Elme Communities (ELME) 10-Q 31 Jul 17 2017 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2017	Jul. 26, 2017
Document and Entity Information [Abstract]
Entity Registrant Name	WASHINGTON REAL ESTATE INVESTMENT TRUST
Entity Central Index Key	104,894
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Jun. 30, 2017
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	Q2
Amendment Flag	false
Entity Common Stock, Shares Outstanding		76,926,923

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Assets
Land	$ 616,444	$ 573,315
Income producing property	2,201,846	2,112,088
Real estate investment property, at cost	2,818,290	2,685,403
Accumulated depreciation and amortization	(691,515)	(657,425)
Net income producing property	2,126,775	2,027,978
Properties under development or held for future development	46,154	40,232
Total real estate held for investment, net	2,172,929	2,068,210
Investment in real estate sold or held for sale, net	6,983	0
Cash and cash equivalents	13,237	11,305
Restricted cash	1,506	6,317
Rents and other receivables, net of allowance for doubtful accounts of $2,274 and $2,377, respectively	72,149	64,319
Prepaid expenses and other assets	121,005	103,468
Other assets related to properties sold or held for sale	303	0
Total assets	2,388,112	2,253,619
Liabilities
Notes payable, net	893,763	843,084
Mortgage notes payable, net	96,934	148,540
Lines of credit	228,000	120,000
Accounts payable and other liabilities	60,165	46,967
Dividend payable	0	22,414
Advance rents	11,956	11,750
Tenant security deposits	9,263	8,802
Liabilities related to properties sold or held for sale	322	0
Total liabilities	1,300,403	1,201,557
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; 76,926 and 74,606 shares issued and outstanding, respectively	769	746
Additional paid in capital	1,435,994	1,368,636
Distributions in excess of net income	(357,308)	(326,047)
Accumulated other comprehensive income	6,857	7,611
Total shareholders’ equity	1,086,312	1,050,946
Noncontrolling interests in subsidiaries	1,397	1,116
Total equity	1,087,709	1,052,062
Total liabilities and equity	$ 2,388,112	$ 2,253,619

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Statement of Financial Position [Abstract]
Rents and other receivables, allowance for doubtful accounts	$ 2,274	$ 2,377
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)	76,926,000	74,606,000
Shares of beneficial interest, shares outstanding (in shares)	76,926,000	74,606,000

Condensed Consolidated Statemen

Condensed Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Revenue
Real estate rental revenue	$ 83,456	$ 79,405	$ 160,957	$ 156,542
Expenses
Real estate expenses	28,691	28,175	56,554	56,909
Depreciation and amortization	29,261	25,161	55,330	51,199
Acquisition costs	0	1,024	0	1,178
General and administrative	5,759	4,968	11,385	10,479
Casualty gain	0	(676)	0	(676)
Operating Expenses	63,711	58,652	123,269	119,089
Other operating income
Gain on sale of real estate	0	24,112	0	24,112
Real estate operating income	19,745	44,865	37,688	61,565
Other (expense) income
Interest expense	(12,053)	(13,820)	(23,458)	(28,180)
Other income	48	83	125	122
Income tax benefit	(107)	(693)	(107)	(693)
Total other income (expense)	(11,898)	(13,044)	(23,226)	(27,365)
Net income	7,847	31,821	14,462	34,200
Less: Net loss attributable to noncontrolling interests in subsidiaries	17	15	36	20
Net income attributable to the controlling interests	$ 7,864	$ 31,836	$ 14,498	$ 34,220
Basic net income per share:
Net income per share (in dollars per share)	$ 0.10	$ 0.44	$ 0.19	$ 0.49
Diluted net income per share:
Net income per share (in dollars per share)	$ 0.10	$ 0.44	$ 0.19	$ 0.49
Weighted average shares outstanding - basic (in shares)	76,705	71,719	75,785	70,010
Weighted average shares outstanding - diluted (in shares)	76,830	71,912	75,903	70,200
Dividends declared per share (in dollars per share)	$ 0.30	$ 0.30	$ 0.6	$ 0.60

Condensed Consolidated Stateme5

Condensed Consolidated Statements of Comprehensive Income Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Statement of Comprehensive Income [Abstract]
Net income	$ 7,847	$ 31,821	$ 14,462	$ 34,200
Unrealized loss on interest rate hedges	(1,489)	(1,384)	(754)	(5,059)
Comprehensive income	6,358	30,437	13,708	29,141
Less: Comprehensive loss attributable to noncontrolling interests	17	15	36	20
Comprehensive income attributable to the controlling interests	$ 6,375	$ 30,452	$ 13,744	$ 29,161

Consolidated Statement of Equit

Consolidated Statement of Equity - 6 months ended Jun. 30, 2017 - USD ($) shares in Thousands, $ in Thousands	Total	Shares of Beneficial Interest at Par Value [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Parent [Member]	Noncontrolling Interest [Member]
Balance (in shares) at Dec. 31, 2016		74,606
Balance at Dec. 31, 2016	$ 1,052,062	$ 746	$ 1,368,636	$ (326,047)	$ 7,611	$ 1,050,946	$ 1,116
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income attributable to the controlling interests	14,498			14,498		14,498
Net loss attributable to the noncontrolling interests	(36)						(36)
Unrealized loss on interest rate hedge	(754)				(754)	(754)
Distributions to noncontrolling interests	(59)						(59)
Contributions from noncontrolling interests	376						376
Dividends	(45,759)			(45,759)		(45,759)
Equity offerings, net of issuance costs (in shares)		2,070
Equity offerings, net of issuance costs	63,906	$ 21	63,885			63,906
Shares issued under dividend reinvestment program (in shares)		56
Shares issued under dividend reinvestment program	1,796		1,796			1,796
Share grants, net of forfeitures (in shares)		194
Share grants, net of share grant amortization, forfeitures and tax withholdings	1,679	$ 2	1,677			1,679
Balance (in shares) at Jun. 30, 2017		76,926
Balance at Jun. 30, 2017	$ 1,087,709	$ 769	$ 1,435,994	$ (357,308)	$ 6,857	$ 1,086,312	$ 1,397

Consolidated Statements of Cash

Consolidated Statements of Cash Flows $ in Thousands	6 Months Ended
	Jun. 30, 2017USD ($)	Jun. 30, 2016USD ($)
Net Cash Provided by (Used in) Operating Activities [Abstract]
Net income	$ 14,462	$ 34,200
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	55,330	51,199
Provision for losses on accounts receivable	470	708
Casualty gain	0	(676)
Gain on sale of real estate	0	24,112
Share-based compensation expense	2,351	2,421
Deferred tax benefit	(107)	(732)
Amortization of debt premiums, discounts and related financing costs	948	1,604
Changes in operating other assets	(10,950)	(983)
Changes in operating other liabilities	2,846	(2,366)
Net cash provided by operating activities	65,350	61,263
Cash flows from investing activities
Real estate acquisitions, net	(138,371)	(227,413)
Net cash received for sale of real estate	0	119,513
Capital improvements to real estate	(23,923)	(16,356)
Development in progress	(7,291)	(17,997)
Cash released from replacement reserve escrows, net	4,622	2,001
Insurance proceeds	0	883
Non-real estate capital improvements	(1,950)	(42)
Net cash used in investing activities	(166,913)	(139,411)
Cash flows from financing activities
Line of credit borrowings, net	108,000	164,000
Dividends paid	(68,173)	(63,284)
Principal payments – mortgage notes payable	(51,075)	(166,216)
Proceeds from term loan	50,000	0
Payment of financing costs	(234)	(236)
Distributions to noncontrolling interests	(59)	(110)
Proceeds from dividend reinvestment program	1,796	0
Net proceeds from equity issuances	63,906	143,357
Payment of tax withholdings for restricted share awards	(666)	(809)
Net cash provided by financing activities	103,495	76,702
Net increase (decrease) in cash and cash equivalents	1,932	(1,446)
Cash and cash equivalents at beginning of period	11,305	23,825
Cash and cash equivalents at end of period	13,237	22,379
Supplemental disclosure of cash flow information:
Cash paid for interest, net of amounts capitalized	22,670	27,154
Change in accrued capital improvements and development costs	1,090	$ 3,472
Business Acquisition, Equity Interest Issued or Issuable, Value Assigned	$ 376

Nature of Business

Nature of Business	6 Months Ended
	Jun. 30, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Nature of Business	NATURE OF BUSINESS Washington Real Estate Investment Trust (“Washington REIT”), 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 office buildings, multifamily buildings and retail centers. Federal Income Taxes We believe that we qualify as a Real Estate Investment Trust (“REIT”) under Sections 856-860 of the Internal Revenue Code and intend to continue to qualify as such. To maintain our status as a REIT, we are, among other things, required to distribute 90% of our REIT taxable income (which is, generally, our ordinary taxable income, with certain modifications), excluding any net capital gains and any deductions for dividends paid to our shareholders on an annual basis. When selling a property, we generally have the option of (a) reinvesting the sales proceeds of property sold, in a way that allows us to defer recognition of some or all taxable gain realized on the sale, (b) distributing gains to the shareholders with no tax to us or (c) treating net long-term capital gains as having been distributed to our shareholders, paying the tax on the gain deemed distributed and allocating the tax paid as a credit to our shareholders. 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 June 30, 2017 and December 31, 2016 , our TRSs had deferred tax assets of $0.6 million and $0.5 million , respectively, net of valuation allowances of $2.7 million and $2.9 million , respectively. During the 2017 Quarter, we recognized a deferred tax liability of $0.6 million in connection with the acquisition of Watergate 600 (see note 3). As of June 30, 2017 and December 31, 2016 , our TRSs had net deferred tax liabilities of $1.0 million and $0.4 million , respectively. The deferred tax liabilities are primarily related to temporary differences in the timing of the recognition of revenue, amortization and depreciation.

