Benefits Expected to Be Paid from Pension and Other Postretirement Benefit Plans, Which Reflect Future Years of Services (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Foreign Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Benefit obligation discount rate	1.90%	2.60%
Benefit obligation rate of compensation increase	3.50%	3.50%
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
2017	$ 37,463
2018	36,835
2019	38,080
2020	39,601
2021	40,989
2022-2026	220,138
Defined Benefit Plan, Expected Future Benefit Payments, Total	413,106
Other Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
2017	2,501
2018	2,045
2019	1,761
2020	1,557
2021	1,496
2022-2026	6,612
Defined Benefit Plan, Expected Future Benefit Payments, Total	$ 15,972