7Baggers
Quarterly
Annual
    Unit: USD2025-09-30 2025-06-30 2025-03-31 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 2016-09-30 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 2013-12-31 2013-09-30 2013-06-30 2013-03-31 2012-12-31 2012-09-30 2012-06-30 2012-03-31 2011-12-31 2011-09-30 2011-06-30 2011-03-31 2010-12-31 2010-09-30 2010-06-30 2010-03-31 2009-12-31 2009-09-30 2009-06-30 2009-03-31 2008-12-31 2008-09-30 2008-06-30 2008-03-31 2007-12-31 2007-09-30 2007-06-30 2007-03-31 2006-12-31 
      
    		                                                                           
      assets
    		                                                                           
      real estate, at cost
    		28,609,784,000 28,428,074,000 28,115,423,000 27,870,623,000 27,557,824,000 27,273,494,000 27,063,048,000 26,749,209,000 26,031,390,000 25,762,722,000 25,559,720,000 25,389,663,000 25,192,376,000 24,700,571,000 23,902,226,000 23,752,630,000 23,711,400,000 23,417,175,000 23,156,924,000 22,969,110,000 22,770,691,000 22,575,903,000 22,342,209,000 22,502,976,000 22,288,800,000 21,943,208,000 21,741,265,000 21,649,896,000 21,687,639,000 21,526,520,000 21,316,644,000 21,096,642,000 20,859,245,000 20,614,366,000 20,392,260,000 19,902,756,000 18,690,403,000 18,424,542,000 19,481,535,000 18,412,086,000 18,207,934,000 18,153,816,000 19,236,403,000 18,362,993,000 17,680,555,000 17,258,665,000 18,978,765,000 17,105,492,000 17,059,235,000 13,503,575,000 14,893,328,000 13,165,836,000 13,143,487,000 12,937,143,000  12,031,660,000 11,786,353,000 11,567,294,000  10,015,347,000 9,984,329,000 9,823,024,000  9,768,619,000 9,687,069,000 9,577,375,000  9,434,884,000 9,277,500,000 9,231,874,000  8,961,830,000 9,037,468,000 9,019,237,000  
      right of use assets - finance leases
    		372,747,000 372,839,000 372,845,000 372,922,000 372,896,000 372,896,000 401,486,000 401,680,000 237,532,000 237,526,000 237,503,000 237,510,000 237,505,000 237,488,000 237,501,000 237,507,000 237,845,000 237,765,000 237,017,000 237,393,000 237,382,000 237,394,000 237,394,000 237,394,000 237,394,000 187,269,000 187,292,000                                                 
      right of use assets - operating leases
    		321,063,000 325,670,000 330,129,000 334,767,000 339,804,000 344,292,000 344,255,000 324,298,000 322,790,000 166,421,000 166,699,000 167,351,000 167,935,000 168,370,000 169,248,000 169,778,000 170,085,000 170,331,000 144,143,000 146,406,000 146,973,000 147,512,000 148,057,000 148,640,000 149,231,000 149,839,000 151,166,000                                                 
      less: accumulated depreciation
    		-8,008,908,000 -7,863,743,000 -7,699,234,000 -7,528,057,000 -7,369,545,000 -7,198,566,000 -7,040,501,000 -6,881,728,000 -6,723,616,000 -6,568,568,000 -6,424,547,000 -6,298,082,000 -6,170,472,000 -6,077,270,000 -5,995,760,000 -5,883,961,000 -5,850,397,000 -5,752,818,000 -5,665,061,000 -5,534,102,000 -5,413,709,000 -5,292,389,000 -5,209,487,000 -5,266,798,000 -5,164,353,000 -5,050,606,000 -4,962,959,000 -4,897,777,000 -4,838,496,000 -4,745,590,000 -4,674,838,000  -4,484,798,000 -4,379,446,000 -4,302,283,000 -4,113,553,000 -4,056,716,000 -3,969,648,000 -3,925,894,000 -3,833,277,000 -3,753,926,000 -3,646,853,000 -3,547,659,000 -3,469,130,000 -3,368,974,000 -3,263,208,000 -3,161,571,000 -3,076,280,000 -2,996,520,000 -2,919,980,000 -2,934,160,000 -2,843,167,000 -2,781,218,000 -2,722,605,000 -2,642,986,000 -2,558,620,000 -2,468,165,000 -2,411,378,000 -2,323,818,000 -2,243,265,000 -2,173,300,000 -2,103,274,000 -2,033,677,000 -1,966,780,000 -1,901,558,000 -1,835,283,000 -1,768,785,000 -1,710,875,000 -1,647,145,000 -1,589,686,000 -1,531,707,000 -1,488,077,000 -1,474,771,000 -1,414,857,000 -1,392,055,000 
      total real estate
    		21,294,686,000 21,262,840,000 21,119,163,000 21,050,255,000 20,900,979,000 20,792,116,000 20,768,288,000 20,593,459,000 19,868,096,000 19,598,101,000 19,539,375,000 19,496,442,000 19,427,344,000 19,029,159,000 18,313,215,000 18,275,954,000 18,268,933,000 18,072,453,000 17,873,023,000 17,818,807,000 17,741,337,000 17,668,420,000 17,518,173,000 17,622,212,000 17,511,072,000 17,229,710,000 17,116,764,000 16,752,119,000 16,849,143,000 16,780,930,000 16,641,806,000 16,507,008,000 16,374,447,000 16,234,920,000 16,089,977,000 15,789,203,000 15,740,152,000 15,569,424,000 15,555,641,000 15,569,008,000 15,612,331,000 15,575,438,000 15,688,744,000 15,886,276,000 15,894,949,000 15,860,776,000 15,817,194,000 15,826,599,000 15,835,914,000 12,270,705,000 11,959,168,000 11,534,066,000 11,365,172,000 11,352,574,000 10,746,486,000 10,639,176,000 10,584,621,000 10,597,044,000 10,441,117,000 9,529,710,000 9,175,766,000 9,112,760,000 9,065,881,000 9,020,214,000 8,960,285,000 8,898,077,000 8,849,559,000 8,791,304,000 8,619,040,000 8,527,908,000 8,718,188,000 8,315,692,000 8,337,015,000 8,308,750,000 8,160,403,000 
      cash and cash equivalents
    		861,066,000 446,953,000 398,126,000 1,254,882,000 1,420,475,000 685,376,000 701,695,000 1,531,477,000 882,647,000 1,581,575,000 918,952,000 690,333,000 375,774,000 456,491,000 436,271,000 452,692,000 1,002,728,000 557,307,000 697,369,000 1,668,742,000 1,714,783,000 1,691,047,000 660,733,000 644,950,000 751,210,000 1,087,001,000 360,091,000 543,359,000 322,502,000 472,555,000 294,571,000 434,767,000 493,055,000 492,435,000 302,939,000 419,323,000 1,180,044,000 1,605,678,000 723,718,000 1,387,007,000 1,342,751,000 1,064,396,000 1,763,079,000 846,664,000 1,036,576,000 1,179,573,000 2,365,137,000 1,641,275,000 1,608,731,000 909,376,000 1,041,978,000 1,223,215,000 1,671,997,000 591,196,000 1,823,208,000 1,063,024,000 780,584,000 747,305,000 478,948,000 1,270,074,000 1,703,448,000 1,220,392,000 1,448,933,000 782,106,000 819,245,000 143,789,000 241,510,000 55,597,000 112,110,000 794,643,000 1,506,921,000 1,894,198,000 1,885,318,000 2,016,336,000 725,788,000 
      cash held in escrows
    		77,663,000 80,888,000 81,081,000 80,314,000 51,009,000 52,125,000 64,939,000 81,090,000 47,741,000 46,915,000 45,330,000 46,479,000 73,112,000 46,359,000 46,072,000 48,466,000 79,193,000 79,973,000 251,814,000 50,587,000 50,006,000 300,608,000 197,845,000 46,936,000 53,555,000 75,923,000 72,207,000 95,832,000 101,282,000 254,505,000 160,558,000 70,602,000 83,779,000 47,345,000 51,244,000 63,980,000 65,654,000 71,349,000 73,790,000 90,379,000 252,558,000 588,218,000 487,321,000 153,161,000 59,248,000 54,240,000 57,201,000 53,499,000 54,829,000 55,410,000 55,181,000 32,253,000 31,381,000 30,697,000 40,332,000 36,759,000 302,439,000 305,692,000 308,031,000 300,771,000 25,382,000 20,848,000 21,867,000 20,681,000 22,289,000 19,420,000 21,970,000 34,311,000 59,644,000 57,640,000 186,839,000 17,835,000 22,665,000 20,334,000 25,784,000 
      investments in securities
