Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Net Income	$ 32,081	$ 14,013	$ 55,351	$ 29,901
Other comprehensive (loss) income, before tax benefit (expense):
Unrealized holding gains (losses) on securities arising during the period	660	1,702	(3,322)	4,245
Less: reclassification adjustment for gains on securities included in net income	(5,262)	49	(8,102)	(603)
Unrealized holding gains (losses) on derivatives arising during the period	97	(66)	(33)	(582)
Less: reclassification adjustment for losses (gains) on derivatives included in net income	10	(5)	10	73
Total other comprehensive (loss) income, before tax benefit (expense)	(4,495)	1,680	(11,447)	3,133
Income tax benefit (expense) related to items of other comprehensive (loss) income	943	(588)	2,403	(1,097)
Total other comprehensive (loss) income	(3,552)	1,092	(9,044)	2,036
Comprehensive Income	$ 28,529	$ 15,105	$ 46,307	$ 31,937