CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (USD $) In Thousands, unless otherwise specified	Common Stock [Member]	Contributed Capital [Member]	Retained Earnings [Member]	Total
BALANCE at Dec. 31, 2008	$ 422	$ 11,693	$ 69,646	$ 81,761
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	0	0	4,149	4,149
Dividends paid on common stock	0	0	(2,109)	(2,109)
BALANCE at Dec. 31, 2009	422	11,693	71,686	83,801
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	0	0	8,631	8,631
Dividends paid on common stock	0	0	(2,277)	(2,277)
BALANCE at Dec. 31, 2010	422	11,693	78,040	90,155
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	0	0	22,931	22,931
Dividends paid on common stock	0	0	(2,404)	(2,404)
BALANCE at Dec. 31, 2011	$ 422	$ 11,693	$ 98,567	$ 110,682