Earnings Per Common Share (Schedule of Basic and Diluted Earnings Per Share) (Details) (USD $) In Thousands, except Per Share data	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Earnings Per Common Share
Net income	$ 8,632	$ 5,056	$ 14,411	$ 12,972
Less: Preferred dividends and accretion of issuance discount for preferred stock	0	(1,110)	0	(2,217)
Net income applicable to common shareholders	8,632	3,946	14,411	10,755
Less: Earnings allocated to participating securities	(82)	(38)	(135)	(109)
Earnings allocated to common shareholders, Basic	8,550	3,908	14,276	10,646
Weighted average common shares outstanding	39,107	34,829	39,073	31,376
Basic earnings per common share	$ 0.22	$ 0.11	$ 0.37	$ 0.34
Earnings allocated to common shareholders, Diluted	8,550	3,908	14,276	10,646
Weighted average common shares outstanding	39,107	34,829	39,073	31,376
Dilutive effect of equity awards and warrants	$ 59	$ 248	$ 86	$ 231
Weighted average diluted common shares outstanding	39,166	35,077	39,159	31,607
Diluted earnings per common share	$ 0.22	$ 0.11	$ 0.36	$ 0.34
Potentially dilutive share options that were not included in the computation of diluted EPS because to do so would be anti-dilutive.	62	54	54	54