subsequent Event | Time-based Stock Awards | 2020 LTI Plan
Class of Stock [Line Items]
Stock units exercisable period after the date of grant	4 years
Granted (shares)	165,233
Subsequent Event | RSUs | Long Term Incentive Plan
Class of Stock [Line Items]
Performance period	3 years
Granted (shares)	246,387
Subsequent Event | 36 months after grant date | RSUs | Long Term Incentive Plan
Class of Stock [Line Items]
Award vesting rights (percent)	75.00%
Subsequent Event | 48 months after grant date | RSUs | Long Term Incentive Plan
Class of Stock [Line Items]
Stock units exercisable period after the date of grant	1 year
Award vesting rights (percent)	25.00%
Common Stock | Long Term Incentive Plan
Class of Stock [Line Items]
Stock units exercisable period after the date of grant					4 years
Common Stock | 2015 Stock Repurchase Program
Class of Stock [Line Items]
Stock repurchase program, authorized amount								$ 200,000,000.0
Common stock, par value (in dollars per share)								$ 0.01
Number of shares repurchased (in shares)					1,600,000
Shares repurchased, average cost per share (in dollars per share)					$ 20.72
Value of stock repurchased					$ 33,500,000
Common Stock | Stock Repurchase Program
Class of Stock [Line Items]
Stock repurchase program, amount available for repurchase					$ 166,500,000
2017 Grant 1 | RSUs | Long Term Incentive Plan
Class of Stock [Line Items]
Performance period						1 year
Granted (shares)						45,076
2017 Grant 2 | RSUs | Long Term Incentive Plan
Class of Stock [Line Items]
Performance period						2 years
Granted (shares)						92,585

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Cover Page - USD ($)	12 Months Ended
	Dec. 31, 2019	Jan. 31, 2020	Jun. 30, 2019
Entity Information
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2019
Document Transition Report	false
Entity File Number	001-36113
Entity Registrant Name	COLUMBIA PROPERTY TRUST, INC.
Entity Incorporation, State or Country Code	MD
Entity Tax Identification Number	20-0068852
Entity Address, Address Line One	315 Park Avenue South
Entity Address, City or Town	New York
Entity Address, State or Province	NY
Entity Address, Postal Zip Code	10010
City Area Code	212
Local Phone Number	687-0800
Title of 12(b) Security	Common Stock, $0.01 par value
Trading Symbol	CXP
Security Exchange Name	NYSE
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Shell Company	false
Entity Emerging Growth Company	false
Entity Public Float			$ 1,744,911,617
Entity Common Stock, Shares Outstanding		115,232,240
Entity Central Index Key	0001252849
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	FY
Amendment Flag	false
Documents Incorporated by Reference	Registrant incorporates by reference portions of the Columbia Property Trust, Inc. Definitive Proxy Statement for the 2020 Annual Meeting of Stockholders (Items 10, 11, 12, 13, and 14 of Part III) to be filed prior to April 29, 2020.
Columbia Property Trust Operating Partnership, L.P.
Entity Information
Entity File Number	333-175623
Entity Registrant Name	COLUMBIA PROPERTY TRUST OPERATING PARTNERSHIP, L.P.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	20-0068907
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Shell Company	false
Entity Emerging Growth Company	false

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Leases - Summary of Impact of Operating Leases on Statements of Operations and Statements of Cash Flows (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)
Lessee, Lease, Description [Line Items]
Operating lease expenses	$ 2,745
Cash paid for operating lease liabilities included in cash flows from operations	(2,026)
Ground Leases
Lessee, Lease, Description [Line Items]
Operating lease expenses	2,165
Cash paid for operating lease liabilities included in cash flows from operations	(1,329)
Office Lease
Lessee, Lease, Description [Line Items]
Operating lease expenses	580
Cash paid for operating lease liabilities included in cash flows from operations	(697)
Property operating costs
Lessee, Lease, Description [Line Items]
Operating lease expenses	2,165
Property operating costs | Ground Leases
Lessee, Lease, Description [Line Items]
Operating lease expenses	2,165
Property operating costs | Office Lease
Lessee, Lease, Description [Line Items]
Operating lease expenses	0
General and administrative – corporate
Lessee, Lease, Description [Line Items]
Operating lease expenses	580
General and administrative – corporate | Ground Leases
Lessee, Lease, Description [Line Items]
Operating lease expenses	0
General and administrative – corporate | Office Lease
Lessee, Lease, Description [Line Items]
Operating lease expenses	$ 580

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Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Cash Flows From Operating Activities:
Net income	$ 9,064	$ 9,491	$ 176,041
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities:
Straight-line rental income	(13,230)	(25,952)	(32,737)
Noncash operating lease expense	720	0	0
Depreciation	78,292	81,795	80,394
Amortization	23,546	29,401	31,907
Impairment loss on real estate assets	43,941	30,812	0
Noncash interest expense	2,562	3,103	3,009
(Gain) loss on extinguishment of debt	0	(23,340)	325
Gains on sales of real estate assets	(42,030)	0	(175,518)
Income from unconsolidated joint ventures	(8,004)	(8,003)	(2,651)
Distributions of earnings from unconsolidated joint ventures	27,977	28,802	3,681
Gain on sale of unconsolidated joint venture interest	0	(762)	0
Stock-based compensation expense	6,622	6,966	7,580
Changes in Assets and Liabilities, Net of Acquisitions and Dispositions:
Decrease (increase) in tenant receivables, net	697	(2,947)	4,222
Decrease (increase) in prepaid expenses and other assets	(1,539)	7,871	(1,754)
Decrease (increase) in accounts payable and accrued expenses	5,560	(36,724)	(28,133)
Increase (decrease) in deferred income	3,265	(2,888)	(4,442)
Net cash provided by operating activities	137,443	97,625	61,924
Cash Flows From Investing Activities:
Net proceeds from the sale of real estate	375,004	284,608	737,631
Net proceeds from the sale of investments in unconsolidated joint ventures	0	235,083	0
Real estate acquisitions and prepaid transaction costs	(453,128)	(23,034)	(604,769)
Capital improvements and development costs	(66,994)	(71,033)	(86,805)
Deferred lease costs paid	(22,307)	(24,816)	(26,722)
Investments in unconsolidated joint ventures	(17,134)	(38,763)	(369,043)
Distributions in excess of earnings from unconsolidated joint ventures	14,250	13,685	1,985
Net cash provided by (used in) investing activities	(170,309)	375,730	(347,723)
Cash Flows From Financing Activities:
Financing costs paid	(162)	(5,078)	(1,269)
Proceeds from lines of credit and notes payable	802,000	579,000	783,000
Repayments of lines of credit and notes payable	(650,000)	(872,175)	(533,427)
Distributions paid to stockholders	(93,480)	(95,056)	(109,561)
Redemptions of common stock	(35,917)	(72,495)	(59,462)
Contribution from noncontrolling interest in consolidated joint venture	5,610	0	0
Net cash provided by (used in) financing activities	28,051	(465,804)	79,281
Net increase (decrease) in cash and cash equivalents	(4,815)	7,551	(206,518)
Cash and cash equivalents, beginning of period	17,118	9,567	216,085
Cash and cash equivalents, end of period	12,303	17,118	9,567
Columbia Property Trust Operating Partnership, L.P.
Cash Flows From Operating Activities:
Net income	12,901	4,216	163,530
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities:
Straight-line rental income	(12,077)	(22,654)	(29,790)
Noncash operating lease expense	836	0	0
Depreciation	67,773	71,934	72,010
Amortization	22,177	28,185	30,376
Impairment loss on real estate assets	43,941	30,812	0
Noncash interest expense	2,562	3,103	3,009
(Gain) loss on extinguishment of debt	0	(23,340)	325
Gains on sales of real estate assets	(42,030)	0	(170,733)
Income from unconsolidated joint ventures	(8,004)	(8,003)	(2,651)
Distributions of earnings from unconsolidated joint ventures	27,977	28,802	3,681
Gain on sale of unconsolidated joint venture interest	0	(762)	0
Changes in Assets and Liabilities, Net of Acquisitions and Dispositions:
Decrease (increase) in tenant receivables, net	918	(2,842)	4,111
Decrease (increase) in prepaid expenses and other assets	(1,662)	7,341	(1,001)
Decrease (increase) in accounts payable and accrued expenses	3,489	(35,708)	(29,032)
Increase (decrease) in deferred income	3,712	(1,919)	(4,056)
Net cash provided by operating activities	122,513	79,165	39,779
Cash Flows From Investing Activities:
Net proceeds from the sale of real estate	375,004	284,608	618,199
Net proceeds from the sale of investments in unconsolidated joint ventures	0	235,083	0
Real estate acquisitions and prepaid transaction costs	(453,128)	(23,034)	(604,769)
Capital improvements and development costs	(65,961)	(65,810)	(53,480)
Deferred lease costs paid	(22,667)	(25,364)	(26,710)
Investments in unconsolidated joint ventures	(17,134)	(38,763)	(369,043)
Distributions in excess of earnings from unconsolidated joint ventures	14,250	13,685	1,985
Net cash provided by (used in) investing activities	(169,636)	380,405	(433,818)
Cash Flows From Financing Activities:
Financing costs paid	(162)	(5,078)	(1,269)
Proceeds from lines of credit and notes payable	802,000	579,000	783,000
Repayments of lines of credit and notes payable	(650,000)	(872,175)	(533,427)
Contributions from Columbia Property Trust	17,663	11,912	296,083
Distributions to Columbia Property Trust	(129,397)	(167,551)	(169,023)
Contribution from noncontrolling interest in consolidated joint venture	5,610	0	0
Net cash provided by (used in) financing activities	45,714	(453,892)	375,364
Net increase (decrease) in cash and cash equivalents	(1,409)	5,678	(18,675)
Cash and cash equivalents, beginning of period	10,931	5,253	23,928
Cash and cash equivalents, end of period	$ 9,522	$ 10,931	$ 5,253

