Earnings (Loss) Per Share - Schedule of Computation of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Earnings Per Share [Abstract]
Net Income (Loss)	$ 1,093	$ 27,931	$ 23,229	$ 23,827	$ 5,643	$ 20,523	$ 28	$ 13,745	$ 76,080	$ 39,939	$ 48,763
Noncontrolling interests									(551)	(2,927)	(261)
Net Income (Loss) Attributable to Stockholders									75,529	37,012	48,502
Preferred stockholder dividends									(8,337)	(8,336)	0
Net Income (Loss) Attributable to Common Stockholders	$ 77	$ 24,913	$ 20,986	$ 21,216	$ 3,414	$ 16,708	$ (2,389)	$ 10,943	$ 67,192	$ 28,676	$ 48,502
Shares (in thousands):
Basic: Weighted-average number of shares outstanding (in shares)									7,174	7,013	7,648
Plus: Incremental shares from assumed conversion of dilutive instruments (in shares)									1,353	234	174
Diluted: Weighted-average number of shares outstanding (in shares)									8,527	7,247	7,822
Earnings per share—basic (in $ per share)	$ 0.01	$ 3.47	$ 2.91	$ 2.95	$ 0.48	$ 2.32	$ (0.34)	$ 1.67	$ 9.37	$ 4.09	$ 6.34
Earnings per share—diluted (in $ per share)	$ 0.01	$ 3.19	$ 2.75	$ 2.77	$ 0.46	$ 2.21	$ (0.34)	$ 1.62	$ 8.86	$ 3.96	$ 6.20