Accrued Liabilities - Components of Accrued Liabilities (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Schedule Of Accrued Liabilities [Line Items]
Products liability	$ 70,267	$ 58,506
Payroll and withholdings	71,054	26,942
Warranty	24,285	22,078
Other postretirement benefits	16,680	17,802
Foreign currency derivative instruments	1,265	(5,869)
Other	38,271	32,847
Total accrued liabilities	$ 221,822	$ 152,306