Warranty - Information Regarding Warranty Accrual (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 02, 2016	Jul. 04, 2015	Jul. 02, 2016	Jul. 04, 2015
Guarantees [Abstract]
Accrued Warranty, Beginning of Period	$ 4,713	$ 3,608	$ 4,237	$ 3,302
Accrued Warranty, Acquired			264
Accrued Warranty, Charged to Expense	2,908	2,268	5,236	4,176
Accrued Warranty, Adjustments	413	58	770	247
Accrued Warranty, Settlements	(2,931)	(1,857)	(5,404)	(3,648)
Accrued Warranty, End of Period	$ 5,103	$ 4,077	$ 5,103	$ 4,077