Accumulated Other Comprehensive Loss - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Accumulated Other Comprehensive Income (Loss) [Line Items]
Foreign currency translation	$ 14,369	$ 2,625	$ 52,303	$ 6,863
Unrecognized Net Defined Benefit Plan Costs [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive (Loss) Reclassification Adjustment from AOCI, Pension and other Postretirement Benefit Plans, before tax	(600)		(2,500)
Benefit for Income Taxes	200		800
Amortization of net actuarial (losses), before tax	(1,300)		(4,800)
Net prior service credit arising during period, before tax	800		2,300
Accumulated Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Foreign currency translation	23,000		78,100
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Related to Net Investment Hedges, before Reclassification and Tax	(11,900)		(40,400)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period Related to Intra-Entity Transactions of a Long-Term Investment Nature, Net of Tax	(1,100)		(400)
Foreign currency translation, tax benefit related to net investment hedges	$ 4,400		$ 15,000