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Schedule III - Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation (Details) - USD ($)
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation        
Encumbrances $ 119,661,000      
Initial Costs        
Land 7,875,488,000      
Buildings & Improvements 10,606,121,000      
Costs Capitalized Subsequent to Acquisition        
Buildings & Improvements 18,136,921,000      
Total Costs        
Land 7,875,488,000      
Buildings & Improvements 28,743,042,000      
Total 36,618,530,000 [1] $ 34,299,503,000 $ 28,751,910,000 $ 21,274,810,000
Accumulated Depreciation (4,985,019,000) [2] $ (4,354,063,000) $ (3,771,241,000) $ (3,182,438,000)
Net Cost Basis 31,633,511,000      
Investment in Real Estate, Federal Income Tax Basis 36,100,000,000      
Investment in real estate over cost basis of real estate for federal income tax purpose $ 483,200,000      
Maximum | Buildings and building improvements        
Total Costs        
Estimated useful life 40 years      
Maximum | Land improvements        
Total Costs        
Estimated useful life 20 years      
North America        
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation        
Encumbrances $ 119,661,000      
Initial Costs        
Land 7,875,488,000      
Buildings & Improvements 10,606,121,000      
Costs Capitalized Subsequent to Acquisition        
Buildings & Improvements 18,132,709,000      
Total Costs        
Land 7,875,488,000      
Buildings & Improvements 28,738,830,000      
Total [1] 36,614,318,000      
Accumulated Depreciation [2] (4,980,807,000)      
Net Cost Basis 31,633,511,000      
Alexandria Center at Kendall Square        
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation        
Encumbrances 0      
Initial Costs        
Land 600,178,000      
Buildings & Improvements 926,555,000      
Costs Capitalized Subsequent to Acquisition        
Buildings & Improvements 1,947,990,000      
Total Costs        
Land 600,178,000      
Buildings & Improvements 2,874,545,000      
Total [1] 3,474,723,000      
Accumulated Depreciation [2] (503,555,000)      
Net Cost Basis 2,971,168,000      
Alexandria Center at One Kendall Square        
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation        
Encumbrances 0      
Initial Costs        
Land 405,164,000      
Buildings & Improvements 576,213,000      
Costs Capitalized Subsequent to Acquisition        
Buildings & Improvements 1,104,541,000      
Total Costs        
Land 405,164,000      
Buildings & Improvements 1,680,754,000      
Total [1] 2,085,918,000      
Accumulated Depreciation [2] (223,051,000)      
Net Cost Basis 1,862,867,000      
Alexandria Technology Square        
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation        
Encumbrances 0      
Initial Costs        
Land 0      
Buildings & Improvements 619,658,000      
Costs Capitalized Subsequent to Acquisition        
Buildings & Improvements 294,655,000      
Total Costs        
Land 0      
Buildings & Improvements 914,313,000      
Total [1] 914,313,000      
Accumulated Depreciation [2] (365,871,000)      
Net Cost Basis 548,442,000      
The Arsenal on the Charles        
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation        
Encumbrances 0      
Initial Costs        
Land 191,797,000      
Buildings & Improvements 354,611,000      
Costs Capitalized Subsequent to Acquisition        
Buildings & Improvements 651,853,000      
Total Costs        
Land 191,797,000      
Buildings & Improvements 1,006,464,000      
Total [1] 1,198,261,000      
Accumulated Depreciation [2] (75,217,000)      
Net Cost Basis 1,123,044,000      
480 Arsenal Way and 446, 458, 500, and 550 Arsenal Way        
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation        
Encumbrances 0      
Initial Costs        
Land 121,533,000      
Buildings & Improvements 24,464,000      
Costs Capitalized Subsequent to Acquisition        
Buildings & Improvements 133,339,000      
Total Costs        
Land 121,533,000      
Buildings & Improvements 157,803,000      
Total [1] 279,336,000      
Accumulated Depreciation [2] (70,773,000)      
Net Cost Basis 208,563,000      
99 Coolidge Avenue        
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation        
Encumbrances 119,042,000      
Initial Costs        
Land 43,125,000      
Buildings & Improvements 0      
Costs Capitalized Subsequent to Acquisition        
Buildings & Improvements 248,830,000      
Total Costs        
Land 43,125,000      
Buildings & Improvements 248,830,000      
Total [1] 291,955,000      
Accumulated Depreciation [2] (6,000)      
Net Cost Basis 291,949,000      
Alexandria Center for Life Science - Fenway        
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation        
Encumbrances 0      
Initial Costs        
Land 912,016,000      
Buildings & Improvements 617,552,000      
Costs Capitalized Subsequent to Acquisition        
Buildings & Improvements 534,106,000      
Total Costs        
Land 912,016,000      
Buildings & Improvements 1,151,658,000      
Total [1] 2,063,674,000      
Accumulated Depreciation [2] (58,969,000)      
Net Cost Basis 2,004,705,000      
5, 10, and 15 Necco Street        
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation        
Encumbrances 0      
Initial Costs        
Land 277,554,000      
Buildings & Improvements 55,897,000      
Costs Capitalized Subsequent to Acquisition        
Buildings & Improvements 356,438,000      
Total Costs        
Land 277,554,000      
Buildings & Improvements 412,335,000      
Total [1] 689,889,000      
Accumulated Depreciation [2] (7,416,000)      
Net Cost Basis 682,473,000      
One Moderna Way        
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation        
Encumbrances 0      
Initial Costs        
Land 67,329,000      
Buildings & Improvements 301,000,000      
Costs Capitalized Subsequent to Acquisition        
Buildings & Improvements 54,546,000      
Total Costs        
Land 67,329,000      
Buildings & Improvements 355,546,000      
Total [1] 422,875,000      
Accumulated Depreciation [2] (32,696,000)      
