COMPREHENSIVE INCOME (LOSS) - Changes of AOCI (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Balance, beginning of period	$ 275,284	$ 262,381
Other comprehensive income (loss)	4,071	(2,269)
Balance, end of period	281,831	261,656
Unrealized (Losses) Gains on Securities
Balance, beginning of period	(37,084)	(38,878)
Other comprehensive income (loss)	4,034	(2,193)
Balance, end of period	(33,050)	(41,071)
Unfunded Retirement Obligations
Balance, beginning of period	323	441
Other comprehensive income (loss)	37	(76)
Balance, end of period	360	365
Accumulated Other Comprehensive (Loss) Income
Balance, beginning of period	(36,761)	(38,437)
Other comprehensive income (loss)	4,071	(2,269)
Balance, end of period	$ (32,690)	$ (40,706)