Consolidated Statements of Changes in Stockholders' Equity (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, 2011		$ 50,727	$ 25,087	$ 166,639	$ 54,852	$ 7,296	$ (10,831)
Balance at beginning of period, Shares at Dec. 31, 2011		52,000	25,087,468
Repurchase of warrants				(2,670)
Net income	9,763				9,763
Other comprehensive income (loss)	41					41
Issuance of restricted shares			67	(67)
Stock-based compensation				278
Dividends on preferred shares					(1,979)
Issuance of restricted shares, Shares			67,450
Accretion of fair value of warrant		480			(480)
Accretion of fair value of warrant, Shares
Proceeds from exercise of stock options			1	2
Proceeds from exercise of stock options, Shares			400
Balance at end of period at Sep. 30, 2012	299,206	51,207	25,155	164,182	62,156	7,337	(10,831)
Balance at end of period, Shares at Sep. 30, 2012		52,000	25,155,318
Balance at beginning of period at Dec. 31, 2012	279,017	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
Net income	18,640				18,640
Other comprehensive income (loss)	(7,138)					(7,138)
Purchase of treasury shares							(116)
Issuance of restricted shares			83	(83)
Stock-based compensation				592
Dividends on preferred shares					(275)
Issuance of restricted shares, Shares			83,400
Cancellation of restricted shares			(1)	1
Accretion of fair value of warrant		276			(1,050)
Cancellation of restricted shares, Shares			(1,000)
Accretion of fair value of warrant, Shares
Proceeds from exercise of stock options			34	376
Proceeds from exercise of stock options, Shares			33,633
Balance at end of period at Sep. 30, 2013	$ 290,356	$ 27,938	$ 25,271	$ 165,835	$ 83,025	$ (531)	$ (11,182)
Balance at end of period, Shares at Sep. 30, 2013		28,000	25,270,851