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Intangible Assets (Details) - USD ($) $ in Thousands | Apr. 01, 2018 | Dec. 31, 2017
--- | --- | ---
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Value | $ 60,724 | $ 60,724
Accumulated Amortization | 48,304 | 47,535
Net Carrying Value | 12,420 | 13,189
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract] |  |
Remainder of fiscal 2018 | 2,307 |
2019 | 2,701 |
2020 | 2,185 |
2021 | 2,017 |
2022 | 1,691 |
2023 | 989 |
Thereafter | 530 |
Net Carrying Value | 12,420 | 13,189
Distribution networks |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Value | 38,060 | 38,060
Accumulated Amortization | 38,060 | 38,060
Net Carrying Value | 0 | 0
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract] |  |
Net Carrying Value | 0 | 0
Completed technologies |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Value | 13,687 | 13,687
Accumulated Amortization | 4,791 | 4,181
Net Carrying Value | 8,896 | 9,506
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract] |  |
Net Carrying Value | 8,896 | 9,506
Customer relationships |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Value | 8,607 | 8,607
Accumulated Amortization | 5,330 | 5,202
Net Carrying Value | 3,277 | 3,405
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract] |  |
Net Carrying Value | 3,277 | 3,405
Non-compete agreements |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Value | 370 | 370
Accumulated Amortization | 123 | 92
Net Carrying Value | 247 | 278
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract] |  |
Net Carrying Value | $ 247 | $ 278

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