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Summary of Significant Accounting Policies - Assets and Liabilities Held for sale (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Accounting Policies [Abstract]
Land	$ 57,117
Buildings and improvements, less accumulated depreciation of $80,543	157,701
Construction in progress	138
Total real estate assets held for sale, net	214,956
Tenant receivables	156
Straight-line rent receivable	12,591
Prepaid expenses and other assets	334
Deferred lease costs, less accumulated amortization of $10,222	10,836
Total other assets held for sale, net	23,917	$ 0
Accounts payable, accrued expenses, and accrued capital expenditures	1,151
Deferred income	1,903
Total liabilities held for sale	3,054
Accumulated depreciation	80,543
Accumulated amortization	$ 10,222

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Real Estate Transactions - Schedule of Properties Acquired (Details) - USD ($) $ in Thousands								12 Months Ended
	Dec. 09, 2019	Dec. 02, 2019	Oct. 24, 2018	Oct. 03, 2018	Nov. 28, 2017	Oct. 11, 2017	Jul. 06, 2017	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Business Acquisition [Line Items]
Purchase price								$ 453,128	$ 23,034	$ 604,769
Purchase price of joint venture								$ 17,134	$ 38,763	$ 369,043
201 California Street
Business Acquisition [Line Items]
Ownership percentage	100.00%
Purchase price	$ 238,900
101 Franklin Street
Business Acquisition [Line Items]
Ownership percentage		92.50%
Purchase price		$ 205,500
Lindbergh Center – Retail
Business Acquisition [Line Items]
Ownership percentage			100.00%
Purchase price			$ 23,000
149 Madison Avenue
Business Acquisition [Line Items]
Ownership percentage					100.00%
Purchase price					$ 87,700
249 West 17th Street & 218 West 18th Street
Business Acquisition [Line Items]
Ownership percentage						100.00%
Purchase price						$ 514,100
Corporate Joint Venture | 799 Broadway Joint Venture
Business Acquisition [Line Items]
Ownership percentage				49.70%				49.70%
Purchase price of joint venture				$ 30,200
Corporate Joint Venture | 1800 M Street Joint Venture
Business Acquisition [Line Items]
Ownership percentage						55.00%		55.00%
Purchase price						$ 421,000
Purchase price of joint venture						$ 231,550
Corporate Joint Venture | 114 Fifth Avenue
Business Acquisition [Line Items]
Ownership percentage							49.50%	49.50%
Purchase price of joint venture							$ 108,900

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Segment Information (Operating Revenues By Geographic Reportable Segment) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Jan. 31, 2018	Oct. 11, 2017	Jul. 06, 2017	Jul. 05, 2017
Segment Reporting Information [Line Items]
Operating revenues including unconsolidated joint venture									$ 396,236	$ 403,082	$ 345,955
Operating revenues	$ 68,725	$ 71,949	$ 72,730	$ 75,433	$ 75,523	$ 73,340	$ 75,370	$ 73,710	288,837	297,943	289,000
Asset and property management fee income									7,500	7,400	3,800
Operating Segments
Segment Reporting Information [Line Items]
Operating revenues including unconsolidated joint venture									393,099	399,917	344,048
Operating Segments | New York
Segment Reporting Information [Line Items]
Operating revenues including unconsolidated joint venture									157,244	158,077	123,280
Operating Segments | San Francisco
Segment Reporting Information [Line Items]
Operating revenues including unconsolidated joint venture									114,295	105,947	105,550
Operating Segments | Washington, D.C.
Segment Reporting Information [Line Items]
Operating revenues including unconsolidated joint venture									58,200	57,274	36,934
Operating Segments | Boston
Segment Reporting Information [Line Items]
Operating revenues including unconsolidated joint venture									14,285	13,441	11,559
Operating Segments | Los Angeles
Segment Reporting Information [Line Items]
Operating revenues including unconsolidated joint venture									7,754	7,783	7,462
Operating Segments | All other office markets
Segment Reporting Information [Line Items]
Operating revenues including unconsolidated joint venture									41,321	57,395	59,263
Segment Reconciling Items
Segment Reporting Information [Line Items]
Operating revenues including unconsolidated joint venture									0	0	1,328
Asset and property management fee income									7,544	7,384	3,782
Corporate
Segment Reporting Information [Line Items]
Operating revenues including unconsolidated joint venture									3,137	3,165	579
Joint Venture
Segment Reporting Information [Line Items]
Operating revenues									114,943	112,523	60,737
Asset and property management fee income									(7,544)	(7,384)	(3,782)
Corporate Joint Venture
Segment Reporting Information [Line Items]
Asset and property management fee income									$ 7,544	7,384	3,782
114 Fifth Avenue | Corporate Joint Venture
Segment Reporting Information [Line Items]
Ownership percentage	49.50%								49.50%					49.50%
University Circle & 333 Market Street | Corporate Joint Venture
Segment Reporting Information [Line Items]
Ownership percentage	55.00%								55.00%			77.50%			100.00%
Market Square Joint Venture | Corporate Joint Venture
Segment Reporting Information [Line Items]
Ownership percentage	51.00%								51.00%
Asset and property management fee income									$ 2,256	2,156	1,998
1800 M Street Joint Venture | Corporate Joint Venture
Segment Reporting Information [Line Items]
Ownership percentage	55.00%								55.00%				55.00%
Asset and property management fee income									$ 2,156	$ 2,161	$ 417

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Segment Information - Reconciliation of Revenue from Segments to Consolidated (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Segment Reporting Information [Line Items]
Net income	$ (21,777)	$ (20,286)	$ 47,747	$ 3,513	$ 5,003	$ 6,429	$ (3,439)	$ 1,498	$ 9,197	$ 9,491	$ 176,041
Depreciation									78,292	81,795	80,394
Amortization									27,908	32,554	32,403
Impairment loss on real estate		$ 23,400					$ 30,800		43,941	30,812	0
General and administrative expense - corporate									32,779	32,979	34,966
General and administrative – joint venture									3,567	3,108	1,454
Pre-acquisition costs (Note 16)									6,398	0	0
Income tax expense									21	37	(213)
Asset and property management fee income									(7,500)	(7,400)	(3,800)
Gain on sale of unconsolidated joint venture interest									0	(762)	0
Gain on sale of real estate assets									(42,030)	0	(175,518)
Adjustment attributable to noncontrolling interests									(133)	0	0
Net operating income									257,034	271,499	228,875
Segment Reconciling Items
Segment Reporting Information [Line Items]
Depreciation									78,292	81,795	80,394
Amortization									27,908	32,554	32,403
Impairment loss on real estate									43,941	30,812	0
General and administrative expense - corporate									32,779	32,979	34,966
General and administrative – joint venture									3,567	3,108	1,454
Pre-acquisition costs (Note 16)									6,398	0	0
Net interest expense									42,997	56,477	58,187
Interest income from development authority bonds									0	(6,871)	(7,200)
(Gain) loss on extinguishment of debt									0	(23,340)	325
Income tax expense									21	37	(213)
Asset and property management fee income									(7,544)	(7,384)	(3,782)
Adjustments included in loss from unconsolidated joint venture									61,634	62,603	31,818
Gain on sale of unconsolidated joint venture interest									0	(762)	0
Gain on sale of real estate assets									(42,030)	0	(175,518)
Adjustment attributable to noncontrolling interests									$ (126)	$ 0	$ 0

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Leases - Summary of Fixed and Variable Revenues (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Leases [Abstract]
Fixed payments	$ 250,077
Variable payments	26,072
Total lease revenues	$ 276,149	$ 276,149	$ 283,252	$ 280,570

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Income Taxes (Distributions) (Details)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Ordinary income	53.10%	100.00%	58.50%
Capital gains	0.00%	0.00%	0.00%
Return of capital	46.90%	0.00%	41.50%
Total	100.00%	100.00%	100.00%

