Earnings Per Share - Basic and Diluted Earnings per Share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Earnings Per Share [Abstract]
Net income - Basic and Diluted	$ 14,272	$ 8,968	$ 37,330	$ 25,173
Weighted average common shares outstanding - Basic	54,789	52,742	54,464	50,819
Assumed conversions:
Incremental common shares from warrants	0	1,365	162	1,404
Incremental common shares from stock options	867	1,134	901	1,143
Incremental common shares from restricted stock units	34	76	9	41
Weighted average common shares outstanding - Diluted	55,690	55,317	55,536	53,407
Basic earnings per common share	$ 0.26	$ 0.17	$ 0.69	$ 0.50
Diluted earnings per common share	$ 0.26	$ 0.16	$ 0.67	$ 0.47