Consolidated Statements of Changes in Stockholders' Equity (USD $) In Thousands, unless otherwise specified	Preferred Stock [Member]	Common Stock [Member]	Additional Paid In Capital [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Total
Balance at Dec. 31, 2008	$ 0	$ 86,908	$ 5,204	$ 16,309	$ (17,796)	$ (8,912)	$ 81,713
Comprehensive income:
Net income				3,771			3,771
Other comprehensive income (loss), net of taxes						(1,864)	(1,864)
Total comprehensive income							1,907
Issuance of preferred stock and warrants	9,539		461				10,000
Accretion of discount on preferred stock	80			(80)			0
Dividends on preferred stock				(487)			(487)
Proceeds from rights offering		11,000					11,000
Cash dividends declared on common stock				(2,434)			(2,434)
Issuance cost of common stock				(11)			(11)
Exercise of stock options			(19)		76		57
Stock-based compensation expense			77				77
Taxes related to stock-based compensation			(73)				(73)
Balance at Dec. 31, 2009	9,619	97,908	5,650	17,068	(17,720)	(10,776)	101,749
Comprehensive income:
Net income				7,004			7,004
Other comprehensive income (loss), net of taxes						3,101	3,101
Total comprehensive income							10,105
Accretion of discount on preferred stock	81			(81)			0
Dividends on preferred stock				(500)			(500)
Proceeds from stock offerings		12,148	(770)				11,378
Cash dividends declared on common stock				(1,852)			(1,852)
Issuance cost of common stock				(6)			(6)
Stock awarded			3		22		25
Stock-based compensation expense			51				51
Option related tax trueup			7				7
Balance at Dec. 31, 2010	9,700	110,056	4,941	21,633	(17,698)	(7,675)	120,957
Comprehensive income:
Net income				13,926			13,926
Other comprehensive income (loss), net of taxes						2,229	2,229
Total comprehensive income							16,155
Accretion of discount on preferred stock	300			(300)			0
Dividends on preferred stock				(520)			(520)
Redemption of series A preferred stock	(10,000)						(10,000)
Proceeds from issuance of series B perferred stock	11,250						11,250
Warrant repurchased			(245)				(245)
Cash dividends declared on common stock				(1,955)			(1,955)
Issuance cost of common stock				(5)			(5)
Issuance cost of series B preferred stock				(84)			(84)
Exercise of stock options			(16)		344		328
Stock-based compensation expense			35				35
Balance at Dec. 31, 2011	$ 11,250	$ 110,056	$ 4,715	$ 32,695	$ (17,354)	$ (5,446)	$ 135,916