ACCUMULATED OTHER COMPREHENSIVE INCOME (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	$ 3,566,614	$ 3,284,630	$ 3,426,747	$ 3,197,400
Unrealized (loss) gain on debt securities available-for-sale, net of tax	22,296	(10,200)	20,215	(14,311)
Balance at end of period	3,681,368	3,347,069	3,681,368	3,347,069
Accumulated Other Comprehensive Income (Loss)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	(38,020)	(50,618)	(35,939)	(46,507)
Balance at end of period	$ (15,724)	$ (60,818)	$ (15,724)	$ (60,818)