7Baggers

Equity Commonwealth
(NYSE:EQC) 

EQC stock logo

Equity Commonwealth (NYSE: EQC) is a Chicago based, internally managed and self-advised real estate investment trust (REIT) with commercial office properties in the United States. EQC's same property portfolio is comprised of 4 properties and 1.5 million square feet.

Founded: 1986
Full Time Employees: 28
Sector: Real Estate
Industry: REIT-Office

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At a glance:
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Quarterly
Annual
    Unit: USD2025-09-30 2025-03-31 2024-12-31 2024-10-31 2024-09-30 2024-06-30 2024-03-31 2023-12-31 2023-09-30 2023-06-30 2023-03-31 2022-12-31 2022-09-30 2022-06-30 2022-03-31 2021-12-31 2021-09-30 2021-06-30 2021-03-31 2020-12-31 2020-09-30 2020-06-30 2020-03-31 2019-12-31 2019-09-30 2019-06-30 2019-03-31 2018-12-31 2018-09-30 2018-06-30 2018-03-31 2017-12-31 2017-09-30 2017-06-30 2017-03-31 2016-12-31 2016-09-30 2016-06-30 2016-03-31 2015-12-31 2015-09-30 2015-06-30 2015-03-31 2014-12-31 2014-09-30 2014-06-30 2014-03-31 2013-09-30 2013-06-30 2013-03-31 2012-09-30 2012-06-30 2012-03-31 2011-09-30 2011-06-30 2011-03-31 2010-09-30 2010-06-30 2010-03-31 2004-12-31 2004-09-30 2004-06-30 2004-03-31 2003-09-30 2003-06-30 2003-03-31 2002-12-31 
                                                                       
      revenues:
                                                                       
      rental revenue
     13,893,000  15,845,000 12,782,000 12,816,000 13,893,000 13,824,000 13,928,000 13,358,000 14,226,000 14,628,000 13,869,000 14,426,000 15,840,000 13,503,000 13,141,000 14,114,000 14,169,000 14,001,000 15,742,000 15,248,000 17,143,000 23,410,000 23,995,000 30,574,000 38,890,000                                         
      other revenue
     1,297,000  1,392,000 1,206,000 1,293,000 1,297,000 1,322,000 1,284,000 1,232,000 1,350,000 1,159,000 1,257,000 1,115,000 846,000 892,000 740,000 761,000 682,000 707,000 743,000 1,017,000 1,677,000 2,585,000 2,740,000 2,794,000 2,862,000                                         
      total revenues
     15,190,000  17,237,000 13,988,000 14,109,000 15,190,000 15,146,000 15,212,000 14,590,000 15,576,000 15,787,000 15,126,000 15,541,000 16,686,000 14,395,000 13,881,000 14,875,000 14,851,000 14,708,000 16,485,000 16,265,000 18,820,000 25,995,000 26,735,000 33,368,000 41,752,000 42,925,000 46,873,000 48,636,000 58,588,000 71,623,000 77,798,000 91,599,000 99,551,000 103,546,000 114,632,000 145,367,000 137,135,000 138,934,000 159,208,000 203,694,000 213,055,000 212,808,000 216,595,000 215,194,000 217,260,000             108,919,500 160,419,000 138,945,000 136,578,000 127,538,000 121,720,000 120,633,000  
      yoy
     7.66%  13.81% -8.05% -3.30% -2.48% -4.06% 0.57% -6.12% -6.65% 9.67% 8.97% 4.48% 12.36% -2.13% -15.80% -8.55% -21.09% -43.42% -38.34% -51.26% -54.92% -39.44% -42.96% -31.39% -28.74% -40.07% -39.75% -46.90% -41.15% -30.83% -32.13% -36.99% -27.41% -25.47% -28.00% -28.63% -35.63% -34.71% -26.50% -5.34% -1.94%                 -14.60% 31.79% 15.18%      
      qoq
       23.23% -0.86% -7.12% 0.29% -0.43% 4.26% -6.33% -1.34% 4.37% -2.67% -6.86% 15.92% 3.70% -6.68% 0.16% 0.97% -10.78% 1.35% -13.58% -27.60% -2.77% -19.88% -20.08% -2.73% -8.42% -3.62% -16.99% -18.20% -7.94% -15.07% -7.99% -3.86% -9.67% -21.14% 6.00% -1.29% -12.73% -21.84% -4.39% 0.12% -1.75% 0.65% -0.95%              -32.10% 15.46% 1.73% 7.09% 4.78% 0.90%   
      expenses:
                                                                       
      operating expenses
     6,534,000  7,344,000 6,863,000 6,721,000 6,534,000 6,542,000 6,722,000 6,942,000 7,256,000 6,986,000 6,073,000 6,592,000 4,533,000 6,582,000 6,102,000 6,588,000 6,621,000 6,976,000 6,444,000 6,677,000 8,761,000 9,741,000 9,923,000 10,974,000 15,780,000 15,539,000 20,257,000 19,521,000 24,599,000 30,674,000 32,380,000 37,284,000 41,087,000 42,742,000 49,313,000 51,393,000 57,258,000 63,820,000 73,571,000 89,686,000 97,871,000 94,158,000 99,392,000 92,701,000 101,731,000 94,632,000 109,754,000 109,659,000 112,577,000 108,093,000 104,090,000 100,912,000 90,161,000 90,407,000 93,722,000 89,147,000 89,574,000 65,049,000 60,251,000 51,537,000 51,016,000 50,034,000 45,686,000 46,025,000  
      depreciation and amortization
     4,357,000  4,691,000 4,214,000 4,182,000 4,357,000 4,184,000 4,436,000 4,514,000 4,310,000 4,634,000 4,451,000 4,313,000 4,412,000 4,403,000 4,588,000 4,432,000 4,351,000 4,680,000 5,137,000 4,398,000 5,114,000 6,037,000 5,939,000 7,561,000 8,585,000 10,830,000 11,287,000 13,021,000 13,903,000 18,738,000 21,133,000 23,922,000 26,915,000 29,040,000 29,184,000 37,331,000 36,251,000 37,143,000 40,522,000 53,637,000 62,699,000 58,839,000 57,213,000 59,831,000 51,649,000 52,150,000 67,389,000 66,523,000 63,437,000 63,552,000 61,351,000 56,389,000 51,973,000 53,841,000 48,520,000 49,658,000 49,780,000 33,097,000 29,192,000 25,048,000 25,043,000 27,774,000 20,895,000 20,274,000  
      general and administrative
     8,323,000  11,409,000 8,886,000 8,356,000 8,323,000 7,504,000 7,061,000 13,854,000 8,555,000 7,137,000 7,593,000 7,646,000 8,002,000 6,753,000 7,572,000 7,390,000 15,729,000 7,136,000 7,191,000 8,302,000 10,604,000 8,290,000 8,523,000 9,533,000 12,096,000 8,973,000 10,905,000 11,222,000 13,339,000 12,033,000 11,689,000 11,960,000 12,078,000 11,490,000 13,277,000 12,177,000 13,312,000 13,739,000 16,249,000 10,911,000 16,558,000 16,760,000 47,450,000 24,097,000 24,848,000 25,069,000 21,653,000 17,266,000 14,592,000 13,364,000 12,310,000 11,450,000 11,618,000 10,951,000 10,658,000 10,296,000 9,984,000 6,696,000 6,946,000 5,830,000 5,698,000 4,951,000 4,872,000 4,500,000  
      total expenses
     19,214,000  -26,782,000 70,189,000 19,259,000 19,214,000 18,230,000 18,219,000 25,310,000 20,121,000 18,757,000 18,117,000 18,551,000 16,947,000 17,738,000 18,262,000 18,410,000 26,701,000 18,792,000 18,772,000 19,377,000 24,479,000 24,068,000 24,385,000 28,068,000 36,461,000 35,342,000 42,449,000 43,764,000 63,928,000 61,445,000 65,202,000 91,594,000 81,366,000 98,012,000 91,774,000 144,637,000 106,821,000 114,702,000 130,342,000 169,492,000 179,032,000 336,902,000 204,055,000 199,312,000 173,472,000 171,415,000 198,941,000 194,076,000 191,672,000 186,443,000 180,253,000 173,556,000 156,167,000 157,844,000 154,459,000 150,204,000 149,648,000 104,842,000 96,389,000 107,616,000 110,848,000 106,805,000 98,002,000 97,629,000  
      interest and other income
     29,512,000  25,389,000 29,996,000 29,770,000 29,512,000 29,670,000 29,269,000 27,352,000 28,376,000 24,263,000 15,145,000 5,963,000 1,574,000 1,732,000 1,599,000 1,626,000 1,843,000 2,284,000 2,606,000 4,443,000 11,895,000 14,521,000 19,401,000 20,695,000 17,775,000 15,741,000 12,626,000 12,668,000 5,780,000 8,393,000 7,596,000 6,019,000 4,372,000 3,147,000 3,013,000 2,204,000 1,967,000 1,176,000 637,000 728,000 3,448,000 490,000 406,000 281,000 384,000 227,000 250,000 458,000 399,000 413,000 288,000 369,000 392,000 824,000 572,000 447,000 1,118,000   144,000 120,000 104,000 107,000 43,000  
      income before income taxes
     25,488,000  69,408,000 -26,205,000 24,620,000 25,488,000 26,586,000 26,262,000 16,632,000 23,831,000 21,300,000 12,244,000 2,953,000 1,313,000 -1,611,000 -2,782,000 -1,909,000 -10,007,000 -1,592,000 441,000 27,945,000 425,547,000 16,161,000 23,375,000 242,717,000 211,897,000 15,962,000 32,842,000 36,591,000 190,669,000 -21,624,000 33,559,000 -5,766,000 23,997,000 55,274,750 86,613,000 88,009,000 46,477,000                             
      income tax expense
     -30,000  -1,380,000 -22,000 -434,000 -30,000 40,000 -30,000 -796,000 -1,080,000 -372,000 -23,000 -50,000 -8,000 -26,000 -32,000 -31,000 -31,000   -59,000 -40,000    -1,300,000 -540,000 -65,000  -3,007,000 55,000 -335,000 -45,000 -175,000 -280,000 -225,000 -165,000  13,000 -23,000 -2,915,000  -1,025,000 -703,000                       
      net income
     25,458,000  68,028,000 -26,227,000 24,186,000 25,458,000 26,626,000 26,232,000 15,836,000 22,751,000 20,928,000 12,221,000 2,903,000 1,305,000 -1,637,000 -2,814,000 -1,940,000 -10,038,000 -1,670,000 370,000 27,886,000 425,507,000 15,996,000 23,896,000 242,377,000 210,597,000 15,422,000 32,777,000 37,047,000 187,662,000 -21,569,000 33,224,000 -5,811,000 23,822,000 12,260,000 86,388,000 87,844,000 46,402,000 43,145,000 30,466,000 12,616,000 13,630,000 -158,561,000 156,740,000 5,385,000 20,448,000 -227,466,000 28,917,000 35,624,000 22,265,000 20,586,000 24,574,000 28,535,000 19,964,000 46,612,000 65,810,000 9,998,000 37,297,000 41,993,000 36,401,000 35,060,000 49,375,000 24,619,000 27,371,000 27,292,000  
      yoy
     5.26%  155.49% -199.98% 52.73% 11.90% 27.23% 114.65% 445.50% 1643.37% -1378.44% -534.29% -249.64% -113.00% -1.98% -860.54% -106.96% -102.36% -110.44% -98.45% -88.49% 102.05% 3.72% -27.10% 554.24% 12.22% -171.50% -1.35% -737.53% 687.77% -275.93% -61.54% -106.62% -48.66% -71.58% 183.56% 596.29% 240.44% -127.21% -80.56% 134.28% -33.34% -30.29% 442.03% -84.88% -8.16% -1204.95% 17.67% 24.84% 11.53% -55.84% -62.66% 185.41% -46.47% 11.00% 80.79% -71.48% -24.46% 70.57% 32.99% 28.46%      
      qoq
       -359.38% -208.44% -5.00% -4.39% 1.50% 65.65% -30.39% 8.71% 71.25% 320.98% 122.45% -179.72% -41.83% 45.05% -80.67% 501.08% -551.35% -98.67% -93.45% 2560.08% -33.06% -90.14% 15.09% 1265.56% -52.95% -11.53% -80.26% -970.05% -164.92% -671.74% -124.39% 94.31% -85.81% -1.66% 89.31% 7.55% 41.62% 141.49% -7.44% -108.60% -201.16% 2810.68% -73.66% -108.99% -886.62% -18.83% 60.00% 8.16% -16.23% -13.88% 42.93% -57.17% -29.17% 558.23% -73.19% -11.18% 15.36% 3.82% -28.99% 100.56% -10.05% 0.29%   
      net income margin %
    NaN% 167.60%  394.66% -187.50% 171.42% 167.60% 175.80% 172.44% 108.54% 146.06% 132.56% 80.79% 18.68% 7.82% -11.37% -20.27% -13.04% -67.59% -11.35% 2.24% 171.45% 2260.93% 61.53% 89.38% 726.38% 504.40% 35.93% 69.93% 76.17% 320.31% -30.11% 42.71% -6.34% 23.93% 11.84% 75.36% 60.43% 33.84% 31.05% 19.14% 6.19% 6.40% -74.51% 72.37% 2.50% 9.41% -Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% 38.55% 22.69% 25.23% 36.15% 19.30% 22.49% 22.62%  
      net income attributable to noncontrolling interest
     -53,000    -36,000 -53,000 -51,000 -86,000 -52,000 -66,000         4,000 -1,000 -54,000 -748,000 -6,000 -10,000 -91,000 -79,000 -5,000 -13,000  -63,000 8,000 -12,000  -8,000                                 
      net income attributable to equity commonwealth
     25,405,000  67,798,000 -26,189,000 24,150,000 25,405,000 26,549,000 26,146,000 15,784,000 22,685,000 20,875,000 12,190,000 2,896,000 1,302,000 -1,634,000 -2,808,000 -1,936,000 -10,018,000 -1,666,000 369,000 27,832,000 424,759,000 15,990,000 23,886,000 242,286,000 210,518,000 15,417,000 32,764,000 37,033,000 187,599,000 -21,561,000 33,212,000 -5,809,000 23,814,000         -158,561,000 156,740,000 5,385,000                      
      preferred distributions
     -1,997,000  -1,997,000 -1,997,000 -1,997,000 -1,997,000 -1,997,000 -1,997,000 -1,997,000 -1,997,000 -1,997,000 -1,997,000 -1,997,000 -1,997,000 -1,997,000 -1,997,000 -1,997,000 -1,997,000 -1,997,000 -1,997,000 -1,997,000 -1,997,000 -1,997,000 -1,997,000 -1,997,000 -1,997,000 -1,997,000 -1,997,000 -1,997,000 -1,997,000 -1,997,000 -1,997,000 -1,997,000 -1,997,000 -1,997,000 -1,997,000 -6,981,000 -6,981,000 -6,981,000 -6,981,000 -6,981,000 -6,981,000 -6,981,000 -6,981,000                       
      net income attributable to equity commonwealth common shareholders
     23,408,000  65,801,000 -28,186,000 22,153,000 23,408,000 24,552,000 24,149,000 13,787,000 20,688,000 18,878,000 10,193,000 899,000 -695,000 -3,631,000 -4,805,000 -3,933,000 -12,015,000 -3,663,000 -1,628,000 25,835,000 422,762,000 13,993,000 21,889,000 240,289,000 208,521,000 13,420,000 30,767,000 35,036,000 185,602,000 -23,558,000 31,215,000 -7,806,000 21,817,000 10,263,000 84,391,000 71,254,000 39,421,000 36,164,000 23,485,000 5,635,000 6,649,000                         
      weighted-average common shares outstanding — basic
    107,373,000 107,216,000  108,841,000 107,456,000 107,416,000 107,216,000 108,841,000 108,931,000 109,839,000 109,720,000 111,674,000 111,305,000 112,005,000 113,740,000 121,411,000 122,190,000 122,189,000 122,002,000 121,786,000 121,673,000 121,655,000 122,148,000 122,091,000 122,140,000 122,122,000 121,960,000 122,314,000 121,845,000 121,822,000 123,867,000 124,125,000 124,089,000 124,067,000 124,047,000 125,474,000 125,533,000 125,508,000 125,840,000 128,621,000 128,739,000 129,733,000 129,696,000  128,880,000        83,722,000  72,144,000 72,139,000 65,173,000 64,595,000 226,927,000         
      weighted-average common shares outstanding — diluted
    108,320,000 108,224,000  110,185,000 107,456,000 108,751,000 108,224,000 110,185,000 110,217,000 111,237,000 111,300,000 112,825,000 112,596,000 113,380,000 113,740,000 121,411,000 122,190,000 122,189,000 122,002,000 126,606,000 121,673,000 123,255,000 126,605,000 126,260,000 123,564,000 125,862,000 125,822,000 123,385,000 122,851,000 122,649,000 127,097,000 125,129,000 125,175,000 124,067,000 125,150,000 126,768,000 126,568,000 126,937,000 127,522,000 129,437,000 129,878,000 130,537,000 129,874,000  131,243,000        91,020,000  79,442,000 79,437,000 72,471,000 71,893,000 256,120,000         
      earnings per common share attributable to equity commonwealth common shareholders:
                                                                       