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Line of Credit and Notes Payable (Narrative) (Details)							3 Months Ended	12 Months Ended
	Dec. 07, 2018 USD ($) extension	Oct. 10, 2018 USD ($)	May 30, 2018 USD ($)	May 29, 2018 USD ($)	Apr. 13, 2018 USD ($)	Feb. 02, 2018 USD ($)	Jun. 30, 2018 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Debt Instrument [Line Items]
Outstanding debt								$ 781,916,000	$ 629,308,000
Carrying value of the line of credit, term loan and notes payable								$ 784,000,000.0	632,000,000.0
Weighted-average interest rate								3.55%
Interest payments								$ 17,900,000	22,100,000	$ 21,500,000
Interest capitalized								5,100,000	4,000,000.0	300,000
(Gain) loss on extinguishment of debt							$ (24,000,000.0)	0	(23,340,000)	$ 325,000
Fair Value, Inputs, Level 2
Debt Instrument [Line Items]
Fair value of line of credit and notes payable								$ 784,100,000	632,100,000
Letter of Credit | Maximum
Debt Instrument [Line Items]
Restrictive covenant ratio of secured debt to total asset								40.00%
Restrictive covenant ratio of debt to total asset								60.00%
Restrictive covenant ratio of debt to total asset following material transaction								65.00%
Credit Facilities | Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	$ 500,000,000.0
Number of possible extensions | extension	2
Term of extension	6 months
Outstanding debt								$ 334,000,000	482,000,000
Credit Facilities | Revolving Credit Facility | Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	$ 650,000,000.0
Credit Facilities | Revolving Credit Facility | Base Rate | Minimum
Debt Instrument [Line Items]
Variable rate margin	0.00%
Credit Facilities | Revolving Credit Facility | Base Rate | Maximum
Debt Instrument [Line Items]
Variable rate margin	0.45%
Credit Facilities | Revolving Credit Facility | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Variable rate margin								0.90%
Credit Facilities | Revolving Credit Facility | London Interbank Offered Rate (LIBOR) | Minimum
Debt Instrument [Line Items]
Variable rate margin	0.775%
Credit Facilities | Revolving Credit Facility | London Interbank Offered Rate (LIBOR) | Maximum
Debt Instrument [Line Items]
Variable rate margin	1.45%
Term Loans | $300 Million Term Loan
Debt Instrument [Line Items]
Debt face amount	$ 300,000,000							$ 300,000,000
Outstanding debt								$ 300,000,000	0
Repayments of debt	$ 300,000,000.0
Term Loans | $300 Million Term Loan | Base Rate | Minimum
Debt Instrument [Line Items]
Variable rate margin	0.00%
Term Loans | $300 Million Term Loan | Base Rate | Maximum
Debt Instrument [Line Items]
Variable rate margin	0.65%
Term Loans | $300 Million Term Loan | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Variable rate margin								1.00%
Term Loans | $300 Million Term Loan | London Interbank Offered Rate (LIBOR) | Minimum
Debt Instrument [Line Items]
Variable rate margin	0.85%
Term Loans | $300 Million Term Loan | London Interbank Offered Rate (LIBOR) | Maximum
Debt Instrument [Line Items]
Variable rate margin	1.65%
Term Loans | $150 Million Term Loan
Debt Instrument [Line Items]
Debt face amount								$ 150,000,000
Outstanding debt								$ 150,000,000	$ 150,000,000
Term Loans | $150 Million Term Loan | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Variable rate margin								1.10%
Unsecured Debt
Debt Instrument [Line Items]
Fixed charge coverage ratio								1.50
Unencumbered interest coverage ratio, minimum								1.75
Unencumbered leverage ratio, minimum								0.60
Unencumbered leverage ratio following material transaction, minimum								0.65
Line of credit and notes payable
Debt Instrument [Line Items]
Weighted-average interest rate								2.63%	3.26%
Mortgages | One Glenlake Building mortgage note
Debt Instrument [Line Items]
Repayments of debt		$ 20,700,000
Mortgages | 263 Shuman Boulevard Building mortgage note
Debt Instrument [Line Items]
Extinguishment of debt					$ 49,000,000.0
(Gain) loss on extinguishment of debt							$ (24,000,000.0)
Bridge Loan | $300 Million Bridge Loan
Debt Instrument [Line Items]
Outstanding debt						$ 300,000,000.0
Repayments of debt			$ 180,000,000.0	$ 180,000,000.0		$ 120,000,000.0
(Gain) loss on extinguishment of debt			$ 300,000

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Unconsolidated Joint Ventures (Condensed Balance Sheet Information) (Details) - Corporate Joint Venture $ in Thousands		12 Months Ended
	Oct. 03, 2018 USD ($)	Dec. 31, 2019 USD ($) extension	Dec. 31, 2018 USD ($)
Schedule of Equity Method Investments [Line Items]
Total Assets		$ 2,291,036	$ 2,176,751
Total Debt		434,550	420,392
Total Equity		1,441,218	1,467,334
Market Square Joint Venture
Schedule of Equity Method Investments [Line Items]
Total Assets		582,747	582,176
Total Debt		324,815	324,762
Total Equity		241,719	241,581
University Circle Joint Venture
Schedule of Equity Method Investments [Line Items]
Total Assets		216,546	224,746
Total Debt		0	0
Total Equity		212,656	219,390
333 Market Street Joint Venture
Schedule of Equity Method Investments [Line Items]
Total Assets		367,652	375,884
Total Debt		0	0
Total Equity		352,385	360,915
114 Fifth Avenue
Schedule of Equity Method Investments [Line Items]
Total Assets		485,442	377,970
Total Debt		0	0
Total Equity		127,554	149,243
1800 M Street Joint Venture
Schedule of Equity Method Investments [Line Items]
Total Assets		437,439	447,585
Total Debt		0	0
Total Equity		421,588	429,016
799 Broadway Joint Venture
Schedule of Equity Method Investments [Line Items]
Total Assets		201,210	168,390
Total Debt		109,735	95,630
Total Equity		85,316	67,189
Blackstone Property Partners
Schedule of Equity Method Investments [Line Items]
Mortgage note transferred to joint venture		$ 325,000	$ 325,000
Stated interest rate		5.07%	5.07%
799 Broadway Joint Venture
Schedule of Equity Method Investments [Line Items]
Proceeds from construction loan	$ 97,000	$ 113,200
Deferred financing costs		3,500
Borrowing capacity		$ 187,000
Interest rate (as a percent)		4.00%
Basis spread (in points)		4.25%
Number of extension options | extension		2
Extension term		1 year

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Stockholders' Equity and Partner's Capital (Tables)

12 Months Ended

Dec. 31, 2019

Share-based Payment Arrangement [Abstract]

Summary of the Activity of the Employee Stock Grants

Below is a summary of the employee awards issued under the LTI Plan for 2019, 2018, and 2017:

	Restricted Shares				RSUs
	Shares (in thousands)		Estimated Fair Value(1)		Units (in thousands)		Estimated Fair Value(2)
Unvested as of January 1, 2017	256		$	22.62	—		$	—
Granted	333		$	21.59	331		$	18.78
Vested	(193)		$	22.42	—		$	—
Forfeited	(7)		$	21.81	(2)		$	19.01
Unvested as of December 31, 2017	389		$	21.85	329		$	—
Granted	139		$	22.97	206		$	20.55
Vested	(153)		$	22.13	(70)		$	19.47
Forfeited	—		$	—	(11)		$	18.60
Unvested as of December 31, 2018	375		$	22.15	454		$	19.37
Granted	176		$	19.36	257		$	17.66
Vested	(165)		$	21.99	(121)		$	19.08
Forfeited	(12)		$	20.66	(6)		$	18.67
Unvested as of December 31, 2019	374	(3)	$	20.96	584	(3)	$	18.86

⁽¹⁾Reflects the weighted-average grant-date fair value using the market closing price on the date of the grant.

⁽²⁾Reflects the weighted-average grant-date fair value using a Monte Carlo valuation.

⁽³⁾As of December 31, 2019, Columbia Property Trust expects approximately 360,000 of the 374,000 unvested restricted shares to ultimately vest and approximately 562,000 of the 584,000 unvested RSUs to ultimately vest, assuming a forfeiture rate of 4%, which was determined based on peer company data, adjusted for the specifics of the LTI Plan.

Summary of Shares Granted to Independent Directors

During 2019, 2018, and 2017, Columbia Property Trust granted the following equity retainers:

Date of Grant	Shares	Grant-Date Fair Value(1)
2019 Director Grants:
May 14, 2019	28,000	$	22.13
2018 Director Grants:
May 14, 2018	31,743	$	22.20
2017 Director Grants:
January 3, 2017	8,279	$	21.58
May 2, 2017	33,581	$	22.57
November 27, 2017(2)	1,596	$	23.07

⁽¹⁾Columbia Property Trust determined the grant-date fair value using the market closing price on the date of the grant.

