Additional Balance Sheet and Cash Flow Information (Accrued Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Accrued Liabilities, Current [Abstract]
Payroll, employee benefits and related expenses	$ 124,093	$ 148,221
Warranty and recalls	75,089	57,698
Sales incentive programs	48,309	43,218
Tax-related accruals	25,944	26,140
Derivative Liability, Current	21,308	142
Accrued interest	40,347	42,788
Other	194,732	168,445
Total accrued liabilities	$ 529,822	$ 486,652