Accumulated Other Comprehensive Loss - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During the Period Related to Translation of Foreign Subsidiaries Utilizing a Functional Currency Other Than the US Dollar	$ (25,016)	$ (4,576)	$ (24,213)	$ (26,397)
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	(3,500)		(10,300)
Benefit for Income Taxes	800		2,600
Amortization of net actuarial (losses), before tax	(4,100)		(12,000)
Net prior service credit arising during period, before tax	600		1,700
Accumulated Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During the Period Related to Translation of Foreign Subsidiaries Utilizing a Functional Currency Other Than the US Dollar	(36,100)		(37,700)
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	300		900
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Related to Net Investment Hedges, before Reclassification and Tax	14,100		16,500
Foreign currency translation, tax benefit (provision) related to net investment hedges	$ (3,300)		$ (3,900)