Segment Information - Schedule of Reconciliation of Assets from Segment to Consolidated (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024	Jun. 30, 2024	Dec. 31, 2023
Revenues from External Customers and Long-Lived Assets [Line Items]
Net reportable operating segments - real estate assets	$ 11,709,604	$ 11,438,900
Real estate under development	105,591	52,682
Co-investments	895,821	935,014
Real estate held for sale	47,653	0
Cash and cash equivalents, including restricted cash	67,884	75,846	$ 64,151	$ 400,334
Marketable securities	82,162	69,794
Notes and other receivables	138,096	206,706
Operating lease right-of-use assets	52,519	51,556
Prepaid expenses and other assets	82,160	96,861
Total assets	13,181,490	12,927,359
Operating Segments | Southern California
Revenues from External Customers and Long-Lived Assets [Line Items]
Net reportable operating segments - real estate assets	4,094,046	4,162,462
Operating Segments | Northern California
Revenues from External Customers and Long-Lived Assets [Line Items]
Net reportable operating segments - real estate assets	6,015,104	5,452,235
Operating Segments | Seattle Metro
Revenues from External Customers and Long-Lived Assets [Line Items]
Net reportable operating segments - real estate assets	1,437,049	1,460,865
Other real estate assets
Revenues from External Customers and Long-Lived Assets [Line Items]
Net reportable operating segments - real estate assets	$ 163,405	$ 363,338