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Shareholders' Equity Shareholders' Equity Ordinary Shares Activity (Details)
3 Months Ended
Mar. 28, 2014
Mar. 29, 2013
Shareholders' Equity [Abstract]    
Stock option exercises 117,034 589,018
Restricted stock grants 26,117 26,201
Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures 61,606 0
Ordinary shares repurchase and retirement (764,600) (1,038,209)