Summary of Significant Accounti

Summary of Significant Accounting Policies and Basis of Presentation	6 Months Ended
	Jun. 30, 2017
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, 2016 . Pronouncements Not Yet Adopted In May 2017, the Financial Accounting Standards Board (the “FASB”) issued ASU 2017-09, Compensation - Stock Compensation (Topic 718) - Scope of Modification Accounting, which provides guidance about which changes to the terms or conditions of a share-based payment award require an entity to apply modification accounting. The new standard is effective for all entities for fiscal years beginning after December 15, 2017 and for interim periods therein. Early adoption is permitted. We do not expect the new standard to have a material impact on our consolidated financial statements. In November 2016, the FASB issued Accounting Standards Update No. 2016-18, Statement of Cash Flows (Topic 230) - Restricted Cash , which requires that restricted cash and cash equivalents be included with cash and cash equivalents when reconciling beginning-of-period and end-of-period total amounts shown on the consolidated statements of cash flows. The new standard is effective for public entities for fiscal years beginning after December 15, 2017 and for interim periods therein, with early adoption permitted. We are currently evaluating the impact the new standard may have on Washington REIT’s consolidated financial statements. In August 2016, the FASB issued Accounting Standards Update No. 2016-15, Classification of Certain Cash Receipts and Cash Payments , which provides specific guidance on how cash receipts and payments should be presented and classified in the statement of cash flows for eight specific issues. The new standard is effective for public entities for fiscal years beginning after December 15, 2017 and for interim periods therein, with early adoption permitted. We are currently evaluating the impact the new standard may have on Washington REIT’s consolidated financial statements. In June 2016, the FASB issued Accounting Standards Update No. 2016-13, Measurement of Credit Losses on Financial Instruments , which 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 Washington REIT’s consolidated financial statements. In February 2016, the FASB issued Accounting Standards Update No. 2016-02, Leases (Topic 842) (“ASU 2016-02”) , which amends existing accounting standards for lease accounting, including by requiring lessees to recognize most leases on the balance sheet and making certain changes to lessor accounting. The new standard is effective for public entities for fiscal years beginning after December 15, 2018 and for interim periods therein with early adoption permitted. Upon adoption, for leases in which we are the lessor, the lease contract will be separated into lease and non-lease components in accordance with the provisions outlined within ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606) (“ASU 2014-09”). The lease component of the contract will be recognized on a straight-line basis in accordance with ASU 2016-02, while the non-lease component will be recognized under the provisions of ASU 2014-09. For lease contracts with a duration of more than one year in which we are the lessee, the present value of future lease payments will be recognized on our balance sheet as a right-of-use asset and a corresponding lease liability. Also, only direct leasing costs may be capitalized under the new standard, while current accounting standards allow for the capitalization of indirect leasing costs. We are currently evaluating the impact ASU 2016-02 may have on Washington REIT’s consolidated financial statements. In June 2014, the FASB issued ASU 2014-09, which creates a single source of revenue guidance. The new standard provides accounting guidance for all revenue arising from contracts with customers and affects all entities that enter into contracts to provide goods or services to their customers (unless the contracts are in the scope of other U.S. generally accepted accounting principles (“GAAP”) requirements, such as the leasing literature). The guidance also provides a model for the measurement and recognition of gains and losses on the sale of certain nonfinancial assets, such as property and equipment, including real estate. The new standard is effective for public entities for fiscal years beginning after December 15, 2017 and for interim periods therein. Early adoption is permitted for public entities beginning after December 15, 2016. We intend to adopt the new standard using the modified retrospective method. Upon adoption of ASU 2016-02, the majority of our revenue will be subject to the allocation provisions outlined within the revenue standard. We are currently evaluating the specific implementation requirements for allocating the consideration within our contracts in accordance with ASU 2014-09. We do not expect the new standard to have a material impact on the measurement and recognition of gains and losses on the sale of properties. Principles of Consolidation and Basis of Presentation The accompanying unaudited consolidated financial statements include the consolidated accounts of Washington REIT, our majority-owned subsidiaries and entities in which Washington REIT has a controlling interest, including where Washington REIT has been determined to be a primary beneficiary of a variable interest entity (“VIE”). See note 3 for additional information on the property for which there is a noncontrolling 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. 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, 2016 . Within these notes to the financial statements, we refer to the three months ended June 30, 2017 and June 30, 2016 as the “ 2017 Quarter” and the “ 2016 Quarter,” respectively and the six months ended June 30, 2017 and June 30, 2016 as the "2017 Period" and "2016 Period," respectively. 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, 2017
Real Estate [Abstract]
Real Estate	REAL ESTATE Acquisition Our current strategy is focused on properties inside the Washington metro region’s Beltway, near major transportation nodes and in areas with strong employment drivers and superior growth demographics. We seek to upgrade our portfolio with acquisitions as appropriate opportunities arise. We acquired the following property during the 2017 Quarter (the “2017 acquisition”): Acquisition Date Property Type Net Rentable Square Feet Contract Purchase Price (In thousands) April 4, 2017 Watergate 600 Office 289,000 $ 135,000 The results of operations from the 2017 acquisition are included in the consolidated statements of income from the acquisition date and are as follows (in thousands): Three and Six Months Ended June 30, 2017 Real estate rental revenue $ 4,902 Net income 964 We accounted for the acquisition of Watergate 600 as an asset acquisition. Accordingly, we capitalized $2.8 million of costs directly associated with the acquisition. We measured the value of the acquired physical assets (land and building), in-place leases (tenant origination costs, leasing commissions, absorption costs and lease intangible assets/liabilities), and any other liabilities by allocating the total cost of the acquisition on a relative fair value basis. We have recorded the total cost of the 2017 acquisition as follows (in thousands): Land $ 45,981 Building 66,241 Tenant origination costs 12,084 Leasing commissions/absorption costs 23,161 Lease intangible assets 498 Lease intangible liabilities (9,585 ) Deferred tax liability (560 ) Total $ 137,820 The weighted remaining average life for the 2017 acquisition components above, other than land, building and deferred tax liability, are 92 months for tenant origination costs, 84 months for leasing commissions/absorption costs, 19 months for net lease intangible assets and 97 months for net lease intangible liabilities. The difference in the total contract purchase price of $135.0 million for the 2017 acquisition and cash paid for the acquisition per the consolidated statements of cash flows of $138.4 million is primarily due to capitalized acquisition-related costs ( $2.8 million ) and a net credit to the buyer for certain expenditures ( $1.0 million ), partially offset by the issuance of 12,124 operating partnership units (“Operating Partnership Units”) as part of the consideration ( $0.4 million ). The Operating Partnership Units are units in WashREIT Watergate 600 OP LP, a consolidated subsidiary of Washington REIT. These Operating Partnership Units may be redeemed for either cash equal to the fair market value of a share of Washington REIT common stock at the time of redemption (based on a 20 -day average price) or, at the option of Washington REIT, one registered or unregistered share of Washington REIT common stock. In connection with the 2017 acquisition, we granted registration rights to the two contributors of the Watergate 600 property relating to the resale of any shares issued upon exchange of Operating Partnership Units pursuant to a shelf registration statement that we have an obligation to make available to the contributors approximately one year after the issuance of the Operating Partnership Units. Development/Redevelopment We have properties under development/redevelopment and held for current or future development as of June 30, 2017 . In the office segment, we have a redevelopment project at the Army Navy Building, an office property in Washington, DC, to upgrade its common areas and add significant amenities in order to make the property more competitive within its sub-market. As of June 30, 2017 , we had invested $4.1 million in the redevelopment and have placed $3.4 million of the project into service. We have substantially completed the additional amenities and expect to place the remainder of the project, consisting of upgrades to common areas, into service during the remainder of 2017. 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, 2017 , we had invested $23.8 million and $18.3 million , including the costs of acquired land, in the Trove and the development adjacent to Riverside Apartments, respectively. In the retail segment, we currently have a redevelopment project to add rentable space at Spring Valley Village. As of June 30, 2017 , we had invested $1.6 million in the redevelopment. Variable Interest Entity In June 2011, we executed a joint venture operating agreement with a real estate development company to develop The Maxwell, a mid-rise multifamily property at 650 North Glebe Road in Arlington, Virginia. Major construction activities at The Maxwell ended during December 2014, and the building became available for occupancy during the first quarter of 2015. Washington REIT is the 90% owner of the joint venture. The real estate development company owns 10% of the joint venture and was responsible for the development and construction of the property. We have determined that The Maxwell joint venture is a VIE primarily based on the fact that the equity investment at risk is not sufficient to permit the entity to finance its activities without additional financial support. We also determined that Washington REIT was the primary beneficiary of the VIE due to the fact that Washington REIT was determined to have a controlling financial interest in the entity. In January 2016, Washington REIT exercised its right to purchase at par The Maxwell’s construction loan from the original third-party lender. Upon the purchase, the construction loan became an intercompany loan payable from the consolidated VIE to Washington REIT that is eliminated in consolidation. As of June 30, 2017 and December 31, 2016 , The Maxwell’s assets were as follows (in thousands): June 30, 2017 December 31, 2016 Land $ 12,851 $ 12,851 Income producing property 37,955 37,949 Accumulated depreciation and amortization (5,689 ) (4,571 ) Other assets 536 456 $ 45,653 $ 46,685 As of June 30, 2017 and December 31, 2016 , The Maxwell’s liabilities were as follows (in thousands): June 30, 2017 December 31, 2016 Mortgage notes payable (1) $ 31,690 $ 31,869 Accounts payable and other liabilities 199 186 Tenant security deposits 89 99 $ 31,978 $ 32,154 (1) The mortgage notes payable balances as of June 30, 2017 and December 31, 2016 are eliminated in consolidation due to the purchase of the loan by Washington REIT in January 2016. 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. Depreciation on these properties is discontinued when classified as held for sale, but operating revenues, other operating expenses and interest continue to be recognized until the date of sale. During the 2017 Quarter, we executed a purchase and sale agreement for the sale of Walker House, a multifamily property in Gaithersburg, Maryland. We expect to close on this sale during 2017. We determined Walker House met the criteria for classification as held for sale as of June 30, 2017. There can be no assurances that this purchase and sale agreement will close on time or at all. We sold the following properties in 2016 : Disposition Date Property Name Segment Number of Units/ Rentable Square Feet Contract Gain on Sale May 26, 2016 Dulles Station II (1) Office N/A $ 12,100 $ 527 June 27, 2016 Maryland Office Portfolio Transaction I (2) Office 692,000 111,500 23,585 September 22, 2016 Maryland Office Portfolio Transaction II (3) Office 491,000 128,500 77,592 Total 2016 1,183,000 $ 252,100 $ 101,704 (1) Land held for future development and an interest in a parking garage. (2) Maryland Office Portfolio Transaction I consists of 6110 Executive Boulevard, 600 Jefferson Plaza, Wayne Plaza and West Gude Drive. (3) Maryland Office Portfolio Transaction II consists of 51 Monroe Street and One Central Plaza. While the sale of the Maryland Office Portfolio, in the aggregate, constituted an individually significant disposition, the Maryland Office Portfolio does not qualify for presentation and disclosure as a discontinued operation as it does not represent a strategic shift in our operations. Real estate rental revenue and net income for the Maryland Office Portfolio for the three and six months ended June 30, 2017 and 2016 are as follows: Three Months Ended June 30, Six Months Ended June 30, 2017 2016 2017 2016 Real estate rental revenue $ — $ 8,147 $ — $ 16,577 Net income — 4,176 — 6,902 We do not have significant continuing involvement in the operations of the disposed properties.

