Elme Communities (ELME) 10-Q 30 Jul 19 2019 Q2 Quarterly report Financial data

Cover Page

Cover Page - shares	6 Months Ended
	Jun. 30, 2019	Jul. 25, 2019
Cover page.
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 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	Q2
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		80,083,801

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Assets
Land	$ 597,258	$ 526,572
Income producing property	2,407,898	2,055,349
Net income producing property, at cost	3,005,156	2,581,921
Accumulated depreciation and amortization	(697,714)	(669,281)
Net income producing property	2,307,442	1,912,640
Properties under development or held for future development	107,969	87,231
Total real estate held for investment, net	2,415,411	1,999,871
Investment in real estate held for sale, net	199,865	203,410
Cash and cash equivalents	5,756	6,016
Restricted cash	1,650	1,624
Rents and other receivables	65,739	63,962
Prepaid expenses and other assets	113,434	123,670
Other assets related to properties held for sale	16,242	18,551
Total assets	2,818,097	2,417,104
Liabilities
Notes payable, net	1,445,444	995,397
Mortgage notes payable, net	47,563	48,277
Line of credit	218,000	188,000
Accounts payable and other liabilities	62,603	57,946
Dividend payable	0	24,022
Advance rents	8,801	9,965
Tenant security deposits	10,588	9,501
Other liabilities related to properties held for sale	14,390	15,518
Total liabilities	1,807,389	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; 80,082 and 79,910 shares issued and outstanding, as of June 30, 2019 and December 31, 2018, respectively	801	799
Additional paid in capital	1,532,497	1,526,574
Distributions in excess of net income	(521,661)	(469,085)
Accumulated other comprehensive (loss) income	(1,272)	9,839
Total shareholders’ equity	1,010,365	1,068,127
Noncontrolling interests in subsidiaries	343	351
Total equity	1,010,708	1,068,478
Total liabilities and equity	$ 2,818,097	$ 2,417,104

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - $ / shares	Jun. 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)	80,082,000	79,910,000
Shares of beneficial interest, shares outstanding (in shares)	80,082,000	79,910,000

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Revenue
Real estate rental revenue	$ 76,820	$ 75,344	$ 148,254	$ 148,989
Expenses
Real estate expenses	28,134	26,919	54,277	53,950
Depreciation and amortization	33,044	27,552	60,101	55,183
General and administrative expenses	5,043	5,649	12,472	11,470
Lease origination expenses	492	0	870	0
Real estate impairment	0	0	8,374	1,886
Operating expenses	66,713	60,120	136,094	122,489
(Loss) gain on sale of real estate	(1,046)	2,495	(1,046)	2,495
Real estate operating income	9,061	17,719	11,114	28,995
Other expense
Interest expense	(15,252)	(13,156)	(27,748)	(25,813)
Loss on extinguishment of debt	0	0	0	(1,178)
Total other income (expense)	(15,252)	(13,156)	(27,748)	(26,991)
(Loss) income from continuing operations	(6,191)	4,563	(16,634)	2,004
Discontinued operations:
Income from operations of properties sold or held for sale	7,178	6,187	13,216	12,045
Net income (loss)	987	10,750	(3,418)	14,049
Less: Net income attributable to noncontrolling interests in subsidiaries	0	0	0	0
Net (loss) income attributable to the controlling interests	$ 987	$ 10,750	$ (3,418)	$ 14,049
Basic net (loss) income attributable to the controlling interests per share:
Continuing operations, basic (in dollars per share)	$ (0.08)	$ 0.06	$ (0.21)	$ 0.02
Discontinued operations, basic (in dollars per share)	0.09	0.08	0.17	0.15
Basic net income (loss) attributable to the controlling interests per common share (in dollars per share)	0.01	0.14	(0.05)	0.18
Diluted net (loss) income attributable to the controlling interests per share:
Continuing operations, diluted (in dollars per share)	(0.08)	0.06	(0.21)	0.02
Discontinued operations, diluted (in dollars per share)	0.09	0.08	0.17	0.15
Diluted net income (loss) attributable to the controlling interests per common share (in dollars per share)	$ 0.01	$ 0.13	$ (0.05)	$ 0.18
Weighted average shares outstanding - basic (in shares)	79,934	78,520	79,908	78,501
Weighted average shares outstanding - diluted (in shares)	79,934	78,616	79,908	78,582

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Comprehensive (Loss) Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Statement of Comprehensive Income [Abstract]
Net (loss) income	$ 987	$ 10,750	$ (3,418)	$ 14,049
Unrealized (loss) gain on interest rate hedges	(6,942)	2,223	(11,111)	6,288
Comprehensive (loss) income	(5,955)	12,973	(14,529)	20,337
Less: Comprehensive income attributable to noncontrolling interests	0	0	0	0
Comprehensive (loss) income attributable to the controlling interests	$ (5,955)	$ 12,973	$ (14,529)	$ 20,337

Consolidated Statements of Equi

Consolidated Statements of Equity - USD ($) shares in Thousands, $ in Thousands	Total	Shares of Beneficial Interest at Par Value	Additional Paid in Capital	Distributions in Excess of Net Income	Accumulated Other Comprehensive (Loss) Income	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 (loss) attributable to the controlling interests	14,049			14,049		14,049
Unrealized gain (loss) on interest rate hedges	6,288				6,288	6,288
Distributions to noncontrolling interests	(7)						(7)
Dividends	$ (47,421)			(47,421)		(47,421)
Shares issued under dividend reinvestment program (in shares)	56	56
Shares issued under dividend reinvestment program	$ 1,246	$ 1	1,245			1,246
Share grants, net of forfeitures and tax withholdings (in shares)		95
Share grants, net of forfeitures and tax withholdings	3,142	$ 1	3,141			3,142
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
Balance (in shares) at Mar. 31, 2018		78,636
Balance at Mar. 31, 2018	1,080,764	$ 786	1,485,765	(419,633)	13,484	1,080,402	362
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss) attributable to the controlling interests	10,750			10,750		10,750
Unrealized gain (loss) on interest rate hedges	2,223				2,223	2,223
Distributions to noncontrolling interests	(4)						(4)
Dividends	$ (23,702)			(23,702)		(23,702)
Shares issued under dividend reinvestment program (in shares)	19	19
Shares issued under dividend reinvestment program	$ 529	$ 1	528			529
Share grants, net of forfeitures and tax withholdings (in shares)		6
Share grants, net of forfeitures and tax withholdings	2,073		2,073			2,073
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
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 (loss) attributable to the controlling interests	(3,418)			(3,418)		(3,418)
Unrealized gain (loss) on interest rate hedges	(11,111)				(11,111)	(11,111)
Distributions to noncontrolling interests	(8)						(8)
Dividends	$ (48,252)			(48,252)		(48,252)
Shares issued under dividend reinvestment program (in shares)	64	64
Shares issued under dividend reinvestment program	$ 1,673	$ 1	1,672			1,673
Share grants, net of forfeitures and tax withholdings (in shares)		108
Share grants, net of forfeitures and tax withholdings	4,252	$ 1	4,251			4,252
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
Balance (in shares) at Mar. 31, 2019		80,029
Balance at Mar. 31, 2019	1,038,196	$ 800	1,529,916	(498,537)	5,670	1,037,849	347
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss) attributable to the controlling interests	987			987		987
Unrealized gain (loss) on interest rate hedges	(6,942)				(6,942)	(6,942)
Distributions to noncontrolling interests	(4)						(4)
Dividends	$ (24,111)			(24,111)		(24,111)
Shares issued under dividend reinvestment program (in shares)	21	21
Shares issued under dividend reinvestment program	$ 576	$ 1	575			576
Share grants, net of forfeitures and tax withholdings (in shares)		32
Share grants, net of forfeitures and tax withholdings	2,006		2,006			2,006
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

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Cash flows from operating activities
Net (loss) income	$ (3,418)	$ 14,049
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Depreciation and amortization	64,968	59,847
Credit losses on lease related receivables	(133)	778
Real estate impairment	8,374	1,886
Gain on sale of real estate	1,046	(2,495)
Share-based compensation expense	4,527	3,370
Amortization of debt premiums, discounts and related financing costs	1,404	1,015
Loss on extinguishment of debt	0	1,178
Changes in operating other assets	(5,781)	(998)
Changes in operating other liabilities	(10,444)	(7,925)
Net cash provided by operating activities	60,543	70,705
Cash flows from investing activities
Real estate acquisitions, net	(458,604)	(106,400)
Net cash received for sale of real estate	31,334	175,024
Capital improvements to real estate	(18,634)	(18,094)
Development in progress	(19,445)	(15,428)
Real estate deposits, net	(1,744)	0
Non-real estate capital improvements	(121)	(465)
Net cash (used in) provided by investing activities	(467,214)	34,637
Cash flows from financing activities
Line of credit borrowings, net	30,000	3,000
Dividends paid	(72,274)	(71,002)
Principal payments – mortgage notes payable	(1,231)	(137,083)
Repayments of unsecured term loan debt	0	(150,000)
Proceeds from term loan	450,000	250,000
Payment of financing costs	(1,219)	(5,565)
Distributions to noncontrolling interests	(8)	(7)
Proceeds from dividend reinvestment program	1,673	1,245
Payment of tax withholdings for restricted share awards	(504)	(300)
Net cash provided by (used in) financing activities	406,437	(109,712)
Net decrease in cash, cash equivalents and restricted cash	(234)	(4,370)
Cash, cash equivalents and restricted cash at beginning of period	7,640	12,623
Cash, cash equivalents and restricted cash at end of period	7,406	8,253
Supplemental disclosure of cash flow information:
Cash paid for interest, net of amounts capitalized	26,418	25,196
Change in accrued capital improvements and development costs	(5,277)	885
Accrued selling costs related to sale of 2445 M Street	$ 0	$ 727