Net Cost Basis 390,179,000      
Alexandria Center for Life Science - Waltham        
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation        
Encumbrances 0      
Initial Costs        
Land 141,629,000      
Buildings & Improvements 513,901,000      
Costs Capitalized Subsequent to Acquisition        
Buildings & Improvements 242,869,000      
Total Costs        
Land 141,629,000      
Buildings & Improvements 756,770,000      
Total [1] 898,399,000      
Accumulated Depreciation [2] (21,848,000)      
Net Cost Basis 876,551,000      
19, 215, 225, and 235 Presidential Way        
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation        
Encumbrances 0      
Initial Costs        
Land 32,136,000      
Buildings & Improvements 118,391,000      
Costs Capitalized Subsequent to Acquisition        
Buildings & Improvements 27,603,000      
Total Costs        
Land 32,136,000      
Buildings & Improvements 145,994,000      
Total [1] 178,130,000      
Accumulated Depreciation [2] (32,179,000)      
Net Cost Basis 145,951,000      
Other - Greater Boston        
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation        
Encumbrances 0      
Initial Costs        
Land 171,265,000      
Buildings & Improvements 208,319,000      
Costs Capitalized Subsequent to Acquisition        
Buildings & Improvements 70,844,000      
Total Costs        
Land 171,265,000      
Buildings & Improvements 279,163,000      
Total [1] 450,428,000      
Accumulated Depreciation [2] (4,744,000)      
Net Cost Basis 445,684,000      
Alexandria Center for Science and Technology - Mission Bay        
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation        
Encumbrances 0      
Initial Costs        
Land 213,014,000      
Buildings & Improvements 218,556,000      
Costs Capitalized Subsequent to Acquisition        
Buildings & Improvements 668,907,000      
Total Costs        
Land 213,014,000      
Buildings & Improvements 887,463,000      
Total [1] 1,100,477,000      
Accumulated Depreciation [2] (233,274,000)      
Net Cost Basis 867,203,000      
Alexandria Technology Center - Gateway        
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation        
Encumbrances 0      
Initial Costs        
Land 193,004,000      
Buildings & Improvements 364,078,000      
Costs Capitalized Subsequent to Acquisition        
Buildings & Improvements 702,904,000      
Total Costs        
Land 193,004,000      
Buildings & Improvements 1,066,982,000      
Total [1] 1,259,986,000      
Accumulated Depreciation [2] (171,828,000)      
Net Cost Basis 1,088,158,000      
Alexandria Center for Life Science – Millbrae        
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation        
Encumbrances 0      
Initial Costs        
Land 69,989,000      
Buildings & Improvements 0      
Costs Capitalized Subsequent to Acquisition        
Buildings & Improvements 311,759,000      
Total Costs        
Land 69,989,000      
Buildings & Improvements 311,759,000      
Total [1] 381,748,000      
Accumulated Depreciation [2] 0      
Net Cost Basis 381,748,000      
Alexandria Center for Advanced Technologies - South San Francisco        
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation        
Encumbrances 0      
Initial Costs        
Land 59,199,000      
Buildings & Improvements 0      
Costs Capitalized Subsequent to Acquisition        
Buildings & Improvements 546,295,000      
Total Costs        
Land 59,199,000      
Buildings & Improvements 546,295,000      
Total [1] 605,494,000      
Accumulated Depreciation [2] (135,948,000)      
Net Cost Basis 469,546,000      
Alexandria Center for Advanced Technologies - Tanforan        
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation        
Encumbrances 0      
Initial Costs        
Land 330,154,000      
Buildings & Improvements 51,145,000      
Costs Capitalized Subsequent to Acquisition        
Buildings & Improvements 51,161,000      
Total Costs        
Land 330,154,000      
Buildings & Improvements 102,306,000      
Total [1] 432,460,000      
Accumulated Depreciation [2] (11,051,000)      
Net Cost Basis 421,409,000      
Alexandria Center for Life Science - South San Francisco        
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation        
Encumbrances 0      
Initial Costs        
Land 32,245,000      
Buildings & Improvements 1,287,000      
Costs Capitalized Subsequent to Acquisition        
Buildings & Improvements 480,347,000      
Total Costs        
Land 32,245,000      
Buildings & Improvements 481,634,000      
Total [1] 513,879,000      
Accumulated Depreciation [2] (139,392,000)      
Net Cost Basis 374,487,000      
500 Forbes Boulevard        
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation        
Encumbrances 0      
Initial Costs        
Land 35,596,000      
Buildings & Improvements 69,091,000      
Costs Capitalized Subsequent to Acquisition        
Buildings & Improvements 22,148,000      
Total Costs        
Land 35,596,000      
Buildings & Improvements 91,239,000      
Total [1] 126,835,000      
Accumulated Depreciation [2] (35,880,000)      
Net Cost Basis 90,955,000      
Alexandria Center for Life Science - San Carlos        
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation        
Encumbrances 0      
Initial Costs        
Land 433,634,000      
Buildings & Improvements 28,323,000      
Costs Capitalized Subsequent to Acquisition        
Buildings & Improvements 717,671,000      
Total Costs        
Land 433,634,000      
Buildings & Improvements 745,994,000      
Total [1] 1,179,628,000      
Accumulated Depreciation [2] (86,306,000)      
Net Cost Basis 1,093,322,000      
3825 and 3875 Fabian Way        
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation        
Encumbrances 0      
Initial Costs        
Land 194,424,000      
Buildings & Improvements 54,519,000      
Costs Capitalized Subsequent to Acquisition        
Buildings & Improvements 14,737,000      
Total Costs        
Land 194,424,000      
Buildings & Improvements 69,256,000      
Total [1] 263,680,000      
Accumulated Depreciation [2] (11,583,000)      
Net Cost Basis 252,097,000      
