Elme Communities (ELME) 10-Q 29 Oct 19 2019 Q3 Quarterly report Financial data

Cover Page

Cover Page - shares	9 Months Ended
	Sep. 30, 2019	Oct. 24, 2019
Cover page.
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2019
Document Transition Report	false
Entity File Number	1-6622
Entity Registrant Name	WASHINGTON REAL ESTATE INVESTMENT TRUST
Entity Central Index Key	0000104894
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q3
Amendment Flag	false
Entity Incorporation, State or Country Code	MD
Entity Tax Identification Number	53-0261100
Entity Address, Address Line One	1775 EYE STREET, NW
Entity Address, Address Line Two	SUITE 1000
Entity Address, City or Town	WASHINGTON
Entity Address, State or Province	DC
Entity Address, Postal Zip Code	20006
City Area Code	202
Local Phone Number	774-3200
Title of 12(b) Security	Shares of Beneficial Interest
Trading Symbol	WRE
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		80,594,744

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Assets
Land	$ 611,797	$ 526,572
Income producing property	2,486,966	2,055,349
Net income producing property, at cost	3,098,763	2,581,921
Accumulated depreciation and amortization	(724,433)	(669,281)
Net income producing property	2,374,330	1,912,640
Properties under development or held for future development	110,572	87,231
Total real estate held for investment, net	2,484,902	1,999,871
Investment in real estate held for sale, net	0	203,410
Cash and cash equivalents	12,931	6,016
Restricted cash	1,578	1,624
Rents and other receivables	69,414	63,962
Prepaid expenses and other assets	106,251	123,670
Other assets related to properties held for sale	0	18,551
Total assets	2,675,076	2,417,104
Liabilities
Notes payable, net	996,455	995,397
Mortgage notes payable, net	47,319	48,277
Line of credit	211,000	188,000
Accounts payable and other liabilities	75,735	57,946
Dividend payable	0	24,022
Advance rents	9,475	9,965
Tenant security deposits	10,849	9,501
Other liabilities related to properties held for sale	0	15,518
Total liabilities	1,350,833	1,348,626
Shareholders’ equity
Preferred shares; $0.01 par value; 10,000 shares authorized; no shares issued or outstanding	0	0
Shares of beneficial interest, $0.01 par value; 100,000 shares authorized; 80,292 and 79,910 shares issued and outstanding, as of September 30, 2019 and December 31, 2018, respectively	803	799
Additional paid in capital	1,539,734	1,526,574
Distributions in excess of net income	(212,978)	(469,085)
Accumulated other comprehensive (loss) income	(3,659)	9,839
Total shareholders’ equity	1,323,900	1,068,127
Noncontrolling interests in subsidiaries	343	351
Total equity	1,324,243	1,068,478
Total liabilities and equity	$ 2,675,076	$ 2,417,104

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - $ / shares	Sep. 30, 2019	Dec. 31, 2018
Statement of Financial Position [Abstract]
Preferred shares, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred shares, shares authorized (in shares)	10,000,000	10,000,000
Preferred shares, shares issued (in shares)	0	0
Preferred shares, shares outstanding (in shares)	0	0
Shares of beneficial interest, par value (in dollars per share)	$ 0.01	$ 0.01
Shares of beneficial interest, shares authorized (in shares)	100,000,000	100,000,000
Shares of beneficial interest, shares issued (in shares)	80,292,000	79,910,000
Shares of beneficial interest, shares outstanding (in shares)	80,292,000	79,910,000

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Revenue
Real estate rental revenue		$ 80,259	$ 71,001	$ 228,513	$ 219,990
Expenses
Real estate expenses		30,692	25,988	84,969	79,938
Depreciation and amortization		37,340	27,951	97,441	83,134
General and administrative expenses		6,045	5,267	18,517	16,737
Lease origination expenses		416	0	1,286	0
Real estate impairment		0	0	8,374	1,886
Expenses		74,493	59,206	210,587	181,695
(Loss) gain on sale of real estate		0	0	(1,046)	2,495
Real estate operating income		5,766	11,795	16,880	40,790
Other expense
Interest expense		(14,198)	(12,342)	(41,946)	(38,155)
Loss on extinguishment of debt		0	0	0	(1,178)
Other expense		(14,198)	(12,342)	(41,946)	(39,333)
(Loss) income from continuing operations		(8,432)	(547)	(25,066)	1,457
Discontinued operations:
Income from operations of properties sold or held for sale		2,942	6,440	16,158	18,485
Gain on sale of real estate		339,024	0	339,024	0
Loss on extinguishment of debt		(764)	0	(764)	0
Income from discontinued operations		341,202	6,440	354,418	18,485
Net income		332,770	5,893	329,352	19,942
Less: Net income attributable to noncontrolling interests in subsidiaries		0	0	0	0
Net income attributable to the controlling interests		$ 332,770	$ 5,893	$ 329,352	$ 19,942
Basic net (loss) income attributable to the controlling interests per share:
Continuing operations, basic (in dollars per share)		$ (0.10)	$ (0.01)	$ (0.31)	$ 0.01
Discontinued operations, basic (in dollars per share)		4.24	0.08	4.41	0.23
Basic net income attributable to the controlling interests per common share (in dollars per share)	[1]	4.14	0.07	4.10	0.25
Diluted net (loss) income attributable to the controlling interests per share:
Continuing operations, diluted (in dollars per share)		(0.10)	(0.01)	(0.31)	0.01
Discontinued operations, diluted (in dollars per share)		4.24	0.08	4.41	0.23
Diluted net income attributable to the controlling interests per common share (in dollars per share)	[1]	$ 4.14	$ 0.07	$ 4.10	$ 0.25
Weighted average shares outstanding - basic (in shares)		79,981	79,076	79,933	78,695
Weighted average shares outstanding - diluted (in shares)		79,981	79,076	79,933	78,802
[1]	Earnings per share may not sum due to rounding

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Statement of Comprehensive Income [Abstract]
Net income	$ 332,770	$ 5,893	$ 329,352	$ 19,942
Unrealized (loss) gain on interest rate hedges	(2,387)	1,474	(13,498)	7,762
Comprehensive income	330,383	7,367	315,854	27,704
Less: Comprehensive income attributable to noncontrolling interests	0	0	0	0
Comprehensive income attributable to the controlling interests	$ 330,383	$ 7,367	$ 315,854	$ 27,704

Consolidated Statements of Equi

Consolidated Statements of Equity - USD ($) shares in Thousands, $ in Thousands	Total	Shares of Beneficial Interest	Additional Paid in Capital	Distributions in Excess of Net Income	Accumulated Other Comprehensive Income (Loss)	Total Shareholders’ Equity	Noncontrolling Interests in Subsidiaries
Balance (in shares) at Dec. 31, 2017		78,510
Balance at Dec. 31, 2017	$ 1,095,336	$ 785	$ 1,483,980	$ (399,213)	$ 9,419	$ 1,094,971	$ 365
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income attributable to the controlling interests	19,942			19,942		19,942
Unrealized gain (loss) on interest rate hedges	7,762				7,762	7,762
Distributions to noncontrolling interests	(11)						(11)
Dividends	(71,478)			(71,478)		(71,478)
Equity issuances, net of issuance costs (in shares)		1,165
Equity issuances, net of issuance costs	$ 35,472	$ 11	35,461			35,472
Shares issued under dividend reinvestment program (in shares)	74	74
Shares issued under dividend reinvestment program	$ 1,811	$ 1	1,810			1,811
Share grants, net of forfeitures and tax withholdings (in shares)		95
Share grants, net of forfeitures and tax withholdings	4,875	$ 1	4,874			4,875
Balance (in shares) at Sep. 30, 2018		79,844
Balance at Sep. 30, 2018	1,093,709	$ 798	1,526,125	(450,749)	17,181	1,093,355	354
Balance (in shares) at Jun. 30, 2018		78,661
Balance at Jun. 30, 2018	1,072,633	$ 787	1,488,366	(432,585)	15,707	1,072,275	358
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income attributable to the controlling interests	5,893			5,893		5,893
Unrealized gain (loss) on interest rate hedges	1,474				1,474	1,474
Distributions to noncontrolling interests	(4)						(4)
Dividends	(24,057)			(24,057)		(24,057)
Equity issuances, net of issuance costs (in shares)		1,165
Equity issuances, net of issuance costs	$ 35,472	$ 11	35,461			35,472
Shares issued under dividend reinvestment program (in shares)	18	18
Shares issued under dividend reinvestment program	$ 565	$ 0	565			565
Share grants, net of forfeitures and tax withholdings (in shares)		0
Share grants, net of forfeitures and tax withholdings	1,733		1,733			1,733
Balance (in shares) at Sep. 30, 2018		79,844
Balance at Sep. 30, 2018	1,093,709	$ 798	1,526,125	(450,749)	17,181	1,093,355	354
Balance (in shares) at Dec. 31, 2018		79,910
Balance at Dec. 31, 2018	1,068,478	$ 799	1,526,574	(469,085)	9,839	1,068,127	351
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income attributable to the controlling interests	329,352			329,352		329,352
Unrealized gain (loss) on interest rate hedges	(13,498)				(13,498)	(13,498)
Distributions to noncontrolling interests	(8)						(8)
Dividends	(72,339)			(72,339)		(72,339)
Equity issuances, net of issuance costs (in shares)		145
Equity issuances, net of issuance costs	$ 3,681	$ 2	3,679			3,681
Shares issued under dividend reinvestment program (in shares)	128	128
Shares issued under dividend reinvestment program	$ 3,430	$ 1	3,429			3,430
Share grants, net of forfeitures and tax withholdings (in shares)		109
Share grants, net of forfeitures and tax withholdings	6,053	$ 1	6,052			6,053
Balance (in shares) at Sep. 30, 2019		80,292
Balance at Sep. 30, 2019	1,324,243	$ 803	1,539,734	(212,978)	(3,659)	1,323,900	343
Balance (in shares) at Jun. 30, 2019		80,082
Balance at Jun. 30, 2019	1,010,708	$ 801	1,532,497	(521,661)	(1,272)	1,010,365	343
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income attributable to the controlling interests	332,770			332,770		332,770
Unrealized gain (loss) on interest rate hedges	(2,387)				(2,387)	(2,387)
Dividends	(24,087)			(24,087)		(24,087)
Equity issuances, net of issuance costs (in shares)		145
Equity issuances, net of issuance costs	$ 3,681	$ 2	3,679			3,681
Shares issued under dividend reinvestment program (in shares)	64	64
Shares issued under dividend reinvestment program	$ 1,757	$ 0	1,757			1,757
Share grants, net of forfeitures and tax withholdings (in shares)		1
Share grants, net of forfeitures and tax withholdings	1,801		1,801			1,801
Balance (in shares) at Sep. 30, 2019		80,292
Balance at Sep. 30, 2019	$ 1,324,243	$ 803	$ 1,539,734	$ (212,978)	$ (3,659)	$ 1,323,900	$ 343

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Cash flows from operating activities
Net income	$ 329,352	$ 19,942
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	102,367	90,119
Credit (recoveries) losses on lease related receivables	(45)	1,077
Real estate impairment	8,374	1,886
Gain on sale of real estate	(337,978)	(2,495)
Share-based compensation expense	6,265	5,064
Amortization of debt premiums, discounts and related financing costs	2,632	1,565
Loss on extinguishment of debt	764	0
Loss on extinguishment of debt	0	1,178
Changes in operating other assets	(12,353)	(9,233)
Changes in operating other liabilities	(8,098)	(8,229)
Net cash provided by operating activities	91,280	100,874
Cash flows from investing activities
Real estate acquisitions, net	(528,588)	(106,400)
Net cash received for sale of real estate	582,551	174,297
Capital improvements to real estate	(30,588)	(33,437)
Development in progress	(26,884)	(25,036)
Non-real estate capital improvements	(317)	(626)
Net cash (used in) provided by investing activities	(3,826)	8,798
Cash flows from financing activities
Line of credit borrowings, net	23,000	17,000
Dividends paid	(96,361)	(95,059)
Principal payments – mortgage notes payable	(12,596)	(169,480)
Repayments of unsecured term loan debt	(450,000)	(150,000)
Proceeds from term loan	450,000	250,000
Payment of financing costs	(1,219)	(5,565)
Distributions to noncontrolling interests	(8)	(11)
Proceeds from dividend reinvestment program	3,430	1,811
Net proceeds from equity issuances	3,681	35,472
Payment of tax withholdings for restricted share awards	(512)	(301)
Net cash used in financing activities	(80,585)	(116,133)
Net increase (decrease) in cash, cash equivalents and restricted cash	6,869	(6,461)
Cash, cash equivalents and restricted cash at beginning of period	7,640	12,623
Cash, cash equivalents and restricted cash at end of period	14,509	6,162
Supplemental disclosure of cash flow information:
Cash paid for interest, net of amounts capitalized	34,481	32,021
Change in accrued capital improvements and development costs	13,638	6,352
Reconciliation of cash, cash equivalents and restricted cash:
Cash, cash equivalents and restricted cash	$ 7,640	$ 12,623

Nature of Business

Nature of Business	9 Months Ended
	Sep. 30, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Nature of Business	NATURE OF BUSINESS Washington Real Estate Investment Trust (“WashREIT”), a Maryland real estate investment trust, is a self-administered equity real estate investment trust, successor to a trust organized in 1960. Our business consists of the ownership and operation of income producing real estate properties in the greater Washington metro region. We own a diversified portfolio of commercial and multifamily buildings. During the 2019 Quarter (as defined below), we sold eight retail properties (see note 3 ). These properties met the criteria for classification as discontinued operations. The remaining retail properties do not meet the qualitative or quantitative criteria for a reportable segment (see note 11 ). The acquisitions of multifamily properties and dispositions of retail properties are part of a strategic shift away from the retail sector to the multifamily sector. This strategic shift simplifies our portfolio to two reportable segments (office and multifamily) and reduces our exposure to future retail lease expirations. Federal Income Taxes We believe that we qualify as a real estate investment trust (“REIT”) under Sections 856-860 of the Internal Revenue Code of 1986, as amended (the "Code"), and intend to continue to qualify as such. To maintain our status as a REIT, we are, among other things, required to distribute 90% of our REIT taxable income (which is, generally, our ordinary taxable income, with certain modifications), excluding any net capital gains and any deductions for dividends paid to our shareholders on an annual basis. When selling a property, we generally have the option of (a) reinvesting the sales proceeds of property sold, in a way that allows us to defer recognition of some or all taxable gain realized on the sale, (b) distributing gains to the shareholders with no tax to us or (c) treating net long-term capital gains as having been distributed to our shareholders, paying the tax on the gain deemed distributed and allocating the tax paid as a credit to our shareholders. Seven of the eight retail properties sold during the 2019 Quarter were identified for deferred exchanges under Section 1031 of the Code (see note 3). We acquired eight multifamily replacement properties (see note 3) during the 2019 Period (as defined below). Generally, and subject to our ongoing qualification as a REIT, no provisions for income taxes are necessary except for taxes on undistributed taxable income and taxes on the income generated by our taxable REIT subsidiaries (“TRSs”). Our TRSs are subject to corporate federal and state income tax on their taxable income at regular statutory rates, or as calculated under the alternative minimum tax, as appropriate. As of both September 30, 2019 and December 31, 2018 , our TRSs had a deferred tax asset of $1.4 million that was fully reserved. As of both September 30, 2019 and December 31, 2018 , we had deferred state and local tax liabilities of $0.6 million . These deferred tax liabilities are primarily related to temporary differences in the timing of the recognition of revenue, depreciation and amortization.

