10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

____________________________________________________________________________

FORM 10-Q

____________________________________________________________________________

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

For the Quarterly Period Ended March 31, 2018

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 1-34907

____________________________________________________________________________

STAG INDUSTRIAL, INC.

(Exact name of registrant as specified in its charter)

____________________________________________________________________________

Maryland	27-3099608
(State or other jurisdiction of incorporation or organization)	(IRS Employer Identification No.)
One Federal Street, 23rd Floor Boston, Massachusetts	02110
(Address of principal executive offices)	(Zip Code)

(617) 574-4777

(Registrant’s telephone number, including area code)

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.  Yes x  No ¨

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted 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 and post such files).  Yes x  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,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer x	Accelerated filer ¨
Non-accelerated filer ¨	Smaller reporting company ¨
(Do not check if a smaller reporting company)
	Emerging growth company ¨

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. ¨

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).  Yes ¨  No x

Indicate the number of shares outstanding of each of the issuer’s classes of common and preferred stock as of the latest practicable date.

Class	Outstanding at April 30, 2018
Common Stock ($0.01 par value)	97,233,361
6.625% Series B Cumulative Redeemable Preferred Stock ($0.01 par value)	2,800,000
6.875% Series C Cumulative Redeemable Preferred Stock ($0.01 par value)	3,000,000

STAG INDUSTRIAL, INC.

Table of Contents 

PART I.	Financial Information	3
Item 1.	Financial Statements (unaudited)	3
	Consolidated Balance Sheets as of March 31, 2018 and December 31, 2017	3
	Consolidated Statements of Operations for the Three Months Ended March 31, 2018 and 2017	4
	Consolidated Statements of Comprehensive Income for the Three Months Ended March 31, 2018 and 2017	5
	Consolidated Statements of Equity for the Three Months Ended March 31, 2018 and 2017	6
	Consolidated Statements of Cash Flows for the Three Months Ended March 31, 2018 and 2017	7
	Notes to Consolidated Financial Statements	8
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	23
Item 3.	Quantitative and Qualitative Disclosures about Market Risk	38
Item 4.	Controls and Procedures	38
PART II.	Other Information	39
Item 1.	Legal Proceedings	39
Item 1A.	Risk Factors	39
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	39
Item 3.	Defaults Upon Senior Securities	39
Item 4.	Mine Safety Disclosures	39
Item 5.	Other Information	39
Item 6.	Exhibits	40
	SIGNATURES	41

2

Part I. Financial Information

Item 1.  Financial Statements

STAG Industrial, Inc.

Consolidated Balance Sheets

(unaudited, in thousands, except share data)

	March 31, 2018			December 31, 2017
Assets
Rental Property:
Land	$	324,734		$	321,560
Buildings and improvements, net of accumulated depreciation of $266,158 and $249,057, respectively	1,958,432			1,932,764
Deferred leasing intangibles, net of accumulated amortization of $215,597 and $280,642, respectively	305,188			313,253
Total rental property, net	2,588,354			2,567,577
Cash and cash equivalents	10,455			24,562
Restricted cash	7,259			3,567
Tenant accounts receivable, net	34,013			33,602
Prepaid expenses and other assets	29,776			25,364
Interest rate swaps	12,577			6,079
Assets held for sale, net	13,498			19,916
Total assets	$	2,695,932		$	2,680,667
Liabilities and Equity
Liabilities:
Unsecured credit facility	$	218,000		$	271,000
Unsecured term loans, net	521,506			446,265
Unsecured notes, net	398,226			398,234
Mortgage notes, net	57,851			58,282
Accounts payable, accrued expenses and other liabilities	38,294			43,216
Interest rate swaps	—			1,217
Tenant prepaid rent and security deposits	21,876			19,045
Dividends and distributions payable	14,460			11,880
Deferred leasing intangibles, net of accumulated amortization of $11,321 and $13,555, respectively	20,720			21,221
Total liabilities	1,290,933			1,270,360
Commitments and contingencies (Note 10)
Equity:
Preferred stock, par value $0.01 per share, 15,000,000 shares authorized,
Series B, 2,800,000 shares (liquidation preference of $25.00 per share) issued and outstanding at March 31, 2018 and December 31, 2017	70,000			70,000
Series C, 3,000,000 shares (liquidation preference of $25.00 per share) issued and outstanding at March 31, 2018 and December 31, 2017	75,000			75,000
Common stock, par value $0.01 per share, 150,000,000 shares authorized, 97,229,588 and 97,012,543 shares issued and outstanding at March 31, 2018 and December 31, 2017, respectively	972			970
Additional paid-in capital	1,724,627			1,725,825
Common stock dividends in excess of earnings	(530,257		)	(516,691		)
Accumulated other comprehensive income	11,581			3,936
Total stockholders’ equity	1,351,923			1,359,040
Noncontrolling interest	53,076			51,267
Total equity	1,404,999			1,410,307
Total liabilities and equity	$	2,695,932		$	2,680,667

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

3

STAG Industrial, Inc.

Consolidated Statements of Operations

(unaudited, in thousands, except per share data)

	Three months ended March 31,
	2018			2017
Revenue
Rental income	$	69,928		$	59,222
Tenant recoveries	13,199			10,185
Other income	156			73
Total revenue	83,283			69,480
Expenses
Property	17,499			13,276
General and administrative	8,748			8,771
Property acquisition costs	—			740
Depreciation and amortization	39,965			35,953
Loss on impairments	2,934			—
Loss on involuntary conversion	—			330
Other expenses	291			194
Total expenses	69,437			59,264
Other income (expense)
Interest expense	(11,386		)	(10,472		)
Gain on the sales of rental property, net	22,689			325
Total other income (expense)	11,303			(10,147		)
Net income	$	25,149		$	69
Less: income (loss) attributable to noncontrolling interest after preferred stock dividends	954			(103		)
Net income attributable to STAG Industrial, Inc.	$	24,195		$	172
Less: preferred stock dividends	2,448			2,448
Less: amount allocated to participating securities	71			83
Net income (loss) attributable to common stockholders	$	21,676		$	(2,359	)
Weighted average common shares outstanding — basic	97,021			81,808
Weighted average common shares outstanding — diluted	97,323			81,808
Net income (loss) per share — basic and diluted
Net income (loss) per share attributable to common stockholders — basic	$	0.22		$	(0.03	)
Net income (loss) per share attributable to common stockholders — diluted	$	0.22		$	(0.03	)

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

4

STAG Industrial, Inc.

Consolidated Statements of Comprehensive Income

(unaudited, in thousands)

	Three months ended March 31,
	2018			2017
Net income	$	25,149		$	69
Other comprehensive income:
Income on interest rate swaps	7,723			1,212
Other comprehensive income	7,723			1,212
Comprehensive income	32,872			1,281
(Income) loss attributable to noncontrolling interest after preferred stock dividends	(954		)	103
Other comprehensive income attributable to noncontrolling interest	(325		)	(52		)
Comprehensive income attributable to STAG Industrial, Inc.	$	31,593		$	1,332

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

5

STAG Industrial, Inc.

ConsolidatedStatements of Equity

(unaudited, in thousands, except share data)

	Preferred Stock			Common Stock			Additional Paid-in Capital			Common Stock Dividends in excess of Earnings			Accumulated Other Comprehensive Income (Loss)			Total Stockholders' Equity			Noncontrolling Interest - Unit holders in Operating Partnership			Total Equity
				Shares	Amount
Three months ended March 31, 2018
Balance, December 31, 2017	$	145,000		97,012,543	$	970	$	1,725,825		$	(516,691	)	$	3,936		$	1,359,040		$	51,267		$	1,410,307
Cash flow hedging instruments cumulative effect adjustment (Note 2)	—			—	—		—			(258		)	247			(11		)	11			—
Offering costs	—			—	—		(107		)	—			—			(107		)	—			(107		)
Dividends and distributions, net	(2,448		)	—	—		—			(34,518		)	—			(36,966		)	(1,813		)	(38,779		)
Non-cash compensation activity, net	—			71,373	1		(855		)	(537		)	—			(1,391		)	2,097			706
Redemption of common units to common stock	—			145,672	1		1,823			—			—			1,824			(1,824		)	—
Rebalancing of noncontrolling interest	—			—	—		(2,059		)	—			—			(2,059		)	2,059			—
Other comprehensive income	—			—	—		—			—			7,398			7,398			325			7,723
Net income	2,448			—	—		—			21,747			—			24,195			954			25,149
Balance, March 31, 2018	$	145,000		97,229,588	$	972	$	1,724,627		$	(530,257	)	$	11,581		$	1,351,923		$	53,076		$	1,404,999
Three months ended March 31, 2017
Balance, December 31, 2016	$	145,000		80,352,304	$	804	$	1,293,706		$	(410,978	)	$	(1,496	)	$	1,027,036		$	39,890		$	1,066,926
Proceeds from sales of common stock	—			2,843,907	28		68,515			—			—			68,543			—			68,543
Offering costs	—			—	—		(1,068		)	—			—			(1,068		)	—			(1,068		)
Dividends and distributions, net	(2,448		)	—	—		—			(28,881		)	—			(31,329		)	(1,814		)	(33,143		)
Non-cash compensation activity, net	—			37,353	—		454			(194		)	—			260			1,171			1,431
Redemption of common units to common stock	—			145,029	1		1,592			—			—			1,593			(1,593		)	—
Rebalancing of noncontrolling interest	—			—	—		(2,248		)	—			—			(2,248		)	2,248			—
Other comprehensive income	—			—	—		—			—			1,160			1,160			52			1,212
Net income	2,448			—	—		—			(2,276		)	—			172			(103		)	69
Balance, March 31, 2017	$	145,000		83,378,593	$	833	$	1,360,951		$	(442,329	)	$	(336	)	$	1,064,119		$	39,851		$	1,103,970

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

6

STAG Industrial, Inc.

Consolidated Statements of Cash Flows

(unaudited, in thousands)

	Three months ended March 31,
	2018			2017
Cash flows from operating activities:
Net income	$	25,149		$	69
Adjustment to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	39,965			35,953
Loss on impairments	2,934			—
Loss on involuntary conversion	—			330
Non-cash portion of interest expense	534			345
Intangible amortization in rental income, net	1,207			1,296
Straight-line rent adjustments, net	(2,781		)	(967		)
Dividends on forfeited equity compensation	7			1
Gain on the sales of rental property, net	(22,689		)	(325		)
Non-cash compensation expense	2,220			2,387
Change in assets and liabilities:
Tenant accounts receivable, net	848			157
Prepaid expenses and other assets	(5,531		)	(5,723		)
Accounts payable, accrued expenses and other liabilities	(2,720		)	(4,457		)
Tenant prepaid rent and security deposits	2,831			2,342
Total adjustments	16,825			31,339
Net cash provided by operating activities	41,974			31,408
Cash flows from investing activities:
Acquisitions of land and buildings and improvements	(67,077		)	(84,689		)
Additions of land and building and improvements	(6,317		)	(6,015		)
Proceeds from sales of rental property, net	49,631			3,919
Proceeds from insurance on involuntary conversion	—			439
Acquisition deposits, net	(605		)	(645		)
Acquisitions of deferred leasing intangibles	(11,744		)	(15,098		)
Net cash used in investing activities	(36,112		)	(102,089		)
Cash flows from financing activities:
Proceeds from unsecured credit facility	110,000			141,000
Repayment of unsecured credit facility	(163,000		)	(98,000		)
Proceeds from unsecured term loans	75,000			—
Repayment of mortgage notes	(462		)	(12,167		)
Payment of loan fees and costs	(3		)	(35		)
Dividends and distributions	(36,200		)	(32,723		)
Proceeds from sales of common stock	—			68,543
Repurchase and retirement of share-based compensation	(1,524		)	(969		)
Offering costs	(88		)	(971		)
Net cash provided by (used in) financing activities	(16,277		)	64,678
Decrease in cash and cash equivalents and restricted cash	(10,415		)	(6,003		)
Cash and cash equivalents and restricted cash—beginning of period	28,129			21,805
Cash and cash equivalents and restricted cash—end of period	$	17,714		$	15,802
Supplemental disclosure:
Cash paid for interest, net of capitalized interest	$	11,057		$	10,568
Supplemental schedule of non-cash investing and financing activities
Additions to building and other capital improvements	$	—		$	(503	)
Partial disposal of building due to involuntary conversion of building	$	—		$	221
Investing other receivables due to involuntary conversion of building	$	—		$	(221	)
Change in additions of land, building, and improvements included in accounts payable, accrued expenses, and other liabilities	$	1,908		$	1,385
Additions to building and other capital improvements from non-cash compensation	$	(4	)	$	(7	)
Change in loan fees, costs, and offering costs included in accounts payable, accrued expenses, and other liabilities	$	(90	)	$	(67	)
Dividends and distributions accrued	$	14,460		$	10,149

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

7

STAG Industrial, Inc.

Notes to Consolidated Financial Statements

(unaudited)

1. OrganizationandDescription of Business

STAG Industrial, Inc. (the “Company”) is an industrial real estate operating company focused on the acquisition and operation of single-tenant, industrial properties throughout the United States. The Company was formed as a Maryland corporation and has elected to be treated and intends to continue to qualify as a real estate investment trust (“REIT”) under Sections 856 through 860 of the Internal Revenue Code of 1986, as amended. The Company is structured as an umbrella partnership REIT, commonly called an UPREIT, and owns substantially all of its assets and conducts substantially all of its business through its operating partnership, STAG Industrial Operating Partnership, L.P., a Delaware limited partnership (the “Operating Partnership”). As of March 31, 2018 and December 31, 2017, the Company owned a 95.8% and 95.9%, respectively, common equity interest in the Operating Partnership. The Company, through its wholly owned subsidiary, is the sole general partner of the Operating Partnership. As used herein, the “Company” refers to STAG Industrial, Inc. and its consolidated subsidiaries and partnerships, including the Operating Partnership, except where context otherwise requires.

As of March 31, 2018, the Company owned 360 buildings in 37 states with approximately 70.8 million rentable square feet, consisting of 291 warehouse/distribution buildings, 55 light manufacturing buildings, and 14 flex/office buildings. The Company’s buildings were approximately 94.7% leased to 312 tenants as of March 31, 2018.

2. Summary of Significant Accounting Policies

Interim Financial Information

The accompanying interim financial statements have been presented in conformity with accounting principles generally accepted in the United States of America (“GAAP”) and with the instructions to Form 10-Q and Regulation S-X for interim financial information. Accordingly, these statements do not include all of the information and notes required by GAAP for complete financial statements. In the opinion of management, the accompanying interim financial statements include all adjustments, consisting of normal recurring items, necessary for their fair statement in conformity with GAAP. Interim results are not necessarily indicative of results for a full year. The year-end consolidated balance sheet data was derived from audited financial statements, but does not include all disclosures required by GAAP. The information included in this Quarterly Report on Form 10-Q should be read in conjunction with the Company’s consolidated financial statements and notes thereto contained in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2017.

Basis of Presentation

The Company’s consolidated financial statements include the accounts of the Company, the Operating Partnership and their subsidiaries. Interests in the Operating Partnership not owned by the Company are referred to as “Noncontrolling Common Units.” These Noncontrolling Common Units are held by other limited partners in the form of common units (“Other Common Units”) and long term incentive plan units (“LTIP units”) issued pursuant to the STAG Industrial, Inc. 2011 Equity Incentive Plan, as amended (the “2011 Plan”). All significant intercompany balances and transactions have been eliminated in the consolidation of entities. The financial statements of the Company are presented on a consolidated basis for all periods presented.

Reclassifications and New Accounting Standards

Certain prior year amounts have been reclassified to conform to the current year presentation.

New Accounting Standards Adopted

In August 2017, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2017-12, Derivatives and Hedging (Topic 815):Targeted Improvements to Accounting for Hedging Activities. The purpose of this updated guidance is to better align a company’s financial reporting for hedging activities with the economic objectives of those activities. This standard is effective for fiscal years beginning after December 15, 2018 and interim periods within those years, with early adoption permitted, and the Company adopted this standard effective January 1, 2018 using the modified retrospective transition method. The adoption of this standard resulted in a cumulative effect adjustment of approximately $0.3 million recorded as an increase to common stock dividends in excess of earnings and an increase to accumulated other comprehensive income as of January 1, 2018 in the accompanying Consolidated Statements of Equity.

8

In May 2017, the FASB issued ASU 2017-09, Stock Compensation (Topic 718): Scope of Modification Accounting, which provides updated guidance about which changes to the terms or conditions of a share-based payment award would require an entity to apply modification accounting under the topic. This standard is effective for fiscal years beginning after December 15, 2017 and interim periods within those years, and the Company adopted this standard prospectively effective January 1, 2018. The adoption of this standard did not have a material effect on the Company's consolidated financial statements.

In February 2017, the FASB issued ASU 2017-05, Other Income - Gains and Losses from the Derecognition of Nonfinancial Assets (Subtopic 610-20): Clarifying the Scope of Asset Derecognition Guidance and Accounting for Partial Sales of Nonfinancial Assets, which provides guidance for recognizing gains and losses from the transfer of nonfinancial assets in contracts with non-customers. The new standard was issued as part of the new revenue standard (ASU 2014-09, as discussed below), and defines “in substance nonfinancial asset,” unifies guidance related to partial sales of nonfinancial assets, eliminates rules specifically addressing sales of real estate, removes exceptions to the financial asset derecognition model, and clarifies the accounting for contributions of nonfinancial assets to joint ventures. As a result of the new guidance, the guidance specific to real estate sales in Subtopic 360-20 was eliminated, and sales and partial sales of real estate assets will now be subject to the same derecognition model as all other nonfinancial assets. This standard is effective at the same time an entity adopts ASU 2014-09, which the Company adopted effective January 1, 2018. The Company adopted this standard effective January 1, 2018 using the modified retrospective approach. The adoption of this standard did not have a material effect on the Company's consolidated financial statements.

In January 2017, the FASB issued ASU 2017-01, Business Combinations (Topic 805): Clarifying the Definition of a Business. The new standard provides a screen to determine when a set of assets and activities is not a business. The screen requires that when substantially all of the fair value of the gross assets acquired or disposed of is concentrated in a single identifiable asset or a group of similar identifiable assets, the set is not a business. This standard is effective for annual periods beginning after December 15, 2017 and interim periods within those periods, and the Company adopted this standard prospectively effective January 1, 2018. As a result, it is expected that the majority of the Company's acquisitions will be accounted for as asset acquisitions, whereas under the former guidance the majority of the Company's acquisitions had been accounted for as business combinations. The most significant difference between the two accounting models that impacts the Company's consolidated financial statements is that in an asset acquisition, property acquisition costs are generally a component of the consideration transferred to acquire a group of assets and are capitalized as a component of the cost of the assets, whereas in a business combination, property acquisition costs are expensed and not included as part of the consideration transferred.

In November 2016, the FASB issued ASU 2016-18, Statement of Cash Flows (Topic 230): Restricted Cash.The new standard requires that the statement of cash flows explain the changes during the period in the total of cash, cash equivalents, and amounts generally described as restricted cash or restricted cash equivalents. This standard is effective for fiscal years beginning after December 15, 2017 and the Company adopted this standard effective January 1, 2018. As a result, the Company has included restricted cash with cash and cash equivalents when reconciling the beginning and end of period total amounts on the accompanying Consolidated Statements of Cash Flows. The effects of this standard were applied retrospectively to all prior periods presented. For the three months ended March 31, 2017, the effect of the change in accounting principle was an increase in cash provided by operating activities of approximately $0.3 million and an increase in cash used in investing activities of approximately $1.1 million on the accompanying Consolidated Statements of Cash Flows.

In January 2016, the FASB issued ASU 2016-01, Recognition and Measurement of Financial Assets and Financial Liabilities (Subtopic 825-10). The amendments in ASU 2016-01 address certain aspects of recognition, measurement, presentation, and disclosure of financial instruments. The standard primarily affects the accounting for equity investments, financial liabilities under the fair value option, and the presentation and disclosure requirements for financial instruments. ASU 2016-01 is effective for the annual periods beginning after December 31, 2017 and for annual periods and interim periods within those years, and the Company adopted this standard prospectively effective January 1, 2018. The adoption of this standard did not have a material effect on the Company's consolidated financial statements.

In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers(Topic 606). ASU 2014-09 is a comprehensive new revenue recognition model requiring a company to recognize revenue to depict the transfer of goods or services to a customer at an amount reflecting the consideration it expects to receive in exchange for those goods or services. While lease contracts with customers, which constitute a vast majority of the Company's revenues, are specifically excluded from the model's scope, certain of the Company's revenue streams may be impacted by the new guidance. Once the new guidance setting forth principles for the recognition, measurement, presentation and disclosure of leases (ASU 2016-02, as discussed below) goes into effect, the new revenue standard may apply to executory costs and other components of revenue due under leases that are deemed to be non-lease components (such as common area maintenance and provision of utilities), even when the revenue for such activities is not separately stipulated in the lease. In that case, revenue from these items previously recognized on a straight-line basis under current lease guidance would be recognized under the new revenue guidance as the related services are delivered. As a result,

9

while the total revenue recognized over time would not differ under the new guidance, the recognition pattern may be different. The Company is in the process of evaluating the significance of the difference in the recognition pattern that would result from this change upon the adoption of ASU 2016-02 on January 1, 2019. Additionally, the new revenue guidance requires improved disclosures regarding the nature, amount, timing and uncertainty of revenue and cash flows arising from contracts with customers. The Company adopted this standard effective January 1, 2018 using the modified retrospective approach. The adoption of this standard did not have a material effect on the Company's consolidated financial statements.

New Accounting Standards Issued but not yet Adopted

In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842), which sets out the principles for the recognition, measurement, presentation and disclosure of leases for both parties to a contract (i.e. lessees and lessors). Topic 842 supersedes the previous leases standard, Topic 840, Leases. The new standard requires lessees to apply a dual approach, classifying leases as either finance or operating leases based on the principle of whether or not the lease is effectively a financed purchase by the lessee. This classification will determine whether lease expense is recognized based on an effective interest method or on a straight line basis over the term of the lease, respectively. A lessee is also required to record a right-of-use asset and a lease liability for all leases with a term of greater than 12 months regardless of their classification. Leases with a term of 12 months or less will be accounted for similar to existing guidance for operating leases today. The new standard requires lessors to account for leases using an approach that is substantially equivalent to existing guidance for sales-type leases, direct financing leases and operating leases. ASU 2016-02 is expected to impact the Company’s consolidated financial statements as the Company has certain operating and land lease arrangements for which it is the lessee, which will result in the recording of a right of use asset and the related lease liability. The standard is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years, with early adoption permitted. The new standard must be adopted using a modified retrospective transition and will require application of the new guidance at the beginning of the earliest comparative period. The Company is currently in the process of evaluating the impact the adoption of ASU 2016-02 will have on the Company’s financial position or results of operations, and plans to adopt this standard effective January 1, 2019.

Restricted Cash

Restricted cash may include tenant security deposits and cash held in escrow for real estate taxes and capital improvements as required in various mortgage note agreements. Restricted cash also may include amounts held by the Company’s transfer agent for preferred stock dividends that are distributed subsequent to period end. The following table presents a reconciliation of cash and cash equivalents and restricted cash reported on the accompanying Consolidated Balance Sheets to amounts reported on the accompanying Consolidated Statements of Cash Flows (in thousands).

	As of March 31,
	2018		2017
Cash and cash equivalents	$	10,455	$	7,082
Restricted cash	7,259		8,720
Total cash and cash equivalents and restricted cash	$	17,714	$	15,802

Tenant Accounts Receivable, net

As of March 31, 2018 and December 31, 2017, the Company had an allowance for doubtful accounts of approximately $0.1 million and $0.1 million, respectively.

As of March 31, 2018 and December 31, 2017, the Company had accrued rental income, net of allowance of approximately $25.9 million and $24.7 million, respectively. As of March 31, 2018 and December 31, 2017, the Company had an allowance on accrued rental income of $0.1 million and $0.2 million, respectively.

As of March 31, 2018 and December 31, 2017, the Company had approximately $12.7 million and $12.7 million, respectively, of total lease security deposits available in the form of existing letters of credit, which are not reflected on the accompanying Consolidated Balance Sheets. As of March 31, 2018 and December 31, 2017, the Company had approximately $7.7 million and $7.4 million, respectively, of lease security deposits available in cash, which are included in cash and cash equivalents on the accompanying Consolidated Balance Sheets, and approximately $0.7 million and $0.7 million, respectively, of lease security deposits available in cash, which are included in restricted cash on the accompanying Consolidated Balance Sheets. These funds may be used to settle tenant accounts receivables in the event of a default under the related lease. As of March 31, 2018 and December 31, 2017, the Company's total liability associated with these lease security deposits was approximately $8.4 million and $8.1 million, respectively, and is included in tenant prepaid rent and security deposits on the accompanying Consolidated Balance Sheets.

10

Related Parties

As of March 31, 2018 and December 31, 2017, the Company had approximately $4,000 and $0, respectively, of amounts due from related parties, which are included in prepaid expenses and other assets on the accompanying Consolidated Balance Sheets.

Revenue Recognition

Tenant Recoveries

The Company estimates that real estate taxes, which are the responsibility of certain tenants under the terms of their leases and are not reflected on the Company's consolidated financial statements, were approximately $3.1 million and $3.1 million for the three months ended March 31, 2018 and 2017, respectively. These amounts would have been the maximum real estate tax expense of the Company, excluding any penalties or interest, had the tenants not met their contractual obligations for these periods.

Termination Income

Approximately $0.1 million and $39,000 of termination fee income related to the Buena Vista, VA property, the tenant at which exercised its early lease termination option on March 27, 2017, is included in rental income on the accompanying Consolidated Statements of Operations for the three months ended March 31, 2018 and 2017, respectively.

Gain on the Sales of Rental Property, net

The timing of the derecognition of a rental property and the corresponding recognition of gain on the sales of rental property, net is measured by various criteria related to the terms of the sale transaction, and if the Company has lost control of the property and the acquirer has gained control of the property after the transaction. If the derecognition criteria is met, the full gain is recognized.

Taxes

Federal Income Taxes

The Company's taxable REIT subsidiaries recognized a net loss of approximately $36,000 and $31,000 for the three months ended March 31, 2018 and 2017, respectively, which has been included on the accompanying Consolidated Statements of Operations.

State and Local Income, Excise, and Franchise Tax

State and local income, excise, and franchise taxes in the amount of $0.2 million and $0.2 million have been recorded in other expenses on the accompanying Consolidated Statements of Operations for the three months ended March 31, 2018 and 2017, respectively.

Uncertain Tax Positions

As of March 31, 2018 and December 31, 2017, there were no liabilities for uncertain tax positions.

Concentrations of Credit Risk

Management believes the current credit risk portfolio is reasonably well diversified and does not contain any unusual concentration of credit risk.

11

3. Rental Property

The following table summarizes the components of rental property as of March 31, 2018 and December 31, 2017.

Rental Property (in thousands)	March 31, 2018		December 31, 2017
Land	$	324,734	$	321,560
Buildings, net of accumulated depreciation of $171,058 and $160,281, respectively	1,784,897		1,756,579
Tenant improvements, net of accumulated depreciation of $33,669 and $32,714, respectively	29,648		30,138
Building and land improvements, net of accumulated depreciation of $61,431 and $56,062, respectively	141,936		143,170
Construction in progress	1,951		2,877
Deferred leasing intangibles, net of accumulated amortization of $215,597 and $280,642, respectively	305,188		313,253
Total rental property, net	$	2,588,354	$	2,567,577

Acquisitions

The following table summarizes the acquisitions of the Company during the three months ended March 31, 2018.

Location	Square Feet	Buildings	Purchase Price (in thousands)
Fountain Inn, SC	203,000	1	$	10,755
Bloomington, MN	145,351	1	13,538
York, PA	278,582	1	18,277
Houston, TX	242,225	2	22,478
Greer, SC	222,710	1	13,773
Three months ended March 31, 2018	1,091,868	6	$	78,821

The following table summarizes the allocation of the consideration paid at the date of acquisition during the three months ended March 31, 2018 for the acquired assets and liabilities in connection with the acquisitions identified in the table above.

Acquired Assets and Liabilities	Purchase Price (in thousands)			Weighted Average Amortization Period (years) of Intangibles at Acquisition
Land	$	6,415		N/A
Buildings	57,248			N/A
Tenant improvements	996			N/A
Building and land improvements	2,418			N/A
Deferred leasing intangibles - In-place leases	8,122			6.3
Deferred leasing intangibles - Tenant relationships	3,712			10.5
Deferred leasing intangibles - Above market leases	583			5.8
Deferred leasing intangibles - Below market leases	(673		)	9.7
Total purchase price	$	78,821

The table below sets forth the results of operations for the three months ended March 31, 2018 for the buildings acquired during the three months ended March 31, 2018 included in the Company’s Consolidated Statements of Operations from the date of acquisition.

Results of Operations (in thousands)	Three months ended March 31, 2018
Total revenue	$	924
Net loss	$	104

Dispositions

During the three months ended March 31, 2018, the Company sold two buildings comprised of approximately 0.7 million square feet with a net book value of approximately $26.9 million to third parties. These buildings contributed approximately $0.3 million and $0.9 million to revenue for the three months ended March 31, 2018 and 2017, respectively. These buildings contributed approximately $49,000 and $46,000 to net income (exclusive of loss on involuntary conversion and gain on the sales of rental property, net) for the three months ended March 31, 2018 and 2017, respectively. Net proceeds from the sales of rental property were approximately $49.6 million and the Company recognized the full gain on the sales of rental property, net of approximately $22.7 million for the three months ended March 31, 2018.

12

Assets Held for Sale

As of March 31, 2018, the related land, building and improvements, net, and deferred leasing intangibles, net, of approximately $2.0 million, $10.7 million, and $0.8 million, respectively, for two buildings were classified as assets held for sale, net on the accompanying Consolidated Balance Sheets. These buildings contributed approximately $0.2 million and $0.5 million to revenue for the three months ended March 31, 2018 and 2017, respectively. These buildings contributed a net loss of approximately $0.8 million and $29,000 to net income for the three months ended March 31, 2018 and 2017, respectively.

Loss on Impairments

The following table summarizes the Company's loss on impairments for assets held and used during the three months ended March 31, 2018.

Property Location	Buildings	Event or Change in Circumstance Leading to Impairment Evaluation(1)		Valuation technique utilized to estimate fair value	Fair Value(2)		Loss on Impairments
					(in thousands)
Buena Vista, VA	1	Change in estimated hold period	(3)	Discounted cash flows
Sergeant Bluff, IA	1	Change in estimated hold period	(3)	Discounted cash flows
Three months ended March 31, 2018					$	3,176	$	2,934

(1) The Company tested the asset group for impairment utilizing a probability weighted recovery analysis of certain scenarios, and it was determined that the carrying value of the property and intangibles were not recoverable from the estimated future undiscounted cash flows.

(2) The estimated fair value of the property is based on Level 3 inputs and is a non-recurring fair value measurement. Level 3 is defined as unobservable inputs in which little or no market data exists, therefore requiring an entity to develop its own assumptions.

(3) Level 3 inputs used to determine fair value for the properties impaired for the three months ended March 31, 2018: discount rates ranged from 11.0% to 14.5% and exit capitalization rates ranged from 11.0% to 13.0%.

Deferred Leasing Intangibles

The following table sets forth the deferred leasing intangibles on the accompanying Consolidated Balance Sheets as of March 31, 2018 and December 31, 2017.

	March 31, 2018							December 31, 2017
Deferred Leasing Intangibles (in thousands)	Gross		Accumulated Amortization			Net		Gross		Accumulated Amortization			Net
Above market leases	$	70,675	$	(30,725	)	$	39,950	$	78,558	$	(36,810	)	$	41,748
Other intangible lease assets	450,110		(184,872		)	265,238		515,337		(243,832		)	271,505
Total deferred leasing intangible assets	$	520,785	$	(215,597	)	$	305,188	$	593,895	$	(280,642	)	$	313,253
Below market leases	$	32,041	$	(11,321	)	$	20,720	$	34,776	$	(13,555	)	$	21,221
Total deferred leasing intangible liabilities	$	32,041	$	(11,321	)	$	20,720	$	34,776	$	(13,555	)	$	21,221

The following table sets forth the amortization expense and the net decrease to rental income for the amortization of deferred leasing intangibles during the three months ended March 31, 2018 and 2017.

