CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (USD $) In Thousands, unless otherwise specified	Total	Preferred Stock	Common Stock	Surplus	Retained Earnings (Deficit)	Accumulated Other Comprehensive Income	Treasury Stock	Unearned ESOP Shares
Balance at Dec. 31, 2009	$ 328,128	$ 99,460	$ 68	$ 510,198	$ (256,976)	$ 8,812	$ (32,183)	$ (1,251)
Increase (decrease) in shareholders' equity
Net income	23,230				23,230
Other comprehensive income	220					220
Issuance of 72,664 shares of Series C preferred stock and 318.6225 shares of preferred stock for the years 2011 and 2010, respectively	31,862	31,862
Issuance of 12,718,635 shares of common stock as a result of a registered direct offering, net of offering costs	52,454		13	52,441
Cash dividends common stock at $0.24, $0.16 and $0.16 per share for the years 2012, 2011 and 2010, respectively	(10,617)				(10,617)
Stock dividend equivalents restricted stock units at $0.24, $0.16 and $0.08 per share for the years 2012, 2011 and 2010, respectively	(15)				(15)
Employee stock ownership plan shares allocated	89			(328)				417
Stock based employee compensation	194			194
Preferred stock dividends and discount accretion	(5,040)	130		(130)	(5,040)
Balance at Dec. 31, 2010	420,505	131,452	81	562,375	(249,418)	9,032	(32,183)	(834)
Increase (decrease) in shareholders' equity
Net income	29,873				29,873
Other comprehensive income	4,092					4,092
Conversion of 318.6225 shares of Series B preferred stock to 7,497,000 shares of common stock		(31,862)	7	31,855
Repurchase of 100,000 shares of Series T preferred stock	(100,000)	(99,590)		(410)
Issuance of 72,664 shares of Series C preferred stock and 318.6225 shares of preferred stock for the years 2011 and 2010, respectively	72,664	72,664
Issuance of 23,640 and 3,879 shares of treasury stock for employee stock purchase plan for the years ended 2012 and 2011, respectively	18			(49)			67
Cash dividends common stock at $0.24, $0.16 and $0.16 per share for the years 2012, 2011 and 2010, respectively	(13,555)				(13,555)
Stock dividend equivalents restricted stock units at $0.24, $0.16 and $0.08 per share for the years 2012, 2011 and 2010, respectively	15			68	(53)
Employee stock ownership plan shares allocated	99			(318)				417
Stock based employee compensation	488			488
Preferred stock dividends and discount accretion	(4,932)				(4,932)
Balance at Dec. 31, 2011	409,267	72,664	88	594,009	(238,085)	13,124	(32,116)	(417)
Increase (decrease) in shareholders' equity
Net income	22,357				22,357
Other comprehensive income	418					418
Issuance of 23,640 and 3,879 shares of treasury stock for employee stock purchase plan for the years ended 2012 and 2011, respectively	109			(302)			411
Issuance of 6,804 shares of treasury stock for restricted stock unit vesting and related tax benefit	(13)			(131)			118
Cash dividends common stock at $0.24, $0.16 and $0.16 per share for the years 2012, 2011 and 2010, respectively	(20,794)				(20,794)
Stock dividend equivalents restricted stock units at $0.24, $0.16 and $0.08 per share for the years 2012, 2011 and 2010, respectively				166	(166)
Employee stock ownership plan shares allocated	95			(322)				417
Stock based employee compensation	991			991
Preferred stock dividends and discount accretion	(3,633)				(3,633)
Balance at Dec. 31, 2012	$ 408,797	$ 72,664	$ 88	$ 594,411	$ (240,321)	$ 13,542	$ (31,587)