Consolidated Statements Of Equity - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-In Capital [Member]	Dividends In Excess Of Earnings [Member]	Treasury Stock, at cost [Member]	Accumulated Other Comprehensive Loss [Member]	Noncontrolling Interests [Member]	Noncontrolling interest - property partnerships [Member]
Equity, shares at Dec. 31, 2021		156,545,000
Equity, value at Dec. 31, 2021	$ 8,033,228	$ 1,565	$ 6,497,730	$ (625,891)	$ (2,722)	$ (36,662)	$ 642,655	$ 1,556,553
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Redemption of operating partnership units to common stock, shares		141,000
Redemption of operating partnership units to common stock, value	0	$ 2	5,026				(5,028)
Allocated net income for the period	176,957			143,047			16,361	17,549
Dividends declared	(171,497)			(153,577)			(17,920)
Shares issued pursuant to stock purchase plan, shares		5,000
Shares issued pursuant to stock purchase plan, value	600		600
Net activity from stock option and incentive plan, shares		21,000
Net activity from stock option and incentive plan, value	18,921		(133)				19,054
Contributions from noncontrolling interests in property partnerships	849							849
Distributions to noncontrolling interests in property partnerships	(26,640)							(26,640)
Effective portion of interest rate contracts	7,565					6,800	765
Amortization of interest rate contracts	1,676					1,377	155	144
Reallocation of noncontrolling interest	0		6,440				(6,440)
Equity, shares at Mar. 31, 2022		156,712,000
Equity, value at Mar. 31, 2022	$ 8,041,659	$ 1,567	6,509,663	(636,421)	(2,722)	(28,485)	649,602	1,548,455
Equity, shares at Dec. 31, 2022	156,757,867	156,758,000
Equity, value at Dec. 31, 2022	$ 8,363,819	$ 1,568	6,539,147	(391,356)	(2,722)	(13,718)	683,583	1,547,317
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Redemption of operating partnership units to common stock, shares		5,000
Redemption of operating partnership units to common stock, value	0	$ 0	195				(195)
Allocated net income for the period	105,628			77,890			9,078	18,660
Dividends declared	(172,054)			(153,693)			(18,361)
Shares issued pursuant to stock purchase plan, shares		9,000
Shares issued pursuant to stock purchase plan, value	586		586
Net activity from stock option and incentive plan, shares		58,000
Net activity from stock option and incentive plan, value	27,419		3,448				23,971
Contributions from noncontrolling interests in property partnerships	7,555							7,555
Distributions to noncontrolling interests in property partnerships	(21,606)							(21,606)
Effective portion of interest rate contracts	(6,538)					(5,870)	(668)
Amortization of interest rate contracts	1,675					1,374	157	144
Reallocation of noncontrolling interest	$ 0		5,938				(5,938)
Equity, shares at Mar. 31, 2023	156,829,793	156,830,000
Equity, value at Mar. 31, 2023	$ 8,306,484	$ 1,568	$ 6,549,314	$ (467,159)	$ (2,722)	$ (18,214)	$ 691,627	$ 1,552,070