Consolidated Statements of Ca_2

Consolidated Statements of Cash Flows - Reconciliation of Cash, Cash Equivalents and Restricted Cash - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018	Dec. 31, 2017
Reconciliation of cash, cash equivalents and restricted cash:
Cash and cash equivalents	$ 5,756	$ 6,016	$ 5,952
Restricted cash	1,650	1,624	2,301
Cash, cash equivalents and restricted cash	$ 7,406	$ 7,640	$ 8,253	$ 12,623

Nature of Business

Nature of Business	6 Months Ended
	Jun. 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 office buildings, multifamily buildings and retail centers. During the 2019 Quarter, we executed two purchase and sale agreements for the sale of eight retail properties (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 (see note 11 ). The acquisitions of multifamily properties and planned 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. We have considered the provisions of the Tax Cuts and Jobs Act (the "TCJA"), which was signed into law on December 22, 2017 and which generally took effect for taxable years beginning on or after January 1, 2018, and the TCJA does not have a material impact on our ability to continue to qualify as a REIT. 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. 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 June 30, 2019 and December 31, 2018 , our TRSs had a deferred tax asset of $1.4 million that was fully reserved. As of both June 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	6 Months Ended
	Jun. 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 June 30, 2019 and June 30, 2018 as the “ 2019 Quarter” and the “ 2018 Quarter,” respectively, and the six months ended June 30, 2019 and June 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	6 Months Ended
	Jun. 30, 2019
Real Estate [Abstract]
Real Estate	REAL ESTATE Acquisitions We acquired the following properties (collectively, the “Assembly Portfolio”) 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 2,113 $ 461,170 (1) Consists of Assembly Alexandria, Assembly Manassas, Assembly Dulles, Assembly Leesburg, and Assembly Herndon. (2) Consists of Assembly Germantown and Assembly Watkins Mill. The purchase of the Assembly Portfolio (the “2019 acquisition”) was structured as a reverse exchange under Section 1031 of the Internal Revenue Code in a manner such that legal title will be held by a Qualified Intermediary until certain identified properties are sold and the reverse exchange transaction is completed. We retain all of the legal and economic benefits and obligations related to the Assembly Portfolio. As such, the Assembly Portfolio is considered to be a VIE until legal title is transferred to us upon completion of the 1031 exchange, which is expected during the third quarter of 2019. We have consolidated the assets and liabilities of the Assembly Portfolio because we have determined that WashREIT is the primary beneficiary of the Assembly Portfolio. The results of operations from the 2019 acquisition are included in the consolidated statements of operations as of their acquisition dates and are as follows: Three and Six Months Ended June 30, 2019 Real estate rental revenue $ 5,453 Net loss (3,481 ) We accounted for the 2019 acquisition as an asset acquisition. Accordingly, we capitalized $2.4 million of costs directly associated with the acquisition. 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 acquisition on a relative fair value basis. The total cost of the acquisition of the Assembly Portfolio was as follows (in thousands): Contract purchase price $ 461,170 Credit to seller (2,252 ) Capitalized acquisition costs 2,362 Total $ 461,280 We have recorded the total cost of the acquisition of the Assembly Portfolio as follows (in thousands): Land $ 80,102 Building 367,427 Absorption costs 13,751 Total $ 461,280 The weighted remaining average life for the leasing commissions/absorption costs is five months . The difference in the total cost of the acquisition of $461.3 million and the acquisition cost per the consolidated statements of cash flows of $458.6 million is primarily due to credits received at settlement totaling $2.4 million and additional acquisition-related costs not paid at closing of $0.3 million . Development/Redevelopment We have properties under development/redevelopment and held for current or future development as of June 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 June 30, 2019 , we had invested $81.7 million and $23.6 million , including the costs of acquiring the land, in The Trove and the development adjacent to Riverside Apartments, respectively. We also had a redevelopment project to add rentable space at Spring Valley Village, a retail center in Washington, DC. As of June 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 had eight properties classified as held for sale requiring discontinuation of depreciation during the 2019 Quarter. Operating revenues, other operating expenses and interest will continue to be recognized until the date of sale. We classified as held for sale or sold the following properties during 2019 and 2018: Disposition Date Property Name Property Type Rentable Square Feet Contract Sales Price (Loss) Gain on Sale July 23, 2019 Shopping Center Portfolio (1) Retail 800,000 $ 485,250 N/A N/A Power Center Portfolio (2) Retail 850,000 84,600 N/A June 26, 2019 Quantico Corporate Center Office 272,000 33,000 (1,046 ) Total 2019 1,922,000 $ 602,850 $ (1,046 ) 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 five retail properties: Gateway Overlook, Wheaton Park, Olney Village Center, Bradlee Shopping Center and Shoppes of Foxchase. (2) Consists of three retail properties: Centre at Hagerstown, Frederick Crossing and Frederick County Square. The contract sales price listed in this table reflects the purchase and sale agreement in place as of June 30, 2019. Subsequent to the end of the 2019 Quarter, the purchase and sale agreement to sell the Power Center Portfolio was amended to include only Frederick Crossing and Frederick County Square. 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 . We have fully transferred control of the assets associated with the sold properties: Quantico Corporate Center, 2445 M Street and Braddock Metro Center. 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 (collectively, the “Retail Portfolio”). 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 met the criteria for classification as held for sale. 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 closed on the Shopping Center Portfolio sale transaction on July 23, 2019. 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 will recognize in the third quarter of 2019. Subsequent to the end of the 2019 Quarter, the purchase and sale agreement to sell the Power Center Portfolio was amended to include only Frederick Crossing and Frederick County Square. We currently expect to close on this sale transaction during the third quarter of 2019. 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 potential buyer. We have executed a letter of intent for the sale of Centre at Hagerstown to a separate buyer. We have not yet entered into a purchase and sale agreement with the potential buyer, but assuming we are able to do so, we expect to close on the sale during the third quarter of 2019. No assurance can be given that any of these power center sales will be completed. As of June 30, 2019, we anticipate the disposition of certain properties prior to the end of their useful lives. We assessed these properties for impairment as of June 30, 2019 and did not recognize any impairment charges during the 2019 Quarter. We applied reasonable estimates and judgments in evaluating each of the properties as of June 30, 2019. Should external or internal circumstances change requiring the need to shorten holding periods or adjust future estimated cash flows from our properties, we could be required to record impairment charges in the future. 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 June 30, Six Months Ended June 30, 2019 2018 2019 2018 Real estate rental revenue $ 12,334 $ 11,262 $ 24,074 $ 22,498 Real estate expenses (2,641 ) (2,584 ) (5,708 ) (5,454 ) Depreciation and amortization (2,377 ) (2,326 ) (4,867 ) (4,664 ) Interest expense (138 ) (165 ) (283 ) (335 ) Income from operations of properties sold or held for sale $ 7,178 $ 6,187 $ 13,216 $ 12,045 Basic net income per share $ 0.09 $ 0.08 $ 0.17 $ 0.15 Diluted net income per share $ 0.09 $ 0.08 $ 0.17 $ 0.15 Capital expenditures $ 810 $ 617 $ 1,583 $ 905 As of June 30, 2019 and December 31, 2018 , assets related to the Retail Portfolio were as follows (in thousands): June 30, 2019 December 31, 2018 Land $ 88,087 $ 88,087 Income producing property 217,313 216,577 305,400 304,664 Accumulated depreciation and amortization (105,535 ) (101,254 ) Income producing property, net 199,865 203,410 Rents and other receivables 9,526 9,898 Prepaid expenses and other assets 6,716 8,653 Total assets $ 216,107 $ 221,961 As of June 30, 2019 and December 31, 2018 , liabilities related to the Retail Portfolio were as follows (in thousands): June 30, 2019 December 31, 2018 Mortgage notes payable, net $ 10,476 $ 11,515 Accounts payable and other liabilities 1,570 1,620 Advance rents 1,628 1,771 Tenant security deposits 716 612 Liabilities related to properties sold or held for sale $ 14,390 $ 15,518

Lease Accounting

Lease Accounting	6 Months Ended
	Jun. 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 when earned 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 June 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 $ 77,813 2020 147,274 2021 129,169 2022 113,740 2023 96,577 Thereafter 308,503 $ 873,076 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 $0.6 million during each of the 2019 and 2018 Periods. 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 of right-of-use and lease liability amortization during each of the 2019 Quarter and 2019 Period. 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 June 30, 2019 and a reconciliation of those cash flows to the operating lease liability as of June 30, 2019 (in thousands): 2019 $ 130 2020 260 2021 260 2022 260 2023 260 2024 260 Thereafter 11,895 13,325 Imputed interest (9,231 ) Lease liability $ 4,094

