Goodwill, Other Intangible Assets and Other Assets - Other Intangible Assets (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 29, 2018	Sep. 30, 2017	Sep. 29, 2018	Sep. 30, 2017	Dec. 30, 2017
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	$ 71,690		$ 71,690		$ 72,629
Intangible assets accumulated amortization	42,305		42,305		27,917
Intangible Assets, Net	29,385		29,385		44,712
Amortization of Acquired Intangible Assets	4,800	$ 2,400	14,800	$ 5,500
Completed technology
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	26,900		26,900		26,900
Intangible assets accumulated amortization	20,743		20,743		18,150
Intangible Assets, Net	6,157		6,157		8,750
Trade Names
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	100		100		100
Intangible assets accumulated amortization	100		100		100
Intangible Assets, Net	0		0		0
Customer-Related Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	11,414		11,414		11,594
Intangible assets accumulated amortization	1,138		1,138		418
Intangible Assets, Net	10,276		10,276		11,176
Distribution Rights [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	33,008		33,008		33,760
Intangible assets accumulated amortization	20,236		20,236		9,226
Intangible Assets, Net	12,772		12,772		24,534
Noncompete Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	268		268		275
Intangible assets accumulated amortization	88		88		23
Intangible Assets, Net	$ 180		$ 180		$ 252