      basic
     220  600 -260 210 220 220 220 130 190 170 90 10 -10 -30 -40 -30 -100 -30 -10 210 3,460 110 180 1,970 1,710 120 250 290 1,500 -190 250 -60 180 387.5 670 570 310                             
      diluted
     220  590 -260 200 220 220 220 120 190 170 90 10 -10 -30 -40 -30 -100 -30 -10 210 3,350 110 180 1,930 1,670 110 250 290 1,480 -190 250 -60 170 385 670 560 310                             
      loss on asset impairment
       12,556,500 50,226,000                          12,087,000   18,428,000 1,286,000 14,740,000  43,736,000    15,258,000  167,145,000  22,683,000                      
      net income (income) attributable to noncontrolling interest
       -12,750 38,000           3,000 6,000 4,000 20,000               2,000                                  
      distributions declared per common share
           1,062.5   4,250 250 1,000       875 3,500   875 3,500   625 2,500               62.5                        
      gain on sale of properties
               7,000 90,000       208,000  26,916,000 419,620,000 24,000 1,945,000 227,166,000 193,037,000 -1,608,000 20,877,000 26,937,000 205,211,000 -29,172,000 25,080,000 3,136,000 16,454,000 25,676,000 82,169,000 106,375,000 36,666,000 41,468,000 39,793,000 -2,708,000 5,868,000       1,596,000 1,689,000 350,000    34,572,000 22,832,000 11,504,000          
      net (income) loss attributable to noncontrolling interest
               -53,000 -31,000 -7,000 -3,000               -14,000                                      
      interest expense
                        -9,000 -302,000 -309,000 -311,000 -321,000 -4,070,000 -4,206,000 -5,035,000 -5,085,000 -6,350,000 -10,115,000 -10,796,000 -11,510,000 -14,863,000 -15,014,000 -19,255,000 -21,427,000 -21,300,000 -22,347,000 -24,390,000 -25,111,000 -27,973,000 -29,842,000 -32,151,000 -35,245,000                       
      gain on early extinguishment of debt
                        131,000               -2,562,000    550,000 -3,887,000 10,426,000  -1,790,000 6,699,000         310,000              
      income tax benefit
                       -42,500 -71,000   -279,750 521,000 -340,000    456,000         -75,000    561,000              34,000           
      loss on early extinguishment of debt
                             -6,374,000  -719,000  -1,536,000 -4,867,000 -66,500 -203,000 -63,000     -118,000    -428,000                    2,866,000  1,487,000   
      rental income
                               31,527,000 34,138,000 35,211,000 43,549,000 54,672,000 61,091,000 74,352,000 80,205,000 84,726,000 92,722,000 121,735,000 109,888,000 113,254,000 125,459,000 163,697,000 167,972,000 173,036,000 174,216,000 172,407,000 172,040,000 201,741,000 274,766,000 275,048,000 261,661,000 255,374,000 251,246,000 238,790,000 222,181,000 214,362,000 218,035,000 213,966,000 213,626,000 167,551,000 160,419,000 138,801,000 136,458,000 127,434,000 121,613,000 120,590,000  
      tenant reimbursements and other income
                               11,398,000 12,735,000 13,425,000 15,039,000 16,951,000 16,707,000 17,247,000 19,346,000 18,820,000 21,910,000 23,632,000 27,247,000 25,680,000 33,749,000 39,997,000 45,083,000 39,772,000 42,379,000 42,787,000 45,220,000                     
      operating income
                               7,583,000 4,424,000 4,872,000 -5,340,000 10,178,000 12,596,000 5,000 18,185,000 5,534,000 22,858,000 730,000 30,314,000 24,232,000 28,866,000 34,202,000 34,023,000 -124,094,000 12,540,000 15,882,000 43,788,000 30,326,000 75,825,000 80,972,000 69,989,000 68,931,000 70,993,000 65,234,000 66,014,000 56,518,000 63,576,000 63,762,000 63,978,000 62,709,000 64,030,000       
      yoy
                               -25.50% -64.88% 97340.00% -129.36% 83.92% -44.89% -99.32% -40.01% -77.16% -20.81% -97.87% -10.90% -119.53% 130.19% 115.35% -22.30% -509.20% -83.46% -80.39% -37.44% -56.01% 6.81% 24.13% 6.02% 21.96% 11.67% 2.31% 3.18% -9.87% -0.71%           
      qoq
                               71.41% -9.20% -191.24% -152.47% -19.20% 251820.00% -99.97% 228.60% -75.79% 3031.23% -97.59% 25.10% -16.05% -15.60% 0.53% -127.42% -1089.59% -21.04% -63.73% 44.39% -60.01% -6.36% 15.69% 1.53% -2.90% 8.83% -1.18% 16.80% -11.10% -0.29% -0.34% 2.02% -2.06%        
      operating margin %
    NaN% 0%  0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 17.67% 9.44% 10.02% -9.11% 14.21% 16.19% 0.01% 18.27% 5.34% 19.94% 0.50% 22.11% 17.44% 18.13% 16.79% 15.97% -58.31% 5.79% 7.38% 20.15% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% 57.57% 39.91% 0% 0% 0% 0% 0%  
      foreign currency exchange loss
                                          -5,000 96,000 -9,809,000                           
      excess fair value of consideration paid over carrying value of preferred shares
                                         -9,609,000                              
      foreign currency exchange gain
                                             856,000                          
      acquisition related costs
                                                  5,000  145,000 628,000 1,066,000 1,434,000 2,502,000 4,805,000 2,415,000 2,645,000 1,559,000           
      gain on sale of equity investment
                                               -160,000 171,754,000     66,293,000                  
      gain on issuance of shares by an equity investee
                                                 16,911,000 109,000       11,177,000              
      income from continuing operations before income taxes and equity in earnings of investees
                                           43,132,000 30,489,000 15,531,000 13,069,000                         
      equity in earnings of investees
                                                1,072,000 12,454,000 10,934,000 10,492,000 159,000 4,262,000 2,868,000 2,829,000 2,958,000 2,768,000 2,910,000 2,712,000            
      income from continuing operations
                                           43,145,000 30,466,000 12,616,000 13,630,000 -158,730,000 156,523,000 6,688,000 16,725,000 901,000 31,718,000 38,626,000 20,576,000 20,236,000 24,574,000 30,128,000 21,026,000 12,294,000 61,616,000 10,065,000 37,189,000         
      discontinued operations:
                                                                       
      income from discontinued operations
                                               169,000 95,000 4,114,000 4,011,000 -1,830 -20 -50    653,000 -10 480 60  108,000         
      gain on asset impairment from discontinued operations
                                               -559,500 122,000                       
      loss on early extinguishment of debt from discontinued operations
                                                                       
      excess fair value of consideration over carrying value of preferred shares
                                                                       
      amounts attributable to equity commonwealth common shareholders:
                                                                       
      basic earnings per common share attributable to equity commonwealth common shareholders:
                                                                       
      diluted earnings per common share attributable to equity commonwealth common shareholders:
                                                                       
      loss on sale of equity investment
                                                                       
      loss on asset impairment from discontinued operations
                                                                       
      basic and diluted earnings per common share attributable to equity commonwealth common shareholders:
                                                                       
      loss (reversal of loss) on asset impairment
                                              1,904,000                         
      income from continuing operations before income tax expense and equity in earnings of investees
                                               -157,705,000 156,154,000  6,346,000                     
      net gain on sale of properties from discontinued operations
                                                                       
      income before gain on sale of properties
                                               -158,561,000 156,740,000 5,385,000 20,448,000  28,917,000 34,028,000 20,576,000 20,236,000  28,535,000 19,964,000             
      net income attributable to noncontrolling interest in consolidated subsidiary
                                                                       
      distribution on conversion of preferred shares
                                               -4,051,250                        
      net income available for equity commonwealth common shareholders
                                               35,313,500 149,759,000 -17,802,000                      
      amounts available for equity commonwealth common shareholders:
                                                                       
      basic and diluted earnings per common share available for equity commonwealth common shareholders:
                                                                       
      net income available for common shareholders
                                               285 1,160 -140 80 -1,920 70 150  30 120 14,712,000 9,464,000 37,773,000 53,143,000 -2,669,000 24,630,000 30,493,000 24,901,000 23,560,000 37,875,000 13,119,000 15,871,000 15,792,000  
      gain on sale of equity investments
                                                                       
      weighted-average common shares outstanding — basic and diluted
                                                 123,812,000 118,400,000 118,328,000 118,309,000 94,154,000 83,745,000 83,727,000                
      reversal of loss on asset impairment
                                                                       
      gain on sale of properties from discontinued operations
                                                    2,099,000 1,260,000    7,001,000              
      net income attributable to commonwealth reit
                                                  20,448,000  18,889,000 25,667,000 17,618,000 16,065,000 23,680,000               
      net income available for commonwealth reit common shareholders
                                                  9,297,000 -227,466,000 7,738,000 14,516,000 -122,000 2,242,000 9,857,000               
      amounts attributable to commonwealth reit common shareholders:
                                                                       
      basic and diluted earnings per common share attributable to commonwealth reit common shareholders:
                                                                       
      income from continuing operations before income tax expense
                                                   1,686,000 32,472,000 39,614,000 21,898,000 20,328,000 25,066,000 30,435,000 21,116,000 12,640,000 61,582,000 10,246,000 37,371,000         
      excess redemption price paid over carrying value of preferred shares
                                                                       
      weighted-average common shares outstanding – basic
                                                         81,536,000              
      weighted-average common shares outstanding – diluted
                                                         88,834,000              
      basic and diluted earnings per common share:
                                                                       
      income from continuing operations available for common shareholders
                                                         200 150 50 750 -40 110         
      equity in earnings of equity investments
                                                            1,999,000 2,305,000 2,339,000 4,322,000 3,604,000 3,731,000 3,800,000 3,886,000 3,653,000 4,288,000  
      gain on issuance of shares by equity investee
                                                            18,390,000  16,418,000         
      acquisition costs
                                                             1,103,000 310,000         
      gain on sale of property
                                                                       
      interest income
                                                               184,000 190,000       
      gain on sale of shares of equity investments
                                                               6,745,000        
      gain on issuance of shares by equity investees
                                                               3,396,000        
      weighted-average common shares outstanding
                                                               176,157,000 177,285,000 177,276,000 172,724,000 142,717,000 130,521,000 128,846,000  
      interest
                                                                 25,201,000 26,225,000 24,046,000 25,062,000 25,079,000  
      income before equity in earnings of equity investments
                                                                 31,329,000 25,730,000 20,733,000 23,718,000 23,004,000  
      gain on equity transactions of equity investments
                                                                  19,845,000     
      loss on equity transaction of equity investments
                                                                       
      early extinguishment of debt
                                                                     1,751,000  
    Balance Sheets:
    Quarterly
    Annual
      Unit: USD2025-03-31 2024-12-31 2024-09-30 2024-06-30 2024-03-31 2023-12-31 2023-09-30 2023-06-30 2023-03-31 2022-12-31 2022-09-30 2022-06-30 2022-03-31 2021-12-31 2021-09-30 2021-06-30 2021-03-31 2020-12-31 2020-09-30 2020-06-30 2020-03-31 2019-12-31 2019-09-30 2019-06-30 2019-03-31 2018-12-31 2018-09-30 2018-06-30 2018-03-31 2017-12-31 2017-09-30 2017-06-30 2017-03-31 2016-12-31 2016-09-30 2016-06-30 2016-03-31 2015-12-31 2015-09-30 2015-06-30 2015-03-31 2014-12-31 2014-09-30 2014-06-30 2014-03-31 2013-09-30 2013-06-30 2013-03-31 2012-09-30 2012-06-30 2012-03-31 2011-09-30 2011-06-30 2011-03-31 2010-09-30 2010-06-30 2010-03-31 2009-09-30 2009-06-30 2009-03-31 2008-09-30 2008-06-30 2008-03-31 2007-12-31 2007-09-30 2007-06-30 2007-03-31 2006-12-31 2006-09-30 2006-06-30 2006-03-31 2005-12-31 2005-09-30 2005-06-30 2005-03-31 2004-12-31 2004-09-30 2004-06-30 2004-03-31 2003-12-31 2003-09-30 2003-06-30 2003-03-31 2002-12-31 
                                                                                          
