10-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

___________________________________________________

FORM 10-K

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

For fiscal year ended December 31, 2016

OR

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

COMMISSION FILE NO. 001-06622

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WASHINGTON REAL ESTATE INVESTMENT TRUST

(Exact name of registrant as specified in its charter)

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MARYLAND	53-0261100
(State of incorporation)	(IRS Employer Identification Number)

1775 EYE STREET, NW, SUITE 1000, WASHINGTON, DC 20006

(Address of principal executive office) (Zip code)

Registrant’s telephone number, including area code: (202) 774-3200

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Securities registered pursuant to Section 12(b) of the Act:

Title of Each Class	Name of exchange on which registered
Shares of Beneficial Interest	New York Stock Exchange

Securities registered pursuant to Section 12(g) of the Act: None

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Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.

YES  x    NO  o

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act.

YES  o    NO  x

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or such shorter period that the registrant was required to file such reports) and (2) has been subject to such filing requirements for the past ninety (90) days.    YES  x    NO  o

Indicate by checkmark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).    YES  x    NO  o

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K is not contained herein, and will not be contained, to the best of the registrant's knowledge in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K.    o

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer or a smaller reporting company. See definition of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer	x	Accelerated filer	o
Non-accelerated filer	o	Smaller reporting company	o

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Act).    YES  o    NO  x

As of June 30, 2016, the aggregate market value of such shares held by non-affiliates of the registrant was $2,304,199,990 (based on the closing price of the stock on June 30, 2016).

As of February 16, 2017, 74,711,571 common shares were outstanding.

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DOCUMENTS INCORPORATED BY REFERENCE

Portions of our definitive Proxy Statement relating to the 2017 Annual Meeting of Shareholders, to be filed with the Securities and Exchange Commission, are incorporated by reference in Part III, Items 10-14 of this Annual Report on Form 10-K as indicated herein.

WASHINGTON REAL ESTATE INVESTMENT TRUST

2016 FORM 10-K ANNUAL REPORT

INDEX

PART I			Page
	Item 1.	Business	4
	Item 1A.	Risk Factors	9
	Item 1B.	Unresolved Staff Comments	24
	Item 2.	Properties	25
	Item 3.	Legal Proceedings	26
	Item 4.	Mine Safety Disclosures	27
PART II
	Item 5.	Market for the Registrant's Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities	27
	Item 6.	Selected Financial Data	28
	Item 7.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	29
	Item 7A.	Qualitative and Quantitative Disclosures about Market Risk	51
	Item 8.	Financial Statements and Supplementary Data	53
	Item 9.	Changes in and Disagreements with Accountants on Accounting and Financial Disclosure	53
	Item 9A.	Controls and Procedures	53
	Item 9B.	Other Information	53
PART III
	Item 10.	Directors, Executive Officers and Corporate Governance	54
	Item 11.	Executive Compensation	54
	Item 12.	Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters	54
	Item 13.	Certain Relationships and Related Transactions, and Director Independence	54
	Item 14.	Principal Accountant Fees and Services	54
PART IV
	Item 15.	Exhibits and Financial Statement Schedules	55
	Item 16.	Form 10-K Summary	57
		Signatures	58

3

PART I

ITEM 1:  BUSINESS

Washington REIT Overview

Washington Real Estate Investment Trust (“Washington REIT”) is a self-administered equity real estate investment trust (“REIT”) successor to a trust organized in 1960. Our business consists of the ownership and operation of income-producing real property in the greater Washington metro region. We own a diversified portfolio of office buildings, multifamily buildings and retail centers.

Our current strategy is to generate returns and maximize shareholder value through proactive asset management and prudent capital allocation decisions. Consistent with this strategy, we invest in additional income-producing properties through acquisitions, development and redevelopment. We invest in properties in which we believe we will be able to improve the operating results and increase the value of the property. We focus 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 will seek to continue to upgrade our portfolio as opportunities arise, funding acquisitions with a combination of cash, equity, debt and proceeds from property sales.

While we have historically focused most of our investments in the greater Washington metro region, in order to maximize acquisition opportunities we also may consider opportunities to replicate our Washington-focused approach in other geographic markets which meet the criteria described above.

All of our officers and employees live and work in or near the greater Washington metro region.

Our Regional Economy and Real Estate Markets

The Washington metro region experienced strong job growth during 2016 with approximately 72,600 net job additions, according to the Bureau of Labor Statistics. The professional and business services sector lead the region in job growth, accounting for 32% of the net job additions, while the federal government accounted for approximately 6,300 net job additions, the most since 2010. Current estimates by Delta Associates / Transwestern Commercial Services (“Delta”), a national full service real estate firm that provides market research and evaluation services for commercial property, indicate that the region's unemployment rate was 3.9% as of October 2016, down from 4.2% in October of the prior year and lower than the national average of 4.4%. Despite uncertainties about the policies of the new presidential administration and their effects on the region's economy, Delta expects the strong job growth to continue in 2017. Certain market statistics and information from several third party providers for the Washington metro region are set forth below:

Office

	2016		2015
Increase in average effective rents	0.7	%	1.3	%
Direct vacancy rate at year end	16.1	%	16.2	%
Net absorption (in millions of square feet) (1)	1.1		1.2
Office space under construction at year end (in millions of square feet)	10.0		6.8

Source: Jones Lang LaSalle, "JLL," a commercial real estate services firm

⁽¹⁾ Net absorption is defined as the change in occupied, standing inventory from one year to the next.

According to JLL, a commercial real estate firm, the lower increase in average rental rates in the Washington metro region was primarily due to weakness in the Maryland and Virginia suburbs (-0.4% and 0.5%, respectively), while Washington, DC average rental rates increased by 1.6%. The 2016 direct vacancy rate is similar to the prior year, and above the national average of 13.3%. Direct vacancy is higher in the Virginia and Maryland suburbs (19.1% and 17.9%, respectively), while direct vacancy in Washington, DC was 11.2%. JLL projects gradual improvement in office vacancy and effective rents during 2017 due to stronger demand for office space.

4

Multifamily

	2016		2015
Increase in net effective rents (Class A and B)	1.6	%	0.7	%
Increase in net effective rents (Class A)	1.1	%	0.4	%
Stabilized vacancy rate (Class A and B)	3.8	%	4.3	%
Stabilized vacancy rate (Class A)	4.0	%	4.6	%
New apartment deliveries (# of units)	13,263		9,320

Source: MPF Research, a division of RealPage, a commercial real estate management software company that provides market research

According to MPF Research, the multifamily real estate market's low vacancy rate reflects the region's strong demand, though the large influx of new supply has kept rental rate growth below the national average. New apartment deliveries are projected to increase to approximately 17,200 units in 2017, which is expected to negatively impact occupancy and suppress rental rate growth.

Retail

	2016		2015
(Decrease) increase in rental rates at neighborhood centers	(0.1	)%	2.5	%
Vacancy at neighborhood centers at year-end	5.4	%	5.8	%
Net absorption (in millions of square feet)	0.6		0.5

Source: CoStar, a provider of real estate market research and analytics

The retail real estate market in the Washington metro region was mixed in 2016, with a small improvement in vacancy at neighborhood centers offset by slightly lower rental rates, according to CoStar. CoStar projects strong demand to continue in 2017, though additional supply is expected to suppress rental rates.

Our Portfolio

As of December 31, 2016, we owned a diversified portfolio of 49 properties, totaling approximately 6.0 million square feet of commercial space and 4,480 residential units, and land held for development. These 49 properties consist of 19 office properties, 14 multifamily properties and 16 retail centers. The percentage of total real estate rental revenue by segment for the years ended December 31, 2016, 2015 and 2014, and the percent leased as of December 31, 2016, were as follows:

Percent Leased December 31, 2016(2)		% of Total Real Estate Rental  Revenue(1)
		2016		2015		2014
92%	Office	53	%	57	%	57	%
96%	Multifamily	27	%	22	%	22	%
94%	Retail	20	%	21	%	21	%
		100	%	100	%	100	%

⁽¹⁾  Data excludes discontinued operations.

⁽²⁾  Calculated as the percentage of physical net rentable area leased, except for multifamily, which is calculated as the percentage of units leased.

On a combined basis, our commercial portfolio (i.e., our office and retail properties) was 93% leased at December 31, 2016, 93% leased at December 31, 2015 and 91% leased at December 31, 2014.

Total real estate rental revenue from continuing operations for each of the three years ended December 31, 2016 was $313.3 million, $306.4 million and $288.6 million, respectively. During the three years ended December 31, 2016, we acquired two office properties, three multifamily properties (including parcels for development) and one retail property, and substantially completed major construction activities at one multifamily development project and one office redevelopment project. During that same period, we sold six office properties, the remainder of the medical office segment consisting of five medical office properties, two multifamily properties, one retail property, interests in land held for development and a parcel of land at a retail property.

5

The commercial lease expirations for the next ten years and thereafter are as follows:

	# of Leases	Square Feet	Gross Annual Rent (in thousands)		Percentage of Total Gross Annual Rent
Office:
2017	51	466,506	$	18,423	12	%
2018	43	272,505	11,510		8	%
2019	54	547,687	21,838		14	%
2020	45	398,973	19,434		13	%
2021	57	413,066	17,545		11	%
2022	33	339,097	15,922		10	%
2023	30	178,958	7,938		5	%
2024	28	175,417	8,224		5	%
2025	23	156,363	7,909		5	%
2026	16	296,376	9,946		7	%
Thereafter	26	300,087	15,547		10	%
Total	406	3,545,035	$	154,236	100	%
Retail:
2017	33	150,977	$	4,231	8	%
2018	35	331,598	4,739		9	%
2019	34	167,211	4,731		9	%
2020	40	436,469	7,815		15	%
2021	23	218,039	3,892		7	%
2022	30	231,739	5,745		11	%
2023	19	127,301	4,345		8	%
2024	24	164,413	4,643		9	%
2025	17	100,401	2,948		6	%
2026	20	141,245	5,110		10	%
Thereafter	14	80,104	4,141		8	%
Total	289	2,149,497	$	52,340	100	%

According to Delta, the professional/business services and government sectors constituted over 40% of payroll jobs in the Washington metro area at the end of 2016. Due to our geographic concentration in the Washington metro area, a significant number of our tenants have historically been concentrated in the professional/business services and government sectors, although the exact amount will vary from time to time. As a result of this concentration, we are susceptible to business trends (both positive and negative) that affect the outlook for these sectors. Research from JLL shows a historical relationship between tenant demand to lease space in the Washington metro region and the number of bills enacted by the federal government. Historical data compiled by JLL also indicates that when one party is in control of both the executive and legislative branches, a significantly higher number of bills are enacted into law as compared to when control of the legislative and executive branches is divided.

No single tenant accounted for more than 5% of real estate rental revenue in 2016, 2015 or 2014. All federal government tenants in the aggregate accounted for less than 1% of our real estate rental revenue in 2016.

6

Our ten largest tenants, in terms of real estate rental revenue for 2016, are as follows:

1.	Advisory Board Company
2.	World Bank
3.	Squire Patton Boggs (USA) LLP (1)
4.	Engility Corporation
5.	Booz Allen Hamilton, Inc.
6.	Hughes Hubbard & Reed LLP
7.	Morgan Stanley, Smith Barney
8.	Alexandria City School Board
9.	General Services Administration
10.	Eurovision Americas, Inc.

⁽¹⁾ The space at Squire Patton Boggs (USA) LLP is currently subleased to Advisory Board Company, which has signed an extension to make the lease continuous with the remaining Advisory Board Company leases expiring on May 31, 2019. Advisory Board Company is not renewing its leases.

We enter into arrangements from time to time by which various service providers conduct day-to-day property management and/or leasing activities at our properties. Bozzuto Management Company ("Bozzuto") began conducting property management and leasing services at our multifamily properties in the third quarter of 2014. Bozzuto provides such services under individual property management agreements for each property, each of which is separately terminable by us or Bozzuto. The fees charged by Bozzuto under each agreement are approximately 3% of revenues at the property.

We expect to continue investing in additional income-producing properties through acquisitions, development and redevelopment. We invest in properties in which we believe we will be able to improve the operating results and increase the value of the property. Our properties typically compete for tenants with other properties throughout the respective areas in which they are located on the basis of location, quality and rental rates.

We make capital improvements to our properties on an ongoing basis for the purpose of maintaining and increasing their value and income. Major improvements and/or renovations to the properties during the three years ended December 31, 2016 are discussed in Item 7, Management’s Discussion and Analysis of Financial Condition and Results of Operations, under the heading “Capital Improvements and Development Costs.”

Further description of the property groups is contained in Item 2, Properties, and Note 14 to the consolidated financial statements, Segment Information, and in Schedule III. Reference is also made to Item 7, Management’s Discussion and Analysis of Financial Condition and Results of Operations.

On February 16, 2017, we had 153 employees including 77 persons engaged in property management functions and 76 persons engaged in corporate, financial, leasing, asset management and other functions.

REIT Tax Status

We believe that we qualify as a 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 (determined before the deduction for dividends paid and excluding net capital gains), 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, state and local income tax on their taxable income at regular statutory rates (see note 1 to the consolidated financial statements for further disclosure).

7

Tax Treatment of Recent Disposition Activity

We sold our interests in the following properties during the three years ended December 31, 2016:

Property	Type	# of units	Rentable Square Feet	Contract Sales Price (in thousands)		Gain on Sale (in thousands)
Dulles Station, Phase II (1)	Office	N/A	N/A	$	12,100	$	527
Maryland Office Portfolio Transaction I (2)	Office	N/A	692,000	111,500		23,585
Maryland Office Portfolio Transaction II (3)	Office	N/A	491,000	128,500		77,592
	Total 2016		1,183,000	$	252,100	$	101,704
Country Club Towers	Multifamily	227	N/A	$	37,800	$	30,277
1225 First Street (4)	Multifamily	N/A	N/A	14,500		—
Munson Hill Towers	Multifamily	279	N/A	57,050		51,395
Montgomery Village Center	Retail	N/A	197,000	27,750		7,981
	Total 2015	506	197,000	$	137,100	$	89,653	(5)
Medical Office Portfolio Transactions III & IV (6)	Medical Office	N/A	427,000	$	193,561	$	105,985
5740 Columbia Road	Retail	N/A	3,000	1,600		570
	Total 2014		430,000	$	195,161	$	106,555

⁽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.

⁽⁴⁾  95% interest in land held for future development.

⁽⁵⁾  This table of disposition activity does not include the condemnation of 15,000 square feet of land at Montrose Shopping Center as part of an eminent domain taking action. We received $2.0 million as compensation for the taken land, and recognized a $1.4 million gain on sale of real estate in 2015.

⁽⁶⁾  Transactions III and IV of the Medical Office Portfolio purchase and sale agreement consisted of Woodburn Medical Park I and II and Prosperity Medical Center I, II and III.

All disclosed gains on sale are calculated in accordance with U.S. generally accepted accounting principles (“GAAP”). We reinvested a portion of the Maryland Office Portfolio, Medical Office Portfolio, Country Club Towers, Munson Hill Towers and Montgomery Village Center sales proceeds in replacement properties through deferred tax exchanges.

We distributed all of our ordinary taxable income for the three years ended December 31, 2016 to our shareholders.

Availability of Reports

Copies of this Annual Report on Form 10-K, as well as our Quarterly Reports on Form 10-Q, Current Reports on Form 8-K and any amendments to such reports are available, free of charge, on the Internet on our website www.washreit.com. All required reports are made available on the website as soon as reasonably practicable after they are electronically filed with or furnished to the Securities and Exchange Commission. The reference to our website address does not constitute incorporation by reference of the information contained in the website and such information should not be considered part of this document.

8

ITEM 1A: RISK FACTORS

Set forth below are the risks that we believe are material to our shareholders. We refer to the shares of beneficial interest in Washington REIT as our “common shares,” and the investors who own shares as our “shareholders.” This section includes or refers to certain forward-looking statements. You should refer to the explanation of the qualifications and limitations on such forward-looking statements beginning on page 47.

Risks Related to our Business and Operations

Our performance and value are subject to risks associated with our real estate assets and with the real estate industry, which could adversely affect our cash flow and ability to pay distributions to our shareholders.

Our financial performance and the value of our real estate assets are subject to the risk that if our office, retail and multifamily properties do not generate revenues sufficient to meet our operating expenses, debt service and capital expenditures, our cash flow and ability to pay distributions to our shareholders will be adversely affected. The following factors, among others, may adversely affect the cash flow generated by our commercial and multifamily properties:

• downturns in the national, regional and local economic climate;

• declines in the financial condition of our tenants;

• declines in consumer confidence, unemployment rates and consumer tastes and preferences;

• significant job losses in the government or professional/business services industries;

• competition from similar asset type properties;

• the inability or unwillingness of our tenants to pay rent increases;

• changes in market rental rates and related concessions granted to tenants including, but not limited to, free rent and tenant improvement allowances;

• local real estate market conditions, such as oversupply or reduction in demand for office, retail and multifamily properties;

• changes in interest rates and availability of financing;

• increased operating costs, including insurance premiums, utilities and real estate taxes;

• vacancies, changes in market rental rates and the need to periodically repair, renovate and re-let space;

• inflation;

• civil disturbances, earthquakes and other natural disasters, terrorist acts or acts of war; and

• decreases in the underlying value of our real estate.

We are dependent upon the economic and regulatory climate of the Washington metropolitan region, which may impact our profitability.

All of our properties are located in the Washington metro region, which may expose us to a greater amount of market dependent risk than if we were geographically diverse. General economic conditions and local real estate conditions in the Washington metro region are dependent upon various industries that are predominant in our area (such as government and professional/business services). A downturn in one or more of these industries may have a particularly strong effect on the economic climate of our region. Additionally, we are susceptible to adverse developments in the Washington D.C. regulatory environment, such as increases in real estate and other taxes and the costs of complying with governmental regulations or increased regulations. In the event of negative economic and/or regulatory changes in our region, we may experience a negative impact to our profitability and may be limited in our ability to meet our financial obligations when due and/or make distributions to our shareholders.

We may be adversely affected by any significant reductions in federal government spending, which could have an adverse effect on our financial condition and results of operations.

As a REIT operating exclusively in the Washington metro region, a significant portion of our properties is occupied by tenants that are directly or indirectly serving the United States Government as federal contractors or otherwise. A significant reduction in federal government spending, particularly a sudden decrease due to a sequestration process, such as occurred in recent years, could adversely affect the ability of these tenants to fulfill lease obligations or decrease the likelihood that they will renew their leases with us. Further, economic conditions in the Washington metro region are significantly dependent upon the level of federal government spending in the region as a whole. In the event of a significant reduction in federal government spending, there could be negative economic changes in our region which could adversely impact the ability of our tenants to perform their financial obligations under our leases or the likelihood of their lease renewals. As a result, if such a reduction in federal government spending were to occur, we could experience an adverse effect on our financial condition, results of operations, cash flows and ability to make distributions to our shareholders.

9

We face risks associated with property development/redevelopment.

We may, from time to time, engage in development and redevelopment activities, some of which may be significant. Developing or redeveloping properties presents a number of risks for us, including risks that:

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

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

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

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

• the time between commencement of a development project and the stabilization of the completed property exposes us to risks associated with fluctuations in the Washington metro region's economic conditions;

• occupancy rates and rents at the completed property may not meet the expected levels and could be insufficient to make the property profitable; and

• there may not be sufficient development opportunities available.

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

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

We face risks associated with property acquisitions.

We intend to continue to acquire properties which would increase our size and could alter our capital structure. Our acquisition activities and results may be exposed to the following risks:

• we may have difficulty finding properties that are consistent with our strategies and that meet our standards;

• we may have difficulty negotiating with new or existing tenants;

• we may be unable to finance acquisitions on favorable terms or at all;

• the occupancy levels, lease-up timing and rental rates may not meet our expectations;

• even if we enter into an acquisition agreement for a property, we may be unable to complete that acquisition after making a non-refundable deposit and incurring certain other acquisition-related costs;

• competition from other real estate investors may significantly increase the purchase price;

• we may be unable to acquire a desired property because of competition from other real estate investors, including publicly traded real estate investment trusts, institutional investment funds and private investors;

• even if we enter into an acquisition agreement for a property, it is subject to customary conditions to closing, including completion of due diligence investigations which may have findings that are unacceptable;

• the timing of property acquisitions may lag the timing of property dispositions, leading to periods of time where projects' proceeds are not invested as profitably as we desire;

• the acquired properties may fail to perform as we expected in analyzing our investments;

• the actual returns realized on acquired properties may not exceed our cost of capital;

• we may be unable to quickly and efficiently integrate new acquisitions, particularly acquisitions of portfolios of properties, into our existing operations;

• our estimates of capital expenditures required for an acquired property, including the costs of repositioning or redeveloping, may be inaccurate; and

• we could experience a decline in value of the acquired assets after acquisition.

10

We may acquire properties subject to liabilities and without recourse, or with limited recourse with respect to unknown liabilities. As a result, if liability were asserted against us based upon the acquisition of a property, we may have to pay substantial sums to settle it, which could adversely affect our cash flow. Unknown liabilities with respect to properties acquired might include:

• liabilities for clean-up of undisclosed environmental contamination;

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

• liabilities incurred in the ordinary course of business; and

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

We face risks associated with third-party service providers, which could negatively impact our profitability.

We enter into arrangements from time to time by which various service providers conduct day-to-day property management and/or leasing activities at our properties. Failure of such service providers to adequately perform their contracted services could negatively impact our ability to retain tenants or lease vacant space. As a result, any such failure could negatively impact our profitability.    

We may not be able to control our operating expenses or our operating expenses may remain constant or increase, even if our revenues do not increase, causing our financial condition, results of operations, cash flow, per share trading price of our common shares and ability to make distributions to our shareholders to be adversely affected.

Operating expenses associated with owning a property include real estate taxes, insurance, loan payments maintenance, repair and renovation costs, the cost of compliance with governmental regulation (including zoning) and the potential for liability under applicable laws. If our operating expenses increase, our results of operations may be adversely affected. Moreover, operating expenses are not necessarily reduced when circumstances such as market factors, competition or reduced occupancy cause a reduction in revenues from the property. As a result, if revenues decline, we may not be able to reduce our operating expenses associated with the property. If we are unable to control or adjust our operating expenses accordingly, our financial condition, results of operations, cash flow, per share trading price of our common shares and ability to make distributions to our shareholders may be adversely affected.

Our real estate taxes could increase due to property tax rate changes or reassessment, which could impact our cash flows.

Even though we qualify as a REIT for U.S. federal income tax purposes, we are required to pay state and local taxes on our properties. The real property taxes on our properties may increase as property tax rates change or as our properties are assessed or reassessed by taxing authorities. Therefore, the amount of property taxes we pay in the future may increase substantially from what we have paid in the past. If the property taxes we pay increase, our financial condition, results of operations, cash flows, per share market price of our common shares and our ability to satisfy our principal and interest obligations and to make distributions to our shareholders could be adversely affected.

Real estate investments are illiquid, and we may not be able to sell our properties on a timely basis when we determine it is appropriate to do so which could negatively impact our profitability.

Real estate investments can be difficult to sell and convert to cash quickly, especially if market conditions are not favorable. Such illiquidity could limit our ability to quickly change our portfolio of properties in response to changes in economic or other conditions. Moreover, the tax laws applicable to REITs require that we hold our properties for investment, rather than primarily for sale in the ordinary course of business, which may cause us to forego or defer sales of properties that otherwise would be in our best interest. Due to these factors, we may be unable to sell a property at an advantageous time which could negatively impact our profitability.

We face potential difficulties or delays renewing leases or re-leasing space which could impact our financial condition and ability to make distributions.

As of December 31, 2016, the percentage of leased square footage of our commercial properties will expire as set forth in the lease expiration tables on page 6.

Multifamily properties are leased under operating leases with terms of generally one year or less. For each the three years ended December 31, 2016, the multifamily tenant retention rate was 63%, 62% and 60%, respectively.

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We derive substantially all of our income from rent received from tenants. If our tenants decide not to renew their leases, we may not be able to re-lease the space. If tenants decide to renew their leases, the terms of renewals, including the cost of required improvements or concessions, may be less favorable than current lease terms. If the rental rates of our properties decrease, our existing tenants do not renew their leases (refer to the list of our ten largest tenants as of December 31, 2016 on page 7) or we do not re-lease a significant portion of our available and soon-to-be-available space, our financial condition, results of operations, cash flow and our ability to satisfy our principal and interest obligations and to make distributions to our shareholders could be adversely affected.

We face potential adverse effects from major tenants' bankruptcies or insolvencies which could adversely affect our cash flow and results of operations.

The bankruptcy or insolvency of a major tenant may adversely affect the income produced by a property. We cannot evict a tenant solely because of its bankruptcy. On the other hand, a court might authorize the tenant to reject and terminate its lease. In such case, our claim against the bankrupt tenant for unpaid, future rent would be subject to a statutory cap that might be substantially less than the remaining rent actually owed under the lease. As a result, our claim for unpaid rent would likely not be paid in full. This shortfall could adversely affect our cash flow and results of operations. If a tenant experiences a downturn in its business or other types of financial distress, it may be unable to make timely rental payments.

We may suffer economic harm as a result of the actions of our partners in real estate joint ventures and other investments which may adversely affect our operations.

We invest in joint ventures in which we are not the exclusive investor or the only decision maker. Investments in such entities may involve risks not present when a third party is not involved, including the possibility that the other parties to these investments might become bankrupt or fail to fund their share of required capital contributions, and we may be forced to make contributions to maintain the value of the property. Our partners in these entities may have economic, tax or other business interests or goals that are inconsistent with our business interests or goals, and may be in a position to take actions contrary to our policies or objectives. Such investments may also lead to impasses, for example, as to whether to sell a property, because neither we nor the other parties to these investments may have full control over the entity. In addition, we may in certain circumstances be liable for the actions of the other parties to these investments. Each of these factors could have an adverse effect on our financial condition, results of operations, cash flows and ability to make distributions to our shareholders. In some instances, joint venture partners may have competing interests that could create conflicts of interest. These conflicts may include compliance with the REIT requirements, and our REIT status could be jeopardized if any of our joint ventures do not operate in compliance with the REIT requirements. To the extent our joint venture partners do not meet their obligations to us or they take action inconsistent with our interests in the joint venture, we may be adversely affected.

Our properties face significant competition which could adversely affect our ability to lease our properties and result in lower cash flows.

We face significant competition from developers, owners and operators of office, retail, multifamily and other commercial real estate. Substantially all of our properties face competition from similar properties in the same market. Such competition may affect our ability to attract and retain tenants and may reduce the rents we are able to charge. These competing properties may have vacancy rates higher than our properties, which may result in their owners being willing to make space available at lower rents than the space in our properties. As a result, it may be more difficult for us to lease our space, which would result in lower cash flows.

We face risks associated with short-term liquid investments which could adversely affect our results of operations or financial condition.

We periodically have significant cash balances that we invest in a variety of short-term investments that are intended to preserve principal value and maintain a high degree of liquidity while providing current income. From time to time, these investments may include (either directly or indirectly):

• direct obligations issued by the U.S. Treasury;

• obligations issued or guaranteed by the U.S. government or its agencies;

• taxable municipal securities;

• obligations (including certificates of deposit) of banks and thrifts;

• commercial paper and other instruments consisting of short-term U.S. dollar denominated obligations issued by corporations and banks;

• repurchase agreements collateralized by corporate and asset-backed obligations;

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• registered and unregistered money market funds; and

• other highly-rated short-term securities.

Investments in these securities and funds are not insured against loss of principal. Under certain circumstances, we may be required to redeem all or part of our investment, and our right to redeem some or all of our investment may be delayed or suspended. In addition, there is no guarantee that our investments in these securities or funds will be redeemable at par value. A decline in the value of our investment or a delay or suspension of our right to redeem may have a material adverse effect on our results of operations or financial condition.

Compliance or failure to comply with the Americans with Disabilities Act and other laws and regulations could result in substantial costs and adversely affect our results of operations.

The Americans with Disabilities Act generally requires that public buildings, including commercial and multifamily properties, be made accessible to disabled persons. Noncompliance could result in imposition of fines by the federal government or the award of damages to private litigants. If, pursuant to the Americans with Disabilities Act, we are required to make substantial alterations and capital expenditures in one or more of our properties, including the removal of access barriers, it could adversely affect our results of operations.

We may also incur significant costs complying with other regulations. Our properties are subject to various federal, state and local regulatory requirements, such as state and local fair housing, rent control and fire and life safety requirements. If we fail to comply with these requirements, we may incur fines or private damage awards. We believe that our properties are currently in material compliance with regulatory requirements. However, we do not know whether existing requirements will change or whether compliance with future requirements will require significant unanticipated expenditures that will adversely affect our results of operations.

Some potential losses are not covered by insurance, which could adversely affect our financial condition or cash flow.

We carry insurance coverage on our properties of types and in amounts that we believe are in line with coverage customarily obtained by owners of similar properties. We believe all of our properties are adequately insured. The property insurance that we maintain for our properties has historically been on an “all risk” basis, which is in full force and effect until renewal in August 2017. There are other types of losses, such as from wars or catastrophic events, for which we cannot obtain insurance at all or at a reasonable cost.

We have an insurance policy that has no terrorism exclusion, except for non-certified nuclear, chemical and biological acts of terrorism. Our financial condition and results of operations are subject to the risks associated with acts of terrorism and the potential for uninsured losses as the result of any such acts. Effective November 26, 2002, under this existing coverage, any losses caused by certified acts of terrorism would be partially reimbursed by the United States under a formula established by federal law. Under this formula, the United States pays 85% of covered terrorism losses exceeding the statutorily established deductible paid by the insurance provider, and insurers pay 10% until aggregate insured losses from all insurers reach $100 billion in a calendar year. If the aggregate amount of insured losses under this program exceeds $100 billion during the applicable period for all insured and insurers combined, then each insurance provider will not be liable for payment of any amount which exceeds the aggregate amount of $100 billion. On January 12, 2015, The Terrorism Risk Insurance Program Reauthorization Act of 2015 was signed into law, extending the program through December 31, 2020. We continue to monitor the state of the insurance market in general, and the scope and costs of coverage for acts of terrorism in particular, but we cannot anticipate what amount of coverage will be available on commercially reasonable terms in future policy years.

In the event of an uninsured loss or a loss in excess of our insurance limits, we could lose both the revenues generated from the affected property and the capital we have invested in the affected property. Depending on the specific circumstances of the affected property it is possible that we could be liable for any mortgage indebtedness or other obligations related to the property. Any such loss could adversely affect our business and financial condition and results of operations.

In most cases, we have to renew our policies on an annual basis and negotiate acceptable terms for coverage, exposing us to the volatility of the insurance markets, including the possibility of rate increases. Any material increase in insurance rates or decrease in available coverage in the future could adversely affect our results of operations and financial condition.

Property ownership also involves potential liability to third parties for such matters as personal injuries occurring on the property. Such losses may not be fully insured. In addition to uninsured losses, various government authorities may condemn all or parts of operating properties. Such condemnations could adversely affect the viability of such projects. Any such uninsured loss would adversely affect our cash flow.

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Actual or threatened terrorist attacks may adversely affect our ability to generate revenues and the value of our properties.

All of our properties are located in or near Washington D.C., a metropolitan area that has been and may in the future be the target of actual or threatened terrorism attacks. As a result, some tenants in our market may choose to relocate their businesses to other markets. This could result in an overall decrease in the demand for commercial space in this market generally, which could increase vacancies in our properties or necessitate that we lease our properties on less favorable terms, or both. In addition, future terrorist attacks in or near Washington D.C. could directly or indirectly damage our properties, both physically and financially, or cause losses that materially exceed our insurance coverage. As a result of the foregoing, our ability to generate revenues and the value of our properties could decline materially which would negatively affect our results of operations.

Potential liability for environmental matters could result in substantial costs, which would reduce the cash available for our operations and for distributions to our shareholders.

Under federal, state and local environmental laws, ordinances and regulations, we may be liable for costs and damages resulting from the presence or release of hazardous or toxic substances, wastes or petroleum products at our properties, including investigation or cleanup costs, personal or property damage, natural resource damages, or we may be required to pay for such costs and damages incurred by a government entity or third party regardless of our knowledge or responsibility, simply because of our current or past ownership or operation of the real estate. If environmental contamination issues arise, we may have to make substantial payments, which could adversely affect our cash flow and our ability to make distributions to our shareholders, because (1) as a current or former owner or operator of real property we may have to pay for property damage and for investigation and clean-up costs incurred in connection with the contamination; (2) the law typically imposes clean-up responsibility and liability regardless of whether the owner or operator knew of or caused the contamination; (3) even if more than one person may be responsible for the contamination, each person who shares legal liability under such environmental laws may be held responsible for all of the clean-up costs; and (4) governmental entities and third parties may sue the owner or operator of a contaminated site for damages and costs. We also may be liable for the costs of removal or remediation of hazardous substances or waste at disposal or treatment facilities if we arranged for disposal or treatment of hazardous substances at such facilities, whether or not we own such facility.

In addition, the U.S. Environmental Protection Agency, the U.S. Occupational Safety and Health Administration and other state and local governmental authorities are increasingly imposing indoor air quality standards, especially with respect to asbestos, mold, and lead-based paint. The clean up or abatement of any of these environmental conditions, including for asbestos and mold, can be costly. For example, laws applicable to buildings containing certain asbestos-containing materials (“ACM”) impose multiple requirements, including:

• properly managing and maintaining the ACM;

• notifying and training those who may come into contact with the ACM; and

• undertaking special precautions, including removal or other abatement, if the ACM would be disturbed during renovation or demolition of a building.

Such laws may impose fines and penalties on building owners or operators who fail to comply with these requirements and may allow third parties to seek recovery from owners or operators for personal injury or property damage associated with exposure to asbestos fibers.

Inquiries about indoor air quality may necessitate special investigation and, depending on the results, remediation beyond our regular indoor air quality testing and maintenance programs. Indoor air quality issues can stem from inadequate ventilation, chemical contaminants from indoor or outdoor sources, and biological contaminants such as molds, pollen, viruses and bacteria. Indoor exposure to chemical or biological contaminants above certain levels can be alleged to be connected to allergic reactions or other health effects and symptoms in susceptible individuals. If these conditions were to occur at one of our properties, we may be subject to third-party claims for personal injury, or may need to undertake a targeted remediation program, including without limitation, steps to increase indoor ventilation rates and eliminate sources of contaminants. Such remediation programs could be costly, necessitate the temporary relocation of some or all of the property’s tenants or require rehabilitation of the affected property. 

The costs associated with these issues could be substantial and, in extreme cases, could exceed the value of the contaminated property. The presence of hazardous or toxic substances or petroleum products or the failure to properly remediate contamination may adversely affect our ability to borrow against, sell or rent an affected property. In addition, applicable environmental laws may create liens on contaminated sites in favor of the government for damages and costs it incurs in connection with a contamination. Moreover, if contamination is discovered on our properties, environmental laws may impose restrictions on the manner in which property may be used or businesses may be operated, and these restrictions may result in substantial expenditures or liabilities.

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It is our policy to retain independent environmental consultants to conduct Phase I environmental site assessments and asbestos surveys with respect to our acquisition of properties. These assessments generally include a visual inspection of the properties and the surrounding areas, an examination of current and historical uses of the properties and the surrounding areas and a review of relevant state, federal and historical documents. However, they do not always involve invasive techniques such as soil and ground water sampling. When appropriate, on a property-by-property basis, our general practice is to have these consultants conduct additional testing. However, even though these additional assessments may be conducted, there is still the risk that:

• the environmental assessments and updates did not identify all potential environmental liabilities;

• a prior owner created a material environmental condition that is not known to us or the independent consultants preparing the assessments;

• new environmental liabilities have developed since the environmental assessments were conducted; and

• future uses or conditions or changes in applicable environmental laws and regulations could result in environmental liability to us.

In addition, our properties are subject to various federal, state, and local environmental, health and safety regulatory requirements that address a wide variety of issues. Noncompliance with these environmental and health and safety laws and regulations could subject us or our tenants to liability, including significant fines or penalties. These liabilities could affect a tenant’s ability to make rental payments to us. Moreover, changes in laws could increase the potential costs of compliance with such laws and regulations or increase liability for noncompliance. This may result in significant unanticipated expenditures or may otherwise adversely affect our operations, or those of our tenants, which could in turn have an adverse effect on us.

We cannot assure you that costs or liabilities incurred as a result of environmental issues will not affect our ability to make distributions to our shareholders or that such costs, liabilities or other remedial measures will not have an adverse effect on our financial condition and results of operations.

We face risks associated with security breaches through cyber-attacks, cyber intrusions, or otherwise, which could materially harm our financial condition, cash flows and the market price of our common shares.

We face risks associated with security breaches or disruptions, whether through cyber-attacks or cyber intrusions over the Internet, malware, computer viruses, attachments to emails, or persons inside our organization. The risk of a security breach or disruption, particularly through cyber-attacks or cyber intrusion, including by computer hackers, foreign governments, and cyber terrorists, has generally increased as the number, intensity and sophistication of attempted attacks and intrusions from around the world have increased. In the normal course of business we and our service providers (including service providers engaged in providing property management, leasing, accounting and/or payroll services) collect and retain certain personal information provided by our tenants, employees and vendors. We also rely extensively on computer systems to process transactions and manage our business. While we and our service providers employ a variety of data security measures to protect confidential information on our systems and periodically review and improve our data security measures, we cannot assure that we or our service providers will be able to prevent unauthorized access to this personal information. There can be no assurance that our efforts to maintain the security and integrity of the information we and our service providers collect and our and their computer systems will be effective or that attempted security breaches or disruptions would not be successful or damaging. Even the most well protected information, networks, systems and facilities remain potentially vulnerable because the techniques used in such attempted security breaches evolve and generally are not recognized until launched against a target, and in some cases are designed not be detected and, in fact, may not be detected. Accordingly, we and our service providers may be unable to anticipate these techniques or to implement adequate security barriers or other preventative measures, and thus it is impossible for us and our service providers to entirely mitigate this risk. A security breach or other significant disruption involving computer networks and related systems could adversely impact our financial condition, cash flows and the market price of our common shares.

We are subject to risks from natural disasters and severe weather which could increase our operating costs and reduce our cash flow.

Natural disasters and severe weather such as earthquakes, hurricanes, floods or blizzards may result in significant damage to our properties. The extent of our casualty losses and loss in operating income in connection with such events is a function of the severity of the event and the total amount of exposure in the affected area. Because our properties are concentrated in one region, a single catastrophe or destructive weather event affecting that region may have a significant negative effect on our financial condition and results of operations. As a result, our operating and financial results may vary significantly from one period to the next. We are also exposed to risks associated with inclement winter weather, including increased need for maintenance and repair of our buildings. In addition, climate change, to the extent it causes changes in weather patterns, could have effects on our business by increasing the cost of property insurance, energy and/or snow removal at our properties. As a result, the consequences of natural disasters, severe weather and climate change could increase our costs and reduce our cash flow.

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We may experience a decline in the fair value of our assets, which may have a material impact on our financial condition, liquidity and results of operations and adversely impact the market value of our securities.

A decline in the fair market value of our assets may require us to recognize an other-than-temporary impairment against such assets under GAAP if we were to determine that we do not have the ability and intent to hold any assets in unrealized loss positions to maturity or for a period of time sufficient to allow for recovery to the amortized cost of such assets. In such event, we would recognize unrealized losses through earnings and write down the amortized cost of such assets to a new cost basis, based on the fair value of such assets on the date they are considered to be other-than-temporarily impaired. Such impairment charges reflect non-cash losses at the time of recognition. Subsequent disposition or sale of such assets could further affect our future losses or gains, as they are based on the difference between the sale price received and adjusted amortized cost of such assets at the time of sale, which may adversely affect our financial condition, liquidity and results of operations. In addition, a significant economic downturn over a period of time could result in an event or change in circumstances that results in an impairment in the value of our properties or our investments in joint ventures. An impairment loss is recognized if the carrying amount of the asset is not recoverable over its expected holding period and exceeds its fair value. There can be no assurance that we will not take charges in the future related to the impairment of our assets or investments. Any future impairment could have a material adverse effect on our financial condition, liquidity or results of operations.

Rent control or rent stabilization legislation and other regulatory restrictions may limit our ability to increase rents and pass through new or increased operating costs to our tenants.

Certain states and municipalities, including Washington, DC, have adopted laws and regulations imposing restrictions on the timing or amount of rent increases or have imposed regulations relating to low- and moderate-income housing. Such laws and regulations limit our ability to charge market rents, increase rents, evict tenants or recover increases in our operating expenses and could make it more difficult for us to dispose of properties in certain circumstances. Similarly, compliance procedures associated with rent control statutes and low- and moderate-income housing regulations could have a negative impact on our operating costs, and any failure to comply with low- and moderate-income housing regulations could result in the loss of certain tax benefits and the forfeiture of rent payments. In addition, such low- and moderate-income housing regulations often require us to rent a certain number of units at below-market rents, which has a negative impact on our ability to increase cash flows from our properties subject to such regulations. Furthermore, such regulations may negatively impact our ability to attract higher-paying tenants to such properties.

We are dependent on key personnel and the loss of such personnel could adversely affect our results of operations and financial condition.

The execution of our investment strategy and management of our operations, depend to a significant degree on our senior management team. If we are unable to attract and retain skilled executives, our results of operations and financial condition could be adversely affected.

Risks Related to Financing

We face risks associated with the use of debt, including refinancing risk.

We rely on borrowings under our credit facility and offerings of debt securities to finance acquisitions and development activities and for general corporate purposes. In the recent past, the commercial real estate debt markets have experienced significant volatility due to a number of factors, including the tightening of underwriting standards by lenders and credit rating agencies and the reported significant inventory of unsold mortgage-backed securities in the market. The volatility resulted in investors decreasing the availability of debt financing as well as increasing the cost of debt financing. Circumstances could again arise in which we may not be able to obtain debt financing in the future on favorable terms, or at all. If we were unable to borrow under our credit facility or to refinance existing debt financing, our financial condition and results of operations would likely be adversely affected.

We are subject to the risks normally associated with debt, including the risk that our cash flow may be insufficient to meet required payments of principal and interest. We anticipate that only a small portion of the principal of our debt will be repaid prior to maturity. Therefore, we are likely to need to refinance a significant portion of our outstanding debt as it matures. There is a risk that we may not be able to refinance existing debt or that the terms of any refinancing will not be as favorable as the terms of the existing debt. If principal payments due at maturity cannot be refinanced, extended or repaid with proceeds from other sources, such as new equity capital, our cash flow may not be sufficient to repay all maturing debt in years when significant “balloon” payments come due. In addition, we may rely on debt to fund a portion of our new investments such as our acquisition and development activity. There is a risk that we may be unable to finance these activities on favorable terms or at all. These conditions,

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which increase the cost and reduce the availability of debt, may continue or worsen in the future. If any of these risks were to happen, it would adversely affect our financial condition and results of operations.

Our degree of leverage could limit our ability to obtain additional financing, affect the market price of our common shares or debt securities or otherwise adversely affect our financial condition.

On February 16, 2017, our total consolidated debt was approximately $1.1 billion. Consolidated debt to consolidated market capitalization ratio, which measures total consolidated debt as a percentage of the aggregate of total consolidated debt plus the market value of outstanding equity securities, is often used by analysts to assess leverage for equity REITs such as us. Our market value is calculated using the price per share of our common shares. Using the closing share price of $32.65 per share of our common shares on February 16, 2017, multiplied by the number of our common shares, our consolidated debt to total consolidated market capitalization ratio was approximately 31% as of February 16, 2017.

Our degree of leverage could affect our ability to obtain additional financing for working capital, capital expenditures, acquisitions, development or other general corporate purposes. Our senior unsecured debt is currently rated investment grade by two major rating agencies. However, there can be no assurance that we will be able to maintain this rating, and in the event our senior debt is downgraded from its current rating, we would likely incur higher borrowing costs and/or difficulty in obtaining additional financing. Our degree of leverage could also make us more vulnerable to a downturn in business or the economy generally. There is a risk that changes in our debt to market capitalization ratio, which is in part a function of our share price, or our ratio of indebtedness to other measures of asset value used by financial analysts, may have an adverse effect on the market price of our equity or debt securities.

Payments of principal and interest on borrowings may leave us with insufficient cash resources to operate our properties, fully implement our capital expenditure, acquisition and redevelopment activities, or meet the REIT distribution requirements imposed by the Internal Revenue Code of 1986, as amended (the "Code"). Our level of debt and the limitations imposed on us by our debt agreements could have significant adverse consequences, including the following:

• require us to dedicate a substantial portion of cash flow from operations to the payment of principal, and interest on, indebtedness, thereby reducing the funds available for other purposes;

• make it more difficult for us to borrow additional funds as needed or on favorable terms, which could, among other things, adversely affect our ability to meet operational needs;

• restrict us from making strategic acquisitions, developing properties or exploiting business opportunities;

• force us to dispose of one or more of our properties, possibly on unfavorable terms (including the possible application of the 100% tax on income from prohibited transactions or in violation of certain covenants to which we may be subject);

• subject us to increased sensitivity to interest rate increases;

• make us more vulnerable to economic downturns, adverse industry conditions or catastrophic external events;

• limit our ability to withstand competitive pressures;

• limit our ability to refinance our indebtedness at maturity or the refinancing terms may be less favorable than the terms of our original indebtedness;

• reduce our flexibility in planning for or responding to changing business, industry and economic conditions; and/or

• place us at a competitive disadvantage to competitors that have relatively less debt than we have.

If any one of these events were to occur, our financial condition, results of operations, cash flow and market price of our common shares could be adversely affected.

Rising interest rates would increase our interest costs which could adversely affect our cash flow and ability to pay distributions.

We incur indebtedness that bears interest at variable rates. Accordingly, if interest rates increase, so will our interest costs, which could adversely affect our cash flow and our ability to service debt. As a protection against rising interest rates, we may enter into agreements such as interest rate swaps, caps, floors and other interest rate exchange contracts. These agreements, however, increase our risks that other parties to the agreements may not perform or that the agreements may be unenforceable. In addition, an increase in interest rates could decrease the amounts third-parties are willing to pay for our assets, thereby limiting our ability to change our portfolio promptly in response to changes in economic or other conditions.

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Mortgage debt obligations expose us to the possibility of foreclosure, which could result in the loss of our investment in a property or group of properties subject to mortgage debt.

Incurring mortgage and other secured debt obligations increases our risk of property losses because defaults on indebtedness secured by properties may result in foreclosure actions initiated by lenders and ultimately our loss of the property securing any loans for which we are in default. Any foreclosure on a mortgaged property or group of properties could adversely affect the overall value of our portfolio of properties (or portions thereof). For tax purposes, a foreclosure of any of our properties that is subject to a nonrecourse mortgage loan generally would be treated as a sale of the property for a purchase price equal to the outstanding balance of the debt secured by the mortgage. If the outstanding balance of the debt secured by the mortgage exceeds our tax basis in the property, we would recognize taxable income on foreclosure, but would not receive any cash proceeds, which could hinder our ability to satisfy the distribution requirements applicable to REITs under the Code.

Disruptions in the financial markets could affect our ability to obtain financing or have other adverse effects on us or the market price of our common shares.

In recent years, the United States and global equity and credit markets have experienced significant price volatility and liquidity disruptions which caused the market prices of shares to fluctuate substantially and the spreads on prospective debt financings to widen considerably. These circumstances significantly and negatively impacted liquidity in the financial markets, making terms for certain financings less attractive or unavailable. Any disruption in the equity and credit markets could negatively impact our ability to access additional financing at reasonable terms or at all. If such disruption were to occur, in the event of a debt financing, our cost of borrowing in the future would likely be significantly higher than historical levels. Additionally, in the case of a common equity financing, the disruptions in the financial markets could have a material adverse effect on the market value of our common shares, potentially requiring us to issue more shares than we would otherwise have issued with a higher market value for our common shares. Disruption in the financial markets also could negatively affect our ability to make acquisitions, undertake new development projects and refinance our debt. In addition, it could also make it more difficult for us to sell properties and could adversely affect the price we receive for properties that we do sell, as prospective buyers experience increased costs of financing and difficulties in obtaining financing. If economic conditions deteriorate, the ability of lenders to fulfill their obligations under working capital or other credit facilities that we may have in the future may be adversely impacted.

Disruptions in the financial markets also could adversely affect many of our tenants and their businesses, including their ability to pay rents when due and renew their leases at rates at least as favorable as their current rates. As well, our ability to attract prospective new tenants in the future could be adversely affected by disruption in the financial markets. Each of these disruptions could have adverse effects on us or the market price of our common shares.

Covenants in our debt agreements could adversely affect our financial condition.

Our credit facility contains customary restrictions, requirements and other limitations on our ability to incur indebtedness. We must maintain certain ratios, including a maximum of total indebtedness to total asset value, a maximum of secured indebtedness to total asset value, a minimum of quarterly adjusted EBITDA to fixed charges, a minimum net operating income from unencumbered properties to unsecured interest expense and a maximum of unsecured indebtedness to unencumbered asset value. Our ability to borrow under our credit facility is subject to compliance with our financial and other covenants.

Failure to comply with any of the covenants under our unsecured credit facility or other debt instruments could result in a default under one or more of our debt instruments. In particular, we could suffer a default under one of our secured debt instruments that could exceed a cross-default threshold under our unsecured credit facility, causing an event of default under the unsecured credit facility. Under those circumstances, other sources of capital may not be available to us or be available only on unattractive terms. In addition, if we breach covenants in our debt agreements, the lenders can declare a default and, if the debt is secured, take possession of the property securing the defaulted loan.

Alternatively, even if a secured debt instrument is below the cross-default threshold for non-recourse secured debt under our unsecured credit facility, a default under such secured debt instrument may still cause a cross default under our unsecured credit facility because such secured debt instrument may not qualify as “non-recourse” under the definition in our unsecured credit facility. Another possible cross default could occur between our unsecured credit facility and our senior unsecured notes. Any of the foregoing default or cross-default events could cause our lenders to accelerate the timing of payments and/or prohibit future borrowings, either of which would have a material adverse effect on our business, operations, financial condition and liquidity.

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Failure to effectively hedge against interest rate changes may adversely affect our financial condition, results of operations, cash flow, per share market price of our common shares and ability to make distributions to our shareholders.

We enter into hedging transactions to protect ourselves from the effects of interest rate fluctuations on floating rate debt. Our hedging transactions include entering into interest rate cap agreements or interest rate swap agreements. These agreements involve risks, such as the risk that such arrangements would not be effective in reducing our exposure to interest rate changes or that a court could rule that such an agreement is not legally enforceable. In addition, interest rate hedging can be expensive, particularly during periods of rising and volatile interest rates. Failure to hedge effectively against interest rate changes could materially adversely affect our financial condition, results of operations, cash flow, per share trading price of our common shares and ability to make distributions to our shareholders. In addition, while such agreements would be intended to lessen the impact of rising interest rates on us, they could also expose us to the risk that the other parties to the agreements would not perform, and that the hedging arrangements may not be effective in reducing our exposure to interest rate changes. In addition, the REIT provisions of the Code impose certain restrictions on our ability to utilize hedges, swaps and other types of derivatives to hedge our liabilities. Moreover, there can be no assurance that our hedging arrangements will qualify as highly effective cash flow hedges under Financial Accounting Standards Board ("FASB"), Accounting Standards Codification ("ASC") Topic 815, Derivatives and Hedging, or that our hedging activities will have the desired beneficial impact on our results of operations. Should we desire to terminate a hedging agreement, there could be significant costs and cash requirements involved to fulfill our obligation under the hedging agreement.

Risks Related to Our Organizational Structure

Our charter and Maryland law contain provisions that may delay, defer or prevent a change in control of our company, even if such a change in control may be in the best interest of our shareholders, and as a result may depress the market price of our common shares.

Provisions of the Maryland General Corporation Law ("MGCL") may limit a change in control which could prevent holders of our common shares from profiting as a result of such change in control. These provisions include:

• a provision where a corporation is not permitted to engage in any business combination with any “interested stockholder,” defined as any holder or affiliate of any holder of 10% or more of the corporation’s stock, for a period of five years after that holder becomes an “interested stockholder,” and

• a provision where the voting rights of “control shares” acquired in a “control share acquisition,” as defined in the MGCL, may be restricted, such that the “control shares” have no voting rights, except to the extent approved by a vote of holders of two-thirds of the common shares entitled to vote on the matter.

Additionally, we are subject to the “business combination” and “unsolicited takeover” provisions of the MGCL. These provisions may delay, defer, or prevent a transaction or a change in control that may involve a premium price for holders of our shares or otherwise be in their best interests. Our bylaws currently provide that the foregoing provision regarding "control share acquisitions" will not apply to Washington REIT. However, our board of trustees could, in the future, modify our bylaws such that the foregoing provision regarding "control share acquisitions" would be applicable to Washington REIT.

The stock ownership limits imposed by the Code for REITs and imposed by our charter may restrict our business combination opportunities that might involve a premium price for our common shares or otherwise be in the best interest of our shareholders. 

In order for us to maintain our qualification as a REIT under the Code, not more than 50% in value of our outstanding equity shares may be owned, directly or indirectly, by five or fewer individuals (defined in the Code to include certain entities) at any time during the last half of each taxable year following our first year. Our charter authorizes our board of trustees to take the actions that are necessary or appropriate to preserve our qualification as a REIT. Our charter provides that no person (other than an excepted holder, as defined in our charter) may actually or constructively own more than 9.8% of the aggregate of our outstanding common shares by value or by number of shares, whichever is more restrictive, or 9.8% of the aggregate of the outstanding shares of all classes and series ("equity shares") by value.

Our board of trustees may, in its sole discretion, grant exemptions to the share ownership limits, subject to such conditions and the receipt by our board of trustees of certain representations and undertakings. In addition, our board of trustees has the authority under our charter to reduce these share ownership limits.

In addition to the share ownership limits discussed above, our charter also prohibits any person from (a) beneficially or constructively owning, as determined by applying certain attribution rules of the Code, our equity shares that would result in us being “closely held” under Section 856(h) of the Code (regardless of whether the interest is held during the last half of a taxable year) or that would otherwise cause us to fail to qualify as a REIT, or (b) transferring equity shares if such transfer would result

19

in our equity shares being owned by fewer than 100 persons. The share ownership limits contained in our charter are based on the ownership at any time by any “person,” which term includes entities and certain groups. The share ownership limitations in our charter are common in REIT charters and are intended to provide added assurance of compliance with the tax law requirements, and to minimize administrative burdens. However, the share ownership limits on our shares also might delay, defer, prevent, or otherwise inhibit a transaction or a change in control of our company that might involve a premium price for our common shares or otherwise be in the best interest of our shareholders.

Our rights and the rights of our shareholders to take action against our trustees and officers are limited, which could limit your recourse in the event of actions that you do not believe are in your best interests.

Maryland law provides that a trustee has no liability in that capacity if he or she satisfies his or her duties to us and our shareholders. Under current Maryland law, our trustees and officers will not have any liability to us or our shareholders for money damages, except for liability resulting from:

• actual receipt of an improper benefit or profit in money, property or services; or

• a final judgment based upon a finding of active and deliberate dishonesty by the trustee or officer that was material to the cause of action adjudicated.

In addition, our charter authorizes and our bylaws require us to indemnify our trustees for actions taken by them in those capacities to the maximum extent permitted by Maryland law. Our bylaws also authorize us to indemnify our officers for actions taken by them in those capacities to the maximum extent permitted by Maryland law. As a result, we and our shareholders may have more limited rights against our trustees and officers than might otherwise exist. Accordingly, in the event that actions taken in good faith by any of our trustees or officers impede the performance of our company, your ability to recover damages from such trustees or officers will be limited with respect to trustees and may be limited with respect to officers. In addition, we will be obligated to advance the defense costs incurred by our trustees and our executive officers, and may, in the discretion of our board of trustees, advance the defense costs incurred by our officers, our employees and other agents, in connection with legal proceedings.

Risks Related to Our Common Shares

We cannot assure you we will continue to pay dividends at current rates.

Cash flows from operations are an important factor in our ability to sustain our dividend at its current rate. If our cash flows from operations were to decline significantly, we may have to borrow on our lines of credit to sustain the dividend rate or reduce our dividend. Our ability to continue to pay dividends on our common shares at their current rate or to increase our common share dividend rate will depend on a number of factors, including, among others, the following:

• our future financial condition and results of operations;

• real estate market conditions in the Washington metro region;

• the performance of lease terms by tenants;

• the terms of our loan covenants; and

• our ability to acquire, finance, develop or redevelop and lease additional properties at attractive rates.

Our board of trustees considers, among other factors, trends in our levels of funds from operations, together with associated recurring capital improvements, tenant improvements, leasing commissions and incentives, and adjustments to straight-line rents to reflect cash rents received. If some or all of these factors were to trend downward for a sustained period of time, our board of trustees could determine to reduce our dividend rate. If we do not maintain or increase the dividend rate on our common shares in the future, it could have an adverse effect on the market price of our common shares.

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

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

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The market value of our securities can be adversely affected by many factors.

As with any public company, a number of factors may adversely influence the public market price of our common shares. These factors include:

• level of institutional interest in us;

• perceived attractiveness of investment in us, in comparison to other REITs;

• perceived attractiveness of the Washington metro region, particularly if investors have a negative sentiment about the impact of election results on the region's economy;

• attractiveness of securities of REITs in comparison to other asset classes taking into account, among other things, that a substantial portion of REITs’ dividends are taxed as ordinary income;

• our financial condition and performance;

• the market’s perception of our growth potential and potential future cash dividends;

• investor confidence in the stock and bond markets generally;

• national economic conditions and general stock and bond market conditions;

• government action or regulation, including changes in tax law;

• increases in market interest rates, which may lead investors to expect a higher annual yield from our distributions in relation to the price of our shares;

• changes in federal tax laws;

• changes in our credit ratings; and

• any negative change in the level of our dividend or the partial payment thereof in common shares.

Risks Related to our Status as a REIT

Loss of our tax status as a REIT would have significant adverse consequences to us and the value of our common shares.

We believe that we qualify as a REIT and intend to continue to operate in a manner that will allow us to continue to qualify as a REIT. However, we cannot assure you that we are qualified as such, or that we will remain qualified as such in the future. This is because qualification as a REIT involves the application of highly technical and complex provisions of the Code which include:

• maintaining ownership of specified minimum levels of real estate related assets;

• generating specified minimum levels of real estate related income;

• maintaining certain diversity of ownership with respect to our shares; and

• distributing at least 90% of our "REIT taxable income" (determined before the deduction for dividends paid and excluding net capital gains) on an annual basis.

The distribution requirement noted above could adversely affect our ability to use earnings for improvements or acquisitions because funds distributed to shareholders will not be available for capital improvements to existing properties or for acquiring additional properties.

Only limited judicial and administrative interpretations of the REIT rules exist. In addition, qualification as a REIT involves the determination of various factual matters and circumstances not entirely within our control. Future legislation, new regulations, administrative interpretations or court decisions may significantly change the tax laws or the application of the tax laws with respect to qualification as a REIT for U.S. federal income tax purposes or the U.S. federal income tax consequences of such qualification.

If we fail to qualify as a REIT, we could face serious tax consequences that could substantially reduce our funds available for payment of dividends for each of the years involved because:

• we would be subject to U.S. federal income tax at regular corporate rates, without any deduction for dividends paid to shareholders in computing our taxable income;

• we could be subject to the federal alternative minimum tax and possibly increased state and local taxes; and

• unless we are entitled to relief under statutory provisions, we could not elect to be subject to tax as a REIT for four taxable years following the year during which we are disqualified.

This treatment would reduce net earnings available for investment or distribution to shareholders because of the additional tax liability for the year (or years) involved. To the extent that distributions to shareholders had been made based on the assumption of our qualification as a REIT, we might be required to borrow funds or to liquidate certain of our investments to pay the applicable tax. As a result of these factors, our failure to qualify as a REIT could have a material adverse impact on our results of operations,

21

financial condition and liquidity. If we fail to qualify as a REIT but are eligible for certain relief provisions, then we may retain our status as a REIT but may be required to pay a penalty tax, which could be substantial.

Complying with the REIT requirements may cause us to forego and/or liquidate otherwise attractive investments.

To qualify as a REIT, we must ensure that we meet the REIT gross income tests annually. In addition, we must ensure that, at the end of each calendar quarter, at least 75% of the value of our total assets consists of cash, cash items, government securities and qualifying real estate assets, including certain mortgage loans (the "75% asset test"). The remainder of our investment in securities (other than government securities, securities treated as real estate assets and securities issued by a TRS) generally cannot include more than 10% of the outstanding voting securities of any one issuer or more than 10% of the total value of the outstanding securities of any one issuer. In addition, in general, no more than 5% of the value of our assets (other than government securities, securities treated as real estate assets and securities issued by a TRS) can consist of the securities of any one issuer, and no more than 25% (20% for tax years beginning after December 31, 2017) of the value of our total securities can be represented by securities of one or more TRSs. Effective for taxable years beginning after December 31, 2015, debt instruments issued by publicly offered REITs, to the extent not secured by real property or interests in real property, are treated as "real estate assets" for purposes of the 75% test (and, thus, not subject to the 10% and 5% asset tests), but the total value of such debt instruments cannot exceed 25% of the value of our total assets. If we fail to comply with these asset requirements at the end of any calendar quarter, we must correct the failure within 30 days after the end of the calendar quarter or qualify for certain statutory relief provisions to avoid losing our REIT qualification and suffering adverse tax consequences.

To meet these tests, we may be required to take or forgo taking actions that we would otherwise consider advantageous. For instance, in order to satisfy the gross income or asset tests applicable to REITs under the Code, we may be required to forego investments that we otherwise would make. Furthermore, we may be required to liquidate from our portfolio (or to contribute to a TRS) otherwise attractive investments. In addition, we may be required to make distributions to shareholders at disadvantageous times or when we do not have funds readily available for distribution. These actions could have the effect of reducing our income and amounts available for distribution to our shareholders. Thus, compliance with the REIT requirements may hinder our ability to make, or, in certain cases, maintain ownership of, certain attractive investments.

The requirements necessary to maintain our REIT status limit our ability to earn fee income at the REIT level, which causes us to conduct certain fee-generating activities through a TRS.

The REIT provisions of the Code limit our ability to earn fee income from joint ventures and third parties. Our aggregate gross income from fees and certain other non-qualifying sources cannot exceed 5% of our annual gross income. As a result, our ability to increase the amount of fee income we earn at the REIT level is limited and, therefore, we conduct certain fee-generating activities through a TRS. Any fee income we earn through a TRS is subject to U.S. federal, state, and local income tax at regular corporate rates, which reduces our cash available for distribution to shareholders.

Our ability to own stock and securities of TRSs is limited and our transactions with our TRS will cause us to be subject to a 100% penalty tax on certain income or deductions if those transactions are not conducted on arm's length terms.

A REIT may own up to 100% of the stock of one or more TRSs. A TRS may hold assets and earn income that would not be qualifying assets or income if held or earned directly by a REIT. Both the subsidiary and the REIT must jointly elect to treat the subsidiary as a TRS. A corporation of which a TRS directly or indirectly owns more than 35% of the voting power or value of the stock will automatically be treated as a TRS. Overall, no more than 25% (20% for tax years beginning after December 31, 2017) of the value of a REIT's assets may consist of stock or securities of one or more TRSs. In addition, the rules applicable to TRSs limit the deductibility of interest paid or accrued by a TRS to its parent REIT to assure that the TRS is subject to an appropriate level of corporate taxation. The rules also impose a 100% excise tax on the parent REIT with respect to certain transactions involving a TRS that are not conducted on an arm's length basis.

Our TRSs will pay federal, state and local income tax on its taxable income. The after-tax net income of our TRSs will be available for distribution to us but generally is not required to be distributed. We believe that the aggregate value of the stock and securities of our TRSs is less than 25% (20% for tax years beginning after December 31, 2017) of the value of our total assets (including the stock and securities of our TRS). Furthermore, we monitor the value of our respective investments in our TRSs for the purpose of ensuring compliance with the ownership limitations applicable to TRSs. We scrutinize all of our transactions involving our TRSs to ensure that they are entered into on arm's length terms to avoid incurring the 100% excise tax described above. There can be no assurance, however, that we will be able to comply with the 25% (20% for tax years beginning after December 31, 2017) limitation discussed above or avoid application of the 100% excise tax discussed above.

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Complying with REIT requirements may limit our ability to hedge effectively and may cause us to incur tax liabilities.

The REIT provisions of the Code may limit our ability to hedge our assets and operations. Under these provisions, income that we generate from transactions we enter into to manage risk of interest rate changes with respect to borrowings made or to be made to acquire or carry real estate assets (each such hedge, a "Borrowings Hedge"), or manage the risk of certain currency fluctuations (each such hedge, a "Currency Hedge"), and such instrument is properly identified under applicable Treasury Regulations, does not constitute "gross income" for purposes of the 75% or 95% gross income tests. Effective for taxable years beginning after December 31, 2015, this exclusion from the 95% and 75% gross income tests also applies if we previously entered into a Borrowings Hedge or a Currency Hedge, a portion of the hedged indebtedness or property is disposed of, and in connection with such extinguishment or disposition we enter into a new "clearly identified" hedging transaction to offset the prior hedging position. As a result of these rules, we may have to limit our use of hedging techniques that might otherwise be advantageous or implement those hedges through a TRS. This could increase the cost of our hedging activities because our TRS would be subject to tax on gains or expose us to greater risks associated with changes in interest rates than we would otherwise want to bear. In addition, losses in our TRS will generally not provide any current tax benefit, except to the extent that they may be carried back to prior years or forward to future years and offset against taxable income in the TRS.

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

The maximum tax rate applicable to income from "qualified dividends" payable by corporations to U.S. shareholders that are individuals, trusts and estates is 20% (excluding the 3.8% net investment income tax). Dividends payable by REITs, however, generally are not eligible for the reduced rates and will continue to be subject to tax at rates applicable to ordinary income. Although this does not adversely affect the taxation of REITs or dividends payable by REITs, the more favorable rates applicable to regular corporate qualified dividends could cause investors who are individuals, trusts and estates to perceive investments in REITs to be relatively less attractive than investments in the shares of non-REIT corporations that pay dividends, which could adversely affect the value of the stock of REITs, including our common shares.

Gains from sales of properties are potentially subject to the prohibited transactions tax or a corporate level income tax and could require us to make additional distributions to our shareholders which would reduce our capital available for investment in other properties or require us to obtain additional funds to pay such taxes or make such distributions.

A REIT's net income from prohibited transactions is subject to a 100% penalty tax. In general, prohibited transactions are sales or other dispositions of property, other than foreclosure property, held primarily for sale to customers in the ordinary course of business. Although we do not intend to hold any properties that would be characterized as held for sale to customers in the ordinary course of our business, unless a sale or disposition qualifies under certain statutory safe harbors, such characterization is a factual determination and no guarantee can be given that the IRS would agree with our characterization of our properties or that we will be able to make use of the otherwise available safe harbors. In addition, the sale of properties may generate gains for tax purposes which, if not adequately deferred through “like kind exchanges” under Section 1031 of the Code ("Section 1031 Exchanges"), could require us to pay more taxes or make additional distributions to our shareholders, thus reducing our capital available for investment in other properties, or if the proceeds of such sales are already invested in other properties, require us to obtain additional funds to pay such taxes or make such distributions.From time to time, we dispose of properties in transactions intended to qualify as Section 1031 Exchanges. Intermediary agents of Section 1031 Exchanges typically handle large sums of money in trust. It is possible that the qualification of a transaction as a Section 1031 Exchange could be successfully challenged and determined to be currently taxable. In such case, our taxable income and earnings and profits would increase. This could increase the dividend income to our shareholders by reducing any return of capital they received. In some circumstances, we may be required to pay additional dividends or, in lieu of that, corporate income tax, possibly including interest and penalties. As a result, we may be required to borrow funds in order to pay additional dividends or taxes, and the payment of such taxes could cause us to have less cash available to distribute to our shareholders. In addition, if a Section 1031 Exchange were later to be determined to be taxable, we may be required to amend our tax returns for the applicable year in question, including any information reports we sent our shareholders. Moreover, it is possible that legislation could be enacted that could modify or repeal the laws with respect to Section 1031 Exchanges, which could make it more difficult or not possible for us to dispose of properties on a tax deferred basis.

