Schedule III

v2.4.0.6

Schedule III	12 Months Ended
	Dec. 31, 2011
Real Estate and Accumulated Depreciation Disclosure [Abstract]
Real Estate and Accumulated Depreciation Disclosure	SCHEDULE III         Initial Cost (b)   Net Improvements (Retirement) since Acquisition   Gross Amounts at Which Carried at December 31, 2011   Accumulated Depreciation at December 31, 2011                     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 (a)   Washington, DC   $ 420,000   $ 2,678,000   $ 7,999,000   $ 420,000   $ 10,677,000   $ 11,097,000   $ 8,145,000   1951   Jan 1963   179,000   308   30 Years Roosevelt Towers   Virginia   $ 336,000   $ 1,996,000   $ 8,932,000   $ 336,000   $ 10,928,000   $ 11,264,000   $ 6,759,000   1964   May 1965   170,000   191   40 Years Country Club Towers   Virginia   $ 299,000   $ 2,562,000   $ 13,532,000   $ 299,000   $ 16,094,000   $ 16,393,000   $ 8,763,000   1965   Jul 1969   159,000   227   35 Years Park Adams   Virginia   $ 287,000   $ 1,654,000   $ 8,568,000   $ 287,000   $ 10,222,000   $ 10,509,000   $ 6,902,000   1959   Jan 1969   173,000   200   35 Years Munson Hill Towers   Virginia   $ 322,000   $ 3,337,000   $ 14,496,000   $ 322,000   $ 17,833,000   $ 18,155,000   $ 11,855,000   1963   Jan 1970   258,000   279   33 Years The Ashby at McLean   Virginia   $ 4,356,000   $ 17,102,000   $ 13,414,000   $ 4,356,000   $ 30,516,000   $ 34,872,000   $ 16,628,000   1982   Aug 1996   274,000   256   30 Years Walker House Apartments (a)   Maryland   $ 2,851,000   $ 7,946,000   $ 6,424,000   $ 2,851,000   $ 14,370,000   $ 17,221,000   $ 7,892,000   1971/03   Mar 1996   158,000   212   30 Years Bethesda Hill Apartments (a)   Maryland   $ 3,900,000   $ 13,412,000   $ 11,726,000   $ 3,900,000   $ 25,138,000   $ 29,038,000   $ 12,413,000   1986   Nov 1997   226,000   195   30 Years Bennett Park   Virginia   $ 2,861,000   $ 917,000   $ 78,969,000   $ 4,774,000   $ 77,973,000   $ 82,747,000   $ 16,432,000   2007   Feb 2001   214,000   224   28 Years The Clayborne   Virginia   $ 269,000   $ —   $ 30,376,000   $ 699,000   $ 29,946,000   $ 30,645,000   $ 7,288,000   2008   Jun 2003   60,000   74   26 Years The Kenmore (a)   Washington, DC   $ 28,222,000   $ 33,955,000   $ 839,000   $ 28,222,000   $ 34,794,000   $ 63,016,000   $ 4,431,000   1948   Sep 2008   268,000   374   30 Years 650 N. Glebe Rd (g)   Virginia   $ 12,787,000   $ —   $ 619,000   $ 13,406,000   $ —   $ 13,406,000   $ —   N/A   Jun 2011   —   —   N/A 1219 First Street (g)   Virginia   $ 14,046,000   $ —   $ 350,000   $ 14,396,000   $ —   $ 14,396,000   $ —   N/A   Nov 2011   —   —   N/A         $ 70,956,000   $ 85,559,000   $ 196,244,000   $ 74,268,000   $ 278,491,000   $ 352,759,000   $ 107,508,000           2,139,000   2,540     Office Buildings                                                     1901 Pennsylvania Avenue   Washington, DC   $ 892,000   $ 3,481,000   $ 13,985,000   $ 892,000   $ 17,466,000   $ 18,358,000   $ 12,918,000   1960   May 1977   98,000       28 Years 51 Monroe Street   Maryland   $ 840,000   $ 10,869,000   $ 22,095,000   $ 840,000   $ 32,964,000   $ 33,804,000   $ 23,326,000   1975   Aug 1979   218,000       41 Years 515 King Street   Virginia   $ 4,102,000   $ 3,931,000   $ 5,116,000   $ 4,102,000   $ 9,047,000   $ 13,149,000   $ 4,323,000   1966   Jul 1992   73,000       50 Years 6110 Executive Boulevard   Maryland   $ 4,621,000   $ 11,926,000   $ 10,447,000   $ 4,621,000   $ 22,373,000   $ 26,994,000   $ 14,418,000   1971   Jan 1995   199,000       30 Years 1220 