        assets
                                                                                          
        real estate
       132,500,000                                                                                   
        cash and cash equivalents
      227,271,000 160,511,000 2,225,150,000 2,195,823,000 2,170,834,000 2,160,535,000 2,127,788,000 2,153,047,000 2,128,688,000 2,582,222,000 2,692,354,000 2,691,503,000 2,721,929,000 2,800,998,000 2,961,564,000 2,965,788,000 2,971,052,000 2,987,225,000 3,418,240,000 3,437,775,000 3,348,349,000 2,795,642,000 3,205,775,000 3,180,548,000 3,069,501,000 2,400,803,000 2,673,328,000 2,507,117,000 2,837,671,000 2,351,693,000 2,233,077,000 1,967,549,000 1,888,537,000 2,094,674,000 2,405,174,000 1,772,337,000 1,742,128,000 1,802,729,000 1,649,162,000 1,286,902,000 421,736,000 379,058,000 597,405,000 428,373,000 177,555,000 165,990,000 77,520,000 48,692,000 72,680,000 138,805,000 193,587,000 210,673,000 55,035,000 25,389,000 174,723,000 33,443,000 138,702,000 33,227,000 38,138,000 35,317,000 24,851,000 33,277,000 32,065,000 19,879,000 25,639,000 29,026,000 23,059,000 17,783,000 33,458,000 35,099,000 35,587,000 19,445,000 21,514,000 18,921,000 22,335,000 21,961,000 26,569,000 19,553,000 43,609,000 11,526,000 21,044,000 18,698,000 24,583,000 12,384,000 
        rents receivable and other assets
      386,000 613,000                                                                                   
        total assets
      227,657,000 293,624,000 2,441,130,000 2,463,741,000 2,439,686,000 2,425,041,000 2,393,786,000 2,421,843,000 2,399,324,000 2,854,885,000 2,968,520,000 2,968,480,000 3,000,018,000 3,081,383,000 3,244,603,000 3,256,268,000 3,260,676,000 3,277,671,000 3,708,774,000 3,733,155,000 3,704,057,000 3,319,377,000 3,731,343,000 3,702,171,000 3,713,937,000 3,530,772,000 3,813,728,000 3,776,874,000 4,137,306,000 4,236,945,000 4,260,289,000 4,491,116,000 4,518,756,000 4,526,075,000 4,965,767,000 4,911,775,000 5,103,149,000 5,244,372,000 5,324,243,000 5,548,046,000 5,734,296,000 5,761,639,000 6,170,796,000 6,593,360,000 6,600,714,000 6,821,987,000 8,019,538,000 8,082,668,000 7,946,955,000 7,798,584,000 7,713,391,000 7,458,190,000 6,959,999,000 6,689,687,000 6,373,775,000 6,205,018,000 6,234,751,000 6,007,527,000 5,926,090,000 6,070,451,000 6,070,543,000 6,003,146,000 5,959,846,000 5,859,332,000 5,800,512,000 5,750,889,000 5,636,768,000 5,575,949,000 5,454,778,000 5,441,519,000 5,355,189,000 5,327,167,000 5,154,048,000 5,012,423,000 4,823,683,000 4,813,330,000 4,752,257,000 4,045,756,000 4,027,411,000 4,013,244,000 3,494,801,000    
        liabilities
                                                                                          
        liabilities for estimated costs in excess of estimated receipts during liquidation
      50,996,000 100,019,000                                                                                   
        accounts payable and accrued expenses
      166,000 10,908,000                           42,007,000 69,220,000 63,506,000 75,800,000 62,518,000 95,395,000 87,003,000 117,363,000 120,888,000 123,587,000 121,697,000 128,590,000 149,009,000 162,204,000 163,075,000 138,412,000 136,482,000 169,498,000 165,449,000 155,993,000 143,192,000 158,044,000 140,172,000 148,525,000 137,357,000 113,761,000 108,792,000 110,885,000 91,407,000 99,214,000 101,886,000 96,597,000 101,723,000 96,358,000 81,040,000 89,441,000 88,122,000 87,111,000 71,279,000 93,734,000 75,796,000 79,729,000 67,078,000 80,125,000 64,993,000 73,137,000 43,494,000 67,716,000 67,512,000 62,545,000 54,421,000 60,541,000 45,261,000 43,676,000 36,587,000 38,402,000 
        distributions payable
       3,842,000 2,803,000 3,663,000 3,359,000 5,640,000 6,390,000 6,868,000 7,795,000 2,863,000 113,584,000 1,276,000 514,000 2,365,000 2,954,000 2,850,000 5,072,000 10,991,000 438,105,000 5,791,000 5,791,000 7,534,000 435,583,000    309,238,000                6,981,000                                          
        total liabilities
      51,162,000 114,769,000 27,948,000 25,954,000 26,358,000 34,928,000 31,550,000 30,016,000 30,252,000 31,153,000 137,925,000 22,658,000 19,751,000 26,113,000 32,769,000 24,432,000 29,058,000 34,507,000 465,668,000 59,414,000 59,443,000 73,505,000 503,230,000 66,548,000 322,376,000 346,774,000 644,217,000 334,565,000 735,827,000 936,450,000 935,590,000 1,204,655,000 1,232,231,000 1,265,628,000 1,676,727,000 1,713,137,000 1,715,778,000 1,875,885,000 1,997,035,000 2,160,816,000 2,423,118,000 2,442,056,000 2,681,793,000 3,222,472,000 3,241,644,000 3,400,954,000 3,947,061,000 3,955,938,000 4,446,831,000 4,116,458,000 3,990,361,000 3,865,893,000 3,571,825,000 3,549,902,000 3,059,930,000 3,096,495,000 3,084,814,000 3,044,362,000 2,996,131,000 3,160,699,000 3,152,435,000 3,124,668,000 3,089,567,000 2,956,449,000 2,861,976,000 2,789,191,000 2,657,591,000 2,625,181,000 2,812,897,000 2,778,266,000 2,671,362,000 2,681,681,000 2,496,698,000 2,465,376,000 2,273,974,000 2,506,136,000 2,438,320,000 1,719,900,000 1,689,700,000 2,001,593,000 1,478,264,000    
        commitments and contingencies
                                                                                          
        net assets in liquidation attributable to equity commonwealth common shareholders
      176,408,000 178,605,000                                                                                   
        net assets in liquidation attributable to noncontrolling interest
      87,000 250,000                                                                                   
        net assets in liquidation
      176,495,000 178,855,000                                                                                   
        real estate properties:
                                                                                          
        land
        22,400,000 44,060,000 44,060,000 44,060,000 44,060,000 44,060,000 44,060,000 44,060,000 44,060,000 44,060,000 44,060,000 44,060,000 44,060,000 44,060,000 44,060,000 44,060,000 44,060,000 44,060,000 44,060,000 85,627,000 85,627,000 85,627,000 110,395,000 135,142,000 137,329,000 146,700,000 146,700,000 191,775,000 216,957,000 232,857,000 269,062,000 286,186,000 293,225,000 328,351,000 372,714,000 389,410,000 413,281,000 456,614,000 705,222,000 714,238,000 740,448,000 748,302,000 747,181,000 740,613,000 1,533,543,000 1,548,225,000 1,531,466,000 1,514,341,000 1,498,146,000 1,445,301,000 1,440,845,000 1,393,691,000 1,238,611,000 1,222,519,000 1,237,842,000 1,224,934,000 1,200,934,000 1,242,053,000 1,210,627,000 1,166,638,000 1,201,683,000 1,189,684,000 1,175,940,000 1,167,702,000 1,148,123,000 1,143,109,000 1,112,035,000 1,112,110,000 1,101,349,000 1,081,635,000 1,062,223,000 1,050,303,000 928,111,000 928,106,000 927,255,000 858,687,000 854,595,000 852,983,000 376,605,000 363,030,000 356,241,000 346,895,000 
        buildings and improvements
        158,152,000 374,095,000 371,550,000 367,827,000 366,908,000 365,247,000 364,155,000 364,063,000 363,782,000 363,990,000 362,464,000 362,042,000 362,391,000 361,592,000 361,107,000 357,650,000 355,877,000 353,665,000 351,880,000 576,494,000 572,714,000 571,342,000 704,142,000 1,004,500,000 1,000,822,000 1,117,446,000 1,100,524,000 1,555,836,000 1,841,230,000 1,961,445,000 2,395,748,000 2,570,704,000 2,642,588,000 3,074,591,000 3,399,909,000 3,497,942,000 3,559,060,000 3,834,855,000 4,994,374,000 5,014,205,000 5,145,916,000 5,146,617,000 5,168,335,000 4,890,457,000 6,446,307,000 6,441,544,000 6,331,605,000 6,127,544,000 5,987,358,000 5,746,893,000 5,446,227,000 5,244,138,000 5,150,677,000 5,003,943,000 5,085,249,000 4,948,914,000 4,768,406,000 5,051,996,000 4,905,129,000 4,770,280,000 5,072,208,000 4,966,610,000 4,873,816,000 4,821,438,000 4,674,941,000 4,619,164,000 4,472,412,000 4,447,106,000 4,333,819,000 4,154,466,000 3,999,891,000 3,861,945,000 3,774,135,000 3,756,963,000 3,667,234,000 3,104,201,000 3,058,575,000 3,038,983,000 2,998,748,000 2,906,076,000 2,842,112,000 2,744,166,000 
        accumulated depreciation
        -69,254,000 -183,867,000 -180,266,000 -180,535,000 -178,201,000 -174,399,000 -171,379,000 -169,530,000 -166,379,000 -163,451,000 -159,755,000 -156,439,000 -154,230,000 -150,754,000 -147,034,000 -143,319,000 -142,053,000 -139,061,000 -136,836,000 -202,700,000 -197,847,000 -193,166,000 -245,528,000 -375,968,000 -370,854,000 -387,888,000 -379,862,000 -450,718,000 -554,411,000 -561,003,000 -705,000,000 -755,255,000 -751,882,000 -828,786,000 -880,678,000 -898,939,000 -884,183,000 -913,303,000 -1,066,369,000 -1,030,445,000 -988,323,000                                          
        assets held for sale
        86,803,000                  55,941,000        38,882,000   348,203,000                                                     
        rents receivable
        8,046,000 17,257,000 16,593,000 15,737,000 15,174,000 16,151,000 15,606,000 16,009,000 16,234,000 15,960,000 15,644,000 15,549,000 15,473,000 15,310,000 14,629,000 14,702,000 14,486,000 13,968,000 14,964,000 19,554,000 19,347,000 19,735,000 31,151,000                                                     96,152,000 93,120,000 83,973,000 76,898,000 73,605,000 65,192,000 63,105,000 
        other assets
        9,833,000 16,373,000 16,915,000 17,417,000 18,057,000 17,737,000 18,194,000 18,061,000 18,469,000 16,418,000 15,676,000 15,173,000 15,345,000 20,272,000 16,862,000 17,353,000 18,164,000 18,645,000 22,525,000 39,757,000 41,271,000 35,683,000 42,326,000 62,031,000 63,858,000 76,512,000 78,986,000 87,563,000 100,213,000 99,309,000 126,698,000 122,922,000 123,699,000 140,215,000 152,678,000 157,549,000 162,614,000 159,845,000 211,682,000 220,480,000 209,005,000 206,204,000 206,967,000 195,330,000 225,185,000 221,790,000 245,812,000 228,562,000 210,166,000 182,259,000 224,837,000 210,975,000 153,626,000 115,235,000 135,572,000 123,614,000 123,919,000 127,784,000 125,357,000 100,593,000 125,627,000 124,709,000 130,212,000 106,284,000 135,537,000 102,273,000 120,659,000 95,566,000 104,181,000 101,012,000 96,482,000 82,018,000 93,398,000 68,083,000 77,160,000 75,368,000 64,110,000 50,440,000 54,718,000 61,159,000 59,269,000 50,836,000 
        liabilities and equity
                                                                                          
        liabilities related to properties held for sale
        6,200,000                  81,000        1,153,000 1,840,000  2,019,000 1,013,000  667,000 1,687,000 169,000  1,909,000 20,336,000     23,066,000 30,322,000 1,588,000 1,994,000    463,000 379,000                                
        accounts payable, accrued expenses and other
        17,621,000 19,585,000 20,833,000 27,298,000 23,027,000 20,016,000 19,642,000 25,935,000 21,704,000 18,619,000 15,505,000 19,762,000 27,391,000 19,209,000 21,007,000 20,588,000 25,702,000 25,821,000 25,966,000 37,153,000 38,218,000 36,903,000 42,280,000 62,368,000 46,896,000 44,380,000                                                         
        rent collected in advance
        1,324,000 2,706,000 2,166,000 1,990,000 2,133,000 3,132,000 2,815,000 2,355,000 2,637,000 2,763,000 3,732,000 3,986,000 2,424,000 2,373,000 2,979,000 2,928,000 1,861,000 2,521,000 2,118,000 3,127,000 3,533,000 3,554,000 5,119,000 9,451,000 8,182,000 10,173,000 9,225,000 11,076,000 14,355,000 19,095,000 18,485,000 18,460,000 21,529,000 24,615,000 23,588,000 27,340,000 29,744,000 21,860,000 30,719,000 31,359,000 26,197,000 29,266,000 29,618,000 29,220,000 29,260,000 34,703,000 25,883,000 32,163,000 33,872,000 35,593,000 31,579,000 29,293,000 32,418,000 30,150,000 33,949,000 29,405,000 27,486,000 31,486,000 25,513,000 22,628,000 25,507,000 24,779,000 20,124,000 22,736,000 22,932,000 19,592,000 20,211,000 20,534,000 23,114,000 17,858,000 20,060,000 18,048,000 15,885,000 15,208,000 16,625,000 13,253,000 16,623,000 13,135,000 12,299,000 14,184,000 10,121,000  
        shareholders’ equity:
                                                                                          
        preferred shares of beneficial interest, 0.01 par value: 50,000,000 shares authorized;
                                                                                          