⁽²⁾In November 2017, a new director was appointed to the board of directors of Columbia Property Trust. The new director received a pro-rated annual equity retainer grant at appointment.

Summary of Incurred Stock-Based Compensation Expense

Columbia Property Trust incurred stock-based compensation expense related to the following events (in thousands):

	2019		2018		2017
Amortization of unvested LTI Plan awards	$	3,282	$	3,800	$	4,098
Future employee awards(1)	2,720		2,461		2,509
Issuance of shares to independent directors	620		705		973
Total stock-based compensation expense	$	6,622	$	6,966	$	7,580

⁽¹⁾Reflects amortization of LTI Plan awards for service during the current period, for which shares will be issued in future periods.

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Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2019

Earnings Per Share [Abstract]

Schedule of Basic and Diluted Earnings per Share

The following table reconciles the numerator for the basic and diluted earnings-per-share computations shown on the consolidated statements of income (in thousands):

	2019		2018		2017
Net income attributable to common stockholders	$	9,197	$	9,491	$	176,041
Distributions paid on unvested shares	(310)		(296)		(337)
Net income attributable to common stockholders used to calculate basic and diluted earnings per share	$	8,887	$	9,195	$	175,704

The following table reconciles the denominator for the basic and diluted earnings-per-share computations shown on the consolidated statements of income (in thousands):

	2019	2018	2017
Weighted-average common shares – basic	116,261	117,888	120,795
Plus Incremental Weighted-Average Shares from Time-Vested Conversions Less Assumed Share Repurchases:
Previously granted LTI Plan awards, unvested	114	104	116
Future LTI Plan awards	83	319	248
Weighted-average common shares – diluted	116,458	118,311	121,159

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Bonds Payable

12 Months Ended

Dec. 31, 2019

Debt Disclosure [Abstract]

Bonds Payable

Bonds Payable

Columbia OP has two series of bonds outstanding as of December 31, 2019 and 2018: $350 million of 10-year, unsecured 3.650% senior notes issued at 99.626% of their face value (the "2026 Bonds Payable"); and $350.0 million of 10-year, unsecured 4.150% senior notes issued at 99.859% of their face value (the "2025 Bonds Payable"). Both series of bonds are guaranteed by Columbia Property Trust and require semi-annual interest payments. Upon issuance, a portion of the 2026 Bonds Payable was used to redeem $250.0 million of bonds payable, due in April 2018. During the years ended December 31, 2019 and 2018, Columbia Property Trust made interest payments of $27.3 million on its bonds payable. The principal amount of the 2026 Bonds Payable is due and payable on August 15, 2026, and the principal amount of the 2025 Bonds Payable is due and payable on April 1, 2025.

The 2026 Bonds Payable and the 2025 Bonds Payable contain certain restrictive covenants. These covenants, as defined, pursuant to an indenture:

•limit the ratio of debt to total assets to 60%;

•limit Columbia Property Trust's ability to incur debt if the consolidated income available for debt service to annual debt service charge for four previous consecutive fiscal quarters is less than 1.50:1.00 on a pro forma basis;

•limit Columbia Property Trust's ability to incur liens if, on an aggregate basis for Columbia Property Trust, the secured debt amount would exceed 40% of the value of the total assets; and

•require that the ratio of unencumbered asset value, as defined, to total unsecured debt be at least 150% at all times.

As of December 31, 2019, Columbia Property Trust was in compliance with the restrictive financial covenants on its 2026 Bonds Payable and 2025 Bonds Payable.

The estimated fair value of the 2025 Bonds Payable and the 2026 Bonds Payable as of December 31, 2019 and 2018, was approximately $734.4 million and $685.0 million, respectively. The related carrying value of the bonds payable, net of discounts, as of December 31, 2019 and 2018, was $698.9 million and $698.7 million, respectively. Columbia Property Trust estimated the fair value of the bonds payable based on a discounted cash flow analysis, using observable market data for its bonds payable and similar instruments (Level 2). The discounted cash flow method of assessing fair value results in a general approximation of value, which may differ from the price that could be achieved in a market transaction.

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Summary of Significant Accounting Policies

12 Months Ended

Dec. 31, 2019

Accounting Policies [Abstract]

Summary of Significant Accounting Policies

Summary of Significant Accounting Policies

Basis of Presentation

The accompanying consolidated financial statements are prepared in conformity with accounting principles generally accepted in the United States of America ("GAAP"), which require us to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting periods. Actual results could differ from those estimates.

Columbia Property Trust's consolidated financial statements include the accounts of Columbia Property Trust, Columbia OP, and their consolidated subsidiaries. Columbia OP's consolidated financial statements include the accounts of Columbia OP, and its consolidated subsidiaries. We consolidate any variable interest entity ("VIE") in which we are deemed the primary beneficiary. With respect to entities that are not VIEs, our consolidated financial statements also include the accounts of any entity in which we own a controlling financial interest, and any limited partnership in which we own a controlling general partnership interest. In determining whether Columbia Property Trust or Columbia OP owns a controlling interest, the following factors are considered, among other things: the ownership of voting interests, protective rights, and participatory rights of the investors.

All intercompany balances and transactions have been eliminated in consolidation.

Use of Estimates

The preparation of the consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported in the accompanying consolidated financial statements and the accompanying notes. Actual results could differ from those estimates.

Fair Value Measurements

Columbia Property Trust estimates the fair value of its assets and liabilities (where currently required under GAAP) consistent with the provisions of Accounting Standard Codification 820, Fair Value Measurements ("ASC 820"). Under this standard, fair value is defined as the price that would be received upon sale of an asset or paid upon transfer of a liability in an orderly transaction between market participants at the measurement date. While

various techniques and assumptions can be used to estimate fair value depending on the nature of the asset or liability, the accounting standard for fair value measurements and disclosures provides the following fair value technique parameters and hierarchy, depending upon availability:

Level 1 – Assets or liabilities for which the identical term is traded on an active exchange, such as publicly traded instruments or futures contracts.

Level 2 – Assets and liabilities valued based on observable market data for similar instruments.

Level 3 – Assets or liabilities for which significant valuation assumptions are not readily observable in the market. Such assets or liabilities are valued based on the best available data, some of which may be internally developed. Significant assumptions may include risk premiums that a market participant would consider.

Real Estate Assets

Real estate assets are stated at cost, less accumulated depreciation and amortization. Amounts capitalized to real estate assets consist of the cost of acquisition or construction, and any tenant improvements or major improvements that extend the useful life of the related asset. All repairs and maintenance costs are expensed as incurred.

Columbia Property Trust is required to make subjective assessments as to the useful lives of its depreciable assets. To determine the appropriate useful life of an asset, Columbia Property Trust considers the period of future benefit of the asset. These assessments have a direct impact on net income. The estimated useful lives of its assets by class are as follows:

Buildings	40 years
Building and site improvements	5-25 years
Tenant improvements	Shorter of economic life or lease term
Intangible lease assets	Lease term

As further described in Note 5, Line of Credit and Notes Payable, Columbia Property Trust capitalizes interest incurred on outstanding debt balances as well as joint venture investments, as appropriate, during development or redevelopment of real estate held directly or in joint ventures. During 2019 and 2018, $5.1 million and $3.8 million of interest was capitalized to construction in progress, respectively; and $1.3 million and $0.2 million of interest was capitalized to investments in unconsolidated joint ventures, respectively.

Assets Held for Sale

Columbia Property Trust classifies properties as held for sale according to Accounting Standard Codification 360, Accounting for the Impairment or Disposal of Long-Lived Assets ("ASC 360"). According to ASC 360, properties having separately identifiable operations and cash flows, are considered held for sale when the following criteria are met:

•Management, having the authority to approve the action, commits to a plan to sell the property.

•The property is available for immediate sale in its present condition, subject only to terms that are usual and customary for sales of such property.

•An active program to locate a buyer and other actions required to complete the plan to sell the property have been initiated.

•The property is being actively marketed for sale at a price that is reasonable in relation to its current fair value.

•Actions required to complete the plan indicate that it is unlikely that significant changes to the plan will be made or that the plan will be withdrawn.

•The sale of the property is probable and transfer of the property is expected to qualify for recognition as a completed sale, within one year.

At such time that a property is determined to be held for sale, its carrying amount is adjusted to the lower of its depreciated book value or its estimated fair value, less costs to sell, and depreciation is no longer recognized; and assets and liabilities are required to be classified as held for sale on the accompanying consolidated balance sheet. As of December 31, 2019, Cranberry Woods Drive and Pasadena Corporate Park met the aforementioned criteria; thus, these properties are classified as held for sale in the accompanying consolidated balance sheets. The sale of Cranberry Woods closed on January 16, 2020. As of December 31, 2018, none of Columbia Property Trust's properties met the criteria to be classified as held for sale in the accompanying consolidated balance sheet.