19th Street   Washington, DC   $ 7,803,000   $ 11,366,000   $ 6,650,000   $ 7,802,000   $ 18,017,000   $ 25,819,000   $ 9,156,000   1976   Nov 1995   102,000       30 Years 1600 Wilson Boulevard   Virginia   $ 6,661,000   $ 16,742,000   $ 13,632,000   $ 6,661,000   $ 30,374,000   $ 37,035,000   $ 13,647,000   1973   Oct 1997   168,000       30 Years 7900 Westpark Drive   Virginia   $ 12,049,000   $ 71,825,000   $ 33,755,000   $ 12,049,000   $ 105,580,000   $ 117,629,000   $ 51,980,000   1972/'86/'99   Nov 1997   533,000       30 Years 600 Jefferson Plaza   Maryland   $ 2,296,000   $ 12,188,000   $ 5,307,000   $ 2,296,000   $ 17,495,000   $ 19,791,000   $ 7,594,000   1985   May 1999   113,000       30 Years 1700 Research Boulevard   Maryland   $ 1,847,000   $ 11,105,000   $ 3,378,000   $ 1,847,000   $ 14,483,000   $ 16,330,000   $ 7,129,000   1982   May 1999   101,000       30 Years Wayne Plaza   Maryland   $ 1,564,000   $ 6,243,000   $ 7,678,000   $ 1,564,000   $ 13,921,000   $ 15,485,000   $ 5,853,000   1970   May 2000   94,000       30 Years Courthouse Square   Virginia   $ —   $ 17,096,000   $ 4,884,000   $ —   $ 21,980,000   $ 21,980,000   $ 8,935,000   1979   Oct 2000   114,000       30 Years One Central Plaza   Maryland   $ 5,480,000   $ 39,107,000   $ 15,717,000   $ 5,480,000   $ 54,824,000   $ 60,304,000   $ 21,157,000   1974   Apr 2001   267,000       30 Years Atrium Building   Maryland   $ 3,182,000   $ 11,281,000   $ 2,844,000   $ 3,182,000   $ 14,125,000   $ 17,307,000   $ 5,626,000   1980   July 2002   80,000       30 Years 1776 G Street   Washington, DC   $ 31,500,000   $ 54,327,000   $ 4,193,000   $ 31,500,000   $ 58,520,000   $ 90,020,000   $ 18,549,000   1979   Aug 2003   262,000       30 Years Dulles Station II (f)   Virginia   $ 15,001,000   $ 494,000   $ (3,425,000 )   $ 4,130,000   $ 7,940,000   $ 12,070,000   $ —   n/a   Dec 2005   —       n/a West Gude (a)   Maryland   $ 11,580,000   $ 43,240,000   $ 5,817,000   $ 11,580,000   $ 49,057,000   $ 60,637,000   $ 10,659,000   1984/86/88   Aug 2006   275,000       30 Years 6565 Arlington Boulevard   Virginia   $ 5,584,000   $ 23,195,000   $ 4,120,000   $ 5,584,000   $ 27,315,000   $ 32,899,000   $ 6,215,000   1967   Aug 2006   130,000       30 Years Monument II   Virginia   $ 10,244,000   $ 65,205,000   $ 3,159,000   $ 10,244,000   $ 68,364,000   $ 78,608,000   $ 12,801,000   2000   Mar 2007   207,000       30 Years Woodholme Center   Maryland   $ 2,194,000   $ 16,711,000   $ 1,807,000   $ 2,194,000   $ 18,518,000   $ 20,712,000   $ 3,315,000   1989   Jun 2007   75,000       30 Years 2000 M Street   Washington, DC   $ —   $ 61,101,000   $ 7,731,000   $ —   $ 68,832,000   $ 68,832,000   $ 10,779,000   1971   Dec 2007   239,000       30 Years 2445 M Street (a)   Washington, DC   $ 46,887,000   $ 106,743,000   $ 2,002,000   $ 46,887,000   $ 108,745,000   $ 155,632,000   $ 13,033,000   1986   Dec 2008   290,000       30 Years Quantico Building E   Virginia   $ 4,518,000   $ 24,801,000   $ 63,000   $ 4,518,000   $ 24,864,000   $ 29,382,000   $ 2,234,000   2007   June 2010   134,000       30 Years Quantico Building G   Virginia   $ 4,897,000   $ 25,376,000   $ 48,000   $ 4,897,000   $ 25,424,000   $ 30,321,000   $ 2,373,000   2009   June 2010   136,000       30 Years 1140 Connecticut Avenue, NW   Washington, DC   $ 25,226,000   $ 50,495,000   $ 2,327,000   $ 25,226,000   $ 52,822,000   $ 78,048,000   $ 2,188,000   1966   Jan 2011   185,000       30 Years         Initial Cost (b)   Net Improvements (Retirement) since