Summary of Significant Accounting Policies (Details 1) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Intangible Assets [Line Items]
Intangible Assets, Gross (Excluding Goodwill)	$ 316,558	$ 315,510
Accumulated Amortization	(105,347)	(98,202)
Intangible Assets, Net (Excluding Goodwill)	211,211	217,308
Tradename (indefinite life) [Member]
Intangible Assets [Line Items]
Gross amount, Tradename (indefinite life)	35,491	35,500
Intangible Assets, Net (Excluding Goodwill)	35,491	35,500
Customer Relationships [Member]
Intangible Assets [Line Items]
Gross amount	197,827	197,942
Accumulated Amortization	(54,520)	(49,887)
Intangible Assets, Net (Excluding Goodwill)	143,307	148,055
Proven technology and patents [Member]
Intangible Assets [Line Items]
Gross amount	74,924	73,880
Accumulated Amortization	(44,873)	(42,750)
Intangible Assets, Net (Excluding Goodwill)	30,051	31,130
Tradename (indefinite life) [Member]
Intangible Assets [Line Items]
Gross amount	4,598	4,504
Accumulated Amortization	(2,963)	(2,874)
Intangible Assets, Net (Excluding Goodwill)	1,635	1,630
Other Intangible Assets [Member]
Intangible Assets [Line Items]
Gross amount	3,718	3,684
Accumulated Amortization	(2,991)	(2,691)
Intangible Assets, Net (Excluding Goodwill)	$ 727	$ 993