The major classes of assets and liabilities classified as held for sale are provided below (in thousands):

	December 31, 2019
Real Estate Assets Held for Sale:
Real estate assets, at cost:
Land	$	57,117
Buildings and improvements, less accumulated depreciation of $80,543	157,701
Construction in progress	138
Total real estate assets held for sale, net	$	214,956
Other Assets Held for Sale:
Tenant receivables	$	156
Straight-line rent receivable	12,591
Prepaid expenses and other assets	334
Deferred lease costs, less accumulated amortization of $10,222	10,836
Total other assets held for sale, net	$	23,917
Liabilities Held for Sale:
Accounts payable, accrued expenses, and accrued capital expenditures	$	1,151
Deferred income	1,903
Total liabilities held for sale	$	3,054

Evaluating the Recoverability of Real Estate Assets

Columbia Property Trust continually monitors events and changes in circumstances that could indicate that the net carrying amounts of its real estate and related intangible assets and liabilities, of both operating properties and properties under redevelopment, may not be recoverable. When indicators of potential impairment are present that suggest that the net carrying amounts of real estate assets and related intangible assets and liabilities may not be recoverable, Columbia Property Trust assesses the recoverability of these net assets by determining whether the respective carrying values will be recovered through the estimated undiscounted future cash flows expected from the use of the net assets and their eventual disposition. In the event that such expected undiscounted future cash flows do not exceed the carrying values, Columbia Property Trust adjusts the carrying values of the real estate assets and related intangible assets and liabilities to the estimated fair values, pursuant to the property, plant, and equipment accounting standard for the impairment or disposal of long-lived assets, and recognizes an impairment loss. At such time that a property is required to be classified as held for sale, its net carrying amount is adjusted to the lower of its depreciated book value or its estimated fair value, less costs to sell, and depreciation is no longer recognized.

Estimated fair values are calculated based on the following hierarchy of information: (i) recently quoted market prices, (ii) market prices for comparable properties, or (iii) the present value of future cash flows, including estimated residual value. Projections of expected future operating cash flows require that Columbia Property Trust estimate future market rental income amounts subsequent to the expiration of current lease agreements, property operating expenses, the number of months it takes to re-lease the property, and the number of years the property is held for investment, among other factors. Due to the inherent subjectivity of the assumptions used to project future cash flows, estimated fair values may differ from the values that would be realized in market transactions. Certain of

Columbia Property Trust's assets may be carried at an amount that exceeds that which could be realized in a current disposition transaction. Columbia Property Trust has determined that the carrying values of its real estate assets and related intangible assets are recoverable as of December 31, 2019.

In the fourth quarter of 2019, Columbia Property Trust recorded an impairment loss of $20.6 million on Pasadena Corporate Park. Upon deciding to exit the Los Angeles market, Columbia Property Trust began to market for sale its only asset therein, Pasadena Corporate Park, in the fourth quarter of 2019. In January 2020, Columbia Property Trust entered into a contract to sell Pasadena Corporate Park, and anticipates closing on the sale in the first quarter of 2020. As a result, as of December 31,2019, Columbia Property Trust reduced the carrying value of Pasadena Corporate Park to reflect its estimated fair value of $74.5 million, determined based on estimated net sale proceeds (Level 1), by recording an impairment loss of $20.6 million.

In the third quarter of 2019, Columbia Property Trust recognized an impairment loss of $23.4 million as a result of changing its holding period expectations for Lindbergh Center in Atlanta, Georgia. Columbia Property Trust entered into a contract to sell Lindbergh Center in the third quarter of 2019, and closed the sale on September 26, 2019. As a result, Columbia Property Trust reduced the carrying value of Lindbergh Center to reflect its estimated fair value, based on the estimated net sale proceeds of $181.0 million (Level 1), by recording an impairment loss of $23.4 million in the third quarter of 2019.

In the second quarter of 2018, Columbia Property Trust recognized an impairment loss of $30.8 million in connection with changing the holding period expectations for 222 East 41st Street in New York. Columbia Property Trust widely marketed this property for sale during the second quarter and, as a result, entered into an agreement to sell this property on May 25, 2018 and closed on the sale on May 29, 2018. Upon entering into the sale agreement, Columbia Property Trust reduced 222 East 41st Street's carrying value to reflect its fair value, estimated based on the net contract price of $284.6 million (Level 1), by recording an impairment loss of $30.8 million in the second quarter of 2018.

Allocation of Purchase Price of Acquired Assets

Upon the acquisition of real properties, Columbia Property Trust allocates the purchase price of properties and related transaction costs to tangible assets, consisting of land, building, site improvements, and identified intangible assets and liabilities, including the value of in-place leases, based in each case on Columbia Property Trust's estimate of their fair values in accordance with ASC 820 (see "Fair Value Measurements" section above for additional details). In conjunction with certain acquisitions, Columbia Property Trust has entered into master lease agreements, which obligate the seller to pay rent pertaining to certain nonrevenue-producing spaces to mitigate the negative effects of lower rental revenues. Columbia Property Trust records payments receivable under such master lease agreements as a reduction of the property basis rather than income. Columbia Property Trust received no proceeds for master leases during 2019, 2018, or 2017.

The fair values of the tangible assets of an acquired property (which includes land, building, and site improvements) are determined by valuing the property as if it were vacant, and the "as-if-vacant" value is then allocated to land, building, and site improvements based on management's determination of the relative fair value of these assets. Management determines the as-if-vacant fair value of a property using methods similar to those used by independent appraisers. Factors considered by management in performing these analyses include an estimate of carrying costs during the expected lease-up periods considering current market conditions and costs to execute similar leases, including leasing commissions and other related costs. In estimating carrying costs, management includes real estate taxes, insurance, and other operating expenses during the expected lease-up periods based on current market demand.

Intangible Assets and Liabilities Arising From In-Place Leases Where Columbia Property Trust Is the Lessor

As further described below, in-place leases with Columbia Property Trust as the lessor may have values related to direct costs associated with obtaining a new tenant that are avoided for in-place leases, opportunity costs associated with lost rentals that are avoided by acquiring an in-place lease, tenant relationships, and effective contractual rental rates that are above or below market:

•Direct costs associated with obtaining a new tenant that are avoided for in-place leases, including commissions, tenant improvement allowances, and other direct costs, are estimated based on management's consideration of current market costs to execute a similar lease. Such direct costs are included in intangible lease origination costs in the accompanying consolidated balance sheets and are amortized to expense over the remaining terms of the respective leases.

•The value of opportunity costs associated with lost rentals avoided by acquiring an in-place lease is calculated based on contractual amounts to be paid pursuant to the in-place leases over a market absorption period for a similar lease. Such opportunity costs ("Absorption Period Costs") are included in intangible lease assets in the accompanying consolidated balance sheets and are amortized to expense over the remaining terms of the respective leases.

•The value of effective rental rates of in-place leases that are above or below the market rates of comparable leases is calculated based on the present value (using a discount rate that reflects the risks associated with the leases acquired) of the difference between (i) the contractual amounts to be received pursuant to the in-place leases and (ii) management's estimate of fair market lease rates for the corresponding in-place leases. This calculation includes significantly below-market renewal options for which exercise of the renewal option appears to be reasonably assured. These intangible assets or liabilities are measured over the actual or assumed (in the case of renewal options) remaining lease terms. The capitalized above-market and below-market lease values are recorded as intangible lease assets or liabilities and amortized as an adjustment to rental income over the remaining terms of the respective leases.