	Three months ended March 31,
Deferred Leasing Intangibles Amortization (in thousands)	2018		2017
Net decrease to rental income related to above and below market lease amortization	$	1,207	$	1,296
Amortization expense related to other intangible lease assets	$	18,100	$	18,393

The following table sets forth the amortization of deferred leasing intangibles over the next five calendar years beginning with 2018 as of March 31, 2018.

Year	Amortization Expense Related to Other Intangible Lease Assets (in thousands)		Net Decrease to Rental Income Related to Above and Below Market Lease Amortization (in thousands)
Remainder of 2018	$	48,805	$	2,987
2019	$	50,905	$	3,846
2020	$	40,954	$	3,504
2021	$	30,242	$	2,178
2022	$	23,113	$	1,210

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4. Debt

The following table sets forth a summary of the Company’s outstanding indebtedness, including borrowings under the Company’s unsecured credit facility, unsecured term loans, unsecured notes, and mortgage notes as of March 31, 2018 and December 31, 2017.

Loan	Principal Outstanding as of March 31, 2018 (in thousands)			Principal Outstanding as of December 31, 2017 (in thousands)			Interest  Rate (1)		Maturity Date	Prepayment Terms (2)
Unsecured credit facility:
Unsecured Credit Facility (3)	$	218,000		$	271,000		L + 1.15%		Dec-18-2019	i
Total unsecured credit facility	218,000			271,000
Unsecured term loans:
Unsecured Term Loan C	150,000			150,000			L + 1.30%		Sep-29-2020	i
Unsecured Term Loan B	150,000			150,000			L + 1.30%		Mar-21-2021	i
Unsecured Term Loan A	150,000			150,000			L + 1.30%		Mar-31-2022	i
Unsecured Term Loan D (4)	75,000			—			L + 1.30%		Jan-04-2023	i
Total unsecured term loans	525,000			450,000
Less: Total unamortized deferred financing fees and debt issuance costs	(3,494		)	(3,735		)
Total carrying value unsecured term loans, net	521,506			446,265
Unsecured notes:
Series F Unsecured Notes	100,000			100,000			3.98	%	Jan-05-2023	ii
Series A Unsecured Notes	50,000			50,000			4.98	%	Oct-1-2024	ii
Series D Unsecured Notes	100,000			100,000			4.32	%	Feb-20-2025	ii
Series B Unsecured Notes	50,000			50,000			4.98	%	Jul-1-2026	ii
Series C Unsecured Notes	80,000			80,000			4.42	%	Dec-30-2026	ii
Series E Unsecured Notes	20,000			20,000			4.42	%	Feb-20-2027	ii
Total unsecured notes	400,000			400,000
Less: Total unamortized deferred financing fees and debt issuance costs	(1,774		)	(1,766		)
Total carrying value unsecured notes, net	398,226			398,234
Mortgage notes (secured debt):
Wells Fargo Bank, National Association CMBS Loan	54,515			54,949			4.31	%	Dec-1-2022	iii
Thrivent Financial for Lutherans	3,879			3,906			4.78	%	Dec-15-2023	iv
Total mortgage notes	58,394			58,855
Total unamortized fair market value premiums	58			61
Less: Total unamortized deferred financing fees and debt issuance costs	(601		)	(634		)
Total carrying value mortgage notes, net	57,851			58,282
Total / weighted average interest rate (5)	$	1,195,583		$	1,173,781		3.56	%

(1) Interest rate as of March 31, 2018. At March 31, 2018, the one-month LIBOR (“L”) was 1.88313%. The interest rate is not adjusted to include the amortization of deferred financing fees or debt issuance costs incurred in obtaining debt or any unamortized fair market value premiums. The spread over the applicable rate for the Company's unsecured credit facility and unsecured term loans is based on the Company's consolidated leverage ratio, as defined in the respective loan agreements.

(2) Prepayment terms consist of (i) pre-payable with no penalty; (ii) pre-payable with penalty; (iii) pre-payable without penalty three months prior to the maturity date, however can be defeased beginning January 1, 2016; and (iv) pre-payable without penalty three months prior to the maturity date.

(3) The capacity of the unsecured credit facility is $450.0 million. Deferred financing fees and debt issuance costs, net of accumulated amortization related to the unsecured credit facility of approximately $1.3 million and $1.5 million is included in prepaid expenses and other assets on the accompanying Consolidated Balance Sheets as of March 31, 2018 and December 31, 2017, respectively.

(4) The remaining capacity is $75.0 million, which the Company has until July 27, 2018 to draw.

(5) The weighted average interest rate was calculated using the fixed interest rate swapped on the notional amount of $600.0 million of debt that was in effect as of March 31, 2018, and is not adjusted to include the amortization of deferred financing fees or debt issuance costs incurred in obtaining debt or any unamortized fair market value premiums.

The aggregate undrawn nominal commitment on the unsecured credit facility and unsecured term loans as of March 31, 2018 was approximately $301.1 million, including issued letters of credit. The Company's actual borrowing capacity at any given point in time may be less and is restricted to a maximum amount based on the Company's debt covenant compliance. Total accrued interest for the Company's indebtedness was approximately $5.4 million and $5.6 million as of March 31, 2018 and December 31, 2017, respectively, and is included in accounts payable, accrued expenses and other liabilities on the accompanying Consolidated Balance Sheets.

14

The table below sets forth the costs included in interest expense related to the Company's debt arrangements on the accompanying Consolidated Statement of Operations for the three months ended March 31, 2018 and 2017.

	Three months ended March 31,
Costs Included in Interest Expense (in thousands)	2018		2017
Amortization of deferred financing fees and debt issuance costs and fair market value premiums	$	534	$	501
Facility fees and unused fees	$	339	$	275

On March 28, 2018, the Company drew $75.0 million of the $150.0 million unsecured term loan that was entered into on July 28, 2017.

Financial Covenant Considerations

The Company was in compliance with all financial and other covenants as of March 31, 2018 and December 31, 2017 related to its unsecured credit facility, unsecured term loans, unsecured notes, and mortgage notes. The real estate net book value of the properties that are collateral for the Company’s debt arrangements was approximately $89.8 million and $90.9 million at March 31, 2018 and December 31, 2017, respectively, and is limited to senior, property-level secured debt financing arrangements.

Fair Value of Debt

The following table presents the aggregate principal outstanding under the Company’s debt arrangements and the corresponding estimate of fair value as of March 31, 2018 and December 31, 2017 (in thousands).

	March 31, 2018					December 31, 2017
	Principal Outstanding			Fair Value		Principal Outstanding			Fair Value
Unsecured credit facility	$	218,000		$	218,371	$	271,000		$	271,528
Unsecured term loans	525,000			526,685		450,000			451,463
Unsecured notes	400,000			410,058		400,000			415,599
Mortgage notes	58,394			58,611		58,855			59,769
Total principal amount	1,201,394			$	1,213,725	1,179,855			$	1,198,359
Add: Total unamortized fair market value premiums	58					61
Less: Total unamortized deferred financing fees and debt issuance costs	(5,869		)			(6,135		)
Total carrying value	$	1,195,583				$	1,173,781

The applicable fair value guidance establishes a three tier value hierarchy, which prioritizes the inputs used in measuring fair value. These tiers include: Level 1, defined as observable inputs such as quoted prices in active markets; Level 2, defined as inputs other than quoted prices in active markets that are either directly or indirectly observable; and Level 3, defined as unobservable inputs in which little or no market data exists, therefore requiring an entity to develop its own assumptions. The fair value of the Company’s debt is based on Level 3 inputs.

5. Use of Derivative Financial Instruments

Risk Management Objective of Using Derivatives

The Company’s use of derivative instruments is limited to the utilization of interest rate swaps to manage interest rate risk exposure on existing and future liabilities and not for speculative purposes. The principal objective of such arrangements is to minimize the risks and related costs associated with the Company’s operating and financial structure.

15

The following table details the Company’s outstanding interest rate swaps as of March 31, 2018. All of the Company's interest rate swaps are designated as qualifying cash flow hedges.

Interest Rate Derivative Counterparty	Trade Date	Effective Date	Notional Amount (in thousands)		Fair Value (in thousands)		Pay Fixed Interest Rate		Receive Variable Interest Rate	Maturity Date
Regions Bank	Mar-01-2013	Mar-01-2013	$	25,000	$	461	1.3300	%	One-month L	Feb-14-2020
Capital One, N.A.	Jun-13-2013	Jul-01-2013	$	50,000	$	595	1.6810	%	One-month L	Feb-14-2020
Capital One, N.A.	Jun-13-2013	Aug-01-2013	$	25,000	$	287	1.7030	%	One-month L	Feb-14-2020
Regions Bank	Sep-30-2013	Feb-03-2014	$	25,000	$	153	1.9925	%	One-month L	Feb-14-2020
The Toronto-Dominion Bank	Oct-14-2015	Sep-29-2016	$	25,000	$	622	1.3830	%	One-month L	Sep-29-2020
PNC Bank, N.A.	Oct-14-2015	Sep-29-2016	$	50,000	$	1,237	1.3906	%	One-month L	Sep-29-2020
Regions Bank	Oct-14-2015	Sep-29-2016	$	35,000	$	870	1.3858	%	One-month L	Sep-29-2020
U.S. Bank, N.A.	Oct-14-2015	Sep-29-2016	$	25,000	$	618	1.3950	%	One-month L	Sep-29-2020
Capital One, N.A.	Oct-14-2015	Sep-29-2016	$	15,000	$	370	1.3950	%	One-month L	Sep-29-2020
Royal Bank of Canada	Jan-08-2015	Mar-20-2015	$	25,000	$	529	1.7090	%	One-month L	Mar-21-2021
The Toronto-Dominion Bank	Jan-08-2015	Mar-20-2015	$	25,000	$	526	1.7105	%	One-month L	Mar-21-2021
The Toronto-Dominion Bank	Jan-08-2015	Sep-10-2017	$	100,000	$	615	2.2255	%	One-month L	Mar-21-2021
Wells Fargo, N.A.	Jan-08-2015	Mar-20-2015	$	25,000	$	646	1.8280	%	One-month L	Mar-31-2022
The Toronto-Dominion Bank	Jan-08-2015	Feb-14-2020	$	25,000	$	105	2.4535	%	One-month L	Mar-31-2022
Regions Bank	Jan-08-2015	Feb-14-2020	$	50,000	$	188	2.4750	%	One-month L	Mar-31-2022
Capital One, N.A.	Jan-08-2015	Feb-14-2020	$	50,000	$	135	2.5300	%	One-month L	Mar-31-2022
The Toronto-Dominion Bank	Jul-20-2017	Oct-30-2017	$	25,000	$	768	1.8485	%	One-month L	Jan-04-2023
Royal Bank of Canada	Jul-20-2017	Oct-30-2017	$	25,000	$	770	1.8505	%	One-month L	Jan-04-2023
Wells Fargo, N.A.	Jul-20-2017	Oct-30-2017	$	25,000	$	770	1.8505	%	One-month L	Jan-04-2023
PNC Bank, N.A.	Jul-20-2017	Oct-30-2017	$	25,000	$	770	1.8485	%	One-month L	Jan-04-2023
PNC Bank, N.A.	Jul-20-2017	Oct-30-2017	$	50,000	$	1,542	1.8475	%	One-month L	Jan-04-2023

The fair value of the interest rate swaps outstanding as of March 31, 2018 and December 31, 2017 was as follows.

Balance Sheet Line Item (in thousands)	Notional Amount March 31, 2018		Fair Value March 31, 2018		Notional Amount December 31, 2017		Fair Value December 31, 2017
Interest rate swaps-Asset	$	725,000	$	12,577	$	475,000	$	6,079
Interest rate swaps-Liability	$	—	$	—	$	250,000	$	(1,217	)

Cash Flow Hedges of Interest Rate Risk

The Company’s objectives in using interest rate swaps are to add stability to interest expense and to manage its exposure to interest rate movements. 

For derivatives designated and that qualify as cash flow hedges of interest rate risk, the gain or loss on the derivative is recorded in accumulated other comprehensive income and subsequently reclassified into interest expense in the same periods during which the hedged transaction affects earnings.

Amounts reported in accumulated other comprehensive income related to derivatives designated as qualifying cash flow hedges will be reclassified to interest expense as interest payments are made on the Company's variable rate debt. The Company estimates that approximately $2.3 million will be reclassified from accumulated other comprehensive income as a decrease to interest expense over the next 12 months.

The table below presents the effect of cash flow hedge accounting and the location in the consolidated financial statements for the three months ended March 31, 2018 and 2017 (in thousands).

	Three months ended March 31,
	2018		2017
Income recognized in accumulated other comprehensive income on interest rate swaps	$	7,493	$	514
Loss reclassified from accumulated other comprehensive income into income (loss) as interest expense	$	230	$	698
Total interest expense presented in the Consolidated Statements of Operations in which the effects of cash flow hedges are recorded	$	11,386	$	10,472

16

Credit-risk-related Contingent Features

The Company has agreements with each of its derivative counterparties that contain a provision where the Company could be declared in default on its derivative obligations if repayment of the underlying indebtedness is accelerated by the lender due to the Company's default on the indebtedness.

As of March 31, 2018, the Company had no derivatives that were in a net liability position by counterparty.

Fair Value of Interest Rate Swaps

The Company’s valuation of the interest rate swaps is determined using widely accepted valuation techniques including discounted cash flow analysis on the expected cash flows of each derivative. This analysis reflects the contractual terms of the derivatives, including the period to maturity, and uses observable market-based inputs including interest rate curves.

The Company incorporates credit valuation adjustments to appropriately reflect both its own nonperformance risk and the respective counterparty’s nonperformance risk in the fair value measurements. In adjusting the fair value of its derivative contracts for the effect of nonperformance risk, the Company has considered the impact of netting and any applicable credit enhancements, such as collateral postings, thresholds, mutual puts, and guarantees.

Although the Company has determined that the majority of the inputs used to value its derivatives fall within Level 2 of the fair value hierarchy, the credit valuation adjustments associated with its derivatives utilize Level 3 inputs, such as estimates of current credit spreads to evaluate the likelihood of default by itself and its counterparties. However, as of March 31, 2018 and December 31, 2017, the Company has assessed the significance of the impact of the credit valuation adjustments on the overall valuation of its derivative positions and has determined that the credit valuation adjustments are not significant to the overall valuation of its derivatives. As a result, the Company has determined that its derivative valuations in their entirety are classified in Level 2 of the fair value hierarchy.

The following sets forth the Company’s financial instruments that are accounted for at fair value on a recurring basis as of March 31, 2018 and December 31, 2017. 

			Fair Value Measurements as of March 31, 2018 Using
Balance Sheet Line Item (in thousands)	Fair Value March 31, 2018		Level 1		Level 2		Level 3
Interest rate swaps-Asset	$	12,577	$	—	$	12,577	$	—
Interest rate swaps-Liability	$	—	$	—	$	—	$	—

				Fair Value Measurements as of December 31, 2017 Using
Balance Sheet Line Item (in thousands)	Fair Value December 31, 2017			Level 1		Level 2			Level 3
Interest rate swaps-Asset	$	6,079		$	—	$	6,079		$	—
Interest rate swaps-Liability	$	(1,217	)	$	—	$	(1,217	)	$	—

6. Equity

Preferred Stock

The table below sets forth the Company’s outstanding preferred stock issuances as of March 31, 2018.

Preferred Stock Issuances	Issuance Date	Number of Shares	Liquidation Value Per Share		Interest Rate
6.625% Series B Cumulative Redeemable Preferred Stock (“Series B Preferred Stock”)	April 16, 2013	2,800,000	$	25.00	6.625	%
6.875% Series C Cumulative Redeemable Preferred Stock (“Series C Preferred Stock”)	March 17, 2016	3,000,000	$	25.00	6.875	%

17

The tables below set forth the dividends attributable to the Company's outstanding preferred stock issuances during the three months ended March 31, 2018 and the year ended December 31, 2017.

Quarter Ended 2018	Declaration Date	Series B Preferred Stock Per Share		Series C Preferred Stock Per Share		Payment Date
March 31	February 14, 2018	0.4140625		0.4296875		April 2, 2018
Total		$	0.4140625	$	0.4296875

Quarter Ended 2017	Declaration Date	Series B Preferred Stock Per Share		Series C Preferred Stock Per Share		Payment Date
December 31	November 2, 2017	$	0.4140625	$	0.4296875	December 29, 2017
September 30	July 31, 2017	0.4140625		0.4296875		September 29, 2017
June 30	May 1, 2017	0.4140625		0.4296875		June 30, 2017
March 31	February 15, 2017	0.4140625		0.4296875		March 31, 2017
Total		$	1.6562500	$	1.7187500

On April 10, 2018, the Company’s board of directors declared the Series B Preferred Stock and Series C Preferred Stock dividends for the quarter ending June 30, 2018 at a quarterly rate of $0.4140625 per share and $0.4296875 per share, respectively.

Common Stock

The following table sets forth the terms of the Company’s at-the market (“ATM”) common stock offering program as of March 31, 2018.

ATM Common Stock Offering Program	Date	Maximum Aggregate Offering Price (in thousands)		Aggregate Common Stock Available as of March 31, 2018 (in thousands)
2017 $500 million ATM	November 13, 2017	$	500,000	$	489,674

The table below set forth the activity under the ATM common stock offering programs during the year ended December 31, 2017 (in thousands, except share data). There was no activity under the ATM common stock offering programs during three months ended March 31, 2018.

	Year ended December 31, 2017
ATM Common Stock Offering Program	Shares Sold	Weighted Average Price Per Share		Gross Proceeds		Sales Agents’ Fee		Net Proceeds
2017 $500 million ATM	363,843	$	28.38	$	10,326	$	129	$	10,197
2017 $300 million ATM(1)	11,098,748	$	27.03	300,000		3,637		296,363
2016 $228 million ATM(1)	4,799,784	$	24.42	117,216		1,604		115,612
Total/weighted average	16,262,375	$	26.29	$	427,542	$	5,370	$	422,172

(1) These programs ended before December 31, 2017.

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Dividends

The table below sets forth the dividends attributable to the Company's outstanding shares of common stock that were declared during the three months ended March 31, 2018 and the year ended December 31, 2017.

Month Ended 2018	Declaration Date	Record Date	Per Share		Payment Date
March 31	November 2, 2017	March 29, 2018	0.118333		April 16, 2018
February 28	November 2, 2017	February 28, 2018	0.118333		March 15, 2018
January 31	November 2, 2017	January 31, 2018	0.118333		February 15, 2018
Total			$	0.354999

Month Ended 2017	Declaration Date	Record Date	Per Share		Payment Date
December 31	July 31, 2017	December 29, 2017	$	0.117500	January 16, 2018
November 30	July 31, 2017	November 30, 2017	0.117500		December 15, 2017
October 31	July 31, 2017	October 31, 2017	0.117500		November 15, 2017
September 30	May 1, 2017	September 29, 2017	0.117500		October 16, 2017
August 31	May 1, 2017	August 31, 2017	0.117500		September 15, 2017
July 31	May 1, 2017	July 31, 2017	0.117500		August 15, 2017
June 30	February 15, 2017	June 30, 2017	0.116667		July 17, 2017
May 31	February 15, 2017	May 31, 2017	0.116667		June 15, 2017
April 30	February 15, 2017	April 28, 2017	0.116667		May 15, 2017
March 31	November 2, 2016	March 31, 2017	0.116667		April 17, 2017
February 28	November 2, 2016	February 28, 2017	0.116667		March 15, 2017
January 31	November 2, 2016	January 31, 2017	0.116667		February 15, 2017
Total			$	1.405002

On April 10, 2018, the Company’s board of directors declared the common stock dividends for the months ending April 30, 2018, May 31, 2018 and June 30, 2018 at a monthly rate of $0.118333 per share of common stock.

Restricted Stock-Based Compensation

Restricted shares of common stock granted on January 5, 2018 to certain employees of the Company, subject to the recipient’s continued employment, will vest in four equal installments on January 1 of each year beginning in 2019. The following table summarizes activity related to the Company’s unvested restricted shares of common stock for the three months ended March 31, 2018 and the year ended December 31, 2017.

Unvested Restricted Shares of Common Stock	Shares
Balance at December 31, 2016	272,337
Granted	75,001		(1)
Vested	(109,209	)	(2)
Forfeited	(922	)
Balance at December 31, 2017	237,207
Granted	76,659		(1)
Vested	(112,405	)	(2)
Forfeited	(5,090	)
Balance at March 31, 2018	196,371

(1) The fair value per share on the grant date of January 5, 2018 and January 6, 2017 was $26.40 and $24.41, respectively.

(2) The Company repurchased and retired 41,975 and 40,836 restricted shares of common stock that vested during the three months ended March 31, 2018 and the year ended December 31, 2017, respectively.

The unrecognized compensation expense associated with the Company’s restricted shares of common stock at March 31, 2018 was approximately $4.1 million and is expected to be recognized over a weighted average period of approximately 2.9 years.

The following table summarizes the fair value at vesting for the restricted shares of common stock that vested during the three months ended March 31, 2018 and 2017. 

	Three months ended March 31,
	2018		2017
Vested restricted shares of common stock	112,405		109,209
Fair value of vested restricted shares of common stock (in thousands)	$	3,002	$	2,591

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7. Noncontrolling Interest

The table below summarizes the activity for noncontrolling interest in the Company for the three months ended March 31, 2018 and the year ended December 31, 2017.

	LTIP Units		Other Common Units		Total Noncontrolling Common Units		Noncontrolling Interest
Balance at December 31, 2016	1,576,516		2,057,365		3,633,881		4.3	%
Granted/Issued	126,239		687,827		814,066		N/A
Forfeited	—		—		—		N/A
Conversions from LTIP units to Other Common Units	(245,685	)	245,685		—		N/A
Redemptions from Other Common Units to common stock	—		(351,260	)	(351,260	)	N/A
Balance at December 31, 2017	1,457,070		2,639,617		4,096,687		4.1	%
Granted/Issued	324,802		—		324,802		N/A
Forfeited	—		—		—		N/A
Conversions from LTIP units to Other Common Units	(145,672	)	145,672		—		N/A
Redemptions from Other Common Units to common stock	—		(145,672	)	(145,672	)	N/A
Balance at March 31, 2018	1,636,200		2,639,617		4,275,817		4.2	%

LTIP Units

On March 12, 2018, the Company's board of directors appointed Michelle Dilley to serve as director of the Company and serve as a member of the nominating and corporate governance committee of the board of directors, effective on March 12, 2018. On March 12, 2018, Ms. Dilley was granted 3,930 LTIP units which, subject to Ms. Dilley's continued service, will vest on January 1, 2019.

LTIP units granted on January 5, 2018 to non-employee, independent directors, subject to the recipient’s continued service, will vest on January 1, 2019. LTIP units granted on January 5, 2018 to certain senior executive officers and senior employees, subject to the recipient’s continued employment, will vest quarterly over four years, with the first vesting date having been March 31, 2018. Refer to Note 8 for a discussion of vested LTIP units granted on January 5, 2018 pursuant to the 2015 Outperformance Program (the “2015 OPP”).

The fair value of the LTIP units at the date of grant was determined by a lattice-binomial option-pricing model based on a Monte Carlo simulation. The fair value of the LTIP units are based on Level 3 inputs and are non-recurring fair value measurements. The table below sets forth the assumptions used in valuing such LTIP units granted during the three months ended March 31, 2018 (excluding those vested LTIP units granted pursuant to the 2015 OPP; refer to Note 8 for details).

LTIP Units	Assumptions
Grant date	March 12, 2018			January 5, 2018
Expected term (years)	10			10
Expected volatility	22.0		%	22.0		%
Expected dividend yield	6.0		%	6.0		%
Risk-free interest rate	2.46		%	2.09		%
Fair value of LTIP units at issuance (in thousands)	$	90		$	3,447
LTIP units at issuance	3,930			137,616
Fair value unit price per LTIP unit at issuance	$	22.90		$	25.05

The following table summarizes activity related to the Company’s unvested LTIP units for the three months ended March 31, 2018 and the year ended December 31, 2017.

Unvested LTIP Units	LTIP Units
Balance at December 31, 2016	403,423
Granted	126,239
Vested	(229,355	)
Forfeited	—
Balance at December 31, 2017	300,307
Granted	324,802
Vested	(231,041	)
Forfeited	—
Balance at March 31, 2018	394,068

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The unrecognized compensation expense associated with the Company’s LTIP units at March 31, 2018 was approximately $7.5 million and is expected to be recognized over a weighted average period of approximately 2.8 years.

The following table summarizes the fair value at vesting for the LTIP units that vested during the three months ended March 31, 2018 and 2017.

	Three months ended March 31,
	2018		2017
Vested LTIP units	231,041		67,670
Fair value of vested LTIP units (in thousands)	$	6,035	$	1,664

8. Equity Incentive Plan

On January 5, 2018, the Company granted performance units approved by the compensation committee of the board of directors, under the 2011 Plan to certain key employees of the Company. The terms of the performance units granted on January 5, 2018 are substantially the same as the terms of the performance units granted on January 6, 2017 and March 8, 2016, except that the measuring period commences on January 1, 2018 and ends on December 31, 2020.

The fair value of the performance units at the date of grant was determined by a lattice-binomial option-pricing model based on a Monte Carlo simulation. The fair value of the performance units are based on Level 3 inputs and are non-recurring fair value measurements. The performance unit equity compensation expense is recognized into earnings ratably from the grant date over the respective vesting periods. The table below sets forth the assumptions used in valuing the performance units granted during the three months ended March 31, 2018.

Performance Units	Assumptions
Grant date	January 5, 2018
Expected volatility	22.0		%
Expected dividend yield	6.0		%
Risk-free interest rate	2.09		%
Fair value of performance units grant (in thousands)	$	5,456

On January 1, 2018, the Company’s three year measurement period pursuant to the 2015 OPP concluded. It was determined that the Company's total stockholder return exceeded the threshold percentage and return hurdle and a pool of approximately $6.2 million was awarded to the participants. The compensation committee of the board of directors approved the issuance of 183,256 vested LTIP units and 53,722 vested shares of common stock (of which 15,183 shares of common stock were repurchased and retired) to the participants, all of which were issued on January 5, 2018.

The unrecognized compensation expense associated with the Company's performance units at March 31, 2018 was approximately $7.8 million and is expected to be recognized over a weighted average period of approximately 2.7 years.

Non-cash Compensation Expense

The following table summarizes the amount recorded in general and administrative expenses in the accompanying Consolidated Statements of Operations for the amortization of restricted shares of common stock, LTIP units, performance units, the 2015 OPP (performance units and the 2015 OPP, collectively the “Performance-based Compensation Plans”), and the Company’s director compensation for the three months ended March 31, 2018 and 2017.

	Three months ended March 31,
Non-Cash Compensation Expense (in thousands)	2018		2017
Restricted shares of common stock	$	434	$	592
LTIP units	871		1,170
Performance-based Compensation Plans	829		537
Director compensation (1)	86		88
Total non-cash compensation expense	$	2,220	$	2,387

(1) All of the Company’s independent directors elected to receive shares of common stock in lieu of cash for their service during the three months ended March 31, 2018 and 2017. The number of shares of common stock granted is calculated based on the trailing 10 days average common stock price ending on the third business day preceding the grant date.

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9. Earnings Per Share

During the three months ended March 31, 2018 and 2017, there were 201,650 and 239,827, respectively, of unvested restricted shares of common stock on a weighted average basis that were considered participating securities.

The following table sets forth the computation of basic and diluted earnings per common share for the three months ended March 31, 2018 and 2017.

	Three months ended March 31,
Earnings Per Share (in thousands, except per share data)	2018		2017
Numerator
Net income	$	25,149	$	69
Less: preferred stock dividends	2,448		2,448
Less: amount allocated to participating securities	71		83
Less: income (loss) attributable to noncontrolling interest after preferred stock dividends	954		(103		)
Net income (loss) attributable to common stockholders	$	21,676	$	(2,359	)
Denominator
Weighted average common shares outstanding — basic	97,021		81,808
Effect of dilutive securities(1)
Share-based compensation	302		—
Weighted average common shares outstanding — diluted	97,323		81,808
Net income (loss) per share — basic and diluted
Net income (loss) per share attributable to common stockholders — basic	$	0.22	$	(0.03	)
Net income (loss) per share attributable to common stockholders — diluted	$	0.22	$	(0.03	)

(1) During the three months ended March 31, 2018 and 2017, there were approximately 202 and 240, respectively, unvested restricted shares of common stock, respectively, on a weighted average basis that were not included in the computation of diluted earnings per share because to do so would have been antidilutive for the period. During the three months ended March 31, 2017, there were approximately 438 unvested shares under the Performance-based Compensation Plans on a weighted average basis that were not included in the computation of diluted earnings per share because to do so would have been antidilutive for the period.

10. Commitments and Contingencies

The Company is subject to various legal proceedings and claims that arise in the ordinary course of business. These matters are generally covered by insurance subject to deductible requirements. Management believes that the ultimate settlement of these actions will not have a material adverse effect on the Company’s financial position, results of operations, or cash flows.

The Company has letters of credit of approximately $5.9 million as of March 31, 2018 related to construction projects and certain other agreements.

11. Subsequent Events

The following non-recognized subsequent events were noted.

On April 10, 2018, the Company entered into a note purchase agreement for the future private placement by the Operating Partnership of $75.0 million senior unsecured notes maturing June 13, 2025 with a fixed annual interest rate of 4.10%, and $100.0 million senior unsecured notes maturing June 13, 2028 with a fixed annual interest rate of 4.27%.

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Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations

You should read the following discussion with the financial statements and related notes included elsewhere in Item 1 of this report and the audited financial statements and related notes thereto included in our most recent Annual Report on Form 10-K.

As used herein, except where the context otherwise requires, “Company,” “we,” “our” and “us,” refer to STAG Industrial, Inc. and our consolidated subsidiaries and partnerships, including our operating partnership,STAG Industrial Operating Partnership, L.P. (“Operating Partnership”). 

Forward-Looking Statements

This report contains “forward-looking statements” within the meaning of the safe harbor from civil liability provided for such statements by the Private Securities Litigation Reform Act of 1995 (set forth in Section 27A of the Securities Act of 1933, as amended (the “Securities Act”), and Section 21E of the Securities Exchange Act of 1934, as amended (the “Exchange Act”)). You can identify forward-looking statements by the use of words such as “anticipates,” “believes,” “estimates,” “expects,” “intends,” “may,” “plans,” “projects,” “seeks,” “should,” “will,” and variations of such words or similar expressions. Forward-looking statements in this report include, among others, statements about our future financial condition, results of operations, capitalization rates on future acquisitions, our business strategy and objectives, including our acquisition strategy, occupancy and leasing rates and trends, and expected liquidity needs and sources (including capital expenditures and the ability to obtain financing or raise capital). Our forward-looking statements reflect our current views about our plans, intentions, expectations, strategies and prospects, which are based on the information currently available to us and on assumptions we have made. Although we believe that our plans, intentions, expectations, strategies and prospects as reflected in or suggested by our forward-looking statements are reasonable, we can give no assurance that our plans, intentions, expectations, strategies or prospects will be attained or achieved and you should not place undue reliance on these forward‑looking statements. Furthermore, actual results may differ materially from those described in the forward‑looking statements and may be affected by a variety of risks and factors including, without limitation:

• the factors included in our Annual Report on Form 10-K for the year ended December 31, 2017, as updated elsewhere in this report, including those set forth under the headings “Business,” “Risk Factors,” and “Management’s Discussion and Analysis of Financial Condition and Results of Operations;”

• our ability to raise equity capital on attractive terms;

• the competitive environment in which we operate;

• real estate risks, including fluctuations in real estate values and the general economic climate in local markets and competition for tenants in such markets;

• decreased rental rates or increased vacancy rates;

• potential defaults (including bankruptcies or insolvency) on or non-renewal of leases by tenants;

• acquisition risks, including our ability to identify and complete accretive acquisitions and/or failure of such acquisitions to perform in accordance with projections;

• the timing of acquisitions and dispositions;

• potential natural disasters and other potentially catastrophic events such as acts of war and/or terrorism;

• international, national, regional and local economic conditions;

• the general level of interest rates and currencies;

• potential changes in the law or governmental regulations and interpretations of those laws and regulations, including changes in real estate and zoning laws or real estate investment trust (“REIT”) or corporate income tax laws, and potential increases in real property tax rates; 

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• financing risks, including the risks that our cash flows from operations may be insufficient to meet required payments of principal and interest and we may be unable to refinance our existing debt upon maturity or obtain new financing on attractive terms or at all; 

• credit risk in the event of non-performance by the counterparties to the interest rate swaps and revolving and unfunded debt;

• lack of or insufficient amounts of insurance;

• our ability to maintain our qualification as a REIT;

• our ability to retain key personnel; 

• litigation, including costs associated with prosecuting or defending claims and any adverse outcomes; and

• possible environmental liabilities, including costs, fines or penalties that may be incurred due to necessary remediation of contamination of properties presently owned or previously owned by us.