Mortgage Notes Payable

Mortgage Notes Payable	6 Months Ended
	Jun. 30, 2017
Debt Disclosure [Abstract]
Mortgage Notes Payable	MORTGAGE NOTES PAYABLE In February 2017, we prepaid without penalty the remaining $49.6 million of the mortgage note secured by the Army Navy Building.

Unsecured Lines of Credit Payab

Unsecured Lines of Credit Payable	6 Months Ended
	Jun. 30, 2017
Unsecured Debt [Abstract]
Unsecured Lines of Credit Payable	UNSECURED LINES OF CREDIT PAYABLE We have a $600.0 million unsecured revolving credit agreement (“Revolving Credit Facility”) that matures in June 2019 , unless extended pursuant to one or both of the two six months extension options. The Revolving Credit Facility has an accordion feature, which we utilized a portion of in September 2015, as described below, that allows us to increase the facility to $1.0 billion , subject to the extent the lenders agree to provide additional revolving loan commitments or term loans. In September 2015, we entered into a $150.0 million unsecured term loan (“2015 Term Loan”) by executing a portion of the accordion feature under the Revolving Credit Facility. The 2015 Term Loan has a 5.5 year term and currently has an interest rate of one month LIBOR plus 110 basis points, based on Washington REIT’s current unsecured debt ratings. We entered into two interest rate swaps to effectively fix the interest rate at 2.7% (see note 7 ). The Revolving Credit Facility bears interest at a rate of either one month LIBOR plus a margin ranging from 0.875% to 1.55% or the base rate plus a margin ranging from 0.0% to 0.55% (in each case depending upon Washington REIT’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 0.125% to 0.30% (depending on Washington REIT’s credit rating) on the $600.0 million committed capacity, without regard to usage. As of June 30, 2017 , the interest rate on the facility is one month LIBOR plus 1.00% and the facility fee is 0.20% . The amount of the Revolving Credit Facility’s unsecured line of credit unused and available at June 30, 2017 is as follows (in thousands): Committed capacity $ 600,000 Borrowings outstanding (228,000 ) Unused and available $ 372,000 We executed borrowings and repayments on the Revolving Credit Facility during the 2017 Period as follows (in thousands): Revolving Credit Facility Balance at December 31, 2016 $ 120,000 Borrowings 239,000 Repayments (131,000 ) Balance at June 30, 2017 $ 228,000

Note Payable (Notes)

Note Payable (Notes)	6 Months Ended
	Jun. 30, 2017
Debt Disclosure [Abstract]
Notes Payable	NOTES PAYABLE During 2016, we entered into a seven year, $150.0 million unsecured term loan (“2016 Term Loan”) maturing on July 21, 2023 with a deferred draw period of up to six months commencing on July 22, 2016. The 2016 Term Loan bears interest at a rate of either LIBOR plus a margin ranging from 1.50% to 2.45% or the base rate plus a margin ranging from 0.5% to 1.45% (in each case depending upon Washington REIT’s credit rating). The base rate is the highest of the administrative agent’s prime rate, the federal funds rate plus 0.50% and one-month LIBOR plus 1.0% . The 2016 Term Loan currently has an interest rate of one month LIBOR plus 165 basis points, based on Washington REIT’s current unsecured debt ratings. We borrowed $100.0 million on the term loan in the fourth quarter of 2016, and borrowed the remaining $50.0 million during the first quarter of 2017. We have also previously entered into forward interest rate swaps commencing on March 31, 2017 to effectively fix the interest rate on the 2016 Term Loan at 2.9% (see note 7 ).

Derivative Instruments

Derivative Instruments	6 Months Ended
	Jun. 30, 2017
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 2015 Term Loan (see note 5 ) to an all-in fixed interest rate of 2.7% 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 2016 Term Loan (see note 6 ) to an all-in fixed interest rate of 2.9% starting on March 31, 2017 and extending until the maturity of the 2016 Term Loan on July 21, 2023 . 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 effective portion of changes in fair value of the cash flow hedges in other comprehensive income (loss). The resulting unrealized gain (loss) on the effective portions of the cash flow hedges was the only activity in other comprehensive income (loss) 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 effective for the 2017 Quarter and 2017 Period and 2016 Quarter and 2016 Period, and therefore hedge ineffectiveness did not impact earnings during the 2017 Quarter and 2017 Period and 2016 Quarter and 2016 Period. The fair values of the interest rate swaps as of June 30, 2017 and December 31, 2016 , are as follows (in thousands): Fair Value Asset Derivatives Derivative Instrument Aggregate Notional Amount Effective Date Maturity Date June 30, 2017 December 31, 2016 Interest rate swaps $ 150,000 October 15, 2015 March 15, 2021 $ 578 $ 417 Interest rate swaps 150,000 March 31, 2017 July 21, 2023 6,279 7,194 $ 300,000 $ 6,857 $ 7,611 We record interest rate swaps on our consolidated balance sheets with prepaid expenses and other assets when in a net asset position and with 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 income (loss), as follows (in thousands): Three Months Ended June 30, Six Months Ended June 30, 2017 2016 2017 2016 Unrealized loss on interest rate hedges $ (1,489 ) $ (1,384 ) $ (754 ) $ (5,059 ) Amounts reported in accumulated other comprehensive loss 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 $0.2 million will be reclassified as an increase to interest expense. We have agreements with each of our derivative counterparties that contain a provision whereby we could be declared in default on our derivative obligations if repayment of the underlying indebtedness is accelerated by the lender due to our default on the indebtedness. As of June 30, 2017 , the fair value of derivatives is in a net asset position of $6.9 million , which includes accrued interest but excludes any adjustment for nonperformance risk. As of June 30, 2017 , 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 agreement. 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, 2017
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, 2017 and December 31, 2016 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, 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, 2017 and December 31, 2016 were as follows (in thousands): June 30, 2017 December 31, 2016 Fair Value Level 1 Level 2 Level 3 Fair Value Level 1 Level 2 Level 3 Assets: SERP $ 1,593 $ — $ 1,593 $ — $ 1,407 $ — $ 1,407 $ — Interest rate swaps $ 6,857 $ — $ 6,857 $ — $ 7,611 $ — $ 7,611 $ — 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. 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, 2017 may differ significantly from the amounts presented. Following is a summary of significant methodologies used in estimating fair values and a schedule of fair values at June 30, 2017 and December 31, 2016 . Cash and Cash Equivalents and Restricted Cash Cash and cash equivalents and restricted cash include cash and commercial paper with original maturities of less than 90 days, which are valued at the carrying value, which approximates fair value due to the short maturity of these instruments (Level 1 inputs). Notes Receivable We acquired a note receivable (“2445 M Street note”) in 2008 with the purchase of 2445 M Street. We estimate the fair value of the 2445 M Street note based on a discounted cash flow methodology using market discount rates (Level 3 inputs). Debt Mortgage notes payable consist of instruments in which certain of our real estate assets are used for collateral. We estimate the fair value of the mortgage notes payable by discounting the contractual cash flows at a rate equal to the relevant treasury rates (with respect to the timing of each cash flow) plus credit spreads estimated through independent comparisons to real estate assets or loans with similar characteristics. Lines of credit payable consist of our bank facility which we use for various purposes including working capital, acquisition funding and capital improvements. The lines of credit advances and term loans with floating interest rates are priced at a specified rate plus a spread. We estimate the market value based on a comparison of the spreads of the advances to market given the adjustable base rate. We estimate the fair value of the notes payable by discounting the contractual cash flows at a rate equal to the relevant treasury rates (with respect to the timing of each cash flow) plus credit spreads derived using the relevant securities’ market prices. We classify these fair value measurements as Level 3 as we use significant unobservable inputs and management judgment due to the absence of quoted market prices. As of June 30, 2017 and December 31, 2016 , the carrying values and estimated fair values of our financial instruments were as follows (in thousands): June 30, 2017 December 31, 2016 Carrying Value Fair Value Carrying Value Fair Value Cash and cash equivalents $ 13,237 $ 13,237 $ 11,305 $ 11,305 Restricted cash 1,506 1,506 6,317 6,317 2445 M Street note receivable 2,096 2,324 2,089 2,173 Mortgage notes payable, net 96,934 100,130 148,540 149,997 Lines of credit 228,000 228,000 120,000 120,000 Notes payable, net 893,763 925,915 843,084 873,516

