Summary of Significant Accounting Policies (Details 1) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Intangible Assets [Line Items]
Intangible Assets, Gross (Excluding Goodwill)	$ 174,055	$ 174,573
Accumulated Amortization	(64,399)	(61,789)
Intangible Assets, Net (Excluding Goodwill)	109,656	112,784
Tradename (indefinite life) [Member]
Intangible Assets [Line Items]
Gross amount, Tradename (indefinite life)	24,775	24,947
Intangible Assets, Net (Excluding Goodwill)	24,775	24,947
Customer Relationships [Member]
Intangible Assets [Line Items]
Gross amount	97,396	98,325
Accumulated Amortization	(29,098)	(28,159)
Intangible Assets, Net (Excluding Goodwill)	68,298	70,166
Proven technology and patents [Member]
Intangible Assets [Line Items]
Gross amount	46,012	45,588
Accumulated Amortization	(31,890)	(30,761)
Intangible Assets, Net (Excluding Goodwill)	14,122	14,827
Tradename (indefinite life) [Member]
Intangible Assets [Line Items]
Gross amount	4,317	4,140
Accumulated Amortization	(2,230)	(1,786)
Intangible Assets, Net (Excluding Goodwill)	2,087	2,354
Other Intangible Assets [Member]
Intangible Assets [Line Items]
Gross amount	1,555	1,573
Accumulated Amortization	(1,181)	(1,083)
Intangible Assets, Net (Excluding Goodwill)	$ 374	$ 490