Any forward-looking statement speaks only as of the date on which it is made. New risks and uncertainties arise over time, and it is not possible for us to predict those events or how they may affect us. Except as required by law, we are not obligated to, and do not intend to, update or revise any forward-looking statements, whether as a result of new information, future events or otherwise.

Overview

We are a REIT focused on the acquisition and operation of single-tenant, industrial properties throughout the United States. We are a Maryland corporation and our common stock is publicly traded on the New York Stock Exchange under the symbol “STAG.”

We are organized and conduct our operations to qualify as a REIT under Sections 856 through 860 of the Internal Revenue Code of 1986, as amended, and generally are not subject to federal income tax to the extent we currently distribute our income to our stockholders and maintain our qualification as a REIT. We remain subject to state and local taxes on our income and property and to U.S. federal income and excise taxes on our undistributed income.

Factors That May Influence Future Results of Operations

Our ability to increase revenues or cash flow will depend in part on our (i) external growth, specifically acquisition activity, and (ii) internal growth, specifically occupancy and rental rates on our portfolio. A variety of other factors, including those noted below, also affect our future results of operations.

As used herein “total annualized base rental revenue” refers to the contractual monthly base rent as of March 31, 2018 (which differs from rent calculated in accordance with generally accepted accounting principles in the United States of America (“GAAP”)) multiplied by 12. If a tenant is in a free rent period as of March 31, 2018, the annualized rent is calculated based on the first contractual monthly base rent amount multiplied by 12.

Outlook

The outlook for our business remains positive, albeit on a moderated basis in light of over eight years of economic growth, some uncertainty regarding the current U.S. presidential administration and its policy initiatives, and continued asset appreciation. In March 2018, the federal funds target rate was raised 25 basis points to a target range of 1.50% to 1.75%. This announcement combined with the unwinding of its balance sheet by selling Treasury securities and anticipation of at least two more rate increases in 2018 are signs of the Central Bank’s confidence in the economy. The current trajectory of the federal funds target rate aligns with the Central Bank’s consistent commentary that future rate increases would be gradual and rates will likely remain historically low for an extended period of time. If interest rates rise further as a result of Federal Reserve policy action (short-term interest rates) or changes in market expectations and capital flows (long-term interest rates), we believe strengthening economic conditions are likely to accompany these changes. This strengthening of economic conditions combined with the currently favorable industrial supply demand environment should translate to a net positive result for our business. Specifically, our existing portfolio should benefit from rising rental rates and our acquisition activity should benefit from higher yields. Furthermore, we believe certain characteristics of our business should position us well in a rising interest rate environment, including the fact that we have minimal

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floating rate debt exposure (taking into account our hedging activities) and that many of our competitors for the assets we purchase tend to be smaller local and regional investors who are likely to be more heavily impacted by interest rate increases.

Several industrial specific trends contribute to the expected strong demand, including:

• the rise of e-commerce (as compared to the traditional retail store distribution model) and the concomitant demand by e-commerce industry participants for well-located, functional distribution space;

• the increasing attractiveness of the U.S. as a manufacturing and distribution location because of the size of the U.S. consumer market, an increase in overseas labor costs and the overall cost of supplying and shipping goods (i.e. the shortening and fattening of the supply chain); and

• the overall quality of the transportation infrastructure in the U.S.

Furthermore, the lack of material speculative development and the broader failure of supply to keep pace with demand in many of our markets has improved and may continue to modestly improve occupancy levels and rental rates in our portfolio. We believe, however, that industrial supply, more so than other real estate property types, has historically had a short lead time and can appear quickly. We have started to see a notable pick-up in development activity in a growing number of the primary industrial markets. On the demand side, we note that the quality and availability of labor remains a key focus of tenants making occupancy decisions. We will continue to monitor the supply and demand fundamentals for industrial real estate and assess its impact on our business.

Conditions in Our Markets

The buildings in our portfolio are located in markets throughout the United States. Positive or negative changes in economic or other conditions, new supply, adverse weather conditions and natural disasters, and other factors in these markets may affect our overall performance.

Rental Income

We receive income primarily in the form of rental income from the tenants who occupy our buildings. The amount of rental income generated by the buildings in our portfolio depends principally on occupancy and rental rates. As of March 31, 2018, our Operating Portfolio was approximately 95.6% leased and our straight-line (“SL”) rent change (as defined below) on new and renewal leases together grew approximately 16.8% during the three months ended March 31, 2018. We define the Operating Portfolio as all warehouse and light manufacturing assets that were acquired stabilized or have achieved Stabilization. The Operating Portfolio excludes non-core flex/office assets and assets contained in the Value Add Portfolio.We define Stabilization for assets under redevelopment to occur upon the earlier of achieving 90% occupancy or twelve months after completion. Stabilization for assets that were acquired and immediately added to the Value Add Portfolio occurs under the following: (i) if acquired with less than 75% occupancy as of the acquisition date, Stabilization will occur upon the earlier of achieving 90% occupancy or twelve months from the acquisition date; or (ii) if acquired and will be less than 75% occupied due to known move-outs within two years of the acquisition date, Stabilization will occur upon the earlier of achieving 90% occupancy after the known move-outs have occurred or twelve months after the known move-outs have occurred.We define the Value Add Portfolio as properties that meet any of the following criteria: (i) less than 75% occupied as of the acquisition date; (ii) will be less than 75% occupied due to known move-outs within two years of the acquisition date; or (iii) out of service with significant physical renovation of the asset.

Future economic downturns or regional downturns affecting our submarkets that impair our ability to renew or re-lease space and the ability of our tenants to fulfill their lease commitments, as in the case of tenant bankruptcies, could adversely affect our ability to maintain or increase rental rates at our buildings. Our ability to lease our properties and the attendant rental rate is dependent upon, among other things, (i) the overall economy, (ii) the supply/demand dynamic in our markets, (iii) the quality of our properties, including age, clear height, and configuration, and (iv) our tenants’ ability to meet their contractual obligations to us.

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The following table provides a summary of our Operating Portfolio leases executed during the three months ended March 31, 2018. Certain leases contain rental concessions; any such rental concessions are accounted for on a straight-line basis over the term of the lease.

Operating Portfolio	Square Feet	Cash Basis Rent Per Square Foot		SL Rent Per Square Foot		Total Turnover Costs Per Square Foot(1)		Cash Rent Change(2)		SL Rent Change(3)		Weighted Average Lease Term(4) (years)	Rental Concessions per Square Foot(5)
Three months ended March 31, 2018
New Leases(6)	909,072	$	3.13	$	3.28	$	2.29	27.1	%	37.7	%	7.6	$	0.97
Renewal Leases(7)	2,402,535	3.81		3.96		0.48		4.6	%	12.1	%	5.3	—
Total/weighted average	3,311,607	$	3.62	$	3.77	$	0.98	8.7	%	16.8	%	5.9	$	0.27

(1) We define Turnover Costs as the costs for improvements of vacant and renewal spaces, as well as the commissions for leasing transactions. Turnover Costs per square foot represent the total turnover costs expected to be incurred on the leases signed during the period and do not reflect actual expenditures for the period.

(2) Wedefine Cash Rent Change as the percentage change in the base rent of the lease executed during the period compared to the base rent of the Comparable Lease for assets included in the Operating Portfolio. The calculation compares the first base rent payment due after the lease commencement date compared to the base rent of the last monthly payment due prior to the termination of the lease, excluding holdover rent. Rent under gross or similar type leases are converted to a net rent based on an estimate of the applicable recoverable expenses.We define a Comparable Lease as a lease in the same space with a similar lease structure as compared to the previous in-place lease, excluding new leases for space that was not occupied under our ownership.

(3) We define SL Rent Change as the percentage change in the average monthly base rent over the term of the lease, calculated on a straight-line basis, of the lease executed during the period compared to the Comparable Lease for assets included in the Operating Portfolio. Rent under gross or similar type leases are converted to a net rent based on an estimate of the applicable recoverable expenses, and this calculation excludes the impact of any holdover rent.

(4) We define Weighted Average Lease Term as the contractual lease term in years as of the lease start date weighted by square footage.

(5) Represents the total rental concessions for the entire lease term.

(6) We define a New Lease as any lease that is signed for an initial term equal to or greater than twelve months for any vacant space; this includes a new tenant or an existing tenant that is expanding into new (additional) space.

(7) We define a Renewal Lease as a lease signed by an existing tenant to extend the term for twelve months or more, including (i) a renewal of the same space as the current lease at lease expiration, (ii) a renewal of only a portion of the current space at lease expiration and (iii) an early renewal or workout, which ultimately does extend the original term for twelve months or more.

Property Operating Expenses

Our property operating expenses generally consist of utilities, real estate taxes, management fees, insurance, and site repair and maintenance costs. For the majority of our tenants, our property operating expenses are controlled, in part, by the triple net provisions in tenant leases. In our triple net leases, the tenant is responsible for all aspects of and costs related to the building and its operation during the lease term, including utilities, taxes, insurance and maintenance costs. However, we also have modified gross leases and gross leases in our building portfolio. The terms of those leases vary and on some occasions we may absorb certain building related expenses of our tenants. In our modified gross leases, we are responsible for some building related expenses during the lease term, but the cost of most of the expenses is passed through to the tenant for reimbursement to us. In our gross leases, we are responsible for all costs related to the building and its operation during the lease term. Our overall performance will be affected by the extent to which we are able to pass-through property operating expenses to our tenants.

Scheduled Lease Expirations

Our ability to re-lease space subject to expiring leases will impact our results of operations and is affected by economic and competitive conditions in our markets and by the desirability of our individual buildings. Leases that comprise approximately 10.3% of our annualized base rental revenue will expire during the period from April 1, 2018 to March 31, 2019, excluding month to month leases. We assume, based upon internal renewal probability estimates that some of our tenants will renew and others will vacate and the associated space will be re-let subject to downtime assumptions. Using the aforementioned assumptions, we expect that the rental rates on the respective new leases will generally be higher than the rates under existing leases expiring during the period April 1, 2018 to March 31, 2019, thereby resulting in slightly higher revenue from the same space.

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The following table sets forth a summary of lease expirations for leases in place as of March 31, 2018, plus available space, for each of the ten calendar years beginning with 2018 and thereafter in our portfolio. The information in the table assumes that tenants exercise no renewal options and no early termination rights.

Lease Expiration Year	Number of Leases Expiring	Total Rentable Square Feet	% of Total Occupied Square Feet		Total Annualized Base Rental  Revenue (in thousands)		% of Total Annualized Base Rental Revenue
Available	—	3,756,403	—		—		—
Month-to-month leases	7	260,270	0.4	%	$	1,004	0.4	%
Remainder of 2018	24	3,588,645	5.4	%	15,675		5.7	%
2019	56	9,410,299	14.0	%	38,607		13.9	%
2020	49	9,640,197	14.4	%	41,128		14.9	%
2021	67	10,655,672	15.9	%	44,094		15.9	%
2022	47	6,036,112	9.0	%	25,861		9.3	%
2023	35	6,859,589	10.2	%	26,100		9.4	%
2024	20	3,904,903	5.8	%	15,612		5.7	%
2025	16	2,737,758	4.1	%	11,757		4.2	%
2026	22	4,869,084	7.3	%	18,918		6.8	%
2027	10	1,768,969	2.6	%	7,868		2.8	%
Thereafter	32	7,266,224	10.9	%	30,394		11.0	%
Total/weighted average	385	70,754,125	100.0	%	$	277,018	100.0	%

Portfolio Summary

The following table sets forth information relating to diversification by building type in our portfolio as of March 31, 2018.

		Square Footage					Annualized Base Rental Revenue
Building Type	Number of Buildings	Amount	%		Occupancy Rate(1)		Amount (in thousands)		%
Warehouse/Distribution	286	62,370,410	88.2	%	95.2	%	$	240,317	86.8	%
Light Manufacturing	55	6,165,059	8.7	%	100.0	%	26,437		9.5	%
Total Operating Portfolio/weighted average	341	68,535,469	96.9	%	95.6	%	$	266,754	96.3	%
Value Add	5	1,295,295	1.8	%	66.5	%	3,655		1.3	%
Flex/Office	14	923,361	1.3	%	63.7	%	6,609		2.4	%
Total portfolio/weighted average	360	70,754,125	100.0	%	94.7	%	$	277,018	100.0	%

(1) We define Occupancy Rate as the percentage of total leasable square footage for which either revenue recognition has commenced in accordance with GAAP or the lease term has commenced as of the close of the reporting period, whichever occurs earlier.

Portfolio Acquisitions

The following table summarizes our acquisitions during the three months endedMarch 31, 2018.

Location	Square Feet	Buildings	Purchase Price (in thousands)
Fountain Inn, SC	203,000	1	$	10,755
Bloomington, MN	145,351	1	13,538
York, PA	278,582	1	18,277
Houston, TX	242,225	2	22,478
Greer, SC	222,710	1	13,773
Three months ended March 31, 2018	1,091,868	6	$	78,821

Portfolio Dispositions

During the three months ended March 31, 2018, we sold two buildings comprised of approximately 0.7 million square feet with a net book value of approximately $26.9 million to third parties. These buildings contributed approximately $0.3 million and $0.9 million to revenue for the three months ended March 31, 2018 and 2017, respectively. These buildings contributed approximately $49,000 and $46,000 and to net income (exclusive of loss on involuntary conversion and gain on the sales of rental property, net) for the three months ended March 31, 2018 and 2017, respectively. Net proceeds from the sales of rental property were approximately $49.6 million and we recognized the full gain on the sales of rental property, net of approximately $22.7 million for the three months ended March 31, 2018.

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Geographic Diversification

The following table sets forth information about the ten largest markets in our portfolio based on total annualized base rental revenue as of March 31, 2018.

Top Ten Markets (1)	% of Total Annualized Base Rental Revenue
Philadelphia, PA	10.2	%
Chicago, IL	9.1	%
Greenville/Spartanburg, SC	5.0	%
Milwaukee/Madison, WI	3.8	%
Cincinnati/Dayton, OH	3.3	%
Charlotte, NC	3.2	%
Detroit, MI	3.2	%
Houston, TX	2.8	%
West Michigan, MI	2.6	%
El Paso, TX	2.6	%
Total	45.8	%

(1) As defined by CoStar Realty Information Inc.

Industry Diversification

The following table sets forth information about the ten largest tenant industries in our portfolio based on total annualized base rental revenue as of March 31, 2018.

Top Ten Tenant Industries	% of Total Annualized Base Rental Revenue
Capital Goods	13.6	%
Automobiles & Components	12.9	%
Materials	11.6	%
Transportation	9.9	%
Consumer Durables & Apparel	9.7	%
Food, Beverage & Tobacco	8.5	%
Commercial & Prof Services	7.4	%
Retailing	5.4	%
Household & Personal Products	5.0	%
Food & Staples Retailing	3.7	%
Total	87.7	%

Top Tenants

The following table sets forth information about the ten largest tenants in our portfolio based on total annualized base rental revenue as of March 31, 2018.

Top Ten Tenants	Number of Leases	% of Total Annualized Base Rental Revenue
General Services Administration	1	2.5	%
XPO Logistics	4	2.0	%
Deckers Outdoor	2	1.6	%
Solo Cup	1	1.4	%
TriMas Corporation	4	1.3	%
DHL	4	1.1	%
FedEx	3	1.0	%
Generation Brands	1	1.0	%
Carolina Beverage Group	2	0.9	%
Emerson Electric	2	0.9	%
Total	24	13.7	%

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Critical Accounting Policies

See “Critical Accounting Policies” in “Management's Discussion and Analysis of Financial Condition and Results of Operations” in our Annual Report on Form 10-K for the year ended December 31, 2017, for a discussion of our critical accounting policies and estimates.

Results of Operations

The following discussion of our results of our same store (as defined below) net operating income (“NOI”) should be read in conjunction with our Consolidated Financial Statements. For a detailed discussion of NOI, including the reasons management believes NOI is useful to investors, see “Non-GAAP Financial Measures” below. Same store results are considered to be useful to investors in evaluating our performance because they provide information relating to changes in building-level operating performance without taking into account the effects of acquisitions or dispositions. We encourage the reader to not only look at our same store results, but also our total portfolio results, due to historic and future growth.

Comparison of the three months ended March 31, 2018 to the three months ended March 31, 2017

We define same store properties as properties that were in the Operating Portfolio for the entirety of the comparative periods presented. Same store properties exclude Operating Portfolio properties with expansions placed into service after the first day of the earliest comparable period presented. On March 31, 2018, we owned 282 industrial buildings consisting of approximately 56.1 square feet, which represents approximately 79.2% of our total portfolio, that are considered our same store portfolio in the analysis below. Same store occupancy decreased approximately 0.9% to 95.6% as of March 31, 2018 compared to 96.5% as of March 31, 2017.

The following table summarizes selected operating information for our same store portfolio and our total portfolio for the three months ended March 31, 2018 and 2017 (dollars in thousands). This table includes a reconciliation from our same store portfolio to our total portfolio by also providing information for the three months ended March 31, 2018 and 2017 with respect to the buildings acquired and disposed of or Operating Portfolio buildings with expansions placed into service or transferred from the Value Add Portfolio to the Operating Portfolio after January 1, 2017 and our flex/office buildings and Value Add Portfolio.

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	Same Store Portfolio									Acquisitions/Dispositions				Other (1)				Total Portfolio
	Three months ended March 31,				Change					Three months ended March 31,				Three months ended March 31,				Three months ended March 31,						Change
	2018		2017		$			%		2018		2017		2018		2017		2018			2017			$			%
Revenue
Operating revenue
Rental income	$	54,127	$	54,016	$	111		0.2	%	$	12,123	$	3,171	$	3,678	$	2,035	$	69,928		$	59,222		$	10,706		18.1	%
Tenant recoveries	9,784		8,861		923			10.4	%	2,483		724		932		600		13,199			10,185			3,014			29.6	%
Other income	64		36		28			77.8	%	—		7		92		30		156			73			83			113.7	%
Total operating revenue	63,975		62,913		1,062			1.7	%	14,606		3,902		4,702		2,665		83,283			69,480			13,803			19.9	%
Expenses
Property	12,421		11,069		1,352			12.2	%	3,005		840		2,073		1,367		17,499			13,276			4,223			31.8	%
Net operating income (2)	$	51,554	$	51,844	$	(290	)	(0.6	)%	$	11,601	$	3,062	$	2,629	$	1,298	65,784			56,204			9,580			17.0	%
Other expenses
General and administrative																		8,748			8,771			(23		)	(0.3	)%
Property acquisition costs																		—			740			(740		)	(100.0	)%
Depreciation and amortization																		39,965			35,953			4,012			11.2	%
Loss on impairments																		2,934			—			2,934			100.0	%
Loss on involuntary conversion																		—			330			(330		)	(100.0	)%
Other expenses																		291			194			97			50.0	%
Total other expenses																		51,938			45,988			5,950			12.9	%
Total expenses																		69,437			59,264			10,173			17.2	%
Other income (expense)
Interest expense																		(11,386		)	(10,472		)	(914		)	8.7	%
Gain on the sales of rental property, net																		22,689			325			22,364			6,881.2	%
Total other income (expense)																		11,303			(10,147		)	21,450			211.4	%
Net income																		$	25,149		$	69		$	25,080		36,347.8	%

(1) Includes flex/office buildings, Value Add Portfolio, and Operating Portfolio buildings with expansions placed in service or transferred from the Value Add Portfolio to the Operating Portfolio after January 1, 2017.

(2) For a detailed discussion of NOI, including the reasons management believes NOI is useful to investors, see “Non-GAAP Financial Measures” below.

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Net Income

Net income for our total portfolio increased by $25.1 million or 36,347.8% to $25.1 million for the three months ended March 31, 2018, compared to $0.1 million for the three months ended March 31, 2017.

Same Store Total Operating Revenue

Same store total operating revenue consists primarily of (i) rental income consisting of base rent, termination income, straight-line rent and above and below market lease amortization from our properties, and (ii) tenant reimbursements for insurance, real estate taxes and certain other expenses (“tenant recoveries”).

For a detailed reconciliation of our same store total operating revenue to net income, see the table above.

Same store rental income increased by $0.1 million or 0.2% to $54.1 million for the three months ended March 31, 2018 compared to $54.0 million for the three months ended March 31, 2017. Approximately $1.8 million of the increase was attributable to rental increases due to new leases and renewals of existing tenants. Same store rental income also increased approximately $0.1 million due to a net decrease in the amortization of net above market leases. These increases were partially offset by an approximately $1.6 million decrease due to a reduction of base rent due to tenants downsizing their spaces and vacancies, as well as a $0.2 million decrease in the recognition of straight-line income from termination fees at certain buildings.

Same store tenant recoveries increased by $0.9 million or 10.4% to $9.8 million for the three months ended March 31, 2018 compared to $8.9 million for the three months ended March 31, 2017. Approximately $1.1 million of the increase was primarily due to increases in occupancy and real estate taxes levied by the taxing authority, as well as changes to lease terms where we began paying the real estate taxes and operating expenses on behalf of tenants that had previously paid its taxes and operating expenses directly to respective vendors. This increase was partially offset by a decrease of approximately $0.2 million related to vacancy of previously occupied buildings and decreases in real estate taxes levied by the taxing authority.

Same Store Operating Expenses

Same store operating expenses consist primarily of property operating expenses and real estate taxes and insurance.

For a detailed reconciliation of our same store operating expenses to net income, see the table above.

Total same store operating expenses increased by $1.4 million or 12.2% to $12.4 million for the three months ended March 31, 2018 compared to $11.1 million for the three months ended March 31, 2017. This increase was primarily related to increases in real estate taxes levied by the related taxing authority of approximately $0.7 million, an increase of approximately $0.3 million in snow removal expenses, and an increase of approximately $0.4 million in general repairs and maintenance and utilities expenses.

Acquisitions and Dispositions Net Operating Income

For a detailed reconciliation of our acquisitions and dispositions net operating income to net income, see the table above.

Subsequent to January 1, 2017, we acquired 54 buildings consisting of approximately 11.1 million square feet (excluding five buildings that were included in the Value Add Portfolio at March 31, 2018 or transferred from the Value Add Portfolio to the Operating Portfolio after January 1, 2017), and sold 13 buildings consisting of approximately 2.6 million square feet. For the three months ended March 31, 2018 and 2017, the buildings acquired after January 1, 2017 contributed approximately $11.5 million and $1.2 million to NOI, respectively. For the three months ended March 31, 2018 and 2017, the buildings sold after January 1, 2017 contributed approximately $0.1 million and $1.9 million to NOI, respectively. Refer to Note 3 in the accompanying Notes to Consolidated Financial Statements for additional discussion regarding buildings acquired or sold.

Other Net Operating Income

Our other assets include our flex/office buildings, Value Add Portfolio, and Operating Portfolio buildings with expansions placed in service or transferred from the Value Add Portfolio to the Operating Portfolio after January 1, 2017.

For a detailed reconciliation of our other net operating income to net income, see the table above.

At March 31, 2018, we owned 14 flex/office buildings consisting of approximately 0.9 million square feet, five buildings in our Value Add Portfolio consisting of approximately 1.3 million square feet, and five buildings consisting of approximately 1.4 million

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square feet that were Operating Portfolio buildings with expansions placed in service or transferred from the Value Add Portfolio to the Operating Portfolio after January 1, 2017. These buildings contributed approximately $2.6 million and $1.3 million to NOI for the three months ended March 31, 2018 and 2017, respectively.

Total Other Expenses

Total other expenses consist of general and administrative expense, property acquisition costs, depreciation and amortization, loss on impairments, loss on involuntary conversion, and other expenses.

Total other expenses increased$6.0 million or 12.9% for the three months ended March 31, 2018 to $51.9 million compared to $46.0 million for the three months ended March 31, 2017. This is primarily a result of an increase in depreciation and amortization of approximately $4.0 million as a result of buildings acquired which increased the depreciable asset base. The increase was also attributable to two buildings that were impaired in the amount of approximately $2.9 million during the three months ended March 31, 2018, whereas there were no buildings impaired during the three months ended March 31, 2017. These increases were partially offset by a decrease in property acquisition costs of approximately $0.7 million due to the adoption of Accounting Standards Update 2017-01, as discussed in Note 2 of the accompanying Notes to Consolidated Financial Statements. Additionally, general and administrative expenses decreased slightly due to a net decrease in cash compensation, as well as lower non-cash compensation expense as the 2015 restricted shares of common stock and LTIP unit grants were on a three-year vesting schedule and have fully vested, whereas the remaining grants will be recognized based on a four-year vesting schedule.

Total Other Income (Expense)

Total other income (expense) consists of interest expense and gain on the sales of rental property, net. Interest expense includes interest incurred during the period as well as adjustments related to amortization of financing fees and debt issuance costs, and amortization of fair market value adjustments associated with the assumption of debt.

Total other income (expense) increased $21.5 million or 211.4% to a net other income position of $11.3 million for the three months ended March 31, 2018 compared to a net other expense of $10.1 million for the three months ended March 31, 2017. This increase is primarily the result of an increase in the gain on the sales of rental property, net of approximately $22.4 million. This was offset by an increase in interest expense of approximately $0.9 million which was primarily attributable to a higher unsecured credit facility balance during the three months ended March 31, 2018 compared to the three months ended March 31, 2017, which was slightly offset by the repayment of several mortgage notes during the year ended December 31, 2017.

Non-GAAP Financial Measures

In this report, we disclose funds from operations (“FFO”) and NOI, which meet the definition of “non-GAAP financial measures” as set forth in Item 10(e) of Regulation S-K promulgated by the Securities and Exchange Commission (“SEC”). As a result, we are required to include in this report a statement of why management believes that presentation of these measures provides useful information to investors.

Funds From Operations

FFO should not be considered as an alternative to net income (determined in accordance with GAAP) as an indication of our performance, and we believe that to understand our performance further, FFO should be compared with our reported net income (loss) in accordance with GAAP, as presented in our consolidated financial statements included in this report.

We calculate FFO in accordance with the standards established by the National Association of Real Estate Investment Trusts (“NAREIT”). FFO represents GAAP net income (loss), excluding gains (or losses) from sales of depreciable operating buildings, impairment write-downs of depreciable real estate, real estate related depreciation and amortization (excluding amortization of deferred financing costs and fair market value of debt adjustment) and after adjustments for unconsolidated partnerships and joint ventures.

Management uses FFO as a supplemental performance measure because it is a widely recognized measure of the performance of REITs. FFO may be used by investors as a basis to compare our operating performance with that of other REITs.

However, because FFO excludes depreciation and amortization and captures neither the changes in the value of our buildings that result from use or market conditions nor the level of capital expenditures and leasing commissions necessary to maintain the operating performance of our buildings, all of which have real economic effects and could materially impact our results from operations, the utility of FFO as a measure of our performance is limited. In addition, other REITs may not calculate FFO in

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accordance with the NAREIT definition, and, accordingly, our FFO may not be comparable to such other REITs’ FFO. FFO should not be used as a measure of our liquidity, and is not indicative of funds available for our cash needs, including our ability to pay dividends.

The following table sets forth a reconciliation of our FFO attributable to common stockholders and unit holders for the periods presented to net income, the nearest GAAP equivalent.

	Three months ended March 31,
Reconciliation of Net Income to FFO (in thousands)	2018			2017
Net income	$	25,149		$	69
Rental property depreciation and amortization	39,892			35,879
Loss on impairments	2,934			—
Gain on the sales of rental property, net	(22,689		)	(325		)
FFO	45,286			35,623
Preferred stock dividends	(2,448		)	(2,448		)
FFO attributable to common stockholders and unit holders	$	42,838		$	33,175

Net Operating Income

We consider NOI to be an appropriate supplemental performance measure to net income (loss) because we believe it helps investors and management understand the core operations of our buildings. NOI is defined as rental revenue, including reimbursements, less property expenses and real estate taxes and insurance. NOI should not be viewed as an alternative measure of our financial performance since it excludes expenses which could materially impact our results of operations. Further, our NOI may not be comparable to that of other real estate companies, as they may use different methodologies for calculating NOI.

The following table sets forth a reconciliation of our NOI for the periods presented to net income, the nearest GAAP equivalent.

	Three months ended March 31,
Reconciliation of Net Income to NOI (in thousands)	2018			2017
Net income	$	25,149		$	69
Asset management fee income	—			(30		)
General and administrative	8,748			8,771
Property acquisition costs	—			740
Depreciation and amortization	39,965			35,953
Interest expense	11,386			10,472
Loss on impairments	2,934			—
Loss on involuntary conversion	—			330
Other expenses	291			194
Gain on the sales of rental property, net	(22,689		)	(325		)
Net operating income	$	65,784		$	56,174

Cash Flows

Comparison of the three months ended March 31, 2018 to the three months ended March 31, 2017

The following table summarizes our cash flows for the three months ended March 31, 2018 compared to the three months ended March 31, 2017.

	Three months ended March 31,					Change
Cash Flows (dollars in thousands)	2018			2017		$			%
Net cash provided by operating activities	$	41,974		$	31,408	$	10,566		33.6	%
Net cash used in investing activities	$	36,112		$	102,089	$	(65,977	)	(64.6	)%
Net cash provided by (used in) financing activities	$	(16,277	)	$	64,678	$	(80,955	)	(125.2	)%

Net cash provided by operating activitiesincreased$10.6 million to $42.0 million for the three months ended March 31, 2018 compared to $31.4 million for the three months ended March 31, 2017. The increase was primarily attributable to incremental operating cash flows from property acquisitions completed after January 1, 2017, and operating performance at existing properties. These increases were partially offset by the loss of cash flows from property dispositions completed after January 1, 2017 and fluctuations in working capital due to timing of payments and rental receipts.

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Net cash used in investing activitiesdecreased$66.0 million to $36.1 million for the three months ended March 31, 2018 compared to $102.1 million for the three months ended March 31, 2017. The decreased cash outflow was primarily due to the acquisition of six buildings for a total cash consideration of approximately $78.8 million for the three months ended March 31, 2018 compared to the acquisition of 11 buildings for a total cash consideration of approximately $99.8 million for the three months ended March 31, 2017. The decrease is also attributable to the sale of two buildings during the three months ended March 31, 2018 for net proceeds of approximately $49.6 million, compared to the three months ended March 31, 2017 where we sold one building for net proceeds of approximately $3.9 million.

