Condensed Consolidated Statements of Changes in Shareholders' Equity (USD $)	Total	Preferred Stock [Member]	Common Stock [Member]	Common Stock Warrant [Member]	Retained Earnings (Deficit) [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Opening Balances at Dec. 31, 2011	$ 164,999,000	$ 20,331,000	$ 172,841,000	$ 1,138,000	$ (32,639,000)	$ 3,328,000
Repurchase of preferred stock	(21,000,000)	(21,000,000)
Preferred stock dividends	(362,000)				(362,000)
Accretion of preferred stock	0	669,000			(669,000)
Repurchase of common stock warrant	(7,465,000)		(6,327,000)	(1,138,000)
Employee stock purchase plan (1,098 shares, 1,743 shares in 2013 and 2012 respectively)	29,000		29,000
Stock option exercises (2,950 shares, 47,007 shares in 2013 and 2012 respectively)	488,000		488,000
Stock tendered for stock option exercises (2,419 shares, 18,718 shares in 2013 and 2012 respectively)	(317,000)		(317,000)
Stock-based compensation expense	14,000		14,000
Net income	9,487,000				9,487,000
Change in net unrealized holding gain on securities available for sale, net of tax effect	(596,000)					(596,000)
Change in fair value of interest rate swap, net of tax effect	(719,000)					(719,000)
Ending Balances at Sep. 30, 2012	144,558,000	0	166,728,000	0	(24,183,000)	2,013,000
Opening Balances at Dec. 31, 2012	146,590,000	0	166,074,000		(21,134,000)	1,650,000
Employee stock purchase plan (1,098 shares, 1,743 shares in 2013 and 2012 respectively)	19,000		19,000
Dividend reinvestment plan (1,954 shares)	33,000		33,000
Stock option exercises (2,950 shares, 47,007 shares in 2013 and 2012 respectively)	52,000		52,000
Stock tendered for stock option exercises (2,419 shares, 18,718 shares in 2013 and 2012 respectively)	(52,000)		(52,000)
Stock-based compensation expense	354,000		354,000
Cash dividends ($0.33 per common share)	(2,851,000)		(2,851,000)
Net income	11,870,000				11,870,000
Change in net unrealized holding gain on securities available for sale, net of tax effect	(6,648,000)					(6,648,000)
Change in fair value of interest rate swap, net of tax effect	467,000					467,000
Ending Balances at Sep. 30, 2013	$ 149,834,000	$ 0	$ 163,629,000		$ (9,264,000)	$ (4,531,000)