Acquisition   Gross Amounts at Which Carried at December 31, 2011   Accumulated Depreciation at December 31, 2011                     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) 1227 25th Street   Washington, DC   $ 17,505,000   $ 21,319,000   $ 467,000   $ 17,505,000   $ 21,786,000   $ 39,291,000   $ 874,000   1988   Mar 2011   132,000       30 Years John Marshall II (a)   Virginia   $ 13,490,000   $ 53,024,000   $ (41,000 )   $ 13,490,000   $ 52,983,000   $ 66,473,000   $ 646,000   1996   Sep 2011   223,000       30 Years Braddock Metro   Virginia   $ 18,817,000   $ 71,250,000   $ 112,000   $ 18,818,000   $ 71,361,000   $ 90,179,000   $ 1,157,000   1985   Sep 2011   345,000       30 Years         $ 258,780,000   $ 844,441,000   $ 173,868,000   $ 247,909,000   $ 1,029,180,000   $ 1,277,089,000   $ 270,885,000           4,793,000         Medical Office                                                     Woodburn Medical Park I   Virginia   $ 2,563,000   $ 12,460,000   $ 4,198,000   $ 2,563,000   $ 16,658,000   $ 19,221,000   $ 7,339,000   1984   Nov 1998   73,000       30 Years Woodburn Medical Park II   Virginia   $ 2,632,000   $ 17,574,000   $ 3,960,000   $ 2,632,000   $ 21,534,000   $ 24,166,000   $ 9,290,000   1988   Nov 1998   96,000       30 Years 8501 Arlington Boulevard (a)   Virginia   $ 2,071,000   $ 26,317,000   $ 914,000   $ 2,071,000   $ 27,231,000   $ 29,302,000   $ 8,036,000   2000   Oct 2003   92,000       30 Years 8503 Arlington Boulevard (a)   Virginia   $ 1,598,000   $ 25,850,000   $ 881,000   $ 1,598,000   $ 26,731,000   $ 28,329,000   $ 7,736,000   2001   Oct 2003   89,000       30 Years 8505 Arlington Boulevard (a)   Virginia   $ 2,819,000   $ 19,680,000   $ 612,000   $ 2,819,000   $ 20,292,000   $ 23,111,000   $ 6,065,000   2002   Oct 2003   75,000       30 Years Shady Grove Medical II   Maryland   $ 1,995,000   $ 16,601,000   $ 1,361,000   $ 1,995,000   $ 17,962,000   $ 19,957,000   $ 4,426,000   1999   Aug 2004   66,000       30 Years 8301 Arlington Boulevard   Virginia   $ 1,251,000   $ 6,589,000   $ 1,460,000   $ 1,251,000   $ 8,049,000   $ 9,300,000   $ 2,259,000   1965   Oct 2004   49,000       30 Years Alexandria Professional Center   Virginia   $ 6,783,000   $ 19,676,000   $ 4,164,000   $ 6,783,000   $ 23,840,000   $ 30,623,000   $ 4,896,000   1968   Apr 2006   114,000       30 Years 9707 Medical Center Drive (a)   Maryland   $ 3,069,000   $ 11,777,000   $ 863,000   $ 3,069,000   $ 12,640,000   $ 15,709,000   $ 2,812,000   1994   Apr 2006   38,000       30 Years 15001 Shady Grove Road   Maryland   $ 4,094,000   $ 16,410,000   $ 1,650,000   $ 4,094,000   $ 18,060,000   $ 22,154,000   $ 3,903,000   1999   Apr 2006   51,000       30 Years 15005 Shady Grove Road (a)   Maryland   $ 4,186,000   $ 17,548,000   $ 331,000   $ 4,186,000   $ 17,879,000   $ 22,065,000   $ 3,566,000   2002   Jul 2006   52,000       30 Years Plumtree Medical Center (a)   Maryland   $ 1,723,000   $ 5,749,000   $ 789,000   $ 1,723,000   $ 6,538,000   $ 8,261,000   $ 1,474,000   1991   Jun 2006   33,000       30 Years 2440 M Street   Washington, DC   $ 12,500,000   $ 37,321,000   $ 4,514,000   $ 12,500,000   $ 41,835,000   $ 54,335,000   $ 8,080,000   1986/06   Mar 2007   112,000       30 Years Woodholme Medical Center (a)   Maryland   $ 3,744,000   $ 24,587,000   $ 1,474,000   $ 3,744,000   $ 26,061,000   $ 29,805,000   $ 4,815,000   1996   Jun 2007   123,000       30 Years Ashburn Farm Professional Center (a)   Virginia   $ 3,770,000   $ 19,200,000   $ 1,006,000   $ 