UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock	Contributed Capital	Retained Earnings
Beginning balance at Dec. 31, 2015	$ 152,510	$ 422	$ 11,693	$ 140,395
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (losses) earnings	4,834			4,834
Dividends paid on common stock	(1,856)			(1,856)
Ending balance at Jun. 30, 2016	155,488	422	11,693	143,373
Beginning balance at Dec. 31, 2016	151,312	422	11,693	139,197
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (losses) earnings	(1,142)			(1,142)
Dividends paid on common stock	(1,856)			(1,856)
Ending balance at Jun. 30, 2017	$ 148,314	$ 422	$ 11,693	$ 136,199