The REIT distribution requirements could require us to borrow funds during unfavorable market conditions or subject us to tax, which would reduce the cash available for distribution to our shareholders.

In order to qualify as a REIT, we generally must distribute to our shareholders, on an annual basis, at least 90% of our "REIT taxable income," determined without regard to the deduction for dividends paid and excluding net capital gains. In addition, we will be subject to U.S. federal income tax at regular corporate rates to the extent that we distribute less than 100% of our net taxable income (including net capital gains) and will be subject to a 4% nondeductible excise tax on the amount by which our distributions in any calendar year are less than a minimum amount specified under U.S. federal income tax laws. We intend to continue to

23

distribute our net income to our shareholders in a manner intended to satisfy the REIT 90% distribution requirement and to avoid U.S. federal income tax and the 4% nondeductible excise tax.

In addition, from time to time our taxable income may exceed our net income as determined by GAAP. This may occur, for instance, because realized capital losses are deducted in determining our GAAP net income, but may not be deductible in computing our taxable income. In addition, we may incur nondeductible capital expenditures or be required to make debt or amortization payments. As a result of the foregoing, we may generate less cash flow than taxable income in a particular year and we may incur U.S. federal income tax and the 4% nondeductible excise tax on that income if we do not distribute such income to shareholders in that year. In that event, we may be required to (i) use cash reserves, (ii) incur debt at rates or times that we regard as unfavorable, (iii) sell assets in adverse market conditions, (iv) distribute amounts that would otherwise be invested in future acquisitions, capital expenditures or repayment of debt, or (v) make a taxable distribution of our shares as part of a distribution in which shareholders may elect to receive our shares or (subject to a limit measured as a percentage of the total distribution) cash in order to satisfy the REIT 90% distribution requirement and to avoid U.S. federal income tax and the 4% nondeductible excise tax in that year. These alternatives could increase our costs or reduce our equity. Thus, compliance with the REIT requirements may hinder our ability to grow, which could adversely affect our business, financial condition and results of operations.

The ability of our board of trustees to revoke our REIT qualification without shareholder approval may cause adverse consequences to our shareholders.

Our charter provides that our board of trustees may revoke or otherwise terminate our REIT election, without the approval of our shareholders, if it determines that it is no longer in our best interest to continue to qualify as a REIT. If we cease to be a REIT, we will not be allowed a deduction for dividends paid to shareholders in computing our taxable income, will be subject to U.S. federal, state and local income tax at regular corporate rates, and generally would no longer be required to distribute any of our net taxable income to our shareholders, which may have adverse consequences on our total return to our shareholders.

Even if we qualify as a REIT, we may face other tax liabilities that reduce our cash flow.

Even if we qualify for taxation as a REIT, we may be subject to certain federal, state and local taxes on our income, property or net worth, including taxes on any undistributed income, tax on income from some activities conducted as a result of a foreclosure, and state or local income, property and transfer taxes. Moreover, if we have net income from "prohibited transactions," that income will be subject to a 100% tax. In general, prohibited transactions are sales or other dispositions of property held primarily for sale to customers in the ordinary course of business. The determination as to whether a particular sale is a prohibited transaction depends on the facts and circumstances related to the sale. While we will undertake sales of assets if those assets become inconsistent with our long-term strategic or return objectives, we do not believe those sales should be considered prohibited transactions, but there can be no assurance that the IRS would not contend otherwise. The need to avoid prohibited transactions could cause us to forego or defer sales of properties that might otherwise be in our best interest to sell. In addition, we could, in certain circumstances, be required to pay an excise or penalty tax (which could be significant in amount) in order to utilize one or more relief provisions under the Code to maintain our qualification as a REIT. Any of these taxes would decrease cash available for the payment of our debt obligations and distributions to shareholders. Our TRSs generally will be subject to U.S. federal, state and local corporate income tax on their net taxable income.

There is a risk of changes in the tax law applicable to REITs.

The Internal Revenue Service, the United States Treasury Department and Congress frequently review U.S. federal income tax legislation, regulations and other guidance. We cannot predict whether, when or to what extent new federal tax laws, regulations, interpretations or rulings will be adopted. Any legislative action may prospectively or retroactively modify our tax treatment and, therefore, may adversely affect taxation of us and/or our shareholders.

ITEM 1B: UNRESOLVED STAFF COMMENTS

None.

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ITEM 2: PROPERTIES

The schedule on the following pages lists our real estate investment portfolio as of December 31, 2016, which consisted of 49 properties and land held for development.

As of December 31, 2016, the percent leased is (i) for commercial properties, the percentage of net rentable area for which fully executed leases exist and may include signed leases for space not yet occupied by the tenant, and (ii) for multifamily properties, the percentage of units leased. Cost information is included in Schedule III to our financial statements included in this Annual Report on Form 10-K.

Schedule of Properties

Properties	Location	Year Acquired	Year Constructed/Renovated	Net Rentable Square Feet (1)	Percent Leased, as of December 31, 2016 (3)
Office Buildings
1901 Pennsylvania Avenue	Washington, DC	1977	1960	102,000	79	%
515 King Street	Alexandria, VA	1992	1966	75,000	94	%
1220 19thStreet	Washington, DC	1995	1976	103,000	99	%
1600 Wilson Boulevard	Arlington, VA	1997	1973	169,000	100	%
Silverline Center	Tysons, VA	1997	1972/2015	546,000	92	%
Courthouse Square	Alexandria, VA	2000	1979	118,000	94	%
1776 G Street	Washington, DC	2003	1979	265,000	94	%
Monument II	Herndon, VA	2007	2000	208,000	84	%
2000 M Street	Washington, DC	2007	1971	231,000	100	%
2445 M Street	Washington, DC	2008	1986	290,000	100	%
925 Corporate Drive	Stafford, VA	2010	2007	134,000	72	%
1000 Corporate Drive	Stafford, VA	2010	2009	136,000	77	%
1140 Connecticut Avenue	Washington, DC	2011	1966	183,000	90	%
1227 25th Street	Washington, DC	2011	1988	136,000	95	%
Braddock Metro Center	Alexandria, VA	2011	1985	348,000	99	%
John Marshall II	Tysons, VA	2011	1996/2010	223,000	100	%
Fairgate at Ballston	Arlington, VA	2012	1988	143,000	93	%
Army Navy Building (2)	Washington, DC	2014	1912/1987	108,000	53	%
1775 Eye Street, NW	Washington, DC	2014	1964	186,000	100	%
Subtotal				3,704,000	92	%

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Properties	Location	Year Acquired	Year Constructed/Renovated	# of Units	Net Rentable Square Feet (1)	Percent Leased, as of December 31, 2016 (3)
Retail Centers
Takoma Park	Takoma Park, MD	1963	1962		51,000	100	%
Westminster	Westminster, MD	1972	1969		150,000	98	%
Concord Centre	Springfield, VA	1973	1960		76,000	80	%
Wheaton Park	Wheaton, MD	1977	1967		74,000	89	%
Bradlee Shopping Center	Alexandria, VA	1984	1955		172,000	100	%
Chevy Chase Metro Plaza	Washington, DC	1985	1975		50,000	87	%
Shoppes of Foxchase	Alexandria, VA	1994	1960/2006		134,000	98	%
Frederick County Square	Frederick, MD	1995	1973		227,000	97	%
800 S. Washington Street	Alexandria, VA	1998/2003	1955/1959		46,000	93	%
Centre at Hagerstown	Hagerstown, MD	2002	2000		331,000	95	%
Frederick Crossing	Frederick, MD	2005	1999/2003		295,000	99	%
Randolph Shopping Center	Rockville, MD	2006	1972		82,000	81	%
Montrose Shopping Center	Rockville, MD	2006	1970		145,000	79	%
Gateway Overlook	Columbia, MD	2010	2007		220,000	97	%
Olney Village Center	Olney, MD	2011	1979/2003		199,000	98	%
Spring Valley Retail Center	Washington, DC	2014	1941/1950		78,000	81	%
Subtotal					2,330,000	94	%
Multifamily Buildings
3801 Connecticut Avenue	Washington, DC	1963	1951	307	178,000	97	%
Roosevelt Towers	Falls Church, VA	1965	1964	191	170,000	96	%
Park Adams	Arlington, VA	1969	1959	200	173,000	97	%
The Ashby at McLean	McLean, VA	1996	1982	256	274,000	97	%
Walker House Apartments	Gaithersburg, MD	1996	1971/2003	212	157,000	94	%
Bethesda Hill Apartments	Bethesda, MD	1997	1986	195	225,000	97	%
Bennett Park	Arlington, VA	2007	2007	224	214,000	97	%
Clayborne	Alexandria, VA	2008	2008	74	60,000	100	%
Kenmore	Washington, DC	2008	1948	374	268,000	98	%
The Paramount	Arlington, VA	2013	1984	135	141,000	96	%
Yale West	Washington, DC	2014	2011	216	238,000	98	%
The Maxwell	Arlington, VA	2014	2014	163	139,000	96	%
The Wellington	Arlington, VA	2015	1960	711	842,000	95	%
Riverside Apartments	Alexandria, VA	2016	1971	1,222	1,266,000	94	%
Subtotal				4,480	4,345,000	96	%
TOTAL					10,379,000

⁽¹⁾ Multifamily buildings are presented in gross square feet.

⁽²⁾ The Army Navy Building is currently under redevelopment to upgrade its common areas and add significant amenities in order to make the property more competitive within its sub-market (see note 3 to the consolidated financial statements).

⁽³⁾ Leased percentage calculations are based on square feet for office buildings and retail centers and on units for multifamily buildings.

ITEM 3: LEGAL PROCEEDINGS

None.

26

ITEM 4: MINE SAFETY DISCLOSURES

N/A.

PART II

ITEM 5: MARKET FOR THE REGISTRANT’S COMMON EQUITY, RELATED STOCKHOLDER MATTERS AND ISSUER PURCHASES OF EQUITY SECURITIES

Our shares trade on the New York Stock Exchange. As of February 16, 2017, there are 4,025 shareholders of record.

The high and low sales price for our shares for 2016 and 2015, by quarter, and the amount of dividends we declared per share are as follows:

			Quarterly Share Price Range
Quarter		Dividends Per Share	High		Low
2016
	Fourth	0.30000	$	32.98	$	27.65
	Third	0.30000	$	34.61	$	29.84
	Second	0.30000	$	31.47	$	27.88
	First	0.30000	$	29.52	$	23.89
2015
	Fourth	0.30000	$	28.14	$	24.76
	Third	0.30000	$	27.28	$	23.78
	Second	0.30000	$	28.11	$	24.28
	First	0.30000	$	30.15	$	26.39

We have historically declared dividends on a quarterly basis. The maintenance of our dividend level is subject to various factors reviewed by the board of trustees in its discretion. These factors include our results of operations, the availability of cash and the REIT distribution requirements, which require at least 90% of our REIT taxable income to be distributed to shareholders on an annual basis. For further discussion, please refer to:

• "Item 7 - Management's Discussion and Analysis of Financial Condition and Results of Operations - Liquidity and Capital Resources - Dividends"; and

• "Item 1A - Risk Factors - Risks Related to Our Common Shares - We cannot assure you we will continue to pay dividends at current rates."

During the period covered by this report, we did not sell equity securities without registration under the Securities Act.

A summary of our repurchases of shares of our common stock for the three months ended December 31, 2016 was as follows:

Period	Total Number of Shares Purchased (1)	Average Price Paid per Share		Total Number of Shares Purchased as Part of Publicly Announced Plans or Programs	Maximum Number (or Approximate Dollar Value) of Shares that May Yet be Purchased
October 1 - October 31, 2016	2,541	$	31.12	N/A	N/A
November 1 - November 30, 2016	86	30.31		N/A	N/A
December 1 - December 31, 2016	18,699	32.69		N/A	N/A
Total	21,326	32.49		N/A	N/A

⁽¹⁾ Represents restricted shares surrendered by employees to Washington REIT to satisfy such employees' applicable statutory minimum tax withholding obligations in connection with the vesting of restricted shares.

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ITEM 6: SELECTED FINANCIAL DATA

The following table sets forth our selected financial data on a historical basis, which has been revised for the presentation of debt issuance costs (see note 2 to the consolidated financial statements). The following data should be read in conjunction with our financial statements and notes thereto and Management’s Discussion and Analysis of Financial Condition and Results of Operations included elsewhere in this Form 10-K.

	2016		2015		2014		2013			2012
	(in thousands, except per share data)
Real estate rental revenue	$	313,264	$	306,427	$	288,637	$	263,024		$	254,794
Income (loss) from continuing operations	$	119,288	$	89,187	$	5,070	$	(193	)	$	7,768
Discontinued operations:
Income from operations of properties sold or held for sale	$	—	$	—	$	546	$	15,395		$	10,816
Gain on sale of real estate	$	—	$	—	$	105,985	$	22,144		$	5,124
Net income	$	119,288	$	89,187	$	111,601	$	37,346		$	23,708
Net income attributable to the controlling interests	$	119,339	$	89,740	$	111,639	$	37,346		$	23,708
Income from continuing operations attributable to the controlling interests per share – diluted	$	1.65	$	1.31	$	0.08	$	—		$	0.11
Net income attributable to the controlling interests per share – diluted	$	1.65	$	1.31	$	1.67	$	0.55		$	0.35
Total assets	$	2,253,619	$	2,191,168	$	2,108,317	$	1,969,343		$	2,117,496
Lines of credit payable	$	120,000	$	105,000	$	50,000	$	—		$	—
Mortgage notes payable, net	$	148,540	$	418,052	$	417,194	$	293,307		$	317,914
Notes payable, net	$	843,084	$	743,181	$	743,149	$	841,917		$	900,532
Shareholders’ equity	$	1,050,946	$	835,649	$	819,555	$	754,959		$	792,057
Cash dividends declared	$	87,570	$	82,003	$	80,277	$	80,104		$	97,734
Cash dividends declared per share	$	1.20	$	1.20	$	1.20	$	1.20		$	1.47

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ITEM 7: MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

We provide Management’s Discussion and Analysis of Financial Condition and Results of Operations (“MD&A”) in addition to the accompanying consolidated financial statements and notes to assist readers in understanding our results of operations and financial condition. We organize the MD&A as follows:

• Overview. Discussion of our operating results, investment activity, financing activity and capital requirements to provide context for the remainder of MD&A.

• Results of Operations. Discussion of our financial results comparing 2016 to 2015 and comparing 2015 to 2014.

• Liquidity and Capital Resources. Discussion of our financial condition and analysis of changes in our capital structure and cash flows.

• Critical Accounting Policies and Estimates. Descriptions of accounting policies that reflect significant judgments and estimates used in the preparation of our consolidated financial statements.

When evaluating our financial condition and operating performance, we focus on the following financial and non-financial indicators:

• Net operating income (“NOI”), calculated as set forth below under the caption "Results of Operations - Net Operating Income." NOI is a non-GAAP supplemental measure to net income.

• Funds From Operations (“NAREIT FFO”), calculated as set forth below under the caption “Funds from Operations.” NAREIT FFO is a non-GAAP supplemental measure to net income.

• Occupancy, calculated as occupied square footage as a percentage of total square footage as of the last day of that period.

• Leased percentage, calculated as the percentage of available physical net rentable area leased for our office and retail segments and percentage of apartments leased for our multifamily segment.

• Rental rates.

• Leasing activity, including new leases, renewals and expirations.

For purposes of evaluating comparative operating performance, we categorize our properties as “same-store”, “non-same-store” or discontinued operations.Same-store properties include all properties that were owned for the entirety of the periods being evaluated and exclude properties under redevelopment or development and properties purchased or sold at any time during the periods being compared. A non-same-store property is one that was acquired, under redevelopment or development, or placed into service during the periods being evaluated. We define redevelopment properties as those for which we expect to spend significant development and construction costs on existing or acquired buildings pursuant to a formal plan which has a current impact on operating results, occupancy and the ability to lease space with the intended result of a higher economic return on the property. Properties under redevelopment or development are included within the non-same-store properties beginning in the period during which redevelopment or development activities commence. Redevelopment and development properties are included in the same-store pool upon completion of the redevelopment or development, and the earlier of achieving 90% occupancy or two years after completion.

Overview

Business Outlook

We generally expect steady to improved performance in each of our segments in 2017 due to the Washington metro region's expected job growth (see Item 1: Business - Our Regional Economy and Real Estate Markets on page 4).

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Operating Results

Net income attributable to the controlling interests, NOI and NAREIT FFO for the years ended December 31, 2016 and 2015 were as follows (in thousands):

	Year Ended December 31,
	2016		2015		Change
Net income attributable to the controlling interests	$	119,339	$	89,740	$	29,599
NOI (1)	$	198,251	$	194,193	$	4,058
NAREIT FFO (2)	$	125,990	$	108,469	$	17,521
(1) See pages 32 and 36 of the MD&A for reconciliations of NOI to net income.
(2) See page 48 of the MD&A for reconciliations of NAREIT FFO to net income.

The increase in net income attributable to the controlling interests is primarily due to higher gains on sale of real estate ($10.6 million), lower interest expense ($6.4 million), higher NOI ($4.1 million) and lower acquisition costs ($0.9 million) in 2016 and a real estate impairment charge ($5.9 million) in 2015.

The NOI increase is primarily due to income associated with acquisitions ($11.7 million), the lease-up of Silverline Center ($3.1 million) and The Maxwell ($2.3 million), and higher rental rates ($3.5 million) at same-store properties. These were partially offset by properties sold during 2015 and 2016 ($12.6 million), lower occupancy ($1.6 million) at the Army Navy Building, which is under redevelopment, and lower occupancy ($1.2 million) and higher real estate taxes ($1.0 million) at same-store properties.

The increase in NAREIT FFO primarily reflects lower interest expense ($6.4 million), higher NOI ($4.1 million) and lower acquisition costs ($0.9 million) in 2016 and the real estate impairment charge ($5.9 million) in 2015.

Investment Activity

Significant investment transactions during 2016 included the following:

• The acquisition of Riverside Apartments, a multifamily property consisting of three buildings totaling 1,222 units in Alexandria, Virginia, and an adjacent undeveloped land parcel with potential to develop additional units, in May 2016 for a contract purchase price of $244.8 million. We incurred $1.2 million of acquisition costs.

• The sale of Dulles Station, Phase II, which consisted of land held for future development and an interest in a parking garage in Herndon, Virginia, in May 2016 for $12.1 million. We recognized a gain on sale of real estate of $0.5 million.

• The completion of the first sale transaction with respect to the Maryland Office Portfolio (for the sale of 6110 Executive Boulevard, Wayne Plaza, 600 Jefferson Plaza and West Gude Drive) in June 2016 for $111.5 million. We recognized a gain on sale of real estate of $23.6 million.

• The completion of the second sale transaction with respect to the Maryland Office Portfolio (for the sale of 51 Monroe Street and One Central Plaza) in September 2016 for $128.5 million. We recognized a gain on sale of real estate of $77.6 million.

Financing Activity

Significant financing transactions during 2016 included the following:

• The exercise of our right to purchase the $32.2 million construction loan secured by The Maxwell without penalty from the lender in January 2016. This entity is a consolidated subsidiary, and therefore, following our purchase of the construction loan, the loan became an intercompany payable that is eliminated in consolidation.

• The prepayment at par of the remaining $50.9 million of the mortgage note secured by John Marshall II in February 2016.

• The issuance in May 2016 of approximately 5.3 million common shares at a price to the public of $28.20 per share, for net proceeds of approximately $143.4 million.

• The repayment at par of the remaining $81.0 million of mortgage notes secured by 3801 Connecticut Avenue, Bethesda Hill Apartments and Walker House Apartments in June 2016.

• The execution in July 2016 of a seven year, $150 million unsecured term loan agreement maturing on July 21, 2023 with a deferred draw period of up to six months. We borrowed $100.0 million on the term loan in the fourth quarter of 2016, and borrowed the remaining $50.0 million subsequent to the end of 2016. We used the proceeds to refinance maturing secured debt. We also entered into interest rate derivatives to swap from a LIBOR plus 165 basis points floating rate to a 2.86% all-in fixed interest rate commencing on March 31, 2017 and extending until the maturity date of July 21, 2023.

• The prepayment at par of the remaining $101.9 million of the mortgage note secured by 2445 M Street in October 2016.

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• The issuance of approximately 0.9 million common shares under our ATM program at a weighted average price to the public of $33.32 per share, for net proceeds of approximately $29.6 million.

As of December 31, 2016, the interest rate on the facility is one month LIBOR plus 1.0% and the one month LIBOR was 0.77% as of that date. As of February 16, 2017, our Revolving Credit Facility has a borrowing capacity of $478.0 million.

Capital Requirements

Subsequent to the end of 2016, we prepaid at par the remaining $49.6 million of the mortgage note secured by Army Navy Building using borrowings on our 2016 Term Loan. We do not have any other debt maturities during 2017. We expect to have the additional capital requirements as set forth on page 40 (Liquidity and Capital Resources - Capital Structure).

Results of Operations

The discussion that follows is based on our consolidated results of operations for the three years ended December 31, 2016. The ability to compare one period to another is significantly affected by acquisitions completed and dispositions made during those years (see note 3 to the consolidated financial statements).

Net Operating Income

NOI is a non-GAAP measure calculated as real estate rental revenue less real estate expenses excluding depreciation and amortization and general and administrative expenses. NOI is the primary performance measure we use to assess the results of our operations at the property level. We believe that NOI is useful as a performance measure because, when compared across periods, NOI reflects the impact on operations of trends in occupancy rates, rental rates and operating costs on an unleveraged basis, providing perspective not immediately apparent from net income. NOI excludes certain components from net income in order to provide results more closely related to a property’s results of operations. For example, interest expense is not necessarily linked to the operating performance of a real estate asset. In addition, depreciation and amortization, because of historical cost accounting and useful life estimates, may distort operating performance at the property level. As a result of the foregoing, we provide NOI as a supplement to net income, calculated in accordance with GAAP. NOI does not represent net income or income from continuing operations, in either case calculated in accordance with GAAP. As such, it should not be considered an alternative to these measures as an indication of our operating performance. A reconciliation of NOI to net income follows.

31

2016 Compared to 2015

The following tables reconcile NOI to net income attributable to the controlling interests and provide the basis for our discussion of our consolidated results of operations and NOI in 2016 compared to 2015. All amounts are in thousands except percentage amounts.

									Non-Same-Store
	Same-Store								Acquisitions (1)				Development/Redevelopment (2)				Dispositions (3) (continuing operations)				All Properties
	2016		2015		$  Change		%  Change		2016		2015		2016		2015		2016		2015		2016			2015			$  Change			%  Change
Real estate rental revenue	$	243,858	$	239,865	$	3,993	1.7	%	$	26,477	$	6,797	$	22,662	$	18,952	$	20,267	$	40,813	$	313,264		$	306,427		$	6,837		2.2	%
Real estate expenses	86,814		84,708		2,106		2.5	%	10,706		2,708		9,997		9,394		7,496		15,424		115,013			112,234			2,779			2.5	%
NOI	$	157,044	$	155,157	$	1,887	1.2	%	$	15,771	$	4,089	$	12,665	$	9,558	$	12,771	$	25,389	$	198,251		$	194,193		$	4,058		2.1	%
Reconciliation to net income attributable to the controlling interests:
Depreciation and amortization																					(108,406		)	(108,935		)	529			(0.5	)%
Acquisition costs																					(1,178		)	(2,056		)	878			(42.7	)%
General and administrative expenses																					(19,545		)	(20,123		)	578			(2.9	)%
Casualty gain and impairment (loss), net																					676			(5,909		)	6,585			(111.4	)%
Gain on sale of real estate																					101,704			91,107			10,597			11.6	%
Interest expense																					(53,126		)	(59,546		)	6,420			(10.8	)%
Other income																					297			709			(412		)	(58.1	)%
Loss on extinguishment of debt																					—			(119		)	119			(100.0	)%
Income tax benefit (expense)																					615			(134		)	749			(559.0	)%
Net income																					119,288			89,187			30,101			33.8	%
Less: Net income attributable to noncontrolling interests																					51			553			(502		)	(90.8	)%
Net income attributable to the controlling interests																					$	119,339		$	89,740		29,599			33.0	%

⁽¹⁾  Acquisitions:

2016 Multifamily – Riverside Apartments

2015 Multifamily – The Wellington

⁽²⁾  Development/redevelopment properties:

Multifamily development property – The Maxwell

Office redevelopment properties – Silverline Center and Army Navy Building

⁽³⁾  Dispositions:

2016 Office – 6110 Executive Boulevard, 600 Jefferson Plaza, Wayne Plaza, West Gude Drive, 51 Monroe Street and One Central Plaza

2015 Multifamily – Country Club Towers and Munson Hill Towers    

2015 Retail – Montgomery Village Center

Real Estate Rental Revenue

Real estate rental revenue is comprised of (a) minimum base rent, which includes rental revenues recognized on a straight-line basis, (b) revenue from the recovery of operating expenses from our tenants, (c) provisions for doubtful accounts in the same quarter that we established the receivable, which include provisions for straight-line receivables, (d) revenue from the collection of lease termination fees and (e) parking and other tenant charges such as percentage rents.

Real estate rental revenue for same-store properties for the two years ended December 31, 2016 was as follows (in thousands, except percentage amounts):

	Year Ended December 31,
	2016			2015			$ Change			% Change
Minimum base rent	$	202,965		$	201,571		$	1,394		0.7	%
Recoveries from tenants	29,642			28,558			1,084			3.8	%
Provision for doubtful accounts	(909		)	(1,455		)	546			(37.5	)%
Lease termination fees	1,032			1,196			(164		)	(13.7	)%
Parking and other tenant charges	11,128			9,995			1,133			11.3	%
Total same-store real estate rental revenue	$	243,858		$	239,865		$	3,993		1.7	%

• Minimum base rent: Increase primarily due to higher rental rates ($3.5 million), partially offset by lower occupancy ($1.2

32

million), higher abatements ($0.6 million) and lower amortization of net intangible lease liabilities ($0.3 million).

• Recoveries from tenants: Increase primarily due to higher reimbursements for operating expenses ($0.7 million) and real estate taxes ($0.3 million) due to higher expenses.

• Provision for doubtful accounts: Decrease primarily due to lower provisions in the office segment ($0.6 million).

• Lease termination fees: Decrease primarily due to lower fees in the retail ($0.2 million) and office ($0.1 million) segments, partially offset by higher fees in the multifamily ($0.2 million) segment.

• Parking and other tenant charges: Increase primarily due to higher parking income ($0.6 million) primarily in the office segment, move-in charges ($0.1 million) in the multifamily segment and short term rent ($0.1 million) and percentage rent ($0.1 million) in the retail segment.

Real estate rental revenue from same-store properties by segment for the two years ended December 31, 2016 was as follows (in thousands, except percentage amounts):

	Year Ended December 31,
	2016		2015		$ Change		% Change
Office	$	126,959	$	124,963	$	1,996	1.6	%
Multifamily	55,333		54,502		831		1.5	%
Retail	61,566		60,400		1,166		1.9	%
Total same-store real estate rental revenue	$	243,858	$	239,865	$	3,993	1.7	%

• Office: Increase primarily due to higher rental rates ($2.1 million), lower provisions for uncollectible accounts ($0.6 million), and higher parking income ($0.4 million), partially offset by higher rent abatements ($1.0 million) and lower occupancy ($0.1 million).

• Multifamily: Increase primarily due to higher occupancy ($0.3 million), lower rent abatements ($0.3 million) and higher rental rates ($0.2 million).

• Retail: Increase primarily due to higher rental rates ($1.2 million), reimbursements ($1.1 million), percentage rent ($0.1 million) and parking income ($0.1 million), partially offset by lower occupancy ($1.4 million).

Real estate rental revenue from acquisitions increased due to the acquisition of Riverside Apartments ($13.1 million) in 2016 and having the full year impact of The Wellington acquisition ($6.6 million) in 2015.

Real estate rental revenue from development/redevelopment properties increased primarily due to higher occupancy at Silverline Center ($3.1 million) and The Maxwell ($2.3 million), partially offset by lower occupancy ($1.6 million) at the Army Navy Building, which is under redevelopment.

Occupancy represents occupied square footage indicated as a percentage of total square footage as of the last day of that period. Occupancy for properties classified as continuing operations by segment for the two years ended December 31, 2016 was as follows:

	December 31, 2016						December 31, 2015						Increase (decrease)
Segment	Same-Store		Non-Same-Store		Total		Same-Store		Non-Same-Store		Total		Same-Store		Non-Same-Store		Total
Office	92.1	%	86.5	%	91.1	%	91.0	%	82.0	%	87.6	%	1.1	%	4.5	%	3.5	%
Multifamily	96.0	%	92.9	%	94.5	%	94.3	%	91.6	%	93.4	%	1.7	%	1.3	%	1.1	%
Retail	95.7	%	N/A		95.7	%	91.5	%	N/A		91.5	%	4.2	%	—		4.2	%
Total	94.3	%	91.3	%	93.5	%	92.1	%	85.4	%	90.2	%	2.2	%	5.9	%	3.3	%

• Office: The increase in same-store occupancy was primarily due to higher occupancy at 1775 Eye Street, 1600 Wilson Boulevard and 1776 G Street, partially offset by lower occupancy at Monument II. The increase in non-same-store occupancy was primarily due to higher occupancy at Silverline Center, partially offset by lower occupancy at the Army Navy Building.

• Multifamily: The increase in same-store occupancy was primarily due to higher occupancy at 3801 Connecticut Avenue and The Ashby. The increase in non-same-store occupancy was primarily due to the lease-up of The Maxwell.

• Retail: The increase in same-store occupancy was primarily due to higher occupancy at Chevy Chase Metro Center, Bradlee Shopping Center and Montrose Shopping Center.

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During 2016, we executed new and renewal leases in our office and retail segments as follows:

	Square Feet (in millions)	Average Rental Rate (per square foot)		% Rental Rate Increase		Leasing Costs (1) (per square foot)		Free Rent (weighted average months)	Retention Rate
Office	0.6	$	41.67	13.2	%	$	41.24	5.3	67.1	%
Retail	0.2	31.32		19.4	%	11.89		1.2	82.4	%
Total	0.8	38.96		14.5	%	33.54		4.4	71.4	%

⁽¹⁾ Consist of tenant improvements and leasing commissions.

Real Estate Expenses

Real estate expenses as a percentage of revenue for the two years ended December 31, 2016 were 36.7% and 36.6%, respectively.

Real estate expenses from same-store properties by segment for the two years ended December 31, 2016 were as follows (in thousands):

	Year Ended December 31,
	2016		2015		$ Change			% Change
Office	$	48,312	$	47,385	$	927		2.0	%
Multifamily	22,642		22,660		(18		)	(0.1	)%
Retail	15,860		14,663		1,197			8.2	%
Total same-store real estate expenses	$	86,814	$	84,708	$	2,106		2.5	%

• Office: Increase primarily due to higher real estate taxes ($0.3 million), repairs and maintenance ($0.3 million), operating services and supplies ($0.3 million) and bad debt ($0.2 million) expenses, partially offset by lower utilities expenses ($0.4 million) due to lower usage of electricity.

• Multifamily: Slight decrease primarily due to lower property management ($0.2 million) and administrative ($0.2 million)expenses, offset by higher bad debt expense ($0.3 million) related to a retail restaurant tenant at Bennett Park.

• Retail: Increase primarily due to higher real estate tax ($0.7 million), legal ($0.1 million), advertising ($0.1 million), repairs and maintenance ($0.1 million) and common area maintenance ($0.1 million) expenses.

Other Expenses

Depreciation and Amortization: Decrease primarily due to dispositions ($8.2 million), partially offset by acquisitions ($7.0 million) and higher depreciation at development/redevelopment properties ($0.8 million).

Acquisition Costs: Decrease primarily due to lower costs associated with the Riverside Apartments acquisition in 2016 as compared to The Wellington acquisition in 2015.

General and Administrative Expenses: Decrease primarily due to lower share-based compensation ($1.5 million) primarily due to a higher number of forfeitures during 2016 and lower consulting fees ($0.3 million), partially offset by a higher estimate of short-term incentive compensation ($0.8 million) and severance and retention expenses ($0.6 million) associated with the disposition of the Maryland Office Portfolio.

Casualty gain and impairment (loss), net: The casualty gain in 2016 represents the gain recognized upon the receipt of insurance proceeds related to damage from a fire at Bethesda Hill Towers during the first quarter of 2015 that damaged four units. An impairment loss in the second quarter of 2015 reduced the carrying value of our interest in a joint venture to develop a multifamily property at 1225 First Street to its estimated fair value. We subsequently disposed of our interest in the joint venture during 2015.

Gain on sale of real estate: Increase due to completion of the sales of Dulles Station II and the Maryland Office Portfolio during 2016, as compared to the gains on the sale of Country Club Towers, Munson Hill Towers and Montgomery Village Center during 2015.

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Interest Expense: Interest expense by debt type for the two years ended December 31, 2016 was as follows (in thousands, except percentage amounts):

	Year Ended December 31,
Debt Type	2016			2015			$ Change			% Change
Notes payable	$	33,439		$	32,730		$	709		2.2	%
Mortgage notes payable	14,654			22,684			(8,030		)	(35.4	)%
Lines of credit	5,701			4,790			911			19.0	%
Capitalized interest	(668		)	(658		)	(10		)	1.5	%
Total	$	53,126		$	59,546		$	(6,420	)	(10.8	)%

• Notes payable: Increase primarily due to executing a $150.0 million term loan in September 2015 and borrowing $100.0 million on another term loan facility in December 2016, partially offset by the repayment of $150.0 million of our 5.35% senior notes in May 2015.

• Mortgage notes payable: Decrease primarily due to the repayment of the mortgage notes secured by John Marshall II, 3801 Connecticut Avenue, Bethesda Hill Apartments, Walker House Apartments and 2445 M Street, and the purchase of the construction loan secured by The Maxwell (a consolidated entity) during 2016.

• Lines of credit: Increase primarily due to weighted average daily borrowings of $215.0 million during 2016, as compared to $167.6 million during 2015.

• Capitalized interest: Small increase primarily due to capitalization of interest on spending related to the multifamily development adjacent to The Wellington, offset by placing into service our development project at The Maxwell and redevelopment project at Silverline Center.

Income tax benefit (expense): The income tax benefit in 2016 resulted from a reduction of the valuation allowance on a deferred tax asset at one of our taxable REIT subsidiaries due to a net operating loss as a result of the sale of Dulles Station II. We have concluded that there is sufficient positive evidence as of December 31, 2016 that it is more likely than not that a portion of the deferred tax asset related to the net operating loss is realizable.

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2015 Compared to 2014

The following tables reconcile NOI to net income attributable to the controlling interests and provide the basis for our discussion of our consolidated results of operations and NOI in 2015 compared to 2014. All amounts are in thousands except percentage amounts.

									Non-Same-Store
	Same-Store								Acquisitions (1)				Development/Redevelopment (2)				Dispositions (3) (continuing operations)				All Properties
	2015		2014		$  Change		%  Change		2015		2014		2015		2014		2015		2014		2015			2014			$  Change			%  Change
Real estate rental revenue	$	255,165	$	250,956	$	4,209	1.7	%	$	31,643	$	16,260	$	11,229	$	9,090	$	8,390	$	12,331	$	306,427		$	288,637		$	17,790		6.2	%
Real estate expenses	89,690		86,328		3,362		3.9	%	12,651		6,754		6,569		5,302		3,324		5,311		112,234			103,695			8,539			8.2	%
NOI	$	165,475	$	164,628	$	847	0.5	%	$	18,992	$	9,506	$	4,660	$	3,788	$	5,066	$	7,020	$	194,193		$	184,942		$	9,251		5.0	%
Reconciliation to net income attributable to the controlling interests:
Depreciation and amortization																					(108,935		)	(96,011		)	(12,924		)	13.5	%
Acquisition costs																					(2,056		)	(5,710		)	3,654			(64.0	)%
General and administrative expenses																					(20,123		)	(19,644		)	(479		)	2.4	%
Real estate impairment																					(5,909		)	—			(5,909		)	—
Gain on sale of real estate																					91,107			570			90,537			—
Interest expense																					(59,546		)	(59,785		)	239			(0.4	)%
Other income																					709			825			(116		)	(14.1	)%
Loss on extinguishment of debt																					(119		)	—			(119		)	—
Income tax expense																					(134		)	(117		)	(17		)	14.5	%
Discontinued operations (4):
Income from properties sold or held for sale																					—			546			(546		)	(100.0	)%
Gain on sale of real estate																					—			105,985			(105,985		)	(100.0	)%
Net income																					89,187			111,601			(22,414		)	(20.1	)%
Less: Net income attributable to noncontrolling interests																					553			38			515			—
Net income attributable to the controlling interests																					$	89,740		$	111,639		(21,899		)	(19.6	)%

⁽¹⁾  Acquisitions:

2015 Multifamily – The Wellington

2014 Multifamily – Yale West

2014 Office – The Army Navy Building and 1775 Eye Street, NW

2014 Retail– Spring Valley Retail Center

⁽²⁾  Development/redevelopment properties:

Multifamily development property – The Maxwell

Office redevelopment property – Silverline Center

⁽³⁾  Dispositions (classified as continuing operations):

2015 Multifamily – Country Club Towers and Munson Hill Towers    

2015 Retail – Montgomery Village Center

2014 Retail – 5740 Columbia Road (parcel at Gateway Overlook)

⁽⁴⁾  Discontinued operations include gains on sale and income from operations for:

2014 Medical Office – Woodburn Medical Office Park I and II and Prosperity Medical Center I, II and III

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Real Estate Rental Revenue

Real estate rental revenue for same-store properties for the two years ended December 31, 2015 was as follows (in thousands, except percentage amounts):

	Year Ended December 31,
	2015			2014			$ Change		% Change
Minimum base rent	$	215,692		$	213,479		$	2,213	1.0	%
Recoveries from tenants	27,374			26,900			474		1.8	%
Provision for doubtful accounts	(1,651		)	(1,698		)	47		(2.8	)%
Lease termination fees	1,297			622			675		108.5	%
Parking and other tenant charges	12,453			11,653			800		6.9	%
Total same-store real estate rental revenue	$	255,165		$	250,956		$	4,209	1.7	%

• Minimum base rent: Increase primarily due to higher rental rates ($1.9 million) and occupancy ($1.9 million), partially offset by higher amortization of capitalized lease incentives ($0.9 million), rent abatements ($0.5 million) and amortization of intangible lease assets ($0.2 million).

• Recoveries from tenants: Increase primarily due to higher reimbursements for real estate taxes ($0.6 million).

• Provision for doubtful accounts: Decrease primarily due to lower provisions in the retail segment ($0.1 million).

• Lease termination fees: Increase primarily due to higher fees in the office ($0.4 million), retail ($0.2 million) and multifamily ($0.1 million) segments.

• Parking and other tenant charges: Increase primarily due to higher parking income ($0.5 million) in the office segment, short term lease income ($0.1 million) in the retail segment and business interruption insurance proceeds ($0.1 million) in the multifamily segment.

Real estate rental revenue from same-store properties by segment for the two years ended December 31, 2015 was as follows (in thousands, except percentage amounts):

	Year Ended December 31,
	2015		2014		$ Change		% Change
Office	$	149,664	$	146,542	$	3,122	2.1	%
Multifamily	48,739		48,286		453		0.9	%
Retail	56,762		56,128		634		1.1	%
Total same-store real estate rental revenue	$	255,165	$	250,956	$	4,209	1.7	%

• Office: Increase primarily due to higher occupancy ($1.7 million), higher rental rates ($1.3 million), higher reimbursements for real estate taxes ($0.6 million), higher parking income ($0.5 million) and higher lease termination fees ($0.4 million), partially offset by higher rent abatements ($1.7 million).

• Multifamily: Increase primarily due to higher occupancy ($1.0 million) and lower rent abatements ($0.3 million), partially offset by lower rental rates ($0.8 million).

• Retail: Increase primarily due to higher rental rates ($1.4 million), partially offset by lower occupancy ($0.7 million).

Real estate rental revenue from acquisitions increased due to the acquisition of The Wellington in 2015 and having the full year impact of the acquisitions executed in 2014. Real estate rental revenue from development/redevelopment properties increased primarily due to placing The Maxwell into service ($2.0 million).

Occupancy represents occupied square footage indicated as a percentage of total square footage as of the last day of that period. Occupancy for properties classified as continuing operations by segment for the two years ended December 31, 2015 was as follows:

	December 31, 2015						December 31, 2014						Increase (decrease)
Segment	Same-Store		Non-Same-Store		Total		Same-Store		Non-Same-Store		Total		Same-Store		Non-Same-Store		Total
Office	90.8	%	71.9	%	87.6	%	92.1	%	61.4	%	86.9	%	(1.3	)%	10.5	%	0.7	%
Multifamily	94.2	%	92.2	%	93.4	%	93.7	%	94.0	%	93.8	%	0.5	%	(1.8	)%	(0.4	)%
Retail	91.4	%	96.6	%	91.5	%	95.1	%	88.7	%	94.4	%	(3.7	)%	7.9	%	(2.9	)%
Total	91.8	%	84.2	%	90.2	%	93.3	%	77.3	%	90.5	%	(1.5	)%	6.9	%	(0.3	)%

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• Office: The decrease in same-store occupancy was primarily due to lower occupancy at 1776 G Street and Quantico Corporate Center, partially offset by higher occupancy at 1600 Wilson Boulevard. The increase in non-same-store occupancy was primarily due to higher occupancy at Silverline Center and 1775 Eye Street.

• Multifamily: The increase in same-store occupancy was primarily due to higher occupancy at The Kenmore and The Paramount. The decrease in non-same-store occupancy was primarily due placing The Maxwell into service, which was 89.3% occupied at the end of 2015.

• Retail: The decrease in same-store occupancy was primarily due to lower occupancy at Chevy Chase Metro Center, Montrose Shopping Center and Bradlee Shopping Center, partially offset by higher occupancy at Concord Centre. The increase in non-same-store occupancy reflects higher occupancy at Spring Valley Retail Center and the disposition of Montgomery Village Center during the fourth quarter of 2015.

During 2015, we executed new and renewal leases in our office and retail segments as follows:

	Square Feet (in millions)	Average Rental Rate (per square foot)		% Rental Rate Increase		Leasing Costs (1)  (per square foot)		Free Rent (weighted average months)	Retention Rate
Office	0.9	$	36.32	9.0	%	$	40.08	4.8	66.3	%
Retail	0.4	23.97		18.5	%	21.21		1.6	76.2	%
Total	1.3	32.36		11.1	%	34.03		4.0	70.7	%

⁽¹⁾ Consist of tenant improvements and leasing commissions.

Real Estate Expenses

Real estate expenses as a percentage of revenue for the two years ended December 31, 2015 were 36.6% and 35.9%, respectively.

Real estate expenses from same-store properties by segment for the two years ended December 31, 2015 were as follows (in thousands):

	Year Ended December 31,
	2015		2014		$ Change		% Change
Office	$	55,486	$	54,266	$	1,220	2.2	%
Multifamily	20,412		19,370		1,042		5.4	%
Retail	13,792		12,692		1,100		8.7	%
Total same-store real estate expenses	$	89,690	$	86,328	$	3,362	3.9	%

• Office: Increase primarily due to higher real estate taxes ($1.0 million), custodial services ($0.2 million), repairs and maintenance expenses ($0.1 million) and administrative expenses ($0.1 million), partially offset by lower utilities expenses ($0.6 million) due to lower usage of electricity.

• Multifamily: Increase primarily due to higher property management expenses ($0.5 million), advertising expenses ($0.1 million), lease commissions ($0.1 million) and real estate taxes ($0.1 million).

• Retail: Increase primarily due to higher bad debt expense ($0.7 million), real estate taxes ($0.2 million) and legal fees ($0.1 million).

Other Expenses

Depreciation and Amortization: Increase primarily due to acquisitions ($9.6 million) and placing development/redevelopment properties into service ($3.8 million).

Acquisition Costs: Decrease primarily due to one acquisition ($167.0 million) in 2015, as compared to four acquisitions ($297.0 million) in 2014.

General and Administrative Expenses: Increase primarily due to higher professional fees ($1.7 million), partially offset by lower administrative depreciation ($0.7 million) due to accelerated depreciation of leasehold improvements in 2014 related to the relocation of the corporate headquarters to Washington, DC and lower severance expense ($0.6 million).

Real Estate Impairment: In November 2011, we executed a joint venture operating agreement with a real estate development company to develop a high-rise multifamily property at 1225 First Street in Alexandria, Virginia. During the second quarter of 2015, we determined that we would not develop 1225 First Street and began negotiations to sell our 95% interest in the joint venture that owns the property,

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and recognized a $5.9 million impairment charge in order to reduce the carrying value of the property to its estimated fair value. We based this fair value on the $14.5 million sale price in the purchase and sale agreement to sell our 95% interest in the joint venture that we executed during the third quarter of 2015.

Interest Expense: Interest expense by debt type for the two years ended December 31, 2015 was as follows (in thousands, except percentage amounts):

	Year Ended December 31,
Debt Type	2015			2014			$ Change			% Change
Notes payable	$	32,730		$	37,424		$	(4,694	)	(12.5	)%
Mortgage notes payable	22,684			21,916			768			3.5	%
Lines of credit	4,790			2,587			2,203			85.2	%
Capitalized interest	(658		)	(2,142		)	1,484			(69.3	)%
Total	$	59,546		$	59,785		$	(239	)	(0.4	)%

• Notes payable: Decrease primarily due to the repayment of $150.0 million of our 5.35% senior notes in May 2015, partially offset by executing the $150.0 million term loan in September 2015.

• Mortgage notes payable: Increase primarily due to the full-year impact of the assumption of mortgages totaling $107.1 million with the acquisitions of Yale West and The Army Navy Building in 2014.

• Lines of credit: Increase primarily due to weighted average daily borrowings of $167.6 million during 2015, as compared to $12.8 million during 2014.

• Capitalized interest: Decrease primarily due to placing into service our development project at The Maxwell and redevelopment project at Silverline Center.

Discontinued Operations

Income from operations of properties classified as discontinued operations for the two years ended December 31, 2015 were as follows (in thousands, except for percentages):

	Year Ended December 31,
	2015		2014			$ Change			% Change
Revenues	$	—	$	892		$	(892	)	(100.0	)%
Property expenses	—		(346		)	346			100.0	%
Total	$	—	$	546		$	(546	)	(100.0	)%

The decrease is due to the completion of the sale of the former medical office segment during the first quarter of 2014.

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Liquidity and Capital Resources

Capital Structure

We manage our capital structure to reflect a long-term investment approach, generally seeking to match the cash flow of our assets with a mix of equity and various debt instruments. We expect that our capital structure will allow us to obtain additional capital from diverse sources that could include additional equity offerings of common shares, public and private secured and unsecured debt financings, asset dispositions, operating units and joint venture equity. Our ability to raise funds through the incurrence of debt and issuance of equity securities is dependent on, among other things, general economic conditions, general market conditions for REITs, our operating performance, our debt rating and the current trading price of our common shares. We analyze which source of capital we believe to be most advantageous to us at any particular point in time.

As of February 16, 2017, we had cash and cash equivalents of approximately $15.1 million and availability under our Revolving Credit Facility of $478.0 million.We currently expect that our potential sources of liquidity for acquisitions, development, redevelopment, expansion and renovation of properties, and operating and administrative expenses, may include:

• Cash flow from operations;

• Borrowings under our Revolving Credit Facility or other new short-term facilities;

• Issuances of our equity securities and/or common units in operating partnerships;

• Issuances of preferred shares;

• Proceeds from long-term secured or unsecured debt financings, including construction loans and term loans;

• Investment from joint venture partners; and

• Net proceeds from the sale of assets.

During 2017, we expect that we will have significant capital requirements, including the following items:

• Funding dividends and distributions to our shareholders;

• $49.6 million to repay or refinance our secured notes scheduled to mature in 2017;

• Approximately $70 - $75 million to invest in our existing portfolio of operating assets, including approximately $35 - $40 million to fund tenant-related capital requirements and leasing commissions;

• Approximately $45 - $50 million to invest in our development and redevelopment projects; and

• Funding for potential property acquisitions throughout 2017, offset by proceeds from potential property dispositions.

There can be no assurance that our capital requirements will not be materially higher or lower than the above expectations. We currently believe that we will generate sufficient cash flow from operations and expected property sales and have access to the capital resources necessary to fund our requirements in 2017. However, as a result of general market conditions in the greater Washington metro region, economic conditions affecting the ability to attract and retain tenants, rising interest rates or declines in our share price, unfavorable changes in the supply of competing properties, or our properties not performing as expected, we may not generate sufficient cash flow from operations and property sales or otherwise have access to capital on favorable terms, or at all. If we are unable to obtain capital from other sources, we may need to alter capital spending to be materially different than what is stated in the prior paragraph. If capital were not available, we may be unable to satisfy the distribution requirement applicable to REITs, make required principal and interest payments, make strategic acquisitions or make necessary and/or routine capital improvements or undertake improvement/redevelopment opportunities with respect to our existing portfolio of operating assets.

Debt Financing

We generally use secured or unsecured, corporate-level debt, including unsecured notes, our Revolving Credit Facility, bank term loans and mortgages, to meet our borrowing needs. Long-term, we generally use fixed rate debt instruments in order to match the returns from our real estate assets. We also utilize variable rate debt for short-term financing purposes. At times, our mix of variable and fixed rate debt may not suit our needs. At those times, we may use derivative financial instruments including interest rate swaps and caps, forward interest rate options or interest rate options in order to assist us in managing our debt mix. We may either hedge our variable rate debt to give it an effective fixed interest rate or hedge fixed rate debt to give it an effective variable interest rate.

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At December 31, 2016 and 2015, our debt was as follows (in thousands):

	December 31,
	2016		2015
Mortgage notes payable, net (1)	$	148,540	$	418,052
Unsecured lines of credit payable (1)	120,000		105,000
Unsecured notes payable, net (1)	843,084		743,181
	$	1,111,624	$	1,266,233

⁽¹⁾ See notes 4, 5 and 6 to the consolidated financial statements for further detail on our debt.

Our future debt principal payments are scheduled as follows (in thousands):

Year	Mortgage Notes Payable				Unsecured Notes Payable			Unsecured Line of Credit Payable		Total Debt
2017	$	52,571		(1)	$	—		$	—	$	52,571
2018	3,135				—			—		3,135
2019	33,909				—			120,000		153,909
2020	2,659				250,000			—		252,659
2021	2,829				150,000			—		152,829
Thereafter	49,382				450,000			—		499,382
	144,485				850,000			120,000		1,114,485
Premiums and discounts, net	4,354				(1,971		)	—		2,383
Debt issuance costs, net	(299		)		(4,945		)	—		(5,244		)
Total	$	148,540			$	843,084		$	120,000	$	1,111,624

⁽¹⁾ Primarily comprised of the $49.6 million unpaid principal balance of the mortgage note secured by Army Navy Building, which was prepaid at par in February 2017 using borrowings on the 2016 Term Loan.

If principal amounts due at maturity cannot be refinanced, extended or paid with proceeds of other capital transactions, such as new equity capital, our cash flow may be insufficient to repay all maturing debt. Prevailing interest rates or other factors at the time of a refinancing, such as possible reluctance of lenders to make commercial real estate loans, may result in higher interest rates and increased interest expense or inhibit our ability to finance our obligations.

Mortgage Debt

At December 31, 2016, our mortgage notes payable bore an effective weighted average fair value interest rate of 4.0% and had a weighted average maturity of 3.0 years. We may either initiate secured mortgage debt or assume mortgage debt from time-to-time in conjunction with property acquisitions.

Unsecured Credit Facility and Term Loan

During the second quarter of 2015, we terminated our $100.0 million unsecured line of credit maturing in June 2015 and our $400.0 million unsecured line of credit maturing in July 2016, and executed a new $600.0 million unsecured credit agreement ("Revolving Credit Facility") that matures in June 2019, unless extended pursuant to one or both of the two six-month extension options. The Revolving Credit Facility is our primary source of liquidity. We can borrow up to $600.0 million under this line, which bears interest at an adjustable spread over one month LIBOR based on our public debt rating. The Revolving Credit Facility has an accordion feature 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. 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 our credit rating). The base rate is the highest of the administrative agent's prime rate, the federal funds rate plus 0.50% and the one month 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 our credit rating) on the $600.0 million committed capacity, without regard to usage. As of December 31, 2016, the interest rate on the facility is one month LIBOR plus 1.00% and the facility fee is 0.20%.

During the third quarter of 2015, we executed a $150.0 million unsecured term loan by exercising a portion of the accordion feature under the Revolving Credit Facility. The term loan has a 5.5 year term scheduled to mature onMarch 15, 2021and currently has

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an interest rate of one month LIBOR plus 110 basis points, based on our current unsecured debt ratings. We entered into two interest rate swap arrangements with a total notional amount of $150.0 million to swap the floating interest rate to an all-in fixed interest rate of 2.72% starting on October 15, 2015 and extending until the maturity of the term loan on March 15, 2021.

Our Revolving Credit Facility contains financial and other covenants with which we must comply. Some of these covenants include:

• A maximum ratio of 60.0% of consolidated total indebtedness to consolidated total asset value, calculated using an estimate of fair market value of our assets;

• A maximum ratio of 40.0% of secured indebtedness to consolidated total asset value, calculated using an estimate of fair market value of our assets;

• A minimum ratio of 1.50 of quarterly adjusted EBITDA (earnings before noncontrolling interests, interest expense, income tax expense, depreciation, amortization, acquisition costs, and extraordinary, unusual or nonrecurring gains and losses) to consolidated fixed charges, including interest expense;

• A minimum ratio of 1.75 of adjusted net operating income from our unencumbered properties to consolidated unsecured interest expense; and

• A maximum ratio of 60.0% of total unsecured indebtedness to unencumbered asset value, calculated using an estimate of fair market value of our assets.

Failure to comply with any of the covenants under our Revolving Credit Facility or other debt instruments could result in a default under one or more of our Revolving Credit Facility's covenants. This could cause our lenders to accelerate the timing of payments and would therefore have a material adverse effect on our business, operations, financial condition and liquidity. In addition, our ability to draw on our Revolving Credit Facility or incur other unsecured debt in the future could be restricted by the Revolving Credit Facility's covenants. As of December 31, 2016, we were in compliance with the Revolving Credit Facility's covenants.

Unsecured Notes

We generally issue unsecured notes to fund our real estate assets long-term. In issuing future unsecured notes, we seek to ladder the maturities of our debt to mitigate exposure to interest rate risk in any particular future year.

During the third quarter of 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 the one-month LIBOR rate 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 subsequent to the end of 2016. We used the proceeds to refinance maturing secured debt. We also entered into forward interest rate derivatives commencing on March 31, 2017 to effectively fix the interest rate on the 2016 Term Loan at 2.86% (see note 7 to the consolidated financial statements).

Depending upon market conditions, opportunities to issue unsecured notes on attractive terms may not be available. During periods in the recent past, debt capital was essentially unavailable for extended periods of time. While debt markets have improved, it is difficult to predict if the improvement is sustainable.

Our unsecured notes contain covenants with which we must comply, including:

• A maximum ratio of 65.0% of total indebtedness to total assets;

• A maximum ratio of 40.0% of secured indebtedness to total assets;

• A maximum ratio of 1.50 of our income available for debt service payments to required debt service payments; and

• A maximum ratio of 1.50 of total unencumbered assets to total unsecured indebtedness.

Failure to comply with any of the covenants under our unsecured notes or other debt instruments could result in a default under one or more of our unsecured note covenants. This could cause our debt holders to accelerate the timing of payments and would therefore have a material adverse effect on our business, operations, financial condition and liquidity. As of December 31, 2016, we were in compliance with our unsecured note covenants. In addition, our ability to draw on our Revolving Credit Facility or incur other unsecured debt in the future could be restricted by our unsecured note covenants.

From time to time, we may seek to repurchase and cancel our outstanding unsecured notes through open market purchases, privately negotiated transactions or otherwise. Such repurchases, if any, will depend on prevailing market conditions, our liquidity

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requirements, contractual restrictions and other factors. The amounts involved may be material.

Common Equity

We have authorized for issuance 100.0 million common shares, of which approximately 74.6 million shares were outstanding at December 31, 2016.

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 and sale of up to $200.0 million of our common shares from time to time. Sales of our common shares are made at market prices prevailing at the time of sale. We intend to use net proceeds from the sale 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. As of December 31, 2016, we had issued 0.9 million common shares under this program at a weighted average share price of $33.32 for net proceeds of $29.6 million.

During the second quarter of 2016, we issued approximately 5.3 million common shares, including 0.7 million shares issued pursuant to the underwriters' over-allotment option, at a price to the public of $28.20 per share. We received net proceeds of approximately $143.4 million.

We have a dividend reinvestment program, whereby shareholders may use their dividends and optional cash payments to purchase common shares. The common shares sold under this program may either be common shares issued by us or common shares purchased in the open market. As of December 31, 2016, we had issued approximately 23,000 common shares under this program at a weighted average share price of $30.98 for gross proceeds of $0.7 million.

Preferred Equity

Our board of trustees can, at its discretion, authorize the issuance of up to 10.0 million preferred shares. The ability to issue preferred equity provides Washington REIT an additional financing tool that may be used to raise capital for future acquisitions or other business purposes. As of December 31, 2016, no preferred shares had been authorized or issued.

Dividends

We currently declare dividends quarterly at a rate of $0.30 per share. The maintenance of our dividend level is subject to various factors reviewed by the board of trustees in its discretion. These factors include our results of operations, the availability of cash and the REIT distribution requirements, which require at least 90% of our REIT taxable income to be distributed to shareholders on an annual basis. When setting the dividend level, our board of trustees looks in particular at trends in our level of funds from operations, together with associated recurring capital improvements, tenant improvements, leasing commissions and incentives, and adjustments to straight-line rents to reflect cash rents received.

Our dividend and distribution payments for the three years ended December 31, 2016 were as follows (in thousands):

	Year Ended December 31,
	2016		2015		2014
Common dividends	$	85,648	$	61,510	$	80,277
Noncontrolling interest distributions	196		—		3,454
	$	85,844	$	61,510	$	83,731

Dividends paid during 2016 increased from 2015 primarily due to the payment on January 5, 2016 of the $20.4 million of dividends declared and accrued during the fourth quarter of 2015 and the issuance of approximately 6.2 million common shares during 2016.

Dividends paid during 2015 decreased from 2014 primarily due to the payment on January 5, 2016 of the $20.4 million of dividends declared and accrued during the fourth quarter of 2015.

The $3.5 million distribution to noncontrolling interests in 2014 is related to the disposition of 4661 Kenmore Avenue as part of the Medical Office Portfolio sale (see note 3 to the consolidated financial statements).

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Capital Commitments

We will require capital for development and redevelopment projects currently underway and in the future. We are currently engaged in predevelopment activities for the ground-up development of a multifamily property (The Trove) on land adjacent to The Wellington, the redevelopment of Spring Valley Retail Center to add rentable space and the redevelopment of the Army Navy Building to upgrade its common areas and add significant amenities in order to make the property more competitive within its sub-market. As of December 31, 2016, we had no outstanding contractual commitments related to our development and redevelopment projects, and expect to fund approximately $45.0 - $50.0 million of total development/redevelopment spending during 2017.

In addition to our development and redevelopment projects, we anticipate funding several major renovation projects in our portfolios during 2017, as follows (in thousands):

Office	$	4,700
Multifamily	8,700
Retail	600
Total	$	14,000

These projects include unit and common area renovations, facade restorations, adding amenities and fitness center upgrades at multifamily properties; facade and garage repairs, fitness center buildout, elevator modernizations and lobby upgrades at office properties; and elevator and HVAC replacements at retail properties. Not all of the anticipated spending had been committed via executed construction contracts at December 31, 2016. We expect to fund these projects using cash generated by our real estate operations, through borrowings on our Revolving Credit Facility, or raising additional debt or equity capital in the public market.

Contractual Obligations

As of December 31, 2016, certain contractual obligations will require significant capital as follows (in thousands):

	Payments due by Period
	Total		Less than 1 year		1-3 years		4-5 years		After 5 years
Long-term debt(1)	$	1,336,713	$	93,956	$	527,646	$	541,029	$	174,082
Purchase obligations(2)	9,385		3,363		6,022		—		—
Tenant-related capital(3)	29,316		23,747		5,569		—		—
Building capital(4)	4,205		4,205		—		—		—
Operating leases	14,077		340		802		520		12,415

⁽¹⁾  See notes 4, 5 and 6 of our consolidated financial statements. Amounts include principal, interest, unused commitment fees and facility fees.

⁽²⁾  Represents electricity purchase agreements with terms through 2018 and natural gas purchase agreements with terms through 2017.

⁽³⁾  Committed tenant-related capital based on executed leases as of December 31, 2016.

⁽⁴⁾  Committed building capital additions based on contracts in place as of December 31, 2016.

We have various standing or renewable contracts with vendors. The majority of these contracts can be canceled with immaterial or no cancellation penalties, with the exception of our elevator maintenance and electricity and natural gas purchase agreements, which are included above on the purchase obligations line. Contract terms on leases that can be canceled are generally one year or less. We are currently committed to fund tenant-related capital improvements as described in the table above for executed leases. However, expected leasing levels could require additional tenant-related capital improvements which are not currently committed. We expect that total tenant-related capital improvements, including those already committed, will be approximately $25 million in 2017.

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Historical Cash Flows

Cash flows from operations are an important factor in our ability to sustain our dividend at its current rate. If our cash flows from operations were to decline significantly, we may have to reduce our dividend. Consolidated cash flows for the three years ended December 31, 2016 were as follows (in thousands):

	Year ended December 31,									Variance
	2016			2015			2014			2016 vs. 2015			2015 vs. 2014
Cash provided by operating activities	$	116,931		$	109,426		$	83,117		$	7,505		$	26,309
Cash used in by investing activities	(58,632		)	(93,018		)	(107,882		)	34,386			14,864
Cash used in financing activities	(70,819		)	(8,410		)	(89,751		)	(62,409		)	81,341

The increase in cash provided by operating activities in 2016 was primarily due to income from acquisitions executed in 2015 and 2016 and lower interest payments in 2016, partially offset by dispositions in 2016. The increase in cash provided by operating activities in 2015 was primarily due to income from acquisitions executed in 2014 and 2015.

Net cash used in investing activities decreased in 2016 primarily due to a higher volume of disposition activity in 2016, partially offset by executing a larger acquisition during 2016. Net cash used in investing activities decreased in 2015 primarily due to lower spending on development and redevelopment projects.

Net cash used in financing activities increased in 2016 primarily due to higher debt repayments and dividends paid during 2016, partially offset by proceeds from equity issuances. Net cash used in financing activities decreased in 2015 primarily due to replacing the $150.0 million of unsecured notes repaid in 2015 with the $150.0 million term loan and the payment after year-end of the dividends declared and accrued in the fourth quarter of 2015.

Capital Improvements and Development Costs

Our capital improvement, development and redevelopment costs for the three years ended December 31, 2016 were as follows (in thousands):

	Year Ended December 31,
	2016		2015		2014
Accretive capital improvements and development costs:
Acquisition related	$	8,644	$	3,077	$	2,533
Expansions and major renovations	10,869		10,722		24,602
Development/redevelopment	22,572		31,203		43,264
Tenant improvements (including first generation leases)	29,657		21,208		22,096
Total accretive capital improvements (1)	71,742		66,210		92,495
Other capital improvements:	7,924		6,500		8,579
Total	$	79,666	$	72,710	$	101,074

⁽¹⁾ We consider these capital improvements to be accretive to revenue and not necessarily to net income.

Included in the capital improvement and development costs listed above are capitalized interest in the amount of $0.7 million, $0.7 million and $2.1 million for the three years ended December 31, 2016, respectively, and capitalized employee compensation in the amount of $1.6 million, $2.0 million and $2.0 million for the three years ended December 31, 2016, respectively.

Accretive Capital Improvements

Acquisition Related Improvements: Acquisition related improvements are capital improvements to properties acquired during the preceding three years which were anticipated at the time we acquired the properties. These types of improvements were made in 2016 to Riverside Apartments, The Wellington, 1775 Eye Street, NW and Spring Valley Shopping Center.

Expansions and Major Renovations: Expansion projects increase the rentable area of a property, while major renovation projects are improvements sufficient to increase the income otherwise achievable at a property. Expansions and major renovations during 2016 included unit renovations and facade restoration at The Ashby; unit renovations at 3801 Connecticut Avenue; HVAC,

45

restrooms and fitness center upgrades, conference center buildout and sitework at Silverline Center; HVAC replacement and fitness center upgrades at 1227 25th Street; garage repairs at 515 King Street and roof replacement at Montrose Shopping Center and Frederick County Square.

Development/Redevelopment: Development costs represent expenditures for ground up development of new operating properties. Redevelopment costs represent expenditures for improvements intended to reposition properties in their markets and increase income that would be otherwise achievable. Development/redevelopment costs in 2016 primarily include costs associated with the acquisition of a parcel of land for future development adjacent to Riverside Apartments, predevelopment costs for Trove, a multifamily development adjacent to The Wellington, and redevelopment costs at the Army Navy Building. Development/redevelopment costs in 2015 and 2014 primarily include costs associated with the ground up development of The Maxwell, redevelopment of the Silverline Center, and the acquisition of a parcel of land for Trove, a multifamily development adjacent to The Wellington. The Silverline Center redevelopment and The Maxwell have been completely placed into service as of March 31, 2016 and December 31, 2015, respectively.

Tenant Improvements: Tenant improvements are costs, such as space build-out, associated with commercial lease transactions. Our average tenant improvement costs per square foot of space leased, excluding first generation leases, during the three years ended December 31, 2016 were as follows:

	Year Ended December 31,
	2016		2015		2014
Office	$	28.96	$	30.37	$	27.71
Retail	$	5.53	$	15.36	$	5.87

The $2.66 increase in 2015 and subsequent $1.41 decrease in 2016 in tenant improvement costs per square foot of office space leased were primarily due to leases executed in 2015 requiring $12.5 million for tenant improvements at Silverline Center.

The $9.49 increase in 2015 and subsequent $9.83 decrease in 2016 in tenant improvement costs per square foot of retail space leased were primarily due to large tenant leases executed at Chevy Chase Metro and Bradlee Shopping Center in 2015.

Tenant improvement costs for retail tenants are substantially lower than for office tenants because the improvements required for retail tenants tend to be substantially less extensive than for office tenants.

