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Intangible Assets (Details) - USD ($) $ in Thousands | Mar. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Value | $ 60,724 | $ 60,724
Accumulated Amortization | 51,380 | 50,611
Net Carrying Value | 9,344 | 10,113
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract] |  |
Remainder of fiscal 2019 | 1,932 |
2019 | 2,185 |
2020 | 2,017 |
2021 | 1,691 |
2022 | 989 |
2023 | 422 |
Thereafter | 108 |
Net Carrying Value | 9,344 | 10,113
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 | 7,230 | 6,619
Net Carrying Value | 6,457 | 7,068
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract] |  |
Net Carrying Value | 6,457 | 7,068
Customer relationships |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Value | 8,607 | 8,607
Accumulated Amortization | 5,844 | 5,716
Net Carrying Value | 2,763 | 2,891
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract] |  |
Net Carrying Value | 2,763 | 2,891
Non-compete agreements |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Value | 370 | 370
Accumulated Amortization | 246 | 216
Net Carrying Value | 124 | 154
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract] |  |
Net Carrying Value | $ 124 | $ 154

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