Unsecured Line of Credit Payabl

Unsecured Line of Credit Payable	6 Months Ended
	Jun. 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 June 30, 2019 , the interest rate on the Revolving Credit Facility is one month LIBOR plus 1.00% , the one month LIBOR is 2.40% 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 June 30, 2019 is as follows (in thousands): Committed capacity $ 700,000 Borrowings outstanding (218,000 ) Unused and available $ 482,000 We executed borrowings and repayments on the Revolving Credit Facility during the 2019 Period as follows (in thousands): Balance at December 31, 2018 $ 188,000 Borrowings 552,000 Repayments (522,000 ) Balance at June 30, 2019 $ 218,000

Notes Payable

Notes Payable	6 Months Ended
	Jun. 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 bears 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% . The 2019 Term Loan currently has an interest rate of one-week LIBOR plus 100 basis points, based on WashREIT’s current unsecured debt rating. As of June 30, 2019, $450.0 million of borrowings were outstanding and the all-in rate was 3.39% . The 2019 Term Loan was used to fund the acquisition of the Assembly Portfolio (see note 3 ) . Subsequent to end of 2019 Quarter, we repaid $350.0 million of the borrowings on the 2019 Term Loan with proceeds from the sale of the Shopping Center Portfolio (see note 3 ).

Derivative Instruments

Derivative Instruments	6 Months Ended
	Jun. 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 June 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 June 30, 2019 December 31, 2018 Interest rate swaps $ 150,000 October 15, 2015 March 15, 2021 $ 191 $ 2,720 Interest rate swaps 150,000 March 31, 2017 July 21, 2023 2,423 7,918 Interest rate swaps 100,000 June 29, 2018 July 21, 2023 (3,886 ) (799 ) $ 400,000 $ (1,272 ) $ 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 June 30, Six Months Ended June 30, 2019 2018 2019 2018 Unrealized (loss) gain on interest rate swaps $ (6,942 ) $ 2,223 $ (11,111 ) $ 6,288 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 $0.6 million will be reclassified as a decrease 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 June 30, 2019 , the fair value of derivative assets, including accrued interest, was $2.6 million , and the fair value of the derivative liabilities, including accrued interest, was $3.9 million . As of June 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	6 Months Ended
	Jun. 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 June 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 June 30, 2019 and December 31, 2018 were as follows (in thousands): June 30, 2019 December 31, 2018 Fair Value Level 1 Level 2 Level 3 Fair Value Level 1 Level 2 Level 3 Assets: SERP $ 1,585 $ — $ 1,585 $ — $ 1,364 $ — $ 1,364 $ — Interest rate swaps 2,614 — 2,614 — 10,638 — 10,638 — Liabilities: Interest rate swaps $ (3,886 ) $ — $ (3,886 ) $ — $ (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 June 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 June 30, 2019 and December 31, 2018 , the carrying values and estimated fair values of our financial instruments were as follows (in thousands): June 30, 2019 December 31, 2018 Carrying Value Fair Value Carrying Value Fair Value Cash and cash equivalents $ 5,756 $ 5,756 $ 6,016 $ 6,016 Restricted cash 1,650 1,650 1,624 1,624 Mortgage notes payable, net (1) 47,563 48,544 48,277 48,368 Line of credit 218,000 218,000 188,000 188,000 Notes payable, net 1,445,444 1,475,299 995,397 1,015,210 (1) Excludes mortgage note secured by Olney Village Center classified as Other liabilities related to properties held for sale. The mortgage note secured by Olney Village Center has been reclassified to Other liabilities related to properties held for sale (see note 3 ). As of June 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): June 30, 2019 December 31, 2018 Carrying Value Fair Value Carrying Value Fair Value Mortgage notes payable, net $ 10,476 $ 11,108 $ 11,515 $ 12,030

Stock Based Compensation

Stock Based Compensation	6 Months Ended
	Jun. 30, 2019
Share-based Compensation [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 and $1.8 million for the 2019 Quarter and 2018 Quarter, respectively, and $4.5 million and $3.4 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 June 30, 2019 was 441,867 shares, which had a weighted average grant date fair value of $28.02 per share. As of June 30, 2019 , the total compensation cost related to unvested restricted share awards was $8.8 million , which we expect to recognize over a weighted average period of 26

Earnings per Common Share

Earnings per Common Share	6 Months Ended
	Jun. 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 six months ended June 30, 2019 and 2018 were as follows (in thousands, except per share data): Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 Numerator: (Loss) income from continuing operations $ (6,191 ) $ 4,563 $ (16,634 ) $ 2,004 Net income attributable to noncontrolling interests in subsidiaries — — — — Allocation of earnings to unvested restricted share awards to continuing operations (133 ) (144 ) (267 ) (289 ) Adjusted (loss) income from continuing operations attributable to the controlling interests (6,324 ) 4,419 (16,901 ) 1,715 Income from discontinued operations 7,178 6,187 13,216 12,045 Adjusted net income (loss) attributable to the controlling interests $ 854 $ 10,606 $ (3,685 ) $ 13,760 Denominator: Weighted average shares outstanding – basic 79,934 78,520 79,908 78,501 Effect of dilutive securities: Operating partnership units — 12 — 12 Employee restricted share awards — 84 — 69 Weighted average shares outstanding – diluted 79,934 78,616 79,908 78,582 Earnings per common share, basic: Continuing operations $ (0.08 ) $ 0.06 $ (0.21 ) $ 0.02 Discontinued operations 0.09 0.08 0.17 0.15 Basic net income (loss) attributable to the controlling interests per common share (1) $ 0.01 $ 0.14 $ (0.05 ) $ 0.18 Earnings per common share, diluted: Continuing operations $ (0.08 ) $ 0.06 $ (0.21 ) $ 0.02 Discontinued operations 0.09 0.08 0.17 0.15 Diluted net income (loss) attributable to the controlling interests per common share (1) $ 0.01 $ 0.13 $ (0.05 ) $ 0.18 Dividends declared per common share $ 0.30 $ 0.30 $ 0.60 $ 0.60 (1) Earnings per share may not sum due to rounding.

Segment Information

Segment Information	6 Months Ended
	Jun. 30, 2019
Segment Reporting [Abstract]
Segment Information	SEGMENT INFORMATION We previously had three reportable segments: office, multifamily and retail. 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. Retail properties are typically grocery store-anchored neighborhood centers that include other small shop tenants or regional power centers with several junior box tenants. During the 2019 Quarter, we executed purchase and sale agreements for the sale of eight retail properties (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 have been classified within “Corporate and other” on our segment disclosure tables. The planned dispositions of the eight retail properties are part of a strategic shift away from the retail sector. This strategic shift simplifies our portfolio to two reportable segments (office and multifamily) and reduces 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 six months ended June 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 June 30, 2019 Office Multifamily Corporate and Other (1) Consolidated Real estate rental revenue $ 42,061 $ 29,887 $ 4,872 $ 76,820 Real estate expenses 15,565 11,226 1,343 28,134 Net operating income $ 26,496 $ 18,661 $ 3,529 $ 48,686 Depreciation and amortization (33,044 ) General and administrative expenses (5,043 ) Lease origination expenses (492 ) Interest expense (15,252 ) Loss on sale of real estate (1,046 ) Discontinued operations: Income from operations of properties sold or held for sale 7,178 Net income 987 Less: Net income attributable to noncontrolling interests in subsidiaries — Net income attributable to the controlling interests $ 987 Capital expenditures $ 5,385 $ 5,296 $ 726 $ 11,407 Total assets $ 1,196,703 $ 1,260,847 $ 360,547 $ 2,818,097 Three Months Ended June 30, 2018 Office Multifamily Corporate and Other (1) Consolidated Real estate rental revenue $ 47,273 $ 23,552 $ 4,519 $ 75,344 Real estate expenses 16,361 9,276 1,282 26,919 Net operating income $ 30,912 $ 14,276 $ 3,237 $ 48,425 Depreciation and amortization (27,552 ) General and administrative expenses (5,649 ) Interest expense (13,156 ) Gain on sale of real estate 2,495 Discontinued operations: Income from operations of properties sold or held for sale 6,187 Net income 10,750 Less: Net income attributable to noncontrolling interests in subsidiaries — Net income attributable to the controlling interests $ 10,750 Capital expenditures $ 4,444 $ 4,935 $ 1,163 $ 10,542 Total assets $ 1,253,594 $ 773,997 $ 381,537 $ 2,409,128 Six Months Ended June 30, 2019 Office Multifamily Corporate and Other (1) Consolidated Real estate rental revenue $ 84,354 $ 54,222 $ 9,678 $ 148,254 Real estate expenses 30,789 20,696 2,792 54,277 Net operating income $ 53,565 $ 33,526 $ 6,886 $ 93,977 Depreciation and amortization (60,101 ) General and administrative (12,472 ) Leasing origination expense (870 ) Interest expense (27,748 ) 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 13,216 Net loss (3,418 ) Less: Net income attributable to noncontrolling interests in subsidiaries — Net loss attributable to the controlling interests $ (3,418 ) Capital expenditures $ 10,308 $ 7,099 $ 1,348 $ 18,755 Six Months Ended June 30, 2018 Office Multifamily Corporate and Other (1) Consolidated Real estate rental revenue $ 92,820 $ 47,215 $ 8,954 $ 148,989 Real estate expenses 32,663 18,715 2,572 53,950 Net operating income $ 60,157 $ 28,500 $ 6,382 $ 95,039 Depreciation and amortization (55,183 ) General and administrative (11,470 ) Interest expense (25,813 ) 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 12,045 Net income 14,049 Less: Net income attributable to noncontrolling interests in subsidiaries — Net income attributable to the controlling interests $ 14,049 Capital expenditures $ 9,389 $ 7,360 $ 1,810 $ 18,559 (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	6 Months Ended
	Jun. 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 each of the 2019 and 2018 Quarters and Periods, we issued no common shares under the Equity Distribution Agreements. 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 June 30, Six Months Ended June 30, 2019 2018 2019 2018 Issuance of common shares 21 19 64 56 Weighted average price per share $ 26.97 $ 29.97 $ 26.23 $ 28.80 Net proceeds $ 576 $ 529 $ 1,673 $ 1,246

