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Summary of Significant Accounting Policies (Details 1) - USD ($) $ in Thousands | Jun. 30, 2016 | Dec. 31, 2015
--- | --- | ---
Intangible Assets [Line Items] |  |
Intangible Assets, Gross (Excluding Goodwill) | $ 184,607 | $ 182,238
Accumulated Amortization | (70,605) | (66,986)
Intangible Assets, Net (Excluding Goodwill) | 114,002 | 115,252
Tradename (indefinite life) [Member] |  |
Intangible Assets [Line Items] |  |
Gross amount, Tradename (indefinite life) | 24,788 | 24,814
Intangible Assets, Net (Excluding Goodwill) | 24,788 | 24,814
Customer Relationships [Member] |  |
Intangible Assets [Line Items] |  |
Gross amount | 98,867 | 98,175
Accumulated Amortization | (32,577) | (30,836)
Intangible Assets, Net (Excluding Goodwill) | 66,290 | 67,339
Proven technology and patents [Member] |  |
Intangible Assets [Line Items] |  |
Gross amount | 54,520 | 52,938
Accumulated Amortization | (34,060) | (32,444)
Intangible Assets, Net (Excluding Goodwill) | 20,460 | 20,494
Tradename (indefinite life) [Member] |  |
Intangible Assets [Line Items] |  |
Gross amount | 4,289 | 4,200
Accumulated Amortization | (2,212) | (2,158)
Intangible Assets, Net (Excluding Goodwill) | 2,077 | 2,042
Other Intangible Assets [Member] |  |
Intangible Assets [Line Items] |  |
Gross amount | 2,143 | 2,111
Accumulated Amortization | (1,756) | (1,548)
Intangible Assets, Net (Excluding Goodwill) | $ 387 | $ 563

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