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Goodwill and Identified Intangible Assets - Summary of Goodwill and Identified Intangible Assets (Detail) - USD ($) $ in Thousands | 6 Months Ended |
--- | --- | ---
Jun. 28, 2019 | Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | $ 85,558 | $ 85,592
Accumulated Amortization | (76,918) | (72,775)
Total future amortization expense | $ 8,640 | 12,817
Developed Core Technology |  |
Finite-Lived Intangible Assets [Line Items] |  |
Useful Life | 8 months 12 days |
Gross Carrying Amount | $ 31,708 | 31,707
Accumulated Amortization | (28,167) | (25,576)
Total future amortization expense | $ 3,541 | 6,131
Customer relationships/contracts |  |
Finite-Lived Intangible Assets [Line Items] |  |
Useful Life | 1 year 8 months 12 days |
Gross Carrying Amount | $ 44,628 | 44,650
Accumulated Amortization | (39,632) | (38,146)
Total future amortization expense | $ 4,996 | 6,504
Trademarks and Trade Names |  |
Finite-Lived Intangible Assets [Line Items] |  |
Useful Life | 8 months 12 days |
Gross Carrying Amount | $ 618 | 623
Accumulated Amortization | (515) | (441)
Total future amortization expense | 103 | 182
Maintenance Agreements and Related Relationships |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 5,500 | 5,500
Accumulated Amortization | (5,500) | (5,500)
Total future amortization expense | 0 | 0
Order Backlog |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 3,104 | 3,112
Accumulated Amortization | (3,104) | (3,112)
Total future amortization expense | $ 0 | $ 0

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