Subsequent Event

Subsequent Event	6 Months Ended
	Jun. 30, 2019
Subsequent Events [Abstract]
Subsequent Event	SUBSEQUENT EVENT During the 2019 Quarter, we executed a purchase and sale agreement for the acquisition of Cascade at Landmark, a 277 -unit multifamily property in Alexandria, Virginia, for a contract purchase price of $69.8 million . We closed on this acquisition on July 23, 2019.

Summary of Significant Accoun_2

Summary of Significant Accounting Policies and Basis of Presentations (Policies)	6 Months Ended
	Jun. 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 June 30, 2019 and June 30, 2018 as the “ 2019 Quarter” and the “ 2018 Quarter,” respectively, and the six months ended June 30, 2019 and June 30, 2018 as the “ 2019 Period” and the “ 2018 Period,” respectively.
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)	6 Months Ended
	Jun. 30, 2019
Real Estate [Abstract]
Schedule of Real Estate Property Acquired	We acquired the following properties (collectively, the “Assembly Portfolio”) 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 2,113 $ 461,170 (1) Consists of Assembly Alexandria, Assembly Manassas, Assembly Dulles, Assembly Leesburg, and Assembly Herndon. (2) Consists of Assembly Germantown and Assembly Watkins Mill.
Schedule of Revenue and Earnings of Acquired Properties	The results of operations from the 2019 acquisition are included in the consolidated statements of operations as of their acquisition dates and are as follows: Three and Six Months Ended June 30, 2019 Real estate rental revenue $ 5,453 Net loss (3,481 )
Schedule of Cost of Acquisition	The total cost of the acquisition of the Assembly Portfolio was as follows (in thousands): Contract purchase price $ 461,170 Credit to seller (2,252 ) Capitalized acquisition costs 2,362 Total $ 461,280
Schedule of Acquisition Asset Valuation	We have recorded the total cost of the acquisition of the Assembly Portfolio as follows (in thousands): Land $ 80,102 Building 367,427 Absorption costs 13,751 Total $ 461,280
Schedule of Properties Held-for-Sale or Sold and 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 June 30, Six Months Ended June 30, 2019 2018 2019 2018 Real estate rental revenue $ 12,334 $ 11,262 $ 24,074 $ 22,498 Real estate expenses (2,641 ) (2,584 ) (5,708 ) (5,454 ) Depreciation and amortization (2,377 ) (2,326 ) (4,867 ) (4,664 ) Interest expense (138 ) (165 ) (283 ) (335 ) Income from operations of properties sold or held for sale $ 7,178 $ 6,187 $ 13,216 $ 12,045 Basic net income per share $ 0.09 $ 0.08 $ 0.17 $ 0.15 Diluted net income per share $ 0.09 $ 0.08 $ 0.17 $ 0.15 Capital expenditures $ 810 $ 617 $ 1,583 $ 905 As of June 30, 2019 and December 31, 2018 , assets related to the Retail Portfolio were as follows (in thousands): June 30, 2019 December 31, 2018 Land $ 88,087 $ 88,087 Income producing property 217,313 216,577 305,400 304,664 Accumulated depreciation and amortization (105,535 ) (101,254 ) Income producing property, net 199,865 203,410 Rents and other receivables 9,526 9,898 Prepaid expenses and other assets 6,716 8,653 Total assets $ 216,107 $ 221,961 As of June 30, 2019 and December 31, 2018 , liabilities related to the Retail Portfolio were as follows (in thousands): June 30, 2019 December 31, 2018 Mortgage notes payable, net $ 10,476 $ 11,515 Accounts payable and other liabilities 1,570 1,620 Advance rents 1,628 1,771 Tenant security deposits 716 612 Liabilities related to properties sold or held for sale $ 14,390 $ 15,518 We classified as held for sale or sold the following properties during 2019 and 2018: Disposition Date Property Name Property Type Rentable Square Feet Contract Sales Price (Loss) Gain on Sale July 23, 2019 Shopping Center Portfolio (1) Retail 800,000 $ 485,250 N/A N/A Power Center Portfolio (2) Retail 850,000 84,600 N/A June 26, 2019 Quantico Corporate Center Office 272,000 33,000 (1,046 ) Total 2019 1,922,000 $ 602,850 $ (1,046 ) 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 five retail properties: Gateway Overlook, Wheaton Park, Olney Village Center, Bradlee Shopping Center and Shoppes of Foxchase. (2)

Lease Accounting (Tables)

Lease Accounting (Tables)	6 Months Ended
	Jun. 30, 2019
Leases [Abstract]
Schedule of Future Minimum Rental Income	As of June 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 $ 77,813 2020 147,274 2021 129,169 2022 113,740 2023 96,577 Thereafter 308,503 $ 873,076
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 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 June 30, 2019 and a reconciliation of those cash flows to the operating lease liability as of June 30, 2019 (in thousands): 2019 $ 130 2020 260 2021 260 2022 260 2023 260 2024 260 Thereafter 11,895 13,325 Imputed interest (9,231 ) Lease liability $ 4,094

Unsecured Line of Credit Paya_2

Unsecured Line of Credit Payable (Tables)	6 Months Ended
	Jun. 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 June 30, 2019 is as follows (in thousands): Committed capacity $ 700,000 Borrowings outstanding (218,000 ) Unused and available $ 482,000 We executed borrowings and repayments on the Revolving Credit Facility during the 2019 Period as follows (in thousands): Balance at December 31, 2018 $ 188,000 Borrowings 552,000 Repayments (522,000 ) Balance at June 30, 2019 $ 218,000

Derivative Instruments (Tables)

Derivative Instruments (Tables)	6 Months Ended
	Jun. 30, 2019
Derivative Instruments, Gain (Loss) [Line Items]
Schedule of Fair Value of Derivatives	The fair values of the interest rate swaps as of June 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 June 30, 2019 December 31, 2018 Interest rate swaps $ 150,000 October 15, 2015 March 15, 2021 $ 191 $ 2,720 Interest rate swaps 150,000 March 31, 2017 July 21, 2023 2,423 7,918 Interest rate swaps 100,000 June 29, 2018 July 21, 2023 (3,886 ) (799 ) $ 400,000 $ (1,272 ) $ 9,839
Schedule of Derivative Gains and Losses Recognized in Other Comprehensive Income	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 June 30, Six Months Ended June 30, 2019 2018 2019 2018 Unrealized (loss) gain on interest rate swaps $ (6,942 ) $ 2,223 $ (11,111 ) $ 6,288

Fair Value Disclosures (Tables)

Fair Value Disclosures (Tables)	6 Months Ended
	Jun. 30, 2019
Fair Value Disclosures [Abstract]
Financial Assets and Liabilities Measured at Fair Value	The fair values of these assets and liabilities at June 30, 2019 and December 31, 2018 were as follows (in thousands): June 30, 2019 December 31, 2018 Fair Value Level 1 Level 2 Level 3 Fair Value Level 1 Level 2 Level 3 Assets: SERP $ 1,585 $ — $ 1,585 $ — $ 1,364 $ — $ 1,364 $ — Interest rate swaps 2,614 — 2,614 — 10,638 — 10,638 — Liabilities: Interest rate swaps $ (3,886 ) $ — $ (3,886 ) $ — $ (799 ) $ — $ (799 ) $ —
Financial Assets and Liabilities Not Measured at Fair Value	As of June 30, 2019 and December 31, 2018 , the carrying values and estimated fair values of our financial instruments were as follows (in thousands): June 30, 2019 December 31, 2018 Carrying Value Fair Value Carrying Value Fair Value Cash and cash equivalents $ 5,756 $ 5,756 $ 6,016 $ 6,016 Restricted cash 1,650 1,650 1,624 1,624 Mortgage notes payable, net (1) 47,563 48,544 48,277 48,368 Line of credit 218,000 218,000 188,000 188,000 Notes payable, net 1,445,444 1,475,299 995,397 1,015,210

