CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Statement of Comprehensive Income [Abstract]
NET INCOME	$ 55,924	$ 47,958	$ 170,343	$ 98,129
Securities:
Net change in unrealized gain/(loss) on securities	(44,968)	31,340	(65,613)	84,564
Reclassification adjustment for net gains realized in net income	(1,535)	(1,099)	(4,347)	(4,763)
Income tax (expense)/benefit	12,181	(7,845)	18,264	(20,777)
Other comprehensive gain/(loss) on securities	(34,322)	22,396	(51,696)	59,024
Derivatives used in cash flow hedging relationships:
Net change in unrealized gain/(loss) on derivatives	2,220	1,199	4,853	(2,164)
Reclassification adjustment for net gains on derivatives realized in net income	(543)	(601)	(1,601)	(1,214)
Income tax (expense)/benefit	(392)	(126)	(725)	706
Other comprehensive income (loss) on cash flow hedges	1,285	472	2,527	(2,672)
Other comprehensive income (loss)	(33,037)	22,868	(49,169)	56,352
TOTAL COMPREHENSIVE INCOME	$ 22,887	$ 70,826	$ 121,174	$ 154,481