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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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