Earnings per Common Share (Tabl

Earnings per Common Share (Tables)	6 Months Ended
	Jun. 30, 2019
Earnings Per Share [Abstract]
Computation of Basic and Diluted Earnings per Share	The computations of basic and diluted earnings per share for the three and six months ended June 30, 2019 and 2018 were as follows (in thousands, except per share data): Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 Numerator: (Loss) income from continuing operations $ (6,191 ) $ 4,563 $ (16,634 ) $ 2,004 Net income attributable to noncontrolling interests in subsidiaries — — — — Allocation of earnings to unvested restricted share awards to continuing operations (133 ) (144 ) (267 ) (289 ) Adjusted (loss) income from continuing operations attributable to the controlling interests (6,324 ) 4,419 (16,901 ) 1,715 Income from discontinued operations 7,178 6,187 13,216 12,045 Adjusted net income (loss) attributable to the controlling interests $ 854 $ 10,606 $ (3,685 ) $ 13,760 Denominator: Weighted average shares outstanding – basic 79,934 78,520 79,908 78,501 Effect of dilutive securities: Operating partnership units — 12 — 12 Employee restricted share awards — 84 — 69 Weighted average shares outstanding – diluted 79,934 78,616 79,908 78,582 Earnings per common share, basic: Continuing operations $ (0.08 ) $ 0.06 $ (0.21 ) $ 0.02 Discontinued operations 0.09 0.08 0.17 0.15 Basic net income (loss) attributable to the controlling interests per common share (1) $ 0.01 $ 0.14 $ (0.05 ) $ 0.18 Earnings per common share, diluted: Continuing operations $ (0.08 ) $ 0.06 $ (0.21 ) $ 0.02 Discontinued operations 0.09 0.08 0.17 0.15 Diluted net income (loss) attributable to the controlling interests per common share (1) $ 0.01 $ 0.13 $ (0.05 ) $ 0.18 Dividends declared per common share $ 0.30 $ 0.30 $ 0.60 $ 0.60

Segment Information (Tables)

Segment Information (Tables)	6 Months Ended
	Jun. 30, 2019
Segment Reporting [Abstract]
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 six months ended June 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 June 30, 2019 Office Multifamily Corporate and Other (1) Consolidated Real estate rental revenue $ 42,061 $ 29,887 $ 4,872 $ 76,820 Real estate expenses 15,565 11,226 1,343 28,134 Net operating income $ 26,496 $ 18,661 $ 3,529 $ 48,686 Depreciation and amortization (33,044 ) General and administrative expenses (5,043 ) Lease origination expenses (492 ) Interest expense (15,252 ) Loss on sale of real estate (1,046 ) Discontinued operations: Income from operations of properties sold or held for sale 7,178 Net income 987 Less: Net income attributable to noncontrolling interests in subsidiaries — Net income attributable to the controlling interests $ 987 Capital expenditures $ 5,385 $ 5,296 $ 726 $ 11,407 Total assets $ 1,196,703 $ 1,260,847 $ 360,547 $ 2,818,097 Three Months Ended June 30, 2018 Office Multifamily Corporate and Other (1) Consolidated Real estate rental revenue $ 47,273 $ 23,552 $ 4,519 $ 75,344 Real estate expenses 16,361 9,276 1,282 26,919 Net operating income $ 30,912 $ 14,276 $ 3,237 $ 48,425 Depreciation and amortization (27,552 ) General and administrative expenses (5,649 ) Interest expense (13,156 ) Gain on sale of real estate 2,495 Discontinued operations: Income from operations of properties sold or held for sale 6,187 Net income 10,750 Less: Net income attributable to noncontrolling interests in subsidiaries — Net income attributable to the controlling interests $ 10,750 Capital expenditures $ 4,444 $ 4,935 $ 1,163 $ 10,542 Total assets $ 1,253,594 $ 773,997 $ 381,537 $ 2,409,128 Six Months Ended June 30, 2019 Office Multifamily Corporate and Other (1) Consolidated Real estate rental revenue $ 84,354 $ 54,222 $ 9,678 $ 148,254 Real estate expenses 30,789 20,696 2,792 54,277 Net operating income $ 53,565 $ 33,526 $ 6,886 $ 93,977 Depreciation and amortization (60,101 ) General and administrative (12,472 ) Leasing origination expense (870 ) Interest expense (27,748 ) 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 13,216 Net loss (3,418 ) Less: Net income attributable to noncontrolling interests in subsidiaries — Net loss attributable to the controlling interests $ (3,418 ) Capital expenditures $ 10,308 $ 7,099 $ 1,348 $ 18,755 Six Months Ended June 30, 2018 Office Multifamily Corporate and Other (1) Consolidated Real estate rental revenue $ 92,820 $ 47,215 $ 8,954 $ 148,989 Real estate expenses 32,663 18,715 2,572 53,950 Net operating income $ 60,157 $ 28,500 $ 6,382 $ 95,039 Depreciation and amortization (55,183 ) General and administrative (11,470 ) Interest expense (25,813 ) 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 12,045 Net income 14,049 Less: Net income attributable to noncontrolling interests in subsidiaries — Net income attributable to the controlling interests $ 14,049 Capital expenditures $ 9,389 $ 7,360 $ 1,810 $ 18,559 (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)	6 Months Ended
	Jun. 30, 2019
Equity [Abstract]
Schedule of Stock Issued, Dividend Reinvestment Plan	Our issuances and net proceeds on the dividend reinvestment program were as follows (in thousands, except per share data): Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 Issuance of common shares 21 19 64 56 Weighted average price per share $ 26.97 $ 29.97 $ 26.23 $ 28.80 Net proceeds $ 576 $ 529 $ 1,673 $ 1,246

Nature of Business - Narrative

Nature of Business - Narrative (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Percentage of distribution of ordinary taxable income	90.00%
Deferred tax liabilities, net	$ 0.6	$ 0.6
Taxable Reit Subsidiary [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Deferred tax asset	1.4	1.4
Deferred tax asset, net of valuation allowance	$ 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	Jun. 30, 2019USD ($)unit	Jun. 27, 2019USD ($)unit	Apr. 30, 2019USD ($)unit	Dec. 31, 2018USD ($)
Real Estate [Line Items]
Contract purchase price	$ 3,005,156			$ 2,581,921
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
Assembly Portfolio
Real Estate [Line Items]
Number of Units (unaudited) | unit	2,113
Contract purchase price	$ 461,170

Real Estate - Schedule of Reven

Real Estate - Schedule of Revenue and Earnings for Acquired Properties (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Real Estate [Line Items]
Real estate rental revenue	$ 76,820	$ 75,344	$ 148,254	$ 148,989
Net loss	$ 987	$ 10,750	(3,418)	$ 14,049
Assembly Portfolio
Real Estate [Line Items]
Real estate rental revenue			5,453
Net loss			$ (3,481)

Real Estate - Cost of Acquisiti

Real Estate - Cost of Acquisition (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Real Estate [Line Items]
Contract purchase price	$ 3,005,156	$ 2,581,921
Capitalized acquisition costs	2,400
Assembly Portfolio
Real Estate [Line Items]
Contract purchase price	461,170
Credit to seller	(2,252)
Capitalized acquisition costs	2,362
Total	$ 461,280

Real Estate - Schedule of Acq_2

Real Estate - Schedule of Acquisition, Asset Valuation (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Real Estate [Line Items]
Land	$ 597,258	$ 526,572
Assembly Portfolio
Real Estate [Line Items]
Land	80,102
Building	367,427
Absorption costs	13,751
Total cost of acquisition	$ 461,280

Real Estate - Narrative (Detail

Real Estate - Narrative (Details) $ in Thousands	Jul. 24, 2019USD ($)	Jun. 26, 2019USD ($)ft²	Jun. 28, 2018USD ($)ft²	Jun. 30, 2019USD ($)ft²	Mar. 31, 2019USD ($)ft²	Jun. 30, 2018USD ($)	Mar. 31, 2018USD ($)ft²	Jun. 30, 2019USD ($)ft²	Jun. 30, 2018USD ($)	Dec. 31, 2018USD ($)ft²	Dec. 31, 2017USD ($)	Apr. 22, 2019USD ($)
Real Estate [Line Items]
Capitalized acquisition costs								$ 2,400
Real estate acquisitions, net								458,604	$ 106,400
Properties under development or held for future development				$ 107,969				107,969		$ 87,231
Net income producing property, at cost				3,005,156				3,005,156		$ 2,581,921
Real estate impairment				0		$ 0		8,374	1,886
(Loss) gain on sale of real estate				(1,046)		2,495		(1,046)	2,495
Loss on extinguishment of debt				0		0		0	1,178
Assembly Portfolio
Real Estate [Line Items]
Capitalized acquisition costs								2,362
Total cost of acquisition								461,280
Credits received at settlement								2,400
Acquisition-related costs not paid at closing								300
Net income producing property, at cost				461,170				461,170
The Trove
Real Estate [Line Items]
Properties under development or held for future development				81,700				81,700
Riverside Developments
Real Estate [Line Items]
Properties under development or held for future development				23,600				23,600
Spring Vally Retail Center
Real Estate [Line Items]
Properties under development or held for future development				6,500				6,500
Net income producing property, at cost				$ 4,200				$ 4,200
Office Building | M Street 2445
Real Estate [Line Items]
Initial contracted sales price						$ 101,600	$ 100,000		$ 101,600
Real estate impairment							$ 1,900				$ 24,100
(Loss) gain on sale of real estate			$ 2,500
Office Building | Quantico Corporate Center
Real Estate [Line Items]
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)
2018 Properties Sold Group
Real Estate [Line Items]
Rentable square feet | ft²										648,000
Contract sales price										$ 194,600
(Loss) gain on sale of real estate										$ 2,495
2018 Properties Sold Group | Office Building | M Street 2445
Real Estate [Line Items]
Rentable square feet | ft²							292,000
2019 Properties Sold Group
Real Estate [Line Items]
Rentable square feet | ft²				1,922,000				1,922,000
Contract sales price				$ 602,850				$ 602,850
(Loss) gain on sale of real estate								$ (1,046)
Disposal Group, Disposed of by Sale | 2018 Properties Sold Group | Office Building | M Street 2445
Real Estate [Line Items]
Rentable square feet | ft²			292,000
Contract sales price			$ 101,600
(Loss) gain on sale of real estate			$ 2,495
Disposal Group, Disposed of by Sale | 2019 Properties Sold Group | Office Building | Quantico Corporate Center
Real Estate [Line Items]
Rentable square feet | ft²		272,000
Contract sales price		$ 33,000
(Loss) gain on sale of real estate		$ (1,046)
Subsequent Event | Olney Village Center
Real Estate [Line Items]
Loss on extinguishment of debt	$ 800
Leasing Commissions/Absorption Costs | Assembly Portfolio
Real Estate [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life								5 months