Net cash used in financing activities was $16.3 million for the three months ended March 31, 2018, a decrease of $81.0 million from net cash provided by financing activities of $64.7 million for the three months ended March 31, 2017. The change was primarily due to an increase in net cash outflow on our unsecured credit facility of approximately $96.0 million and a decrease in proceeds from sales of common stock of approximately $68.5 million, as well as a $0.004999 increase in the dividend paid per share during the three months ended March 31, 2018 compared to the three months ended March 31, 2017. These increases in net cash outflow were partially offset by the $75.0 million draw on the unsecured term loan that was entered into on July 28, 2017, as well as a decrease in the repayment of mortgage notes of approximately $11.7 million during the three months ended March 31, 2018 compared to the three months ended March 31, 2017.

Liquidity and Capital Resources

We believe that our liquidity needs will be satisfied through cash flows generated by operations, disposition proceeds, and financing activities. Operating cash flow is primarily rental income, expense recoveries from tenants, and other income from operations and is our principal source of funds that we use to pay operating expenses, debt service, recurring capital expenditures and the distributions required to maintain our REIT qualification. We look to the capital markets (common equity, preferred equity, and debt) to primarily fund our acquisition activity. We seek to increase cash flows from our properties by maintaining quality standards for our buildings that promote high occupancy rates and permit increases in rental rates while reducing tenant turnover and controlling operating expenses. We believe that our revenue, together with proceeds from building sales and debt and equity financings, will continue to provide funds for our short-term and medium-term liquidity needs.

Our short-term liquidity requirements consist primarily of funds to pay for operating expenses and other expenditures directly associated with our buildings, including interest expense, interest rate swap payments, scheduled principal payments on outstanding indebtedness, funding of property acquisitions under contract, general and administrative expenses, and capital expenditures for tenant improvements and leasing commissions.

Our long-term liquidity needs, in addition to recurring short-term liquidity needs as discussed above, consist primarily of funds necessary to pay for acquisitions, non-recurring capital expenditures, and scheduled debt maturities. We intend to satisfy our long-term liquidity needs through cash flow from operations, the issuance of equity or debt securities, other borrowings, property dispositions, or, in connection with acquisitions of certain additional buildings, the issuance of common units in the Operating Partnership.

As of March 31, 2018, we had total immediate liquidity of approximately 311.6 million, comprised of $10.5 million of cash and cash equivalents and 301.1 million of immediate availability on our unsecured credit facility and unsecured term loans.

In addition, we require funds for future dividends to be paid to our common and preferred stockholders and common unit holders in our Operating Partnership. The table below sets forth the dividends attributable to our outstanding common stock that had a record date during the three months ended March 31, 2018. These distributions on our common stock are voluntary (at the discretion of our board of directors), to the extent we have satisfied distribution requirements in order to maintain our REIT status for federal income tax purposes, and may be reduced or stopped if needed to fund other liquidity requirements or for other reasons.

Month Ended 2018	Declaration Date	Record Date	Per Share		Payment Date
March 31	November 2, 2017	March 29, 2018	0.118333		April 16, 2018
February 28	November 2, 2017	February 28, 2018	0.118333		March 15, 2018
January 31	November 2, 2017	January 31, 2018	0.118333		February 15, 2018
Total			$	0.354999

On April 10, 2018, our board of directors declared the common stock dividends for the months ending April 30, 2018, May 31, 2018 and June 30, 2018 at a monthly rate of $0.118333 per share of common stock.

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We pay quarterly cumulative dividends on the 6.625% Series B Cumulative Redeemable Preferred Stock (“Series B Preferred Stock”) and the Series C Preferred Stock (collectively, the “Preferred Stock Issuances”) at a rate equivalent to the fixed annual rate of $1.65625 and $1.71875 per share, respectively. The table below sets forth the dividends on the Preferred Stock Issuances during the three months ended March 31, 2018.

Quarter Ended 2018	Declaration Date	Series B Preferred Stock Per Share		Series C Preferred Stock Per Share		Payment Date
March 31	February 14, 2018	0.4140625		0.4296875		April 2, 2018
Total		$	0.4140625	$	0.4296875

On April 10, 2018, our board of directors declared the Series B Preferred Stock and Series C Preferred Stock dividends for the quarter ending June 30, 2018 at a quarterly rate of $0.4140625 per share and $0.4296875 per share, respectively.

Indebtedness Outstanding

The following table sets forth certain information with respect to our indebtedness outstanding as of March 31, 2018.

Loan	Principal Outstanding as of March 31, 2018 (in thousands)			Interest  Rate (1)		Maturity Date	Prepayment Terms (2)
Unsecured credit facility:
Unsecured Credit Facility (3)	$	218,000		L + 1.15%		Dec-18-2019	i
Total unsecured credit facility	218,000
Unsecured term loans:
Unsecured Term Loan C	150,000			L + 1.30%		Sep-29-2020	i
Unsecured Term Loan B	150,000			L + 1.30%		Mar-21-2021	i
Unsecured Term Loan A	150,000			L + 1.30%		Mar-31-2022	i
Unsecured Term Loan D (4)	75,000			L + 1.30%		Jan-04-2023	i
Total unsecured term loans	525,000
Less: Total unamortized deferred financing fees and debt issuance costs	(3,494		)
Total carrying value unsecured term loans, net	521,506
Unsecured notes:
Series F Unsecured Notes	100,000			3.98	%	Jan-05-2023	ii
Series A Unsecured Notes	50,000			4.98	%	Oct-1-2024	ii
Series D Unsecured Notes	100,000			4.32	%	Feb-20-2025	ii
Series B Unsecured Notes	50,000			4.98	%	Jul-1-2026	ii
Series C Unsecured Notes	80,000			4.42	%	Dec-30-2026	ii
Series E Unsecured Notes	20,000			4.42	%	Feb-20-2027	ii
Total unsecured notes	400,000
Less: Total unamortized deferred financing fees and debt issuance costs	(1,774		)
Total carrying value unsecured notes, net	398,226
Mortgage notes (secured debt):
Wells Fargo Bank, National Association CMBS Loan	54,515			4.31	%	Dec-1-2022	iii
Thrivent Financial for Lutherans	3,879			4.78	%	Dec-15-2023	iv
Total mortgage notes	58,394
Total unamortized fair market value premiums	58
Less: Total unamortized deferred financing fees and debt issuance costs	(601		)
Total carrying value mortgage notes, net	57,851
Total / weighted average interest rate (5)	$	1,195,583		3.56	%

(1) Interest rate as of March 31, 2018. At March 31, 2018, the one-month LIBOR (“L”) was 1.88313%. The interest rate is not adjusted to include the amortization of deferred financing fees or debt issuance costs incurred in obtaining debt or any unamortized fair market value premiums. The spread over the applicable rate for our unsecured credit facility and unsecured term loans is based on our consolidated leverage ratio, as defined in the respective loan agreements.

(2) Prepayment terms consist of (i) pre-payable with no penalty; (ii) pre-payable with penalty; (iii) pre-payable without penalty three months prior to the maturity date, however can be defeased beginning January 1, 2016; and (iv) pre-payable without penalty three months prior to the maturity date.

(3) The capacity of the unsecured credit facility is $450.0 million.

(4) The remaining capacity is $75.0 million, which we have until July 27, 2018 to draw.

(5) The weighted average interest rate was calculated using the fixed interest rate swapped on the notional amount of $600.0 million of debt that was in effect as of March 31, 2018, and is not adjusted to include the amortization of deferred financing fees or debt issuance costs incurred in obtaining debt or any unamortized fair market value premiums.

The aggregate undrawn nominal commitments on the unsecured credit facility and unsecured term loans as of March 31, 2018 was approximately $301.1 million, including issued letters of credit. Our actual borrowing capacity at any given point in time may be less and is restricted to a maximum amount based on our debt covenant compliance.

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Our unsecured credit facility, unsecured term loans, unsecured notes, and mortgage notes are subject to ongoing compliance with a number of financial and other covenants. As of March 31, 2018, we were in compliance with the applicable financial covenants.

On March 28, 2018, we drew $75.0 million of the $150.0 million unsecured term loan that was entered into on July 28, 2017.

The chart below details our debt capital structure as of March 31, 2018.

Debt Capital Structure	March 31, 2018
Total principal outstanding (in thousands)	$	1,201,394
Weighted average duration (years)	4.3
% Secured debt	5		%
% Debt maturing next 12 months	—		%
Net Debt to Real Estate Cost Basis (1)	39		%

(1) We define Net Debt as our amounts outstanding under our unsecured credit facility, unsecured term loans, unsecured notes, and mortgage notes, less cash and cash equivalents. We define Real Estate Cost Basis as the book value of rental property and deferred leasing intangibles, exclusive of the related accumulated depreciation and amortization.

We regularly pursue new financing opportunities to ensure an appropriate balance sheet position. As a result of these dedicated efforts, we are confident in our ability to meet future debt maturities and building acquisition funding needs. We believe that our current balance sheet is in an adequate position at the date of this filing, despite possible volatility in the credit markets.

Our interest rate exposure as it relates to interest expense payments on our floating rate debt is managed through our use of interest rate swaps, which fix the rate of our long term floating rate debt. For a detailed discussion on our use of interest rate swaps, see “Interest Rate Risk” below.

Equity

Preferred Stock

The table below sets forth our outstanding Preferred Stock Issuances as of March 31, 2018.

Preferred Stock Issuances	Issuance Date	Number of Shares	Liquidation Value Per Share		Interest Rate
6.625% Series B Cumulative Redeemable Preferred Stock	April 16, 2013	2,800,000	$	25.00	6.625	%
6.875% Series C Cumulative Redeemable Preferred Stock	March 17, 2016	3,000,000	$	25.00	6.875	%

The Preferred Stock Issuances rank on parity and rank senior to our common stock with respect to dividend rights andrights upon the liquidation, dissolution or winding up of our affairs. The Preferred Stock Issuances have no stated maturity date and are not subject to mandatory redemption or any sinking fund. Generally, we are not permitted to redeem the Series B Preferred Stock and Series C Preferred Stock prior to April 16, 2018 and March 17, 2021, respectively, except in limited circumstances relating to our ability to qualify as a REIT and in certain other circumstances related to a change of control.

Common Stock

The following sets forth our at-the-market (“ATM”) common stock offering program as of March 31, 2018. We may from time to time sell common stock through sales agents under the program. There was no activity under the ATM common stock offering program during the three months ended March 31, 2018.

ATM Common Stock Offering Program	Date	Maximum Aggregate Offering Price (in thousands)		Aggregate Common Stock Available as of March 31, 2018 (in thousands)
2017 $500 million ATM	November 13, 2017	$	500,000	$	489,674

36

Noncontrolling Interest

We own our interests in all of our properties and conduct substantially all of our business through our Operating Partnership. We are the sole member of the sole general partner of the Operating Partnership. As of March 31, 2018, we owned approximately 95.8% of the common units of our Operating Partnership, and our current and former executive officers, directors, senior employees and their affiliates, and third parties who contributed properties to us in exchange for common units in our Operating Partnership, owned the remaining 4.2%.

Interest Rate Risk

We use interest rate swaps to fix the rate of our variable rate debt. As of March 31, 2018, all of our outstanding variable rate debt, with the exception of $143.0 million under our unsecured credit facility, was fixed with interest rate swaps.

We recognize all derivatives on the balance sheet at fair value. If the derivative is designated as a hedge, depending on the nature of the hedge, changes in the fair value of derivatives are either offset against the change in fair value of the hedged assets, liabilities, or firm commitments through earnings or recognized in other comprehensive income (loss), which is a component of equity. Derivatives that are not designated as hedges must be adjusted to fair value and the changes in fair value must be reflected as income or expense.

We have established criteria for suitable counterparties in relation to various specific types of risk. We only use counterparties that have a credit rating of no lower than investment grade at swap inception from Moody’s Investor Services, Standard & Poor’s, or Fitch Ratings or other nationally recognized rating agencies.

The following table details our outstanding interest rate swaps as of March 31, 2018.

Interest Rate Derivative Counterparty	Trade Date	Effective Date	Notional Amount (in thousands)		Fair Value (in thousands)		Pay Fixed Interest Rate		Receive Variable Interest Rate	Maturity Date
Regions Bank	Mar-01-2013	Mar-01-2013	$	25,000	$	461	1.3300	%	One-month L	Feb-14-2020
Capital One, N.A.	Jun-13-2013	Jul-01-2013	$	50,000	$	595	1.6810	%	One-month L	Feb-14-2020
Capital One, N.A.	Jun-13-2013	Aug-01-2013	$	25,000	$	287	1.7030	%	One-month L	Feb-14-2020
Regions Bank	Sep-30-2013	Feb-03-2014	$	25,000	$	153	1.9925	%	One-month L	Feb-14-2020
The Toronto-Dominion Bank	Oct-14-2015	Sep-29-2016	$	25,000	$	622	1.3830	%	One-month L	Sep-29-2020
PNC Bank, N.A.	Oct-14-2015	Sep-29-2016	$	50,000	$	1,237	1.3906	%	One-month L	Sep-29-2020
Regions Bank	Oct-14-2015	Sep-29-2016	$	35,000	$	870	1.3858	%	One-month L	Sep-29-2020
U.S. Bank, N.A.	Oct-14-2015	Sep-29-2016	$	25,000	$	618	1.3950	%	One-month L	Sep-29-2020
Capital One, N.A.	Oct-14-2015	Sep-29-2016	$	15,000	$	370	1.3950	%	One-month L	Sep-29-2020
Royal Bank of Canada	Jan-08-2015	Mar-20-2015	$	25,000	$	529	1.7090	%	One-month L	Mar-21-2021
The Toronto-Dominion Bank	Jan-08-2015	Mar-20-2015	$	25,000	$	526	1.7105	%	One-month L	Mar-21-2021
The Toronto-Dominion Bank	Jan-08-2015	Sep-10-2017	$	100,000	$	615	2.2255	%	One-month L	Mar-21-2021
Wells Fargo, N.A.	Jan-08-2015	Mar-20-2015	$	25,000	$	646	1.8280	%	One-month L	Mar-31-2022
The Toronto-Dominion Bank	Jan-08-2015	Feb-14-2020	$	25,000	$	105	2.4535	%	One-month L	Mar-31-2022
Regions Bank	Jan-08-2015	Feb-14-2020	$	50,000	$	188	2.4750	%	One-month L	Mar-31-2022
Capital One, N.A.	Jan-08-2015	Feb-14-2020	$	50,000	$	135	2.5300	%	One-month L	Mar-31-2022
The Toronto-Dominion Bank	Jul-20-2017	Oct-30-2017	$	25,000	$	768	1.8485	%	One-month L	Jan-04-2023
Royal Bank of Canada	Jul-20-2017	Oct-30-2017	$	25,000	$	770	1.8505	%	One-month L	Jan-04-2023
Wells Fargo, N.A.	Jul-20-2017	Oct-30-2017	$	25,000	$	770	1.8505	%	One-month L	Jan-04-2023
PNC Bank, N.A.	Jul-20-2017	Oct-30-2017	$	25,000	$	770	1.8485	%	One-month L	Jan-04-2023
PNC Bank, N.A.	Jul-20-2017	Oct-30-2017	$	50,000	$	1,542	1.8475	%	One-month L	Jan-04-2023

The swaps outlined in the above table were all designated as cash flow hedges of interest rate risk, and all are valued as Level 2 financial instruments. Level 2 financial instruments are defined as significant other observable inputs. As of March 31, 2018, the fair value of all of our 21 interest rate swaps were in an asset position of approximately $12.6 million, including any adjustment for nonperformance risk related to these agreements.

As of March 31, 2018, we had $743.0 million of variable rate debt. As of March 31, 2018, all of our outstanding variable rate debt, with exception of $143.0 million under our unsecured credit facility, was fixed with interest rate swaps. To the extent interest rates increase, interest costs on our floating rate debt not fixed with interest rate swaps will increase, which could adversely affect our cash flow and our ability to pay principal and interest on our debt and our ability to make distributions to our security holders. From time to time, we may enter into interest rate swap agreements and other interest rate hedging contracts, including swaps,

37

caps and floors. In addition, an increase in interest rates could decrease the amounts third parties are willing to pay for our assets, thereby limiting our ability to change our portfolio promptly in response to changes in economic or other conditions.

Off-balance Sheet Arrangements

As of March 31, 2018, we had letters of credit related to development projects and certain other agreements of approximately $5.9 million. As of March 31, 2018, we had no other material off-balance sheet arrangements.

Item 3.  Quantitativeand Qualitative Disclosures about Market Risk

Our future income, cash flows and fair values relevant to financial instruments are dependent upon prevailing market interest rates. Market risk refers to the risk of loss from adverse changes in market prices and interest rates. The primary market risk we are exposed to is interest rate risk.  We have used derivative financial instruments to manage, or hedge, interest rate risks related to our borrowings, primarily through interest rate swaps.

As of March 31, 2018, we had $743.0 million of outstanding variable rate debt, all of which, with the exception of $143.0 million outstanding under our unsecured credit facility, was fixed with interest rate swaps. To the extent we undertake additional variable rate indebtedness, if interest rates increase, then so will the interest costs on our unhedged variable rate debt, which could adversely affect our cash flow and our ability to pay principal and interest on our debt and our ability to make distributions to our security holders. Further, rising interest rates could limit our ability to refinance existing debt when it matures or significantly increase our future interest expense. From time to time, we enter into interest rate swap agreements and other interest rate hedging contracts, including swaps, caps and floors. While these agreements are intended to lessen the impact of rising interest rates on us, they also expose us to the risk that the other parties to the agreements will not perform, we could incur significant costs associated with the settlement of the agreements, the agreements will be unenforceable and the underlying transactions will fail to qualify as highly-effective cash flow hedges under GAAP. In addition, an increase in interest rates could decrease the amounts third parties are willing to pay for our assets, thereby limiting our ability to change our portfolio promptly in response to changes in economic or other conditions. If interest rates increased by 100 basispoints and assuming we had an outstanding balance of $143.0 million on the unsecured credit facility (the portion outstanding at March 31, 2018 not fixed by interest rate swaps) for the three months ended March 31, 2018, our interest expense would have increased by approximately $0.4 million for the three months ended March 31, 2018.

Item 4.  Controls and Procedures

Evaluation of Disclosure Controls and Procedures

As required by SEC Rule 13a-15(b), we have evaluated, under the supervision of and with the participation of management, including our Chief Executive Officer and Chief Financial Officer, the effectiveness of the design and operation of our disclosure controls and procedures, as defined in Rules 13a-15(e) and 15d-15(e) of the Exchange Act, as of March 31, 2018. Based on the foregoing, our Chief Executive Officer and Chief Financial Officer concluded that our disclosure controls and procedures for the periods covered by this report were effective to provide reasonable assurance that information required to be disclosed by our Company in reports that we file or submit under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in SEC rules and forms and is accumulated and communicated to our management, including our Chief Executive Officer and Chief Financial Officer, as appropriate to allow timely decisions regarding required disclosure.

Changes in Internal Controls

There was no change to our internal control over financial reporting during the quarter ended March 31, 2018 that has materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.

38

PART II. Other Information

Item 1.  Legal Proceedings

From time to time, we are a party to various lawsuits, claims and other legal proceedings that arise in the ordinary course of our business. We are not currently a party, as plaintiff or defendant, to any legal proceedings which, individually or in the aggregate, would be expected to have a material effect on our business, financial condition or results of operations if determined adversely to our company.

Item 1A.  Risk Factors

There have been no material changes from the risk factors disclosed in the Annual Report on Form 10-K for the year ended December 31, 2017 filed with the SEC on February 15, 2018.

Item 2. Unregistered Sales of Equity Securities and Use of Proceeds

Issuer Purchases of Equity Securities

Period	Total Number of Shares Purchased(1)	Average Price Paid per Share(1)		Total Number of Shares Purchased as Part of Publicly Announced Plans or Programs	Approximate Dollar Value of Shares that May Yet be Purchased Under the Plans or Programs
January 1, 2018 - January 31, 2018	57,116	$	26.67	—	$	—
February 1, 2018 - February 28, 2018	42	$	23.69	—	$	—
March 1, 2018 - March 31, 2018	—	$	—	—	$	—
Total/weighted average	57,158	$	26.67	—	$	—

(1) Reflects shares surrendered to the Company for payment of tax withholdings obligations in connection with the vesting of shares of common stock issued pursuant to the STAG Industrial, Inc. 2011 Equity Incentive Plan, as amended. The average price paid reflects the average market value of shares withheld for tax purposes.

Item 3. Defaults Upon Senior Securities

None.

Item 4.  Mine SafetyDisclosures

Not applicable.

Item 5.  Other Information

None.

39

Item 6.  Exhibits

Exhibit Number	Description of Document
3.1	Second Amended and Restated Bylaws (1)
31.1	Certification of Chief Executive Officer Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
31.2	Certification of Chief Financial Officer Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
32.1	Certification of Chief Executive Officer and Chief Financial Officer Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
101 *	The following materials from STAG Industrial, Inc.’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2018 formatted in XBRL (eXtensible Business Reporting Language): (i) the Consolidated Balance Sheets, (ii) the Consolidated Statements of Operations, (iii) the Consolidated Statements of Comprehensive Income (Loss), (iv) the Consolidated Statements of Equity, (v) the Consolidated Statements of Cash Flows, and (vi) related notes to Consolidated Financial Statements

* Filed herewith.

(1) Incorporated by reference to STAG Industrial, Inc.'s Current Report on Form 8-K filed with the SEC on February 14, 2018.

40

SIGNATURES

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

		STAG INDUSTRIAL, INC.
Date: May 1, 2018	BY:	/s/ WILLIAM R. CROOKER
		William R. Crooker
		Chief Financial Officer, Executive Vice President and Treasurer (Principal Financial Officer and Principal Accounting Officer)

41

EX-31.1

Exhibit 31.1

Certification of Chief Executive Officer Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

I, Benjamin S. Butcher, certify that:

1. I have reviewed this quarterly report on Form 10-Q of STAG Industrial, Inc.;

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.

Date: May 1, 2018	/s/ BENJAMIN S. BUTCHER
	Benjamin S. Butcher Chairman, Chief Executive Officer and President

EX-31.2

Exhibit 31.2

Certification of Chief Financial Officer Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

I, William R. Crooker, certify that:

1. I have reviewed this quarterly report on Form 10-Q of STAG Industrial, Inc.;

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.

Date: May 1, 2018	/s/ WILLIAM R. CROOKER
	William R. Crooker Chief Financial Officer, Executive Vice President and Treasurer

EX-32.1

Exhibit 32.1

Certification Pursuant To

18 U.S.C. Section 1350,

as Adopted Pursuant to

Section 906 of The Sarbanes-Oxley Act of 2002

In connection with the Quarterly Report of STAG Industrial, Inc. on Form 10-Q for the period ended March 31, 2018 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), the undersigned officers of STAG Industrial, Inc., certify, pursuant to 18 U.S.C. section 1350, as adopted pursuant to Section 906 of the Sarbanes‑Oxley Act of 2002, that:

(1) the Report, containing the financial statements, fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

(2) the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of STAG Industrial, Inc.

Date: May 1, 2018	/s/ BENJAMIN S. BUTCHER
	Benjamin S. Butcher Chairman, Chief Executive Officer and President
	/s/ WILLIAM R. CROOKER
	William R. Crooker Chief Financial Officer, Executive Vice President and Treasurer

XML

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2018	Apr. 30, 2018
Document and Entity Information
Entity Registrant Name	STAG Industrial, Inc.
Entity Central Index Key	0001479094
Document Type	10-Q
Document Period End Date	Mar. 31, 2018
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		97,233,361
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	Q1

XML

Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Rental Property:
Land	$ 324,734	$ 321,560
Buildings and improvements, net of accumulated depreciation of $266,158 and $249,057, respectively	1,958,432	1,932,764
Deferred leasing intangibles, net of accumulated amortization of $215,597 and $280,642, respectively	305,188	313,253
Total rental property, net	2,588,354	2,567,577
Cash and cash equivalents	10,455	24,562
Restricted cash	7,259	3,567
Tenant accounts receivable, net	34,013	33,602
Prepaid expenses and other assets	29,776	25,364
Interest rate swaps	12,577	6,079
Assets held for sale, net	13,498	19,916
Total assets	2,695,932	2,680,667
Liabilities:
Unsecured credit facility	218,000	271,000
Unsecured term loans, net	521,506	446,265
Unsecured notes, net	398,226	398,234
Mortgage notes, net	57,851	58,282
Accounts payable, accrued expenses and other liabilities	38,294	43,216
Interest rate swaps	0	1,217
Tenant prepaid rent and security deposits	21,876	19,045
Dividends and distributions payable	14,460	11,880
Deferred leasing intangibles, net of accumulated amortization of $11,321 and $13,555, respectively	20,720	21,221
Total liabilities	1,290,933	1,270,360
Commitments and contingencies (Note 10)
Preferred stock, par value $0.01 per share, 15,000,000 shares authorized,
Common stock, par value $0.01 per share, 150,000,000 shares authorized, 97,229,588 and 97,012,543 shares issued and outstanding at March 31, 2018 and December 31, 2017, respectively	972	970
Additional paid-in capital	1,724,627	1,725,825
Common stock dividends in excess of earnings	(530,257)	(516,691)
Accumulated other comprehensive income	11,581	3,936
Total stockholders’ equity	1,351,923	1,359,040
Noncontrolling interest	53,076	51,267
Total equity	1,404,999	1,410,307
Total liabilities and equity	2,695,932	2,680,667
Series B Preferred Stock
Preferred stock, par value $0.01 per share, 15,000,000 shares authorized,
Preferred stock	70,000	70,000
Series C Preferred Stock
Preferred stock, par value $0.01 per share, 15,000,000 shares authorized,
Preferred stock	$ 75,000	$ 75,000

XML

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Building and Improvements	$ 266,158	$ 249,057
Deferred leasing intangibles assets, accumulated amortization	215,597	280,642
Deferred leasing intangibles liabilities, accumulated amortization	$ 11,321	$ 13,555
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized	15,000,000	15,000,000
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	150,000,000	150,000,000
Common Stock, shares, issued	97,229,588	97,012,543
Common stock, shares outstanding	97,229,588	97,012,543
Series B Preferred Stock
Preferred stock, shares issued	2,800,000	2,800,000
Preferred stock, shares outstanding	2,800,000	2,800,000
Preferred stock, liquidation preference (in dollars per share)	$ 25.00	$ 25.00
Series C Preferred Stock
Preferred stock, shares issued	3,000,000	3,000,000
Preferred stock, shares outstanding	3,000,000	3,000,000
Preferred stock, liquidation preference (in dollars per share)	$ 25.00	$ 25.00

XML

Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Revenue
Rental income	$ 69,928	$ 59,222
Tenant recoveries	13,199	10,185
Other income	156	73
Total revenue	83,283	69,480
Expenses
Property	17,499	13,276
General and administrative	8,748	8,771
Property acquisition costs	0	740
Depreciation and amortization	39,965	35,953
Loss on impairments	2,934	0
Loss on involuntary conversion	0	330
Other expenses	291	194
Total expenses	69,437	59,264
Other income (expense)
Interest expense	(11,386)	(10,472)
Gain on the sales of rental property, net	22,689	325
Total other income (expense)	11,303	(10,147)
Net income	25,149	69
Less: income (loss) attributable to noncontrolling interest after preferred stock dividends	954	(103)
Net income attributable to STAG Industrial, Inc.	24,195	172
Less: preferred stock dividends	2,448	2,448
Less: amount allocated to participating securities	71	83
Net income (loss) attributable to common stockholders	$ 21,676	$ (2,359)
Weighted average common shares outstanding — basic	97,021,000	81,808,000
Weighted average common shares outstanding — diluted	97,323,000	81,808,000
Net income (loss) per share — basic and diluted
Net income (loss) per share attributable to common stockholders — basic	$ 0.22	$ (0.03)
Net income (loss) per share attributable to common stockholders — diluted	$ 0.22	$ (0.03)

XML

Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Statement of Comprehensive Income [Abstract]
Net income	$ 25,149	$ 69
Other comprehensive income:
Income on interest rate swaps	7,723	1,212
Other comprehensive income	7,723	1,212
Comprehensive income	32,872	1,281
(Income) loss attributable to noncontrolling interest after preferred stock dividends	(954)	103
Other comprehensive income attributable to noncontrolling interest	(325)	(52)
Comprehensive income attributable to STAG Industrial, Inc.	$ 31,593	$ 1,332

XML

Consolidated Statements of Equity - USD ($) $ in Thousands	Total	Preferred Stock	Common Stock	Additional Paid-in Capital	Common Stock Dividends in excess of Earnings	Accumulated Other Comprehensive Income (Loss)	Total Stockholders' Equity	Noncontrolling Interest - Unit holders in Operating Partnership
Balance at Dec. 31, 2016	$ 1,066,926	$ 145,000	$ 804	$ 1,293,706	$ (410,978)	$ (1,496)	$ 1,027,036	$ 39,890
Balance (in shares) at Dec. 31, 2016			80,352,304
Increase (Decrease) in Stockholders' Equity
Proceeds from sales of common stock	68,543		$ 28	68,515			68,543
Proceeds from sales of common stock (in shares)			2,843,907
Offering costs	(1,068)			(1,068)			(1,068)
Dividends, Preferred Stock		2,448
Dividends, Common Stock					28,881
Dividends							31,329
Dividends and Distributions, Net	33,143
Distribution Made to Limited Partner, Cash Distributions Declared								1,814
Non-cash compensation activity, net	1,431			454			260	1,171
Non-cash compensation activity (in shares)			37,353
Non-cash compensation activity (in excess of earnings)			$ 0		(194)
Redemption of common units to common stock			$ 1	1,592			1,593	(1,593)
Redemption of common units to common stock (in shares)			145,029
Rebalancing of noncontrolling interest				(2,248)			(2,248)	2,248
Other comprehensive income	1,212					1,160	1,160	52
Net income	69	2,448			(2,276)		172	(103)
Balance at Mar. 31, 2017	1,103,970	145,000	$ 833	1,360,951	(442,329)	(336)	1,064,119	39,851
Balance (in shares) at Mar. 31, 2017			83,378,593
Balance at Dec. 31, 2016	1,066,926	145,000	$ 804	1,293,706	(410,978)	(1,496)	1,027,036	39,890
Balance (in shares) at Dec. 31, 2016			80,352,304
Balance at Dec. 31, 2017	1,410,307	145,000	$ 970	1,725,825	(516,691)	3,936	1,359,040	51,267
Balance (in shares) at Dec. 31, 2017			97,012,543
Increase (Decrease) in Stockholders' Equity
Cash flow hedging instruments cumulative effect adjustment (Note 2)					(258)	247	(11)	11
Offering costs	(107)			(107)			(107)
Dividends, Preferred Stock		2,448
Dividends, Common Stock					34,518
Dividends							36,966
Dividends and Distributions, Net	38,779
Distribution Made to Limited Partner, Cash Distributions Declared								1,813
Non-cash compensation activity, net	706			(855)			(1,391)	2,097
Non-cash compensation activity (in shares)			71,373
Non-cash compensation activity (in excess of earnings)			$ (1)		(537)
Redemption of common units to common stock			$ 1	1,823			1,824	(1,824)
Redemption of common units to common stock (in shares)			145,672
Rebalancing of noncontrolling interest				(2,059)			(2,059)	2,059
Other comprehensive income	7,723					7,398	7,398	325
Net income	25,149	2,448			21,747		24,195	954
Balance at Mar. 31, 2018	$ 1,404,999	$ 145,000	$ 972	$ 1,724,627	$ (530,257)	$ 11,581	$ 1,351,923	$ 53,076
Balance (in shares) at Mar. 31, 2018			97,229,588.000

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Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Cash flows from operating activities:
Net income	$ 25,149	$ 69
Adjustment to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	39,965	35,953
Loss on impairments	2,934	0
Loss on involuntary conversion	0	330
Non-cash portion of interest expense	534	345
Intangible amortization in rental income, net	1,207	1,296
Straight-line rent adjustments, net	(2,781)	(967)
Dividends on forfeited equity compensation	7	1
Gain on the sales of rental property, net	(22,689)	(325)
Non-cash compensation expense	2,220	2,387
Change in assets and liabilities:
Tenant accounts receivable, net	848	157
Prepaid expenses and other assets	(5,531)	(5,723)
Accounts payable, accrued expenses and other liabilities	(2,720)	(4,457)
Tenant prepaid rent and security deposits	2,831	2,342
Total adjustments	16,825	31,339
Net cash provided by operating activities	41,974	31,408
Cash flows from investing activities:
Acquisitions of land and buildings and improvements	(67,077)	(84,689)
Additions of land and building and improvements	(6,317)	(6,015)
Proceeds from sales of rental property, net	49,631	3,919
Proceeds from insurance on involuntary conversion	0	439
Acquisition deposits, net	(605)	(645)
Acquisitions of deferred leasing intangibles	(11,744)	(15,098)
Net cash used in investing activities	(36,112)	(102,089)
Cash flows from financing activities:
Proceeds from unsecured credit facility	110,000	141,000
Repayment of unsecured credit facility	(163,000)	(98,000)
Proceeds from unsecured term loans	75,000	0
Repayment of mortgage notes	(462)	(12,167)
Payment of loan fees and costs	(3)	(35)
Dividends and distributions	36,200	32,723
Proceeds from sales of common stock	0	68,543
Repurchase and retirement of share-based compensation	(1,524)	(969)
Offering costs	(88)	(971)
Net cash provided by (used in) financing activities	(16,277)	64,678
Decrease in cash and cash equivalents and restricted cash	(10,415)	(6,003)
Cash and cash equivalents and restricted cash—beginning of period	28,129	21,805	$ 21,805
Cash and cash equivalents and restricted cash—end of period	17,714	15,802
Supplemental disclosure:
Cash paid for interest, net of capitalized interest	11,057	10,568
Supplemental schedule of non-cash investing and financing activities
Additions to building and other capital improvements	0	503
Partial disposal of building due to involuntary conversion of building	0	221
Investing other receivables due to involuntary conversion of building	0	(221)
Change in additions of land, building, and improvements included in accounts payable, accrued expenses, and other liabilities	1,908	1,385
Additions to building and other capital improvements from non-cash compensation	(4)	(7)
Change in loan fees, costs, and offering costs included in accounts payable, accrued expenses, and other liabilities	(90)	(67)
Dividends and distributions payable	$ 14,460	$ 10,149	$ 11,880

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Organization and Description of Business

3 Months Ended

Mar. 31, 2018

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Organization and Description of Business

OrganizationandDescription of Business

STAG Industrial, Inc. (the “Company”) is an industrial real estate operating company focused on the acquisition and operation of single-tenant, industrial properties throughout the United States. The Company was formed as a Maryland corporation and has elected to be treated and intends to continue to qualify as a real estate investment trust (“REIT”) under Sections 856 through 860 of the Internal Revenue Code of 1986, as amended. The Company is structured as an umbrella partnership REIT, commonly called an UPREIT, and owns substantially all of its assets and conducts substantially all of its business through its operating partnership, STAG Industrial Operating Partnership, L.P., a Delaware limited partnership (the “Operating Partnership”). As of March 31, 2018 and December 31, 2017, the Company owned a 95.8% and 95.9%, respectively, common equity interest in the Operating Partnership. The Company, through its wholly owned subsidiary, is the sole general partner of the Operating Partnership. As used herein, the “Company” refers to STAG Industrial, Inc. and its consolidated subsidiaries and partnerships, including the Operating Partnership, except where context otherwise requires.