    		43,604,000 41,062,000 38,310,000 39,706,000 39,186,000 36,844,000 37,184,000 36,337,000 32,809,000 33,481,000 32,099,000 32,277,000 30,040,000 31,457,000 36,032,000 43,632,000 41,517,000 41,476,000 39,002,000 39,457,000 34,934,000 32,848,000 28,101,000 36,747,000 34,375,000 33,411,000 32,052,000 28,198,000 31,376,000 30,063,000 29,353,000 29,161,000 27,981,000 26,781,000 25,817,000 23,022,000 21,775,000 21,077,000 20,380,000 19,645,000 20,953,000 20,736,000 19,459,000 18,834,000 18,927,000 18,026,000 16,641,000 15,377,000 14,226,000 13,825,000 12,172,000 11,792,000 11,036,000 11,193,000 9,548,000 9,312,000 9,975,000 9,800,000  7,911,000 7,026,000 7,592,000  10,436,000 11,173,000 9,408,000  16,160,000 20,372,000 23,404,000      
      tenant and other receivables
    		136,743,000 109,683,000 117,353,000 107,453,000 99,706,000 82,145,000 94,115,000 122,407,000 123,138,000 91,968,000 85,603,000 81,389,000 69,633,000 64,607,000 56,132,000 70,186,000 61,269,000 58,624,000 51,271,000 77,411,000 76,330,000 82,545,000 89,431,000 112,807,000 102,155,000 87,727,000 92,462,000 86,629,000 98,502,000 63,660,000 73,401,000 92,186,000 79,750,000 88,687,000 73,012,000 76,258,000 84,861,000 73,759,000 97,865,000 66,446,000 55,183,000 47,768,000 46,595,000 43,210,000 51,348,000 37,812,000 59,464,000 55,393,000 66,039,000 75,849,000 69,555,000 45,039,000 43,507,000 68,275,000 79,838,000 47,554,000 44,470,000 54,740,000 129,818,000 113,655,000 98,602,000 102,085,000 93,240,000 71,845,000 78,495,000 69,116,000 68,743,000 57,554,000 42,116,000 34,580,000 58,074,000 43,199,000 48,398,000 50,799,000 57,052,000 
      note receivable
    		8,898,000 6,711,000 5,535,000 4,947,000 3,937,000 3,155,000 2,274,000 1,714,000               15,794,000 15,920,000 19,844,000 19,718,000 19,593,000 19,468,000                                                
      related party notes receivable
    		88,879,000 88,825,000 88,816,000 88,779,000 88,788,000                                             282,307,000 282,491,000 282,206,000 282,416,000 281,177,000 280,442,000 276,375,000 276,375,000                   
      sales-type lease receivable
    		15,430,000 15,188,000 14,958,000 14,657,000 14,429,000 14,182,000 13,943,000 13,704,000 13,475,000 13,250,000 13,028,000 12,811,000                                                                
      accrued rental income
    		1,532,403,000 1,509,347,000 1,490,522,000 1,466,220,000 1,438,492,000 1,414,622,000 1,390,217,000 1,355,212,000 1,331,796,000 1,318,320,000 1,297,767,000 1,276,580,000 1,250,176,000 1,265,480,000 1,243,395,000 1,226,745,000 1,203,840,000 1,172,411,000 1,145,066,000 1,122,502,000 1,111,078,000 1,069,004,000 1,059,677,000 1,038,788,000 1,003,033,000 973,167,000 954,063,000 934,896,000 926,274,000 912,652,000 888,907,000 861,575,000 835,415,000 820,022,000 812,124,000 785,569,000 776,816,000 767,864,000 754,883,000 737,145,000 730,797,000 713,874,000 691,999,000 689,885,000 673,587,000 661,730,000 651,603,000 641,041,000 625,654,000 612,041,000 598,199,000 579,553,000 559,646,000 541,153,000 522,675,000 508,838,000 491,878,000 463,117,000 442,683,000 421,008,000 401,054,000 376,942,000 363,121,000 353,709,000 340,123,000 331,237,000 316,711,000 316,411,000 326,149,000 313,011,000 300,594,000 299,082,000 296,424,000 288,824,000 327,337,000 
      deferred charges
    		802,785,000 809,033,000 806,057,000 813,345,000 794,571,000 800,099,000 818,424,000 760,421,000 692,386,000 710,820,000 720,174,000 733,282,000 720,648,000 684,078,000 609,205,000 618,798,000 622,807,000 627,338,000 622,649,000 640,085,000 644,036,000 655,813,000 667,076,000 689,213,000 689,768,000 676,082,000 666,320,000 678,724,000 669,545,000 678,319,000 681,369,000 679,038,000 657,474,000 658,219,000 666,677,000 680,192,000 697,823,000 693,976,000 732,837,000 749,628,000 771,419,000 806,468,000 831,744,000 837,907,000 853,924,000 861,567,000 884,450,000 918,798,000 939,675,000 572,890,000 588,235,000 534,898,000 504,475,000 500,957,000 445,403,000 441,700,000 449,014,000 449,076,000 436,019,000 300,882,000 289,388,000 291,564,000 294,395,000 288,642,000 283,830,000 301,889,000 326,401,000 314,562,000 305,287,000 294,002,000 287,199,000 257,469,000 264,664,000 244,846,000 274,079,000 
      prepaid expenses and other assets
    		137,561,000 89,624,000 138,868,000 70,839,000 132,078,000 86,188,000 146,286,000 64,230,000 121,431,000 77,457,000 141,933,000 43,589,000 107,538,000 55,232,000 128,472,000 57,811,000 97,560,000 46,946,000 129,102,000 33,840,000 106,524,000 56,768,000 136,730,000 41,685,000 110,308,000 68,701,000 131,472,000 80,943,000 133,443,000 85,972,000 147,256,000 77,971,000 144,817,000 93,985,000 150,905,000 176,693,000 144,222,000 136,799,000 185,118,000 143,476,000 117,993,000 165,985,000 164,432,000 219,074,000 133,035,000 178,488,000 184,477,000 238,688,000 179,741,000 71,756,000 90,610,000 132,109,000 41,480,000 73,132,000 75,458,000 102,812,000 92,470,000 100,897,000 65,663,000 42,391,000 22,385,000 50,998,000 17,684,000 41,977,000 22,905,000 47,664,000 22,401,000 44,039,000 26,511,000 51,357,000 30,566,000 55,658,000 47,174,000 63,896,000 40,868,000 
      investments in unconsolidated joint ventures
    		999,764,000 1,161,036,000 1,137,732,000 1,093,583,000 1,421,886,000 1,418,817,000 1,399,824,000 1,377,319,000 1,536,822,000 1,780,959,000 1,752,617,000 1,715,911,000 1,593,834,000 1,554,994,000 1,518,622,000 1,482,997,000 1,373,522,000 1,305,589,000 1,307,725,000 1,310,478,000 1,377,291,000 1,339,724,000 1,377,338,000 955,647,000 933,255,000 936,835,000 976,580,000 956,309,000 925,431,000 682,507,000 666,718,000 619,925,000 611,800,000 819,368,000 793,932,000 775,659,000 252,618,000 235,904,000 235,224,000 217,529,000 209,974,000 196,188,000 193,394,000 180,149,000 176,939,000 127,356,000 126,084,000 129,038,000 137,975,000 652,807,000 659,916,000 664,690,000 670,653,000 667,377,000 669,722,000 770,466,000 772,502,000 762,522,000 767,252,000 792,434,000 794,650,000 798,161,000 763,636,000 772,167,000 772,319,000 781,336,000 782,760,000 973,396,000 606,696,000 152,942,000 81,672,000 102,488,000 92,944,000 91,955,000 83,711,000 
      total assets
    		25,999,482,000 25,621,190,000 25,436,521,000 26,084,980,000 26,405,536,000 25,474,448,000 25,525,978,000 26,026,149,000 24,739,148,000 25,341,680,000 24,625,422,000 24,207,669,000 23,726,691,000 23,266,433,000 22,475,634,000 22,365,258,000 22,848,810,000 22,059,076,000 22,213,552,000 22,858,190,000 22,959,215,000 23,000,777,000 21,829,698,000 21,284,905,000 21,288,575,000 21,268,275,000 20,501,604,000 20,256,477,000 20,137,498,000 19,961,163,000 19,583,939,000 19,372,233,000 19,308,518,000 19,281,762,000 18,966,627,000 18,789,899,000 18,963,965,000 19,175,830,000 18,379,456,000 18,980,263,000 19,113,959,000 19,179,071,000 19,886,767,000 18,875,160,000 18,898,533,000 18,979,568,000 20,162,251,000 19,519,708,000 19,462,784,000 15,623,279,000 15,462,321,000 15,141,943,000 15,280,629,000 14,212,857,000 14,782,966,000 13,980,798,000 13,884,212,000 13,835,473,000 13,348,263,000 13,048,836,000 12,787,701,000 12,251,342,000 12,348,703,000 11,631,777,000 11,580,664,000 10,871,936,000 10,911,645,000 10,873,334,000 10,387,925,000 10,349,487,000 11,192,637,000 10,985,621,000 10,994,602,000 11,085,740,000 9,695,022,000 
      liabilities and equity
    		                                                                           