3,770,000   $ 20,206,000   $ 23,976,000   $ 3,570,000   1998/00/02   Jun 2007   75,000       30 Years CentreMed I & II   Virginia   $ 2,062,000   $ 12,506,000   $ 489,000   $ 2,062,000   $ 12,995,000   $ 15,057,000   $ 2,201,000   1998   Aug 2007   52,000       30 Years 4661 Kenmore Avenue (f)   Virginia   $ 3,764,000   $ —   $ 1,994,000   $ 5,758,000   $ —   $ 5,758,000   $ —   n/a   Aug 2007   —       n/a Sterling Medical Office   Virginia   $ 970,000   $ 5,274,000   $ 887,000   $ 970,000   $ 6,161,000   $ 7,131,000   $ 1,128,000   1986   May 2008   36,000       30 Years Lansdowne   Virginia   $ 1,308,000   $ 18,778,000   $ 2,205,000   $ 1,308,000   $ 20,983,000   $ 22,291,000   $ 1,767,000   2009   Aug 2009   85,000       30 Years         $ 62,902,000   $ 313,897,000   $ 33,752,000   $ 64,896,000   $ 345,655,000   $ 410,551,000   $ 83,363,000           1,311,000                 Initial Cost (b)   Net Improvements (Retirement) since Acquisition   Gross Amounts at Which Carried at December 31, 2011   Accumulated Depreciation at December 31, 2011                     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   $ 96,000   $ 415,000   $ 1,180,000   $ 1,595,000   $ 1,146,000   1962   Jul 1963   51,000       50 Years Westminster   Maryland   $ 519,000   $ 1,775,000   $ 9,041,000   $ 519,000   $ 10,816,000   $ 11,335,000   $ 5,801,000   1969   Sep 1972   150,000       37 Years Concord Centre   Virginia   $ 413,000   $ 850,000   $ 3,399,000   $ 413,000   $ 4,249,000   $ 4,662,000   $ 2,822,000   1960   Dec 1973   76,000       33 Years Wheaton Park   Maryland   $ 796,000   $ 857,000   $ 4,247,000   $ 796,000   $ 5,104,000   $ 5,900,000   $ 3,050,000   1967   Sep 1977   74,000       50 Years Bradlee   Virginia   $ 4,152,000   $ 5,383,000   $ 8,057,000   $ 4,152,000   $ 13,440,000   $ 17,592,000   $ 8,796,000   1955   Dec 1984   168,000       40 Years Chevy Chase Metro Plaza   Washington, DC   $ 1,549,000   $ 4,304,000   $ 4,811,000   $ 1,549,000   $ 9,115,000   $ 10,664,000   $ 5,344,000   1975   Sep 1985   49,000       50 Years Montgomery Village Center   Maryland   $ 11,625,000   $ 9,105,000   $ 2,953,000   $ 11,625,000   $ 12,058,000   $ 23,683,000   $ 4,814,000   1969   Dec 1992   198,000       50 Years Shoppes of Foxchase   Virginia   $ 5,838,000   $ 2,979,000   $ 13,017,000   $ 5,838,000   $ 15,996,000   $ 21,834,000   $ 4,239,000   1960   Jun 1994   134,000       50 Years Frederick County Square   Maryland   $ 6,561,000   $ 6,830,000   $ 2,781,000   $ 6,561,000   $ 9,611,000   $ 16,172,000   $ 5,552,000   1973   Aug 1995   227,000       30 Years 800 S. Washington Street   Virginia   $ 2,904,000   $ 5,489,000   $ 5,965,000   $ 2,904,000   $ 11,454,000   $ 14,358,000   $ 3,255,000   1951/'55/'59/'90   Jun 1998   47,000       30 Years Centre at Hagerstown .   Maryland   $ 13,029,000   $ 25,415,000   $ 1,995,000   $ 13,029,000   $ 27,410,000   $ 40,439,000   $ 8,800,000   2000   Jun 2002   332,000       30 Years Frederick Crossing (a)   Maryland   $ 12,759,000   $ 35,477,000   $ 1,675,000   $ 12,759,000   $ 37,152,000   $ 49,911,000   $ 8,959,000   1999-2003   Mar 2005   295,000       30 Years Randolph Shopping Center   Maryland   $ 4,928,000   $ 13,025,000   $ 625,000   $ 4,928,000   $ 13,650,000   $ 18,578,000   $ 2,874,000   1972   May 2006   82,000       30 Years Montrose Shopping Center   Maryland   $ 11,612,000   $ 22,410,000   $ 2,220,000   $ 11,612,000   $ 24,630,000   $ 36,242,000   $ 5,080,000   1970   May 2006   145,000       30 Years Gateway Overlook   Maryland   $ 