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Net Income Per Share (Details) (USD $)
 3 Months Ended 9 Months Ended
Sep. 29, 2012
Sep. 24, 2011
Sep. 29, 2012
Sep. 24, 2011
Earnings Per Share, Basic [Abstract]        
Net income, basic $ 50,021,000 $ 42,733,000 $ 196,970,000 $ 152,228,000
Weighted Average Number of Shares Outstanding, Basic 70,741,000 71,226,000 71,383,000 71,988,000
Net income per share - basic (in dollars per share) $ 0.71 $ 0.60 $ 2.76 $ 2.11
Dilutive stock options and restricted stock units outstanding, income 0 0 0 0
Dilutive stock options and restricted stock units outstanding, per share (in shares) 1,572,000 2,117,000 1,715,000 2,170,000
Dilutive stock options and restricted stock units outstanding, per share (in dollars per share) $ (0.02) $ (0.02) $ (0.07) $ (0.06)
Earnings Per Share, Diluted [Abstract]        
Weighted Average Number of Shares Outstanding, Diluted 72,313,000 73,343,000 73,098,000 74,158,000
Net income, dilutive $ 50,021,000 $ 42,733,000 $ 196,970,000 $ 152,228,000
Net income per share - diluted (in dollars per share) $ 0.69 $ 0.58 $ 2.69 $ 2.05
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 400,000 400,000 500,000 500,000