      liabilities:
    		                                                                           
      mortgage notes payable
    		4,279,482,000 4,278,788,000 4,277,710,000 4,276,609,000 4,275,155,000 4,371,478,000 4,368,367,000 4,166,379,000 3,275,974,000 3,274,764,000 3,273,553,000 3,272,368,000 3,271,157,000 3,269,948,000 3,268,745,000 3,267,914,000 2,898,699,000 2,901,709,000 2,904,672,000 2,909,081,000 2,912,494,000 2,915,852,000 2,919,157,000 2,922,408,000 2,952,006,000 2,956,833,000 2,959,908,000 2,964,572,000 2,967,548,000 2,972,052,000 2,974,930,000 2,979,281,000 2,982,067,000 2,986,283,000 2,046,959,000 2,077,707,000 3,189,013,000 3,416,622,000 3,438,714,000 4,132,071,000 4,269,808,000 4,289,120,000 4,309,484,000 4,328,464,000 4,411,453,000 4,430,110,000 4,449,734,000 4,468,069,000 4,484,657,000 3,053,798,000 3,102,485,000 2,848,686,000 2,877,125,000 2,946,760,000 3,123,267,000 3,179,034,000 3,181,469,000 3,188,025,000 3,047,586,000 2,813,338,000 2,608,577,000 2,637,534,000 2,643,301,000 2,643,497,000 2,603,597,000 2,669,705,000 2,660,642,000 2,282,699,000 2,535,496,000 2,760,620,000 2,726,127,000 2,644,393,000 2,855,889,000 2,973,571,000 2,679,462,000 
      unsecured senior notes
    		9,803,336,000 9,800,577,000 9,797,824,000 10,645,077,000 10,642,033,000 9,797,220,000 9,794,527,000 10,491,617,000 10,488,568,000 10,985,395,000 10,240,967,000 10,237,968,000 9,491,714,000 9,489,030,000 9,486,379,000 9,483,695,000 10,479,651,000 9,634,356,000 9,631,592,000 9,639,287,000 9,636,397,000 9,633,577,000 8,393,009,000 8,390,459,000 8,387,913,000 8,390,708,000 7,547,043,000 7,544,697,000 7,253,786,000 7,251,578,000 7,249,383,000 7,247,330,000 7,252,567,000 7,250,356,000 7,248,152,000 7,243,767,000 6,257,274,000 6,255,602,000 5,289,317,000 5,288,908,000 5,288,503,000 5,288,101,000 5,287,704,000 5,837,172,000 5,836,729,000 5,836,290,000 5,835,854,000 5,835,424,000 5,834,973,000 4,639,843,000 4,639,528,000 4,639,217,000 4,863,413,000 3,865,369,000 3,865,186,000 3,016,986,000 3,016,837,000 3,016,743,000 3,016,598,000 2,872,058,000 2,871,909,000 2,172,525,000 2,172,389,000 1,472,740,000 1,472,617,000 1,472,495,000 1,472,375,000 1,472,258,000 1,472,141,000 1,472,027,000 1,471,913,000 1,471,801,000 1,471,691,000 1,471,583,000 1,471,475,000 
      unsecured exchangeable senior notes
    		975,080,000                                              744,880,000 739,536,000 734,278,000 1,177,877,000 1,170,356,000 1,162,955,000 1,155,669,000 1,148,497,000 1,715,685,000 1,754,343,000 1,743,337,000 1,732,496,000 1,721,817,000 1,759,490,000 1,748,814,000 1,864,840,000 1,904,081,000 1,892,753,000 1,881,482,000 1,870,600,000 2,038,899,000 2,037,506,000 1,296,252,000 1,295,185,000 1,294,126,000 1,293,074,000 1,292,022,000 1,290,985,000 450,000,000 
      unsecured line of credit
    		 185,000,000 300,000,000          340,000,000 165,000,000 255,000,000 145,000,000       250,000,000      170,000,000  115,000,000 45,000,000   105,000,000                               100,000,000 100,000,000 319,000,000 200,000,000       
      unsecured term loans
    		796,798,000 796,640,000 796,158,000 798,813,000 798,058,000                                                                       
      unsecured commercial paper
    		750,000,000 750,000,000 500,000,000 500,000,000 500,000,000 500,000,000                                                                      
      lease liabilities - finance leases
    		363,207,000 365,897,000 368,379,000 370,885,000 373,260,000 375,601,000 415,888,000 417,961,000 253,178,000 251,874,000 250,567,000 249,335,000 248,092,000 246,832,000 245,554,000 244,421,000 243,562,000 243,381,000 239,361,000 236,492,000 233,288,000 230,146,000 227,067,000 224,042,000 221,029,000 172,902,000 173,123,000                                                 
      lease liabilities - operating leases
    		379,792,000 399,174,000 395,638,000 392,686,000 389,444,000 385,842,000 377,667,000 350,391,000 341,299,000 204,826,000 204,435,000 204,686,000 205,008,000 204,643,000 204,677,000 204,561,000 204,137,000 226,594,000 200,383,000 201,713,000 201,337,000 200,979,000 200,573,000 200,180,000 199,755,000 199,344,000 199,653,000                                                 
      accounts payable and accrued expenses
    		484,798,000 480,158,000 398,760,000 401,874,000 444,288,000 372,484,000 374,681,000 458,329,000 462,240,000 434,574,000 397,798,000 417,545,000 360,572,000 342,467,000 304,576,000 320,775,000 331,687,000 305,969,000 260,875,000 336,264,000 345,959,000 328,292,000 293,831,000 377,553,000 421,269,000 418,429,000 328,885,000 276,645,000 315,462,000 327,067,000 355,002,000 331,500,000 325,440,000 303,559,000 313,723,000 312,979,000 287,464,000 252,727,000 274,709,000 245,200,000 231,900,000 224,086,000 243,263,000 253,600,000 216,080,000 218,028,000 202,470,000 215,778,000 212,998,000 210,359,000 199,102,000 193,492,000 163,496,000 165,441,000 155,139,000 172,928,000 173,257,000 171,617,000 186,059,000 199,534,000 177,000,000 189,633,000 220,089,000 229,177,000 223,909,000 200,269,000 171,791,000 164,986,000 183,192,000 128,769,000 145,692,000 133,714,000 123,910,000 101,188,000 102,934,000 
      dividends and distributions payable
    		123,259,000 172,732,000 172,674,000 172,486,000 172,191,000 172,172,000 172,154,000 171,176,000 171,916,000 171,465,000 171,427,000 170,643,000 170,952,000 170,937,000 170,869,000 169,859,000 169,739,000 169,718,000 171,003,000 171,082,000 171,070,000 171,077,000 171,026,000 170,713,000 165,421,000 165,419,000 165,352,000 165,114,000 165,118,000 139,263,000 139,218,000 139,040,000 130,434,000 130,432,000 130,418,000 113,038,000 113,071,000 113,079,000 327,320,000 112,912,000 112,892,000 112,796,000 882,472,000 112,708,000 112,420,000 114,799,000 497,242,000 112,470,000 112,425,000 110,886,000 110,488,000 93,461,000 93,353,000 92,615,000 91,901,000 83,584,000 83,369,000 83,019,000 81,031,000 81,068,000 80,865,000 80,756,000 80,536,000 80,463,000 80,475,000 97,547,000 97,162,000 96,491,000 96,451,000 105,150,000 944,870,000 96,152,000 96,192,000 105,284,000 857,892,000 
      accrued interest payable
    		120,128,000 120,975,000 120,432,000 128,098,000 121,360,000 112,107,000 119,573,000 133,684,000 128,422,000 111,088,000 114,400,000 103,774,000 91,885,000 96,821,000 90,861,000 94,796,000 87,408,000 107,386,000 76,675,000 106,288,000 88,826,000 95,274,000 82,388,000 90,016,000 83,177,000 89,289,000 89,171,000 89,267,000 92,809,000 96,844,000 96,176,000 83,646,000 99,100,000 85,172,000 266,714,000 234,628,000 222,175,000 221,578,000 190,386,000 200,916,000 178,548,000 186,630,000 163,532,000 181,954,000 156,024,000 178,651,000 167,523,000 181,310,000 141,676,000 99,491,000 72,461,000 98,601,000 61,947,000 97,997,000 69,105,000 89,555,000 62,046,000 88,070,000 62,327,000 84,689,000 80,521,000 69,166,000 76,058,000 49,536,000 66,463,000 50,329,000 67,132,000 48,705,000 55,979,000 47,355,000 54,487,000 46,671,000 59,105,000 48,917,000 47,441,000 
      bxp, inc.consolidated balance sheets
    		                                                                           
