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
	Mar. 31, 2019	Mar. 31, 2018
Earnings Per Share [Abstract]
Net Income (Loss)	$ 22,468	$ 23,827
Noncontrolling interests	(722)	(527)
Net Income (Loss) Attributable to Stockholders	21,746	23,300
Preferred stockholder dividends	(2,084)	(2,084)
Net Income (Loss) Attributable to Common Stockholders	$ 19,662	$ 21,216
Shares:
Basic: Weighted-average number of common shares outstanding (in shares)	7,015	7,197
Plus: Incremental shares from assumed conversion of dilutive instruments (in shares)	1,307	1,214
Diluted: Weighted-average number of common shares outstanding (in shares)	8,322	8,411
Earnings (Loss) per share—Basic (in $ per share)	$ 2.80	$ 2.95
Earnings (Loss) per Share—Diluted (in $ per share)	$ 2.61	$ 2.77