Condensed Consolidated Statement of Changes in Equity - USD ($) $ in Thousands		Total	Total Stockholders' Equity	Common Stock	Additional Paid-in Capital	Retained Earnings/(Accumulated Deficit)	Non-controlling Interest	Common Stock		Common Stock Total Stockholders' Equity	Common Stock Common Stock	Common Stock Additional Paid-in Capital
CHANGE IN SHAREHOLDERS’ EQUITY RESULTING FROM OPERATIONS
Preferred Stock, Value, Outstanding		$ 111,034
Beginning balance (in shares) at Dec. 31, 2019		38,647,943		38,647,943
Beginning balance at Dec. 31, 2019		$ 868,699	$ 829,265	$ 39	$ 821,747	$ (103,555)	$ 39,434
CHANGE IN SHAREHOLDERS’ EQUITY RESULTING FROM OPERATIONS
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest		$ (128,342)	(127,457)			(127,457)	(885)
Stock Issued During Period, Shares, New Issues		5,290,000						5,290,000	[1]
Stock Issued During Period, Value, New Issues	[1]							$ 95,292		$ 95,292	$ 5	$ 95,287
Shares Issued As Payment of Incentive Fee, Shares		637						637
Shares Issued As Payment of Incentive Fee								$ 12		$ 12	$ 0	$ 12
Contributions from non-controlling interests		$ 3,487					3,487
Dividends	[2]	(20,057)	(19,748)			(19,748)	(309)
Dividends, Preferred Stock, Cash	[3]	(1,941)	(1,941)			(1,941)
Distributions to non-controlling interests		$ (4,798)					(4,798)
Adjustment to non-controlling interests			(545)		(545)		545
Stock issued during period, shares, conversion of units				129,516
Stock Issued During Period, Value, Conversion of Units			2,378		2,378		2,378
Repurchase of shares of common stock (in shares)		(288,172)		(288,172)
Repurchase of shares of common stock		$ (3,035)	(3,035)		(3,035)
Share-based long term incentive plan unit awards		$ 164	162		162		2
Ending balance (in shares) at Mar. 31, 2020		43,779,924		43,779,924
Ending balance at Mar. 31, 2020		$ 809,481	774,383	$ 44	916,006	(252,701)	35,098
CHANGE IN SHAREHOLDERS’ EQUITY RESULTING FROM OPERATIONS
Dividends declared (in usd per share)		$ 0.45
Preferred Stock, Value, Outstanding		$ 111,034
Preferred Stock, Value, Outstanding		$ 111,034
Beginning balance (in shares) at Dec. 31, 2020		43,781,684		43,781,684
Beginning balance at Dec. 31, 2020		$ 921,572	885,215	$ 44	915,658	(141,521)	36,357
CHANGE IN SHAREHOLDERS’ EQUITY RESULTING FROM OPERATIONS
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest		$ 41,256	39,797			39,797	1,459
Stock Issued During Period, Shares, New Issues		0
Shares Issued As Payment of Incentive Fee, Shares		0
Contributions from non-controlling interests		$ 1,517					1,517
Dividends	[2]	(13,334)	(13,134)			(13,134)	(200)
Dividends, Preferred Stock, Cash	[3]	(1,941)	(1,941)			(1,941)
Distributions to non-controlling interests		$ (5,923)					(5,923)
Adjustment to non-controlling interests			(307)		(307)		307
Repurchase of shares of common stock (in shares)		0
Share-based long term incentive plan unit awards		$ 229	226		226		3
Ending balance (in shares) at Mar. 31, 2021		43,781,684		43,781,684
Ending balance at Mar. 31, 2021		$ 943,376	$ 909,856	$ 44	$ 915,577	$ (116,799)	$ 33,520
CHANGE IN SHAREHOLDERS’ EQUITY RESULTING FROM OPERATIONS
Dividends declared (in usd per share)		$ 0.30
Preferred Stock, Dividends Per Share, Declared		$ 0.421875
Preferred Stock, Value, Outstanding		$ 111,034

[1] Net of underwriters' discounts and offering costs.

[2] For the three-month periods ended March 31, 2021 and 2020, dividends totaling $0.30 and $0.45, respectively, per share of common stock and convertible unit outstanding, were declared.

[3] For the three-month period ended March 31, 2021 dividends totaling $0.421875 per share of preferred stock was declared. No such dividends were declared during the three-month period ended March 31, 2020.