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	2,681			2,681
Dividends paid on common stock	(2,784)			(2,784)
Ending balance at Sep. 30, 2016	152,407	422	11,693	140,292
Beginning balance at Dec. 31, 2016	151,312	422	11,693	139,197
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (losses) earnings	(4,175)			(4,175)
Dividends paid on common stock	(2,784)			(2,784)
Ending balance at Sep. 30, 2017	$ 144,353	$ 422	$ 11,693	$ 132,238