U.K. Pension Plan Amount Recognized in Balance Sheet (Details) - Freightliner U.K. Pension Plan [Member] - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Pension and Other Postretirement Defined Benefit Plans, Liabilities [Abstract]
Accrued expenses	$ 9,047	$ 7,994
Other long-term liabilities	84,986	62,731
Total amount recognized in the Consolidated Balance Sheet	$ 94,033	$ 70,725