As of December 31, 2019 and 2018, Columbia Property Trust had the following gross intangible in-place lease assets and liabilities (in thousands):

		Intangible Lease Assets				Intangible Lease Origination Costs		Intangible Below-Market In-Place Lease Liabilities
		Above-Market In-Place Lease Assets		Absorption Period Costs
December 31, 2019	Gross	$	2,481	$	117,203	$	61,702	$	36,966
	Accumulated Amortization	(1,202)		(57,457)		(33,731)		(15,127)
	Net	$	1,279	$	59,746	$	27,971	$	21,839
December 31, 2018	Gross	$	3,174	$	147,668	$	99,440	$	42,847
	Accumulated Amortization	(1,060)		(81,220)		(65,348)		(21,766)
	Net	$	2,114	$	66,448	$	34,092	$	21,081

During 2019, 2018, and 2017, Columbia Property Trust recognized the following amortization of intangible lease assets and liabilities (in thousands):

	Intangible Lease Assets				Intangible Lease Origination Costs		Intangible Below-Market In-Place Lease Liabilities
	Above-Market In-Place Lease Assets		Absorption Period Costs
For the Years Ended December 31,
2019	$	288	$	13,511	$	7,398	$	5,395
2018	$	228	$	17,137	$	9,660	$	6,851
2017	$	519	$	16,807	$	10,124	$	6,883

The remaining net intangible assets and liabilities as of December 31, 2019, will be amortized as follows (in thousands):

	Intangible Lease Assets				Intangible Lease Origination Costs		Intangible Below-Market In-Place Lease Liabilities
	Above-Market In-Place Lease Assets		Absorption Period Costs
For the Years Ending December 31,
2020	$	172	$	12,871	$	5,866	$	5,483
2021	172		9,328		4,516		3,191
2022	172		7,959		3,429		2,910
2023	172		6,455		2,903		2,336
2024	172		5,594		2,586		1,990
Thereafter	419		17,539		8,671		5,929
	$	1,279	$	59,746	$	27,971	$	21,839
Weighted-average amortization period	6.6 years		5.0 years		4.9 years		5.3 years

Intangible Assets and Liabilities Arising From In-Place Leases Where Columbia Property Trust Is the Lessee

As of December 31, 2018, Columbia Property Trust had gross below-market lease assets of approximately $32.6 million, net of accumulated amortization of $2.6 million. These below-market lease assets were reclassified to operating lease assets upon adoption of ASC 842, effective January 1, 2019, as described in the "Recent Accounting Pronouncements" section below (see Note 10, Leases, for additional information).

Cash and Cash Equivalents

Columbia Property Trust considers all highly liquid investments purchased with an original maturity of three months or less to be cash equivalents. Cash equivalents may include cash and short-term investments. Short-term investments are stated at cost, which approximates fair value as of December 31, 2019 and 2018.

Tenant Receivables

Tenant receivables consist of rental and reimbursement billings due from tenants. Tenant receivables are recorded at the original amount earned, which approximates fair value. Management assesses the realizability of tenant receivables on an ongoing basis, and, if at any point during the term of a lease it is determined that the collectability of a tenant receivable is not probable, such receivable is written off against lease revenues. During 2019, $22,000 in receivables were written off against lease revenues. Prior to the adoption of ASC 842 on January 1, 2019, Columbia Property Trust recorded an allowance for doubtful accounts when a tenant receivable became uncollectible by recording a provision for doubtful accounts, net of recoveries, in general and administrative – corporate expenses. For 2018, $63,000 of such expenses were recorded to general and administrative – corporate expenses.

Straight-Line Rent Receivable

Straight-line rent receivable reflects the amount of cumulative adjustments necessary to present rental income on a straight-line basis. Columbia Property Trust recognizes rental revenues on a straight-line basis, ratably over the term of each lease; however, leases often provide for payment terms that differ from the revenue recognized. When the amount of cash billed is less than the amount of revenue recognized, typically early in the lease, straight-line rent receivable is recorded for the difference. The receivable is depleted during periods later in the lease when the amount of cash paid by the tenant is greater than the amount of revenue recognized.

Prepaid Expenses and Other Assets

Prepaid expenses and other assets primarily include earnest money deposits, escrow accounts held by lenders to pay future real estate taxes, insurance and tenant improvements, notes receivable, nontenant receivables, prepaid taxes, insurance and operating costs, unamortized deferred financing costs related to the line of credit (the "Revolving Credit Facility"), interest rate swaps (when in an asset position), certain corporate assets, and deferred tax assets. Prepaid expenses are recognized over the period to which the good or service relates. Other assets are written off when the asset no longer has future value, or when the company is no longer obligated for the corresponding liability.

Deferred Financing Costs

Deferred financing costs include costs incurred to secure debt from third-party lenders. Deferred financing costs, except for costs related to the Revolving Credit Facility, are presented as a direct reduction to the carrying amount of the related debt for all periods presented. Deferred financing costs related to the Revolving Credit Facility are included in prepaid expenses and other assets. Columbia Property Trust recognized amortization of deferred financing costs for the years ended December 31, 2019, 2018, and 2017 of approximately $2.4 million, $2.9 million, and $2.8 million, respectively, which is included in interest expense in the accompanying consolidated statements of operations.

Deferred Lease Costs

Deferred lease costs include costs incurred to procure leases that are paid to third parties or tenants, and incentives that are provided to tenants under the terms of their leases. These costs are capitalized and amortized on a straight-line basis over the terms of the lease. Amortization of third-party leasing costs is reflected as amortization expense, and amortization of lease incentives is reflected as an adjustment to rental income. During 2019, 2018, and 2017, Columbia Property Trust recognized amortization expense for deferred lease costs of $6.3 million, $5.5 million, and $5.2 million, respectively. During 2019, 2018, and 2017, Columbia Property Trust recognized adjustments to rental income for amortization of deferred lease costs of $0.7 million, $2.1 million, and $3.3 million, respectively. Upon receiving notification of a tenant's intention to terminate a lease, unamortized deferred lease costs are amortized over the shortened lease period.

Accounts Payable, Accrued Expenses, and Accrued Capital Expenditures

Accounts payable, accrued expenses, and accrued capital expenditures primarily include payables related to property operations, capital projects, and interest rate swaps (when in a liability position).

Line of Credit and Notes Payable

When debt is assumed, Columbia Property Trust records the loan at fair value. The fair value adjustment is amortized to interest expense over the term of the loan using the effective interest method. As described in the "Deferred Financing Costs" section above, line of credit and notes payable is presented on the accompanying consolidated balance sheet net of deferred financing costs related to term loans and notes payable of $2.1 million and $2.7 million as of December 31, 2019 and December 31, 2018, respectively.

Bonds Payable

Columbia OP has two series of bonds outstanding as of December 31, 2019 and 2018: $350 million of its 10-year unsecured 3.650% senior notes issued at 99.626% of their face value (the "2026 Bonds Payable"); and $350.0 million of its 10-year unsecured 4.150% senior notes issued at 99.859% of their face value (the "2025 Bonds Payable"). The discount on the 2026 Bonds Payable and the 2025 Bonds Payable is amortized to interest expense over the term of the bonds using the effective-interest method.

As described in the "Deferred Financing Costs" section above, bonds payable are presented on the accompanying consolidated balance sheet net of deferred financing costs related to bonds payable of $3.6 million and $4.2 million as of December 31, 2019 and December 31, 2018, respectively.

Common Stock Repurchase Program

Columbia Property Trust is authorized to repurchase shares of its common stock, par value $0.01 per share, subject to certain limitations. As of December 31, 2019, $166.5 million remains available for repurchases under the current stock repurchase program. See Note 8, Stockholders' Equity and Partner's Capital, for additional details. Common stock repurchases are charged against equity as incurred, and the repurchased shares are retired.

Preferred Stock

Columbia Property Trust is authorized to issue up to 100.0 million shares of one or more classes or series of preferred stock with a par value of $0.01 per share. Columbia Property Trust's board of directors may determine the relative rights, preferences, and privileges of each class or series of preferred stock issued, which may be more beneficial than the rights, preferences, and privileges attributable to Columbia Property Trust's common stock. To date, Columbia Property Trust has not issued any shares of preferred stock.

Common Stock

The par value of Columbia Property Trust's issued and outstanding shares of common stock is classified as common stock, with the remainder allocated to additional paid-in capital.

Distributions

To maintain its status as a REIT, Columbia Property Trust is required by the Internal Revenue Code of 1986, as amended (the "Code"), to make distributions to stockholders each taxable year equal to at least 90% of its REIT taxable income, computed without regard to the dividends-paid deduction and by excluding net capital gains attributable to stockholders ("REIT taxable income"). To the extent that Columbia Property Trust satisfies the distribution requirement but distributes less than 100% of its REIT taxable income, Columbia Property Trust would be subject to federal and state corporate income tax on the undistributed income. Distributions to the stockholders are determined by the board of directors of Columbia Property Trust and are dependent upon a number of factors relating to Columbia Property Trust, including funds available for payment of distributions, financial condition, the timing of property acquisitions, capital expenditure requirements, and annual distribution requirements in order to maintain Columbia Property Trust's status as a REIT under the Code.

Noncontrolling Interests

Noncontrolling interests represent the equity interests of a consolidated joint venture that are not owned by Columbia Property Trust. Noncontrolling interests are adjusted for contributions, distributions, and earnings attributable to the noncontrolling interest holders of the consolidated joint venture. Earnings are allocated to joint venture partners using the hypothetical liquidation at book value method, based on the terms of the respective joint venture agreements, and are recorded as net income (loss) attributable to noncontrolling interests in the accompanying consolidated statements of operations. For 2019, all of Columbia Property Trust's noncontrolling interests relate to 101 Franklin Street, which was acquired on December 2, 2019. For additional information, see Note 3, Real Estate Transactions.

