Employee Benefit Plans - Schedule of Assets by Investment Type (Detail) - USD ($) $ in Thousands		Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Fair Value, Inputs, Level 1, 2 and 3
Asset Category
Defined Benefit Plan, Fair Value of Plan Assets, Excluding Net Asset Value Investments	[1]	$ 41,257	$ 51,930
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		53.00%	52.00%	54.00%
FPU Pension Plan | Debt securities
Asset Category
Percentage of assets by investment type		38.00%	38.00%	37.00%
FPU Pension Plan | Other
Asset Category
Percentage of assets by investment type		9.00%	10.00%	9.00%

[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.