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COMPONENTS OF PENSION PLAN NET PERIODIC BENEFIT COSTS (Details) - Defined benefit pension plan - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Components of net periodic benefit cost:    
Interest cost $ 932 $ 860
Expected return on plan assets (1,665) (1,671)
Amortization of prior service cost 47 47
Amortization of net loss 483 1,141
Net periodic benefit cost $ (203) $ 377