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Schedule of Amounts Recorded within Statements of Financial Position (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Defined Benefit Plan Disclosure
Retirement plans assets	$ 16,883	$ 17,491
UNITED STATES
Defined Benefit Plan Disclosure
Retirement plans assets	16,883	17,491
Accrued employees' compensation and withholdings	(2,676)	(2,524)
Retirement plans liabilities	(48,143)	(53,487)
Funded status	(33,936)	(38,520)
Foreign Pension Plans, Defined Benefit
Defined Benefit Plan Disclosure
Accrued employees' compensation and withholdings	(852)	(863)
Retirement plans liabilities	(36,894)	(37,183)
Funded status	(37,746)	(38,046)
Postretirement Benefit Plans
Defined Benefit Plan Disclosure
Accrued employees' compensation and withholdings	(1,310)	(591)
Retirement plans liabilities	(7,946)	(5,586)
Funded status	$ (9,256)	$ (6,177)

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