Consolidated Statements of Changes in Stockholders' Equity (USD $) In Thousands	Total	Restricted Stock [Member]	Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Balance at Dec. 31, 2011	$ 135,916		$ 11,250	$ 110,056	$ 4,715	$ 32,695	$ (17,354)	$ (5,446)
Net income	8,584					8,584
Other comprehensive income, net of tax	4,952							4,952
Dividend on series B preferred stock	(225)					(225)
Issuance cost of common stock	(3)					(3)
Cash dividends declared on common stock	(1,388)					(1,388)
Stock issued for options exercise	132				12		120
Stock-based compensation expense	15				15
Balance at Jun. 30, 2012	147,983		11,250	110,056	4,742	39,663	(17,234)	(494)
Balance at Dec. 31, 2012	160,691		11,250	110,056	4,801	46,753	(17,232)	5,063
Net income	9,847					9,847
Other comprehensive income, net of tax	(7,287)							(7,287)
Dividend on series B preferred stock	(113)					(113)
Issuance cost of common stock	(6)					(6)
Cash dividends declared on common stock	(2,125)					(2,125)
Issuance of restricted stock awards (18,829 shares)		243			91		152
Stock issued for options exercise	10				8		2
Stock-based compensation expense	25				25
Balance at Jun. 30, 2013	$ 161,285		$ 11,250	$ 110,056	$ 4,925	$ 54,356	$ (17,078)	$ (2,224)