Other Capital Improvements

Other capital improvements, also referred to as recurring capital improvements, are those not included in the above categories. Over time these costs will be recurring in nature to maintain a property's income and value. In our multifamily properties, these include new appliances, flooring, cabinets and bathroom fixtures. These improvements, which are made as needed upon vacancy of an apartment, totaled $1.9 million in 2016, averaging approximately $1,150 per apartment for the 37% of apartments turned over relative to our total portfolio of apartment units. In our commercial properties and multifamily properties (aside from improvements related to apartment turnover), improvements include facade repairs, installation of new heating and air conditioning equipment, asphalt replacement, permanent landscaping, new lighting and new finishes. In addition, we incurred repair and maintenance expense of $14.8 million during 2016 to maintain the quality of our buildings.

Off Balance Sheet Arrangements

We have no off-balance sheet arrangements as of December 31, 2016 that are reasonably likely to have a current or future material effect on our financial condition, revenues or expenses, results of operations, liquidity, capital expenditures or capital resources.

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Forward-Looking Statements

This Form 10-K contains forward-looking statements which involve risks and uncertainties. Such forward-looking statements include each of the statements in “Item 1: Business” and “Item 7: Management’s Discussion and Analysis of Financial Conditions and Results of Operations” concerning the Washington metro region’s economy, gross regional product, unemployment and job growth and real estate market performance. Such forward-looking statements also include the following statements with respect to Washington REIT:

(a) our intention to invest in properties that we believe will increase in income and value;

(b) our belief that external sources of capital will continue to be available and that additional sources of capital will be available from the sale of common shares or notes; and

(c) our belief that we have the liquidity and capital resources necessary to meet our known obligations and to make additional property acquisitions and capital improvements when appropriate to enhance long-term growth.

Forward-looking statements also include other statements in this report preceded by, followed by or that include the words “believe,” “expect,” “intend,” “anticipate,” “potential,” “project,” “will” and other similar expressions.

We claim the protection of the safe harbor for forward-looking statements contained in the Private Securities Litigation Reform Act of 1995 for the foregoing statements. The following important factors, in addition to those discussed elsewhere in this Form 10-K, could affect our future results and could cause those results to differ materially from those expressed in the forward-looking statements:

(a) the effect of credit and financial market conditions;

(b) the availability and cost of capital;

(c) fluctuations in interest rates;

(d) the economic health of our tenants;

(e) the timing and pricing of lease transactions;

(f) the economic health of the greater Washington Metro region, or other markets we may enter;

(g) the risks associated with ownership of real estate in general and our real estate assets in particular;

(h) the effects of changes in federal government spending;

(i) the supply of competing properties;

(j) ability to maintain an effective system of internal controls;

(k) compliance with applicable laws, including those concerning the environment and access by persons with disabilities;

(l) governmental or regulatory actions and initiatives;

(m) terrorist attacks or actions;

(n) weather conditions and natural disasters;

(o) failure to qualify as a REIT;

(p) the availability of and our ability to attract and retain qualified personnel;

(q) uncertainty in our ability to continue to pay dividends at the current rates; and

(r) other factors discussed under the caption “Risk Factors.”

We undertake no obligation to update our forward-looking statements or risk factors to reflect new information, future events, or otherwise.

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Funds From Operations

NAREIT FFO is a widely used measure of operating performance for real estate companies. We provide NAREIT FFO as a supplemental measure to net income calculated in accordance with GAAP. Although NAREIT FFO is a widely used measure of operating performance for REITs, NAREIT FFO does not represent net income calculated in accordance with GAAP. As such, it should not be considered an alternative to net income as an indication of our operating performance. In addition, NAREIT FFO does not represent cash generated from operating activities in accordance with GAAP, nor does it represent cash available to pay distributions and should not be considered as an alternative to cash flow from operating activities, determined in accordance with GAAP, as a measure of our liquidity. In its April, 2002 White Paper, the National Association of Real Estate Investment Trusts, Inc. (“NAREIT”) defines NAREIT FFO as net income (computed in accordance with GAAP) excluding gains (or losses) associated with sales of properties; impairments of depreciable real estate, and real estate depreciation and amortization. We consider NAREIT FFO to be a standard supplemental measure for REITs because it facilitates an understanding of the operating performance of our properties without giving effect to real estate depreciation and amortization, which historically assumes that the value of real estate assets diminishes predictably over time. Since real estate values have instead historically risen or fallen with market conditions, we believe that NAREIT FFO more accurately provides investors an indication of our ability to incur and service debt, make capital expenditures and fund other needs. Our NAREIT FFO may not be comparable to FFO reported by other REITs. These other REITs may not define the term in accordance with the current NAREIT definition or may interpret the current NAREIT definition differently.

The following table provides the calculation of our NAREIT FFO and a reconciliation of NAREIT FFO to net income for the three years ended December 31, 2016 (in thousands):

	Year Ended December 31,
	2016			2015			2014
Net income	$	119,288		$	89,187		$	111,601
Adjustments:
Depreciation and amortization	108,406			108,935			96,011
Gain on sale of depreciable real estate	(101,704		)	(89,653		)	(106,555		)
Income from operations of properties classified as discontinued operations	—			—			(546		)
Funds from continuing operations	125,990			108,469			100,511
Discontinued operations:
Income from operations of properties classified as discontinued operations	—			—			546
Funds from discontinued operations	—			—			546
NAREIT FFO	$	125,990		$	108,469		$	101,057

Critical Accounting Policies and Estimates

We base the discussion and analysis of our financial condition and results of operations upon our consolidated financial statements, which have been prepared in accordance with GAAP. The preparation of these financial statements requires us to make estimates and judgments that affect the reported amounts of assets, liabilities, revenues and expenses. We evaluate these estimates on an on-going basis, including those related to estimated useful lives of real estate assets, estimated fair value of acquired leases, cost reimbursement income, bad debts, contingencies and litigation. We base the estimates on historical experience and on various other assumptions that we believe to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities that are not readily apparent from other sources. We cannot assure you that actual results will not differ from those estimates.

We believe the following accounting estimates are the most critical to aid in fully understanding our reported financial results, and they require our most difficult, subjective or complex judgments, resulting from the need to make estimates about the effect of matters that are inherently uncertain.

Accounting for Real Estate Acquisitions

We record acquired or assumed assets, including physical assets and in-place leases, and liabilities, based on their fair values. We

48

determine the estimated fair values of the assets and liabilities in accordance with current GAAP fair value provisions. We determine the fair values of acquired buildings on an “as-if-vacant” basis considering a variety of factors, including the replacement cost of the property, estimated rental and absorption rates, estimated future cash flows and valuation assumptions consistent with current market conditions. We determine the fair value of land acquired based on comparisons to similar properties that have been recently marketed for sale or sold.

The fair value of in-place leases consists of the following components: (a) the estimated cost to us to replace the leases, including foregone rents during the period of finding a new tenant and foregone recovery of tenant pass-throughs (referred to as “absorption cost”); (b) the estimated cost of tenant improvements, and other direct costs associated with obtaining a new tenant (referred to as “tenant origination cost”); (c) estimated leasing commissions associated with obtaining a new tenant (referred to as “leasing commissions”); (d) the above/at/below market cash flow of the leases, determined by comparing the projected cash flows of the leases in place, including consideration of renewal options, to projected cash flows of comparable market-rate leases (referred to as “net lease intangible”); and (e) the value, if any, of customer relationships, determined based on our evaluation of the specific characteristics of each tenant’s lease and our overall relationship with the tenant (referred to as “customer relationship value”).

We discount the amounts used to calculate net lease intangibles using an interest rate which reflects the risks associated with the leases acquired. We include tenant origination costs in income producing property on our balance sheet and amortize the tenant origination costs as depreciation expense on a straight-line basis over the useful life of the asset, which is typically the remaining life of the underlying leases. We classify leasing commissions and absorption costs as other assets and amortize leasing commissions and absorption costs as amortization expense on a straight-line basis over the remaining life of the underlying leases. We classify above market net lease intangible assets as other assets and amortize them on a straight-line basis as a decrease to real estate rental revenue over the remaining term of the underlying leases. We classify below market net lease intangible liabilities as other liabilities and amortize them on a straight-line basis as an increase to real estate rental revenue over the remaining term of the underlying leases. If any of the fair value of below market lease intangibles includes fair value associated with a renewal option, such amounts are not amortized until the renewal option is executed, else the related value is expensed at that time. Should a tenant terminate its lease, we accelerate the amortization of the unamortized portion of the tenant origination cost (if it has no future value), leasing commissions, absorption costs and net lease intangible associated with that lease over its new shorter term.

Allowance for Doubtful Accounts

We recognize rental income and rental abatements from our multifamily and commercial leases when earned on a straight-line basis over the lease term. We record a provision for losses on accounts receivable equal to the estimated uncollectible amounts. We base this estimate on our historical experience and a monthly review of the current status of our receivables. We consider factors such as the age of the receivable, the payment history of our tenants and our assessment of our tenants’ ability to perform under their lease obligations, among other things. In addition to rents due currently, accounts receivable include amounts representing minimum rental income accrued on a straight-line basis to be paid by tenants over the remaining term of their respective leases. Our estimate of uncollectible accounts is subject to revision as these factors change and is sensitive to the impact of economic and market conditions on tenants.

Capitalized Interest

We capitalize interest costs incurred on borrowing obligations while qualifying assets are being readied for their intended use. We amortize capitalized interest over the useful life of the related underlying assets upon those assets being placed into service.

Real Estate Impairment

We recognize impairment losses on long-lived assets used in operations, development assets or land held for future development, if indicators of impairment are present and the net undiscounted cash flows estimated to be generated by those assets are less than the assets' carrying amount and estimated undiscounted cash flows associated with future development expenditures. If such carrying amount is in excess of the estimated cash flows from the operation and disposal of the property, we would recognize an impairment loss equivalent to an amount required to adjust the carrying amount to the estimated fair value. Assets held for sale are recorded at the lower of cost or fair value less costs to sell.

Stock Based Compensation

We recognize compensation expense for service-based share awards ratably over the period from the service inception date through the vesting period based on the fair market value of the shares on the date of grant. We initially measure compensation expense for awards with performance conditions at fair value at the service inception date based on probability of payout, and we remeasure compensation expense at subsequent reporting dates until all of the award’s key terms and conditions are known and the grant date is established. We amortize awards with performance conditions using the graded expense method. We measure compensation

49

expense for awards with market conditions based on the grant date fair value, as determined using a Monte Carlo simulation, and we amortize the expense ratably over the requisite service period, regardless of whether the market conditions are achieved and the awards ultimately vest. Compensation expense for the trustee grants, which fully vest immediately, is fully recognized upon issuance based upon the fair market value of the shares on the date of grant.

Federal Income Taxes

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 TRSs. Our TRSs are subject to corporate federal and state income tax on their taxable income at regular statutory rates. During the second quarter of 2016, we recognized an income tax benefit of $0.7 million from a reduction of the reserve for a deferred tax asset at one of our taxable REIT subsidiaries. As of December 31, 2016, our TRSs had net deferred tax assets of $0.5 million. Our TRSs had no net deferred tax assets as of December 31, 2015.

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ITEM 7A: QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

The principal material financial market risk to which we are exposed is interest rate risk. Our exposure to interest rate risk relates primarily to refinancing long-term fixed rate obligations, the opportunity cost of fixed rate obligations in a falling interest rate environment and our variable rate line of credit. We primarily enter into debt obligations to support general corporate purposes, including acquisition of real estate properties, capital improvements and working capital needs. We use interest rate swap arrangements to reduce our exposure to the variability in future cash flows attributable to changes in interest rates.

The table below presents principal, interest and related weighted average fair value interest rates by year of maturity, with respect to debt outstanding on December 31, 2016.

	2017			2018			2019			2020			2021			Thereafter			Total			Fair Value
(In thousands)
Unsecured fixed rate debt (1)
Principal	$	—		$	—		$	—		$	250,000		$	150,000		$	450,000		$	850,000		$	873,516
Interest payments	$	36,224		$	36,224		$	36,224		$	36,224		$	20,786		$	42,204		$	207,886
Interest rate on debt maturities	—		%	—		%	—		%	5.1		%	2.7		%	4.0		%	4.1		%
Unsecured variable rate debt
Principal	$	—		$	—		$	120,000		$	—		$	—		$	—		$	120,000		$	120,000
Variable interest rate on debt maturities	—		%	—		%	1.6		%	—		%	—		%	—		%	1.6		%
Mortgages
Principal amortization (2) (30 year schedule)	$	52,571		$	3,135		$	33,909		$	2,659		$	2,829		$	49,382		$	144,485		$	149,997
Interest payments	$	5,557		$	5,089		$	3,627		$	3,046		$	2,876		$	727		$	20,922
Weighted average interest rate on principal amortization	3.3		%	4.9		%	5.3		%	4.7		%	4.7		%	3.9		%	4.0		%

⁽¹⁾ Includes $150.0 million term loan and $100.0 million term loan with floating interest rates. The $150.0 million term loan is effectively fixed by interest rate swap arrangements at 2.7%, and the $100.0 million term loan will be effectively fixed by forward interest rate swap arrangements at 2.9% starting on March 31, 2017.

⁽²⁾ Excludes net discounts of $4.4 million and net unamortized debt issuance costs of $0.3 million as of December 31, 2016.

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 our new $150.0 million term loan to an all-in fixed interest rate of 2.7% starting on October 15, 2015 and extending until the maturity of the 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(see note 7 to the consolidated financial statements).

We entered into the interest rate swap arrangements designated and qualifying as cash flow hedges to reduce our exposure to the variability in future cash flows attributable to changes in interest rates. 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. As part of our ongoing control procedures, we monitor the credit ratings of counterparties and our exposure to any single entity, thus minimizing our credit risk concentration.

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The following table sets forth information pertaining to interest rate swap contracts in place as of December 31, 2016 and 2015 and their respective fair values (dollars in thousands):

Notional Amount			Floating Index Rate			Fair Value as of:
		Fixed Rate		Effective Date	Expiration Date	December 31, 2016		December 31, 2015
$	75,000	1.619%	One-Month LIBOR	10/15/2015	3/15/2021	$	224	$	(259	)
75,000		1.626%	One-Month LIBOR	10/15/2015	3/15/2021	193		(291		)
100,000		1.205%	One-Month LIBOR	3/31/2017	7/21/2023	4,775		N/A
50,000		1.208%	One-Month LIBOR	3/31/2017	7/21/2023	2,419		N/A
$	300,000					$	7,611	$	(550	)

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ITEM 8:  FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA

The financial statements and supplementary data appearing on pages 62 to 98 are incorporated herein by reference.

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

None.

ITEM 9A:  CONTROLS AND PROCEDURES

We maintain disclosure controls and procedures that are designed to ensure that information required to be disclosed in our Securities Exchange Act reports is recorded, processed, summarized and reported within the time periods specified in the SEC’s rules and forms, and that such information is accumulated and communicated to our management, including our Chief Executive Officer, Chief Financial Officer and Chief Accounting Officer and Controller, as appropriate, to allow timely decisions regarding required disclosure. In designing and evaluating the disclosure controls and procedures, management recognized that any controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving the desired control objectives, and management necessarily was required to apply its judgment in evaluating the cost-benefit relationship of possible controls and procedures.

We carried out an evaluation, under the supervision and with the participation of our management, including our Chief Executive Officer, Chief Financial Officer and Chief Accounting Officer and Controller, of the effectiveness of the design and operation of our disclosure controls and procedures as of December 31, 2016. Based on the foregoing, our Chief Executive Officer, Chief Financial Officer and Chief Accounting Officer and Controller concluded that our disclosure controls and procedures were effective at a reasonable assurance level.

Internal Control over Financial Reporting

See the Report of Management in Item 8 of this Form 10-K.

See the Reports of Independent Registered Public Accounting Firm in Item 8 of this Form 10-K.

During the three months ended December 31, 2016, there was no change in our internal control over financial reporting that has materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.

ITEM 9B:  OTHER INFORMATION

None.

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PART III

Certain information required by Part III is omitted from this Form 10-K in that we will file a definitive proxy statement pursuant to Regulation 14A with respect to our 2017 Annual Meeting (the “Proxy Statement”) no later than 120 days after the end of the fiscal year covered by this Form 10-K, and certain information included therein is incorporated herein by reference. Only those sections of the Proxy Statement which specifically address the items set forth herein are incorporated by reference. In addition, we have adopted a code of ethics which can be reviewed and printed from our website www.washreit.com.

ITEM 10:  DIRECTORS, EXECUTIVE OFFICERS AND CORPORATE GOVERNANCE

The information required by this Item is hereby incorporated herein by reference to the Proxy Statement.

ITEM 11:  EXECUTIVE COMPENSATION

The information required by this Item is hereby incorporated herein by reference to the Proxy Statement.

ITEM 12:  SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT AND RELATED STOCKHOLDER MATTERS

The information required under this Item by Item 403 of Regulation S-K is hereby incorporated herein by reference to the Proxy Statement.

Equity Compensation Plan Information

Plan Category	Number of securities to be issued upon exercise of outstanding options,  warrants and rights	Weighted-average exercise price of outstanding options, warrants and rights		Number of securities  remaining available for future issuance under equity compensation plans (excluding securities reflected in column (a))
	(a)	(b)		(c)
Equity compensation plans approved by security holders (1)	—	$	—	2,385,366
Equity compensation plans not approved by security holders	—	$	—	—
Total	—	$	—	2,385,366

⁽¹⁾ See note 9 to the consolidated financial statements for discussion of the equity compensation plans.

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

The information required by this Item is hereby incorporated herein by reference to the Proxy Statement.

ITEM 14:  PRINCIPAL ACCOUNTANT FEES AND SERVICES

The information required by this Item is hereby incorporated herein by reference to the Proxy Statement.

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PART IV

ITEM 15:  EXHIBITS AND FINANCIAL STATEMENT SCHEDULES

(A). The following documents are filed as part of this Form 10-K:

1.	Financial Statements	Page
	Management's Report on Internal Control Over Financial Reporting	59
	Report of Independent Registered Public Accounting Firm	60
	Report of Independent Registered Public Accounting Firm on Internal Control Over Financial Reporting	61
	Consolidated Balance Sheets as of December 31, 2016 and 2015	62
	Consolidated Statements of Income for the Years Ended December 31, 2016, 2015 and 2014	63
	Consolidated Statements of Comprehensive Income for the Years Ended December 31, 2016, 2015 and 2014	64
	Consolidated Statements of Equity for the Years Ended December 31, 2016, 2015 and 2014	65
	Consolidated Statements of Cash Flows for the Years Ended December 31, 2016, 2015 and 2014	66
	Notes to Consolidated Financial Statements	67
2.	Financial Statement Schedules
	Schedule II – Valuation and Qualifying Accounts	95
	Schedule III – Consolidated Real Estate and Accumulated Depreciation	96
	All other schedules are omitted because they are either not required or the required information is shown in the financial statements or notes thereto.
3.	Exhibits:

		Incorporated by Reference
Exhibit Number	Exhibit Description	Form	File Number	Exhibit	Filing Date	Filed Herewith
3.1	Articles of Amendment and Restatement, effective as of May 17, 2011	DEF 14A	001-06622	B	4/1/2011
3.2	Amended and Restated Bylaws of Washington Real Estate Investment Trust, as adopted on May 17, 2011	8-K	001-06622	3.3	5/23/2011
3.3	Amended and Restated Bylaws of Washington Real Estate Investment Trust, as adopted on February 8, 2017	8-K	001-06622	3.1	2/14/2017
4.1	Form of 2028 Notes	8-K	001-06622	99.1	2/25/1998
4.2	Supplemental Indenture by and between Washington REIT and the Bank of New York Trust Company, N.A. dated as of July 3, 2007	8-K	001-06622	4.1	7/5/2007
4.3	Form of 4.95% Senior Notes due October 1, 2020	8-K	001-06622	4.1	9/30/2010
4.4	Officers’ Certificate establishing the terms of the 4.95% Senior Notes due October 1, 2020	8-K	001-06622	4.2	9/30/2010
4.5	Form of 3.95% Senior Notes due October 15, 2022	8-K	001-06622	4.1	9/17/2012
4.6	Officers' Certificate establishing the terms of 3.95% Notes due October 15, 2022	8-K	001-06622	4.2	9/17/2012
10.1*	Share Purchase Plan	10-Q	001-06622	10(j)	11/14/2002
10.2*	Supplemental Executive Retirement Plan	10-Q	001-06622	10(k)	11/14/2002
10.3*	Supplemental Executive Retirement Plan	10-K	001-06622	10(p)	3/16/2006
10.4*	2007 Omnibus Long Term Incentive Plan	DEF 14A	001-06622	B	4/9/2007
10.5*	Deferred Compensation Plan for Officers dated January 1, 2007	10-K	001-06622	10(gg)	2/29/2008
10.6*	Supplemental Executive Retirement Plan II dated May 23, 2007	10-K	001-06622	10(hh)	2/29/2008
10.7*	Form of Indemnification Agreement by and between Washington REIT and the indemnitee	8-K	001-06622	10(nn)	7/27/2009
10.8*	Executive Stock Ownership Policy, adopted October 27, 2010	8-K	001-06622	10.31	11/2/2010
10.9*	Amendment to Deferred Compensation Plan for Officers, adopted October 27, 2010	8-K	001-06622	10.32	11/2/2010
10.10*	Long Term Incentive Plan, effective January 1, 2011	10-Q	001-06622	10.34	5/6/2011
10.11*	Short Term Incentive Plan, effective January 1, 2011	10-Q	001-06622	10.35	5/6/2011

55

		Incorporated by Reference
Exhibit Number	Exhibit Description	Form	File Number	Exhibit	Filing Date	Filed Herewith
10.12*	Short Term Incentive Plan, effective January 1, 2012	10-Q	001-06622	10.38	5/7/2012
10.13*	Amendment to Deferred Compensation Plan for Officers, adopted December 31, 2012	10-K	001-06622	10.37	2/27/2013
10.14*	Amended and restated change in control agreement dated February 25, 2013 with Thomas C. Morey	10-K	001-06622	10.41	2/27/2013
10.15*	Amendment to Deferred Compensation Plan for Officers, adopted February 13, 2013	10-Q	001-06622	10.45	5/9/2013
10.16*	Amendment to Deferred Compensation Plan for Directors, adopted February 13, 2013	10-Q	001-06622	10.46	5/9/2013
10.17*	Amendment to Short Term Incentive Plan, adopted as of January 22, 2013	10-Q	001-06622	10.47	5/9/2013
10.18	Purchase and Sale Agreement, dated as of September 27, 2013, for Woodburn Medical Park I and II	8-K	001-06622	10.51	10/3/2013
10.19	Purchase and Sale Agreement, dated as of September 27, 2013, for Prosperity Medical Center I, II and III	8-K	001-06622	10.52	10/3/2013
10.20	Amended and Restated Deferred Compensation Plan for Directors, effective October 22, 2013	10-Q	001-06622	10.53	11/1/2013
10.21*	Employment Agreement dated August 19, 2013 with Paul T. McDermott	10-Q	001-06622	10.54	11/1/2013
10.22*	Change in control agreement dated October 1, 2013 with Paul T. McDermott	10-K	001-06622	10.44	3/3/2014
10.23*	Amendment to Deferred Compensation Plan for Officers, adopted February 18, 2014	10-K	001-06622	10.45	3/3/2014
10.24*	Amendment to Deferred Compensation Plan for Directors as Amended and Restated, adopted February 18, 2014	10-K	001-06622	10.46	3/3/2014
10.25*	Short Term Incentive Compensation Plan (effective January 1, 2014)	10-Q	001-06622	10.47	5/7/2014
10.26*	Change in control agreement dated April 21, 2014 with Thomas Q. Bakke	10-Q	001-06622	10.48	5/7/2014
10.27*	Long Term Incentive Plan (effective January 1, 2014)	10-Q	001-06622	10.50	8/5/2014
10.28*	Amendment to Short Term Incentive Plan (effective January 1, 2014)	10-Q	001-06622	10.51	8/5/2014
10.29*	Executive Officer Severance Pay Plan, adopted August 4, 2014	10-Q	001-06622	10.54	10/30/2014
10.30*	Separation Agreement and General Release between William T. Camp and Washington Real Estate Investment Trust dated December 17, 2014	8-K	001-06622	10.1	12/18/2014
10.31*	Separation Agreement and General Release between Laura M. Franklin and Washington Real Estate Investment Trust dated February 18, 2015	8-K	001-06622	10.1	2/19/2015
10.32*	Change in control agreement dated April 1, 2013 with Edward J. Murn IV	10-K	001-06622	10.52	3/2/2015
10.33*	Offer Letter to Thomas Q. Bakke	10-K	001-06622	10.53	3/2/2015
10.34*	Description of Washington REIT Trustee Compensation Plan, effective January 1, 2015	10-K	001-06622	10.54	3/2/2015
10.35*	Offer Letter to Stephen E. Riffee	10-K	001-06622	10.55	3/2/2015
10.36*	Change in control agreement dated February 27, 2015 with Stephen E. Riffee	10-K	001-06622	10.56	3/2/2015
10.37*	Revised Description of Washington REIT Trustee Compensation Plan, effective January 1, 2015	10-Q	001-06622	10.57	5/5/2015
10.38*	Statement of Amendment of STIP and LTIP for S. Riffee	10-Q	001-06622	10.58	5/5/2015
10.39	Credit Agreement, dated as of June 23, 2015, by and among Washington REIT, as borrower, the financial institutions party thereto as lenders, and Wells Fargo Bank, National Association, as administrative agent, with Wells Fargo Securities, LLC, and KeyBanc Capital Markets Inc., as joint lead arrangers and joint bookrunners, KeyBank National Association, as syndication agent, and Royal Bank of Canada and SunTrust Bank, as documentation agents	8-K	001-06622	10.1	6/23/2015
10.40*	Amendment to Long Term Incentive Plan	10-Q	001-06622	10.60	11/4/2015
10.41*	Amended and restated Trustee Deferred Compensation Plan	10-Q	001-06622	10.61	11/4/2015
10.42	First Amendment to Credit Agreement, dated as of September 15, 2015, by and among the Company, as borrower, the financial institutions party thereto as lenders, and Wells Fargo, National Association.	8-K	001-06622	10.1	9/16/2015
10.43	Purchase and Sale Agreement, dated April 26, 2016, for Riverside Apartments	10-Q	001-06622	10.49	8/1/2016
10.44	Purchase and Sale Agreement, dated April 26, 2016, for Wayne Plaza, West Gude Drive, 600 Jefferson Plaza and 6110 Executive Boulevard	10-Q	001-06622	10.50	8/1/2016
10.45	Purchase and Sale Agreement, dated April 26, 2016, for 51 Monroe Street and One Central Plaza	10-Q	001-06622	10.51	8/1/2016
10.46	First Amendment to Purchase and Sale Agreement, dated June 3, 2016, for Wayne Plaza, West Gude Drive, 600 Jefferson Plaza and 6110 Executive Boulevard	10-Q	001-06622	10.52	8/1/2016
10.47*	2016 Omnibus Incentive Plan	DEF 14A		Annex A	3/23/2016

56

		Incorporated by Reference
Exhibit Number	Exhibit Description	Form	File Number	Exhibit	Filing Date	Filed Herewith
10.48	Term Loan Agreement, dated as of July 22, 2016, by and among Washington Real Estate Investment Trust, as borrower, the financial institutions party thereto as lenders, and Capital One, National Association, as administrative agent, with Capital One, National Association, and U.S. Bank National Association as joint lead arrangers and joint bookrunners, and U.S. Bank National Association as syndication agent	10-Q	001-06622	10.54	11/2/2016
10.49*	Separation Agreement and General Release between Thomas C. Morey and Washington Real Estate Investment Trust, dated July 26, 2016	10-Q	001-06622	10.55	11/2/2016
12	Computation of Ratio of Earnings to Fixed Charges					X
21	Subsidiaries of Registrant					X
23	Consent of Independent Registered Public Accounting Firm					X
24	Power of Attorney					X
31.1	Certification of the Chief Executive Officer pursuant to Rule 13a-14(a) of the Securities Exchange Act of 1934, as amended (“the Exchange Act”)					X
31.2	Certification of the Chief Financial Officer pursuant to Rule 13a-14(a) of the Exchange Act					X
31.3	Certification of the Chief Accounting Officer pursuant to Rule 13a-14(a) of the Exchange Act					X
32	Certification of the Chief Executive Officer, Chief Financial Officer and Chief Accounting Officer pursuant to Rule 13a-14(b) of the Exchange Act and 18U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002					X
101	The following materials from our Annual Report on Form 10-K for the year ended December 31, 2016 formatted in eXtensible Business Reporting Language ("XBRL"): (i) the Consolidated Balance Sheets, (ii) the Consolidated Statements of Income, (iii) the Consolidated Statements of Comprehensive Income, (iv) the Consolidated Statements of Equity, (v) the Consolidated Statements of Cash Flows, and (vi) notes to these consolidated financial statements.					X

* Management contracts or compensation plans or arrangements in which trustees or executive officers are eligible to participate.

In accordance with Item 601(b)(4)(iii)(A) of Regulation S-K, copies of certain instruments defining the rights of holders of long-term debt of Washington REIT or its subsidiaries are not filed herewith. Pursuant to this regulation, we hereby agree to furnish a copy of any such instrument to the SEC upon request.

ITEM 16:  FORM 10-K SUMMARY

We have chosen not to include a Form 10-K Summary.

57

SIGNATURES

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

WASHINGTON REAL ESTATE INVESTMENT TRUST

Date: February 21, 2017

By:    /s/ Paul T. McDermott

Paul T. McDermott

President and Chief Executive Officer

Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated.

Signature	Title	Date
/s/ Charles T. Nason*	Chairman, Trustee	February 21, 2017
Charles T. Nason
/s/ Paul T. McDermott	President, Chief Executive Officer and Trustee	February 21, 2017
Paul T. McDermott
/s/ Benjamin S. Butcher*	Trustee	February 21, 2017
Benjamin S. Butcher
/s/ William G. Byrnes*	Trustee	February 21, 2017
William G. Byrnes
/s/ Edward S. Civera*	Trustee	February 21, 2017
Edward S. Civera
/s/ Thomas H. Nolan, Jr.*	Trustee	February 21, 2017
Thomas H. Nolan, Jr.
/s/ Anthony L. Winns*	Trustee	February 21, 2017
Anthony L. Winns
/s/ Stephen E. Riffee	Executive Vice President and	February 21, 2017
Stephen E . Riffee	Chief Financial Officer
	(Principal Financial Officer)
/s/ W. Drew Hammond	Vice President, Chief Accounting Officer and	February 21, 2017
W. Drew Hammond	Controller
	(Principal Accounting Officer)

* By: /s/ W. Drew Hammond through power of attorney

W. Drew Hammond

58

MANAGEMENT’S REPORT ON

INTERNAL CONTROL OVER FINANCIAL REPORTING

Management of Washington Real Estate Investment Trust (“Washington REIT”) is responsible for establishing and maintaining adequate internal control over financial reporting and for the assessment of the effectiveness of internal controls over financial reporting. Washington REIT’s internal control system over financial reporting is a process designed under the supervision of Washington REIT’s principal executive and principal financial officers to provide reasonable assurance regarding the reliability of financial reporting and the preparation of the consolidated financial statements in accordance with U.S. generally accepted accounting principles.

All internal control systems, no matter how well designed, have inherent limitations. Therefore, even those systems determined to be effective can provide only reasonable assurance with respect to financial statement preparation and presentation. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions.

In connection with the preparation of Washington REIT’s annual consolidated financial statements, management has undertaken an assessment of the effectiveness of Washington REIT’s internal control over financial reporting as of December 31, 2016, based on criteria established in Internal Control-Integrated Framework issued in 2013 by the Committee of Sponsoring Organizations of the Treadway Commission (the 2013 COSO Framework). Management’s assessment included an evaluation of the design of Washington REIT’s internal control over financial reporting and testing of the operational effectiveness of those controls.

Based on this assessment, management has concluded that as of December 31, 2016, Washington REIT’s internal control over financial reporting was effective at a reasonable assurance level regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with U.S. generally accepted accounting principles.

Ernst & Young LLP, the independent registered public accounting firm that audited Washington REIT’s consolidated financial statements included in this report, has issued an unqualified opinion on the effectiveness of Washington REIT’s internal control over financial reporting, a copy of which appears on page 61 of this annual report.

59

Report of Independent Registered Public Accounting Firm

The Board of Trustees and Shareholders of

Washington Real Estate Investment Trust

We have audited the accompanying consolidated balance sheets of Washington Real Estate Investment Trust and Subsidiaries as of December 31, 2016 and 2015, and the related consolidated statements of income, comprehensive income, equity, and cash flows for each of the three years in the period ended December 31, 2016. Our audits also included the financial statement schedules listed in the Index at Item 15(A). These financial statements and schedules are the responsibility of the Company's management.  Our responsibility is to express an opinion on these financial statements and schedules based on our audits.

We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement. An audit includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements. An audit also includes assessing the accounting principles used and significant estimates made by management, as well as evaluating the overall financial statement presentation. We believe that our audits provide a reasonable basis for our opinion.

In our opinion, the financial statements referred to above present fairly, in all material respects, the consolidated financial position of Washington Real Estate Investment Trust and Subsidiaries at December 31, 2016 and 2015, and the consolidated results of their operations and their cash flows for each of the three years in the period ended December 31, 2016, in conformity with U.S. generally accepted accounting principles. Also, in our opinion, the related financial statement schedules, when considered in relation to the basic financial statements taken as a whole, present fairly in all material respects the information set forth therein.

As discussed in Note 2 to the consolidated financial statements, the Company changed its method for reporting discontinued operations effective January 1, 2014.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States), Washington Real Estate Investment Trust and Subsidiaries' internal control over financial reporting as of December 31, 2016, based on criteria established in Internal Control-Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (2013 Framework) and our report dated February 21, 2017 expressed an unqualified opinion thereon.

/s/ Ernst & Young LLP

McLean, Virginia

February 21, 2017

60

Report of Independent Registered Public Accounting Firm

The Board of Trustees and Shareholders of

Washington Real Estate Investment Trust

We have audited Washington Real Estate Investment Trust and Subsidiaries' internal control over financial reporting as of December 31, 2016, based on criteria established in Internal Control-Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (2013 Framework) (the COSO criteria). Washington Real Estate Investment Trust's management is responsible for maintaining effective internal control over financial reporting, and for its assessment of the effectiveness of internal control over financial reporting included in the accompanying Management's Report on Internal Control over Financial Reporting. Our responsibility is to express an opinion on the company's internal control over financial reporting based on our audit.

We conducted our audit in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether effective internal control over financial reporting was maintained in all material respects. Our audit included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, testing and evaluating the design and operating effectiveness of internal control based on the assessed risk, and performing such other procedures as we considered necessary in the circumstances. We believe that our audit provides a reasonable basis for our opinion.

A company's internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company's internal control over financial reporting includes those policies and procedures that (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company's assets that could have a material effect on the financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

In our opinion, Washington Real Estate Investment Trust and Subsidiaries maintained, in all material respects, effective internal control over financial reporting as of December 31, 2016, based on the COSO criteria.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States), the consolidated balance sheets of Washington Real Estate Investment Trust and Subsidiaries as of December 31, 2016 and 2015, and the related consolidated statements of income, comprehensive income, equity, and cash flows for each of the three years in the period ended December 31, 2016 of Washington Real Estate Investment Trust and Subsidiaries and our report dated February 21, 2017 expressed an unqualified opinion thereon.

/s/ Ernst & Young LLP

McLean, Virginia

February 21, 2017

61

WASHINGTON REAL ESTATE INVESTMENT TRUST AND SUBSIDIARIES

CONSOLIDATED BALANCE SHEETS

(IN THOUSANDS, EXCEPT PER SHARE DATA)

	December 31,
	2016			2015
Assets
Land	$	573,315		$	561,256
Income producing property	2,112,088			2,076,541
	2,685,403			2,637,797
Accumulated depreciation and amortization	(657,425		)	(692,608		)
Net income producing property	2,027,978			1,945,189
Properties under development or held for future development	40,232			36,094
Total real estate held for investment, net	2,068,210			1,981,283
Cash and cash equivalents	11,305			23,825
Restricted cash	6,317			13,383
Rents and other receivables, net of allowance for doubtful accounts of $2,377 and $2,297, respectively	64,319			62,890
Prepaid expenses and other assets	103,468			109,787
Total assets	$	2,253,619		$	2,191,168
Liabilities
Notes payable, net	$	843,084		$	743,181
Mortgage notes payable, net	148,540			418,052
Lines of credit	120,000			105,000
Accounts payable and other liabilities	46,967			45,367
Dividend payable	22,414			20,434
Advance rents	11,750			12,744
Tenant security deposits	8,802			9,378
Total liabilities	1,201,557			1,354,156
Equity
Shareholders’ equity
Preferred shares; $0.01 par value; 10,000 shares authorized; no shares issued or outstanding	—			—
Shares of beneficial interest; $0.01 par value; 100,000 shares authorized: 74,606 and 68,191 shares issued and outstanding at December 31, 2016 and 2015, respectively	746			682
Additional paid in capital	1,368,636			1,193,298
Distributions in excess of net income	(326,047		)	(357,781		)
Accumulated other comprehensive income (loss)	7,611			(550		)
Total shareholders’ equity	1,050,946			835,649
Noncontrolling interests in subsidiary	1,116			1,363
Total equity	1,052,062			837,012
Total liabilities and equity	$	2,253,619		$	2,191,168

See accompanying notes to the consolidated financial statements.

62

WASHINGTON REAL ESTATE INVESTMENT TRUST AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF INCOME

(IN THOUSANDS, EXCEPT PER SHARE DATA)

	Year Ended December 31,
	2016			2015			2014
Revenue
Real estate rental revenue	$	313,264		$	306,427		$	288,637
Expenses
Real estate expenses	115,013			112,234			103,695
Depreciation and amortization	108,406			108,935			96,011
Acquisition costs	1,178			2,056			5,710
Casualty (gain) and real estate impairment loss, net	(676		)	5,909			—
General and administrative	19,545			20,123			19,644
	243,466			249,257			225,060
Other operating income
Gain on sale of real estate, continuing operations	101,704			91,107			570
Real estate operating income	171,502			148,277			64,147
Other income (expense)
Interest expense	(53,126		)	(59,546		)	(59,785		)
Other income	297			709			825
Loss on extinguishment of debt	—			(119		)	—
Income tax benefit (expense)	615			(134		)	(117		)
	(52,214		)	(59,090		)	(59,077		)
Income from continuing operations	119,288			89,187			5,070
Discontinued operations:
Income from operations of properties sold or held for sale	—			—			546
Gain on sale of real estate, discontinued operations	—			—			105,985
Net income	119,288			89,187			111,601
Less: Net loss attributable to noncontrolling interests in subsidiaries	51			553			38
Net income attributable to the controlling interests	$	119,339		$	89,740		$	111,639
Basic net income attributable to the controlling interests per share
Continuing operations	$	1.65		$	1.31		$	0.08
Discontinued operations, including gain on sale of real estate	—			—			1.59
Net income attributable to the controlling interests per share	$	1.65		$	1.31		$	1.67
Diluted net income attributable to the controlling interests per share
Continuing operations	$	1.65		$	1.31		$	0.08
Discontinued operations, including gain on sale of real estate	—			—			1.59
Net income attributable to the controlling interests per share	$	1.65		$	1.31		$	1.67
Weighted average shares outstanding – basic	72,163			68,177			66,795
Weighted average shares outstanding – diluted	72,339			68,310			66,837

See accompanying notes to the consolidated financial statements.

63

WASHINGTON REAL ESTATE INVESTMENT TRUST AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

(IN THOUSANDS)

	Year Ended December 31,
	2016		2015			2014
Net income	$	119,288	$	89,187		$	111,601
Other comprehensive income (loss):
Unrealized gain (loss) on interest rate hedges	8,161		(550		)	—
Comprehensive income	127,449		88,637			111,601
Less: Net loss attributable to noncontrolling interests	51		553			38
Comprehensive income attributable to the controlling interests	$	127,500	$	89,190		$	111,639

See accompanying notes to the financial statements.

64

WASHINGTON REAL ESTATE INVESTMENT TRUST AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF EQUITY

(IN THOUSANDS)

	Shares	Shares of Beneficial Interest at Par Value		Additional Paid in Capital		Distributions  in Excess of Net Income			Accumulated Other Comprehensive Income (Loss)			Total Shareholders’ Equity			Non- controlling Interests in Subsidiaries			Total Equity
Balance, December 31, 2013	66,531	$	665	$	1,151,174	$	(396,880	)	$	—		$	754,959		$	4,487		$	759,446
Net income attributable to the controlling interests	—	—		—		111,639			—			111,639			—			111,639
Net loss attributable to noncontrolling interests	—	—		—		—			—			—			(38		)	(38		)
Distributions to noncontrolling interests	—	—		—		—			—			—			(1,784		)	(1,784		)
Contributions from noncontrolling interest	—	—		—		—			—			—			9			9
Dividends	—	—		—		(80,277		)	—			(80,277		)				(80,277		)
Equity offerings, net of issuance costs	1,125	11		30,679		—			—			30,690			—			30,690
Share grants, net of share grant amortization and forfeitures	163	2		2,542		—			—			2,544			—			2,544
Balance, December 31, 2014	67,819	678		1,184,395		(365,518		)	—			819,555			2,674			822,229
Net income attributable to the controlling interests	—	—		—		89,740			—			89,740			—			89,740
Net loss attributable to noncontrolling interests and deconsolidation of noncontrolling interest	—	—		—		—			—			—			(1,316		)	(1,316		)
Unrealized loss on interest rate hedges	—	—		—		—			(550		)	(550		)	—			(550		)
Contributions from noncontrolling interest	—	—		—		—			—			—			5			5
Dividends	—	—		—		(82,003		)	—			(82,003		)	—			(82,003		)
Equity offerings, net of issuance costs	184	2		5,213		—			—			5,215			—			5,215
Share grants, net of share grant amortization and forfeitures	188	2		3,690		—			—			3,692			—			3,692
Balance, December 31, 2015	68,191	682		1,193,298		(357,781		)	(550		)	835,649			1,363			837,012
Adjustment for retrospective application of new accounting principle (see note 2)	—	—		—		(35		)	—			(35		)	—			(35		)
Net income attributable to the controlling interests	—	—		—		119,339			—			119,339			—			119,339
Net loss attributable to noncontrolling interests	—	—		—		—			—			—			(51		)	(51		)
Unrealized gain on interest rate hedges	—	—		—		—			8,161			8,161			—			8,161
Distributions to noncontrolling interests	—	—		—		—			—			—			(196		)	(196		)
Dividends	—	—		—		(87,570		)	—			(87,570		)	—			(87,570		)
Equity offerings, net of issuance costs	6,223	62		172,874		—			—			172,936			—			172,936
Shares issued under Dividend Reinvestment Program	23	—		700		—			—			700			—			700
Share grants, net of share grant amortization, forfeitures and tax withholdings	169	2		1,764		—			—			1,766			—			1,766
Balance, December 31, 2016	74,606	$	746	$	1,368,636	$	(326,047	)	$	7,611		$	1,050,946		$	1,116		$	1,052,062

See accompanying notes to the consolidated financial statements.

65

WASHINGTON REAL ESTATE INVESTMENT TRUST AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF CASH FLOWS

(IN THOUSANDS)

	Year Ended December 31,
	2016			2015			2014
				(as adjusted)			(as adjusted)
Cash flows from operating activities
Net income	$	119,288		$	89,187		$	111,601
Adjustments to reconcile net income to net cash provided by operating activities:
Gain on sale of real estate	(101,704		)	(91,107		)	(106,555		)
Depreciation and amortization, including amounts in discontinued operations	108,406			108,935			96,011
Provision for losses on accounts receivable	1,706			1,368			1,402
Deferred tax benefit	(698		)	—			—
Casualty (gain) and real estate impairment loss, net	(676		)	5,909			—
Share-based compensation expense	3,491			5,112			4,995
Amortization of debt premiums, discounts and related financing costs	3,187			3,486			3,588
Loss on extinguishment of debt, net	—			119			—
Changes in other assets	(13,507		)	(10,388		)	(23,306		)
Changes in other liabilities	(2,562		)	(3,195		)	(4,619		)
Net cash provided by operating activities	116,931			109,426			83,117
Cash flows from investing activities
Real estate acquisitions, net	(227,413		)	(151,682		)	(194,536		)
Capital improvements to real estate	(57,094		)	(41,507		)	(57,810		)
Development in progress	(22,572		)	(31,203		)	(43,264		)
Net cash received from sale of real estate	243,624			137,014			190,864
Cash released from (held in) replacement reserve escrows	4,860			(3,511		)	(1,417		)
Insurance proceeds	883			—			—
Non-real estate capital improvements	(920		)	(2,129		)	(1,719		)
Net cash used in investing activities	(58,632		)	(93,018		)	(107,882		)
Cash flows from financing activities
Line of credit borrowings, net	15,000			55,000			50,000
Principal payments – mortgage notes payable	(270,061		)	(4,512		)	(3,954		)
Borrowing under construction loan	—			4,558			20,393
Notes payable repayments	—			(150,000		)	(100,000		)
Proceeds from dividend reinvestment program	700			—			—
Proceeds from term loan	100,000			150,000			—
Payment of financing costs	(1,590		)	(5,095		)	(742		)
Dividends paid	(85,648		)	(61,510		)	(80,277		)
Contributions from noncontrolling interests	—			5			9
Distributions to noncontrolling interests	(196		)	—			(3,454		)
Net proceeds from equity offerings	172,936			5,215			30,690
Payment of tax withholdings for restricted share awards	(1,960		)	(2,071		)	(2,416		)
Net cash used in financing activities	(70,819		)	(8,410		)	(89,751		)
Net (decrease) increase in cash and cash equivalents	(12,520		)	7,998			(114,516		)
Cash and cash equivalents at beginning of year	23,825			15,827			130,343
Cash and cash equivalents at end of year	$	11,305		$	23,825		$	15,827
Supplemental disclosure of cash flow information:
Cash paid for interest, net of capitalized interest expense	$	51,054		$	57,179		$	58,023
Cash paid for income taxes	$	65		$	261		$	156
Change in accrued capital improvements and development costs	$	(3,788	)	$	(4,229	)	$	(4,154	)
Dividends payable	$	22,414		$	20,434		$	—
Mortgage notes payable assumed in connection with the acquisition of real estate	$	—		$	—		$	100,861

See accompanying notes to the consolidated financial statements.

66

WASHINGTON REAL ESTATE INVESTMENT TRUST AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

FOR THE YEARS ENDED DECEMBER 31, 2016, 2015 AND 2014

NOTE 1: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 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. During the three years ended December 31, 2016, we sold our interests in the following properties (in thousands):

Disposition Date	Property	Type	Gain on Sale
May 26, 2016	Dulles Station II (1)	Office	$	527
June 27, 2016	Maryland Office Portfolio Transaction I (2)	Office	23,585
September 22, 2016	Maryland Office Portfolio Transaction II (3)	Office	77,592
		Total 2016	$	101,704
March 20, 2015	Country Club Towers	Multifamily	$	30,277
September 9, 2015	1225 First Street (4)	Multifamily	—
October 21, 2015	Munson Hill Towers	Multifamily	51,395
December 14, 2015	Montgomery Village Center	Retail	7,981
		Total 2015	$	89,653
January 21, 2014	Medical Office Portfolio Transactions III & IV (5)	Medical Office	$	105,985
May 2, 2014	5740 Columbia Road	Retail	570
		Total 2014	$	106,555

⁽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.

⁽⁴⁾ Interest in land held for future development.

⁽⁵⁾ Medical Office Portfolio Transactions III & IV consist of Woodburn Medical Park I and II and Prosperity Medical Center I, II and III.

The taxable gains for Dulles Station II and the properties included in Maryland Office Portfolio Transaction I were distributed to shareholders through the quarterly dividends. The properties included in Maryland Office Portfolio Transaction II were identified for a reverse deferred exchange under Section 1031 of the Internal Revenue Code. We acquired the replacement property, Riverside Apartments, during the second quarter of 2016 (see note 3, under "Acquisition"). We reinvested a portion of the Medical Office Portfolio Transactions III and IV, Country Club Towers, Munson Hill Towers and Montgomery Village Center sales proceeds in replacement properties through deferred tax exchanges.

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. During the second quarter of 2016, we recognized an income tax benefit of $0.7 million from a reduction of the valuation allowance for a deferred tax asset at one of our taxable REIT subsidiaries. As of December 31, 2016,

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our TRSs had deferred tax assets of $0.5 million, net of a valuation allowance of $2.9 million. The valuation allowance for deferred tax assets had a net decrease of $2.8 million during 2016. Our TRSs had no net deferred tax assets as of December 31, 2015. As of December 31, 2016 and 2015, our TRSs had deferred tax liabilities of $0.4 million and $0.7 million, respectively. These deferred tax liabilities are primarily related to temporary differences in the timing of the recognition of revenue, amortization and depreciation.

The following is a breakdown of the taxable percentage of our dividends for these years ended December 31, 2016, 2015 and 2014 (unaudited):

	2016		2015		2014
Ordinary income	66	%	78	%	40	%
Return of capital	33	%	22	%	52	%
Qualified dividends	—	%	—	%	—	%
Unrecaptured Section 1250 gain	1	%	—	%	8	%
Capital gain	—	%	—	%	—	%

NOTE 2:SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES AND BASIS OF PRESENTATION

Principles of Consolidation and Basis of Presentation

The accompanying audited 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 properties for which there is a noncontrolling interest. All intercompany balances and transactions have been eliminated in consolidation.

We have prepared the accompanying audited consolidated financial statements pursuant to the rules and regulations of the Securities and Exchange Commission.

Use of Estimates in the Financial Statements

The preparation of financial statements in conformity with Generally Accepted Accounting Principles ("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.

Recent Accounting Pronouncements

In January 2017, the Financial Accounting Standards Board (the "FASB") issued Accounting Standards Update No. 2017-01, Business Combinations (Topic 805) - Clarifying the Definition of a Business,which adds guidance to assist entities with evaluating whether transactions should be accounted for as acquisitions of assets or businesses. Under the new guidance, a set of transferred assets and activities is not a business when substantially all of the fair value of the gross assets acquired is concentrated in a single identifiable asset or group of similar identifiable assets. If a set of transferred assets and activities does not meet this threshold, then an entity must evaluate whether the set meets the requirement that a business include, at a minimum, an input and a substantive process that together significantly contribute to the ability to create outputs. The new standard is effective for public entities for fiscal years beginning after December 15, 2017 and for interim periods therein. Early adoption of the standard is allowed for transactions that have not been reported in financial statements issued prior to the new standards issuance date. Prior to the new guidance, we accounted for acquisitions of operating properties as business combinations, but generally expect that future acquisitions of operating properties will be accounted for as asset acquisitions under the new guidance. Acquisition costs are capitalized in asset acquisitions but expensed in business combinations. Identifiable assets, liabilities assumed and any noncontrolling interests are recognized and measured as of the acquisition date at fair value in a business combination, but are measured by allocating the cost of the acquisition on a relative fair value basis in an asset acquisition.

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.

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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 March 2016, the FASB issued Accounting Standards Update No. 2016-09, Improvements to Employee Share-Based Payment Accounting ("ASU 2016-09"),which amends existing accounting standards for employee share-based payments, including by allowing an employer to make a policy election to account for forfeitures as they occur or to continue to provide for an estimate as currently required. ASU 2016-09 also allows an employer to withhold shares in a net settlement in an amount that does not exceed the maximum statutory tax rate in the employees' tax jurisdiction without causing liability classification, and clarifies that all cash payments made to taxing authorities on the employees' behalf for withheld shares should be presented as financing activities on the consolidated statements of cash flows. ASU 2016-09 is effective for public entities for fiscal years beginning after December 15, 2016 and for interim periods therein with early adoption permitted. We adopted ASU 2016-09 as of December 31, 2016 and elected to account for forfeitures as they occur. In accordance with ASU 2016-09, we used the modified retrospective transition method for this election, resulting in a charge to retained earnings of less than $0.1 million. Regarding the cash payments made to taxing authorities on the employees' behalf for withheld shares, we had previously presented such payments as operating activities on our consolidated statements of cash flows, and have applied this change retrospectively. The impact of the implementation of ASU 2016-09 on our consolidated statements of cash flows is as follows (in thousands):

	Year Ended December 31,
	2016			2015			2014
Net cash provided by operating activities (prior to adoption of ASU 2016-09)	$	114,971		$	107,355		$	80,701
Reclassification of cash payments for withheld shares	1,960			2,071			2,416
Net cash provided by operating activities (after adoption of ASU 2016-09)	$	116,931		$	109,426		$	83,117
Net cash used in financing activities (prior to adoption of ASU 2016-09)	$	(68,859	)	$	(6,339	)	$	(87,335	)
Reclassification of cash payments for withheld shares	(1,960		)	(2,071		)	(2,416		)
Net cash used in financing activities (after adoption of ASU 2016-09)	$	(70,819	)	$	(8,410	)	$	(89,751	)

In February 2016, the FASB issued Accounting Standards Update No. 2016-05, Derivatives and Hedging (Topic 815), which clarifies that a change in the counterparty to a derivative instrument that has been designated as the hedging instrument under Topic 815, in and of itself, does not require dedesignation of that hedging relationship provided that all other hedging criteria continue to be met. The new standard is effective for public entities for fiscal years beginning after December 15, 2016 and for interim periods therein with early adoption permitted. We do not expect the new standard to have a material impact 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.

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In February 2015, the FASB issued Accounting Standards Update No. 2015-02, Consolidation (Topic 810), which changes the analysis an entity must perform to determine whether it should consolidate certain types of legal entities. Specifically, the new standard i) modifies the evaluation of whether limited partnerships and similar legal entities are variable interest entities ("VIEs") or voting interest entities, ii) eliminates the presumption that a general partner should consolidate a limited partnership and iii) affects the consolidation analysis of reporting entities that are involved with VIEs, particularly those that have fee arrangements and related party relationships. The new standard is effective for public entities for fiscal years beginning after December 15, 2015 and for interim periods therein. We adopted the new standard on January 1, 2016, and the provisions of the new standard did not have any impact on the consolidation of our legal entities.

In August 2014, the FASB issued ASU No. 2014-15, Presentation of Financial Statements - Going Concern (Subtopic 205-40), which provides guidance on management's responsibility to evaluate whether there is substantial doubt about an entity's ability to continue as a going concern and to provide related footnote disclosures. Under the new standard, if conditions or events raise substantial doubt about an entity's ability to continue as a going concern, and substantial doubt is not alleviated after consideration of management's plans, an entity should include a statement in the footnotes indicating that there is substantial doubt about the entity's ability to continue as a going concern. The new standard is effective for fiscal years ending after December 15, 2016 and for annual and interim periods thereafter. We adopted the new standard during the fourth quarter of 2016 and the adoption did not require any disclosures about our ability to continue as a going concern.

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 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, Leases (Topic 842), 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 No. 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.

Revenue Recognition

We lease multifamily properties under operating leases with terms of generally one year or less. We lease commercial properties (our office and retail segments) under operating leases with an average term of seven years. Substantially all commercial leases contain fixed escalations or, in some instances, changes based on the Consumer Price Index, which occur at specified times during the term of the lease. We recognize rental income and rental abatements from our multifamily and commercial leases when earned on a straight-line basis over the lease term. Recognition of rental income commences when control of the leased space has been given to the tenant.

We recognize sales of real estate at closing only when sufficient down payments have been obtained, possession and other attributes of ownership have been transferred to the buyer and we have no significant continuing involvement.

We recognize cost reimbursement income from pass-through expenses on an accrual basis over the periods in which the expenses were incurred. Pass-through expenses are comprised of real estate taxes, operating expenses and common area maintenance costs which are reimbursed by tenants in accordance with specific allowable costs per tenant lease agreements.

Parking revenues are derived from leases, monthly parking agreements and transient parking. We recognize parking revenues from leases on a straight-line basis over the lease term and other parking revenues as earned.

Accounts Receivable and Allowance for Doubtful Accounts

Accounts receivable primarily represents amounts accrued and unpaid from tenants in accordance with the terms of the respective leases, subject to our revenue recognition policy. We review receivables monthly and establish reserves when, in the opinion of management, collection of the receivable is doubtful. We establish reserves for tenants whose rent payment histories or financial conditions cast doubt upon the tenants’ abilities to perform under their lease obligations. When we determine the collection of a receivable to be doubtful in the same quarter that we established the receivable, we recognize the allowance for that receivable as an offset to real estate revenues. When we determine a receivable that was initially established in a prior quarter to be doubtful, we recognize the allowance as an operating expense in Real estate expenses in the consolidated statements of income. In addition to rents due currently, accounts receivable include amounts representing minimal rental income accrued on a straight-line basis

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to be paid by tenants over the remaining term of their respective leases.

Our accounts receivable balances include $2.4 million and $3.9 million of notes receivable as of December 31, 2016 and 2015, respectively.

Debt Issuance Costs

We amortize external debt issuance costs using the effective interest rate method or the straight-line method which approximates the effective interest rate method, over the estimated life of the related debt. We record debt issuance costs related to notes and mortgage notes, net of amortization, on our consolidated balance sheets as an offset to their related debt. We record debt issuance costs related to revolving lines of credit on our consolidated balance sheets with Prepaid expenses and other assets, regardless of whether a balance on the line of credit is outstanding. We record the amortization of all debt issuance costs as interest expense.

Deferred Leasing Costs

We capitalize and amortize costs associated with the successful negotiation of leases, both external commissions and internal direct costs, on a straight-line basis over the terms of the respective leases. We record the amortization of deferred leasing costs in Depreciation and amortization on the consolidated statements of income. If an applicable lease terminates prior to the expiration of its initial lease term, we write off the carrying amount of the costs to amortization expense.

We capitalize and amortize against revenue leasing incentives associated with the successful negotiation of leases on a straight-line basis over the terms of the respective leases. We record the amortization of deferred leasing incentives as a reduction of revenue. If an applicable lease terminates prior to the expiration of its initial lease term, we write off the carrying amount of the costs as a reduction of revenue.

Real Estate and Depreciation

We depreciate buildings on a straight-line basis over estimated useful lives ranging from 28 to 50 years. We capitalize all capital improvements associated with replacements, improvements or major repairs to real property that extend its useful life and depreciate them using the straight-line method over their estimated useful lives ranging from 3 to 30 years. We also capitalize costs incurred in connection with our development projects, including capitalizing interest incurred on borrowing obligations and other internal costs during periods in which qualifying expenditures have been made and activities necessary to get the development projects ready for their intended use are in progress. Capitalization of these costs begin when the activities and related expenditures commence and cease when the project is substantially complete and ready for its intended use, at which time the project is placed in service and depreciation commences. In addition, we capitalize tenant leasehold improvements when certain criteria are met, including when we supervise construction and will own the improvements. We depreciate all tenant improvements over the shorter of the useful life of the improvements or the term of the related tenant lease.

Real estate depreciation expense from continuing operations was $84.1 million, $80.7 million, $71.4 million during the years ended December 31, 2016, 2015 and 2014, respectively.

We charge maintenance and repair costs that do not extend an asset’s useful life to expense as incurred.

Interest expense and interest capitalized to real estate assets related to development and major renovation activities for the three years ended December 31, 2016 were as follows (in thousands):

	Year Ended December 31,
	2016			2015			2014
Total interest incurred	$	53,794		$	60,204		$	61,927
Capitalized interest	(668		)	(658		)	(2,142		)
Interest expense, net of capitalized interest	$	53,126		$	59,546		$	59,785

We recognize impairment losses on long-lived assets used in operations, development assets or land held for future development, if indicators of impairment are present and the net undiscounted cash flows estimated to be generated by those assets are less than the assets' carrying amount and estimated undiscounted cash flows associated with future development expenditures. If such carrying amount is in excess of the estimated undiscounted cash flows from the operation and disposal of the property, we would recognize an impairment loss equivalent to an amount required to adjust the carrying amount to its estimated fair value, calculated in accordance with current GAAP fair value provisions. Assets held for sale are recorded at the lower of cost or fair value less

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costs to sell.

We record acquired or assumed assets, including physical assets and in-place leases, and liabilities, based on their fair values. We determine the fair values of acquired buildings on an “as-if-vacant” basis considering a variety of factors, including the replacement cost of the property, estimated rental and absorption rates, estimated future cash flows and valuation assumptions consistent with current market conditions. We determine the fair value of land acquired based on comparisons to similar properties that have been recently marketed for sale or sold.

The fair value of in-place leases consists of the following components – (a) the estimated cost to us to replace the leases, including foregone rents during the period of finding a new tenant and foregone recovery of tenant pass-throughs (referred to as “absorption cost”); (b) the estimated cost of tenant improvements, and other direct costs associated with obtaining a new tenant (referred to as “tenant origination cost”); (c) estimated leasing commissions associated with obtaining a new tenant (referred to as “leasing commissions”); (d) the above/at/below market cash flow of the leases, determined by comparing the projected cash flows of the leases in place, including consideration of renewal options, to projected cash flows of comparable market-rate leases (referred to as “net lease intangible”); and (e) the value, if any, of customer relationships, determined based on our evaluation of the specific characteristics of each tenant’s lease and our overall relationship with the tenant (referred to as “customer relationship value”). We have attributed no value to customer relationships as of December 31, 2016 and 2015.

We discount the amounts used to calculate net lease intangibles using an interest rate which reflects the risks associated with the leases acquired. We classify tenant origination costs as Income producing property on our consolidated balance sheets and amortize the tenant origination costs as depreciation expense on a straight-line basis over the remaining life of the underlying leases. We classify leasing commissions and absorption costs as other assets and amortize leasing commissions and absorption costs as amortization expense on a straight-line basis over the remaining life of the underlying leases. We classify net lease intangible assets as other assets and amortize them on a straight-line basis as a decrease to real estate rental revenue over the remaining term of the underlying leases. We classify net lease intangible liabilities as other liabilities and amortize them on a straight-line basis as an increase to real estate rental revenue over the remaining term of the underlying leases. If any of the fair value of below market lease intangibles includes fair value associated with a renewal option, such amounts are not amortized until the renewal option is executed, else the related value is expensed at that time. Should a tenant terminate its lease, we accelerate the amortization of the unamortized portion of the tenant origination cost, leasing commissions, absorption costs and net lease intangible associated with that lease, over its new, shorter term.

Balances, net of accumulated depreciation or amortization, as appropriate, of the components of the fair value of in-place leases at December 31, 2016 and 2015 were as follows (in thousands):

	December 31,
	2016						2015
	Gross Carrying Value		Accumulated Amortization		Net		Gross Carrying Value		Accumulated Amortization		Net
Tenant origination costs	$	54,352	$	44,823	$	9,529	$	55,664	$	41,138	$	14,526
Leasing commissions/absorption costs	101,311		86,210		15,101		97,678		75,014		22,664
Net lease intangible assets	18,903		14,193		4,710		19,655		12,434		7,221
Net lease intangible liabilities	33,687		25,359		8,328		34,027		23,444		10,583
Below-market ground lease intangible asset	12,080		1,714		10,366		12,080		1,524		10,556

Amortization of these combined components during the three years ended December 31, 2016, 2015 and 2014 was as follows (in thousands):

	Year Ended December 31,
	2016		2015		2014
Depreciation and amortization expense	$	17,655	$	22,244	$	19,854
Real estate rental revenue, net	410		538		456
	$	18,065	$	22,782	$	20,310

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Amortization of these combined components over the next five years is projected to be as follows (in thousands):

	Depreciation and amortization expense		Real estate rental revenue, net decrease (increase)			Total
2017	$	8,874	$	(148	)	$	8,726
2018	6,096		(633		)	5,463
2019	3,572		(525		)	3,047
2020	2,357		(320		)	2,037
2021	1,411		(313		)	1,098

Discontinued Operations

We classify properties as held for sale when they meet the necessary criteria, which include: (a) senior management commits to and actively embarks upon a plan to sell the assets, (b) the sale is expected to be completed within one year under terms usual and customary for such sales and (c) actions required to complete the plan indicate that it is unlikely that significant changes to the plan will be made or that the plan will be withdrawn. We generally consider that a property has met these criteria when a sale of the property has been approved by the board of trustees, or a committee with authorization from the board of trustees, there are no known significant contingencies related to the sale and management believes it is probable that the sale will be completed within one year. Depreciation on these properties is discontinued at the time they are classified as held for sale, but operating revenues, operating expenses and interest expense continue to be recognized until the date of sale.

Under ASU No. 2014-08, Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity, which we adopted as of January 1, 2014, revenues and expenses of properties that are either sold or classified as held for sale are presented as discontinued operations for all periods presented in the consolidated statements of income if the dispositions represent a strategic shift that has (or will have) a major effect on our operations and financial results. Interest on debt that can be identified as specifically attributed to these properties is included in discontinued operations. If the dispositions do not represent a strategic shift that has (or will have) a major effect on our operations and financial results, then the revenues and expenses of the properties that are classified as sold or held for sale are presented as continuing operations in the consolidated statements of income for all periods presented. The provisions of ASU No. 2014-08 apply only to properties classified as held for sale or sold after our adoption date of January 1, 2014.

Segments

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.

Cash and Cash Equivalents

Cash and cash equivalents include cash and commercial paper with original maturities of 90 days or less. We maintain cash deposits with financial institutions that at times exceed applicable insurance limits. We reduce this risk by maintaining such deposits with high quality financial institutions that management believes are credit-worthy.

Restricted Cash

Restricted cash includes funds escrowed for tenant security deposits, real estate tax, insurance and mortgage escrows and escrow deposits required by lenders on certain of our properties to be used for future building renovations or tenant improvements.

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.

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We also determine “Diluted earnings per share” under the two-class method with respect to the unvested restricted share awards. We further evaluate any other potentially dilutive securities at the end of the period and adjust the basic earnings per share calculation for the impact of those securities that are dilutive. Our dilutive earnings per share calculation includes the dilutive impact of employee stock options based on the treasury stock method and our performance share units under the contingently issuable method.

Stock Based Compensation

We currently maintain equity based compensation plans for trustees, officers and employees.

We recognize compensation expense for service-based share awards ratably over the period from the service inception date through the vesting period based on the fair market value of the shares on the date of grant. If an award's service inception date precedes the grant date, we initially measure compensation expense for awards with performance conditions at fair value at the service inception date based on probability of payout, and we remeasure compensation expense at subsequent reporting dates until all of the award’s key terms and conditions are known and the grant date is established. We amortize awards with performance conditions using the graded expense method. We measure compensation expense for awards with market conditions based on the grant date fair value, as determined using a Monte Carlo simulation, and we amortize the expense ratably over the requisite service period, regardless of whether the market conditions are achieved and the awards ultimately vest. Compensation expense for the trustee grants, which fully vest immediately, is fully recognized upon issuance based upon the fair market value of the shares on the date of grant.

Accounting for Uncertainty in Income Taxes

We can recognize a tax benefit only if it is “more likely than not” that a particular tax position will be sustained upon examination or audit. To the extent that the “more likely than not” standard has been satisfied, the benefit associated with a tax position is measured as the largest amount that is greater than 50% likely of being recognized upon settlement. As of December 31, 2016 and 2015, we did not have any unrecognized tax benefits. We do not believe that there will be any material changes to our uncertain tax positions over the next twelve months.

We are subject to federal income tax as well as income tax of the states of Maryland and Virginia, and the District of Columbia. However, as a REIT, we generally are not subject to income tax on our taxable income to the extent it is distributed as dividends to our shareholders.

Tax returns filed for 2012 through 2016 tax years are subject to examination by taxing authorities. We classify interest and penalties related to uncertain tax positions, if any, in our financial statements as a component of general and administrative expense.

