Condensed Consolidated Statement of Shareholders' Equity (USD $) In Thousands, unless otherwise specified	Total	Preferred Stock [Member]	Common Stock [Member]	Treasury Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Beginning Balance at Dec. 31, 2008	$ 214,572	$ 31,116	$ 129	$ (1,743)	$ 115,112	$ 68,710	$ 1,248
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (loss)	(47,955)	0	0	0	0	(47,955)	0
Change in fair value of available for sale securities, net of tax	455	0	0	0	0	0	455
Reclassification adjustment for realized gain on sale of securities included in net income, net of tax	(611)	0	0	0	0	0	(611)
Reclassification of cash flow hedge, net of tax	(159)	0	0	0	0	0	(159)
Total comprehensive income (loss)	(48,270)
Cash dividends paid on common shares, $0.21 per share	(2,694)	0	0	0	0	(2,694)	0
Cash dividends paid on preferred stock	(1,585)	0	0	0	0	(1,585)	0
Preferred stock accretion of discount	0	686	0	0	0	(686)	0
Preferred stock issuance cost	(130)	0	0	0	(130)	0	0
Issuance under equity compensation plans, net	323	0	1	0	322	0	0
Share-based compensation	2,034	0	0	0	2,034	0	0
Excess tax expense related to equity compensation plans	(338)	0	0	0	(338)	0	0
Ending Balance at Dec. 31, 2009	163,912	31,802	130	(1,743)	117,000	15,790	933
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (loss)	5,573	0	0	0	0	5,573	0
Change in fair value of available for sale securities, net of tax	(79)	0	0	0	0	0	(79)
Reclassification adjustment for realized gain on sale of securities included in net income, net of tax	(1,272)	0	0	0	0	0	(1,272)
Reclassification of cash flow hedge, net of tax	(155)	0	0	0	0	0	(155)
Total comprehensive income (loss)	4,067
Cash dividends paid on common shares, $0.21 per share	(3,121)	0	0	0	0	(3,121)	0
Cash dividends paid on preferred stock	(1,750)	0	0	0	0	(1,750)	0
Preferred stock accretion of discount	0	717	0	0	0	(717)	0
Issuance under equity compensation plans, net	357	0	0	0	357	0	0
Issuance under stock offering	14,883	0	20	0	14,863	0	0
Share-based compensation	1,947	0	0	0	1,947	0	0
Excess tax expense related to equity compensation plans	(494)	0	0	0	(494)	0	0
Ending Balance at Dec. 31, 2010	179,801	32,519	150	(1,743)	133,673	15,775	(573)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (loss)	25,423	0	0	0	0	25,423	0
Change in fair value of available for sale securities, net of tax	5,207	0	0	0	0	0	5,207
Reclassification adjustment for realized gain on sale of securities included in net income, net of tax	(928)	0	0	0	0	0	(928)
Reclassification of cash flow hedge, net of tax	(104)	0	0	0	0	0	(104)
Total comprehensive income (loss)	29,598
Cash dividends paid on common shares, $0.21 per share	(3,577)	0	0	0	0	(3,577)	0
Cash dividends paid on preferred stock	(1,750)	0	0	0	0	(1,750)	0
Preferred stock accretion of discount	0	774	0	0	0	(774)	0
Issuance under equity compensation plans, net	1,468	0	1	0	1,467	0	0
Issuance under stock offering	32,612	0	27	0	32,585	0	0
Share-based compensation	1,466	0	0	0	1,466	0	0
Excess tax expense related to equity compensation plans	(53)	0	0	0	(53)	0	0
Ending Balance at Dec. 31, 2011	$ 239,565	$ 33,293	$ 178	$ (1,743)	$ 169,138	$ 35,097	$ 3,602