Interest Rate Swap Agreements

Columbia Property Trust enters into interest rate swap contracts to mitigate its interest rate risk on the related financial instruments. Columbia Property Trust does not enter into derivative or interest rate transactions for speculative purposes and currently does not have any derivatives that are not designated as hedges; however, certain of its derivatives may, at times, not qualify for hedge accounting treatment. Columbia Property Trust records the fair value of its interest rate swaps on its consolidated balance sheet either as prepaid expenses and other assets or as accounts payable, accrued expenses, and accrued capital expenditures. Changes in the fair value of interest rate swaps that are designated as cash flow hedges are recorded as other comprehensive income (loss). Changes in the fair value of interest rate swaps that do not qualify for hedge accounting treatment are recorded as gain or loss on interest rate swaps. Amounts received or paid under interest rate swap agreements are recorded as interest expense for contracts that qualify for hedge accounting treatment and as loss on interest rate swaps for contracts

that do not qualify for hedge accounting treatment. As of December 31, 2019, Columbia Property Trust has two interest rate swaps, with an aggregate notional amount of $450.0 million. The following tables provide additional information related to Columbia Property Trust's interest rate swaps as of December 31, 2019 and 2018 (in thousands):

		Estimated Fair Value as of December 31,
Instrument Type	Balance Sheet Classification	2019		2018
Derivatives Designated as Hedging Instruments:
Interest rate contracts	Prepaid expenses and other assets	$	551	$	2,344
Interest rate contracts	Accounts payable	$	1,652	$	—

As a result of the interest rate contract in the above table, Columbia Property Trust estimates recognizing a reduction in interest expense of approximately $0.9 million over the next 12 months.

Columbia Property Trust applied the provisions of ASC 820 in recording its interest rate swaps at fair value. The fair values of the interest rate swaps, classified under Level 2, were determined using a third-party proprietary model that is based on prevailing market data for contracts with matching durations, current and anticipated London Interbank Offered Rate ("LIBOR") information, and reasonable estimates about relevant future market conditions. Columbia Property Trust has determined that the fair value, as determined by the third party, is reasonable.

	Years Ended December 31,
	2019		2018		2017
Market value adjustment to interest rate swaps designated as hedging instruments and included in other comprehensive income (loss)	$	(3,445)	$	1,441	$	1,786

Revenue Recognition

The majority of Columbia Property Trust’s revenues are derived from leases and are reflected as lease revenues on the accompanying consolidated statements of operations. For more information about Columbia Property Trust's lease revenue streams see Note 10, Leases.

In determining when to begin recognizing rental revenues, Columbia Property Trust considers a number of factors, including the nature of the physical improvements made in connection with the lease. When Columbia Property Trust owns the improvements for accounting purposes, revenue recognition generally begins once the improvements are substantially complete and the lessee has taken possession of the improved space. When Columbia Property Trust does not own the improvements for accounting purposes (the lessee is the owner), revenue recognition generally begins once the lessee takes possession of the unimproved space; in these instances, the tenant allowance is accounted for as a lease incentive, which reduces rental revenues over the lease term. When evaluating which party (lessee or lessor) owns the improvements for accounting purposes, Columbia Property Trust considers a number of factors, including, among other things: whether the lease stipulates what the tenant allowance may be used for; whether the lessee or lessor retains legal title to the improvements; the expected economic life of the improvements relative to the lease term; and who directs the construction of the improvements. The determination of who owns the improvements for accounting purposes is subject to significant judgement and is not based on any one factor.

For information about Columbia Property Trust's other revenue streams, please see Note 11, Non-Lease Revenues.

Income Taxes

Columbia Property Trust has elected to be taxed as a REIT under the Code, as amended (the "Code") and has operated as such beginning with its taxable year ended December 31, 2003. To qualify as a REIT, Columbia Property Trust must meet certain organizational and operational requirements, including a requirement to distribute at least 90% of its REIT taxable income, as defined by the Code, to its stockholders. To the extent that Columbia Property Trust satisfies the distribution requirement but distributes less than 100% of its REIT taxable income, Columbia

Property Trust would be subject to federal and state corporate income tax on the undistributed income. Generally, Columbia Property Trust does not incur federal income taxes, other than as described in the following paragraph, because its stockholder distributions typically exceed its taxable income due to noncash expenses such as depreciation. Columbia Property Trust is, however, subject to certain state and local taxes related to the operations of properties in certain locations, which have been provided for in the accompanying consolidated financial statements.

Columbia Property Trust TRS, LLC, Columbia KCP TRS, LLC, and Columbia Energy TRS, LLC (collectively, the "TRS Entities") are wholly owned subsidiaries of Columbia Property Trust and are organized as Delaware limited liability companies. The TRS Entities, among other things, provide tenant services that Columbia Property Trust, as a REIT, cannot otherwise provide. Columbia Property Trust has elected to treat the TRS Entities as taxable REIT subsidiaries. Columbia Property Trust may perform certain additional, noncustomary services for tenants of its buildings through the TRS Entities; however, any earnings related to such services are subject to federal and state income taxes. In addition, for Columbia Property Trust to continue to qualify as a REIT, Columbia Property Trust must limit its investments in taxable REIT subsidiaries to 20% of the value of the total assets. The TRS Entities' deferred tax assets and liabilities represent temporary differences between the financial reporting basis and the tax basis of assets and liabilities based on the enacted rates expected to be in effect when the temporary differences reverse. If applicable, Columbia Property Trust records interest and penalties related to uncertain tax positions as general and administrative expense in the accompanying consolidated statements of operations.

Segment Information

As of December 31, 2019, Columbia Property Trust's reportable segments are determined based on the geographic markets in which it has significant investments. Columbia Property Trust considers geographic location when evaluating its portfolio composition, and in assessing the ongoing operations and performance of its properties (see Note 15, Segment Information).

Reclassification

In accordance with Accounting Standard Codification 360, Property, Plant, and Equipment ("ASC 360"), and in response to the Securities and Exchange Commission's Disclosure Update and Simplification release effective November 5, 2018, gains on sales of real estate assets have been moved to other income (expense) on the consolidated statements of operations for all periods presented.

Recent Accounting Pronouncements

Effective January 1, 2019, Columbia Property Trust adopted Accounting Standard Codification 842, Leases ("ASC 842"), which amends the lease accounting rules with the following key changes:

•Lessees are required to record a right-of-use asset and a lease liability for all leases, as defined, with a term of greater than 12 months, and to classify such leases as either finance or operating leases based on the principle of whether or not the lease is effectively a financed purchase of the leased asset by the lessee, or not. This classification will determine whether the lease expense is recognized using the effective interest method (finance leases) or on a straight-line basis over the term of the lease (operating leases).

•Lessors are required to account for leases using an approach that is substantially similar to the pre-existing rules for operating leases, sales-type leases, and direct financing leases, with a few targeted changes, including that: (i) lessors are no longer permitted to capitalize and amortize initial indirect costs incurred to obtain a lease, and (ii) provisions for uncollectible tenant receivables are reflected as a reduction to lease revenues, instead of as general and administrative expense.

In connection with transitioning to ASC 842, Columbia Property Trust elected to use certain practical expedients which impact Columbia Property Trust as follows:

•Prospective implementation. In-place contracts retain their character as to whether they meet the definition of a lease or not; in-place leases retain their classification as an operating, sales-type, or direct financing lease; and prior-period accounting and presentation is unchanged.

•Rental income and tenant reimbursements for operating leases are combined in a single line on the statements of operations for all periods presented.

•Leases with a term of 12 months or less are expensed as incurred, as provided for in a practical expedient elected by Columbia Property Trust.

See Note 10, Leases, for additional information.

Accounting Standard Update 2018-13, Fair Value Measurement: Disclosure Framework – Changes to the Disclosure Requirements for Fair Value Measurement ("ASU 2018-13"), which will be effective for Columbia Property Trust on January 1, 2020, expands the disclosure requirements related to a change in fair value technique hierarchy. ASU 2018-13 is not expected to have a material impact on Columbia Property Trust's consolidated financial statements or disclosures.

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Leases

12 Months Ended

Dec. 31, 2019

Leases [Abstract]

Leases

Leases

Columbia Property Trust as Lessee

Columbia Property Trust is a lessee with respect to ground leases at certain of its investment properties, office space leases, and various information technology equipment leases. Operating lease assets represent Columbia Property Trust's right to use the underlying asset over the lease term, and operating lease liabilities represent Columbia Property Trust's obligation to make lease payments over the lease term. Operating lease liabilities are measured as the present value of lease payments over the lease term. As most of Columbia Property Trust's leases do not provide an implicit rate, Columbia Property Trust uses its incremental borrowing rate, based on information available at commencement, to calculate the present value of lease payments. Lease term extensions are included in the operating lease liability when it is reasonably certain that they will be exercised. Any variable payments for non-lease services provided under leases are expensed as incurred. Operating lease assets are measured based on the corresponding operating lease liability amount, reduced for lease incentives. At adoption of ASC 842, straight-line rent payable (receivable) balances and intangible lease asset (liability) balances were reclassified to the corresponding right of use assets. Operating lease expense is recognized on a straight-line basis over the lease term, and is recorded as property operating costs for ground leases and as general and administrative – corporate for all other operating leases. Contracts are evaluated at commencement to determine if the contract contains a lease, and the appropriate classification for such leases.