Real Estate - Properties Sold a

Real Estate - Properties Sold and Held for Sale (Details) $ in Thousands	Jun. 26, 2019USD ($)ft²	Jun. 28, 2018USD ($)ft²	Jan. 19, 2018USD ($)ft²	Jun. 30, 2019USD ($)ft²	Jun. 30, 2018USD ($)	Jun. 30, 2019USD ($)ft²	Jun. 30, 2018USD ($)	Dec. 31, 2018USD ($)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]
Gain on Sale				$ (1,046)	$ 2,495	$ (1,046)	$ 2,495
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
Gain on Sale	$ (1,000)
M Street 2445 | Office Building
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain on Sale		$ 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				$ 602,850		$ 602,850
Gain on Sale						$ (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		800,000
Contract Sales Price				$ 485,250		$ 485,250
2019 Properties Sold Group | Discontinued Operations | Power Center Portfolio | Retail
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Rentable Square Feet | ft²				850,000		850,000
Contract Sales Price				$ 84,600		$ 84,600
2019 Properties Sold Group | Disposal Group, Disposed of by Sale | 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
Gain on Sale	$ (1,046)
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
Contract Sales Price								$ 194,600
Gain on Sale								$ 2,495
2018 Properties Sold Group | M Street 2445 | 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, Disposed of by Sale | 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
Gain on Sale			$ 0
2018 Properties Sold Group | Disposal Group, Disposed of by Sale | M Street 2445 | 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
Gain on Sale		$ 2,495

Real Estate - Discontinued Oper

Real Estate - Discontinued Operations Results of Retail Portfolio (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Results of Discontinued Operations
Income from operations of properties sold or held for sale	$ 7,178	$ 6,187	$ 13,216	$ 12,045
Discontinued operations, basic (in dollars per share)	$ 0.09	$ 0.08	$ 0.17	$ 0.15
Discontinued operations, diluted (in dollars per share)	$ 0.09	$ 0.08	$ 0.17	$ 0.15
Retail Portfolio | Discontinued Operations
Results of Discontinued Operations
Real estate rental revenue	$ 12,334	$ 11,262	$ 24,074	$ 22,498
Real estate expenses	(2,641)	(2,584)	(5,708)	(5,454)
Depreciation and amortization	(2,377)	(2,326)	(4,867)	(4,664)
Interest expense	(138)	(165)	(283)	(335)
Income from operations of properties sold or held for sale	7,178	6,187	13,216	12,045
Capital expenditures	$ 810	$ 617	$ 1,583	$ 905

Real Estate - Discontinued Op_2

Real Estate - Discontinued Operations Assets and Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Assets - Discontinued Operations
Land	$ 597,258	$ 526,572
Income producing property	2,407,898	2,055,349
Net income producing property, at cost	3,005,156	2,581,921
Accumulated depreciation and amortization	(697,714)	(669,281)
Net income producing property	2,307,442	1,912,640
Rents and other receivables	65,739	63,962
Prepaid expenses and other assets	113,434	123,670
Liabilities - Discontinued Operations
Mortgage notes payable, net	47,563	48,277
Accounts payable and other liabilities	62,603	57,946
Advance rents	8,801	9,965
Tenant security deposits	10,588	9,501
Liabilities related to properties sold or held for sale	14,390	15,518
Retail Portfolio | Discontinued Operations
Assets - Discontinued Operations
Land	88,087	88,087
Income producing property	217,313	216,577
Net income producing property, at cost	305,400	304,664
Accumulated depreciation and amortization	(105,535)	(101,254)
Net income producing property	199,865	203,410
Rents and other receivables	9,526	9,898
Prepaid expenses and other assets	6,716	8,653
Total assets	216,107	221,961
Liabilities - Discontinued Operations
Mortgage notes payable, net	10,476	11,515
Accounts payable and other liabilities	1,570	1,620
Advance rents	1,628	1,771
Tenant security deposits	716	612
Liabilities related to properties sold or held for sale	$ 14,390	$ 15,518

Lease Accounting - Leasing as a

Lease Accounting - Leasing as a Lessor (Details) - USD ($) $ in Thousands	Jun. 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	Jun. 30, 2019USD ($)
Future Minimum Rental Income
2019	$ 77,813
2020	147,274
2021	129,169
2022	113,740
2023	96,577
Thereafter	308,503
Total	$ 873,076

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 (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2019	Jun. 30, 2018	Jan. 01, 2019	Dec. 31, 2018
Lease Description [Line Items]
Operating ground lease remaining lease term (in years)	52 years	52 years
Variable rental payments	$ 300	$ 600	$ 600
Lease liability	$ 4,094	$ 4,094
Operating lease discount rate	5.90%	5.90%
Right-of-use asset and lease liability amortization	$ 100	$ 100
ASU No. 2016-02
Lease Description [Line Items]
Right-of-use asset				$ 4,200
Lease liability				4,200
Below Market Ground Lease
Lease Description [Line Items]
Accumulated amortization on lease intangible asset prior to derecognition			$ 300		$ 2,100
Below Market Ground Lease | Reclassification Adjustment | ASU No. 2016-02
Lease Description [Line Items]
Below market ground lease reclassified				$ 10,000

Lease Accounting - Schedule o_3

Lease Accounting - Schedule of Future Minimum Payments on Operating Ground Lease (Details) $ in Thousands	Jun. 30, 2019USD ($)
Operating Lease Liabilities, Payments Due [Abstract]
2019	$ 130
2020	260
2021	260
2022	260
2023	260
2024	260
Thereafter	11,895
Total minimum payments due	13,325
Imputed interest	(9,231)
Lease liability	$ 4,094