      other liabilities
    		406,820,000 416,838,000 450,165,000 450,796,000 407,441,000 398,525,000 417,978,000 445,947,000 380,014,000 418,813,000 465,276,000 450,918,000 417,255,000 401,360,000 396,283,000 391,441,000 370,403,000 370,990,000 399,965,000 412,084,000 369,932,000 373,281,000 366,852,000 387,994,000 356,338,000 355,984,000 369,575,000 503,726,000 468,433,000 462,869,000 470,140,000 443,980,000 419,215,000 452,608,000 446,489,000 461,079,000 508,952,000 498,290,000 483,601,000 448,680,000 448,480,000 483,762,000 502,255,000 517,428,000 539,716,000 556,772,000 578,969,000 567,464,000 556,730,000 316,683,000 324,613,000 309,004,000 308,354,000 324,826,000 293,515,000 244,555,000 231,702,000 210,392,000 213,000,000 104,914,000 95,423,000 115,755,000 127,538,000 131,193,000 126,560,000 133,662,000 173,750,000 167,646,000 187,104,000 221,432,000 232,705,000 198,314,000 201,406,000 229,666,000 239,084,000 
      total liabilities
    		18,482,700,000 17,766,779,000 17,577,740,000 18,137,324,000 18,123,230,000 17,184,205,000 17,240,265,000 17,833,785,000 16,698,784,000 17,048,845,000 16,313,339,000 15,837,237,000 15,326,635,000 15,115,833,000 14,422,944,000 14,322,462,000 14,785,286,000 13,960,103,000 14,084,526,000 14,511,681,000 14,458,573,000 14,447,628,000 13,402,961,000 13,262,304,000 13,285,727,000 13,247,608,000 12,331,317,000 12,042,509,000 11,931,524,000 11,747,921,000 11,399,849,000 11,269,777,000 11,208,823,000 11,208,410,000 11,044,189,000 10,930,646,000 11,065,746,000 11,246,040,000 10,492,529,000 10,917,504,000 11,019,279,000 11,073,970,000 11,878,506,000 11,721,440,000 11,762,849,000 11,825,385,000 12,967,712,000 12,611,391,000 12,569,374,000 9,608,937,000 9,619,033,000 9,345,416,000 9,523,357,000 8,641,505,000 9,313,798,000 8,540,985,000 8,492,017,000 8,490,362,000 8,328,418,000 7,915,091,000 7,663,109,000 7,130,209,000 7,223,992,000 6,499,359,000 6,455,103,000 6,594,607,000 6,781,751,000 6,589,291,000 6,026,615,000 6,030,538,000 6,869,920,000 5,884,119,000 6,100,215,000 6,221,194,000 5,848,288,000 
      commitments and contingencies
    		                                                                           
      redeemable deferred stock units— 107,696 and 128,227 units outstanding at redemption value at september 30, 2025 and december 31, 2024, respectively
    		8,006,000                                                                           
      equity:
    		                                                                           
      stockholders’ equity attributable to bxp, inc.:
    		                                                                           
      excess stock, 0.01 par value, 150,000,000 shares authorized, none issued or outstanding
    		                                                                           
      preferred stock, 0.01 par value, 50,000,000 shares authorized, none issued or outstanding
    		                                                                           
      common stock
    		1,584,000 1,584,000 1,583,000 1,582,000 1,580,000 1,571,000 1,570,000 1,569,000 1,569,000 1,569,000 1,568,000 1,568,000 1,568,000 1,567,000 1,567,000 1,565,000 1,562,000 1,561,000 1,561,000 1,557,000 1,556,000 1,556,000 1,553,000 1,548,000 1,546,000   1,545,000 1,544,000 1,544,000 1,544,000 1,543,000 1,543,000 1,543,000 1,538,000 1,538,000 1,537,000 1,536,000 1,536,000 1,536,000 1,535,000 1,534,000 1,531,000 1,531,000 1,531,000 1,530,000 1,530,000 1,524,000 1,524,000 1,516,000 1,516,000 1,509,000 1,507,000 1,494,000 1,481,000 1,476,000 1,464,000 1,451,000 1,402,000 1,401,000 1,393,000 1,390,000 1,389,000 1,387,000 1,385,000 1,213,000 1,212,000 1,199,000 1,198,000 1,197,000 1,195,000 1,193,000 1,190,000 1,190,000 1,175,000 
      additional paid-in capital
    		6,827,889,000 6,854,753,000 6,846,015,000 6,836,093,000 6,822,489,000 6,768,686,000 6,752,648,000 6,715,149,000 6,568,645,000 6,561,161,000 6,549,314,000 6,539,147,000 6,532,299,000 6,524,997,000 6,509,663,000 6,497,730,000 6,415,802,000 6,405,916,000 6,392,923,000 6,356,791,000 6,348,076,000 6,340,665,000 6,321,475,000 6,294,719,000 6,274,792,000   6,407,623,000 6,400,193,000 6,391,460,000 6,384,147,000 6,377,908,000 6,370,932,000 6,363,034,000 6,339,970,000 6,326,580,000 6,316,191,000 6,306,723,000 6,305,687,000 6,300,780,000 6,293,556,000 6,286,260,000 6,270,257,000 5,684,649,000 5,679,578,000 5,668,230,000 5,662,453,000 5,250,174,000 5,246,243,000 5,232,030,000 5,222,073,000 5,194,569,000 5,184,710,000 5,050,547,000 4,936,457,000 4,916,440,000 4,846,003,000 4,771,659,000 4,417,162,000 4,424,711,000 4,394,435,000 4,381,075,000 4,373,679,000 4,362,874,000 4,358,830,000 3,560,797,000 3,369,850,000 3,317,358,000 3,341,887,000 3,317,643,000 3,305,219,000 3,289,760,000 3,263,797,000 3,260,647,000 3,119,941,000 
      dividends in excess of earnings
    		-1,812,361,000 -1,579,770,000 -1,513,555,000 -1,419,575,000 -1,035,710,000 -964,518,000 -890,177,000 -816,152,000 -782,275,000 -516,550,000 -467,159,000 -391,356,000 -359,536,000 -567,016,000 -636,421,000 -625,891,000 -657,021,000 -612,247,000 -570,982,000 -509,653,000 -364,720,000 -302,511,000 -416,740,000 -760,523,000 -749,666,000   -675,534,000 -677,312,000 -649,747,000 -654,879,000 -712,343,000 -692,739,000 -694,320,000 -712,270,000 -725,522,000 -702,361,000 -699,048,000 -780,952,000 -627,054,000 -711,239,000 -690,993,000 -762,464,000 -148,566,000 -176,929,000 -153,979,000 -108,552,000   -160,697,000 -109,985,000 -59,621,000 -34,463,000 -70,609,000 -53,080,000 -72,941,000 -69,537,000 -56,479,000                  
      treasury common stock at cost, 78,900 shares at september 30, 2025 and december 31, 2024
    		-2,722,000                                                                           
      accumulated other comprehensive loss
    		-14,831,000 -15,059,000 -11,379,000 -2,072,000 -26,428,000 -155,000 -3,620,000 -21,147,000  -3,406,000 -18,214,000 -13,718,000 -15,991,000 -27,077,000 -28,485,000 -36,662,000 -40,803,000 -43,166,000 -45,139,000 -49,890,000 -52,622,000 -54,921,000 -55,700,000 -48,335,000 -51,996,000   -47,741,000 -45,137,000 -47,695,000 -49,062,000 -50,429,000 -51,796,000 -53,161,000 -50,983,000 -73,943,000 -79,748,000 -56,706,000 -14,114,000 -20,625,000  -11,907,000 -9,304,000 -9,866,000 -10,429,000 -10,989,000 -11,556,000 -12,122,000 -12,689,000 -13,253,000 -13,817,000 -14,379,000 -14,978,000 -15,558,000 -16,138,000 -16,717,000 -17,294,000 -17,867,000 -18,436,000 -19,530,000 -20,155,000 -21,145,000 -21,777,000 -22,411,000 -28,464,000 -29,202,000 -29,916,000 -37,445,000 -41,868,000 -53,091,000 -29,191,000 -6,342,000 -3,338,000 -3,239,000 -3,323,000 
      total stockholders’ equity attributable to bxp, inc.
    		4,999,559,000 5,258,786,000 5,319,942,000 5,413,306,000 5,759,209,000 5,802,862,000                                                                      
      noncontrolling interests:
    		                                                                           
