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Reportable Segments - NOI from Our Rental Real Estate for Continuing Operations (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024
Segment Reporting Information [Line Items] |  |  |  |
Rental income | $ 768,827 | $ 734,163 | $ 1,529,637 | $ 1,464,981
Operating expenses | 248,606 | 232,069 | 504,331 | 475,626
NOI | 520,221 | 502,094 | 1,025,306 | 989,355
Same Store |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Rental income | 727,043 | 707,750 | 1,433,835 | 1,399,994
Operating expenses | 229,434 | 221,318 | 462,051 | 444,398
NOI | 497,609 | 486,432 | 971,784 | 955,596
Los Angeles | Same Store |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Rental income | 121,545 | 120,118 | 242,484 | 239,386
Operating expenses | 37,782 | 35,856 | 76,589 | 73,686
NOI | 83,763 | 84,262 | 165,895 | 165,700
Orange County | Same Store |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Rental income | 31,964 | 31,171 | 63,811 | 62,272
Operating expenses | 6,964 | 6,908 | 14,221 | 13,805
NOI | 25,000 | 24,263 | 49,590 | 48,467
San Diego | Same Store |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Rental income | 21,287 | 20,746 | 42,392 | 41,370
Operating expenses | 4,622 | 4,257 | 9,307 | 8,604
NOI | 16,665 | 16,489 | 33,085 | 32,766
Subtotal - Southern California | Same Store |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Rental income | 174,796 | 172,035 | 348,687 | 343,028
Operating expenses | 49,368 | 47,021 | 100,117 | 96,095
NOI | 125,428 | 125,014 | 248,570 | 246,933
Washington D.C. | Same Store |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Rental income | 116,496 | 111,280 | 226,463 | 216,933
Operating expenses | 36,016 | 35,360 | 71,768 | 68,319
NOI | 80,480 | 75,920 | 154,695 | 148,614
San Francisco | Same Store |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Rental income | 114,497 | 109,549 | 223,067 | 214,833
Operating expenses | 33,201 | 31,330 | 67,254 | 64,258
NOI | 81,296 | 78,219 | 155,813 | 150,575
New York | Same Store |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Rental income | 127,960 | 122,172 | 254,116 | 246,136
Operating expenses | 51,832 | 50,077 | 104,832 | 101,455
NOI | 76,128 | 72,095 | 149,284 | 144,681
Boston | Same Store |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Rental income | 82,917 | 82,081 | 164,613 | 162,532
Operating expenses | 24,184 | 23,266 | 49,663 | 47,354
NOI | 58,733 | 58,815 | 114,950 | 115,178
Seattle | Same Store |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Rental income | 69,769 | 68,427 | 139,131 | 135,974
Operating expenses | 19,912 | 19,632 | 39,657 | 38,863
NOI | 49,857 | 48,795 | 99,474 | 97,111
Denver | Same Store |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Rental income | 19,199 | 19,937 | 38,367 | 39,690
Operating expenses | 5,753 | 5,801 | 11,808 | 11,835
NOI | 13,446 | 14,136 | 26,559 | 27,855
Other Expansion Markets | Same Store |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Rental income | 21,409 | 22,269 | 39,391 | 40,868
Operating expenses | 9,168 | 8,831 | 16,952 | 16,219
NOI | 12,241 | 13,438 | 22,439 | 24,649
Non-same store |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Rental income | 40,934 | 4,920 | 91,124 | 20,162
Operating expenses | 15,376 | 2,477 | 33,292 | 9,509
NOI | 25,558 | 2,443 | 57,832 | 10,653
Same and Non-same Store |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Rental income | 767,977 | 712,670 | 1,524,959 | 1,420,156
Operating expenses | 244,810 | 223,795 | 495,343 | 453,907
NOI | 523,167 | 488,875 | 1,029,616 | 966,249
Other |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Rental income | 850 | 21,493 | 4,678 | 44,825
Operating expenses | 3,796 | 8,274 | 8,988 | 21,719
NOI | $ (2,946) | $ 13,219 | $ (4,310) | $ 23,106

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