Summary of Significant Accounting Policies (Details 1) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Intangible Assets [Line Items]
Intangible Assets, Gross (Excluding Goodwill)	$ 311,618	$ 312,408
Accumulated Amortization	(91,760)	(85,690)
Intangible Assets, Net (Excluding Goodwill)	219,858	226,718
Tradename (indefinite life) [Member]
Intangible Assets [Line Items]
Gross amount, Tradename (indefinite life)	35,520	35,562
Intangible Assets, Net (Excluding Goodwill)	35,520	35,562
Customer Relationships [Member]
Intangible Assets [Line Items]
Gross amount	197,817	198,527
Accumulated Amortization	(45,864)	(41,794)
Intangible Assets, Net (Excluding Goodwill)	151,953	156,733
Proven technology and patents [Member]
Intangible Assets [Line Items]
Gross amount	70,156	70,311
Accumulated Amortization	(40,720)	(38,890)
Intangible Assets, Net (Excluding Goodwill)	29,436	31,421
Tradename (indefinite life) [Member]
Intangible Assets [Line Items]
Gross amount	4,494	4,518
Accumulated Amortization	(2,817)	(2,807)
Intangible Assets, Net (Excluding Goodwill)	1,677	1,711
Other Intangible Assets [Member]
Intangible Assets [Line Items]
Gross amount	3,631	3,490
Accumulated Amortization	(2,359)	(2,199)
Intangible Assets, Net (Excluding Goodwill)	$ 1,272	$ 1,291

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Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 928
-SubTopic 340
-Section 50
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