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Stockholders' Equity And Benefit Plans (Schedule Of Restricted Stock And Restricted Stock Unit Activity) (Details) (USD $)
Share data in Thousands, except Per Share data, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Jan. 01, 2011
Jan. 02, 2010
Stockholders' Equity And Benefit Plans [Abstract]      
Nonvested, Beginning balance, Number of Shares 430 493 495
Granted, Number of Shares 105 215 150
Vested, Number of Shares (172) (150) (142)
Forfeited, Number of Shares (11) (128) (10)
Nonvested, Ending balance, Number of Shares 352 430 493
Expected to vest, Number of Shares 317    
Nonvested, beginning of period, Weighted-Average Grant-Date Fair Value $ 29.03 $ 21.54 $ 24.56
Granted, Weighted-Average Grant-Date Fair Value $ 86.80 $ 38.83 $ 13.65
Vested, Weighted-Average Grant-Date Fair Value $ 29.29 $ 21.66 $ 23.48
Forfeited, Weighted-Average Grant-Date Fair Value $ 42.98 $ 25.35 $ 25.02
Nonvested, end of period, Weighted-Average Grant-Date Fair Value $ 45.70 $ 29.03 $ 21.54
Expected to vest, Weighted-Average Grant-Date Fair Value $ 45.70