Stock Based Compensation

Stock Based Compensation	6 Months Ended
	Jun. 30, 2017
Share-based Compensation [Abstract]
Stock Based Compensation	STOCK BASED COMPENSATION Washington REIT 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. Total Compensation Expense Total compensation expense recognized in the consolidated financial statements for all outstanding share based awards was $1.2 million and $0.9 million for the 2017 Quarter and 2016 Quarter, respectively, and $2.4 million and $2.4 million for the 2017 Period and 2016 Period, respectively. Restricted Share Awards The total fair values of restricted share awards vested was $2.0 million and $2.5 million for the 2017 Period and 2016 Period, respectively. The total unvested restricted share awards at June 30, 2017 was 356,093 shares, which had a weighted average grant date fair value of $30.85 per share. As of June 30, 2017 , the total compensation cost related to unvested restricted share awards was $8.3 million , which we expect to recognize over a weighted average period of 39 months.

Earnings per Common Share

Earnings per Common Share	6 Months Ended
	Jun. 30, 2017
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 diluted earnings per share calculation includes the dilutive impact of our share based awards with performance conditions prior to the grant date and awards with market conditions under the contingently issuable method. The dilutive earnings per share calculation also considers the Operating Partnership Units issued in connection with the 2017 acquisition, which were not dilutive for any of the periods presented. The computations of basic and diluted earnings per share for the three and six months ended June 30, 2017 and 2016 were as follows (in thousands, except per share data): Three Months Ended June 30, Six Months Ended June 30, 2017 2016 2017 2016 Numerator: Net income $ 7,847 $ 31,821 $ 14,462 $ 34,200 Net loss attributable to noncontrolling interests in subsidiaries 17 15 36 20 Allocation of earnings to unvested restricted share awards (107 ) (99 ) (184 ) (155 ) Adjusted net income attributable to the controlling interests $ 7,757 $ 31,737 $ 14,314 $ 34,065 Denominator: Weighted average shares outstanding – basic 76,705 71,719 75,785 70,010 Effect of dilutive securities: Operating partnership units 11 — 6 — Employee restricted share awards 114 193 112 190 Weighted average shares outstanding – diluted 76,830 71,912 75,903 70,200 Basic net income attributable to the controlling interests per common share $ 0.10 $ 0.44 $ 0.19 $ 0.49 Diluted net income attributable to the controlling interests per common share $ 0.10 $ 0.44 $ 0.19 $ 0.49

Segment Information

Segment Information	6 Months Ended
	Jun. 30, 2017
Segment Reporting [Abstract]
Segment Information	SEGMENT INFORMATION We have 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. 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 segments’ performance. Net operating income is a key measurement of our segment profit and loss. Net operating income is defined as segment real estate rental revenue less segment 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, 2017 and 2016 from these segments, and reconcile net operating income of reportable segments to net income attributable to the controlling interests as reported (in thousands): Three Months Ended June 30, 2017 Office Retail Multifamily Corporate and Other Consolidated Real estate rental revenue $ 44,109 $ 15,512 $ 23,835 $ — $ 83,456 Real estate expenses 15,853 3,597 9,241 — 28,691 Net operating income $ 28,256 $ 11,915 $ 14,594 $ — $ 54,765 Depreciation and amortization (29,261 ) General and administrative (5,759 ) Interest expense (12,053 ) Other income 48 Income tax benefit 107 Net income 7,847 Less: Net loss attributable to noncontrolling interests in subsidiaries 17 Net income attributable to the controlling interests $ 7,864 Capital expenditures $ 5,864 $ 62 $ 6,561 $ 1,375 $ 13,862 Total assets $ 1,241,618 $ 344,523 $ 766,972 $ 34,999 $ 2,388,112 Three Months Ended June 30, 2016 Office Retail Multifamily Corporate and Other Consolidated Real estate rental revenue $ 43,737 $ 15,080 $ 20,588 $ — $ 79,405 Real estate expenses 16,594 3,684 7,897 — 28,175 Net operating income $ 27,143 $ 11,396 $ 12,691 $ — $ 51,230 Depreciation and amortization (25,161 ) Acquisition costs (1,024 ) General and administrative (4,968 ) Interest expense (13,820 ) Other income 83 Gain on sale of real estate 24,112 Income tax benefit 693 Casualty gain 676 Net income 31,821 Less: Net loss attributable to noncontrolling interests in subsidiaries 15 Net income attributable to the controlling interests $ 31,836 Capital expenditures $ 5,854 $ 3,588 $ 2,198 $ 29 $ 11,669 Total assets $ 1,151,041 $ 352,094 $ 769,592 $ 33,724 $ 2,306,451 Six Months Ended June 30, 2017 Office Retail Multifamily Corporate Consolidated Real estate rental revenue $ 82,136 $ 31,217 $ 47,604 $ — $ 160,957 Real estate expenses 30,267 7,460 18,827 — 56,554 Net operating income $ 51,869 $ 23,757 $ 28,777 $ — $ 104,403 Depreciation and amortization (55,330 ) General and administrative (11,385 ) Interest expense (23,458 ) Other income 125 Income tax benefit 107 Net income 14,462 Less: Net loss attributable to noncontrolling interests in subsidiaries 36 Net income attributable to the controlling interests $ 14,498 Capital expenditures $ 10,819 $ 246 $ 12,858 $ 1,950 $ 25,873 Six Months Ended June 30, 2016 Office Retail Multifamily Corporate Consolidated Real estate rental revenue $ 87,555 30,460 $ 38,527 $ — $ 156,542 Real estate expenses 33,669 8,090 15,150 — 56,909 Net operating income 53,886 $ 22,370 $ 23,377 $ — $ 99,633 Depreciation and amortization (51,199 ) Acquisition costs (1,178 ) General and administrative (10,479 ) Interest expense (28,180 ) Other income 122 Gain on sale of real estate 24,112 Income tax benefit 693 Casualty gain 676 Net income 34,200 Less: Net loss attributable to noncontrolling interests in subsidiaries 20 Net income attributable to the controlling interests $ 34,220 Capital expenditures $ 8,025 $ 4,131 $ 4,200 $ 42 $ 16,398

Shareholders' Equity

Shareholders' Equity	6 Months Ended
	Jun. 30, 2017
Equity [Abstract]
Shareholders' Equity	SHAREHOLDERS' EQUITY On June 23, 2015, we entered into four separate equity distribution agreements (collectively, the “Equity Distribution Agreements”) with each of Wells Fargo Securities, LLC, BNY Mellon Capital Markets, LLC, Citigroup Global Markets Inc. and RBC Capital Markets, LLC relating to the issuance of up to $200.0 million of our common shares from time to time. Issuances of our common shares are made at market prices prevailing at the time of issuance. We may use net proceeds from the issuance of common shares under this program for general corporate purposes, including, without limitation, working capital, the acquisition, renovation, expansion, improvement, development or redevelopment of income producing properties or the repayment of debt. During the 2017 Quarter, we issued 1.1 million common shares under the Equity Distribution Agreements at an average price of $31.55 per share, raising $33.9 million in net proceeds. During the 2017 Period, we issued 2.1 million common shares under the Equity Distribution Agreements at an average price of $31.44 per share, raising $63.9 million in net proceeds. 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. During the 2017 Quarter, we issued 21,499 common shares under this program at a weighted average price of $31.95 per share, raising $0.7 million in net proceeds. During the 2017 Period, we issued 0.1 million common shares under the dividend reinvestment program at a weighted average price of $32.03 per share, raising $1.8 million in net proceeds.