Derivatives

We borrow funds at a combination of fixed and variable rates. Borrowings under our revolving credit facility and term loans bear interest at variable rates. Our interest rate risk management objectives are to minimize interest rate fluctuation on long-term indebtedness and limit the impact of interest rate changes on earnings and cash flows. To achieve these objectives, from time to time, we may enter into interest rate hedge contracts such as collars, swaps, caps and treasury lock agreements in order to mitigate our interest rate risk with respect to various debt instruments. We generally do not hold or issue these derivative contracts for trading or speculative purposes. The interest rate swaps we enter into are recorded at fair value on a recurring basis. We assess effectiveness of our cash flow hedges both at inception and on an ongoing basis. The effective portion of changes in fair value of the interest rate swaps associated with our cash flow hedges is recorded in accumulated other comprehensive income (loss). Our cash flow hedges become ineffective if critical terms of the hedging instrument and the debt instrument such as notional amounts, settlement dates, reset dates, calculation period and LIBOR do not perfectly match. In addition, we evaluate the default risk of the counterparty by monitoring the creditworthiness of the counterparty. When ineffectiveness of a cash flow hedge exists, the ineffective portion of changes in fair value of the interest rate swaps associated with our cash flow hedges is recognized in earnings in the period affected.

Reclassifications

In prior years, we elected to present our real estate expenses on the consolidated statements of income disaggregated into the following categories: utilities, real estate taxes, repairs and maintenance, property administration and management, operating services and common area maintenance and other real estate expenses. There is no requirement under GAAP or applicable Securities and Exchange Commission rules to present real estate expenses in a disaggregated manner. In the interest of presenting our financial results in a more direct and concise manner, we have elected to aggregate our real estate expenses on our consolidated statements

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of income. Prior year amounts have been reclassified to conform with current year presentation as follows (in thousands):

	Year Ended December 31,
	2015		2014
Utilities	$	18,004	$	18,056
Real estate taxes	37,152		33,436
Repairs and maintenance	14,095		13,375
Property administration and management	23,099		20,460
Operating services and common area maintenance	15,974		15,068
Other real estate expenses	3,910		3,300
Real estate expenses	$	112,234	$	103,695

Also in prior years, we included income tax benefit (expense) in general and administrative costs on our consolidated statements of income because the amounts of our income tax benefit (expense) were not material. Due to the income tax benefit of $0.7 million we recognized during the second quarter of 2016 (see note 1), we have elected to present income tax benefit (expense) as a separate line item. Income tax expense of $0.1 million for each of the years ended December 31, 2015 and 2014 have been reclassified out of general and administrative expenses in order to conform with current year presentation.

NOTE 3:REAL ESTATE

As of December 31, 2016 and 2015, our real estate investment portfolio, at cost, consists of properties as follows (in thousands):

	December 31,
	2016		2015
Office	$	1,349,378	$	1,554,334
Multifamily	885,084		641,424
Retail	450,941		442,039
	$	2,685,403	$	2,637,797

Our results of operations are dependent on the overall economic health of our markets, tenants and the specific segments in which we own properties. These segments include office, retail and multifamily. All segments are affected by external economic factors, such as inflation, consumer confidence and unemployment rates, as well as changing tenant and consumer requirements.

As of December 31, 2016, one property, Riverside Apartments, accounted for more than 10% of total assets. No single property or tenant accounted for more than 10% of the real estate rental revenue.

We have properties under development/redevelopment and held for current or future development as of December 31, 2016 and 2015. In the office segment, we had a redevelopment project to renovate Silverline Center, an office property in Tysons, Virginia. We completed major construction activities on this project during the second quarter of 2015, and placed into service substantially completed portions of the project at the time totaling $25.9 million, with the remaining components placed into service as of March 31, 2016. We also currently 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 December 31, 2016, we had invested $2.2 million in the redevelopment.

In the multifamily segment, we have Trove, a multifamily development adjacent to The Wellington, and own land held for future multifamily development adjacent to Riverside Apartments. As of December 31, 2016, we had invested $19.0 million and $16.4 million, including the costs of acquired land, in 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 Shopping Center. As of December 31, 2016, we had invested $1.1 million in the redevelopment.

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The cost of our real estate portfolio under development or held for future development as of December 31, 2016 and 2015 is as follows (in thousands):

	December 31,
	2016		2015
Office	$	2,640	$	18,711
Multifamily	36,013		16,307
Retail	1,579		1,076
	$	40,232	$	36,094

Acquisitions

Our current strategy is to recycle legacy assets that lack the income growth potential we seek and to invest in high-quality assets with compelling value-add returns through redevelopment opportunities in our existing portfolio and acquisitions that meet our stringent investment criteria. We focus on properties inside the Washington metro region’s Beltway, near major transportation nodes and in areas with strong employment drivers and superior growth demographics.

Properties and land for development acquired during the three years ended December 31, 2016 were as follows:

Acquisition Date	Property	Type	# of units (unaudited)	Rentable Square  Feet (unaudited)	Contract Purchase  Price (in thousands)
May 20, 2016	Riverside Apartments	Multifamily	1,222	N/A	$	244,750
July 1, 2015	The Wellington	Multifamily	711	N/A	$	167,000
February 21, 2014	Yale West	Multifamily	216	N/A	$	73,000
March 26, 2014	The Army Navy Building	Office	N/A	108,000	79,000
May 1, 2014	1775 Eye Street, NW	Office	N/A	185,000	104,500
October 1, 2014	Spring Valley Retail Center	Retail	N/A	75,000	40,500
		Total 2014	216	368,000	$	297,000

The results of operations from acquired operating properties are included in the consolidated statements of income as of their acquisition dates.

The revenue and earnings of our acquisitions during their year of acquisition for the three years ended December 31, 2016 are as follows (in thousands):

	Year Ended December 31,
	2016			2015			2014
Real estate rental revenue	$	13,112		$	6,797		$	16,260
Net loss	(1,688		)	(2,748		)	(3,168		)

As discussed in note 2, we record the acquired physical assets (land, building and tenant improvements), in-place leases (absorption, tenant origination costs, leasing commissions, and net lease intangible assets/liabilities), and any other liabilities at their fair values.

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We have recorded the total purchase price of the above acquisitions as follows (in thousands):

	2016			2015		2014
Land	$	38,924		$	30,548	$	104,403
Land held for development	15,968			15,000		—
Buildings	184,854			116,563		172,671
Tenant origination costs	—			—		9,377
Leasing commissions/absorption costs	4,992			4,889		16,474
Net lease intangible assets	22			—		7,331
Net lease intangible liabilities	(10		)	—		(8,323		)
Fair value of assumed mortgage	—			—		(107,125		)
Furniture, fixtures & equipment	—			—		932
Total	$	244,750		$	167,000	$	195,740

The weighted remaining average life for 2016 acquisition components above, other than land and building, are 87 months for net lease intangible assets and 43 months for net lease intangible liabilities. The leasing commissions/absorption costs acquired in 2016 were substantially amortized as of December 31, 2016, as such costs were primarily related to assumed apartment leases. The net lease intangible assets and liabilities are associated with leases for retail space at Riverside Apartments.

The difference in the total contract price of $244.8 million for the 2016 acquisition and cash paid for the acquisition per the consolidated statements of cash flows of $227.4 million is primarily due to acquisition of land for development of $16.0 million and credits received at settlement totaling $1.4 million.

The difference in the total contract price of $167.0 million for the 2015 acquisition and cash paid for the acquisition per the consolidated statements of cash flows of $151.7 million is primarily due to acquisition of land for development of $15.0 million and credits received at settlement totaling $0.3 million.

The difference in the total contract price of $297.0 million for the 2014 acquisitions and cash paid for the acquisitions per the consolidated statements of cash flows of $194.5 million is primarily due to the assumption of two mortgage notes secured by Yale West and The Army Navy Building for an aggregate carrying value of $100.9 million and the payment of a $3.6 million deposit for Yale West in 2013, partially offset by a credit to the seller for building renovations at 1775 Eye Street, NW for $1.9 million.

The following unaudited pro-forma combined condensed statements of operations set forth the consolidated results of operations for the years ended December 31, 2016 and 2015 as if the above described acquisition in 2016 had occurred on January 1, 2015. The pro forma adjustments exclude acquisition costs directly related to the above-described acquisition. The unaudited pro-forma information does not purport to be indicative of the results that actually would have occurred if the acquisition had been in effect for the years ended December 31, 2016 and 2015. The unaudited data presented is in thousands, except per share data.

	Year Ended December 31,
	2016		2015
Real estate revenues	$	321,386	$	327,605
Net income	$	127,439	$	90,040
Diluted earnings per share	$	1.76	$	1.31

Noncontrolling Interests in Subsidiaries

In August 2007, we acquired a 0.8 acre parcel of land located at 4661 Kenmore Avenue, Alexandria, Virginia for future medical office development. The acquisition was funded by issuing operating partnership units in an operating partnership, which is a consolidated subsidiary of Washington REIT. This resulted in a noncontrolling ownership interest in this property based upon defined company operating partnership units at the date of purchase. In November 2013, 4661 Kenmore Avenue was sold as part of the Medical Office Portfolio (see "Properties Sold ") and in 2014, we distributed to the noncontrolling interest holder their share of the proceeds.

Variable Interest Entities

In November 2011, we executed a joint venture operating agreement with a real estate development company to develop a high-rise multifamily property at 1225 First Street in Alexandria, Virginia. Washington REIT and the real estate development company

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owned 95% and 5% of the joint venture, respectively. During the second quarter of 2015, we determined that we would not develop the property and began negotiations to sell our interest in the joint venture. We recognized a $5.9 million impairment charge for the second quarter of 2015 in order to reduce the carrying value of the property to its estimated fair value. We based this fair value on the contract sale price in the purchase and sale agreement. This fair valuation falls into Level 2 of the fair value hierarchy. During the third quarter of 2015, we sold our 95% interest in the joint venture for a contract sale price of $14.5 million and deconsolidated the entity, as this joint venture had previously been consolidated as Washington REIT was the primary beneficiary of the VIE.

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 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 90.0% owner of the joint venture. The real estate development company owns 10.0% 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. As of December 31, 2015, $32.2 million was outstanding on The Maxwell's construction loan. 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 loan became an intercompany payable from the consolidated VIE to Washington REIT that is eliminated in consolidation.

We include joint venture land acquisitions and related capitalized development costs on our consolidated balance sheets in properties under development or held for future development until placed in service or sold. The Maxwell was placed into service during the fourth quarter of 2014 and first quarter of 2015. As of December 31, 2016 and 2015, The Maxwell's assets were as follows (in thousands):

	December 31,
	2016			2015
Land	$	12,851		$	12,851
Income producing property	37,949			37,791
Accumulated depreciation and amortization	(4,571		)	(2,347		)
Other assets	456			1,188
	$	46,685		$	49,483

As of December 31, 2016 and 2015, The Maxwell's liabilities were as follows (in thousands):

	December 31,
	2016			2015
Mortgage notes payable, net	$	31,869	(1)	$	32,214
Accounts payable and other liabilities	186			256
Tenant security deposits	99			82
	$	32,154		$	32,552

⁽¹⁾ The mortgage notes payable balance as of December 31, 2016 is eliminated in consolidation due to the purchase of the loan by Washington REIT in January 2016.

Properties Sold

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. There were no properties held for sale as of December 31, 2016 or 2015.

During the second quarter of 2016, we sold Dulles Station, Phase II, which consists of land held for future development and an

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interest in a parking garage in Herndon, Virginia, for $12.1 million. Also during the second quarter of 2016, we executed two purchase and sale agreements with a single buyer for the sale of a portfolio of six office properties located in Maryland: 6110 Executive Boulevard, Wayne Plaza, 600 Jefferson Plaza, West Gude Drive, 51 Monroe Street and One Central Plaza (collectively, the "Maryland Office Portfolio") for an aggregate contract sales price of $240.0 million. We closed on the first sale transaction in June 2016 and closed on the second sale transaction in September 2016.

During the second quarter of 2015, 15,000 square feet of land at Montrose Shopping Center, a retail property in Rockville, Maryland, was condemned as part of an eminent domain taking action. The taken land was at the periphery of the property and its taking did not impact the property's operations. We received $2.0 million as compensation for the taken land, and recognized a $1.4 million gain on sale of real estate during the second quarter of 2015.

We sold our interests in the following properties during the three years ended December 31, 2016:

Disposition Date	Property	Segment	# of units (unaudited)	Rentable Square Feet (unaudited)	Contract Sales Price (in thousands)		Gain on Sale (in thousands)
May 26, 2016	Dulles Station, Phase II (1)	Office	N/A	N/A	$	12,100	$	527
June 27, 2016	Maryland Office Portfolio Transaction I (2)	Office	N/A	692,000	111,500		23,585
September 22, 2016	Maryland Office Portfolio Transaction II (3)	Office	N/A	491,000	128,500		77,592
		Total 2016		1,183,000	$	252,100	$	101,704
March 20, 2015	Country Club Towers	Multifamily	227	N/A	$	37,800	$	30,277
September 9, 2015	1225 First Street (4)	Multifamily	N/A	N/A	14,500		—
October 21, 2015	Munson Hill Towers	Multifamily	279	N/A	57,050		51,395
December 14, 2015	Montgomery Village Center	Retail	N/A	197,000	27,750		7,981
		Total 2015	506	197,000	$	137,100	$	89,653
January 21, 2014	Medical Office Portfolio Transactions III & IV (5)	Medical Office	N/A	427,000	$	193,561	$	105,985
May 2, 2014	5740 Columbia Road	Retail	N/A	3,000	1,600		570
		Total 2014	N/A	430,000	$	195,161	$	106,555

⁽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.

⁽⁴⁾  Interest in land held for future development.

⁽⁵⁾   These properties are classified as discontinued operations. All other sold properties are classified as continuing operations.

We do not have significant continuing involvement in the operations of the disposed properties.

While the Maryland Office Portfolio, in the aggregate, constitutes an individually significant disposition, it 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 years endedDecember 31, 2016 are as follows:

	Year Ending December 31,
	2016		2015		2014
Real estate rental revenue	$	20,266	$	32,423	$	31,811
Net income	9,376		9,848		9,352

In September 2013, we entered into fourseparate purchase and sale agreements to effectuate the sale of our entire medical office segment (including land held for development at 4661 Kenmore Avenue) and two office buildings (Woodholme Center and 6565 Arlington Boulevard) for an aggregate purchase price of $500.8 million. The sale was structured as four transactions. Transactions I & II closed in November 2013 and Transactions III & IV in January 2014.

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The impact of the sale of our medical office segment on revenues and net income is summarized as follows (in thousands, except per share data):

	Year Ending December 31,
	2016		2015		2014
Real estate revenues	$	—	$	—	$	892
Net income	—		—		546
Basic and diluted net income per share	—		—		0.01

Income from properties classified as discontinued operations for the three years ended December 31, 2016 was as follows (in thousands):

	Year Ending December 31,
	2016		2015		2014
Revenues	$	—	$	—	$	892
Property expenses	—		—		(346		)
	$	—	$	—	$	546

Casualty Gains

We recorded a net casualty gain of $0.7 million during the second quarter of 2016 associated with a fire at Bethesda Hill Towers that damaged four units, which is included in casualty (gain) and real estate impairment loss, net on our consolidated statements of income. The net casualty gain is comprised of $0.9 million in third-party insurance proceeds received by us, which were partially offset by casualty charges of $0.2 million to write off the net book value of the damaged units at Bethesda Hill Towers.

NOTE 4:MORTGAGE NOTES PAYABLE

As of December 31, 2016 and 2015, we had outstanding mortgage notes payable, each collateralized by one or more buildings and related land from our portfolio, as follows (in thousands):

				December 31,
Properties	Assumption/Issuance Date (1)	Effective Interest Rate (2)		2016			2015			Payoff Date/Maturity Date
Army Navy Building (3)	3/26/2014	3.18	%	$	49,618		$	50,750		2/1/2017
Yale West (4)	2/21/2014	3.75	%	47,078			47,502			1/31/2022
The Maxwell (5)	2/21/2013	2.27	%	—			32,248			1/27/2016
John Marshall II (6)	9/15/2011	5.79	%	—			51,011			2/8/2016
Olney Village Center	8/30/2011	4.94	%	14,851			16,503			10/1/2023
Kenmore Apartments	2/2/2009	5.37	%	32,938			33,637			3/1/2019
2445 M Street (7)	12/2/2008	7.25	%	—			101,866			10/6/2016
3801 Connecticut Avenue, Walker House and Bethesda Hill (8)	5/29/2008	5.71	%	—			81,029			6/1/2016
				144,485			414,546
Premiums and discounts, net				4,354			4,175
Debt issuance costs, net				(299		)	(669		)
				$	148,540		$	418,052

⁽¹⁾ Each of these mortgages was assumed with the acquisition of the collateralized properties, except for the mortgage notes secured by 3801 Connecticut Avenue, Walker House, Bethesda Hill, Kenmore Apartments, and the construction loan secured by the development project at The Maxwell, which were originally executed by Washington REIT. We record mortgages assumed in an acquisition at fair value.

⁽²⁾ Yield on the assumption/issuance date, including the effects of any premiums, discounts or fair value adjustments on the notes.

⁽³⁾ The note was prepaid without penalty in February 2017.

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⁽⁴⁾ The maturity date of the mortgage note is January 1, 2052, but can be prepaid, without penalty, beginning on January 31, 2022.

⁽⁵⁾ Interest rate on The Maxwell construction loan was variable, based on LIBOR plus 2.0%. Interest and principal was payable monthly starting March 2016 until the extended maturity date of February 20, 2017, upon which all unpaid principal and interest were payable in full. In January 2016, Washington REIT exercised its right to purchase the construction loan without penalty from the lender (see note 3, under "Variable Interest Entities").

⁽⁶⁾ The note was prepaid without penalty in February 2016.

⁽⁷⁾ Interest only was payable monthly until the note was prepaid without penalty in October 2016.

⁽⁸⁾ Interest only was payable monthly until the note was repaid without penalty in June 2016.

Except as noted above, principal and interest are payable monthly until the maturity date, upon which all unpaid principal and interest are payable in full.

Total carrying amount of the above mortgaged properties was $280.4 million and $619.4 million at December 31, 2016 and 2015, respectively.

Scheduled principal payments subsequent to December 31, 2016 are as follows (in thousands):

2017	$	52,571
2018	3,135
2019	33,909
2020	2,659
2021	2,829
Thereafter	49,382
	$	144,485

In February 2017, we prepaid without penalty the remaining $49.6 million of the mortgage note secured by the Army Navy Building using borrowings on our 2016 Term Loan.

NOTE 5:UNSECURED LINES OF CREDIT PAYABLE

During the second quarter of 2015, we terminated our $100.0 million unsecured line of credit maturing in June 2015 and our $400.0 million unsecured line of credit maturing in July 2016, and executed a new $600.0 million unsecured credit agreement ("Revolving Credit Facility") that matures in June 2019, unless extended pursuant to one or both of the twosix-month extension options. The Revolving Credit Facility has an accordion feature 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 amount of the Revolving Credit Facility unused and available at December 31, 2016 was as follows (in thousands):

Committed capacity	$	600,000
Borrowings outstanding	(120,000		)
Unused and available	$	480,000

We executed borrowings and repayments on the Revolving Credit Facility during 2016 as follows (in thousands):

Balance at December 31, 2015	$	105,000
Borrowings	651,000
Repayments	(636,000		)
Balance at December 31, 2016	$	120,000

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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% 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 0.5% and the one month LIBOR market index rate plus 1.0%. As of December 31, 2016, the interest rate on the facility is one month LIBOR plus 1.0% and the one month LIBOR was 0.77%.

All outstanding advances for the Revolving Credit Facility are due and payable upon maturity in June 2019, unless extended pursuant to one or both of the two six-month extension options. Interest only payments are due and payable generally on a monthly basis. 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 December 31, 2016, the facility fee is 0.20%.

For the three years ended December 31, 2016, we recognized interest expense (excluding facility fees) and facility fees as follows (in thousands):

	Year Ended December 31,
	2016		2015		2014
Interest expense (excluding facility fees)	$	3,272	$	2,266	$	196
Facility fees	1,220		1,241		1,267

The Revolving Credit Facility contains certain financial and non-financial covenants, all of which we have met as of December 31, 2016 and 2015. Included in these covenants are limits on our total indebtedness, secured and unsecured indebtedness and required debt service payments.

Information related to revolving credit facilities for the three years ended December 31, 2016 as follows (in thousands, except percentage amounts):

	Year Ended December 31,
	2016			2015			2014
Total revolving credit facilities at December 31	$	600,000		$	600,000		$	500,000
Borrowings outstanding at December 31	120,000			105,000			50,000
Weighted average daily borrowings during the year	214,962			167,573			12,849
Maximum daily borrowings during the year	358,000			350,000			55,000
Weighted average interest rate during the year	1.52		%	1.35		%	1.53		%
Weighted average interest rate on borrowings outstanding at December 31	1.64		%	1.36		%	1.37		%

The covenants under our Revolving Credit Facility require us to insure our properties against loss or damage in amounts customarily maintained by similar businesses or as they may be required by applicable law. The covenants for the notes require us to keep all of our insurable properties insured against loss or damage at least equal to their then full insurable value. We have an insurance policy that has no terrorism exclusion, except for non-certified nuclear, chemical and biological acts of terrorism. Our financial condition and results of operations are subject to the risks associated with acts of terrorism and the potential for uninsured losses as the result of any such acts. Effective November 26, 2002, under this existing coverage, any losses caused by certified acts of terrorism would be partially reimbursed by the United States under a formula established by federal law. Under this formula, the United States pays 85% of covered terrorism losses exceeding the statutorily established deductible paid by the insurance provider, and insurers pay 10% until aggregate insured losses from all insurers reach $100 billion in a calendar year. If the aggregate amount of insured losses under this program exceeds $100 billion during the applicable period for all insured and insurers combined, then each insurance provider will not be liable for payment of any amount which exceeds the aggregate amount of $100 billion. On January 12, 2015, the Terrorism Risk Insurance Program Reauthorization Act of 2015 was signed into law and extended the program through December 31, 2020.

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NOTE 6:NOTES PAYABLE

Our unsecured notes outstanding as of December 31, 2016 were as follows (in thousands):

	Coupon/Stated Rate		Effective Rate (1)		Principal Amount			Maturity Date (2)
10 Year Unsecured Notes	4.95	%	5.05	%	$	250,000		10/1/2020
2015 Term Loan	1 Month LIBOR + 110 basis points		2.72	%	150,000			3/15/2021
10 Year Unsecured Notes	3.95	%	4.02	%	300,000			10/15/2022
2016 Term Loan	1 Month LIBOR + 165 basis points		2.86	%	100,000			7/21/2023
30 Year Unsecured Notes	7.25	%	7.36	%	50,000			2/25/2028
Total principal					850,000
Premiums and discounts, net					(1,971		)
Deferred issuance costs, net					(4,945		)
Total					$	843,084

⁽¹⁾ For fixed rate notes, the effective rate represents the yield on issuance date, including the effects of discounts on the notes. For variable rate notes, the effective rate represents the rate as fixed by interest rate derivatives (see note 7).

⁽²⁾ No principal amounts are due prior to maturity.

During the third quarter of 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 the daily one-month LIBOR rate 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 subsequent to the end of 2016. We also entered into forward interest rate derivatives commencing on March 31, 2017 to effectively fix the interest rate on the 2016 Term Loan at 2.86% (see note 7).

The required principal payments as of December 31, 2016 are as follows (in thousands):

2017	$	—
2018	—
2019	—
2020	250,000
2021	150,000
Thereafter	450,000
	$	850,000

Interest on these notes is payable semi-annually, except for the term loans, for which interest is payable monthly. These notes contain certain financial and non-financial covenants, all of which we have met as of December 31, 2016. Included in these covenants is the requirement to maintain a minimum level of unencumbered assets, as well as limits on our total indebtedness, secured indebtedness and required debt service payments.

NOTE 7: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 6) 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 2.86%, starting on March 31, 2017 and extending until the maturity of the 2016 Term Loan on July 21, 2023.

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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 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 2016 and 2015 and hedge ineffectiveness did not impact earnings in 2016 and 2015.

The fair values of the interest rate swaps as of December 31, 2016 and 2015, are as follows (in thousands):

	Aggregate Notional Amount		Effective Date		Fair Value
					Asset Derivatives				Liability Derivatives
					December 31,				December 31,
Derivative Instrument				Maturity Date	2016		2015		2016		2015
Interest rate swaps	$	150,000	October 15, 2015	March 15, 2021	$	417	$	—	$	—	$	550
Interest rate swaps	150,000		March 31, 2017	July 21, 2023	7,194		N/A		—		N/A
	$	300,000			$	7,611	$	—	$	—	$	550

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 gains or losses on the effective swaps are recognized in other comprehensive income (loss), as follows (in thousands):

	Year Ending December 31,
	2016		2015			2014
Unrealized gain (loss) on interest rate hedges	$	8,161	$	(550	)	$	—

Amounts reported in accumulated other comprehensive income (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 $1.2 million will be reclassified as a decrease to interest expense.

We have agreements with each of our derivative counterparties that contain a provision whereby we could be declared in default on our derivative obligations if repayment of the underlying indebtedness is accelerated by the lender due to our default on the indebtedness. As of December 31, 2016, the fair values of derivatives were in a net asset position of $7.6 million, including accrued interest but excluding any adjustment for nonperformance risk. As of December 31, 2016, 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.

NOTE 8: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 December 31, 2016 and 2015 that are recorded at fair value on a recurring basis are the assets held in the Supplemental Executive Retirement Plan ("SERP"), which primarily consists 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

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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 December 31, 2016 and 2015 were as follows (in thousands):

	December 31, 2016								December 31, 2015
	Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets:
SERP	$	1,407	$	—	$	1,407	$	—	$	1,408	$	—	$	1,408	$	—
Derivatives	7,611		—		7,611		—		—		—		—		—
Liabilities:
Derivatives	—		—		—		—		550		—		550		—

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 December 31, 2016 may differ significantly from the amounts presented.

Below is a summary of significant methodologies used in estimating fair values and a schedule of fair values at 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 bank facilities 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

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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 December 31, 2016 and 2015, the carrying values and estimated fair values of our financial instruments were as follows (in thousands):

	December 31,
	2016				2015
	Carrying Value		Fair Value		Carrying Value		Fair Value
Cash and cash equivalents	$	11,305	$	11,305	$	23,825	$	23,825
Restricted cash	6,317		6,317		13,383		13,383
2445 M Street note receivable	2,089		2,173		3,849		4,275
Mortgage notes payable	148,540		149,997		418,052		426,693
Lines of credit payable	120,000		120,000		105,000		105,000
Notes payable	843,084		873,516		743,181		753,816

NOTE 9:STOCK BASED COMPENSATION

Washington REIT maintains short-term and long-term 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. There were no options issued or outstanding as of December 31, 2016 and 2015. Prior to the adoption of the 2016 Omnibus Incentive Plan, stock based awards to officers, non-officer employees and trustees were issued under the Washington Real Estate Investment Trust 2007 Omnibus Long-Term Incentive Plan which allowed for awards in the form of restricted shares, restricted share units, options and other awards up to an aggregate of 2,000,000 shares while the plan was in effect.

Short-Term Incentive Plan ("STIP")

Under the STIP, executive officers earn awards, payable 50% in cash and 50% in restricted shares, based on a percentage of salary and an achievement rating subject to the discretion of the Compensation Committee of the board of trustees in consideration of various performance conditions and other subjective factors during a one-year performance period. With respect to the 50% of the STIP award payable in restricted shares, the restricted shares will vest over a three-year period commencing on the January 1 following the end of the one-year performance period.

The grant date for the 50% of the STIP award payable in restricted shares is the date on which the Compensation Committee approves the STIP awards. We recognize compensation expense on this 50% when the grant date occurs at the end of the one-year period through the three-year vesting period.

Bonuses payable under the short-term incentive plans for non-executive officers and non-officers are payable 100% in cash.

Long-Term Incentive Plan ("LTIP")

Under the LTIP, executive officers earn awards payable, 75% in unrestricted shares and 25% in restricted shares, based on a percentage of salary and the achievement of certain market conditions. LTIP performance is evaluated based 50% on absolute total shareholder return (“TSR”) and 50% on relative TSR over a three-year evaluation period with a new three-year period initiating under the existing plan each year. The officers' total award opportunities under the LTIP stated as a percentage of base salary ranges from 80% to 150% at target level. The unrestricted shares vest immediately at the end of the three-year performance period, and the restricted shares vest over a one-year period commencing on the January 1 following the end of the three-year performance period. In addition, during the transition period from the prior LTIP in 2014, the board of trustees awarded similar transition awards with defined performance periods of one and two years and modified vesting to account for the transition.

We recognize compensation expense ratably (over three years for the 75% unrestricted shares and over four years for the 25%

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restricted shares) based on the grant date fair value, as determined using a Monte Carlo simulation, and regardless of whether the market conditions are achieved and the awards ultimately vest.

We use a binomial model which employs the Monte Carlo method as of the grant date to determine the fair value of the officer LTIP awards. The market condition performance measurement is based on total shareholder return on both an absolute basis (50% weighting) and relative to a defined population of 15 peer companies (50% weighting). The model evaluates the awards for changing total shareholder return over the term of the vesting, on an absolute basis and relative to the peer companies, and uses random simulations that are based on past stock characteristics as well as dividend growth and other factors for Washington REIT and each of the peer companies. The assumptions used to value the officer LTIP awards were as follows:

	2016 Awards		2015 Awards	2014 Awards
Expected volatility (1)	18.2	%	17.2 - 17.5%	23.2	%
Risk-free interest rate (2)	1.32	%	1.0 - 1.1%	0.8	%
Expected term (3)	3 and 4 years		3 and 4 years	3 and 4 years
Share price at grant date	$27.06		$27.66 - $27.76	$24.08

⁽¹⁾ Expected volatility based upon historical volatility of our daily closing share price.

⁽²⁾ Risk-free interest rate based on U.S. treasury constant maturity bonds on the measurement date with a maturity equal to the market condition performance period.

⁽³⁾ Expected term based on the market condition performance period.

The calculated grant date fair value as a percentage of base salary for the officers for the three-year performance period that commenced in 2016 ranged from approximately 38% to 66% for the 50% of the LTIP based on relative TSR and from 17% to 30% for the 50% of the LTIP based on absolute TSR.

The calculated grant date fair value as a percentage of base salary for the officers for the three-year performance period that commenced in 2015 ranged from approximately 40% to 69% for the 50% of the LTIP based on relative TSR and from 13% to 29% for the 50% of the LTIP based on absolute TSR.

The calculated grant date fair value as a percentage of base salary for the officers for the three-year performance period that commenced in 2014 ranged from approximately 42% to 67% for the 50% of the LTIP based on relative TSR and from 24% to 38% for the 50% of the LTIP based on absolute TSR. For the one-year transition awards, the calculated grant date fair value as a percentage of base salary for the officers for the one-year performance period that commenced in 2014 ranged from approximately 11% to 20% for the 50% of the LTIP based on relative TSR and from 10% to 20% for the 50% of the LTIP based on absolute TSR. For the two-year transition awards, the calculated grant date fair value as a percentage of base salary for the officers for the two-year performance period that commenced in 2014 ranged from approximately 23% to 43% for the 50% of the LTIP based on relative TSR and from 16% to 30% for the 50% of the LTIP based on absolute TSR.

Our non-executive officers and other employees earn restricted share unit awards under a new long-term incentive plan for non-executive officers and staff, which became effective on January 1, 2016, based upon various percentages of their salaries and annual performance calculations. The restricted share unit awards vest ratably over three years from December 15 preceding the grant date based upon continued employment. For awards made through 2016, the service inception date precedes the grant date. For these awards, we initially measured compensation expense for awards with performance conditions at fair value at the service inception date based on probability of payout, and we remeasured compensation expense at subsequent reporting dates until all of the award's key terms and conditions are known and the grant date is established. We recognized compensation expense for these awards according to a graded vesting schedule over the four-year requisite service period. During 2016, we amended the LTIP for other officers and other employees. Among the changes to the LTIP was the inclusion of strategic goals with subjective performance criteria. As a result of these changes, the service inception date is the same as the grant date for awards made under the amended LTIP. We recognize compensation expense for these awards according to a graded vesting schedule over the three-year requisite service period.

Restricted share awards made to retirement-eligible employees fully vest on the grant date. Employees are considered retirement-eligible when they are both over the age of 55 and have been employed by Washington REIT for at least 20 years, or over the age of 65. We fully recognize compensation expense for such awards as of the grant date.

Trustee Awards

We award share based compensation to our trustees in the form of restricted shares which vest immediately and are restricted from sale for the period of the trustees' service. The value of share-based compensation for each trustee was $100,000, $100,000 and

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$55,000 for the each of three years ended December 31, 2016, respectively.

Total Compensation Expense

Total compensation expense recognized in the consolidated financial statements for each of the three years ended December 31, 2016 for all share based awards was $3.5 million, $5.1 million and $5.0 million, respectively. The stock-based compensation expense for 2016 and 2015 is net of $0.1 million and $0.6 million, respectively, of capitalized stock-based compensation expense. Capitalized stock-based compensation expense in 2014 was not material.

Restricted Share Awards with Performance and Service Conditions

The activity for the three years ended December 31, 2016 related to our restricted share awards, excluding those subject to market conditions, was as follows:

	Shares		Wtd Avg Grant Fair Value
Unvested at December 31, 2013	129,815		$	27.06
Granted	210,817		23.93
Vested during year	(236,498	)	25.06
Forfeited	(10,467	)	25.80
Unvested at December 31, 2014	93,667		25.22
Granted	251,642		27.80
Vested during year	(212,856	)	27.18
Forfeited	(26,309	)	26.77
Unvested at December 31, 2015	106,144		27.71
Granted	251,694		26.01
Vested during year	(211,771	)	29.21
Forfeited	(38,368	)	26.14
Unvested at December 31, 2016	107,699		26.47

The total fair value of share grants vested for each of the three years ended December 31, 2016 was $6.2 million, $5.8 million and $6.1 million, respectively.

As of December 31, 2016, the total compensation cost related to non-vested share awards not yet recognized was $1.9 million, which we expect to recognize over a weighted average period of 20 months.

Restricted and Unrestricted Shares with Market Conditions

Stock based awards with market conditions under the LTIP were granted in 2016, 2015 and 2014 with fair market values, as determined using a Monte Carlo simulation, as follows (in thousands):

	Grant Date Fair Value
	2016 Awards				2015 Awards				2014 Awards
	Restricted		Unrestricted		Restricted		Unrestricted		Restricted		Unrestricted
Relative TSR	$	182	$	546	$	191	$	634	$	458	$	1,376
Absolute TSR	82		246		76		254		327		921

The unamortized value of these awards with market conditions as of December 31, 2016 was as follows (in thousands):

	2016 Awards				2015 Awards				2014 Awards
	Restricted		Unrestricted		Restricted		Unrestricted		Restricted		Unrestricted
Relative TSR	$	117	$	314	$	83	$	165	$	33	$	—
Absolute TSR	53		142		33		66		19		—

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NOTE 10:OTHER BENEFIT PLANS

We have a Retirement Savings Plan (the “401(k) Plan”), which permits all eligible employees to defer a portion of their compensation in accordance with the Internal Revenue Code. Under the 401(k) Plan, we may make discretionary contributions on behalf of eligible employees. For each of the three years ended December 31, 2016, we made contributions to the 401(k) plan of $0.4 million, $0.5 million and $0.4 million, respectively.

We have adopted non-qualified deferred compensation plans for the officers and members of the board of trustees. The plans allow for a deferral of a percentage of annual cash compensation and trustee fees. The plans are unfunded and payments are to be made out of the general assets of Washington REIT. The deferred compensation liability was $0.9 million and $1.7 million at December 31, 2016 and 2015, respectively.

In November 2005, the board of trustees approved the establishment of a Supplemental Executive Retirement Plan (“SERP”) for the benefit of officers. This is a defined contribution plan under which, upon a participant's termination of employment from Washington REIT for any reason other than discharge for cause, the participant will be entitled to receive a benefit equal to the participant's accrued benefit times the participant's vested interest. We account for this plan in accordance with ASC 710-10 and ASC 320-10, whereby the investments are reported at fair value, and unrealized holding gains and losses are included in earnings. At December 31, 2016 and 2015, the accrued benefit liability was $1.3 million and $1.4 million, respectively. For each of the three years ended December 31, 2016, we recognized current service cost of $0.2 million, $0.3 million and $0.3 million, respectively.

NOTE 11:EARNINGS PER COMMON SHARE

We determine “Basic earnings per share” using the two-class method as our unvested restricted share awards and units have non-forfeitable rights to dividends, and are therefore considered participating securities. We compute basic earnings per share by dividing net income attributable to the controlling interest less the allocation of undistributed earnings to unvested restricted share awards and units by the weighted-average number of common shares outstanding for the period.

We also determine “Diluted earnings per share” as the more dilutive of the two-class method or the treasury stock method with respect to the unvested restricted share awards. We further evaluate any other potentially dilutive securities at the end of the period and adjust the basic earnings per share calculation for the impact of those securities that are dilutive. Our dilutive earnings per share calculation includes the dilutive impact of employee stock options (prior to their expiration at December 31, 2014) based on the treasury stock method and our share based awards with performance conditions prior to the grant date and all market condition awards under the contingently issuable method.

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The computation of basic and diluted earnings per share for the three years ended December 31, 2016 was as follows (in thousands; except per share data):

	Year Ended December 31,
	2016			2015			2014
Numerator:
Income from continuing operations	$	119,288		$	89,187		$	5,070
Net loss attributable to noncontrolling interests	51			553			—
Allocation of undistributed earnings to unvested restricted share awards and units to continuing operations	(310		)	(269		)	5
Adjusted income from continuing operations attributable to the controlling interests	119,029			89,471			5,075
Income from discontinued operations, including gain on sale of real estate, net of taxes	—			—			106,531
Net loss attributable to noncontrolling interests	—			—			38
Allocation of undistributed earnings to unvested restricted share awards and units to discontinued operations	—			—			(322		)
Adjusted income from discontinued operations attributable to the controlling interests	—			—			106,247
Adjusted net income attributable to the controlling interests	$	119,029		$	89,471		$	111,322
Denominator:
Weighted average shares outstanding – basic	72,163			68,177			66,795
Effect of dilutive securities:
Employee stock options and restricted share awards	176			133			42
Weighted average shares outstanding – diluted	72,339			68,310			66,837
Earnings per common share, basic:
Continuing operations	$	1.65		$	1.31		$	0.08
Discontinued operations	—			—			1.59
	$	1.65		$	1.31		$	1.67
Earnings per common share, diluted:
Continuing operations	$	1.65		$	1.31		$	0.08
Discontinued operations	—			—			1.59
	$	1.65		$	1.31		$	1.67
Dividends declared per common share	$	1.20		$	1.20		$	1.20

NOTE 12:RENTALS UNDER OPERATING LEASES

As of December 31, 2016, non-cancelable commercial operating leases provide for minimum rental income were as follows (in thousands):

2017	$	172,783
2018	153,100
2019	141,158
2020	126,193
2021	100,887
Thereafter	327,421
	$	1,021,542

Apartment leases are not included as the terms are generally for one year. Most of these commercial leases increase in future years based on agreed-upon percentages or in some instances, changes in the Consumer Price Index.

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Real estate tax, operating expense and common area maintenance reimbursement income from continuing operations for the three years ended December 31, 2016 was $35.2 million, $34.6 million and $31.6 million, respectively.

NOTE 13:COMMITMENTS AND CONTINGENCIES

Development Commitments

At December 31, 2016, we had no committed contracts outstanding with third parties in connection with our development and redevelopment projects.

Litigation

We are involved from time to time in various legal proceedings, lawsuits, examinations by various tax authorities and claims that have arisen in the ordinary course of business. Management believes that the resolution of any such current matters will not have a material adverse effect on our financial condition or results of operations.

NOTE 14:SEGMENT INFORMATION

We evaluate real estate performance and allocate resources by property type and 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 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.

Real estate rental revenue as a percentage of the total for each of the reportable operating segments in continuing operations for the three years ended December 31, 2016 was as follows:

	Year Ended December 31,
	2016		2015		2014
Office	53	%	57	%	57	%
Multifamily	27	%	22	%	22	%
Retail	20	%	21	%	21	%

The percentage of total income producing real estate assets, at cost, for each of the reportable operating segments in continuing operations as of December 31, 2016 and 2015 was as follows:

	December 31,
	2016		2015
Office	50	%	59	%
Multifamily	33	%	24	%
Retail	17	%	17	%

The accounting policies of each of the segments are the same as those described in note 2.

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.

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The following tables present revenues, net operating income, capital expenditures and total assets for the three years ended December 31, 2016 from these segments, and reconciles net operating income of reportable segments to net income attributable to the controlling interests as reported (in thousands):

	Year Ended December 31, 2016
	Office		Retail		Multifamily		Corporate and Other		Consolidated
Real estate rental revenue	$	165,934	$	61,566	$	85,764	$	—	$	313,264
Real estate expenses	64,405		15,860		34,748		—		115,013
Net operating income	$	101,529	$	45,706	$	51,016	$	—	$	198,251
Depreciation and amortization									(108,406		)
General and administrative									(19,545		)
Casualty gain and real estate impairment (loss), net									676
Acquisition costs									(1,178		)
Interest expense									(53,126		)
Other income									297
Gain on sale of real estate									101,704
Income tax benefit									615
Net income									119,288
Less: Net loss attributable to noncontrolling interests									51
Net income attributable to the controlling interests									$	119,339
Capital expenditures	$	30,337	$	8,821	$	17,936	$	920	$	58,014
Total assets	$	1,104,589	$	352,056	$	762,695	$	34,279	$	2,253,619

	Year Ended December 31, 2015
	Office		Retail		Multifamily		Corporate and Other		Consolidated
Real estate rental revenue	$	174,378	$	63,507	$	68,542	$	—	$	306,427
Real estate expenses	67,228		15,606		29,400		—		112,234
Net operating income	$	107,150	$	47,901	$	39,142	$	—	$	194,193
Depreciation and amortization									(108,935		)
General and administrative									(20,123		)
Real estate impairment									(5,909		)
Acquisition costs									(2,056		)
Interest expense									(59,546		)
Other income									709
Gain on sale of real estate									91,107
Income tax expense									(134		)
Loss on extinguishment of debt									(119		)
Net income									89,187
Less: Net income attributable to noncontrolling interests									553
Net income attributable to the controlling interests									$	89,740
Capital expenditures	$	29,745	$	3,897	$	7,865	$	2,129	$	43,636
Total assets	$	1,265,570	$	354,123	$	529,773	$	41,702	$	2,191,168

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	Year Ended December 31, 2014
	Office		Retail		Multifamily		Corporate and Other		Consolidated
Real estate rental revenue	$	166,116	$	60,263	$	62,258	$	—	$	288,637
Real estate expenses	63,903		14,022		25,770		—		103,695
Net operating income	$	102,213	$	46,241	$	36,488	$	—	$	184,942
Depreciation and amortization									(96,011		)
General and administrative									(19,644		)
Acquisition costs									(5,710		)
Interest expense									(59,785		)
Other income									825
Gain on sale of real estate									570
Income tax expense									(117		)
Discontinued operations:
Income from properties sold or held for sale									546
Gain on sale of real estate									105,985
Net income									111,601
Less: Net income attributable to noncontrolling interests									38
Net income attributable to the controlling interests									$	111,639
Capital expenditures	$	43,128	$	5,496	$	9,186	$	1,719	$	59,529
Total assets	$	1,283,950	$	385,074	$	408,114	$	31,179	$	2,108,317

NOTE 15:SELECTED QUARTERLY FINANCIAL DATA (UNAUDITED)

Unaudited financial data by quarter in each of the years ended December 31, 2016 and 2015 were as follows (in thousands, except for per share data):

	Quarter(1), (2), (3)
	First		Second			Third		Fourth
2016
Real estate rental revenue	$	77,137	$	79,405		$	79,770	$	76,952
Net income	$	2,379	$	31,821		$	79,662	$	5,426
Net income attributable to the controlling interests	$	2,384	$	31,836		$	79,674	$	5,445
Net income per share
Basic	$	0.03	$	0.44		$	1.07	$	0.07
Diluted	$	0.03	$	0.44		$	1.07	$	0.07
2015
Real estate rental revenue	$	74,856	$	74,226		$	78,243	$	79,102
Net income (loss)	$	29,398	$	(2,886	)	$	580	$	62,095
Net income (loss) attributable to the controlling interests	$	29,506	$	(2,546	)	$	647	$	62,133
Net income (loss) per share
Basic	$	0.43	$	(0.04	)	$	0.01	$	0.91
Diluted	$	0.43	$	(0.04	)	$	0.01	$	0.91

⁽¹⁾  With regard to per share calculations, the sum of the quarterly results may not equal full year results due to rounding.

⁽²⁾  The second and third quarters of 2016 include gains on sale of real estate classified as continued operations of $24.1 million and $77.6 million, respectively. The first, second and fourth quarters of 2015 include gains on sale of real estate classified as continuing operations of $30.3 million, $1.5 million and $59.4 million, respectively.

⁽³⁾  The second quarter of 2015 includes a real estate impairment of $5.9 million.

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NOTE 16:SHAREHOLDERS' EQUITY

During the second quarter of 2016, we issued approximately 5.3 million common shares, including 0.7 million shares issued pursuant to the underwriters' over-allotment option, at a price to the public of $28.20 per share. We received net proceeds of approximately $143.4 million.

During the second quarter of 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 and sale of up to $200.0 million of our common shares from time to time. Sales of our common shares are made at market prices prevailing at the time of sale. We use net proceeds from the sale 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 2016, we issued 0.9 million common shares under the Equity Distribution Agreements at a weighted average price of $33.32 per share, raising $29.6 million in net proceeds. We did not issue any shares under the Equity Distribution Agreements during 2015.

The Equity Distribution Agreements replace Washington REIT’s prior sales agency financing agreement ("Prior ATM") with BNY Mellon Capital Markets, LLC, which expired by its terms in June 2015. During 2015 and 2014, Washington REIT issued 0.2 million and 1.1 million common shares, respectively, at a weighted average price of $28.34 and $27.86, respectively, for net proceeds of $5.2 million and $30.7 million, respectively.

We have a dividend reinvestment program, whereby shareholders may use their dividends and optional cash payments to purchase common shares. The common shares sold under this program may either be common shares issued by us or common shares purchased in the open market. Net proceeds under this program are used for general corporate purposes. During the 2016, we issued approximately 23,000 common shares under this program at a weighted average price of $30.98 per share, raising $0.7 million in net proceeds.

NOTE 17:DEFERRED COSTS

As of December 31, 2016 and 2015, deferred leasing costs and deferred leasing incentives were included in prepaid expenses and other assets as follows (in thousands):

	December 31,
	2016						2015
	Gross Carrying Value		Accumulated Amortization		Net		Gross Carrying Value		Accumulated Amortization		Net
Deferred leasing costs	$	58,391	$	22,748	$	35,643	$	59,382	$	22,897	$	36,485
Deferred leasing incentives	21,157		8,061		13,096		18,701		6,066		12,635

Amortization, including write-offs, of deferred leasing costs and deferred leasing incentives from continuing operations for the three years ended December 31, 2016 were as follows (in thousands):

	Year Ended December 31,
	2016		2015		2014
Deferred leasing costs amortization	$	6,076	$	5,983	$	4,699
Deferred leasing incentives amortization	2,994		2,848		1,704

94

SCHEDULE II

VALUATION AND QUALIFYING ACCOUNTS

FOR THE YEARS ENDED DECEMBER 31, 2016, 2015 AND 2014

(IN THOUSANDS)

	Balance at Beginning of Year		Additions Charged to Expenses		Net Deductions (Recoveries)			Balance at End of Year
Allowance for doubtful accounts
2016	$	2,297	$	1,706	$	(1,626	)	$	2,377
2015	$	3,392	$	1,368	$	(2,463	)	$	2,297
2014	$	6,783	$	1,402	$	(4,793	)	$	3,392
Valuation allowance for deferred tax assets
2016	$	5,705	$	—	$	(2,823	)	$	2,882
2015	$	5,714	$	—	$	(9	)	$	5,705
2014	$	5,741	$	—	$	(27	)	$	5,714

95

SCHEDULE III

		Initial Cost (b)				Net Improvements (Retirement) since Acquisition			Gross Amounts at Which Carried at December 31, 2016						Accumulated Depreciation at December 31, 2016
Properties	Location	Land		Buildings and Improvements					Land		Buildings and Improvements		Total (c)				Year of Construction	Date of Acquisition	Net  Rentable Square Feet (e)	Units	Depreciation Life (d)
Multifamily Properties
3801 Connecticut Avenue	Washington, DC	$	420,000	$	2,678,000	$	14,548,000		$	420,000	$	17,226,000	$	17,646,000	$	10,671,000	1951	Jan 1963	178,000	307	30 years
Roosevelt Towers	Virginia	336,000		1,996,000		12,261,000			336,000		14,257,000		14,593,000		9,491,000		1964	May 1965	170,000	191	40 years
Park Adams	Virginia	287,000		1,654,000		11,904,000			287,000		13,558,000		13,845,000		9,444,000		1959	Jan 1969	173,000	200	35 years
The Ashby at McLean	Virginia	4,356,000		17,102,000		22,576,000			4,356,000		39,678,000		44,034,000		23,631,000		1982	Aug 1996	274,000	256	30 years
Walker House Apartments	Maryland	2,851,000		7,946,000		7,157,000			2,851,000		15,103,000		17,954,000		10,751,000		1971	Mar 1996	157,000	212	30 years
Bethesda Hill Apartments	Maryland	3,900,000		13,412,000		13,280,000			3,900,000		26,692,000		30,592,000		17,788,000		1986	Nov 1997	225,000	195	30 years
Bennett Park	Virginia	2,861,000		917,000		80,226,000			4,774,000		79,230,000		84,004,000		31,960,000		2007	Feb 2001	214,000	224	28 years
The Clayborne	Virginia	269,000		—		30,858,000			699,000		30,428,000		31,127,000		13,831,000		2008	Jun 2003	60,000	74	26 years
The Kenmore (a)	Washington, DC	28,222,000		33,955,000		11,422,000			28,222,000		45,377,000		73,599,000		12,152,000		1948	Sep 2008	268,000	374	30 years
The Maxwell	Virginia	12,787,000		—		38,013,000			12,851,000		37,949,000		50,800,000		4,571,000		2014	Jun 2011	139,000	163	30 years
The Paramount	Virginia	8,568,000		38,716,000		2,073,000			8,568,000		40,789,000		49,357,000		5,774,000		1984	Oct 2013	141,000	135	30 years
Yale West (a)	Washington, DC	14,684,000		62,069,000		549,000			14,684,000		62,618,000		77,302,000		6,480,000		2011	Feb 2014	238,000	216	30 years
The Wellington	Virginia	30,548,000		116,563,000		4,137,000			30,548,000		120,700,000		151,248,000		6,325,000		1960	Jul 2015	842,000	711	30 years
Wellington Land Parcel (Trove) (f)	Virginia	15,000,000		—		3,952,000			—		18,952,000		18,952,000		—		n/a	Jul 2015	—	n/a	n/a
Riverside Apartments	Virginia	38,924,000		184,854,000		5,857,000			38,924,000		190,711,000		229,635,000		4,288,000		1971	May 2016	1,266,000	1,222	30 years
Riverside Apartments Land Parcel (f)	Virginia	15,968,000		—		441,000			—		16,409,000		16,409,000		—		n/a	May 2016	—	n/a	n/a
		$	179,981,000	$	481,862,000	$	259,254,000		$	151,420,000	$	769,677,000	$	921,097,000	$	167,157,000			4,345,000	4,480
Office Buildings
1901 Pennsylvania Avenue	Washington, DC	$	892,000	$	3,481,000	$	18,275,000		$	892,000	$	21,756,000	$	22,648,000	$	16,292,000	1960	May 1977	102,000		28 years
515 King Street	Virginia	4,102,000		3,931,000		7,795,000			4,102,000		11,726,000		15,828,000		5,775,000		1966	Jul 1992	75,000		50 years
1220 19th Street	Washington, DC	7,803,000		11,366,000		15,973,000			7,802,000		27,340,000		35,142,000		15,403,000		1976	Nov 1995	103,000		30 years
1600 Wilson Boulevard	Virginia	6,661,000		16,742,000		27,930,000			6,661,000		44,672,000		51,333,000		22,661,000		1973	Oct 1997	169,000		30 years
Silverline Center	Virginia	12,049,000		71,825,000		98,303,000			12,049,000		170,128,000		182,177,000		77,829,000		1972	Nov 1997	546,000		30 years
Courthouse Square	Virginia	—		17,096,000		9,369,000			—		26,465,000		26,465,000		14,252,000		1979	Oct 2000	118,000		30 years
1776 G Street	Washington, DC	31,500,000		54,327,000		7,448,000			31,500,000		61,775,000		93,275,000		29,983,000		1979	Aug 2003	265,000		30 years
Monument II	Virginia	10,244,000		65,205,000		9,115,000			10,244,000		74,320,000		84,564,000		25,520,000		2000	Mar 2007	208,000		30 years
2000 M Street	Washington, DC	—		61,101,000		21,696,000			—		82,797,000		82,797,000		27,776,000		1971	Dec 2007	231,000		30 years
2445 M Street	Washington, DC	46,887,000		106,743,000		6,210,000			46,887,000		112,953,000		159,840,000		36,583,000		1986	Dec 2008	290,000		30 years
925 Corporate Drive	Virginia	4,518,000		24,801,000		1,080,000			4,518,000		25,881,000		30,399,000		8,538,000		2007	Jun 2010	134,000		30 years
1000 Corporate Drive	Virginia	4,897,000		25,376,000		(249,000		)	4,898,000		25,126,000		30,024,000		7,867,000		2009	Jun 2010	136,000		30 years
1140 Connecticut Avenue	Washington, DC	25,226,000		50,495,000		13,123,000			25,226,000		63,618,000		88,844,000		16,015,000		1966	Jan 2011	183,000		30 years
1227 25th Street	Washington, DC	17,505,000		21,319,000		4,507,000			17,505,000		25,826,000		43,331,000		6,998,000		1988	Mar 2011	136,000		30 years
Braddock Metro Center	Virginia	18,817,000		71,250,000		10,978,000			18,818,000		82,227,000		101,045,000		20,104,000		1985	Sep 2011	348,000		30 years
John Marshall II	Virginia	13,490,000		53,024,000		2,841,000			13,490,000		55,865,000		69,355,000		11,536,000		1996	Sep 2011	223,000		30 years
Fairgate at Ballston	Virginia	17,750,000		29,885,000		5,327,000			17,750,000		35,212,000		52,962,000		7,288,000		1988	Jun 2012	143,000		30 years
Army Navy Building (a), (g)	Washington, DC	30,796,000		39,315,000		4,885,000			30,796,000		44,200,000		74,996,000		5,633,000		1912	Mar 2014	108,000		30 years
1775 Eye Street, NW	Washington, DC	48,086,000		51,074,000		7,833,000			48,086,000		58,907,000		106,993,000		7,593,000		1964	May 2014	186,000		30 years
		$	301,223,000	$	778,356,000	$	272,439,000		$	301,224,000	$	1,050,794,000	$	1,352,018,000	$	363,646,000			3,704,000

96

		Initial Cost (b)				Net Improvements (Retirement) since Acquisition		Gross Amounts at Which Carried at December 31, 2016						Accumulated Depreciation at December 31, 2016
Properties	Location	Land		Buildings and Improvements				Land		Buildings and Improvements		Total (c)				Year of Construction	Date of Acquisition	Net  Rentable Square Feet (e)	Units	Depreciation Life (d)
Retail Centers
Takoma Park	Maryland	$	415,000	$	1,084,000	$	332,000	$	415,000	$	1,416,000	$	1,831,000	$	1,194,000	1962	Jul 1963	51,000		50 years
Westminster	Maryland	519,000		1,775,000		9,839,000		519,000		11,614,000		12,133,000		7,614,000		1969	Sep 1972	150,000		37 years
Concord Centre	Virginia	413,000		850,000		5,845,000		413,000		6,695,000		7,108,000		3,414,000		1960	Dec 1973	76,000		33 years
Wheaton Park	Maryland	796,000		857,000		4,740,000		796,000		5,597,000		6,393,000		3,931,000		1967	Sep 1977	74,000		50 years
Bradlee Shopping Center	Virginia	4,152,000		5,383,000		14,205,000		4,152,000		19,588,000		23,740,000		11,579,000		1955	Dec 1984	172,000		40 years
Chevy Chase Metro Plaza	Washington, DC	1,549,000		4,304,000		8,245,000		1,549,000		12,549,000		14,098,000		6,908,000		1975	Sep 1985	50,000		50 years
Shoppes of Foxchase	Virginia	5,838,000		2,979,000		14,868,000		5,838,000		17,847,000		23,685,000		7,298,000		1960	Jun 1994	134,000		50 years
Frederick County Square	Maryland	6,561,000		6,830,000		5,295,000		6,561,000		12,125,000		18,686,000		7,828,000		1973	Aug 1995	227,000		30 years
800 S. Washington Street	Virginia	2,904,000		5,489,000		5,954,000		2,904,000		11,443,000		14,347,000		5,123,000		1951	Jun 1998	46,000		30 years
Centre at Hagerstown	Maryland	13,029,000		25,415,000		2,610,000		13,029,000		28,025,000		41,054,000		13,856,000		2000	Jun 2002	331,000		30 years
Frederick Crossing	Maryland	12,759,000		35,477,000		2,265,000		12,759,000		37,742,000		50,501,000		15,769,000		1999	Mar 2005	295,000		30 years
Randolph Shopping Center	Maryland	4,928,000		13,025,000		1,154,000		4,928,000		14,179,000		19,107,000		5,288,000		1972	May 2006	82,000		30 years
Montrose Shopping Center	Maryland	11,612,000		22,410,000		2,196,000		11,020,000		25,198,000		36,218,000		9,289,000		1970	May 2006	145,000		30 years
Gateway Overlook	Maryland	28,816,000		52,249,000		622,000		29,110,000		52,577,000		81,687,000		16,408,000		2007	Dec 2010	220,000		30 years
Olney Village Center (a)	Maryland	15,842,000		39,133,000		1,970,000		15,842,000		41,103,000		56,945,000		8,252,000		1979	Aug 2011	199,000		30 years
Spring Valley Village (g)	Washington, DC	10,836,000		32,238,000		1,913,000		10,836,000		34,151,000		44,987,000		2,871,000		1941	Oct 2014	78,000		30 years
		$	120,969,000	$	249,498,000	$	82,053,000	$	120,671,000	$	331,849,000	$	452,520,000	$	126,622,000			2,330,000

Total $ 602,173,000 $ 1,509,716,000 $ 613,746,000 $ 573,315,000 $ 2,152,320,000 $ 2,725,635,000 $ 657,425,000 10,379,000 4,480

a) At December 31, 2016, our properties were encumbered by non-recourse mortgage amounts as follows: $32.9 million on The Kenmore, $14.9 million on Olney Village Center, $47.1 million on Yale West, and $49.6 million on The Amy Navy Building (prepaid at par in February 2017). Mortgage amounts exclude premiums and debt loan costs.

b) The purchase cost of real estate investments has been divided between land and buildings and improvements on the basis of management’s determination of the fair values.

c) At December 31, 2016, total land, buildings and improvements are carried at $2,151.4 million for federal income tax purposes.

d) The useful life shown is for the main structure. Buildings and improvements are depreciated over various useful lives ranging from 3 to 50 years.

e) Residential properties are presented in gross square feet.

f) As of December 31, 2016, Washington REIT had under development multifamily properties, the Wellington land parcel (Trove) and Riverside Apartments land parcel. The value not yet placed into service at December 31, 2016 was $19.0 million and $16.4 million, respectively.

g) As of December 31, 2016, Washington REIT had investments in various development and redevelopment projects, including Army Navy Building and Spring Valley Village. The total value of these various projects not yet placed in service is $4.8 million at December 31, 2016.

97

WASHINGTON REAL ESTATE INVESTMENT TRUST AND SUBSIDIARIES

SUMMARY OF REAL ESTATE INVESTMENTS AND ACCUMULATED DEPRECIATION

(IN THOUSANDS)

The following is a reconciliation of real estate assets and accumulated depreciation for the three years ended December 31, 2016 (in thousands):

	Year Ended December 31,
	2016			2015			2014
Real estate assets
Balance, beginning of period	$	2,673,891		$	2,547,188		$	2,289,509
Additions:
Property acquisitions (1)	240,499			162,702			289,140
Improvements (1)	66,840			50,954			98,250
Deductions:
Impairment write-down	—			(5,909		)	—
Write-off of disposed assets	(1,272		)	(3,291		)	(2,857		)
Property sales	(254,323		)	(77,753		)	(126,854		)
Balance, end of period	$	2,725,635		$	2,673,891		$	2,547,188
Accumulated depreciation
Balance, beginning of period	$	692,608		$	640,434		$	611,408
Additions:
Depreciation	88,347			86,536			77,741
Deductions:
Write-off of disposed assets	(486		)	(2,408		)	(2,549		)
Property sales	(123,044		)	(31,954		)	(46,166		)
Balance, end of period	$	657,425		$	692,608		$	640,434

⁽¹⁾ Includes non-cash accruals for capital items and assumed mortgages.

98

EX-12

Exhibit 12

WASHINGTON REAL ESTATE INVESTMENT TRUST

Computation of Ratios

(In thousands)

Earnings to fixed charges ratio:

	Three Months Ended December 31,				Year Ended December 31,
	2016				2016				2015				2014				2013				2012
Income (loss) from continuing operations	$	5,426			$	119,288			$	89,187			$	5,070			$	(193	)		$	7,768
Additions:
Fixed charges:
Interest expense	11,773				53,126				59,546				59,785				63,573				60,627
Capitalized interest	192				668				658				2,142				1,236				1,688
	11,965				53,794				60,204				61,927				64,809				62,315
Deductions:
Capitalized interest	(192		)		(668		)		(658		)		(2,142		)		(1,236		)		(1,688		)
Net loss (income) attributable to noncontrolling interests	19				51				553				38				—				—
Adjusted earnings	$	17,218			$	172,465			$	149,286			$	64,893			$	63,380			$	68,395
Fixed charges (from above)	$	11,965			$	53,794			$	60,204			$	61,927			$	64,809			$	62,315
Ratio of earnings to fixed charges	1.44			(1)	3.21			(1)	2.48			(1)	1.05			(1)	0.98			(2)	1.10

⁽¹⁾ The earnings to fixed charges ratios for the years ended December 31, 2016, 2015 and 2014 include gains on sale of real estate of $101.7 million, $91.1 million and $0.6 million, respectively, classified as continuing operations. Prior to our adoption of Accounting Standards Update 2014-08 effective January1, 2014, gains from the sale of real estate were classified as discontinued operations.

⁽²⁾ Due to the loss from continuing operations, the ratio was less than 1:1. Washington REIT must generate additional earnings of $1.4 million to achieve a ratio of 1:1.

EX-21

Exhibit 21

Entity Name	State of Organization
WRIT Limited Partnership	Delaware
Real Estate Management, Inc.	Maryland
Washington Parking, Inc.	Maryland
WRIT Dulles Station, LLC	Delaware
Washington Metro, Inc.	Maryland
Cascade/Maryland Properties LLC	Washington
Munson Hill Towers, L.L.C.	Virginia
WRIT Frederick Crossing Land, LLC	Delaware
WRIT Frederick Crossing Lease, LLC	Delaware
WRIT Frederick Crossing Associates, Inc.	Maryland
Frederick Crossing Associates, L.C.	Virginia
Frederick Crossing Retail Associates, L.C.	Virginia
SME Rock, LLC	Delaware
SYN-Rock, LLC	Maryland
Trade Rock, LLC	Delaware
SME Rock Manager, Inc.	Delaware
SYN-Rock Manager, Inc.	Delaware
Trade Rock Manager, Inc.	Delaware
WRIT-Kenmore, LLC	Delaware
WRIT-2445 M, LLC	Delaware
WRIT GATEWAY OVERLOOK LLC	Delaware
WRIT 1140 CT LLC	Delaware
WRIT 1227 25th Street LLC	Delaware
650 N. Glebe, LLC	Delaware
WRIT Crimson On Glebe Member LLC	Delaware
WRIT Olney Village Center LLC	Delaware
WRIT Braddock Office LLC	Delaware
WRIT 8283 Greensboro Drive LLC	Delaware
WRIT Braddock Gateway LLC	Delaware
WRIT Fairgate LLC	Delaware
WRIT Yale West LLC	Delaware
WRIT PARAMOUNT LLC	Delaware
WRIT ANC LLC	Delaware
WRIT 1775 EYE STREET LLC	Delaware
WRIT SPRING VALLEY LLC	Delaware
WashREIT Wellington LLC	Delaware
WashREIT OP LLC	Delaware
WashREIT OP Sub DC LLC	Delaware
WashREIT 1901 Pennsylvania Ave Grantor Trust Ownership LLC	Delaware
WashREIT 1901 Pennsylvania Ave Trustee LLC	Delaware
WashREIT Courthouse Square LLC	Delaware
WashREIT 515 King St LLC	Delaware
WashREIT Frederick County Square LLC	Delaware
WashREIT Wellington Apartments LLC	Delaware
WashREIT Monument II LLC	Delaware
WashREIT Park Adams Apartments LLC	Delaware
WashREIT Roosevelt Towers LLC	Delaware
WashREIT Randolph Shopping Center LLC	Delaware
WashREIT Takoma Park Shopping Center LLC	Delaware

Entity Name	State of Organization
WashREIT Wheaton Park Shopping Center LLC	Delaware
WashREIT Centre at Hagerstown LLC	Delaware
WashREIT Westminster Shopping Center LLC	Delaware
WashREIT Shoppes at Foxchase LLC	Delaware
WashREIT Bradlee Shopping Center LLC	Delaware
WashREIT Chevy Chase Metro Center Grantor Trust Ownership LLC	Delaware
WashREIT Chevy Chase Metro Center Trustee LLC	Delaware
WashREIT 1776 G St Grantor Trust Ownership LLC	Delaware
WashREIT 1776 G St Trustee LLC	Delaware
WashREIT 1220 19th St Grantor Trust Ownership LLC	Delaware
WashREIT 1220 19th St Trustee LLC	Delaware
WashREIT 2000 M St Grantor Trust Ownership LLC	Delaware
WashREIT 2000 M St Trustee LLC	Delaware
WashREIT Riverside LLC	Delaware
WashREIT Riverside Apartments LLC	Delaware
WashREIT 3801 Connecticut Ave Trust Ownership LLC	Delaware
WashREIT 3801 Connecticut Ave Trust Trustee LLC	Delaware

EX-23

Exhibit 23

Consent of Independent Registered Public Accounting Firm

We consent to the incorporation by reference in the following Registration Statements:
(1)	Form S-3 No. 333-204623 of Washington Real Estate Investment Trust,
(2)	Form S-3 No. 333-204624 of Washington Real Estate Investment Trust, and
(3)	Form S-8 No. 333-211418 pertaining to the 2016 Omnibus Incentive Plan of Washington Real Estate Investment Trust;
of our reports dated February 21, 2017, with respect to the consolidated financial statements and schedules of Washington Real Estate Investment Trust and Subsidiaries and the effectiveness of internal control over financial reporting of Washington Real Estate Investment Trust and Subsidiaries, included in this Annual Report (Form 10-K) of Washington Real Estate Investment Trust for the year ended December 31, 2016.
/s/ Ernst & Young LLP
McLean, Virginia
February 21, 2017

EX-24

Exhibit 24

POWER OF

ATTORNEY

KNOW ALL MEN BY THESE PRESENTS THAT the undersigned trustees of Washington Real Estate Investment Trust, a Maryland real estate investment trust, do hereby constitute and appoint each of W. DREW HAMMOND and STEPHEN E. RIFFEE, signing singly, the undersigned's true and lawful attorney in fact to sign his or her name to the Annual Report on Form 10-K for the year ended December 31, 2016, under the Securities Exchange Act of 1934, as amended, and to any and all amendments, of said Company, and to cause the same to be filed with the SEC, granting unto said attorneys in fact and each of them full power and authority to do and perform any act and thing necessary and proper to be done in the premises, as fully and to all intents, and purposes as the undersigned could do if personally present, and the undersigned hereby ratify and confirm all that said attorneys in fact or either one of them shall lawfully do or cause to be done by virtue hereof.

