Washington Real Estate Investment Trust Annual report pursuant to Section 13 and 15(d)

Annual report pursuant to Section 13 and 15(d)

Real Estate Investments - Properties Sold or Held for Sale (Details)

Real Estate Investments - Properties Sold or Held for Sale (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended			12 Months Ended			1 Months Ended	0 Months Ended
	Mar. 31, 2014	Dec. 31, 2013 sqft	Mar. 31, 2013	Dec. 31, 2014 sqft	Dec. 31, 2013 sqft	Dec. 31, 2012 sqft	Sep. 30, 2013 agreements	Jan. 21, 2014	Dec. 20, 2012	Aug. 31, 2012
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Rentable Square Feet		1,172,000us-gaap_AreaOfRealEstateProperty		430,000us-gaap_AreaOfRealEstateProperty	1,172,000us-gaap_AreaOfRealEstateProperty	134,000us-gaap_AreaOfRealEstateProperty
Sale Price		$ 322,939		$ 195,161	$ 322,939	$ 23,000
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal				570	0	0
Gain on sale of real estate				105,985	22,144	5,124
Disposal Group, Including Discontinued Operation, Gain (Loss) on Disposal	106,000	18,900	3,200	106,555	22,144	5,124
Net income				106,531	37,539	15,940
Real Estate Held for Sale, Accumulated Depreciation		(46,066)		0	(46,066)
Investment in real estate sold or held for sale, net		79,901us-gaap_RealEstateHeldforsale		0us-gaap_RealEstateHeldforsale	79,901us-gaap_RealEstateHeldforsale
Other Liabilities Of Assets Held For Sale		1,533wre_OtherLiabilitiesOfAssetsHeldForSale		0wre_OtherLiabilitiesOfAssetsHeldForSale	1,533wre_OtherLiabilitiesOfAssetsHeldForSale
Depreciation and amortization				(96,011)	(97,901)	(103,934)
Income from properties sold or held for sale				546	15,395	10,816
Atrium Building [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income from properties sold or held for sale				0	185	1,063
Plumtree Medical Center [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income from properties sold or held for sale				0	0	197
Medical Office Porfolio [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income from properties sold or held for sale				546	15,210	9,331
Research Boulevard 1700 [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income from properties sold or held for sale				0	0	225
Medical Office Porfolio [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Sale Price							500,800
Number of Purchase and Sale Agreements							4
Real estate revenues				892	41,012	44,674
Net income				546	14,044	8,128
Discontinued operations (in dollars per share)				$ 0.01	$ 0.21	$ 0.12
Discontinued Properties Member
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Real estate revenues				892	45,791	54,344
Property expenses				(346)	(17,039)	(18,273)
Real estate impairment				0	0	(2,097)
Depreciation and amortization				0	(12,161)	(18,827)
Interest expense				0	(1,196)	(4,331)
Medical Office Building [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Real Estate Held-for-sale, Gross		125,967		0	125,967
Medical Office Building [Member] \| Medical Office Portfolio Transactions III & IV [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Rentable Square Feet				427,000
Sale Price				193,561
Gain on sale of real estate				105,985				105,985
Medical Office Building [Member] \| Plumtree Medical Center [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Rentable Square Feet						33,000
Sale Price						8,750
Gain on sale of real estate						1,400			1,400
Retail [Member] \| Gateway 7-11 [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Rentable Square Feet				3,000
Sale Price				1,600
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal				570
Office [Member] \| Atrium Building [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Rentable Square Feet		79,000			79,000
Sale Price		15,750			15,750
Gain on sale of real estate					3,195
Office [Member] \| 1700 Research Boulevard [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Rentable Square Feet						101,000
Sale Price						14,250
Gain on sale of real estate						3,724
Office [Member] \| Research Boulevard 1700 [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain on sale of real estate										3,724
Office [Member] \| Medical Office Porfolio [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of Buildings Sold							2
Medical Office And Office Building [Member] \| Medical Office Portfolio Transactions I & II [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Rentable Square Feet		1,093,000			1,093,000
Sale Price		307,189			307,189
Gain on sale of real estate					$ 18,949