Summary of Significant Accounting Policies (Details 1) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Intangible Assets [Line Items]
Finite and Indefinite-Lived Intangible Assets, Gross, Total	$ 185,274	$ 182,238
Total Accumulated Amortization	(69,284)	(66,986)
Intangible Assets, Net (Excluding Goodwill)	115,990	115,252
Tradename (indefinite life) [Member]
Intangible Assets [Line Items]
Gross amount, Tradename (indefinite life)	24,815	24,814
Intangible Assets, Net (Excluding Goodwill)	24,815	24,814
Customer Relationships [Member]
Intangible Assets [Line Items]
Gross amount	99,264	98,175
Accumulated Amortization	(31,892)	(30,836)
Intangible Assets, Net (Excluding Goodwill)	67,372	67,339
Proven technology and patents [Member]
Intangible Assets [Line Items]
Gross amount	54,722	52,938
Accumulated Amortization	(33,470)	(32,444)
Intangible Assets, Net (Excluding Goodwill)	21,252	20,494
Tradename (indefinite life) [Member]
Intangible Assets [Line Items]
Gross amount	4,327	4,200
Accumulated Amortization	(2,200)	(2,158)
Intangible Assets, Net (Excluding Goodwill)	2,127	2,042
Other Intangible Assets [Member]
Intangible Assets [Line Items]
Gross amount	2,146	2,111
Accumulated Amortization	(1,722)	(1,548)
Intangible Assets, Net (Excluding Goodwill)	$ 424	$ 563