CONSOLIDATED STATEMENTS OF EQUITY - USD ($) shares in Thousands, $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Series A Preferred Stock	Series B Preferred Stock	Total stockholders' Equity	Total stockholders' Equity Cumulative Effect, Period of Adoption, Adjustment	Total stockholders' Equity Series A Preferred Stock	Total stockholders' Equity Series B Preferred Stock	Preferred stock	Preferred stock Series A Preferred Stock	Preferred stock Series B 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 Cumulative Effect, Period of Adoption, Adjustment	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, 2017									0			50,702
Beginning balance at Dec. 31, 2017	$ 990,656				$ 877,414				$ 0			$ 507	$ 1,049,176	$ 1,283	$ (173,552)				$ 113,242
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net share activity through equity award plan (in shares)												421
Net share activity through equity award plan	(1,788)				(2,713)							$ 4	(2,717)						925
Increase (decrease) in fair value of derivative contracts	895				790									790					105
Foreign currency translation adjustments	0
Equity-based compensation expense	18,100				16,014								16,014						2,086
Proceeds net of fees from common equity offering (in shares)										4,280	3,163
Proceeds net of fees from common equity offering			$ 103,212	$ 304,265			$ 103,212	$ 304,265		$ 103,212	$ 304,265
Dividends declared on preferred stock			(6,046)	(10,621)			(6,046)	(10,621)									$ (6,046)	$ (10,621)
Dividends declared to common stockholders	(83,869)				(83,869)										(83,869)
Dividends declared to noncontrolling interests	(10,942)				0														(10,942)
Net income (loss)	(7,175)				(4,460)										(4,460)				(2,715)
Ending balance at Dec. 31, 2018	$ 1,296,687	$ (1,813)			1,193,986	$ (1,813)			$ 407,477			$ 511	1,062,473	2,073	(278,548)	$ (1,813)			102,701
Ending balance (in shares) at Dec. 31, 2018									7,443			51,123
Accounting Standards Update [Extensible List]	us-gaap:AccountingStandardsUpdate201602Member
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net share activity through equity award plan (in shares)												273
Net share activity through equity award plan	$ 1,825				1,819							$ 3	1,816						6
Increase (decrease) in fair value of derivative contracts	(29,843)				(26,745)									(26,745)					(3,098)
Foreign currency translation adjustments	34				30									30					4
Equity-based compensation expense	16,413				14,651								14,651						1,762
Proceeds net of fees from settlement of forward shares (in shares)												2,832
Proceeds net of fees from settlement of forward shares	109,527				102,882							$ 28	102,854						6,645
Adjustment to expenses net from Series B Convertible Preferred stock offering			(42)				(42)			$ (42)
Proceeds net of fees from common equity offering (in shares)												4,000
Proceeds net of fees from common equity offering	158,663				148,690							$ 40	148,650						9,973
Dividends declared on preferred stock			(7,624)	(20,556)			(7,624)	(20,556)									(7,624)	(20,556)
Dividends declared to common stockholders	(98,752)				(98,752)										(98,752)
Dividends declared to noncontrolling interests	(11,733)				0														(11,733)
Net income (loss)	31,665				31,291										31,291				374
Ending balance at Dec. 31, 2019	1,444,451				1,337,817				$ 407,435			$ 582	1,330,444	(24,642)	(376,002)				106,634
Ending balance (in shares) at Dec. 31, 2019									7,443			58,228
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net share activity through equity award plan (in shares)												341
Net share activity through equity award plan	(1,860)				(1,671)							$ 4	(1,675)						(189)
Conversion of Class A Partnership units to Class A common stock (in shares)												100
Conversion of Class A Partnership units to Class A common stock	0				2,290							$ 1	2,289						(2,290)
Increase (decrease) in fair value of derivative contracts	(28,295)				(25,980)									(25,980)					(2,315)
Foreign currency translation adjustments	187				171									171					16
Equity-based compensation expense	26,980				24,353								24,353						2,627
Proceeds net of fees from settlement of forward shares (in shares)												5,911
Proceeds net of fees from settlement of forward shares	285,353				267,505							$ 59	267,446						17,848
Dividends declared on preferred stock			$ (7,624)	$ (20,556)			$ (7,624)	$ (20,556)									$ (7,624)	$ (20,556)
Dividends declared to common stockholders	(116,037)				(116,037)										(116,037)
Dividends declared to noncontrolling interests	(12,477)				0														(12,477)
Net income (loss)	14,576				15,906										15,906				(1,330)
Ending balance at Dec. 31, 2020	$ 1,584,698				$ 1,476,174				$ 407,435			$ 646	$ 1,622,857	$ (50,451)	$ (504,313)				$ 108,524
Ending balance (in shares) at Dec. 31, 2020									7,443			64,580