      common units of boston properties limited partnership
    		554,440,000 584,651,000 591,555,000 591,270,000 638,129,000 677,789,000 684,969,000 666,580,000 656,587,000 689,123,000 691,627,000 683,583,000 685,952,000 660,214,000 649,602,000 642,655,000 609,830,000 615,308,000 620,106,000 616,596,000 634,796,000 640,491,000 636,572,000 600,860,000 603,690,000   619,352,000 618,380,000 621,221,000 619,347,000  605,802,000 604,997,000 617,252,000                                         
      property partnerships
    		1,954,777,000 2,003,993,000 1,938,344,000 1,933,545,000 1,874,272,000 1,801,676,000 1,734,904,000 1,640,704,000 1,588,906,000 1,557,368,000 1,552,070,000 1,547,317,000 1,551,501,000 1,552,706,000 1,548,455,000 1,556,553,000 1,728,101,000 1,725,343,000 1,725,600,000 1,726,933,000 1,730,674,000 1,724,588,000 1,736,445,000 1,728,689,000 1,720,123,000   1,711,445,000 1,711,028,000 1,699,181,000 1,685,715,000 1,683,760,000 1,668,675,000 1,653,981,000 1,529,653,000 1,525,042,000 1,552,937,000 1,563,912,000 1,574,400,000 1,590,808,000 1,590,481,000 1,599,502,000 1,602,467,000 716,565,000 721,096,000 725,093,000 726,132,000 481,629,000 489,389,000 8,273,000 -1,964,000 -1,852,000 -1,560,000 -1,267,000 -1,063,000 -996,000 -582,000 -585,000 -614,000 6,728,000 6,339,000 5,975,000 5,671,000 5,715,000 5,101,000 5,660,000          
      total equity
    		7,508,776,000 7,847,430,000 7,849,841,000 7,938,121,000 8,271,610,000 8,282,327,000 8,277,572,000 8,183,981,000 8,033,576,000 8,286,543,000 8,306,484,000 8,363,819,000 8,393,071,000 8,142,669,000 8,041,659,000 8,033,228,000 8,054,749,000 8,089,993,000 8,121,347,000 8,339,612,000 8,495,038,000 8,547,146,000 8,420,883,000 8,014,236,000 7,995,767,000   8,213,968,000 8,205,974,000 8,213,242,000 8,184,090,000 8,102,456,000 8,099,695,000 8,073,352,000 7,922,438,000 7,859,253,000 7,898,219,000 7,929,790,000 7,886,927,000 8,062,759,000 7,988,447,000 7,998,948,000 7,902,936,000 7,047,593,000 7,013,900,000 7,002,544,000 7,043,618,000 6,741,862,000 6,684,372,000 5,805,250,000 5,634,854,000 5,685,651,000 5,705,735,000 5,519,815,000 5,413,516,000 5,384,161,000 5,336,543,000 5,289,459,000 4,964,193,000 5,078,093,000 5,068,940,000 5,065,481,000 5,069,059,000 5,076,766,000 5,069,909,000 4,221,677,000          
      total liabilities and equity
    		25,999,482,000 25,621,190,000 25,436,521,000 26,084,980,000 26,405,536,000 25,474,448,000 25,525,978,000 26,026,149,000 24,739,148,000 25,341,680,000 24,625,422,000 24,207,669,000 23,726,691,000 23,266,433,000 22,475,634,000 22,365,258,000 22,848,810,000 22,059,076,000 22,213,552,000 22,858,190,000 22,959,215,000 23,000,777,000 21,829,698,000 21,284,905,000 21,288,575,000   20,256,477,000 20,137,498,000 19,961,163,000 19,583,939,000 19,372,233,000 19,308,518,000 19,281,762,000 18,966,627,000 18,789,899,000 18,963,965,000 19,175,830,000 18,379,456,000 18,980,263,000 19,113,959,000 19,179,071,000 19,886,767,000 18,875,160,000 18,898,533,000 18,979,568,000 20,162,251,000 19,519,708,000 19,462,784,000 15,623,279,000 15,462,321,000 15,141,943,000 15,280,629,000 14,212,857,000 14,782,966,000 13,980,798,000 13,884,212,000 13,835,473,000 13,348,263,000 13,048,836,000 12,787,701,000 12,251,342,000 12,348,703,000 11,631,777,000 11,580,664,000 10,871,936,000          
      redeemable deferred stock units— 103,473 and 128,227 units outstanding at redemption value at june 30, 2025 and december 31, 2024, respectively
    		 6,981,000                                                                          
      treasury common stock at cost, 78,900 shares at june 30, 2025 and december 31, 2024
    		 -2,722,000                                                                          
      redeemable deferred stock units— 133,051 and 128,227 units outstanding at redemption value at march 31, 2025 and december 31, 2024, respectively
    		  8,940,000                                                                         
      treasury common stock at cost, 78,900 shares at march 31, 2025 and december 31, 2024
    		  -2,722,000                                                                         
      redeemable deferred stock units— 128,227 and 119,471 units outstanding at redemption value at december 31, 2024 and december 31, 2023, respectively
    		   9,535,000                                                                        
      treasury common stock at cost, 78,900 shares at december 31, 2024 and december 31, 2023
    		   -2,722,000                                                                        
      redeemable deferred stock units— 132,930 and 119,471 units outstanding at redemption value at september 30, 2024 and december 31, 2023, respectively
    		    10,696,000                                                                       
      treasury common stock at cost, 78,900 shares at september 30, 2024 and december 31, 2023
    		    -2,722,000                                                                       
      related party note receivable
    		     88,779,000 88,789,000 88,779,000 88,807,000 88,834,000 78,544,000 78,576,000 78,592,000 78,576,000 78,544,000 78,336,000 78,144,000 77,872,000 77,640,000 77,552,000 77,592,000 78,520,000 78,800,000 80,000,000 80,000,000 80,000,000 80,000,000 80,000,000 80,000,000                             270,000,000 270,000,000 270,000,000 270,000,000 270,000,000 270,000,000 270,000,000 270,000,000 270,000,000 270,000,000 270,000,000 270,000,000 100,000,000      
      unsecured term loan
    		     698,776,000 1,199,430,000 1,198,301,000 1,197,173,000 1,196,046,000 1,194,916,000 730,000,000 730,000,000 728,795,000      499,390,000 499,270,000 499,150,000 499,058,000 498,939,000 498,819,000 498,700,000 498,607,000 498,488,000 498,368,000 498,248,000                                              
      redeemable deferred stock units— 128,584 and 119,471 units outstanding at redemption value at june 30, 2024 and december 31, 2023, respectively
    		     7,916,000                                                                      
      treasury common stock at cost, 78,900 shares at june 30, 2024 and december 31, 2023
    		     -2,722,000                                                                      
      boston properties, inc.consolidated balance sheets
    		                                                                           
