Summary of Significant Accounting Policies (Details 1) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Intangible Assets [Line Items]
Finite and Indefinite-Lived Intangible Assets, Gross, Total	$ 171,731	$ 171,772
Total Accumulated Amortization	(58,812)	(57,354)
Intangible Assets, Net (Excluding Goodwill)	112,919	114,418
Tradename (indefinite life) [Member]
Intangible Assets [Line Items]
Gross amount, Tradename (indefinite life)	25,121	25,108
Intangible Assets, Net (Excluding Goodwill)	25,121	25,108
Customer Relationships [Member]
Intangible Assets [Line Items]
Gross amount	98,329	98,374
Accumulated Amortization	(26,141)	(25,313)
Intangible Assets, Net (Excluding Goodwill)	72,188	73,061
Proven technology and patents [Member]
Intangible Assets [Line Items]
Gross amount	43,191	43,233
Accumulated Amortization	(30,232)	(29,763)
Intangible Assets, Net (Excluding Goodwill)	12,959	13,470
Tradename (finite life) [Member]
Intangible Assets [Line Items]
Gross amount	4,332	4,300
Accumulated Amortization	(1,732)	(1,619)
Intangible Assets, Net (Excluding Goodwill)	2,600	2,681
Other Intangible Assets [Member]
Intangible Assets [Line Items]
Gross amount	758	757
Accumulated Amortization	(707)	(659)
Intangible Assets, Net (Excluding Goodwill)	$ 51	$ 98