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Summary of Significant Accounting Policies (Details 1) - USD ($) $ in Thousands | Sep. 30, 2015 | Dec. 31, 2014
--- | --- | ---
Intangible Assets [Line Items] |  |
Intangible Assets, Gross (Excluding Goodwill) | $ 179,689 | $ 174,573
Accumulated Amortization | (65,334) | (61,789)
Intangible Assets, Net (Excluding Goodwill) | 114,355 | 112,784
Tradename (indefinite life) [Member] |  |
Intangible Assets [Line Items] |  |
Gross amount, Tradename (indefinite life) | 24,805 | 24,947
Intangible Assets, Net (Excluding Goodwill) | 24,805 | 24,947
Customer Relationships [Member] |  |
Intangible Assets [Line Items] |  |
Gross amount | 98,211 | 98,325
Accumulated Amortization | (29,836) | (28,159)
Intangible Assets, Net (Excluding Goodwill) | 68,375 | 70,166
Proven technology and patents [Member] |  |
Intangible Assets [Line Items] |  |
Gross amount | 50,349 | 45,588
Accumulated Amortization | (31,957) | (30,761)
Intangible Assets, Net (Excluding Goodwill) | 18,392 | 14,827
Tradename (indefinite life) [Member] |  |
Intangible Assets [Line Items] |  |
Gross amount | 4,215 | 4,140
Accumulated Amortization | (2,250) | (1,786)
Intangible Assets, Net (Excluding Goodwill) | 1,965 | 2,354
Other Intangible Assets [Member] |  |
Intangible Assets [Line Items] |  |
Gross amount | 2,109 | 1,573
Accumulated Amortization | (1,291) | (1,083)
Intangible Assets, Net (Excluding Goodwill) | $ 818 | $ 490

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