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PENSION AND OTHER BENEFIT PLANS - Amounts Recognized in AOCI, Net of Tax (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Amounts recognized in AOCI, net of tax      
Total $ (4,097) $ 15,831 $ (13,403)
Pension Benefits [Member]      
Amounts recognized in AOCI, net of tax      
Prior service (credit)/cost (620) (648)  
Net (gain) loss (3,720) 16,593  
Total (4,340) 15,945  
Post-retirement Benefits      
Amounts recognized in AOCI, net of tax      
Prior service (credit)/cost 135 135  
Net (gain) loss 108 (249)  
Total $ 243 $ (114)