PENSION PLANS - Fair values and asset allocation (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Fair Value	$ 12,617	$ 15,940	$ 14,568
Level 1
Fair Value	$ 12,617	$ 15,940
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	100.00%	100.00%
Cash and Cash Equivalents | Level 1
Fair Value	$ 748	$ 928
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	6.00%	6.00%
Cash and Cash Equivalents | Level 1 | Maximum
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	10.00%
Cash and Cash Equivalents | Level 1 | Minimum
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	0.00%
Equity Securities | Level 1
Fair Value	$ 8,870	$ 9,678
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	61.00%	61.00%
Equity Securities | Level 1 | Maximum
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	57.00%
Equity Securities | Level 1 | Minimum
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	40.00%
Fixed income securities | Level 1
Fair Value	$ 2,999	$ 5,334
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	33.00%	33.00%
Fixed income securities | Level 1 | Maximum
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	50.00%
Fixed income securities | Level 1 | Minimum
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	35.00%