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Summary of Significant Accounting Policies (Details 1) - USD ($) $ in Thousands | Jun. 30, 2019 | Dec. 31, 2018
--- | --- | ---
Intangible Assets [Line Items] |  |
Intangible Assets, Gross (Excluding Goodwill) | $ 316,558 | $ 315,510
Accumulated Amortization | (105,347) | (98,202)
Intangible Assets, Net (Excluding Goodwill) | 211,211 | 217,308
Tradename (indefinite life) [Member] |  |
Intangible Assets [Line Items] |  |
Gross amount, Tradename (indefinite life) | 35,491 | 35,500
Intangible Assets, Net (Excluding Goodwill) | 35,491 | 35,500
Customer Relationships [Member] |  |
Intangible Assets [Line Items] |  |
Gross amount | 197,827 | 197,942
Accumulated Amortization | (54,520) | (49,887)
Intangible Assets, Net (Excluding Goodwill) | 143,307 | 148,055
Proven technology and patents [Member] |  |
Intangible Assets [Line Items] |  |
Gross amount | 74,924 | 73,880
Accumulated Amortization | (44,873) | (42,750)
Intangible Assets, Net (Excluding Goodwill) | 30,051 | 31,130
Tradename (indefinite life) [Member] |  |
Intangible Assets [Line Items] |  |
Gross amount | 4,598 | 4,504
Accumulated Amortization | (2,963) | (2,874)
Intangible Assets, Net (Excluding Goodwill) | 1,635 | 1,630
Other Intangible Assets [Member] |  |
Intangible Assets [Line Items] |  |
Gross amount | 3,718 | 3,684
Accumulated Amortization | (2,991) | (2,691)
Intangible Assets, Net (Excluding Goodwill) | $ 727 | $ 993

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