Summary of Significant Accounti

Summary of Significant Accounting Policies and Basis of Presentations	9 Months Ended
	Sep. 30, 2019
Accounting Policies [Abstract]
Summary of Significant Accounting Policies and Basis of Presentations	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES AND BASIS OF PRESENTATIONS Significant Accounting Policies We have prepared our consolidated financial statements using the accounting policies described in our Annual Report on Form 10-K for the year ended December 31, 2018 , except as noted in note 4 related to our adoption of ASU 2016-02, Leases (Topic 842) as of January 1, 2019. Pronouncements Adopted Standard/Description Effective Date and Adoption Considerations Effect on Financial Statements or Other significant Matters ASU 2016-02, Leases (Topic 842) (“ASU 2016-02”). This standard amends existing lease accounting standards for both lessees and lessors. Lessees must classify most leases as either finance or operating leases. For lease contracts, or contracts with an embedded lease, with a duration of more than one year in which we are the lessee, the present value of future lease payments are recognized on our consolidated balance sheets as a right-of-use asset and a corresponding lease liability. Leases (Topic 842) - Targeted Improvements (“ASU 2018-11”), which provides lessors optional transition relief from implementing this aspect of ASU 2016-02 if the following criteria are met: (1) both components have the same timing and pattern of revenue and (2) if accounted for separately, both components would be classified as an operating lease. We adopted the new standard as of January 1, 2019. We adopted ASU 2016-02 as of January 1, 2019 using the modified retrospective approach and by applying the transitional practical expedients noted below. Under the modified retrospective approach, we recognized a cumulative effect adjustment of $0.9 million to retained earnings as of January 1, 2019 (see note 4 for further discussion of the impact of adoption on our consolidated financial statements). We did not elect the hindsight expedient, which would have allowed us to reevaluate lease terms in calculating lease liabilities as part of adoption. Under ASU 2018-11, the FASB offered optional transition relief, if elected as a package, and applied consistently by an entity to all of its leases. Accordingly, upon adoption we elected, as a package, the practical expedients for all leases as follows: (1) we will not reassess whether any expired or existing contracts are or contain leases, (2) we will not reassess the lease classification for any expired or existing leases, and (3) we will not reassess initial direct costs for any existing leases. Pronouncements Not Yet Adopted Standard/Description Effective Date and Adoption Considerations Effect on Financial Statements or Other significant Matters ASU 2016-13, Measurement of Credit Losses on Financial Instruments . This standard requires financial assets measured at an amortized cost basis, including trade receivables, to be presented at the net amount expected to be collected. The new standard is effective for public entities for fiscal years beginning after December 15, 2019 and for interim periods therein, with adoption one year earlier permitted. We are currently evaluating the impact the new standard may have on our consolidated financial statements. ASU 2018-15, Intangibles - Goodwill and Other - Internal-Use Software . This standard requires a customer in a cloud computing arrangement that is a service contract to follow the internal-use software guidance to determine which implementation costs to capitalize as assets. The standard is effective for public entities for fiscal years beginning after December 31, 2019 and for interim periods therein, with early adoption permitted. We are currently evaluating the impact the new standard may have on our consolidated financial statements. Principles of Consolidation and Basis of Presentation The accompanying unaudited consolidated financial statements include the consolidated accounts of WashREIT, our majority-owned subsidiaries and entities in which WashREIT has a controlling interest. All intercompany balances and transactions have been eliminated in consolidation. We have prepared the accompanying unaudited financial statements pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”). Certain information and note disclosures normally included in annual financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to those rules and regulations, although we believe that the disclosures made are adequate to make the information presented not misleading. In addition, in the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation of the results for the periods presented have been included. These unaudited financial statements should be read in conjunction with the financial statements and notes included in our Annual Report on Form 10-K for the year ended December 31, 2018 . Within these notes to the financial statements, we refer to the three months ended September 30, 2019 and September 30, 2018 as the “ 2019 Quarter” and the “ 2018 Quarter,” respectively, and the nine months ended September 30, 2019 and September 30, 2018 as the “ 2019 Period” and the “ 2018 Period,” respectively. Discontinued Operations We classify properties as held for sale when they meet the necessary criteria, which include: (a) senior management commits to a plan to sell the assets, (b) the assets are available for immediate sale in their present condition subject only to terms that are usual and customary for sales of such assets, (c) an active program to locate a buyer and other actions required to complete the plan to sell the assets have been initiated, (d) the sale of the assets is probable, and transfer of the assets is expected to qualify for recognition as a completed sale, within one year, (e) the assets are being actively marketed for sale at a price that is reasonable in relation to its current fair value and (f) actions required to complete the plan indicate that it is unlikely that significant changes to the plan will be made or that the plan will be withdrawn. Depreciation on these properties is discontinued at the time they are classified as held for sale, but operating revenues, operating expenses and interest expense continue to be recognized until the date of sale. Revenues and expenses of properties that are either sold or classified as held for sale are presented as discontinued operations for all periods presented in the consolidated statements of operations if the dispositions represent a strategic shift that has (or will have) a major effect on our operations and financial results. Interest on debt that can be identified as specifically attributed to these properties is included in discontinued operations. If the dispositions do not represent a strategic shift that has (or will have) a major effect on our operations and financial results, then the revenues and expenses of the properties that are classified as sold or held for sale are presented as continuing operations in the consolidated statements of operations for all periods presented. Restricted Cash Restricted cash includes funds escrowed for tenant security deposits, real estate tax, insurance and mortgage escrows and escrow deposits required by lenders on certain of our properties to be used for future building renovations or tenant improvements. Use of Estimates in the Financial Statements The preparation of financial statements in conformity with GAAP requires management to make certain estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.

Real Estate

Real Estate	9 Months Ended
	Sep. 30, 2019
Real Estate [Abstract]
Real Estate	REAL ESTATE Acquisitions We acquired the following properties during the 2019 Period: Acquisition Date Property Type # of units (unaudited) Contract Purchase Price (in thousands) April 30, 2019 Assembly Portfolio - Virginia (1) Multifamily 1,685 $ 379,100 June 27, 2019 Assembly Portfolio - Maryland (2) Multifamily 428 82,070 July 23, 2019 Cascade at Landmark Multifamily 277 69,750 2,390 $ 530,920 (1) Consists of Assembly Alexandria, Assembly Manassas, Assembly Dulles, Assembly Leesburg, and Assembly Herndon. (2) Consists of Assembly Germantown and Assembly Watkins Mill. The Assembly Portfolio - Virginia and Assembly Portfolio - Maryland properties are collectively the “Assembly Portfolio.” The purchases of the Assembly Portfolio and Cascade at Landmark were structured as exchanges under Section 1031 of the Code in a manner such that legal title was held by an Exchange Accommodator until certain identified properties were sold and the deferred exchanges were completed. We retained all of the legal and economic benefits and obligations related to the Assembly Portfolio and Cascade at Landmark. As such, the Assembly Portfolio and Cascade at Landmark were considered to be variable interest entities until legal title was transferred to us upon completion of the 1031 exchanges, which occurred during the 2019 Quarter. We consolidated the assets and liabilities of the Assembly Portfolio and Cascade at Landmark because we determined that WashREIT was the primary beneficiary of the Assembly Portfolio and Cascade at Landmark. The results of operations from the 2019 acquisitions are included in the consolidated statements of operations as of their acquisition dates and are as follows: Three Months Ended September 30, 2019 Nine Months Ended September 30, 2019 Real estate rental revenue $ 11,013 $ 16,467 Net loss (4,698 ) (8,179 ) We accounted for the 2019 acquisitions as asset acquisitions. Accordingly, we capitalized $2.9 million of costs directly associated with the acquisitions. We measured the value of the acquired physical assets (land and building) and in-place leases (absorption costs) by allocating the total cost of the acquisitions on a relative fair value basis. The total cost of the 2019 acquisitions was as follows (in thousands): Assembly Portfolio Cascade at Landmark Total Contract purchase price $ 461,170 $ 69,750 $ 530,920 Credit to buyer (2,252 ) — (2,252 ) Capitalized acquisition costs 2,362 498 2,860 Total $ 461,280 $ 70,248 $ 531,528 We have recorded the total cost of the 2019 acquisitions as follows (in thousands): Land $ 92,391 Building 423,663 Absorption costs 15,474 Total $ 531,528 The weighted remaining average life for the absorption costs is two months . The difference in the total cost of the acquisitions of $531.5 million and the acquisition cost per the consolidated statements of cash flows of $528.6 million is primarily due to credits received at settlement totaling $2.9 million . Development/Redevelopment We have properties under development/redevelopment and held for current or future development as of September 30, 2019 . In the multifamily segment, we have The Trove, a multifamily development adjacent to The Wellington, and own land held for future multifamily development adjacent to Riverside Apartments. As of September 30, 2019 , we had invested $95.7 million and $24.2 million , including the costs of acquiring the land, in The Trove and the development adjacent to Riverside Apartments, respectively. We substantially completed major construction activities for The Trove garage levels 1-5 during the 2019 Quarter and placed into service assets totaling $12.0 million . We also had a redevelopment project to add rentable space at Spring Valley Village, a retail center in Washington, DC. As of September 30, 2019 , we had invested $6.5 million in the redevelopment. We substantially completed major construction activities on this project during the fourth quarter of 2018 and placed into service assets totaling $4.2 million . Properties Sold and Held for Sale We intend to hold our properties for investment with a view to long-term appreciation, to engage in the business of acquiring, developing and owning our properties, and to make occasional sales of the properties that no longer meet our long-term strategy or return objectives and where market conditions for sale are favorable. The proceeds from the sales may be reinvested into other properties, used to fund development operations or to support other corporate needs, or distributed to our shareholders. We sold the following properties during 2019 and 2018: Disposition Date Property Name Property Type Rentable Square Feet Contract Sales Price (Loss) Gain on Sale June 26, 2019 Quantico Corporate Center (1) Office 272,000 $ 33,000 $ (1,046 ) July 23, 2019 Shopping Center Portfolio (2) Retail 800,000 485,250 333,023 August 21, 2019 Frederick Crossing and Frederick County Square Retail 520,000 57,500 9,507 August 27, 2019 Centre at Hagerstown Retail 330,000 23,500 (3,506 ) Total 2019 1,922,000 $ 599,250 $ 337,978 January 19, 2018 Braddock Metro Center Office 356,000 $ 93,000 $ — June 28, 2018 2445 M Street Office 292,000 101,600 2,495 Total 2018 648,000 $ 194,600 $ 2,495 (1) Consists of 925 and 1000 Corporate Drive. (2) Consists of five retail properties: Gateway Overlook, Wheaton Park, Olney Village Center, Bradlee Shopping Center and Shoppes of Foxchase. During the first quarter of 2018, we executed a purchase and sale agreement to sell 2445 M Street, a 292,000 square foot office property in Washington, DC, for a contract sales price of $100.0 million , with settlement originally scheduled for the third quarter of 2018. During 2017, we evaluated 2445 M Street for impairment and recognized a $24.1 million impairment charge in order to reduce the carrying value of the property to its estimated fair value. Upon execution of the purchase and sale agreement, the property met the criteria for classification as held for sale. Due to the property’s classification as held for sale, we recorded an additional impairment charge of $1.9 million in the first quarter of 2018 in order to reduce the carrying value of the property to its estimated fair value, less estimated selling costs. We based this fair value on the expected sales price from a potential sale. There are few observable market transactions for similar properties. This fair valuation falls into Level 2 of the fair value hierarchy due to its reliance on a quoted price in a market that is not active. During the second quarter of 2018, we executed an amendment to the purchase and sale agreement which increased the contract sales price to $101.6 million and advanced the settlement date. On June 28, 2018, we sold 2445 M Street, recognizing a gain on sale of real estate of $2.5 million . During the first quarter of 2019, we executed a letter of intent for the sale of Quantico Corporate Center, an office property in Stafford, Virginia, consisting of two office buildings totaling 272,000 square feet. The property did not meet the criteria for classification as held for sale as of March 31, 2019. Due to the negotiations to sell the property, we evaluated Quantico Corporate Center for impairment and recognized an $8.4 million impairment charge during the first quarter of 2019 in order to reduce the carrying value of the property to its estimated fair value. We based this fair valuation on the expected sale price from a potential sale. There are few observable market transactions for similar properties. This fair valuation falls into Level 2 of the fair value hierarchy due to its reliance on a quoted price in a market that is not active. On April 22, 2019, we executed a purchase and sale agreement to sell Quantico Corporate Center for a contract sale price of $33.0 million . On June 26, 2019 , we sold Quantico Corporate Center, recognizing a loss on sale of real estate of $1.0 million . In June 2019, we entered into two separate purchase and sale agreements with two separate buyers to sell the Shopping Center Portfolio and the Power Center Portfolio (Frederick Crossing, Frederick County Square and Centre at Hagerstown). As of June 30, 2019, we had a non-refundable deposit from the potential buyer of the Shopping Center Portfolio and expected to receive a non-refundable deposit from the potential buyer of the Power Center Portfolio in July 2019. As of June 30, 2019, the properties in the Retail Portfolio (as defined below) met the criteria for classification as held for sale. We closed on the Shopping Center Portfolio sale transaction on July 23, 2019, recognizing a gain on sale of real estate of $333.0 million . Prior to closing on the disposition of the Shopping Center Portfolio, we prepaid the mortgage note secured by Olney Village Center, incurring a loss on extinguishment of debt of approximately $0.8 million , which we recognized in the 2019 Quarter. Subsequent to the end of the second quarter of 2019, the purchase and sale agreement to sell the Power Center Portfolio was amended to include only Frederick Crossing and Frederick County Square. We closed on the sales of these assets on August 21, 2019, recognizing a gain on sale of real estate of $9.5 million . Following the amendment to the purchase and sale agreement to sell the Power Center Portfolio, we marketed Centre at Hagerstown for sale and identified a separate buyer. We closed on the sales of this asset on August 27, 2019, recognizing a loss on sale of real estate of $3.5 million . References to the “Retail Portfolio” include the Shopping Center Portfolio, Frederick Crossing, Frederick County Square and Centre at Hagerstown. The disposition of the Retail Portfolio represents a strategic shift that will have a major effect on our financial results and we have accordingly reported the Retail Portfolio as discontinued operations. The Retail Portfolio represents a majority of our retail assets and we have determined that our retail line of business is no longer a reportable segment (see note 11). We have fully transferred control of the assets associated with the sold properties. Discontinued Operations The results of the Retail Portfolio are classified as discontinued operations and are summarized as follows (amounts in thousands, except for share data): Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 Real estate rental revenue $ 4,126 $ 11,500 $ 28,200 $ 33,998 Real estate expenses (1,095 ) (2,582 ) (6,803 ) (8,036 ) Depreciation and amortization (59 ) (2,321 ) (4,926 ) (6,985 ) Interest expense (30 ) (157 ) (313 ) (492 ) Loss on extinguishment of debt (764 ) — (764 ) — Gain on sale of real estate 339,024 — 339,024 — Income from discontinued operations $ 341,202 $ 6,440 $ 354,418 $ 18,485 Basic net income per share $ 4.24 $ 0.08 $ 4.41 $ 0.23 Diluted net income per share $ 4.24 $ 0.08 $ 4.41 $ 0.23 Capital expenditures $ — $ 1,020 $ 809 $ 1,834 All assets related to the Retail Portfolio were sold as of September 30, 2019 . As of December 31, 2018 , assets related to the Retail Portfolio were as follows (in thousands): December 31, 2018 Land $ 88,087 Income producing property 216,577 304,664 Accumulated depreciation and amortization (101,254 ) Income producing property, net 203,410 Rents and other receivables 9,898 Prepaid expenses and other assets 8,653 Total assets $ 221,961 All liabilities related to the Retail Portfolio were sold as of September 30, 2019 . As of December 31, 2018 , liabilities related to the Retail Portfolio were as follows (in thousands): December 31, 2018 Mortgage notes payable, net $ 11,515 Accounts payable and other liabilities 1,620 Advance rents 1,771 Tenant security deposits 612 Liabilities related to properties sold or held for sale $ 15,518

