CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Statement of Comprehensive Income [Abstract]
NET INCOME	$ 45,169	$ 27,879	$ 76,666	$ 51,147
Securities:
Net change in unrealized gain/(loss) on securities	28,422	(8,501)	58,387	(28,335)
Reclassification adjustment for net (gains)/losses realized in net income	(3,580)	259	(5,155)	(1,182)
Income taxes	(6,383)	2,117	(13,664)	7,508
Other comprehensive income/(loss) on securities	18,459	(6,125)	39,568	(22,009)
Derivatives used in cash flow hedging relationships:
Net change in unrealized gain/(loss) on derivatives	(2,263)	897	(3,768)	2,596
Reclassification adjustment for net losses on derivatives realized in net income	94	30	252	227
Income taxes	453	105	736	(603)
Other comprehensive income/(loss) on cash flow hedges	(1,716)	1,032	(2,780)	2,220
Other comprehensive income/(loss)	16,743	(5,093)	36,788	(19,789)
TOTAL COMPREHENSIVE INCOME	$ 61,912	$ 22,786	$ 113,454	$ 31,358