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Schedule of Amounts Recorded within Statements of Financial Position (Detail) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Defined Benefit Plan Disclosure [Line Items] |  |
Retirement plans assets | $ 17,468 | $ 18,457
UNITED STATES |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Retirement plans assets | 17,468 | 18,457
Accrued employees' compensation and withholdings | (3,273) | (2,826)
Retirement plans liabilities | (57,573) | (52,490)
Funded status | (43,378) | (36,859)
Foreign Pension Plans, Defined Benefit |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Retirement plans assets | 0 |
Accrued employees' compensation and withholdings | (1,019) | (922)
Retirement plans liabilities | (48,113) | (41,444)
Funded status | (49,132) | (42,366)
Postretirement Benefit Plans |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Accrued employees' compensation and withholdings | (1,161) | (1,231)
Retirement plans liabilities | (7,354) | (7,772)
Funded status | $ (8,515) | $ (9,003)

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