        series d preferred shares; 6.50% cumulative convertible; 4,915,196 shares issued and outstanding, aggregate liquidation preference of 122,880
        119,263,000 119,263,000 119,263,000 119,263,000 119,263,000 119,263,000 119,263,000 119,263,000 119,263,000 119,263,000 119,263,000 119,263,000 119,263,000 119,263,000 119,263,000 119,263,000 119,263,000 119,263,000 119,263,000 119,263,000                                                               
        common shares of beneficial interest, 0.01 par value: 350,000,000 shares authorized; 107,327,691 and 106,847,438 shares issued and outstanding, respectively
        1,073,000 1,073,000                                                                                 
        additional paid in capital
        3,942,389,000 3,939,583,000 3,935,501,000 3,935,873,000 3,930,372,000 3,984,681,000 3,976,643,000 3,979,566,000 4,005,125,000 4,018,440,000 4,053,256,000 4,128,656,000 4,282,106,000 4,297,197,000 4,295,226,000 4,294,632,000 4,291,293,000 4,288,245,000 4,285,266,000 4,313,831,000 4,310,353,000 4,308,049,000 4,304,560,000 4,305,974,000 4,306,020,000 4,300,822,000 4,295,772,000 4,380,313,000 4,378,184,000 4,372,610,000 4,367,190,000 4,363,177,000 4,402,927,000 4,398,033,000 4,393,409,000 4,414,611,000 4,410,951,000 4,495,244,000 4,491,093,000 4,487,133,000 4,484,552,000 4,483,653,000 4,217,651,000 4,213,472,000 4,212,182,000 4,212,082,000 3,585,964,000 3,590,410,000 3,590,321,000 3,613,828,000 3,349,114,000 3,348,849,000 3,354,771,000 3,165,077,000 3,162,936,000 2,924,166,000 2,923,649,000 2,923,549,000 2,937,962,000 2,923,611,000 2,923,455,000 2,923,455,000  2,798,279,000 2,787,449,000 2,774,461,000 2,774,270,000 2,773,664,000 2,772,245,000 2,779,159,000 2,779,159,000 2,653,791,000 2,653,738,000 2,394,946,000 2,394,946,000 2,394,537,000 2,394,497,000 2,071,203,000  2,065,739,000 1,946,525,000 1,945,753,000 
        cumulative net income
        3,950,345,000 3,976,534,000 3,952,384,000 3,926,979,000 3,900,430,000 3,874,284,000 3,858,500,000 3,835,815,000 3,814,940,000 3,802,750,000 3,799,854,000 3,798,552,000 3,800,186,000 3,802,994,000 3,804,930,000 3,814,948,000 3,816,614,000 3,816,245,000 3,788,413,000 3,363,654,000 3,347,664,000 3,323,778,000 3,081,492,000 2,870,974,000 2,855,557,000 2,822,793,000 2,785,760,000 2,596,259,000 2,617,820,000 2,584,608,000 2,590,417,000 2,566,603,000 2,554,343,000 2,467,955,000 2,380,111,000 2,333,709,000 2,290,564,000 2,260,098,000 2,247,482,000 2,233,852,000 2,392,413,000 2,235,673,000 2,230,288,000 2,215,141,000 2,431,456,000 2,412,567,000 2,539,684,000 2,522,066,000 2,506,001,000 2,467,448,000 2,438,913,000 2,418,949,000 2,350,033,000 2,284,223,000 2,274,225,000 2,247,181,000 2,174,982,000 2,115,366,000 2,008,791,000 1,923,067,000 1,855,015,000 1,827,609,000  1,767,976,000 1,736,502,000 1,703,354,000 1,665,477,000 1,634,123,000 1,602,609,000 1,452,774,000 1,409,068,000 1,370,771,000 1,320,025,000 1,287,790,000 1,245,797,000 1,209,396,000 1,174,336,000 1,124,961,000 1,089,797,000 1,065,178,000 1,037,807,000 1,010,515,000 
        cumulative common distributions
        -4,863,688,000 -4,864,499,000 -4,864,195,000 -4,864,440,000 -4,865,190,000 -4,865,668,000 -4,866,401,000 -4,393,522,000 -4,393,290,000 -4,281,442,000 -4,280,826,000 -4,281,195,000 -4,281,754,000 -4,281,670,000 -4,283,753,000 -4,283,668,000 -4,284,050,000 -3,852,856,000 -3,852,856,000 -3,851,666,000 -3,851,947,000 -3,420,406,000 -3,420,512,000 -3,420,548,000 -3,418,995,000 -3,111,868,000 -3,111,868,000 -3,111,868,000 -3,111,868,000 -3,111,868,000 -3,111,868,000 -3,111,868,000 -3,111,868,000 -3,111,868,000 -3,111,868,000 -3,111,868,000 -3,111,868,000 -3,111,868,000 -3,111,868,000 -3,111,868,000 -3,111,868,000                                          
        cumulative preferred distributions
        -739,667,000 -737,670,000 -735,673,000 -733,676,000 -731,679,000 -729,682,000 -727,685,000 -725,688,000 -723,691,000 -721,694,000 -719,697,000 -717,700,000 -715,703,000 -713,706,000 -711,709,000 -709,712,000 -707,715,000 -705,718,000 -703,721,000 -701,724,000 -699,727,000 -697,730,000 -695,733,000 -693,736,000 -693,736,000 -689,742,000 -687,745,000 -685,748,000 -683,751,000 -681,754,000 -679,757,000 -677,760,000 -675,763,000 -673,766,000 -657,176,000 -650,195,000 -643,214,000 -636,233,000 -629,252,000 -622,271,000 -622,275,000                                          
        total shareholders’ equity
        2,409,715,000 2,434,284,000 2,408,352,000 2,385,067,000 2,354,263,000 2,383,975,000 2,361,417,000 2,816,528,000 2,823,453,000 2,938,429,000 2,972,977,000 3,048,728,000 3,205,313,000 3,225,297,000 3,225,176,000 3,236,678,000 3,236,620,000 3,666,394,000 3,637,580,000 3,244,577,000 3,226,825,000 3,634,173,000 3,390,289,000 3,182,801,000 3,168,318,000 3,441,014,000 3,400,290,000 3,299,366,000 3,323,560,000 3,285,335,000 3,285,483,000 3,260,447,000 3,289,040,000 3,198,638,000 3,387,371,000 3,368,487,000 3,327,208,000 3,387,230,000 3,311,178,000  3,489,003,000 3,370,888,000 3,359,070,000 3,421,033,000 4,072,477,000 4,126,730,000 3,500,124,000 3,682,126,000 3,723,030,000 3,592,297,000 3,388,174,000 3,139,785,000 3,313,845,000 3,108,523,000 3,149,937,000 2,963,165,000 2,929,959,000 2,909,752,000 2,918,108,000 2,878,478,000 2,870,279,000 2,902,883,000  2,961,698,000 2,979,177,000 2,950,768,000 2,641,881,000 2,663,253,000 2,683,827,000 2,645,486,000 2,657,350,000 2,547,047,000 2,549,709,000 2,307,194,000 2,313,937,000 2,325,856,000 2,337,711,000 2,011,651,000 2,016,537,000 2,026,508,000 1,917,073,000 1,926,273,000 
        noncontrolling interest
        3,467,000 3,503,000 4,976,000 5,046,000 7,973,000 7,852,000 7,655,000 7,204,000 7,142,000 7,393,000 7,290,000 6,542,000 6,521,000 6,539,000 6,442,000 6,486,000 6,486,000 7,347,000 7,034,000 1,295,000 1,288,000 1,450,000 1,272,000 1,197,000 1,193,000 1,295,000 1,189,000 1,129,000 1,139,000 1,126,000 1,042,000                210,854,000 210,085,000 205,606,000                                  
        total equity
        2,413,182,000 2,437,787,000 2,413,328,000 2,390,113,000 2,362,236,000 2,391,827,000 2,369,072,000 2,823,732,000 2,830,595,000 2,945,822,000 2,980,267,000 3,055,270,000 3,211,834,000 3,231,836,000 3,231,618,000 3,243,164,000 3,243,106,000 3,673,741,000 3,644,614,000 3,245,872,000 3,228,113,000 3,635,623,000 3,391,561,000 3,183,998,000 3,169,511,000 3,442,309,000 3,401,479,000 3,300,495,000 3,324,699,000 3,286,461,000 3,286,525,000                                                    
        total liabilities and equity
        2,441,130,000 2,463,741,000 2,439,686,000 2,425,041,000 2,393,786,000 2,421,843,000 2,399,324,000 2,854,885,000 2,968,520,000 2,968,480,000 3,000,018,000 3,081,383,000 3,244,603,000 3,256,268,000 3,260,676,000 3,277,671,000 3,708,774,000 3,733,155,000 3,704,057,000 3,319,377,000 3,731,343,000 3,702,171,000 3,713,937,000 3,530,772,000 3,813,728,000 3,776,874,000 4,137,306,000 4,236,945,000 4,260,289,000 4,491,116,000 4,518,756,000                                                    
        common shares of beneficial interest, 0.01 par value: 350,000,000 shares authorized; 107,223,284 and 106,847,438 shares issued and outstanding, respectively
          1,072,000                                                                                
        common shares of beneficial interest, 0.01 par value: 350,000,000 shares authorized; 106,847,438 and 109,428,252 shares issued and outstanding, respectively
           1,068,000                                                                               
        common shares of beneficial interest, 0.01 par value: 350,000,000 shares authorized; 106,712,046 and 109,428,252 shares issued and outstanding, respectively
            1,067,000                                                                              
        common shares of beneficial interest, 0.01 par value: 350,000,000 shares authorized; 109,730,457 and 109,428,252 shares issued and outstanding, respectively
             1,097,000                                                                             
        common shares of beneficial interest, 0.01 par value: 350,000,000 shares authorized; 109,701,592 and 109,428,252 shares issued and outstanding, respectively
              1,097,000                                                                            
        common shares of beneficial interest, 0.01 par value: 350,000,000 shares authorized; 109,428,252 and 115,205,818 shares issued and outstanding, respectively
               1,094,000                                                                           
        common shares of beneficial interest, 0.01 par value: 350,000,000 shares authorized; 110,651,571 and 115,205,818 shares issued and outstanding, respectively
                1,106,000                                                                          
        common shares of beneficial interest, 0.01 par value: 350,000,000 shares authorized; 111,241,842 and 115,205,818 shares issued and outstanding, respectively
                 1,112,000                                                                         
        common shares of beneficial interest, 0.01 par value: 350,000,000 shares authorized; 112,670,401 and 115,205,818 shares issued and outstanding, respectively
                  1,127,000                                                                        
        common shares of beneficial interest, 0.01 par value: 350,000,000 shares authorized; 115,205,818 and 121,522,555 shares issued and outstanding, respectively
                   1,152,000                                                                       
        common shares of beneficial interest, 0.01 par value: 350,000,000 shares authorized; 121,511,102 and 121,522,555 shares issued and outstanding, respectively
                    1,215,000                                                                      
        common shares of beneficial interest, 0.01 par value: 350,000,000 shares authorized; 121,940,355 and 121,522,555 shares issued and outstanding, respectively
                     1,219,000                                                                     
        common shares of beneficial interest, 0.01 par value: 350,000,000 shares authorized; 121,916,875 and 121,522,555 shares issued and outstanding, respectively
                      1,219,000                                                                    
        restricted cash
                         4,103,000 3,174,000 5,003,000 4,456,000 2,310,000 1,767,000 3,298,000 9,708,000 8,419,000 6,995,000 8,897,000 7,657,000 6,594,000 6,155,000 6,532,000 36,755,000 33,777,000 36,190,000 32,245,000 28,463,000 31,351,000 33,349,000 17,715,000 15,554,000 22,829,000 17,441,000 17,443,000 18,009,000 14,723,000 13,631,000 14,329,000 17,195,000 10,102,000 5,109,000 5,530,000 7,075,000 12,474,000 10,490,000 11,638,000 8,993,000 9,880,000 79,944,000 94,105,000 11,543,000 18,027,000 17,410,000 16,571,000 14,235,000 21,635,000 22,775,000 15,931,000 13,316,000 18,348,000 17,095,000 22,282,000 19,838,000 22,257,000 20,653,000 8,608,000 7,086,000 9,163,000 8,604,000 6,616,000 3,632,000 9,415,000 
        mortgage note payable
                                                                                          
        common shares of beneficial interest, 0.01 par value: 350,000,000 shares authorized; 121,522,555 and 121,924,199 shares issued and outstanding, respectively
                       1,215,000                                                                   
        mortgage notes payable
                         25,281,000 25,487,000 25,691,000 25,896,000 26,091,000 26,288,000 26,482,000 31,643,000 31,964,000 32,281,000 32,594,000 34,999,000 35,401,000 77,178,000 77,717,000 243,993,000 244,850,000 245,691,000 249,732,000 367,713,000 513,561,000 606,423,000 609,249,000 619,760,000 895,231,000 898,804,000 925,120,000 977,044,000 980,985,000 869,384,000 801,709,000 784,454,000 633,935,000 380,597,000 350,462,000 352,575,000 620,137,000 622,127,000 442,071,000 443,908,000 445,705,000 387,090,000 380,116,000 363,555,000 394,376,000 397,435,000 410,892,000 413,836,000 416,058,000 388,743,000 390,495,000 379,959,000 374,165,000 347,088,000 434,346,000 437,667,000 440,407,000 438,085,000 325,976,000 327,582,000 328,510,000 333,222,000 333,848,000 335,055,000 335,797,000 
        common shares of beneficial interest, 0.01 par value: 350,000,000 shares authorized; 121,524,510 and 121,924,199 shares issued and outstanding, respectively
                        1,215,000                                                                  
        common shares of beneficial interest, 0.01 par value: 350,000,000 shares authorized; 121,521,624 and 121,924,199 shares issued and outstanding, respectively
                         1,215,000                                                                 
        common shares of beneficial interest, 0.01 par value: 350,000,000 shares authorized; 121,502,520 and 121,924,199 shares issued and outstanding, respectively
                          1,215,000                                                                
        marketable securities
                               249,602,000 248,838,000 248,275,000 247,879,000 276,928,000 279,626,000 278,072,000 275,597,000                                                    
        senior unsecured debt
                              248,689,000 248,473,000 248,258,000 248,048,000 646,246,000 815,984,000 815,577,000 1,064,954,000 1,064,450,000 1,063,950,000 1,313,267,000 1,312,707,000 1,312,148,000 1,460,592,000 1,460,360,000 1,460,131,000 1,598,652,000 1,598,416,000 1,823,182,000 1,856,373,000 1,856,135,000 1,954,701,000 2,304,465,000 2,304,229,000 3,029,652,000 2,695,152,000 2,694,780,000 2,687,600,000 2,687,172,000 2,686,745,000 2,474,116,000 2,259,137,000 2,258,801,000 2,133,130,000 2,132,795,000 2,209,804,000 2,240,865,000 2,240,504,000 2,240,144,000 2,239,784,000 2,239,424,000 1,991,241,000 1,941,469,000 1,941,173,000 1,940,878,000 1,940,582,000 1,940,287,000 1,889,991,000 1,640,455,000 1,640,178,000 1,639,901,000 1,739,624,000         
        common shares of beneficial interest, 0.01 par value: 350,000,000 shares authorized; 121,924,199 and 121,572,155 shares issued and outstanding, respectively
                           1,219,000 1,219,000                                                              
        cumulative other comprehensive loss
                               -342,000 -1,006,000 -1,469,000 -2,106,000 -95,000   -1,002,000 -208,000 -1,117,000 -2,234,000 -3,014,000 -3,687,000 -5,142,000 -5,963,000 -72,228,000 -53,216,000 -39,765,000                                          
        shareholders' equity:
                                                                                          
