ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	$ 3,917,678	$ 3,566,614	$ 3,751,522	$ 3,426,747
Reclassification for gains included in net income, net of tax	(88)		(88)
Unrealized gain on debt securities available-for-sale, net of tax	12,145	22,296	35,378	20,215
Balance at end of period	4,016,701	3,681,368	4,016,701	3,681,368
Accumulated Other Comprehensive Income (Loss)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	(6,886)	(38,020)	(30,119)	(35,939)
Balance at end of period	$ 5,171	$ (15,724)	$ 5,171	$ (15,724)