Consolidated Statements of Changes in Stockholders' Equity (Unaudited) (USD $) In Thousands	Common Stock [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Total
Balance at Dec. 31, 2012	$ 8,685	$ 144,162	$ (2,738)	$ 150,109
Net income		13,168		13,168
Dividends		(3,752)		(3,752)
Other comprehensive income (loss), net of tax			(13,231)	(13,231)
Balance at Sep. 30, 2013	8,685	153,578	(15,969)	146,294
Balance at Dec. 31, 2013	8,685	154,171	(16,964)	145,892
Net income		12,776		12,776
Dividends		(3,821)		(3,821)
Exercise of stock options	3	55		58
Other comprehensive income (loss), net of tax			7,917	7,917
Balance at Sep. 30, 2014	$ 8,688	$ 163,181	$ (9,047)	$ 162,822