Goodwill, Other Intangible Assets and Other Assets - Other Intangible Assets (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 28, 2020	Mar. 30, 2019	Dec. 28, 2019
Finite-Lived Intangible Assets [Line Items]
Document Period End Date	Mar. 28, 2020
Finite-Lived Intangible Assets, Gross	$ 71,067		$ 71,231
Intangible assets accumulated amortization	59,280		58,879
Intangible Assets, Net	11,787		12,352
Amortization of Acquired Intangible Assets	500	$ 3,300
Completed technology
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	28,100		28,100
Intangible assets accumulated amortization	24,890		24,605
Intangible Assets, Net	3,210		3,495
Trade Names
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	100		100
Intangible assets accumulated amortization	100		100
Intangible Assets, Net	0		0
Customer-Related Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	11,064		11,095
Intangible assets accumulated amortization	2,529		2,302
Intangible Assets, Net	8,535		8,793
Distribution Rights [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	31,549		31,680
Intangible assets accumulated amortization	31,549		31,680
Intangible Assets, Net	0		0
Noncompete Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	254		256
Intangible assets accumulated amortization	212		192
Intangible Assets, Net	$ 42		$ 64