Segment Reporting - Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Segment Reporting
Total revenue	$ 674,708	$ 613,927
NOI	465,039	409,713
Gross real estate	26,090,235	24,590,926
Gross real estate assets held for sale	35,556
Operating Segments | Same Store
Segment Reporting
Total revenue	629,929	575,644
NOI	436,454	394,926
Gross real estate	22,486,214	22,262,560
Operating Segments | Same Store | New England
Segment Reporting
Total revenue	92,435	82,806
NOI	61,511	53,448
Gross real estate	2,976,832	2,939,442
Operating Segments | Same Store | Metro NY/NJ
Segment Reporting
Total revenue	132,495	118,641
NOI	92,052	81,495
Gross real estate	4,470,962	4,437,153
Operating Segments | Same Store | Mid-Atlantic
Segment Reporting
Total revenue	92,079	85,300
NOI	64,739	58,495
Gross real estate	3,511,646	3,477,547
Operating Segments | Same Store | Southeast Florida
Segment Reporting
Total revenue	19,310	16,459
NOI	12,933	10,482
Gross real estate	799,221	793,309
Operating Segments | Same Store | Denver, CO
Segment Reporting
Total revenue	6,847	6,315
NOI	4,944	4,727
Gross real estate	321,744	320,803
Operating Segments | Same Store | Pacific Northwest
Segment Reporting
Total revenue	42,660	38,851
NOI	30,429	27,476
Gross real estate	1,536,311	1,526,324
Operating Segments | Same Store | Northern California
Segment Reporting
Total revenue	105,145	97,105
NOI	74,788	68,753
Gross real estate	3,771,728	3,729,145
Operating Segments | Same Store | Southern California
Segment Reporting
Total revenue	133,099	124,968
NOI	90,982	86,447
Gross real estate	4,771,435	4,717,572
Operating Segments | Same Store | Other Expansion Regions
Segment Reporting
Total revenue	5,859	5,199
NOI	4,076	3,603
Gross real estate	326,335	321,265
Operating Segments | Other Stabilized
Segment Reporting
Total revenue	31,730	15,215
NOI	22,348	10,739
Gross real estate	1,518,856	1,052,283
Operating Segments | Development / Redevelopment
Segment Reporting
Total revenue	10,500	6,052
NOI	6,237	4,048
Gross real estate	1,781,207	943,753
Operating Segments | Disposals
Segment Reporting
Gross real estate		433,495
Land Held for Future Development
Segment Reporting
Gross real estate	177,889	218,852
Non-allocated
Segment Reporting
Total revenue	1,066	752
Gross real estate	126,069	113,478
Continuing Operations
Segment Reporting
Total revenue	673,225	597,663
Continuing Operations | Operating Segments | Same Store
Segment Reporting
Total revenue	629,929	575,644
Continuing Operations | Operating Segments | Other Stabilized
Segment Reporting
Total revenue	31,730	15,215
Continuing Operations | Non-allocated
Segment Reporting
Total revenue	$ 1,066	$ 752