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Goodwill and Identified Intangible Assets - Summary of Goodwill and Identified Intangible Assets (Detail) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 29, 2019 | Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | $ 85,487 | $ 85,592
Accumulated Amortization | (74,783) | (72,775)
Total future amortization expense | $ 10,704 | 12,817
Developed Core Technology |  |
Finite-Lived Intangible Assets [Line Items] |  |
Useful Life | 10 months 24 days |
Gross Carrying Amount | $ 31,707 | 31,707
Accumulated Amortization | (26,871) | (25,576)
Total future amortization expense | $ 4,836 | 6,131
Customer relationships/contracts |  |
Finite-Lived Intangible Assets [Line Items] |  |
Useful Life | 1 year 10 months 24 days |
Gross Carrying Amount | $ 44,583 | 44,650
Accumulated Amortization | (38,855) | (38,146)
Total future amortization expense | $ 5,728 | 6,504
Trademarks and Trade Names |  |
Finite-Lived Intangible Assets [Line Items] |  |
Useful Life | 10 months 24 days |
Gross Carrying Amount | $ 610 | 623
Accumulated Amortization | (470) | (441)
Total future amortization expense | 140 | 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 | 3,087 | 3,112
Accumulated Amortization | (3,087) | (3,112)
Total future amortization expense | $ 0 | $ 0

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