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EMPLOYEE BENEFIT PLANS - Weighted-average assumptions used to determine benefit obligations (Details)
Dec. 31, 2022
Dec. 31, 2021
WEIGHTED AVERAGE ASSUMPTIONS:    
Discount rate 5.45% 2.80%
Ages 30-34    
WEIGHTED AVERAGE ASSUMPTIONS:    
Salary scale 5.00% 2.50%
Ages 35-44    
WEIGHTED AVERAGE ASSUMPTIONS:    
Salary scale 4.00% 2.50%
Ages 45-54    
WEIGHTED AVERAGE ASSUMPTIONS:    
Salary scale 3.00% 2.50%
Ages 55+    
WEIGHTED AVERAGE ASSUMPTIONS:    
Salary scale 2.50% 2.50%