Summary of Significant Accounting Policies (Details 1) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Intangible Assets [Line Items]
Intangible Assets, Gross (Excluding Goodwill)	$ 174,507	$ 171,772
Accumulated Amortization	(60,250)	(57,354)
Intangible Assets, Net (Excluding Goodwill)	114,257	114,418
Tradename (indefinite life) [Member]
Intangible Assets [Line Items]
Gross amount, Tradename (indefinite life)	25,105	25,108
Intangible Assets, Net (Excluding Goodwill)	25,105	25,108
Customer Relationships [Member]
Intangible Assets [Line Items]
Gross amount	100,342	98,374
Accumulated Amortization	(27,009)	(25,313)
Intangible Assets, Net (Excluding Goodwill)	73,333	73,061
Proven technology and patents [Member]
Intangible Assets [Line Items]
Gross amount	43,086	43,233
Accumulated Amortization	(30,554)	(29,763)
Intangible Assets, Net (Excluding Goodwill)	12,532	13,470
Tradename (finite life) [Member]
Intangible Assets [Line Items]
Gross amount	4,375	4,300
Accumulated Amortization	(1,832)	(1,619)
Intangible Assets, Net (Excluding Goodwill)	2,543	2,681
Other Intangible Assets [Member]
Intangible Assets [Line Items]
Gross amount	1,599	757
Accumulated Amortization	(855)	(659)
Intangible Assets, Net (Excluding Goodwill)	$ 744	$ 98