Alexandria Stanford Life Science District        
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation        
Encumbrances 0      
Initial Costs        
Land 0      
Buildings & Improvements 599,401,000      
Costs Capitalized Subsequent to Acquisition        
Buildings & Improvements 115,138,000      
Total Costs        
Land 0      
Buildings & Improvements 714,539,000      
Total [1] 714,539,000      
Accumulated Depreciation [2] (62,305,000)      
Net Cost Basis 652,234,000      
3412, 3420, 3440, 3450, and 3460 Hillview Avenue        
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation        
Encumbrances 0      
Initial Costs        
Land 0      
Buildings & Improvements 304,318,000      
Costs Capitalized Subsequent to Acquisition        
Buildings & Improvements 88,966,000      
Total Costs        
Land 0      
Buildings & Improvements 393,284,000      
Total [1] 393,284,000      
Accumulated Depreciation [2] (19,647,000)      
Net Cost Basis 373,637,000      
2100, 2200, 2300, and 2400 Geng Road        
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation        
Encumbrances 0      
Initial Costs        
Land 72,859,000      
Buildings & Improvements 53,309,000      
Costs Capitalized Subsequent to Acquisition        
Buildings & Improvements 35,856,000      
Total Costs        
Land 72,859,000      
Buildings & Improvements 89,165,000      
Total [1] 162,024,000      
Accumulated Depreciation [2] (19,554,000)      
Net Cost Basis 142,470,000      
2475 and 2625/2627/2631 Hanover Street and 1450 Page Mill Road        
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation        
Encumbrances 0      
Initial Costs        
Land 0      
Buildings & Improvements 187,472,000      
Costs Capitalized Subsequent to Acquisition        
Buildings & Improvements 12,988,000      
Total Costs        
Land 0      
Buildings & Improvements 200,460,000      
Total [1] 200,460,000      
Accumulated Depreciation [2] (33,645,000)      
Net Cost Basis 166,815,000      
2425 Garcia Avenue & 2450 Bayshore Parkway        
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation        
Encumbrances 619,000      
Initial Costs        
Land 1,512,000      
Buildings & Improvements 21,323,000      
Costs Capitalized Subsequent to Acquisition        
Buildings & Improvements 26,281,000      
Total Costs        
Land 1,512,000      
Buildings & Improvements 47,604,000      
Total [1] 49,116,000      
Accumulated Depreciation [2] (27,833,000)      
Net Cost Basis 21,283,000      
3350 West Bayshore Road        
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation        
Encumbrances 0      
Initial Costs        
Land 4,800,000      
Buildings & Improvements 6,693,000      
Costs Capitalized Subsequent to Acquisition        
Buildings & Improvements 45,079,000      
Total Costs        
Land 4,800,000      
Buildings & Improvements 51,772,000      
Total [1] 56,572,000      
Accumulated Depreciation [2] (13,221,000)      
Net Cost Basis 43,351,000      
901 California Avenue        
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation        
Encumbrances 0      
Initial Costs        
Land 0      
Buildings & Improvements 0      
Costs Capitalized Subsequent to Acquisition        
Buildings & Improvements 16,419,000      
Total Costs        
Land 0      
Buildings & Improvements 16,419,000      
Total [1] 16,419,000      
Accumulated Depreciation [2] 0      
Net Cost Basis 16,419,000      
88 Bluxome Street        
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation        
Encumbrances 0      
Initial Costs        
Land 148,551,000      
Buildings & Improvements 21,514,000      
Costs Capitalized Subsequent to Acquisition        
Buildings & Improvements 208,770,000      
Total Costs        
Land 148,551,000      
Buildings & Improvements 230,284,000      
Total [1] 378,835,000      
Accumulated Depreciation [2] (23,098,000)      
Net Cost Basis 355,737,000      
Alexandria Center for Life Science - New York City        
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation        
Encumbrances 0      
Initial Costs        
Land 0      
Buildings & Improvements 0      
Costs Capitalized Subsequent to Acquisition        
Buildings & Improvements 1,102,566,000      
Total Costs        
Land 0      
Buildings & Improvements 1,102,566,000      
Total [1] 1,102,566,000      
Accumulated Depreciation [2] (294,190,000)      
Net Cost Basis 808,376,000      
Alexandria Center for Life Science - Long Island City        
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation        
Encumbrances 0      
Initial Costs        
Land 22,746,000      
Buildings & Improvements 53,093,000      
Costs Capitalized Subsequent to Acquisition        
Buildings & Improvements 158,719,000      
Total Costs        
Land 22,746,000      
Buildings & Improvements 211,812,000      
Total [1] 234,558,000      
Accumulated Depreciation [2] (7,486,000)      
Net Cost Basis 227,072,000      
One Alexandria Square        
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation        
Encumbrances 0      
Initial Costs        
Land 139,608,000      
Buildings & Improvements 161,293,000      
Costs Capitalized Subsequent to Acquisition        
Buildings & Improvements 673,079,000      
Total Costs        
Land 139,608,000      
Buildings & Improvements 834,372,000      
Total [1] 973,980,000      
Accumulated Depreciation [2] (236,264,000)      
Net Cost Basis 737,716,000      
One Alexandria North        
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation        
Encumbrances 0      
Initial Costs        
Land 103,937,000      
Buildings & Improvements 1,354,000      
Costs Capitalized Subsequent to Acquisition        
Buildings & Improvements 37,971,000      
Total Costs        
Land 103,937,000      
Buildings & Improvements 39,325,000      
Total [1] 143,262,000      
Accumulated Depreciation [2] (1,359,000)      
Net Cost Basis 141,903,000      
ARE Torrey Ridge        
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation        
Encumbrances 0      
Initial Costs        
Land 22,124,000      
Buildings & Improvements 152,840,000      
