CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Common Stock [Member]	Contributed Capital [Member]	Retained Earnings [Member]	Total
BALANCE at Dec. 31, 2012	$ 422	$ 11,693	$ 123,743	$ 135,858
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings (loss)	0	0	21,610	21,610
Dividends paid on common stock	0	0	(2,783)	(2,783)
BALANCE at Dec. 31, 2013	422	11,693	142,570	154,685
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings (loss)	0	0	6,523	6,523
Dividends paid on common stock	0	0	(3,711)	(3,711)
BALANCE at Dec. 31, 2014	422	11,693	145,382	157,497
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings (loss)	0	0	(1,275)	(1,275)
Dividends paid on common stock	0	0	(3,712)	(3,712)
BALANCE at Dec. 31, 2015	$ 422	$ 11,693	$ 140,395	$ 152,510