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Employee Benefit Plans - Schedule of Assets by Investment Type (Detail) - USD ($)
$ in Thousands
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Fair Value, Inputs, Level 1, 2 and 3      
Asset Category      
Defined Benefit Plan, Fair Value of Plan Assets, Excluding Net Asset Value Investments [1] $ 49,432 $ 41,257  
FPU Pension Plan      
Asset Category      
Percentage of assets by investment type 100.00% 100.00% 100.00%
FPU Pension Plan | Investments in equity securities      
Asset Category      
Percentage of assets by investment type 50.00% 53.00% 52.00%
FPU Pension Plan | Debt securities      
Asset Category      
Percentage of assets by investment type 49.00% 38.00% 38.00%
FPU Pension Plan | Other      
Asset Category      
Percentage of assets by investment type 1.00% 9.00% 10.00%
[1]
(8) All investments in the FPU Pension Plan are classified as Level 1 within the Fair Value hierarchy exclusive of the Guaranteed Deposit Account which is classified as Level 3.