Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Net increase (decrease) in shareholders' equity resulting from operations
Net income (loss) attributable to common stockholders	$ 46,203	$ 17,293	$ (45,917)	$ 45,345
Add: Net income (loss) attributable to Convertible Non-controlling Interests	647	387	(916)	1,079
Net income (loss) related to common stockholders and Convertible Non-controlling Interests	46,850	17,680	(46,833)	46,424
Dividends Paid:
Dividends	(11,987)	(14,494)	(43,141)	(44,059)
Undistributed (Distributed in excess of) earnings:
Total undistributed (distributed in excess of) earnings	$ 34,863	$ 3,186	$ (89,974)	$ 2,365
Weighted average shares outstanding (basic and diluted):
Weighted average shares outstanding (basic and diluted) (in shares)	44,392,453	33,571,441	44,023,004	31,521,820
Basic earnings per share of common stock:
Distributed (in usd per share)	$ 0.27	$ 0.42	$ 0.97	$ 1.39
Undistributed (Distributed in excess of) (in usd per share)	0.79	0.11	(2.03)	0.08
Basic earnings per common share (in usd per share)	1.06	0.53	(1.06)	1.47
Diluted earnings per share of common stock:
Distributed (in usd per share)	0.27	0.42	0.97	1.39
Undistributed (Distributed in excess of) (usd per share)	0.79	0.11	(2.03)	0.08
Diluted earnings per common share (in usd per share)	$ 1.06	$ 0.53	$ (1.06)	$ 1.47
Net increase (decrease) in equity resulting from operations	$ 900	$ 1,000	$ 2,800	$ 2,400
Net increase (decrease) in equity resulting from operations	900	1,000	2,800	2,400
Common Stock
Dividends Paid:
Dividends	(11,821)	(14,185)	(42,514)	(43,038)
Undistributed (Distributed in excess of) earnings:
Total undistributed (distributed in excess of) earnings	$ 34,382	$ 3,108	$ (88,431)	$ 2,307
Weighted average shares outstanding (basic and diluted):
Weighted average shares outstanding (basic and diluted) (in shares)	43,779,134	32,835,652	43,387,168	30,787,634
Non-controlling Interest
Dividends Paid:
Dividends	$ (166)	$ (309)	$ (627)	$ (1,021)
Undistributed (Distributed in excess of) earnings:
Total undistributed (distributed in excess of) earnings	$ 481	$ 78	$ (1,543)	$ 58
Weighted average shares outstanding (basic and diluted):
Weighted average shares outstanding (basic and diluted) (in shares)	613,319	735,789	635,836	734,186