Earnings Per Common Share (EPS) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Earnings Per Share, Basic and Diluted [Abstract]
Net Income. Basic EPS	$ 7,226	$ 4,563	$ 19,069	$ 18,074
Shares, Basic EPS	42,202	41,909	42,087	38,123
Per Share Amount, Basic EPS	$ 0.17	$ 0.11	$ 0.45	$ 0.47
Shares, Effect of dilutive stock options and warrants	490	593	449	709
Net Income, Diluted EPS	$ 7,226	$ 4,563	$ 19,069	$ 18,074
Shares, Diluted EPS	42,692	42,502	42,536	38,832
Per Share Amount, Diluted EPS	$ 0.17	$ 0.11	$ 0.45	$ 0.47
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	1,542	695	1,608	770