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Retirement Plans - Schedule of Pension Plan Asset Allocation and Target Allocation by Asset Category (Detail)
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Defined Benefit Plan Disclosure [Line Items]      
Percentage of Plan Assets at Year-end   100.00% 100.00%
Equity Securities [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Percentage of Plan Assets at Year-end   20.00% 20.00%
Equity Securities [Member] | Minimum [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Target Allocation 0.00%    
Equity Securities [Member] | Maximum [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Target Allocation 30.00%    
Debt Securities [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Percentage of Plan Assets at Year-end   80.00% 80.00%
Debt Securities [Member] | Minimum [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Target Allocation 70.00%    
Debt Securities [Member] | Maximum [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Target Allocation 100.00%