Defined Contribution Plans, 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, 2016	Dec. 31, 2015
Defined Benefit Plan Disclosure [Line Items]
Total recognized in other comprehensive income (loss)	$ (6,046)	$ 2,785
U.S. Pension and Other Post-Retirement Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Actuarial loss (gain)	551	(1,172)
Amortization of actuarial (gain) loss	(308)	(336)
Prior Service credit	(6)	(6)
Total recognized in other comprehensive income (loss)	237	(1,514)
Non-U.S. Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Actuarial loss (gain)	6,001	(994)
Amortization of actuarial (gain) loss	(193)	(275)
Prior Service credit	0	0
Total recognized in other comprehensive income (loss)	$ 5,808	$ (1,269)