Accrued Liabilities (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Accrued Liabilities, Current [Abstract]
Products liability	$ 58,506	$ 41,892
Payroll and withholdings	26,942	45,862
Warranty	22,078	19,669
Other postretirement benefits	17,802	17,692
Foreign currency derivative instruments	(5,869)	3,977
Other	32,847	23,272
Accrued liabilities	$ 152,306	$ 152,364