Consolidated Statements of Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Stock [Member]	Treasury Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Distributions in Excess of Net Income [Member]	Total Stockholders Equity [Member]	Noncontrolling Interest Exchangeable Operating Partnership Units [Member]	Noncontrolling Interests In Limited Partners Interest In Consolidated Partnerships [Member]	Total Noncontrolling Interest [Member]
Beginning Balance at Dec. 31, 2020	$ 6,058,147	$ 1,697	$ (24,436)	$ 7,792,082	$ (18,625)	$ (1,765,806)	$ 5,984,912	$ 35,727	$ 37,508	$ 73,235
Net income	81,625					80,656	80,656	364	605	969
Other comprehensive income
Other comprehensive income before reclassification	5,525				5,162		5,162	25	338	363
Amounts reclassified from accumulated other comprehensive loss	1,035				951		951	4	80	84
Deferred compensation plan, net			(339)	339
Restricted stock issued, net of amortization	2,479	1		2,478			2,479
Common stock repurchased for taxes withheld for stock based compensation, net	(3,859)			(3,859)			(3,859)
Common stock issued under dividend reinvestment plan	376			376			376
Distributions to partners	(785)								(785)	(785)
Cash dividends declared - common stock/unit	(101,499)					(101,046)	(101,046)	(453)		(453)
Ending Balance at Mar. 31, 2021	6,043,044	1,698	(24,775)	7,791,416	(12,512)	(1,786,196)	5,969,631	35,667	37,746	73,413
Beginning Balance at Dec. 31, 2021	6,109,932	1,712	(22,758)	7,883,458	(10,227)	(1,814,814)	6,037,371	35,447	37,114	72,561
Net income	196,816					195,228	195,228	863	725	1,588
Other comprehensive income
Other comprehensive income before reclassification	8,214				7,537		7,537	37	640	677
Amounts reclassified from accumulated other comprehensive loss	1,010				926		926	4	80	84
Deferred compensation plan, net			(1,073)	1,073
Restricted stock issued, net of amortization	4,208	2		4,206			4,208
Common stock repurchased for taxes withheld for stock based compensation, net	(6,091)			(6,091)			(6,091)
Common stock issued under dividend reinvestment plan	118			118			118
Distributions to partners	(1,070)								(1,070)	(1,070)
Cash dividends declared - common stock/unit	(107,445)					(106,970)	(106,970)	(475)		(475)
Ending Balance at Mar. 31, 2022	$ 6,205,692	$ 1,714	$ (23,831)	$ 7,882,764	$ (1,764)	$ (1,726,556)	$ 6,132,327	$ 35,876	$ 37,489	$ 73,365