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Summary of Significant Accounting Policies (Details 1) - USD ($) $ in Thousands | Sep. 30, 2019 | Dec. 31, 2018
--- | --- | ---
Intangible Assets [Line Items] |  |
Intangible Assets, Gross (Excluding Goodwill) | $ 318,328 | $ 315,510
Accumulated Amortization | (108,957) | (98,202)
Intangible Assets, Net (Excluding Goodwill) | 209,371 | 217,308
Tradename (indefinite life) [Member] |  |
Intangible Assets [Line Items] |  |
Gross amount, Tradename (indefinite life) | 35,442 | 35,500
Intangible Assets, Net (Excluding Goodwill) | 35,442 | 35,500
Customer Relationships [Member] |  |
Intangible Assets [Line Items] |  |
Gross amount | 197,467 | 197,942
Accumulated Amortization | (56,508) | (49,887)
Intangible Assets, Net (Excluding Goodwill) | 140,959 | 148,055
Proven technology and patents [Member] |  |
Intangible Assets [Line Items] |  |
Gross amount | 75,482 | 73,880
Accumulated Amortization | (46,076) | (42,750)
Intangible Assets, Net (Excluding Goodwill) | 29,406 | 31,130
Tradename (indefinite life) [Member] |  |
Intangible Assets [Line Items] |  |
Gross amount | 4,482 | 4,504
Accumulated Amortization | (2,981) | (2,874)
Intangible Assets, Net (Excluding Goodwill) | 1,501 | 1,630
Other Intangible Assets [Member] |  |
Intangible Assets [Line Items] |  |
Gross amount | 5,455 | 3,684
Accumulated Amortization | (3,392) | (2,691)
Intangible Assets, Net (Excluding Goodwill) | $ 2,063 | $ 993

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