Goodwill and Intangible Assets (Schedule of Finite-Lived Intangible Assets Future Amortization Expense) (Detail) - USD ($)	3 Months Ended	6 Months Ended
	Jun. 26, 2016	Jun. 26, 2016	Mar. 27, 2016	Dec. 31, 2015	Jun. 28, 2015	Mar. 29, 2015	Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Amortization expense on intangible assets	$ 1,800,000	$ 3,500,000
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Goodwill	54,542,000	54,542,000		$ 54,182,000	$ 26,105,000
Operating Segments | Motorcycles
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
2016 (remaining 6 months)	3,588,000	3,588,000
2017	4,346,000	4,346,000
2018	384,000	384,000
2019	384,000	384,000
2020	384,000	384,000
2021	384,000	384,000
Thereafter	5,111,000	5,111,000
Net	14,581,000	14,581,000		16,954,000
Goodwill	54,542,000	54,542,000	$ 54,585,000	54,182,000	26,105,000	$ 25,632,000	$ 27,752,000
Operating Segments | Financial Services
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Net	0	0		0	0
Goodwill	$ 0	$ 0		$ 0	$ 0