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Reportable Segments - NOI from Our Rental Real Estate for Continuing Operations (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Segment Reporting Information [Line Items] |  |  |
Rental income | $ 2,980,108 | $ 2,873,964 | $ 2,735,180
Operating expenses | 961,826 | 926,689 | 872,277
NOI | 2,018,282 | 1,947,275 | 1,862,903
Same Store |  |  |
Segment Reporting Information [Line Items] |  |  |
Rental income | 2,823,418 | 2,740,193 | 2,609,766
Operating expenses | 894,477 | 869,635 | 837,602
NOI | 1,928,941 | 1,870,558 | 1,772,164
Non-same Store |  |  |
Segment Reporting Information [Line Items] |  |  |
Operating expenses | 36,350 | 15,117 | 29,758
Los Angeles | Same Store |  |  |
Segment Reporting Information [Line Items] |  |  |
Rental income | 479,711 | 466,980 | 450,635
Operating expenses | 148,030 | 143,983 | 132,858
NOI | 331,681 | 322,997 | 317,777
Orange County | Same Store |  |  |
Segment Reporting Information [Line Items] |  |  |
Rental income | 125,214 | 121,113 | 122,660
Operating expenses | 28,208 | 26,759 | 26,511
NOI | 97,006 | 94,354 | 96,149
San Diego | Same Store |  |  |
Segment Reporting Information [Line Items] |  |  |
Rental income | 96,969 | 92,847 | 86,728
Operating expenses | 21,127 | 20,794 | 19,506
NOI | 75,842 | 72,053 | 67,222
Subtotal - Southern California | Same Store |  |  |
Segment Reporting Information [Line Items] |  |  |
Rental income | 701,894 | 680,940 | 660,023
Operating expenses | 197,365 | 191,536 | 178,875
NOI | 504,529 | 489,404 | 481,148
San Francisco | Same Store |  |  |
Segment Reporting Information [Line Items] |  |  |
Rental income | 431,323 | 424,547 | 415,173
Operating expenses | 129,084 | 128,742 | 124,192
NOI | 302,239 | 295,805 | 290,981
Washington D.C. | Same Store |  |  |
Segment Reporting Information [Line Items] |  |  |
Rental income | 438,914 | 419,628 | 417,210
Operating expenses | 137,786 | 132,610 | 138,570
NOI | 301,128 | 287,018 | 278,640
New York | Same Store |  |  |
Segment Reporting Information [Line Items] |  |  |
Rental income | 494,060 | 476,319 | 434,820
Operating expenses | 201,857 | 193,311 | 187,218
NOI | 292,203 | 283,008 | 247,602
Boston | Same Store |  |  |
Segment Reporting Information [Line Items] |  |  |
Rental income | 327,134 | 314,929 | 270,899
Operating expenses | 94,576 | 91,977 | 82,523
NOI | 232,558 | 222,952 | 188,376
Seattle | Same Store |  |  |
Segment Reporting Information [Line Items] |  |  |
Rental income | 285,539 | 278,170 | 281,959
Operating expenses | 81,843 | 78,418 | 79,037
NOI | 203,696 | 199,752 | 202,922
Denver | Same Store |  |  |
Segment Reporting Information [Line Items] |  |  |
Rental income | 71,061 | 71,067 | 67,785
Operating expenses | 21,600 | 21,328 | 19,569
NOI | 49,461 | 49,739 | 48,216
Other Expansion Markets | Same Store |  |  |
Segment Reporting Information [Line Items] |  |  |
Rental income | 73,493 | 74,593 | 61,897
Operating expenses | 30,366 | 31,713 | 27,618
NOI | 43,127 | 42,880 | 34,279
Non-same store |  |  |
Segment Reporting Information [Line Items] |  |  |
Rental income | 100,419 | 35,474 | 74,379
Operating expenses | 36,350 | 15,117 | 29,758
NOI | 64,069 | 20,357 | 44,621
Same and Non-same Store |  |  |
Segment Reporting Information [Line Items] |  |  |
Rental income | 2,923,837 | 2,775,667 | 2,684,145
Operating expenses | 930,827 | 884,752 | 867,360
NOI | 1,993,010 | 1,890,915 | 1,816,785
Other |  |  |
Segment Reporting Information [Line Items] |  |  |
Rental income | 56,271 | 98,297 | 51,035
Operating expenses | 30,999 | 41,937 | 4,917
NOI | $ 25,272 | $ 56,360 | $ 46,118

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