Defined Contribution Plan, Pension and Other Post-Retirement Benefit Plans - Amounts Recognized as Other Changes in Plan Assets and Benefit Obligations in Other Comprehensive Income (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Other Postretirement Benefit Plans | U.S. Pension and Other Post-Retirement Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Actuarial (gain) loss	$ (1,001)	$ 1,266
Amortization of actuarial (loss) gain	(2,829)	(263)
Prior service credit	(6)	(6)
Total recognized in other comprehensive income (loss)	(3,836)	997
Pension Plans | Non-U.S. Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Actuarial (gain) loss	968	245
Amortization of actuarial (loss) gain	(37)	781
Prior service credit	(416)	(491)
Total recognized in other comprehensive income (loss)	$ 515	$ 535