        series d preferred shares; 6 1/2% cumulative convertible; 4,915,196 shares issued and outstanding, aggregate liquidation preference of 122,880
                            119,263,000 119,263,000 119,263,000 119,263,000 119,263,000 119,263,000 119,263,000 119,263,000 119,263,000 119,263,000 119,263,000  119,263,000 119,263,000 119,263,000                                                
        acquired real estate leases
                             92,000 183,000 275,000 596,000 2,946,000 3,621,000 23,847,000 28,108,000 42,719,000 45,482,000 48,281,000 52,017,000 70,724,000 83,121,000 88,760,000 99,017,000 121,912,000 184,894,000 198,287,000 212,584,000 227,197,000 244,634,000 272,381,000 394,978,000 416,763,000 371,929,000 364,282,000 374,022,000 360,293,000 287,241,000 270,676,000 179,357,000 175,130,000 156,877,000 163,753,000 157,428,000 159,428,000 160,401,000 151,869,000 162,007,000 150,672,000 156,743,000 163,224,000 162,538,000 167,879,000 164,155,000 173,510,000 177,279,000 161,787,000 150,761,000 149,087,000 142,451,000 149,063,000 139,607,000 67,994,000 67,569,000 68,983,000 45,651,000    
        common shares of beneficial interest, 0.01 par value: 350,000,000 shares authorized; 121,922,120 and 121,572,155 shares issued and outstanding, respectively
                             1,219,000                                                             
        common shares of beneficial interest, 0.01 par value: 350,000,000 shares authorized; 121,899,625 and 121,572,155 shares issued and outstanding, respectively
                              1,219,000                                                            
        rents receivable, net of allowance for doubtful accounts of 4,974 and 4,771, respectively
                               51,089,000                                                           
        common shares of beneficial interest, 0.01 par value: 350,000,000 shares authorized; 121,572,155 and 124,217,616 shares issued and outstanding, respectively
                               1,216,000                                                           
        rents receivable, net of allowance for doubtful accounts of 5,816 and 4,771, respectively
                                50,103,000                                                          
        common shares of beneficial interest, 0.01 par value: 350,000,000 shares authorized; 121,482,673 and 124,217,616 shares issued and outstanding, respectively
                                1,215,000 1,215,000                                                         
        rents receivable, net of allowance for doubtful accounts of 5,101 and 4,771, respectively
                                 57,347,000                                                         
        rents receivable, net of allowance for doubtful accounts of 5,137 and 4,771, respectively
                                  55,910,000                                                        
        assumed real estate lease obligations
                                  503,000 1,001,000 1,215,000 1,429,000 1,630,000 1,946,000 2,140,000 2,761,000 3,624,000 4,296,000 4,890,000 5,728,000 24,220,000 26,784,000 28,950,000 31,354,000 33,064,000 38,087,000 62,270,000 66,576,000 70,587,000 69,237,000 72,392,000 72,619,000 69,836,000                                
        security deposits
                                  4,412,000 4,735,000 5,938,000 5,957,000 6,957,000 8,160,000 8,128,000 9,154,000 9,670,000 10,338,000 10,722,000 10,610,000 14,095,000 14,044,000 13,648,000 13,852,000 13,682,000 12,442,000 24,031,000 23,822,000 24,191,000 24,489,000 24,024,000 23,710,000 23,284,000 22,726,000 22,903,000 22,090,000 23,008,000 21,404,000 21,375,000 17,722,000 17,644,000 12,597,000 16,724,000 16,063,000 16,031,000 16,076,000 15,870,000 15,972,000 15,154,000 15,081,000 14,577,000 13,679,000 13,536,000 12,718,000 12,033,000 11,920,000 11,510,000 9,724,000 9,602,000 9,520,000 9,299,000 8,591,000 8,819,000 8,444,000 
        common shares of beneficial interest, 0.01 par value: 350,000,000 shares authorized; 121,457,073 and 124,217,616 shares issued and outstanding, respectively
                                  1,214,000                                                        
        properties held for sale
                                   97,688,000   64,396,000  13,463,000 150,766,000 20,347,000  112,150,000 360,781,000     214,677,000 678,250,000 128,529,000 159,501,000    43,573,000 51,127,000 51,249,000 8,297,000 160,459,000 8,290,000 11,178,000 105,234,000 135,760,000 219,666,000 311,665,000       2,725,000 10,709,000 10,726,000              
        rents receivable, net of allowance for doubtful accounts of 4,771 and 5,105, respectively
                                   93,436,000                                                       
        common shares of beneficial interest, 0.01 par value: 350,000,000 shares authorized; 124,217,616 and 123,994,465 shares issued and outstanding, respectively
                                   1,242,000                                                       
        rents receivable, net of allowance for doubtful accounts of 4,217 and 5,105, respectively
                                    107,832,000                                                      
        common shares of beneficial interest, 0.01 par value: 350,000,000 shares authorized; 124,089,443 and 123,994,465 shares issued and outstanding, respectively
                                    1,241,000 1,241,000                                                     
        cumulative other comprehensive income
                                    2,671,000 1,235,000                2,577,000     18,363,000 11,098,000                               
        rents receivable, net of allowance for doubtful accounts of 4,352 and 5,105, respectively
                                     115,371,000                                                     
        rents receivable, net of allowance for doubtful accounts of 4,593 and 5,105, respectively
                                      152,081,000                                                    
        common shares of beneficial interest, 0.01 par value: 350,000,000 shares authorized; 124,064,195 and 123,994,465 shares issued and outstanding, respectively
                                      1,240,000                                                    
        rents receivable, net of allowance for doubtful accounts of 5,105 and 7,715, respectively
                                       152,031,000                                                   
        liabilities and shareholders’ equity
                                                                                          
        series d preferred shares; 6 1/2% cumulative convertible; 4,915,196 shares issued and outstanding, respectively, aggregate liquidation preference of 122,880
                                       119,263,000                                                   
        series e preferred shares; 7 1/4% cumulative redeemable on or after may 15, 2016; 0 and 11,000,000 shares issued and outstanding, respectively, aggregate liquidation preference 0 and 275,000, respectively
                                                                                          
        common shares of beneficial interest, 0.01 par value: 350,000,000 shares authorized; 123,994,465 and 126,349,914 shares issued and outstanding, respectively
                                       1,240,000                                                   
        total liabilities and shareholders’ equity
                                       4,526,075,000 4,965,767,000 4,911,775,000 5,103,149,000 5,244,372,000 5,324,243,000 5,548,046,000 5,734,296,000  6,170,796,000 6,593,360,000 6,600,714,000 6,821,987,000 8,019,538,000 8,082,668,000 7,946,955,000 7,798,584,000 7,713,391,000 7,458,190,000 6,959,999,000 6,689,687,000 6,373,775,000 6,205,018,000 6,234,751,000 6,007,527,000 5,926,090,000 6,070,451,000 6,070,543,000 6,003,146,000 5,959,846,000 5,859,332,000  5,750,889,000 5,636,768,000 5,575,949,000 5,454,778,000 5,441,519,000 5,355,189,000 5,327,167,000 5,154,048,000 5,012,423,000 4,823,683,000 4,813,330,000 4,752,257,000 4,045,756,000 4,027,411,000 4,013,244,000 3,494,801,000    
        rents receivable, net of allowance for doubtful accounts of 4,515 and 7,715, respectively
                                        150,728,000                                                  
        common shares of beneficial interest, 0.01 par value: 350,000,000 shares authorized; 125,532,523 and 126,349,914 shares issued and outstanding, respectively
                                        1,255,000                                                  
        rents receivable, net of allowance for doubtful accounts of 4,431 and 7,715, respectively
                                         169,800,000                                                 
        common shares of beneficial interest, 0.01 par value: 350,000,000 shares authorized; 125,533,376 and 126,349,914 shares issued and outstanding, respectively
                                         1,255,000                                                 
        rents receivable, net of allowance for doubtful accounts of 4,193 and 7,715, respectively
                                          176,740,000                                                
        series e preferred shares; 7 1/4% cumulative redeemable on or after may 15, 2016; 11,000,000 shares issued and outstanding, aggregate liquidation preference 275,000
                                          265,391,000 265,391,000 265,391,000 265,391,000 265,391,000 265,391,000 265,391,000 265,391,000 265,391,000 265,391,000 265,391,000 265,391,000 265,391,000 265,391,000                                   
        common shares of beneficial interest, 0.01 par value: 350,000,000 shares authorized; 125,502,748 and 126,349,914 shares issued and outstanding, respectively
                                          1,255,000                                                
        rents receivable, net of allowance for doubtful accounts of 7,715 and 6,565, respectively
                                           174,676,000                                               
        series d preferred shares; 6 1/2% cumulative convertible; 4,915,196 and 4,915,497 shares issued and outstanding, respectively, aggregate liquidation preference of 122,880 and 122,887, respectively
                                           119,263,000 119,263,000 119,263,000 119,263,000                                            
        common shares of beneficial interest, 0.01 par value: 350,000,000 shares authorized; 126,349,914 and 129,607,279 shares issued and outstanding, respectively
                                           1,263,000 1,263,000                                              
        rents receivable, net of allowance for doubtful accounts of 9,281 and 6,565, respectively
                                            184,679,000                                              
        rents receivable, net of allowance for doubtful accounts of 10,008 and 6,565, respectively
                                             209,089,000                                             
        common shares of beneficial interest, 0.01 par value: 350,000,000 shares authorized; 129,760,214 and 129,607,279 shares issued and outstanding, respectively
                                             1,298,000                                             
        rents receivable, net of allowance for doubtful accounts of 8,110 and 6,565, respectively
                                              249,408,000                                            
        common shares of beneficial interest, 0.01 par value: 350,000,000 shares authorized; 129,733,742 and 129,607,279 shares issued and outstanding, respectively
                                              1,297,000                                            
        equity investments
                                                 531,862,000 518,934,000 517,254,000 11,407,000 11,394,000 178,996,000 180,237,000 176,255,000 178,652,000 168,871,000 170,100,000 173,721,000 166,626,000 173,619,000 161,045,000 158,053,000                  218,174,000 220,445,000 222,589,000 260,208,000 255,361,000 258,326,000 261,524,000 264,087,000 
        rents receivable, net of allowance for doubtful accounts of 6,565 and 7,885, respectively
                                               248,101,000                                           
        liabilities and shareholders' equity
                                                                                          
        revolving credit facility
                                                 235,000,000 235,000,000 235,000,000 135,000,000 135,000,000 160,000,000   235,000,000 230,000,000 270,000,000    241,000,000 201,000,000 297,000,000 303,000,000 301,000,000 308,000,000 140,000,000 38,000,000 212,000,000 144,000,000 40,000,000 310,000,000 280,000,000 193,000,000 256,000,000 346,000,000 236,000,000 80,000,000 175,000,000 95,000,000 27,000,000  412,000,000 160,000,000    
        due to related persons
                                                 22,984,000 15,793,000 6,564,000 12,954,000 14,636,000 31,942,000 14,664,000 13,667,000 28,448,000                                 
        shareholders' equity attributable to equity commonwealth:
                                                                                          
        preferred shares of beneficial interest, 0.01 par value...
                                                                                          
        series d preferred shares; 6 1/2% cumulative convertible; 4,915,497 and 15,180,000 shares issued and outstanding, respectively, aggregate liquidation preference of 122,887 and 379,500, respectively
                                               119,266,000 119,266,000                                          
        common shares of beneficial interest, 0.01 par value: 350,000,000 shares authorized; 129,607,279 and 118,386,918 shares issued and outstanding, respectively
                                               1,296,000                                           
        total shareholders' equity
                                               3,319,583,000                                           
        total liabilities and shareholders' equity
                                               5,761,639,000                                           
        rents receivable, net of allowance for doubtful accounts of 7,013 and 7,885, respectively
                                                238,207,000                                          
        common shares of beneficial interest, 0.01 par value: 350,000,000 shares authorized; 128,893,552 and 118,386,918 shares issued and outstanding, respectively
                                                1,289,000                                          
        rents receivable, net of allowance for doubtful accounts of 7,451 and 7,885, respectively
                                                 238,033,000                                         
        series d preferred shares; 6 1/2% cumulative convertible; 4,916,997 and 15,180,000 shares issued and outstanding, respectively, aggregate liquidation preference of 122,925 and 379,500, respectively
                                                 119,286,000                                         
        common shares of beneficial interest, 0.01 par value: 350,000,000 shares authorized; 128,859,923 and 118,386,918 shares issued and outstanding, respectively
                                                 1,289,000                                         
        rents receivable, net of allowance for doubtful accounts of 7,462 and 7,885, respectively
                                                  239,766,000                                        
        series d preferred shares; 6 1/2% cumulative convertible; 15,180,000 shares issued and outstanding, aggregate liquidation preference 379,500
                                                  368,270,000 368,270,000 368,270,000 368,270,000 368,270,000 368,270,000 368,270,000 368,270,000 368,270,000 368,270,000 368,270,000 368,270,000 368,270,000 368,270,000 368,270,000 368,270,000 368,270,000 368,270,000 368,270,000 368,270,000  368,270,000 368,270,000                  
        common shares of beneficial interest, 0.01 par value: 350,000,000 shares authorized; 118,413,730 and 118,386,918 shares issued and outstanding, respectively
                                                  1,184,000                                        
        rents receivable, net of allowance for doubtful accounts of 7,750 and 9,962, respectively
                                                   218,301,000                                       
        sir revolving credit facility
                                                    235,000,000 238,000,000 92,000,000 321,000,000 227,000,000                                  
        shareholders’ equity attributable to commonwealth reit:
                                                                                          
        common shares of beneficial interest, 0.01 par value: 350,000,000 shares authorized; 118,387,518 and 83,804,068 shares issued and outstanding, respectively
                                                   1,184,000                                       
        total shareholders’ equity attributable to commonwealth reit
                                                   3,421,033,000 3,671,141,000 3,728,032,000 3,289,270,000 3,472,041,000 3,517,424,000                                  
        noncontrolling interest in consolidated subsidiary
                                                    401,336,000 398,698,000                                     
        rents receivable, net of allowance for doubtful accounts of 8,769 and 9,962, respectively
                                                    274,988,000                                      
        common shares of beneficial interest, 0.01 par value: 350,000,000 shares authorized; 118,314,068 and 83,804,068 shares issued and outstanding, respectively
                                                    1,183,000                                      
        rents receivable, net of allowance for doubtful accounts of 9,962
                                                     267,733,000                                     
        preferred shares of beneficial interest, 0.01 par value:
                                                                                          
        50,000,000 shares authorized;
                                                                                          
        common shares of beneficial interest, 0.01 par value:
                                                                                          
        350,000,000 shares authorized; 118,304,068 and 83,804,068 shares issued and outstanding, respectively
                                                     1,183,000                                     
        rents receivable, net of allowance for doubtful accounts of 11,798 and 12,575, respectively
                                                      246,313,000                                    
        series c preferred shares; 7 1/8% cumulative redeemable since february 15, 2011; zero and 6,000,000 shares issued and outstanding, respectively, aggregate liquidation preference 150,000
                                                                                          
        350,000,000 shares authorized; 83,804,068 and 83,721,736 shares issued and outstanding, respectively
                                                      838,000                                    
        rents receivable, net of allowance for doubtful accounts of 12,427 and 12,575, respectively
                                                       236,001,000                                   
        series c preferred shares; 7 1/8% cumulative redeemable since february 15, 2011; 6,000,000 shares issued and outstanding, aggregate liquidation preference 150,000
                                                       145,015,000 145,015,000 145,015,000                                 
        350,000,000 shares authorized; 83,730,451 and 83,721,736 shares issued and outstanding, respectively
                                                       837,000                                   
        rents receivable, net of allowance for doubtful accounts of 11,835 and 12,575, respectively
                                                        226,565,000                                  
        series e preferred shares; 7 1/4% cumulative redeemable on or after may 15, 2016; 11,000,000 issued and outstanding, aggregate liquidation preference 275,000
                                                        265,391,000                                  
        350,000,000 shares authorized; 83,721,736 shares issued and outstanding
                                                        837,000                                  
        rents receivable, net of allowance for doubtful accounts of 12,421 and 12,550, respectively
                                                         212,737,000                                 
        series e preferred shares; 7 1/4% cumulative redeemable on or after may 15, 2016; 11,000,000 and zero shares issued and outstanding, respectively, aggregate liquidation preference 275,000
                                                         265,391,000                                 
        350,000,000 shares authorized; 83,721,736 and 72,138,686 shares issued and outstanding, respectively
                                                         837,000                                 
        rents receivable, net of allowance for doubtful accounts of 12,316 and 12,550, respectively
                                                          203,304,000                                
        due to affiliates
                                                          11,621,000 11,488,000 25,602,000 9,096,000 10,288,000 28,717,000 17,705,000 13,357,000 22,453,000 12,819,000 11,329,000 10,399,000 23,228,000 8,193,000 7,448,000 12,708,000 19,643,000 7,545,000 9,636,000 10,876,000 25,813,000 11,454,000 6,566,000 16,418,000 30,820,000 6,255,000 5,882,000 8,370,000 14,667,000 9,742,000 9,804,000 6,309,000 
        series c preferred shares; 7 1/8% cumulative redeemable at par on or after february 15, 2011; 6,000,000 shares issued and outstanding, aggregate liquidation preference 150,000
                                                          145,015,000 145,015,000 145,015,000 145,015,000 145,015,000 145,015,000 145,015,000 145,015,000 145,015,000 145,015,000 145,015,000 145,015,000  145,015,000                   
        series e preferred shares; 7 1/4% cumulative redeemable at par on or after may 15, 2016; 11,000,000 and zero shares issued and outstanding, respectively, aggregate liquidation preference 275,000
                                                          265,804,000                                
        350,000,000 shares authorized; 72,148,686 and 72,138,686 shares issued and outstanding, respectively
                                                          721,000                                
        rents receivable, net of allowance for doubtful accounts of 12,175 and 12,550, respectively
                                                           205,691,000                               
        other liabilities related to properties held for sale
                                                           297,000 11,000 451,000 8,000 23,000 2,987,000 3,451,000 3,809,000                        
        acquired real estate lease obligations
                                                           65,130,000 43,513,000 44,549,000 45,226,000 49,398,000 46,989,000 45,577,000 50,338,000 42,375,000 43,268,000 41,607,000 39,612,000 40,942,000 40,757,000 41,833,000 42,472,000 44,300,000 43,711,000 38,987,000 38,753,000 39,495,000 38,428,000 39,843,000 39,423,000 31,469,000 32,096,000 33,206,000 16,835,000    
        350,000,000 shares authorized; 72,138,686 shares issued and outstanding
                                                           721,000                               
        rents receivable, net of allowance for doubtful accounts of 12,415 and 10,945, respectively
                                                            198,899,000                              
        series b preferred shares; 8 3/4% cumulative redeemable at par on or after september 12, 2007; 7,000,000 shares issued and outstanding, aggregate liquidation preference 175,000
                                                            169,079,000 169,079,000 169,079,000 169,079,000 169,079,000 169,079,000 169,079,000 169,079,000 169,079,000                      
        350,000,000 shares authorized; 72,138,686 and 55,965,061 shares issued and outstanding, respectively
                                                            721,000                              
        rents receivable, net of allowance for doubtful accounts of 11,779 and 10,945, respectively
                                                             196,781,000                             
        350,000,000 shares authorized; 64,596,310 and 55,965,060 shares issued and outstanding, respectively
                                                             646,000                             
        accumulated other comprehensive income
                                                                                          
