Consolidated Statements of Changes in Shareholders’ Equity (USD $) In Thousands	Common Stock [Member]	Preferred Stock [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Total
Balances at Dec. 31, 2011	$ 115,734	$ 32,792	$ 3,955	$ 2,896	$ 155,377
Net income			10,534		10,534
Cash dividends on common stock			(2,314)		(2,314)
Accrued dividends on preferred stock and		22	(1,269)		(1,247)
Redemption of 16,000 shares of preferred stock	850	(15,906)			(15,056)
Amortization of stock warrants	(15)		15		0
Repurchase of stock warrants	(1,947)				(1,947)
Issuance of shares of common stock through the dividend reinvestment plan	440				440
Issuance of shares of common stock from supplemental shareholder investments	201				201
Issuance of shares of common stock	262				262
Stock option and restricted stock expense	96				96
Net change in unrealized gain/(loss) on securities available for sale, net of tax				712	712
Balances at Dec. 31, 2012	115,621	16,908	10,921	3,608	147,058
Net income			2,863		2,863
Cash dividends on common stock			(486)		(486)
Accrued dividends on preferred stock and		4	(213)		(209)
Issuance of shares of common stock through the dividend reinvestment plan	88				88
Issuance of shares of common stock from supplemental shareholder investments	53				53
Issuance of shares of common stock	75				75
Stock option and restricted stock expense	24				24
Net change in unrealized gain/(loss) on securities available for sale, net of tax				(99)	(99)
Balances at Mar. 31, 2013	$ 115,861	$ 16,912	$ 13,085	$ 3,509	$ 149,367