Lease Accounting

Lease Accounting	9 Months Ended
	Sep. 30, 2019
Leases [Abstract]
Lease Accounting	LEASE ACCOUNTING Leasing as a Lessor Revenue Recognition We lease multifamily properties under operating leases with terms of generally one year or less. We lease commercial properties (our office and retail properties) under operating leases with an average term of seven years . Substantially all commercial leases contain fixed escalations or, in some instances, changes based on the Consumer Price Index, which occur at specified times during the term of the lease. In certain commercial leases, variable lease income, such as percentage rent, is recognized when rents are earned. We recognize rental income and rental abatements from our multifamily and commercial leases on a straight-line basis over the lease term. Recognition of rental income commences when control of the leased space has been transferred to the tenant. We recognize cost reimbursement income from pass-through expenses on an accrual basis over the periods in which the expenses were incurred. Pass-through expenses are comprised of real estate taxes, operating expenses and common area maintenance costs which are reimbursed by tenants in accordance with specific allowable costs per tenant lease agreements. Parking revenues are derived from leases, monthly parking agreements and transient parking. We recognize parking revenues from leases on a straight-line basis over the lease term and other parking revenues as earned. We recognize transient parking revenue when our performance obligation is met. Upon adoption of ASU 2016-02, we elected not to bifurcate lease contracts into lease and non-lease components, since the timing and pattern of revenue is not materially different and the non-lease components are not the primary component of the lease. Accordingly, both lease and non-lease components are presented in “Real estate rental revenue” in our consolidated financial statements. The adoption of ASU 2016-02 did not result in a material change to our recognition of real estate rental revenue. Accounts Receivable Lease related receivables, which include contractual amounts accrued and unpaid from tenants and accrued straight-line rents receivable, are reduced for credit losses. Such amounts are recognized as a reduction to real estate rental revenues. We evaluate the collectability of lease receivables monthly using several factors including a lessee’s creditworthiness. We recognize the credit loss on lease related receivables when, in the opinion of management, collection of substantially all lease payments is not probable. When collectability is determined not probable, any lease income recognized subsequent to recognizing the credit loss is limited to the lesser of the lease income reflected on a straight-line basis or cash collected. The adoption of ASU 2016-02 resulted in an adjustment to our opening distributions in excess of net income balance of $0.9 million , associated with lease related receivables where collection of substantially all operating lease payments was not probable as of January 1, 2019. Future Minimum Rental Income As of September 30, 2019 , non-cancelable commercial operating leases provide for future minimum rental income from continuing operations as follows (in thousands). Apartment leases are not included as the terms are generally for one year or less. 2019 $ 38,665 2020 153,366 2021 136,394 2022 122,558 2023 105,126 Thereafter 396,401 $ 952,510 As of December 31, 2018, non-cancelable commercial operating leases provide for future minimum rental income from continuing operations as follows (in thousands): 2019 $ 154,260 2020 143,566 2021 125,008 2022 108,688 2023 89,969 Thereafter 253,749 $ 875,240 Leasing as a Lessee 2000 M Street, an office property in Washington, DC, is subject to an operating ground lease with a remaining term of 52 years . Rental payments under this lease are subject to percentage rent variable payments, which are not included as part of our measurement of straight-line rental expense. We recognized variable rental payments of $0.3 million during each of the 2019 and 2018 Quarters and $0.9 million and $0.8 million during 2019 and 2018 Periods, respectively. Upon adoption of ASU 2016-02, we recognized a right of use asset (included in Income producing property) and lease liability (included in Accounts payable and other liabilities) of $4.2 million . We used a discount rate of approximately 5.9% , which was derived from our assessment of securitized rates for similar assets and credit quality. We recognized $0.1 million and $0.2 million of right-of-use and lease liability amortization during the 2019 Quarter and 2019 Period, respectively. In addition, as of January 1, 2019 we reclassified the associated below-market ground lease intangible asset of $10.0 million , net of accumulated amortization of $2.1 million , from Prepaid expenses and other assets to Income producing property on our consolidated balance sheets. The following table sets forth the undiscounted cash flows of our scheduled obligations for future minimum payments on our operating ground lease as of September 30, 2019 and a reconciliation of those cash flows to the operating lease liability as of September 30, 2019 (in thousands): 2019 $ 65 2020 260 2021 260 2022 260 2023 260 2024 260 Thereafter 11,895 13,260 Imputed interest (9,229 ) Lease liability $ 4,031
Lease Accounting	LEASE ACCOUNTING Leasing as a Lessor Revenue Recognition We lease multifamily properties under operating leases with terms of generally one year or less. We lease commercial properties (our office and retail properties) under operating leases with an average term of seven years . Substantially all commercial leases contain fixed escalations or, in some instances, changes based on the Consumer Price Index, which occur at specified times during the term of the lease. In certain commercial leases, variable lease income, such as percentage rent, is recognized when rents are earned. We recognize rental income and rental abatements from our multifamily and commercial leases on a straight-line basis over the lease term. Recognition of rental income commences when control of the leased space has been transferred to the tenant. We recognize cost reimbursement income from pass-through expenses on an accrual basis over the periods in which the expenses were incurred. Pass-through expenses are comprised of real estate taxes, operating expenses and common area maintenance costs which are reimbursed by tenants in accordance with specific allowable costs per tenant lease agreements. Parking revenues are derived from leases, monthly parking agreements and transient parking. We recognize parking revenues from leases on a straight-line basis over the lease term and other parking revenues as earned. We recognize transient parking revenue when our performance obligation is met. Upon adoption of ASU 2016-02, we elected not to bifurcate lease contracts into lease and non-lease components, since the timing and pattern of revenue is not materially different and the non-lease components are not the primary component of the lease. Accordingly, both lease and non-lease components are presented in “Real estate rental revenue” in our consolidated financial statements. The adoption of ASU 2016-02 did not result in a material change to our recognition of real estate rental revenue. Accounts Receivable Lease related receivables, which include contractual amounts accrued and unpaid from tenants and accrued straight-line rents receivable, are reduced for credit losses. Such amounts are recognized as a reduction to real estate rental revenues. We evaluate the collectability of lease receivables monthly using several factors including a lessee’s creditworthiness. We recognize the credit loss on lease related receivables when, in the opinion of management, collection of substantially all lease payments is not probable. When collectability is determined not probable, any lease income recognized subsequent to recognizing the credit loss is limited to the lesser of the lease income reflected on a straight-line basis or cash collected. The adoption of ASU 2016-02 resulted in an adjustment to our opening distributions in excess of net income balance of $0.9 million , associated with lease related receivables where collection of substantially all operating lease payments was not probable as of January 1, 2019. Future Minimum Rental Income As of September 30, 2019 , non-cancelable commercial operating leases provide for future minimum rental income from continuing operations as follows (in thousands). Apartment leases are not included as the terms are generally for one year or less. 2019 $ 38,665 2020 153,366 2021 136,394 2022 122,558 2023 105,126 Thereafter 396,401 $ 952,510 As of December 31, 2018, non-cancelable commercial operating leases provide for future minimum rental income from continuing operations as follows (in thousands): 2019 $ 154,260 2020 143,566 2021 125,008 2022 108,688 2023 89,969 Thereafter 253,749 $ 875,240 Leasing as a Lessee 2000 M Street, an office property in Washington, DC, is subject to an operating ground lease with a remaining term of 52 years . Rental payments under this lease are subject to percentage rent variable payments, which are not included as part of our measurement of straight-line rental expense. We recognized variable rental payments of $0.3 million during each of the 2019 and 2018 Quarters and $0.9 million and $0.8 million during 2019 and 2018 Periods, respectively. Upon adoption of ASU 2016-02, we recognized a right of use asset (included in Income producing property) and lease liability (included in Accounts payable and other liabilities) of $4.2 million . We used a discount rate of approximately 5.9% , which was derived from our assessment of securitized rates for similar assets and credit quality. We recognized $0.1 million and $0.2 million of right-of-use and lease liability amortization during the 2019 Quarter and 2019 Period, respectively. In addition, as of January 1, 2019 we reclassified the associated below-market ground lease intangible asset of $10.0 million , net of accumulated amortization of $2.1 million , from Prepaid expenses and other assets to Income producing property on our consolidated balance sheets. The following table sets forth the undiscounted cash flows of our scheduled obligations for future minimum payments on our operating ground lease as of September 30, 2019 and a reconciliation of those cash flows to the operating lease liability as of September 30, 2019 (in thousands): 2019 $ 65 2020 260 2021 260 2022 260 2023 260 2024 260 Thereafter 11,895 13,260 Imputed interest (9,229 ) Lease liability $ 4,031

Unsecured Line of Credit Payabl

Unsecured Line of Credit Payable	9 Months Ended
	Sep. 30, 2019
Debt Disclosure [Abstract]
Unsecured Line of Credit Payable	UNSECURED LINE OF CREDIT PAYABLE During the first quarter of 2018, we entered into an amended and restated credit agreement (“Credit Agreement”) which provides for a $700.0 million unsecured revolving credit facility (“Revolving Credit Facility”), the continuation of an existing $150.0 million unsecured term loan (“2015 Term Loan”) and an additional $250.0 million unsecured term loan (“2018 Term Loan”). The Revolving Credit Facility has a four -year term ending in March 2022 , with two six -month extension options. The Credit Agreement has an accordion feature that allows us to increase the aggregate facility to $1.5 billion , subject to the lenders’ agreement to provide additional revolving loan commitments or term loans. The Revolving Credit Facility bears interest at a rate of either one month LIBOR plus a margin ranging from 0.775% to 1.55% or the base rate plus a margin ranging from 0.0% to 0.55% (in each case depending upon WashREIT’s credit rating). The base rate is the highest of the administrative agent’s prime rate, the federal funds rate plus 0.50% and the LIBOR market index rate plus 1.0% . In addition, the Revolving Credit Facility requires the payment of a facility fee ranging from 0.10% to 0.30% (depending on WashREIT’s credit rating) on the $700.0 million committed revolving loan capacity, without regard to usage. As of September 30, 2019 , the interest rate on the Revolving Credit Facility is one month LIBOR plus 1.00% , the one month LIBOR is 2.02% and the facility fee is 0.20% . All outstanding advances for the Revolving Credit Facility are due and payable upon maturity in March 2022, unless extended pursuant to one or both of the two six-month extension options. Interest only payments are due and payable generally on a monthly basis. The 2018 Term Loan increases and replaces the $150.0 million unsecured term loan, initially entered into on July 22, 2016 (“2016 Term Loan”), that was scheduled to mature in July 2023. The 2018 Term Loan is scheduled to mature in July 2023 and bears interest at a rate of either one month LIBOR plus a margin ranging from 0.85% to 1.75% or the base rate plus a margin ranging from 0.0% to 0.75% (in each case depending upon WashREIT’s credit rating). We used the $100.0 million of additional proceeds from the 2018 Term Loan primarily to repay outstanding borrowings on the Revolving Credit Facility. We had previously used interest rate derivatives to effectively fix the interest rate of the 2016 Term Loan. These interest rate derivatives now effectively fix the interest rate on a $150.0 million portion of the 2018 Term Loan at 2.31% . In March 2018, we entered into interest rate derivatives that commenced on June 29, 2018 to effectively fix the interest rate on the remaining $100.0 million of the 2018 Term Loan at 3.71% . The 2018 Term Loan has an all-in fixed interest rate of 2.87% . The amount of the Revolving Credit Facility’s unsecured line of credit unused and available at September 30, 2019 is as follows (in thousands): Committed capacity $ 700,000 Borrowings outstanding (211,000 ) Unused and available $ 489,000 We executed borrowings and repayments on the Revolving Credit Facility during the 2019 Period as follows (in thousands): Balance, December 31, 2018 $ 188,000 Borrowings 659,000 Repayments (636,000 ) Balance, September 30, 2019 $ 211,000

Notes Payable

Notes Payable	9 Months Ended
	Sep. 30, 2019
Debt Disclosure [Abstract]
Notes Payable	NOTES PAYABLE On April 30, 2019, we entered into a six-month, $450.0 million unsecured term loan facility (“2019 Term Loan”), maturing on October 30, 2019 with an option to extend for a six-month period. The 2019 Term Loan bore interest, at WashREIT’s option, at a rate of either LIBOR plus a margin ranging from 0.75% to 1.65% or the base rate plus a margin ranging 0.0% to 0.65% (in each case depending upon WashREIT’s credit rating). The base rate is the highest of the administrative agent’s prime rate, the federal funds rate plus 0.50% and the daily one-month LIBOR rate plus 1.0% . At WashREIT’s election, the 2019 Term Loan had an interest rate of one-week LIBOR plus 100 basis points, based on WashREIT’s current unsecured debt rating. The 2019 Term Loan was used to fund the acquisition of the Assembly Portfolio (see note 3 ) . During the 2019 Quarter, we repaid the $450.0 million of borrowings on the 2019 Term Loan with proceeds from the sale of the Retail Portfolio (see note 3 ).