Costs Capitalized Subsequent to Acquisition        
Buildings & Improvements 85,391,000      
Total Costs        
Land 22,124,000      
Buildings & Improvements 238,231,000      
Total [1] 260,355,000      
Accumulated Depreciation [2] (71,018,000)      
Net Cost Basis 189,337,000      
ARE Nautilus        
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation        
Encumbrances 0      
Initial Costs        
Land 6,684,000      
Buildings & Improvements 27,600,000      
Costs Capitalized Subsequent to Acquisition        
Buildings & Improvements 134,110,000      
Total Costs        
Land 6,684,000      
Buildings & Improvements 161,710,000      
Total [1] 168,394,000      
Accumulated Depreciation [2] (70,628,000)      
Net Cost Basis 97,766,000      
Campus Point by Alexandria        
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation        
Encumbrances 0      
Initial Costs        
Land 200,556,000      
Buildings & Improvements 396,739,000      
Costs Capitalized Subsequent to Acquisition        
Buildings & Improvements 703,166,000      
Total Costs        
Land 200,556,000      
Buildings & Improvements 1,099,905,000      
Total [1] 1,300,461,000      
Accumulated Depreciation [2] (218,886,000)      
Net Cost Basis 1,081,575,000      
5200 Illumina Way        
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation        
Encumbrances 0      
Initial Costs        
Land 39,051,000      
Buildings & Improvements 96,606,000      
Costs Capitalized Subsequent to Acquisition        
Buildings & Improvements 200,141,000      
Total Costs        
Land 39,051,000      
Buildings & Improvements 296,747,000      
Total [1] 335,798,000      
Accumulated Depreciation [2] (81,880,000)      
Net Cost Basis 253,918,000      
ARE Esplanade        
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation        
Encumbrances 0      
Initial Costs        
Land 9,682,000      
Buildings & Improvements 29,991,000      
Costs Capitalized Subsequent to Acquisition        
Buildings & Improvements 117,777,000      
Total Costs        
Land 9,682,000      
Buildings & Improvements 147,768,000      
Total [1] 157,450,000      
Accumulated Depreciation [2] (54,787,000)      
Net Cost Basis 102,663,000      
ARE Towne Centre        
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation        
Encumbrances 0      
Initial Costs        
Land 853,000      
Buildings & Improvements 5,101,000      
Costs Capitalized Subsequent to Acquisition        
Buildings & Improvements 60,536,000      
Total Costs        
Land 853,000      
Buildings & Improvements 65,637,000      
Total [1] 66,490,000      
Accumulated Depreciation [2] (48,747,000)      
Net Cost Basis 17,743,000      
9625 Towne Centre Drive        
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation        
Encumbrances 0      
Initial Costs        
Land 7,686,000      
Buildings & Improvements 14,586,000      
Costs Capitalized Subsequent to Acquisition        
Buildings & Improvements 65,762,000      
Total Costs        
Land 7,686,000      
Buildings & Improvements 80,348,000      
Total [1] 88,034,000      
Accumulated Depreciation [2] (22,945,000)      
Net Cost Basis 65,089,000      
Costa Verde By Alexandria        
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation        
Encumbrances 0      
Initial Costs        
Land 124,070,000      
Buildings & Improvements 0      
Costs Capitalized Subsequent to Acquisition        
Buildings & Improvements 26,487,000      
Total Costs        
Land 124,070,000      
Buildings & Improvements 26,487,000      
Total [1] 150,557,000      
Accumulated Depreciation [2] (476,000)      
Net Cost Basis 150,081,000      
SD Tech by Alexandria        
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation        
Encumbrances 0      
Initial Costs        
Land 81,428,000      
Buildings & Improvements 254,069,000      
Costs Capitalized Subsequent to Acquisition        
Buildings & Improvements 438,643,000      
Total Costs        
Land 81,428,000      
Buildings & Improvements 692,712,000      
Total [1] 774,140,000      
Accumulated Depreciation [2] (47,000,000)      
Net Cost Basis 727,140,000      
Sequence District by Alexandria        
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation        
Encumbrances 0      
Initial Costs        
Land 163,610,000      
Buildings & Improvements 281,389,000      
Costs Capitalized Subsequent to Acquisition        
Buildings & Improvements 30,101,000      
Total Costs        
Land 163,610,000      
Buildings & Improvements 311,490,000      
Total [1] 475,100,000      
Accumulated Depreciation [2] (19,262,000)      
Net Cost Basis 455,838,000      
Pacific Technology Park        
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation        
Encumbrances 0      
Initial Costs        
Land 96,796,000      
Buildings & Improvements 66,660,000      
Costs Capitalized Subsequent to Acquisition        
Buildings & Improvements 27,088,000      
Total Costs        
Land 96,796,000      
Buildings & Improvements 93,748,000      
Total [1] 190,544,000      
Accumulated Depreciation [2] (5,903,000)      
Net Cost Basis 184,641,000      
Summers Ridge Science Park        
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation        
Encumbrances 0      
Initial Costs        
Land 21,154,000      
Buildings & Improvements 102,046,000      
Costs Capitalized Subsequent to Acquisition        
Buildings & Improvements 4,782,000      
Total Costs        
Land 21,154,000      
Buildings & Improvements 106,828,000      
Total [1] 127,982,000      
Accumulated Depreciation [2] (16,796,000)      
Net Cost Basis 111,186,000      
Scripps Science Park by Alexandria        
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation        
Encumbrances 0      
Initial Costs        
Land 79,451,000      
Buildings & Improvements 59,343,000      
Costs Capitalized Subsequent to Acquisition        
Buildings & Improvements 98,047,000      
Total Costs        
Land 79,451,000      
Buildings & Improvements 157,390,000      
Total [1] 236,841,000      
Accumulated Depreciation [2] (4,557,000)      
