PENSION PLANS - Pension expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
COMPONENTS OF NET PERIODIC COST:
Interest cost	$ 694	$ 665	$ 658
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Excluding Service Cost, Statement of Income or Comprehensive Income [Extensible Enumeration]	Pension and Other Postretirement Benefits Cost (Reversal of Cost)	Pension and Other Postretirement Benefits Cost (Reversal of Cost)	Pension and Other Postretirement Benefits Cost (Reversal of Cost)
Gain on assets	$ (953)	$ (842)	$ (758)
Amortization of loss		105	247
Net periodic (benefit) cost	$ (259)	$ (72)	$ 147
WEIGHTED-AVERAGE ASSUMPTION USED:
Discount rate	5.00%	5.00%	5.00%
Rate of compensation increase	0.00%	0.00%	0.00%