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Shareholders' Equity Shareholders' Equity Ordinary Shares Activity (Details)	9 Months Ended
	Sep. 28, 2012	Sep. 30, 2011
Class of Stock [Line Items]
Stock option exercises	312,225	1,148,105
Restricted share grants	27,573	27,853

Total number of shares issued during the period, including shares forfeited, as a result of Restricted Stock Awards.

Number of share options (or share units) exercised during the current period.