Victory Motorcycles Wind Down (Liability Balance) (Details) - Victory Motorcycles - Disposal Group, Disposed of by Means Other than Sale, Not Discontinued Operations, Abandonment $ in Thousands	6 Months Ended
	Jun. 30, 2017 USD ($)
Disposal Group, Including Discontinued Operation, Liabilities [Roll Forward]
Reserves balance as of January 1, 2017	$ 0
Expenses	37,705
Cash payments / scrapped inventory	(21,941)
Reserves balance as of June 30, 2017	15,764
Contract termination charges
Disposal Group, Including Discontinued Operation, Liabilities [Roll Forward]
Reserves balance as of January 1, 2017	0
Expenses	17,695
Cash payments / scrapped inventory	(11,860)
Reserves balance as of June 30, 2017	5,835
Inventory charges
Disposal Group, Including Discontinued Operation, Liabilities [Roll Forward]
Reserves balance as of January 1, 2017	0
Expenses	12,680
Cash payments / scrapped inventory	(4,516)
Reserves balance as of June 30, 2017	8,164
Other costs
Disposal Group, Including Discontinued Operation, Liabilities [Roll Forward]
Reserves balance as of January 1, 2017	0
Expenses	7,330
Cash payments / scrapped inventory	(5,565)
Reserves balance as of June 30, 2017	$ 1,765