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Segment Information - Schedule of Reconciliation of Revenues and Operating Profit (Loss) from Segments to Consolidated (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Rental and other property revenue | $ 470,942 | $ 448,135 | $ 1,400,641 | $ 1,312,132
Property operating expenses, including real estate taxes | 143,436 | 134,792 | 417,486 | 387,824
Net operating income | 327,506 | 313,343 | 983,155 | 924,308
Management and other fees from affiliates | 2,361 | 2,563 | 7,078 | 7,849
Corporate-level property management expenses | (12,216) | (11,610) | (36,768) | (34,331)
Depreciation and amortization | (151,489) | (146,439) | (454,277) | (431,785)
General and administrative | (18,058) | (29,067) | (51,507) | (67,374)
Expensed acquisition and investment related costs | (25) | 0 | (25) | (68)
Gain on sale of real estate and land | 62,320 | 0 | 299,524 | 0
Interest expense | (64,660) | (59,232) | (192,654) | (174,285)
Total return swap income | 1,329 | 807 | 3,600 | 2,232
Interest and other income | 5,900 | 11,449 | 16,997 | 78,292
Equity income from co-investments | 17,798 | 11,649 | 39,984 | 33,667
Tax benefit on unconsolidated technology co-investments | 1,958 | 441 | 2,353 | 1,199
Loss on early retirement of debt | 0 | 0 | (762) | 0
Gain on remeasurement of co-investment | 0 | 31,583 | 330 | 169,909
Net income | 172,724 | 125,487 | 617,028 | 509,613
Operating Segments | Southern California |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Rental and other property revenue | 190,626 | 181,673 | 568,992 | 530,051
Property operating expenses, including real estate taxes | 57,828 | 53,584 | 167,422 | 154,727
Net operating income | 132,798 | 128,089 | 401,570 | 375,324
Operating Segments | Northern California |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Rental and other property revenue | 193,208 | 168,838 | 563,915 | 490,824
Property operating expenses, including real estate taxes | 61,158 | 52,230 | 175,499 | 148,956
Net operating income | 132,050 | 116,608 | 388,416 | 341,868
Operating Segments | Seattle Metro |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Rental and other property revenue | 79,240 | 74,576 | 234,751 | 220,271
Property operating expenses, including real estate taxes | 23,333 | 22,597 | 67,691 | 65,619
Net operating income | 55,907 | 51,979 | 167,060 | 154,652
Other real estate assets |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Rental and other property revenue | 7,868 | 23,048 | 32,983 | 70,986
Property operating expenses, including real estate taxes | 1,117 | 6,381 | 6,874 | 18,522
Net operating income | $ 6,751 | $ 16,667 | $ 26,109 | $ 52,464

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