CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Statement of Comprehensive Income [Abstract]
NET INCOME	$ 30,131	$ 45,169	$ 50,171	$ 76,666
Securities:
Net change in unrealized gain on securities	81,552	28,422	53,224	58,387
Reclassification adjustment for net gains realized in net income	(2,006)	(3,580)	(3,664)	(5,155)
Income taxes	(20,729)	(6,383)	(12,932)	(13,664)
Other comprehensive income on securities	58,817	18,459	36,628	39,568
Derivatives used in cash flow hedging relationships:
Net change in unrealized gain/(loss) on derivatives	317	(2,263)	(3,363)	(3,768)
Reclassification adjustment for net gains/(losses) on derivatives realized in net income	(423)	94	(613)	252
Income taxes	18	453	832	736
Other comprehensive loss on cash flow hedges	(88)	(1,716)	(3,144)	(2,780)
Other comprehensive income	58,729	16,743	33,484	36,788
TOTAL COMPREHENSIVE INCOME	$ 88,860	$ 61,912	$ 83,655	$ 113,454