Unsecured Line of Credit Paya_3

Unsecured Line of Credit Payable - Narrative (Details)	3 Months Ended	6 Months Ended
	Jun. 30, 2019USD ($)extension_option	Jun. 30, 2019USD ($)	Mar. 29, 2018USD ($)	Jul. 22, 2016USD ($)	Sep. 15, 2015USD ($)
Interest Rate Swap
Line of Credit Facility [Line Items]
Derivative, notional amount	$ 400,000,000	$ 400,000,000
2018 Term Loan
Line of Credit Facility [Line Items]
Debt instrument, fixed interest rate (percent)	2.87%	2.87%
LIBOR
Line of Credit Facility [Line Items]
Debt instrument variable rate (percent)	2.40%	2.40%
Line of Credit
Line of Credit Facility [Line Items]
Commitment fee (percent)		0.20%
Interest rate during period (percent)		1.00%
Line of Credit | Minimum
Line of Credit Facility [Line Items]
Commitment fee (percent)		0.10%
Line of Credit | Maximum
Line of Credit Facility [Line Items]
Commitment fee (percent)		0.30%
Line of Credit | LIBOR
Line of Credit Facility [Line Items]
Basis spread on variable rate (percent)		1.00%
Line of Credit | LIBOR | Minimum
Line of Credit Facility [Line Items]
Basis spread on variable rate (percent)		0.775%
Line of Credit | LIBOR | Maximum
Line of Credit Facility [Line Items]
Basis spread on variable rate (percent)		1.55%
Line of Credit | Base Rate | Minimum
Line of Credit Facility [Line Items]
Basis spread on variable rate (percent)		0.00%
Line of Credit | Base Rate | Maximum
Line of Credit Facility [Line Items]
Basis spread on variable rate (percent)		0.55%
Line of Credit | Federal Funds Rate
Line of Credit Facility [Line Items]
Basis spread on variable rate (percent)		0.50%
2015 Term Loan
Line of Credit Facility [Line Items]
Debt instrument, face amount	$ 150,000,000	$ 150,000,000
2015 Term Loan | Interest Rate Swap
Line of Credit Facility [Line Items]
Derivative, notional amount					$ 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%
2018 Term Loan A | Interest Rate Swap
Line of Credit Facility [Line Items]
Derivative, notional amount			$ 150,000,000	$ 150,000,000
Derivative, fixed interest rate (percent)			2.31%
2018 Term Loan A | LIBOR | Minimum
Line of Credit Facility [Line Items]
Basis spread on variable rate (percent)		0.85%
2018 Term Loan A | LIBOR | Maximum
Line of Credit Facility [Line Items]
Basis spread on variable rate (percent)		1.75%
2018 Term Loan A | Base Rate | Minimum
Line of Credit Facility [Line Items]
Basis spread on variable rate (percent)		0.00%
2018 Term Loan A | Base Rate | Maximum
Line of Credit Facility [Line Items]
Basis spread on variable rate (percent)		0.75%
2018 Term Loan B
Line of Credit Facility [Line Items]
Derivative, notional amount			$ 100,000,000
2018 Term Loan B | Interest Rate Swap
Line of Credit Facility [Line Items]
Derivative, notional amount			$ 100,000,000
Derivative, fixed interest rate (percent)			3.71%
Credit facility 2018
Line of Credit Facility [Line Items]
Line of credit, maximum borrowing capacity	1,500,000,000	$ 1,500,000,000
Credit facility 2018 | Line of Credit
Line of Credit Facility [Line Items]
Line of credit, maximum borrowing capacity	$ 700,000,000	$ 700,000,000
Debt instrument, term		4 years
Debt instrument, maturity date		Mar. 29, 2022
Number of extensions allowed | extension_option	2
Term of extension		6 months
Credit facility 2018 | 2015 Term Loan
Line of Credit Facility [Line Items]
Debt instrument, face amount	$ 150,000,000	$ 150,000,000
Credit facility 2018 | 2018 Term Loan
Line of Credit Facility [Line Items]
Debt instrument, face amount	$ 250,000,000	$ 250,000,000

Unsecured Line of Credit Paya_4

Unsecured Line of Credit Payable - Schedule of Credit Unused and Available (Details) - USD ($)	Jun. 30, 2019	Dec. 31, 2018
Line of Credit Facility [Line Items]
Borrowings outstanding	$ (218,000,000)	$ (188,000,000)
Credit facility 2018
Line of Credit Facility [Line Items]
Committed capacity	1,500,000,000
Line of Credit | Credit facility 2018
Line of Credit Facility [Line Items]
Committed capacity	700,000,000
Borrowings outstanding	(218,000,000)	$ (188,000,000)
Unused and available	$ 482,000,000

Unsecured Line of Credit Paya_5

Unsecured Line of Credit Payable - Borrowings and Repayments (Details)	6 Months Ended
	Jun. 30, 2019USD ($)
Line of Credit Facility, Increase (Decrease) During the Period [Roll Forward]
Balance at December 31, 2018	$ 188,000,000
Balance at June 30, 2019	218,000,000
Credit facility 2018
Line of Credit Facility [Line Items]
Line of credit, maximum borrowing capacity	1,500,000,000
Line of Credit | Credit facility 2018
Line of Credit Facility [Line Items]
Line of credit, maximum borrowing capacity	700,000,000
Line of Credit Facility, Increase (Decrease) During the Period [Roll Forward]
Balance at December 31, 2018	188,000,000
Borrowings	552,000,000
Repayments	(522,000,000)
Balance at June 30, 2019	$ 218,000,000

Notes Payable (Details)

Notes Payable (Details) - USD ($) $ in Thousands	Jul. 24, 2019	Apr. 30, 2019	Jun. 30, 2019	Dec. 31, 2018
Short-term Debt [Line Items]
Borrowings outstanding			$ 1,445,444	$ 995,397
Loan facility | 2019 Term Loan
Short-term Debt [Line Items]
Debt instrument, term		6 months
Debt instrument, face amount		$ 450,000
Debt instrument, maturity date		Oct. 30, 2019
Borrowings outstanding			$ 450,000
Basis point component of interest rate (percent)			1.00%
Debt instrument, all-in-rate (percent)			3.39%
Loan facility | 2019 Term Loan | Subsequent Event
Short-term Debt [Line Items]
Repayment of borrowings	$ 350,000
Loan facility | 2019 Term Loan | LIBOR
Short-term Debt [Line Items]
Base rate component, spread on variable rate (percent)			1.00%
Loan facility | 2019 Term Loan | LIBOR | Minimum
Short-term Debt [Line Items]
Basis spread on variable rate (percent)			0.75%
Loan facility | 2019 Term Loan | LIBOR | Maximum
Short-term Debt [Line Items]
Basis spread on variable rate (percent)			1.65%
Loan facility | 2019 Term Loan | Base Rate | Minimum
Short-term Debt [Line Items]
Basis spread on variable rate (percent)			0.00%
Loan facility | 2019 Term Loan | Base Rate | Maximum
Short-term Debt [Line Items]
Basis spread on variable rate (percent)			0.65%
Loan facility | 2019 Term Loan | 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) $ in Thousands	6 Months Ended
	Jun. 30, 2019USD ($)	Dec. 31, 2018USD ($)	Mar. 29, 2018USD ($)arrangement	Jul. 22, 2016USD ($)arrangement	Sep. 15, 2015USD ($)
Derivative Instruments, Gain (Loss) [Line Items]
Estimated derivative gain (loss) to be reclassified within twelve months	$ 600
Interest Rate Swap
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, notional amount	400,000
Derivative assets	2,614	$ 10,638
Derivative liabilities	3,886	$ 799
2015 Term Loan
Derivative Instruments, Gain (Loss) [Line Items]
Debt instrument, face amount	$ 150,000
2015 Term Loan | Interest Rate Swap
Derivative Instruments, Gain (Loss) [Line Items]
Number of derivative instruments held					2
Derivative, notional amount					$ 150,000
Derivative, fixed interest rate (percent)					2.72%
2016 Term Loan
Derivative Instruments, Gain (Loss) [Line Items]
Debt instrument, face amount				$ 150,000
2016 Term Loan | Interest Rate Swap
Derivative Instruments, Gain (Loss) [Line Items]
Number of derivative instruments held | arrangement				2
Derivative, fixed interest rate (percent)				2.86%
2018 Term Loan
Derivative Instruments, Gain (Loss) [Line Items]
Debt instrument, face amount			$ 250,000
2018 Term Loan | Interest Rate Swap
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, fixed interest rate (percent)			2.87%
2018 Term Loan A | Interest Rate Swap
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, notional amount			$ 150,000	$ 150,000
Derivative, fixed interest rate (percent)			2.31%
2018 Term Loan B
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, notional amount			$ 100,000
2018 Term Loan B | Interest Rate Swap
Derivative Instruments, Gain (Loss) [Line Items]
Number of derivative instruments held | arrangement			4
Derivative, notional amount			$ 100,000
Derivative, fixed interest rate (percent)			3.71%

Derivative Instruments - Schedu

Derivative Instruments - Schedule of Fair Value of Interest Rate Swaps (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018	Mar. 29, 2018	Jul. 22, 2016	Sep. 15, 2015
Interest Rate Swap
Derivatives, Fair Value [Line Items]
Aggregate Notional Amount	$ 400,000
Derivative assets	2,614	$ 10,638
Derivative Liabilities	3,886	799
Derivative Assets (Liabilities), at Fair Value, Net	(1,272)	9,839
2015 Term Loan | Interest Rate Swap
Derivatives, Fair Value [Line Items]
Aggregate Notional Amount					$ 150,000
2015 Term Loan | Interest Rate Swap | Prepaid Expenses and Other Assets
Derivatives, Fair Value [Line Items]
Derivative assets	191	2,720
2018 Term Loan A | Interest Rate Swap
Derivatives, Fair Value [Line Items]
Aggregate Notional Amount			$ 150,000	$ 150,000
2018 Term Loan A | Interest Rate Swap | Prepaid Expenses and Other Assets
Derivatives, Fair Value [Line Items]
Derivative assets	2,423	7,918
2018 Term Loan B
Derivatives, Fair Value [Line Items]
Aggregate Notional Amount			100,000
2018 Term Loan B | Interest Rate Swap
Derivatives, Fair Value [Line Items]
Aggregate Notional Amount			$ 100,000
2018 Term Loan B | Interest Rate Swap | Accounts Payable and Other Liabilities
Derivatives, Fair Value [Line Items]
Derivative Liabilities	$ (3,886)	$ (799)

Derivative Instruments - Sche_2

Derivative Instruments - Schedule of Gains and Losses on Derivatives (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Interest Rate Swap
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized (loss) gain on interest rate swaps	$ (6,942)	$ 2,223	$ (11,111)	$ 6,288

