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Summary of Significant Accounting Policies (Details 1) - USD ($) $ in Thousands | Jun. 30, 2017 | Dec. 31, 2016
--- | --- | ---
Intangible Assets [Line Items] |  |
Intangible Assets, Gross (Excluding Goodwill) | $ 243,991 | $ 241,185
Accumulated Amortization | (79,857) | (74,130)
Intangible Assets, Net (Excluding Goodwill) | 164,134 | 167,055
Tradename (indefinite life) [Member] |  |
Intangible Assets [Line Items] |  |
Gross amount, Tradename (indefinite life) | 28,369 | 28,272
Intangible Assets, Net (Excluding Goodwill) | 28,369 | 28,272
Customer Relationships [Member] |  |
Intangible Assets [Line Items] |  |
Gross amount | 148,275 | 147,466
Accumulated Amortization | (37,831) | (34,672)
Intangible Assets, Net (Excluding Goodwill) | 110,444 | 112,794
Proven technology and patents [Member] |  |
Intangible Assets [Line Items] |  |
Gross amount | 59,884 | 58,394
Accumulated Amortization | (37,365) | (35,128)
Intangible Assets, Net (Excluding Goodwill) | 22,519 | 23,266
Tradename (indefinite life) [Member] |  |
Intangible Assets [Line Items] |  |
Gross amount | 4,421 | 4,182
Accumulated Amortization | (2,725) | (2,514)
Intangible Assets, Net (Excluding Goodwill) | 1,696 | 1,668
Other Intangible Assets [Member] |  |
Intangible Assets [Line Items] |  |
Gross amount | 3,042 | 2,871
Accumulated Amortization | (1,936) | (1,816)
Intangible Assets, Net (Excluding Goodwill) | $ 1,106 | $ 1,055

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