28,816,000   $ 52,249,000   $ 290,000   $ 29,394,000   $ 51,961,000   $ 81,355,000   $ 2,862,000   2007   Dec 2010   223,000       30 Years Olney Village Center (a)   Maryland   $ 15,842,000   $ 39,133,000   $ 178,000   $ 15,842,000   $ 39,311,000   $ 55,153,000   $ 582,000   1979   Aug 2011   198,000       30 Years         $ 121,758,000   $ 226,365,000   $ 61,350,000   $ 122,336,000   $ 287,137,000   $ 409,473,000   $ 73,976,000           2,449,000         Total       $ 514,396,000   1,470,262,000   $ 465,214,000   $ 509,409,000   $ 1,940,463,000   $ 2,449,872,000   $ 535,732,000           10,692,000   2,540       a) At December 31, 2011, our properties were encumbered by non-recourse mortgage amounts as follows: $35,399,000 on 3801 Connecticut Avenue, $16,531,000 on Walker House, $29,099,000 on Bethesda Hill, $36,097,000 on The Kenmore, $30,761,000 on West Gude Drive,$95,593,000 on 2445 M Street, $53,936,000 on John Marshall II, $42,997,000 on Prosperity Medical Center, $4,780,000 on 9707 Medical Center Drive, $7,974,000 on 15005 Shady Grove Road, $4,419,000 on Plum Tree Medical Center, $19,954,000 on Woodholme Medical Center, $4,597,000 on Ashburn Farm, $21,700,000 on Frederick Crossing, and $23,873,000 on Olney Village Center. 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, 2011, total land, buildings and improvements are carried at $2,148,544,000 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, 2011, WRIT had land held for development in Herndon, VA (Dulles Station, Phase II). WRIT also held a 0.8 acre parcel of land at 4661 Kenmore for future medical office development. Additionally, WRIT had investments in various smaller development or redevelopment projects. The total land value not yet placed in service of these development projects at December 31, 2011 was $9.4 million. $0.5 million of Dulles Station, Phase II land was placed into service upon the completion of a portion of the parking garage structure. g) As of December 31, 2011, WRIT had under development via joint venture arrangements, a mid-rise multifamily property in Arlington, Virginia (650 North Glebe) and a high-rise multifamily property in Alexandria, Virginia (1219 First Street). The total land value not yet placed into service of these development projects via joint venture arrangements at December 31, 2011 was $27.8 million.
Reconciliation Of Carrying Amount Of Real Estate Investments [Text Block]	The following is a reconciliation of real estate assets and accumulated depreciation for the years ended December 31, 2011, 2010 and 2009: (In Thousands)   2011   2010   2009 Real estate assets             Balance, beginning of period   $ 2,443,127   $ 2,341,461   $ 2,326,646 Additions - property acquisitions*   352,658   140,584   20,086   - improvements*   36,386   28,196   30,399 Deductions - impairment write-down   (16,416 )   —   — Deductions - write-off of disposed assets   (1,648 )   (866 )   (2,451 ) Deductions - property sales   (364,235 )   (66,248 )   (33,219 ) Balance, end of period   $ 2,449,872   $ 2,443,127   $ 2,341,461 Accumulated depreciation             Balance, beginning of period   $ 538,786   $ 475,245   $ 406,241 Additions - depreciation   84,167   83,302   82,022 Deductions - impairment write-down   (1,291 )   —   — Deductions - write-off of disposed assets   (1,648 )   (866 )   (2,451 ) Deductions - property sales   (84,282 )   (18,895 )   (10,567 ) Balance, end of period   $ 535,732   $ 538,786   $ 475,245   * Includes non-cash accruals for capital items and assumed mortgages.