Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Net increase (decrease) in shareholders' equity resulting from operations
Net income (loss) attributable to common stockholders	$ 32,655	$ 37,278	$ 70,511	$ (92,120)
Add: Net income (loss) attributable to Convertible Non-controlling Interests	505	519	1,082	(1,563)
Net income (loss) related to common stockholders and Convertible Non-controlling Interests	33,160	37,797	71,593	(93,683)
Dividends Paid:
Dividends	(19,563)	(11,097)	(32,897)	(31,154)
Undistributed (Distributed in excess of) earnings:
Total undistributed (distributed in excess of) earnings	$ 13,597	$ 26,700	$ 38,696	$ (124,837)
Weighted average shares outstanding (basic and diluted):
Weighted average shares outstanding (basic and diluted) (in shares)	44,459,862	44,388,860	44,454,055	43,836,249
Basic earnings per share of common stock:
Distributed (in usd per share)	$ 0.44	$ 0.25	$ 0.74	$ 0.70
Undistributed (Distributed in excess of) (in usd per share)	0.31	0.60	0.87	(2.83)
Basic earnings per common share (in usd per share)	0.75	0.85	1.61	(2.13)
Diluted earnings per share of common stock:
Distributed (in usd per share)	0.44	0.25	0.74	0.70
Undistributed (Distributed in excess of) (usd per share)	0.31	0.60	0.87	(2.83)
Diluted earnings per common share (in usd per share)	$ 0.75	$ 0.85	$ 1.61	$ (2.13)
Net increase (decrease) in equity resulting from operations	$ 1,400	$ 700	$ 2,300	$ 1,900
Net increase (decrease) in equity resulting from operations	1,400	700	2,300	1,900
Common Stock
Dividends Paid:
Dividends	(19,265)	(10,945)	(32,399)	(30,693)
Undistributed (Distributed in excess of) earnings:
Total undistributed (distributed in excess of) earnings	$ 13,390	$ 26,333	$ 38,112	$ (122,813)
Weighted average shares outstanding (basic and diluted):
Weighted average shares outstanding (basic and diluted) (in shares)	43,781,684	43,779,924	43,781,684	43,189,031
Non-controlling Interest
Dividends Paid:
Dividends	$ (298)	$ (152)	$ (498)	$ (461)
Undistributed (Distributed in excess of) earnings:
Total undistributed (distributed in excess of) earnings	$ 207	$ 367	$ 584	$ (2,024)
Weighted average shares outstanding (basic and diluted):
Weighted average shares outstanding (basic and diluted) (in shares)	678,178	608,936	672,371	647,218