Consolidated Statements Of Equity - USD ($) $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Common Stock [Member]	Preferred Stock [Member]	Additional Paid-In Capital [Member]	Dividends In Excess Of Earnings [Member]	Dividends In Excess Of Earnings [Member] Cumulative Effect, Period of Adoption, Adjustment	Treasury Stock, at cost [Member]	Accumulated Other Comprehensive Loss [Member]	Noncontrolling Interests [Member]	Noncontrolling Interests [Member] Cumulative Effect, Period of Adoption, Adjustment	Noncontrolling interest - property partnerships [Member]	Noncontrolling interest - property partnerships [Member] Cumulative Effect, Period of Adoption, Adjustment
Equity, shares at Dec. 31, 2018			154,458,000
Equity, value at Dec. 31, 2018	$ 8,213,968	$ (4,379)	$ 1,545	$ 200,000	$ 6,407,623	$ (675,534)	$ (3,864)	$ (2,722)	$ (47,741)	$ 619,352	$ (445)	$ 1,711,445	$ (70)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accounting Standards Update [Extensible List] | Accounting Standards Update 2018-09	Accounting Standards Update 2014-09 [Member]
Accounting Standards Update [Extensible List] | Accounting Standards Update 2016-02	Accounting Standards Update 2014-09 [Member]
Redemption of operating partnership units to common stock, shares			145,000
Redemption of operating partnership units to common stock, value	$ 0		$ 2		4,883					(4,885)
Allocated net income for the year	651,999					521,534				59,345		71,120
Dividends/distributions declared	(671,893)					(602,659)				(69,234)
Shares issued pursuant to stock purchase plan, shares			6,000
Shares issued pursuant to stock purchase plan, value	688				688
Net activity from stock option and incentive plan, shares			181,000
Net activity from stock option and incentive plan, value	45,000		$ 1		8,771					36,228
Sale of an interest in property partnerships	0				(4,216)							4,216
Acquisition of noncontrolling interest in property partnership	(186,963)				(162,462)							(24,501)
Issuance of operating partnership units for 360 Park Avenue South	0
Preferred Stock Redemption Charge	0
Contributions from noncontrolling interests in property partnerships	35,816											35,816
Distributions to noncontrolling interests in property partnerships	69,913											(69,913)
Effective portion of interest rate contracts	(6,751)								(6,060)	(691)
Amortization of interest rate contracts	6,664								5,466	622		576
Reallocation of noncontrolling interest	0				39,432					(39,432)
Equity, shares at Dec. 31, 2019			154,790,000
Equity, value at Dec. 31, 2019	$ 8,014,236	$ (1,679)	$ 1,548	200,000	6,294,719	(760,523)	$ (1,505)	(2,722)	(48,335)	600,860	$ (174)	1,728,689
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accounting Standards Update [Extensible List] | Accounting Standards Update 2018-09	Accounting Standards Update 2014-09 [Member]
Redemption of operating partnership units to common stock, shares			857,000
Redemption of operating partnership units to common stock, value	$ 0		$ 9		29,689					(29,698)
Allocated net income for the year	1,018,691					872,727				97,704		48,260
Dividends/distributions declared	(689,273)					(620,352)				(68,921)
Shares issued pursuant to stock purchase plan, shares			7,000
Shares issued pursuant to stock purchase plan, value	759				759
Net activity from stock option and incentive plan, shares			65,000
Net activity from stock option and incentive plan, value	48,621				9,303					39,318
Issuance of operating partnership units for 360 Park Avenue South	0
Preferred Stock Redemption Charge	0
Contributions from noncontrolling interests in property partnerships	8,219											8,219
Distributions to noncontrolling interests in property partnerships	(58,811)											(58,811)
Effective portion of interest rate contracts	(7,848)								(7,066)	(782)
Amortization of interest rate contracts	6,697								5,511	610		576
Reallocation of noncontrolling interest	$ 0				22,321					(22,321)
Equity, shares at Dec. 31, 2020	155,718,825		155,719,000
Equity, value at Dec. 31, 2020	$ 8,339,612		$ 1,557	200,000	6,356,791	(509,653)		(2,722)	(49,890)	616,596		1,726,933
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Redemption of operating partnership units to common stock, shares			524,000
Redemption of operating partnership units to common stock, value	0		$ 5		18,381					(18,386)
Allocated net income for the year	631,932					505,195				55,931		70,806
Dividends/distributions declared	(683,843)					(615,021)				(68,822)
Shares issued pursuant to stock purchase plan, shares			9,000
Shares issued pursuant to stock purchase plan, value	1,004				1,004
Net activity from stock option and incentive plan, shares			293,000
Net activity from stock option and incentive plan, value	71,383		$ 3		25,607					45,773
Issuance of operating partnership units for 360 Park Avenue South	99,689									99,689
Preferred Stock, Redeemed	(193,623)			(200,000)	6,377
Preferred Stock Redemption Charge	(6,412)					(6,412)
Contributions from noncontrolling interests in property partnerships	18,002											18,002
Distributions to noncontrolling interests in property partnerships	(259,764)											(259,764)
Effective portion of interest rate contracts	8,544								7,703	841
Amortization of interest rate contracts	6,704								5,525	603		576
Reallocation of noncontrolling interest	$ 0				89,570					(89,570)
Equity, shares at Dec. 31, 2021	156,544,849		156,545,000
Equity, value at Dec. 31, 2021	$ 8,033,228		$ 1,565	$ 0	$ 6,497,730	$ (625,891)		$ (2,722)	$ (36,662)	$ 642,655		$ 1,556,553