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EMPLOYEE BENEFIT PLANS - Components of Net Periodic Benefit (Detail) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Net periodic cost (benefit):        
Net periodic (benefit) cost $ (100) $ 71 $ (302) $ 212
Pension Plan [Member]        
Net periodic cost (benefit):        
Interest cost 900 950 2,702 2,850
Expected return on plan assets (1,017) (886) (3,053) (2,657)
Net periodic (benefit) cost $ (117) $ 64 $ (351) $ 193
Defined Benefit Plan Net Periodic Benefit Cost Credit Interest Cost Statement Of Income Or Comprehensive Income Extensible List Other Noninterest Expense Other Noninterest Expense Other Noninterest Expense Other Noninterest Expense
Defined Benefit Plan Net Periodic Benefit Cost Credit Expected Return Loss Statement Of Income Or Comprehensive Income Extensible List Other Noninterest Expense Other Noninterest Expense Other Noninterest Expense Other Noninterest Expense
Postretirement Benefit Plan [Member] | Other Expenses [Member]        
Net periodic cost (benefit):        
Net periodic (benefit) cost $ 17 $ 7 $ 49 $ 19