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Goodwill, Other Intangible Assets and Other Assets - Other Intangible Assets (Detail) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 26, 2020
Sep. 28, 2019
Sep. 26, 2020
Sep. 28, 2019
Dec. 28, 2019
Finite-Lived Intangible Assets [Line Items]          
Document Period End Date     Sep. 26, 2020    
Finite-Lived Intangible Assets, Gross $ 73,004   $ 73,004   $ 71,231
Intangible assets accumulated amortization 62,858   62,858   58,879
Intangible Assets, Net 10,146   10,146   12,352
Amortization of Acquired Intangible Assets 500 $ 3,400 2,500 $ 10,100  
Completed technology          
Finite-Lived Intangible Assets [Line Items]          
Finite-Lived Intangible Assets, Gross 28,100   28,100   28,100
Intangible assets accumulated amortization 26,300   26,300   24,605
Intangible Assets, Net 1,800   1,800   3,495
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 11,436   11,436   11,095
Intangible assets accumulated amortization 3,090   3,090   2,302
Intangible Assets, Net 8,346   8,346   8,793
Distribution Rights [Member]          
Finite-Lived Intangible Assets [Line Items]          
Finite-Lived Intangible Assets, Gross 33,100   33,100   31,680
Intangible assets accumulated amortization 33,100   33,100   31,680
Intangible Assets, Net 0   0   0
Noncompete Agreements [Member]          
Finite-Lived Intangible Assets [Line Items]          
Finite-Lived Intangible Assets, Gross 268   268   256
Intangible assets accumulated amortization 268   268   192
Intangible Assets, Net $ 0   $ 0   $ 64