CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Preferred Stock [Member]	Common Stock [Member]	Capital Surplus [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income, Net of Tax [Member]	Accumulated Other Comprehensive Income, Net of Tax [Member] Interest Rate Swap [Member]	Accumulated Other Comprehensive Income, Net of Tax [Member] Available-for-sale Securities [Member]	Treasury Stock [Member]
Balance at beginning of period at Dec. 31, 2012		$ 27,662	$ 25,155	$ 164,949	$ 65,710		$ (23)	$ 6,630	$ (11,066)
Balance at beginning of period, shares at Dec. 31, 2012		28,000	25,154,818						1,355,050
Repurchase of preferred stock		$ 0
Accretion of fair value of warrant		338			(338)
Issuance of common stock			$ 1,169	23,460
Issuance of common stock, Shares			1,168,918
Issuance of restricted shares			$ 108	(108)
Issuance of restricted shares,shares			108,400
Exercise of stock options			$ 34	376
Exercise of stock options, shares			33,633
Stock-based compensation				1,041
Stock-based compensation net tax benefit				0
Forfeitures of restricted shares			$ (4)	4
Forfeitures of restricted shares, shares			(4,000)
Dividends on preferred shares					(1,399)
Dividends on common shares					0
Purchase of treasury shares									$ (116)
Purchase of treasury shares,shares									8,292
Net income	$ 20,018				20,018
Change during period	(6,901)						1,420	(8,321)
Balance at end of period at Dec. 31, 2013	316,699	$ 28,000	$ 26,462	189,722	83,991	$ (294)	1,397	(1,691)	$ (11,182)
Balance at end of period, shares at Dec. 31, 2013		28,000	26,461,769						1,363,342
Repurchase of preferred stock		$ (28,000)
Repurchase of preferred stock, Shares		(28,000)
Accretion of fair value of warrant		$ 0			0
Issuance of common stock			$ 1,599	32,875
Issuance of common stock, Shares			1,598,998
Issuance of restricted shares			$ 77	(77)
Issuance of restricted shares,shares			77,047
Exercise of stock options			$ 32	427
Exercise of stock options, shares			31,784
Stock-based compensation				2,057
Stock-based compensation net tax benefit				0
Forfeitures of restricted shares			$ (11)	11
Forfeitures of restricted shares, shares			(10,571)
Dividends on preferred shares					(286)
Dividends on common shares					(4,016)
Purchase of treasury shares									$ (474)
Purchase of treasury shares,shares									21,822
Net income	38,723				38,723
Change during period	6,392						(889)	7,281
Balance at end of period at Dec. 31, 2014	366,028	$ 0	$ 28,159	225,015	118,412	6,098	508	5,590	$ (11,656)
Balance at end of period, shares at Dec. 31, 2014		0	28,159,027						1,385,164
Repurchase of preferred stock		$ 0
Accretion of fair value of warrant		0			0
Issuance of common stock			$ 5,320	109,569
Issuance of common stock, Shares			5,320,000
Issuance of restricted shares			$ 71	(71)
Issuance of restricted shares,shares			71,000
Exercise of stock options			$ 75	1,116
Exercise of stock options, shares			75,135
Stock-based compensation				1,485
Stock-based compensation net tax benefit				235
Forfeitures of restricted shares			$ 0	0
Dividends on preferred shares					0
Dividends on common shares					(6,439)
Purchase of treasury shares									$ (732)
Purchase of treasury shares,shares									28,613
Net income	40,847				40,847
Change during period	(2,745)						(356)	(2,389)
Balance at end of period at Dec. 31, 2015	$ 514,759	$ 0	$ 33,625	$ 337,349	$ 152,820	$ 3,353	$ 152	$ 3,201	$ (12,388)
Balance at end of period, shares at Dec. 31, 2015			33,625,162						1,413,777