As of December 31, 2019, Columbia Property Trust has one ground lease with a remaining lease term of 58.0 years, inclusive of renewal options, which is included in operating lease assets of $29.5 million. Payments for all future periods under this ground lease have already been made. Thus, as of December 31, 2019, operating lease liabilities of $2.2 million include only the present value of future payments due under an office lease, which has a remaining lease term of 3.0 years.

As of December 31, 2019, the future minimum lease payments to be made by Columbia Property Trust under its operating lease are as follows (in thousands):

2020	$	728
2021	760
2022	793
2023	67
2024	—
Thereafter	—
Total lease payments	2,348
Less: interest expense	(162)
Present value of lease liabilities	$	2,186
Weighted-average remaining lease term (years)	3.1 years
Weighted-average discount rate	4.5		%

Columbia Property Trust's operating leases had the following impacts on the consolidated balance sheet as of December 31, 2019 (in thousands):

	Ground Leases		Office Lease		Total Operating Leases
Assets:
Total operating lease assets	$	27,843	$	1,627	$	29,470
Liabilities:
Total operating lease liabilities	$	—	$	2,186	$	2,186

Columbia Property Trust's operating leases had the following impacts on the consolidated statements of operations for 2019 (in thousands):

	Ground Leases		Office Lease		Total Operating Leases
Property operating costs	$	2,165	$	—	$	2,165
General and administrative – corporate	—		580		580
Total operating lease expenses	$	2,165	$	580	$	2,745

Columbia Property Trust's operating leases had the following impacts on the consolidated statements of cash flows for the 2019 (in thousands):

	Ground Leases		Office Lease		Total Operating Leases
Cash paid for operating lease liabilities included in cash flows from operations	$	(1,329)	$	(697)	$	(2,026)

Columbia Property Trust as Lessor

Columbia Property Trust owns and leases commercial real estate, primarily office space, to tenants under operating leases for specified periods of time. Some of Columbia Property Trust's leases contain extension and/or termination options; however, the exercise of these extensions or terminations is at the discretion of the tenant and subject to negotiations. Therefore, such options are only recognized once they are deemed reasonably certain, typically at the time the option is exercised. Rental income related to such leases is recognized on a straight-line basis over the remaining lease period, and is included in lease revenues on the consolidated statements of operations. If at any point during the term of a lease, it is determined that the collectability of a tenant receivable is not probable, such receivable is written off against lease revenues. Contracts are evaluated at commencement to determine if the contract contains a lease, as defined by ASC 842, and the appropriate classification for such leases. In making this determination, Columbia Property Trust evaluates, among other things, whether the customer has the right to control the use of the identified asset. As of December 31, 2019, the weighted-average remaining term for such leases is approximately 7.4 years.

Lease revenues include fixed and variable payments. Fixed payments primarily relate to base rent and include payments related to lease termination fees; and variable payments primarily relate to tenant reimbursements for certain property operating costs. Lease termination fees are recognized on a straight-line basis from the point at which Columbia Property Trust receives notification of termination until the date the tenant loses the right to lease the space and Columbia Property Trust has satisfied all obligations under the lease or termination agreement. During 2019, 2018, and 2017, Columbia Property Trust earned lease termination fees of $0.4 million, $2.2 million, and $0.4 million, respectively. Fixed and variable payments for 2019 are as follows (in thousands):

Fixed payments	$	250,077
Variable payments	26,072
Total lease revenues	$	276,149

As of December 31, 2019, the future minimum fixed lease payments due to Columbia Property Trust under non-cancelable operating leases are as follows (thousands):

2020	$	223,249
2021	224,999
2022	216,210
2023	205,955
2024	197,846
Thereafter	1,028,119
Total	$	2,096,378

Leases

Leases

Columbia Property Trust as Lessee

Columbia Property Trust is a lessee with respect to ground leases at certain of its investment properties, office space leases, and various information technology equipment leases. Operating lease assets represent Columbia Property Trust's right to use the underlying asset over the lease term, and operating lease liabilities represent Columbia Property Trust's obligation to make lease payments over the lease term. Operating lease liabilities are measured as the present value of lease payments over the lease term. As most of Columbia Property Trust's leases do not provide an implicit rate, Columbia Property Trust uses its incremental borrowing rate, based on information available at commencement, to calculate the present value of lease payments. Lease term extensions are included in the operating lease liability when it is reasonably certain that they will be exercised. Any variable payments for non-lease services provided under leases are expensed as incurred. Operating lease assets are measured based on the corresponding operating lease liability amount, reduced for lease incentives. At adoption of ASC 842, straight-line rent payable (receivable) balances and intangible lease asset (liability) balances were reclassified to the corresponding right of use assets. Operating lease expense is recognized on a straight-line basis over the lease term, and is recorded as property operating costs for ground leases and as general and administrative – corporate for all other operating leases. Contracts are evaluated at commencement to determine if the contract contains a lease, and the appropriate classification for such leases.

As of December 31, 2019, Columbia Property Trust has one ground lease with a remaining lease term of 58.0 years, inclusive of renewal options, which is included in operating lease assets of $29.5 million. Payments for all future periods under this ground lease have already been made. Thus, as of December 31, 2019, operating lease liabilities of $2.2 million include only the present value of future payments due under an office lease, which has a remaining lease term of 3.0 years.

As of December 31, 2019, the future minimum lease payments to be made by Columbia Property Trust under its operating lease are as follows (in thousands):

2020	$	728
2021	760
2022	793
2023	67
2024	—
Thereafter	—
Total lease payments	2,348
Less: interest expense	(162)
Present value of lease liabilities	$	2,186
Weighted-average remaining lease term (years)	3.1 years
Weighted-average discount rate	4.5		%

Columbia Property Trust's operating leases had the following impacts on the consolidated balance sheet as of December 31, 2019 (in thousands):

	Ground Leases		Office Lease		Total Operating Leases
Assets:
Total operating lease assets	$	27,843	$	1,627	$	29,470
Liabilities:
Total operating lease liabilities	$	—	$	2,186	$	2,186

Columbia Property Trust's operating leases had the following impacts on the consolidated statements of operations for 2019 (in thousands):

	Ground Leases		Office Lease		Total Operating Leases
Property operating costs	$	2,165	$	—	$	2,165
General and administrative – corporate	—		580		580
Total operating lease expenses	$	2,165	$	580	$	2,745

Columbia Property Trust's operating leases had the following impacts on the consolidated statements of cash flows for the 2019 (in thousands):

	Ground Leases		Office Lease		Total Operating Leases
Cash paid for operating lease liabilities included in cash flows from operations	$	(1,329)	$	(697)	$	(2,026)

Columbia Property Trust as Lessor

Columbia Property Trust owns and leases commercial real estate, primarily office space, to tenants under operating leases for specified periods of time. Some of Columbia Property Trust's leases contain extension and/or termination options; however, the exercise of these extensions or terminations is at the discretion of the tenant and subject to negotiations. Therefore, such options are only recognized once they are deemed reasonably certain, typically at the time the option is exercised. Rental income related to such leases is recognized on a straight-line basis over the remaining lease period, and is included in lease revenues on the consolidated statements of operations. If at any point during the term of a lease, it is determined that the collectability of a tenant receivable is not probable, such receivable is written off against lease revenues. Contracts are evaluated at commencement to determine if the contract contains a lease, as defined by ASC 842, and the appropriate classification for such leases. In making this determination, Columbia Property Trust evaluates, among other things, whether the customer has the right to control the use of the identified asset. As of December 31, 2019, the weighted-average remaining term for such leases is approximately 7.4 years.

Lease revenues include fixed and variable payments. Fixed payments primarily relate to base rent and include payments related to lease termination fees; and variable payments primarily relate to tenant reimbursements for certain property operating costs. Lease termination fees are recognized on a straight-line basis from the point at which Columbia Property Trust receives notification of termination until the date the tenant loses the right to lease the space and Columbia Property Trust has satisfied all obligations under the lease or termination agreement. During 2019, 2018, and 2017, Columbia Property Trust earned lease termination fees of $0.4 million, $2.2 million, and $0.4 million, respectively. Fixed and variable payments for 2019 are as follows (in thousands):

Fixed payments	$	250,077
Variable payments	26,072
Total lease revenues	$	276,149

As of December 31, 2019, the future minimum fixed lease payments due to Columbia Property Trust under non-cancelable operating leases are as follows (thousands):

2020	$	223,249
2021	224,999
2022	216,210
2023	205,955
2024	197,846
Thereafter	1,028,119
Total	$	2,096,378