        rents receivable, net of allowance for doubtful accounts of 11,539 and 10,945, respectively
                                                              203,044,000                            
        350,000,000 shares authorized; 258,360,241 and 223,860,241 shares issued and outstanding, respectively
                                                              2,584,000                            
        rents receivable, net of allowance for doubtful accounts of 10,910 and 8,492, respectively
                                                               187,495,000                           
        350,000,000 shares authorized; 223,860,241 and 227,731,938 shares issued and outstanding, respectively
                                                               2,239,000                           
        rents receivable, net of allowance for doubtful accounts of 8,351 and 8,492, respectively
                                                                188,512,000                          
        350,000,000 shares authorized; 223,708,241 and 227,731,938 shares issued and outstanding, respectively
                                                                2,237,000                          
        rents receivable, net of allowance for doubtful accounts of 8,305 and 8,492, respectively
                                                                 203,034,000                         
        350,000,000 shares authorized; 223,683,241 and 227,731,938 shares issued and outstanding, respectively
                                                                 2,237,000                         
        rents receivable, net of allowance for doubtful accounts of 8,494 and 6,290, respectively
                                                                  181,998,000                        
        350,000,000 shares authorized; 227,695,938 and 225,444,497 shares issued and outstanding, respectively
                                                                  2,277,000                        
        rents receivable, net of allowance for doubtful accounts of 8,082 and 6,290, respectively
                                                                   174,677,000                       
        mortgage notes payable and other liabilities related to properties held for sale
                                                                   16,271,000                       
        350,000,000 shares authorized; 225,464,497 and 225,444,497 shares issued and outstanding, respectively
                                                                   2,255,000                       
        rents receivable, net of allowance for doubtful accounts of 7,728 and 6,290, respectively
                                                                    202,335,000                      
        350,000,000 shares authorized; 225,444,497 shares issued and outstanding
                                                                    2,254,000                      
        rents receivable, net of allowance for doubtful accounts of 6,290 and 4,737, respectively
                                                                     197,967,000                     
        dividends payable
                                                                         44,111,000                 
        series b preferred shares; 8 3/4% cumulative redeemable at par on or after september 12, 2007; 7,000,000 and 12,000,000 shares issued and outstanding, respectively, aggregate liquidation preference 175,000 and 300,000, respectively
                                                                     169,079,000                     
        350,000,000 shares authorized; 225,444,497 and 210,051,590 shares issued and outstanding, respectively
                                                                     2,254,000                     
        rents receivable, net of allowance for doubtful accounts of 5,810 and 4,737, respectively
                                                                      191,591,000                    
        rents receivable, net of allowance for doubtful accounts of 5,830 and 4,737, respectively
                                                                       182,980,000                   
        series b preferred shares; 8 ¾% cumulative redeemable at par on or after september 12, 2007; 12,000,000 shares issued and outstanding, aggregate liquidation preference 300,000
                                                                       289,849,000                   
        300,000,000 shares authorized; 211,946,590 and 210,051,590 shares issued and outstanding, respectively
                                                                       2,119,000                   
        rents receivable, net of allowance for doubtful accounts of 5,754 and 4,737, respectively
                                                                        181,752,000                  
        series b preferred shares; 8 3/4% cumulative redeemable at par on september 12, 2007; 12,000,000 shares issued and outstanding, aggregate liquidation preference 300,000
                                                                        289,849,000 289,849,000    289,849,000             
        series c preferred shares; 7 1/8% cumulative redeemable at par on february 15, 2011; 6,000,000 shares issued and outstanding, aggregate liquidation preference 150,000
                                                                        145,015,000                  
        common shares of beneficial interest, 0.01 par value: 300,000,000 shares authorized; 211,056,590 and 210,051,590 shares issued and outstanding, respectively
                                                                        2,111,000                  
        rents receivable, net of allowance for doubtful accounts of 4,737 and 3,767, respectively
                                                                         172,566,000                 
        series a preferred shares; 9 7/8% cumulative redeemable at par on february 22, 2006; zero and 8,000,000 shares issued and outstanding, respectively, aggregate liquidation preference 200,000
                                                                                          
        series c preferred shares; 7 1/8% cumulative redeemable at par on february 15, 2011; 6,000,000 and zero shares issued and outstanding, respectively, aggregate liquidation preference 150,000
                                                                         145,015,000 145,015,000  145,015,000              
        series d preferred shares; 6 1/2% cumulative convertible; 15,180,000 and zero shares issued and outstanding, respectively, aggregate liquidation preference 379,500
                                                                         368,270,000                 
        300,000,000 shares authorized; 210,051,590 and 209,860,625 shares issued and outstanding, respectively
                                                                         2,101,000                 
        equity investments in former subsidiaries
                                                                             194,297,000 205,498,000 207,655,000 205,547,000 207,804,000         
        rents receivable, net of allowance for doubtful accounts of 3,696 and 3,767, respectively
                                                                          165,691,000                
        series b preferred shares; 8 ¾% cumulative redeemable at par on september 12, 2007; 12,000,000 shares issued and outstanding, aggregate liquidation preference 300,000
                                                                          289,849,000 289,849,000 289,849,000    289,849,000 289,849,000         
        common shares of beneficial interest, 0.01 par value: 250,000,000 shares authorized; 210,036,590 and 209,860,625 shares issued and outstanding, respectively
                                                                          2,100,000                
        rents receivable, net of allowance for doubtful accounts of 3,862 and 3,767, respectively
                                                                           159,320,000               
        series a preferred shares; 9 7¤8% cumulative redeemable at par on february 22, 2006; zero and 8,000,000 shares issued and outstanding, respectively, aggregate liquidation preference 200,000
                                                                                          
        series c preferred shares; 7 1¤8% cumulative redeemable at par on february 15, 2011; 6,000,000 and zero shares issued and outstanding, respectively, aggregate liquidation preference 150,000
                                                                           145,015,000               
        common shares of beneficial interest, 0.01 par value: 250,000,000 shares authorized; 209,985,540 and 209,860,625 shares issued and outstanding, respectively
                                                                           2,100,000               
        rents receivable, net of allowance for doubtful accounts of 3,910 and 3,767, respectively
                                                                            158,022,000              
        common shares of beneficial interest, 0.01 par value: 250,000,000 shares authorized; 209,860,625 shares issued and outstanding
                                                                            2,099,000              
        rents receivable, net of allowance for doubtful accounts of 3,767 and 4,594, respectively
                                                                             145,385,000             
        series a preferred shares; 9 7/8% cumulative redeemable at par on february 22, 2006; 8,000,000 shares issued and outstanding, aggregate liquidation preference 200,000
                                                                             193,086,000   193,086,000 193,086,000         
        250,000,000 shares authorized; 209,860,625 and 177,316,525 shares issued and outstanding, respectively
                                                                             2,099,000             
        rents receivable, net of allowance for doubtful accounts of 3,688 and 4,594, respectively
                                                                              134,921,000            
        series a preferred shares; 9 7/8% cumulative, redeemable at par on february 22, 2006; 8,000,000 shares outstanding, aggregate liquidation preference 200,000
                                                                              193,086,000 193,086,000           
        series b preferred shares; 8 ¾% cumulative, redeemable at par on september 12, 2007; 12,000,000 shares outstanding, aggregate liquidation preference 300,000
                                                                              289,849,000 289,849,000           
        common shares of beneficial interest, 0.01 par value: 250,000,000 shares authorized; 209,860,625 and 177,316,525 shares outstanding, respectively
                                                                              2,099,000            
        real estate properties, at cost:
                                                                                          
        rents receivable, net of allowance for doubtful accounts of 3,388 and 4,594, respectively
                                                                               126,621,000           
        225,000,000 shares authorized; 199,821,025 and 177,316,525 shares outstanding, respectively
                                                                               1,998,000           
        rents receivable, net of allowance for doubtful accounts of 4,420 and 4,594, respectively
                                                                                119,465,000          
        common shares of beneficial interest, 0.01 par value: 225,000,000 shares authorized; 199,816,525 and 177,316,525 shares issued and outstanding, respectively
                                                                                1,998,000          
        rents receivable, net of allowance for doubtful accounts of 4,594 and 4,568, respectively
                                                                                 113,504,000         
        common shares of beneficial interest, 0.01 par value: 200,000,000 shares authorized; 177,316,525 and 142,773,925 shares issued and outstanding, respectively
                                                                                 1,773,000         
        rents receivable, net of allowance for doubtful accounts of 3,558 and 4,568, respectively
                                                                                  104,840,000        
        term loan
                                                                                  350,000,000 250,000,000 250,000,000      
        senior notes payable
                                                                                  1,389,345,000 993,678,000 993,494,000 1,136,311,000 886,681,000 886,511,000 951,341,000 843,180,000 
        series a preferred shares; 9 7/8% cumulative redeemable; 8,000,000 shares issued and outstanding, aggregate liquidation preference 200,000
                                                                                  193,086,000 193,086,000       
        series b preferred shares; 8 3/4% cumulative redeemable; 12,000,000 shares issued and outstanding, aggregate liquidation preference 300,000
                                                                                  289,849,000        
        common shares of beneficial interest, 0.01 par value...
                                                                                  1,773,000        
        series b preferred shares; 8 ¾% cumulative redeemable; 12,000,000 shares issued and outstanding, aggregate liquidation preference 300,000
                                                                                   289,849,000       
        common shares of beneficial interest, 0.01 par value: 177,278,425 and 142,773,925 shares issued and outstanding, respectively
                                                                                   1,773,000       
        series a, 8,000,000 shares issued and outstanding
                                                                                    193,086,000 193,086,000 193,086,000 193,086,000 193,086,000 193,086,000 
        series b, 12,000,000 shares issued and outstanding
                                                                                    289,849,000 289,849,000 289,849,000 289,849,000 289,849,000  
        common shares of beneficial interest, 0.01 par value: 177,273,925 and 142,773,925 shares issued and outstanding, respectively
                                                                                    1,773,000      
        preferred shares of beneficial interest, 0.01 par value: 50,000,000 shares authorized:
                                                                                          
        common shares of beneficial interest, 0.01 par value: 200,000,000 shares authorized, 142,773,925 and 128,825,247 shares issued and outstanding, respectively
                                                                                     1,428,000     
        common shares of beneficial interest, 0.01 par value: 142,774,177 and 128,825,247 shares issued and outstanding, respectively
                                                                                      1,428,000    
        additional-paid in capital
                                                                                      2,071,198,000    
        borrowings on revolving credit facility
                                                                                       41,000,000 40,000,000 37,000,000 
        common shares of beneficial interest, 0.01 par value: 175,000,000 shares authorized, 142,169,577 and 128,825,247 shares issued and outstanding, respectively
                                                                                       1,422,000   
        revenues:
                                                                                          
        rental income
                                                                                       121,613,000 120,590,000 413,790,000 
        interest and other income
                                                                                       107,000 43,000 3,176,000 
        total revenues
                                                                                       121,720,000 120,633,000 416,966,000 
        expenses:
                                                                                          
        operating expenses
                                                                                       45,686,000 46,025,000 152,614,000 
        interest
                                                                                       25,062,000 25,079,000 86,360,000 
        depreciation and amortization
                                                                                       20,895,000 20,274,000 68,750,000 
        general and administrative
                                                                                       4,872,000 4,500,000 16,815,000 
        loss on early extinguishment of debt
                                                                                       1,487,000   
        total expenses
                                                                                       98,002,000 97,629,000 324,539,000 
        income before equity in earnings of equity investments
                                                                                       23,718,000 23,004,000  
        equity in earnings of equity investments
                                                                                       3,653,000 4,288,000 19,261,000 
        loss on equity transaction of equity investments
                                                                                          
        net income
                                                                                       27,371,000 27,292,000 106,763,000 
        preferred distributions
                                                                                          
        net income available for common shareholders
                                                                                       15,871,000 15,792,000 79,138,000 
        weighted-average common shares outstanding
                                                                                       130,521,000 128,846,000 128,817,000 
        basic and diluted earnings per common share:
                                                                                          
        common shares of beneficial interest, 0.01 par value: 150,000,000 shares authorized, 128,918,077 and 128,825,247 shares issued and outstanding, respectively
                                                                                        1,289,000  
        early extinguishment of debt
                                                                                        1,751,000  
        less accumulated depreciation
                                                                                         284,548,000 
        deferred rents
                                                                                         10,935,000 
        series b, 12,000,000 and zero shares issued and outstanding, respectively
                                                                                         289,849,000 
        common shares of beneficial interest, 0.01 par value: 150,000,000 shares authorized, 128,825,247 and 128,808,747 shares issued and outstanding, respectively
                                                                                         1,288,000 
        unrealized holding losses on investments
                                                                                          
        reversal of impairment of assets
                                                                                          
        income before equity in earnings of equity investments, gain on sale of properties and extraordinary item
                                                                                         92,427,000 
        loss on equity transactions of equity investments
                                                                                          
        income before gain on sale of properties and extraordinary item
                                                                                         110,267,000 
        gain on sale of properties
                                                                                          
        income before extraordinary item
                                                                                         110,267,000 
        extraordinary item – early extinguishment of debt
                                                                                          
