Fair Value (Details Textual) (USD $)	3 Months Ended	9 Months Ended		9 Months Ended	12 Months Ended	9 Months Ended		12 Months Ended	9 Months Ended
	Sep. 29, 2012 Sigrity [Member]	Sep. 29, 2012 Sigrity [Member]	Jul. 02, 2012 Sigrity [Member]	Sep. 29, 2012 Minimum [Member]	Dec. 31, 2011 Minimum [Member]	Sep. 29, 2012 Minimum [Member] Sigrity [Member]	Sep. 29, 2012 Maximum [Member]	Dec. 31, 2011 Maximum [Member]	Sep. 29, 2012 Maximum [Member] Sigrity [Member]
Fair Value of Financial Instrument (Textual) [Abstract]
Acquired Intangible Assets, Amount	$ 40,600,000
Fair Value Inputs, Discount Rate		3.00%		11.00%	11.00%	11.00%	16.00%	16.00%	12.00%
Acquired deferred revenue liability			$ 3,800,000
Fair Value Inputs, Estimated Profit Rate		25.00%