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Net Income Per Share (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
 12 Months Ended
Dec. 29, 2012
Dec. 31, 2011
Dec. 25, 2010
Basic net income per share [Abstract]      
Net income, basic $ 276,457 $ 222,740 $ 167,972
Shares, basic 71,092,000 71,777,000 72,597,000
Per share amount, basic (in dollars per share) $ 3.89 $ 3.10 $ 2.31
Dilutive stock options and restricted stock units outstanding, income $ 0 $ 0 $ 0
Dilutive stock options and restricted stock units outstanding, shares 1,665,000 2,144,000 2,089,000
Dilutive stock options and restricted stock units outstanding, per share (in dollars per share) $ (0.09) $ (0.09) $ (0.06)
Diluted net income per share [Abstract]      
Shares, diluted 72,757,000 73,921,000 74,686,000
Diluted net income per share (in dollars per share) $ 3.80 $ 3.01 $ 2.25
Anitdilutive securities excluded from computation of earnings per share 495,799 321,080 521,941