Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Cash flows from operating activities:
Net income	$ 330,137	$ 272,739
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	268,389	263,912
Gain on sale of depreciable real estate assets	(131,964)	(134,828)
Gain on sale of non-depreciable real estate assets	(378)	(32)
Loss on embedded derivative in preferred shares	9,939	1,940
Stock compensation expense	10,740	9,212
Amortization of debt issuance costs, discounts and premiums	3,018	2,674
Loss on investments	31,093	7,901
Net change in operating accounts and other operating activities	(57,067)	(10,398)
Net cash provided by operating activities	463,907	397,318
Cash flows from investing activities:
Purchases of real estate and other assets	(17,238)	(46,028)
Capital improvements and other	(132,849)	(127,932)
Development costs	(84,636)	(119,612)
Distributions from real estate joint venture	352	392
Contributions to affiliates	(9,300)	(1,114)
Proceeds from real estate asset dispositions	165,201	158,136
Proceeds from insurance recoveries	20,675	3,620
Net cash used in investing activities	(57,795)	(132,538)
Cash flows from financing activities:
Net proceeds from commercial paper	0	108,000
Principal payments on notes payable	(691)	(119,481)
Distributions to noncontrolling interests	(6,965)	(8,302)
Dividends paid on common shares	(250,960)	(234,591)
Dividends paid on preferred shares	(1,844)	(1,844)
Acquisition of noncontrolling interests	(43,070)	0
Net change in other financing activities	(11,478)	(1,173)
Net cash used in financing activities	(315,008)	(257,391)
Net increase in cash, cash equivalents and restricted cash	91,104	7,389
Cash, cash equivalents and restricted cash, beginning of period	130,598	35,615
Cash, cash equivalents and restricted cash, end of period	221,702	43,004
Reconciliation of cash, cash equivalents and restricted cash:
Cash and cash equivalents	60,568	31,881
Restricted cash	161,134	11,123
Total cash, cash equivalents and restricted cash	221,702	43,004
Supplemental disclosure of cash flow information:
Interest paid	79,201	81,122
Income taxes paid	2,635	2,474
Supplemental disclosure of noncash investing and financing activities:
Conversion of OP Units to shares of common stock	193	22,164
Accrued construction in progress	31,803	30,771
Interest capitalized	3,893	5,333
Limited Partnership [Member]
Cash flows from operating activities:
Net income	330,137	272,739
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	268,389	263,912
Gain on sale of depreciable real estate assets	(131,964)	(134,828)
Gain on sale of non-depreciable real estate assets	(378)	(32)
Loss on embedded derivative in preferred shares	9,939	1,940
Stock compensation expense	10,740	9,212
Amortization of debt issuance costs, discounts and premiums	3,018	2,674
Loss on investments	31,093	7,901
Net change in operating accounts and other operating activities	(57,067)	(10,398)
Net cash provided by operating activities	463,907	397,318
Cash flows from investing activities:
Purchases of real estate and other assets	(17,238)	(46,028)
Capital improvements and other	(132,849)	(127,932)
Development costs	(84,636)	(119,612)
Distributions from real estate joint venture	352	392
Contributions to affiliates	(9,300)	(1,114)
Proceeds from real estate asset dispositions	165,201	158,136
Proceeds from insurance recoveries	20,675	3,620
Net cash used in investing activities	(57,795)	(132,538)
Cash flows from financing activities:
Net proceeds from commercial paper	0	108,000
Principal payments on notes payable	(691)	(119,481)
Dividends paid on common shares	(257,925)	(242,893)
Dividends paid on preferred shares	(1,844)	(1,844)
Acquisition of noncontrolling interests	(43,070)	0
Net change in other financing activities	(11,478)	(1,173)
Net cash used in financing activities	(315,008)	(257,391)
Net increase in cash, cash equivalents and restricted cash	91,104	7,389
Cash, cash equivalents and restricted cash, beginning of period	130,598	35,615
Cash, cash equivalents and restricted cash, end of period	221,702	43,004
Reconciliation of cash, cash equivalents and restricted cash:
Cash and cash equivalents	60,568	31,881
Restricted cash	161,134	11,123
Total cash, cash equivalents and restricted cash	221,702	43,004
Supplemental disclosure of cash flow information:
Interest paid	79,201	81,122
Income taxes paid	2,635	2,474
Supplemental disclosure of noncash investing and financing activities:
Accrued construction in progress	31,803	30,771
Interest capitalized	$ 3,893	$ 5,333