Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Cash flows from operating activities:
Net income	$ 654,776	$ 550,702	$ 264,015
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	544,004	534,415	511,678
Gain on sale of depreciable real estate assets	(214,762)	(220,428)	(9)
Gain on sale of non-depreciable real estate assets	(809)	(811)	(1,024)
Loss (gain) on embedded derivative in preferred shares	21,107	4,560	(2,562)
Stock compensation expense	18,798	16,665	14,329
Amortization of debt issuance costs, discounts and premiums	6,064	5,652	4,960
Loss (gain) on investments	45,357	(51,713)	(5,608)
Net change in operating accounts and other operating activities	(16,056)	55,925	38,170
Net cash provided by operating activities	1,058,479	894,967	823,949
Cash flows from investing activities:
Purchases of real estate and other assets	(271,428)	(46,028)	(56,965)
Capital improvements and other	(296,176)	(279,635)	(225,506)
Development costs	(172,124)	(231,642)	(201,435)
Distributions from real estate joint venture	538	497	349
Contributions to affiliates	(13,849)	(4,669)	(5,349)
Proceeds from real estate asset dispositions	320,491	293,071	2,618
Proceeds from insurance recoveries	27,312	14,820	1,557
Net cash used in investing activities	(405,236)	(253,586)	(484,731)
Cash flows from financing activities:
Proceeds from revolving credit facility			255,000
Repayments of revolving credit facility			(255,000)
Net proceeds from (payments of) commercial paper	20,000	(172,000)	102,000
Proceeds from notes payable		594,423	447,593
Principal payments on notes payable	(126,401)	(467,153)	(441,108)
Payment of deferred financing costs	(5,516)	(5,940)	(4,217)
Distributions to noncontrolling interests	(14,927)	(15,497)	(16,243)
Distributions paid on common shares/units	(539,605)	(470,401)	(457,355)
Distributions paid on preferred shares/units	(3,688)	(3,688)	(3,688)
Acquisition of noncontrolling interests	(43,070)	0	0
Net change in other financing activities	(9,563)	(6,142)	(1,126)
Net cash used in financing activities	(722,770)	(546,398)	(374,144)
Net (decrease) increase in cash, cash equivalents and restricted cash	(69,527)	94,983	(34,926)
Cash, cash equivalents and restricted cash, beginning of period	130,598	35,615	70,541
Cash, cash equivalents and restricted cash, end of period	61,071	130,598	35,615
Reconciliation of cash, cash equivalents and restricted cash:
Cash and cash equivalents	38,659	54,302	25,198
Restricted cash	22,412	76,296	10,417
Total cash, cash equivalents and restricted cash	61,071	130,598	35,615
Supplemental disclosure of cash flow information:
Interest paid	157,497	158,630	165,098
Income taxes paid	3,490	2,543	2,549
Supplemental disclosure of noncash investing and financing activities:
Conversion of OP Units to shares of common stock	2,118	43,292	502
Accrued construction in progress	16,484	15,123	19,625
Interest capitalized	8,728	9,720	6,912
Limited Partner [Member]
Cash flows from operating activities:
Net income	654,776	550,702	264,015
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	544,004	534,415	511,678
Gain on sale of depreciable real estate assets	(214,762)	(220,428)	(9)
Gain on sale of non-depreciable real estate assets	(809)	(811)	(1,024)
Loss (gain) on embedded derivative in preferred shares	21,107	4,560	(2,562)
Stock compensation expense	18,798	16,665	14,329
Amortization of debt issuance costs, discounts and premiums	6,064	5,652	4,960
Loss (gain) on investments	45,357	(51,713)	(5,608)
Net change in operating accounts and other operating activities	(16,056)	55,925	38,170
Net cash provided by operating activities	1,058,479	894,967	823,949
Cash flows from investing activities:
Purchases of real estate and other assets	(271,428)	(46,028)	(56,965)
Capital improvements and other	(296,176)	(279,635)	(225,506)
Development costs	(172,124)	(231,642)	(201,435)
Distributions from real estate joint venture	538	497	349
Contributions to affiliates	(13,849)	(4,669)	(5,349)
Proceeds from real estate asset dispositions	320,491	293,071	2,618
Proceeds from insurance recoveries	27,312	14,820	1,557
Net cash used in investing activities	(405,236)	(253,586)	(484,731)
Cash flows from financing activities:
Proceeds from revolving credit facility	0		255,000
Repayments of revolving credit facility	0		(255,000)
Net proceeds from (payments of) commercial paper	20,000	(172,000)	102,000
Proceeds from notes payable	0	594,423	447,593
Principal payments on notes payable	(126,401)	(467,153)	(441,108)
Payment of deferred financing costs	(5,516)	(5,940)	(4,217)
Distributions paid on common shares/units	(554,532)	(485,898)	(473,598)
Distributions paid on preferred shares/units	(3,688)	(3,688)	(3,688)
Acquisition of noncontrolling interests	(43,070)	0	0
Net change in other financing activities	(9,563)	(6,142)	(1,126)
Net cash used in financing activities	(722,770)	(546,398)	(374,144)
Net (decrease) increase in cash, cash equivalents and restricted cash	(69,527)	94,983	(34,926)
Cash, cash equivalents and restricted cash, beginning of period	130,598	35,615	70,541
Cash, cash equivalents and restricted cash, end of period	61,071	130,598	35,615
Reconciliation of cash, cash equivalents and restricted cash:
Cash and cash equivalents	38,659	54,302	25,198
Restricted cash	22,412	76,296	10,417
Total cash, cash equivalents and restricted cash	61,071	130,598	35,615
Supplemental disclosure of cash flow information:
Interest paid	157,497	158,630	165,098
Income taxes paid	3,490	2,543	2,549
Supplemental disclosure of noncash investing and financing activities:
Accrued construction in progress	16,484	15,123	19,625
Interest capitalized	$ 8,728	$ 9,720	$ 6,912