Benefits Expected to Be Paid from Pension and Other Postretirement Benefit Plans, Which Reflect Future Years of Services (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Foreign Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Benefit obligation discount rate	2.00%	3.70%
Benefit obligation rate of compensation increase	3.50%	3.50%
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
2014	32,484
2015	33,858
2016	35,548
2017	37,011
2018	38,447
2020 — 2024	213,313
Defined Benefit Plan, Expected Future Benefit Payments, Total	390,661
Other Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
2014	3,094
2015	2,872
2016	2,737
2017	2,660
2018	2,605
2020 — 2024	12,218
Defined Benefit Plan, Expected Future Benefit Payments, Total	26,186