Dated:February 8, 2017

/s/ CHARLES T. NASON	/s/ PAUL T. MCDERMOTT
CHARLES T. NASON	PAUL T. MCDERMOTT
/s/ BENJAMIN S. BUTCHER	/s/ THOMAS H. NOLAN
BENJAMIN S. BUTCHER	THOMAS H. NOLAN
/s/ WILLIAM G. BYRNES	/s/ ANTHONY L. WINNS
WILLIAM G. BYRNES	ANTHONY L. WINNS
/s/ EDWARD S. CIVERA
EDWARD S. CIVERA

EX-31.1

Exhibit 31.1

CERTIFICATION

I, Paul T. McDermott, certify that:

1. I have reviewed this annual report on Form 10-K of Washington Real Estate Investment Trust;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant's other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f))for the registrant and have:

a. Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b. Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c. Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d. Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5. The registrant's other certifying officers and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of registrant's board of directors (or persons performing the equivalent functions):

a. All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

b. Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

DATE:	February 21, 2017	/s/ Paul T. McDermott
		Paul T. McDermott
		Chief Executive Officer

EX-31.2

Exhibit 31.2

CERTIFICATION

I, Stephen E. Riffee, certify that:

1. I have reviewed this annual report on Form 10-K of Washington Real Estate Investment Trust;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant's other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f))for the registrant and have:

a. Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b. Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c. Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d. Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5. The registrant's other certifying officers and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of registrant's board of directors (or persons performing the equivalent functions):

a. All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

b. Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

DATE:	February 21, 2017	/s/ Stephen E. Riffee
		Stephen E. Riffee
		Chief Financial Officer
		(Principal Financial Officer)

EX-31.3

Exhibit 31.3

CERTIFICATION

I, W. Drew Hammond, certify that:

1. I have reviewed this annual report on Form 10-K of Washington Real Estate Investment Trust;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant's other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f))for the registrant and have:

a. Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b. Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c. Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d. Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5. The registrant's other certifying officers and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of registrant's board of directors (or persons performing the equivalent functions):

a. All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

b. Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

DATE:	February 21, 2017	/s/ W. Drew Hammond
		W. Drew Hammond
		Chief Accounting Officer and Controller
		(Principal Accounting Officer)

EX-32

Exhibit 32

WRITTEN STATEMENT OF

CHIEF EXECUTIVE OFFICER AND CHIEF FINANCIAL OFFICER

PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

The undersigned, the President and Chief Executive Officer, Chief Financial Officer, and the Vice President - Chief Accounting Officer and Controller of Washington Real Estate Investment Trust (“Washington REIT”), each hereby certifies on the date hereof, that:

(a) the Annual Report on Form 10-K for the year ended December 31, 2016 filed on the date hereof with the Securities and Exchange Commission (the “Report”) fully complies with the requirements of Section 13 (a) or 15(d) of the Securities Exchange Act of 1934; and

(b) the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of Washington REIT.

Dated:	February 21, 2017	/s/ Paul T. McDermott
		Paul T. McDermott
		Chief Executive Officer
Dated:	February 21, 2017	/s/ Stephen E. Riffee
		Stephen E. Riffee
		Chief Financial Officer
		(Principal Financial Officer)
Dated:	February 21, 2017	/s/ W. Drew Hammond
		W. Drew Hammond
		Chief Accounting Officer and Controller
		(Principal Accounting Officer)

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Document And Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2016	Feb. 16, 2017	Jun. 30, 2016
Document and Entity Information [Abstract]
Entity Registrant Name	WASHINGTON REAL ESTATE INVESTMENT TRUST
Entity Central Index Key	0000104894
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-K
Document Period End Date	Dec. 31, 2016
Document Fiscal Year Focus	2016
Document Fiscal Period Focus	FY
Amendment Flag	false
Entity Common Stock, Shares Outstanding		74,711,571
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Public Float			$ 2,304,199,990

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Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Assets
Land	$ 573,315	$ 561,256
Income producing property	2,112,088	2,076,541
Real estate investment property, at cost	2,685,403	2,637,797
Accumulated depreciation and amortization	(657,425)	(692,608)
Net income producing property	2,027,978	1,945,189
Properties under development or held for future development	40,232	36,094
Total real estate held for investment, net	2,068,210	1,981,283
Cash and cash equivalents	11,305	23,825
Restricted cash	6,317	13,383
Rents and other receivables, net of allowance for doubtful accounts of $2,377 and $2,297, respectively	64,319	62,890
Prepaid expenses and other assets	103,468	109,787
Total assets	2,253,619	2,191,168
Liabilities
Notes payable, net	843,084	743,181
Mortgage notes payable, net	148,540	418,052
Lines of credit	120,000	105,000
Accounts payable and other liabilities	46,967	45,367
Dividends payable	22,414	20,434
Advance rents	11,750	12,744
Tenant security deposits	8,802	9,378
Total liabilities	1,201,557	1,354,156
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: 74,606 and 68,191 shares issued and outstanding at December 31, 2016 and 2015, respectively	746	682
Additional paid in capital	1,368,636	1,193,298
Distributions in excess of net income	(326,047)	(357,781)
Accumulated other comprehensive income (loss)	7,611	(550)
Total shareholders’ equity	1,050,946	835,649
Noncontrolling interests in subsidiary	1,116	1,363
Total equity	1,052,062	837,012
Total liabilities and equity	$ 2,253,619	$ 2,191,168

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Consolidated Balance Sheets (Parenthetical) - USD ($) shares in Thousands, $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Statement of Financial Position [Abstract]
Rents and receivables, allowance for doubtful accounts	$ 2,377	$ 2,297
Preferred shares, par value	$ 0.01	$ 0.01
Preferred shares, shares authorized	10,000	10,000
Preferred shares, shares issued	0	0
Preferred shares, shares outstanding	0	0
Shares of beneficial interest, issued	74,606	68,191
Shares of beneficial interest, par value	$ 0.01	$ 0.01
Shares of beneficial interest, authorized	100,000	100,000
Shares of beneficial interest, shares outstanding	74,606	68,191

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Consolidated Statements Of Income - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Revenue
Real estate rental revenue	$ 313,264	$ 306,427	$ 288,637
Expenses
Real estate expenses	115,013	112,234	103,695
Depreciation and amortization	108,406	108,935	96,011
Acquisition costs	1,178	2,056	5,710
Casualty (gain) and real estate impairment loss, net	(676)	5,909	0
General and administrative	19,545	20,123	19,644
Total expenses	243,466	249,257	225,060
Gain on sale of real estate, continuing operations	101,704	91,107	570
Real estate operating income	171,502	148,277	64,147
Other income (expense)
Interest expense	(53,126)	(59,546)	(59,785)
Other income	297	709	825
Loss on extinguishment of debt	0	(119)	0
Income tax benefit (expense)	615	(134)	(117)
Total other income (expense)	(52,214)	(59,090)	(59,077)
Income from continuing operations	119,288	89,187	5,070
Discontinued operations:
Income from operations of properties sold or held for sale	0	0	546
Gain on sale of real estate, discontinued operations	0	0	105,985
Net income	119,288	89,187	111,601
Less: Net loss attributable to noncontrolling interests in subsidiaries	(51)	(553)	(38)
Net income attributable to the controlling interests	$ 119,339	$ 89,740	$ 111,639
Basic net income attributable to the controlling interests per share
Continuing operations	$ 1.65	$ 1.31	$ 0.08
Discontinued operations, including gain on sale of real estate	0.00	0.00	1.59
Net income attributable to the controlling interests per share	1.65	1.31	1.67
Diluted net income attributable to the controlling interests per share
Continuing operations	1.65	1.31	0.08
Discontinued operations, including gain on sale of real estate	0.00	0.00	1.59
Net income attributable to the controlling interests per share	$ 1.65	$ 1.31	$ 1.67
Weighted average shares outstanding – basic	72,163	68,177	66,795
Weighted average shares outstanding – diluted	72,339	68,310	66,837

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Consolidated Statements Of Shareholders' Equity - USD ($) $ in Thousands	Total	Shares Of Beneficial Interest At Par Value [Member]	Additional Paid In Capital [Member]	Distributions In Excess Of Net Income Attributable To The Controlling Interests [Member]	AOCI Attributable to Parent [Member]	Total Shareholders' Equity [Member]	Noncontrolling Interests In Subsidiaries [Member]
Balance, shares at Dec. 31, 2013		66,531,000
Balance at Dec. 31, 2013	$ 759,446	$ 665	$ 1,151,174	$ (396,880)	$ 0	$ 754,959	$ 4,487
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income attributable to the controlling interests	111,639			111,639		111,639
Net loss attributable to noncontrolling interests	(38)						(38)
Distributions to noncontrolling interests	(1,784)						(1,784)
Contributions from noncontrolling interest	9						9
Dividends	(80,277)			(80,277)		(80,277)
Stock issued during period (in shares)		1,125,000
Equity offerings, net of issuance costs	30,690	$ 11	30,679			30,690
Share grants, net of share grant amortization and forfeitures (in shares)		163,000
Share grants, net of share grant amortization and forfeitures	2,544	$ 2	2,542			2,544
Balance, shares at Dec. 31, 2014		67,819,000
Balance at Dec. 31, 2014	822,229	$ 678	1,184,395	(365,518)	0	819,555	2,674
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income attributable to the controlling interests	89,740			89,740		89,740
Net loss attributable to noncontrolling interests	(553)
Unrealized gain on interest rate hedges	(550)				(550)	(550)
Net loss attributable to noncontrolling interests and deconsolidation of noncontrolling interest	(1,316)						(1,316)
Contributions from noncontrolling interest	5						5
Dividends	(82,003)			(82,003)		(82,003)
Stock issued during period (in shares)		184,000
Equity offerings, net of issuance costs	5,215	$ 2	5,213			5,215
Share grants, net of share grant amortization and forfeitures (in shares)		188,000
Share grants, net of share grant amortization and forfeitures	3,692	$ 2	3,690			3,692
Balance, shares at Dec. 31, 2015		68,191,000
Balance at Dec. 31, 2015	837,012	$ 682	1,193,298	(357,781)	(550)	835,649	1,363
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative Effect of New Accounting Principle in Period of Adoption	(35)			(35)		(35)
Net income attributable to the controlling interests	119,339			119,339		119,339
Net loss attributable to noncontrolling interests	(51)						(51)
Unrealized gain on interest rate hedges	8,161				8,161	8,161
Distributions to noncontrolling interests	(196)						(196)
Dividends	(87,570)			(87,570)		(87,570)
Stock issued during period (in shares)		6,223,000
Equity offerings, net of issuance costs	172,936	$ 62	172,874			172,936
Shares issued under Dividend Reinvestment Program (in shares)		23,000
Shares issued under Dividend Reinvestment Program	700	$ 700	700			700
Share grants, net of share grant amortization and forfeitures (in shares)		169,000
Share grants, net of share grant amortization and forfeitures	1,766	$ 2	1,764			1,766
Balance, shares at Dec. 31, 2016		74,606,000
Balance at Dec. 31, 2016	$ 1,052,062	$ 746	$ 1,368,636	$ (326,047)	$ 7,611	$ 1,050,946	$ 1,116

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Consolidated Statements Of Cash Flows $ in Thousands	12 Months Ended
	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
Cash flows from operating activities
Net income	$ 119,288	$ 89,187	$ 111,601
Adjustments to reconcile net income to net cash provided by operating activities:
Gain on sale of real estate	(101,704)	(91,107)	(106,555)
Depreciation and amortization, including amounts in discontinued operations	108,406	108,935	96,011
Provision for losses on accounts receivable	1,706	1,368	1,402
Deferred tax benefit	(698)	0	0
Casualty (gain) and real estate impairment loss, net	(676)	5,909	0
Share-based compensation expense	3,491	5,112	4,995
Amortization of debt premiums, discounts and related financing costs	3,187	3,486	3,588
Loss on extinguishment of debt, net	0	119	0
Changes in other assets	(13,507)	(10,388)	(23,306)
Changes in other liabilities	(2,562)	(3,195)	(4,619)
Net cash provided by operating activities	116,931	109,426	83,117
Cash flows from investing activities
Real estate acquisitions, net	(227,413)	(151,682)	(194,536)
Capital improvements to real estate	(57,094)	(41,507)	(57,810)
Development in progress	(22,572)	(31,203)	(43,264)
Net cash received from sale of real estate	243,624	137,014	190,864
Cash released from (held in) replacement reserve escrows	4,860	(3,511)	(1,417)
Insurance proceeds	883	0	0
Non-real estate capital improvements	(920)	(2,129)	(1,719)
Net cash used in investing activities	(58,632)	(93,018)	(107,882)
Cash flows from financing activities
Line of credit borrowings, net	15,000	55,000	50,000
Principal payments – mortgage notes payable	(270,061)	(4,512)	(3,954)
Borrowing under construction loan	0	4,558	20,393
Notes payable repayments	0	(150,000)	(100,000)
Proceeds from dividend reinvestment program	700	0	0
Proceeds from term loan	100,000	150,000	0
Payment of financing costs	(1,590)	(5,095)	(742)
Dividends paid	(85,648)	(61,510)	(80,277)
Contributions from noncontrolling interests	0	5	9
Distributions to noncontrolling interests	(196)	0	(3,454)
Net proceeds from equity offerings	172,936	5,215	30,690
Payment of tax withholdings for restricted share awards	(1,960)	(2,071)	(2,416)
Net cash used in financing activities	(70,819)	(8,410)	(89,751)
Net (decrease) increase in cash and cash equivalents	(12,520)	7,998	(114,516)
Cash and cash equivalents at beginning of year	23,825	15,827	130,343
Cash and cash equivalents at end of year	11,305	23,825	15,827
Supplemental disclosure of cash flow information:
Cash paid for interest, net of capitalized interest expense	51,054	57,179	58,023
Cash paid for income taxes	65	261	156
Change in accrued capital improvements and development costs	(3,788)	(4,229)	(4,154)
Dividends payable	22,414	20,434	0
Mortgage notes payable assumed in connection with the acquisition of real estate	$ 0	$ 0	$ 100,861

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Statement Of Comprehensive Income Statement Of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Statement of Comprehensive Income [Abstract]
Net income	$ 119,288	$ 89,187	$ 111,601
Other comprehensive income (loss):	8,161	(550)	0
Unrealized gain (loss) on interest rate hedges	127,449	88,637	111,601
Less: Net loss attributable to noncontrolling interests in subsidiaries	(51)	(553)	(38)
Comprehensive income attributable to the controlling interests	$ 127,500	$ 89,190	$ 111,639

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Nature Of Business

12 Months Ended

Dec. 31, 2016

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 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. During the three years ended December 31, 2016, we sold our interests in the following properties (in thousands):

Disposition Date	Property	Type	Gain on Sale
May 26, 2016	Dulles Station II (1)	Office	$	527
June 27, 2016	Maryland Office Portfolio Transaction I (2)	Office	23,585
September 22, 2016	Maryland Office Portfolio Transaction II (3)	Office	77,592
		Total 2016	$	101,704
March 20, 2015	Country Club Towers	Multifamily	$	30,277
September 9, 2015	1225 First Street (4)	Multifamily	—
October 21, 2015	Munson Hill Towers	Multifamily	51,395
December 14, 2015	Montgomery Village Center	Retail	7,981
		Total 2015	$	89,653
January 21, 2014	Medical Office Portfolio Transactions III & IV (5)	Medical Office	$	105,985
May 2, 2014	5740 Columbia Road	Retail	570
		Total 2014	$	106,555

⁽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.

⁽⁴⁾ Interest in land held for future development.

⁽⁵⁾ Medical Office Portfolio Transactions III & IV consist of Woodburn Medical Park I and II and Prosperity Medical Center I, II and III.

The taxable gains for Dulles Station II and the properties included in Maryland Office Portfolio Transaction I were distributed to shareholders through the quarterly dividends. The properties included in Maryland Office Portfolio Transaction II were identified for a reverse deferred exchange under Section 1031 of the Internal Revenue Code. We acquired the replacement property, Riverside Apartments, during the second quarter of 2016 (see note 3, under "Acquisition"). We reinvested a portion of the Medical Office Portfolio Transactions III and IV, Country Club Towers, Munson Hill Towers and Montgomery Village Center sales proceeds in replacement properties through deferred tax exchanges.

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. During the second quarter of 2016, we recognized an income tax benefit of $0.7 million from a reduction of the valuation allowance for a deferred tax asset at one of our taxable REIT subsidiaries. As of December 31, 2016, our TRSs had deferred tax assets of $0.5 million, net of a valuation allowance of $2.9 million. The valuation allowance for deferred tax assets had a net decrease of $2.8 million during 2016. Our TRSs had no net deferred tax assets as of December 31, 2015. As of December 31, 2016 and 2015, our TRSs had deferred tax liabilities of $0.4 million and $0.7 million, respectively. These deferred tax liabilities are primarily related to temporary differences in the timing of the recognition of revenue, amortization and depreciation.

The following is a breakdown of the taxable percentage of our dividends for these years ended December 31, 2016, 2015 and 2014 (unaudited):

	2016		2015		2014
Ordinary income	66	%	78	%	40	%
Return of capital	33	%	22	%	52	%
Qualified dividends	—	%	—	%	—	%
Unrecaptured Section 1250 gain	1	%	—	%	8	%
Capital gain	—	%	—	%	—	%

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Accounting Policies

12 Months Ended

Dec. 31, 2016

Accounting Policies [Abstract]

Summary of Significant Accounting Policies

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES AND BASIS OF PRESENTATION

Principles of Consolidation and Basis of Presentation

The accompanying audited 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 properties for which there is a noncontrolling interest. All intercompany balances and transactions have been eliminated in consolidation.

We have prepared the accompanying audited consolidated financial statements pursuant to the rules and regulations of the Securities and Exchange Commission.

Use of Estimates in the Financial Statements

The preparation of financial statements in conformity with Generally Accepted Accounting Principles ("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.

Recent Accounting Pronouncements

In January 2017, the Financial Accounting Standards Board (the "FASB") issued Accounting Standards Update No. 2017-01, Business Combinations (Topic 805) - Clarifying the Definition of a Business,which adds guidance to assist entities with evaluating whether transactions should be accounted for as acquisitions of assets or businesses. Under the new guidance, a set of transferred assets and activities is not a business when substantially all of the fair value of the gross assets acquired is concentrated in a single identifiable asset or group of similar identifiable assets. If a set of transferred assets and activities does not meet this threshold, then an entity must evaluate whether the set meets the requirement that a business include, at a minimum, an input and a substantive process that together significantly contribute to the ability to create outputs. The new standard is effective for public entities for fiscal years beginning after December 15, 2017 and for interim periods therein. Early adoption of the standard is allowed for transactions that have not been reported in financial statements issued prior to the new standards issuance date. Prior to the new guidance, we accounted for acquisitions of operating properties as business combinations, but generally expect that future acquisitions of operating properties will be accounted for as asset acquisitions under the new guidance. Acquisition costs are capitalized in asset acquisitions but expensed in business combinations. Identifiable assets, liabilities assumed and any noncontrolling interests are recognized and measured as of the acquisition date at fair value in a business combination, but are measured by allocating the cost of the acquisition on a relative fair value basis in an asset acquisition.

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 March 2016, the FASB issued Accounting Standards Update No. 2016-09, Improvements to Employee Share-Based Payment Accounting ("ASU 2016-09"),which amends existing accounting standards for employee share-based payments, including by allowing an employer to make a policy election to account for forfeitures as they occur or to continue to provide for an estimate as currently required. ASU 2016-09 also allows an employer to withhold shares in a net settlement in an amount that does not exceed the maximum statutory tax rate in the employees' tax jurisdiction without causing liability classification, and clarifies that all cash payments made to taxing authorities on the employees' behalf for withheld shares should be presented as financing activities on the consolidated statements of cash flows. ASU 2016-09 is effective for public entities for fiscal years beginning after December 15, 2016 and for interim periods therein with early adoption permitted. We adopted ASU 2016-09 as of December 31, 2016 and elected to account for forfeitures as they occur. In accordance with ASU 2016-09, we used the modified retrospective transition method for this election, resulting in a charge to retained earnings of less than $0.1 million. Regarding the cash payments made to taxing authorities on the employees' behalf for withheld shares, we had previously presented such payments as operating activities on our consolidated statements of cash flows, and have applied this change retrospectively. The impact of the implementation of ASU 2016-09 on our consolidated statements of cash flows is as follows (in thousands):

	Year Ended December 31,
	2016			2015			2014
Net cash provided by operating activities (prior to adoption of ASU 2016-09)	$	114,971		$	107,355		$	80,701
Reclassification of cash payments for withheld shares	1,960			2,071			2,416
Net cash provided by operating activities (after adoption of ASU 2016-09)	$	116,931		$	109,426		$	83,117
Net cash used in financing activities (prior to adoption of ASU 2016-09)	$	(68,859	)	$	(6,339	)	$	(87,335	)
Reclassification of cash payments for withheld shares	(1,960		)	(2,071		)	(2,416		)
Net cash used in financing activities (after adoption of ASU 2016-09)	$	(70,819	)	$	(8,410	)	$	(89,751	)

In February 2016, the FASB issued Accounting Standards Update No. 2016-05, Derivatives and Hedging (Topic 815), which clarifies that a change in the counterparty to a derivative instrument that has been designated as the hedging instrument under Topic 815, in and of itself, does not require dedesignation of that hedging relationship provided that all other hedging criteria continue to be met. The new standard is effective for public entities for fiscal years beginning after December 15, 2016 and for interim periods therein with early adoption permitted. We do not expect the new standard to have a material impact 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 February 2015, the FASB issued Accounting Standards Update No. 2015-02, Consolidation (Topic 810), which changes the analysis an entity must perform to determine whether it should consolidate certain types of legal entities. Specifically, the new standard i) modifies the evaluation of whether limited partnerships and similar legal entities are variable interest entities ("VIEs") or voting interest entities, ii) eliminates the presumption that a general partner should consolidate a limited partnership and iii) affects the consolidation analysis of reporting entities that are involved with VIEs, particularly those that have fee arrangements and related party relationships. The new standard is effective for public entities for fiscal years beginning after December 15, 2015 and for interim periods therein. We adopted the new standard on January 1, 2016, and the provisions of the new standard did not have any impact on the consolidation of our legal entities.

In August 2014, the FASB issued ASU No. 2014-15, Presentation of Financial Statements - Going Concern (Subtopic 205-40), which provides guidance on management's responsibility to evaluate whether there is substantial doubt about an entity's ability to continue as a going concern and to provide related footnote disclosures. Under the new standard, if conditions or events raise substantial doubt about an entity's ability to continue as a going concern, and substantial doubt is not alleviated after consideration of management's plans, an entity should include a statement in the footnotes indicating that there is substantial doubt about the entity's ability to continue as a going concern. The new standard is effective for fiscal years ending after December 15, 2016 and for annual and interim periods thereafter. We adopted the new standard during the fourth quarter of 2016 and the adoption did not require any disclosures about our ability to continue as a going concern.

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 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, Leases (Topic 842), 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 No. 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.

Revenue Recognition

We lease multifamily properties under operating leases with terms of generally one year or less. We lease commercial properties (our office and retail segments) under operating leases with an average term of seven years. Substantially all commercial leases contain fixed escalations or, in some instances, changes based on the Consumer Price Index, which occur at specified times during the term of the lease. We recognize rental income and rental abatements from our multifamily and commercial leases when earned on a straight-line basis over the lease term. Recognition of rental income commences when control of the leased space has been given to the tenant.

We recognize sales of real estate at closing only when sufficient down payments have been obtained, possession and other attributes of ownership have been transferred to the buyer and we have no significant continuing involvement.

We recognize cost reimbursement income from pass-through expenses on an accrual basis over the periods in which the expenses were incurred. Pass-through expenses are comprised of real estate taxes, operating expenses and common area maintenance costs which are reimbursed by tenants in accordance with specific allowable costs per tenant lease agreements.

Parking revenues are derived from leases, monthly parking agreements and transient parking. We recognize parking revenues from leases on a straight-line basis over the lease term and other parking revenues as earned.

Accounts Receivable and Allowance for Doubtful Accounts

Accounts receivable primarily represents amounts accrued and unpaid from tenants in accordance with the terms of the respective leases, subject to our revenue recognition policy. We review receivables monthly and establish reserves when, in the opinion of management, collection of the receivable is doubtful. We establish reserves for tenants whose rent payment histories or financial conditions cast doubt upon the tenants’ abilities to perform under their lease obligations. When we determine the collection of a receivable to be doubtful in the same quarter that we established the receivable, we recognize the allowance for that receivable as an offset to real estate revenues. When we determine a receivable that was initially established in a prior quarter to be doubtful, we recognize the allowance as an operating expense in Real estate expenses in the consolidated statements of income. In addition to rents due currently, accounts receivable include amounts representing minimal rental income accrued on a straight-line basis to be paid by tenants over the remaining term of their respective leases.

Our accounts receivable balances include $2.4 million and $3.9 million of notes receivable as of December 31, 2016 and 2015, respectively.

Debt Issuance Costs

We amortize external debt issuance costs using the effective interest rate method or the straight-line method which approximates the effective interest rate method, over the estimated life of the related debt. We record debt issuance costs related to notes and mortgage notes, net of amortization, on our consolidated balance sheets as an offset to their related debt. We record debt issuance costs related to revolving lines of credit on our consolidated balance sheets with Prepaid expenses and other assets, regardless of whether a balance on the line of credit is outstanding. We record the amortization of all debt issuance costs as interest expense.

Deferred Leasing Costs

We capitalize and amortize costs associated with the successful negotiation of leases, both external commissions and internal direct costs, on a straight-line basis over the terms of the respective leases. We record the amortization of deferred leasing costs in Depreciation and amortization on the consolidated statements of income. If an applicable lease terminates prior to the expiration of its initial lease term, we write off the carrying amount of the costs to amortization expense.

We capitalize and amortize against revenue leasing incentives associated with the successful negotiation of leases on a straight-line basis over the terms of the respective leases. We record the amortization of deferred leasing incentives as a reduction of revenue. If an applicable lease terminates prior to the expiration of its initial lease term, we write off the carrying amount of the costs as a reduction of revenue.

Real Estate and Depreciation

We depreciate buildings on a straight-line basis over estimated useful lives ranging from 28 to 50 years. We capitalize all capital improvements associated with replacements, improvements or major repairs to real property that extend its useful life and depreciate them using the straight-line method over their estimated useful lives ranging from 3 to 30 years. We also capitalize costs incurred in connection with our development projects, including capitalizing interest incurred on borrowing obligations and other internal costs during periods in which qualifying expenditures have been made and activities necessary to get the development projects ready for their intended use are in progress. Capitalization of these costs begin when the activities and related expenditures commence and cease when the project is substantially complete and ready for its intended use, at which time the project is placed in service and depreciation commences. In addition, we capitalize tenant leasehold improvements when certain criteria are met, including when we supervise construction and will own the improvements. We depreciate all tenant improvements over the shorter of the useful life of the improvements or the term of the related tenant lease.

Real estate depreciation expense from continuing operations was $84.1 million, $80.7 million, $71.4 million during the years ended December 31, 2016, 2015 and 2014, respectively.

We charge maintenance and repair costs that do not extend an asset’s useful life to expense as incurred.

Interest expense and interest capitalized to real estate assets related to development and major renovation activities for the three years ended December 31, 2016 were as follows (in thousands):

	Year Ended December 31,
	2016			2015			2014
Total interest incurred	$	53,794		$	60,204		$	61,927
Capitalized interest	(668		)	(658		)	(2,142		)
Interest expense, net of capitalized interest	$	53,126		$	59,546		$	59,785

We recognize impairment losses on long-lived assets used in operations, development assets or land held for future development, if indicators of impairment are present and the net undiscounted cash flows estimated to be generated by those assets are less than the assets' carrying amount and estimated undiscounted cash flows associated with future development expenditures. If such carrying amount is in excess of the estimated undiscounted cash flows from the operation and disposal of the property, we would recognize an impairment loss equivalent to an amount required to adjust the carrying amount to its estimated fair value, calculated in accordance with current GAAP fair value provisions. Assets held for sale are recorded at the lower of cost or fair value less costs to sell.

We record acquired or assumed assets, including physical assets and in-place leases, and liabilities, based on their fair values. We determine the fair values of acquired buildings on an “as-if-vacant” basis considering a variety of factors, including the replacement cost of the property, estimated rental and absorption rates, estimated future cash flows and valuation assumptions consistent with current market conditions. We determine the fair value of land acquired based on comparisons to similar properties that have been recently marketed for sale or sold.

The fair value of in-place leases consists of the following components – (a) the estimated cost to us to replace the leases, including foregone rents during the period of finding a new tenant and foregone recovery of tenant pass-throughs (referred to as “absorption cost”); (b) the estimated cost of tenant improvements, and other direct costs associated with obtaining a new tenant (referred to as “tenant origination cost”); (c) estimated leasing commissions associated with obtaining a new tenant (referred to as “leasing commissions”); (d) the above/at/below market cash flow of the leases, determined by comparing the projected cash flows of the leases in place, including consideration of renewal options, to projected cash flows of comparable market-rate leases (referred to as “net lease intangible”); and (e) the value, if any, of customer relationships, determined based on our evaluation of the specific characteristics of each tenant’s lease and our overall relationship with the tenant (referred to as “customer relationship value”). We have attributed no value to customer relationships as of December 31, 2016 and 2015.

We discount the amounts used to calculate net lease intangibles using an interest rate which reflects the risks associated with the leases acquired. We classify tenant origination costs as Income producing property on our consolidated balance sheets and amortize the tenant origination costs as depreciation expense on a straight-line basis over the remaining life of the underlying leases. We classify leasing commissions and absorption costs as other assets and amortize leasing commissions and absorption costs as amortization expense on a straight-line basis over the remaining life of the underlying leases. We classify net lease intangible assets as other assets and amortize them on a straight-line basis as a decrease to real estate rental revenue over the remaining term of the underlying leases. We classify net lease intangible liabilities as other liabilities and amortize them on a straight-line basis as an increase to real estate rental revenue over the remaining term of the underlying leases. If any of the fair value of below market lease intangibles includes fair value associated with a renewal option, such amounts are not amortized until the renewal option is executed, else the related value is expensed at that time. Should a tenant terminate its lease, we accelerate the amortization of the unamortized portion of the tenant origination cost, leasing commissions, absorption costs and net lease intangible associated with that lease, over its new, shorter term.

Balances, net of accumulated depreciation or amortization, as appropriate, of the components of the fair value of in-place leases at December 31, 2016 and 2015 were as follows (in thousands):

	December 31,
	2016						2015
	Gross Carrying Value		Accumulated Amortization		Net		Gross Carrying Value		Accumulated Amortization		Net
Tenant origination costs	$	54,352	$	44,823	$	9,529	$	55,664	$	41,138	$	14,526
Leasing commissions/absorption costs	101,311		86,210		15,101		97,678		75,014		22,664
Net lease intangible assets	18,903		14,193		4,710		19,655		12,434		7,221
Net lease intangible liabilities	33,687		25,359		8,328		34,027		23,444		10,583
Below-market ground lease intangible asset	12,080		1,714		10,366		12,080		1,524		10,556

Amortization of these combined components during the three years ended December 31, 2016, 2015 and 2014 was as follows (in thousands):

	Year Ended December 31,
	2016		2015		2014
Depreciation and amortization expense	$	17,655	$	22,244	$	19,854
Real estate rental revenue, net	410		538		456
	$	18,065	$	22,782	$	20,310

Amortization of these combined components over the next five years is projected to be as follows (in thousands):

	Depreciation and amortization expense		Real estate rental revenue, net decrease (increase)			Total
2017	$	8,874	$	(148	)	$	8,726
2018	6,096		(633		)	5,463
2019	3,572		(525		)	3,047
2020	2,357		(320		)	2,037
2021	1,411		(313		)	1,098

Discontinued Operations

We classify properties as held for sale when they meet the necessary criteria, which include: (a) senior management commits to and actively embarks upon a plan to sell the assets, (b) the sale is expected to be completed within one year under terms usual and customary for such sales and (c) actions required to complete the plan indicate that it is unlikely that significant changes to the plan will be made or that the plan will be withdrawn. We generally consider that a property has met these criteria when a sale of the property has been approved by the board of trustees, or a committee with authorization from the board of trustees, there are no known significant contingencies related to the sale and management believes it is probable that the sale will be completed within one year. Depreciation on these properties is discontinued at the time they are classified as held for sale, but operating revenues, operating expenses and interest expense continue to be recognized until the date of sale.

Under ASU No. 2014-08, Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity, which we adopted as of January 1, 2014, revenues and expenses of properties that are either sold or classified as held for sale are presented as discontinued operations for all periods presented in the consolidated statements of income if the dispositions represent a strategic shift that has (or will have) a major effect on our operations and financial results. Interest on debt that can be identified as specifically attributed to these properties is included in discontinued operations. If the dispositions do not represent a strategic shift that has (or will have) a major effect on our operations and financial results, then the revenues and expenses of the properties that are classified as sold or held for sale are presented as continuing operations in the consolidated statements of income for all periods presented. The provisions of ASU No. 2014-08 apply only to properties classified as held for sale or sold after our adoption date of January 1, 2014.

Segments

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.

Cash and Cash Equivalents

Cash and cash equivalents include cash and commercial paper with original maturities of 90 days or less. We maintain cash deposits with financial institutions that at times exceed applicable insurance limits. We reduce this risk by maintaining such deposits with high quality financial institutions that management believes are credit-worthy.

Restricted Cash

Restricted cash includes funds escrowed for tenant security deposits, real estate tax, insurance and mortgage escrows and escrow deposits required by lenders on certain of our properties to be used for future building renovations or tenant improvements.

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” under the two-class method with respect to the unvested restricted share awards. We further evaluate any other potentially dilutive securities at the end of the period and adjust the basic earnings per share calculation for the impact of those securities that are dilutive. Our dilutive earnings per share calculation includes the dilutive impact of employee stock options based on the treasury stock method and our performance share units under the contingently issuable method.

Stock Based Compensation

We currently maintain equity based compensation plans for trustees, officers and employees.

We recognize compensation expense for service-based share awards ratably over the period from the service inception date through the vesting period based on the fair market value of the shares on the date of grant. If an award's service inception date precedes the grant date, we initially measure compensation expense for awards with performance conditions at fair value at the service inception date based on probability of payout, and we remeasure compensation expense at subsequent reporting dates until all of the award’s key terms and conditions are known and the grant date is established. We amortize awards with performance conditions using the graded expense method. We measure compensation expense for awards with market conditions based on the grant date fair value, as determined using a Monte Carlo simulation, and we amortize the expense ratably over the requisite service period, regardless of whether the market conditions are achieved and the awards ultimately vest. Compensation expense for the trustee grants, which fully vest immediately, is fully recognized upon issuance based upon the fair market value of the shares on the date of grant.

Accounting for Uncertainty in Income Taxes

We can recognize a tax benefit only if it is “more likely than not” that a particular tax position will be sustained upon examination or audit. To the extent that the “more likely than not” standard has been satisfied, the benefit associated with a tax position is measured as the largest amount that is greater than 50% likely of being recognized upon settlement. As of December 31, 2016 and 2015, we did not have any unrecognized tax benefits. We do not believe that there will be any material changes to our uncertain tax positions over the next twelve months.

We are subject to federal income tax as well as income tax of the states of Maryland and Virginia, and the District of Columbia. However, as a REIT, we generally are not subject to income tax on our taxable income to the extent it is distributed as dividends to our shareholders.

Tax returns filed for 2012 through 2016 tax years are subject to examination by taxing authorities. We classify interest and penalties related to uncertain tax positions, if any, in our financial statements as a component of general and administrative expense.

Derivatives

We borrow funds at a combination of fixed and variable rates. Borrowings under our revolving credit facility and term loans bear interest at variable rates. Our interest rate risk management objectives are to minimize interest rate fluctuation on long-term indebtedness and limit the impact of interest rate changes on earnings and cash flows. To achieve these objectives, from time to time, we may enter into interest rate hedge contracts such as collars, swaps, caps and treasury lock agreements in order to mitigate our interest rate risk with respect to various debt instruments. We generally do not hold or issue these derivative contracts for trading or speculative purposes. The interest rate swaps we enter into are recorded at fair value on a recurring basis. We assess effectiveness of our cash flow hedges both at inception and on an ongoing basis. The effective portion of changes in fair value of the interest rate swaps associated with our cash flow hedges is recorded in accumulated other comprehensive income (loss). Our cash flow hedges become ineffective if critical terms of the hedging instrument and the debt instrument such as notional amounts, settlement dates, reset dates, calculation period and LIBOR do not perfectly match. In addition, we evaluate the default risk of the counterparty by monitoring the creditworthiness of the counterparty. When ineffectiveness of a cash flow hedge exists, the ineffective portion of changes in fair value of the interest rate swaps associated with our cash flow hedges is recognized in earnings in the period affected.

Reclassifications

In prior years, we elected to present our real estate expenses on the consolidated statements of income disaggregated into the following categories: utilities, real estate taxes, repairs and maintenance, property administration and management, operating services and common area maintenance and other real estate expenses. There is no requirement under GAAP or applicable Securities and Exchange Commission rules to present real estate expenses in a disaggregated manner. In the interest of presenting our financial results in a more direct and concise manner, we have elected to aggregate our real estate expenses on our consolidated statements of income. Prior year amounts have been reclassified to conform with current year presentation as follows (in thousands):

	Year Ended December 31,
	2015		2014
Utilities	$	18,004	$	18,056
Real estate taxes	37,152		33,436
Repairs and maintenance	14,095		13,375
Property administration and management	23,099		20,460
Operating services and common area maintenance	15,974		15,068
Other real estate expenses	3,910		3,300
Real estate expenses	$	112,234	$	103,695

Also in prior years, we included income tax benefit (expense) in general and administrative costs on our consolidated statements of income because the amounts of our income tax benefit (expense) were not material. Due to the income tax benefit of $0.7 million we recognized during the second quarter of 2016 (see note 1), we have elected to present income tax benefit (expense) as a separate line item. Income tax expense of $0.1 million for each of the years ended December 31, 2015 and 2014 have been reclassified out of general and administrative expenses in order to conform with current year presentation.

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Real Estate Investments

12 Months Ended

Dec. 31, 2016

Real Estate [Abstract]

Real Estate Investment

REAL ESTATE

As of December 31, 2016 and 2015, our real estate investment portfolio, at cost, consists of properties as follows (in thousands):

	December 31,
	2016		2015
Office	$	1,349,378	$	1,554,334
Multifamily	885,084		641,424
Retail	450,941		442,039
	$	2,685,403	$	2,637,797

Our results of operations are dependent on the overall economic health of our markets, tenants and the specific segments in which we own properties. These segments include office, retail and multifamily. All segments are affected by external economic factors, such as inflation, consumer confidence and unemployment rates, as well as changing tenant and consumer requirements.

As of December 31, 2016, one property, Riverside Apartments, accounted for more than 10% of total assets. No single property or tenant accounted for more than 10% of the real estate rental revenue.

We have properties under development/redevelopment and held for current or future development as of December 31, 2016 and 2015. In the office segment, we had a redevelopment project to renovate Silverline Center, an office property in Tysons, Virginia. We completed major construction activities on this project during the second quarter of 2015, and placed into service substantially completed portions of the project at the time totaling $25.9 million, with the remaining components placed into service as of March 31, 2016. We also currently 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 December 31, 2016, we had invested $2.2 million in the redevelopment.

In the multifamily segment, we have Trove, a multifamily development adjacent to The Wellington, and own land held for future multifamily development adjacent to Riverside Apartments. As of December 31, 2016, we had invested $19.0 million and $16.4 million, including the costs of acquired land, in 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 Shopping Center. As of December 31, 2016, we had invested $1.1 million in the redevelopment.

The cost of our real estate portfolio under development or held for future development as of December 31, 2016 and 2015 is as follows (in thousands):

	December 31,
	2016		2015
Office	$	2,640	$	18,711
Multifamily	36,013		16,307
Retail	1,579		1,076
	$	40,232	$	36,094

Acquisitions

Our current strategy is to recycle legacy assets that lack the income growth potential we seek and to invest in high-quality assets with compelling value-add returns through redevelopment opportunities in our existing portfolio and acquisitions that meet our stringent investment criteria. We focus on properties inside the Washington metro region’s Beltway, near major transportation nodes and in areas with strong employment drivers and superior growth demographics.

Properties and land for development acquired during the three years ended December 31, 2016 were as follows:

Acquisition Date	Property	Type	# of units (unaudited)	Rentable Square  Feet (unaudited)	Contract Purchase  Price (in thousands)
May 20, 2016	Riverside Apartments	Multifamily	1,222	N/A	$	244,750
July 1, 2015	The Wellington	Multifamily	711	N/A	$	167,000
February 21, 2014	Yale West	Multifamily	216	N/A	$	73,000
March 26, 2014	The Army Navy Building	Office	N/A	108,000	79,000
May 1, 2014	1775 Eye Street, NW	Office	N/A	185,000	104,500
October 1, 2014	Spring Valley Retail Center	Retail	N/A	75,000	40,500
		Total 2014	216	368,000	$	297,000

The results of operations from acquired operating properties are included in the consolidated statements of income as of their acquisition dates.

The revenue and earnings of our acquisitions during their year of acquisition for the three years ended December 31, 2016 are as follows (in thousands):

	Year Ended December 31,
	2016			2015			2014
Real estate rental revenue	$	13,112		$	6,797		$	16,260
Net loss	(1,688		)	(2,748		)	(3,168		)

As discussed in note 2, we record the acquired physical assets (land, building and tenant improvements), in-place leases (absorption, tenant origination costs, leasing commissions, and net lease intangible assets/liabilities), and any other liabilities at their fair values.

We have recorded the total purchase price of the above acquisitions as follows (in thousands):

	2016			2015		2014
Land	$	38,924		$	30,548	$	104,403
Land held for development	15,968			15,000		—
Buildings	184,854			116,563		172,671
Tenant origination costs	—			—		9,377
Leasing commissions/absorption costs	4,992			4,889		16,474
Net lease intangible assets	22			—		7,331
Net lease intangible liabilities	(10		)	—		(8,323		)
Fair value of assumed mortgage	—			—		(107,125		)
Furniture, fixtures & equipment	—			—		932
Total	$	244,750		$	167,000	$	195,740

The weighted remaining average life for 2016 acquisition components above, other than land and building, are 87 months for net lease intangible assets and 43 months for net lease intangible liabilities. The leasing commissions/absorption costs acquired in 2016 were substantially amortized as of December 31, 2016, as such costs were primarily related to assumed apartment leases. The net lease intangible assets and liabilities are associated with leases for retail space at Riverside Apartments.

The difference in the total contract price of $244.8 million for the 2016 acquisition and cash paid for the acquisition per the consolidated statements of cash flows of $227.4 million is primarily due to acquisition of land for development of $16.0 million and credits received at settlement totaling $1.4 million.

The difference in the total contract price of $167.0 million for the 2015 acquisition and cash paid for the acquisition per the consolidated statements of cash flows of $151.7 million is primarily due to acquisition of land for development of $15.0 million and credits received at settlement totaling $0.3 million.

The difference in the total contract price of $297.0 million for the 2014 acquisitions and cash paid for the acquisitions per the consolidated statements of cash flows of $194.5 million is primarily due to the assumption of two mortgage notes secured by Yale West and The Army Navy Building for an aggregate carrying value of $100.9 million and the payment of a $3.6 million deposit for Yale West in 2013, partially offset by a credit to the seller for building renovations at 1775 Eye Street, NW for $1.9 million.

The following unaudited pro-forma combined condensed statements of operations set forth the consolidated results of operations for the years ended December 31, 2016 and 2015 as if the above described acquisition in 2016 had occurred on January 1, 2015. The pro forma adjustments exclude acquisition costs directly related to the above-described acquisition. The unaudited pro-forma information does not purport to be indicative of the results that actually would have occurred if the acquisition had been in effect for the years ended December 31, 2016 and 2015. The unaudited data presented is in thousands, except per share data.

	Year Ended December 31,
	2016		2015
Real estate revenues	$	321,386	$	327,605
Net income	$	127,439	$	90,040
Diluted earnings per share	$	1.76	$	1.31

Noncontrolling Interests in Subsidiaries

In August 2007, we acquired a 0.8 acre parcel of land located at 4661 Kenmore Avenue, Alexandria, Virginia for future medical office development. The acquisition was funded by issuing operating partnership units in an operating partnership, which is a consolidated subsidiary of Washington REIT. This resulted in a noncontrolling ownership interest in this property based upon defined company operating partnership units at the date of purchase. In November 2013, 4661 Kenmore Avenue was sold as part of the Medical Office Portfolio (see "Properties Sold ") and in 2014, we distributed to the noncontrolling interest holder their share of the proceeds.

Variable Interest Entities

In November 2011, we executed a joint venture operating agreement with a real estate development company to develop a high-rise multifamily property at 1225 First Street in Alexandria, Virginia. Washington REIT and the real estate development company owned 95% and 5% of the joint venture, respectively. During the second quarter of 2015, we determined that we would not develop the property and began negotiations to sell our interest in the joint venture. We recognized a $5.9 million impairment charge for the second quarter of 2015 in order to reduce the carrying value of the property to its estimated fair value. We based this fair value on the contract sale price in the purchase and sale agreement. This fair valuation falls into Level 2 of the fair value hierarchy. During the third quarter of 2015, we sold our 95% interest in the joint venture for a contract sale price of $14.5 million and deconsolidated the entity, as this joint venture had previously been consolidated as Washington REIT was the primary beneficiary of the VIE.

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 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 90.0% owner of the joint venture. The real estate development company owns 10.0% 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. As of December 31, 2015, $32.2 million was outstanding on The Maxwell's construction loan. 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 loan became an intercompany payable from the consolidated VIE to Washington REIT that is eliminated in consolidation.

We include joint venture land acquisitions and related capitalized development costs on our consolidated balance sheets in properties under development or held for future development until placed in service or sold. The Maxwell was placed into service during the fourth quarter of 2014 and first quarter of 2015. As of December 31, 2016 and 2015, The Maxwell's assets were as follows (in thousands):

	December 31,
	2016			2015
Land	$	12,851		$	12,851
Income producing property	37,949			37,791
Accumulated depreciation and amortization	(4,571		)	(2,347		)
Other assets	456			1,188
	$	46,685		$	49,483

As of December 31, 2016 and 2015, The Maxwell's liabilities were as follows (in thousands):

	December 31,
	2016			2015
Mortgage notes payable, net	$	31,869	(1)	$	32,214
Accounts payable and other liabilities	186			256
Tenant security deposits	99			82
	$	32,154		$	32,552

⁽¹⁾ The mortgage notes payable balance as of December 31, 2016 is eliminated in consolidation due to the purchase of the loan by Washington REIT in January 2016.

Properties Sold

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. There were no properties held for sale as of December 31, 2016 or 2015.

During the second quarter of 2016, we sold Dulles Station, Phase II, which consists of land held for future development and an interest in a parking garage in Herndon, Virginia, for $12.1 million. Also during the second quarter of 2016, we executed two purchase and sale agreements with a single buyer for the sale of a portfolio of six office properties located in Maryland: 6110 Executive Boulevard, Wayne Plaza, 600 Jefferson Plaza, West Gude Drive, 51 Monroe Street and One Central Plaza (collectively, the "Maryland Office Portfolio") for an aggregate contract sales price of $240.0 million. We closed on the first sale transaction in June 2016 and closed on the second sale transaction in September 2016.

During the second quarter of 2015, 15,000 square feet of land at Montrose Shopping Center, a retail property in Rockville, Maryland, was condemned as part of an eminent domain taking action. The taken land was at the periphery of the property and its taking did not impact the property's operations. We received $2.0 million as compensation for the taken land, and recognized a $1.4 million gain on sale of real estate during the second quarter of 2015.

We sold our interests in the following properties during the three years ended December 31, 2016:

Disposition Date	Property	Segment	# of units (unaudited)	Rentable Square Feet (unaudited)	Contract Sales Price (in thousands)		Gain on Sale (in thousands)
May 26, 2016	Dulles Station, Phase II (1)	Office	N/A	N/A	$	12,100	$	527
June 27, 2016	Maryland Office Portfolio Transaction I (2)	Office	N/A	692,000	111,500		23,585
September 22, 2016	Maryland Office Portfolio Transaction II (3)	Office	N/A	491,000	128,500		77,592
		Total 2016		1,183,000	$	252,100	$	101,704
March 20, 2015	Country Club Towers	Multifamily	227	N/A	$	37,800	$	30,277
September 9, 2015	1225 First Street (4)	Multifamily	N/A	N/A	14,500		—
October 21, 2015	Munson Hill Towers	Multifamily	279	N/A	57,050		51,395
December 14, 2015	Montgomery Village Center	Retail	N/A	197,000	27,750		7,981
		Total 2015	506	197,000	$	137,100	$	89,653
January 21, 2014	Medical Office Portfolio Transactions III & IV (5)	Medical Office	N/A	427,000	$	193,561	$	105,985
May 2, 2014	5740 Columbia Road	Retail	N/A	3,000	1,600		570
		Total 2014	N/A	430,000	$	195,161	$	106,555

⁽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.

⁽⁴⁾  Interest in land held for future development.

⁽⁵⁾   These properties are classified as discontinued operations. All other sold properties are classified as continuing operations.

We do not have significant continuing involvement in the operations of the disposed properties.

While the Maryland Office Portfolio, in the aggregate, constitutes an individually significant disposition, it 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 years endedDecember 31, 2016 are as follows:

	Year Ending December 31,
	2016		2015		2014
Real estate rental revenue	$	20,266	$	32,423	$	31,811
Net income	9,376		9,848		9,352

In September 2013, we entered into fourseparate purchase and sale agreements to effectuate the sale of our entire medical office segment (including land held for development at 4661 Kenmore Avenue) and two office buildings (Woodholme Center and 6565 Arlington Boulevard) for an aggregate purchase price of $500.8 million. The sale was structured as four transactions. Transactions I & II closed in November 2013 and Transactions III & IV in January 2014.

The impact of the sale of our medical office segment on revenues and net income is summarized as follows (in thousands, except per share data):

	Year Ending December 31,
	2016		2015		2014
Real estate revenues	$	—	$	—	$	892
Net income	—		—		546
Basic and diluted net income per share	—		—		0.01

Income from properties classified as discontinued operations for the three years ended December 31, 2016 was as follows (in thousands):

	Year Ending December 31,
	2016		2015		2014
Revenues	$	—	$	—	$	892
Property expenses	—		—		(346		)
	$	—	$	—	$	546

Casualty Gains

We recorded a net casualty gain of $0.7 million during the second quarter of 2016 associated with a fire at Bethesda Hill Towers that damaged four units, which is included in casualty (gain) and real estate impairment loss, net on our consolidated statements of income. The net casualty gain is comprised of $0.9 million in third-party insurance proceeds received by us, which were partially offset by casualty charges of $0.2 million to write off the net book value of the damaged units at Bethesda Hill Towers.

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Mortgage Notes Payable

12 Months Ended

Dec. 31, 2016

Notes Payable, Noncurrent [Abstract]

Mortgage Notes Payable

MORTGAGE NOTES PAYABLE

As of December 31, 2016 and 2015, we had outstanding mortgage notes payable, each collateralized by one or more buildings and related land from our portfolio, as follows (in thousands):

				December 31,
Properties	Assumption/Issuance Date (1)	Effective Interest Rate (2)		2016			2015			Payoff Date/Maturity Date
Army Navy Building (3)	3/26/2014	3.18	%	$	49,618		$	50,750		2/1/2017
Yale West (4)	2/21/2014	3.75	%	47,078			47,502			1/31/2022
The Maxwell (5)	2/21/2013	2.27	%	—			32,248			1/27/2016
John Marshall II (6)	9/15/2011	5.79	%	—			51,011			2/8/2016
Olney Village Center	8/30/2011	4.94	%	14,851			16,503			10/1/2023
Kenmore Apartments	2/2/2009	5.37	%	32,938			33,637			3/1/2019
2445 M Street (7)	12/2/2008	7.25	%	—			101,866			10/6/2016
3801 Connecticut Avenue, Walker House and Bethesda Hill (8)	5/29/2008	5.71	%	—			81,029			6/1/2016
				144,485			414,546
Premiums and discounts, net				4,354			4,175
Debt issuance costs, net				(299		)	(669		)
				$	148,540		$	418,052

⁽¹⁾ Each of these mortgages was assumed with the acquisition of the collateralized properties, except for the mortgage notes secured by 3801 Connecticut Avenue, Walker House, Bethesda Hill, Kenmore Apartments, and the construction loan secured by the development project at The Maxwell, which were originally executed by Washington REIT. We record mortgages assumed in an acquisition at fair value.

⁽²⁾ Yield on the assumption/issuance date, including the effects of any premiums, discounts or fair value adjustments on the notes.

⁽³⁾ The note was prepaid without penalty in February 2017.

⁽⁴⁾ The maturity date of the mortgage note is January 1, 2052, but can be prepaid, without penalty, beginning on January 31, 2022.

⁽⁵⁾ Interest rate on The Maxwell construction loan was variable, based on LIBOR plus 2.0%. Interest and principal was payable monthly starting March 2016 until the extended maturity date of February 20, 2017, upon which all unpaid principal and interest were payable in full. In January 2016, Washington REIT exercised its right to purchase the construction loan without penalty from the lender (see note 3, under "Variable Interest Entities").

⁽⁶⁾ The note was prepaid without penalty in February 2016.

⁽⁷⁾ Interest only was payable monthly until the note was prepaid without penalty in October 2016.

⁽⁸⁾ Interest only was payable monthly until the note was repaid without penalty in June 2016.

Except as noted above, principal and interest are payable monthly until the maturity date, upon which all unpaid principal and interest are payable in full.

Total carrying amount of the above mortgaged properties was $280.4 million and $619.4 million at December 31, 2016 and 2015, respectively.

Scheduled principal payments subsequent to December 31, 2016 are as follows (in thousands):

2017	$	52,571
2018	3,135
2019	33,909
2020	2,659
2021	2,829
Thereafter	49,382
	$	144,485

In February 2017, we prepaid without penalty the remaining $49.6 million of the mortgage note secured by the Army Navy Building using borrowings on our 2016 Term Loan.

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Unsecured Lines Of Credit Payable

12 Months Ended

Dec. 31, 2016

Unsecured Debt [Abstract]

Unsecured Lines Of Credit Payable

UNSECURED LINES OF CREDIT PAYABLE

During the second quarter of 2015, we terminated our $100.0 million unsecured line of credit maturing in June 2015 and our $400.0 million unsecured line of credit maturing in July 2016, and executed a new $600.0 million unsecured credit agreement ("Revolving Credit Facility") that matures in June 2019, unless extended pursuant to one or both of the twosix-month extension options. The Revolving Credit Facility has an accordion feature 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 amount of the Revolving Credit Facility unused and available at December 31, 2016 was as follows (in thousands):

Committed capacity	$	600,000
Borrowings outstanding	(120,000		)
Unused and available	$	480,000

We executed borrowings and repayments on the Revolving Credit Facility during 2016 as follows (in thousands):

Balance at December 31, 2015	$	105,000
Borrowings	651,000
Repayments	(636,000		)
Balance at December 31, 2016	$	120,000

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% 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 0.5% and the one month LIBOR market index rate plus 1.0%. As of December 31, 2016, the interest rate on the facility is one month LIBOR plus 1.0% and the one month LIBOR was 0.77%.

All outstanding advances for the Revolving Credit Facility are due and payable upon maturity in June 2019, unless extended pursuant to one or both of the two six-month extension options. Interest only payments are due and payable generally on a monthly basis. 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 December 31, 2016, the facility fee is 0.20%.

For the three years ended December 31, 2016, we recognized interest expense (excluding facility fees) and facility fees as follows (in thousands):

	Year Ended December 31,
	2016		2015		2014
Interest expense (excluding facility fees)	$	3,272	$	2,266	$	196
Facility fees	1,220		1,241		1,267

The Revolving Credit Facility contains certain financial and non-financial covenants, all of which we have met as of December 31, 2016 and 2015. Included in these covenants are limits on our total indebtedness, secured and unsecured indebtedness and required debt service payments.

Information related to revolving credit facilities for the three years ended December 31, 2016 as follows (in thousands, except percentage amounts):

	Year Ended December 31,
	2016			2015			2014
Total revolving credit facilities at December 31	$	600,000		$	600,000		$	500,000
Borrowings outstanding at December 31	120,000			105,000			50,000
Weighted average daily borrowings during the year	214,962			167,573			12,849
Maximum daily borrowings during the year	358,000			350,000			55,000
Weighted average interest rate during the year	1.52		%	1.35		%	1.53		%
Weighted average interest rate on borrowings outstanding at December 31	1.64		%	1.36		%	1.37		%

The covenants under our Revolving Credit Facility require us to insure our properties against loss or damage in amounts customarily maintained by similar businesses or as they may be required by applicable law. The covenants for the notes require us to keep all of our insurable properties insured against loss or damage at least equal to their then full insurable value. We have an insurance policy that has no terrorism exclusion, except for non-certified nuclear, chemical and biological acts of terrorism. Our financial condition and results of operations are subject to the risks associated with acts of terrorism and the potential for uninsured losses as the result of any such acts. Effective November 26, 2002, under this existing coverage, any losses caused by certified acts of terrorism would be partially reimbursed by the United States under a formula established by federal law. Under this formula, the United States pays 85% of covered terrorism losses exceeding the statutorily established deductible paid by the insurance provider, and insurers pay 10% until aggregate insured losses from all insurers reach $100 billion in a calendar year. If the aggregate amount of insured losses under this program exceeds $100 billion during the applicable period for all insured and insurers combined, then each insurance provider will not be liable for payment of any amount which exceeds the aggregate amount of $100 billion. On January 12, 2015, the Terrorism Risk Insurance Program Reauthorization Act of 2015 was signed into law and extended the program through December 31, 2020.

NOTES PAYABLE

Our unsecured notes outstanding as of December 31, 2016 were as follows (in thousands):

	Coupon/Stated Rate		Effective Rate (1)		Principal Amount			Maturity Date (2)
10 Year Unsecured Notes	4.95	%	5.05	%	$	250,000		10/1/2020
2015 Term Loan	1 Month LIBOR + 110 basis points		2.72	%	150,000			3/15/2021
10 Year Unsecured Notes	3.95	%	4.02	%	300,000			10/15/2022
2016 Term Loan	1 Month LIBOR + 165 basis points		2.86	%	100,000			7/21/2023
30 Year Unsecured Notes	7.25	%	7.36	%	50,000			2/25/2028
Total principal					850,000
Premiums and discounts, net					(1,971		)
Deferred issuance costs, net					(4,945		)
Total					$	843,084

⁽¹⁾ For fixed rate notes, the effective rate represents the yield on issuance date, including the effects of discounts on the notes. For variable rate notes, the effective rate represents the rate as fixed by interest rate derivatives (see note 7).

⁽²⁾ No principal amounts are due prior to maturity.

During the third quarter of 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 the daily one-month LIBOR rate 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 subsequent to the end of 2016. We also entered into forward interest rate derivatives commencing on March 31, 2017 to effectively fix the interest rate on the 2016 Term Loan at 2.86% (see note 7).

The required principal payments as of December 31, 2016 are as follows (in thousands):

2017	$	—
2018	—
2019	—
2020	250,000
2021	150,000
Thereafter	450,000
	$	850,000

Interest on these notes is payable semi-annually, except for the term loans, for which interest is payable monthly. These notes contain certain financial and non-financial covenants, all of which we have met as of December 31, 2016. Included in these covenants is the requirement to maintain a minimum level of unencumbered assets, as well as limits on our total indebtedness, secured indebtedness and required debt service payments.

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Notes Payable

12 Months Ended

Dec. 31, 2016

Notes Payable [Abstract]

Notes Payable

UNSECURED LINES OF CREDIT PAYABLE

During the second quarter of 2015, we terminated our $100.0 million unsecured line of credit maturing in June 2015 and our $400.0 million unsecured line of credit maturing in July 2016, and executed a new $600.0 million unsecured credit agreement ("Revolving Credit Facility") that matures in June 2019, unless extended pursuant to one or both of the twosix-month extension options. The Revolving Credit Facility has an accordion feature 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 amount of the Revolving Credit Facility unused and available at December 31, 2016 was as follows (in thousands):

Committed capacity	$	600,000
Borrowings outstanding	(120,000		)
Unused and available	$	480,000

We executed borrowings and repayments on the Revolving Credit Facility during 2016 as follows (in thousands):

Balance at December 31, 2015	$	105,000
Borrowings	651,000
Repayments	(636,000		)
Balance at December 31, 2016	$	120,000

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% 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 0.5% and the one month LIBOR market index rate plus 1.0%. As of December 31, 2016, the interest rate on the facility is one month LIBOR plus 1.0% and the one month LIBOR was 0.77%.

All outstanding advances for the Revolving Credit Facility are due and payable upon maturity in June 2019, unless extended pursuant to one or both of the two six-month extension options. Interest only payments are due and payable generally on a monthly basis. 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 December 31, 2016, the facility fee is 0.20%.

For the three years ended December 31, 2016, we recognized interest expense (excluding facility fees) and facility fees as follows (in thousands):

	Year Ended December 31,
	2016		2015		2014
Interest expense (excluding facility fees)	$	3,272	$	2,266	$	196
Facility fees	1,220		1,241		1,267

The Revolving Credit Facility contains certain financial and non-financial covenants, all of which we have met as of December 31, 2016 and 2015. Included in these covenants are limits on our total indebtedness, secured and unsecured indebtedness and required debt service payments.

Information related to revolving credit facilities for the three years ended December 31, 2016 as follows (in thousands, except percentage amounts):

	Year Ended December 31,
	2016			2015			2014
Total revolving credit facilities at December 31	$	600,000		$	600,000		$	500,000
Borrowings outstanding at December 31	120,000			105,000			50,000
Weighted average daily borrowings during the year	214,962			167,573			12,849
Maximum daily borrowings during the year	358,000			350,000			55,000
Weighted average interest rate during the year	1.52		%	1.35		%	1.53		%
Weighted average interest rate on borrowings outstanding at December 31	1.64		%	1.36		%	1.37		%

The covenants under our Revolving Credit Facility require us to insure our properties against loss or damage in amounts customarily maintained by similar businesses or as they may be required by applicable law. The covenants for the notes require us to keep all of our insurable properties insured against loss or damage at least equal to their then full insurable value. We have an insurance policy that has no terrorism exclusion, except for non-certified nuclear, chemical and biological acts of terrorism. Our financial condition and results of operations are subject to the risks associated with acts of terrorism and the potential for uninsured losses as the result of any such acts. Effective November 26, 2002, under this existing coverage, any losses caused by certified acts of terrorism would be partially reimbursed by the United States under a formula established by federal law. Under this formula, the United States pays 85% of covered terrorism losses exceeding the statutorily established deductible paid by the insurance provider, and insurers pay 10% until aggregate insured losses from all insurers reach $100 billion in a calendar year. If the aggregate amount of insured losses under this program exceeds $100 billion during the applicable period for all insured and insurers combined, then each insurance provider will not be liable for payment of any amount which exceeds the aggregate amount of $100 billion. On January 12, 2015, the Terrorism Risk Insurance Program Reauthorization Act of 2015 was signed into law and extended the program through December 31, 2020.

NOTES PAYABLE

Our unsecured notes outstanding as of December 31, 2016 were as follows (in thousands):

	Coupon/Stated Rate		Effective Rate (1)		Principal Amount			Maturity Date (2)
10 Year Unsecured Notes	4.95	%	5.05	%	$	250,000		10/1/2020
2015 Term Loan	1 Month LIBOR + 110 basis points		2.72	%	150,000			3/15/2021
10 Year Unsecured Notes	3.95	%	4.02	%	300,000			10/15/2022
2016 Term Loan	1 Month LIBOR + 165 basis points		2.86	%	100,000			7/21/2023
30 Year Unsecured Notes	7.25	%	7.36	%	50,000			2/25/2028
Total principal					850,000
Premiums and discounts, net					(1,971		)
Deferred issuance costs, net					(4,945		)
Total					$	843,084

⁽¹⁾ For fixed rate notes, the effective rate represents the yield on issuance date, including the effects of discounts on the notes. For variable rate notes, the effective rate represents the rate as fixed by interest rate derivatives (see note 7).

⁽²⁾ No principal amounts are due prior to maturity.

During the third quarter of 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 the daily one-month LIBOR rate 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 subsequent to the end of 2016. We also entered into forward interest rate derivatives commencing on March 31, 2017 to effectively fix the interest rate on the 2016 Term Loan at 2.86% (see note 7).

The required principal payments as of December 31, 2016 are as follows (in thousands):

2017	$	—
2018	—
2019	—
2020	250,000
2021	150,000
Thereafter	450,000
	$	850,000

Interest on these notes is payable semi-annually, except for the term loans, for which interest is payable monthly. These notes contain certain financial and non-financial covenants, all of which we have met as of December 31, 2016. Included in these covenants is the requirement to maintain a minimum level of unencumbered assets, as well as limits on our total indebtedness, secured indebtedness and required debt service payments.

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Derivative Instruments

12 Months Ended

Dec. 31, 2016

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 6) 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 2.86%, 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 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 2016 and 2015 and hedge ineffectiveness did not impact earnings in 2016 and 2015.

The fair values of the interest rate swaps as of December 31, 2016 and 2015, are as follows (in thousands):

	Aggregate Notional Amount		Effective Date		Fair Value
					Asset Derivatives				Liability Derivatives
					December 31,				December 31,
Derivative Instrument				Maturity Date	2016		2015		2016		2015
Interest rate swaps	$	150,000	October 15, 2015	March 15, 2021	$	417	$	—	$	—	$	550
Interest rate swaps	150,000		March 31, 2017	July 21, 2023	7,194		N/A		—		N/A
	$	300,000			$	7,611	$	—	$	—	$	550

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 gains or losses on the effective swaps are recognized in other comprehensive income (loss), as follows (in thousands):

	Year Ending December 31,
	2016		2015			2014
Unrealized gain (loss) on interest rate hedges	$	8,161	$	(550	)	$	—

Amounts reported in accumulated other comprehensive income (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 $1.2 million will be reclassified as a decrease to interest expense.

We have agreements with each of our derivative counterparties that contain a provision whereby we could be declared in default on our derivative obligations if repayment of the underlying indebtedness is accelerated by the lender due to our default on the indebtedness. As of December 31, 2016, the fair values of derivatives were in a net asset position of $7.6 million, including accrued interest but excluding any adjustment for nonperformance risk. As of December 31, 2016, 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.

