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EMPLOYEE BENEFIT PLANS - Weighted-average assumptions used to determine net periodic benefit cost (Details) - Defined Benefit Pension Items
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
WEIGHTED AVERAGE ASSUMPTIONS:      
Discount rate 5.45% 2.81% 2.48%
Expected return on plan assets 7.00% 7.00% 7.00%
Ages 25-34      
WEIGHTED AVERAGE ASSUMPTIONS:      
Rate of compensation increase 5.00% 2.50% 2.50%
Ages 35-44      
WEIGHTED AVERAGE ASSUMPTIONS:      
Rate of compensation increase 4.00% 2.50% 2.50%
Ages 45-54      
WEIGHTED AVERAGE ASSUMPTIONS:      
Rate of compensation increase 3.00% 2.50% 2.50%
Ages 55+      
WEIGHTED AVERAGE ASSUMPTIONS:      
Rate of compensation increase 2.50% 2.50% 2.50%