Derivative Instruments

Derivative Instruments	9 Months Ended
	Sep. 30, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments	DERIVATIVE INSTRUMENTS On September 15, 2015 , we entered into two interest rate swap arrangements with a total notional amount of $150.0 million to swap the floating interest rate under the $150.0 million 2015 Term Loan (see note 5 ) to an all-in fixed interest rate of 2.72% starting on October 15, 2015 and extending until the maturity of the 2015 Term Loan on March 15, 2021 . On July 22, 2016 , we entered into two forward interest rate swap arrangements with a total notional amount of $150.0 million to swap the floating interest rate under the $150.0 million 2016 Term Loan (see note 5 ) to an all-in fixed interest rate of 2.86% starting on March 31, 2017 and extending until the maturity of the 2016 Term Loan on July 21, 2023 . On March 29, 2018, we entered into the $250.0 million 2018 Term Loan (see note 5 ) maturing on July 21, 2023, which increased and replaced the 2016 Term Loan. The interest rate swap arrangements that had effectively fixed the 2016 Term Loan now effectively fix the interest rate on a $150.0 million portion of the 2018 Term Loan at 2.31% . On March 29, 2018, we entered into four interest rate swap arrangements with a total notional amount of $100.0 million to effectively fix the interest rate on the remaining $100.0 million of the 2018 Term Loan at 3.71% , that commenced on June 29, 2018 and extending until the maturity of the 2018 Term Loan on July 21, 2023 . The $250.0 million 2018 Term Loan has an all-in fixed interest rate of 2.87% . The interest rate swaps qualify as cash flow hedges and are recorded at fair value in accordance with GAAP, based on discounted cash flow methodologies and observable inputs. We record the total change in fair value of the interest rate swap arrangements associated with our cash flow hedges in other comprehensive (loss) income. The resulting unrealized (loss) gain of the cash flow hedges was the only activity in other comprehensive (loss) income during the periods presented in our consolidated financial statements. We assess the effectiveness of our cash flow hedges both at inception and on an ongoing basis. The cash flow hedges were highly effective for all periods presented. The fair values of the interest rate swaps as of September 30, 2019 and December 31, 2018 , are as follows (in thousands): Fair Value Derivative Assets (Liabilities) Derivative Instrument Aggregate Notional Amount Effective Date Maturity Date September 30, 2019 December 31, 2018 Interest rate swaps $ 150,000 October 15, 2015 March 15, 2021 $ (140 ) $ 2,720 Interest rate swaps 150,000 March 31, 2017 July 21, 2023 1,007 7,918 Interest rate swaps 100,000 June 29, 2018 July 21, 2023 (4,526 ) (799 ) $ 400,000 $ (3,659 ) $ 9,839 We record interest rate swaps on our consolidated balance sheets within prepaid expenses and other assets when in a net asset position and within accounts payable and other liabilities when in a net liability position. The interest rate swaps have been effective since inception. The net gains or losses on the effective swaps are recognized in other comprehensive (loss) income, as follows (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 Unrealized (loss) gain on interest rate swaps $ (2,387 ) $ 1,474 $ (13,498 ) $ 7,762 Amounts reported in accumulated other comprehensive income related to derivatives will be reclassified to interest expense as interest payments are made on our variable-rate debt. During the next twelve months, we estimate that an additional $0.3 million will be reclassified as an increase to interest expense. We have agreements with each of our derivative counterparties that contain a provision whereby we could be declared in default on our derivative obligations if repayment of the underlying indebtedness is accelerated by the lender due to our default on the indebtedness. As of September 30, 2019 , the fair value of derivative assets, including accrued interest, was $1.0 million , and the fair value of the derivative liabilities, including accrued interest, was $4.7 million . As of September 30, 2019 , we have not posted any collateral related to these agreements. Derivative instruments expose us to credit risk in the event of non-performance by the counterparty under the terms of the interest rate hedge agreements. We believe that we minimize our credit risk on these transactions by dealing with major, creditworthy financial institutions. We monitor the credit ratings of counterparties and our exposure to any single entity, thus minimizing our credit risk concentration.

Fair Value Disclosures

Fair Value Disclosures	9 Months Ended
	Sep. 30, 2019
Fair Value Disclosures [Abstract]
Fair Value Disclosures	FAIR VALUE DISCLOSURES Assets and Liabilities Measured at Fair Value For assets and liabilities measured at fair value on a recurring basis, quantitative disclosures about the fair value measurements are required to be disclosed separately for each major category of assets and liabilities, as follows: Level 1: Quoted prices in active markets for identical assets Level 2: Significant other observable inputs Level 3: Significant unobservable inputs The only assets or liabilities we had at September 30, 2019 and December 31, 2018 that are recorded at fair value on a recurring basis are the assets held in the Supplemental Executive Retirement Plan (“SERP”), which primarily consist of investments in mutual funds, and the interest rate swaps (see note 7 ). We base the valuations related to the SERP on assumptions derived from significant other observable inputs and accordingly these valuations fall into Level 2 in the fair value hierarchy. The 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 interest rate swap. This analysis reflects the contractual terms of the interest rate swaps, including the period to maturity, and uses observable market-based inputs, including interest rate curves and implied volatilities. The fair values of interest rate swaps are determined using the market standard methodology of netting the discounted future fixed cash payments (or receipts) and the discounted expected variable cash receipts (or payments). The variable cash payments (or receipts) are based on an expectation of future interest rates (forward curves) derived from observable market interest rate curves. To comply with the provisions of ASC 820, Fair Value Measurement , we incorporate credit valuation adjustments in the fair value measurements to appropriately reflect both our own nonperformance risk and the respective counterparty’s nonperformance risk. These credit valuation adjustments were concluded to not be significant inputs for the fair value calculations for the periods presented. In adjusting the fair value of our derivative contracts for the effect of nonperformance risk, we have considered the impact of netting and any applicable credit enhancements, such as the posting of collateral, thresholds, mutual puts and guarantees. The valuation of interest rate swaps fall into Level 2 in the fair value hierarchy. The fair values of these assets and liabilities at September 30, 2019 and December 31, 2018 were as follows (in thousands): September 30, 2019 December 31, 2018 Fair Value Level 1 Level 2 Level 3 Fair Value Level 1 Level 2 Level 3 Assets: SERP $ 1,636 $ — $ 1,636 $ — $ 1,364 $ — $ 1,364 $ — Interest rate swaps 1,007 — 1,007 — 10,638 — 10,638 — Liabilities: Interest rate swaps $ (4,666 ) $ — $ (4,666 ) $ — $ (799 ) $ — $ (799 ) $ — Financial Assets and Liabilities Not Measured at Fair Value The following disclosures of estimated fair value were determined by management using available market information and established valuation methodologies, including discounted cash flow models. Many of these estimates involve significant judgment. The estimated fair value disclosed may not necessarily be indicative of the amounts we could realize on disposition of the financial instruments. The use of different market assumptions or estimation methodologies could have an effect on the estimated fair value amounts. In addition, fair value estimates are made at a point in time and thus, estimates of fair value subsequent to September 30, 2019 may differ significantly from the amounts presented. The valuations of cash and cash equivalents and restricted cash fall into Level 1 in the fair value hierarchy and the valuations of debt instruments fall into Level 3 in the fair value hierarchy. As of September 30, 2019 and December 31, 2018 , the carrying values and estimated fair values of our financial instruments were as follows (in thousands): September 30, 2019 December 31, 2018 Carrying Value Fair Value Carrying Value Fair Value Cash and cash equivalents $ 12,931 $ 12,931 $ 6,016 $ 6,016 Restricted cash 1,578 1,578 1,624 1,624 Mortgage notes payable, net 47,319 48,259 48,277 48,368 Line of credit 211,000 211,000 188,000 188,000 Notes payable, net 996,455 1,025,248 995,397 1,015,210 The mortgage note secured by Olney Village Center was reclassified to Other liabilities related to properties held for sale prior to its prepayment during the 2019 Quarter (see note 3 ). As of September 30, 2019 and December 31, 2018 , the carrying values and estimated fair values of the mortgage note secured by Olney Village Center were as follows (in thousands): September 30, 2019 December 31, 2018 Carrying Value Fair Value Carrying Value Fair Value Mortgage notes payable, net $ — $ — $ 11,515 $ 12,030

Stock Based Compensation

Stock Based Compensation	9 Months Ended
	Sep. 30, 2019
Share-based Payment Arrangement [Abstract]
Stock Based Compensation	STOCK BASED COMPENSATION WashREIT maintains short-term (“STIP”) and long-term (“LTIP”) incentive plans that allow for stock based awards to officers and non-officer employees. Stock based awards are provided to officers and non-officer employees, as well as trustees, under the Washington Real Estate Investment Trust 2016 Omnibus Incentive Plan which allows for awards in the form of restricted shares, restricted share units, options and other awards up to an aggregate of 2,400,000 shares over the ten -year period in which the plan will be in effect. Restricted share units are converted into shares of our stock upon full vesting through the issuance of new shares. During the first quarter of 2019, we amended the STIP for executive officers and the STIP and LTIP for non-executive officers and staff to replace the use of core funds available for distribution as a performance metric and performance goal, respectively, with a Leasing Target performance metric and performance goal. Leasing Target means the aggregate annual leasing target amount (measured in square feet of leasing space) as approved by the compensation committee of our board of trustees for a given performance period and performance year, respectively, with regards to our office and retail properties. The amendments became effective as of March 18, 2019 for performance periods beginning on or after January 1, 2019. Total Compensation Expense Total compensation expense recognized in the consolidated financial statements for all outstanding share based awards was $1.7 million for both the 2019 Quarter and 2018 Quarter, and $6.3 million and $5.1 million for the 2019 Period and 2018 Period, respectively. Restricted Share Awards The total fair values of restricted share awards vested was $1.7 million and $1.1 million for the 2019 Period and 2018 Period, respectively. The total unvested restricted share awards at September 30, 2019 was 428,840 shares, which had a weighted average grant date fair value of $28.08 per share. As of September 30, 2019 , the total compensation cost related to unvested restricted share awards was $7.0 million , which we expect to recognize over a weighted average period of 24

Earnings per Common Share

Earnings per Common Share	9 Months Ended
	Sep. 30, 2019
Earnings Per Share [Abstract]
Earnings per Common Share	EARNINGS PER COMMON SHARE We determine “Basic earnings per share” using the two-class method as our unvested restricted share awards and units have non-forfeitable rights to dividends, and are therefore considered participating securities. We compute basic earnings per share by dividing net income attributable to the controlling interest less the allocation of undistributed earnings to unvested restricted share awards and units by the weighted-average number of common shares outstanding for the period. We also determine “Diluted earnings per share” as the more dilutive of the two-class method or the treasury stock method with respect to the unvested restricted share awards. We further evaluate any other potentially dilutive securities at the end of the period and adjust the basic earnings per share calculation for the impact of those securities that are dilutive. Our dilutive earnings per share calculation includes the dilutive impact of operating partnership units under the if-converted method and our share based awards with performance conditions prior to the grant date and all market condition awards under the contingently issuable method. The computations of basic and diluted earnings per share for the three and nine months ended September 30, 2019 and 2018 were as follows (in thousands, except per share data): Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 Numerator: (Loss) income from continuing operations $ (8,432 ) $ (547 ) $ (25,066 ) $ 1,457 Allocation of losses (earnings) to unvested restricted share awards to continuing operations 47 (144 ) 118 (432 ) Adjusted (loss) income from continuing operations attributable to the controlling interests (8,385 ) (691 ) (24,948 ) 1,025 Income from discontinued operations 341,202 6,440 354,418 18,485 Allocation of earnings to unvested restricted share awards to discontinued operations (1,841 ) — (1,870 ) — Adjusted income from discontinuing operations 339,361 6,440 352,548 18,485 Adjusted net income attributable to the controlling interests $ 330,976 $ 5,749 $ 327,600 $ 19,510 Denominator: Weighted average shares outstanding – basic 79,981 79,076 79,933 78,695 Effect of dilutive securities: Operating partnership units — — — 12 Employee restricted share awards — — — 95 Weighted average shares outstanding – diluted 79,981 79,076 79,933 78,802 Earnings per common share, basic: Continuing operations $ (0.10 ) $ (0.01 ) $ (0.31 ) $ 0.01 Discontinued operations 4.24 0.08 4.41 0.23 Basic net income attributable to the controlling interests per common share (1) $ 4.14 $ 0.07 $ 4.10 $ 0.25 Earnings per common share, diluted: Continuing operations $ (0.10 ) $ (0.01 ) $ (0.31 ) $ 0.01 Discontinued operations 4.24 0.08 4.41 0.23 Diluted net income attributable to the controlling interests per common share (1) $ 4.14 $ 0.07 $ 4.10 $ 0.25 Dividends declared per common share $ 0.30 $ 0.30 $ 0.90 $ 0.90 (1) Earnings per share may not sum due to rounding.

Segment Information

Segment Information	9 Months Ended
	Sep. 30, 2019
Segment Reporting [Abstract]
Segment Information	SEGMENT INFORMATION We have two reportable segments: office and multifamily. Office properties provide office space for various types of businesses and professions. Multifamily properties provide rental housing for individuals and families throughout the greater Washington metro region. We previously had a retail segment consisting of grocery store-anchored neighborhood centers that include other small shop tenants and regional power centers with several junior box tenants. During the second quarter of 2019, we executed purchase and sale agreements for the sale of eight retail properties, which properties were ultimately sold during the 2019 Quarter (see note 3 ). These properties met the criteria for classification as held for sale as of June 30, 2019 and are classified as discontinued operations. The remaining retail properties do not meet the qualitative or quantitative criteria for a reportable segment, and are classified within “Corporate and other” on our segment disclosure tables. The dispositions of the eight retail properties are part of a strategic shift away from the retail sector. This strategic shift simplified our portfolio to two reportable segments (office and multifamily) and reduced our exposure to future retail lease expirations. We evaluate performance based upon net operating income from the combined properties in each segment. Our reportable operating segments are consolidations of similar properties. GAAP requires that segment disclosures present the measure(s) used by the chief operating decision maker for purposes of assessing each segment’s performance. Net operating income is a key measurement of our segment profit and loss. Net operating income is defined as real estate rental revenue less real estate expenses. The following tables present revenues, net operating income, capital expenditures and total assets for the three and nine months ended September 30, 2019 and 2018 from these segments, and reconcile net operating income of reportable segments to net income (loss) attributable to the controlling interests as reported (in thousands): Three Months Ended September 30, 2019 Office Multifamily Corporate and Other (1) Consolidated Real estate rental revenue $ 39,810 $ 35,790 $ 4,659 $ 80,259 Real estate expenses 15,148 14,232 1,312 30,692 Net operating income $ 24,662 $ 21,558 $ 3,347 $ 49,567 Depreciation and amortization (37,340 ) General and administrative expenses (6,045 ) Lease origination expenses (416 ) Interest expense (14,198 ) Discontinued operations: Income from operations of properties sold or held for sale 2,942 Gain on sale of real estate 339,024 Loss on extinguishment of debt (764 ) Net income 332,770 Less: Net income attributable to noncontrolling interests in subsidiaries — Net income attributable to the controlling interests $ 332,770 Capital expenditures $ 6,039 $ 5,742 $ 369 $ 12,150 Total assets $ 1,191,838 $ 1,333,146 $ 150,092 $ 2,675,076 Three Months Ended September 30, 2018 Office Multifamily Corporate and Other (1) Consolidated Real estate rental revenue $ 42,438 $ 23,953 $ 4,610 $ 71,001 Real estate expenses 15,368 9,297 1,323 25,988 Net operating income $ 27,070 $ 14,656 $ 3,287 $ 45,013 Depreciation and amortization (27,951 ) General and administrative expenses (5,267 ) Interest expense (12,342 ) Discontinued operations: Income from operations of properties sold or held for sale 6,440 Net income 5,893 Less: Net income attributable to noncontrolling interests in subsidiaries — Net income attributable to the controlling interests $ 5,893 Capital expenditures $ 8,537 $ 5,708 $ 1,259 $ 15,504 Total assets $ 1,246,026 $ 785,397 $ 385,094 $ 2,416,517 Nine Months Ended September 30, 2019 Office Multifamily Corporate and Other (1) Consolidated Real estate rental revenue $ 124,164 $ 90,012 $ 14,337 $ 228,513 Real estate expenses 45,937 34,928 4,104 84,969 Net operating income $ 78,227 $ 55,084 $ 10,233 $ 143,544 Depreciation and amortization (97,441 ) General and administrative (18,517 ) Leasing origination expense (1,286 ) Interest expense (41,946 ) Real estate impairment (8,374 ) Loss on sale of real estate (1,046 ) Discontinued operations: Income from operations of properties sold or held for sale 16,158 Gain on sale of real estate 339,024 Loss on extinguishment of debt (764 ) Net income 329,352 Less: Net income attributable to noncontrolling interests in subsidiaries — Net income attributable to the controlling interests $ 329,352 Capital expenditures $ 16,347 $ 12,841 $ 1,717 $ 30,905 Nine Months Ended September 30, 2018 Office Multifamily Corporate and Other (1) Consolidated Real estate rental revenue $ 135,258 $ 71,168 $ 13,564 $ 219,990 Real estate expenses 48,031 28,012 3,895 79,938 Net operating income $ 87,227 $ 43,156 $ 9,669 $ 140,052 Depreciation and amortization (83,134 ) General and administrative (16,737 ) Interest expense (38,155 ) Gain on sale of real estate 2,495 Real estate impairment (1,886 ) Loss on extinguishment of debt (1,178 ) Discontinued operations: Income from operations of properties sold or held for sale 18,485 Net income 19,942 Less: Net income attributable to noncontrolling interests in subsidiaries — Net income attributable to the controlling interests $ 19,942 Capital expenditures $ 17,926 $ 13,068 $ 3,069 $ 34,063 (1) Net operating income includes the retail properties not classified as discontinued operations: Takoma Park, Westminster, Concord Center, Chevy Chase Metro Plaza, 800 S. Washington Street, Randolph Shopping Center, Montrose Shopping Center and Spring Valley Village, and total assets and capital expenditures include all retail properties, including those classified as discontinued operations.