      Cashflow Statements:
      Quarterly
      Annual
        Unit: USD2024-10-31 2024-09-30 2024-06-30 2024-03-31 2023-12-31 2023-09-30 2023-06-30 2023-03-31 2022-12-31 2022-09-30 2022-06-30 2022-03-31 2021-12-31 2021-09-30 2021-06-30 2021-03-31 2020-12-31 2020-09-30 2020-06-30 2020-03-31 2019-12-31 2019-09-30 2019-06-30 2019-03-31 2018-12-31 2018-09-30 2018-06-30 2018-03-31 2017-12-31 2017-09-30 2017-06-30 2017-03-31 2016-12-31 2016-09-30 2016-06-30 2016-03-31 2015-12-31 2015-09-30 2015-06-30 2015-03-31 2014-12-31 2014-09-30 2014-06-30 2014-03-31 2013-09-30 2013-06-30 2013-03-31 2012-06-30 2012-03-31 2011-09-30 2011-06-30 2011-03-31 2010-09-30 2010-06-30 2010-03-31 2009-09-30 2009-06-30 2009-03-31 2008-09-30 2008-06-30 2008-03-31 2007-12-31 2007-09-30 2007-06-30 2007-03-31 2006-12-31 2006-09-30 2006-06-30 2006-03-31 2005-12-31 2005-09-30 2005-06-30 2005-03-31 2004-12-31 2004-09-30 2004-06-30 2004-03-31 2003-12-31 2003-09-30 2003-06-30 2003-03-31 
                                                                                         
          cash flows from operating activities:
                                                                                         
          net income
        8,298,000 -26,227,000 24,186,000 25,458,000 26,626,000 26,232,000 15,836,000 22,751,000 20,928,000 12,221,000 2,903,000 1,305,000 -1,637,000 -2,814,000 -1,940,000 -10,038,000 -1,670,000 370,000 27,886,000 425,507,000 15,996,000 23,896,000 242,377,000 210,597,000 15,422,000 32,777,000 37,047,000 187,662,000 -21,569,000 33,224,000 -5,811,000 23,822,000 12,260,000 86,388,000 87,844,000 46,402,000 43,145,000 30,466,000 12,616,000 13,630,000 -158,561,000 156,740,000 5,385,000 20,448,000 -216,207,000 28,917,000 35,624,000 20,586,000 24,574,000 28,535,000 19,964,000 46,612,000 65,810,000 9,998,000 37,297,000 72,199,000 59,616,000 43,112,000 85,724,000 68,052,000 27,406,000 27,479,000 32,154,000 31,474,000 33,148,000 37,877,000 31,354,000 31,514,000 149,835,000 43,706,000 38,297,000 50,746,000 32,235,000 41,993,000 36,401,000 35,060,000 49,375,000 35,164,000 24,619,000 27,371,000 27,292,000 
          adjustments to reconcile net income to net cash from operating activities:
                                                                                         
          depreciation
        566,000 3,654,000 3,614,000 3,626,000 3,561,000 3,810,000 3,824,000 3,719,000 3,963,000 3,791,000 3,700,000 3,776,000 3,764,000 3,940,000 3,762,000 3,769,000 3,870,000 4,187,000 3,723,000 4,382,000 5,174,000 5,077,000 6,128,000 7,403,000 9,242,000 9,404,000 10,461,000 11,279,000 14,991,000 16,941,000 19,344,000 21,893,000 23,567,000 23,329,000 27,217,000 28,582,000 28,649,000 30,865,000 39,956,000 46,418,000 43,505,000 42,059,000 42,830,000 37,682,000 44,351,000 48,657,000 47,349,000 46,237,000 44,443,000 42,602,000 39,265,000 41,457,000 38,258,000 39,562,000 39,755,000 37,960,000 39,648,000 38,804,000 37,802,000 39,500,000 39,406,000 38,673,000 37,426,000 36,446,000 35,005,000 32,316,000 33,155,000 32,594,000 30,703,000 29,145,000 27,928,000 27,692,000 27,186,000 27,790,000 24,559,000 21,912,000 21,716,000 20,766,000 19,946,000 19,724,000 19,225,000 
          straight-line rental income
        26,000 -77,000 -259,000 -223,000 -538,000 -107,000 273,000 279,000 389,000 -61,000 -100,000 10,000 -130,000 -409,000 -561,000 -307,000                                                                  
          other amortization
        65,000 560,000 568,000 731,000 623,000 626,000 690,000 591,000 671,000 660,000 613,000 636,000 639,000 648,000 670,000 582,000 810,000 950,000 675,000 732,000 863,000 771,000 1,341,000 1,034,000 1,293,000 1,329,000 1,877,000 1,628,000 2,019,000 2,363,000 2,552,000 3,055,000 3,294,000 3,282,000 3,776,000 4,161,000 4,085,000 4,442,000 5,436,000 7,346,000 5,750,000 5,602,000 5,348,000 4,231,000 4,921,000 5,006,000 4,800,000 5,022,000 4,793,000 4,092,000 3,864,000 4,230,000 3,893,000 4,138,000 4,185,000 3,967,000 4,408,000 2,866,000 4,003,000 4,126,000 3,997,000 3,812,000 3,483,000 3,900,000 3,229,000 3,291,000 2,820,000 2,809,000 2,562,000 2,387,000 2,240,000 2,239,000 2,005,000 1,836,000 1,534,000 1,403,000 1,366,000 -4,485,000 7,828,000 1,171,000 1,049,000 
          amortization of right-of-use asset
        25,000 76,000               195,000 193,000 190,000 189,000 187,000 185,000                                                            
          share-based compensation
        1,155,000 2,758,000 2,624,000 2,565,000 2,501,000 2,499,000 7,989,000 2,988,000 2,885,000 2,885,000 2,993,000 3,176,000 2,853,000 2,988,000 2,914,000 6,687,000 3,324,000 3,320,000 3,268,000 3,303,000 3,370,000 3,408,000 3,721,000 3,927,000 4,020,000 5,197,000 5,142,000 5,338,000 5,107,000 5,575,000 5,506,000 5,226,000 4,659,000 4,894,000 4,624,000 4,353,000 3,660,000 3,655,000 4,152,000 3,958,000                                          
          loss on asset impairment
        -976,000                        12,087,000 18,428,000 1,286,000 14,740,000     167,145,000 -122,000   217,080,000 4,589,000 3,946,000                                  
          net gain on sale of properties
                -7,000        -208,000 -26,916,000 -419,620,000 -24,000 -1,945,000 -227,166,000 -193,037,000 1,608,000 -20,877,000 -26,937,000 -205,211,000 29,172,000 -25,080,000 -3,136,000 -16,454,000 -25,676,000 -82,169,000 -106,375,000 -36,666,000  -39,793,000 2,708,000 -5,868,000                                          
          change in assets and liabilities:
                                                                                         
          rents receivable and other assets
        698,000 -1,325,000 211,000 -793,000 -657,000 441,000 -861,000 -662,000 -379,000 -3,374,000 -1,071,000 -1,265,000 -326,000 80,000 58,000 269,000 -1,104,000 -1,530,000 1,248,000 -733,000 -2,027,000 -3,036,000 80,000 -8,116,000 -137,000 -2,893,000 -5,446,000 -11,410,000 -2,946,000 -860,000 -1,663,000 -18,239,000 -3,447,000 -6,747,000 1,759,000 -15,486,000 -865,000 -26,145,000 8,216,000 -28,678,000 -26,187,000                                         
          accounts payable, accrued expenses and other
        2,254,000 3,397,000 1,372,000 -9,097,000 3,852,000 2,579,000 186,000 -7,018,000 4,489,000 2,531,000 2,961,000 -4,468,000 -1,145,000 2,934,000 -2,734,000 535,000 -4,660,000 2,132,000 552,000 -1,128,000 1,847,000 4,021,000 -4,631,000 -6,548,000 5,819,000 1,991,000                                                        
          rent collected in advance
        -578,000 63,000 540,000 176,000 -143,000 -999,000 317,000 460,000 -282,000 -126,000 -969,000 -254,000 1,562,000 51,000 -606,000 51,000 1,067,000 -660,000 390,000 -996,000 -406,000 -21,000 -312,000 -1,871,000 1,269,000 -1,955,000 -1,185,000 -1,786,000 47,000 -4,776,000 750,000 416,000 -3,069,000 -2,261,000 1,604,000 -3,255,000 -2,350,000 2,427,000 -7,919,000 -620,000 5,170,000                                         
          net cash from operating activities
        10,676,000 33,105,000 32,906,000 22,443,000 35,825,000 35,081,000 28,254,000 23,108,000 32,657,000 18,437,000 11,030,000 2,916,000 5,580,000 7,418,000 1,563,000 1,548,000 1,618,000 8,461,000 11,471,000 11,778,000                                                              
          capital expenditures
                                                                     
          free cash flows
        10,676,000 33,105,000 32,906,000 22,443,000 35,825,000 35,081,000 28,254,000 23,108,000 32,657,000 18,437,000 11,030,000 2,916,000 5,580,000 7,418,000 1,563,000 1,548,000 1,618,000 8,461,000 11,471,000 11,778,000                                                              
          cash flows from investing activities:
                                                                                         
          real estate improvements
        -763,000 -1,781,000 -5,870,000 -5,055,000 -1,078,000 -1,540,000 -1,898,000 -1,175,000 -388,000 -662,000 -1,877,000 -650,000 -824,000 -1,905,000 -467,000 -3,607,000 -4,161,000 -4,941,000 -1,397,000 -1,540,000 -4,636,000 -3,343,000 -3,733,000 -14,340,000 -8,212,000 -9,515,000 -19,442,000 -12,761,000 -13,113,000 -13,715,000 -18,096,000 -19,889,000 -29,344,000 -31,817,000 -34,326,000 -25,963,000 -27,237,000 -14,773,000 -16,460,000 -12,163,000 -17,716,000                                         
          proceeds from sale of properties
                7,000        238,000 82,454,000 572,599,000 344,408,000 427,379,000 6,745,000 147,012,000 62,998,000 744,324,000 103,035,000 513,989,000 91,162,000 94,138,000 115,068,000 645,629,000 270,383,000 118,391,000 266,241,000 463,587,000 942,162,000 19,841,000 120,000   3,836,000 31,700,000 2,163,000   165,808,000 97,362,000 190,517,000   142,327,000   138,474,000   662,000    4,410,000               
          net cash from investing activities
            -1,078,000    -381,000 -572,000 -1,877,000 -650,000 -824,000 1,477,000 -3,849,000 -3,607,000 -3,923,000 -4,941,000 81,057,000 571,059,000                                                              
          cash flows from financing activities:
                                                                                         
          repurchase and retirement of common shares
        -3,056,000 -56,803,000 -3,395,000 -29,394,000 -15,017,000 -37,582,000 -77,877,000 -163,325,000 -11,122,000 -948,000 -6,093,000 -2,000 -14,000 -26,881,000 -145,000 -5,342,000 -4,066,000 -89,910,000                                                      
          contributions from holders of noncontrolling interest
                1,000             1,000 30,000                                                  
          distributions to common shareholders
        -2,036,000 -468,232,000 -110,737,000 -1,462,000 -6,024,000 -425,859,000 -1,936,000 -427,489,000 -1,160,000                                                         
          distributions to preferred shareholders
        -1,997,000 -1,997,000 -1,997,000 -1,997,000 -1,997,000 -1,997,000 -1,997,000 -1,997,000 -1,997,000 -1,997,000 -1,997,000 -1,997,000 -1,997,000 -1,997,000 -1,997,000 -1,997,000 -1,997,000 -1,997,000 -1,997,000 -1,997,000 -1,997,000 -1,997,000 -1,997,000 -1,997,000 -1,997,000 -1,997,000 -1,997,000 -1,997,000 -1,997,000 -1,997,000 -1,997,000 -1,997,000 -1,997,000 -6,981,000 -6,981,000 -6,981,000 -6,981,000 -6,981,000 -6,981,000 -6,981,000                                         
          distributions to holders of noncontrolling interest
          -3,000 -1,843,000       -852,000 -997,000                                                              
          net cash from financing activities
        -1,997,000 -2,047,000 -7,089,000 -2,000,000 -58,800,000 -1,997,000 -475,467,000 -142,408,000 -17,014,000 -39,579,000 -81,335,000 -165,322,000 -13,119,000 -2,978,000 -14,114,000 -428,710,000 -27,158,000 -2,173,000 -31,959,000                                                              
          increase in cash and cash equivalents
        37,305,000 29,327,000 24,989,000 10,299,000                             -310,500,000 632,837,000 30,209,000 -60,601,000 153,567,000 362,260,000 865,166,000 57,220,000 -218,347,000 169,032,000       824,000    141,280,000 -105,259,000 120,498,000 -4,911,000 2,821,000 19,799,000 -8,426,000 1,212,000 12,186,000 -4,677,000 -3,387,000 5,967,000 5,276,000  -1,641,000 -488,000 16,142,000    374,000 -4,608,000 7,016,000 -24,056,000 32,083,000  2,346,000 -5,885,000 12,199,000 
          cash and cash equivalents at beginning of period
        2,160,535,000  2,582,222,000                     2,094,674,000 1,802,729,000 364,516,000  222,449,000 102,219,000 192,763,000 194,040,000 18,204,000 15,518,000 19,879,000 -1,083,000 17,783,000 19,445,000 21,961,000 11,526,000 12,384,000 
          cash and cash equivalents at end of period
        37,305,000 29,327,000 24,989,000 2,170,834,000  -25,259,000 24,359,000 2,128,688,000  851,000 -30,426,000 2,721,929,000                  265,528,000 79,012,000 1,888,537,000 -310,500,000 632,837,000 30,209,000 1,742,128,000 153,567,000 362,260,000 865,166,000 421,736,000  169,032,000 250,818,000 177,555,000 88,470,000 28,828,000 48,692,000 -54,782,000 193,587,000 155,638,000 29,646,000 25,389,000 141,280,000 -105,259,000 138,702,000 -4,911,000 2,821,000 35,317,000 -8,426,000 1,212,000 32,065,000 -5,760,000 -3,387,000 5,967,000 23,059,000 -15,675,000 -1,641,000 -488,000 35,587,000 -2,069,000 2,593,000 -3,414,000 22,335,000 -4,608,000 7,016,000 -24,056,000 43,609,000 -9,518,000 2,346,000 -5,885,000 24,583,000 
          cash from investing activities
         -1,781,000 -5,870,000 -5,055,000   -1,898,000 -1,175,000             -4,636,000 -3,343,000 340,675,000 663,039,000 -1,467,000 143,096,000 48,876,000 751,619,000 92,868,000 499,411,000 74,230,000 -200,923,000 108,213,000 612,838,000 242,127,000 88,941,000 237,152,000 449,817,000 928,753,000 33,171,000 -15,869,000 687,459,000   -22,008,000 -10,455,000 66,139,000                              33,744,000     
          decrease in cash and cash equivalents
            32,747,000 -25,259,000 24,359,000 -453,534,000  851,000                     79,012,000 -206,137,000                                                  
          cash and cash equivalents at beginning of year
                                                                                         
          cash and cash equivalents at end of year
                                                                                         
          net amortization of debt premiums and deferred financing fees
                                                                                         
          gain on early extinguishment of debt
                                        2,562,000                                                
          payments on borrowings
                        -25,147,000 -146,000 -148,000 -145,000 -140,000 -255,414,000 -143,000 -5,668,000 -266,000 -400,261,000 -175,265,000 -2,581,000 -250,348,000 -41,776,000 -348,000 -418,596,000 -842,000 -827,000 -139,922,000 -116,804,000 -960,000 -140,319,000 -1,589,000 -234,142,000                                         
          redemption of noncontrolling interest
                                                                                       
