Employee Benefit Plans - Amounts Recognized in Accumulated Other Comprehensive Loss (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Non-U.S.
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss	$ 2,258	$ 17,035
Deferred income tax asset	(375)	(3,120)
Accumulated other comprehensive loss	1,883	13,915
U.S.
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss	39,569	34,200
Deferred income tax asset	(13,849)	(12,250)
Accumulated other comprehensive loss	$ 25,720	$ 21,950