Summary of Significant Accoun20

Summary of Significant Accounting Policies and Basis of Presentation (Policy)	6 Months Ended
	Jun. 30, 2017
Accounting Policies [Abstract]
Fiscal Period	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, 2016 .
New Accounting Pronouncements	Pronouncements Not Yet Adopted In May 2017, the Financial Accounting Standards Board (the “FASB”) issued ASU 2017-09, Compensation - Stock Compensation (Topic 718) - Scope of Modification Accounting, which provides guidance about which changes to the terms or conditions of a share-based payment award require an entity to apply modification accounting. The new standard is effective for all entities for fiscal years beginning after December 15, 2017 and for interim periods therein. Early adoption is permitted. We do not expect the new standard to have a material impact on our consolidated financial statements. In November 2016, the FASB issued Accounting Standards Update No. 2016-18, Statement of Cash Flows (Topic 230) - Restricted Cash , which requires that restricted cash and cash equivalents be included with cash and cash equivalents when reconciling beginning-of-period and end-of-period total amounts shown on the consolidated statements of cash flows. The new standard is effective for public entities for fiscal years beginning after December 15, 2017 and for interim periods therein, with early adoption permitted. We are currently evaluating the impact the new standard may have on Washington REIT’s consolidated financial statements. In August 2016, the FASB issued Accounting Standards Update No. 2016-15, Classification of Certain Cash Receipts and Cash Payments , which provides specific guidance on how cash receipts and payments should be presented and classified in the statement of cash flows for eight specific issues. The new standard is effective for public entities for fiscal years beginning after December 15, 2017 and for interim periods therein, with early adoption permitted. We are currently evaluating the impact the new standard may have on Washington REIT’s consolidated financial statements. In June 2016, the FASB issued Accounting Standards Update No. 2016-13, Measurement of Credit Losses on Financial Instruments , which 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 Washington REIT’s consolidated financial statements. In February 2016, the FASB issued Accounting Standards Update No. 2016-02, Leases (Topic 842) (“ASU 2016-02”) , which amends existing accounting standards for lease accounting, including by requiring lessees to recognize most leases on the balance sheet and making certain changes to lessor accounting. The new standard is effective for public entities for fiscal years beginning after December 15, 2018 and for interim periods therein with early adoption permitted. Upon adoption, for leases in which we are the lessor, the lease contract will be separated into lease and non-lease components in accordance with the provisions outlined within ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606) (“ASU 2014-09”). The lease component of the contract will be recognized on a straight-line basis in accordance with ASU 2016-02, while the non-lease component will be recognized under the provisions of ASU 2014-09. For lease contracts with a duration of more than one year in which we are the lessee, the present value of future lease payments will be recognized on our balance sheet as a right-of-use asset and a corresponding lease liability. Also, only direct leasing costs may be capitalized under the new standard, while current accounting standards allow for the capitalization of indirect leasing costs. We are currently evaluating the impact ASU 2016-02 may have on Washington REIT’s consolidated financial statements. In June 2014, the FASB issued ASU 2014-09, which creates a single source of revenue guidance. The new standard provides accounting guidance for all revenue arising from contracts with customers and affects all entities that enter into contracts to provide goods or services to their customers (unless the contracts are in the scope of other U.S. generally accepted accounting principles (“GAAP”) requirements, such as the leasing literature). The guidance also provides a model for the measurement and recognition of gains and losses on the sale of certain nonfinancial assets, such as property and equipment, including real estate. The new standard is effective for public entities for fiscal years beginning after December 15, 2017 and for interim periods therein. Early adoption is permitted for public entities beginning after December 15, 2016. We intend to adopt the new standard using the modified retrospective method. Upon adoption of ASU 2016-02, the majority of our revenue will be subject to the allocation provisions outlined within the revenue standard. We are currently evaluating the specific implementation requirements for allocating the consideration within our contracts in accordance with ASU 2014-09. We do not expect the new standard to have a material impact on the measurement and recognition of gains and losses on the sale of properties.
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 Washington REIT, our majority-owned subsidiaries and entities in which Washington REIT has a controlling interest, including where Washington REIT has been determined to be a primary beneficiary of a variable interest entity (“VIE”). See note 3 for additional information on the property for which there is a noncontrolling 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. 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, 2016 . Within these notes to the financial statements, we refer to the three months ended June 30, 2017 and June 30, 2016 as the “ 2017 Quarter” and the “ 2016 Quarter,” respectively and the six months ended June 30, 2017 and June 30, 2016 as the "2017 Period" and "2016 Period," respectively
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, 2017
Real Estate [Abstract]
Schedule of Real Estate Property Acquired [Table Text Block]	We acquired the following property during the 2017 Quarter (the “2017 acquisition”): Acquisition Date Property Type Net Rentable Square Feet Contract Purchase Price (In thousands) April 4, 2017 Watergate 600 Office 289,000 $ 135,000
Revenue and Earnings From Acquisition [Table Text Block]	The results of operations from the 2017 acquisition are included in the consolidated statements of income from the acquisition date and are as follows (in thousands): Three and Six Months Ended June 30, 2017 Real estate rental revenue $ 4,902 Net income 964
Total Purchase Price Of Acquisitions [Table Text Block]	We have recorded the total cost of the 2017 acquisition as follows (in thousands): Land $ 45,981 Building 66,241 Tenant origination costs 12,084 Leasing commissions/absorption costs 23,161 Lease intangible assets 498 Lease intangible liabilities (9,585 ) Deferred tax liability (560 ) Total $ 137,820
Schedule of Assets of Joint Venture	As of June 30, 2017 and December 31, 2016 , The Maxwell’s assets were as follows (in thousands): June 30, 2017 December 31, 2016 Land $ 12,851 $ 12,851 Income producing property 37,955 37,949 Accumulated depreciation and amortization (5,689 ) (4,571 ) Other assets 536 456 $ 45,653 $ 46,685
Schedule of Accounts Payable and Accrued Liabilities of Joint Ventures	As of June 30, 2017 and December 31, 2016 , The Maxwell’s liabilities were as follows (in thousands): June 30, 2017 December 31, 2016 Mortgage notes payable (1) $ 31,690 $ 31,869 Accounts payable and other liabilities 199 186 Tenant security deposits 89 99 $ 31,978 $ 32,154 (1) The mortgage notes payable balances as of June 30, 2017 and December 31, 2016 are eliminated in consolidation due to the purchase of the loan by Washington REIT in January 2016.
Schedule of Dispositions	We sold the following properties in 2016 : Disposition Date Property Name Segment Number of Units/ Rentable Square Feet Contract Gain on Sale May 26, 2016 Dulles Station II (1) Office N/A $ 12,100 $ 527 June 27, 2016 Maryland Office Portfolio Transaction I (2) Office 692,000 111,500 23,585 September 22, 2016 Maryland Office Portfolio Transaction II (3) Office 491,000 128,500 77,592 Total 2016 1,183,000 $ 252,100 $ 101,704 (1) Land held for future development and an interest in a parking garage. (2) Maryland Office Portfolio Transaction I consists of 6110 Executive Boulevard, 600 Jefferson Plaza, Wayne Plaza and West Gude Drive. (3) Maryland Office Portfolio Transaction II consists of 51 Monroe Street and One Central Plaza.
Disposal Groups, Including Discontinued Operations	Real estate rental revenue and net income for the Maryland Office Portfolio for the three and six months ended June 30, 2017 and 2016 are as follows: Three Months Ended June 30, Six Months Ended June 30, 2017 2016 2017 2016 Real estate rental revenue $ — $ 8,147 $ — $ 16,577 Net income — 4,176 — 6,902

Unsecured Lines of Credit Pay22

Unsecured Lines of Credit Payable (Tables)	6 Months Ended
	Jun. 30, 2017
Unsecured Debt [Abstract]
Unsecured Lines Of Credit Unused And Available [Table Text Block]	The amount of the Revolving Credit Facility’s unsecured line of credit unused and available at June 30, 2017 is as follows (in thousands): Committed capacity $ 600,000 Borrowings outstanding (228,000 ) Unused and available $ 372,000
Lines Of Credit Repayments And Borrowings [Table Text Block]	We executed borrowings and repayments on the Revolving Credit Facility during the 2017 Period as follows (in thousands): Revolving Credit Facility Balance at December 31, 2016 $ 120,000 Borrowings 239,000 Repayments (131,000 ) Balance at June 30, 2017 $ 228,000

Derivative Instruments (Tables)

