Consolidated Statements of Changes in Stockholders' Equity (Unaudited) (USD $) In Thousands, unless otherwise specified	Common Stock [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Total
Balances at Dec. 31, 2010	$ 8,667	$ 123,161	$ (2,641)	$ 129,187
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	0	12,749	0	12,749
Dividends	0	(3,329)	0	(3,329)
Stock options exercised	5	57	0	62
Other comprehensive income (loss), net of taxes	0	0	3,151	3,151
Balances at Sep. 30, 2011	8,672	132,638	510	141,820
Balances at Dec. 31, 2011	8,675	133,945	(1,321)	141,299
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	0	13,062	0	13,062
Dividends	0	(3,678)	0	(3,678)
Stock options exercised	5	54	0	59
Other comprehensive income (loss), net of taxes	0	0	(344)	(344)
Balances at Sep. 30, 2012	$ 8,680	$ 143,383	$ (1,665)	$ 150,398