Consolidated Statements of Equity - USD ($) $ in Thousands	Total	Preferred Stock	Common Stock	Additional Paid-In Capital	Treasury Stock	Distributions in Excess of Net Income	Stockholders’ Investment	Nonredeemable Noncontrolling Interests
Beginning balance at Dec. 31, 2019	$ 4,427,835	$ 1,717	$ 149,347	$ 5,493,883	$ (148,473)	$ (1,137,200)	$ 4,359,274	$ 68,561
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	198,545					198,044	198,044	501
Common stock issued pursuant to stock based compensation	(307)		90	(397)			(307)
Common stock issued pursuant to unitholder redemption	0	(1,717)	1,719	45,032			45,034	(45,034)
Amortization of stock options, restricted stock, and restricted stock units, net of forfeitures	2,424		(3)	2,427			2,424
Contributions from nonredeemable noncontrolling interests	1,816							1,816
Distributions to nonredeemable noncontrolling interests	(851)							(851)
Common dividends	(89,133)					(89,133)	(89,133)
Ending balance at Jun. 30, 2020	4,540,329	0	151,153	5,540,945	(148,473)	(1,028,289)	4,515,336	24,993
Beginning balance at Mar. 31, 2020	4,558,998		151,125	5,538,875	(148,473)	(1,006,820)	4,534,707	24,291
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	23,236					23,101	23,101	135
Common stock issued pursuant to stock based compensation	958		30	928			958
Amortization of stock options, restricted stock, and restricted stock units, net of forfeitures	1,140		(2)	1,142			1,140
Contributions from nonredeemable noncontrolling interests	780							780
Distributions to nonredeemable noncontrolling interests	(213)							(213)
Common dividends	(44,570)					(44,570)	(44,570)
Ending balance at Jun. 30, 2020	4,540,329	0	151,153	5,540,945	(148,473)	(1,028,289)	4,515,336	24,993
Beginning balance at Dec. 31, 2020	4,495,538	0	151,149	5,542,762	(148,473)	(1,078,304)	4,467,134	28,404
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	57,371					57,263	57,263	108
Common stock issued pursuant to stock based compensation	552		126	426			552
Amortization of stock options, restricted stock, and restricted stock units, net of forfeitures	3,146		(2)	3,148			3,146
Contributions from nonredeemable noncontrolling interests	3,382							3,382
Distributions to nonredeemable noncontrolling interests	(353)							(353)
Common dividends	(92,232)					(92,232)	(92,232)
Ending balance at Jun. 30, 2021	4,467,404	0	151,273	5,546,336	(148,473)	(1,113,273)	4,435,863	31,541
Beginning balance at Mar. 31, 2021	4,481,248		151,240	5,543,549	(148,473)	(1,095,361)	4,450,955	30,293
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	28,060					28,153	28,153	(93)
Common stock issued pursuant to stock based compensation	1,335		35	1,300			1,335
Amortization of stock options, restricted stock, and restricted stock units, net of forfeitures	1,485		(2)	1,487			1,485
Contributions from nonredeemable noncontrolling interests	1,687							1,687
Distributions to nonredeemable noncontrolling interests	(346)							(346)
Common dividends	(46,065)					(46,065)	(46,065)
Ending balance at Jun. 30, 2021	$ 4,467,404	$ 0	$ 151,273	$ 5,546,336	$ (148,473)	$ (1,113,273)	$ 4,435,863	$ 31,541