Segment Reporting - Total Revenue, NOI, and Real Estate by Segment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Segment Reporting
Property Taxes	$ (327,611)	$ (306,794)	$ (288,960)
Total Expenses	(2,245,872)	(2,130,370)	(2,056,441)
Total NOI	1,974,431	1,856,443	1,701,416
Management, development and other fees	7,081	7,722	6,333
Same Store
Segment Reporting
Real estate capitalized additions	236,592	188,507	209,607
Operating segment | Disposals
Segment Reporting
Gross real estate assets held for sale	25,288	543,000	280,889
Segment Reporting, Reconciling Item, Corporate Nonsegment
Segment Reporting
Gross real estate assets non-allocated	118,342	70,822	122,886
Continuing Operations
Segment Reporting
Total Revenue	2,864,634	2,675,511	2,456,482
Property Taxes	(301,696)	(287,648)	(260,505)
Payroll	(152,572)	(152,645)	(148,462)
Repairs & Maintenance	(147,183)	(141,110)	(126,137)
Utilities	(109,297)	(93,716)	(76,227)
Office Operations	(63,480)	(63,823)	(63,188)
Segment Reporting, Insurance	39,591	35,919	29,910
Marketing	(15,202)	(14,781)	(13,747)
Total Expenses	(890,203)	(819,068)	(754,973)
Total NOI	1,974,431	1,856,443	1,701,416
Gross real estate	27,654,230	26,051,949	25,288,384
Management, development and other fees	23,906	25,299	20,536
Continuing Operations | Management, development and other fees and other ancillary items
Segment Reporting
Management, development and other fees	7,081	7,722	6,333
Continuing Operations | Same Store Operating Expense
Segment Reporting
Operating Expenses	(829,021)	(789,642)	(718,176)
Continuing Operations | Non-Same Store Operating Expense
Segment Reporting
Operating Expenses	(61,182)	(29,426)	(36,797)
Continuing Operations | Operating segment | Same Store
Segment Reporting
Total Revenue	2,680,192	2,591,016	2,333,443
Property Taxes	(301,696)	(287,648)	(260,505)
Payroll	(152,572)	(152,645)	(148,462)
Repairs & Maintenance	(147,183)	(141,110)	(126,137)
Utilities	(109,297)	(93,716)	(76,227)
Office Operations	(63,480)	(63,823)	(63,188)
Segment Reporting, Insurance	39,591	35,919	29,910
Marketing	(15,202)	(14,781)	(13,747)
Total Expenses	(829,021)	(789,642)	(718,176)
Total NOI	1,851,171	1,801,374	1,615,267
Gross real estate	23,419,850	23,182,172	22,197,772
Management, development and other fees	10,769	12,752	11,048
Continuing Operations | Operating segment | Same Store | Management, development and other fees and other ancillary items
Segment Reporting
Management, development and other fees	0	0	0
Continuing Operations | Operating segment | Same Store | Same Store Operating Expense
Segment Reporting
Operating Expenses	(829,021)	(789,642)	(718,176)
Continuing Operations | Operating segment | Same Store | Non-Same Store Operating Expense
Segment Reporting
Operating Expenses	0	0	0
Continuing Operations | Operating segment | Other Stabilized Communities
Segment Reporting
Total Revenue	118,558	78,325	93,305
Total Expenses	(38,230)	(24,585)	(25,750)
Total NOI	80,328	53,740	67,462
Gross real estate	1,749,380	1,269,463	1,515,963
Management, development and other fees	5,571	4,697	2,990
Continuing Operations | Operating segment | Other Stabilized Communities | Management, development and other fees and other ancillary items
Segment Reporting
Management, development and other fees	0	0	0
Continuing Operations | Operating segment | Other Stabilized Communities | Same Store Operating Expense
Segment Reporting
Operating Expenses	0	0	0
Continuing Operations | Operating segment | Other Stabilized Communities | Non-Same Store Operating Expense
Segment Reporting
Operating Expenses	(38,230)	(24,585)	(25,750)
Continuing Operations | Operating segment | Development / Redevelopment
Segment Reporting
Total Revenue	65,884	6,170	29,734
Total Expenses	(22,952)	(4,841)	(11,047)
Total NOI	42,932	1,329	18,687
Gross real estate	2,485,000	1,600,314	1,574,649
Continuing Operations | Operating segment | Development / Redevelopment | Same Store Operating Expense
Segment Reporting
Operating Expenses	0	0	0
Continuing Operations | Operating segment | Development / Redevelopment | Non-Same Store Operating Expense
Segment Reporting
Operating Expenses	(22,952)	(4,841)	(11,047)
Continuing Operations | Segment Reporting, Reconciling Item, Corporate Nonsegment
Segment Reporting
Management, development and other fees	7,081	7,722	6,333
Continuing Operations | Segment Reporting, Reconciling Item, Corporate Nonsegment | Management, development and other fees and other ancillary items
Segment Reporting
Management, development and other fees	7,081	7,722	6,333
Continuing Operations | Segment Reporting, Reconciling Item, Excluding Corporate Nonsegment
Segment Reporting
Gross real estate	$ 151,922	$ 199,062	$ 179,204