Net Cost Basis 232,284,000      
ARE Portola        
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation        
Encumbrances 0      
Initial Costs        
Land 6,991,000      
Buildings & Improvements 25,153,000      
Costs Capitalized Subsequent to Acquisition        
Buildings & Improvements 41,147,000      
Total Costs        
Land 6,991,000      
Buildings & Improvements 66,300,000      
Total [1] 73,291,000      
Accumulated Depreciation [2] (24,464,000)      
Net Cost Basis 48,827,000      
5810/5820 Nancy Ridge Drive        
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation        
Encumbrances 0      
Initial Costs        
Land 3,492,000      
Buildings & Improvements 18,285,000      
Costs Capitalized Subsequent to Acquisition        
Buildings & Improvements 33,468,000      
Total Costs        
Land 3,492,000      
Buildings & Improvements 51,753,000      
Total [1] 55,245,000      
Accumulated Depreciation [2] (16,763,000)      
Net Cost Basis 38,482,000      
9877 Waples Street        
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation        
Encumbrances 0      
Initial Costs        
Land 5,092,000      
Buildings & Improvements 11,908,000      
Costs Capitalized Subsequent to Acquisition        
Buildings & Improvements 13,289,000      
Total Costs        
Land 5,092,000      
Buildings & Improvements 25,197,000      
Total [1] 30,289,000      
Accumulated Depreciation [2] (4,101,000)      
Net Cost Basis 26,188,000      
5871 Oberlin Drive        
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation        
Encumbrances 0      
Initial Costs        
Land 1,349,000      
Buildings & Improvements 8,016,000      
Costs Capitalized Subsequent to Acquisition        
Buildings & Improvements 20,511,000      
Total Costs        
Land 1,349,000      
Buildings & Improvements 28,527,000      
Total [1] 29,876,000      
Accumulated Depreciation [2] (5,174,000)      
Net Cost Basis 24,702,000      
3911, 3931, 3985, 4025, 4031, 4045, and 4075 Sorrento Valley Boulevard        
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation        
Encumbrances 0      
Initial Costs        
Land 18,177,000      
Buildings & Improvements 42,723,000      
Costs Capitalized Subsequent to Acquisition        
Buildings & Improvements 38,176,000      
Total Costs        
Land 18,177,000      
Buildings & Improvements 80,899,000      
Total [1] 99,076,000      
Accumulated Depreciation [2] (42,904,000)      
Net Cost Basis 56,172,000      
11045 and 11055 Roselle Street        
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation        
Encumbrances 0      
Initial Costs        
Land 1,386,000      
Buildings & Improvements 4,288,000      
Costs Capitalized Subsequent to Acquisition        
Buildings & Improvements 33,803,000      
Total Costs        
Land 1,386,000      
Buildings & Improvements 38,091,000      
Total [1] 39,477,000      
Accumulated Depreciation [2] (10,414,000)      
Net Cost Basis 29,063,000      
Other - San Diego        
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation        
Encumbrances 0      
Initial Costs        
Land 104,737,000      
Buildings & Improvements 70,212,000      
Costs Capitalized Subsequent to Acquisition        
Buildings & Improvements 65,226,000      
Total Costs        
Land 104,737,000      
Buildings & Improvements 135,438,000      
Total [1] 240,175,000      
Accumulated Depreciation [2] (15,492,000)      
Net Cost Basis 224,683,000      
The Eastlake Life Science Campus by Alexandria        
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation        
Encumbrances 0      
Initial Costs        
Land 47,230,000      
Buildings & Improvements 83,012,000      
Costs Capitalized Subsequent to Acquisition        
Buildings & Improvements 1,017,765,000      
Total Costs        
Land 47,230,000      
Buildings & Improvements 1,100,777,000      
Total [1] 1,148,007,000      
Accumulated Depreciation [2] (235,838,000)      
Net Cost Basis 912,169,000      
Alexandria Center for Life Science - South Lake Union        
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation        
Encumbrances 0      
Initial Costs        
Land 229,607,000      
Buildings & Improvements 1,128,000      
Costs Capitalized Subsequent to Acquisition        
Buildings & Improvements 425,392,000      
Total Costs        
Land 229,607,000      
Buildings & Improvements 426,520,000      
Total [1] 656,127,000      
Accumulated Depreciation [2] (51,917,000)      
Net Cost Basis 604,210,000      
219 Terry Avenue North        
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation        
Encumbrances 0      
Initial Costs        
Land 1,819,000      
Buildings & Improvements 2,302,000      
Costs Capitalized Subsequent to Acquisition        
Buildings & Improvements 20,898,000      
Total Costs        
Land 1,819,000      
Buildings & Improvements 23,200,000      
Total [1] 25,019,000      
Accumulated Depreciation [2] (9,827,000)      
Net Cost Basis 15,192,000      
830 and 1010 4th Avenue South        
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation        
Encumbrances 0      
Initial Costs        
Land 52,700,000      
Buildings & Improvements 12,062,000      
Costs Capitalized Subsequent to Acquisition        
Buildings & Improvements 15,016,000      
Total Costs        
Land 52,700,000      
Buildings & Improvements 27,078,000      
Total [1] 79,778,000      
Accumulated Depreciation [2] (1,073,000)      
Net Cost Basis 78,705,000      
3000/3018 Western Avenue        
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation        
Encumbrances 0      
Initial Costs        
Land 1,432,000      
Buildings & Improvements 7,497,000      
Costs Capitalized Subsequent to Acquisition        
Buildings & Improvements 24,890,000      
Total Costs        
Land 1,432,000      
Buildings & Improvements 32,387,000      
Total [1] 33,819,000      
Accumulated Depreciation [2] (28,629,000)      
Net Cost Basis 5,190,000      
410 West Harrison/410 Elliott Avenue West        
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation        
Encumbrances 0      
Initial Costs        
Land 3,857,000      
