OTHER COMPREHENSIVE INCOME (LOSS)-AOCI (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance, January 1	$ 9,764	$ (7,501)
Change in other comprehensive income before reclassification	(13,659)	15,965
Amounts reclassified from accumulated other comprehensive income	1,469	1,300
Net current period other comprehensive income (loss)	(12,190)	17,265
Ending balance, December 31	(2,426)	9,764
Unrealized Gains and Losses on Available-for-Sale Securities
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance, January 1	34,162	14,893
Change in other comprehensive income before reclassification	(18,403)	19,444
Amounts reclassified from accumulated other comprehensive income	(85)	(175)
Net current period other comprehensive income (loss)	(18,488)	19,269
Ending balance, December 31	15,674	34,162
Retirement Plans
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance, January 1	(24,398)	(22,394)
Change in other comprehensive income before reclassification	4,744	(3,479)
Amounts reclassified from accumulated other comprehensive income	1,554	1,475
Net current period other comprehensive income (loss)	6,298	(2,004)
Ending balance, December 31	$ (18,100)	$ (24,398)