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Fair Value Disclosures

12 Months Ended

Dec. 31, 2016

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 December 31, 2016 and 2015 that are recorded at fair value on a recurring basis are the assets held in the Supplemental Executive Retirement Plan ("SERP"), which primarily consists 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 December 31, 2016 and 2015 were as follows (in thousands):

	December 31, 2016								December 31, 2015
	Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets:
SERP	$	1,407	$	—	$	1,407	$	—	$	1,408	$	—	$	1,408	$	—
Derivatives	7,611		—		7,611		—		—		—		—		—
Liabilities:
Derivatives	—		—		—		—		550		—		550		—

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 December 31, 2016 may differ significantly from the amounts presented.

Below is a summary of significant methodologies used in estimating fair values and a schedule of fair values at 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 bank facilities 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 December 31, 2016 and 2015, the carrying values and estimated fair values of our financial instruments were as follows (in thousands):

	December 31,
	2016				2015
	Carrying Value		Fair Value		Carrying Value		Fair Value
Cash and cash equivalents	$	11,305	$	11,305	$	23,825	$	23,825
Restricted cash	6,317		6,317		13,383		13,383
2445 M Street note receivable	2,089		2,173		3,849		4,275
Mortgage notes payable	148,540		149,997		418,052		426,693
Lines of credit payable	120,000		120,000		105,000		105,000
Notes payable	843,084		873,516		743,181		753,816

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Stock Based Compensation

12 Months Ended

Dec. 31, 2016

Share-based Compensation [Abstract]

Stock Based Compensation

STOCK BASED COMPENSATION

Washington REIT maintains short-term and long-term 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. There were no options issued or outstanding as of December 31, 2016 and 2015. Prior to the adoption of the 2016 Omnibus Incentive Plan, stock based awards to officers, non-officer employees and trustees were issued under the Washington Real Estate Investment Trust 2007 Omnibus Long-Term Incentive Plan which allowed for awards in the form of restricted shares, restricted share units, options and other awards up to an aggregate of 2,000,000 shares while the plan was in effect.

Short-Term Incentive Plan ("STIP")

Under the STIP, executive officers earn awards, payable 50% in cash and 50% in restricted shares, based on a percentage of salary and an achievement rating subject to the discretion of the Compensation Committee of the board of trustees in consideration of various performance conditions and other subjective factors during a one-year performance period. With respect to the 50% of the STIP award payable in restricted shares, the restricted shares will vest over a three-year period commencing on the January 1 following the end of the one-year performance period.

The grant date for the 50% of the STIP award payable in restricted shares is the date on which the Compensation Committee approves the STIP awards. We recognize compensation expense on this 50% when the grant date occurs at the end of the one-year period through the three-year vesting period.

Bonuses payable under the short-term incentive plans for non-executive officers and non-officers are payable 100% in cash.

Long-Term Incentive Plan ("LTIP")

Under the LTIP, executive officers earn awards payable, 75% in unrestricted shares and 25% in restricted shares, based on a percentage of salary and the achievement of certain market conditions. LTIP performance is evaluated based 50% on absolute total shareholder return (“TSR”) and 50% on relative TSR over a three-year evaluation period with a new three-year period initiating under the existing plan each year. The officers' total award opportunities under the LTIP stated as a percentage of base salary ranges from 80% to 150% at target level. The unrestricted shares vest immediately at the end of the three-year performance period, and the restricted shares vest over a one-year period commencing on the January 1 following the end of the three-year performance period. In addition, during the transition period from the prior LTIP in 2014, the board of trustees awarded similar transition awards with defined performance periods of one and two years and modified vesting to account for the transition.

We recognize compensation expense ratably (over three years for the 75% unrestricted shares and over four years for the 25% restricted shares) based on the grant date fair value, as determined using a Monte Carlo simulation, and regardless of whether the market conditions are achieved and the awards ultimately vest.

We use a binomial model which employs the Monte Carlo method as of the grant date to determine the fair value of the officer LTIP awards. The market condition performance measurement is based on total shareholder return on both an absolute basis (50% weighting) and relative to a defined population of 15 peer companies (50% weighting). The model evaluates the awards for changing total shareholder return over the term of the vesting, on an absolute basis and relative to the peer companies, and uses random simulations that are based on past stock characteristics as well as dividend growth and other factors for Washington REIT and each of the peer companies. The assumptions used to value the officer LTIP awards were as follows:

	2016 Awards		2015 Awards	2014 Awards
Expected volatility (1)	18.2	%	17.2 - 17.5%	23.2	%
Risk-free interest rate (2)	1.32	%	1.0 - 1.1%	0.8	%
Expected term (3)	3 and 4 years		3 and 4 years	3 and 4 years
Share price at grant date	$27.06		$27.66 - $27.76	$24.08

⁽¹⁾ Expected volatility based upon historical volatility of our daily closing share price.

⁽²⁾ Risk-free interest rate based on U.S. treasury constant maturity bonds on the measurement date with a maturity equal to the market condition performance period.

⁽³⁾ Expected term based on the market condition performance period.

The calculated grant date fair value as a percentage of base salary for the officers for the three-year performance period that commenced in 2016 ranged from approximately 38% to 66% for the 50% of the LTIP based on relative TSR and from 17% to 30% for the 50% of the LTIP based on absolute TSR.

The calculated grant date fair value as a percentage of base salary for the officers for the three-year performance period that commenced in 2015 ranged from approximately 40% to 69% for the 50% of the LTIP based on relative TSR and from 13% to 29% for the 50% of the LTIP based on absolute TSR.

The calculated grant date fair value as a percentage of base salary for the officers for the three-year performance period that commenced in 2014 ranged from approximately 42% to 67% for the 50% of the LTIP based on relative TSR and from 24% to 38% for the 50% of the LTIP based on absolute TSR. For the one-year transition awards, the calculated grant date fair value as a percentage of base salary for the officers for the one-year performance period that commenced in 2014 ranged from approximately 11% to 20% for the 50% of the LTIP based on relative TSR and from 10% to 20% for the 50% of the LTIP based on absolute TSR. For the two-year transition awards, the calculated grant date fair value as a percentage of base salary for the officers for the two-year performance period that commenced in 2014 ranged from approximately 23% to 43% for the 50% of the LTIP based on relative TSR and from 16% to 30% for the 50% of the LTIP based on absolute TSR.

Our non-executive officers and other employees earn restricted share unit awards under a new long-term incentive plan for non-executive officers and staff, which became effective on January 1, 2016, based upon various percentages of their salaries and annual performance calculations. The restricted share unit awards vest ratably over three years from December 15 preceding the grant date based upon continued employment. For awards made through 2016, the service inception date precedes the grant date. For these awards, we initially measured compensation expense for awards with performance conditions at fair value at the service inception date based on probability of payout, and we remeasured compensation expense at subsequent reporting dates until all of the award's key terms and conditions are known and the grant date is established. We recognized compensation expense for these awards according to a graded vesting schedule over the four-year requisite service period. During 2016, we amended the LTIP for other officers and other employees. Among the changes to the LTIP was the inclusion of strategic goals with subjective performance criteria. As a result of these changes, the service inception date is the same as the grant date for awards made under the amended LTIP. We recognize compensation expense for these awards according to a graded vesting schedule over the three-year requisite service period.

Restricted share awards made to retirement-eligible employees fully vest on the grant date. Employees are considered retirement-eligible when they are both over the age of 55 and have been employed by Washington REIT for at least 20 years, or over the age of 65. We fully recognize compensation expense for such awards as of the grant date.

Trustee Awards

We award share based compensation to our trustees in the form of restricted shares which vest immediately and are restricted from sale for the period of the trustees' service. The value of share-based compensation for each trustee was $100,000, $100,000 and $55,000 for the each of three years ended December 31, 2016, respectively.

Total Compensation Expense

Total compensation expense recognized in the consolidated financial statements for each of the three years ended December 31, 2016 for all share based awards was $3.5 million, $5.1 million and $5.0 million, respectively. The stock-based compensation expense for 2016 and 2015 is net of $0.1 million and $0.6 million, respectively, of capitalized stock-based compensation expense. Capitalized stock-based compensation expense in 2014 was not material.

Restricted Share Awards with Performance and Service Conditions

The activity for the three years ended December 31, 2016 related to our restricted share awards, excluding those subject to market conditions, was as follows:

	Shares		Wtd Avg Grant Fair Value
Unvested at December 31, 2013	129,815		$	27.06
Granted	210,817		23.93
Vested during year	(236,498	)	25.06
Forfeited	(10,467	)	25.80
Unvested at December 31, 2014	93,667		25.22
Granted	251,642		27.80
Vested during year	(212,856	)	27.18
Forfeited	(26,309	)	26.77
Unvested at December 31, 2015	106,144		27.71
Granted	251,694		26.01
Vested during year	(211,771	)	29.21
Forfeited	(38,368	)	26.14
Unvested at December 31, 2016	107,699		26.47

The total fair value of share grants vested for each of the three years ended December 31, 2016 was $6.2 million, $5.8 million and $6.1 million, respectively.

As of December 31, 2016, the total compensation cost related to non-vested share awards not yet recognized was $1.9 million, which we expect to recognize over a weighted average period of 20 months.

Restricted and Unrestricted Shares with Market Conditions

Stock based awards with market conditions under the LTIP were granted in 2016, 2015 and 2014 with fair market values, as determined using a Monte Carlo simulation, as follows (in thousands):

	Grant Date Fair Value
	2016 Awards				2015 Awards				2014 Awards
	Restricted		Unrestricted		Restricted		Unrestricted		Restricted		Unrestricted
Relative TSR	$	182	$	546	$	191	$	634	$	458	$	1,376
Absolute TSR	82		246		76		254		327		921

The unamortized value of these awards with market conditions as of December 31, 2016 was as follows (in thousands):

	2016 Awards				2015 Awards				2014 Awards
	Restricted		Unrestricted		Restricted		Unrestricted		Restricted		Unrestricted
Relative TSR	$	117	$	314	$	83	$	165	$	33	$	—
Absolute TSR	53		142		33		66		19		—

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Other Benefit Plans

12 Months Ended

Dec. 31, 2016

Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]

Other Benefit Plans

OTHER BENEFIT PLANS

We have a Retirement Savings Plan (the “401(k) Plan”), which permits all eligible employees to defer a portion of their compensation in accordance with the Internal Revenue Code. Under the 401(k) Plan, we may make discretionary contributions on behalf of eligible employees. For each of the three years ended December 31, 2016, we made contributions to the 401(k) plan of $0.4 million, $0.5 million and $0.4 million, respectively.

We have adopted non-qualified deferred compensation plans for the officers and members of the board of trustees. The plans allow for a deferral of a percentage of annual cash compensation and trustee fees. The plans are unfunded and payments are to be made out of the general assets of Washington REIT. The deferred compensation liability was $0.9 million and $1.7 million at December 31, 2016 and 2015, respectively.

In November 2005, the board of trustees approved the establishment of a Supplemental Executive Retirement Plan (“SERP”) for the benefit of officers. This is a defined contribution plan under which, upon a participant's termination of employment from Washington REIT for any reason other than discharge for cause, the participant will be entitled to receive a benefit equal to the participant's accrued benefit times the participant's vested interest. We account for this plan in accordance with ASC 710-10 and ASC 320-10, whereby the investments are reported at fair value, and unrealized holding gains and losses are included in earnings. At December 31, 2016 and 2015, the accrued benefit liability was $1.3 million and $1.4 million, respectively. For each of the three years ended December 31, 2016, we recognized current service cost of $0.2 million, $0.3 million and $0.3 million, respectively.

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Earnings Per Common Share

12 Months Ended

Dec. 31, 2016

Earnings Per Share [Abstract]

Earnings per Common Share

EARNINGS PER COMMON SHARE

We determine “Basic earnings per share” using the two-class method as our unvested restricted share awards and units have non-forfeitable rights to dividends, and are therefore considered participating securities. We compute basic earnings per share by dividing net income attributable to the controlling interest less the allocation of undistributed earnings to unvested restricted share awards and units by the weighted-average number of common shares outstanding for the period.

We also determine “Diluted earnings per share” as the more dilutive of the two-class method or the treasury stock method with respect to the unvested restricted share awards. We further evaluate any other potentially dilutive securities at the end of the period and adjust the basic earnings per share calculation for the impact of those securities that are dilutive. Our dilutive earnings per share calculation includes the dilutive impact of employee stock options (prior to their expiration at December 31, 2014) based on the treasury stock method and our share based awards with performance conditions prior to the grant date and all market condition awards under the contingently issuable method.

The computation of basic and diluted earnings per share for the three years ended December 31, 2016 was as follows (in thousands; except per share data):

	Year Ended December 31,
	2016			2015			2014
Numerator:
Income from continuing operations	$	119,288		$	89,187		$	5,070
Net loss attributable to noncontrolling interests	51			553			—
Allocation of undistributed earnings to unvested restricted share awards and units to continuing operations	(310		)	(269		)	5
Adjusted income from continuing operations attributable to the controlling interests	119,029			89,471			5,075
Income from discontinued operations, including gain on sale of real estate, net of taxes	—			—			106,531
Net loss attributable to noncontrolling interests	—			—			38
Allocation of undistributed earnings to unvested restricted share awards and units to discontinued operations	—			—			(322		)
Adjusted income from discontinued operations attributable to the controlling interests	—			—			106,247
Adjusted net income attributable to the controlling interests	$	119,029		$	89,471		$	111,322
Denominator:
Weighted average shares outstanding – basic	72,163			68,177			66,795
Effect of dilutive securities:
Employee stock options and restricted share awards	176			133			42
Weighted average shares outstanding – diluted	72,339			68,310			66,837
Earnings per common share, basic:
Continuing operations	$	1.65		$	1.31		$	0.08
Discontinued operations	—			—			1.59
	$	1.65		$	1.31		$	1.67
Earnings per common share, diluted:
Continuing operations	$	1.65		$	1.31		$	0.08
Discontinued operations	—			—			1.59
	$	1.65		$	1.31		$	1.67
Dividends declared per common share	$	1.20		$	1.20		$	1.20

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Rentals Under Operating Leases

12 Months Ended

Dec. 31, 2016

Rentals Under Operating Leases [Abstract]

Rentals Under Operating Leases

RENTALS UNDER OPERATING LEASES

As of December 31, 2016, non-cancelable commercial operating leases provide for minimum rental income were as follows (in thousands):

2017	$	172,783
2018	153,100
2019	141,158
2020	126,193
2021	100,887
Thereafter	327,421
	$	1,021,542

Apartment leases are not included as the terms are generally for one year. Most of these commercial leases increase in future years based on agreed-upon percentages or in some instances, changes in the Consumer Price Index.

Real estate tax, operating expense and common area maintenance reimbursement income from continuing operations for the three years ended December 31, 2016 was $35.2 million, $34.6 million and $31.6 million, respectively.

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Commitments and Contingencies

12 Months Ended

Dec. 31, 2016

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

COMMITMENTS AND CONTINGENCIES

Development Commitments

At December 31, 2016, we had no committed contracts outstanding with third parties in connection with our development and redevelopment projects.

Litigation

We are involved from time to time in various legal proceedings, lawsuits, examinations by various tax authorities and claims that have arisen in the ordinary course of business. Management believes that the resolution of any such current matters will not have a material adverse effect on our financial condition or results of operations.

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Segment Information

12 Months Ended

Dec. 31, 2016

Segment Reporting Information, Revenue for Reportable Segment [Abstract]

Segment Information

SEGMENT INFORMATION

We evaluate real estate performance and allocate resources by property type and 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 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.

Real estate rental revenue as a percentage of the total for each of the reportable operating segments in continuing operations for the three years ended December 31, 2016 was as follows:

	Year Ended December 31,
	2016		2015		2014
Office	53	%	57	%	57	%
Multifamily	27	%	22	%	22	%
Retail	20	%	21	%	21	%

The percentage of total income producing real estate assets, at cost, for each of the reportable operating segments in continuing operations as of December 31, 2016 and 2015 was as follows:

	December 31,
	2016		2015
Office	50	%	59	%
Multifamily	33	%	24	%
Retail	17	%	17	%

The accounting policies of each of the segments are the same as those described in note 2.

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 years ended December 31, 2016 from these segments, and reconciles net operating income of reportable segments to net income attributable to the controlling interests as reported (in thousands):

	Year Ended December 31, 2016
	Office		Retail		Multifamily		Corporate and Other		Consolidated
Real estate rental revenue	$	165,934	$	61,566	$	85,764	$	—	$	313,264
Real estate expenses	64,405		15,860		34,748		—		115,013
Net operating income	$	101,529	$	45,706	$	51,016	$	—	$	198,251
Depreciation and amortization									(108,406		)
General and administrative									(19,545		)
Casualty gain and real estate impairment (loss), net									676
Acquisition costs									(1,178		)
Interest expense									(53,126		)
Other income									297
Gain on sale of real estate									101,704
Income tax benefit									615
Net income									119,288
Less: Net loss attributable to noncontrolling interests									51
Net income attributable to the controlling interests									$	119,339
Capital expenditures	$	30,337	$	8,821	$	17,936	$	920	$	58,014
Total assets	$	1,104,589	$	352,056	$	762,695	$	34,279	$	2,253,619

	Year Ended December 31, 2015
	Office		Retail		Multifamily		Corporate and Other		Consolidated
Real estate rental revenue	$	174,378	$	63,507	$	68,542	$	—	$	306,427
Real estate expenses	67,228		15,606		29,400		—		112,234
Net operating income	$	107,150	$	47,901	$	39,142	$	—	$	194,193
Depreciation and amortization									(108,935		)
General and administrative									(20,123		)
Real estate impairment									(5,909		)
Acquisition costs									(2,056		)
Interest expense									(59,546		)
Other income									709
Gain on sale of real estate									91,107
Income tax expense									(134		)
Loss on extinguishment of debt									(119		)
Net income									89,187
Less: Net income attributable to noncontrolling interests									553
Net income attributable to the controlling interests									$	89,740
Capital expenditures	$	29,745	$	3,897	$	7,865	$	2,129	$	43,636
Total assets	$	1,265,570	$	354,123	$	529,773	$	41,702	$	2,191,168

	Year Ended December 31, 2014
	Office		Retail		Multifamily		Corporate and Other		Consolidated
Real estate rental revenue	$	166,116	$	60,263	$	62,258	$	—	$	288,637
Real estate expenses	63,903		14,022		25,770		—		103,695
Net operating income	$	102,213	$	46,241	$	36,488	$	—	$	184,942
Depreciation and amortization									(96,011		)
General and administrative									(19,644		)
Acquisition costs									(5,710		)
Interest expense									(59,785		)
Other income									825
Gain on sale of real estate									570
Income tax expense									(117		)
Discontinued operations:
Income from properties sold or held for sale									546
Gain on sale of real estate									105,985
Net income									111,601
Less: Net income attributable to noncontrolling interests									38
Net income attributable to the controlling interests									$	111,639
Capital expenditures	$	43,128	$	5,496	$	9,186	$	1,719	$	59,529
Total assets	$	1,283,950	$	385,074	$	408,114	$	31,179	$	2,108,317

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Selected Quarterly Financial Data (Unaudited)

12 Months Ended

Dec. 31, 2016

Quarterly Financial Information Disclosure [Abstract]

Selected Quarterly Financial Data (Unaudited)

SELECTED QUARTERLY FINANCIAL DATA (UNAUDITED)

Unaudited financial data by quarter in each of the years ended December 31, 2016 and 2015 were as follows (in thousands, except for per share data):

	Quarter(1), (2), (3)
	First		Second			Third		Fourth
2016
Real estate rental revenue	$	77,137	$	79,405		$	79,770	$	76,952
Net income	$	2,379	$	31,821		$	79,662	$	5,426
Net income attributable to the controlling interests	$	2,384	$	31,836		$	79,674	$	5,445
Net income per share
Basic	$	0.03	$	0.44		$	1.07	$	0.07
Diluted	$	0.03	$	0.44		$	1.07	$	0.07
2015
Real estate rental revenue	$	74,856	$	74,226		$	78,243	$	79,102
Net income (loss)	$	29,398	$	(2,886	)	$	580	$	62,095
Net income (loss) attributable to the controlling interests	$	29,506	$	(2,546	)	$	647	$	62,133
Net income (loss) per share
Basic	$	0.43	$	(0.04	)	$	0.01	$	0.91
Diluted	$	0.43	$	(0.04	)	$	0.01	$	0.91

⁽¹⁾  With regard to per share calculations, the sum of the quarterly results may not equal full year results due to rounding.

⁽²⁾  The second and third quarters of 2016 include gains on sale of real estate classified as continued operations of $24.1 million and $77.6 million, respectively. The first, second and fourth quarters of 2015 include gains on sale of real estate classified as continuing operations of $30.3 million, $1.5 million and $59.4 million, respectively.

⁽³⁾  The second quarter of 2015 includes a real estate impairment of $5.9 million.

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Shareholders' Equity

12 Months Ended

Dec. 31, 2016

Stockholders' Equity Note [Abstract]

Shareholders' Equity

SHAREHOLDERS' EQUITY

During the second quarter of 2016, we issued approximately 5.3 million common shares, including 0.7 million shares issued pursuant to the underwriters' over-allotment option, at a price to the public of $28.20 per share. We received net proceeds of approximately $143.4 million.

During the second quarter of 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 and sale of up to $200.0 million of our common shares from time to time. Sales of our common shares are made at market prices prevailing at the time of sale. We use net proceeds from the sale 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 2016, we issued 0.9 million common shares under the Equity Distribution Agreements at a weighted average price of $33.32 per share, raising $29.6 million in net proceeds. We did not issue any shares under the Equity Distribution Agreements during 2015.

The Equity Distribution Agreements replace Washington REIT’s prior sales agency financing agreement ("Prior ATM") with BNY Mellon Capital Markets, LLC, which expired by its terms in June 2015. During 2015 and 2014, Washington REIT issued 0.2 million and 1.1 million common shares, respectively, at a weighted average price of $28.34 and $27.86, respectively, for net proceeds of $5.2 million and $30.7 million, respectively.

We have a dividend reinvestment program, whereby shareholders may use their dividends and optional cash payments to purchase common shares. The common shares sold under this program may either be common shares issued by us or common shares purchased in the open market. Net proceeds under this program are used for general corporate purposes. During the 2016, we issued approximately 23,000 common shares under this program at a weighted average price of $30.98 per share, raising $0.7 million in net proceeds.

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Deferred Costs

12 Months Ended

Dec. 31, 2016

Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]

Deferred Costs

DEFERRED COSTS

As of December 31, 2016 and 2015, deferred leasing costs and deferred leasing incentives were included in prepaid expenses and other assets as follows (in thousands):

	December 31,
	2016						2015
	Gross Carrying Value		Accumulated Amortization		Net		Gross Carrying Value		Accumulated Amortization		Net
Deferred leasing costs	$	58,391	$	22,748	$	35,643	$	59,382	$	22,897	$	36,485
Deferred leasing incentives	21,157		8,061		13,096		18,701		6,066		12,635

Amortization, including write-offs, of deferred leasing costs and deferred leasing incentives from continuing operations for the three years ended December 31, 2016 were as follows (in thousands):

	Year Ended December 31,
	2016		2015		2014
Deferred leasing costs amortization	$	6,076	$	5,983	$	4,699
Deferred leasing incentives amortization	2,994		2,848		1,704

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Schedule II

12 Months Ended

Dec. 31, 2016

Valuation and Qualifying Accounts [Abstract]

Schedule II

SCHEDULE II

VALUATION AND QUALIFYING ACCOUNTS

FOR THE YEARS ENDED DECEMBER 31, 2016, 2015 AND 2014

(IN THOUSANDS)

	Balance at Beginning of Year		Additions Charged to Expenses		Net Deductions (Recoveries)			Balance at End of Year
Allowance for doubtful accounts
2016	$	2,297	$	1,706	$	(1,626	)	$	2,377
2015	$	3,392	$	1,368	$	(2,463	)	$	2,297
2014	$	6,783	$	1,402	$	(4,793	)	$	3,392
Valuation allowance for deferred tax assets
2016	$	5,705	$	—	$	(2,823	)	$	2,882
2015	$	5,714	$	—	$	(9	)	$	5,705
2014	$	5,741	$	—	$	(27	)	$	5,714

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Schedule III

12 Months Ended

Dec. 31, 2016

SEC Schedule III, Real Estate and Accumulated Depreciation Disclosure [Abstract]

Schedule III

SCHEDULE III

		Initial Cost (b)				Net Improvements (Retirement) since Acquisition			Gross Amounts at Which Carried at December 31, 2016						Accumulated Depreciation at December 31, 2016
Properties	Location	Land		Buildings and Improvements					Land		Buildings and Improvements		Total (c)				Year of Construction	Date of Acquisition	Net  Rentable Square Feet (e)	Units	Depreciation Life (d)
Multifamily Properties
3801 Connecticut Avenue	Washington, DC	$	420,000	$	2,678,000	$	14,548,000		$	420,000	$	17,226,000	$	17,646,000	$	10,671,000	1951	Jan 1963	178,000	307	30 years
Roosevelt Towers	Virginia	336,000		1,996,000		12,261,000			336,000		14,257,000		14,593,000		9,491,000		1964	May 1965	170,000	191	40 years
Park Adams	Virginia	287,000		1,654,000		11,904,000			287,000		13,558,000		13,845,000		9,444,000		1959	Jan 1969	173,000	200	35 years
The Ashby at McLean	Virginia	4,356,000		17,102,000		22,576,000			4,356,000		39,678,000		44,034,000		23,631,000		1982	Aug 1996	274,000	256	30 years
Walker House Apartments	Maryland	2,851,000		7,946,000		7,157,000			2,851,000		15,103,000		17,954,000		10,751,000		1971	Mar 1996	157,000	212	30 years
Bethesda Hill Apartments	Maryland	3,900,000		13,412,000		13,280,000			3,900,000		26,692,000		30,592,000		17,788,000		1986	Nov 1997	225,000	195	30 years
Bennett Park	Virginia	2,861,000		917,000		80,226,000			4,774,000		79,230,000		84,004,000		31,960,000		2007	Feb 2001	214,000	224	28 years
The Clayborne	Virginia	269,000		—		30,858,000			699,000		30,428,000		31,127,000		13,831,000		2008	Jun 2003	60,000	74	26 years
The Kenmore (a)	Washington, DC	28,222,000		33,955,000		11,422,000			28,222,000		45,377,000		73,599,000		12,152,000		1948	Sep 2008	268,000	374	30 years
The Maxwell	Virginia	12,787,000		—		38,013,000			12,851,000		37,949,000		50,800,000		4,571,000		2014	Jun 2011	139,000	163	30 years
The Paramount	Virginia	8,568,000		38,716,000		2,073,000			8,568,000		40,789,000		49,357,000		5,774,000		1984	Oct 2013	141,000	135	30 years
Yale West (a)	Washington, DC	14,684,000		62,069,000		549,000			14,684,000		62,618,000		77,302,000		6,480,000		2011	Feb 2014	238,000	216	30 years
The Wellington	Virginia	30,548,000		116,563,000		4,137,000			30,548,000		120,700,000		151,248,000		6,325,000		1960	Jul 2015	842,000	711	30 years
Wellington Land Parcel (Trove) (f)	Virginia	15,000,000		—		3,952,000			—		18,952,000		18,952,000		—		n/a	Jul 2015	—	n/a	n/a
Riverside Apartments	Virginia	38,924,000		184,854,000		5,857,000			38,924,000		190,711,000		229,635,000		4,288,000		1971	May 2016	1,266,000	1,222	30 years
Riverside Apartments Land Parcel (f)	Virginia	15,968,000		—		441,000			—		16,409,000		16,409,000		—		n/a	May 2016	—	n/a	n/a
		$	179,981,000	$	481,862,000	$	259,254,000		$	151,420,000	$	769,677,000	$	921,097,000	$	167,157,000			4,345,000	4,480
Office Buildings
1901 Pennsylvania Avenue	Washington, DC	$	892,000	$	3,481,000	$	18,275,000		$	892,000	$	21,756,000	$	22,648,000	$	16,292,000	1960	May 1977	102,000		28 years
515 King Street	Virginia	4,102,000		3,931,000		7,795,000			4,102,000		11,726,000		15,828,000		5,775,000		1966	Jul 1992	75,000		50 years
1220 19th Street	Washington, DC	7,803,000		11,366,000		15,973,000			7,802,000		27,340,000		35,142,000		15,403,000		1976	Nov 1995	103,000		30 years
1600 Wilson Boulevard	Virginia	6,661,000		16,742,000		27,930,000			6,661,000		44,672,000		51,333,000		22,661,000		1973	Oct 1997	169,000		30 years
Silverline Center	Virginia	12,049,000		71,825,000		98,303,000			12,049,000		170,128,000		182,177,000		77,829,000		1972	Nov 1997	546,000		30 years
Courthouse Square	Virginia	—		17,096,000		9,369,000			—		26,465,000		26,465,000		14,252,000		1979	Oct 2000	118,000		30 years
1776 G Street	Washington, DC	31,500,000		54,327,000		7,448,000			31,500,000		61,775,000		93,275,000		29,983,000		1979	Aug 2003	265,000		30 years
Monument II	Virginia	10,244,000		65,205,000		9,115,000			10,244,000		74,320,000		84,564,000		25,520,000		2000	Mar 2007	208,000		30 years
2000 M Street	Washington, DC	—		61,101,000		21,696,000			—		82,797,000		82,797,000		27,776,000		1971	Dec 2007	231,000		30 years
2445 M Street	Washington, DC	46,887,000		106,743,000		6,210,000			46,887,000		112,953,000		159,840,000		36,583,000		1986	Dec 2008	290,000		30 years
925 Corporate Drive	Virginia	4,518,000		24,801,000		1,080,000			4,518,000		25,881,000		30,399,000		8,538,000		2007	Jun 2010	134,000		30 years
1000 Corporate Drive	Virginia	4,897,000		25,376,000		(249,000		)	4,898,000		25,126,000		30,024,000		7,867,000		2009	Jun 2010	136,000		30 years
1140 Connecticut Avenue	Washington, DC	25,226,000		50,495,000		13,123,000			25,226,000		63,618,000		88,844,000		16,015,000		1966	Jan 2011	183,000		30 years
1227 25th Street	Washington, DC	17,505,000		21,319,000		4,507,000			17,505,000		25,826,000		43,331,000		6,998,000		1988	Mar 2011	136,000		30 years
Braddock Metro Center	Virginia	18,817,000		71,250,000		10,978,000			18,818,000		82,227,000		101,045,000		20,104,000		1985	Sep 2011	348,000		30 years
John Marshall II	Virginia	13,490,000		53,024,000		2,841,000			13,490,000		55,865,000		69,355,000		11,536,000		1996	Sep 2011	223,000		30 years
Fairgate at Ballston	Virginia	17,750,000		29,885,000		5,327,000			17,750,000		35,212,000		52,962,000		7,288,000		1988	Jun 2012	143,000		30 years
Army Navy Building (a), (g)	Washington, DC	30,796,000		39,315,000		4,885,000			30,796,000		44,200,000		74,996,000		5,633,000		1912	Mar 2014	108,000		30 years
1775 Eye Street, NW	Washington, DC	48,086,000		51,074,000		7,833,000			48,086,000		58,907,000		106,993,000		7,593,000		1964	May 2014	186,000		30 years
		$	301,223,000	$	778,356,000	$	272,439,000		$	301,224,000	$	1,050,794,000	$	1,352,018,000	$	363,646,000			3,704,000

		Initial Cost (b)				Net Improvements (Retirement) since Acquisition		Gross Amounts at Which Carried at December 31, 2016						Accumulated Depreciation at December 31, 2016
Properties	Location	Land		Buildings and Improvements				Land		Buildings and Improvements		Total (c)				Year of Construction	Date of Acquisition	Net  Rentable Square Feet (e)	Units	Depreciation Life (d)
Retail Centers
Takoma Park	Maryland	$	415,000	$	1,084,000	$	332,000	$	415,000	$	1,416,000	$	1,831,000	$	1,194,000	1962	Jul 1963	51,000		50 years
Westminster	Maryland	519,000		1,775,000		9,839,000		519,000		11,614,000		12,133,000		7,614,000		1969	Sep 1972	150,000		37 years
Concord Centre	Virginia	413,000		850,000		5,845,000		413,000		6,695,000		7,108,000		3,414,000		1960	Dec 1973	76,000		33 years
Wheaton Park	Maryland	796,000		857,000		4,740,000		796,000		5,597,000		6,393,000		3,931,000		1967	Sep 1977	74,000		50 years
Bradlee Shopping Center	Virginia	4,152,000		5,383,000		14,205,000		4,152,000		19,588,000		23,740,000		11,579,000		1955	Dec 1984	172,000		40 years
Chevy Chase Metro Plaza	Washington, DC	1,549,000		4,304,000		8,245,000		1,549,000		12,549,000		14,098,000		6,908,000		1975	Sep 1985	50,000		50 years
Shoppes of Foxchase	Virginia	5,838,000		2,979,000		14,868,000		5,838,000		17,847,000		23,685,000		7,298,000		1960	Jun 1994	134,000		50 years
Frederick County Square	Maryland	6,561,000		6,830,000		5,295,000		6,561,000		12,125,000		18,686,000		7,828,000		1973	Aug 1995	227,000		30 years
800 S. Washington Street	Virginia	2,904,000		5,489,000		5,954,000		2,904,000		11,443,000		14,347,000		5,123,000		1951	Jun 1998	46,000		30 years
Centre at Hagerstown	Maryland	13,029,000		25,415,000		2,610,000		13,029,000		28,025,000		41,054,000		13,856,000		2000	Jun 2002	331,000		30 years
Frederick Crossing	Maryland	12,759,000		35,477,000		2,265,000		12,759,000		37,742,000		50,501,000		15,769,000		1999	Mar 2005	295,000		30 years
Randolph Shopping Center	Maryland	4,928,000		13,025,000		1,154,000		4,928,000		14,179,000		19,107,000		5,288,000		1972	May 2006	82,000		30 years
Montrose Shopping Center	Maryland	11,612,000		22,410,000		2,196,000		11,020,000		25,198,000		36,218,000		9,289,000		1970	May 2006	145,000		30 years
Gateway Overlook	Maryland	28,816,000		52,249,000		622,000		29,110,000		52,577,000		81,687,000		16,408,000		2007	Dec 2010	220,000		30 years
Olney Village Center (a)	Maryland	15,842,000		39,133,000		1,970,000		15,842,000		41,103,000		56,945,000		8,252,000		1979	Aug 2011	199,000		30 years
Spring Valley Village (g)	Washington, DC	10,836,000		32,238,000		1,913,000		10,836,000		34,151,000		44,987,000		2,871,000		1941	Oct 2014	78,000		30 years
		$	120,969,000	$	249,498,000	$	82,053,000	$	120,671,000	$	331,849,000	$	452,520,000	$	126,622,000			2,330,000

Total $ 602,173,000 $ 1,509,716,000 $ 613,746,000 $ 573,315,000 $ 2,152,320,000 $ 2,725,635,000 $ 657,425,000 10,379,000 4,480

a) At December 31, 2016, our properties were encumbered by non-recourse mortgage amounts as follows: $32.9 million on The Kenmore, $14.9 million on Olney Village Center, $47.1 million on Yale West, and $49.6 million on The Amy Navy Building (prepaid at par in February 2017). Mortgage amounts exclude premiums and debt loan costs.

b) The purchase cost of real estate investments has been divided between land and buildings and improvements on the basis of management’s determination of the fair values.

c) At December 31, 2016, total land, buildings and improvements are carried at $2,151.4 million for federal income tax purposes.

d) The useful life shown is for the main structure. Buildings and improvements are depreciated over various useful lives ranging from 3 to 50 years.

e) Residential properties are presented in gross square feet.

f) As of December 31, 2016, Washington REIT had under development multifamily properties, the Wellington land parcel (Trove) and Riverside Apartments land parcel. The value not yet placed into service at December 31, 2016 was $19.0 million and $16.4 million, respectively.

g) As of December 31, 2016, Washington REIT had investments in various development and redevelopment projects, including Army Navy Building and Spring Valley Village. The total value of these various projects not yet placed in service is $4.8 million at December 31, 2016.

The following is a reconciliation of real estate assets and accumulated depreciation for the three years ended December 31, 2016 (in thousands):

	Year Ended December 31,
	2016			2015			2014
Real estate assets
Balance, beginning of period	$	2,673,891		$	2,547,188		$	2,289,509
Additions:
Property acquisitions (1)	240,499			162,702			289,140
Improvements (1)	66,840			50,954			98,250
Deductions:
Impairment write-down	—			(5,909		)	—
Write-off of disposed assets	(1,272		)	(3,291		)	(2,857		)
Property sales	(254,323		)	(77,753		)	(126,854		)
Balance, end of period	$	2,725,635		$	2,673,891		$	2,547,188
Accumulated depreciation
Balance, beginning of period	$	692,608		$	640,434		$	611,408
Additions:
Depreciation	88,347			86,536			77,741
Deductions:
Write-off of disposed assets	(486		)	(2,408		)	(2,549		)
Property sales	(123,044		)	(31,954		)	(46,166		)
Balance, end of period	$	657,425		$	692,608		$	640,434

⁽¹⁾ Includes non-cash accruals for capital items and assumed mortgages.

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Accounting Policies (Policy)

12 Months Ended

Dec. 31, 2016

Accounting Policies [Abstract]

Principles of Consolidation and Basis of Presentation

Principles of Consolidation and Basis of Presentation

The accompanying audited 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 properties for which there is a noncontrolling interest. All intercompany balances and transactions have been eliminated in consolidation.

We have prepared the accompanying audited consolidated financial statements pursuant to the rules and regulations of the Securities and Exchange Commission.

Use of Estimates in the Financial Statements

Use of Estimates in the Financial Statements

The preparation of financial statements in conformity with Generally Accepted Accounting Principles ("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.

Recent Accounting Pronouncements

Recent Accounting Pronouncements

In January 2017, the Financial Accounting Standards Board (the "FASB") issued Accounting Standards Update No. 2017-01, Business Combinations (Topic 805) - Clarifying the Definition of a Business,which adds guidance to assist entities with evaluating whether transactions should be accounted for as acquisitions of assets or businesses. Under the new guidance, a set of transferred assets and activities is not a business when substantially all of the fair value of the gross assets acquired is concentrated in a single identifiable asset or group of similar identifiable assets. If a set of transferred assets and activities does not meet this threshold, then an entity must evaluate whether the set meets the requirement that a business include, at a minimum, an input and a substantive process that together significantly contribute to the ability to create outputs. The new standard is effective for public entities for fiscal years beginning after December 15, 2017 and for interim periods therein. Early adoption of the standard is allowed for transactions that have not been reported in financial statements issued prior to the new standards issuance date. Prior to the new guidance, we accounted for acquisitions of operating properties as business combinations, but generally expect that future acquisitions of operating properties will be accounted for as asset acquisitions under the new guidance. Acquisition costs are capitalized in asset acquisitions but expensed in business combinations. Identifiable assets, liabilities assumed and any noncontrolling interests are recognized and measured as of the acquisition date at fair value in a business combination, but are measured by allocating the cost of the acquisition on a relative fair value basis in an asset acquisition.

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 March 2016, the FASB issued Accounting Standards Update No. 2016-09, Improvements to Employee Share-Based Payment Accounting ("ASU 2016-09"),which amends existing accounting standards for employee share-based payments, including by allowing an employer to make a policy election to account for forfeitures as they occur or to continue to provide for an estimate as currently required. ASU 2016-09 also allows an employer to withhold shares in a net settlement in an amount that does not exceed the maximum statutory tax rate in the employees' tax jurisdiction without causing liability classification, and clarifies that all cash payments made to taxing authorities on the employees' behalf for withheld shares should be presented as financing activities on the consolidated statements of cash flows. ASU 2016-09 is effective for public entities for fiscal years beginning after December 15, 2016 and for interim periods therein with early adoption permitted. We adopted ASU 2016-09 as of December 31, 2016 and elected to account for forfeitures as they occur. In accordance with ASU 2016-09, we used the modified retrospective transition method for this election, resulting in a charge to retained earnings of less than $0.1 million. Regarding the cash payments made to taxing authorities on the employees' behalf for withheld shares, we had previously presented such payments as operating activities on our consolidated statements of cash flows, and have applied this change retrospectively. The impact of the implementation of ASU 2016-09 on our consolidated statements of cash flows is as follows (in thousands):

	Year Ended December 31,
	2016			2015			2014
Net cash provided by operating activities (prior to adoption of ASU 2016-09)	$	114,971		$	107,355		$	80,701
Reclassification of cash payments for withheld shares	1,960			2,071			2,416
Net cash provided by operating activities (after adoption of ASU 2016-09)	$	116,931		$	109,426		$	83,117
Net cash used in financing activities (prior to adoption of ASU 2016-09)	$	(68,859	)	$	(6,339	)	$	(87,335	)
Reclassification of cash payments for withheld shares	(1,960		)	(2,071		)	(2,416		)
Net cash used in financing activities (after adoption of ASU 2016-09)	$	(70,819	)	$	(8,410	)	$	(89,751	)

In February 2016, the FASB issued Accounting Standards Update No. 2016-05, Derivatives and Hedging (Topic 815), which clarifies that a change in the counterparty to a derivative instrument that has been designated as the hedging instrument under Topic 815, in and of itself, does not require dedesignation of that hedging relationship provided that all other hedging criteria continue to be met. The new standard is effective for public entities for fiscal years beginning after December 15, 2016 and for interim periods therein with early adoption permitted. We do not expect the new standard to have a material impact 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 February 2015, the FASB issued Accounting Standards Update No. 2015-02, Consolidation (Topic 810), which changes the analysis an entity must perform to determine whether it should consolidate certain types of legal entities. Specifically, the new standard i) modifies the evaluation of whether limited partnerships and similar legal entities are variable interest entities ("VIEs") or voting interest entities, ii) eliminates the presumption that a general partner should consolidate a limited partnership and iii) affects the consolidation analysis of reporting entities that are involved with VIEs, particularly those that have fee arrangements and related party relationships. The new standard is effective for public entities for fiscal years beginning after December 15, 2015 and for interim periods therein. We adopted the new standard on January 1, 2016, and the provisions of the new standard did not have any impact on the consolidation of our legal entities.

In August 2014, the FASB issued ASU No. 2014-15, Presentation of Financial Statements - Going Concern (Subtopic 205-40), which provides guidance on management's responsibility to evaluate whether there is substantial doubt about an entity's ability to continue as a going concern and to provide related footnote disclosures. Under the new standard, if conditions or events raise substantial doubt about an entity's ability to continue as a going concern, and substantial doubt is not alleviated after consideration of management's plans, an entity should include a statement in the footnotes indicating that there is substantial doubt about the entity's ability to continue as a going concern. The new standard is effective for fiscal years ending after December 15, 2016 and for annual and interim periods thereafter. We adopted the new standard during the fourth quarter of 2016 and the adoption did not require any disclosures about our ability to continue as a going concern.

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 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, Leases (Topic 842), 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 No. 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.

Revenue Recognition

Revenue Recognition

We lease multifamily properties under operating leases with terms of generally one year or less. We lease commercial properties (our office and retail segments) under operating leases with an average term of seven years. Substantially all commercial leases contain fixed escalations or, in some instances, changes based on the Consumer Price Index, which occur at specified times during the term of the lease. We recognize rental income and rental abatements from our multifamily and commercial leases when earned on a straight-line basis over the lease term. Recognition of rental income commences when control of the leased space has been given to the tenant.

We recognize sales of real estate at closing only when sufficient down payments have been obtained, possession and other attributes of ownership have been transferred to the buyer and we have no significant continuing involvement.

We recognize cost reimbursement income from pass-through expenses on an accrual basis over the periods in which the expenses were incurred. Pass-through expenses are comprised of real estate taxes, operating expenses and common area maintenance costs which are reimbursed by tenants in accordance with specific allowable costs per tenant lease agreements.

Parking revenues are derived from leases, monthly parking agreements and transient parking. We recognize parking revenues from leases on a straight-line basis over the lease term and other parking revenues as earned.

Accounts Receivable and Allowance for Doubtful Accounts

Accounts Receivable and Allowance for Doubtful Accounts

Accounts receivable primarily represents amounts accrued and unpaid from tenants in accordance with the terms of the respective leases, subject to our revenue recognition policy. We review receivables monthly and establish reserves when, in the opinion of management, collection of the receivable is doubtful. We establish reserves for tenants whose rent payment histories or financial conditions cast doubt upon the tenants’ abilities to perform under their lease obligations. When we determine the collection of a receivable to be doubtful in the same quarter that we established the receivable, we recognize the allowance for that receivable as an offset to real estate revenues. When we determine a receivable that was initially established in a prior quarter to be doubtful, we recognize the allowance as an operating expense in Real estate expenses in the consolidated statements of income. In addition to rents due currently, accounts receivable include amounts representing minimal rental income accrued on a straight-line basis to be paid by tenants over the remaining term of their respective leases.

Debt Issuance Costs

Debt Issuance Costs

We amortize external debt issuance costs using the effective interest rate method or the straight-line method which approximates the effective interest rate method, over the estimated life of the related debt. We record debt issuance costs related to notes and mortgage notes, net of amortization, on our consolidated balance sheets as an offset to their related debt. We record debt issuance costs related to revolving lines of credit on our consolidated balance sheets with Prepaid expenses and other assets, regardless of whether a balance on the line of credit is outstanding. We record the amortization of all debt issuance costs as interest expense.

Deferred Leasing Costs

Deferred Leasing Costs

We capitalize and amortize costs associated with the successful negotiation of leases, both external commissions and internal direct costs, on a straight-line basis over the terms of the respective leases. We record the amortization of deferred leasing costs in Depreciation and amortization on the consolidated statements of income. If an applicable lease terminates prior to the expiration of its initial lease term, we write off the carrying amount of the costs to amortization expense.

We capitalize and amortize against revenue leasing incentives associated with the successful negotiation of leases on a straight-line basis over the terms of the respective leases. We record the amortization of deferred leasing incentives as a reduction of revenue. If an applicable lease terminates prior to the expiration of its initial lease term, we write off the carrying amount of the costs as a reduction of revenue.

Real Estate and Depreciation

Real Estate and Depreciation

We depreciate buildings on a straight-line basis over estimated useful lives ranging from 28 to 50 years. We capitalize all capital improvements associated with replacements, improvements or major repairs to real property that extend its useful life and depreciate them using the straight-line method over their estimated useful lives ranging from 3 to 30 years. We also capitalize costs incurred in connection with our development projects, including capitalizing interest incurred on borrowing obligations and other internal costs during periods in which qualifying expenditures have been made and activities necessary to get the development projects ready for their intended use are in progress. Capitalization of these costs begin when the activities and related expenditures commence and cease when the project is substantially complete and ready for its intended use, at which time the project is placed in service and depreciation commences. In addition, we capitalize tenant leasehold improvements when certain criteria are met, including when we supervise construction and will own the improvements. We depreciate all tenant improvements over the shorter of the useful life of the improvements or the term of the related tenant lease.

Real estate depreciation expense from continuing operations was $84.1 million, $80.7 million, $71.4 million during the years ended December 31, 2016, 2015 and 2014, respectively.

We charge maintenance and repair costs that do not extend an asset’s useful life to expense as incurred.

Interest expense and interest capitalized to real estate assets related to development and major renovation activities for the three years ended December 31, 2016 were as follows (in thousands):

	Year Ended December 31,
	2016			2015			2014
Total interest incurred	$	53,794		$	60,204		$	61,927
Capitalized interest	(668		)	(658		)	(2,142		)
Interest expense, net of capitalized interest	$	53,126		$	59,546		$	59,785

We recognize impairment losses on long-lived assets used in operations, development assets or land held for future development, if indicators of impairment are present and the net undiscounted cash flows estimated to be generated by those assets are less than the assets' carrying amount and estimated undiscounted cash flows associated with future development expenditures. If such carrying amount is in excess of the estimated undiscounted cash flows from the operation and disposal of the property, we would recognize an impairment loss equivalent to an amount required to adjust the carrying amount to its estimated fair value, calculated in accordance with current GAAP fair value provisions. Assets held for sale are recorded at the lower of cost or fair value less costs to sell.

We record acquired or assumed assets, including physical assets and in-place leases, and liabilities, based on their fair values. We determine the fair values of acquired buildings on an “as-if-vacant” basis considering a variety of factors, including the replacement cost of the property, estimated rental and absorption rates, estimated future cash flows and valuation assumptions consistent with current market conditions. We determine the fair value of land acquired based on comparisons to similar properties that have been recently marketed for sale or sold.

The fair value of in-place leases consists of the following components – (a) the estimated cost to us to replace the leases, including foregone rents during the period of finding a new tenant and foregone recovery of tenant pass-throughs (referred to as “absorption cost”); (b) the estimated cost of tenant improvements, and other direct costs associated with obtaining a new tenant (referred to as “tenant origination cost”); (c) estimated leasing commissions associated with obtaining a new tenant (referred to as “leasing commissions”); (d) the above/at/below market cash flow of the leases, determined by comparing the projected cash flows of the leases in place, including consideration of renewal options, to projected cash flows of comparable market-rate leases (referred to as “net lease intangible”); and (e) the value, if any, of customer relationships, determined based on our evaluation of the specific characteristics of each tenant’s lease and our overall relationship with the tenant (referred to as “customer relationship value”). We have attributed no value to customer relationships as of December 31, 2016 and 2015.

We discount the amounts used to calculate net lease intangibles using an interest rate which reflects the risks associated with the leases acquired. We classify tenant origination costs as Income producing property on our consolidated balance sheets and amortize the tenant origination costs as depreciation expense on a straight-line basis over the remaining life of the underlying leases. We classify leasing commissions and absorption costs as other assets and amortize leasing commissions and absorption costs as amortization expense on a straight-line basis over the remaining life of the underlying leases. We classify net lease intangible assets as other assets and amortize them on a straight-line basis as a decrease to real estate rental revenue over the remaining term of the underlying leases. We classify net lease intangible liabilities as other liabilities and amortize them on a straight-line basis as an increase to real estate rental revenue over the remaining term of the underlying leases. If any of the fair value of below market lease intangibles includes fair value associated with a renewal option, such amounts are not amortized until the renewal option is executed, else the related value is expensed at that time. Should a tenant terminate its lease, we accelerate the amortization of the unamortized portion of the tenant origination cost, leasing commissions, absorption costs and net lease intangible associated with that lease, over its new, shorter term.

Discontinued Operations

Discontinued Operations

We classify properties as held for sale when they meet the necessary criteria, which include: (a) senior management commits to and actively embarks upon a plan to sell the assets, (b) the sale is expected to be completed within one year under terms usual and customary for such sales and (c) actions required to complete the plan indicate that it is unlikely that significant changes to the plan will be made or that the plan will be withdrawn. We generally consider that a property has met these criteria when a sale of the property has been approved by the board of trustees, or a committee with authorization from the board of trustees, there are no known significant contingencies related to the sale and management believes it is probable that the sale will be completed within one year. Depreciation on these properties is discontinued at the time they are classified as held for sale, but operating revenues, operating expenses and interest expense continue to be recognized until the date of sale.

Under ASU No. 2014-08, Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity, which we adopted as of January 1, 2014, revenues and expenses of properties that are either sold or classified as held for sale are presented as discontinued operations for all periods presented in the consolidated statements of income if the dispositions represent a strategic shift that has (or will have) a major effect on our operations and financial results. Interest on debt that can be identified as specifically attributed to these properties is included in discontinued operations. If the dispositions do not represent a strategic shift that has (or will have) a major effect on our operations and financial results, then the revenues and expenses of the properties that are classified as sold or held for sale are presented as continuing operations in the consolidated statements of income for all periods presented. The provisions of ASU No. 2014-08 apply only to properties classified as held for sale or sold after our adoption date of January 1, 2014.

Segments

Segments

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.

Cash and Cash Equivalents

Cash and Cash Equivalents

Cash and cash equivalents include cash and commercial paper with original maturities of 90 days or less. We maintain cash deposits with financial institutions that at times exceed applicable insurance limits. We reduce this risk by maintaining such deposits with high quality financial institutions that management believes are credit-worthy.

Restricted Cash

Restricted Cash

Restricted cash includes funds escrowed for tenant security deposits, real estate tax, insurance and mortgage escrows and escrow deposits required by lenders on certain of our properties to be used for future building renovations or tenant improvements.

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” under the two-class method with respect to the unvested restricted share awards. We further evaluate any other potentially dilutive securities at the end of the period and adjust the basic earnings per share calculation for the impact of those securities that are dilutive. Our dilutive earnings per share calculation includes the dilutive impact of employee stock options based on the treasury stock method and our performance share units under the contingently issuable method.

Stock based Compensation

Stock Based Compensation

We currently maintain equity based compensation plans for trustees, officers and employees.

We recognize compensation expense for service-based share awards ratably over the period from the service inception date through the vesting period based on the fair market value of the shares on the date of grant. If an award's service inception date precedes the grant date, we initially measure compensation expense for awards with performance conditions at fair value at the service inception date based on probability of payout, and we remeasure compensation expense at subsequent reporting dates until all of the award’s key terms and conditions are known and the grant date is established. We amortize awards with performance conditions using the graded expense method. We measure compensation expense for awards with market conditions based on the grant date fair value, as determined using a Monte Carlo simulation, and we amortize the expense ratably over the requisite service period, regardless of whether the market conditions are achieved and the awards ultimately vest. Compensation expense for the trustee grants, which fully vest immediately, is fully recognized upon issuance based upon the fair market value of the shares on the date of grant.

Accounting for Uncertainty in Income Taxes

Accounting for Uncertainty in Income Taxes

We can recognize a tax benefit only if it is “more likely than not” that a particular tax position will be sustained upon examination or audit. To the extent that the “more likely than not” standard has been satisfied, the benefit associated with a tax position is measured as the largest amount that is greater than 50% likely of being recognized upon settlement. As of December 31, 2016 and 2015, we did not have any unrecognized tax benefits. We do not believe that there will be any material changes to our uncertain tax positions over the next twelve months.

We are subject to federal income tax as well as income tax of the states of Maryland and Virginia, and the District of Columbia. However, as a REIT, we generally are not subject to income tax on our taxable income to the extent it is distributed as dividends to our shareholders.

Tax returns filed for 2012 through 2016 tax years are subject to examination by taxing authorities. We classify interest and penalties related to uncertain tax positions, if any, in our financial statements as a component of general and administrative expense.

Derivatives

Derivatives

We borrow funds at a combination of fixed and variable rates. Borrowings under our revolving credit facility and term loans bear interest at variable rates. Our interest rate risk management objectives are to minimize interest rate fluctuation on long-term indebtedness and limit the impact of interest rate changes on earnings and cash flows. To achieve these objectives, from time to time, we may enter into interest rate hedge contracts such as collars, swaps, caps and treasury lock agreements in order to mitigate our interest rate risk with respect to various debt instruments. We generally do not hold or issue these derivative contracts for trading or speculative purposes. The interest rate swaps we enter into are recorded at fair value on a recurring basis. We assess effectiveness of our cash flow hedges both at inception and on an ongoing basis. The effective portion of changes in fair value of the interest rate swaps associated with our cash flow hedges is recorded in accumulated other comprehensive income (loss). Our cash flow hedges become ineffective if critical terms of the hedging instrument and the debt instrument such as notional amounts, settlement dates, reset dates, calculation period and LIBOR do not perfectly match. In addition, we evaluate the default risk of the counterparty by monitoring the creditworthiness of the counterparty. When ineffectiveness of a cash flow hedge exists, the ineffective portion of changes in fair value of the interest rate swaps associated with our cash flow hedges is recognized in earnings in the period affected.

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Nature of Business (Tables)

12 Months Ended

Dec. 31, 2016

Discontinued Operations and Disposal Groups [Abstract]

Schedule of Dispositions

During the three years ended December 31, 2016, we sold our interests in the following properties (in thousands):

Disposition Date	Property	Type	Gain on Sale
May 26, 2016	Dulles Station II (1)	Office	$	527
June 27, 2016	Maryland Office Portfolio Transaction I (2)	Office	23,585
September 22, 2016	Maryland Office Portfolio Transaction II (3)	Office	77,592
		Total 2016	$	101,704
March 20, 2015	Country Club Towers	Multifamily	$	30,277
September 9, 2015	1225 First Street (4)	Multifamily	—
October 21, 2015	Munson Hill Towers	Multifamily	51,395
December 14, 2015	Montgomery Village Center	Retail	7,981
		Total 2015	$	89,653
January 21, 2014	Medical Office Portfolio Transactions III & IV (5)	Medical Office	$	105,985
May 2, 2014	5740 Columbia Road	Retail	570
		Total 2014	$	106,555

⁽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.

⁽⁴⁾ Interest in land held for future development.

⁽⁵⁾ Medical Office Portfolio Transactions III & IV consist of Woodburn Medical Park I and II and Prosperity Medical Center I, II and III.

Taxable Percentage of Dividends Paid

The following is a breakdown of the taxable percentage of our dividends for these years ended December 31, 2016, 2015 and 2014 (unaudited):

	2016		2015		2014
Ordinary income	66	%	78	%	40	%
Return of capital	33	%	22	%	52	%
Qualified dividends	—	%	—	%	—	%
Unrecaptured Section 1250 gain	1	%	—	%	8	%
Capital gain	—	%	—	%	—	%

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Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2016

Accounting Policies [Abstract]

Schedule of New Accounting Pronouncements and Changes in Accounting Principles

The impact of the implementation of ASU 2016-09 on our consolidated statements of cash flows is as follows (in thousands):

	Year Ended December 31,
	2016			2015			2014
Net cash provided by operating activities (prior to adoption of ASU 2016-09)	$	114,971		$	107,355		$	80,701
Reclassification of cash payments for withheld shares	1,960			2,071			2,416
Net cash provided by operating activities (after adoption of ASU 2016-09)	$	116,931		$	109,426		$	83,117
Net cash used in financing activities (prior to adoption of ASU 2016-09)	$	(68,859	)	$	(6,339	)	$	(87,335	)
Reclassification of cash payments for withheld shares	(1,960		)	(2,071		)	(2,416		)
Net cash used in financing activities (after adoption of ASU 2016-09)	$	(70,819	)	$	(8,410	)	$	(89,751	)

Capitalized Interest Expense

Interest expense and interest capitalized to real estate assets related to development and major renovation activities for the three years ended December 31, 2016 were as follows (in thousands):

	Year Ended December 31,
	2016			2015			2014
Total interest incurred	$	53,794		$	60,204		$	61,927
Capitalized interest	(668		)	(658		)	(2,142		)
Interest expense, net of capitalized interest	$	53,126		$	59,546		$	59,785

Components of Fair Value of In-Place Leases

Balances, net of accumulated depreciation or amortization, as appropriate, of the components of the fair value of in-place leases at December 31, 2016 and 2015 were as follows (in thousands):

	December 31,
	2016						2015
	Gross Carrying Value		Accumulated Amortization		Net		Gross Carrying Value		Accumulated Amortization		Net
Tenant origination costs	$	54,352	$	44,823	$	9,529	$	55,664	$	41,138	$	14,526
Leasing commissions/absorption costs	101,311		86,210		15,101		97,678		75,014		22,664
Net lease intangible assets	18,903		14,193		4,710		19,655		12,434		7,221
Net lease intangible liabilities	33,687		25,359		8,328		34,027		23,444		10,583
Below-market ground lease intangible asset	12,080		1,714		10,366		12,080		1,524		10,556

Amortization of these combined components during the three years ended December 31, 2016, 2015 and 2014 was as follows (in thousands):

	Year Ended December 31,
	2016		2015		2014
Depreciation and amortization expense	$	17,655	$	22,244	$	19,854
Real estate rental revenue, net	410		538		456
	$	18,065	$	22,782	$	20,310

Components of Fair Value of In-Place Leases - Future Amortization

Amortization of these combined components over the next five years is projected to be as follows (in thousands):

	Depreciation and amortization expense		Real estate rental revenue, net decrease (increase)			Total
2017	$	8,874	$	(148	)	$	8,726
2018	6,096		(633		)	5,463
2019	3,572		(525		)	3,047
2020	2,357		(320		)	2,037
2021	1,411		(313		)	1,098

Reclassification Schedule

Prior year amounts have been reclassified to conform with current year presentation as follows (in thousands):

	Year Ended December 31,
	2015		2014
Utilities	$	18,004	$	18,056
Real estate taxes	37,152		33,436
Repairs and maintenance	14,095		13,375
Property administration and management	23,099		20,460
Operating services and common area maintenance	15,974		15,068
Other real estate expenses	3,910		3,300
Real estate expenses	$	112,234	$	103,695

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Real Estate Investments (Tables)

12 Months Ended

Dec. 31, 2016

Real Estate [Abstract]

Schedule of Real Estate Properties

As of December 31, 2016 and 2015, our real estate investment portfolio, at cost, consists of properties as follows (in thousands):

	December 31,
	2016		2015
Office	$	1,349,378	$	1,554,334
Multifamily	885,084		641,424
Retail	450,941		442,039
	$	2,685,403	$	2,637,797

Schedule of Development Costs

The cost of our real estate portfolio under development or held for future development as of December 31, 2016 and 2015 is as follows (in thousands):

	December 31,
	2016		2015
Office	$	2,640	$	18,711
Multifamily	36,013		16,307
Retail	1,579		1,076
	$	40,232	$	36,094

Schedule Of Real Estate Property Acquired

Properties and land for development acquired during the three years ended December 31, 2016 were as follows:

Acquisition Date	Property	Type	# of units (unaudited)	Rentable Square  Feet (unaudited)	Contract Purchase  Price (in thousands)
May 20, 2016	Riverside Apartments	Multifamily	1,222	N/A	$	244,750
July 1, 2015	The Wellington	Multifamily	711	N/A	$	167,000
February 21, 2014	Yale West	Multifamily	216	N/A	$	73,000
March 26, 2014	The Army Navy Building	Office	N/A	108,000	79,000
May 1, 2014	1775 Eye Street, NW	Office	N/A	185,000	104,500
October 1, 2014	Spring Valley Retail Center	Retail	N/A	75,000	40,500
		Total 2014	216	368,000	$	297,000

Revenue and Earnings From Acquisition

The revenue and earnings of our acquisitions during their year of acquisition for the three years ended December 31, 2016 are as follows (in thousands):

	Year Ended December 31,
	2016			2015			2014
Real estate rental revenue	$	13,112		$	6,797		$	16,260
Net loss	(1,688		)	(2,748		)	(3,168		)

Total Purchase Price Of Acquisitions

We have recorded the total purchase price of the above acquisitions as follows (in thousands):

	2016			2015		2014
Land	$	38,924		$	30,548	$	104,403
Land held for development	15,968			15,000		—
Buildings	184,854			116,563		172,671
Tenant origination costs	—			—		9,377
Leasing commissions/absorption costs	4,992			4,889		16,474
Net lease intangible assets	22			—		7,331
Net lease intangible liabilities	(10		)	—		(8,323		)
Fair value of assumed mortgage	—			—		(107,125		)
Furniture, fixtures & equipment	—			—		932
Total	$	244,750		$	167,000	$	195,740

Business Acquisition, Pro Forma Information

The following unaudited pro-forma combined condensed statements of operations set forth the consolidated results of operations for the years ended December 31, 2016 and 2015 as if the above described acquisition in 2016 had occurred on January 1, 2015. The pro forma adjustments exclude acquisition costs directly related to the above-described acquisition. The unaudited pro-forma information does not purport to be indicative of the results that actually would have occurred if the acquisition had been in effect for the years ended December 31, 2016 and 2015. The unaudited data presented is in thousands, except per share data.

	Year Ended December 31,
	2016		2015
Real estate revenues	$	321,386	$	327,605
Net income	$	127,439	$	90,040
Diluted earnings per share	$	1.76	$	1.31

schedule of assets in joint venture

As of December 31, 2016 and 2015, The Maxwell's assets were as follows (in thousands):

	December 31,
	2016			2015
Land	$	12,851		$	12,851
Income producing property	37,949			37,791
Accumulated depreciation and amortization	(4,571		)	(2,347		)
Other assets	456			1,188
	$	46,685		$	49,483

Schedule Of Accounts Payable And Accrued Liabilities Of Joint Ventures

As of December 31, 2016 and 2015, The Maxwell's liabilities were as follows (in thousands):

	December 31,
	2016			2015
Mortgage notes payable, net	$	31,869	(1)	$	32,214
Accounts payable and other liabilities	186			256
Tenant security deposits	99			82
	$	32,154		$	32,552

Schedule of Dispositions

We sold our interests in the following properties during the three years ended December 31, 2016:

Disposition Date	Property	Segment	# of units (unaudited)	Rentable Square Feet (unaudited)	Contract Sales Price (in thousands)		Gain on Sale (in thousands)
May 26, 2016	Dulles Station, Phase II (1)	Office	N/A	N/A	$	12,100	$	527
June 27, 2016	Maryland Office Portfolio Transaction I (2)	Office	N/A	692,000	111,500		23,585
September 22, 2016	Maryland Office Portfolio Transaction II (3)	Office	N/A	491,000	128,500		77,592
		Total 2016		1,183,000	$	252,100	$	101,704
March 20, 2015	Country Club Towers	Multifamily	227	N/A	$	37,800	$	30,277
September 9, 2015	1225 First Street (4)	Multifamily	N/A	N/A	14,500		—
October 21, 2015	Munson Hill Towers	Multifamily	279	N/A	57,050		51,395
December 14, 2015	Montgomery Village Center	Retail	N/A	197,000	27,750		7,981
		Total 2015	506	197,000	$	137,100	$	89,653
January 21, 2014	Medical Office Portfolio Transactions III & IV (5)	Medical Office	N/A	427,000	$	193,561	$	105,985
May 2, 2014	5740 Columbia Road	Retail	N/A	3,000	1,600		570
		Total 2014	N/A	430,000	$	195,161	$	106,555

⁽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.

⁽⁴⁾  Interest in land held for future development.

⁽⁵⁾   These properties are classified as discontinued operations. All other sold properties are classified as continuing operations.

Schedule of significant disposition

Real estate rental revenue and net income for the Maryland Office Portfolio for the three years endedDecember 31, 2016 are as follows:

	Year Ending December 31,
	2016		2015		2014
Real estate rental revenue	$	20,266	$	32,423	$	31,811
Net income	9,376		9,848		9,352

Schedule of income statement results for medical office segment sold

The impact of the sale of our medical office segment on revenues and net income is summarized as follows (in thousands, except per share data):

	Year Ending December 31,
	2016		2015		2014
Real estate revenues	$	—	$	—	$	892
Net income	—		—		546
Basic and diluted net income per share	—		—		0.01

Disposal Groups, Including Discontinued Operations

Income from properties classified as discontinued operations for the three years ended December 31, 2016 was as follows (in thousands):

	Year Ending December 31,
	2016		2015		2014
Revenues	$	—	$	—	$	892
Property expenses	—		—		(346		)
	$	—	$	—	$	546

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Mortgage Notes Payable (Tables)

12 Months Ended

Dec. 31, 2016

Notes Payable, Noncurrent [Abstract]

Schedule of Debt

As of December 31, 2016 and 2015, we had outstanding mortgage notes payable, each collateralized by one or more buildings and related land from our portfolio, as follows (in thousands):

				December 31,
Properties	Assumption/Issuance Date (1)	Effective Interest Rate (2)		2016			2015			Payoff Date/Maturity Date
Army Navy Building (3)	3/26/2014	3.18	%	$	49,618		$	50,750		2/1/2017
Yale West (4)	2/21/2014	3.75	%	47,078			47,502			1/31/2022
The Maxwell (5)	2/21/2013	2.27	%	—			32,248			1/27/2016
John Marshall II (6)	9/15/2011	5.79	%	—			51,011			2/8/2016
Olney Village Center	8/30/2011	4.94	%	14,851			16,503			10/1/2023
Kenmore Apartments	2/2/2009	5.37	%	32,938			33,637			3/1/2019
2445 M Street (7)	12/2/2008	7.25	%	—			101,866			10/6/2016
3801 Connecticut Avenue, Walker House and Bethesda Hill (8)	5/29/2008	5.71	%	—			81,029			6/1/2016
				144,485			414,546
Premiums and discounts, net				4,354			4,175
Debt issuance costs, net				(299		)	(669		)
				$	148,540		$	418,052

⁽¹⁾ Each of these mortgages was assumed with the acquisition of the collateralized properties, except for the mortgage notes secured by 3801 Connecticut Avenue, Walker House, Bethesda Hill, Kenmore Apartments, and the construction loan secured by the development project at The Maxwell, which were originally executed by Washington REIT. We record mortgages assumed in an acquisition at fair value.

