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POSTRETIREMENT BENEFIT PLANS (Tables)
3 Months Ended
Mar. 31, 2022
Retirement Benefits [Abstract]  
Schedule of Net Benefit Costs
PRINCIPAL PENSION PLANSThree months ended March 31
20222021
Service cost for benefits earned$49 $64 
Prior service cost amortization
Expected return on plan assets(786)(763)
Interest cost on benefit obligations517 486 
Net actuarial loss amortization361 864 
Benefit plans cost$143 $658