Employee Benefits - Sensitivity of Disclosures to Changes in Selected Assumptions (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012
U.S. Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
25 BP Decrease in Discount Rate, Change in PBO	$ 17,816
25 BP Decrease in Discount Rate, Change in ABO	17,687
25 BP Decrease in Discount Rate, Change in pension expense	1,181
25 BP Decrease in Long-Term Rate of Return, Change in pension expense	843
Non-U.S. Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
25 BP Decrease in Discount Rate, Change in PBO	33,889
25 BP Decrease in Discount Rate, Change in ABO	31,185
25 BP Decrease in Discount Rate, Change in pension expense	2,733
25 BP Decrease in Long-Term Rate of Return, Change in pension expense	1,929
Postretirement Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
25 BP Decrease in Discount Rate, Change in ABO	3,677
25 BP Decrease in Discount Rate, Change in pension expense	$ 236