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		$ 0
Beginning balance (in shares) at Dec. 31, 2018		29,796,601		29,796,601
Beginning balance at Dec. 31, 2018		$ 595,170	$ 563,833	$ 0	$ 665,356	$ (101,523)	$ 31,337
CHANGE IN SHAREHOLDERS’ EQUITY RESULTING FROM OPERATIONS
Share conversion	[1]			$ 30	(30)
Net income (loss)		$ 16,488	15,408			15,408	1,080
Stock Issued During Period, Shares, New Issues		0
Shares Issued As Payment of Incentive Fee, Shares		0
Contributions from non-controlling interests		$ 2,512					2,512
Dividends	[2]	(16,764)	(16,360)			(16,360)	(404)
Distributions to non-controlling interests		$ (4,306)					(4,306)
Adjustment to non-controlling interests			(4)		(4)		4
Repurchase of shares of common stock (in shares)		(50,825)		(50,825)
Repurchase of shares of common stock		$ (782)	(782)		(782)
Share-based long term incentive plan unit awards		$ 116	114		114		2
Ending balance (in shares) at Mar. 31, 2019		29,745,776		29,745,776
Ending balance at Mar. 31, 2019		$ 592,434	562,209	$ 30	664,654	(102,475)	30,225
CHANGE IN SHAREHOLDERS’ EQUITY RESULTING FROM OPERATIONS
Dividends declared (in usd per share)		$ 0.55
Preferred Stock, Value, Outstanding		$ 0
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)		$ (128,342)	(127,457)			(127,457)	(885)
Stock Issued During Period, Shares, New Issues		5,290,000						5,290,000	[3]
Stock Issued During Period, Value, New Issues	[3]							$ 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		(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

[1] See Note 1 for further details on the share conversion.

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

[3] For the three-month periods ended March 31, 2020 and 2019, dividends totaling $0.45 and $0.55, respectively, per share of common stock and convertible unit outstanding, were declared.