Buildings & Improvements 1,989,000      
Costs Capitalized Subsequent to Acquisition        
Buildings & Improvements 20,434,000      
Total Costs        
Land 3,857,000      
Buildings & Improvements 22,423,000      
Total [1] 26,280,000      
Accumulated Depreciation [2] (10,200,000)      
Net Cost Basis 16,080,000      
Alexandria Center for Advanced Technologies - Canyon Park        
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation        
Encumbrances 0      
Initial Costs        
Land 117,302,000      
Buildings & Improvements 182,213,000      
Costs Capitalized Subsequent to Acquisition        
Buildings & Improvements 26,146,000      
Total Costs        
Land 117,302,000      
Buildings & Improvements 208,359,000      
Total [1] 325,661,000      
Accumulated Depreciation [2] (13,803,000)      
Net Cost Basis 311,858,000      
Alexandria Center for Advanced Technologies - Monte Villa Parkway        
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation        
Encumbrances 0      
Initial Costs        
Land 52,464,000      
Buildings & Improvements 64,753,000      
Costs Capitalized Subsequent to Acquisition        
Buildings & Improvements 80,630,000      
Total Costs        
Land 52,464,000      
Buildings & Improvements 145,383,000      
Total [1] 197,847,000      
Accumulated Depreciation [2] (2,772,000)      
Net Cost Basis 195,075,000      
Other - Seattle        
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation        
Encumbrances 0      
Initial Costs        
Land 78,900,000      
Buildings & Improvements 931,000      
Costs Capitalized Subsequent to Acquisition        
Buildings & Improvements 24,453,000      
Total Costs        
Land 78,900,000      
Buildings & Improvements 25,384,000      
Total [1] 104,284,000      
Accumulated Depreciation [2] (942,000)      
Net Cost Basis 103,342,000      
Alexandria Center for Life Science - Shady Grove        
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation        
Encumbrances 0      
Initial Costs        
Land 85,365,000      
Buildings & Improvements 253,567,000      
Costs Capitalized Subsequent to Acquisition        
Buildings & Improvements 653,805,000      
Total Costs        
Land 85,365,000      
Buildings & Improvements 907,372,000      
Total [1] 992,737,000      
Accumulated Depreciation [2] (148,111,000)      
Net Cost Basis 844,626,000      
1330 Piccard Drive        
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation        
Encumbrances 0      
Initial Costs        
Land 2,800,000      
Buildings & Improvements 11,533,000      
Costs Capitalized Subsequent to Acquisition        
Buildings & Improvements 37,915,000      
Total Costs        
Land 2,800,000      
Buildings & Improvements 49,448,000      
Total [1] 52,248,000      
Accumulated Depreciation [2] (25,154,000)      
Net Cost Basis 27,094,000      
1405 Research Boulevard        
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation        
Encumbrances 0      
Initial Costs        
Land 899,000      
Buildings & Improvements 21,946,000      
Costs Capitalized Subsequent to Acquisition        
Buildings & Improvements 15,818,000      
Total Costs        
Land 899,000      
Buildings & Improvements 37,764,000      
Total [1] 38,663,000      
Accumulated Depreciation [2] (19,356,000)      
Net Cost Basis 19,307,000      
1500 and 1550 East Gude Drive        
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation        
Encumbrances 0      
Initial Costs        
Land 1,523,000      
Buildings & Improvements 7,731,000      
Costs Capitalized Subsequent to Acquisition        
Buildings & Improvements 10,709,000      
Total Costs        
Land 1,523,000      
Buildings & Improvements 18,440,000      
Total [1] 19,963,000      
Accumulated Depreciation [2] (11,916,000)      
Net Cost Basis 8,047,000      
5 Research Place        
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation        
Encumbrances 0      
Initial Costs        
Land 1,466,000      
Buildings & Improvements 5,708,000      
Costs Capitalized Subsequent to Acquisition        
Buildings & Improvements 31,235,000      
Total Costs        
Land 1,466,000      
Buildings & Improvements 36,943,000      
Total [1] 38,409,000      
Accumulated Depreciation [2] (19,450,000)      
Net Cost Basis 18,959,000      
5 Research Court        
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation        
Encumbrances 0      
Initial Costs        
Land 1,647,000      
Buildings & Improvements 13,258,000      
Costs Capitalized Subsequent to Acquisition        
Buildings & Improvements 24,110,000      
Total Costs        
Land 1,647,000      
Buildings & Improvements 37,368,000      
Total [1] 39,015,000      
Accumulated Depreciation [2] (18,805,000)      
Net Cost Basis 20,210,000      
12301 Parklawn Drive        
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation        
Encumbrances 0      
Initial Costs        
Land 1,476,000      
Buildings & Improvements 7,267,000      
Costs Capitalized Subsequent to Acquisition        
Buildings & Improvements 1,734,000      
Total Costs        
Land 1,476,000      
Buildings & Improvements 9,001,000      
Total [1] 10,477,000      
Accumulated Depreciation [2] (4,096,000)      
Net Cost Basis 6,381,000      
Alexandria Technology Center - Gaithersburg I        
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation        
Encumbrances 0      
Initial Costs        
Land 20,980,000      
Buildings & Improvements 121,952,000      
Costs Capitalized Subsequent to Acquisition        
Buildings & Improvements 56,847,000      
Total Costs        
Land 20,980,000      
Buildings & Improvements 178,799,000      
Total [1] 199,779,000      
Accumulated Depreciation [2] (60,439,000)      
Net Cost Basis 139,340,000      
Alexandria Technology Center - Gaithersburg II        
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation        
Encumbrances 0      
Initial Costs        
Land 17,134,000      
Buildings & Improvements 67,825,000      
Costs Capitalized Subsequent to Acquisition        
Buildings & Improvements 108,021,000      
Total Costs        
Land 17,134,000      
