Benefits Expected to Be Paid from Pension and Other Postretirement Benefit Plans, Which Reflect Future Years of Services (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Foreign Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Benefit obligation discount rate	2.60%	2.00%
Benefit obligation rate of compensation increase	3.50%	3.50%
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
2016	$ 34,507
2017	34,750
2018	36,157
2019	37,456
2020	39,091
2021-2025	213,615
Defined Benefit Plan, Expected Future Benefit Payments, Total	395,576
Other Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
2016	2,672
2017	2,393
2018	2,210
2019	2,178
2020	2,081
2021-2025	9,627
Defined Benefit Plan, Expected Future Benefit Payments, Total	$ 21,161