      redeemable deferred stock units— 124,656 and 119,471 units outstanding at redemption value at march 31, 2024 and december 31, 2023, respectively
    		      8,141,000                                                                     
      stockholders’ equity attributable to boston properties, inc.:
    		                                                                           
      treasury common stock at cost, 78,900 shares at march 31, 2024 and december 31, 2023
    		      -2,722,000                                                                     
      total stockholders’ equity attributable to boston properties, inc.
    		      5,857,699,000 5,876,697,000 5,788,083,000 6,040,052,000 6,062,787,000 6,132,919,000 6,155,618,000 5,929,749,000 5,843,602,000 5,834,020,000 5,716,818,000 5,749,342,000 5,775,641,000 5,996,083,000 6,129,568,000 6,182,067,000 6,047,866,000 5,684,687,000 5,671,954,000   5,883,171,000 5,876,566,000 5,892,840,000 5,879,028,000 5,813,957,000 5,825,218,000 5,814,374,000 5,775,533,000 5,725,931,000 5,732,897,000 5,749,783,000 5,709,435,000 5,851,915,000 5,782,978,000 5,782,172,000 5,697,298,000 5,725,026,000 5,691,029,000 5,702,070,000 5,741,153,000 5,683,060,000 5,624,848,000 5,256,874,000 5,097,065,000 5,119,356,000 5,134,054,000 4,963,152,000 4,865,998,000 4,825,536,000 4,757,914,000 4,696,042,000 4,372,643,000 4,461,911,000 4,443,377,000 4,437,243,000 4,446,002,000 4,450,591,000 4,444,056,000 3,647,168,000          
      redeemable deferred stock units— 119,471 and 97,853 units outstanding at redemption value at december 31, 2023 and december 31, 2022, respectively
    		       8,383,000                                                                    
      treasury common stock at cost, 78,900 shares at december 31, 2023 and december 31, 2022
    		       -2,722,000                                                                    
      redeemable deferred stock units— 114,124 and 97,853 units outstanding at redemption value at september 30, 2023 and december 31, 2022, respectively
    		        6,788,000                                                                   
      treasury common stock at cost, 78,900 shares at september 30, 2023 and december 31, 2022
    		        -2,722,000                                                                   
      accumulated other comprehensive income
    		        2,866,000                                1,848,000                                   
      redeemable deferred stock units— 108,642 and 97,853 units outstanding at redemption value at june 30, 2023 and december 31, 2022, respectively
    		         6,292,000                                                                  
      treasury common stock at cost, 78,900 shares at june 30, 2023 and december 31, 2022
    		         -2,722,000                                                                  
      redeemable deferred stock units— 103,454 and 97,853 units outstanding at redemption value at march 31, 2023 and december 31, 2022, respectively
    		          5,599,000                                                                 
      treasury common stock at cost, 78,900 shares at march 31, 2023 and december 31, 2022
    		          -2,722,000                                                                 
      notes receivable
    		              9,674,000 9,641,000 19,297,000 19,087,000 18,891,000 18,729,000 25,304,000 25,480,000                                                      
      redeemable deferred stock units— 97,853 and 83,073 units outstanding at redemption value at december 31, 2022 and december 31, 2021, respectively
    		           6,613,000                                                                
      treasury common stock at cost, 78,900 shares at december 31, 2022 and december 31, 2021
    		           -2,722,000                                                                
      redeemable deferred stock units— 93,175 and 83,073 units outstanding at redemption value at september 30, 2022 and december 31, 2021, respectively
    		            6,985,000                                                               
      treasury common stock at cost, 78,900 shares at september 30, 2022 and december 31, 2021
    		            -2,722,000                                                               
      redeemable deferred stock units— 89,132 and 83,073 units outstanding at redemption value at june 30, 2022 and december 31, 2021, respectively
    		             7,931,000                                                              
      treasury common stock at cost, 78,900 shares at june 30, 2022 and december 31, 2021
    		             -2,722,000                                                              
      redeemable deferred stock units— 85,645 and 83,073 units outstanding at redemption value at march 31, 2022 and december 31, 2021, respectively
    		              11,031,000                                                             
      treasury common stock at cost, 78,900 shares at march 31, 2022 and december 31, 2021
    		              -2,722,000                                                             
      redeemable deferred stock units— 83,073 and 72,966 units outstanding at redemption value at december 31, 2021 and december 31, 2020, respectively
    		               9,568,000                                                            
      preferred stock, 0.01 par value, 50,000,000 shares authorized;
    		                                                                           
      5.25% series b cumulative redeemable preferred stock, 0.01 par value, liquidation preference 2,500 per share, 92,000 shares authorized, 80,000 shares issued and outstanding at december 31, 2020
    		                                                                           
