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Summary of Significant Accounting Policies (Details 1) - USD ($)
$ in Thousands
Sep. 30, 2018
Dec. 31, 2017
Intangible Assets [Line Items]    
Intangible Assets, Gross (Excluding Goodwill) $ 316,535 $ 312,408
Accumulated Amortization (95,631) (85,690)
Intangible Assets, Net (Excluding Goodwill) 220,904 226,718
Tradename (indefinite life) [Member]    
Intangible Assets [Line Items]    
Gross amount, Tradename (indefinite life) 35,536 35,562
Intangible Assets, Net (Excluding Goodwill) 35,536 35,562
Customer Relationships [Member]    
Intangible Assets [Line Items]    
Gross amount 198,042 198,527
Accumulated Amortization (48,173) (41,794)
Intangible Assets, Net (Excluding Goodwill) 149,869 156,733
Proven technology and patents [Member]    
Intangible Assets [Line Items]    
Gross amount 74,732 70,311
Accumulated Amortization (42,036) (38,890)
Intangible Assets, Net (Excluding Goodwill) 32,696 31,421
Tradename (indefinite life) [Member]    
Intangible Assets [Line Items]    
Gross amount 4,557 4,518
Accumulated Amortization (2,904) (2,807)
Intangible Assets, Net (Excluding Goodwill) 1,653 1,711
Other Intangible Assets [Member]    
Intangible Assets [Line Items]    
Gross amount 3,668 3,490
Accumulated Amortization (2,518) (2,199)
Intangible Assets, Net (Excluding Goodwill) $ 1,150 $ 1,291