Consolidated Statements of Changes in Stockholders' Equity (Unaudited) (USD $) In Thousands, unless otherwise specified	Common Stock [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Loss [Member]	Total
Balance at Dec. 31, 2011	$ 8,675	$ 133,945	$ (1,321)	$ 141,299
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	0	4,429	0	4,429
Other comprehensive loss, net of tax	0	0	(936)	(936)
Balance at Mar. 31, 2012	8,675	138,374	(2,257)	144,792
Balance at Dec. 31, 2012	8,685	144,162	(2,738)	150,109
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	0	4,216	0	4,216
Other comprehensive loss, net of tax	0	0	(965)	(965)
Balance at Mar. 31, 2013	$ 8,685	$ 148,378	$ (3,703)	$ 153,360