      treasury common stock at cost, 78,900 shares at december 31, 2021 and december 31, 2020
    		               -2,722,000                                                            
      redeemable deferred stock units— 80,989 and 72,966 units outstanding at redemption value at september 30, 2021 and december 31, 2020, respectively
    		                8,775,000                                                           
      treasury common stock at cost, 78,900 shares at september 30, 2021 and december 31, 2020
    		                -2,722,000                                                           
      redeemable deferred stock units— 78,362 and 72,966 units outstanding at redemption value at june 30, 2021 and december 31, 2020, respectively
    		                 8,980,000                                                          
      treasury common stock at cost, 78,900 shares at june 30, 2021 and december 31, 2020
    		                 -2,722,000                                                          
      preferred stock redemption liability
    		                  200,000,000                                                         
      redeemable deferred stock units— 75,834 and 72,966 units outstanding at redemption value at march 31, 2021 and december 31, 2020, respectively
    		                  7,679,000                                                         
      treasury common stock at cost, 78,900 shares at march 31, 2021 and december 31, 2020
    		                  -2,722,000                                                         
      redeemable deferred stock units— 72,966 and 60,676 units outstanding at redemption value at december 31, 2020 and december 31, 2019, respectively
    		                   6,897,000                                                        
      5.25% series b cumulative redeemable preferred stock, 0.01 par value, liquidation preference 2,500 per share, 92,000 shares authorized, 80,000 shares issued and outstanding at december 31, 2020 and december 31, 2019
    		                   200,000,000                                                        
      treasury common stock at cost, 78,900 shares at december 31, 2020 and december 31, 2019
    		                   -2,722,000                                                        
      redeemable deferred stock units— 69,787 and 60,676 units outstanding at redemption value at september 30, 2020 and december 31, 2019, respectively
    		                    5,604,000                                                       
      5.25% series b cumulative redeemable preferred stock, 0.01 par value, liquidation preference 2,500 per share, 92,000 shares authorized, 80,000 shares issued and outstanding at september 30, 2020 and december 31, 2019
    		                    200,000,000                                                       
      treasury common stock at cost, 78,900 shares at september 30, 2020 and december 31, 2019
    		                    -2,722,000                                                       
      redeemable deferred stock units— 66,424 and 60,676 units outstanding at redemption value at june 30, 2020 and december 31, 2019, respectively
    		                     6,003,000                                                      
      5.25% series b cumulative redeemable preferred stock, 0.01 par value, liquidation preference 2,500 per share, 92,000 shares authorized, 80,000 shares issued and outstanding at june 30, 2020 and december 31, 2019
    		                     200,000,000                                                      
      treasury common stock at cost, 78,900 shares at june 30, 2020 and december 31, 2019
    		                     -2,722,000                                                      
      redeemable deferred stock units— 63,475 and 60,676 units outstanding at redemption value at march 31, 2020 and december 31, 2019, respectively
    		                      5,854,000                                                     
      5.25% series b cumulative redeemable preferred stock, 0.01 par value, liquidation preference 2,500 per share, 92,000 shares authorized, 80,000 shares issued and outstanding at march 31, 2020 and december 31, 2019
    		                      200,000,000                                                     
      treasury common stock at cost, 78,900 shares at march 31, 2020 and december 31, 2019
    		                      -2,722,000                                                     
      redeemable deferred stock units— 60,676 units outstanding at redemption value at december 31, 2019
    		                       8,365,000                                                    
      5.25% series b cumulative redeemable preferred stock, 0.01 par value, liquidation preference 2,500 per share, 92,000 shares authorized, 80,000 shares issued and outstanding at december 31, 2019 and december 31, 2018
    		                       200,000,000                                                    
      treasury common stock at cost, 78,900 shares at december 31, 2019 and december 31, 2018
    		                       -2,722,000                                                    
      redeemable deferred stock units—54,610 units outstanding at redemption value at september 30, 2019
    		                        7,081,000                                                   
      5.25% series b cumulative redeemable preferred stock, 0.01 par value, liquidation preference 2,500 per share, 92,000 shares authorized, 80,000 shares issued and outstanding at september 30, 2019 and december 31, 2018
    		                        200,000,000                                                   
      treasury common stock at cost, 78,900 shares at september 30, 2019 and december 31, 2018
    		                        -2,722,000                                                   
      5.25% series b cumulative redeemable preferred stock, 0.01 par value, liquidation preference 2,500 per share, 92,000 shares authorized, 80,000 shares issued and outstanding at december 31, 2018 and december 31, 2017
    		                           200,000,000                                                
      treasury common stock at cost, 78,900 shares at december 31, 2018 and december 31, 2017
    		                           -2,722,000                                                
      5.25% series b cumulative redeemable preferred stock, 0.01 par value, liquidation preference 2,500 per share, 92,000 shares authorized, 80,000 shares issued and outstanding at september 30, 2018 and december 31, 2017
    		                            200,000,000                                               
      treasury common stock at cost, 78,900 shares at september 30, 2018 and december 31, 2017
    		                            -2,722,000                                               
      5.25% series b cumulative redeemable preferred stock, 0.01 par value, liquidation preference 2,500 per share, 92,000 shares authorized, 80,000 shares issued and outstanding at june 30, 2018 and december 31, 2017
    		                             200,000,000                                              
      treasury common stock at cost, 78,900 shares at june 30, 2018 and december 31, 2017
    		                             -2,722,000                                              
      5.25% series b cumulative redeemable preferred stock, 0.01 par value, liquidation preference 2,500 per share, 92,000 shares authorized, 80,000 shares issued and outstanding at march 31, 2018 and december 31, 2017
    		                              200,000,000                                             
      treasury common stock at cost, 78,900 shares at march 31, 2018 and december 31, 2017
    		                              -2,722,000                                             
      less: accumulated depreciation (amounts related to vies of (854,172) and (758,640) at december 31, 2017 and 2016, respectively
    		                               -4,589,634,000                                            
      mezzanine notes payable
    		                                  306,734,000 307,448,000 307,797,000 308,142,000 308,482,000 308,817,000 309,148,000 309,475,000 309,796,000 310,114,000 310,427,000 310,735,000 311,040,000 311,340,000 311,637,000                           
      outside members’ notes payable
    		                                  180,000,000 180,000,000   180,000,000  180,000,000 180,000,000 180,000,000 180,000,000 180,000,000 180,000,000 180,000,000                             
      5.25% series b cumulative redeemable preferred stock, 0.01 par value, liquidation preference 2,500 per share, 92,000 shares authorized, 80,000 shares issued and outstanding at december 31, 2017 and december 31, 2016
    		                               200,000,000                                            
      treasury common stock at cost, 78,900 shares at december 31, 2017 and december 31, 2016
    		                               -2,722,000                                            
      common units of the operating partnership
    		                               604,739,000    608,280,000 612,385,000 616,095,000 603,092,000 620,036,000 614,988,000 617,274,000 603,171,000 606,002,000 601,775,000 575,381,000 576,333,000 577,173,000 570,135,000 540,103,000 539,753,000 568,147,000 573,241,000 557,930,000 548,581,000 559,621,000 579,211,000 594,002,000 592,164,000 609,454,000 619,224,000 622,263,000 617,386,000 620,460,000 620,752,000 568,849,000          
      5.25% series b cumulative redeemable preferred stock, 0.01 par value, liquidation preference 2,500 per share, 92,000 shares authorized, 80,000 shares issued and outstanding at september 30, 2017 and december 31, 2016
    		                                200,000,000                                           
      treasury common stock at cost, 78,900 shares at september 30, 2017 and december 31, 2016
    		                                -2,722,000                                           
      5.25% series b cumulative redeemable preferred stock, 0.01 par value, liquidation preference 2,500 per share, 92,000 shares authorized, 80,000 shares issued and outstanding at june 30, 2017 and december 31, 2016
    		                                 200,000,000                                          
      treasury common stock at cost, 78,900 shares at june 30, 2017 and december 31, 2016
    		                                 -2,722,000                                          
      5.25% series b cumulative redeemable preferred stock, 0.01 par value, liquidation preference 2,500 per share, 92,000 shares authorized, 80,000 shares issued and outstanding at march 31, 2017 and december 31, 2016
    		                                  200,000,000                                         
      treasury common stock at cost, 78,900 shares at march 31, 2017 and december 31, 2016
    		                                  -2,722,000                                         
      5.25% series b cumulative redeemable preferred stock, 0.01 par value, liquidation preference 2,500 per share, 92,000 shares authorized, 80,000 shares issued and outstanding at september 30, 2016 and december 31, 2015
    		                                   200,000,000                                        
      treasury common stock at cost, 78,900 shares at september 30, 2016 and december 31, 2015
    		                                   -2,722,000                                        
      construction in progress
    		                                    865,359,000 857,578,000  725,601,000 880,996,000 797,148,000  715,609,000 1,309,781,000 1,564,821,000  1,502,017,000 1,483,114,000 1,145,517,000  937,475,000 732,734,000 870,006,000                      
      land held for future development
    		                                    241,106,000 256,952,000  264,598,000 277,327,000 271,327,000  276,804,000 273,587,000 300,498,000  295,370,000 290,085,000 503,684,000  273,922,000 270,169,000 268,030,000  266,834,000 284,115,000 759,786,000  754,120,000 732,006,000 730,201,000  241,617,000 240,377,000 239,765,000  253,891,000 253,313,000 266,555,000  212,801,000 189,698,000 185,093,000  
      outside members' notes payable
    		                                    180,000,000 180,000,000  180,000,000                                    
      5.25% series b cumulative redeemable preferred stock, 0.01 par value, liquidation preference 2,500 per share, 92,000 shares authorized, 80,000 shares issued and outstanding at june 30, 2016 and december 31, 2015
    		                                    200,000,000                                       
      treasury common stock at cost, 78,900 shares at june 30, 2016 and december 31, 2015
    		                                    -2,722,000                                       
      5.25% series b cumulative redeemable preferred stock, 0.01 par value, liquidation preference 2,500 per share, 92,000 shares authorized, 80,000 shares issued and outstanding at march 31, 2016 and december 31, 2015
    		                                     200,000,000                                      
      treasury common stock at cost, 78,900 shares at march 31, 2016 and december 31, 2015
    		                                     -2,722,000                                      
      redeemable preferred units of the operating partnership
    		                                         633,000 633,000 2,022,000 18,006,000 51,312,000 51,312,000 67,806,000 110,876,000 110,876,000 110,876,000 110,876,000 51,537,000 51,537,000 55,652,000 55,652,000 55,652,000 55,652,000 55,652,000 55,652,000 55,652,000 55,652,000 55,652,000 55,652,000 55,652,000 55,652,000          
      redeemable interest in property partnership
    		                                        106,233,000 105,520,000 104,692,000 104,105,000 103,778,000 100,327,000 99,609,000 98,649,000 98,162,000 98,216,000 97,558,000                         
      excess stock, .01 par value, 150,000,000 shares authorized, none issued or outstanding
    		                                                                           
      preferred stock, .01 par value, 50,000,000 shares authorized;
    		                                                                           
