ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Reclassified out of AOCI) (LOSS) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Amounts reclassified out of each component of accumulated other comprehensive income
Amortization of unrealized losses on investment securities transferred to HTM	$ 1,530	$ 1,552
Net income	20,725	17,760
SERP
Amounts reclassified out of each component of accumulated other comprehensive income
Net of tax	(1)	0
Amount Reclassified from AOCI
Amounts reclassified out of each component of accumulated other comprehensive income
Net income	1,144	1,143
Amount Reclassified from AOCI | Amortization of unrealized losses on investment securities transferred to HTM
Amounts reclassified out of each component of accumulated other comprehensive income
Amortization of unrealized losses on investment securities transferred to HTM	1,530	1,552
Tax effect	(387)	(409)
Amortization of unrealized losses on investment securities transferred to held-to-maturity	1,143	1,143
Amount Reclassified from AOCI | SERP
Amounts reclassified out of each component of accumulated other comprehensive income
Amortization	1	0
Reclassification from AOCI, tax	0	0
Net of tax	$ 1	$ 0