⁽²⁾ Yield on the assumption/issuance date, including the effects of any premiums, discounts or fair value adjustments on the notes.

⁽³⁾ The note was prepaid without penalty in February 2017.

⁽⁴⁾ The maturity date of the mortgage note is January 1, 2052, but can be prepaid, without penalty, beginning on January 31, 2022.

⁽⁵⁾ Interest rate on The Maxwell construction loan was variable, based on LIBOR plus 2.0%. Interest and principal was payable monthly starting March 2016 until the extended maturity date of February 20, 2017, upon which all unpaid principal and interest were payable in full. In January 2016, Washington REIT exercised its right to purchase the construction loan without penalty from the lender (see note 3, under "Variable Interest Entities").

⁽⁶⁾ The note was prepaid without penalty in February 2016.

⁽⁷⁾ Interest only was payable monthly until the note was prepaid without penalty in October 2016.

⁽⁸⁾ Interest only was payable monthly until the note was repaid without penalty in June 2016.

Schedule of Maturities of Long-term Debt

Scheduled principal payments subsequent to December 31, 2016 are as follows (in thousands):

2017	$	52,571
2018	3,135
2019	33,909
2020	2,659
2021	2,829
Thereafter	49,382
	$	144,485

The required principal payments as of December 31, 2016 are as follows (in thousands):

2017	$	—
2018	—
2019	—
2020	250,000
2021	150,000
Thereafter	450,000
	$	850,000

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Unsecured Lines Of Credit Payable (Tables)

12 Months Ended

Dec. 31, 2016

Unsecured Debt [Abstract]

Schedule of Revolving Credit Facilities Covenant Compliance

For the three years ended December 31, 2016, we recognized interest expense (excluding facility fees) and facility fees as follows (in thousands):

	Year Ended December 31,
	2016		2015		2014
Interest expense (excluding facility fees)	$	3,272	$	2,266	$	196
Facility fees	1,220		1,241		1,267

The amount of the Revolving Credit Facility unused and available at December 31, 2016 was as follows (in thousands):

Committed capacity	$	600,000
Borrowings outstanding	(120,000		)
Unused and available	$	480,000

We executed borrowings and repayments on the Revolving Credit Facility during 2016 as follows (in thousands):

Balance at December 31, 2015	$	105,000
Borrowings	651,000
Repayments	(636,000		)
Balance at December 31, 2016	$	120,000

Information related to revolving credit facilities for the three years ended December 31, 2016 as follows (in thousands, except percentage amounts):

	Year Ended December 31,
	2016			2015			2014
Total revolving credit facilities at December 31	$	600,000		$	600,000		$	500,000
Borrowings outstanding at December 31	120,000			105,000			50,000
Weighted average daily borrowings during the year	214,962			167,573			12,849
Maximum daily borrowings during the year	358,000			350,000			55,000
Weighted average interest rate during the year	1.52		%	1.35		%	1.53		%
Weighted average interest rate on borrowings outstanding at December 31	1.64		%	1.36		%	1.37		%

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Notes Payable (Tables)

12 Months Ended

Dec. 31, 2016

Notes Payable [Abstract]

Schedule of Long-term Debt Instruments

Our unsecured notes outstanding as of December 31, 2016 were as follows (in thousands):

	Coupon/Stated Rate		Effective Rate (1)		Principal Amount			Maturity Date (2)
10 Year Unsecured Notes	4.95	%	5.05	%	$	250,000		10/1/2020
2015 Term Loan	1 Month LIBOR + 110 basis points		2.72	%	150,000			3/15/2021
10 Year Unsecured Notes	3.95	%	4.02	%	300,000			10/15/2022
2016 Term Loan	1 Month LIBOR + 165 basis points		2.86	%	100,000			7/21/2023
30 Year Unsecured Notes	7.25	%	7.36	%	50,000			2/25/2028
Total principal					850,000
Premiums and discounts, net					(1,971		)
Deferred issuance costs, net					(4,945		)
Total					$	843,084

⁽¹⁾ For fixed rate notes, the effective rate represents the yield on issuance date, including the effects of discounts on the notes. For variable rate notes, the effective rate represents the rate as fixed by interest rate derivatives (see note 7).

⁽²⁾ No principal amounts are due prior to maturity.

Schedule of Maturities of Long-term Debt

Scheduled principal payments subsequent to December 31, 2016 are as follows (in thousands):

2017	$	52,571
2018	3,135
2019	33,909
2020	2,659
2021	2,829
Thereafter	49,382
	$	144,485

The required principal payments as of December 31, 2016 are as follows (in thousands):

2017	$	—
2018	—
2019	—
2020	250,000
2021	150,000
Thereafter	450,000
	$	850,000

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Derivative Instruments (Tables)

12 Months Ended

Dec. 31, 2016

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of Derivative Instruments

The fair values of the interest rate swaps as of December 31, 2016 and 2015, are as follows (in thousands):

	Aggregate Notional Amount		Effective Date		Fair Value
					Asset Derivatives				Liability Derivatives
					December 31,				December 31,
Derivative Instrument				Maturity Date	2016		2015		2016		2015
Interest rate swaps	$	150,000	October 15, 2015	March 15, 2021	$	417	$	—	$	—	$	550
Interest rate swaps	150,000		March 31, 2017	July 21, 2023	7,194		N/A		—		N/A
	$	300,000			$	7,611	$	—	$	—	$	550

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 gains or losses on the effective swaps are recognized in other comprehensive income (loss), as follows (in thousands):

	Year Ending December 31,
	2016		2015			2014
Unrealized gain (loss) on interest rate hedges	$	8,161	$	(550	)	$	—

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Fair Value Disclosures (Tables)

12 Months Ended

Dec. 31, 2016

Fair Value Disclosures [Abstract]

Financial Assets And Liabilities Measured At Fair Value

The fair values of these assets and liabilities at December 31, 2016 and 2015 were as follows (in thousands):

	December 31, 2016								December 31, 2015
	Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets:
SERP	$	1,407	$	—	$	1,407	$	—	$	1,408	$	—	$	1,408	$	—
Derivatives	7,611		—		7,611		—		—		—		—		—
Liabilities:
Derivatives	—		—		—		—		550		—		550		—

Financial Assets And Liabilities Not Measured At Fair Value

As of December 31, 2016 and 2015, the carrying values and estimated fair values of our financial instruments were as follows (in thousands):

	December 31,
	2016				2015
	Carrying Value		Fair Value		Carrying Value		Fair Value
Cash and cash equivalents	$	11,305	$	11,305	$	23,825	$	23,825
Restricted cash	6,317		6,317		13,383		13,383
2445 M Street note receivable	2,089		2,173		3,849		4,275
Mortgage notes payable	148,540		149,997		418,052		426,693
Lines of credit payable	120,000		120,000		105,000		105,000
Notes payable	843,084		873,516		743,181		753,816

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Stock Based Compensation (Tables)

12 Months Ended

Dec. 31, 2016

Share-based Compensation [Abstract]

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions

The assumptions used to value the officer LTIP awards were as follows:

	2016 Awards		2015 Awards	2014 Awards
Expected volatility (1)	18.2	%	17.2 - 17.5%	23.2	%
Risk-free interest rate (2)	1.32	%	1.0 - 1.1%	0.8	%
Expected term (3)	3 and 4 years		3 and 4 years	3 and 4 years
Share price at grant date	$27.06		$27.66 - $27.76	$24.08

⁽¹⁾ Expected volatility based upon historical volatility of our daily closing share price.

⁽²⁾ Risk-free interest rate based on U.S. treasury constant maturity bonds on the measurement date with a maturity equal to the market condition performance period.

⁽³⁾ Expected term based on the market condition performance period.

Schedule of Restricted Share Awards

The activity for the three years ended December 31, 2016 related to our restricted share awards, excluding those subject to market conditions, was as follows:

	Shares		Wtd Avg Grant Fair Value
Unvested at December 31, 2013	129,815		$	27.06
Granted	210,817		23.93
Vested during year	(236,498	)	25.06
Forfeited	(10,467	)	25.80
Unvested at December 31, 2014	93,667		25.22
Granted	251,642		27.80
Vested during year	(212,856	)	27.18
Forfeited	(26,309	)	26.77
Unvested at December 31, 2015	106,144		27.71
Granted	251,694		26.01
Vested during year	(211,771	)	29.21
Forfeited	(38,368	)	26.14
Unvested at December 31, 2016	107,699		26.47

Performance Share Units with Market Conditions

Stock based awards with market conditions under the LTIP were granted in 2016, 2015 and 2014 with fair market values, as determined using a Monte Carlo simulation, as follows (in thousands):

	Grant Date Fair Value
	2016 Awards				2015 Awards				2014 Awards
	Restricted		Unrestricted		Restricted		Unrestricted		Restricted		Unrestricted
Relative TSR	$	182	$	546	$	191	$	634	$	458	$	1,376
Absolute TSR	82		246		76		254		327		921

Schedule Of Unamortized Value Of Awards With Market Conditions

The unamortized value of these awards with market conditions as of December 31, 2016 was as follows (in thousands):

	2016 Awards				2015 Awards				2014 Awards
	Restricted		Unrestricted		Restricted		Unrestricted		Restricted		Unrestricted
Relative TSR	$	117	$	314	$	83	$	165	$	33	$	—
Absolute TSR	53		142		33		66		19		—

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Earnings Per Common Share (Tables)

12 Months Ended

Dec. 31, 2016

Earnings Per Share [Abstract]

Computation Of Basic And Diluted Earnings Per Share

The computation of basic and diluted earnings per share for the three years ended December 31, 2016 was as follows (in thousands; except per share data):

	Year Ended December 31,
	2016			2015			2014
Numerator:
Income from continuing operations	$	119,288		$	89,187		$	5,070
Net loss attributable to noncontrolling interests	51			553			—
Allocation of undistributed earnings to unvested restricted share awards and units to continuing operations	(310		)	(269		)	5
Adjusted income from continuing operations attributable to the controlling interests	119,029			89,471			5,075
Income from discontinued operations, including gain on sale of real estate, net of taxes	—			—			106,531
Net loss attributable to noncontrolling interests	—			—			38
Allocation of undistributed earnings to unvested restricted share awards and units to discontinued operations	—			—			(322		)
Adjusted income from discontinued operations attributable to the controlling interests	—			—			106,247
Adjusted net income attributable to the controlling interests	$	119,029		$	89,471		$	111,322
Denominator:
Weighted average shares outstanding – basic	72,163			68,177			66,795
Effect of dilutive securities:
Employee stock options and restricted share awards	176			133			42
Weighted average shares outstanding – diluted	72,339			68,310			66,837
Earnings per common share, basic:
Continuing operations	$	1.65		$	1.31		$	0.08
Discontinued operations	—			—			1.59
	$	1.65		$	1.31		$	1.67
Earnings per common share, diluted:
Continuing operations	$	1.65		$	1.31		$	0.08
Discontinued operations	—			—			1.59
	$	1.65		$	1.31		$	1.67
Dividends declared per common share	$	1.20		$	1.20		$	1.20

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Rentals Under Operating Leases (Tables)

12 Months Ended

Dec. 31, 2016

Rentals Under Operating Leases [Abstract]

Schedule of Future Minimum Rental Payments for Operating Leases

As of December 31, 2016, non-cancelable commercial operating leases provide for minimum rental income were as follows (in thousands):

2017	$	172,783
2018	153,100
2019	141,158
2020	126,193
2021	100,887
Thereafter	327,421
	$	1,021,542

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Segment Information (Tables)

12 Months Ended

Dec. 31, 2016

Segment Reporting Information, Revenue for Reportable Segment [Abstract]

Real Estate Rental Revenue, Percent

Real estate rental revenue as a percentage of the total for each of the reportable operating segments in continuing operations for the three years ended December 31, 2016 was as follows:

	Year Ended December 31,
	2016		2015		2014
Office	53	%	57	%	57	%
Multifamily	27	%	22	%	22	%
Retail	20	%	21	%	21	%

Percentage of Real Estate Assets by Segment

The percentage of total income producing real estate assets, at cost, for each of the reportable operating segments in continuing operations as of December 31, 2016 and 2015 was as follows:

	December 31,
	2016		2015
Office	50	%	59	%
Multifamily	33	%	24	%
Retail	17	%	17	%

Reconciliation Of Net Operating Income Of Reportable Segments

The following tables present revenues, net operating income, capital expenditures and total assets for the three years ended December 31, 2016 from these segments, and reconciles net operating income of reportable segments to net income attributable to the controlling interests as reported (in thousands):

	Year Ended December 31, 2016
	Office		Retail		Multifamily		Corporate and Other		Consolidated
Real estate rental revenue	$	165,934	$	61,566	$	85,764	$	—	$	313,264
Real estate expenses	64,405		15,860		34,748		—		115,013
Net operating income	$	101,529	$	45,706	$	51,016	$	—	$	198,251
Depreciation and amortization									(108,406		)
General and administrative									(19,545		)
Casualty gain and real estate impairment (loss), net									676
Acquisition costs									(1,178		)
Interest expense									(53,126		)
Other income									297
Gain on sale of real estate									101,704
Income tax benefit									615
Net income									119,288
Less: Net loss attributable to noncontrolling interests									51
Net income attributable to the controlling interests									$	119,339
Capital expenditures	$	30,337	$	8,821	$	17,936	$	920	$	58,014
Total assets	$	1,104,589	$	352,056	$	762,695	$	34,279	$	2,253,619

	Year Ended December 31, 2015
	Office		Retail		Multifamily		Corporate and Other		Consolidated
Real estate rental revenue	$	174,378	$	63,507	$	68,542	$	—	$	306,427
Real estate expenses	67,228		15,606		29,400		—		112,234
Net operating income	$	107,150	$	47,901	$	39,142	$	—	$	194,193
Depreciation and amortization									(108,935		)
General and administrative									(20,123		)
Real estate impairment									(5,909		)
Acquisition costs									(2,056		)
Interest expense									(59,546		)
Other income									709
Gain on sale of real estate									91,107
Income tax expense									(134		)
Loss on extinguishment of debt									(119		)
Net income									89,187
Less: Net income attributable to noncontrolling interests									553
Net income attributable to the controlling interests									$	89,740
Capital expenditures	$	29,745	$	3,897	$	7,865	$	2,129	$	43,636
Total assets	$	1,265,570	$	354,123	$	529,773	$	41,702	$	2,191,168

	Year Ended December 31, 2014
	Office		Retail		Multifamily		Corporate and Other		Consolidated
Real estate rental revenue	$	166,116	$	60,263	$	62,258	$	—	$	288,637
Real estate expenses	63,903		14,022		25,770		—		103,695
Net operating income	$	102,213	$	46,241	$	36,488	$	—	$	184,942
Depreciation and amortization									(96,011		)
General and administrative									(19,644		)
Acquisition costs									(5,710		)
Interest expense									(59,785		)
Other income									825
Gain on sale of real estate									570
Income tax expense									(117		)
Discontinued operations:
Income from properties sold or held for sale									546
Gain on sale of real estate									105,985
Net income									111,601
Less: Net income attributable to noncontrolling interests									38
Net income attributable to the controlling interests									$	111,639
Capital expenditures	$	43,128	$	5,496	$	9,186	$	1,719	$	59,529
Total assets	$	1,283,950	$	385,074	$	408,114	$	31,179	$	2,108,317

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Selected Quarterly Financial Data (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2016

Quarterly Financial Information Disclosure [Abstract]

Schedule of Quarterly Financial Information

Unaudited financial data by quarter in each of the years ended December 31, 2016 and 2015 were as follows (in thousands, except for per share data):

	Quarter(1), (2), (3)
	First		Second			Third		Fourth
2016
Real estate rental revenue	$	77,137	$	79,405		$	79,770	$	76,952
Net income	$	2,379	$	31,821		$	79,662	$	5,426
Net income attributable to the controlling interests	$	2,384	$	31,836		$	79,674	$	5,445
Net income per share
Basic	$	0.03	$	0.44		$	1.07	$	0.07
Diluted	$	0.03	$	0.44		$	1.07	$	0.07
2015
Real estate rental revenue	$	74,856	$	74,226		$	78,243	$	79,102
Net income (loss)	$	29,398	$	(2,886	)	$	580	$	62,095
Net income (loss) attributable to the controlling interests	$	29,506	$	(2,546	)	$	647	$	62,133
Net income (loss) per share
Basic	$	0.43	$	(0.04	)	$	0.01	$	0.91
Diluted	$	0.43	$	(0.04	)	$	0.01	$	0.91

⁽¹⁾  With regard to per share calculations, the sum of the quarterly results may not equal full year results due to rounding.

⁽²⁾  The second and third quarters of 2016 include gains on sale of real estate classified as continued operations of $24.1 million and $77.6 million, respectively. The first, second and fourth quarters of 2015 include gains on sale of real estate classified as continuing operations of $30.3 million, $1.5 million and $59.4 million, respectively.

⁽³⁾  The second quarter of 2015 includes a real estate impairment of $5.9 million.

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Deferred Costs (Tables)

12 Months Ended

Dec. 31, 2016

Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]

Schedule of Deferred Cost

As of December 31, 2016 and 2015, deferred leasing costs and deferred leasing incentives were included in prepaid expenses and other assets as follows (in thousands):

	December 31,
	2016						2015
	Gross Carrying Value		Accumulated Amortization		Net		Gross Carrying Value		Accumulated Amortization		Net
Deferred leasing costs	$	58,391	$	22,748	$	35,643	$	59,382	$	22,897	$	36,485
Deferred leasing incentives	21,157		8,061		13,096		18,701		6,066		12,635

Schedule of Amortization and Write-Offs of Deferred Financing, Leasing, and Leasing Incentive Costs

Amortization, including write-offs, of deferred leasing costs and deferred leasing incentives from continuing operations for the three years ended December 31, 2016 were as follows (in thousands):

	Year Ended December 31,
	2016		2015		2014
Deferred leasing costs amortization	$	6,076	$	5,983	$	4,699
Deferred leasing incentives amortization	2,994		2,848		1,704

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Nature Of Business (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Jun. 30, 2016	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Percentage of Distribution of Ordinary Taxable Income		90.00%
Income tax benefit (expense)		$ 615	$ (134)	$ (117)
Ordinary income		66.00%	78.00%	40.00%
Return of capital		33.00%	22.00%	52.00%
Qualified dividends		0.00%	0.00%	0.00%
Unrecaptured Section 1250 gain		1.00%	0.00%	8.00%
Capital gain		0.00%	0.00%	0.00%
Taxable Reit Subsidiary [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income tax benefit (expense)	$ (700)		$ (100)	$ (100)
Deferred Tax Assets, Net		$ 500	0
Deferred Tax Liabilities		400	700
Valuation Allowance of Deferred Tax Assets [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Valuation Allowances and Reserves, Balance			5,705	5,714	$ 5,741
Valuation Allowances and Reserves, Deductions (Recoveries) Net		2,823	$ 9	$ 27
Valuation Allowance of Deferred Tax Assets [Member] | Taxable Reit Subsidiary [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Valuation Allowances and Reserves, Balance		$ 2,882

XML

Nature Of Business Properties Sold (Details) - USD ($) $ in Thousands		3 Months Ended					12 Months Ended
		Sep. 30, 2016	Jun. 30, 2016	Dec. 31, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain on sale of real estate, discontinued operations							$ 0	$ 0	$ 105,985
Gain on sale of real estate, continuing operations		$ 77,600	$ 24,100	$ 59,400	$ 1,500	$ 30,300	101,704	91,107	570
Disposal Group, Including Discontinued Operation, Gain (Loss) on Disposal								89,653	106,555
Country Club Towers [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain on sale of real estate, continuing operations								30,277
1225 First Street [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain on sale of real estate, continuing operations	[1]							0
Munson Hill Towers [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain on sale of real estate, continuing operations								51,395
Montgomery Village Center [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain on sale of real estate, continuing operations								$ 7,981
Medical Office Portfolio Transactions III & IV [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain on sale of real estate, discontinued operations	[2]								105,985
5740 Columbia Road [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain on sale of real estate, continuing operations									$ 570
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]
Gain on sale of real estate, continuing operations	[3]						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]
Gain on sale of real estate, continuing operations	[4]						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]
Gain on sale of real estate, continuing operations	[5]						$ 77,592

[1] Interest in land held for future development.

[2] Medical Office Portfolio Transactions III & IV consist of Woodburn Medical Park I and II and Prosperity Medical Center I, II and III.

[3] Land held for future development and an interest in a parking garage.

[4] Maryland Office Portfolio Transaction I consists of 6110 Executive Boulevard, 600 Jefferson Plaza, Wayne Plaza and West Gude Drive.

[5] Maryland Office Portfolio Transaction II consists of 51 Monroe Street and One Central Plaza.

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Accounting Policies - Employee share-based payment accounting (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative Effect of New Accounting Principle in Period of Adoption		$ (35)
Net Cash Provided by (Used in) Operating Activities	$ 116,931	109,426	$ 83,117
Net Cash Provided by (Used in) Financing Activities	(70,819)	(8,410)	(89,751)
Retained Earnings [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative Effect of New Accounting Principle in Period of Adoption		(35)
Accounting Standards Update 2016-09, Forfeiture Rate Component [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net Cash Provided by (Used in) Operating Activities	116,931	109,426	83,117
Net Cash Provided by (Used in) Financing Activities	(70,819)	(8,410)	(89,751)
Accounting Standards Update 2016-09, Forfeiture Rate Component [Member] | Retained Earnings [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative Effect of New Accounting Principle in Period of Adoption	100
Scenario, Previously Reported | Accounting Standards Update 2016-09, Forfeiture Rate Component [Member] | Adjustments for New Accounting Principle, Early Adoption [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net Cash Provided by (Used in) Operating Activities	114,971	107,355	80,701
Net Cash Provided by (Used in) Financing Activities	(68,859)	(6,339)	(87,335)
Restatement Adjustment | Accounting Standards Update 2016-09, Forfeiture Rate Component [Member] | Adjustments for New Accounting Principle, Early Adoption [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net Cash Provided by (Used in) Operating Activities	1,960	2,071	2,416
Net Cash Provided by (Used in) Financing Activities	$ (1,960)	$ (2,071)	$ (2,416)

XML

Accounting Policies - Revenue Recognition and Accounts Receivable and Allowance (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Property Subject to or Available for Operating Lease [Line Items]
Notes receivable, net	$ 2.4	$ 3.9
Office and Retail
Property Subject to or Available for Operating Lease [Line Items]
Lessor Leasing Arrangements, Operating Leases, Term of Contract	7 years

XML

Accounting Policies - Real Estate and Depreciation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Real estate depreciation	$ 84,100	$ 80,700	$ 71,400
Total interest incurred	53,794	60,204	61,927
Capitalized interest	(668)	(658)	(2,142)
Interest expense, net of capitalized interest	$ 53,126	$ 59,546	$ 59,785
Minimum [Member]
Property, Plant and Equipment [Line Items]
Useful Life	3 years
Minimum [Member] | Building [Member]
Property, Plant and Equipment [Line Items]
Useful Life	28 years
Minimum [Member] | Building and Building Improvements [Member]
Property, Plant and Equipment [Line Items]
Useful Life	3 years
Maximum [Member]
Property, Plant and Equipment [Line Items]
Useful Life	50 years
Maximum [Member] | Building [Member]
Property, Plant and Equipment [Line Items]
Useful Life	50 years
Maximum [Member] | Building and Building Improvements [Member]
Property, Plant and Equipment [Line Items]
Useful Life	30 years

XML

Accounting Policies - Fair value of in place leases (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Tenant Origination Costs Member
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	$ 54,352	$ 55,664
Finite-Lived Intangible Assets, Accumulated Amortization	44,823	41,138
Finite-Lived Intangible Assets, Net	9,529	14,526
Leasing Commissions Absorption Costs Member
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	101,311	97,678
Finite-Lived Intangible Assets, Accumulated Amortization	86,210	75,014
Finite-Lived Intangible Assets, Net	15,101	22,664
Net Lease Intangible Assets Member
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	18,903	19,655
Finite-Lived Intangible Assets, Accumulated Amortization	14,193	12,434
Finite-Lived Intangible Assets, Net	4,710	7,221
Net Lease Intangible Liabilities Member
Acquired Finite-Lived Intangible Assets [Line Items]
Below Market Lease, Gross	33,687	34,027
Below Market Lease, Accumulated Amortization	25,359	23,444
Below Market Lease, Net	8,328	10,583
Leases, Acquired-in-Place, Below-Market Ground Lease [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	12,080	12,080
Finite-Lived Intangible Assets, Accumulated Amortization	1,714	1,524
Finite-Lived Intangible Assets, Net	$ 10,366	$ 10,556

XML

Accounting Policies - Amortization of leased assets acquired (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Deferred leasing costs amortization	$ 6,076	$ 5,983	$ 4,699
Leases, Acquired-in-Place [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization of Intangible Assets	17,655	22,244	19,854
Amortization of above and below Market Leases	410	538	456
Finite-Lived Intangible Assets, Amortization Expense, Net of Revenue	$ 18,065	$ 22,782	$ 20,310

XML

Accounting Policies - Acquired finite-lived intangible assets (Details) $ in Thousands	Dec. 31, 2016 USD ($)
Operating Leases, Future Minimum Payments Receivable [Abstract]
2016	$ (172,783)
2017	(153,100)
2018	(141,158)
2019	(126,193)
2020	(100,887)
Leases, Acquired-in-Place [Member]
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months	8,874
Finite-Lived Intangible Assets, Amortization Expense, Year Two	6,096
Finite-Lived Intangible Assets, Amortization Expense, Year Three	3,572
Finite-Lived Intangible Assets, Amortization Expense, Year Four	2,357
Finite-Lived Intangible Assets, Amortization Expense, Year Five	1,411
Operating Leases, Future Minimum Payments Receivable [Abstract]
2016	(148)
2017	(633)
2018	(525)
2019	(320)
2020	(313)
Finite-Lived Intangible Assets Net of Revenue [Abstract]
Finite-Lived Intangible Assets, Amortization Expense, Net of Revenue, Next Twelve Months	8,726
Finite-Lived Intangible Assets, Amortization Expense, Net of Revenue, Year Two	5,463
Finite-Lived Intangible Assets, Amortization Expense, Net of Revenue, Year Three	3,047
Finite-Lived Intangible Assets, Amortization Expense, Net of Revenue, Year Four	2,037
Finite-Lived Intangible Assets, Amortization Expense, Net of Revenue, Year Five	$ 1,098

XML

Accounting Policies - Reclassification Of Real Estate Expenses (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Jun. 30, 2016	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Accounting Policies [Abstract]
Utilities			$ 18,004	$ 18,056
Real estate taxes			37,152	33,436
Repairs and maintenance			14,095	13,375
Property administration and management			23,099	20,460
Operating services and common area maintenance			15,974	15,068
Other real estate expenses			3,910	3,300
Real estate expenses		$ 115,013	112,234	103,695
New Accounting Pronouncement, Early Adoption [Line Items]
Income Tax Expense (Benefit)		$ (615)	134	117
Taxable Reit Subsidiary [Member]
New Accounting Pronouncement, Early Adoption [Line Items]
Income Tax Expense (Benefit)	$ 700		$ 100	$ 100

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Real Estate Investments - (Narrative) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Real Estate [Line Items]
Real estate investment property, at cost	$ 2,685,403	$ 2,637,797
Properties under development or held for future development	40,232	36,094
7900 Westpark Drive [Member]
Real Estate [Line Items]
Real estate investment property, at cost	25,900
The Army Navy Club Building [Member]
Real Estate [Line Items]
Properties under development or held for future development	2,200
The Wellington land parcel [Member]
Real Estate [Line Items]
Properties under development or held for future development	19,000	19,000
Riverside Developments [Member]
Real Estate [Line Items]
Properties under development or held for future development	16,400	16,400
Spring Vally Retail Center [Member]
Real Estate [Line Items]
Properties under development or held for future development	1,100
Office [Member]
Real Estate [Line Items]
Real estate investment property, at cost	1,349,378	1,554,334
Properties under development or held for future development	2,640	18,711
Multifamily [Member]
Real Estate [Line Items]
Real estate investment property, at cost	885,084	641,424
Properties under development or held for future development	36,013	16,307
Retail [Member]
Real Estate [Line Items]
Real estate investment property, at cost	450,941	442,039
Properties under development or held for future development	$ 1,579	$ 1,076

XML

Real Estate Investments - Schedule of Acquisitions (Details) $ in Thousands				12 Months Ended
	Oct. 02, 2014 USD ($) ft²	May 02, 2014 USD ($) ft²	Mar. 26, 2014 USD ($) ft²	Dec. 31, 2014 USD ($) ft² unit	Dec. 31, 2016 USD ($) unit	May 20, 2016 USD ($) unit	Dec. 31, 2015 USD ($) apartment	Jul. 01, 2015 USD ($) unit	Feb. 21, 2014 USD ($) unit
Real Estate [Line Items]
Units					4,480		506
Real estate investment property, at cost					$ 2,685,403		$ 2,637,797
Riverside Apartments [Member]
Real Estate [Line Items]
Units | unit					1,222	1,222
Wellington [Member]
Real Estate [Line Items]
Units | unit								711
Yale West [Member]
Real Estate [Line Items]
Units | unit					216				216
Property Acquired [Member]
Real Estate [Line Items]
Units | unit				216
Rentable Square Feet | ft²				368,000
Real estate investment property, at cost				$ 297,000
Property Acquired [Member] | Riverside Apartments [Member]
Real Estate [Line Items]
Real estate investment property, at cost						$ 244,750
Property Acquired [Member] | Wellington [Member]
Real Estate [Line Items]
Real estate investment property, at cost								$ 167,000
Property Acquired [Member] | Yale West [Member]
Real Estate [Line Items]
Real estate investment property, at cost									$ 73,000
Property Acquired [Member] | The Army Navy Club Building [Member]
Real Estate [Line Items]
Rentable Square Feet | ft²			108,000
Real estate investment property, at cost			$ 79,000
Property Acquired [Member] | 1775 Eye Street [Member]
Real Estate [Line Items]
Rentable Square Feet | ft²		185,000
Real estate investment property, at cost		$ 104,500
Property Acquired [Member] | Spring Vally Retail Center [Member]
Real Estate [Line Items]
Rentable Square Feet | ft²	75,000
Real estate investment property, at cost	$ 40,500

XML

Real Estate Investments - Revenue and Earnings of Acquisitions (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Real Estate [Line Items]
Real estate rental revenue	$ 76,952	$ 79,770	$ 79,405	$ 77,137	$ 79,102	$ 78,243	$ 74,226	$ 74,856	$ 313,264	$ 306,427	$ 288,637
Net income	$ 5,426	$ 79,662	$ 31,821	$ 2,379	$ 62,095	$ 580	$ (2,886)	$ 29,398	119,288	89,187	111,601
Property Acquired [Member]
Real Estate [Line Items]
Real estate rental revenue									13,112	6,797	16,260
Net income									$ (1,688)	$ (2,748)	$ (3,168)

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Real Estate Investments - Schedule of Physical Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Real Estate [Line Items]
Land	$ 38,924	$ 30,548	$ 104,403
Land held for development	15,968	15,000	0
Buildings	184,854	116,563	172,671
Tenant origination costs	0	0	9,377
Leasing commissions/absorption costs	4,992	4,889	16,474
Net lease intangible assets	22	0	7,331
Net lease intangible liabilities	10	0	8,323
Fair value of assumed mortgage	0	0	107,125
Furniture, fixtures & equipment	0	0	932
Property Acquired [Member]
Real Estate [Line Items]
Total	$ 244,750	$ 167,000	$ 195,740

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Real Estate Investments - Acquisition (Narrative) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($) note	Dec. 31, 2014 USD ($)
Real Estate [Line Items]
Payments to Acquire Real Estate	$ 227,413	$ 151,682	$ 194,536
Number of Mortgage Notes Assumed | note		2
Notes Assumed		$ 100,900
Net Lease Intangible Assets Member | Riverside Apartments [Member]
Real Estate [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	87 months
net lease intangible liability [Member] | Riverside Apartments [Member]
Real Estate [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	43 months
Property Acquired [Member]
Real Estate [Line Items]
Total	$ 244,750	167,000	195,740
Payments to Acquire Real Estate			194,500
Real Estate Investment Property, at Cost, Including Note Payable Assumed		297,000
Property Acquired [Member] | Riverside Apartments [Member]
Real Estate [Line Items]
Other Payments to Acquire Businesses		300
Property Acquired [Member] | Riverside Apartments land parcel [Member]
Real Estate [Line Items]
Payments to Acquire Land		15,000
Property Acquired [Member] | Wellington [Member]
Real Estate [Line Items]
Payments to Acquire Real Estate	227,400
Other Payments to Acquire Businesses	1,400
Property Acquired [Member] | The Wellington land parcel [Member]
Real Estate [Line Items]
Payments to Acquire Land	$ 16,000
Property Acquired [Member] | Yale West [Member]
Real Estate [Line Items]
Other Payments to Acquire Businesses			$ 3,600
Property Acquired [Member] | 1775 Eye Street [Member]
Real Estate [Line Items]
Other Payments to Acquire Businesses		$ 1,900

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Real Estate Investments - Pro Forma Schedule (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Real Estate [Abstract]
Real estate revenues	$ 321,386	$ 327,605
Net income	$ 127,439	$ 90,040
Diluted earnings per share (in dollars per share)	$ 1.76	$ 1.31

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Real Estate Investments - Variable Interest (Narrative) (Details) $ in Thousands		3 Months Ended	6 Months Ended	12 Months Ended
		Jun. 30, 2015 USD ($)	Jun. 30, 2011	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Nov. 30, 2011	Jun. 15, 2011	Aug. 31, 2007 a
Real Estate [Line Items]
Casualty (gain) and real estate impairment loss, net		$ (5,900)		$ (676)	$ 5,909	$ 0
Disposal Group, Including Discontinued Operation, Consideration				252,100	137,100	$ 195,161
Loans Payable				$ 144,485	414,546
Maximum [Member]
Real Estate [Line Items]
Ownership percentage				95.00%
4661 Kenmore Avenue [Member]
Real Estate [Line Items]
Land, Acres Held | a									0.8
1225 First Street [Member]
Real Estate [Line Items]
Ownership percentage by noncontrolling owners							5.00%
Six Fifty North Glebe Road [Member]
Real Estate [Line Items]
Ownership percentage			90.00%
Ownership percentage by noncontrolling owners								10.00%
Loans Payable	[1]			$ 0	32,248
Multifamily [Member] | 1225 First Street [Member]
Real Estate [Line Items]
Disposal Group, Including Discontinued Operation, Consideration	[2]				$ 14,500

[1] Interest rate on The Maxwell construction loan was variable, based on LIBOR plus 2.0%. Interest and principal was payable monthly starting March 2016 until the extended maturity date of February 20, 2017, upon which all unpaid principal and interest were payable in full. In January 2016, Washington REIT exercised its right to purchase the construction loan without penalty from the lender (see note 3, under "Variable Interest Entities").

[2] Interest in land held for future development.

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Real Estate Investments - Joint Venture on the Balance Sheet and Income Statement (Details) - USD ($) $ in Thousands	Dec. 31, 2016		Dec. 31, 2015
Real Estate [Line Items]
Land	$ 573,315		$ 561,256
Accumulated depreciation and amortization	657,425		692,608
Other assets	40,232		36,094
Mortgage notes payable, net	148,540		418,052
Accounts payable and other liabilities	46,967		45,367
Tenant security deposits	8,802		9,378
Six Fifty North Glebe Road [Member]
Real Estate [Line Items]
Land	12,851		12,851
Income producing property	37,949		37,791
Accumulated depreciation and amortization	4,571		2,347
Other assets	456		1,188
Real Estate Investments, Joint Ventures	46,685		49,483
Mortgage notes payable, net	31,869	[1]	32,214
Accounts payable and other liabilities	186		256
Tenant security deposits	99		82
Variable Interest Entity, Consolidated, Carrying Amount, Liabilities	$ 32,154		$ 32,552

[1] The mortgage notes payable balance as of December 31, 2016 is eliminated in consolidation due to the purchase of the loan by Washington REIT in January 2016.

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Real Estate Investments - Properties Sold (Narrative) (Details) $ in Thousands		3 Months Ended					12 Months Ended
		Sep. 30, 2016 USD ($)	Jun. 30, 2016 USD ($) ft²	Dec. 31, 2015 USD ($) ft²	Jun. 30, 2015 USD ($)	Mar. 31, 2015 USD ($)	Dec. 31, 2016 USD ($) ft² buildings Contracts	Dec. 31, 2015 USD ($) ft²	Dec. 31, 2014 USD ($) ft²
Real Estate [Line Items]
Disposal Group, Including Discontinued Operation, Consideration				$ 137,100			$ 252,100	$ 137,100	$ 195,161
Area of Real Estate Property | ft²				197,000			1,183,000	197,000	430,000
Gain on sale of real estate, continuing operations		$ 77,600	$ 24,100	$ 59,400	$ 1,500	$ 30,300	$ 101,704	$ 91,107	$ 570
Montrose Shopping Center [Member]
Real Estate [Line Items]
Area of Real Estate Property | ft²			15,000
Disposal Group, Including Discontinued Operation, Sale Price			$ 2,000
Gain on sale of real estate, continuing operations			$ 1,400
Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] | Dulles Station II [Member]
Real Estate [Line Items]
Gain on sale of real estate, continuing operations	[1]						$ 527
Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] | Maryland Portfolio [Member]
Real Estate [Line Items]
Number of Buildings Sold | buildings							6
Disposal Group, Held-for-sale or Disposed of by Sale, Not Discontinued Operations [Member] | Maryland Portfolio [Member]
Real Estate [Line Items]
Number of Purchase and Sale Agreements | Contracts							2
Office [Member] | Maryland Portfolio [Member]
Real Estate [Line Items]
Disposal Group, Including Discontinued Operation, Consideration							$ 240,000
Office [Member] | Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] | Dulles Station II [Member]
Real Estate [Line Items]
Disposal Group, Including Discontinued Operation, Consideration	[2]						$ 12,100

[1] Land held for future development and an interest in a parking garage.

[2] Land held for future development and an interest in a parking garage.

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Real Estate Investments - Schedule of Properties Sold (Details) $ in Thousands		3 Months Ended					12 Months Ended
		Sep. 30, 2016 USD ($)	Jun. 30, 2016 USD ($)	Dec. 31, 2015 USD ($) ft² apartment	Jun. 30, 2015 USD ($)	Mar. 31, 2015 USD ($)	Dec. 31, 2016 USD ($) ft² unit	Dec. 31, 2015 USD ($) ft² apartment	Dec. 31, 2014 USD ($) ft²
Real Estate [Line Items]
Units				506			4,480	506
Area of Real Estate Property | ft²				197,000			1,183,000	197,000	430,000
Disposal Group, Including Discontinued Operation, Consideration				$ 137,100			$ 252,100	$ 137,100	$ 195,161
Gain on sale of real estate, continuing operations		$ 77,600	$ 24,100	$ 59,400	$ 1,500	$ 30,300	101,704	91,107	570
Gain on sale of real estate, discontinued operations							0	0	105,985
Disposal Group, Including Discontinued Operation, Gain (Loss) on Disposal								89,653	106,555
Dulles Station II [Member] | Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member]
Real Estate [Line Items]
Gain on sale of real estate, continuing operations	[1]						527
Dulles Station II [Member] | Office [Member] | Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member]
Real Estate [Line Items]
Disposal Group, Including Discontinued Operation, Consideration	[2]						12,100
Maryland Office Portfolio Transaction I [Member] | Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member]
Real Estate [Line Items]
Gain on sale of real estate, continuing operations	[3]						$ 23,585
Maryland Office Portfolio Transaction I [Member] | Office [Member] | Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member]
Real Estate [Line Items]
Area of Real Estate Property | ft²							692,000
Disposal Group, Including Discontinued Operation, Consideration	[4]						$ 111,500
Maryland Office Portfolio Transaction II [Member] | Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member]
Real Estate [Line Items]
Gain on sale of real estate, continuing operations	[5]						$ 77,592
Maryland Office Portfolio Transaction II [Member] | Office [Member] | Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member]
Real Estate [Line Items]
Area of Real Estate Property | ft²							491,000
Disposal Group, Including Discontinued Operation, Consideration							$ 128,500
Country Club Towers [Member]
Real Estate [Line Items]
Gain on sale of real estate, continuing operations								$ 30,277
Country Club Towers [Member] | Multifamily [Member]
Real Estate [Line Items]
Units | apartment				227				227
Disposal Group, Including Discontinued Operation, Consideration				$ 37,800				$ 37,800
1225 First Street [Member]
Real Estate [Line Items]
Gain on sale of real estate, continuing operations	[6]							0
1225 First Street [Member] | Multifamily [Member]
Real Estate [Line Items]
Disposal Group, Including Discontinued Operation, Consideration	[7]			$ 14,500				14,500
Munson Hill Towers [Member]
Real Estate [Line Items]
Gain on sale of real estate, continuing operations								$ 51,395
Munson Hill Towers [Member] | Multifamily [Member]
Real Estate [Line Items]
Units | apartment				279				279
Disposal Group, Including Discontinued Operation, Consideration				$ 57,050				$ 57,050
Montgomery Village Center [Member]
Real Estate [Line Items]
Gain on sale of real estate, continuing operations								$ 7,981
Montgomery Village Center [Member] | Retail [Member]
Real Estate [Line Items]
Area of Real Estate Property | ft²				197,000				197,000
Disposal Group, Including Discontinued Operation, Consideration				$ 27,750				$ 27,750
Medical Office Portfolio Transactions III & IV [Member]
Real Estate [Line Items]
Gain on sale of real estate, discontinued operations	[8]								$ 105,985
Medical Office Portfolio Transactions III & IV [Member] | Medical Office Building [Member]
Real Estate [Line Items]
Area of Real Estate Property | ft²									427,000
Disposal Group, Including Discontinued Operation, Consideration	[9]								$ 193,561
5740 Columbia Road [Member]
Real Estate [Line Items]
Gain on sale of real estate, continuing operations									$ 570
5740 Columbia Road [Member] | Retail [Member]
Real Estate [Line Items]
Area of Real Estate Property | ft²									3,000
Disposal Group, Including Discontinued Operation, Consideration									$ 1,600

[1] Land held for future development and an interest in a parking garage.

[2] Land held for future development and an interest in a parking garage.

[3] Maryland Office Portfolio Transaction I consists of 6110 Executive Boulevard, 600 Jefferson Plaza, Wayne Plaza and West Gude Drive.

[4] Maryland Office Portfolio Transaction I consists of 6110 Executive Boulevard, 600 Jefferson Plaza, Wayne Plaza and West Gude Drive.

[5] Maryland Office Portfolio Transaction II consists of 51 Monroe Street and One Central Plaza.

[6] Interest in land held for future development.

[7] Interest in land held for future development.

[8] Medical Office Portfolio Transactions III & IV consist of Woodburn Medical Park I and II and Prosperity Medical Center I, II and III.

[9] These properties are classified as discontinued operations. All other sold properties are classified as continuing operations.

XML

Real Estate Investments - Real Estate Revenue (Details) $ / shares in Units, $ in Thousands	1 Months Ended	12 Months Ended
	Sep. 30, 2013 USD ($) buildings agreements	Dec. 31, 2016 USD ($) $ / shares	Dec. 31, 2015 USD ($) $ / shares	Dec. 31, 2014 USD ($) $ / shares
Real Estate [Line Items]
Disposal Group, Including Discontinued Operation, Rental Income		$ 20,266	$ 32,423	$ 31,811
Income (Loss) from Individually Significant Component Disposed of or Held-for-sale, Excluding Discontinued Operations, before Income Tax		9,376	9,848	9,352
Net income		0	0	106,531
Income from properties sold or held for sale		0	0	546
Discontinued Properties Member
Real Estate [Line Items]
Real estate revenues		0	0	892
Disposal Group, Including Discontinued Operation, Operating Expense		0	0	346
Medical Office Porfolio [Member]
Real Estate [Line Items]
Number of Purchase and Sale Agreements | agreements	4
Disposal Group, Including Discontinued Operation, Sale Price	$ 500,800
Real estate revenues		0	0	892
Net income		$ 0	$ 0	$ 546
Discontinued operations (in dollars per share) | $ / shares		$ 0.00	$ 0.00	$ 0.01
Office [Member] | Medical Office Porfolio [Member]
Real Estate [Line Items]
Number of Buildings Sold | buildings	2

XML

Real Estate Investments - Casualty Gains (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Jun. 30, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Real Estate [Line Items]
Casualty (gain) and real estate impairment (loss), net	$ (5,900)	$ (676)	$ 5,909	$ 0
Insurance proceeds		883	0	$ 0
Rents and other receivables, net of allowance for doubtful accounts of $2,377 and $2,297, respectively		64,319	$ 62,890
Bethesda Hill Apartments [Member]
Real Estate [Line Items]
Casualty (gain) and real estate impairment (loss), net		700
Insurance proceeds		900
Rents and other receivables, net of allowance for doubtful accounts of $2,377 and $2,297, respectively		$ 200

XML

Mortgage Notes Payable (Details) $ in Thousands		1 Months Ended	12 Months Ended
		Feb. 28, 2017 USD ($)	Dec. 31, 2016 USD ($) buildings		Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
Mortgage Loans on Real Estate [Line Items]
Collateral for mortgage notes payable | buildings			1
Loans Payable			$ 144,485		$ 414,546
Mortgage notes payable, net			148,540		418,052
Carrying Amount, Mortgaged Properties			280,400		619,400
Repayments of Secured Debt			$ 270,061		4,512	$ 3,954
The Army Navy Club Building [Member]
Mortgage Loans on Real Estate [Line Items]
Debt Instrument, Issuance Date	[1],[2]		Mar. 26, 2014
Effective interest rate percentage	[2],[3]		3.18%
Loans Payable	[2]		$ 49,618		50,750
Debt Instrument, Maturity Date	[2]		Feb. 01, 2017
Yale West [Member]
Mortgage Loans on Real Estate [Line Items]
Debt Instrument, Issuance Date	[1],[4]		Feb. 21, 2014
Effective interest rate percentage	[3],[4]		3.75%
Loans Payable	[4]		$ 47,078		47,502
Debt Instrument, Maturity Date	[4]		Jan. 31, 2022
Six Fifty North Glebe Road [Member]
Mortgage Loans on Real Estate [Line Items]
Debt Instrument, Issuance Date	[1],[5]		Feb. 21, 2013
Effective interest rate percentage	[3],[5]		2.27%
Loans Payable	[5]		$ 0		32,248
Debt Instrument, Maturity Date	[5]		Jan. 27, 2016
Mortgage notes payable, net			$ 31,869	[6]	32,214
John Marshall II Member
Mortgage Loans on Real Estate [Line Items]
Debt Instrument, Issuance Date	[1],[7]		Sep. 15, 2011
Effective interest rate percentage	[3],[7]		5.79%
Loans Payable	[7]		$ 0		51,011
Debt Instrument, Maturity Date	[7]		Feb. 08, 2016
Olney Village Center Member
Mortgage Loans on Real Estate [Line Items]
Debt Instrument, Issuance Date	[1]		Aug. 30, 2011
Effective interest rate percentage	[3]		4.94%
Loans Payable			$ 14,851		16,503
Debt Instrument, Maturity Date			Oct. 01, 2023
Kenmore Apartments [Member]
Mortgage Loans on Real Estate [Line Items]
Debt Instrument, Issuance Date	[1]		Feb. 02, 2009
Effective interest rate percentage	[3]		5.37%
Loans Payable			$ 32,938		33,637
Debt Instrument, Maturity Date			Mar. 01, 2019
2445 M Street [Member]
Mortgage Loans on Real Estate [Line Items]
Debt Instrument, Issuance Date	[1],[8]		Dec. 02, 2008
Effective interest rate percentage	[3],[8]		7.25%
Loans Payable	[8]		$ 0		101,866
Debt Instrument, Maturity Date	[8]		Oct. 06, 2016
3801 Connecticut, Walker House, Bethesda Hill [Member]
Mortgage Loans on Real Estate [Line Items]
Debt Instrument, Issuance Date	[1],[9]		May 29, 2008
Effective interest rate percentage	[3],[9]		5.71%
Loans Payable	[9]		$ 0		81,029
Debt Instrument, Maturity Date	[9]		Jun. 01, 2016
London Interbank Offered Rate (LIBOR) [Member] | Six Fifty North Glebe Road [Member]
Mortgage Loans on Real Estate [Line Items]
Spread on variable rate			2.00%
Mortgage payable
Mortgage Loans on Real Estate [Line Items]
Debt Instrument, Unamortized Discount (Premium), Net			$ 4,354		4,175
Deferred Finance Costs, Net			$ 299		$ 669
Subsequent Event [Member] | The Army Navy Club Building [Member]
Mortgage Loans on Real Estate [Line Items]
Repayments of Secured Debt		$ 49,600

[1] Each of these mortgages was assumed with the acquisition of the collateralized properties, except for the mortgage notes secured by 3801 Connecticut Avenue, Walker House, Bethesda Hill, Kenmore Apartments, and the construction loan secured by the development project at The Maxwell, which were originally executed by Washington REIT. We record mortgages assumed in an acquisition at fair value.

[2] The note was prepaid without penalty in February 2017.

[3] Yield on the assumption/issuance date, including the effects of any premiums, discounts or fair value adjustments on the notes.

[4] The maturity date of the mortgage note is January 1, 2052, but can be prepaid, without penalty, beginning on January 31, 2022.

[5] Interest rate on The Maxwell construction loan was variable, based on LIBOR plus 2.0%. Interest and principal was payable monthly starting March 2016 until the extended maturity date of February 20, 2017, upon which all unpaid principal and interest were payable in full. In January 2016, Washington REIT exercised its right to purchase the construction loan without penalty from the lender (see note 3, under "Variable Interest Entities").

[6] The mortgage notes payable balance as of December 31, 2016 is eliminated in consolidation due to the purchase of the loan by Washington REIT in January 2016.

[7] The note was prepaid without penalty in February 2016.

[8] Interest only was payable monthly until the note was prepaid without penalty in October 2016.

[9] Interest only was payable monthly until the note was repaid without penalty in June 2016.

XML

Mortgage Notes Payable - Scheduled Principal Payments (Details) $ in Thousands	Dec. 31, 2016 USD ($)
Notes Payable, Noncurrent [Abstract]
2017	$ 52,571
2018	3,135
2019	33,909
2020	2,659
2021	2,829
Thereafter	49,382
Total principal	$ 144,485

XML

Unsecured Lines Of Credit Payable - Narrative (Details)		9 Months Ended	12 Months Ended
	Jun. 23, 2015	Sep. 30, 2016	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Jul. 21, 2016	Sep. 15, 2015
Line of Credit Facility [Line Items]
Total revolving credit facilities at December 31			$ 600,000,000	$ 600,000,000	$ 500,000,000
Weighted average interest rate during the year			1.52%	1.35%	1.53%
U.S. Covered Terrorism Losses, Percent			0.85
Insurance Provider, Covered Terrorism Losses, Percent			0.10
Aggregate Insurance Limit For Terrorism Losses			$ 100,000,000,000
Line of Credit [Member]
Line of Credit Facility [Line Items]
Weighted average interest rate during the year		1.00%
Line of Credit Facility, Commitment Fee Percentage		0.20%
Credit Facility No 1 [Member]
Line of Credit Facility [Line Items]
Total revolving credit facilities at December 31			100,000,000
Credit Facility No 2 [Member]
Line of Credit Facility [Line Items]
Total revolving credit facilities at December 31			400,000,000
credit facility 2015 [Member]
Line of Credit Facility [Line Items]
Total revolving credit facilities at December 31			1,000,000,000
credit facility 2015 [Member] | Line of Credit [Member]
Line of Credit Facility [Line Items]
Total revolving credit facilities at December 31			$ 600,000,000
line of credit facility, number of extensions allowed			2
Line of Credit Facility, extension period			6 months
credit facility 2015 [Member] | 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
London Interbank Offered Rate (LIBOR) [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Variable Rate			0.77%
London Interbank Offered Rate (LIBOR) [Member] | Line of Credit [Member]
Line of Credit Facility [Line Items]
Spread on variable rate	1.00%
London Interbank Offered Rate (LIBOR) [Member] | 2015 Term Loan [Member]
Line of Credit Facility [Line Items]
Spread on variable rate			1.10%
Federal Funds Effective Swap Rate [Member] | Line of Credit [Member]
Line of Credit Facility [Line Items]
Spread on variable rate	0.50%
Interest Rate Swap [Member]
Line of Credit Facility [Line Items]
Derivative, Number of Instruments Held			2			2	2
Effective interest rate percentage			2.70%
Minimum [Member] | Line of Credit [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Commitment Fee Percentage	0.125%
Minimum [Member] | London Interbank Offered Rate (LIBOR) [Member] | Line of Credit [Member]
Line of Credit Facility [Line Items]
Spread on variable rate	0.875%
Minimum [Member] | Base Rate [Member] | Line of Credit [Member]
Line of Credit Facility [Line Items]
Spread on variable rate	0.00%
Maximum [Member] | Line of Credit [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Commitment Fee Percentage	0.30%
Maximum [Member] | London Interbank Offered Rate (LIBOR) [Member] | Line of Credit [Member]
Line of Credit Facility [Line Items]
Spread on variable rate	1.55%
Maximum [Member] | Base Rate [Member] | Line of Credit [Member]
Line of Credit Facility [Line Items]
Spread on variable rate	0.55%

XML

Unsecured Lines Of Credit Payable - Revolving Line of Credit (Details) - USD ($)	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Line of Credit Facility [Line Items]
Committed capacity	$ 600,000,000	$ 600,000,000	$ 500,000,000
Borrowings outstanding	120,000,000	105,000,000	$ 50,000,000
credit facility 2015 [Member]
Line of Credit Facility [Line Items]
Committed capacity	1,000,000,000
credit facility 2015 [Member] | Line of Credit [Member]
Line of Credit Facility [Line Items]
Committed capacity	600,000,000
Borrowings outstanding	120,000,000	$ 105,000,000
Unused and available	$ 480,000,000

XML

Unsecured Lines Of Credit Payable - Repayment of Revolving Credit Facility (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2016 USD ($)
Line of Credit Facility, Amount Outstanding [Roll Forward]
Long-term Line of Credit	$ 105,000
Long-term Line of Credit	120,000
credit facility 2015 [Member] | Line of Credit [Member]
Line of Credit Facility, Amount Outstanding [Roll Forward]
Long-term Line of Credit	105,000
Proceeds from Lines of Credit	651,000
Repayments of Lines of Credit	636,000
Long-term Line of Credit	$ 120,000

XML

Unsecured Lines Of Credit Payable - Recognized Interest Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Unsecured Debt [Abstract]
Line of Credit Facility, Periodic Payment, Interest	$ 3,272	$ 2,266	$ 196
Line of Credit Facility, Commitment Fee Amount	$ 1,220	$ 1,241	$ 1,267

XML

Unsecured Lines Of Credit Payable - Revolving Credit Facility (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Unsecured Debt [Abstract]
Total revolving credit facilities at December 31	$ 600,000	$ 600,000	$ 500,000
Borrowings outstanding	120,000	105,000	50,000
Weighted average daily borrowings during the year	214,962	167,573	12,849
Maximum daily borrowings during the year	$ 358,000	$ 350,000	$ 55,000
Weighted average interest rate during the year	1.52%	1.35%	1.53%
Weighted average interest rate on borrowings outstanding at December 31	1.64%	1.362%	1.369%

XML

Notes Payable (Details) - USD ($)		3 Months Ended	12 Months Ended
		Mar. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Notes Payable			$ 843,084,000	$ 743,181,000
Total principal			144,485,000
Debt Instrument, Periodic Payment, Principal			0
Proceeds from term loan			100,000,000	$ 150,000,000	$ 0
Notes payable
Debt Instrument [Line Items]
Notes Payable			843,084,000
Total principal			850,000,000
Net unamortized discount			(1,971,000)
Debt Issuance Cost			$ (4,945,000)
Notes payable | 10 Year Unsecured Notes 5.053% [Member]
Debt Instrument [Line Items]
Coupon stated rate			4.95%
Effective interest rate percentage	[1]		5.05%
Notes Payable			$ 250,000,000
Debt Instrument, Maturity Date	[2]		Oct. 01, 2020
Notes payable | 2015 Term Loan [Member]
Debt Instrument [Line Items]
Effective interest rate percentage	[1]		2.72%
Long-term Line of Credit, Noncurrent			$ 150,000,000
Debt Instrument, Maturity Date			Mar. 15, 2021
Notes payable | 10 Year Unsecured Notes 3.950 % [Member]
Debt Instrument [Line Items]
Coupon stated rate			3.95%
Effective interest rate percentage	[1]		4.02%
Notes Payable			$ 300,000,000
Debt Instrument, Maturity Date	[2]		Oct. 15, 2022
Notes payable | 2016 Term Loan [Member]
Debt Instrument [Line Items]
Effective interest rate percentage	[1]		2.86%
Long-term Line of Credit, Noncurrent			$ 100,000,000
Debt Instrument, Maturity Date	[2]		Jul. 21, 2023
Debt Instrument, Term			7 years
Debt Instrument, Face Amount			$ 150,000,000
Debt Instrument, Deferred Draw Period			6 months
Proceeds from term loan			$ 100,000,000
Notes payable | 30 Year Unsecured Notes [Member]
Debt Instrument [Line Items]
Coupon stated rate			7.25%
Effective interest rate percentage	[1]		7.36%
Notes Payable			$ 50,000,000
Debt Instrument, Maturity Date	[2]		Feb. 25, 2028
London Interbank Offered Rate (LIBOR) [Member] | 2016 Term Loan [Member]
Debt Instrument [Line Items]
Spread on variable rate			1.00%
London Interbank Offered Rate (LIBOR) [Member] | Notes payable | 2016 Term Loan [Member]
Debt Instrument [Line Items]
Spread on variable rate			1.65%
London Interbank Offered Rate (LIBOR) [Member] | 2015 Term Loan [Member]
Debt Instrument [Line Items]
Spread on variable rate			1.10%
Federal Funds Effective Swap Rate [Member] | 2016 Term Loan [Member]
Debt Instrument [Line Items]
Spread on variable rate			0.50%
Minimum [Member] | London Interbank Offered Rate (LIBOR) [Member] | 2016 Term Loan [Member]
Debt Instrument [Line Items]
Spread on variable rate			1.50%
Minimum [Member] | Base Rate [Member] | 2016 Term Loan [Member]
Debt Instrument [Line Items]
Spread on variable rate			0.50%
Maximum [Member] | London Interbank Offered Rate (LIBOR) [Member] | 2016 Term Loan [Member]
Debt Instrument [Line Items]
Spread on variable rate			2.45%
Maximum [Member] | Base Rate [Member] | 2016 Term Loan [Member]
Debt Instrument [Line Items]
Spread on variable rate			1.45%
Subsequent Event [Member] | Notes payable | 2016 Term Loan [Member]
Debt Instrument [Line Items]
Proceeds from term loan		$ 50,000,000

[1] For fixed rate notes, the effective rate represents the yield on issuance date, including the effects of discounts on the notes. For variable rate notes, the effective rate represents the rate as fixed by interest rate derivatives (see note 7).

[2] No principal amounts are due prior to maturity.

XML

Notes Payable - Maturities of Notes Payable (Details) $ in Thousands	Dec. 31, 2016 USD ($)
Long-term Debt of Registrant, Maturities, Repayments of Principal, Fiscal Year Maturity [Abstract]
2017	$ 52,571
2018	3,135
2019	33,909
2020	2,659
2021	2,829
Thereafter	49,382
Total principal	144,485
Notes payable
Long-term Debt of Registrant, Maturities, Repayments of Principal, Fiscal Year Maturity [Abstract]
2017	0
2018	0
2019	0
2020	250,000
2021	150,000
Thereafter	450,000
Total principal	$ 850,000

XML

Derivative Instruments - Narrative (Details)		12 Months Ended
		Dec. 31, 2016 USD ($) Rate	Jul. 21, 2016	Sep. 15, 2015
Derivative [Line Items]
Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net		$ 1,200,000
Interest Rate Swap [Member]
Derivative [Line Items]
Derivative, Number of Instruments Held		2	2	2
Derivative, Notional Amount		$ 300,000,000
Effective interest rate percentage		2.70%
Swap [Member]
Derivative [Line Items]
Fair Value Hedge Assets		$ 7,600,000
2015 Term Loan [Member] | Interest Rate Swap [Member]
Derivative [Line Items]
Derivative, Notional Amount		$ 150,000,000
Effective interest rate percentage | Rate		2.70%
2016 Term Loan [Member] | Interest Rate Swap [Member]
Derivative [Line Items]
Derivative, Notional Amount		$ 150,000,000
Effective interest rate percentage	[1]	2.86%
Debt Instrument, Maturity Date		Jul. 21, 2023
Unsecured Debt [Member] | 2015 Term Loan [Member]
Derivative [Line Items]
Effective interest rate percentage	[1]	2.72%
Debt Instrument, Maturity Date		Mar. 15, 2021
Unsecured Debt [Member] | 2016 Term Loan [Member]
Derivative [Line Items]
Effective interest rate percentage	[1]	2.86%
Debt Instrument, Maturity Date	[2]	Jul. 21, 2023

[1] For fixed rate notes, the effective rate represents the yield on issuance date, including the effects of discounts on the notes. For variable rate notes, the effective rate represents the rate as fixed by interest rate derivatives (see note 7).

[2] No principal amounts are due prior to maturity.

XML

Derivative Instruments - Schedule of Derivatives (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Derivative [Line Items]
Derivative Liability	$ 0	$ 550,000
Interest Rate Swap [Member]
Derivative [Line Items]
Derivative, Notional Amount	300,000,000
Derivative Asset	7,611,000
Derivative Liability	0	550,000
Swap [Member]
Derivative [Line Items]
Unrealized Gain (Loss) on Derivatives	7,611,000	(550,000)	$ 0
2015 Term Loan [Member] | Interest Rate Swap [Member]
Derivative [Line Items]
Derivative, Notional Amount	150,000,000
2016 Term Loan [Member] | Interest Rate Swap [Member]
Derivative [Line Items]
Derivative, Notional Amount	150,000,000
Accounts Payable and Other Liabilities [Member] | Interest Rate Swap [Member]
Derivative [Line Items]
Derivative Asset	7,611,000	0
Accounts Payable and Other Liabilities [Member] | 2015 Term Loan [Member] | Interest Rate Swap [Member]
Derivative [Line Items]
Derivative Asset	417,000	0
Derivative Liability	0	$ 550,000
Accounts Payable and Other Liabilities [Member] | 2016 Term Loan [Member] | Interest Rate Swap [Member]
Derivative [Line Items]
Derivative Asset	$ 7,194,000

XML

Fair Value Disclosures (Financial Assets And Liabilities Measured At Fair Value) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
SERP	$ 1,407	$ 1,408
Derivative Liability	$ 0	550
Cash and Cash Equivalents and Restricted Cash Maturity Period	90 days
Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
SERP	$ 0	0
Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
SERP	1,407	1,408
Level 3 [Member]
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]
Derivative Asset	7,611
Derivative Liability	0	550
Interest Rate Swap [Member] | Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative Asset	0
Derivative Liability	0	0
Interest Rate Swap [Member] | Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative Asset	7,611
Derivative Liability	0	550
Interest Rate Swap [Member] | Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative Asset	0
Derivative Liability	$ 0	$ 0

XML

Fair Value Disclosures (Financial Assets And Liabilities Not Measured At Fair Value) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	$ 11,305	$ 23,825	$ 15,827	$ 130,343
Restricted cash	6,317	13,383
Carrying (Reported) Amount, Fair Value Disclosure [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents		23,825
Restricted cash		13,383
Mortgage notes payable	148,540	418,052
Lines of credit payable	120,000	105,000
Notes payable	843,084	743,181
Estimate of Fair Value, Fair Value Disclosure [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	11,305	23,825
Restricted cash	6,317	13,383
Mortgage notes payable	149,997	426,693
Lines of credit payable	120,000	105,000
Notes payable	873,516	753,816
2445 M Street [Member] | Carrying (Reported) Amount, Fair Value Disclosure [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
2445 M Street note receivable	2,089	3,849
2445 M Street [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
2445 M Street note receivable	$ 2,173	$ 4,275

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Stock Based Compensation - (Narrative) (Details)	12 Months Ended
	Dec. 31, 2016 shares
Washington Real Estate Investment Trust 2016 Omnibus Long Term Incentive Plan [Domain]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized	2,400,000
Washington Real Estate Investment Trust 2007 Omnibus Long Term Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized	2,000,000
Plan in effect, period	10 years
Options outstanding	0

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Stock Based Compensation - Short Term and Long-Term Incentive Plan (Narrative) (Details)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
New STIP [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance period	1 year
Percentage of Potential Award Based Upon Service Requirement	50.00%
Share-based Compensation Arrangements by Share-based Payment Awards, Options, Vested after Performance Period, Percentage	50.00%
New STIP [Member] | Performance-Based Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	3 years
New LTIP [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage payable In unrestricted shares	75.00%
Percentage payable in restricted shares	25.00%
Performance period	3 years
Award vesting period	3 years
Grant Date Fair Value as a Percentage of Base Salary on absolute TSR	50.00%	50.00%	50.00%
Grant Date Fair Value as a Percentage of Base Salary on relative TSR	50.00%	50.00%	50.00%
Grant date fair value as a percentage of base salary	150.00%
Total compensation cost not yet recognized, period for recognition	4 years
Weighting for performance measurement based on cumulative 3-Year total shareholder return	50.00%
Weighting for performance measurement based on 20 peer comapnies	50.00%
New LTIP [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant Date Fair Value as a Percentage of Base Salary on absolute TSR	17.00%	13.00%	24.00%
Grant Date Fair Value as a Percentage of Base Salary on relative TSR	38.00%	40.00%	42.00%
Grant date fair value as a percentage of base salary	80.00%
New LTIP [Member] | Minimum [Member] | Share-based Compensation Award, Tranche One [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant Date Fair Value as a Percentage of Base Salary on absolute TSR			10.00%
Grant Date Fair Value as a Percentage of Base Salary on relative TSR			11.00%
New LTIP [Member] | Minimum [Member] | Share-based Compensation Award, Tranche Two [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant Date Fair Value as a Percentage of Base Salary on absolute TSR			16.00%
Grant Date Fair Value as a Percentage of Base Salary on relative TSR			23.00%
New LTIP [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant Date Fair Value as a Percentage of Base Salary on absolute TSR	30.00%	29.00%	38.00%
Grant Date Fair Value as a Percentage of Base Salary on relative TSR	66.00%	69.00%	67.00%
New LTIP [Member] | Maximum [Member] | Share-based Compensation Award, Tranche One [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant Date Fair Value as a Percentage of Base Salary on absolute TSR			20.00%
Grant Date Fair Value as a Percentage of Base Salary on relative TSR			20.00%
New LTIP [Member] | Maximum [Member] | Share-based Compensation Award, Tranche Two [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant Date Fair Value as a Percentage of Base Salary on absolute TSR			30.00%
Grant Date Fair Value as a Percentage of Base Salary on relative TSR			43.00%
Cash [Member] | New STIP [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage payable In unrestricted shares	100.00%
Cash [Member] | New STIP [Member] | Performance-Based Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage payable In unrestricted shares	50.00%
Restricted Share Units [Member] | New STIP [Member] | Performance-Based Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage payable in restricted shares	50.00%
Restricted Share Units [Member] | New LTIP [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance period	1 year
Restricted Share Units [Member] | New LTIP [Member] | Performance-Based Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total compensation cost not yet recognized, period for recognition	4 years
Unrestricted Share Awards [Member] | New LTIP [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total compensation cost not yet recognized, period for recognition	3 years

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Stock Based Compensation - Assumptions for LTIP Awards (Details) - New LTIP [Member] - $ / shares		12 Months Ended
		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Apr. 23, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected Volatility Rate				23.20%
Risk Free Interest Rate				0.80%
Share price at grant date					$ 24.08
Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected Volatility Rate	[1]	17.20%	17.20%
Risk Free Interest Rate	[2]	1.00%	1.00%
Expected Term	[3]	3 years	3 years	3 years
Share price at grant date		$ 27.66	$ 27.66
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected Volatility Rate	[1]	17.50%	17.50%
Risk Free Interest Rate	[2]	1.10%	1.10%
Expected Term	[3]	4 years	4 years	4 years
Share price at grant date		$ 27.76	$ 27.76

[1] Expected volatility based upon historical volatility of our daily closing share price.

