Consolidated Statements of Changes in Shareholders' Equity (USD $) In Thousands	Preferred Stock [Member]	Common Stock [Member]	Warrant [Member]	Capital Surplus [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Treasury Stock [Member]	Total [Member]	Total
Balance at Dec. 31, 2009	$ 40,113	$ 22,227	$ 2,615	$ 178,734	$ 15,828	$ (12,399)	$ (85,168)	$ 161,950
Net changes during the year								60,792
Surrender of shares issued under stock incentive plan							(1,388)
Other comprehensive loss, net of tax						(488)			(488)
Net income					7,026				7,026
Cash dividends paid—common shares					(8,873)
Cash dividends paid—preferred shares					(2,100)
Common shares issued—public offering		8,625		56,256
Common shares issued under stock incentive plan and related tax benefits				1,190
Stock option and restricted stock compensation expense				257
Common shares issued under stock incentive plan		287
Discount accretion	489				(489)
Balance at Dec. 31, 2010	40,602	31,139	2,615	236,437	11,392	(12,887)	(86,556)	222,742
Net changes during the year								(1,921)
Surrender of shares issued under stock incentive plan							(24)
Other comprehensive loss, net of tax						(1,329)			(1,329)
Net income					17,596				17,596
Cash dividends paid—common shares					(11,122)
Cash dividends paid—preferred shares					(945)
Repurchase of warrants			(2,615)	1,670
Common shares issued—public offering		4,025		32,429
Restricted shares issued				(61)
Stock option and restricted stock compensation expense				394
Common shares issued under stock incentive plan		61
Redemption	(42,000)
Discount accretion	1,398				(1,398)
Balance at Dec. 31, 2011		35,225		270,869	15,523	(14,216)	(86,580)	220,821	220,821
Net changes during the year								7,269
Surrender of shares issued under stock incentive plan							(75)
Other comprehensive loss, net of tax						(2,275)			(2,275)
Net income					20,016				20,016
Cash dividends paid—common shares					(11,132)
Common shares issued for acquisition		39		336
Stock option and restricted stock compensation expense				360
Balance at Dec. 31, 2012		$ 35,264		$ 271,565	$ 24,407	$ (16,491)	$ (86,655)	$ 228,090	$ 228,090