As of March 31, 2018, the Company owned 360 buildings in 37 states with approximately 70.8 million rentable square feet, consisting of 291 warehouse/distribution buildings, 55 light manufacturing buildings, and 14 flex/office buildings. The Company’s buildings were approximately 94.7% leased to 312 tenants as of March 31, 2018.

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Summary of Significant Accounting Policies

3 Months Ended

Mar. 31, 2018

Accounting Policies [Abstract]

Summary of Significant Accounting Policies

Summary of Significant Accounting Policies

Interim Financial Information

The accompanying interim financial statements have been presented in conformity with accounting principles generally accepted in the United States of America (“GAAP”) and with the instructions to Form 10-Q and Regulation S-X for interim financial information. Accordingly, these statements do not include all of the information and notes required by GAAP for complete financial statements. In the opinion of management, the accompanying interim financial statements include all adjustments, consisting of normal recurring items, necessary for their fair statement in conformity with GAAP. Interim results are not necessarily indicative of results for a full year. The year-end consolidated balance sheet data was derived from audited financial statements, but does not include all disclosures required by GAAP. The information included in this Quarterly Report on Form 10-Q should be read in conjunction with the Company’s consolidated financial statements and notes thereto contained in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2017.

Basis of Presentation

The Company’s consolidated financial statements include the accounts of the Company, the Operating Partnership and their subsidiaries. Interests in the Operating Partnership not owned by the Company are referred to as “Noncontrolling Common Units.” These Noncontrolling Common Units are held by other limited partners in the form of common units (“Other Common Units”) and long term incentive plan units (“LTIP units”) issued pursuant to the STAG Industrial, Inc. 2011 Equity Incentive Plan, as amended (the “2011 Plan”). All significant intercompany balances and transactions have been eliminated in the consolidation of entities. The financial statements of the Company are presented on a consolidated basis for all periods presented.

Reclassifications and New Accounting Standards

Certain prior year amounts have been reclassified to conform to the current year presentation.

New Accounting Standards Adopted

In August 2017, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2017-12, Derivatives and Hedging (Topic 815):Targeted Improvements to Accounting for Hedging Activities. The purpose of this updated guidance is to better align a company’s financial reporting for hedging activities with the economic objectives of those activities. This standard is effective for fiscal years beginning after December 15, 2018 and interim periods within those years, with early adoption permitted, and the Company adopted this standard effective January 1, 2018 using the modified retrospective transition method. The adoption of this standard resulted in a cumulative effect adjustment of approximately $0.3 million recorded as an increase to common stock dividends in excess of earnings and an increase to accumulated other comprehensive income as of January 1, 2018 in the accompanying Consolidated Statements of Equity.

In May 2017, the FASB issued ASU 2017-09, Stock Compensation (Topic 718): Scope of Modification Accounting, which provides updated guidance about which changes to the terms or conditions of a share-based payment award would require an entity to apply modification accounting under the topic. This standard is effective for fiscal years beginning after December 15, 2017 and interim periods within those years, and the Company adopted this standard prospectively effective January 1, 2018. The adoption of this standard did not have a material effect on the Company's consolidated financial statements.

In February 2017, the FASB issued ASU 2017-05, Other Income - Gains and Losses from the Derecognition of Nonfinancial Assets (Subtopic 610-20): Clarifying the Scope of Asset Derecognition Guidance and Accounting for Partial Sales of Nonfinancial Assets, which provides guidance for recognizing gains and losses from the transfer of nonfinancial assets in contracts with non-customers. The new standard was issued as part of the new revenue standard (ASU 2014-09, as discussed below), and defines “in substance nonfinancial asset,” unifies guidance related to partial sales of nonfinancial assets, eliminates rules specifically addressing sales of real estate, removes exceptions to the financial asset derecognition model, and clarifies the accounting for contributions of nonfinancial assets to joint ventures. As a result of the new guidance, the guidance specific to real estate sales in Subtopic 360-20 was eliminated, and sales and partial sales of real estate assets will now be subject to the same derecognition model as all other nonfinancial assets. This standard is effective at the same time an entity adopts ASU 2014-09, which the Company adopted effective January 1, 2018. The Company adopted this standard effective January 1, 2018 using the modified retrospective approach. The adoption of this standard did not have a material effect on the Company's consolidated financial statements.

In January 2017, the FASB issued ASU 2017-01, Business Combinations (Topic 805): Clarifying the Definition of a Business. The new standard provides a screen to determine when a set of assets and activities is not a business. The screen requires that when substantially all of the fair value of the gross assets acquired or disposed of is concentrated in a single identifiable asset or a group of similar identifiable assets, the set is not a business. This standard is effective for annual periods beginning after December 15, 2017 and interim periods within those periods, and the Company adopted this standard prospectively effective January 1, 2018. As a result, it is expected that the majority of the Company's acquisitions will be accounted for as asset acquisitions, whereas under the former guidance the majority of the Company's acquisitions had been accounted for as business combinations. The most significant difference between the two accounting models that impacts the Company's consolidated financial statements is that in an asset acquisition, property acquisition costs are generally a component of the consideration transferred to acquire a group of assets and are capitalized as a component of the cost of the assets, whereas in a business combination, property acquisition costs are expensed and not included as part of the consideration transferred.

In November 2016, the FASB issued ASU 2016-18, Statement of Cash Flows (Topic 230): Restricted Cash.The new standard requires that the statement of cash flows explain the changes during the period in the total of cash, cash equivalents, and amounts generally described as restricted cash or restricted cash equivalents. This standard is effective for fiscal years beginning after December 15, 2017 and the Company adopted this standard effective January 1, 2018. As a result, the Company has included restricted cash with cash and cash equivalents when reconciling the beginning and end of period total amounts on the accompanying Consolidated Statements of Cash Flows. The effects of this standard were applied retrospectively to all prior periods presented. For the three months ended March 31, 2017, the effect of the change in accounting principle was an increase in cash provided by operating activities of approximately $0.3 million and an increase in cash used in investing activities of approximately $1.1 million on the accompanying Consolidated Statements of Cash Flows.

In January 2016, the FASB issued ASU 2016-01, Recognition and Measurement of Financial Assets and Financial Liabilities (Subtopic 825-10). The amendments in ASU 2016-01 address certain aspects of recognition, measurement, presentation, and disclosure of financial instruments. The standard primarily affects the accounting for equity investments, financial liabilities under the fair value option, and the presentation and disclosure requirements for financial instruments. ASU 2016-01 is effective for the annual periods beginning after December 31, 2017 and for annual periods and interim periods within those years, and the Company adopted this standard prospectively effective January 1, 2018. The adoption of this standard did not have a material effect on the Company's consolidated financial statements.

In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers(Topic 606). ASU 2014-09 is a comprehensive new revenue recognition model requiring a company to recognize revenue to depict the transfer of goods or services to a customer at an amount reflecting the consideration it expects to receive in exchange for those goods or services. While lease contracts with customers, which constitute a vast majority of the Company's revenues, are specifically excluded from the model's scope, certain of the Company's revenue streams may be impacted by the new guidance. Once the new guidance setting forth principles for the recognition, measurement, presentation and disclosure of leases (ASU 2016-02, as discussed below) goes into effect, the new revenue standard may apply to executory costs and other components of revenue due under leases that are deemed to be non-lease components (such as common area maintenance and provision of utilities), even when the revenue for such activities is not separately stipulated in the lease. In that case, revenue from these items previously recognized on a straight-line basis under current lease guidance would be recognized under the new revenue guidance as the related services are delivered. As a result, while the total revenue recognized over time would not differ under the new guidance, the recognition pattern may be different. The Company is in the process of evaluating the significance of the difference in the recognition pattern that would result from this change upon the adoption of ASU 2016-02 on January 1, 2019. Additionally, the new revenue guidance requires improved disclosures regarding the nature, amount, timing and uncertainty of revenue and cash flows arising from contracts with customers. The Company adopted this standard effective January 1, 2018 using the modified retrospective approach. The adoption of this standard did not have a material effect on the Company's consolidated financial statements.

New Accounting Standards Issued but not yet Adopted

In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842), which sets out the principles for the recognition, measurement, presentation and disclosure of leases for both parties to a contract (i.e. lessees and lessors). Topic 842 supersedes the previous leases standard, Topic 840, Leases. The new standard requires lessees to apply a dual approach, classifying leases as either finance or operating leases based on the principle of whether or not the lease is effectively a financed purchase by the lessee. This classification will determine whether lease expense is recognized based on an effective interest method or on a straight line basis over the term of the lease, respectively. A lessee is also required to record a right-of-use asset and a lease liability for all leases with a term of greater than 12 months regardless of their classification. Leases with a term of 12 months or less will be accounted for similar to existing guidance for operating leases today. The new standard requires lessors to account for leases using an approach that is substantially equivalent to existing guidance for sales-type leases, direct financing leases and operating leases. ASU 2016-02 is expected to impact the Company’s consolidated financial statements as the Company has certain operating and land lease arrangements for which it is the lessee, which will result in the recording of a right of use asset and the related lease liability. The standard is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years, with early adoption permitted. The new standard must be adopted using a modified retrospective transition and will require application of the new guidance at the beginning of the earliest comparative period. The Company is currently in the process of evaluating the impact the adoption of ASU 2016-02 will have on the Company’s financial position or results of operations, and plans to adopt this standard effective January 1, 2019.

Restricted Cash

Restricted cash may include tenant security deposits and cash held in escrow for real estate taxes and capital improvements as required in various mortgage note agreements. Restricted cash also may include amounts held by the Company’s transfer agent for preferred stock dividends that are distributed subsequent to period end. The following table presents a reconciliation of cash and cash equivalents and restricted cash reported on the accompanying Consolidated Balance Sheets to amounts reported on the accompanying Consolidated Statements of Cash Flows (in thousands).

	As of March 31,
	2018		2017
Cash and cash equivalents	$	10,455	$	7,082
Restricted cash	7,259		8,720
Total cash and cash equivalents and restricted cash	$	17,714	$	15,802

Tenant Accounts Receivable, net

As of March 31, 2018 and December 31, 2017, the Company had an allowance for doubtful accounts of approximately $0.1 million and $0.1 million, respectively.

As of March 31, 2018 and December 31, 2017, the Company had accrued rental income, net of allowance of approximately $25.9 million and $24.7 million, respectively. As of March 31, 2018 and December 31, 2017, the Company had an allowance on accrued rental income of $0.1 million and $0.2 million, respectively.

As of March 31, 2018 and December 31, 2017, the Company had approximately $12.7 million and $12.7 million, respectively, of total lease security deposits available in the form of existing letters of credit, which are not reflected on the accompanying Consolidated Balance Sheets. As of March 31, 2018 and December 31, 2017, the Company had approximately $7.7 million and $7.4 million, respectively, of lease security deposits available in cash, which are included in cash and cash equivalents on the accompanying Consolidated Balance Sheets, and approximately $0.7 million and $0.7 million, respectively, of lease security deposits available in cash, which are included in restricted cash on the accompanying Consolidated Balance Sheets. These funds may be used to settle tenant accounts receivables in the event of a default under the related lease. As of March 31, 2018 and December 31, 2017, the Company's total liability associated with these lease security deposits was approximately $8.4 million and $8.1 million, respectively, and is included in tenant prepaid rent and security deposits on the accompanying Consolidated Balance Sheets.

Related Parties

As of March 31, 2018 and December 31, 2017, the Company had approximately $4,000 and $0, respectively, of amounts due from related parties, which are included in prepaid expenses and other assets on the accompanying Consolidated Balance Sheets.

Revenue Recognition

Tenant Recoveries

The Company estimates that real estate taxes, which are the responsibility of certain tenants under the terms of their leases and are not reflected on the Company's consolidated financial statements, were approximately $3.1 million and $3.1 million for the three months ended March 31, 2018 and 2017, respectively. These amounts would have been the maximum real estate tax expense of the Company, excluding any penalties or interest, had the tenants not met their contractual obligations for these periods.

Termination Income

Approximately $0.1 million and $39,000 of termination fee income related to the Buena Vista, VA property, the tenant at which exercised its early lease termination option on March 27, 2017, is included in rental income on the accompanying Consolidated Statements of Operations for the three months ended March 31, 2018 and 2017, respectively.

Gain on the Sales of Rental Property, net

The timing of the derecognition of a rental property and the corresponding recognition of gain on the sales of rental property, net is measured by various criteria related to the terms of the sale transaction, and if the Company has lost control of the property and the acquirer has gained control of the property after the transaction. If the derecognition criteria is met, the full gain is recognized.

Taxes

Federal Income Taxes

The Company's taxable REIT subsidiaries recognized a net loss of approximately $36,000 and $31,000 for the three months ended March 31, 2018 and 2017, respectively, which has been included on the accompanying Consolidated Statements of Operations.

State and Local Income, Excise, and Franchise Tax

State and local income, excise, and franchise taxes in the amount of $0.2 million and $0.2 million have been recorded in other expenses on the accompanying Consolidated Statements of Operations for the three months ended March 31, 2018 and 2017, respectively.

Uncertain Tax Positions

As of March 31, 2018 and December 31, 2017, there were no liabilities for uncertain tax positions.

Concentrations of Credit Risk

Management believes the current credit risk portfolio is reasonably well diversified and does not contain any unusual concentration of credit risk.

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Rental Property

3 Months Ended

Mar. 31, 2018

Real Estate [Abstract]

Rental Property

Rental Property

The following table summarizes the components of rental property as of March 31, 2018 and December 31, 2017.

Rental Property (in thousands)	March 31, 2018		December 31, 2017
Land	$	324,734	$	321,560
Buildings, net of accumulated depreciation of $171,058 and $160,281, respectively	1,784,897		1,756,579
Tenant improvements, net of accumulated depreciation of $33,669 and $32,714, respectively	29,648		30,138
Building and land improvements, net of accumulated depreciation of $61,431 and $56,062, respectively	141,936		143,170
Construction in progress	1,951		2,877
Deferred leasing intangibles, net of accumulated amortization of $215,597 and $280,642, respectively	305,188		313,253
Total rental property, net	$	2,588,354	$	2,567,577

Acquisitions

The following table summarizes the acquisitions of the Company during the three months ended March 31, 2018.

Location	Square Feet	Buildings	Purchase Price (in thousands)
Fountain Inn, SC	203,000	1	$	10,755
Bloomington, MN	145,351	1	13,538
York, PA	278,582	1	18,277
Houston, TX	242,225	2	22,478
Greer, SC	222,710	1	13,773
Three months ended March 31, 2018	1,091,868	6	$	78,821

The following table summarizes the allocation of the consideration paid at the date of acquisition during the three months ended March 31, 2018 for the acquired assets and liabilities in connection with the acquisitions identified in the table above.

Acquired Assets and Liabilities	Purchase Price (in thousands)			Weighted Average Amortization Period (years) of Intangibles at Acquisition
Land	$	6,415		N/A
Buildings	57,248			N/A
Tenant improvements	996			N/A
Building and land improvements	2,418			N/A
Deferred leasing intangibles - In-place leases	8,122			6.3
Deferred leasing intangibles - Tenant relationships	3,712			10.5
Deferred leasing intangibles - Above market leases	583			5.8
Deferred leasing intangibles - Below market leases	(673		)	9.7
Total purchase price	$	78,821

The table below sets forth the results of operations for the three months ended March 31, 2018 for the buildings acquired during the three months ended March 31, 2018 included in the Company’s Consolidated Statements of Operations from the date of acquisition.

Results of Operations (in thousands)	Three months ended March 31, 2018
Total revenue	$	924
Net loss	$	104

Dispositions

During the three months ended March 31, 2018, the Company sold two buildings comprised of approximately 0.7 million square feet with a net book value of approximately $26.9 million to third parties. These buildings contributed approximately $0.3 million and $0.9 million to revenue for the three months ended March 31, 2018 and 2017, respectively. These buildings contributed approximately $49,000 and $46,000 to net income (exclusive of loss on involuntary conversion and gain on the sales of rental property, net) for the three months ended March 31, 2018 and 2017, respectively. Net proceeds from the sales of rental property were approximately $49.6 million and the Company recognized the full gain on the sales of rental property, net of approximately $22.7 million for the three months ended March 31, 2018.

Assets Held for Sale

As of March 31, 2018, the related land, building and improvements, net, and deferred leasing intangibles, net, of approximately $2.0 million, $10.7 million, and $0.8 million, respectively, for two buildings were classified as assets held for sale, net on the accompanying Consolidated Balance Sheets. These buildings contributed approximately $0.2 million and $0.5 million to revenue for the three months ended March 31, 2018 and 2017, respectively. These buildings contributed a net loss of approximately $0.8 million and $29,000 to net income for the three months ended March 31, 2018 and 2017, respectively.

Loss on Impairments

The following table summarizes the Company's loss on impairments for assets held and used during the three months ended March 31, 2018.

Property Location	Buildings	Event or Change in Circumstance Leading to Impairment Evaluation(1)		Valuation technique utilized to estimate fair value	Fair Value(2)		Loss on Impairments
					(in thousands)
Buena Vista, VA	1	Change in estimated hold period	(3)	Discounted cash flows
Sergeant Bluff, IA	1	Change in estimated hold period	(3)	Discounted cash flows
Three months ended March 31, 2018					$	3,176	$	2,934

(1) The Company tested the asset group for impairment utilizing a probability weighted recovery analysis of certain scenarios, and it was determined that the carrying value of the property and intangibles were not recoverable from the estimated future undiscounted cash flows.

(2) The estimated fair value of the property is based on Level 3 inputs and is a non-recurring fair value measurement. Level 3 is defined as unobservable inputs in which little or no market data exists, therefore requiring an entity to develop its own assumptions.

(3) Level 3 inputs used to determine fair value for the properties impaired for the three months ended March 31, 2018: discount rates ranged from 11.0% to 14.5% and exit capitalization rates ranged from 11.0% to 13.0%.

Deferred Leasing Intangibles

The following table sets forth the deferred leasing intangibles on the accompanying Consolidated Balance Sheets as of March 31, 2018 and December 31, 2017.

	March 31, 2018							December 31, 2017
Deferred Leasing Intangibles (in thousands)	Gross		Accumulated Amortization			Net		Gross		Accumulated Amortization			Net
Above market leases	$	70,675	$	(30,725	)	$	39,950	$	78,558	$	(36,810	)	$	41,748
Other intangible lease assets	450,110		(184,872		)	265,238		515,337		(243,832		)	271,505
Total deferred leasing intangible assets	$	520,785	$	(215,597	)	$	305,188	$	593,895	$	(280,642	)	$	313,253
Below market leases	$	32,041	$	(11,321	)	$	20,720	$	34,776	$	(13,555	)	$	21,221
Total deferred leasing intangible liabilities	$	32,041	$	(11,321	)	$	20,720	$	34,776	$	(13,555	)	$	21,221

The following table sets forth the amortization expense and the net decrease to rental income for the amortization of deferred leasing intangibles during the three months ended March 31, 2018 and 2017.

	Three months ended March 31,
Deferred Leasing Intangibles Amortization (in thousands)	2018		2017
Net decrease to rental income related to above and below market lease amortization	$	1,207	$	1,296
Amortization expense related to other intangible lease assets	$	18,100	$	18,393

The following table sets forth the amortization of deferred leasing intangibles over the next five calendar years beginning with 2018 as of March 31, 2018.

Year	Amortization Expense Related to Other Intangible Lease Assets (in thousands)		Net Decrease to Rental Income Related to Above and Below Market Lease Amortization (in thousands)
Remainder of 2018	$	48,805	$	2,987
2019	$	50,905	$	3,846
2020	$	40,954	$	3,504
2021	$	30,242	$	2,178
2022	$	23,113	$	1,210

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Debt

3 Months Ended

Mar. 31, 2018

Debt Disclosure [Abstract]

Debt

Debt

The following table sets forth a summary of the Company’s outstanding indebtedness, including borrowings under the Company’s unsecured credit facility, unsecured term loans, unsecured notes, and mortgage notes as of March 31, 2018 and December 31, 2017.

Loan	Principal Outstanding as of March 31, 2018 (in thousands)			Principal Outstanding as of December 31, 2017 (in thousands)			Interest  Rate (1)		Maturity Date	Prepayment Terms (2)
Unsecured credit facility:
Unsecured Credit Facility (3)	$	218,000		$	271,000		L + 1.15%		Dec-18-2019	i
Total unsecured credit facility	218,000			271,000
Unsecured term loans:
Unsecured Term Loan C	150,000			150,000			L + 1.30%		Sep-29-2020	i
Unsecured Term Loan B	150,000			150,000			L + 1.30%		Mar-21-2021	i
Unsecured Term Loan A	150,000			150,000			L + 1.30%		Mar-31-2022	i
Unsecured Term Loan D (4)	75,000			—			L + 1.30%		Jan-04-2023	i
Total unsecured term loans	525,000			450,000
Less: Total unamortized deferred financing fees and debt issuance costs	(3,494		)	(3,735		)
Total carrying value unsecured term loans, net	521,506			446,265
Unsecured notes:
Series F Unsecured Notes	100,000			100,000			3.98	%	Jan-05-2023	ii
Series A Unsecured Notes	50,000			50,000			4.98	%	Oct-1-2024	ii
Series D Unsecured Notes	100,000			100,000			4.32	%	Feb-20-2025	ii
Series B Unsecured Notes	50,000			50,000			4.98	%	Jul-1-2026	ii
Series C Unsecured Notes	80,000			80,000			4.42	%	Dec-30-2026	ii
Series E Unsecured Notes	20,000			20,000			4.42	%	Feb-20-2027	ii
Total unsecured notes	400,000			400,000
Less: Total unamortized deferred financing fees and debt issuance costs	(1,774		)	(1,766		)
Total carrying value unsecured notes, net	398,226			398,234
Mortgage notes (secured debt):
Wells Fargo Bank, National Association CMBS Loan	54,515			54,949			4.31	%	Dec-1-2022	iii
Thrivent Financial for Lutherans	3,879			3,906			4.78	%	Dec-15-2023	iv
Total mortgage notes	58,394			58,855
Total unamortized fair market value premiums	58			61
Less: Total unamortized deferred financing fees and debt issuance costs	(601		)	(634		)
Total carrying value mortgage notes, net	57,851			58,282
Total / weighted average interest rate (5)	$	1,195,583		$	1,173,781		3.56	%

(1) Interest rate as of March 31, 2018. At March 31, 2018, the one-month LIBOR (“L”) was 1.88313%. The interest rate is not adjusted to include the amortization of deferred financing fees or debt issuance costs incurred in obtaining debt or any unamortized fair market value premiums. The spread over the applicable rate for the Company's unsecured credit facility and unsecured term loans is based on the Company's consolidated leverage ratio, as defined in the respective loan agreements.

(2) Prepayment terms consist of (i) pre-payable with no penalty; (ii) pre-payable with penalty; (iii) pre-payable without penalty three months prior to the maturity date, however can be defeased beginning January 1, 2016; and (iv) pre-payable without penalty three months prior to the maturity date.

(3) The capacity of the unsecured credit facility is $450.0 million. Deferred financing fees and debt issuance costs, net of accumulated amortization related to the unsecured credit facility of approximately $1.3 million and $1.5 million is included in prepaid expenses and other assets on the accompanying Consolidated Balance Sheets as of March 31, 2018 and December 31, 2017, respectively.

(4) The remaining capacity is $75.0 million, which the Company has until July 27, 2018 to draw.

(5) The weighted average interest rate was calculated using the fixed interest rate swapped on the notional amount of $600.0 million of debt that was in effect as of March 31, 2018, and is not adjusted to include the amortization of deferred financing fees or debt issuance costs incurred in obtaining debt or any unamortized fair market value premiums.

The aggregate undrawn nominal commitment on the unsecured credit facility and unsecured term loans as of March 31, 2018 was approximately $301.1 million, including issued letters of credit. The Company's actual borrowing capacity at any given point in time may be less and is restricted to a maximum amount based on the Company's debt covenant compliance. Total accrued interest for the Company's indebtedness was approximately $5.4 million and $5.6 million as of March 31, 2018 and December 31, 2017, respectively, and is included in accounts payable, accrued expenses and other liabilities on the accompanying Consolidated Balance Sheets.

The table below sets forth the costs included in interest expense related to the Company's debt arrangements on the accompanying Consolidated Statement of Operations for the three months ended March 31, 2018 and 2017.

	Three months ended March 31,
Costs Included in Interest Expense (in thousands)	2018		2017
Amortization of deferred financing fees and debt issuance costs and fair market value premiums	$	534	$	501
Facility fees and unused fees	$	339	$	275

On March 28, 2018, the Company drew $75.0 million of the $150.0 million unsecured term loan that was entered into on July 28, 2017.

Financial Covenant Considerations

The Company was in compliance with all financial and other covenants as of March 31, 2018 and December 31, 2017 related to its unsecured credit facility, unsecured term loans, unsecured notes, and mortgage notes. The real estate net book value of the properties that are collateral for the Company’s debt arrangements was approximately $89.8 million and $90.9 million at March 31, 2018 and December 31, 2017, respectively, and is limited to senior, property-level secured debt financing arrangements.

Fair Value of Debt

The following table presents the aggregate principal outstanding under the Company’s debt arrangements and the corresponding estimate of fair value as of March 31, 2018 and December 31, 2017 (in thousands).

	March 31, 2018					December 31, 2017
	Principal Outstanding			Fair Value		Principal Outstanding			Fair Value
Unsecured credit facility	$	218,000		$	218,371	$	271,000		$	271,528
Unsecured term loans	525,000			526,685		450,000			451,463
Unsecured notes	400,000			410,058		400,000			415,599
Mortgage notes	58,394			58,611		58,855			59,769
Total principal amount	1,201,394			$	1,213,725	1,179,855			$	1,198,359
Add: Total unamortized fair market value premiums	58					61
Less: Total unamortized deferred financing fees and debt issuance costs	(5,869		)			(6,135		)
Total carrying value	$	1,195,583				$	1,173,781

The applicable fair value guidance establishes a three tier value hierarchy, which prioritizes the inputs used in measuring fair value. These tiers include: Level 1, defined as observable inputs such as quoted prices in active markets; Level 2, defined as inputs other than quoted prices in active markets that are either directly or indirectly observable; and Level 3, defined as unobservable inputs in which little or no market data exists, therefore requiring an entity to develop its own assumptions. The fair value of the Company’s debt is based on Level 3 inputs.

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Use of Derivative Financial Instruments

3 Months Ended

Mar. 31, 2018

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Use of Derivative Financial Instruments

Use of Derivative Financial Instruments

Risk Management Objective of Using Derivatives

The Company’s use of derivative instruments is limited to the utilization of interest rate swaps to manage interest rate risk exposure on existing and future liabilities and not for speculative purposes. The principal objective of such arrangements is to minimize the risks and related costs associated with the Company’s operating and financial structure.

The following table details the Company’s outstanding interest rate swaps as of March 31, 2018. All of the Company's interest rate swaps are designated as qualifying cash flow hedges.

Interest Rate Derivative Counterparty	Trade Date	Effective Date	Notional Amount (in thousands)		Fair Value (in thousands)		Pay Fixed Interest Rate		Receive Variable Interest Rate	Maturity Date
Regions Bank	Mar-01-2013	Mar-01-2013	$	25,000	$	461	1.3300	%	One-month L	Feb-14-2020
Capital One, N.A.	Jun-13-2013	Jul-01-2013	$	50,000	$	595	1.6810	%	One-month L	Feb-14-2020
Capital One, N.A.	Jun-13-2013	Aug-01-2013	$	25,000	$	287	1.7030	%	One-month L	Feb-14-2020
Regions Bank	Sep-30-2013	Feb-03-2014	$	25,000	$	153	1.9925	%	One-month L	Feb-14-2020
The Toronto-Dominion Bank	Oct-14-2015	Sep-29-2016	$	25,000	$	622	1.3830	%	One-month L	Sep-29-2020
PNC Bank, N.A.	Oct-14-2015	Sep-29-2016	$	50,000	$	1,237	1.3906	%	One-month L	Sep-29-2020
Regions Bank	Oct-14-2015	Sep-29-2016	$	35,000	$	870	1.3858	%	One-month L	Sep-29-2020
U.S. Bank, N.A.	Oct-14-2015	Sep-29-2016	$	25,000	$	618	1.3950	%	One-month L	Sep-29-2020
Capital One, N.A.	Oct-14-2015	Sep-29-2016	$	15,000	$	370	1.3950	%	One-month L	Sep-29-2020
Royal Bank of Canada	Jan-08-2015	Mar-20-2015	$	25,000	$	529	1.7090	%	One-month L	Mar-21-2021
The Toronto-Dominion Bank	Jan-08-2015	Mar-20-2015	$	25,000	$	526	1.7105	%	One-month L	Mar-21-2021
The Toronto-Dominion Bank	Jan-08-2015	Sep-10-2017	$	100,000	$	615	2.2255	%	One-month L	Mar-21-2021
Wells Fargo, N.A.	Jan-08-2015	Mar-20-2015	$	25,000	$	646	1.8280	%	One-month L	Mar-31-2022
The Toronto-Dominion Bank	Jan-08-2015	Feb-14-2020	$	25,000	$	105	2.4535	%	One-month L	Mar-31-2022
Regions Bank	Jan-08-2015	Feb-14-2020	$	50,000	$	188	2.4750	%	One-month L	Mar-31-2022
Capital One, N.A.	Jan-08-2015	Feb-14-2020	$	50,000	$	135	2.5300	%	One-month L	Mar-31-2022
The Toronto-Dominion Bank	Jul-20-2017	Oct-30-2017	$	25,000	$	768	1.8485	%	One-month L	Jan-04-2023
Royal Bank of Canada	Jul-20-2017	Oct-30-2017	$	25,000	$	770	1.8505	%	One-month L	Jan-04-2023
Wells Fargo, N.A.	Jul-20-2017	Oct-30-2017	$	25,000	$	770	1.8505	%	One-month L	Jan-04-2023
PNC Bank, N.A.	Jul-20-2017	Oct-30-2017	$	25,000	$	770	1.8485	%	One-month L	Jan-04-2023
PNC Bank, N.A.	Jul-20-2017	Oct-30-2017	$	50,000	$	1,542	1.8475	%	One-month L	Jan-04-2023

The fair value of the interest rate swaps outstanding as of March 31, 2018 and December 31, 2017 was as follows.

