Consolidated Statements of Changes in Stockholders' Equity (Unaudited) (USD $) In Thousands, except Share data	Total	Preferred Stock [Member]	Common Stock [Member]	Capital Surplus [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income, Net of Tax [Member]	Treasury Stock [Member]
Balance at beginning of period at Dec. 31, 2012		$ 27,662	$ 25,155	$ 164,949	$ 65,710	$ 6,607	$ (11,066)
Balance at beginning of period, shares at Dec. 31, 2012		28,000	25,154,818				(1,355,050)
Stock-based compensation				395
Net income	11,963				11,963
Other comprehensive income (loss)	(3,025)					(3,025)
Issuance of restricted shares			83	(83)
Repurchase of preferred stock		183
Purchase of treasury shares							(116)
Issuance of restricted shares, shares			83,400
Purchase of treasury shares, shares							(8,292)
Dividends on preferred shares					(700)
Cancellation of restricted shares			(1)	1
Accretion of fair value of warrant		183			(183)
Cancellation of restricted shares, shares			(1,000)
Proceeds from exercise of stock options			21	222
Proceeds from exercise of stock options, shares			20,451
Balance at end of period at Jun. 30, 2013	287,777	27,845	25,258	165,484	76,790	3,582	(11,182)
Balance at end of period, shares at Jun. 30, 2013		28,000	25,257,669				(1,363,342)
Balance at beginning of period at Dec. 31, 2013	316,699	28,000	26,462	189,722	83,991	(294)	(11,182)
Balance at beginning of period, shares at Dec. 31, 2013		28,000	26,461,769				(1,363,342)
Stock-based compensation				1,012
Net income	16,480				16,480
Other comprehensive income (loss)	4,417					4,417
Issuance of restricted shares			68	(68)
Repurchase of preferred stock		(28,000)
Purchase of treasury shares							(432)
Cash dividends declared, $0.05 per share					(1,338)
Issuance of restricted shares, shares			68,047
Repurchase of preferred stock, shares		(28,000)
Purchase of treasury shares, shares							(20,154)
Dividends on preferred shares					(286)
Issuance of common stock			1,599	32,875
Issuance of common stock,Shares			1,598,987
Proceeds from exercise of stock options			26	347
Proceeds from exercise of stock options, shares			26,514
Balance at end of period at Jun. 30, 2014	$ 343,399		$ 28,155	$ 223,888	$ 98,847	$ 4,123	$ (11,614)
Balance at end of period, shares at Jun. 30, 2014			28,155,317				(1,383,496)