Derivative Instruments (Tables)	6 Months Ended
	Jun. 30, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Derivative Assets at Fair Value	The fair values of the interest rate swaps as of June 30, 2017 and December 31, 2016 , are as follows (in thousands): Fair Value Asset Derivatives Derivative Instrument Aggregate Notional Amount Effective Date Maturity Date June 30, 2017 December 31, 2016 Interest rate swaps $ 150,000 October 15, 2015 March 15, 2021 $ 578 $ 417 Interest rate swaps 150,000 March 31, 2017 July 21, 2023 6,279 7,194 $ 300,000 $ 6,857 $ 7,611
Schedule of Derivative Instruments, Effect on Other Comprehensive Income (Loss)	The interest rate swaps have been effective since inception. The net gains or losses on the effective swaps are recognized in other comprehensive income (loss), as follows (in thousands): Three Months Ended June 30, Six Months Ended June 30, 2017 2016 2017 2016 Unrealized loss on interest rate hedges $ (1,489 ) $ (1,384 ) $ (754 ) $ (5,059 )

Fair Value Disclosures (Tables)

Fair Value Disclosures (Tables)	6 Months Ended
	Jun. 30, 2017
Fair Value Disclosures [Abstract]
Financial Assets and Liabilities Measured at Fair Value	The fair values of these assets and liabilities at June 30, 2017 and December 31, 2016 were as follows (in thousands): June 30, 2017 December 31, 2016 Fair Value Level 1 Level 2 Level 3 Fair Value Level 1 Level 2 Level 3 Assets: SERP $ 1,593 $ — $ 1,593 $ — $ 1,407 $ — $ 1,407 $ — Interest rate swaps $ 6,857 $ — $ 6,857 $ — $ 7,611 $ — $ 7,611 $ —
Financial Assets and Liabilities Not Measured at Fair Value	As of June 30, 2017 and December 31, 2016 , the carrying values and estimated fair values of our financial instruments were as follows (in thousands): June 30, 2017 December 31, 2016 Carrying Value Fair Value Carrying Value Fair Value Cash and cash equivalents $ 13,237 $ 13,237 $ 11,305 $ 11,305 Restricted cash 1,506 1,506 6,317 6,317 2445 M Street note receivable 2,096 2,324 2,089 2,173 Mortgage notes payable, net 96,934 100,130 148,540 149,997 Lines of credit 228,000 228,000 120,000 120,000 Notes payable, net 893,763 925,915 843,084 873,516

Earnings per Common Share (Tabl

Earnings per Common Share (Tables)	6 Months Ended
	Jun. 30, 2017
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, 2017 and 2016 were as follows (in thousands, except per share data): Three Months Ended June 30, Six Months Ended June 30, 2017 2016 2017 2016 Numerator: Net income $ 7,847 $ 31,821 $ 14,462 $ 34,200 Net loss attributable to noncontrolling interests in subsidiaries 17 15 36 20 Allocation of earnings to unvested restricted share awards (107 ) (99 ) (184 ) (155 ) Adjusted net income attributable to the controlling interests $ 7,757 $ 31,737 $ 14,314 $ 34,065 Denominator: Weighted average shares outstanding – basic 76,705 71,719 75,785 70,010 Effect of dilutive securities: Operating partnership units 11 — 6 — Employee restricted share awards 114 193 112 190 Weighted average shares outstanding – diluted 76,830 71,912 75,903 70,200 Basic net income attributable to the controlling interests per common share $ 0.10 $ 0.44 $ 0.19 $ 0.49 Diluted net income attributable to the controlling interests per common share $ 0.10 $ 0.44 $ 0.19 $ 0.49

Segment Information (Tables)

Segment Information (Tables)	6 Months Ended
	Jun. 30, 2017
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, 2017 and 2016 from these segments, and reconcile net operating income of reportable segments to net income attributable to the controlling interests as reported (in thousands): Three Months Ended June 30, 2017 Office Retail Multifamily Corporate and Other Consolidated Real estate rental revenue $ 44,109 $ 15,512 $ 23,835 $ — $ 83,456 Real estate expenses 15,853 3,597 9,241 — 28,691 Net operating income $ 28,256 $ 11,915 $ 14,594 $ — $ 54,765 Depreciation and amortization (29,261 ) General and administrative (5,759 ) Interest expense (12,053 ) Other income 48 Income tax benefit 107 Net income 7,847 Less: Net loss attributable to noncontrolling interests in subsidiaries 17 Net income attributable to the controlling interests $ 7,864 Capital expenditures $ 5,864 $ 62 $ 6,561 $ 1,375 $ 13,862 Total assets $ 1,241,618 $ 344,523 $ 766,972 $ 34,999 $ 2,388,112 Three Months Ended June 30, 2016 Office Retail Multifamily Corporate and Other Consolidated Real estate rental revenue $ 43,737 $ 15,080 $ 20,588 $ — $ 79,405 Real estate expenses 16,594 3,684 7,897 — 28,175 Net operating income $ 27,143 $ 11,396 $ 12,691 $ — $ 51,230 Depreciation and amortization (25,161 ) Acquisition costs (1,024 ) General and administrative (4,968 ) Interest expense (13,820 ) Other income 83 Gain on sale of real estate 24,112 Income tax benefit 693 Casualty gain 676 Net income 31,821 Less: Net loss attributable to noncontrolling interests in subsidiaries 15 Net income attributable to the controlling interests $ 31,836 Capital expenditures $ 5,854 $ 3,588 $ 2,198 $ 29 $ 11,669 Total assets $ 1,151,041 $ 352,094 $ 769,592 $ 33,724 $ 2,306,451 Six Months Ended June 30, 2017 Office Retail Multifamily Corporate Consolidated Real estate rental revenue $ 82,136 $ 31,217 $ 47,604 $ — $ 160,957 Real estate expenses 30,267 7,460 18,827 — 56,554 Net operating income $ 51,869 $ 23,757 $ 28,777 $ — $ 104,403 Depreciation and amortization (55,330 ) General and administrative (11,385 ) Interest expense (23,458 ) Other income 125 Income tax benefit 107 Net income 14,462 Less: Net loss attributable to noncontrolling interests in subsidiaries 36 Net income attributable to the controlling interests $ 14,498 Capital expenditures $ 10,819 $ 246 $ 12,858 $ 1,950 $ 25,873 Six Months Ended June 30, 2016 Office Retail Multifamily Corporate Consolidated Real estate rental revenue $ 87,555 30,460 $ 38,527 $ — $ 156,542 Real estate expenses 33,669 8,090 15,150 — 56,909 Net operating income 53,886 $ 22,370 $ 23,377 $ — $ 99,633 Depreciation and amortization (51,199 ) Acquisition costs (1,178 ) General and administrative (10,479 ) Interest expense (28,180 ) Other income 122 Gain on sale of real estate 24,112 Income tax benefit 693 Casualty gain 676 Net income 34,200 Less: Net loss attributable to noncontrolling interests in subsidiaries 20 Net income attributable to the controlling interests $ 34,220 Capital expenditures $ 8,025 $ 4,131 $ 4,200 $ 42 $ 16,398

Nature of Business - Narrative

Nature of Business - Narrative (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Dec. 31, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Percentage of distribution of ordinary taxable income	90.00%
Watergate 600 [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Deferred tax liability recognized in connection with acquisition	$ 560
Taxable Reit Subsidiary [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Deferred tax assets net of valuation allowance	600	$ 500
Deferred tax assets, valuation allowance	2,700	2,900
Deferred tax liabilities, net	$ 1,000	$ 400

Real Estate - Schedule of Acqui

Real Estate - Schedule of Acquisitions (Details) $ in Thousands	3 Months Ended
	Jun. 30, 2017USD ($)ft²	Dec. 31, 2016USD ($)
Real Estate [Line Items]
Contract Purchase Price	$ 2,818,290	$ 2,685,403
Series of Individually Immaterial Business Acquisitions [Member] | Watergate 600 [Member]
Real Estate [Line Items]
Net Rentable Square Feet | ft²	289,000
Contract Purchase Price	$ 135,000

Real Estate - Revenue and Earni

Real Estate - Revenue and Earnings of Acquisitions (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Real Estate [Line Items]
Real estate rental revenue	$ 83,456	$ 79,405	$ 160,957	$ 156,542
Net income	$ 7,847	$ 31,821	14,462	$ 34,200
Series of Individually Immaterial Business Acquisitions [Member]
Real Estate [Line Items]
Real estate rental revenue			4,902
Net income			$ 964

Real Estate - Schedule of Asset

Real Estate - Schedule of Assets Acquired (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Real Estate [Line Items]
Payments to Acquire Real Estate	$ 138,371	$ 227,413
Business Acquisition, Equity Interest Issued or Issuable, Value Assigned	376
Watergate 600 [Member]
Real Estate [Line Items]
Payments to Acquire Land	45,981
Payments to Acquire Building	66,241
Tenant origination costs	12,084
Leasing commissions absorption costs	23,161
Net lease intangible assets	498
Net lease intangible liabilities	(9,585)
Deferred tax liability	$ (560)
Watergate 600 [Member] | Tenant Origination Costs [Member]
Real Estate [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	92 months
Watergate 600 [Member] | Leasing Commissions Absorption Costs [Member]
Real Estate [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	84 months
Watergate 600 [Member] | Net lease intangible assets [Member]
Real Estate [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	19 months
Watergate 600 [Member] | Net lease intangible liability [Member]
Real Estate [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	97 months
Series of Individually Immaterial Business Acquisitions [Member]
Real Estate [Line Items]
Real Estate Investment Property, at Cost, Net of Adjustments	$ 137,820
Series of Individually Immaterial Business Acquisitions [Member] | Watergate 600 [Member]
Real Estate [Line Items]
Real Estate Investment Property, at Cost, Net of Adjustments	135,000
Business acquisition, transaction costs	2,800
Other Payments to Acquire Businesses	$ 1,000
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares	12,124
Business Acquisition, Equity Interest Issued or Issuable, Value Assigned	$ 400	$ 0
Duration for average share price valuation (in days)	20 days