Balance Sheet Line Item (in thousands)	Notional Amount March 31, 2018		Fair Value March 31, 2018		Notional Amount December 31, 2017		Fair Value December 31, 2017
Interest rate swaps-Asset	$	725,000	$	12,577	$	475,000	$	6,079
Interest rate swaps-Liability	$	—	$	—	$	250,000	$	(1,217	)

Cash Flow Hedges of Interest Rate Risk

The Company’s objectives in using interest rate swaps are to add stability to interest expense and to manage its exposure to interest rate movements. 

For derivatives designated and that qualify as cash flow hedges of interest rate risk, the gain or loss on the derivative is recorded in accumulated other comprehensive income and subsequently reclassified into interest expense in the same periods during which the hedged transaction affects earnings.

Amounts reported in accumulated other comprehensive income related to derivatives designated as qualifying cash flow hedges will be reclassified to interest expense as interest payments are made on the Company's variable rate debt. The Company estimates that approximately $2.3 million will be reclassified from accumulated other comprehensive income as a decrease to interest expense over the next 12 months.

The table below presents the effect of cash flow hedge accounting and the location in the consolidated financial statements for the three months ended March 31, 2018 and 2017 (in thousands).

	Three months ended March 31,
	2018		2017
Income recognized in accumulated other comprehensive income on interest rate swaps	$	7,493	$	514
Loss reclassified from accumulated other comprehensive income into income (loss) as interest expense	$	230	$	698
Total interest expense presented in the Consolidated Statements of Operations in which the effects of cash flow hedges are recorded	$	11,386	$	10,472

Credit-risk-related Contingent Features

The Company has agreements with each of its derivative counterparties that contain a provision where the Company could be declared in default on its derivative obligations if repayment of the underlying indebtedness is accelerated by the lender due to the Company's default on the indebtedness.

As of March 31, 2018, the Company had no derivatives that were in a net liability position by counterparty.

Fair Value of Interest Rate Swaps

The Company’s valuation of the interest rate swaps is determined using widely accepted valuation techniques including discounted cash flow analysis on the expected cash flows of each derivative. This analysis reflects the contractual terms of the derivatives, including the period to maturity, and uses observable market-based inputs including interest rate curves.

The Company incorporates credit valuation adjustments to appropriately reflect both its own nonperformance risk and the respective counterparty’s nonperformance risk in the fair value measurements. In adjusting the fair value of its derivative contracts for the effect of nonperformance risk, the Company has considered the impact of netting and any applicable credit enhancements, such as collateral postings, thresholds, mutual puts, and guarantees.

Although the Company has determined that the majority of the inputs used to value its derivatives fall within Level 2 of the fair value hierarchy, the credit valuation adjustments associated with its derivatives utilize Level 3 inputs, such as estimates of current credit spreads to evaluate the likelihood of default by itself and its counterparties. However, as of March 31, 2018 and December 31, 2017, the Company has assessed the significance of the impact of the credit valuation adjustments on the overall valuation of its derivative positions and has determined that the credit valuation adjustments are not significant to the overall valuation of its derivatives. As a result, the Company has determined that its derivative valuations in their entirety are classified in Level 2 of the fair value hierarchy.

The following sets forth the Company’s financial instruments that are accounted for at fair value on a recurring basis as of March 31, 2018 and December 31, 2017. 

			Fair Value Measurements as of March 31, 2018 Using
Balance Sheet Line Item (in thousands)	Fair Value March 31, 2018		Level 1		Level 2		Level 3
Interest rate swaps-Asset	$	12,577	$	—	$	12,577	$	—
Interest rate swaps-Liability	$	—	$	—	$	—	$	—

				Fair Value Measurements as of December 31, 2017 Using
Balance Sheet Line Item (in thousands)	Fair Value December 31, 2017			Level 1		Level 2			Level 3
Interest rate swaps-Asset	$	6,079		$	—	$	6,079		$	—
Interest rate swaps-Liability	$	(1,217	)	$	—	$	(1,217	)	$	—

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Equity

3 Months Ended

Mar. 31, 2018

Stockholders' Equity Note [Abstract]

Equity

Equity

Preferred Stock

The table below sets forth the Company’s outstanding preferred stock issuances as of March 31, 2018.

Preferred Stock Issuances	Issuance Date	Number of Shares	Liquidation Value Per Share		Interest Rate
6.625% Series B Cumulative Redeemable Preferred Stock (“Series B Preferred Stock”)	April 16, 2013	2,800,000	$	25.00	6.625	%
6.875% Series C Cumulative Redeemable Preferred Stock (“Series C Preferred Stock”)	March 17, 2016	3,000,000	$	25.00	6.875	%

The tables below set forth the dividends attributable to the Company's outstanding preferred stock issuances during the three months ended March 31, 2018 and the year ended December 31, 2017.

Quarter Ended 2018	Declaration Date	Series B Preferred Stock Per Share		Series C Preferred Stock Per Share		Payment Date
March 31	February 14, 2018	0.4140625		0.4296875		April 2, 2018
Total		$	0.4140625	$	0.4296875

Quarter Ended 2017	Declaration Date	Series B Preferred Stock Per Share		Series C Preferred Stock Per Share		Payment Date
December 31	November 2, 2017	$	0.4140625	$	0.4296875	December 29, 2017
September 30	July 31, 2017	0.4140625		0.4296875		September 29, 2017
June 30	May 1, 2017	0.4140625		0.4296875		June 30, 2017
March 31	February 15, 2017	0.4140625		0.4296875		March 31, 2017
Total		$	1.6562500	$	1.7187500

On April 10, 2018, the Company’s board of directors declared the Series B Preferred Stock and Series C Preferred Stock dividends for the quarter ending June 30, 2018 at a quarterly rate of $0.4140625 per share and $0.4296875 per share, respectively.

Common Stock

The following table sets forth the terms of the Company’s at-the market (“ATM”) common stock offering program as of March 31, 2018.

ATM Common Stock Offering Program	Date	Maximum Aggregate Offering Price (in thousands)		Aggregate Common Stock Available as of March 31, 2018 (in thousands)
2017 $500 million ATM	November 13, 2017	$	500,000	$	489,674

The table below set forth the activity under the ATM common stock offering programs during the year ended December 31, 2017 (in thousands, except share data). There was no activity under the ATM common stock offering programs during three months ended March 31, 2018.

	Year ended December 31, 2017
ATM Common Stock Offering Program	Shares Sold	Weighted Average Price Per Share		Gross Proceeds		Sales Agents’ Fee		Net Proceeds
2017 $500 million ATM	363,843	$	28.38	$	10,326	$	129	$	10,197
2017 $300 million ATM(1)	11,098,748	$	27.03	300,000		3,637		296,363
2016 $228 million ATM(1)	4,799,784	$	24.42	117,216		1,604		115,612
Total/weighted average	16,262,375	$	26.29	$	427,542	$	5,370	$	422,172

(1) These programs ended before December 31, 2017.

Dividends

The table below sets forth the dividends attributable to the Company's outstanding shares of common stock that were declared during the three months ended March 31, 2018 and the year ended December 31, 2017.

Month Ended 2018	Declaration Date	Record Date	Per Share		Payment Date
March 31	November 2, 2017	March 29, 2018	0.118333		April 16, 2018
February 28	November 2, 2017	February 28, 2018	0.118333		March 15, 2018
January 31	November 2, 2017	January 31, 2018	0.118333		February 15, 2018
Total			$	0.354999

Month Ended 2017	Declaration Date	Record Date	Per Share		Payment Date
December 31	July 31, 2017	December 29, 2017	$	0.117500	January 16, 2018
November 30	July 31, 2017	November 30, 2017	0.117500		December 15, 2017
October 31	July 31, 2017	October 31, 2017	0.117500		November 15, 2017
September 30	May 1, 2017	September 29, 2017	0.117500		October 16, 2017
August 31	May 1, 2017	August 31, 2017	0.117500		September 15, 2017
July 31	May 1, 2017	July 31, 2017	0.117500		August 15, 2017
June 30	February 15, 2017	June 30, 2017	0.116667		July 17, 2017
May 31	February 15, 2017	May 31, 2017	0.116667		June 15, 2017
April 30	February 15, 2017	April 28, 2017	0.116667		May 15, 2017
March 31	November 2, 2016	March 31, 2017	0.116667		April 17, 2017
February 28	November 2, 2016	February 28, 2017	0.116667		March 15, 2017
January 31	November 2, 2016	January 31, 2017	0.116667		February 15, 2017
Total			$	1.405002

On April 10, 2018, the Company’s board of directors declared the common stock dividends for the months ending April 30, 2018, May 31, 2018 and June 30, 2018 at a monthly rate of $0.118333 per share of common stock.

Restricted Stock-Based Compensation

Restricted shares of common stock granted on January 5, 2018 to certain employees of the Company, subject to the recipient’s continued employment, will vest in four equal installments on January 1 of each year beginning in 2019. The following table summarizes activity related to the Company’s unvested restricted shares of common stock for the three months ended March 31, 2018 and the year ended December 31, 2017.

Unvested Restricted Shares of Common Stock	Shares
Balance at December 31, 2016	272,337
Granted	75,001		(1)
Vested	(109,209	)	(2)
Forfeited	(922	)
Balance at December 31, 2017	237,207
Granted	76,659		(1)
Vested	(112,405	)	(2)
Forfeited	(5,090	)
Balance at March 31, 2018	196,371

(1) The fair value per share on the grant date of January 5, 2018 and January 6, 2017 was $26.40 and $24.41, respectively.

(2) The Company repurchased and retired 41,975 and 40,836 restricted shares of common stock that vested during the three months ended March 31, 2018 and the year ended December 31, 2017, respectively.

The unrecognized compensation expense associated with the Company’s restricted shares of common stock at March 31, 2018 was approximately $4.1 million and is expected to be recognized over a weighted average period of approximately 2.9 years.

The following table summarizes the fair value at vesting for the restricted shares of common stock that vested during the three months ended March 31, 2018 and 2017. 

	Three months ended March 31,
	2018		2017
Vested restricted shares of common stock	112,405		109,209
Fair value of vested restricted shares of common stock (in thousands)	$	3,002	$	2,591

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Noncontrolling Interest

3 Months Ended

Mar. 31, 2018

Noncontrolling Interest [Abstract]

Noncontrolling Interest

Noncontrolling Interest

The table below summarizes the activity for noncontrolling interest in the Company for the three months ended March 31, 2018 and the year ended December 31, 2017.

	LTIP Units		Other Common Units		Total Noncontrolling Common Units		Noncontrolling Interest
Balance at December 31, 2016	1,576,516		2,057,365		3,633,881		4.3	%
Granted/Issued	126,239		687,827		814,066		N/A
Forfeited	—		—		—		N/A
Conversions from LTIP units to Other Common Units	(245,685	)	245,685		—		N/A
Redemptions from Other Common Units to common stock	—		(351,260	)	(351,260	)	N/A
Balance at December 31, 2017	1,457,070		2,639,617		4,096,687		4.1	%
Granted/Issued	324,802		—		324,802		N/A
Forfeited	—		—		—		N/A
Conversions from LTIP units to Other Common Units	(145,672	)	145,672		—		N/A
Redemptions from Other Common Units to common stock	—		(145,672	)	(145,672	)	N/A
Balance at March 31, 2018	1,636,200		2,639,617		4,275,817		4.2	%

LTIP Units

On March 12, 2018, the Company's board of directors appointed Michelle Dilley to serve as director of the Company and serve as a member of the nominating and corporate governance committee of the board of directors, effective on March 12, 2018. On March 12, 2018, Ms. Dilley was granted 3,930 LTIP units which, subject to Ms. Dilley's continued service, will vest on January 1, 2019.

LTIP units granted on January 5, 2018 to non-employee, independent directors, subject to the recipient’s continued service, will vest on January 1, 2019. LTIP units granted on January 5, 2018 to certain senior executive officers and senior employees, subject to the recipient’s continued employment, will vest quarterly over four years, with the first vesting date having been March 31, 2018. Refer to Note 8 for a discussion of vested LTIP units granted on January 5, 2018 pursuant to the 2015 Outperformance Program (the “2015 OPP”).

The fair value of the LTIP units at the date of grant was determined by a lattice-binomial option-pricing model based on a Monte Carlo simulation. The fair value of the LTIP units are based on Level 3 inputs and are non-recurring fair value measurements. The table below sets forth the assumptions used in valuing such LTIP units granted during the three months ended March 31, 2018 (excluding those vested LTIP units granted pursuant to the 2015 OPP; refer to Note 8 for details).

LTIP Units	Assumptions
Grant date	March 12, 2018			January 5, 2018
Expected term (years)	10			10
Expected volatility	22.0		%	22.0		%
Expected dividend yield	6.0		%	6.0		%
Risk-free interest rate	2.46		%	2.09		%
Fair value of LTIP units at issuance (in thousands)	$	90		$	3,447
LTIP units at issuance	3,930			137,616
Fair value unit price per LTIP unit at issuance	$	22.90		$	25.05

The following table summarizes activity related to the Company’s unvested LTIP units for the three months ended March 31, 2018 and the year ended December 31, 2017.

Unvested LTIP Units	LTIP Units
Balance at December 31, 2016	403,423
Granted	126,239
Vested	(229,355	)
Forfeited	—
Balance at December 31, 2017	300,307
Granted	324,802
Vested	(231,041	)
Forfeited	—
Balance at March 31, 2018	394,068

The unrecognized compensation expense associated with the Company’s LTIP units at March 31, 2018 was approximately $7.5 million and is expected to be recognized over a weighted average period of approximately 2.8 years.

The following table summarizes the fair value at vesting for the LTIP units that vested during the three months ended March 31, 2018 and 2017.

	Three months ended March 31,
	2018		2017
Vested LTIP units	231,041		67,670
Fair value of vested LTIP units (in thousands)	$	6,035	$	1,664

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Equity Incentive Plan

3 Months Ended

Mar. 31, 2018

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Equity Incentive Plan

Equity Incentive Plan

On January 5, 2018, the Company granted performance units approved by the compensation committee of the board of directors, under the 2011 Plan to certain key employees of the Company. The terms of the performance units granted on January 5, 2018 are substantially the same as the terms of the performance units granted on January 6, 2017 and March 8, 2016, except that the measuring period commences on January 1, 2018 and ends on December 31, 2020.

The fair value of the performance units at the date of grant was determined by a lattice-binomial option-pricing model based on a Monte Carlo simulation. The fair value of the performance units are based on Level 3 inputs and are non-recurring fair value measurements. The performance unit equity compensation expense is recognized into earnings ratably from the grant date over the respective vesting periods. The table below sets forth the assumptions used in valuing the performance units granted during the three months ended March 31, 2018.

Performance Units	Assumptions
Grant date	January 5, 2018
Expected volatility	22.0		%
Expected dividend yield	6.0		%
Risk-free interest rate	2.09		%
Fair value of performance units grant (in thousands)	$	5,456

On January 1, 2018, the Company’s three year measurement period pursuant to the 2015 OPP concluded. It was determined that the Company's total stockholder return exceeded the threshold percentage and return hurdle and a pool of approximately $6.2 million was awarded to the participants. The compensation committee of the board of directors approved the issuance of 183,256 vested LTIP units and 53,722 vested shares of common stock (of which 15,183 shares of common stock were repurchased and retired) to the participants, all of which were issued on January 5, 2018.

The unrecognized compensation expense associated with the Company's performance units at March 31, 2018 was approximately $7.8 million and is expected to be recognized over a weighted average period of approximately 2.7 years.

Non-cash Compensation Expense

The following table summarizes the amount recorded in general and administrative expenses in the accompanying Consolidated Statements of Operations for the amortization of restricted shares of common stock, LTIP units, performance units, the 2015 OPP (performance units and the 2015 OPP, collectively the “Performance-based Compensation Plans”), and the Company’s director compensation for the three months ended March 31, 2018 and 2017.

	Three months ended March 31,
Non-Cash Compensation Expense (in thousands)	2018		2017
Restricted shares of common stock	$	434	$	592
LTIP units	871		1,170
Performance-based Compensation Plans	829		537
Director compensation (1)	86		88
Total non-cash compensation expense	$	2,220	$	2,387

(1) All of the Company’s independent directors elected to receive shares of common stock in lieu of cash for their service during the three months ended March 31, 2018 and 2017. The number of shares of common stock granted is calculated based on the trailing 10 days average common stock price ending on the third business day preceding the grant date.

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Earnings Per Share

3 Months Ended

Mar. 31, 2018

Earnings Per Share [Abstract]

Earnings Per Share

Earnings Per Share

During the three months ended March 31, 2018 and 2017, there were 201,650 and 239,827, respectively, of unvested restricted shares of common stock on a weighted average basis that were considered participating securities.

The following table sets forth the computation of basic and diluted earnings per common share for the three months ended March 31, 2018 and 2017.

	Three months ended March 31,
Earnings Per Share (in thousands, except per share data)	2018		2017
Numerator
Net income	$	25,149	$	69
Less: preferred stock dividends	2,448		2,448
Less: amount allocated to participating securities	71		83
Less: income (loss) attributable to noncontrolling interest after preferred stock dividends	954		(103		)
Net income (loss) attributable to common stockholders	$	21,676	$	(2,359	)
Denominator
Weighted average common shares outstanding — basic	97,021		81,808
Effect of dilutive securities(1)
Share-based compensation	302		—
Weighted average common shares outstanding — diluted	97,323		81,808
Net income (loss) per share — basic and diluted
Net income (loss) per share attributable to common stockholders — basic	$	0.22	$	(0.03	)
Net income (loss) per share attributable to common stockholders — diluted	$	0.22	$	(0.03	)

(1) During the three months ended March 31, 2018 and 2017, there were approximately 202 and 240, respectively, unvested restricted shares of common stock, respectively, on a weighted average basis that were not included in the computation of diluted earnings per share because to do so would have been antidilutive for the period. During the three months ended March 31, 2017, there were approximately 438 unvested shares under the Performance-based Compensation Plans on a weighted average basis that were not included in the computation of diluted earnings per share because to do so would have been antidilutive for the period.

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Commitments and Contingencies

3 Months Ended

Mar. 31, 2018

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

Commitments and Contingencies

The Company is subject to various legal proceedings and claims that arise in the ordinary course of business. These matters are generally covered by insurance subject to deductible requirements. Management believes that the ultimate settlement of these actions will not have a material adverse effect on the Company’s financial position, results of operations, or cash flows.

The Company has letters of credit of approximately $5.9 million as of March 31, 2018 related to construction projects and certain other agreements.

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Subsequent Events

3 Months Ended

Mar. 31, 2018

Subsequent Events [Abstract]

Subsequent Events

Subsequent Events

The following non-recognized subsequent events were noted.

On April 10, 2018, the Company entered into a note purchase agreement for the future private placement by the Operating Partnership of $75.0 million senior unsecured notes maturing June 13, 2025 with a fixed annual interest rate of 4.10%, and $100.0 million senior unsecured notes maturing June 13, 2028 with a fixed annual interest rate of 4.27%.

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Summary of Significant Accounting Policies (Policies)

3 Months Ended

Mar. 31, 2018

Accounting Policies [Abstract]

Revenue Recognition, Real Estate Transactions, Policy [Policy Text Block]

Gain on the Sales of Rental Property, net

The timing of the derecognition of a rental property and the corresponding recognition of gain on the sales of rental property, net is measured by various criteria related to the terms of the sale transaction, and if the Company has lost control of the property and the acquirer has gained control of the property after the transaction. If the derecognition criteria is met, the full gain is recognized.

Quarterly Financial Information

Interim Financial Information

The accompanying interim financial statements have been presented in conformity with accounting principles generally accepted in the United States of America (“GAAP”) and with the instructions to Form 10-Q and Regulation S-X for interim financial information. Accordingly, these statements do not include all of the information and notes required by GAAP for complete financial statements. In the opinion of management, the accompanying interim financial statements include all adjustments, consisting of normal recurring items, necessary for their fair statement in conformity with GAAP. Interim results are not necessarily indicative of results for a full year. The year-end consolidated balance sheet data was derived from audited financial statements, but does not include all disclosures required by GAAP. The information included in this Quarterly Report on Form 10-Q should be read in conjunction with the Company’s consolidated financial statements and notes thereto contained in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2017.

Basis of Presentation

Basis of Presentation

The Company’s consolidated financial statements include the accounts of the Company, the Operating Partnership and their subsidiaries. Interests in the Operating Partnership not owned by the Company are referred to as “Noncontrolling Common Units.” These Noncontrolling Common Units are held by other limited partners in the form of common units (“Other Common Units”) and long term incentive plan units (“LTIP units”) issued pursuant to the STAG Industrial, Inc. 2011 Equity Incentive Plan, as amended (the “2011 Plan”). All significant intercompany balances and transactions have been eliminated in the consolidation of entities. The financial statements of the Company are presented on a consolidated basis for all periods presented.

Reclassification

Certain prior year amounts have been reclassified to conform to the current year presentation.

New Accounting Pronouncements

New Accounting Standards Adopted

In August 2017, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2017-12, Derivatives and Hedging (Topic 815):Targeted Improvements to Accounting for Hedging Activities. The purpose of this updated guidance is to better align a company’s financial reporting for hedging activities with the economic objectives of those activities. This standard is effective for fiscal years beginning after December 15, 2018 and interim periods within those years, with early adoption permitted, and the Company adopted this standard effective January 1, 2018 using the modified retrospective transition method. The adoption of this standard resulted in a cumulative effect adjustment of approximately $0.3 million recorded as an increase to common stock dividends in excess of earnings and an increase to accumulated other comprehensive income as of January 1, 2018 in the accompanying Consolidated Statements of Equity.

In May 2017, the FASB issued ASU 2017-09, Stock Compensation (Topic 718): Scope of Modification Accounting, which provides updated guidance about which changes to the terms or conditions of a share-based payment award would require an entity to apply modification accounting under the topic. This standard is effective for fiscal years beginning after December 15, 2017 and interim periods within those years, and the Company adopted this standard prospectively effective January 1, 2018. The adoption of this standard did not have a material effect on the Company's consolidated financial statements.

In February 2017, the FASB issued ASU 2017-05, Other Income - Gains and Losses from the Derecognition of Nonfinancial Assets (Subtopic 610-20): Clarifying the Scope of Asset Derecognition Guidance and Accounting for Partial Sales of Nonfinancial Assets, which provides guidance for recognizing gains and losses from the transfer of nonfinancial assets in contracts with non-customers. The new standard was issued as part of the new revenue standard (ASU 2014-09, as discussed below), and defines “in substance nonfinancial asset,” unifies guidance related to partial sales of nonfinancial assets, eliminates rules specifically addressing sales of real estate, removes exceptions to the financial asset derecognition model, and clarifies the accounting for contributions of nonfinancial assets to joint ventures. As a result of the new guidance, the guidance specific to real estate sales in Subtopic 360-20 was eliminated, and sales and partial sales of real estate assets will now be subject to the same derecognition model as all other nonfinancial assets. This standard is effective at the same time an entity adopts ASU 2014-09, which the Company adopted effective January 1, 2018. The Company adopted this standard effective January 1, 2018 using the modified retrospective approach. The adoption of this standard did not have a material effect on the Company's consolidated financial statements.

In January 2017, the FASB issued ASU 2017-01, Business Combinations (Topic 805): Clarifying the Definition of a Business. The new standard provides a screen to determine when a set of assets and activities is not a business. The screen requires that when substantially all of the fair value of the gross assets acquired or disposed of is concentrated in a single identifiable asset or a group of similar identifiable assets, the set is not a business. This standard is effective for annual periods beginning after December 15, 2017 and interim periods within those periods, and the Company adopted this standard prospectively effective January 1, 2018. As a result, it is expected that the majority of the Company's acquisitions will be accounted for as asset acquisitions, whereas under the former guidance the majority of the Company's acquisitions had been accounted for as business combinations. The most significant difference between the two accounting models that impacts the Company's consolidated financial statements is that in an asset acquisition, property acquisition costs are generally a component of the consideration transferred to acquire a group of assets and are capitalized as a component of the cost of the assets, whereas in a business combination, property acquisition costs are expensed and not included as part of the consideration transferred.

In November 2016, the FASB issued ASU 2016-18, Statement of Cash Flows (Topic 230): Restricted Cash.The new standard requires that the statement of cash flows explain the changes during the period in the total of cash, cash equivalents, and amounts generally described as restricted cash or restricted cash equivalents. This standard is effective for fiscal years beginning after December 15, 2017 and the Company adopted this standard effective January 1, 2018. As a result, the Company has included restricted cash with cash and cash equivalents when reconciling the beginning and end of period total amounts on the accompanying Consolidated Statements of Cash Flows. The effects of this standard were applied retrospectively to all prior periods presented. For the three months ended March 31, 2017, the effect of the change in accounting principle was an increase in cash provided by operating activities of approximately $0.3 million and an increase in cash used in investing activities of approximately $1.1 million on the accompanying Consolidated Statements of Cash Flows.

In January 2016, the FASB issued ASU 2016-01, Recognition and Measurement of Financial Assets and Financial Liabilities (Subtopic 825-10). The amendments in ASU 2016-01 address certain aspects of recognition, measurement, presentation, and disclosure of financial instruments. The standard primarily affects the accounting for equity investments, financial liabilities under the fair value option, and the presentation and disclosure requirements for financial instruments. ASU 2016-01 is effective for the annual periods beginning after December 31, 2017 and for annual periods and interim periods within those years, and the Company adopted this standard prospectively effective January 1, 2018. The adoption of this standard did not have a material effect on the Company's consolidated financial statements.

In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers(Topic 606). ASU 2014-09 is a comprehensive new revenue recognition model requiring a company to recognize revenue to depict the transfer of goods or services to a customer at an amount reflecting the consideration it expects to receive in exchange for those goods or services. While lease contracts with customers, which constitute a vast majority of the Company's revenues, are specifically excluded from the model's scope, certain of the Company's revenue streams may be impacted by the new guidance. Once the new guidance setting forth principles for the recognition, measurement, presentation and disclosure of leases (ASU 2016-02, as discussed below) goes into effect, the new revenue standard may apply to executory costs and other components of revenue due under leases that are deemed to be non-lease components (such as common area maintenance and provision of utilities), even when the revenue for such activities is not separately stipulated in the lease. In that case, revenue from these items previously recognized on a straight-line basis under current lease guidance would be recognized under the new revenue guidance as the related services are delivered. As a result, while the total revenue recognized over time would not differ under the new guidance, the recognition pattern may be different. The Company is in the process of evaluating the significance of the difference in the recognition pattern that would result from this change upon the adoption of ASU 2016-02 on January 1, 2019. Additionally, the new revenue guidance requires improved disclosures regarding the nature, amount, timing and uncertainty of revenue and cash flows arising from contracts with customers. The Company adopted this standard effective January 1, 2018 using the modified retrospective approach. The adoption of this standard did not have a material effect on the Company's consolidated financial statements.

New Accounting Standards Issued but not yet Adopted

In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842), which sets out the principles for the recognition, measurement, presentation and disclosure of leases for both parties to a contract (i.e. lessees and lessors). Topic 842 supersedes the previous leases standard, Topic 840, Leases. The new standard requires lessees to apply a dual approach, classifying leases as either finance or operating leases based on the principle of whether or not the lease is effectively a financed purchase by the lessee. This classification will determine whether lease expense is recognized based on an effective interest method or on a straight line basis over the term of the lease, respectively. A lessee is also required to record a right-of-use asset and a lease liability for all leases with a term of greater than 12 months regardless of their classification. Leases with a term of 12 months or less will be accounted for similar to existing guidance for operating leases today. The new standard requires lessors to account for leases using an approach that is substantially equivalent to existing guidance for sales-type leases, direct financing leases and operating leases. ASU 2016-02 is expected to impact the Company’s consolidated financial statements as the Company has certain operating and land lease arrangements for which it is the lessee, which will result in the recording of a right of use asset and the related lease liability. The standard is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years, with early adoption permitted. The new standard must be adopted using a modified retrospective transition and will require application of the new guidance at the beginning of the earliest comparative period. The Company is currently in the process of evaluating the impact the adoption of ASU 2016-02 will have on the Company’s financial position or results of operations, and plans to adopt this standard effective January 1, 2019.

Restricted cash and cash equivalents, policy

Restricted Cash

Restricted cash may include tenant security deposits and cash held in escrow for real estate taxes and capital improvements as required in various mortgage note agreements. Restricted cash also may include amounts held by the Company’s transfer agent for preferred stock dividends that are distributed subsequent to period end.

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Summary of Significant Accounting Policies - Cash, Cash Equivalents and Restricted Cash (Tables)

3 Months Ended

Mar. 31, 2018

Accounting Policies [Abstract]

Schedule of Cash, Cash Equivalents and Restricted Cash

The following table presents a reconciliation of cash and cash equivalents and restricted cash reported on the accompanying Consolidated Balance Sheets to amounts reported on the accompanying Consolidated Statements of Cash Flows (in thousands).

	As of March 31,
	2018		2017
Cash and cash equivalents	$	10,455	$	7,082
Restricted cash	7,259		8,720
Total cash and cash equivalents and restricted cash	$	17,714	$	15,802

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Rental Property (Tables)

3 Months Ended

Mar. 31, 2018

Real Estate [Abstract]

Schedule of components of rental property

The following table summarizes the components of rental property as of March 31, 2018 and December 31, 2017.

Rental Property (in thousands)	March 31, 2018		December 31, 2017
Land	$	324,734	$	321,560
Buildings, net of accumulated depreciation of $171,058 and $160,281, respectively	1,784,897		1,756,579
Tenant improvements, net of accumulated depreciation of $33,669 and $32,714, respectively	29,648		30,138
Building and land improvements, net of accumulated depreciation of $61,431 and $56,062, respectively	141,936		143,170
Construction in progress	1,951		2,877
Deferred leasing intangibles, net of accumulated amortization of $215,597 and $280,642, respectively	305,188		313,253
Total rental property, net	$	2,588,354	$	2,567,577

Schedule of real estate properties acquired

The following table summarizes the acquisitions of the Company during the three months ended March 31, 2018.

Location	Square Feet	Buildings	Purchase Price (in thousands)
Fountain Inn, SC	203,000	1	$	10,755
Bloomington, MN	145,351	1	13,538
York, PA	278,582	1	18,277
Houston, TX	242,225	2	22,478
Greer, SC	222,710	1	13,773
Three months ended March 31, 2018	1,091,868	6	$	78,821

Summary of allocation of the consideration paid for the acquired assets and liabilities in connection with the acquisition of buildings at the date of acquisition

The following table summarizes the allocation of the consideration paid at the date of acquisition during the three months ended March 31, 2018 for the acquired assets and liabilities in connection with the acquisitions identified in the table above.

