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RETIREMENT PLANS (Detail)
 12 Months Ended
Dec. 31, 2023
USD ($)
plan
Dec. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Defined Benefit Plan Disclosure [Line Items]      
Plan participant service requirement, period 1 month    
Plan participant age required 18 years    
Maximum annual contributions per employee $ 66,000    
Maximum annual contributions per employee, percent 100.00%    
Employer matching contribution, percent of match of base contribution by employee 0.50    
Employer matching contribution, percent of employee contribution 6.00%    
Employer contribution expense $ 859,000 $ 780,000 $ 669,000
Deferred compensation arrangement      
Defined Benefit Plan Disclosure [Line Items]      
Age at which a director or his beneficiaries will receive a monthly retirement benefit 65 years    
Estimated present value of future benefits to be paid $ 0 18,000  
Plan expense 2,000 4,000 5,000
Supplemental discretionary deferred compensation plans      
Defined Benefit Plan Disclosure [Line Items]      
Plan expense 51,000 51,000 61,000
Trust account balance 2,200,000 2,000,000  
Supplemental retirement and salary continuation plans      
Defined Benefit Plan Disclosure [Line Items]      
Estimated present value of future benefits to be paid 14,900,000 13,600,000  
Plan expense $ 1,900,000 2,000,000 1,700,000
Number of supplemental retirement and salary continuation plans | plan 2    
Life insurance coverage post-retirement      
Defined Benefit Plan Disclosure [Line Items]      
Estimated present value of future benefits to be paid $ 1,800,000 1,700,000  
Plan expense $ 130,000 $ 105,000 $ 104,000