          increase in cash, cash equivalents, and restricted cash
                    -160,566,000 -4,224,000 -5,264,000 -16,173,000 -431,015,000 -23,638,000 90,355,000 550,878,000 -409,586,000 27,373,000 111,590,000 667,167,000 -278,935,000 167,500,000 -329,130,000 484,076,000                                                      
          cash, cash equivalents, and restricted cash at beginning of year
                                                                                         
          cash, cash equivalents, and restricted cash at end of year
                                                                                         
          payment of transaction costs
                                                                                         
          decrease in cash, cash equivalents, and restricted cash
                   -79,069,000                                                                      
          cash, cash equivalents, and restricted cash at beginning of period
                   2,800,998,000  2,987,225,000  2,800,645,000  2,404,101,000  2,360,590,000                                                      
          net amortization of debt discounts, premiums and deferred financing fees
                        -3,000 -60,000 -56,000 -60,000 -55,000 154,000 165,000 548,000 559,000 645,000 801,000 789,000 784,000 849,000 713,000 845,000 948,000 949,000 983,000 1,005,000 171,000 -177,000 29,000 151,000    -592,000 284,000 629,000 1,005,000 746,000 1,515,000 1,920,000 2,032,000                              
          amortization of acquired real estate leases
                            53,000 52,000 53,000 172,000 453,000 565,000 997,000 1,921,000 2,118,000 2,415,000 2,540,000 2,840,000 3,455,000 10,205,000 4,629,000 5,891,000 7,973,000 10,109,000 10,304,000 11,709,000 11,625,000 15,827,000 11,979,000 13,290,000 16,157,000 16,903,000 15,011,000 14,411,000 13,509,000 10,572,000 9,573,000 8,334,000 7,632,000 7,454,000 9,555,000 7,131,000 9,898,000 7,480,000 7,535,000 7,473,000 7,392,000 7,530,000 8,320,000 7,724,000 7,603,000 7,527,000 7,293,000 7,675,000 6,400,000 5,970,000 5,458,000 5,197,000 5,354,000 4,243,000       
          (gain) loss on early extinguishment of debt
                                                                                        
          proceeds from maturity of marketable securities
                            250,000,000                                                          
          cash, cash equivalents, and restricted cash at end of period
                      -5,264,000 2,971,052,000  -23,638,000 90,355,000 3,351,523,000  27,373,000 111,590,000 3,071,268,000  167,500,000 -329,130,000 2,844,666,000                                                      
          loss on sale of marketable securities
                                                                                         
          loss on sale of real estate mortgage receivable
                                                                                        
          insurance proceeds received
                                1,443,000 2,000,000 2,000,000                                                  
          proceeds from sale of real estate mortgage receivable
                                                                                        
          proceeds from sale of marketable securities
                                5,320,000 18,613,000                                                      
          straight line rental income
                         -367,000 515,000 198,000 -69,000 499,000 -11,000 -837,000 -986,000 -1,435,000 -1,022,000 -1,528,000 -1,938,000 -3,557,000 -4,543,000 -4,387,000 -1,699,000 -2,954,000 -5,599,000 -3,831,000 -1,743,000 -1,901,000 -1,798,000 187,000 -2,361,000                                         
          loss on early extinguishment of debt
                              719,000 1,536,000 4,867,000  203,000      118,000    428,000     60,027,000 1,608,000 67,000               1,659,000     2,866,000   
          adjustments to reconcile net income to cash from operating activities:
                                                                                         
          cash from operating activities
                            24,851,000 32,853,000 28,471,000 12,770,000 38,989,000 26,667,000 24,251,000 -371,000 35,670,000 18,462,000 48,554,000 -2,690,000 46,304,000 22,838,000 70,890,000 22,984,000 40,121,000 17,421,000 83,681,000 40,321,000 39,673,000 31,567,000 82,525,000 46,627,000 52,959,000 93,869,000 42,832,000 103,552,000 35,151,000 67,128,000 110,044,000 29,020,000 62,181,000 88,024,000 48,154,000 58,951,000 111,833,000 62,808,000 74,782,000 103,642,000 62,031,000 73,508,000 65,357,000 95,679,000 37,030,000 99,500,000 45,460,000 86,782,000 54,637,000 45,400,000 63,663,000 109,928,000 6,963,000 48,486,000 81,285,000 49,463,000 29,970,000 53,912,000 56,456,000 49,170,000 40,666,000 
          principal payments received from real estate mortgages receivable
                                                                                         
          purchase of marketable securities
                                    -276,238,000                                                  
          cash from financing activities
                            -429,801,000 -2,137,000 -257,556,000 -8,642,000 -316,457,000 -2,263,000 -402,257,000 -267,172,000 -7,557,000 -252,345,000 -43,772,000 -2,524,000 -465,017,000 -2,839,000 -282,808,000 -172,518,000 -123,785,000 -95,924,000 -147,300,000 -15,713,000 -241,123,000       23,726,000 89,101,000 194,778,000 150,344,000 55,773,000 81,259,000 -46,039,000 86,929,000 -1,909,000 42,030,000 14,372,000  -69,943,000 77,323,000  -1,531,000 63,789,000 52,980,000     99,080,000 95,025,000 99,828,000 8,331,000 28,398,000    454,840,000 83,163,000 16,281,000 70,822,000 
          loss on marketable securities
                                 4,987,000                                                      
          foreign currency exchange loss
                                          5,000 -96,000                                             
          real estate acquisitions
                                                       -29,012,000 -147,872,000         -9,000 -23,088,000                       
          redemption of preferred shares
                                                                                       
          deferred financing fees
                                        -52,000 -7,143,000                                          
          effect of exchange rate changes on cash
                                        -8,000 79,000 -9,054,000 32,000 -559,000 -1,028,000 -855,000 100,000 657,000   221,000  183,000  428,000 155,000                              
          accounts payable and accrued expenses
                                   -10,139,000 9,712,000 -8,253,000 13,547,000 -24,053,000 9,966,000 -3,333,000 4,391,000 -6,361,000 1,126,000 -4,922,000 10,287,000 -11,134,000 -9,437,000                                         
          security deposits
                                   57,000 -354,000 -20,000 -144,000 181,000 30,000 10,000 416,000 -192,000 -73,000 701,000 546,000 51,000 396,000 -204,000 37,000 204,000 405,000                                     
          principal payments received from direct financing lease
                                            1,635,000 1,928,000 1,906,000 1,883,000 1,860,000 1,839,000 1,817,000 1,795,000 1,752,000 1,733,000 1,711,000 1,651,000 1,632,000 1,593,000 1,574,000 476,000                              
          proceeds from sale of securities
                                            27,068,000                                          
          purchase and retirement of common shares
                                    -2,979,000 -209,000 -44,424,000 -25,563,000                                             
          restricted cash
                                     -200,000 397,000 1,311,000 5,432,000 -2,004,000 -3,657,000 -458,000 -295,000 -3,358,000 -5,283,000 2,366,000 -2,148,000 4,993,000 -4,721,000 5,362,000 1,183,000 -2,134,000 3,100,000                                   
          increase in restricted cash
                                     -863,000 -836,000 -934,000    -3,487,000 -3,487,000 -925,000 1,145,000 -3,458,000                                          
          equity in earnings of investees
                                                                                        
          gain on sale of equity investments
                                                 -171,754,000                                        
          gain on issuance of shares by an equity investee
                                                                                        
          distributions of earnings from investees
                                                10,560,000 10,120,000 9,680,000 4,111,000 2,679,000 2,913,000 2,740,000 2,864,000 2,675,000                              
          other non-cash expenses
                                                2,591,000 -12,858,000 7,906,000 10,496,000                                      
          due to related persons
                                                -9,324,000     1,678,000                                   
          purchase of securities
                                                                                         
          proceeds from sale of equity investments
                                                 704,716,000                        308,333,000             
          decrease (increase) in restricted cash
                                        24,791,000 -974,000       -13,000                     466,000        -1,253,000            
          foreign currency exchange gain
                                                                                         
          net (gain) loss on sale of properties
                                                                                         
          distributions in excess of earnings from investees
                                                    168,000 1,500,000 1,266,000 1,439,000 1,315,000 1,405,000                              
          deconsolidation of a subsidiary
                                                                                         
          proceeds from issuance of common shares
                                                    -182,000 626,991,000 -140,000 180,954,000    191,683,000 239,095,000       124,923,000 4,490,000 10,663,000 12,998,000     124,957,000 259,017,000 323,639,000     
          repurchase and retirement of outstanding debt securities
                                                                                         
          proceeds from borrowings
                                                    100,000,000 15,000,000 921,000,000 106,000,000 338,500,000 265,000,000 190,000,000 295,000,000 957,632,000 135,000,000 56,000,000 105,000,000 404,000,000 96,000,000 118,000,000 52,000,000 188,000,000 155,000,000 360,865,000 584,475,000 120,000,000 68,000,000 80,000,000 113,000,000 851,000,000 436,247,000 242,000,000 200,000,000 180,000,000 113,000,000 1,075,436,000 27,000,000 445,000,000 669,450,000 135,000,000 121,000,000 298,004,000 
          distributions to noncontrolling interest in consolidated subsidiary
                                                                                         
          loss on sale of equity investments
                                                                                         
          loss (reversal of loss) on asset impairment
                                               1,904,000                                          
          gain on sale of equity investment
                                                                                         
          proceeds from sale of equity investment
                                                    239,576,000                                   
          investment in affiliates insurance company
                                                                                         
          (reversal of) loss on asset impairment
                                                                                         
          gain on sale of properties
                                                                                         
          increase in rents receivable and other assets
                                                                                         
          increase in accounts payable and accrued expenses
                                                         2,880,000      -3,466,000   5,961,000               204,000 4,967,000   4,280,000 1,585,000   
          increase in rent collected in advance
                                                         4,065,000 2,373,000 229,000 1,948,000 -3,476,000 3,577,000 1,147,000 -4,179,000 5,063,000   728,000 4,655,000 -2,612,000 -196,000 3,340,000 -619,000 -323,000 -2,580,000 5,256,000 -2,202,000 2,012,000 2,163,000 677,000 -1,417,000 3,372,000 -3,370,000 3,488,000 836,000 -1,885,000   
          increase in security deposits
                                                       468,000 245,000 1,300,000 553,000 219,000    29,000   5,063,000 320,000 661,000 32,000 -45,000   847,000 73,000 504,000 898,000 143,000 818,000 828,000 113,000 410,000 1,786,000 122,000 82,000 221,000 708,000 -228,000 375,000 
          increase in due to related persons
                                                       997,000 2,372,000                                 
          investment in direct financing lease
                                                                                         
          principal payments received from real estate mortgage receivable
                                                                                         
          proceeds from issuance of preferred shares
                                                         -413,000                368,270,000 145,015,000             
          supplemental cash flow information:
                                                                                         
          interest paid
                                                       32,256,000 66,971,000   58,306,000      51,554,000 53,168,000 33,655,000 50,973,000        48,200,000  48,595,000 21,274,000 50,797,000   15,462,000 31,283,000    16,772,000 
          taxes paid
                                                       502,000 34,000   160,000                              
          non-cash investing activities:
                                                                                         
          investment in real estate mortgages receivable
                                                                                         
          non-cash financing activities:
                                                                                         
          issuance of common shares
                                                                 9,000 14,373,000                    180,000 14,000 773,000 
          assumption of mortgage notes payable
                                                                  8,915,000          7,532,000             
          assumption of note payable
                                                                                         
          decrease in accounts payable and accrued expenses
                                                                                         
          assumption of mortgage note payable
                                                        147,872,000                                 
          real estate acquisitions and improvements
                                                                                         
          proceeds from investment in marketable pass through certificates
                                                                                         
          purchase of noncontrolling equity interest
                                                                                         
          increase in due to affiliates
                                                          129,000 2,493,000 16,506,000 -1,192,000 1,979,000 11,012,000 4,348,000 3,284,000 9,634,000 1,490,000 930,000     -6,935,000        -14,402,000    -6,297,000 4,925,000 -62,000 4,268,000 
          amortization of debt discounts, premiums and deferred financing fees
                                                            1,839,000 1,874,000 1,931,000 1,574,000 1,886,000 1,642,000 1,432,000 1,420,000 1,085,000 1,170,000 1,085,000                   
          equity in earnings of equity investments
                                                                                         
          gain on issuance of shares by equity investee
                                                                                         
          distributions of earnings from equity investments
                                                            1,964,000 716,000 3,980,000           3,136,000 4,412,000 3,494,000 3,052,000 3,394,000 4,322,000 3,604,000 3,731,000 3,800,000 9,556,000 3,886,000 3,653,000 4,288,000 
          investment in marketable pass through certificates
                                                                                         
          distributions in excess of earnings from equity investments
                                                            2,115,000             2,251,000 1,280,000 2,157,000 2,600,000 2,257,000 1,649,000 2,271,000 2,144,000 3,051,000 -2,705,000 2,965,000 3,198,000 2,563,000 
          gain on sale of property
                                                                                         
          decrease in restricted cash
                                                              1,172,000  -1,220,000 3,064,000 -614,000 -962,000 6,484,000   -2,336,000 7,400,000    5,032,000    2,419,000   -1,522,000 2,077,000  -1,988,000 -2,984,000 5,783,000 
          decrease in security deposits
                                                                                         
          proceeds from sale of property
                                                                 19,200,000                        
          real estate sales
                                                                                         
          mortgage notes related to properties sold
                                                                                         
          gain on issuance of shares by equity investees
                                                                                         
          cash from (used for) financing activities
                                                                                         
          decrease in due to affiliates
                                                                                         
          amortization of note discounts and premiums and deferred financing fees
                                                                        1,097,000 1,104,000 1,105,000 1,105,000 1,138,000 763,000 392,000 668,000 665,000 755,000        
          cash from (used for) investing activities
                                                                            89,059,000             
          gain on sale of shares of equity investments
                                                                                         
          proceeds from sale of common shares of equity investment
                                                                                 18,862,000 54,413,000     
          proceeds from sale of real estate
                                                                                     -11,000   
          (gain) loss on issuance of shares by equity investees
                                                                                         
          amortization of note discounts and deferred financing fees
                                                                                   1,511,000 1,435,000 1,509,000 1,480,000 1,513,000 1,473,000 
          gain on equity transactions of equity investments
                                                                                         
          amortization of in place leases
                                                                                    1,931,000     
          reversal of impairment of assets
                                                                                         
          loss on equity transactions of equity investments
                                                                                         
          proceeds from repayment of real estate mortgages receivable
                                                                                         
          purchase of five star quality care, inc. common shares
                                                                                         
          repurchase of common shares
                                                                                         
          fas 141 lease value amortization
                                                                                         
          loss on equity transaction of equity investments
                                                                                         
          proceeds from issuance of common shares, net of issuance costs
                                                                                         
          cash paid for interest
                                                                                      29,157,000   
          early extinguishment of debt
                                                                                        1,751,000 
          decrease in rent collected in advance
                                                                                         
          extraordinary item
                                                                                         
          increase in deferred rents
                                                                                         
          real estate acquired by foreclosure
                                                                                         
          investments in real estate mortgages receivable
                                                                                         
          receipt of five star quality care, inc. common shares
                                                                                         
          distribution of five star quality care, inc. common shares