COMPREHENSIVE INCOME (LOSS) - Changes of AOCI (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Balance, beginning of period	$ 249,325	$ 301,405
Other comprehensive (loss) income	7,081	(25,204)
Balance, end of period	255,568	276,208
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent
Balance, beginning of period	(50,370)	4,809
Other comprehensive (loss) income	7,099	(25,301)
Balance, end of period	(43,271)	(20,492)
Accumulated Defined Benefit Plans Adjustment Attributable to Parent
Balance, beginning of period	492	217
Other comprehensive (loss) income	(18)	97
Balance, end of period	474	314
Accumulated Other Comprehensive (Loss) Income
Balance, beginning of period	(49,878)	5,026
Other comprehensive (loss) income	7,081	(25,204)
Balance, end of period	$ (42,797)	$ (20,178)