Consolidated Statements of Changes in Stockholders' Equity (USD $) In Thousands	Series A Preferred Stock [Member] Retained Earnings [Member]	Series A Preferred Stock [Member]	Series B Preferred Stock [Member] Retained Earnings [Member]	Series B Preferred Stock [Member]	Preferred Stock [Member]	Common Stock [Member]	Additional Paid In Capital [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Loss [Member]	Total
Balance at Dec. 31, 2010					$ 9,700	$ 110,056	$ 4,941	$ 21,633	$ (17,698)	$ (7,675)	$ 120,957
Net income								3,018			3,018
Other comprehensive income, net of tax and reclassification adjustment										1,209	1,209
Accretion of discount on preferred stock					21			(21)
Issuance cost of common stock								(1)			(1)
Cash dividend on preferred stock	(125)	(125)
Cash dividends declared on common stock								(489)			(489)
Stock issued for options exercise									7		7
Stock-based compensation expense							8				8
Balance at Mar. 31, 2011					9,721	110,056	4,949	24,015	(17,691)	(6,466)	124,584
Balance at Dec. 31, 2011					11,250	110,056	4,715	32,695	(17,354)	(5,446)	135,916
Net income								4,231			4,231
Other comprehensive income, net of tax and reclassification adjustment										2,560	2,560
Issuance cost of common stock								(2)			(2)
Cash dividend on preferred stock			(141)	(141)
Cash dividends declared on common stock								(490)			(490)
Stock-based compensation expense							7				7
Balance at Mar. 31, 2012					$ 11,250	$ 110,056	$ 4,722	$ 36,293	$ (17,354)	$ (2,886)	$ 142,081