Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Statement of Comprehensive Income [Abstract]
Net Income	$ 35,715	$ 27,017
Other comprehensive income, net of tax:
Unrealized (loss) gain on securities available for sale	(5,123)	712
Reclassification adjustment for net gains included in net income	(31)	(322)
Total unrealized loss on investment securities	(5,154)	390
Unrealized gain on derivatives	2,233	1,079
Reclassification adjustment for amounts included in net income	(65)	(369)
Total unrealized gain on derivatives	2,168	710
Other comprehensive (loss) income	(2,986)	1,100
Comprehensive Income	$ 32,729	$ 28,117