Net Income Per Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Earnings Per Share [Abstract]
Basic net income per share:	$ 15,160	$ 10,815	$ 28,780	$ 22,680
Less: Preferred Stock dividends and discount accretion		(852)		(1,709)
NET INCOME AVAILABLE TO COMMON STOCKHOLDERS	15,160	9,963	28,780	20,971
Net income available to common stockholders (in shares)	36,026,763	28,783,407	35,991,794	28,750,197
Effect of dilutive stock options and warrants (in shares)	267,386	240,106	285,754	246,577
Net income available to common stockholders (in dollars per share)	$ 0.42	$ 0.35	$ 0.80	$ 0.73
Diluted net income per share:
Net income available to common stockholders	$ 15,160	$ 9,963	$ 28,780	$ 20,971
Net income available to common stockholders (in shares)	36,294,149	29,023,513	36,277,548	28,996,774
Net income available to common stockholders (in dollars per share)	$ 0.41	$ 0.34	$ 0.79	$ 0.72