Real Estate - Development_Redev

Real Estate - Development/Redevelopment (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Real Estate Properties [Line Items]
Properties under development or held for future development	$ 46,154	$ 40,232
Real estate investment property, at cost	2,818,290	$ 2,685,403
Army Navy Building [Domain]
Real Estate Properties [Line Items]
Properties under development or held for future development	4,100
Real estate investment property, at cost	3,400
The Wellington land parcel [Member]
Real Estate Properties [Line Items]
Properties under development or held for future development	23,800
Riverside Developments [Member]
Real Estate Properties [Line Items]
Properties under development or held for future development	18,300
Spring Vally Retail Center [Member]
Real Estate Properties [Line Items]
Properties under development or held for future development	$ 1,600

Real Estate - Variable Interest

Real Estate - Variable Interest Entities (Details) - USD ($) $ in Thousands		6 Months Ended
		Jun. 30, 2017	Dec. 31, 2016
Real Estate Properties [Line Items]
Land		$ 616,444	$ 573,315
Accounts payable and other liabilities		60,165	46,967
Tenant security deposits		$ 9,263	8,802
Six Fifty North Glebe Road [Member]
Real Estate Properties [Line Items]
Variable interest entity, qualitative or quantitative information, ownership percentage		90.00%
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners		10.00%
Land		$ 12,851	12,851
Income producing property		37,955	37,949
Accumulated depreciation and amortization		(5,689)	(4,571)
Other assets		536	456
Real Estate Investments, Joint Ventures		45,653	46,685
Mortgage notes payable (1)	[1]	31,690	31,869
Accounts payable and other liabilities		199	186
Tenant security deposits		89	99
Accounts payable and accrued liabilities related to joint ventures		$ 31,978	$ 32,154
[1]	The mortgage notes payable balances as of June 30, 2017 and December 31, 2016 are eliminated in consolidation due to the purchase of the loan by Washington REIT in January 2016.

Real Estate - Held for Sale and

Real Estate - Held for Sale and Sold Properties (Details) $ in Thousands		3 Months Ended		6 Months Ended		12 Months Ended
		Jun. 30, 2017USD ($)	Jun. 30, 2016USD ($)	Jun. 30, 2017USD ($)	Jun. 30, 2016USD ($)	Dec. 31, 2016USD ($)ft²
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Rentable Square Feet | ft²						1,183,000
Disposal Group, Contract Sales Price						$ 252,100
Gain on sale of real estate		$ 0	$ 24,112	$ 0	$ 24,112	101,704
Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] | Dulles Station II [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal Group, Contract Sales Price	[1]					12,100
Gain on sale of real estate	[1]					527
Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] | Maryland Office Portfolio Transaction I [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal Group, Contract Sales Price	[2]					111,500
Gain on sale of real estate	[2]					23,585
Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] | Maryland Office Portfolio Transaction II [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal Group, Contract Sales Price	[3]					128,500
Gain on sale of real estate	[3]					$ 77,592
Office [Member] | Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] | Maryland Office Portfolio Transaction I [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Rentable Square Feet | ft²	[2]					692,000
Office [Member] | Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] | Maryland Office Portfolio Transaction II [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Rentable Square Feet | ft²	[3]					491,000
[1]	Land held for future development and an interest in a parking garage.
[2]	Maryland Office Portfolio Transaction I consists of 6110 Executive Boulevard, 600 Jefferson Plaza, Wayne Plaza and West Gude Drive.
[3]	Maryland Office Portfolio Transaction II consists of 51 Monroe Street and One Central Plaza.

Real Estate - Disposal Group re

Real Estate - Disposal Group revenue and net income (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Real Estate [Abstract]
Real estate rental revenue	$ 0	$ 8,147	$ 0	$ 16,577
Net income	$ 0	$ 4,176	$ 0	$ 6,902

Mortgage Notes Payable (Details

Mortgage Notes Payable (Details) - USD ($) $ in Thousands	1 Months Ended	6 Months Ended
	Feb. 28, 2017	Jun. 30, 2017	Jun. 30, 2016
Debt Instrument [Line Items]
Repayments of Notes Payable		$ 51,075	$ 166,216
The Army Navy Club Building Member
Debt Instrument [Line Items]
Repayments of Notes Payable	$ 49,600

Unsecured Lines of Credit Pay36

Unsecured Lines of Credit Payable - Narrative (Details)	6 Months Ended
	Jun. 30, 2017USD ($)	Sep. 30, 2015USD ($)
Line of Credit
Line of Credit Facility [Line Items]
Line of Credit Facility, Commitment Fee Percentage	0.20%
Line of Credit Facility, Interest Rate During Period	1.00%
Revolving Credit Facility
Line of Credit Facility [Line Items]
Committed capacity	$ 1,000,000,000
Revolving Credit Facility | 2015 Term Loan [Member]
Line of Credit Facility [Line Items]
Long-term Line of Credit, Noncurrent		$ 150,000,000
Debt Instrument, Term	5 years 6 months
Revolving Credit Facility | Line of Credit
Line of Credit Facility [Line Items]
Committed capacity	$ 600,000,000
Debt Instrument, Maturity Date	Jun. 22, 2019
line of credit facility, number of extensions allowed	2
Line of Credit Facility, extension period	6 months
Minimum [Member] | Line of Credit
Line of Credit Facility [Line Items]
Line of Credit Facility, Commitment Fee Percentage	0.125%
Maximum [Member] | Line of Credit
Line of Credit Facility [Line Items]
Line of Credit Facility, Commitment Fee Percentage	0.30%
London Interbank Offered Rate (LIBOR) [Member] | 2015 Term Loan [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Description of Variable Rate Basis	P1M
London Interbank Offered Rate (LIBOR) [Member] | Line of Credit
Line of Credit Facility [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.00%
London Interbank Offered Rate (LIBOR) [Member] | Revolving Credit Facility | 2015 Term Loan [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.10%
London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member] | Line of Credit
Line of Credit Facility [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.875%
London Interbank Offered Rate (LIBOR) [Member] | Maximum [Member] | Line of Credit
Line of Credit Facility [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.55%
Base Rate [Member] | Minimum [Member] | Line of Credit
Line of Credit Facility [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.00%
Base Rate [Member] | Maximum [Member] | Line of Credit
Line of Credit Facility [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.55%
Federal Funds Effective Swap Rate [Member] | Line of Credit
Line of Credit Facility [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.50%
Interest Rate Swap [Member] | 2015 Term Loan [Member]
Line of Credit Facility [Line Items]
Derivative, Number of Instruments Held	2

Unsecured Lines of Credit Pay37

Unsecured Lines of Credit Payable - Schedule of Credit Unused and Available (Details) - USD ($)	Jun. 30, 2017	Dec. 31, 2016
Line of Credit Facility [Line Items]
Borrowings outstanding	$ (228,000,000)	$ (120,000,000)
Revolving Credit Facility
Line of Credit Facility [Line Items]
Committed capacity	1,000,000,000
Line of Credit | Revolving Credit Facility
Line of Credit Facility [Line Items]
Committed capacity	600,000,000
Borrowings outstanding	(228,000,000)	$ (120,000,000)
Unused and available	$ 372,000,000

Unsecured Lines of Credit Pay38

Unsecured Lines of Credit Payable - Line of Credit Facility, Increase (decrease), net (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2017USD ($)
Line of Credit Facility, Increase (Decrease) During the Period [Roll Forward]
Balance at December 31, 2016	$ 120,000
Balance at June 30, 2017	228,000
Revolving Credit Facility | Line of Credit
Line of Credit Facility, Increase (Decrease) During the Period [Roll Forward]
Balance at December 31, 2016	120,000
Borrowings	239,000
Repayments	(131,000)
Balance at June 30, 2017	$ 228,000

Note Payable (Details)

Note Payable (Details) - USD ($)	3 Months Ended	6 Months Ended	12 Months Ended
	Mar. 31, 2017	Jun. 30, 2017	Dec. 31, 2016
2016 Term Loan [Member] | London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate		1.00%
2016 Term Loan [Member] | London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate		1.50%
2016 Term Loan [Member] | London Interbank Offered Rate (LIBOR) [Member] | Maximum [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate		2.45%
2016 Term Loan [Member] | Base Rate [Member] | Minimum [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate		0.50%
2016 Term Loan [Member] | Base Rate [Member] | Maximum [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate		1.45%
2016 Term Loan [Member] | Federal Funds Effective Swap Rate [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate		0.50%
Unsecured Debt [Member] | 2016 Term Loan [Member]
Debt Instrument [Line Items]
Debt Instrument, Term			7 years
Debt Instrument, Face Amount			$ 150,000,000
Debt Instrument, Maturity Date			Jul. 21, 2023
Debt Instrument, Deferred Draw Period			6 months
Unsecured Long-term Debt, Noncurrent			$ 100,000,000
Proceeds from Issuance of Unsecured Debt	$ 50,000,000
Derivative, Fixed Interest Rate		2.90%
Unsecured Debt [Member] | 2016 Term Loan [Member] | London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate		1.65%
2015 Term Loan [Member] | London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Debt Instrument, Description of Variable Rate Basis		P1M

