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EMPLOYEE RETIREMENT PLANS (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
EMPLOYEE RETIREMENT PLANS    
Service cost $ 382 $ 383
Interest cost 1,487 2,012
Expected return on plan assets (2,907) (2,761)
Net amortization and deferral 1,012 763
Pension (benefit) expense $ (26) $ 397