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	175,309					174,943	174,943	366
Common stock issued pursuant to stock based compensation	(1,265)		60	(1,325)			(1,265)
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	1,284		(1)	1,285			1,284
Contributions from nonredeemable noncontrolling interests	1,036							1,036
Distributions to nonredeemable noncontrolling interests	(638)							(638)
Common dividends	(44,563)					(44,563)	(44,563)
Ending balance at Mar. 31, 2020	4,558,998	0	151,125	5,538,875	(148,473)	(1,006,820)	4,534,707	24,291
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	29,311					29,110	29,110	201
Common stock issued pursuant to stock based compensation	(783)		91	(874)			(783)
Amortization of stock options, restricted stock, and restricted stock units, net of forfeitures	1,661			1,661			1,661
Contributions from nonredeemable noncontrolling interests	1,695							1,695
Distributions to nonredeemable noncontrolling interests	(7)							(7)
Common dividends	(46,167)					(46,167)	(46,167)
Ending balance at Mar. 31, 2021	$ 4,481,248	$ 0	$ 151,240	$ 5,543,549	$ (148,473)	$ (1,095,361)	$ 4,450,955	$ 30,293