Buildings & Improvements 175,846,000      
Total [1] 192,980,000      
Accumulated Depreciation [2] (47,157,000)      
Net Cost Basis 145,823,000      
20400 Century Boulevard        
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation        
Encumbrances 0      
Initial Costs        
Land 3,641,000      
Buildings & Improvements 4,759,000      
Costs Capitalized Subsequent to Acquisition        
Buildings & Improvements 26,397,000      
Total Costs        
Land 3,641,000      
Buildings & Improvements 31,156,000      
Total [1] 34,797,000      
Accumulated Depreciation [2] (3,667,000)      
Net Cost Basis 31,130,000      
401 Professional Drive        
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation        
Encumbrances 0      
Initial Costs        
Land 1,129,000      
Buildings & Improvements 6,941,000      
Costs Capitalized Subsequent to Acquisition        
Buildings & Improvements 11,666,000      
Total Costs        
Land 1,129,000      
Buildings & Improvements 18,607,000      
Total [1] 19,736,000      
Accumulated Depreciation [2] (10,023,000)      
Net Cost Basis 9,713,000      
950 Wind River Lane        
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation        
Encumbrances 0      
Initial Costs        
Land 2,400,000      
Buildings & Improvements 10,620,000      
Costs Capitalized Subsequent to Acquisition        
Buildings & Improvements 1,591,000      
Total Costs        
Land 2,400,000      
Buildings & Improvements 12,211,000      
Total [1] 14,611,000      
Accumulated Depreciation [2] (4,473,000)      
Net Cost Basis 10,138,000      
620 Professional Drive        
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation        
Encumbrances 0      
Initial Costs        
Land 784,000      
Buildings & Improvements 4,705,000      
Costs Capitalized Subsequent to Acquisition        
Buildings & Improvements 8,268,000      
Total Costs        
Land 784,000      
Buildings & Improvements 12,973,000      
Total [1] 13,757,000      
Accumulated Depreciation [2] (8,531,000)      
Net Cost Basis 5,226,000      
8000/9000/10000 Virginia Manor Road        
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation        
Encumbrances 0      
Initial Costs        
Land 0      
Buildings & Improvements 13,679,000      
Costs Capitalized Subsequent to Acquisition        
Buildings & Improvements 11,706,000      
Total Costs        
Land 0      
Buildings & Improvements 25,385,000      
Total [1] 25,385,000      
Accumulated Depreciation [2] (13,423,000)      
Net Cost Basis 11,962,000      
14225 Newbrook Drive        
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation        
Encumbrances 0      
Initial Costs        
Land 4,800,000      
Buildings & Improvements 27,639,000      
Costs Capitalized Subsequent to Acquisition        
Buildings & Improvements 22,773,000      
Total Costs        
Land 4,800,000      
Buildings & Improvements 50,412,000      
Total [1] 55,212,000      
Accumulated Depreciation [2] (23,219,000)      
Net Cost Basis 31,993,000      
Alexandria Center for Life Science - Durham        
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation        
Encumbrances 0      
Initial Costs        
Land 190,236,000      
Buildings & Improvements 471,263,000      
Costs Capitalized Subsequent to Acquisition        
Buildings & Improvements 252,275,000      
Total Costs        
Land 190,236,000      
Buildings & Improvements 723,538,000      
Total [1] 913,774,000      
Accumulated Depreciation [2] (52,766,000)      
Net Cost Basis 861,008,000      
Alexandria Center for Advanced Technologies - Research Triangle        
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation        
Encumbrances 0      
Initial Costs        
Land 27,784,000      
Buildings & Improvements 16,958,000      
Costs Capitalized Subsequent to Acquisition        
Buildings & Improvements 256,806,000      
Total Costs        
Land 27,784,000      
Buildings & Improvements 273,764,000      
Total [1] 301,548,000      
Accumulated Depreciation [2] (25,537,000)      
Net Cost Basis 276,011,000      
Alexandria Center for AgTech        
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation        
Encumbrances 0      
Initial Costs        
Land 2,801,000      
Buildings & Improvements 6,756,000      
Costs Capitalized Subsequent to Acquisition        
Buildings & Improvements 208,994,000      
Total Costs        
Land 2,801,000      
Buildings & Improvements 215,750,000      
Total [1] 218,551,000      
Accumulated Depreciation [2] (25,683,000)      
Net Cost Basis 192,868,000      
Alexandria Center for Sustainable Technologies        
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation        
Encumbrances 0      
Initial Costs        
Land 54,908,000      
Buildings & Improvements 18,849,000      
Costs Capitalized Subsequent to Acquisition        
Buildings & Improvements 123,255,000      
Total Costs        
Land 54,908,000      
Buildings & Improvements 142,104,000      
Total [1] 197,012,000      
Accumulated Depreciation [2] (51,203,000)      
Net Cost Basis 145,809,000      
Alexandria Technology Center - Alston        
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation        
Encumbrances 0      
Initial Costs        
Land 1,430,000      
Buildings & Improvements 17,482,000      
Costs Capitalized Subsequent to Acquisition        
Buildings & Improvements 34,099,000      
Total Costs        
Land 1,430,000      
Buildings & Improvements 51,581,000      
Total [1] 53,011,000      
Accumulated Depreciation [2] (28,919,000)      
Net Cost Basis 24,092,000      
6040 George Watts Hill Drive        
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation        
Encumbrances 0      
Initial Costs        
Land 0      
Buildings & Improvements 0      
Costs Capitalized Subsequent to Acquisition        
Buildings & Improvements 88,166,000      
Total Costs        
Land 0      
Buildings & Improvements 88,166,000      
Total [1] 88,166,000      
Accumulated Depreciation [2] (6,806,000)      
Net Cost Basis 81,360,000      
Alexandria Innovation Center - Research Triangle        