Shareholders' Equity

Shareholders' Equity	9 Months Ended
	Sep. 30, 2019
Equity [Abstract]
Shareholders' Equity	SHAREHOLDERS' EQUITY On May 4, 2018, we entered into eight separate equity distribution agreements (collectively, the “Equity Distribution Agreements”) with each of Wells Fargo Securities, LLC, BNY Mellon Capital Markets, LLC, Capital One Securities, Inc., Citigroup Global Markets Inc., Goldman Sachs & Co. LLC, J.P. Morgan Securities LLC, KeyBanc Capital Markets Inc. and SunTrust Robinson Humphrey, Inc. relating to the issuance of up to $250.0 million of our common shares from time to time. Issuances of our common shares are made at market prices prevailing at the time of issuance. We may use net proceeds from the issuance of common shares under this program for general corporate purposes, including, without limitation, working capital, the acquisition, renovation, expansion, improvement, development or redevelopment of income producing properties or the repayment of debt. During the 2019 Quarter and Period, we issued 0.1 million common shares at a weighted average price of $27.52 for net proceeds of $3.7 million . During the 2018 Quarter and Period, we issued 1.2 million common shares at a weighted average price of $31.18 for net proceeds of $35.5 million . We have a dividend reinvestment program, whereby shareholders may use their dividends and optional cash payments to purchase common shares. The common shares sold under this program may either be common shares issued by us or common shares purchased in the open market. Net proceeds under this program were used for general corporate purposes. Our issuances and net proceeds on the dividend reinvestment program were as follows (in thousands, except per share data): Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 Issuance of common shares 64 18 128 74 Weighted average price per share $ 27.67 $ 30.68 $ 26.97 $ 29.29 Net proceeds $ 1,757 $ 565 $ 3,430 $ 1,811

Summary of Significant Accoun_2

Summary of Significant Accounting Policies and Basis of Presentations (Policies)	9 Months Ended
	Sep. 30, 2019
Accounting Policies [Abstract]
New Accounting Pronouncements	Pronouncements Adopted Standard/Description Effective Date and Adoption Considerations Effect on Financial Statements or Other significant Matters ASU 2016-02, Leases (Topic 842) (“ASU 2016-02”). This standard amends existing lease accounting standards for both lessees and lessors. Lessees must classify most leases as either finance or operating leases. For lease contracts, or contracts with an embedded lease, with a duration of more than one year in which we are the lessee, the present value of future lease payments are recognized on our consolidated balance sheets as a right-of-use asset and a corresponding lease liability. Leases (Topic 842) - Targeted Improvements (“ASU 2018-11”), which provides lessors optional transition relief from implementing this aspect of ASU 2016-02 if the following criteria are met: (1) both components have the same timing and pattern of revenue and (2) if accounted for separately, both components would be classified as an operating lease. We adopted the new standard as of January 1, 2019. We adopted ASU 2016-02 as of January 1, 2019 using the modified retrospective approach and by applying the transitional practical expedients noted below. Under the modified retrospective approach, we recognized a cumulative effect adjustment of $0.9 million to retained earnings as of January 1, 2019 (see note 4 for further discussion of the impact of adoption on our consolidated financial statements). We did not elect the hindsight expedient, which would have allowed us to reevaluate lease terms in calculating lease liabilities as part of adoption. Under ASU 2018-11, the FASB offered optional transition relief, if elected as a package, and applied consistently by an entity to all of its leases. Accordingly, upon adoption we elected, as a package, the practical expedients for all leases as follows: (1) we will not reassess whether any expired or existing contracts are or contain leases, (2) we will not reassess the lease classification for any expired or existing leases, and (3) we will not reassess initial direct costs for any existing leases. Pronouncements Not Yet Adopted Standard/Description Effective Date and Adoption Considerations Effect on Financial Statements or Other significant Matters ASU 2016-13, Measurement of Credit Losses on Financial Instruments . This standard requires financial assets measured at an amortized cost basis, including trade receivables, to be presented at the net amount expected to be collected. The new standard is effective for public entities for fiscal years beginning after December 15, 2019 and for interim periods therein, with adoption one year earlier permitted. We are currently evaluating the impact the new standard may have on our consolidated financial statements. ASU 2018-15, Intangibles - Goodwill and Other - Internal-Use Software . This standard requires a customer in a cloud computing arrangement that is a service contract to follow the internal-use software guidance to determine which implementation costs to capitalize as assets. The standard is effective for public entities for fiscal years beginning after December 31, 2019 and for interim periods therein, with early adoption permitted. We are currently evaluating the impact the new standard may have on our consolidated financial statements.
Principles of Consolidation and Basis of Presentation	Principles of Consolidation and Basis of Presentation The accompanying unaudited consolidated financial statements include the consolidated accounts of WashREIT, our majority-owned subsidiaries and entities in which WashREIT has a controlling interest. All intercompany balances and transactions have been eliminated in consolidation.
Basis of Accounting	We have prepared the accompanying unaudited financial statements pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”). Certain information and note disclosures normally included in annual financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to those rules and regulations, although we believe that the disclosures made are adequate to make the information presented not misleading. In addition, in the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation of the results for the periods presented have been included. These unaudited financial statements should be read in conjunction with the financial statements and notes included in our Annual Report on Form 10-K for the year ended December 31, 2018 . Within these notes to the financial statements, we refer to the three months ended September 30, 2019 and September 30, 2018 as the “ 2019 Quarter” and the “ 2018 Quarter,” respectively, and the nine months ended September 30, 2019 and September 30, 2018 as the “ 2019 Period” and the “ 2018 Period,” respectively.
Discontinued Operations	Discontinued Operations We classify properties as held for sale when they meet the necessary criteria, which include: (a) senior management commits to a plan to sell the assets, (b) the assets are available for immediate sale in their present condition subject only to terms that are usual and customary for sales of such assets, (c) an active program to locate a buyer and other actions required to complete the plan to sell the assets have been initiated, (d) the sale of the assets is probable, and transfer of the assets is expected to qualify for recognition as a completed sale, within one year, (e) the assets are being actively marketed for sale at a price that is reasonable in relation to its current fair value and (f) actions required to complete the plan indicate that it is unlikely that significant changes to the plan will be made or that the plan will be withdrawn. Depreciation on these properties is discontinued at the time they are classified as held for sale, but operating revenues, operating expenses and interest expense continue to be recognized until the date of sale. Revenues and expenses of properties that are either sold or classified as held for sale are presented as discontinued operations for all periods presented in the consolidated statements of operations if the dispositions represent a strategic shift that has (or will have) a major effect on our operations and financial results. Interest on debt that can be identified as specifically attributed to these properties is included in discontinued operations. If the dispositions do not represent a strategic shift that has (or will have) a major effect on our operations and financial results, then the revenues and expenses of the properties that are classified as sold or held for sale are presented as continuing operations in the consolidated statements of operations for all periods presented.
Restricted Cash	Restricted Cash Restricted cash includes funds escrowed for tenant security deposits, real estate tax, insurance and mortgage escrows and escrow deposits required by lenders on certain of our properties to be used for future building renovations or tenant improvements.
Use of Estimates in the Financial Statements	Use of Estimates in the Financial Statements The preparation of financial statements in conformity with GAAP requires management to make certain estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.

Real Estate (Tables)

Real Estate (Tables)	9 Months Ended
	Sep. 30, 2019
Real Estate [Abstract]
Schedule of Real Estate Property Acquired	We acquired the following properties during the 2019 Period: Acquisition Date Property Type # of units (unaudited) Contract Purchase Price (in thousands) April 30, 2019 Assembly Portfolio - Virginia (1) Multifamily 1,685 $ 379,100 June 27, 2019 Assembly Portfolio - Maryland (2) Multifamily 428 82,070 July 23, 2019 Cascade at Landmark Multifamily 277 69,750 2,390 $ 530,920 (1) Consists of Assembly Alexandria, Assembly Manassas, Assembly Dulles, Assembly Leesburg, and Assembly Herndon. (2) Consists of Assembly Germantown and Assembly Watkins Mill. The Assembly Portfolio - Virginia and Assembly Portfolio - Maryland properties are collectively the “Assembly Portfolio.”
Schedule of Revenue and Earnings of Acquired Properties	The results of operations from the 2019 acquisitions are included in the consolidated statements of operations as of their acquisition dates and are as follows: Three Months Ended September 30, 2019 Nine Months Ended September 30, 2019 Real estate rental revenue $ 11,013 $ 16,467 Net loss (4,698 ) (8,179 )
Schedule of Cost of Acquisitions	The total cost of the 2019 acquisitions was as follows (in thousands): Assembly Portfolio Cascade at Landmark Total Contract purchase price $ 461,170 $ 69,750 $ 530,920 Credit to buyer (2,252 ) — (2,252 ) Capitalized acquisition costs 2,362 498 2,860 Total $ 461,280 $ 70,248 $ 531,528
Schedule of Acquisition Asset Valuation	We have recorded the total cost of the 2019 acquisitions as follows (in thousands): Land $ 92,391 Building 423,663 Absorption costs 15,474 Total $ 531,528
Schedule of Properties Held-for-Sale or Sold and Discontinued Operations	We sold the following properties during 2019 and 2018: Disposition Date Property Name Property Type Rentable Square Feet Contract Sales Price (Loss) Gain on Sale June 26, 2019 Quantico Corporate Center (1) Office 272,000 $ 33,000 $ (1,046 ) July 23, 2019 Shopping Center Portfolio (2) Retail 800,000 485,250 333,023 August 21, 2019 Frederick Crossing and Frederick County Square Retail 520,000 57,500 9,507 August 27, 2019 Centre at Hagerstown Retail 330,000 23,500 (3,506 ) Total 2019 1,922,000 $ 599,250 $ 337,978 January 19, 2018 Braddock Metro Center Office 356,000 $ 93,000 $ — June 28, 2018 2445 M Street Office 292,000 101,600 2,495 Total 2018 648,000 $ 194,600 $ 2,495 (1) Consists of 925 and 1000 Corporate Drive. (2) Consists of five retail properties: Gateway Overlook, Wheaton Park, Olney Village Center, Bradlee Shopping Center and Shoppes of Foxchase. The results of the Retail Portfolio are classified as discontinued operations and are summarized as follows (amounts in thousands, except for share data): Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 Real estate rental revenue $ 4,126 $ 11,500 $ 28,200 $ 33,998 Real estate expenses (1,095 ) (2,582 ) (6,803 ) (8,036 ) Depreciation and amortization (59 ) (2,321 ) (4,926 ) (6,985 ) Interest expense (30 ) (157 ) (313 ) (492 ) Loss on extinguishment of debt (764 ) — (764 ) — Gain on sale of real estate 339,024 — 339,024 — Income from discontinued operations $ 341,202 $ 6,440 $ 354,418 $ 18,485 Basic net income per share $ 4.24 $ 0.08 $ 4.41 $ 0.23 Diluted net income per share $ 4.24 $ 0.08 $ 4.41 $ 0.23 Capital expenditures $ — $ 1,020 $ 809 $ 1,834 All assets related to the Retail Portfolio were sold as of September 30, 2019 . As of December 31, 2018 , assets related to the Retail Portfolio were as follows (in thousands): December 31, 2018 Land $ 88,087 Income producing property 216,577 304,664 Accumulated depreciation and amortization (101,254 ) Income producing property, net 203,410 Rents and other receivables 9,898 Prepaid expenses and other assets 8,653 Total assets $ 221,961 All liabilities related to the Retail Portfolio were sold as of September 30, 2019 . As of December 31, 2018 , liabilities related to the Retail Portfolio were as follows (in thousands): December 31, 2018 Mortgage notes payable, net $ 11,515 Accounts payable and other liabilities 1,620 Advance rents 1,771 Tenant security deposits 612 Liabilities related to properties sold or held for sale $ 15,518

Lease Accounting (Tables)

Lease Accounting (Tables)	9 Months Ended
	Sep. 30, 2019
Leases [Abstract]
Schedule of Future Minimum Rental Income	As of September 30, 2019 , non-cancelable commercial operating leases provide for future minimum rental income from continuing operations as follows (in thousands). Apartment leases are not included as the terms are generally for one year or less. 2019 $ 38,665 2020 153,366 2021 136,394 2022 122,558 2023 105,126 Thereafter 396,401 $ 952,510
Schedule of Future Minimum Rental Income at Prior Year End	As of December 31, 2018, non-cancelable commercial operating leases provide for future minimum rental income from continuing operations as follows (in thousands): 2019 $ 154,260 2020 143,566 2021 125,008 2022 108,688 2023 89,969 Thereafter 253,749 $ 875,240
Schedule of Obligations for Future Minimum Payments on Operating Ground Lease	The following table sets forth the undiscounted cash flows of our scheduled obligations for future minimum payments on our operating ground lease as of September 30, 2019 and a reconciliation of those cash flows to the operating lease liability as of September 30, 2019 (in thousands): 2019 $ 65 2020 260 2021 260 2022 260 2023 260 2024 260 Thereafter 11,895 13,260 Imputed interest (9,229 ) Lease liability $ 4,031

