INTERIM CONSOLIDATED STATEMENTS OF EQUITY - USD ($) shares in Thousands, $ in Thousands	Total	Series A Preferred Stock	Series B Preferred Stock	Total stockholders' equity	Total stockholders' equity Series A Preferred Stock	Total stockholders' equity Series B Preferred Stock	Preferred Stock	Common stock	Additional paid-in capital	Accumulated other comprehensive income (loss)	Accumulated dividends in excess of earnings	Accumulated dividends in excess of earnings Series A Preferred Stock	Accumulated dividends in excess of earnings Series B Preferred Stock	Noncontrolling interests
Beginning balance (in shares) at Dec. 31, 2019							7,443	58,228
Beginning balance at Dec. 31, 2019	$ 1,444,451			$ 1,337,817			$ 407,435	$ 582	$ 1,330,444	$ (24,642)	$ (376,002)			$ 106,634
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net share activity through equity award plan (in shares)								240
Net share activity through equity award plan	(1,458)			(1,309)				$ 3	(1,312)					(149)
Increase (decrease) in fair value of derivative contracts	(36,715)			(33,155)						(33,155)				(3,560)
Foreign currency translation adjustments	(223)			(201)						(201)				(22)
Equity-based compensation expense	4,875			4,377					4,377					498
Proceeds net of fees from settlement of forward shares (in shares)								1,930
Proceeds net of fees from settlement of forward shares	83,217			78,535				$ 19	78,516					4,682
Dividends declared on Preferred Stock	(7,045)	$ (1,906)	$ (5,139)		$ (1,906)	$ (5,139)						$ (1,906)	$ (5,139)
Dividends declared to common stockholders	(28,393)			(28,393)							(28,393)
Dividends declared to noncontrolling interests	(3,133)			0										(3,133)
Net income	8,120			8,010							8,010			110
Ending balance (in shares) at Mar. 31, 2020							7,443	60,398
Ending balance at Mar. 31, 2020	1,463,696			1,358,636			$ 407,435	$ 604	1,412,025	(57,998)	(403,430)			105,060
Beginning balance (in shares) at Dec. 31, 2020							7,443	64,580
Beginning balance at Dec. 31, 2020	1,584,698			1,476,174			$ 407,435	$ 646	1,622,857	(50,451)	(504,313)			108,524
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net share activity through equity award plan (in shares)								426
Net share activity through equity award plan	59			54				$ 4	50					5
Conversion of Class A Partnership units to Class A common stock (in shares)								92
Conversion of Class A Partnership units to Class A common stock	0			2,041				$ 1	2,040					(2,041)
Increase (decrease) in fair value of derivative contracts	17,253			15,414						15,414				1,839
Foreign currency translation adjustments	(158)			(144)						(144)				(14)
Equity-based compensation expense	6,856			6,237					6,237					619
Proceeds net of fees from settlement of forward shares (in shares)								3,865
Proceeds net of fees from settlement of forward shares	215,846			203,164				$ 39	203,125					12,682
Dividends declared on Preferred Stock	(7,045)	$ (1,906)	$ (5,139)		$ (1,906)	$ (5,139)						$ (1,906)	$ (5,139)
Dividends declared to common stockholders	(32,512)			(32,512)							(32,512)
Dividends declared to noncontrolling interests	(3,235)			0										(3,235)
Net income	7,918			7,839							7,839			79
Ending balance (in shares) at Mar. 31, 2021							7,443	68,963
Ending balance at Mar. 31, 2021	$ 1,789,680			$ 1,671,222			$ 407,435	$ 690	$ 1,834,309	$ (35,181)	$ (536,031)			$ 118,458