Goodwill and Intangible Assets (Schedule of Intangible Assets) (Detail) - Operating Segments - Motorcycles - USD ($) $ in Thousands	9 Months Ended
	Sep. 25, 2016	Dec. 31, 2015	Sep. 27, 2015
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 20,892	$ 19,730	$ 20,516
Accumulated Amortization	(8,231)	(2,776)	(1,155)
Net	12,661	16,954	19,361
Reacquired Distribution Rights
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	13,357	12,614	13,117
Accumulated Amortization	(7,792)	(2,628)	(1,093)
Net	$ 5,565	9,986	12,024
Estimated useful life (years)	2 years
Customer Relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 7,535	7,116	7,399
Accumulated Amortization	(439)	(148)	(62)
Net	$ 7,096	$ 6,968	$ 7,337
Estimated useful life (years)	20 years