Unsecured Line of Credit Paya_2

Unsecured Line of Credit Payable (Tables)	9 Months Ended
	Sep. 30, 2019
Debt Disclosure [Abstract]
Schedule of Revolving Credit Facility	The amount of the Revolving Credit Facility’s unsecured line of credit unused and available at September 30, 2019 is as follows (in thousands): Committed capacity $ 700,000 Borrowings outstanding (211,000 ) Unused and available $ 489,000 We executed borrowings and repayments on the Revolving Credit Facility during the 2019 Period as follows (in thousands): Balance, December 31, 2018 $ 188,000 Borrowings 659,000 Repayments (636,000 ) Balance, September 30, 2019 $ 211,000

Derivative Instruments (Tables)

Derivative Instruments (Tables)	9 Months Ended
	Sep. 30, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Fair Values of Interest Rate Swaps	The fair values of the interest rate swaps as of September 30, 2019 and December 31, 2018 , are as follows (in thousands): Fair Value Derivative Assets (Liabilities) Derivative Instrument Aggregate Notional Amount Effective Date Maturity Date September 30, 2019 December 31, 2018 Interest rate swaps $ 150,000 October 15, 2015 March 15, 2021 $ (140 ) $ 2,720 Interest rate swaps 150,000 March 31, 2017 July 21, 2023 1,007 7,918 Interest rate swaps 100,000 June 29, 2018 July 21, 2023 (4,526 ) (799 ) $ 400,000 $ (3,659 ) $ 9,839
Schedule of Net Gains or Losses on the Effective Swaps	The net gains or losses on the effective swaps are recognized in other comprehensive (loss) income, as follows (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 Unrealized (loss) gain on interest rate swaps $ (2,387 ) $ 1,474 $ (13,498 ) $ 7,762

Fair Value Disclosures (Tables)

Fair Value Disclosures (Tables)	9 Months Ended
	Sep. 30, 2019
Fair Value Disclosures [Abstract]
Schedule of Assets and Liabilities Measured at Fair Value	The fair values of these assets and liabilities at September 30, 2019 and December 31, 2018 were as follows (in thousands): September 30, 2019 December 31, 2018 Fair Value Level 1 Level 2 Level 3 Fair Value Level 1 Level 2 Level 3 Assets: SERP $ 1,636 $ — $ 1,636 $ — $ 1,364 $ — $ 1,364 $ — Interest rate swaps 1,007 — 1,007 — 10,638 — 10,638 — Liabilities: Interest rate swaps $ (4,666 ) $ — $ (4,666 ) $ — $ (799 ) $ — $ (799 ) $ —
Schedule of Carrying Values and Estimated Fair Values of Financial Instruments	As of September 30, 2019 and December 31, 2018 , the carrying values and estimated fair values of our financial instruments were as follows (in thousands): September 30, 2019 December 31, 2018 Carrying Value Fair Value Carrying Value Fair Value Cash and cash equivalents $ 12,931 $ 12,931 $ 6,016 $ 6,016 Restricted cash 1,578 1,578 1,624 1,624 Mortgage notes payable, net 47,319 48,259 48,277 48,368 Line of credit 211,000 211,000 188,000 188,000 Notes payable, net 996,455 1,025,248 995,397 1,015,210 September 30, 2019 and December 31, 2018 , the carrying values and estimated fair values of the mortgage note secured by Olney Village Center were as follows (in thousands): September 30, 2019 December 31, 2018 Carrying Value Fair Value Carrying Value Fair Value Mortgage notes payable, net $ — $ — $ 11,515 $ 12,030

Earnings per Common Share (Tabl

Earnings per Common Share (Tables)	9 Months Ended
	Sep. 30, 2019
Earnings Per Share [Abstract]
Schedule of the Computation of Basic and Diluted Earnings per Share	The computations of basic and diluted earnings per share for the three and nine months ended September 30, 2019 and 2018 were as follows (in thousands, except per share data): Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 Numerator: (Loss) income from continuing operations $ (8,432 ) $ (547 ) $ (25,066 ) $ 1,457 Allocation of losses (earnings) to unvested restricted share awards to continuing operations 47 (144 ) 118 (432 ) Adjusted (loss) income from continuing operations attributable to the controlling interests (8,385 ) (691 ) (24,948 ) 1,025 Income from discontinued operations 341,202 6,440 354,418 18,485 Allocation of earnings to unvested restricted share awards to discontinued operations (1,841 ) — (1,870 ) — Adjusted income from discontinuing operations 339,361 6,440 352,548 18,485 Adjusted net income attributable to the controlling interests $ 330,976 $ 5,749 $ 327,600 $ 19,510 Denominator: Weighted average shares outstanding – basic 79,981 79,076 79,933 78,695 Effect of dilutive securities: Operating partnership units — — — 12 Employee restricted share awards — — — 95 Weighted average shares outstanding – diluted 79,981 79,076 79,933 78,802 Earnings per common share, basic: Continuing operations $ (0.10 ) $ (0.01 ) $ (0.31 ) $ 0.01 Discontinued operations 4.24 0.08 4.41 0.23 Basic net income attributable to the controlling interests per common share (1) $ 4.14 $ 0.07 $ 4.10 $ 0.25 Earnings per common share, diluted: Continuing operations $ (0.10 ) $ (0.01 ) $ (0.31 ) $ 0.01 Discontinued operations 4.24 0.08 4.41 0.23 Diluted net income attributable to the controlling interests per common share (1) $ 4.14 $ 0.07 $ 4.10 $ 0.25 Dividends declared per common share $ 0.30 $ 0.30 $ 0.90 $ 0.90 (1) Earnings per share may not sum due to rounding.

Segment Information (Tables)

Segment Information (Tables)	9 Months Ended
	Sep. 30, 2019
Segment Reporting [Abstract]
Schedule of Reconciliation of Net Operating Income of Reportable Segments	The following tables present revenues, net operating income, capital expenditures and total assets for the three and nine months ended September 30, 2019 and 2018 from these segments, and reconcile net operating income of reportable segments to net income (loss) attributable to the controlling interests as reported (in thousands): Three Months Ended September 30, 2019 Office Multifamily Corporate and Other (1) Consolidated Real estate rental revenue $ 39,810 $ 35,790 $ 4,659 $ 80,259 Real estate expenses 15,148 14,232 1,312 30,692 Net operating income $ 24,662 $ 21,558 $ 3,347 $ 49,567 Depreciation and amortization (37,340 ) General and administrative expenses (6,045 ) Lease origination expenses (416 ) Interest expense (14,198 ) Discontinued operations: Income from operations of properties sold or held for sale 2,942 Gain on sale of real estate 339,024 Loss on extinguishment of debt (764 ) Net income 332,770 Less: Net income attributable to noncontrolling interests in subsidiaries — Net income attributable to the controlling interests $ 332,770 Capital expenditures $ 6,039 $ 5,742 $ 369 $ 12,150 Total assets $ 1,191,838 $ 1,333,146 $ 150,092 $ 2,675,076 Three Months Ended September 30, 2018 Office Multifamily Corporate and Other (1) Consolidated Real estate rental revenue $ 42,438 $ 23,953 $ 4,610 $ 71,001 Real estate expenses 15,368 9,297 1,323 25,988 Net operating income $ 27,070 $ 14,656 $ 3,287 $ 45,013 Depreciation and amortization (27,951 ) General and administrative expenses (5,267 ) Interest expense (12,342 ) Discontinued operations: Income from operations of properties sold or held for sale 6,440 Net income 5,893 Less: Net income attributable to noncontrolling interests in subsidiaries — Net income attributable to the controlling interests $ 5,893 Capital expenditures $ 8,537 $ 5,708 $ 1,259 $ 15,504 Total assets $ 1,246,026 $ 785,397 $ 385,094 $ 2,416,517 Nine Months Ended September 30, 2019 Office Multifamily Corporate and Other (1) Consolidated Real estate rental revenue $ 124,164 $ 90,012 $ 14,337 $ 228,513 Real estate expenses 45,937 34,928 4,104 84,969 Net operating income $ 78,227 $ 55,084 $ 10,233 $ 143,544 Depreciation and amortization (97,441 ) General and administrative (18,517 ) Leasing origination expense (1,286 ) Interest expense (41,946 ) Real estate impairment (8,374 ) Loss on sale of real estate (1,046 ) Discontinued operations: Income from operations of properties sold or held for sale 16,158 Gain on sale of real estate 339,024 Loss on extinguishment of debt (764 ) Net income 329,352 Less: Net income attributable to noncontrolling interests in subsidiaries — Net income attributable to the controlling interests $ 329,352 Capital expenditures $ 16,347 $ 12,841 $ 1,717 $ 30,905 Nine Months Ended September 30, 2018 Office Multifamily Corporate and Other (1) Consolidated Real estate rental revenue $ 135,258 $ 71,168 $ 13,564 $ 219,990 Real estate expenses 48,031 28,012 3,895 79,938 Net operating income $ 87,227 $ 43,156 $ 9,669 $ 140,052 Depreciation and amortization (83,134 ) General and administrative (16,737 ) Interest expense (38,155 ) Gain on sale of real estate 2,495 Real estate impairment (1,886 ) Loss on extinguishment of debt (1,178 ) Discontinued operations: Income from operations of properties sold or held for sale 18,485 Net income 19,942 Less: Net income attributable to noncontrolling interests in subsidiaries — Net income attributable to the controlling interests $ 19,942 Capital expenditures $ 17,926 $ 13,068 $ 3,069 $ 34,063 (1) Net operating income includes the retail properties not classified as discontinued operations: Takoma Park, Westminster, Concord Center, Chevy Chase Metro Plaza, 800 S. Washington Street, Randolph Shopping Center, Montrose Shopping Center and Spring Valley Village, and total assets and capital expenditures include all retail properties, including those classified as discontinued operations.

Shareholders' Equity (Tables)

Shareholders' Equity (Tables)	9 Months Ended
	Sep. 30, 2019
Equity [Abstract]
Schedule of Dividend Reinvestment Program Activity	Our issuances and net proceeds on the dividend reinvestment program were as follows (in thousands, except per share data): Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 Issuance of common shares 64 18 128 74 Weighted average price per share $ 27.67 $ 30.68 $ 26.97 $ 29.29 Net proceeds $ 1,757 $ 565 $ 3,430 $ 1,811

Nature of Business - Narrative

Nature of Business - Narrative (Details)	3 Months Ended	9 Months Ended
	Sep. 30, 2019USD ($)property	Sep. 30, 2019USD ($)propertysegment	Dec. 31, 2018USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of retail properties sold | property	8
Number of reportable segments | segment		2
Percentage of distribution of ordinary taxable income		90.00%
Number of retail properties sold that were identified for deferred exchange under Section 1031 | property	7
Number of multifamily properties acquired | property		8
Deferred tax liabilities | $	$ 600,000	$ 600,000	$ 600,000
Taxable Reit Subsidiary
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Deferred tax asset | $	1,400,000	1,400,000	1,400,000
Deferred tax asset, net of valuation allowance | $	$ 0	$ 0	$ 0

Summary of Significant Accoun_3

Summary of Significant Accounting Policies and Basis of Presentations - Pronouncements Adopted (Details) $ in Thousands	Jan. 01, 2019USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect adjustment upon adoption of new accounting standard	$ 906
ASU No. 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect adjustment upon adoption of new accounting standard	$ 900

Real Estate - Schedule of Acqui

Real Estate - Schedule of Acquisitions (Details) $ in Thousands	Jul. 23, 2019USD ($)unit	Jun. 27, 2019USD ($)unit	Apr. 30, 2019USD ($)unit	Sep. 30, 2019USD ($)unit
Real Estate [Line Items]
Contract Purchase Price				$ 530,920
Assembly Portfolio Virginia
Real Estate [Line Items]
Number of Units (unaudited) | unit			1,685
Contract Purchase Price			$ 379,100
Assembly Portfolio Maryland
Real Estate [Line Items]
Number of Units (unaudited) | unit		428
Contract Purchase Price		$ 82,070
Cascade at Landmark
Real Estate [Line Items]
Number of Units (unaudited) | unit	277
Contract Purchase Price	$ 69,750			$ 69,750
2019 Acquisitions
Real Estate [Line Items]
Number of Units (unaudited) | unit				2,390
Contract Purchase Price				$ 530,920

Real Estate - Schedule of Reven

Real Estate - Schedule of Revenue and Earnings for Acquired Properties (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Real Estate [Line Items]
Real estate rental revenue	$ 80,259	$ 71,001	$ 228,513	$ 219,990
Net loss	332,770	$ 5,893	329,352	$ 19,942
2019 Acquisitions
Real Estate [Line Items]
Real estate rental revenue	11,013		16,467
Net loss	$ (4,698)		$ (8,179)

Real Estate - Schedule of Cost

Real Estate - Schedule of Cost of Acquisition (Details) - USD ($) $ in Thousands	Jul. 23, 2019	Sep. 30, 2019
Real Estate [Line Items]
Contract purchase price		$ 530,920
Credit to buyer		(2,252)
Capitalized acquisition costs		2,860
Total cost		531,528
Assembly Portfolio
Real Estate [Line Items]
Contract purchase price		461,170
Credit to buyer		(2,252)
Capitalized acquisition costs		2,362
Total cost		461,280
Cascade at Landmark
Real Estate [Line Items]
Contract purchase price	$ 69,750	69,750
Credit to buyer		0
Capitalized acquisition costs		498
Total cost		$ 70,248

Real Estate - Schedule of Acq_2

Real Estate - Schedule of Acquisition Cost Allocation (Details) - 2019 Acquisitions $ in Thousands	9 Months Ended
	Sep. 30, 2019USD ($)
Real Estate [Line Items]
Total	$ 531,528
Absorption costs
Real Estate [Line Items]
Absorption costs	15,474
Land
Real Estate [Line Items]
Property, plant and equipment	92,391
Building
Real Estate [Line Items]
Property, plant and equipment	$ 423,663

Real Estate - Acquisitions and

Real Estate - Acquisitions and Development/Redevelopment Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Dec. 31, 2018	Sep. 30, 2019
Real Estate [Line Items]
Capitalized acquisition costs			$ 2,860
Total cost of acquisition			531,528
Real estate acquisitions, net			528,600
Credits received at settlement			2,900
Properties under development or held for future development	$ 110,572	$ 87,231	110,572
The Trove
Real Estate [Line Items]
Properties under development or held for future development	95,700		95,700
Assets placed into service	12,000
Riverside Developments
Real Estate [Line Items]
Properties under development or held for future development	24,200		24,200
Spring Valley Village Retail Center
Real Estate [Line Items]
Properties under development or held for future development	$ 6,500		$ 6,500
Assets placed into service		$ 4,200
Leasing Commissions/Absorption Costs
Real Estate [Line Items]
Weighted remaining average life (in months)			2 months

