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Legal Proceedings (Details Textual) (USD $)
3 Months Ended 0 Months Ended 3 Months Ended 3 Months Ended
Mar. 31, 2013
Mar. 30, 2014
Dec. 29, 2013
Jul. 02, 2013
Syntrix [Member]
Mar. 31, 2013
Syntrix [Member]
Mar. 30, 2014
Syntrix [Member]
Mar. 30, 2014
Syntrix [Member]
Cost of Sales [Member]
Mar. 31, 2013
Syntrix [Member]
Operating Expense [Member]
Loss Contingencies [Line Items]                
Legal contingencies, damages awarded       $ 115,100,000        
Loss contingency, damages awarded, royalty rate       8.00%        
Long-term legal contingencies   138,780,000 132,933,000          
Legal contingencies 105,853,000       106,900,000   5,800,000 105,900,000
Restricted Cash and Cash Equivalents, Noncurrent           $ 17,800,000