Net Income Per Share (Details) (USD $) In Thousands, except 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]
Basic net income per share:	$ 16,122	$ 10,403	$ 44,902	$ 33,083
Less: Preferred Stock dividends and discount accretion		(430)		(2,139)
NET INCOME AVAILABLE TO COMMON STOCKHOLDERS	16,122	9,973	44,902	30,944
Net income available to common stockholders (in shares)	36,054,867	28,806,809	36,013,049	28,769,206
Effect of dilutive stock options and warrants (in shares)	274,114	274,663	282,337	257,260
Net income available to common stockholders (in dollars per share)	$ 0.45	$ 0.35	$ 1.25	$ 1.08
Diluted net income per share:
Net income available to common stockholders	$ 16,122	$ 9,973	$ 44,902	$ 30,944
Net income available to common stockholders (in shares)	36,328,981	29,081,472	36,295,386	29,026,466
Net income available to common stockholders (in dollars per share)	$ 0.45	$ 0.35	$ 1.24	$ 1.07