Fair Value Disclosures - Financ

Fair Value Disclosures - Financial Assets and Liabilities Measured at Fair Value (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Supplemental Employee Retirement Plan [Member]
Assets:
SERP	$ 1,585	$ 1,364
Supplemental Employee Retirement Plan [Member] | Level 1
Assets:
SERP	0	0
Supplemental Employee Retirement Plan [Member] | Level 2
Assets:
SERP	1,585	1,364
Supplemental Employee Retirement Plan [Member] | Level 3
Assets:
SERP	0	0
Interest Rate Swap
Assets:
Interest rate swaps	2,614	10,638
Liabilities:
Interest rate swaps	(3,886)	(799)
Interest Rate Swap | Level 1
Assets:
Interest rate swaps	0	0
Liabilities:
Interest rate swaps	0	0
Interest Rate Swap | Level 2
Assets:
Interest rate swaps	2,614	10,638
Liabilities:
Interest rate swaps	(3,886)	(799)
Interest Rate Swap | Level 3
Assets:
Interest rate swaps	0	0
Liabilities:
Interest rate swaps	$ 0	$ 0

Fair Value Disclosures - Fina_2

Fair Value Disclosures - Financial Assets and Liabilities Not Measured at Fair Value (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	$ 5,756	$ 6,016
Restricted cash	1,650	1,624
Mortgage notes payable, net	47,563	48,277
Line of credit	218,000	188,000
Notes payable, net	1,445,444	995,397
Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	5,756	6,016
Restricted cash	1,650	1,624
Mortgage notes payable, net	48,544	48,368
Line of credit	218,000	188,000
Notes payable, net	1,475,299	1,015,210
Olney Village Center | Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Mortgage notes payable, net	10,476	11,515
Olney Village Center | Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Mortgage notes payable, net	$ 11,108	$ 12,030

Stock Based Compensation (Detai

Stock Based Compensation (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation expense	$ 1.7	$ 1.8	$ 4.5	$ 3.4
Restricted Share Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of share grants vested			$ 1.7	$ 1.1
Total unvested restricted share awards (in shares)	441,867		441,867
Weighted average grant date fair value (in dollars per share)	$ 28.02		$ 28.02
Total compensation costs, non-vested restricted share awards	$ 8.8		$ 8.8
Total compensation cost not yet recognized, period for recognition (in months)			26 months
Washington Real Estate Investment Trust 2016 Omnibus Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based plan, aggregate number of shares authorized (in shares)	2,400,000		2,400,000
Stock based plan, period in effect (in years)			10 years

Earnings per Common Share - EPS

Earnings per Common Share - EPS Schedule (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Earnings Per Share [Abstract]
(Loss) income from continuing operations	$ (6,191)	$ 4,563	$ (16,634)	$ 2,004
Less: Net income attributable to noncontrolling interests in subsidiaries	0	0	0	0
Allocation of earnings to unvested restricted share awards to continuing operations	(133)	(144)	(267)	(289)
Adjusted (loss) income from continuing operations attributable to the controlling interests	(6,324)	4,419	(16,901)	1,715
Income from discontinued operations	7,178	6,187	13,216	12,045
Adjusted net income (loss) attributable to the controlling interests	$ 854	$ 10,606	$ (3,685)	$ 13,760
Weighted average shares outstanding - basic (in shares)	79,934	78,520	79,908	78,501
Operating partnership units (in shares)	0	12	0	12
Employee restricted share awards (in shares)	0	84	0	69
Weighted average shares outstanding - diluted (in shares)	79,934	78,616	79,908	78,582
Earnings per common share, basic:
Earnings per common share, basic, continuing operations (in dollars per share)	$ (0.08)	$ 0.06	$ (0.21)	$ 0.02
Earnings per common share, basic, discontinued operations (in dollars per share)	0.09	0.08	0.17	0.15
Basic net income (loss) attributable to the controlling interests per common share (in dollars per share)	0.01	0.14	(0.05)	0.18
Earnings per common share, diluted:
Earnings per common share, diluted, continuing operations (in dollars per share)	(0.08)	0.06	(0.21)	0.02
Earnings per common share, diluted, discontinued operations (in dollars per share)	0.09	0.08	0.17	0.15
Diluted net income (loss) attributable to the controlling interests per common share (in dollars per share)	0.01	0.13	(0.05)	0.18
Dividends declared per common share:
Dividends declared per common share (in dollars per share)	$ 0.30	$ 0.30	$ 0.60	$ 0.60

Segment Information - Segment S

Segment Information - Segment Schedules (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019USD ($)	Jun. 30, 2018USD ($)	Jun. 30, 2019USD ($)segment	Jun. 30, 2018USD ($)	Dec. 31, 2018USD ($)
Segment Reporting [Abstract]
Number of reportable segments | segment			3
Segment Reporting Information [Line Items]
Real estate rental revenue	$ 76,820	$ 75,344	$ 148,254	$ 148,989
Real estate expenses	28,134	26,919	54,277	53,950
Net operating income	48,686	48,425	93,977	95,039
Depreciation and amortization	(33,044)	(27,552)	(60,101)	(55,183)
General and administrative expenses	(5,043)	(5,649)	(12,472)	(11,470)
Lease origination expenses	(492)	0	(870)	0
Interest expense	(15,252)	(13,156)	(27,748)	(25,813)
(Loss) gain on sale of real estate	(1,046)	2,495	(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	7,178	6,187	13,216	12,045
Net (loss) income	987	10,750	(3,418)	14,049
Less: Net income attributable to noncontrolling interests in subsidiaries	0	0	0	0
Net income (loss) attributable to the controlling interests	987	10,750	(3,418)	14,049
Capital expenditures	11,407	10,542	18,755	18,559
Total assets	2,818,097	2,409,128	2,818,097	2,409,128	$ 2,417,104
Office
Segment Reporting Information [Line Items]
Real estate rental revenue	42,061	47,273	84,354	92,820
Real estate expenses	15,565	16,361	30,789	32,663
Net operating income	26,496	30,912	53,565	60,157
Capital expenditures	5,385	4,444	10,308	9,389
Total assets	1,196,703	1,253,594	1,196,703	1,253,594
Multifamily
Segment Reporting Information [Line Items]
Real estate rental revenue	29,887	23,552	54,222	47,215
Real estate expenses	11,226	9,276	20,696	18,715
Net operating income	18,661	14,276	33,526	28,500
Capital expenditures	5,296	4,935	7,099	7,360
Total assets	1,260,847	773,997	1,260,847	773,997
Corporate and Other
Segment Reporting Information [Line Items]
Real estate rental revenue	4,872	4,519	9,678	8,954
Real estate expenses	1,343	1,282	2,792	2,572
Net operating income	3,529	3,237	6,886	6,382
Capital expenditures	726	1,163	1,348	1,810
Total assets	$ 360,547	$ 381,537	$ 360,547	$ 381,537

Shareholders' Equity (Details)

Shareholders' Equity (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2019USD ($)$ / sharesshares	Jun. 30, 2018USD ($)$ / sharesshares	Jun. 30, 2019USD ($)$ / sharesshares	Jun. 30, 2018USD ($)$ / sharesshares	May 04, 2018USD ($)agreements
Class of Stock [Line Items]
Number of separate equity distribution agreements | agreements					8
Shares issued under dividend reinvestment program (in shares) | shares	21,000	19,000	64,000	56,000
Shares issued under dividend reinvestment program, weighted share price per share | $ / shares	$ 26.97	$ 29.97	$ 26.23	$ 28.80
Value of shares issued under dividend reinvestment program	$ 576,000	$ 529,000	$ 1,673,000	$ 1,246,000
Common Stock
Class of Stock [Line Items]
Capital shares reserved for future issuances					$ 250,000,000
Common shares issued | shares	0	0	0	0
Shares issued under dividend reinvestment program (in shares) | shares	21,000	19,000	64,000	56,000
Value of shares issued under dividend reinvestment program	$ 1,000	$ 1,000	$ 1,000	$ 1,000
Additional Paid in Capital
Class of Stock [Line Items]
Value of shares issued under dividend reinvestment program	$ 575,000	$ 528,000	$ 1,672,000	$ 1,245,000

Subsequent Event (Details)

Subsequent Event (Details) $ in Thousands	Jul. 23, 2019USD ($)unit	Jun. 30, 2019USD ($)	Dec. 31, 2018USD ($)
Subsequent Event [Line Items]
Contract purchase price		$ 3,005,156	$ 2,581,921
Subsequent Event | Cascade at Landmark
Subsequent Event [Line Items]
Contract purchase price	$ 69,800
Subsequent Event | Multifamily Properties | Cascade at Landmark
Subsequent Event [Line Items]
Number of units in portfolio to be acquired | unit	277

Uncategorized Items - wre-63020

Label	Element	Value
Parent [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	$ (906,000)
Retained Earnings [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	$ (906,000)
2018 Term Loan B [Member]
Derivative, Fixed Interest Rate	us-gaap_DerivativeFixedInterestRate	3.71%
Derivative, Notional Amount	invest_DerivativeNotionalAmount	$ 100,000,000
2018 Term Loan A [Member]
Derivative, Fixed Interest Rate	us-gaap_DerivativeFixedInterestRate	2.31%
Derivative, Notional Amount	invest_DerivativeNotionalAmount	$ 150,000,000
2018 Term Loan A [Member] | credit facility 2018 [Member]
Debt Instrument, Face Amount	us-gaap_DebtInstrumentFaceAmount	$ 150,000,000