Summary of Significant Accounting Policies (Details 1) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Intangible Assets [Line Items]
Finite and Indefinite-Lived Intangible Assets, Gross, Total	$ 314,492	$ 312,408
Total Accumulated Amortization	(89,765)	(85,690)
Intangible Assets, Net (Excluding Goodwill)	224,727	226,718
Tradename (indefinite life) [Member]
Intangible Assets [Line Items]
Gross amount, Tradename (indefinite life)	35,614	35,562
Intangible Assets, Net (Excluding Goodwill)	35,614	35,562
Customer Relationships [Member]
Intangible Assets [Line Items]
Gross amount	199,197	198,527
Accumulated Amortization	(44,094)	(41,794)
Intangible Assets, Net (Excluding Goodwill)	155,103	156,733
Proven technology and patents [Member]
Intangible Assets [Line Items]
Gross amount	71,370	70,311
Accumulated Amortization	(40,395)	(38,890)
Intangible Assets, Net (Excluding Goodwill)	30,975	31,421
Tradename (indefinite life) [Member]
Intangible Assets [Line Items]
Gross amount	4,650	4,518
Accumulated Amortization	(2,943)	(2,807)
Intangible Assets, Net (Excluding Goodwill)	1,707	1,711
Other Intangible Assets [Member]
Intangible Assets [Line Items]
Gross amount	3,661	3,490
Accumulated Amortization	(2,333)	(2,199)
Intangible Assets, Net (Excluding Goodwill)	$ 1,328	$ 1,291