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EMPLOYEE BENEFITS - Net Periodic Benefit Cost and Postretirement Benefit Cost (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Retirement Plan      
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]      
Interest cost $ 3,620 $ 3,771 $ 2,741
Expected return on assets (4,857) (4,573) (5,845)
Net loss amortization 578 726 640
Gain recognized due to settlement 0 0 0
Net periodic benefit cost (income) (659) (76) (2,464)
Retirement Plan Acquired      
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]      
Interest cost 105 126 102
Expected return on assets (180) (187) (232)
Gain recognized due to settlement 0 (16) 0
Net periodic benefit cost (income) (75) (77) (130)
Restoration Plan      
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]      
Interest cost 859 831 578
Net loss amortization 51 30 255
Gain recognized due to settlement 0 0 0
Net periodic benefit cost (income) $ 910 $ 861 $ 833