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EMPLOYEE RETIREMENT PLANS - Schedule of net periodic pension cost (Details)
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Defined Benefit Plan Disclosure [Line Items]    
Long-term rate of return on plan assets 7.00% 7.00%
Defined Benefit Pension Plan [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Discount rate for projected benefit obligation 2.47% 3.35%
Discount rate for determining interest cost 1.91% 2.92%
Long-term rate of return on plan assets 7.00% 7.00%
Supplemental Pension Plan [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Discount rate for projected benefit obligation 2.51% 3.38%
Discount rate for determining interest cost 2.10% 3.07%
Long-term rate of return on plan assets 0.00% 0.00%