COMPREHENSIVE (LOSS) INCOME - Changes of AOCI (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Balance, beginning of period	$ 258,619	$ 304,133	$ 301,405	$ 299,756
Other comprehensive (loss) income	(20,467)	(2,871)	(61,495)	(5,390)
Balance, end of period	238,789	299,402	238,789	299,402
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent
Balance, beginning of period	(36,307)	9,167	4,809	11,676
Other comprehensive (loss) income	(20,459)	(2,867)	(61,575)	(5,376)
Balance, end of period	(56,766)	6,300	(56,766)	6,300
Accumulated Defined Benefit Plans Adjustment Attributable to Parent
Balance, beginning of period	305	109	217	119
Other comprehensive (loss) income	(8)	(4)	80	(14)
Balance, end of period	297	105	297	105
Accumulated Other Comprehensive (Loss) Income
Balance, beginning of period	(36,002)	9,276	5,026	11,795
Other comprehensive (loss) income	(20,467)	(2,871)	(61,495)	(5,390)
Balance, end of period	$ (56,469)	$ 6,405	$ (56,469)	$ 6,405