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
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)
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
Ending balance at Mar. 31, 2019		$ 592,434	562,209	$ 30	664,654	(102,475)	30,225
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
Stock Issued During Period, Shares, New Issues		4,025,000
Shares Issued As Payment of Incentive Fee, Shares		0
Repurchase of shares of common stock (in shares)		(50,825)
Repurchase of shares of common stock		$ (800)
Ending balance (in shares) at Sep. 30, 2019		33,774,386		33,774,386
Ending balance at Sep. 30, 2019		$ 668,967	635,446	$ 34	734,628	(99,216)	33,521
CHANGE IN SHAREHOLDERS’ EQUITY RESULTING FROM OPERATIONS
Dividends declared (in usd per share)		$ 1.39
Preferred Stock, Value, Outstanding		$ 0
Beginning balance (in shares) at Mar. 31, 2019				29,745,776
Beginning balance at Mar. 31, 2019		592,434	562,209	$ 30	664,654	(102,475)	30,225
CHANGE IN SHAREHOLDERS’ EQUITY RESULTING FROM OPERATIONS
Net income (loss)		13,656	12,644			12,644	1,012
Contributions from non-controlling interests		4,936					4,936
Dividends	[2]	(12,801)	(12,493)			(12,493)	(308)
Distributions to non-controlling interests		(5,225)					(5,225)
Share-based long term incentive plan unit awards		$ 114	110		110		4
Ending balance (in shares) at Jun. 30, 2019		29,745,776		29,745,776
Ending balance at Jun. 30, 2019		$ 593,114	562,470	$ 30	664,764	(102,324)	30,644
CHANGE IN SHAREHOLDERS’ EQUITY RESULTING FROM OPERATIONS
Preferred Stock, Value, Outstanding		0
Net income (loss)		$ 18,712	17,293			17,293	1,419
Stock Issued During Period, Shares, New Issues		4,025,000						4,025,000	[3]
Stock Issued During Period, Value, New Issues	[3]							$ 69,810		$ 69,810	$ 4	$ 69,806
Shares Issued As Payment of Incentive Fee, Shares		0
Contributions from non-controlling interests		$ 9,428					9,428
Dividends	[2]	(14,494)	(14,185)			(14,185)	(309)
Distributions to non-controlling interests		$ (7,719)					(7,719)
Adjustment to non-controlling interests			(56)		(56)		56
Stock issued during period, shares, conversion of units								(3,610)
Repurchase of shares of common stock (in shares)		0
Share-based long term incentive plan unit awards		$ 116	114		114		2
Ending balance (in shares) at Sep. 30, 2019		33,774,386		33,774,386
Ending balance at Sep. 30, 2019		$ 668,967	635,446	$ 34	734,628	(99,216)	33,521
CHANGE IN SHAREHOLDERS’ EQUITY RESULTING FROM OPERATIONS
Dividends declared (in usd per share)		$ 0.42
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	[3]							5,290,000
Stock Issued During Period, Value, New Issues	[3]							$ 95,292		95,292	5	95,287
Shares Issued As Payment of Incentive Fee, Shares								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	[4]	(1,941)	(1,941)			(1,941)	0
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)
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
Ending balance at Mar. 31, 2020		$ 809,481	774,383	$ 44	916,006	(252,701)	35,098
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
Stock Issued During Period, Shares, New Issues		5,290,000
Shares Issued As Payment of Incentive Fee, Shares		637
Repurchase of shares of common stock (in shares)		(290,050)
Repurchase of shares of common stock		$ (3,100)
Ending balance (in shares) at Sep. 30, 2020		43,781,684		43,781,684
Ending balance at Sep. 30, 2020		$ 872,277	835,130	$ 44	916,038	(191,986)	37,147
CHANGE IN SHAREHOLDERS’ EQUITY RESULTING FROM OPERATIONS
Dividends declared (in usd per share)		$ 0.97
Preferred Stock, Dividends Per Share, Declared		$ 0.84375
Preferred Stock, Value, Outstanding		$ 111,034
Beginning balance (in shares) at Mar. 31, 2020				43,779,924
Beginning balance at Mar. 31, 2020		809,481	774,383	$ 44	916,006	(252,701)	35,098
CHANGE IN SHAREHOLDERS’ EQUITY RESULTING FROM OPERATIONS
Net income (loss)		40,439	39,219			39,219	1,220
Contributions from non-controlling interests		2,895					2,895
Dividends	[2]	(11,097)	(10,945)			(10,945)	(152)
Dividends, Preferred Stock, Cash	[4]	(1,941)	(1,941)			(1,941)	0
Distributions to non-controlling interests		(2,280)					(2,280)
Share-based long term incentive plan unit awards		$ 182	180		180		2
Ending balance (in shares) at Jun. 30, 2020		43,779,924		43,779,924
Ending balance at Jun. 30, 2020		$ 837,679	800,896	$ 44	916,186	(226,368)	36,783
CHANGE IN SHAREHOLDERS’ EQUITY RESULTING FROM OPERATIONS
Preferred Stock, Value, Outstanding		111,034
Net income (loss)		$ 49,702	48,143			48,143	1,559
Stock Issued During Period, Shares, New Issues		0
Shares Issued As Payment of Incentive Fee, Shares		0
Contributions from non-controlling interests		$ 1,199					1,199
Dividends	[2]	(11,987)	(11,821)			(11,821)	(166)
Dividends, Preferred Stock, Cash	[4]	(1,940)	(1,940)			(1,940)	0
Distributions to non-controlling interests		$ (2,541)					(2,541)
Adjustment to non-controlling interests			(369)		(369)		369
Stock issued during period, shares, conversion of units				3,638				0
Stock Issued During Period, Value, Conversion of Units			59		59		59
Repurchase of shares of common stock (in shares)		(1,878)		(1,878)
Repurchase of shares of common stock		$ (21)	(21)		(21)
Share-based long term incentive plan unit awards		$ 186	183		183		3
Ending balance (in shares) at Sep. 30, 2020		43,781,684		43,781,684
Ending balance at Sep. 30, 2020		$ 872,277	$ 835,130	$ 44	$ 916,038	$ (191,986)	$ 37,147
CHANGE IN SHAREHOLDERS’ EQUITY RESULTING FROM OPERATIONS
Dividends declared (in usd per share)		$ 0.27
Preferred Stock, Dividends Per Share, Declared		$ 0.421875
Preferred Stock, Value, Outstanding		$ 111,034

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

[2] For the three-month periods ended September 30, 2020 and 2019, dividends totaling $0.27 and $0.42, respectively, per share of common stock and convertible unit outstanding, were declared. For the nine-month periods ended September 30, 2020 and 2019, dividends totaling $0.97 and $1.39, respectively, per share of common stock and convertible unit outstanding, were declared.

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

[4] For the three- and nine-month periods ended September 30, 2020, dividends totaling $0.421875 and $0.84375, respectively, per share of preferred stock was declared.