Condensed Consolidated Statement of Shareholders' Equity Statement (USD $) In Thousands	Total	Preferred Stock [Member]	Common Stock [Member]	Treasury Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Shareholders' Equity Attributable to Parent Beginning 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) Attributable to Parent	(2,277)	0	0	0	0	(2,277)	0
Change in fair value of available for sale securities, net of tax	2,515	0	0	0	0	0	2,515
Reclassification adjustment for realized gain on sale of securities included in net income, net of tax	(693)	0	0	0	0	0	(693)
Reclassification of cash flow hedge, net of tax	(79)	0	0	0	0	0	(79)
Total comprehensive income (loss)	(534)
Cash dividends paid on common shares, $0.105 per share	(1,561)	0	0	0	0	(1,561)	0
Cash dividends paid on preferred stock	(875)	0	0	0	0	(875)	0
Preferred stock accretion of discount	0	352	0	0	0	(352)	0
Issuance under equity compensation plans, net	365	0	0	0	365	0	0
Issuance under stock offering	14,882	0	19	0	14,863	0	0
Share-based compensation	943	0	0	0	943	0	0
Excess tax expense (benefit) related to equity compensation plans	(260)	0	0	0	(260)	0	0
Shareholders' Equity Attributable to Parent Ending Balance at Jun. 30, 2010	176,872	32,154	149	(1,743)	132,911	10,725	2,676
Shareholders' Equity Attributable to Parent Beginning Balance at Dec. 31, 2010	183,348	32,519	150	(1,743)	133,673	19,322	(573)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (Loss) Attributable to Parent	16,961	0	0	0	0	16,961	0
Change in fair value of available for sale securities, net of tax	5,058	0	0	0	0	0	5,058
Reclassification adjustment for realized gain on sale of securities included in net income, net of tax	(435)	0	0	0	0	0	(435)
Reclassification of cash flow hedge, net of tax	(56)	0	0	0	0	0	(56)
Total comprehensive income (loss)	21,528
Cash dividends paid on common shares, $0.105 per share	(1,712)	0	0	0	0	(1,712)	0
Cash dividends paid on preferred stock	(875)	0	0	0	0	(875)	0
Preferred stock accretion of discount	0	381	0	0	0	(381)	0
Issuance under equity compensation plans, net	1,313	0	1	0	1,312	0	0
Issuance under stock offering	32,620		27	0	32,593	0	0
Share-based compensation	748	0	0	0	748	0	0
Excess tax expense (benefit) related to equity compensation plans	14	0	0	0	14	0	0
Shareholders' Equity Attributable to Parent Ending Balance at Jun. 30, 2011	$ 236,984	$ 32,900	$ 178	$ (1,743)	$ 168,340	$ 33,315	$ 3,994