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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. 30, 2017 | Oct. 01, 2016 | Sep. 30, 2017 | Oct. 01, 2016 | Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Finite-Lived Intangible Assets, Gross | $ 35,640 |  | $ 35,640 |  | $ 27,000
Intangible assets accumulated amortization | 20,325 |  | 20,325 |  | 14,793
Intangible Assets, Net | 15,315 |  | 15,315 |  | 12,207
Amortization of Acquired Intangible Assets | 2,300 | $ 900 | 5,500 | $ 2,600 |
Completed technology |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Finite-Lived Intangible Assets, Gross | 26,900 |  | 26,900 |  | 26,900
Intangible assets accumulated amortization | 17,286 |  | 17,286 |  | 14,693
Intangible Assets, Net | 9,614 |  | 9,614 |  | 12,207
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 | 4,490 |  | 4,490 |  | 0
Intangible assets accumulated amortization | 173 |  | 173 |  | 0
Intangible Assets, Net | 4,317 |  | 4,317 |  | 0
Distribution Rights [Member] |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Finite-Lived Intangible Assets, Gross | 4,150 |  | 4,150 |  | 0
Intangible assets accumulated amortization | 2,766 |  | 2,766 |  | 0
Intangible Assets, Net | $ 1,384 |  | $ 1,384 |  | $ 0
Minimum [Member] |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Finite-Lived Intangible Asset, Useful Life |  |  | 9 months |  |

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