INVESTMENT SECURITIES - Held to maturity securities (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
HELD-TO-MATURITY SECURITIES:
Amortized Cost	$ 191,385	$ 195,088
Fair Value Adjustment	(161)	(65)
Amortized Carrying Value	191,224	195,023
Gross Unrealized Losses	26,059	23,830
Fair Value	165,165	171,193
Agency mortgage-backed securities
HELD-TO-MATURITY SECURITIES:
Amortized Cost	71,676	72,495
Fair Value Adjustment	2,147	2,436
Amortized Carrying Value	73,823	74,931
Gross Unrealized Losses	9,310	8,686
Fair Value	64,513	66,245
Agency collateralized mortgage obligations
HELD-TO-MATURITY SECURITIES:
Amortized Cost	113,547	116,405
Fair Value Adjustment	(2,316)	(2,502)
Amortized Carrying Value	111,231	113,903
Gross Unrealized Losses	16,081	14,662
Fair Value	95,150	99,241
States and political subdivisions
HELD-TO-MATURITY SECURITIES:
Amortized Cost	6,162	6,188
Fair Value Adjustment	8	1
Amortized Carrying Value	6,170	6,189
Gross Unrealized Losses	668	482
Fair Value	$ 5,502	$ 5,707