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EMPLOYEE BENEFIT PLANS (Tables)
6 Months Ended
Jun. 30, 2021
Retirement Benefits [Abstract]  
Schedule of Net Periodic Pension Cost (Credit) Net periodic pension credit includes the following components (in thousands):
 Three Months Ended June 30,Six Months Ended June 30,
 2021202020212020
(unaudited)(unaudited)(unaudited)(unaudited)
Interest cost$326 $426 648 $867 
Expected return on plan assets(509)(558)(1,012)$(1,135)
Amortization of prior service cost17 $16 
Net periodic pension credit$(174)$(124)$(347)$(252)