U.K. Pension Plan Major Categories of Plan Assets (Details) - Freightliner U.K. Pension Plan [Member] - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015	Mar. 25, 2015
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 270,169	$ 277,308	$ 274,787
Growth pooled fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	182,630	182,697
Private Equity Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	29,463	31,237
Government bond pooled fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	47,030	52,463
Infrastructure pooled fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	8,536	10,911
Long-term income pooled fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 2,510	$ 0