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Stockholders' Equity (Details 5) (Performance Shares [Member], USD $)
1 Months Ended 6 Months Ended
Mar. 01, 2011
Mar. 03, 2010
Jul. 02, 2011
Performance Shares [Member]
     
Performance share activity      
Unvested as of January 1, 2011 75,750   75,750
Performance Shares, Granted 80,050 75,750 80,050
Performance Shares, Vested      
Performance Shares, Forfeited     (1,300)
Unvested as of July 2, 2011     154,500
Weighted Average Grant Date Fair Value, Unvested as of January 1, 2011 $ 43.28   $ 43.28
Weighted Average Grant Date Fair Value, Granted     $ 55.57
Weighted Average Grant Date Fair Value, Vested      
Weighted Average Grant Date Fair Value, Forfeited     $ 43.28
Weighted Average Grant Date Fair Value, Unvested as of July 2, 2011     $ 49.65