Condensed 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, 2018	$ 2,821,156	$ 1,717	$ 107,681	$ 3,934,385	$ (148,473)	$ (1,129,445)	$ 2,765,865	$ 55,291
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	13,423					12,932	12,932	491
Common stock issued in merger	1,598,189		41,576	1,556,613			1,598,189
Common stock issued pursuant to stock based compensation	509		91	418			509
Amortization of stock options, restricted stock, and restricted stock units, net of forfeitures	1,232			1,232			1,232
Nonredeemable noncontrolling interests acquired in merger	5,187							5,187
Contributions from nonredeemable noncontrolling interests	4,241							4,241
Distributions to nonredeemable noncontrolling interests	(1,265)							(1,265)
Common dividends	(73,054)					(73,054)	(73,054)
Ending balance at Jun. 30, 2019	4,369,618	1,717	149,348	5,492,648	(148,473)	(1,189,567)	4,305,673	63,945
Beginning balance at Mar. 31, 2019	2,828,229	1,717	107,731	3,934,038	(148,473)	(1,124,596)	2,770,417	57,812
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(22,582)					(22,409)	(22,409)	(173)
Common stock issued in merger	1,598,189		41,576	1,556,613			1,598,189
Common stock issued pursuant to stock based compensation	1,414		41	1,373			1,414
Amortization of stock options, restricted stock, and restricted stock units, net of forfeitures	624			624			624
Nonredeemable noncontrolling interests acquired in merger	5,187							5,187
Contributions from nonredeemable noncontrolling interests	1,660							1,660
Distributions to nonredeemable noncontrolling interests	(541)							(541)
Common dividends	(42,562)					(42,562)	(42,562)
Ending balance at Jun. 30, 2019	4,369,618	1,717	149,348	5,492,648	(148,473)	(1,189,567)	4,305,673	63,945
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 (loss)	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	0	151,125	5,538,875	(148,473)	(1,006,820)	4,534,707	24,291
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	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