Consolidated Statements of Stockholders' Equity (USD $) In Thousands	Total	Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss)[Member]
Balance at Dec. 31, 2009	$ 133,059	$ 34,024	$ 3,000	$ 34,387	$ 65,959	$ (4,311)
Stockholders' Equity [Roll Forward]
Net income	9,883	0	0	0	9,883	0
Other comprehensive income	3,589	0	0	0	0	3,589
Preferred stock discount accretion	0	363	0	0	(363)	0
Preferred stock dividends declared	(1,350)	0	0	0	(1,350)	0
Balance at Sep. 30, 2010	145,181	34,387	3,000	34,387	74,129	(722)
Balance at Dec. 31, 2010	145,436	34,508	3,000	34,387	76,188	(2,647)
Stockholders' Equity [Roll Forward]
Net income	11,536	0	0	0	11,536	0
Other comprehensive income	3,499	0	0	0	0	3,499
Preferred stock discount accretion	0	1,492	0	0	(1,492)	0
Redemption of preferred stock	(36,000)	(36,000)	0	0	0	0
Repurchase of common stock warrant	(700)	0	0	(700)	0	0
Cash dividends declared, $0.10 per common share	(1,740)	0	0	0	(1,740)	0
Preferred stock dividends declared	(895)	0	0	0	(895)	0
Balance at Sep. 30, 2011	$ 121,136	$ 0	$ 3,000	$ 33,687	$ 83,597	$ 852