CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement of Comprehensive Income [Abstract]
NET INCOME	$ 47,958	$ 34,612	$ 98,129	$ 111,278
Securities:
Net change in unrealized gain on securities	31,340	19,851	84,564	78,238
Reclassification adjustment for net gains realized in net income	(1,099)	(2,013)	(4,763)	(7,168)
Income taxes	(7,845)	(4,577)	(20,777)	(18,241)
Other comprehensive income on securities	22,396	13,261	59,024	52,829
Derivatives used in cash flow hedging relationships:
Net change in unrealized gain/(loss) on derivatives	1,199	(800)	(2,164)	(4,568)
Reclassification adjustment for net gains/(losses) on derivatives realized in net income	(601)	27	(1,214)	279
Income taxes	(126)	161	706	897
Other comprehensive income (loss) on cash flow hedges	472	(612)	(2,672)	(3,392)
Other comprehensive income	22,868	12,649	56,352	49,437
TOTAL COMPREHENSIVE INCOME	$ 70,826	$ 47,261	$ 154,481	$ 160,715