Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Statement of Comprehensive Income [Abstract]
NET INCOME	$ 14,582	$ 11,973	$ 45,451	$ 29,637
Securities:
Net change in unrealized gain (loss) on securities	2,202	(144)	10,916	30,538
Reclassification adjustment for net gains realized in net income	(1,807)	(825)	(9,270)	(2,460)
Net change in non-credit related other than temporary impairment	24	24	72	72
Income taxes	(169)	372	(667)	(11,110)
Other comprehensive income (loss) on securities	250	(573)	1,051	17,040
Derivatives used in cash flow hedging relationships:
Net change in unrealized gain (loss) on derivatives	(3,071)	317	(3,016)	(758)
Reclassification adjustment for net loss on derivatives realized in net income	557	577	1,680	1,671
Income taxes	936	(334)	488	(341)
Other comprehensive income (loss) on cash flow hedges	(1,578)	560	(848)	572
Other comprehensive income (loss)	(1,328)	(13)	203	17,612
TOTAL COMPREHENSIVE INCOME	$ 13,254	$ 11,960	$ 45,654	$ 47,249