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Earnings Per Share (Potentially Dilutive Securities Excluded From Earnings Per Share Calculation) (Details)
3 Months Ended 6 Months Ended
Jul. 02, 2011
Jul. 03, 2010
Jul. 02, 2011
Jul. 03, 2010
Earnings Per Share        
Potentially dilutive shares 1,436,000 1,928,000 1,437,000 1,908,000