COMPREHENSIVE INCOME (LOSS) - Changes of AOCI (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Balance, beginning of period	$ 301,405	$ 299,756	$ 244,452
Other comprehensive (loss) income	(54,904)	(6,769)	8,104
Balance, end of period	249,325	301,405	299,756
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent
Balance, beginning of period	4,809	11,676	3,511
Other comprehensive (loss) income	(55,179)	(6,867)	8,165
Balance, end of period	(50,370)	4,809	11,676
Accumulated Defined Benefit Plans Adjustment Attributable to Parent
Balance, beginning of period	217	119	180
Other comprehensive (loss) income	275	98	(61)
Balance, end of period	492	217	119
Accumulated Other Comprehensive Income (Loss)
Balance, beginning of period	5,026	11,795	3,691
Other comprehensive (loss) income	(54,904)	(6,769)	8,104
Balance, end of period	$ (49,878)	$ 5,026	$ 11,795