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EMPLOYEE AND POSTRETIREMENT BENEFIT PLANS - Stock-based Compensation Expense (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
STOCK-BASED COMPENSATION PLANS    
Share-based Payment Arrangement, Expense $ 1,214 $ 1,050
Restricted Stock    
STOCK-BASED COMPENSATION PLANS    
Share-based Payment Arrangement, Expense 1,214 1,050
Share-based Payment Arrangement, Option [Member]    
STOCK-BASED COMPENSATION PLANS    
Share-based Payment Arrangement, Expense $ 0 $ 0