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EMPLOYEE BENEFIT PLANS - Components of net periodic cost (benefit) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
EMPLOYEE BENEFIT PLANS      
Pension settlement loss $ 1,180   $ 647
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Settlement Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Selling, General and Administrative Expense    
Retirement Income Plan      
EMPLOYEE BENEFIT PLANS      
Service cost for benefits earned during the period $ 0 $ 0  
Interest cost 133 147 230
Expected return on plan assets   (289) (292)
Amortization of net losses 113 73 98
Pension settlement loss 1,180   647
Net periodic cost (benefit) $ 1,426 $ (69) $ 683