Acquired Assets and Liabilities	Purchase Price (in thousands)			Weighted Average Amortization Period (years) of Intangibles at Acquisition
Land	$	6,415		N/A
Buildings	57,248			N/A
Tenant improvements	996			N/A
Building and land improvements	2,418			N/A
Deferred leasing intangibles - In-place leases	8,122			6.3
Deferred leasing intangibles - Tenant relationships	3,712			10.5
Deferred leasing intangibles - Above market leases	583			5.8
Deferred leasing intangibles - Below market leases	(673		)	9.7
Total purchase price	$	78,821

Schedule of pro forma information for acquired properties

The table below sets forth the results of operations for the three months ended March 31, 2018 for the buildings acquired during the three months ended March 31, 2018 included in the Company’s Consolidated Statements of Operations from the date of acquisition.

Results of Operations (in thousands)	Three months ended March 31, 2018
Total revenue	$	924
Net loss	$	104

Schedule of Finite-Lived Intangible Assets and Below Market Leases

The following table sets forth the deferred leasing intangibles on the accompanying Consolidated Balance Sheets as of March 31, 2018 and December 31, 2017.

	March 31, 2018							December 31, 2017
Deferred Leasing Intangibles (in thousands)	Gross		Accumulated Amortization			Net		Gross		Accumulated Amortization			Net
Above market leases	$	70,675	$	(30,725	)	$	39,950	$	78,558	$	(36,810	)	$	41,748
Other intangible lease assets	450,110		(184,872		)	265,238		515,337		(243,832		)	271,505
Total deferred leasing intangible assets	$	520,785	$	(215,597	)	$	305,188	$	593,895	$	(280,642	)	$	313,253
Below market leases	$	32,041	$	(11,321	)	$	20,720	$	34,776	$	(13,555	)	$	21,221
Total deferred leasing intangible liabilities	$	32,041	$	(11,321	)	$	20,720	$	34,776	$	(13,555	)	$	21,221

The following table sets forth the amortization expense and the net decrease to rental income for the amortization of deferred leasing intangibles during the three months ended March 31, 2018 and 2017.

	Three months ended March 31,
Deferred Leasing Intangibles Amortization (in thousands)	2018		2017
Net decrease to rental income related to above and below market lease amortization	$	1,207	$	1,296
Amortization expense related to other intangible lease assets	$	18,100	$	18,393

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense

The following table sets forth the amortization of deferred leasing intangibles over the next five calendar years beginning with 2018 as of March 31, 2018.

Year	Amortization Expense Related to Other Intangible Lease Assets (in thousands)		Net Decrease to Rental Income Related to Above and Below Market Lease Amortization (in thousands)
Remainder of 2018	$	48,805	$	2,987
2019	$	50,905	$	3,846
2020	$	40,954	$	3,504
2021	$	30,242	$	2,178
2022	$	23,113	$	1,210

Below Market Lease, Future Amortization Income

The following table sets forth the amortization of deferred leasing intangibles over the next five calendar years beginning with 2018 as of March 31, 2018.

Year	Amortization Expense Related to Other Intangible Lease Assets (in thousands)		Net Decrease to Rental Income Related to Above and Below Market Lease Amortization (in thousands)
Remainder of 2018	$	48,805	$	2,987
2019	$	50,905	$	3,846
2020	$	40,954	$	3,504
2021	$	30,242	$	2,178
2022	$	23,113	$	1,210

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Debt (Tables)

3 Months Ended

Mar. 31, 2018

Debt Disclosure [Abstract]

Summary of the mortgage notes payable, unsecured term loans and credit facility

The following table sets forth a summary of the Company’s outstanding indebtedness, including borrowings under the Company’s unsecured credit facility, unsecured term loans, unsecured notes, and mortgage notes as of March 31, 2018 and December 31, 2017.

Loan	Principal Outstanding as of March 31, 2018 (in thousands)			Principal Outstanding as of December 31, 2017 (in thousands)			Interest  Rate (1)		Maturity Date	Prepayment Terms (2)
Unsecured credit facility:
Unsecured Credit Facility (3)	$	218,000		$	271,000		L + 1.15%		Dec-18-2019	i
Total unsecured credit facility	218,000			271,000
Unsecured term loans:
Unsecured Term Loan C	150,000			150,000			L + 1.30%		Sep-29-2020	i
Unsecured Term Loan B	150,000			150,000			L + 1.30%		Mar-21-2021	i
Unsecured Term Loan A	150,000			150,000			L + 1.30%		Mar-31-2022	i
Unsecured Term Loan D (4)	75,000			—			L + 1.30%		Jan-04-2023	i
Total unsecured term loans	525,000			450,000
Less: Total unamortized deferred financing fees and debt issuance costs	(3,494		)	(3,735		)
Total carrying value unsecured term loans, net	521,506			446,265
Unsecured notes:
Series F Unsecured Notes	100,000			100,000			3.98	%	Jan-05-2023	ii
Series A Unsecured Notes	50,000			50,000			4.98	%	Oct-1-2024	ii
Series D Unsecured Notes	100,000			100,000			4.32	%	Feb-20-2025	ii
Series B Unsecured Notes	50,000			50,000			4.98	%	Jul-1-2026	ii
Series C Unsecured Notes	80,000			80,000			4.42	%	Dec-30-2026	ii
Series E Unsecured Notes	20,000			20,000			4.42	%	Feb-20-2027	ii
Total unsecured notes	400,000			400,000
Less: Total unamortized deferred financing fees and debt issuance costs	(1,774		)	(1,766		)
Total carrying value unsecured notes, net	398,226			398,234
Mortgage notes (secured debt):
Wells Fargo Bank, National Association CMBS Loan	54,515			54,949			4.31	%	Dec-1-2022	iii
Thrivent Financial for Lutherans	3,879			3,906			4.78	%	Dec-15-2023	iv
Total mortgage notes	58,394			58,855
Total unamortized fair market value premiums	58			61
Less: Total unamortized deferred financing fees and debt issuance costs	(601		)	(634		)
Total carrying value mortgage notes, net	57,851			58,282
Total / weighted average interest rate (5)	$	1,195,583		$	1,173,781		3.56	%

(1) Interest rate as of March 31, 2018. At March 31, 2018, the one-month LIBOR (“L”) was 1.88313%. The interest rate is not adjusted to include the amortization of deferred financing fees or debt issuance costs incurred in obtaining debt or any unamortized fair market value premiums. The spread over the applicable rate for the Company's unsecured credit facility and unsecured term loans is based on the Company's consolidated leverage ratio, as defined in the respective loan agreements.

(2) Prepayment terms consist of (i) pre-payable with no penalty; (ii) pre-payable with penalty; (iii) pre-payable without penalty three months prior to the maturity date, however can be defeased beginning January 1, 2016; and (iv) pre-payable without penalty three months prior to the maturity date.

(3) The capacity of the unsecured credit facility is $450.0 million. Deferred financing fees and debt issuance costs, net of accumulated amortization related to the unsecured credit facility of approximately $1.3 million and $1.5 million is included in prepaid expenses and other assets on the accompanying Consolidated Balance Sheets as of March 31, 2018 and December 31, 2017, respectively.

(4) The remaining capacity is $75.0 million, which the Company has until July 27, 2018 to draw.

(5) The weighted average interest rate was calculated using the fixed interest rate swapped on the notional amount of $600.0 million of debt that was in effect as of March 31, 2018, and is not adjusted to include the amortization of deferred financing fees or debt issuance costs incurred in obtaining debt or any unamortized fair market value premiums

Interest Income and Interest Expense Disclosure [Table Text Block]

The table below sets forth the costs included in interest expense related to the Company's debt arrangements on the accompanying Consolidated Statement of Operations for the three months ended March 31, 2018 and 2017.

	Three months ended March 31,
Costs Included in Interest Expense (in thousands)	2018		2017
Amortization of deferred financing fees and debt issuance costs and fair market value premiums	$	534	$	501
Facility fees and unused fees	$	339	$	275

Schedule of aggregate carrying value of the debt and the corresponding estimate of fair value

The following table presents the aggregate principal outstanding under the Company’s debt arrangements and the corresponding estimate of fair value as of March 31, 2018 and December 31, 2017 (in thousands).

	March 31, 2018					December 31, 2017
	Principal Outstanding			Fair Value		Principal Outstanding			Fair Value
Unsecured credit facility	$	218,000		$	218,371	$	271,000		$	271,528
Unsecured term loans	525,000			526,685		450,000			451,463
Unsecured notes	400,000			410,058		400,000			415,599
Mortgage notes	58,394			58,611		58,855			59,769
Total principal amount	1,201,394			$	1,213,725	1,179,855			$	1,198,359
Add: Total unamortized fair market value premiums	58					61
Less: Total unamortized deferred financing fees and debt issuance costs	(5,869		)			(6,135		)
Total carrying value	$	1,195,583				$	1,173,781

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Use of Derivative Financial Instruments (Tables)

3 Months Ended

Mar. 31, 2018

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of Derivative Instruments [Table Text Block]

The following table details the Company’s outstanding interest rate swaps as of March 31, 2018. All of the Company's interest rate swaps are designated as qualifying cash flow hedges.

Interest Rate Derivative Counterparty	Trade Date	Effective Date	Notional Amount (in thousands)		Fair Value (in thousands)		Pay Fixed Interest Rate		Receive Variable Interest Rate	Maturity Date
Regions Bank	Mar-01-2013	Mar-01-2013	$	25,000	$	461	1.3300	%	One-month L	Feb-14-2020
Capital One, N.A.	Jun-13-2013	Jul-01-2013	$	50,000	$	595	1.6810	%	One-month L	Feb-14-2020
Capital One, N.A.	Jun-13-2013	Aug-01-2013	$	25,000	$	287	1.7030	%	One-month L	Feb-14-2020
Regions Bank	Sep-30-2013	Feb-03-2014	$	25,000	$	153	1.9925	%	One-month L	Feb-14-2020
The Toronto-Dominion Bank	Oct-14-2015	Sep-29-2016	$	25,000	$	622	1.3830	%	One-month L	Sep-29-2020
PNC Bank, N.A.	Oct-14-2015	Sep-29-2016	$	50,000	$	1,237	1.3906	%	One-month L	Sep-29-2020
Regions Bank	Oct-14-2015	Sep-29-2016	$	35,000	$	870	1.3858	%	One-month L	Sep-29-2020
U.S. Bank, N.A.	Oct-14-2015	Sep-29-2016	$	25,000	$	618	1.3950	%	One-month L	Sep-29-2020
Capital One, N.A.	Oct-14-2015	Sep-29-2016	$	15,000	$	370	1.3950	%	One-month L	Sep-29-2020
Royal Bank of Canada	Jan-08-2015	Mar-20-2015	$	25,000	$	529	1.7090	%	One-month L	Mar-21-2021
The Toronto-Dominion Bank	Jan-08-2015	Mar-20-2015	$	25,000	$	526	1.7105	%	One-month L	Mar-21-2021
The Toronto-Dominion Bank	Jan-08-2015	Sep-10-2017	$	100,000	$	615	2.2255	%	One-month L	Mar-21-2021
Wells Fargo, N.A.	Jan-08-2015	Mar-20-2015	$	25,000	$	646	1.8280	%	One-month L	Mar-31-2022
The Toronto-Dominion Bank	Jan-08-2015	Feb-14-2020	$	25,000	$	105	2.4535	%	One-month L	Mar-31-2022
Regions Bank	Jan-08-2015	Feb-14-2020	$	50,000	$	188	2.4750	%	One-month L	Mar-31-2022
Capital One, N.A.	Jan-08-2015	Feb-14-2020	$	50,000	$	135	2.5300	%	One-month L	Mar-31-2022
The Toronto-Dominion Bank	Jul-20-2017	Oct-30-2017	$	25,000	$	768	1.8485	%	One-month L	Jan-04-2023
Royal Bank of Canada	Jul-20-2017	Oct-30-2017	$	25,000	$	770	1.8505	%	One-month L	Jan-04-2023
Wells Fargo, N.A.	Jul-20-2017	Oct-30-2017	$	25,000	$	770	1.8505	%	One-month L	Jan-04-2023
PNC Bank, N.A.	Jul-20-2017	Oct-30-2017	$	25,000	$	770	1.8485	%	One-month L	Jan-04-2023
PNC Bank, N.A.	Jul-20-2017	Oct-30-2017	$	50,000	$	1,542	1.8475	%	One-month L	Jan-04-2023

Schedule of interest rate swaps

The fair value of the interest rate swaps outstanding as of March 31, 2018 and December 31, 2017 was as follows.

Balance Sheet Line Item (in thousands)	Notional Amount March 31, 2018		Fair Value March 31, 2018		Notional Amount December 31, 2017		Fair Value December 31, 2017
Interest rate swaps-Asset	$	725,000	$	12,577	$	475,000	$	6,079
Interest rate swaps-Liability	$	—	$	—	$	250,000	$	(1,217	)

Schedule of the location in the financial statements of the gain or loss recognized on interest rate swaps

The table below presents the effect of cash flow hedge accounting and the location in the consolidated financial statements for the three months ended March 31, 2018 and 2017 (in thousands).

	Three months ended March 31,
	2018		2017
Income recognized in accumulated other comprehensive income on interest rate swaps	$	7,493	$	514
Loss reclassified from accumulated other comprehensive income into income (loss) as interest expense	$	230	$	698
Total interest expense presented in the Consolidated Statements of Operations in which the effects of cash flow hedges are recorded	$	11,386	$	10,472

Schedule of financial instruments accounted for at fair value on a recurring basis

The following sets forth the Company’s financial instruments that are accounted for at fair value on a recurring basis as of March 31, 2018 and December 31, 2017. 

			Fair Value Measurements as of March 31, 2018 Using
Balance Sheet Line Item (in thousands)	Fair Value March 31, 2018		Level 1		Level 2		Level 3
Interest rate swaps-Asset	$	12,577	$	—	$	12,577	$	—
Interest rate swaps-Liability	$	—	$	—	$	—	$	—

				Fair Value Measurements as of December 31, 2017 Using
Balance Sheet Line Item (in thousands)	Fair Value December 31, 2017			Level 1		Level 2			Level 3
Interest rate swaps-Asset	$	6,079		$	—	$	6,079		$	—
Interest rate swaps-Liability	$	(1,217	)	$	—	$	(1,217	)	$	—

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Equity (Tables)

3 Months Ended

Mar. 31, 2018

Stockholders' Equity Note [Abstract]

Schedule of Stock by Class

The table below sets forth the Company’s outstanding preferred stock issuances as of March 31, 2018.

Preferred Stock Issuances	Issuance Date	Number of Shares	Liquidation Value Per Share		Interest Rate
6.625% Series B Cumulative Redeemable Preferred Stock (“Series B Preferred Stock”)	April 16, 2013	2,800,000	$	25.00	6.625	%
6.875% Series C Cumulative Redeemable Preferred Stock (“Series C Preferred Stock”)	March 17, 2016	3,000,000	$	25.00	6.875	%

Schedule of dividends

The tables below set forth the dividends attributable to the Company's outstanding preferred stock issuances during the three months ended March 31, 2018 and the year ended December 31, 2017.

Quarter Ended 2018	Declaration Date	Series B Preferred Stock Per Share		Series C Preferred Stock Per Share		Payment Date
March 31	February 14, 2018	0.4140625		0.4296875		April 2, 2018
Total		$	0.4140625	$	0.4296875

Quarter Ended 2017	Declaration Date	Series B Preferred Stock Per Share		Series C Preferred Stock Per Share		Payment Date
December 31	November 2, 2017	$	0.4140625	$	0.4296875	December 29, 2017
September 30	July 31, 2017	0.4140625		0.4296875		September 29, 2017
June 30	May 1, 2017	0.4140625		0.4296875		June 30, 2017
March 31	February 15, 2017	0.4140625		0.4296875		March 31, 2017
Total		$	1.6562500	$	1.7187500

Dividends

The table below sets forth the dividends attributable to the Company's outstanding shares of common stock that were declared during the three months ended March 31, 2018 and the year ended December 31, 2017.

Month Ended 2018	Declaration Date	Record Date	Per Share		Payment Date
March 31	November 2, 2017	March 29, 2018	0.118333		April 16, 2018
February 28	November 2, 2017	February 28, 2018	0.118333		March 15, 2018
January 31	November 2, 2017	January 31, 2018	0.118333		February 15, 2018
Total			$	0.354999

Month Ended 2017	Declaration Date	Record Date	Per Share		Payment Date
December 31	July 31, 2017	December 29, 2017	$	0.117500	January 16, 2018
November 30	July 31, 2017	November 30, 2017	0.117500		December 15, 2017
October 31	July 31, 2017	October 31, 2017	0.117500		November 15, 2017
September 30	May 1, 2017	September 29, 2017	0.117500		October 16, 2017
August 31	May 1, 2017	August 31, 2017	0.117500		September 15, 2017
July 31	May 1, 2017	July 31, 2017	0.117500		August 15, 2017
June 30	February 15, 2017	June 30, 2017	0.116667		July 17, 2017
May 31	February 15, 2017	May 31, 2017	0.116667		June 15, 2017
April 30	February 15, 2017	April 28, 2017	0.116667		May 15, 2017
March 31	November 2, 2016	March 31, 2017	0.116667		April 17, 2017
February 28	November 2, 2016	February 28, 2017	0.116667		March 15, 2017
January 31	November 2, 2016	January 31, 2017	0.116667		February 15, 2017
Total			$	1.405002

Schedule of stock sale activity

The following table sets forth the terms of the Company’s at-the market (“ATM”) common stock offering program as of March 31, 2018.

ATM Common Stock Offering Program	Date	Maximum Aggregate Offering Price (in thousands)		Aggregate Common Stock Available as of March 31, 2018 (in thousands)
2017 $500 million ATM	November 13, 2017	$	500,000	$	489,674

The table below set forth the activity under the ATM common stock offering programs during the year ended December 31, 2017 (in thousands, except share data). There was no activity under the ATM common stock offering programs during three months ended March 31, 2018.

	Year ended December 31, 2017
ATM Common Stock Offering Program	Shares Sold	Weighted Average Price Per Share		Gross Proceeds		Sales Agents’ Fee		Net Proceeds
2017 $500 million ATM	363,843	$	28.38	$	10,326	$	129	$	10,197
2017 $300 million ATM(1)	11,098,748	$	27.03	300,000		3,637		296,363
2016 $228 million ATM(1)	4,799,784	$	24.42	117,216		1,604		115,612
Total/weighted average	16,262,375	$	26.29	$	427,542	$	5,370	$	422,172

(1) These programs ended before December 31, 2017.

Schedule of activity related to unvested restricted stock awards

The following table summarizes activity related to the Company’s unvested restricted shares of common stock for the three months ended March 31, 2018 and the year ended December 31, 2017.

Unvested Restricted Shares of Common Stock	Shares
Balance at December 31, 2016	272,337
Granted	75,001		(1)
Vested	(109,209	)	(2)
Forfeited	(922	)
Balance at December 31, 2017	237,207
Granted	76,659		(1)
Vested	(112,405	)	(2)
Forfeited	(5,090	)
Balance at March 31, 2018	196,371

(1) The fair value per share on the grant date of January 5, 2018 and January 6, 2017 was $26.40 and $24.41, respectively.

(2) The Company repurchased and retired 41,975 and 40,836 restricted shares of common stock that vested during the three months ended March 31, 2018 and the year ended December 31, 2017, respectively.

Schedule of vested restricted shares of common stock activity

The following table summarizes the fair value at vesting for the restricted shares of common stock that vested during the three months ended March 31, 2018 and 2017. 

	Three months ended March 31,
	2018		2017
Vested restricted shares of common stock	112,405		109,209
Fair value of vested restricted shares of common stock (in thousands)	$	3,002	$	2,591

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Noncontrolling Interest (Tables)

3 Months Ended

Mar. 31, 2018

Noncontrolling Interest [Abstract]

Noncontrolling interest activity

The table below summarizes the activity for noncontrolling interest in the Company for the three months ended March 31, 2018 and the year ended December 31, 2017.

	LTIP Units		Other Common Units		Total Noncontrolling Common Units		Noncontrolling Interest
Balance at December 31, 2016	1,576,516		2,057,365		3,633,881		4.3	%
Granted/Issued	126,239		687,827		814,066		N/A
Forfeited	—		—		—		N/A
Conversions from LTIP units to Other Common Units	(245,685	)	245,685		—		N/A
Redemptions from Other Common Units to common stock	—		(351,260	)	(351,260	)	N/A
Balance at December 31, 2017	1,457,070		2,639,617		4,096,687		4.1	%
Granted/Issued	324,802		—		324,802		N/A
Forfeited	—		—		—		N/A
Conversions from LTIP units to Other Common Units	(145,672	)	145,672		—		N/A
Redemptions from Other Common Units to common stock	—		(145,672	)	(145,672	)	N/A
Balance at March 31, 2018	1,636,200		2,639,617		4,275,817		4.2	%

Schedule of share-based payment award, LTIP unit awards, valuation assumptions

The table below sets forth the assumptions used in valuing such LTIP units granted during the three months ended March 31, 2018 (excluding those vested LTIP units granted pursuant to the 2015 OPP; refer to Note 8 for details).

LTIP Units	Assumptions
Grant date	March 12, 2018			January 5, 2018
Expected term (years)	10			10
Expected volatility	22.0		%	22.0		%
Expected dividend yield	6.0		%	6.0		%
Risk-free interest rate	2.46		%	2.09		%
Fair value of LTIP units at issuance (in thousands)	$	90		$	3,447
LTIP units at issuance	3,930			137,616
Fair value unit price per LTIP unit at issuance	$	22.90		$	25.05

Schedule of activity related to unvested LTIP unit awards

The following table summarizes activity related to the Company’s unvested LTIP units for the three months ended March 31, 2018 and the year ended December 31, 2017.

Unvested LTIP Units	LTIP Units
Balance at December 31, 2016	403,423
Granted	126,239
Vested	(229,355	)
Forfeited	—
Balance at December 31, 2017	300,307
Granted	324,802
Vested	(231,041	)
Forfeited	—
Balance at March 31, 2018	394,068

Schedule of vested LTIP unit award activity

The following table summarizes the fair value at vesting for the LTIP units that vested during the three months ended March 31, 2018 and 2017.

	Three months ended March 31,
	2018		2017
Vested LTIP units	231,041		67,670
Fair value of vested LTIP units (in thousands)	$	6,035	$	1,664

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Equity Incentive Plan (Tables)

3 Months Ended

Mar. 31, 2018

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of share-based payment award, performance unit awards, valuation assumptions

The table below sets forth the assumptions used in valuing the performance units granted during the three months ended March 31, 2018.

Performance Units	Assumptions
Grant date	January 5, 2018
Expected volatility	22.0		%
Expected dividend yield	6.0		%
Risk-free interest rate	2.09		%
Fair value of performance units grant (in thousands)	$	5,456

Summary of Equity Compensation Expense

The following table summarizes the amount recorded in general and administrative expenses in the accompanying Consolidated Statements of Operations for the amortization of restricted shares of common stock, LTIP units, performance units, the 2015 OPP (performance units and the 2015 OPP, collectively the “Performance-based Compensation Plans”), and the Company’s director compensation for the three months ended March 31, 2018 and 2017.

	Three months ended March 31,
Non-Cash Compensation Expense (in thousands)	2018		2017
Restricted shares of common stock	$	434	$	592
LTIP units	871		1,170
Performance-based Compensation Plans	829		537
Director compensation (1)	86		88
Total non-cash compensation expense	$	2,220	$	2,387

(1) All of the Company’s independent directors elected to receive shares of common stock in lieu of cash for their service during the three months ended March 31, 2018 and 2017. The number of shares of common stock granted is calculated based on the trailing 10 days average common stock price ending on the third business day preceding the grant date.

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Earnings Per Share (Tables)

3 Months Ended

Mar. 31, 2018

Earnings Per Share [Abstract]

Schedule of computation of basic and diluted earnings per common share

The following table sets forth the computation of basic and diluted earnings per common share for the three months ended March 31, 2018 and 2017.

	Three months ended March 31,
Earnings Per Share (in thousands, except per share data)	2018		2017
Numerator
Net income	$	25,149	$	69
Less: preferred stock dividends	2,448		2,448
Less: amount allocated to participating securities	71		83
Less: income (loss) attributable to noncontrolling interest after preferred stock dividends	954		(103		)
Net income (loss) attributable to common stockholders	$	21,676	$	(2,359	)
Denominator
Weighted average common shares outstanding — basic	97,021		81,808
Effect of dilutive securities(1)
Share-based compensation	302		—
Weighted average common shares outstanding — diluted	97,323		81,808
Net income (loss) per share — basic and diluted
Net income (loss) per share attributable to common stockholders — basic	$	0.22	$	(0.03	)
Net income (loss) per share attributable to common stockholders — diluted	$	0.22	$	(0.03	)

(1) During the three months ended March 31, 2018 and 2017, there were approximately 202 and 240, respectively, unvested restricted shares of common stock, respectively, on a weighted average basis that were not included in the computation of diluted earnings per share because to do so would have been antidilutive for the period. During the three months ended March 31, 2017, there were approximately 438 unvested shares under the Performance-based Compensation Plans on a weighted average basis that were not included in the computation of diluted earnings per share because to do so would have been antidilutive for the period.

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Organization and Description of Business (Details) ft² in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2018 ft² tenant state building	Dec. 31, 2017
Real Estate Properties [Line Items]
Ownership interest in Operating Partnership (as a percent)	95.80%	95.90%
Number of properties	360
Number of states in which the entity owned buildings | state	37
Area (in square feet) | ft²	70.8
Percentage of buildings leased to tenants	94.70%
Number of tenants | tenant	312
Warehouse - Distribution buildings
Real Estate Properties [Line Items]
Number of properties	291
Light Manufacturing buildings
Real Estate Properties [Line Items]
Number of properties	55
Flex/Office Buildings
Real Estate Properties [Line Items]
Number of properties	14

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Summary of Significant Accounting Policies - New Accounting Pronouncements (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Jan. 01, 2018	Dec. 31, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Increase to accumulated other comprehensive income (loss)	$ 11,581			$ 3,936
Increase in cash provided by operating activities	41,974	$ 31,408
Increase in cash used in investing activities	$ 36,112	102,089
Accounting Standards Update 2016-18 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Increase in cash provided by operating activities		300
Increase in cash used in investing activities		$ (1,100)
New Accounting Pronouncement, Early Adoption, Effect [Member] | Accounting Standards Update 2017-12 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Increase to accumulated other comprehensive income (loss)			$ 300
Decrease in accumulated distributions in excess of net income			$ 300

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Summary of Significant Accounting Policies - Restricted Cash (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017
Accounting Policies [Abstract]
Cash and cash equivalents	$ 10,455	$ 24,562	$ 7,082
Restricted cash	7,259	$ 3,567	8,720
Cash and cash equivalents and restricted cash—end of period	$ 17,714		$ 15,802

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Summary of Significant Accounting Policies - Tenant Accounts Receivable (Details) - USD ($)	Mar. 31, 2018	Dec. 31, 2017
Tenant Accounts Receivable, net
Lease security deposits available in existing letters of credit	$ 12,700,000	$ 12,700,000
Cash and Cash Equivalents
Tenant Accounts Receivable, net
Security deposit	7,700,000	7,400,000
Restricted Cash
Tenant Accounts Receivable, net
Security deposit	700,000	700,000
Security Deposits
Tenant Accounts Receivable, net
Lease security deposits available in cash	8,400,000	8,100,000
Prepaid Expenses and Other Assets
Tenant Accounts Receivable, net
Due from related parties	4,000	0
Trade Accounts Receivable
Tenant Accounts Receivable, net
Allowance for doubtful accounts	100,000	100,000
Accrued Income Receivable
Tenant Accounts Receivable, net
Allowance for doubtful accounts	100,000	200,000
Deferred Rent Receivables, Net	$ 25,900,000	$ 24,700,000

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Summary of Significant Accounting Policies - Revenue Recognition (Details) - USD ($)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Revenue Recognition
Estimated amount of real estate taxes, which are the responsibility of tenants	$ 3,100,000	$ 3,100,000
Buena Vista, VA, Q3 2012 | Rental income
Revenue Recognition
Gain (Loss) on Contract Termination	$ 100,000	$ 39,000

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Summary of Significant Accounting Policies - Taxes (Details) - USD ($)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Business Acquisition [Line Items]
Net income	$ 25,149,000	$ 69,000
State and local income, excise and franchise taxes	200,000	200,000
Liabilities for uncertain tax positions	0		$ 0
Real Estate Investment Trust
Business Acquisition [Line Items]
Net income	$ (36,000)	$ (31,000)

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Rental Property - Summary (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Property Subject to or Available for Operating Lease [Line Items]
Rental property, net	$ 2,588,354	$ 2,567,577
Deferred leasing intangibles assets, accumulated amortization	215,597	280,642
Land
Property Subject to or Available for Operating Lease [Line Items]
Rental property, net	324,734	321,560
Buildings, net of accumulated depreciation of $160,281 and $160,281, respectively
Property Subject to or Available for Operating Lease [Line Items]
Rental property, net	1,784,897	1,756,579
Rental property, accumulated depreciation	171,058	160,281
Tenant improvements, net of accumulated depreciation of $32,714 and $32,714, respectively
Property Subject to or Available for Operating Lease [Line Items]
Rental property, net	29,648	30,138
Rental property, accumulated depreciation	33,669	32,714
Building and land improvements, net of accumulated depreciation of $56,062 and $56,062, respectively
Property Subject to or Available for Operating Lease [Line Items]
Rental property, net	141,936	143,170
Rental property, accumulated depreciation	61,431	56,062
Construction in progress
Property Subject to or Available for Operating Lease [Line Items]
Rental property, net	1,951	2,877
Deferred leasing intangibles, net of accumulated amortization of $280,642 and $280,642, respectively
Property Subject to or Available for Operating Lease [Line Items]
Rental property, net	305,188	313,253
Deferred leasing intangibles assets, accumulated amortization	$ 215,597	$ 280,642

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Rental Property - Acquisitions (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2018 USD ($) ft² building
Business Acquisition [Line Items]
Area (in square feet)	70,800,000
Acquisitions 2018 [Member]
Business Acquisition [Line Items]
Area (in square feet)	1,091,868
Number of Buildings Acquired | building	6
Business Combination, Consideration Transferred | $	$ 78,821
Fountain Inn, SC, Q1 2018 [Member]
Business Acquisition [Line Items]
Area (in square feet)	203,000
Number of Buildings Acquired | building	1
Business Combination, Consideration Transferred | $	$ 10,755
Bloomington, MN, Q1 2018 [Member]
Business Acquisition [Line Items]
Area (in square feet)	145,351
Number of Buildings Acquired | building	1
Business Combination, Consideration Transferred | $	$ 13,538
York, PA, Q1 2018 [Member]
Business Acquisition [Line Items]
Area (in square feet)	278,582
Number of Buildings Acquired | building	1
Business Combination, Consideration Transferred | $	$ 18,277
Houston, TX, Q1 2018 [Member]
Business Acquisition [Line Items]
Area (in square feet)	242,225
Number of Buildings Acquired | building	2
Business Combination, Consideration Transferred | $	$ 22,478
Greer, SC, Q1 2018 [Member]
Business Acquisition [Line Items]
Area (in square feet)	222,710
Number of Buildings Acquired | building	1
Business Combination, Consideration Transferred | $	$ 13,773

