ACCUMULATED OTHER COMPREHENSIVE INCOME (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	$ 3,284,630	$ 3,073,376	$ 3,197,400	$ 2,966,451
Unrealized loss on debt securities available-for-sales, net of tax	(10,200)	(38,099)	(14,311)	(66,324)
Balance at end of period	3,347,069	3,119,070	3,347,069	3,119,070
Accumulated Other Comprehensive Income (Loss)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	(50,618)	(12,635)	(46,507)	15,590
Balance at end of period	$ (60,818)	$ (50,734)	$ (60,818)	$ (50,734)