Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Statement of Comprehensive Income [Abstract]
NET INCOME	$ 20,208	$ 14,582	$ 61,187	$ 45,451
Securities:
Net change in unrealized gain (loss) on securities	(5,696)	2,202	18,274	10,916
Reclassification adjustment for net gains realized in net income	(1,586)	(1,807)	(9,964)	(9,270)
Net change in non-credit related other than temporary impairment	0	24	7	72
Income taxes	2,871	(169)	(3,364)	(667)
Other comprehensive income (loss) on securities	(4,411)	250	4,953	1,051
Derivatives used in cash flow hedging relationships:
Net change in unrealized gain (loss) on derivatives	844	(3,071)	(4,623)	(3,016)
Reclassification adjustment for net losses on derivatives realized in net income	492	557	1,463	1,680
Income taxes	(517)	936	1,155	488
Other comprehensive income (loss) on cash flow hedges	819	(1,578)	(2,005)	(848)
Other comprehensive income (loss)	(3,592)	(1,328)	2,948	203
TOTAL COMPREHENSIVE INCOME	$ 16,616	$ 13,254	$ 64,135	$ 45,654