      5.25% series b cumulative redeemable preferred stock, .01 par value, liquidation preference 2,500 per share, 92,000 shares authorized, 80,000 shares issued and outstanding at december 31, 2015 and december 31, 2014
    		                                      200,000,000                                     
      treasury common stock at cost, 78,900 shares at december 31, 2015 and december 31, 2014
    		                                      -2,722,000                                     
      5.25% series b cumulative redeemable preferred stock, .01 par value, liquidation preference 2,500 per share, 92,000 shares authorized, 80,000 shares issued and outstanding at september 30, 2015 and december 31, 2014
    		                                       200,000,000                                    
      treasury common stock at cost, 78,900 shares at september 30, 2015 and december 31, 2014
    		                                       -2,722,000                                    
      5.25% series b cumulative redeemable preferred stock, .01 par value, liquidation preference 2,500 per share, 92,000 shares authorized, 80,000 shares issued and outstanding at june 30, 2015 and december 31, 2014
    		                                        200,000,000                                   
      treasury common stock at cost, 78,900 shares at june 30, 2015 and december 31, 2014
    		                                        -2,722,000                                   
      5.25% series b cumulative redeemable preferred stock, .01 par value, liquidation preference 2,500 per share, 92,000 shares authorized, 80,000 shares issued and outstanding at march 31, 2015 and december 31, 2014
    		                                         200,000,000                                  
      treasury common stock at cost, 78,900 shares at march 31, 2015 and december 31, 2014
    		                                         -2,722,000                                  
      preferred stock, .01 par value, 50,000,000 shares authorized; 5.25% series b cumulative redeemable preferred stock, .01 par value, liquidation preference 2,500 per share, 92,000 shares authorized, 80,000 shares issued and outstanding at december 31, 2014 and december 31, 2013, respectively
    		                                          200,000,000                                 
      treasury common stock at cost, 78,900 shares at december 31, 2014 and december 31, 2013
    		                                          -2,722,000                                 
      5.25% series b cumulative redeemable preferred stock, .01 par value, liquidation preference 2,500 per share, 92,000 shares authorized, 80,000 shares issued and outstanding at september 30, 2014 and december 31, 2013
    		                                           200,000,000                                
      treasury common stock at cost, 78,900 shares at september 30, 2014 and december 31, 2013
    		                                           -2,722,000                                
      5.25% series b cumulative redeemable preferred stock, .01 par value, liquidation preference 2,500 per share, 92,000 shares authorized, 80,000 shares issued and outstanding at june 30, 2014 and december 31, 2013
    		                                            200,000,000                               
      treasury common stock at cost, 78,900 shares at june 30, 2014 and december 31, 2013
    		                                            -2,722,000                               
      5.25% series b cumulative redeemable preferred stock, .01 par value, liquidation preference 2,500 per share, 92,000 shares authorized, 80,000 shares issued and outstanding at march 31, 2014 and december 31, 2013
    		                                             200,000,000                              
      treasury common stock at cost, 78,900 shares at march 31, 2014 and december 31, 2013
    		                                             -2,722,000                              
      interest receivable from related party notes receivable
    		                                                 106,313,000 104,816,000 102,122,000 98,866,000 95,126,000 89,854,000                     
      preferred stock, .01 par value, 50,000,000 shares authorized; 5.25% series b cumulative redeemable preferred stock, .01 par value, liquidation preference 2,500 per share, 92,000 shares authorized, 80,000 and no shares issued and outstanding at december 31, 2013 and december 31, 2012, respectively
    		                                              200,000,000                             
      treasury common stock at cost, 78,900 shares at december 31, 2013 and december 31, 2012
    		                                              -2,722,000                             
      related party notes payable
    		                                               180,000,000 180,000,000                           
      5.25% series b cumulative redeemable preferred stock, .01 par value, liquidation preference 2,500 per share, 92,000 shares authorized, 80,000 and no shares issued and outstanding at september 30, 2013 and december 31, 2012, respectively
    		                                               200,000,000                            
      earnings
    		                                               246,206,000 192,492,000          -24,763,000                 
      treasury common stock at cost, 78,900 shares at september 30, 2013 and december 31, 2012
    		                                               -2,722,000                            
      5.25% series b cumulative redeemable preferred stock, .01 par value, liquidation preference 2,500 per share, 92,000 shares authorized, 80,000 and no shares issued and outstanding at june 30, 2013 and december 31, 2012, respectively
    		                                                200,000,000                           
      treasury common stock at cost, 78,900 shares at june 30, 2013 and december 31, 2012
    		                                                -2,722,000                           
      real estate held for sale
    		                                                 37,909,000                        18,282,000  
      5.25% series b cumulative redeemable preferred stock, .01 par value, liquidation preference 2,500 per share, 92,000 shares authorized, 80,000 and no shares issued and outstanding at march 31, 2013 and december 31, 2012, respectively
    		                                                 200,000,000                          
      treasury common stock at cost, 78,900 shares at march 31, 2013 and december 31, 2012
    		                                                 -2,722,000                          
      preferred stock, .01 par value, 50,000,000 shares authorized, none issued or outstanding
    		                                                                           
      treasury common stock at cost, 78,900 shares at december 31, 2012 and december 31, 2011
    		                                                  -2,722,000                         
      noncontrolling interest:
    		                                                                           
      treasury common stock at cost, 78,900 shares at september 30, 2012 and december 31, 2011
    		                                                   -2,722,000                        
      treasury common stock at cost, 78,900 shares at june 30, 2012 and december 31, 2011
    		                                                    -2,722,000                       
      treasury common stock at cost, 78,900 shares at march 31, 2012 and december 31, 2011
    		                                                     -2,722,000                      
      real estate, at cost:
    		                                                      13,389,472,000    12,764,935,000    11,099,558,000    10,618,344,000    10,249,895,000    9,552,458,000 
      stockholders’ equity attributable to boston properties, inc.
    		                                                                           
      treasury common stock at cost, 78,900 shares at december 31, 2011 and 2010
    		                                                      -2,722,000                     
      construction in process
    		                                                       899,302,000 982,318,000 681,342,000  1,003,508,000 632,731,000 662,809,000  976,758,000 934,397,000 916,220,000  813,404,000 735,372,000 619,165,000  629,138,000 584,620,000 500,995,000  
      interest receivable from related party note receivable
    		                                                       84,782,000 79,884,000 75,280,000                  
      treasury common stock at cost, 78,900 shares at september 30, 2011 and december 31, 2010
    		                                                       -2,722,000                    
      treasury common stock at cost, 78,900 shares at june 30, 2011 and december 31, 2010
    		                                                        -2,722,000                   
      treasury common stock at cost, 78,900 shares at march 31, 2011 and december 31, 2010
    		                                                         -2,722,000                  
      investment in securities
    		                                                          8,732,000    9,946,000    11,590,000    22,584,000     
      treasury common stock at cost, 78,900 shares in 2010 and 2009
    		                                                          -2,722,000 -2,722,000 -2,722,000 -2,722,000              
      earnings in excess of dividends
    		                                                           58,051,000 70,426,000 78,645,000 95,433,000 111,463,000 115,027,000 117,082,000 192,843,000 366,482,000 399,502,000 401,410,000 394,324,000 1,065,993,000 904,417,000 881,733,000 108,155,000 
      treasury common stock at cost, 78,900 shares in 2009 and 2008
    		                                                              -2,722,000 -2,722,000 -2,722,000 -2,722,000          
      liabilities and stockholders' equity
    		                                                                           
      minority interests
    		                                                                  598,627,000 639,171,000 663,313,000 654,512,000 653,892,000 753,620,000 731,043,000 726,937,000 623,508,000 
      stockholders' equity:
    		                                                                           
      treasury common stock at cost, 78,900 shares in 2008 and 2007
    		                                                                  -2,722,000 -2,722,000 -2,722,000 -2,722,000      
      total stockholders' equity
    		                                                                  3,531,267,000    3,668,825,000     
      total liabilities and stockholders' equity
    		                                                                  10,911,645,000    11,192,637,000     
      liabilities and stockholders’ equity
    		                                                                           
      stockholders’ equity:
    		                                                                           
      total stockholders’ equity
    		                                                                   3,644,872,000 3,697,997,000 3,664,437,000  4,347,882,000 4,163,344,000 4,137,609,000 3,223,226,000 
      total liabilities and stockholders’ equity
    		                                                                   10,873,334,000 10,387,925,000 10,349,487,000  10,985,621,000 10,994,602,000 11,085,740,000 9,695,022,000 
      treasury common stock at cost, 78,900 shares in 2007 and 2006
    		                                                                      -2,722,000 -2,722,000 -2,722,000 -2,722,000  
      treasury common stock at cost, 78,900 shares in 2006 and 2005
    		                                                                          -2,722,000 
    The information provided in this report is taken from www.sec.gov and many other data providers. While we have conducted our best efforts to ensure that the parsed data is accurate, we cannot guarantee its accuracy. Please use caution and understand that any consequences of its use are your own responsibility.