Real Estate - Properties Sold a

Real Estate - Properties Sold and Held for Sale (Details) $ in Thousands

Aug. 27, 2019USD ($)ft²

Aug. 21, 2019USD ($)ft²

Jul. 23, 2019USD ($)ft²property

Jun. 26, 2019USD ($)ft²

Jun. 28, 2018USD ($)ft²

Jan. 19, 2018USD ($)ft²

Sep. 30, 2019USD ($)ft²

Sep. 30, 2018USD ($)ft²

Sep. 30, 2019USD ($)ft²

Sep. 30, 2018USD ($)ft²

Apr. 22, 2019USD ($)

Mar. 31, 2019ft²

Mar. 31, 2018ft²

Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]

(Loss) gain on sale of real estate

$ 0

$ 0

$ (1,046)

$ 2,495

(Loss) gain on sale of real estate

$ 339,024

$ 0

$ 339,024

$ 0

Quantico Corporate Center | Office Building

Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]

Rentable Square Feet | ft²

272,000

Contract Sales Price

$ 33,000

(Loss) gain on sale of real estate

$ (1,000)

Shopping Center Portfolio

Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]

(Loss) gain on sale of real estate

$ 333,000

Frederick Crossing and Frederick County Square

Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]

(Loss) gain on sale of real estate

$ 9,500

Centre at Hagerstown

Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]

(Loss) gain on sale of real estate

$ (3,500)

2445 M Street | Office Building

Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]

Contract Sales Price

$ 101,600

(Loss) gain on sale of real estate

$ 2,500

2019 Properties Sold Group

Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]

Rentable Square Feet | ft²

1,922,000

1,922,000

Contract Sales Price

$ 599,250

$ 599,250

(Loss) gain on sale of real estate

$ 337,978

2019 Properties Sold Group | Disposal group, not discontinued operations | Quantico Corporate Center | Office Building

Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]

Rentable Square Feet | ft²

272,000

Contract Sales Price

$ 33,000

(Loss) gain on sale of real estate

$ (1,046)

2019 Properties Sold Group | Discontinued operations | Shopping Center Portfolio | Retail

Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]

Rentable Square Feet | ft²

800,000

Contract Sales Price

$ 485,250

(Loss) gain on sale of real estate

$ 333,023

Number of properties | property

5

2019 Properties Sold Group | Discontinued operations | Frederick Crossing and Frederick County Square | Retail

Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]

Rentable Square Feet | ft²

520,000

Contract Sales Price

$ 57,500

(Loss) gain on sale of real estate

$ 9,507

2019 Properties Sold Group | Discontinued operations | Centre at Hagerstown | Retail

Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]

Rentable Square Feet | ft²

330,000

Contract Sales Price

$ 23,500

(Loss) gain on sale of real estate

$ (3,506)

2018 Properties Sold Group

Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]

Rentable Square Feet | ft²

648,000

648,000

Contract Sales Price

$ 194,600

$ 194,600

(Loss) gain on sale of real estate

$ 2,495

2018 Properties Sold Group | 2445 M Street | Office Building

Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]

Rentable Square Feet | ft²

292,000

2018 Properties Sold Group | Disposal group, not discontinued operations | Braddock Metro Center | Office Building

Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]

Rentable Square Feet | ft²

356,000

Contract Sales Price

$ 93,000

(Loss) gain on sale of real estate

$ 0

2018 Properties Sold Group | Disposal group, not discontinued operations | 2445 M Street | Office Building

Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]

Rentable Square Feet | ft²

292,000

Contract Sales Price

$ 101,600

(Loss) gain on sale of real estate

$ 2,495

Real Estate - Properties Sold_2

Real Estate - Properties Sold and Held for Sale Narrative (Details) $ in Thousands	Aug. 27, 2019USD ($)	Aug. 21, 2019USD ($)	Jul. 23, 2019USD ($)	Jun. 26, 2019USD ($)	Jun. 28, 2018USD ($)	Jun. 30, 2019agreementbuyer	Sep. 30, 2019USD ($)	Mar. 31, 2019USD ($)ft²buildings	Sep. 30, 2018USD ($)	Mar. 31, 2018USD ($)	Sep. 30, 2019USD ($)	Sep. 30, 2018USD ($)	Dec. 31, 2017USD ($)	Apr. 22, 2019USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Real estate impairment							$ 0		$ 0		$ 8,374	$ 1,886
(Loss) gain on sale of real estate							0		0		(1,046)	2,495
(Loss) gain on sale of real estate							339,024		0		339,024	0
Loss on extinguishment of debt							$ 764		$ 0		$ 764	$ 0
2445 M Street | Office Building
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Initial contracted sales price										$ 100,000
Real estate impairment										$ 1,900			$ 24,100
Contract sales price					$ 101,600
(Loss) gain on sale of real estate					$ 2,500
Quantico Corporate Center | Office Building
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of buildings | buildings								2
Rentable square feet | ft²								272,000
Real estate impairment								$ 8,400
Contract sales price														$ 33,000
(Loss) gain on sale of real estate				$ (1,000)
Shopping Center Portfolio and Power Center Portfolio
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of purchase and sale agreements | agreement						2
Number of buyers | buyer						2
Shopping Center Portfolio
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
(Loss) gain on sale of real estate			$ 333,000
Frederick Crossing and Frederick County Square
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
(Loss) gain on sale of real estate		$ 9,500
Centre at Hagerstown
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
(Loss) gain on sale of real estate	$ (3,500)

Real Estate - Discontinued Oper

Real Estate - Discontinued Operations Results of Retail Portfolio (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Results of Discontinued Operations
Loss on extinguishment of debt	$ (764)	$ 0	$ (764)	$ 0
Gain on sale of real estate	339,024	0	339,024	0
Income from discontinued operations	$ 341,202	$ 6,440	$ 354,418	$ 18,485
Discontinued operations, basic (in dollars per share)	$ 4.24	$ 0.08	$ 4.41	$ 0.23
Discontinued operations, diluted (in dollars per share)	$ 4.24	$ 0.08	$ 4.41	$ 0.23
Retail Portfolio | Discontinued Operations
Results of Discontinued Operations
Real estate rental revenue	$ 4,126	$ 11,500	$ 28,200	$ 33,998
Real estate expenses	(1,095)	(2,582)	(6,803)	(8,036)
Depreciation and amortization	(59)	(2,321)	(4,926)	(6,985)
Interest expense	(30)	(157)	(313)	(492)
Loss on extinguishment of debt	(764)	0	(764)	0
Gain on sale of real estate	339,024	0	339,024	0
Income from discontinued operations	341,202	6,440	354,418	18,485
Capital expenditures	$ 0	$ 1,020	$ 809	$ 1,834

Real Estate - Discontinued Op_2

Real Estate - Discontinued Operations Assets and Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Assets - Discontinued Operations
Land	$ 611,797	$ 526,572
Income producing property	2,486,966	2,055,349
Net income producing property, at cost	3,098,763	2,581,921
Accumulated depreciation and amortization	(724,433)	(669,281)
Net income producing property	2,374,330	1,912,640
Rents and other receivables	69,414	63,962
Prepaid expenses and other assets	106,251	123,670
Liabilities - Discontinued Operations
Mortgage notes payable, net	47,319	48,277
Accounts payable and other liabilities	75,735	57,946
Advance rents	9,475	9,965
Tenant security deposits	10,849	9,501
Liabilities related to properties sold or held for sale	$ 0	15,518
Retail Portfolio | Discontinued Operations
Assets - Discontinued Operations
Land		88,087
Income producing property		216,577
Net income producing property, at cost		304,664
Accumulated depreciation and amortization		(101,254)
Net income producing property		203,410
Rents and other receivables		9,898
Prepaid expenses and other assets		8,653
Total assets		221,961
Liabilities - Discontinued Operations
Mortgage notes payable, net		11,515
Accounts payable and other liabilities		1,620
Advance rents		1,771
Tenant security deposits		612
Liabilities related to properties sold or held for sale		$ 15,518

Lease Accounting - Leasing as a

Lease Accounting - Leasing as a Lessor Narrative (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Jan. 01, 2019
Lessor, Lease, Description [Line Items]
Cumulative effect adjustment upon adoption of new accounting standard		$ 906
ASU No. 2016-02
Lessor, Lease, Description [Line Items]
Cumulative effect adjustment upon adoption of new accounting standard		$ 900
Multifamily Properties
Lessor, Lease, Description [Line Items]
Lessor operating lease terms (in years)	1 year
Commercial Office and Retail Properties
Lessor, Lease, Description [Line Items]
Lessor operating lease terms (in years)	7 years

Lease Accounting - Schedule of

Lease Accounting - Schedule of Future Minimum Rental Income (Details) $ in Thousands	Sep. 30, 2019USD ($)
Future Minimum Rental Income
2019	$ 38,665
2020	153,366
2021	136,394
2022	122,558
2023	105,126
Thereafter	396,401
Total	$ 952,510

Lease Accounting - Schedule o_2

Lease Accounting - Schedule of Future Minimum Rental Income at Prior Year End (Details) $ in Thousands	Dec. 31, 2018USD ($)
Future Minimum Rental Income - Prior Year End
2019	$ 154,260
2020	143,566
2021	125,008
2022	108,688
2023	89,969
Thereafter	253,749
Total	$ 875,240

Lease Accounting - Leasing as_2

Lease Accounting - Leasing as a Lessee Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Jan. 01, 2019	Dec. 31, 2018
Leases [Line Items]
Operating ground lease remaining lease term (in years)	52 years		52 years
Variable rental payments	$ 300	$ 300	$ 900	$ 800
Lease liability	$ 4,031		$ 4,031
Operating lease discount rate	5.90%		5.90%
Right-of-use asset and lease liability amortization	$ 100		$ 200
ASU No. 2016-02
Leases [Line Items]
Right-of-use asset					$ 4,200
Lease liability					4,200
Below-market ground lease
Leases [Line Items]
Accumulated amortization on below-market ground lease intangible asset prior to reclassification						$ 2,100
Below-market ground lease | Reclassification adjustment | ASU No. 2016-02
Leases [Line Items]
Below-market ground lease intangible asset reclassified					$ 10,000

Lease Accounting - Schedule o_3

Lease Accounting - Schedule of Obligations for Future Minimum Payments on Operating Ground Lease (Details) $ in Thousands	Sep. 30, 2019USD ($)
Obligations for Future Minimum Payments on Operating Ground Lease
2019	$ 65
2020	260
2021	260
2022	260
2023	260
2024	260
Thereafter	11,895
Total minimum payments due	13,260
Imputed interest	(9,229)
Lease liability	$ 4,031

Unsecured Line of Credit Paya_3

Unsecured Line of Credit Payable - Narrative (Details)	Sep. 30, 2019USD ($)	Mar. 31, 2018USD ($)extension_option	Sep. 30, 2019USD ($)	Mar. 29, 2018USD ($)	Sep. 15, 2015USD ($)
Line of Credit Facility [Line Items]
One-month LIBOR (percent)	2.02%		2.02%
Interest Rate Swap
Line of Credit Facility [Line Items]
Derivative notional amount	$ 400,000,000		$ 400,000,000
Credit Agreement 2018
Line of Credit Facility [Line Items]
Credit agreement, aggregate maximum borrowing capacity including accordion feature		$ 1,500,000,000
2015 Term Loan
Line of Credit Facility [Line Items]
Debt instrument, face amount					$ 150,000,000
2015 Term Loan | Interest Rate Swap
Line of Credit Facility [Line Items]
Derivative notional amount	150,000,000		150,000,000		$ 150,000,000
Derivative, fixed interest rate (percent)					2.72%
2018 Term Loan
Line of Credit Facility [Line Items]
Debt instrument, face amount				$ 250,000,000
2018 Term Loan | Interest Rate Swap
Line of Credit Facility [Line Items]
Derivative, fixed interest rate (percent)		2.87%		2.87%
2018 Term Loan A | Interest Rate Swap
Line of Credit Facility [Line Items]
Derivative notional amount	150,000,000	$ 150,000,000	150,000,000	$ 150,000,000
Derivative, fixed interest rate (percent)		2.31%		2.31%
2018 Term Loan B
Line of Credit Facility [Line Items]
Debt instrument, face amount				$ 100,000,000
2018 Term Loan B | Interest Rate Swap
Line of Credit Facility [Line Items]
Derivative notional amount	100,000,000	$ 100,000,000	$ 100,000,000	$ 100,000,000
Derivative, fixed interest rate (percent)		3.71%		3.71%
Term Loan | 2015 Term Loan
Line of Credit Facility [Line Items]
Debt instrument, face amount		$ 150,000,000
Term Loan | 2018 Term Loan
Line of Credit Facility [Line Items]
Debt instrument, face amount		250,000,000
Term Loan | 2018 Term Loan | LIBOR | Minimum
Line of Credit Facility [Line Items]
Basis spread on variable rate (percent)			0.85%
Term Loan | 2018 Term Loan | LIBOR | Maximum
Line of Credit Facility [Line Items]
Basis spread on variable rate (percent)			1.75%
Term Loan | 2018 Term Loan | Base Rate | Minimum
Line of Credit Facility [Line Items]
Basis spread on variable rate (percent)			0.00%
Term Loan | 2018 Term Loan | Base Rate | Maximum
Line of Credit Facility [Line Items]
Basis spread on variable rate (percent)			0.75%
Term Loan | 2018 Term Loan A
Line of Credit Facility [Line Items]
Debt instrument, face amount	150,000,000		$ 150,000,000
Term Loan | 2018 Term Loan B
Line of Credit Facility [Line Items]
Proceeds from issuance of long-term debt		100,000,000
Revolving Credit Facility
Line of Credit Facility [Line Items]
Revolving credit facility borrowing capacity	$ 700,000,000	$ 700,000,000	$ 700,000,000
Debt instrument, term (in years)		4 years
Debt instrument, maturity date		Mar. 29, 2022
Number of extensions allowed | extension_option		2
Term of allowable extensions (in months)		6 months
Commitment fee (percent)	0.20%
Revolving Credit Facility | Minimum
Line of Credit Facility [Line Items]
Commitment fee (percent)			0.10%
Revolving Credit Facility | Maximum
Line of Credit Facility [Line Items]
Commitment fee (percent)			0.30%
Revolving Credit Facility | LIBOR
Line of Credit Facility [Line Items]
Basis spread on variable rate (percent)	1.00%
Base rate component, spread on variable rate (percent)			1.00%
Revolving Credit Facility | LIBOR | Minimum
Line of Credit Facility [Line Items]
Basis spread on variable rate (percent)			0.775%
Revolving Credit Facility | LIBOR | Maximum
Line of Credit Facility [Line Items]
Basis spread on variable rate (percent)			1.55%
Revolving Credit Facility | Base Rate | Minimum
Line of Credit Facility [Line Items]
Basis spread on variable rate (percent)			0.00%
Revolving Credit Facility | Base Rate | Maximum
Line of Credit Facility [Line Items]
Basis spread on variable rate (percent)			0.55%
Revolving Credit Facility | Federal Funds Rate
Line of Credit Facility [Line Items]
Base rate component, spread on variable rate (percent)			0.50%