Derivative Instruments - Narrat

Derivative Instruments - Narrative (Details) - USD ($)	6 Months Ended
	Jun. 30, 2017	Jul. 22, 2016	Sep. 15, 2015
Derivative Instruments, Gain (Loss) [Line Items]
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months	$ 200,000
Interest Rate Swap [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Notional Amount	300,000,000
Interest rate swaps, fair value	$ 6,900,000
2015 Term Loan [Member] | Interest Rate Swap [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Number of Instruments Held			2
Derivative, Notional Amount			$ 150,000,000
Derivative, Fixed Interest Rate			2.70%
2016 Term Loan [Member] | Interest Rate Swap [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Number of Instruments Held		2
Derivative, Notional Amount		$ 150,000,000
Derivative, Fixed Interest Rate		2.90%

Derivative Instruments - Schedu

Derivative Instruments - Schedule of Derivative Liability at Fair Value (Details) - Interest Rate Swap [Member] - USD ($)	Jun. 30, 2017	Dec. 31, 2016	Jul. 22, 2016	Sep. 15, 2015
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	$ 300,000,000
Interest rate swaps	6,857,000	$ 7,611,000
Prepaid expenses and other assets [Member]
Derivatives, Fair Value [Line Items]
Interest rate swaps	6,857,000	7,611,000
2015 Term Loan [Member]
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount				$ 150,000,000
2015 Term Loan [Member] | Prepaid expenses and other assets [Member]
Derivatives, Fair Value [Line Items]
Interest rate swaps	578,000	417,000
2016 Term Loan [Member]
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount			$ 150,000,000
2016 Term Loan [Member] | Prepaid expenses and other assets [Member]
Derivatives, Fair Value [Line Items]
Interest rate swaps	$ 6,279,000	$ 7,194,000

Derivative Instruments - Sche42

Derivative Instruments - Schedule of Gains (Losses) on Derivatives (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Interest Rate Swap [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized loss on interest rate hedges	$ (1,489)	$ (1,384)	$ (754)	$ (5,059)

Fair Value Disclosures - Financ

Fair Value Disclosures - Financial Assets and Liabilities Measured at Fair Value (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Supplemental Employee Retirement Plan [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
SERP	$ 1,593	$ 1,407
Supplemental Employee Retirement Plan [Member] | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
SERP	0	0
Supplemental Employee Retirement Plan [Member] | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
SERP	1,593	1,407
Supplemental Employee Retirement Plan [Member] | Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
SERP	0	0
Interest Rate Swap [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest rate swaps	6,857	7,611
Interest Rate Swap [Member] | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest rate swaps	0	0
Interest Rate Swap [Member] | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest rate swaps	6,857	7,611
Interest Rate Swap [Member] | Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest rate swaps	$ 0	$ 0

Fair Value Disclosures - Fina44

Fair Value Disclosures - Financial Assets and Liabilities Not Measured at Fair Value (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Dec. 31, 2016
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Commercial Paper, Maturity	90
Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	$ 13,237	$ 11,305
Restricted cash	1,506	6,317
Mortgage notes payable, net	96,934	148,540
Lines of credit	228,000	120,000
Notes payable, net	893,763	843,084
Carrying Value | 2445 M Street note receivable
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
2445 M Street note receivable	2,096	2,089
Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	13,237	11,305
Restricted cash	1,506	6,317
Mortgage notes payable, net	100,130	149,997
Lines of credit	228,000	120,000
Notes payable, net	925,915	873,516
Fair Value | 2445 M Street note receivable
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
2445 M Street note receivable	$ 2,324	$ 2,173

Stock Based Compensation (Detai

Stock Based Compensation (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ 1.2	$ 0.9	$ 2.4	$ 2.4
Restricted Share Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of share grants vested			$ 2	$ 2.5
Total unvested restricted share awards (in shares)	356,093		356,093
Weighted average grant date fair value (in dollars per share)	$ 30.85		$ 30.85
Total compensation costs, non-vested restricted share awards	$ 8.3		$ 8.3
Total compensation cost not yet recognized, period for recognition (in months)			39 months
Washington Real Estate Investment Trust 2016 Omnibus Long Term Incentive Plan [Domain]
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, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Earnings Per Share [Abstract]
Net income	$ 7,847	$ 31,821	$ 14,462	$ 34,200
Less: Net loss attributable to noncontrolling interests in subsidiaries	17	15	36	20
Allocation of earnings to unvested restricted share awards	(107)	(99)	(184)	(155)
Adjusted net income attributable to the controlling interests	$ 7,757	$ 31,737	$ 14,314	$ 34,065
Weighted average shares outstanding - basic (in shares)	76,705	71,719	75,785	70,010
Operating partnership units	11	0	6	0
Employee restricted share awards	114	193	112	190
Weighted average shares outstanding - diluted (in shares)	76,830	71,912	75,903	70,200
Basic net income attributable to the controlling interests per common share( in dollars per share)	$ 0.10	$ 0.44	$ 0.19	$ 0.49
Diluted net income attributable to the controlling interests per common share (in dollars per share)	$ 0.10	$ 0.44	$ 0.19	$ 0.49

Segment Information - Segment S

Segment Information - Segment Schedules (Details) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2017USD ($)	Jun. 30, 2016USD ($)	Jun. 30, 2017USD ($)segment	Jun. 30, 2016USD ($)	Dec. 31, 2016USD ($)
Segment Reporting [Abstract]
Number of reportable segments | segment			3
Segment Reporting Information [Line Items]
Real estate rental revenue	$ 83,456	$ 79,405	$ 160,957	$ 156,542
Real estate expenses	28,691	28,175	56,554	56,909
Net operating income	54,765	51,230	104,403	99,633
Depreciation and amortization	(29,261)	(25,161)	(55,330)	(51,199)
Acquisition costs	0	(1,024)	0	(1,178)
General and administrative	(5,759)	(4,968)	(11,385)	(10,479)
Interest expense	(12,053)	(13,820)	(23,458)	(28,180)
Other income	48	83	125	122
Gain on sale of real estate	0	24,112	0	24,112	$ 101,704
Income tax benefit	(107)	(693)	(107)	(693)
Casualty gain	0	676	0	676
Net income	7,847	31,821	14,462	34,200
Less: Net loss attributable to noncontrolling interests in subsidiaries	17	15	36	20
Net income attributable to the controlling interests	7,864	31,836	14,498	34,220
Capital expenditures	13,862	11,669	25,873	16,398
Total assets	2,388,112	2,306,451	2,388,112	2,306,451	$ 2,253,619
Office
Segment Reporting Information [Line Items]
Real estate rental revenue	44,109	43,737	82,136	87,555
Real estate expenses	15,853	16,594	30,267	33,669
Net operating income	28,256	27,143	51,869	53,886
Capital expenditures	5,864	5,854	10,819	8,025
Total assets	1,241,618	1,151,041	1,241,618	1,151,041
Retail
Segment Reporting Information [Line Items]
Real estate rental revenue	15,512	15,080	31,217	30,460
Real estate expenses	3,597	3,684	7,460	8,090
Net operating income	11,915	11,396	23,757	22,370
Capital expenditures	62	3,588	246	4,131
Total assets	344,523	352,094	344,523	352,094
Multifamily
Segment Reporting Information [Line Items]
Real estate rental revenue	23,835	20,588	47,604	38,527
Real estate expenses	9,241	7,897	18,827	15,150
Net operating income	14,594	12,691	28,777	23,377
Capital expenditures	6,561	2,198	12,858	4,200
Total assets	766,972	769,592	766,972	769,592
Corporate and Other
Segment Reporting Information [Line Items]
Real estate rental revenue	0	0	0	0
Real estate expenses	0	0	0	0
Net operating income	0	0	0	0
Capital expenditures	1,375	29	1,950	42
Total assets	$ 34,999	$ 33,724	$ 34,999	$ 33,724

Shareholders' Equity (Details)

Shareholders' Equity (Details)	3 Months Ended	6 Months Ended
	Jun. 30, 2017USD ($)$ / sharesshares	Jun. 30, 2017USD ($)$ / sharesshares	Jun. 30, 2016USD ($)	Jun. 23, 2015USD ($)agreements
Class of Stock [Line Items]
Number of separate equity distribution agreements | agreements				4
Net proceeds from equity issuances		$ 63,906,000	$ 143,357,000
Shares issued under dividend reinvestment program		$ 1,796,000
Common Stock [Member]
Class of Stock [Line Items]
Capital shares reserved for future issuances				$ 200,000,000
Stock Issued During Period, Shares, New Issues | shares	1,100,000	2,070,000
Stock Issued During Period, Weighted Average Price | $ / shares	$ 31.55	$ 31.44
Net proceeds from equity issuances	$ 33,900,000	$ 63,900,000
Shares issued under dividend reinvestment program (in shares) | shares	21,499	56,000
Stock issued during period, weighted share price, Dividend Reinstated Plan | $ / shares	$ 31.95	$ 32.03
Shares issued under dividend reinvestment program	$ 700,000