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, 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
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	0	0	27,791	27,791
Dividends paid on common stock	0	0	(2,615)	(2,615)
BALANCE at Dec. 31, 2012	422	11,693	123,743	135,858
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	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