Unsecured Line of Credit Paya_4

Unsecured Line of Credit Payable - Schedule of Revolving Credit Facility Unused and Available Credit (Details) - USD ($)	Sep. 30, 2019	Dec. 31, 2018	Mar. 31, 2018
Line of Credit Facility [Line Items]
Borrowings outstanding	$ (211,000,000)	$ (188,000,000)
Revolving Credit Facility
Line of Credit Facility [Line Items]
Committed capacity	700,000,000		$ 700,000,000
Borrowings outstanding	(211,000,000)	$ (188,000,000)
Unused and available	$ 489,000,000

Unsecured Line of Credit Paya_5

Unsecured Line of Credit Payable - Schedule of Revolving Credit Facility Borrowings and Repayments (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Line of Credit [Roll Forward]
Balance, December 31, 2018	$ 188,000
Borrowings	23,000	$ 17,000
Balance, September 30, 2019	211,000
Revolving Credit Facility
Line of Credit [Roll Forward]
Balance, December 31, 2018	188,000
Borrowings	659,000
Repayments	(636,000)
Balance, September 30, 2019	$ 211,000

Notes Payable (Details)

Notes Payable (Details) - Term Loan - 2019 Term Loan - USD ($)	Apr. 30, 2019	Sep. 30, 2019	Sep. 30, 2019
Short-term Debt [Line Items]
Debt instrument, term (in years)	6 months
Debt instrument, face amount	$ 450,000,000
Debt instrument, maturity date	Oct. 30, 2019
Repayment of borrowings		$ 450,000,000
LIBOR
Short-term Debt [Line Items]
Base rate component, spread on variable rate (percent)			1.00%
Basis point component of interest rate at Company's election (percent)			1.00%
LIBOR | Minimum
Short-term Debt [Line Items]
Basis spread on variable rate (percent)			0.75%
LIBOR | Maximum
Short-term Debt [Line Items]
Basis spread on variable rate (percent)			1.65%
Base Rate | Minimum
Short-term Debt [Line Items]
Basis spread on variable rate (percent)			0.00%
Base Rate | Maximum
Short-term Debt [Line Items]
Basis spread on variable rate (percent)			0.65%
Federal Funds Rate
Short-term Debt [Line Items]
Base rate component, spread on variable rate (percent)			0.50%

Derivative Instruments - Narrat

Derivative Instruments - Narrative (Details)	9 Months Ended
	Sep. 30, 2019USD ($)	Mar. 31, 2018USD ($)	Mar. 29, 2018USD ($)arrangement	Jul. 22, 2016USD ($)arrangement	Sep. 15, 2015USD ($)arrangement
Interest Rate Swap
Derivative [Line Items]
Derivative notional amount	$ 400,000,000
Estimated amount to be reclassified within next twelve months as an increase to interest expense	300,000
Derivative assets	1,000,000
Derivative liabilities	4,700,000
2015 Term Loan
Derivative [Line Items]
Debt instrument, face amount					$ 150,000,000
2015 Term Loan | Interest Rate Swap
Derivative [Line Items]
Number of derivative instruments | arrangement					2
Derivative notional amount	150,000,000				$ 150,000,000
Derivative fixed interest rate (percent)					2.72%
2016 Term Loan
Derivative [Line Items]
Debt instrument, face amount				$ 150,000,000
2016 Term Loan | Interest Rate Swap
Derivative [Line Items]
Number of derivative instruments | arrangement				2
Derivative notional amount				$ 150,000,000
Derivative fixed interest rate (percent)				2.86%
2018 Term Loan
Derivative [Line Items]
Debt instrument, face amount			$ 250,000,000
2018 Term Loan | Interest Rate Swap
Derivative [Line Items]
Derivative fixed interest rate (percent)		2.87%	2.87%
2018 Term Loan A | Interest Rate Swap
Derivative [Line Items]
Derivative notional amount	150,000,000	$ 150,000,000	$ 150,000,000
Derivative fixed interest rate (percent)		2.31%	2.31%
2018 Term Loan B
Derivative [Line Items]
Debt instrument, face amount			$ 100,000,000
2018 Term Loan B | Interest Rate Swap
Derivative [Line Items]
Number of derivative instruments | arrangement			4
Derivative notional amount	$ 100,000,000	$ 100,000,000	$ 100,000,000
Derivative fixed interest rate (percent)		3.71%	3.71%

Derivative Instruments - Schedu

Derivative Instruments - Schedule of Fair Value of Interest Rate Swaps (Details) - Interest Rate Swap - USD ($)	Sep. 30, 2019	Dec. 31, 2018	Mar. 31, 2018	Mar. 29, 2018	Sep. 15, 2015
Derivatives, Fair Value [Line Items]
Aggregate Notional Amount	$ 400,000,000
Derivative Assets (Liabilities)	(3,659,000)	$ 9,839,000
2015 Term Loan
Derivatives, Fair Value [Line Items]
Aggregate Notional Amount	150,000,000				$ 150,000,000
2015 Term Loan | Accounts Payable and Other Liabilities
Derivatives, Fair Value [Line Items]
Derivative Assets (Liabilities)	(140,000)
2015 Term Loan | Prepaid Expenses and Other Assets
Derivatives, Fair Value [Line Items]
Derivative Assets (Liabilities)		2,720,000
2018 Term Loan A
Derivatives, Fair Value [Line Items]
Aggregate Notional Amount	150,000,000		$ 150,000,000	$ 150,000,000
2018 Term Loan A | Prepaid Expenses and Other Assets
Derivatives, Fair Value [Line Items]
Derivative Assets (Liabilities)	1,007,000	7,918,000
2018 Term Loan B
Derivatives, Fair Value [Line Items]
Aggregate Notional Amount	100,000,000		$ 100,000,000	$ 100,000,000
2018 Term Loan B | Accounts Payable and Other Liabilities
Derivatives, Fair Value [Line Items]
Derivative Assets (Liabilities)	$ (4,526,000)	$ (799,000)

Derivative Instruments - Sche_2

Derivative Instruments - Schedule of Net Gains and Losses on Derivatives (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized (loss) gain on interest rate swaps	$ (2,387)	$ 1,474	$ (13,498)	$ 7,762
Interest Rate Swap
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized (loss) gain on interest rate swaps	$ (2,387)	$ 1,474	$ (13,498)	$ 7,762

Fair Value Disclosures - Assets

Fair Value Disclosures - Assets and Liabilities Measured at Fair Value (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Interest Rate Swap
Assets:
Interest rate swaps	$ 1,000
Liabilities:
Interest rate swaps	(4,700)
Recurring | SERP
Assets:
SERP	1,636	$ 1,364
Recurring | Interest Rate Swap
Assets:
Interest rate swaps	1,007	10,638
Liabilities:
Interest rate swaps	(4,666)	(799)
Recurring | Level 1 | SERP
Assets:
SERP	0	0
Recurring | Level 1 | Interest Rate Swap
Assets:
Interest rate swaps	0	0
Liabilities:
Interest rate swaps	0	0
Recurring | Level 2 | SERP
Assets:
SERP	1,636	1,364
Recurring | Level 2 | Interest Rate Swap
Assets:
Interest rate swaps	1,007	10,638
Liabilities:
Interest rate swaps	(4,666)	(799)
Recurring | Level 3 | SERP
Assets:
SERP	0	0
Recurring | Level 3 | Interest Rate Swap
Assets:
Interest rate swaps	0	0
Liabilities:
Interest rate swaps	$ 0	$ 0

Fair Value Disclosures - Financ

Fair Value Disclosures - Financial Assets and Liabilities Not Measured at Fair Value (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Carrying Value
Carrying Value and Estimated Fair Values [Line Items]
Cash and cash equivalents	$ 12,931	$ 6,016
Restricted cash	1,578	1,624
Mortgage notes payable, net	47,319	48,277
Line of credit	211,000	188,000
Notes payable, net	996,455	995,397
Fair Value
Carrying Value and Estimated Fair Values [Line Items]
Cash and cash equivalents	12,931	6,016
Restricted cash	1,578	1,624
Mortgage notes payable, net	48,259	48,368
Line of credit	211,000	188,000
Notes payable, net	1,025,248	1,015,210
Olney Village Center | Carrying Value
Carrying Value and Estimated Fair Values [Line Items]
Mortgage notes payable, net	0	11,515
Olney Village Center | Fair Value
Carrying Value and Estimated Fair Values [Line Items]
Mortgage notes payable, net	$ 0	$ 12,030

Stock Based Compensation (Detai

Stock Based Compensation (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation expense	$ 1.7	$ 1.7	$ 6.3	$ 5.1
Washington Real Estate Investment Trust 2016 Omnibus Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate number of shares authorized for stock based awards (in shares)	2,400,000		2,400,000
Stock based plan, period in effect (in years)			10 years
Restricted Share Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of share awards vested			$ 1.7	$ 1.1
Total unvested restricted share awards (in shares)	428,840		428,840
Weighted average grant date fair value (in dollars per share)	$ 28.08		$ 28.08
Total compensation cost related to unvested restricted share awards	$ 7		$ 7
Total compensation cost related to unvested restricted share awards, expected period for recognition (in months)			24 months

Earnings per Common Share - Com

Earnings per Common Share - Computation of Basic and Diluted Earnings per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Numerator:
(Loss) income from continuing operations		$ (8,432)	$ (547)	$ (25,066)	$ 1,457
Allocation of losses (earnings) to unvested restricted share awards to continuing operations		47	(144)	118	(432)
Adjusted (loss) income from continuing operations attributable to the controlling interests		(8,385)	(691)	(24,948)	1,025
Income from discontinued operations		341,202	6,440	354,418	18,485
Allocation of earnings to unvested restricted share awards to discontinued operations		(1,841)	0	(1,870)	0
Adjusted income from discontinuing operations		339,361	6,440	352,548	18,485
Adjusted net income attributable to the controlling interests		$ 330,976	$ 5,749	$ 327,600	$ 19,510
Denominator:
Weighted average shares outstanding - basic (in shares)		79,981	79,076	79,933	78,695
Operating partnership units (in shares)		0	0	0	12
Employee restricted share awards (in shares)		0	0	0	95
Weighted average shares outstanding - diluted (in shares)		79,981	79,076	79,933	78,802
Earnings per common share, basic:
Continuing operations, basic (in dollars per share)		$ (0.10)	$ (0.01)	$ (0.31)	$ 0.01
Discontinued operations, basic (in dollars per share)		4.24	0.08	4.41	0.23
Basic net income attributable to the controlling interests per common share (in dollars per share)	[1]	4.14	0.07	4.10	0.25
Earnings per common share, diluted:
Continuing operations, diluted (in dollars per share)		(0.10)	(0.01)	(0.31)	0.01
Discontinued operations, diluted (in dollars per share)		4.24	0.08	4.41	0.23
Diluted net income attributable to the controlling interests per common share (in dollars per share)	[1]	4.14	0.07	4.10	0.25
Dividends declared per common share:
Dividends declared per common share (in dollars per share)		$ 0.30	$ 0.30	$ 0.90	$ 0.90
[1]	Earnings per share may not sum due to rounding

Segment Information - Narrative

Segment Information - Narrative (Details)	3 Months Ended	9 Months Ended
	Sep. 30, 2019property	Sep. 30, 2019segment
Segment Reporting [Abstract]
Number of reportable segments | segment		2
Number of retail properties sold | property	8

Segment Information - Segment S

Segment Information - Segment Schedules (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Segment Reporting Information [Line Items]
Real estate rental revenue	$ 80,259	$ 71,001	$ 228,513	$ 219,990
Real estate expenses	30,692	25,988	84,969	79,938
Net operating income	49,567	45,013	143,544	140,052
Depreciation and amortization	(37,340)	(27,951)	(97,441)	(83,134)
General and administrative expenses	(6,045)	(5,267)	(18,517)	(16,737)
Lease origination expenses	(416)	0	(1,286)	0
Interest expense	(14,198)	(12,342)	(41,946)	(38,155)
(Loss) gain on sale of real estate	0	0	(1,046)	2,495
Real estate impairment	0	0	(8,374)	(1,886)
Loss on extinguishment of debt	0	0	0	(1,178)
Income from operations of properties sold or held for sale	2,942	6,440	16,158	18,485
Gain on sale of real estate	339,024	0	339,024	0
Loss on extinguishment of debt, discontinued operations	(764)	0	(764)	0
Net income	332,770	5,893	329,352	19,942
Less: Net income attributable to noncontrolling interests in subsidiaries	0	0	0	0
Net income attributable to the controlling interests	332,770	5,893	329,352	19,942
Capital expenditures	12,150	15,504	30,905	34,063
Total assets	2,675,076	2,416,517	2,675,076	2,416,517	$ 2,417,104
Office | Reportable Segments
Segment Reporting Information [Line Items]
Real estate rental revenue	39,810	42,438	124,164	135,258
Real estate expenses	15,148	15,368	45,937	48,031
Net operating income	24,662	27,070	78,227	87,227
Capital expenditures	6,039	8,537	16,347	17,926
Total assets	1,191,838	1,246,026	1,191,838	1,246,026
Multifamily | Reportable Segments
Segment Reporting Information [Line Items]
Real estate rental revenue	35,790	23,953	90,012	71,168
Real estate expenses	14,232	9,297	34,928	28,012
Net operating income	21,558	14,656	55,084	43,156
Capital expenditures	5,742	5,708	12,841	13,068
Total assets	1,333,146	785,397	1,333,146	785,397
Corporate and Other
Segment Reporting Information [Line Items]
Real estate rental revenue	4,659	4,610	14,337	13,564
Real estate expenses	1,312	1,323	4,104	3,895
Net operating income	3,347	3,287	10,233	9,669
Capital expenditures	369	1,259	1,717	3,069
Total assets	$ 150,092	$ 385,094	$ 150,092	$ 385,094

Shareholders' Equity - Narrativ

Shareholders' Equity - Narrative (Details) $ / shares in Units, shares in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019USD ($)$ / sharesshares	Sep. 30, 2018USD ($)$ / sharesshares	Sep. 30, 2019USD ($)$ / sharesshares	Sep. 30, 2018USD ($)$ / sharesshares	May 04, 2018USD ($)agreement
Class of Stock [Line Items]
Number of separate equity distribution agreements | agreement					8
Net proceeds from equity issuances	$ 3,700,000	$ 35,500,000	$ 3,681,000	$ 35,472,000
Common Stock
Class of Stock [Line Items]
Shares reserved for future issuances					$ 250,000,000
Common shares issued (in shares) | shares	0.1	1.2	0.1	1.2
Shares issued, weighted average price per share (in dollars per share) | $ / shares	$ 27.52	$ 31.18	$ 27.52	$ 31.18

Shareholders' Equity - Dividend

Shareholders' Equity - Dividend Reinvestment Program Activity (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Equity [Abstract]
Issuance of common shares, dividend reinvestment program	64	18	128	74
Weighted average price per share, dividend reinvestment program (in dollars per share)	$ 27.67	$ 30.68	$ 26.97	$ 29.29
Proceeds from dividend reinvestment program	$ 1,757	$ 565	$ 3,430	$ 1,811

Uncategorized Items - wre-93020

Label	Element	Value
Parent [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	$ (906,000)
Accumulated Distributions in Excess of Net Income [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	$ (906,000)