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, 2022		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
Proceeds from sale of interest in property partnerships and 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		156,830,000
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
Equity, shares at Dec. 31, 2023	156,940,866	156,941,000
Equity, value at Dec. 31, 2023	$ 8,183,981	$ 1,569	6,715,149	(816,152)	(2,722)	(21,147)	666,580	1,640,704
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Redemption of operating partnership units to common stock, shares		36,000
Redemption of operating partnership units to common stock, value	0	$ 1	1,302				(1,303)
Allocated net income for the period	106,604			79,883			9,500	17,221
Dividends declared	(172,772)			(153,908)			(18,864)
Shares issued pursuant to stock purchase plan, shares		8,000
Shares issued pursuant to stock purchase plan, value	600		600
Net activity from stock option and incentive plan, shares		64,000
Net activity from stock option and incentive plan, value	16,531		2,262				14,269
Proceeds from sale of interest in property partnerships and contributions from noncontrolling interests in property partnerships	142,942		46,082					96,860
Distributions to noncontrolling interests in property partnerships	(20,025)							(20,025)
Effective portion of interest rate contracts	16,351					14,646	1,705
Amortization of interest rate contracts	3,360					2,881	335	144
Reallocation of noncontrolling interest	$ 0		(12,747)				12,747
Equity, shares at Mar. 31, 2024	157,049,171	157,049,000
Equity, value at Mar. 31, 2024	$ 8,277,572	$ 1,570	$ 6,752,648	$ (890,177)	$ (2,722)	$ (3,620)	$ 684,969	$ 1,734,904