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation        
Encumbrances 0      
Initial Costs        
Land 1,065,000      
Buildings & Improvements 21,218,000      
Costs Capitalized Subsequent to Acquisition        
Buildings & Improvements 31,979,000      
Total Costs        
Land 1,065,000      
Buildings & Improvements 53,197,000      
Total [1] 54,262,000      
Accumulated Depreciation [2] (25,398,000)      
Net Cost Basis 28,864,000      
2525 East NC Highway 54        
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation        
Encumbrances 0      
Initial Costs        
Land 713,000      
Buildings & Improvements 12,827,000      
Costs Capitalized Subsequent to Acquisition        
Buildings & Improvements 20,750,000      
Total Costs        
Land 713,000      
Buildings & Improvements 33,577,000      
Total [1] 34,290,000      
Accumulated Depreciation [2] (17,078,000)      
Net Cost Basis 17,212,000      
601 Keystone Park Drive        
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation        
Encumbrances 0      
Initial Costs        
Land 785,000      
Buildings & Improvements 11,546,000      
Costs Capitalized Subsequent to Acquisition        
Buildings & Improvements 15,846,000      
Total Costs        
Land 785,000      
Buildings & Improvements 27,392,000      
Total [1] 28,177,000      
Accumulated Depreciation [2] (8,861,000)      
Net Cost Basis 19,316,000      
6101 Quadrangle Drive        
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation        
Encumbrances 0      
Initial Costs        
Land 951,000      
Buildings & Improvements 3,982,000      
Costs Capitalized Subsequent to Acquisition        
Buildings & Improvements 12,261,000      
Total Costs        
Land 951,000      
Buildings & Improvements 16,243,000      
Total [1] 17,194,000      
Accumulated Depreciation [2] (5,064,000)      
Net Cost Basis 12,130,000      
Alexandria Center for NextGen Medicines        
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation        
Encumbrances 0      
Initial Costs        
Land 94,184,000      
Buildings & Improvements 0      
Costs Capitalized Subsequent to Acquisition        
Buildings & Improvements 10,358,000      
Total Costs        
Land 94,184,000      
Buildings & Improvements 10,358,000      
Total [1] 104,542,000      
Accumulated Depreciation [2] 0      
Net Cost Basis 104,542,000      
Intersection Campus        
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation        
Encumbrances 0      
Initial Costs        
Land 159,310,000      
Buildings & Improvements 440,295,000      
Costs Capitalized Subsequent to Acquisition        
Buildings & Improvements 39,352,000      
Total Costs        
Land 159,310,000      
Buildings & Improvements 479,647,000      
Total [1] 638,957,000      
Accumulated Depreciation [2] (23,934,000)      
Net Cost Basis 615,023,000      
1020 Red River Street and 1001 Trinity Street        
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation        
Encumbrances 0      
Initial Costs        
Land 66,451,000      
Buildings & Improvements 61,732,000      
Costs Capitalized Subsequent to Acquisition        
Buildings & Improvements 1,333,000      
Total Costs        
Land 66,451,000      
Buildings & Improvements 63,065,000      
Total [1] 129,516,000      
Accumulated Depreciation [2] (1,942,000)      
Net Cost Basis 127,574,000      
Alexandria Center for Advanced Technologies at The Woodlands        
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation        
Encumbrances 0      
Initial Costs        
Land 2,116,000      
Buildings & Improvements 9,784,000      
Costs Capitalized Subsequent to Acquisition        
Buildings & Improvements 122,047,000      
Total Costs        
Land 2,116,000      
Buildings & Improvements 131,831,000      
Total [1] 133,947,000      
Accumulated Depreciation [2] (669,000)      
Net Cost Basis 133,278,000      
Other - Texas        
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation        
Encumbrances 0      
Initial Costs        
Land 110,867,000      
Buildings & Improvements 219,000      
Costs Capitalized Subsequent to Acquisition        
Buildings & Improvements 22,793,000      
Total Costs        
Land 110,867,000      
Buildings & Improvements 23,012,000      
Total [1] 133,879,000      
Accumulated Depreciation [2] (122,000)      
Net Cost Basis 133,757,000      
Canada        
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation        
Encumbrances 0      
Initial Costs        
Land 77,005,000      
Buildings & Improvements 167,405,000      
Costs Capitalized Subsequent to Acquisition        
Buildings & Improvements 97,403,000      
Total Costs        
Land 77,005,000      
Buildings & Improvements 264,808,000      
Total [1] 341,813,000      
Accumulated Depreciation [2] (34,320,000)      
Net Cost Basis 307,493,000      
Various        
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation        
Encumbrances 0      
Initial Costs        
Land 340,160,000      
Buildings & Improvements 229,903,000      
Costs Capitalized Subsequent to Acquisition        
Buildings & Improvements 173,747,000      
Total Costs        
Land 340,160,000      
Buildings & Improvements 403,650,000      
Total [1] 743,810,000      
Accumulated Depreciation [2] (157,298,000)      
Net Cost Basis 586,512,000      
China        
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation        
Encumbrances 0      
Initial Costs        
Land 0      
Buildings & Improvements 0      
Costs Capitalized Subsequent to Acquisition        
Buildings & Improvements 4,212,000      
Total Costs        
Land 0      
Buildings & Improvements 4,212,000      
Total [1] 4,212,000      
Accumulated Depreciation [2] (4,212,000)      
Net Cost Basis $ 0      
[1] As of December 31, 2023, the total cost of our real estate assets aggregated $36.6 billion, which exceeded the cost of real estate for federal income tax purposes aggregating $36.1 billion by approximately $483.2 million.
[2] The depreciable life ranges up to 40 years for buildings and improvements, up to 20 years for land improvements, and the term of the respective lease for tenant improvements.