[2] Risk-free interest rate based on U.S. treasury constant maturity bonds on the measurement date with a maturity equal to the market condition performance period.

[3] Expected term based on the market condition performance period.

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Stock Based Compensation - Trustee Awards and Total Compensation Expense (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Share-based Compensation [Abstract]
Trustee share-based compensation	$ 100,000	$ 100,000	$ 55,000
Share-based Compensation Arrangement by Share-based Payment Award Accelerated Compensation Cost	3,500,000	5,100,000	$ 5,000,000
Capitalized Share-based Compensation During Period	$ 100,000	$ 600,000

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Stock Based Compensation - Restricted Share Awards with Performance and Service Conditions (Details) - Restricted Share Awards [Member] - $ / shares	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Other Than Options, Nonvested, Number, Beginning	106,144	93,667	129,815
Other Than Options, Granted	251,694	251,642	210,817
Other Than Options, Vested During Year	(211,771)	(212,856)	(236,498)
Other Than Options, Forfeited	(38,368)	(26,309)	(10,467)
Other Than Options, Nonvested, Number, Beginning	107,699	106,144	93,667
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Other Than Options, Nonvested, Weighted Average Grant Date Fair Value	$ 27.71	$ 25.22	$ 27.06
Other Than Options, Granted, Weighted Average Grant Date Fair Value	26.01	27.80	23.93
Other Than Options, Vested During Year, Weighted Average Grant Date Fair Value	29.21	27.18	25.06
Other Than Options, Forfeited, Weighted Average Grant Date Fair Value	26.14	26.77	25.80
Other Than Options, Nonvested, Weighted Average Grant Date Fair Value	$ 26.47	$ 27.71	$ 25.22

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Stock Based Compensation - Restricted Share Awards with Performance and Service Conditions (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of restricted share units vested	$ 6.2	$ 5.8	$ 6.1
Restricted Share Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized	$ 1.9
Total compensation cost not yet recognized, period for recognition	20 months

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Stock Based Compensation - Restricted and Unrestricted Shares with Market Conditions (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Relative TSR [Member] | Restricted Share Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted and Unrestricted Share Awards, Grant Date Fair Value	$ 182	$ 191	$ 458
Unamortized Value Of Restricted and Unrestricted Shares	117	83	33
Relative TSR [Member] | Unrestricted Share Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted and Unrestricted Share Awards, Grant Date Fair Value	546	634	1,376
Unamortized Value Of Restricted and Unrestricted Shares	314	165	0
Absolute TSR [Member] | Restricted Share Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted and Unrestricted Share Awards, Grant Date Fair Value	82	76	327
Unamortized Value Of Restricted and Unrestricted Shares	53	33	19
Absolute TSR [Member] | Unrestricted Share Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted and Unrestricted Share Awards, Grant Date Fair Value	246	254	921
Unamortized Value Of Restricted and Unrestricted Shares	$ 142	$ 66	$ 0

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Other Benefit Plans (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
401I(k) plan contributions by employer	$ 0.4	$ 0.5	$ 0.4
Other Postretirement Defined Benefit Plan, Liabilities, Noncurrent	0.9	1.7
Pension and Other Postretirement Benefit Expense	0.2	0.3	$ 0.3
Officer [Member]
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Accrued benefit liability	$ 1.3	$ 1.4

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Earnings Per Common Share - Computation Of Basic And Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended																12 Months Ended
	Dec. 31, 2016	[1]	Sep. 30, 2016	[1],[2]	Jun. 30, 2016	[1],[2]	Mar. 31, 2016	[1]	Dec. 31, 2015	[1],[2]	Sep. 30, 2015	[1]	Jun. 30, 2015	[1],[2],[3]	Mar. 31, 2015	[1],[2]	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Income from continuing operations																	$ 119,288	$ 89,187	$ 5,070
Less: Net loss attributable to noncontrolling interests in subsidiaries																	(51)	(553)	(38)
Allocation of undistributed earnings to unvested restricted share awards and units to continuing operations																	310	269	(5)
Adjusted income from continuing operations attributable to the controlling interests																	119,029	89,471	5,075
Income from discontinued operations, including gain on sale of real estate, net of taxes																	0	0	106,531
Allocation of undistributed earnings to unvested restricted share awards and units to discontinued operations																	0	0	(322)
Adjusted income from discontinued operations attributable to the controlling interests																	0	0	106,247
Adjusted net income attributable to the controlling interests																	$ 119,029	$ 89,471	$ 111,322
Weighted average shares outstanding – basic																	72,163	68,177	66,795
Employee stock options and restricted share awards																	176	133	42
Weighted average shares outstanding - diluted																	72,339	68,310	66,837
Continuing operations																	$ 1.65	$ 1.31	$ 0.08
Discontinued operations (in dollars per share)																	0.00	0.00	1.59
Basic earnings: Adjusted net income attributable to the controlling interests (in dollars per share)	$ 0.07		$ 1.07		$ 0.44		$ 0.03		$ 0.91		$ 0.01		$ (0.04)		$ 0.43		1.65	1.31	1.67
Continuing operations																	1.65	1.31	0.08
Discontinued operations (in dollars per share)																	0.00	0.00	1.59
Net income per share, diluted (in dollars per share)	$ 0.07		$ 1.07		$ 0.44		$ 0.03		$ 0.91		$ 0.01		$ (0.04)		$ 0.43		1.65	1.31	1.67
Common Stock, Dividends, Per Share, Declared																	$ 1.20	$ 1.20	$ 1.20
Continuing Operations [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Less: Net loss attributable to noncontrolling interests in subsidiaries																	$ 51	$ 553	$ 0
Discontinued Operations [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Less: Net loss attributable to noncontrolling interests in subsidiaries																	$ 0	$ 0	$ 38

[1] With regard to per share calculations, the sum of the quarterly results may not equal full year results due to rounding.

[2] The second and third quarters of 2016 include gains on sale of real estate classified as continued operations of $24.1 million and $77.6 million, respectively. The first, second and fourth quarters of 2015 include gains on sale of real estate classified as continuing operations of $30.3 million, $1.5 million and $59.4 million, respectively.

[3] The second quarter of 2015 includes a real estate impairment of $5.9 million.

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Rentals Under Operating Leases (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Operating Leased Assets [Line Items]
Tenant Reimbursements	$ 35,200	$ 34,600	$ 31,600
2016	172,783
2017	153,100
2018	141,158
2019	126,193
2020	100,887
Thereafter	327,421
Operating Leases, Future Minimum Payments Receivable	$ 1,021,542
Multifamily Properties [Member]
Operating Leased Assets [Line Items]
Lessee Leasing Arrangements, Operating Leases, Term of Contract	1 year

XML

Commitments and Contingencies (Details)	12 Months Ended
	Dec. 31, 2016 Contracts
Commitments and Contingencies Disclosure [Abstract]
Development Contracts with Third Parties, Number	0

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Segment Information (Details) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016 USD ($)	Sep. 30, 2016 USD ($)	Jun. 30, 2016 USD ($)	Mar. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Sep. 30, 2015 USD ($)	Jun. 30, 2015 USD ($)	Mar. 31, 2015 USD ($)	Dec. 31, 2016 USD ($) segment	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
Segment Reporting Information [Line Items]
Number of Reportable Segments | segment									3
Real estate rental revenue	$ 76,952	$ 79,770	$ 79,405	$ 77,137	$ 79,102	$ 78,243	$ 74,226	$ 74,856	$ 313,264	$ 306,427	$ 288,637
Real estate expenses									115,013	112,234	103,695
Net operating income									198,251	194,193	184,942
Depreciation and amortization									(108,406)	(108,935)	(96,011)
General and administrative									(19,545)	(20,123)	(19,644)
Casualty (gain) and real estate impairment (loss), net							5,900		676	(5,909)	0
Acquisition costs									(1,178)	(2,056)	(5,710)
Interest expense									(53,126)	(59,546)	(59,785)
Other income									297	709	825
Gain on sale of real estate, continuing operations		77,600	24,100		59,400		1,500	30,300	101,704	91,107	570
Income tax benefit (expense)									615	(134)	(117)
Loss on extinguishment of debt									0	(119)	0
Income from properties sold or held for sale									0	0	546
Gain on sale of real estate, discontinued operations									0	0	105,985
Net income	5,426	79,662	31,821	2,379	62,095	580	(2,886)	29,398	119,288	89,187	111,601
Less: Net loss attributable to noncontrolling interests in subsidiaries									(51)	(553)	(38)
Net income attributable to the controlling interests	5,445	$ 79,674	$ 31,836	$ 2,384	62,133	$ 647	$ (2,546)	$ 29,506	119,339	89,740	111,639
Capital expenditures									58,014	43,636	59,529
Total assets	2,253,619				2,191,168				$ 2,253,619	$ 2,191,168	$ 2,108,317
Office [Member]
Segment Reporting Information [Line Items]
Real estate rental revenue as a percentage of total									0.53	0.57	0.57
Percentage of total income producing real estate assets									0.50	0.59
Real estate rental revenue									$ 165,934	$ 174,378	$ 166,116
Real estate expenses									64,405	67,228	63,903
Net operating income									101,529	107,150	102,213
Capital expenditures									30,337	29,745	43,128
Total assets	1,104,589				1,265,570				$ 1,104,589	$ 1,265,570	$ 1,283,950
Retail [Member]
Segment Reporting Information [Line Items]
Real estate rental revenue as a percentage of total									0.20	0.21	0.21
Percentage of total income producing real estate assets									0.17	0.17
Real estate rental revenue									$ 61,566	$ 63,507	$ 60,263
Real estate expenses									15,860	15,606	14,022
Net operating income									45,706	47,901	46,241
Capital expenditures									8,821	3,897	5,496
Total assets	352,056				354,123				$ 352,056	$ 354,123	$ 385,074
Multifamily [Member]
Segment Reporting Information [Line Items]
Real estate rental revenue as a percentage of total									0.27	0.22	0.22
Percentage of total income producing real estate assets									0.33	0.24
Real estate rental revenue									$ 85,764	$ 68,542	$ 62,258
Real estate expenses									34,748	29,400	25,770
Net operating income									51,016	39,142	36,488
Capital expenditures									17,936	7,865	9,186
Total assets	762,695				529,773				762,695	529,773	408,114
Corporate And Other [Member]
Segment Reporting Information [Line Items]
Real estate rental revenue									0	0	0
Real estate expenses									0	0	0
Net operating income									0	0	0
Capital expenditures									920	2,129	1,719
Total assets	$ 34,279				$ 41,702				$ 34,279	$ 41,702	$ 31,179

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Selected Quarterly Financial Data (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended																12 Months Ended
	Dec. 31, 2016		Sep. 30, 2016		Jun. 30, 2016		Mar. 31, 2016		Dec. 31, 2015		Sep. 30, 2015		Jun. 30, 2015		Mar. 31, 2015		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Quarterly Financial Information Disclosure [Abstract]
Real estate rental revenue	$ 76,952		$ 79,770		$ 79,405		$ 77,137		$ 79,102		$ 78,243		$ 74,226		$ 74,856		$ 313,264	$ 306,427	$ 288,637
Net income	5,426		79,662		31,821		2,379		62,095		580		(2,886)		29,398		119,288	89,187	111,601
Net income attributable to the controlling interests	$ 5,445		$ 79,674		$ 31,836		$ 2,384		$ 62,133		$ 647		$ (2,546)		$ 29,506		$ 119,339	$ 89,740	$ 111,639
Net income per share, Basic (in dollars per share)	$ 0.07	[1]	$ 1.07	[1],[2]	$ 0.44	[1],[2]	$ 0.03	[1]	$ 0.91	[1],[2]	$ 0.01	[1]	$ (0.04)	[1],[2],[3]	$ 0.43	[1],[2]	$ 1.65	$ 1.31	$ 1.67
Net income per share, diluted (in dollars per share)	$ 0.07	[1]	$ 1.07	[1],[2]	$ 0.44	[1],[2]	$ 0.03	[1]	$ 0.91	[1],[2]	$ 0.01	[1]	$ (0.04)	[1],[2],[3]	$ 0.43	[1],[2]	$ 1.65	$ 1.31	$ 1.67
Gain on sale of real estate, continuing operations			$ 77,600		$ 24,100				$ 59,400				$ 1,500		$ 30,300		$ 101,704	$ 91,107	$ 570
Casualty (gain) and real estate impairment loss, net													$ (5,900)				$ (676)	$ 5,909	$ 0

[1] With regard to per share calculations, the sum of the quarterly results may not equal full year results due to rounding.

[2] The second and third quarters of 2016 include gains on sale of real estate classified as continued operations of $24.1 million and $77.6 million, respectively. The first, second and fourth quarters of 2015 include gains on sale of real estate classified as continuing operations of $30.3 million, $1.5 million and $59.4 million, respectively.

[3] The second quarter of 2015 includes a real estate impairment of $5.9 million.

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Shareholders' Equity (Details) - USD ($)	3 Months Ended	12 Months Ended
	Jun. 30, 2016	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Jun. 30, 2015
Financing Agreements [Line Items]
Net proceeds from equity offerings		$ 172,936,000	$ 5,215,000	$ 30,690,000
Common stock reserved for future issuance					$ 200,000,000
Shares issued under Dividend Reinvestment Program		$ 700,000
Common Stock [Member]
Financing Agreements [Line Items]
Stock issued during period (in shares)	5,300,000	6,223,000	184,000	1,125,000
Pursuant of underwriter over-allotment (in shares)	693,750
Shares issued (in dollars per share)	$ 28.20
Net proceeds from equity offerings	$ 143,400,000		$ 5,200,000	$ 30,700,000
Common stock, weighted average issued price (in dollars per share)			$ 28.34	$ 27.86
Shares issued under Dividend Reinvestment Program (in shares)		23,000
Stock issued during period, weighted share price, dividend reinstated plan (in dollars per share)		$ 30.98
Shares issued under Dividend Reinvestment Program		$ 700,000
2016 Equity Distribution Agreements [Member] | Common Stock [Member]
Financing Agreements [Line Items]
Stock issued during period (in shares)		900,000
Net proceeds from equity offerings		$ 29,600,000
Stock issued during period, weighted average price (in dollars per share)		$ 33.32

XML

Deferred Costs Schedule of Prepaid Expenses and Other Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Deferred Costs, Leasing, Gross	$ 58,391	$ 59,382
Deferred Costs, Leasing, Accumulated Amortization	22,748	22,897
Deferred Costs, Leasing, Net	35,643	36,485
Deferred Leasing Incentives, Gross	21,157	18,701
Accumulated Amortization, Deferred Leasing Incentives	8,061	6,066
Deferred Leasing Incentives, Net	$ 13,096	$ 12,635

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Deferred Costs Schedule of Amortization and Write-Offs of Deferred Financing, Leasing, and Leasing Incentive Costs (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Deferred leasing costs amortization	$ 6,076	$ 5,983	$ 4,699
Deferred leasing incentives amortization	$ 2,994	$ 2,848	$ 1,704

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Schedule II (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Allowance for doubtful accounts
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	$ 2,297	$ 3,392	$ 6,783
Additions Charged to Expenses	1,706	1,368	1,402
Net Deductions (Recoveries)	(1,626)	(2,463)	(4,793)
Balance at End of Year	2,377	2,297	3,392
Valuation allowance for deferred tax assets
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	5,705	5,714	5,741
Additions Charged to Expenses	0	0	0
Net Deductions (Recoveries)	$ (2,823)	(9)	(27)
Balance at End of Year		$ 5,705	$ 5,714

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Schedule III (Details) ft² in Thousands		12 Months Ended
		Dec. 31, 2016 USD ($)		Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2016 USD ($) ft² unit		May 20, 2016 unit	Dec. 31, 2015 USD ($) apartment	Feb. 21, 2014 unit
Real Estate and Accumulated Depreciation [Line Items]
Initial Cost, Land	[1]					$ 602,173,000
Initial Cost, Buildings and Improvements	[1]					1,509,716,000
Net Improvements (Retirement) since Acquisition						613,746,000
Gross Amounts at Which Carried at December 31, 2016, Land						573,315,000
Gross Amounts at Which Carried at December 31, 2016, Buildings and Improvements						2,152,320,000
Gross Amounts at Which Carried at December 31, 2016, Total		$ 2,673,891,000		$ 2,547,188,000	$ 2,289,509,000	2,725,635,000	[2]		$ 2,673,891,000
Accumulated Depreciation at December 31, 2016		692,608,000		640,434,000	611,408,000	$ 657,425,000			$ 692,608,000
Net Rentable Square Feet | ft²	[3]					10,379
Units						4,480			506
Loans Payable						$ 144,485,000			$ 414,546,000
Real estate, federal income tax basis						2,151,400,000
Properties under development or held for future development						40,232,000			36,094,000
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance, beginning of period		2,673,891,000		2,547,188,000	2,289,509,000
Property acquisitions	[4]	240,499,000		162,702,000	289,140,000
Improvements	[4]	66,840,000		50,954,000	98,250,000
Impairment write-down		0		(5,909,000)	0
Write-off of disposed assets		(1,272,000)		(3,291,000)	(2,857,000)
Property sales		(254,323,000)		(77,753,000)	(126,854,000)
Balance, end of period		2,725,635,000	[2]	2,673,891,000	2,547,188,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance, beginning of period		692,608,000		640,434,000	611,408,000
Depreciation		88,347,000		86,536,000	77,741,000
Write-off of disposed assets		(486,000)		(2,408,000)	(2,549,000)
Property sales		(123,044,000)		(31,954,000)	(46,166,000)
Balance, end of period		$ 657,425,000		$ 692,608,000	$ 640,434,000
Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful Life		3 years
Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful Life		50 years
Multifamily Properties [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial Cost, Land	[1]					179,981,000
Initial Cost, Buildings and Improvements	[1]					481,862,000
Net Improvements (Retirement) since Acquisition						259,254,000
Gross Amounts at Which Carried at December 31, 2016, Land						151,420,000
Gross Amounts at Which Carried at December 31, 2016, Buildings and Improvements						769,677,000
Gross Amounts at Which Carried at December 31, 2016, Total	[2]	$ 921,097,000				921,097,000
Accumulated Depreciation at December 31, 2016		167,157,000				$ 167,157,000
Net Rentable Square Feet | ft²	[3]					4,345
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance, end of period	[2]	921,097,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance, end of period		$ 167,157,000
3801 Connecticut [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location		Washington, DC
Initial Cost, Land	[1]					$ 420,000
Initial Cost, Buildings and Improvements	[1]					2,678,000
Net Improvements (Retirement) since Acquisition						14,548,000
Gross Amounts at Which Carried at December 31, 2016, Land						420,000
Gross Amounts at Which Carried at December 31, 2016, Buildings and Improvements						17,226,000
Gross Amounts at Which Carried at December 31, 2016, Total	[2]	$ 17,646,000				17,646,000
Accumulated Depreciation at December 31, 2016		$ 10,671,000				$ 10,671,000
Year of Construction		Jan. 01, 1951
Date of Acquisition		Jan. 01, 1963
Net Rentable Square Feet | ft²	[3]					178
Units | unit						307
Depreciation Life	[5]	30 years
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance, end of period	[2]	$ 17,646,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance, end of period		$ 10,671,000
Roosevelt Towers [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location		Virginia
Initial Cost, Land	[1]					$ 336,000
Initial Cost, Buildings and Improvements	[1]					1,996,000
Net Improvements (Retirement) since Acquisition						12,261,000
Gross Amounts at Which Carried at December 31, 2016, Land						336,000
Gross Amounts at Which Carried at December 31, 2016, Buildings and Improvements						14,257,000
Gross Amounts at Which Carried at December 31, 2016, Total	[2]	$ 14,593,000				14,593,000
Accumulated Depreciation at December 31, 2016		$ 9,491,000				$ 9,491,000
Year of Construction		Jan. 01, 1964
Date of Acquisition		May 01, 1965
Net Rentable Square Feet | ft²	[3]					170
Units | unit						191
Depreciation Life	[5]	40 years
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance, end of period	[2]	$ 14,593,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance, end of period		$ 9,491,000
Park Adams [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location		Virginia
Initial Cost, Land	[1]					$ 287,000
Initial Cost, Buildings and Improvements	[1]					1,654,000
Net Improvements (Retirement) since Acquisition						11,904,000
Gross Amounts at Which Carried at December 31, 2016, Land						287,000
Gross Amounts at Which Carried at December 31, 2016, Buildings and Improvements						13,558,000
Gross Amounts at Which Carried at December 31, 2016, Total	[2]	$ 13,845,000				13,845,000
Accumulated Depreciation at December 31, 2016		$ 9,444,000				$ 9,444,000
Year of Construction		Jan. 01, 1959
Date of Acquisition		Jan. 01, 1969
Net Rentable Square Feet | ft²	[3]					173
Units | unit						200
Depreciation Life	[5]	35 years
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance, end of period	[2]	$ 13,845,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance, end of period		$ 9,444,000
The Ashby at McLean [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location		Virginia
Initial Cost, Land	[1]					$ 4,356,000
Initial Cost, Buildings and Improvements	[1]					17,102,000
Net Improvements (Retirement) since Acquisition						22,576,000
Gross Amounts at Which Carried at December 31, 2016, Land						4,356,000
Gross Amounts at Which Carried at December 31, 2016, Buildings and Improvements						39,678,000
Gross Amounts at Which Carried at December 31, 2016, Total	[2]	$ 44,034,000				44,034,000
Accumulated Depreciation at December 31, 2016		$ 23,631,000				$ 23,631,000
Year of Construction		Jan. 01, 1982
Date of Acquisition		Aug. 01, 1996
Net Rentable Square Feet | ft²	[3]					274
Units | unit						256
Depreciation Life	[5]	30 years
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance, end of period	[2]	$ 44,034,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance, end of period		$ 23,631,000
Walker House Apartments [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location		Maryland
Initial Cost, Land	[1]					$ 2,851,000
Initial Cost, Buildings and Improvements	[1]					7,946,000
Net Improvements (Retirement) since Acquisition						7,157,000
Gross Amounts at Which Carried at December 31, 2016, Land						2,851,000
Gross Amounts at Which Carried at December 31, 2016, Buildings and Improvements						15,103,000
Gross Amounts at Which Carried at December 31, 2016, Total	[2]	$ 17,954,000				17,954,000
Accumulated Depreciation at December 31, 2016		$ 10,751,000				$ 10,751,000
Year of Construction		Jan. 01, 1971
Date of Acquisition		Mar. 01, 1996
Net Rentable Square Feet | ft²	[3]					157
Units | unit						212
Depreciation Life	[5]	30 years
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance, end of period	[2]	$ 17,954,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance, end of period		$ 10,751,000
Bethesda Hill Apartments [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location		Maryland
Initial Cost, Land	[1]					$ 3,900,000
Initial Cost, Buildings and Improvements	[1]					13,412,000
Net Improvements (Retirement) since Acquisition						13,280,000
Gross Amounts at Which Carried at December 31, 2016, Land						3,900,000
Gross Amounts at Which Carried at December 31, 2016, Buildings and Improvements						26,692,000
Gross Amounts at Which Carried at December 31, 2016, Total	[2]	$ 30,592,000				30,592,000
Accumulated Depreciation at December 31, 2016		$ 17,788,000				$ 17,788,000
Year of Construction		Jan. 01, 1986
Date of Acquisition		Nov. 01, 1997
Net Rentable Square Feet | ft²	[3]					225
Units | unit						195
Depreciation Life	[5]	30 years
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance, end of period	[2]	$ 30,592,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance, end of period		$ 17,788,000
Bennett Park [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location		Virginia
Initial Cost, Land	[1]					$ 2,861,000
Initial Cost, Buildings and Improvements	[1]					917,000
Net Improvements (Retirement) since Acquisition						80,226,000
Gross Amounts at Which Carried at December 31, 2016, Land						4,774,000
Gross Amounts at Which Carried at December 31, 2016, Buildings and Improvements						79,230,000
Gross Amounts at Which Carried at December 31, 2016, Total	[2]	$ 84,004,000				84,004,000
Accumulated Depreciation at December 31, 2016		$ 31,960,000				$ 31,960,000
Year of Construction		Jan. 01, 2007
Date of Acquisition		Feb. 01, 2001
Net Rentable Square Feet | ft²	[3]					214
Units | unit						224
Depreciation Life	[5]	28 years
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance, end of period	[2]	$ 84,004,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance, end of period		$ 31,960,000
The Clayborne [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location		Virginia
Initial Cost, Land	[1]					$ 269,000
Initial Cost, Buildings and Improvements	[1]					0
Net Improvements (Retirement) since Acquisition						30,858,000
Gross Amounts at Which Carried at December 31, 2016, Land						699,000
Gross Amounts at Which Carried at December 31, 2016, Buildings and Improvements						30,428,000
Gross Amounts at Which Carried at December 31, 2016, Total	[2]	$ 31,127,000				31,127,000
Accumulated Depreciation at December 31, 2016		$ 13,831,000				$ 13,831,000
Year of Construction		Jan. 01, 2008
Date of Acquisition		Jun. 01, 2003
Net Rentable Square Feet | ft²	[3]					60
Units | unit						74
Depreciation Life	[5]	26 years
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance, end of period	[2]	$ 31,127,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance, end of period		$ 13,831,000
The Kenmore [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location		Washington, DC
Initial Cost, Land	[1],[6]					$ 28,222,000
Initial Cost, Buildings and Improvements	[1],[6]					33,955,000
Net Improvements (Retirement) since Acquisition	[6]					11,422,000
Gross Amounts at Which Carried at December 31, 2016, Land	[6]					28,222,000
Gross Amounts at Which Carried at December 31, 2016, Buildings and Improvements	[6]					45,377,000
Gross Amounts at Which Carried at December 31, 2016, Total	[2],[6]	$ 73,599,000				73,599,000
Accumulated Depreciation at December 31, 2016	[6]	$ 12,152,000				$ 12,152,000
Year of Construction		Jan. 01, 1948
Date of Acquisition	[6]	Sep. 01, 2008
Net Rentable Square Feet | ft²	[3]					268
Units | unit						374
Depreciation Life	[5]	30 years
Loans Payable						$ 32,900,000
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance, end of period	[2],[6]	$ 73,599,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance, end of period	[6]	$ 12,152,000
The Maxwell [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location		Virginia
Initial Cost, Land	[1]					12,787,000
Initial Cost, Buildings and Improvements	[1]					0
Net Improvements (Retirement) since Acquisition	[7]					38,013,000
Gross Amounts at Which Carried at December 31, 2016, Land	[7]					12,851,000
Gross Amounts at Which Carried at December 31, 2016, Buildings and Improvements	[7]					37,949,000
Gross Amounts at Which Carried at December 31, 2016, Total	[2],[7]	$ 50,800,000				50,800,000
Accumulated Depreciation at December 31, 2016	[7]	$ 4,571,000				$ 4,571,000
Year of Construction		Jan. 01, 2014
Date of Acquisition	[7]	Jun. 01, 2011
Net Rentable Square Feet | ft²	[3]					139
Units | unit						163
Depreciation Life	[5]	30 years
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance, end of period	[2],[7]	$ 50,800,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance, end of period	[7]	$ 4,571,000
The Paramount [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location		Virginia
Initial Cost, Land	[1]					$ 8,568,000
Initial Cost, Buildings and Improvements	[1]					38,716,000
Net Improvements (Retirement) since Acquisition						2,073,000
Gross Amounts at Which Carried at December 31, 2016, Land						8,568,000
Gross Amounts at Which Carried at December 31, 2016, Buildings and Improvements						40,789,000
Gross Amounts at Which Carried at December 31, 2016, Total	[2]	$ 49,357,000				49,357,000
Accumulated Depreciation at December 31, 2016		$ 5,774,000				$ 5,774,000
Year of Construction		Jan. 01, 1984
Date of Acquisition		Oct. 01, 2013
Net Rentable Square Feet | ft²	[3]					141
Units | unit						135
Depreciation Life	[5]	30 years
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance, end of period	[2]	$ 49,357,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance, end of period		$ 5,774,000
Yale West [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location		Washington, DC
Initial Cost, Land	[1],[6]					$ 14,684,000
Initial Cost, Buildings and Improvements	[1],[6]					62,069,000
Net Improvements (Retirement) since Acquisition	[6]					549,000
Gross Amounts at Which Carried at December 31, 2016, Land	[6]					14,684,000
Gross Amounts at Which Carried at December 31, 2016, Buildings and Improvements	[6]					62,618,000
Gross Amounts at Which Carried at December 31, 2016, Total	[2],[6]	$ 77,302,000				77,302,000
Accumulated Depreciation at December 31, 2016	[6]	$ 6,480,000				$ 6,480,000
Year of Construction		Jan. 01, 2011
Date of Acquisition	[6]	Feb. 01, 2014
Net Rentable Square Feet | ft²	[3]					238
Units | unit						216				216
Depreciation Life	[5]	30 years
Loans Payable	[8]					$ 47,078,000			47,502,000
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance, end of period	[2],[6]	$ 77,302,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance, end of period	[6]	$ 6,480,000
The Wellington [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location		Virginia
Initial Cost, Land	[1]					30,548,000
Initial Cost, Buildings and Improvements	[1]					116,563,000
Net Improvements (Retirement) since Acquisition						4,137,000
Gross Amounts at Which Carried at December 31, 2016, Land						30,548,000
Gross Amounts at Which Carried at December 31, 2016, Buildings and Improvements						120,700,000
Gross Amounts at Which Carried at December 31, 2016, Total	[2]	$ 151,248,000				151,248,000
Accumulated Depreciation at December 31, 2016		$ 6,325,000				$ 6,325,000
Year of Construction		Jan. 01, 1960
Date of Acquisition		Jul. 01, 2015
Net Rentable Square Feet | ft²	[3]					842
Units | unit						711
Depreciation Life	[5]	30 years
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance, end of period	[2]	$ 151,248,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance, end of period		$ 6,325,000
The Wellington land parcel [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location		Virginia
Initial Cost, Land	[1],[9]					$ 15,000,000
Initial Cost, Buildings and Improvements	[1],[9]					0
Net Improvements (Retirement) since Acquisition	[9]					3,952,000
Gross Amounts at Which Carried at December 31, 2016, Land						0
Gross Amounts at Which Carried at December 31, 2016, Buildings and Improvements	[9]					18,952,000
Gross Amounts at Which Carried at December 31, 2016, Total	[2],[9]	$ 18,952,000				18,952,000
Accumulated Depreciation at December 31, 2016		$ 0				0
Date of Acquisition		Jul. 01, 2015
Properties under development or held for future development						19,000,000			19,000,000
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance, end of period	[2],[9]	$ 18,952,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance, end of period		$ 0
Riverside Apartments [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location		Virginia
Initial Cost, Land	[1]					38,924,000
Initial Cost, Buildings and Improvements	[1]					184,854,000
Net Improvements (Retirement) since Acquisition						5,857,000
Gross Amounts at Which Carried at December 31, 2016, Land						38,924,000
Gross Amounts at Which Carried at December 31, 2016, Buildings and Improvements						190,711,000
Gross Amounts at Which Carried at December 31, 2016, Total	[2]	$ 229,635,000				229,635,000
Accumulated Depreciation at December 31, 2016		$ 4,288,000				$ 4,288,000
Year of Construction		Jan. 01, 1971
Date of Acquisition		May 20, 2016
Net Rentable Square Feet | ft²	[3]					1,266
Units | unit						1,222		1,222
Depreciation Life	[5]	30 years
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance, end of period	[2]	$ 229,635,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance, end of period		$ 4,288,000
Riverside Apartments land parcel [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location		Virginia
Initial Cost, Land	[1],[9]					$ 15,968,000
Initial Cost, Buildings and Improvements	[1]					0
Net Improvements (Retirement) since Acquisition	[9]					441,000
Gross Amounts at Which Carried at December 31, 2016, Land						0
Gross Amounts at Which Carried at December 31, 2016, Buildings and Improvements	[9]					16,409,000
Gross Amounts at Which Carried at December 31, 2016, Total	[2],[9]	$ 16,409,000				16,409,000
Accumulated Depreciation at December 31, 2016		$ 0				0
Date of Acquisition		May 20, 2016
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance, end of period	[2],[9]	$ 16,409,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance, end of period		0
Office Buildings [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial Cost, Land	[1]					301,223,000
Initial Cost, Buildings and Improvements	[1]					778,356,000
Net Improvements (Retirement) since Acquisition						272,439,000
Gross Amounts at Which Carried at December 31, 2016, Land						301,224,000
Gross Amounts at Which Carried at December 31, 2016, Buildings and Improvements						1,050,794,000
Gross Amounts at Which Carried at December 31, 2016, Total	[2]	1,352,018,000				1,352,018,000
Accumulated Depreciation at December 31, 2016		363,646,000				$ 363,646,000
Net Rentable Square Feet | ft²	[3]					3,704
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance, end of period	[2]	1,352,018,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance, end of period		$ 363,646,000
515 King Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location		Virginia
Initial Cost, Land	[1]					$ 4,102,000
Initial Cost, Buildings and Improvements	[1]					3,931,000
Net Improvements (Retirement) since Acquisition						7,795,000
Gross Amounts at Which Carried at December 31, 2016, Land						4,102,000
Gross Amounts at Which Carried at December 31, 2016, Buildings and Improvements						11,726,000
Gross Amounts at Which Carried at December 31, 2016, Total	[2]	$ 15,828,000				15,828,000
Accumulated Depreciation at December 31, 2016		$ 5,775,000				$ 5,775,000
Year of Construction		Jan. 01, 1966
Date of Acquisition		Jul. 01, 1992
Net Rentable Square Feet | ft²						75
Depreciation Life	[5]	50 years
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance, end of period	[2]	$ 15,828,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance, end of period		$ 5,775,000
1220 19th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location		Washington, DC
Initial Cost, Land	[1]					$ 7,803,000
Initial Cost, Buildings and Improvements	[1]					11,366,000
Net Improvements (Retirement) since Acquisition						15,973,000
Gross Amounts at Which Carried at December 31, 2016, Land						7,802,000
Gross Amounts at Which Carried at December 31, 2016, Buildings and Improvements						27,340,000
Gross Amounts at Which Carried at December 31, 2016, Total	[2]	$ 35,142,000				35,142,000
Accumulated Depreciation at December 31, 2016		$ 15,403,000				$ 15,403,000
Year of Construction		Jan. 01, 1976
Date of Acquisition		Nov. 01, 1995
Net Rentable Square Feet | ft²						103
Depreciation Life	[5]	30 years
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance, end of period	[2]	$ 35,142,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance, end of period		$ 15,403,000
1600 Wilson Boulevard [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location		Virginia
Initial Cost, Land	[1]					$ 6,661,000
Initial Cost, Buildings and Improvements	[1]					16,742,000
Net Improvements (Retirement) since Acquisition						27,930,000
Gross Amounts at Which Carried at December 31, 2016, Land						6,661,000
Gross Amounts at Which Carried at December 31, 2016, Buildings and Improvements						44,672,000
Gross Amounts at Which Carried at December 31, 2016, Total	[2]	$ 51,333,000				51,333,000
Accumulated Depreciation at December 31, 2016		$ 22,661,000				$ 22,661,000
Year of Construction		Jan. 01, 1973
Date of Acquisition		Oct. 01, 1997
Net Rentable Square Feet | ft²						169
Depreciation Life	[5]	30 years
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance, end of period	[2]	$ 51,333,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance, end of period		$ 22,661,000
Silverline Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location		Virginia
Initial Cost, Land	[1]					$ 12,049,000
Initial Cost, Buildings and Improvements	[1]					71,825,000
Net Improvements (Retirement) since Acquisition						98,303,000
Gross Amounts at Which Carried at December 31, 2016, Land						12,049,000
Gross Amounts at Which Carried at December 31, 2016, Buildings and Improvements						170,128,000
Gross Amounts at Which Carried at December 31, 2016, Total	[2]	$ 182,177,000				182,177,000
Accumulated Depreciation at December 31, 2016		$ 77,829,000				$ 77,829,000
Year of Construction		Jan. 01, 1972
Date of Acquisition		Nov. 01, 1997
Net Rentable Square Feet | ft²						546
Depreciation Life	[5]	30 years
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance, end of period	[2]	$ 182,177,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance, end of period		$ 77,829,000
Courthouse Square [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location		Virginia
Initial Cost, Land	[1]					$ 0
Initial Cost, Buildings and Improvements	[1]					17,096,000
Net Improvements (Retirement) since Acquisition						9,369,000
Gross Amounts at Which Carried at December 31, 2016, Land						0
Gross Amounts at Which Carried at December 31, 2016, Buildings and Improvements						26,465,000
Gross Amounts at Which Carried at December 31, 2016, Total	[2]	$ 26,465,000				26,465,000
Accumulated Depreciation at December 31, 2016		$ 14,252,000				$ 14,252,000
Year of Construction		Jan. 01, 1979
Date of Acquisition		Oct. 01, 2000
Net Rentable Square Feet | ft²						118
Depreciation Life	[5]	30 years
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance, end of period	[2]	$ 26,465,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance, end of period		$ 14,252,000
1776 G Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location		Washington, DC
Initial Cost, Land	[1]					$ 31,500,000
Initial Cost, Buildings and Improvements	[1]					54,327,000
Net Improvements (Retirement) since Acquisition						7,448,000
Gross Amounts at Which Carried at December 31, 2016, Land						31,500,000
Gross Amounts at Which Carried at December 31, 2016, Buildings and Improvements						61,775,000
Gross Amounts at Which Carried at December 31, 2016, Total	[2]	$ 93,275,000				93,275,000
Accumulated Depreciation at December 31, 2016		$ 29,983,000				$ 29,983,000
Year of Construction		Jan. 01, 1979
Date of Acquisition		Aug. 01, 2003
Net Rentable Square Feet | ft²						265
Depreciation Life	[5]	30 years
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance, end of period	[2]	$ 93,275,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance, end of period		$ 29,983,000
Monument II [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location		Virginia
Initial Cost, Land	[1]					$ 10,244,000
Initial Cost, Buildings and Improvements	[1]					65,205,000
Net Improvements (Retirement) since Acquisition						9,115,000
Gross Amounts at Which Carried at December 31, 2016, Land						10,244,000
Gross Amounts at Which Carried at December 31, 2016, Buildings and Improvements						74,320,000
Gross Amounts at Which Carried at December 31, 2016, Total	[2]	$ 84,564,000				84,564,000
Accumulated Depreciation at December 31, 2016		$ 25,520,000				$ 25,520,000
Year of Construction		Jan. 01, 2000
Date of Acquisition		Mar. 01, 2007
Net Rentable Square Feet | ft²						208
Depreciation Life	[5]	30 years
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance, end of period	[2]	$ 84,564,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance, end of period		$ 25,520,000
2000 M Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location		Washington, DC
Initial Cost, Land	[1]					$ 0
Initial Cost, Buildings and Improvements	[1]					61,101,000
Net Improvements (Retirement) since Acquisition						21,696,000
Gross Amounts at Which Carried at December 31, 2016, Land						0
Gross Amounts at Which Carried at December 31, 2016, Buildings and Improvements						82,797,000
Gross Amounts at Which Carried at December 31, 2016, Total	[2]	$ 82,797,000				82,797,000
Accumulated Depreciation at December 31, 2016		$ 27,776,000				$ 27,776,000
Year of Construction		Jan. 01, 1971
Date of Acquisition		Dec. 01, 2007
Net Rentable Square Feet | ft²						231
Depreciation Life	[5]	30 years
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance, end of period	[2]	$ 82,797,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance, end of period		$ 27,776,000
M Street 2445 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location		Washington, DC
Initial Cost, Land	[1]					$ 46,887,000
Initial Cost, Buildings and Improvements	[1]					106,743,000
Net Improvements (Retirement) since Acquisition						6,210,000
Gross Amounts at Which Carried at December 31, 2016, Land						46,887,000
Gross Amounts at Which Carried at December 31, 2016, Buildings and Improvements						112,953,000
Gross Amounts at Which Carried at December 31, 2016, Total	[2]	$ 159,840,000				159,840,000
Accumulated Depreciation at December 31, 2016		$ 36,583,000				$ 36,583,000
Year of Construction		Jan. 01, 1986
Date of Acquisition		Dec. 01, 2008
Net Rentable Square Feet | ft²						290
Depreciation Life	[5]	30 years
Loans Payable	[10]					$ 0			101,866,000
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance, end of period	[2]	$ 159,840,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance, end of period		$ 36,583,000
925 Corporate Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location		Virginia
Initial Cost, Land	[1]					4,518,000
Initial Cost, Buildings and Improvements	[1]					24,801,000
Net Improvements (Retirement) since Acquisition						1,080,000
Gross Amounts at Which Carried at December 31, 2016, Land						4,518,000
Gross Amounts at Which Carried at December 31, 2016, Buildings and Improvements						25,881,000
Gross Amounts at Which Carried at December 31, 2016, Total	[2]	$ 30,399,000				30,399,000
Accumulated Depreciation at December 31, 2016		$ 8,538,000				$ 8,538,000
Year of Construction		Jan. 01, 2007
Date of Acquisition		Jun. 01, 2010
Net Rentable Square Feet | ft²						134
Depreciation Life	[5]	30 years
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance, end of period	[2]	$ 30,399,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance, end of period		$ 8,538,000
1000 Corporate Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location		Virginia
Initial Cost, Land	[1]					$ 4,897,000
Initial Cost, Buildings and Improvements	[1]					25,376,000
Net Improvements (Retirement) since Acquisition						(249,000)
Gross Amounts at Which Carried at December 31, 2016, Land						4,898,000
Gross Amounts at Which Carried at December 31, 2016, Buildings and Improvements						25,126,000
Gross Amounts at Which Carried at December 31, 2016, Total	[2]	$ 30,024,000				30,024,000
Accumulated Depreciation at December 31, 2016		$ 7,867,000				$ 7,867,000
Year of Construction		Jan. 01, 2009
Date of Acquisition		Jun. 01, 2010
Net Rentable Square Feet | ft²						136
Depreciation Life	[5]	30 years
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance, end of period	[2]	$ 30,024,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance, end of period		$ 7,867,000
1140 Connecticut Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location		Washington, DC
Initial Cost, Land	[1]					$ 25,226,000
Initial Cost, Buildings and Improvements	[1]					50,495,000
Net Improvements (Retirement) since Acquisition						13,123,000
Gross Amounts at Which Carried at December 31, 2016, Land						25,226,000
Gross Amounts at Which Carried at December 31, 2016, Buildings and Improvements						63,618,000
Gross Amounts at Which Carried at December 31, 2016, Total	[2]	$ 88,844,000				88,844,000
Accumulated Depreciation at December 31, 2016		$ 16,015,000				$ 16,015,000
Year of Construction		Jan. 01, 1966
Date of Acquisition		Jan. 01, 2011
Net Rentable Square Feet | ft²						183
Depreciation Life	[5]	30 years
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance, end of period	[2]	$ 88,844,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance, end of period		$ 16,015,000
1227 25th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location		Washington, DC
Initial Cost, Land	[1]					$ 17,505,000
Initial Cost, Buildings and Improvements	[1]					21,319,000
Net Improvements (Retirement) since Acquisition						4,507,000
Gross Amounts at Which Carried at December 31, 2016, Land						17,505,000
Gross Amounts at Which Carried at December 31, 2016, Buildings and Improvements						25,826,000
Gross Amounts at Which Carried at December 31, 2016, Total	[2]	$ 43,331,000				43,331,000
Accumulated Depreciation at December 31, 2016		$ 6,998,000				$ 6,998,000
Year of Construction		Jan. 01, 1988
Date of Acquisition		Mar. 01, 2011
Net Rentable Square Feet | ft²						136
Depreciation Life	[5]	30 years
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance, end of period	[2]	$ 43,331,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance, end of period		$ 6,998,000
Braddock Place Member
Real Estate and Accumulated Depreciation [Line Items]
Location		Virginia
Initial Cost, Land	[1]					$ 18,817,000
Initial Cost, Buildings and Improvements	[1]					71,250,000
Net Improvements (Retirement) since Acquisition						10,978,000
Gross Amounts at Which Carried at December 31, 2016, Land						18,818,000
Gross Amounts at Which Carried at December 31, 2016, Buildings and Improvements						82,227,000
Gross Amounts at Which Carried at December 31, 2016, Total	[2]	$ 101,045,000				101,045,000
Accumulated Depreciation at December 31, 2016		$ 20,104,000				$ 20,104,000
Year of Construction		Jan. 01, 1985
Date of Acquisition		Sep. 01, 2011
Net Rentable Square Feet | ft²						348
Depreciation Life	[5]	30 years
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance, end of period	[2]	$ 101,045,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance, end of period		$ 20,104,000
John Marshall II Member
Real Estate and Accumulated Depreciation [Line Items]
Location		Virginia
Initial Cost, Land	[1]					$ 13,490,000
Initial Cost, Buildings and Improvements	[1]					53,024,000
Net Improvements (Retirement) since Acquisition						2,841,000
Gross Amounts at Which Carried at December 31, 2016, Land						13,490,000
Gross Amounts at Which Carried at December 31, 2016, Buildings and Improvements						55,865,000
Gross Amounts at Which Carried at December 31, 2016, Total	[2]	$ 69,355,000				69,355,000
Accumulated Depreciation at December 31, 2016		$ 11,536,000				$ 11,536,000
Year of Construction		Jan. 01, 1996
Date of Acquisition		Sep. 01, 2011
Net Rentable Square Feet | ft²						223
Depreciation Life	[5]	30 years
Loans Payable	[11]					$ 0			51,011,000
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance, end of period	[2]	$ 69,355,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance, end of period		$ 11,536,000
Fairgate at Ballston [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location		Virginia
Initial Cost, Land	[1]					17,750,000
Initial Cost, Buildings and Improvements	[1]					29,885,000
Net Improvements (Retirement) since Acquisition						5,327,000
Gross Amounts at Which Carried at December 31, 2016, Land						17,750,000
Gross Amounts at Which Carried at December 31, 2016, Buildings and Improvements						35,212,000
Gross Amounts at Which Carried at December 31, 2016, Total	[2]	$ 52,962,000				52,962,000
Accumulated Depreciation at December 31, 2016		$ 7,288,000				$ 7,288,000
Year of Construction		Jan. 01, 1988
Date of Acquisition		Jun. 01, 2012
Net Rentable Square Feet | ft²						143
Depreciation Life	[5]	30 years
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance, end of period	[2]	$ 52,962,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance, end of period		$ 7,288,000
The Army Navy Club Building [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location		Washington, DC
Initial Cost, Land	[1],[6]					$ 30,796,000
Initial Cost, Buildings and Improvements	[1],[6],[7]					39,315,000
Net Improvements (Retirement) since Acquisition	[6],[7]					4,885,000
Gross Amounts at Which Carried at December 31, 2016, Land	[6]					30,796,000
Gross Amounts at Which Carried at December 31, 2016, Buildings and Improvements	[6],[7]					44,200,000
Gross Amounts at Which Carried at December 31, 2016, Total	[2],[6],[7]	$ 74,996,000				74,996,000
Accumulated Depreciation at December 31, 2016	[6]	$ 5,633,000				$ 5,633,000
Year of Construction		Jan. 01, 1912
Date of Acquisition		Mar. 01, 2014
Net Rentable Square Feet | ft²						108
Depreciation Life	[5]	30 years
Loans Payable	[12]					$ 49,618,000			50,750,000
Properties under development or held for future development						2,200,000
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance, end of period	[2],[6],[7]	$ 74,996,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance, end of period	[6]	$ 5,633,000
1775 Eye Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location		Washington, DC
Initial Cost, Land	[1]					48,086,000
Initial Cost, Buildings and Improvements	[1]					51,074,000
Net Improvements (Retirement) since Acquisition						7,833,000
Gross Amounts at Which Carried at December 31, 2016, Land						48,086,000
Gross Amounts at Which Carried at December 31, 2016, Buildings and Improvements						58,907,000
Gross Amounts at Which Carried at December 31, 2016, Total	[2]	$ 106,993,000				106,993,000
Accumulated Depreciation at December 31, 2016		$ 7,593,000				$ 7,593,000
Year of Construction		Jan. 01, 1964
Date of Acquisition		May 01, 2014
Net Rentable Square Feet | ft²						186
Depreciation Life	[5]	30 years
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance, end of period	[2]	$ 106,993,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance, end of period		$ 7,593,000
1901 Pennsylvania Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location		Washington, DC
Initial Cost, Land	[1]					$ 892,000
Initial Cost, Buildings and Improvements	[1]					3,481,000
Net Improvements (Retirement) since Acquisition						18,275,000
Gross Amounts at Which Carried at December 31, 2016, Land						892,000
Gross Amounts at Which Carried at December 31, 2016, Buildings and Improvements						21,756,000
Gross Amounts at Which Carried at December 31, 2016, Total	[2]	$ 22,648,000				22,648,000
Accumulated Depreciation at December 31, 2016		$ 16,292,000				$ 16,292,000
Year of Construction		Jan. 01, 1960
Date of Acquisition		May 01, 1977
Net Rentable Square Feet | ft²						102
Depreciation Life	[5]	28 years
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance, end of period	[2]	$ 22,648,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance, end of period		16,292,000
Retail Centers [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial Cost, Land	[1]					$ 120,969,000
Initial Cost, Buildings and Improvements	[1]					249,498,000
Net Improvements (Retirement) since Acquisition						82,053,000
Gross Amounts at Which Carried at December 31, 2016, Land						120,671,000
Gross Amounts at Which Carried at December 31, 2016, Buildings and Improvements						331,849,000
Gross Amounts at Which Carried at December 31, 2016, Total	[2]	452,520,000				452,520,000
Accumulated Depreciation at December 31, 2016		126,622,000				$ 126,622,000
Net Rentable Square Feet | ft²						2,330
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance, end of period	[2]	452,520,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance, end of period		$ 126,622,000
Takoma Park [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location		Maryland
Initial Cost, Land	[1]					$ 415,000
Initial Cost, Buildings and Improvements	[1]					1,084,000
Net Improvements (Retirement) since Acquisition						332,000
Gross Amounts at Which Carried at December 31, 2016, Land						415,000
Gross Amounts at Which Carried at December 31, 2016, Buildings and Improvements						1,416,000
Gross Amounts at Which Carried at December 31, 2016, Total	[2]	$ 1,831,000				1,831,000
Accumulated Depreciation at December 31, 2016		$ 1,194,000				$ 1,194,000
Year of Construction		Jan. 01, 1962
Date of Acquisition		Jul. 01, 1963
Net Rentable Square Feet | ft²						51
Depreciation Life	[5]	50 years
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance, end of period	[2]	$ 1,831,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance, end of period		$ 1,194,000
Westminster [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location		Maryland
Initial Cost, Land	[1]					$ 519,000
Initial Cost, Buildings and Improvements	[1]					1,775,000
Net Improvements (Retirement) since Acquisition						9,839,000
Gross Amounts at Which Carried at December 31, 2016, Land						519,000
Gross Amounts at Which Carried at December 31, 2016, Buildings and Improvements						11,614,000
Gross Amounts at Which Carried at December 31, 2016, Total	[2]	$ 12,133,000				12,133,000
Accumulated Depreciation at December 31, 2016		$ 7,614,000				$ 7,614,000
Year of Construction		Jan. 01, 1969
Date of Acquisition		Sep. 01, 1972
Net Rentable Square Feet | ft²						150
Depreciation Life	[5]	37 years
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance, end of period	[2]	$ 12,133,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance, end of period		$ 7,614,000
Concord Centre [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location		Virginia
Initial Cost, Land	[1]					$ 413,000
Initial Cost, Buildings and Improvements	[1]					850,000
Net Improvements (Retirement) since Acquisition						5,845,000
Gross Amounts at Which Carried at December 31, 2016, Land						413,000
Gross Amounts at Which Carried at December 31, 2016, Buildings and Improvements						6,695,000
Gross Amounts at Which Carried at December 31, 2016, Total	[2]	$ 7,108,000				7,108,000
Accumulated Depreciation at December 31, 2016		$ 3,414,000				$ 3,414,000
Year of Construction		Jan. 01, 1960
Date of Acquisition		Dec. 01, 1973
Net Rentable Square Feet | ft²						76
Depreciation Life	[5]	33 years
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance, end of period	[2]	$ 7,108,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance, end of period		$ 3,414,000
Wheaton Park [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location		Maryland
Initial Cost, Land	[1]					$ 796,000
Initial Cost, Buildings and Improvements	[1]					857,000
Net Improvements (Retirement) since Acquisition						4,740,000
Gross Amounts at Which Carried at December 31, 2016, Land						796,000
Gross Amounts at Which Carried at December 31, 2016, Buildings and Improvements						5,597,000
Gross Amounts at Which Carried at December 31, 2016, Total	[2]	$ 6,393,000				6,393,000
Accumulated Depreciation at December 31, 2016		$ 3,931,000				$ 3,931,000
Year of Construction		Jan. 01, 1967
Date of Acquisition		Sep. 01, 1977
Net Rentable Square Feet | ft²						74
Depreciation Life	[5]	50 years
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance, end of period	[2]	$ 6,393,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance, end of period		$ 3,931,000
Bradlee [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location		Virginia
Initial Cost, Land	[1]					$ 4,152,000
Initial Cost, Buildings and Improvements	[1]					5,383,000
Net Improvements (Retirement) since Acquisition						14,205,000
Gross Amounts at Which Carried at December 31, 2016, Land						4,152,000
Gross Amounts at Which Carried at December 31, 2016, Buildings and Improvements						19,588,000
Gross Amounts at Which Carried at December 31, 2016, Total	[2]	$ 23,740,000				23,740,000
Accumulated Depreciation at December 31, 2016		$ 11,579,000				$ 11,579,000
Year of Construction		Jan. 01, 1955
Date of Acquisition		Dec. 01, 1984
Net Rentable Square Feet | ft²						172
Depreciation Life	[5]	40 years
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance, end of period	[2]	$ 23,740,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance, end of period		$ 11,579,000
Chevy Chase Metro Plaza [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location		Washington, DC
Initial Cost, Land	[1]					$ 1,549,000
Initial Cost, Buildings and Improvements	[1]					4,304,000
Net Improvements (Retirement) since Acquisition						8,245,000
Gross Amounts at Which Carried at December 31, 2016, Land						1,549,000
Gross Amounts at Which Carried at December 31, 2016, Buildings and Improvements						12,549,000
Gross Amounts at Which Carried at December 31, 2016, Total	[2]	$ 14,098,000				14,098,000
Accumulated Depreciation at December 31, 2016		$ 6,908,000				$ 6,908,000
Year of Construction		Jan. 01, 1975
Date of Acquisition		Sep. 01, 1985
Net Rentable Square Feet | ft²						50
Depreciation Life	[5]	50 years
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance, end of period	[2]	$ 14,098,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance, end of period		$ 6,908,000
Shoppes of Foxchase [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location		Virginia
Initial Cost, Land	[1]					$ 5,838,000
Initial Cost, Buildings and Improvements	[1]					2,979,000
Net Improvements (Retirement) since Acquisition						14,868,000
Gross Amounts at Which Carried at December 31, 2016, Land						5,838,000
Gross Amounts at Which Carried at December 31, 2016, Buildings and Improvements						17,847,000
Gross Amounts at Which Carried at December 31, 2016, Total	[2]	$ 23,685,000				23,685,000
Accumulated Depreciation at December 31, 2016		$ 7,298,000				$ 7,298,000
Year of Construction		Jan. 01, 1960
Date of Acquisition		Jun. 01, 1994
Net Rentable Square Feet | ft²						134
Depreciation Life	[5]	50 years
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance, end of period	[2]	$ 23,685,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance, end of period		$ 7,298,000
Frederick County Square [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location		Maryland
Initial Cost, Land	[1]					$ 6,561,000
Initial Cost, Buildings and Improvements	[1]					6,830,000
Net Improvements (Retirement) since Acquisition						5,295,000
Gross Amounts at Which Carried at December 31, 2016, Land						6,561,000
Gross Amounts at Which Carried at December 31, 2016, Buildings and Improvements						12,125,000
Gross Amounts at Which Carried at December 31, 2016, Total	[2]	$ 18,686,000				18,686,000
Accumulated Depreciation at December 31, 2016		$ 7,828,000				$ 7,828,000
Year of Construction		Jan. 01, 1973
Date of Acquisition		Aug. 01, 1995
Net Rentable Square Feet | ft²						227
Depreciation Life	[5]	30 years
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance, end of period	[2]	$ 18,686,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance, end of period		$ 7,828,000
800 S. Washington Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location		Virginia
Initial Cost, Land	[1]					$ 2,904,000
Initial Cost, Buildings and Improvements	[1]					5,489,000
Net Improvements (Retirement) since Acquisition						5,954,000
Gross Amounts at Which Carried at December 31, 2016, Land						2,904,000
Gross Amounts at Which Carried at December 31, 2016, Buildings and Improvements						11,443,000
Gross Amounts at Which Carried at December 31, 2016, Total	[2]	$ 14,347,000				14,347,000
Accumulated Depreciation at December 31, 2016		$ 5,123,000				$ 5,123,000
Year of Construction		Jan. 01, 1951
Date of Acquisition		Jun. 01, 1998
Net Rentable Square Feet | ft²						46
Depreciation Life	[5]	30 years
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance, end of period	[2]	$ 14,347,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance, end of period		$ 5,123,000
Centre at Hagerstown . [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location		Maryland
Initial Cost, Land	[1]					$ 13,029,000
Initial Cost, Buildings and Improvements	[1]					25,415,000
Net Improvements (Retirement) since Acquisition						2,610,000
Gross Amounts at Which Carried at December 31, 2016, Land						13,029,000
Gross Amounts at Which Carried at December 31, 2016, Buildings and Improvements						28,025,000
Gross Amounts at Which Carried at December 31, 2016, Total	[2]	$ 41,054,000				41,054,000
Accumulated Depreciation at December 31, 2016		$ 13,856,000				$ 13,856,000
Year of Construction		Jan. 01, 2000
Date of Acquisition		Jun. 01, 2002
Net Rentable Square Feet | ft²						331
Depreciation Life	[5]	30 years
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance, end of period	[2]	$ 41,054,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance, end of period		$ 13,856,000
Frederick Crossing [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location		Maryland
Initial Cost, Land	[1]					$ 12,759,000
Initial Cost, Buildings and Improvements	[1]					35,477,000
Net Improvements (Retirement) since Acquisition						2,265,000
Gross Amounts at Which Carried at December 31, 2016, Land						12,759,000
Gross Amounts at Which Carried at December 31, 2016, Buildings and Improvements						37,742,000
Gross Amounts at Which Carried at December 31, 2016, Total	[2]	$ 50,501,000				50,501,000
Accumulated Depreciation at December 31, 2016		$ 15,769,000				$ 15,769,000
Year of Construction		Jan. 01, 1999
Date of Acquisition		Mar. 01, 2005
Net Rentable Square Feet | ft²						295
Depreciation Life	[5]	30 years
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance, end of period	[2]	$ 50,501,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance, end of period		$ 15,769,000
Randolph Shopping Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location		Maryland
Initial Cost, Land	[1]					$ 4,928,000
Initial Cost, Buildings and Improvements	[1]					13,025,000
Net Improvements (Retirement) since Acquisition						1,154,000
Gross Amounts at Which Carried at December 31, 2016, Land						4,928,000
Gross Amounts at Which Carried at December 31, 2016, Buildings and Improvements						14,179,000
Gross Amounts at Which Carried at December 31, 2016, Total	[2]	$ 19,107,000				19,107,000
Accumulated Depreciation at December 31, 2016		$ 5,288,000				$ 5,288,000
Year of Construction		Jan. 01, 1972
Date of Acquisition		May 01, 2006
Net Rentable Square Feet | ft²						82
Depreciation Life	[5]	30 years
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance, end of period	[2]	$ 19,107,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance, end of period		$ 5,288,000
Montrose Shopping Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location		Maryland
Initial Cost, Land	[1]					$ 11,612,000
Initial Cost, Buildings and Improvements	[1]					22,410,000
Net Improvements (Retirement) since Acquisition						2,196,000
Gross Amounts at Which Carried at December 31, 2016, Land						11,020,000
Gross Amounts at Which Carried at December 31, 2016, Buildings and Improvements						25,198,000
Gross Amounts at Which Carried at December 31, 2016, Total	[2]	$ 36,218,000				36,218,000
Accumulated Depreciation at December 31, 2016		$ 9,289,000				$ 9,289,000
Year of Construction		Jan. 01, 1970
Date of Acquisition		May 01, 2006
Net Rentable Square Feet | ft²						145
Depreciation Life	[5]	30 years
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance, end of period	[2]	$ 36,218,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance, end of period		$ 9,289,000
Gateway Overlook [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location		Maryland
Initial Cost, Land	[1]					$ 28,816,000
Initial Cost, Buildings and Improvements	[1]					52,249,000
Net Improvements (Retirement) since Acquisition						622,000
Gross Amounts at Which Carried at December 31, 2016, Land						29,110,000
Gross Amounts at Which Carried at December 31, 2016, Buildings and Improvements						52,577,000
Gross Amounts at Which Carried at December 31, 2016, Total	[2]	$ 81,687,000				81,687,000
Accumulated Depreciation at December 31, 2016		$ 16,408,000				$ 16,408,000
Year of Construction		Jan. 01, 2007
Date of Acquisition		Dec. 01, 2010
Net Rentable Square Feet | ft²						220
Depreciation Life	[5]	30 years
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance, end of period	[2]	$ 81,687,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance, end of period		$ 16,408,000
Olney Village Center Member
Real Estate and Accumulated Depreciation [Line Items]
Location		Maryland
Initial Cost, Land	[1],[6]					$ 15,842,000
Initial Cost, Buildings and Improvements	[1],[6]					39,133,000
Net Improvements (Retirement) since Acquisition	[6]					1,970,000
Gross Amounts at Which Carried at December 31, 2016, Land	[6]					15,842,000
Gross Amounts at Which Carried at December 31, 2016, Buildings and Improvements	[6]					41,103,000
Gross Amounts at Which Carried at December 31, 2016, Total	[2],[6]	$ 56,945,000				56,945,000
Accumulated Depreciation at December 31, 2016		$ 8,252,000				$ 8,252,000
Year of Construction		Jan. 01, 1979
Date of Acquisition	[6]	Aug. 01, 2011
Net Rentable Square Feet | ft²						199
Depreciation Life	[5]	30 years
Loans Payable						$ 14,851,000			16,503,000
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance, end of period	[2],[6]	$ 56,945,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance, end of period		$ 8,252,000
Spring Vally Retail Center [Member]
Real Estate and Accumulated Depreciation [Line Items]
Location		Washington, DC
Initial Cost, Land	[1]					10,836,000
Initial Cost, Buildings and Improvements	[1]					32,238,000
Net Improvements (Retirement) since Acquisition	[7]					1,913,000
Gross Amounts at Which Carried at December 31, 2016, Land						10,836,000
Gross Amounts at Which Carried at December 31, 2016, Buildings and Improvements	[7]					34,151,000
Gross Amounts at Which Carried at December 31, 2016, Total	[2],[7]	$ 44,987,000				44,987,000
Accumulated Depreciation at December 31, 2016		$ 2,871,000				$ 2,871,000
Year of Construction		Jan. 01, 1941
Date of Acquisition		Oct. 01, 2014
Net Rentable Square Feet | ft²						78
Depreciation Life	[5]	30 years
Properties under development or held for future development						$ 1,100,000
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance, end of period	[2],[7]	$ 44,987,000
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance, end of period		$ 2,871,000
Riverside Developments [Member]
Real Estate and Accumulated Depreciation [Line Items]
Properties under development or held for future development						16,400,000			$ 16,400,000
Army Navy Building and Spring Valley Village [Member]
Real Estate and Accumulated Depreciation [Line Items]
Properties under development or held for future development						$ 4,800,000

[1] The purchase cost of real estate investments has been divided between land and buildings and improvements on the basis of management’s determination of the fair values.

[2] At December 31, 2016, total land, buildings and improvements are carried at $2,151.4 million for federal income tax purposes.

[3] Residential properties are presented in gross square feet.

[4] Includes non-cash accruals for capital items and assumed mortgages.

[5] The useful life shown is for the main structure. Buildings and improvements are depreciated over various useful lives ranging from 3 to 50 years.

[6] At December 31, 2016, our properties were encumbered by non-recourse mortgage amounts as follows: $32.9 million on The Kenmore, $14.9 million on Olney Village Center, $47.1 million on Yale West, and $49.6 million on The Amy Navy Building (prepaid at par in February 2017). Mortgage amounts exclude premiums and debt loan costs.

[7] As of December 31, 2016, Washington REIT had investments in various development and redevelopment projects, including Army Navy Building and Spring Valley Village. The total value of these various projects not yet placed in service is $4.8 million at December 31, 2016.

[8] The maturity date of the mortgage note is January 1, 2052, but can be prepaid, without penalty, beginning on January 31, 2022.

[9] As of December 31, 2016, Washington REIT had under development multifamily properties, the Wellington land parcel (Trove) and Riverside Apartments land parcel. The value not yet placed into service at December 31, 2016 was $19.0 million and $16.4 million, respectively.

[10] Interest only was payable monthly until the note was prepaid without penalty in October 2016.

[11] The note was prepaid without penalty in February 2016.

[12] The note was prepaid without penalty in February 2017.