Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Net increase (decrease) in shareholders' equity resulting from operations
Net income (loss) attributable to common stockholders	$ 37,278	$ 12,644	$ (92,120)	$ 28,052
Add: Net income (loss) attributable to Convertible Non-controlling Interests	519	312	(1,563)	692
Net income (loss) related to common stockholders and Convertible Non-controlling Interests	37,797	12,956	(93,683)	28,744
Dividends Paid:
Dividends	(11,097)	(12,801)	(31,154)	(29,565)
Undistributed (Distributed in excess of) earnings:
Total undistributed (distributed in excess of) earnings	$ 26,700	$ 155	$ (124,837)	$ (821)
Weighted average shares outstanding (basic and diluted):
Weighted average shares outstanding (basic and diluted) (in shares)	44,388,860	30,479,147	43,836,249	30,480,023
Basic earnings per share of common stock:
Distributed (in usd per share)	$ 0.25	$ 0.42	$ 0.70	$ 0.97
Undistributed (Distributed in excess of) (in usd per share)	0.60	0.01	(2.83)	(0.03)
Basic earnings per common share (in usd per share)	0.85	0.43	(2.13)	0.94
Diluted earnings per share of common stock:
Distributed (in usd per share)	0.25	0.42	0.70	0.97
Undistributed (Distributed in excess of) (usd per share)	0.60	0.01	(2.83)	(0.03)
Diluted earnings per common share (in usd per share)	$ 0.85	$ 0.43	$ (2.13)	$ 0.94
Net increase (decrease) in equity resulting from operations	$ 700	$ 700	$ 1,900	$ 1,400
Common Stock
Dividends Paid:
Dividends	(10,945)	(12,493)	(30,693)	(28,853)
Undistributed (Distributed in excess of) earnings:
Total undistributed (distributed in excess of) earnings	$ 26,333	$ 151	$ (122,813)	$ (801)
Weighted average shares outstanding (basic and diluted):
Weighted average shares outstanding (basic and diluted) (in shares)	43,779,924	29,745,776	43,189,031	29,746,652
Non-controlling Interest
Dividends Paid:
Dividends	$ (152)	$ (308)	$ (461)	$ (712)
Undistributed (Distributed in excess of) earnings:
Total undistributed (distributed in excess of) earnings	$ 367	$ 4	$ (2,024)	$ (20)
Weighted average shares outstanding (basic and diluted):
Weighted average shares outstanding (basic and diluted) (in shares)	608,936	733,371	647,218	733,371