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Rental Property - Acquisitions - Allocation of Consideration (Details) - Acquisitions 2018 [Member] $ in Thousands	3 Months Ended
	Mar. 31, 2018 USD ($)
Allocation of the consideration paid for the acquired assets and liabilities
Land	$ 6,415
Buildings	57,248
Tenant improvements	996
Building and land improvements	2,418
Deferred leasing intangibles - Below market leases	$ (673)
Weighted average amortization period of below market leases	9 years 7 months 25 days
Total purchase price	$ 78,821
In-place leases
Allocation of the consideration paid for the acquired assets and liabilities
Deferred leasing intangibles	$ 8,122
Weighted average amortization period of lease intangibles	6 years 3 months
Tenant relationships
Allocation of the consideration paid for the acquired assets and liabilities
Deferred leasing intangibles	$ 3,712
Weighted average amortization period of lease intangibles	10 years 5 months 15 days
Above market leases
Allocation of the consideration paid for the acquired assets and liabilities
Deferred leasing intangibles	$ 583
Weighted average amortization period of lease intangibles	5 years 8 months 31 days

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Rental Property - Acquisitions - Results of Operations (Details) - Acquisitions 2018 [Member] $ in Thousands	3 Months Ended
	Mar. 31, 2018 USD ($)
Business Acquisition [Line Items]
Revenue	$ 924
Net income (loss)	$ 104

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Rental Property - Disposals (Details) ft² in Millions	3 Months Ended
	Mar. 31, 2018 USD ($) ft² building	Mar. 31, 2017 USD ($)	Dec. 31, 2017 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of buildings disposed | building	360
Area (in square feet) | ft²	70.8
Carrying value of property sold	$ 2,588,354,000		$ 2,567,577,000
Disposal Group, Disposed of by Sale, Not Discontinued Operations | 2018 Disposals [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of buildings disposed | building	2
Area (in square feet) | ft²	0.7
Carrying value of property sold	$ 26,900,000
Net proceeds from sales of rental property	49,600,000
Gain (Loss) on Sale	22,700,000
Contribution to revenue	300,000	$ 900,000
Amount contributed to net income (loss) before gain on sale of rental property	$ 49,000	$ 46,000

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Rental Property - Held for Sale (Details)	3 Months Ended
	Mar. 31, 2018 USD ($) property building	Mar. 31, 2017 USD ($)	Dec. 31, 2017 USD ($)
Long Lived Assets Held-for-sale [Line Items]
Number of properties | building	360
Assets held for sale, net	$ 13,498,000		$ 19,916,000
Intangible Assets, Net (Excluding Goodwill)	$ 305,188,000		$ 313,253,000
Disposal Group, Held-for-sale, Not Discontinued Operations [Member]
Long Lived Assets Held-for-sale [Line Items]
Number of properties | property	2
Intangible Assets, Net (Excluding Goodwill)	$ 800,000
Contribution to revenue	200,000	$ 500,000
Amount contributed to net income (loss)	(800,000)	$ (29,000)
Disposal Group, Held-for-sale, Not Discontinued Operations [Member] | Land [Member]
Long Lived Assets Held-for-sale [Line Items]
Assets held for sale, net	2,000,000
Disposal Group, Held-for-sale, Not Discontinued Operations [Member] | Building and Building Improvements [Member]
Long Lived Assets Held-for-sale [Line Items]
Assets held for sale, net	$ 10,700,000

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Rental Property - Loss on Impairments (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2018 USD ($) building Rate
2018 Impairments [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loss on Impairment | $	$ 2,934
2018 Impairments [Member] | Income Approach Valuation Technique | Fair Value, Inputs, Level 3
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Fair Value Disclosure | $	$ 3,176
2018 Impairments [Member] | Income Approach Valuation Technique | Minimum | Fair Value, Inputs, Level 3
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Fair Value Inputs, Discount Rate	11.00%
Fair Value Inputs Exit Capitalization Rate	11.00%
2018 Impairments [Member] | Income Approach Valuation Technique | Maximum | Fair Value, Inputs, Level 3
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Fair Value Inputs, Discount Rate	14.50%
Fair Value Inputs Exit Capitalization Rate	13.00%
Buena Vista, VA, Q3 2012
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of Buildings Impaired | building	1
Sergeant Bluff, IA, Q4 2007
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of Buildings Impaired | building	1

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Rental Property - Deferred Leasing Intangibles (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Above market lease, gross	$ 520,785		$ 593,895
Deferred leasing intangibles assets, accumulated amortization	(215,597)		(280,642)
Above market lease, net	305,188		313,253
Below market lease, gross	32,041		34,776
Below market lease, accumulated amortization	(11,321)		(13,555)
Below market lease, net	20,720		21,221
Above market leases
Finite-Lived Intangible Assets [Line Items]
Above market lease, gross	70,675		78,558
Deferred leasing intangibles assets, accumulated amortization	(30,725)		(36,810)
Above market lease, net	39,950		41,748
Net decrease to rental income related to above and below market lease amortization
Finite-Lived Intangible Assets [Line Items]
Net decrease to rental revenue related to above and below market lease amortization	1,207	$ 1,296
Estimated Net Amortization of In-Place Leases, Leasing Commissions and Tenant Relationships
Remainder of 2018	2,987
2019	3,846
2020	3,504
2021	2,178
2022	1,210
Other intangible lease assets
Finite-Lived Intangible Assets [Line Items]
Above market lease, gross	450,110		515,337
Deferred leasing intangibles assets, accumulated amortization	(184,872)		(243,832)
Above market lease, net	265,238		$ 271,505
Amortization expense related to other intangible lease assets	18,100	$ 18,393
Estimated Net Amortization of In-Place Leases, Leasing Commissions and Tenant Relationships
Remainder of 2018	48,805
2019	50,905
2020	40,954
2021	30,242
2022	$ 23,113

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Debt - Summary (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Long-term debt, gross	$ 1,201,394	$ 1,179,855
Unamortized debt issuance costs	(5,869)	(6,135)
Debt Instrument, Unused Borrowing Capacity, Amount	301,100
Unamortized fair market value premium	58	61
Principal outstanding	$ 1,195,583	1,173,781
Weighted average interest rate	3.56%
Interest Rate Swaps
Debt Instrument [Line Items]
Notional amount	$ 600,000
One Month LIBOR
Debt Instrument [Line Items]
Variable rate basis reference rate (as a percent)	1.88313%
$150 Million Unsecured Term Loan D [Member]
Debt Instrument [Line Items]
Debt Instrument, Unused Borrowing Capacity, Amount	$ 75,000
Mortgage Loans Payable
Debt Instrument [Line Items]
Long-term debt, gross	58,394	58,855
Unamortized debt issuance costs	(601)	(634)
Unamortized fair market value premium	58	61
Principal outstanding	57,851	58,282
Mortgage Loans Payable | Wells Fargo Bank, National Association CMBS Loan
Debt Instrument [Line Items]
Long-term debt, gross	$ 54,515	54,949
Stated interest rate	4.31%
Penalty free prepayment period	3 months
Mortgage Loans Payable | Thrivent Financial for Lutherans Due December 15, 2023 [Member]
Debt Instrument [Line Items]
Long-term debt, gross	$ 3,879	3,906
Stated interest rate	4.78%
Penalty free prepayment period	3 months
Unsecured Term Loans
Debt Instrument [Line Items]
Long-term debt, gross	$ 525,000	450,000
Unsecured Term Loans | Term Loan
Debt Instrument [Line Items]
Long-term debt, gross	525,000	450,000
Unamortized debt issuance costs	(3,494)	(3,735)
Principal outstanding	521,506	446,265
Unsecured Term Loans | $150 Million Wells Fargo Unsecured Term Loan C
Debt Instrument [Line Items]
Long-term debt, gross	$ 150,000	$ 150,000
Interest rate margin (as a percent)	1.30%	1.30%
Unsecured Term Loans | $150 Million Wells Fargo Unsecured Term Loan B
Debt Instrument [Line Items]
Long-term debt, gross	$ 150,000	$ 150,000
Interest rate margin (as a percent)	1.30%	1.30%
Unsecured Term Loans | $150 Million Wells Fargo Unsecured Term Loan A
Debt Instrument [Line Items]
Long-term debt, gross	$ 150,000	$ 150,000
Interest rate margin (as a percent)	1.30%	1.30%
Unsecured Term Loans | $150 Million Unsecured Term Loan D [Member]
Debt Instrument [Line Items]
Long-term debt, gross	$ 75,000	$ 0
Interest rate margin (as a percent)	1.30%	1.30%
Unsecured Notes
Debt Instrument [Line Items]
Long-term debt, gross	$ 400,000	$ 400,000
Unsecured Notes | Unsecured Notes
Debt Instrument [Line Items]
Long-term debt, gross	400,000	400,000
Unamortized debt issuance costs	(1,774)	(1,766)
Principal outstanding	398,226	398,234
Unsecured Notes | $100 Million Series F Unsecured Notes
Debt Instrument [Line Items]
Long-term debt, gross	$ 100,000	100,000
Stated interest rate	3.98%
Unsecured Notes | $50 Million Series A Unsecured Notes
Debt Instrument [Line Items]
Long-term debt, gross	$ 50,000	50,000
Stated interest rate	4.98%
Unsecured Notes | $100 Million Series D Unsecured Notes
Debt Instrument [Line Items]
Long-term debt, gross	$ 100,000	100,000
Stated interest rate	4.32%
Unsecured Notes | $50 Million Series B Unsecured Notes
Debt Instrument [Line Items]
Long-term debt, gross	$ 50,000	50,000
Stated interest rate	4.98%
Unsecured Notes | $80 Million Series C Unsecured Notes
Debt Instrument [Line Items]
Long-term debt, gross	$ 80,000	80,000
Stated interest rate	4.42%
Unsecured Notes | $20 Million Series E Unsecured Notes
Debt Instrument [Line Items]
Long-term debt, gross	$ 20,000	20,000
Stated interest rate	4.42%
Unsecured Credit Facility
Debt Instrument [Line Items]
Principal outstanding	$ 218,000	$ 271,000
Interest rate margin (as a percent)	1.15%	1.15%
Maximum borrowing capacity	$ 450,000
Unsecured Credit Facility | Prepaid Expenses and Other Assets
Debt Instrument [Line Items]
Unamortized debt issuance costs	$ (1,300)	$ (1,500)

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Debt - 2018 Activity (Details) - USD ($) $ in Thousands		3 Months Ended
	Mar. 28, 2018	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Debt Instrument [Line Items]
Debt Instrument, Unused Borrowing Capacity, Amount		$ 301,100
Amortization of deferred financing fees		534	$ 501
Net book value of properties that are collateral for debt arrangements		89,800		$ 90,900
Accounts Payable, Accrued Expenses and Other Liabilities
Debt Instrument [Line Items]
Interest payable		5,400		$ 5,600
$150 Million Unsecured Term Loan D [Member]
Debt Instrument [Line Items]
Debt Instrument, Unused Borrowing Capacity, Amount		75,000
$150 Million Unsecured Term Loan D [Member] | Unsecured Term Loans
Debt Instrument [Line Items]
Proceeds from Issuance of Debt	$ 75,000
Interest Expense [Member] | Unsecured Credit Facility
Debt Instrument [Line Items]
Line of Credit Facility, Commitment Fee Amount		$ 339	$ 275

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Debt - Fair Value (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Long-term debt, gross	$ 1,201,394	$ 1,179,855
Unamortized fair market value premium	58	61
Unamortized debt issuance costs	(5,869)	(6,135)
Principal outstanding	1,195,583	1,173,781
Long-term debt, fair value	1,213,725	1,198,359
Unsecured Term Loans
Debt Instrument [Line Items]
Long-term debt, gross	525,000	450,000
Long-term debt, fair value	526,685	451,463
Unsecured Credit Facility
Debt Instrument [Line Items]
Principal outstanding	218,000	271,000
Long-term debt, fair value	218,371	271,528
Unsecured Notes
Debt Instrument [Line Items]
Long-term debt, gross	400,000	400,000
Long-term debt, fair value	410,058	415,599
Mortgage Loans Payable
Debt Instrument [Line Items]
Long-term debt, gross	58,394	58,855
Unamortized fair market value premium	58	61
Unamortized debt issuance costs	(601)	(634)
Principal outstanding	57,851	58,282
Long-term debt, fair value	$ 58,611	$ 59,769

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Use of Derivative Financial Instruments - Risk Management and Unsecured Loan Swaps (Details) $ in Thousands	Mar. 31, 2018 USD ($)
Interest Rate Swaps
Unsecured Term Loan Swaps
Notional amount	$ 600,000
Interest Rate Derivative, Regions Bank, March 01, 2013
Unsecured Term Loan Swaps
Notional amount	25,000
Fair value	$ 461
Fixed Interest Rate (as a percent)	1.33%
Interest Rate Derivative, Capital One, July 01, 2013
Unsecured Term Loan Swaps
Notional amount	$ 50,000
Fair value	$ 595
Fixed Interest Rate (as a percent)	1.681%
Interest Rate Derivative, Capital One, August 01, 2013
Unsecured Term Loan Swaps
Notional amount	$ 25,000
Fair value	$ 287
Fixed Interest Rate (as a percent)	1.703%
Interest Rate Derivative, Regions Bank, February 03, 2014
Unsecured Term Loan Swaps
Notional amount	$ 25,000
Fair value	$ 153
Fixed Interest Rate (as a percent)	1.9925%
Interest Rate Derivative, The Toronto-Dominion Bank, September 29, 2016
Unsecured Term Loan Swaps
Notional amount	$ 25,000
Fair value	$ 622
Fixed Interest Rate (as a percent)	1.383%
Interest Rate Derivative, PNC Bank, September 29, 2016
Unsecured Term Loan Swaps
Notional amount	$ 50,000
Fair value	$ 1,237
Fixed Interest Rate (as a percent)	1.3906%
Interest Rate Derivative, Regions Bank, September 29, 2016
Unsecured Term Loan Swaps
Notional amount	$ 35,000
Fair value	$ 870
Fixed Interest Rate (as a percent)	1.3858%
Interest Rate Derivative, US Bank, September 29, 2016
Unsecured Term Loan Swaps
Notional amount	$ 25,000
Fair value	$ 618
Fixed Interest Rate (as a percent)	1.395%
Interest Rate Derivative, Capital One, September 29, 2016
Unsecured Term Loan Swaps
Notional amount	$ 15,000
Fair value	$ 370
Fixed Interest Rate (as a percent)	1.395%
Interest Rate Derivative, Royal Bank of Canada, March 20, 2015
Unsecured Term Loan Swaps
Notional amount	$ 25,000
Fair value	$ 529
Fixed Interest Rate (as a percent)	1.709%
Interest Rate Derivative, The Toronto-Dominion Bank, March 20, 2015
Unsecured Term Loan Swaps
Notional amount	$ 25,000
Fair value	$ 526
Fixed Interest Rate (as a percent)	1.7105%
Interest Rate Derivative, The Toronto-Dominion Bank, September 10, 2017
Unsecured Term Loan Swaps
Notional amount	$ 100,000
Fair value	$ 615
Fixed Interest Rate (as a percent)	2.2255%
Interest Rate Derivative, Wells Fargo Bank, March 20, 2015
Unsecured Term Loan Swaps
Notional amount	$ 25,000
Fair value	$ 646
Fixed Interest Rate (as a percent)	1.828%
Interest Rate Derivative, The Toronto-Dominion Bank, February 14, 2020
Unsecured Term Loan Swaps
Notional amount	$ 25,000
Fair value	$ 105
Fixed Interest Rate (as a percent)	2.4535%
Interest Rate Derivative, Regions Bank, February 14, 2020
Unsecured Term Loan Swaps
Notional amount	$ 50,000
Fair value	$ 188
Fixed Interest Rate (as a percent)	2.475%
Interest Rate Derivative, Capital One, February 14, 2020
Unsecured Term Loan Swaps
Notional amount	$ 50,000
Fair value	$ 135
Fixed Interest Rate (as a percent)	2.53%
Interest Rate Derivative, The Toronto-Dominion Bank, October 30, 2017
Unsecured Term Loan Swaps
Notional amount	$ 25,000
Fair value	$ 768
Fixed Interest Rate (as a percent)	1.8485%
Interest Rate Derivative, Royal Bank of Canada, October 30, 2017
Unsecured Term Loan Swaps
Notional amount	$ 25,000
Fair value	$ 770
Fixed Interest Rate (as a percent)	1.8505%
Interest Rate Derivative, Wells Fargo Bank, October 30, 2017
Unsecured Term Loan Swaps
Notional amount	$ 25,000
Fair value	$ 770
Fixed Interest Rate (as a percent)	1.8505%
Interest Rate Derivative, PNC Bank, $25m, October 30, 2017
Unsecured Term Loan Swaps
Notional amount	$ 25,000
Fair value	$ 770
Fixed Interest Rate (as a percent)	1.8485%
Interest Rate Derivative, PNC Bank, $50m, October 30, 2017
Unsecured Term Loan Swaps
Notional amount	$ 50,000
Fair value	$ 1,542
Fixed Interest Rate (as a percent)	1.8475%

XML

Use of Derivative Financial Instruments - FV of Interest Rate Swaps (Details) - Interest Rate Swaps - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Fair value of the interest rate swaps outstanding
Notional amount assets	$ 725,000	$ 475,000
Fair value - assets	12,577	6,079
Notional amount liabilities	0	250,000
Fair Value - liabilities	$ 0	$ (1,217)

XML

Use of Derivative Financial Instruments - Cash Flow Hedges and Contingent Features (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Cash Flow Hedges of Interest Rate Risk
Total interest expense presented in the Consolidated Statements of Operations in which the effects of cash flow hedges are recorded	$ 11,386	$ 10,472
Interest Rate Swaps
Cash Flow Hedges of Interest Rate Risk
Additional amount reclassified from accumulated other comprehensive income (loss) as an increase to interest expense over the next twelve months	2,300
Income recognized in accumulated other comprehensive income on interest rate swaps	7,493	514
Loss reclassified from accumulated other comprehensive income into income (loss) as interest expense	230	698
Total interest expense presented in the Consolidated Statements of Operations in which the effects of cash flow hedges are recorded	$ 11,386	$ 10,472

XML

Use of Derivative Financial Instruments - FV on Recurring Basis (Details) - Interest Rate Swaps - Fair value on recurring basis - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Assets (liabilities):
Interest rate swaps-Asset	$ 12,577	$ 6,079
Interest rate swaps-Liability	0	(1,217)
Level 1
Assets (liabilities):
Interest rate swaps-Asset	0	0
Interest rate swaps-Liability	0	0
Level 2
Assets (liabilities):
Interest rate swaps-Asset	12,577	6,079
Interest rate swaps-Liability	0	(1,217)
Level 3
Assets (liabilities):
Interest rate swaps-Asset	0	0
Interest rate swaps-Liability	$ 0	$ 0

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Equity - Preferred Stock (Details) - $ / shares												3 Months Ended	12 Months Ended
	Apr. 10, 2018	Apr. 02, 2018	Feb. 14, 2018	Dec. 29, 2017	Nov. 02, 2017	Sep. 29, 2017	Jul. 31, 2017	Jun. 30, 2017	May 01, 2017	Mar. 31, 2017	Feb. 15, 2017	Mar. 31, 2018	Dec. 31, 2017
Class of Stock [Line Items]
Preferred stock, shares authorized												15,000,000	15,000,000
Preferred stock, par value (in dollars per share)												$ 0.01	$ 0.01
Series B Preferred Stock
Class of Stock [Line Items]
Number of shares sold												2,800,000
Preferred stock, liquidation preference (in dollars per share)												$ 25.00	25.00
Dividend rate (as a percent)												6.625%
Preferred Stock, Dividends Per Share, Declared			$ 0.4140625		$ 0.4140625		$ 0.4140625		$ 0.4140625		$ 0.4140625	$ 0.4140625	1.6562500
Preferred Stock, Dividends, Per Share, Cash Paid				$ 0.4140625		$ 0.4140625		$ 0.4140625		$ 0.4140625		$ 0.4140625	1.6562500
Series B Preferred Stock | Non-recognized Subsequent Event
Class of Stock [Line Items]
Preferred Stock, Dividends Per Share, Declared	$ 0.4140625
Series C Preferred Stock
Class of Stock [Line Items]
Number of shares sold												3,000,000
Preferred stock, liquidation preference (in dollars per share)												$ 25.00	25.00
Dividend rate (as a percent)												6.875%
Preferred Stock, Dividends Per Share, Declared			$ 0.4296875		$ 0.4296875		$ 0.4296875		$ 0.4296875		$ 0.4296875	$ 0.4296875	1.7187500
Preferred Stock, Dividends, Per Share, Cash Paid				$ 0.4296875		$ 0.4296875		$ 0.4296875		$ 0.4296875		$ 0.4296875	$ 1.7187500
Series C Preferred Stock | Non-recognized Subsequent Event
Class of Stock [Line Items]
Preferred Stock, Dividends Per Share, Declared	$ 0.4296875
Scenario, Forecast [Member] | Series B Preferred Stock
Class of Stock [Line Items]
Preferred Stock, Dividends, Per Share, Cash Paid		$ 0.4140625
Scenario, Forecast [Member] | Series C Preferred Stock
Class of Stock [Line Items]
Preferred Stock, Dividends, Per Share, Cash Paid		$ 0.4296875

XML

Equity - Common Stock ATM (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Class of Stock [Line Items]
Proceeds from sales of common stock	$ 0	$ 68,543
At The Market Program 2017 $500 Million | Common Stock
Class of Stock [Line Items]
Common Stock Value Authorized under Stock Offering Program	500,000
Aggregate value of common stock available to be sold under the ATM	$ 489,674
Number of shares sold			363,843
Proceeds from sales of common stock			$ 10,326
Sales agents' fee			129
Net proceeds			$ 10,197
At The Market Program 2017 $300 Million | Common Stock
Class of Stock [Line Items]
Number of shares sold			11,098,748
Proceeds from sales of common stock			$ 300,000
Sales agents' fee			3,637
Net proceeds			$ 296,363
At The Market Program 2016 $228 Million | Common Stock
Class of Stock [Line Items]
Number of shares sold			4,799,784
Proceeds from sales of common stock			$ 117,216
Sales agents' fee			1,604
Net proceeds			$ 115,612
At The Market (ATM) Program | Common Stock
Class of Stock [Line Items]
Number of shares sold			16,262,375
Proceeds from sales of common stock			$ 427,542
Sales agents' fee			5,370
Net proceeds			$ 422,172
Weighted Average | At The Market Program 2017 $500 Million | Common Stock
Class of Stock [Line Items]
Issue price (in dollars per share)			$ 28.38
Weighted Average | At The Market Program 2017 $300 Million | Common Stock
Class of Stock [Line Items]
Issue price (in dollars per share)			27.03
Weighted Average | At The Market Program 2016 $228 Million | Common Stock
Class of Stock [Line Items]
Issue price (in dollars per share)			24.42
Weighted Average | At The Market (ATM) Program | Common Stock
Class of Stock [Line Items]
Issue price (in dollars per share)			$ 26.29

XML

Equity - Common Stock Dividends (Details) - Common Stock - $ / shares																					3 Months Ended	12 Months Ended
	Apr. 16, 2018	Apr. 10, 2018	Mar. 15, 2018	Feb. 15, 2018	Jan. 16, 2018	Dec. 15, 2017	Nov. 15, 2017	Nov. 02, 2017	Oct. 16, 2017	Sep. 15, 2017	Aug. 15, 2017	Jul. 31, 2017	Jul. 17, 2017	Jun. 15, 2017	May 15, 2017	May 01, 2017	Apr. 17, 2017	Mar. 15, 2017	Feb. 15, 2017	Nov. 02, 2016	Mar. 31, 2018	Dec. 31, 2017
Class of Stock [Line Items]
Common Stock, Dividends, Per Share, Cash Paid			$ 0.118333	$ 0.118333	$ 0.117500	$ 0.117500	$ 0.117500		$ 0.117500	$ 0.117500	$ 0.117500		$ 0.116667	$ 0.116667	$ 0.116667		$ 0.116667	$ 0.116667	$ 0.116667		$ 0.354999	$ 1.405002
Common Stock, Dividends, Per Share, Declared								$ 0.118333				$ 0.117500				$ 0.117500			$ 0.116667	$ 0.116667	$ 0.354999	$ 1.405002
Scenario, Forecast [Member]
Class of Stock [Line Items]
Common Stock, Dividends, Per Share, Cash Paid	$ 0.118333
Non-recognized Subsequent Event
Class of Stock [Line Items]
Common Stock, Dividends, Per Share, Declared		$ 0.118333

XML

Equity - Restricted Stock (Details) - Restricted stock - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Shares
Unvested at beginning of period (in shares)	237,207	272,337	272,337
Granted (in shares)	76,659		75,001
Vested (in shares)	(112,405)	(109,209)	(109,209)
Forfeited (in shares)	(5,090)		(922)
Unvested at end of period (in shares)	196,371		237,207
Grant date fair value (in dollars per share)	$ 26.40		$ 24.41
Stock Repurchased and Retired During Period, Shares	41,975		40,836
Unrecognized compensation costs	$ 4,100
Unrecognized compensation costs, period for recognition	2 years 10 months 10 days
Vested (in shares)	(112,405)	(109,209)	(109,209)
Fair value of shares vested	$ 3,002	$ 2,591
Granted on January 5, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period (in years)	4 years

XML

Noncontrolling Interest - Summary (Details) - shares	3 Months Ended	12 Months Ended
	Mar. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Noncontrolling interest
Noncontrolling interest ownership percentage	4.20%	4.10%	4.30%
Noncontrolling Interest - Unit holders in Operating Partnership
Noncontrolling interest
Units outstanding, balance at beginning of period (in units)	4,096,687	3,633,881
Granted/Issued (in units)	324,802	814,066
Forfeitures (in units)	0	0
Limited Partners' Capital Account, Units, Converted	0	0
Redemptions from Other Common Units to common stock (in units)	(145,672)	(351,260)
Units outstanding, balance at end of period (in units)	4,275,817	4,096,687
LTIP Units | Noncontrolling Interest - Unit holders in Operating Partnership
Noncontrolling interest
Units outstanding, balance at beginning of period (in units)	1,457,070	1,576,516
Granted/Issued (in units)	324,802	126,239
Forfeitures (in units)	0	0
Limited Partners' Capital Account, Units, Converted	145,672	245,685
Redemptions from Other Common Units to common stock (in units)	0	0
Units outstanding, balance at end of period (in units)	1,636,200	1,457,070
Other Common Units | Noncontrolling Interest - Unit holders in Operating Partnership
Noncontrolling interest
Units outstanding, balance at beginning of period (in units)	2,639,617	2,057,365
Granted/Issued (in units)	0	687,827
Forfeitures (in units)	0	0
Limited Partners' Capital Account, Units, Converted	(145,672)	(245,685)
Redemptions from Other Common Units to common stock (in units)	(145,672)	(351,260)
Units outstanding, balance at end of period (in units)	2,639,617	2,639,617

XML

Noncontrolling Interest - LTIP FV Assumptions (Details) - LTIP Units - USD ($) $ / shares in Units, $ in Thousands			3 Months Ended	12 Months Ended
	Mar. 12, 2018	Jan. 05, 2018	Mar. 31, 2018	Dec. 31, 2017
Assumptions
Units at issuance (in shares)			324,802	126,239
Granted on March 12, 2018
Assumptions
Expected term	10 years
Expected volatility (as a percent)	22.00%
Expected dividend yield (as a percent)	6.00%
Risk-free interest rate (as a percent)	2.46%
Fair value of units at issuance	$ 90
Units at issuance (in shares)	3,930
Fair value share price per unit (in dollars per share)	$ 22.90
Granted on January 5, 2018
Assumptions
Expected term		10 years
Expected volatility (as a percent)		22.00%
Expected dividend yield (as a percent)		6.00%
Risk-free interest rate (as a percent)		2.09%
Fair value of units at issuance		$ 3,447
Units at issuance (in shares)		137,616
Fair value share price per unit (in dollars per share)		$ 25.05
Executive Officer [Member] | Share-based Compensation Award, Tranche One [Member] | Granted on January 5, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period (in years)		4 years

XML

Noncontrolling Interest - LTIP Units (Details) - LTIP Units - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation costs	$ 7,500
Unrecognized compensation costs, period for recognition	2 years 9 months 10 days
Units
Unvested at beginning of period (in shares)	300,307	403,423	403,423
Granted (in shares)	324,802		126,239
Vested (in shares)	(231,041)	(67,670)	(229,355)
Forfeited (in shares)	0		0
Unvested at end of period (in shares)	394,068		300,307
Fair value of shares vested	$ 6,035	$ 1,664

XML

Equity Incentive Plan - Performance Plan Assumptions (Details) - Performance shares - Awarded in 2018 $ in Thousands	Jan. 05, 2018 USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Value of awards	$ 5,456
Weighted Average
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate	22.00%
Expected dividend yield (as a percent)	6.00%
Risk-free interest rate (as a percent)	2.09%

XML

Equity Incentive Plan - 2018 Activity (Details) - USD ($) $ in Thousands		3 Months Ended
	Jan. 01, 2018	Mar. 31, 2018	Mar. 31, 2017
LTIP Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value		$ 6,035	$ 1,664
Unrecognized compensation costs		$ 7,500
Unrecognized compensation costs, period for recognition		2 years 9 months 10 days
Performance shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation costs		$ 7,800
Unrecognized compensation costs, period for recognition		2 years 7 months 30 days
Outperformance Program2015 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period (in years)	3 years
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value	$ 6,200
Outperformance Program2015 [Member] | LTIP Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Issued During Period, Shares, Share-based Compensation, Gross	183,256
Outperformance Program2015 [Member] | Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Issued During Period, Shares, Share-based Compensation, Gross	53,722
Stock Repurchased and Retired During Period, Shares	15,183

XML

Equity Incentive Plan - Equity Non-cash Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Common Stock
Equity Incentive Plan
Number of days of average trailing stock price used to calculate number of shares of common stock granted	10 days
General and Administrative Expenses
Equity Incentive Plan
Share-based compensation	$ 2,220	$ 2,387
General and Administrative Expenses | Independent Director
Equity Incentive Plan
Share-based compensation	86	88
General and Administrative Expenses | Restricted stock
Equity Incentive Plan
Share-based compensation	434	592
General and Administrative Expenses | LTIP Units
Equity Incentive Plan
Share-based compensation	871	1,170
General and Administrative Expenses | Performance shares
Equity Incentive Plan
Share-based compensation	$ 829	$ 537

XML

Earnings Per Share (Details) - shares	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Earnings Per Share [Abstract]
Participating securities	201,650	239,827

XML

Earnings Per Share - Reconciliation of Numerator and Denominator (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Numerator
Net income	$ 25,149	$ 69
Less: preferred stock dividends	2,448	2,448
Less: amount allocated to participating securities	71	83
Less: income (loss) attributable to noncontrolling interest after preferred stock dividends	954	(103)
Net income (loss) attributable to common stockholders	$ 21,676	$ (2,359)
Denominator
Weighted average common shares outstanding — basic	97,021,000	81,808,000
Share-based compensation	302,000	0
Weighted average common shares outstanding — diluted	97,323,000	81,808,000
Net income (loss) per share — basic and diluted
Net income (loss) per share attributable to common stockholders — basic	$ 0.22	$ (0.03)
Net income (loss) per share attributable to common stockholders — diluted	$ 0.22	$ (0.03)
Restricted stock
Net income (loss) per share — basic and diluted
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	202,000	240,000
Performance shares
Net income (loss) per share — basic and diluted
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount		438,000

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Commitments and Contingencies - Agreements (Details) $ in Millions	Mar. 31, 2018 USD ($)
Commitments and Contingencies Disclosure [Abstract]
Letters of credit outstanding	$ 5.9

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Subsequent Events Subsequent Events - Debt (Details) - Non-recognized Subsequent Event $ in Millions	Apr. 10, 2018 USD ($) Rate
$75 Million Series G Unsecured Notes [Member]
Subsequent Event [Line Items]
Debt Instrument, Face Amount | $	$ 75.0
Stated interest rate | Rate	4.10%
$100 Million Series H Unsecured Notes [Member]
Subsequent Event [Line Items]
Debt Instrument, Face Amount | $	$ 100.0
Stated interest rate | Rate	4.27%