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Equity-Based Compensation (Weighted-Average Assumptions Used for Grants of Stock Options and Sars) (Detail) (USD $)
9 Months Ended
Sep. 29, 2012
Oct. 01, 2011
Expected dividend yield 0.00% 0.00%
Forfeiture rate 10.21% 11.50%
Volatility 35.90% 35.33%
Risk free interest rate 0.94% 2.01%
Risk free interest rate - range of interest rates, minimum 0.07% 0.01%
Risk free interest rate - range of interest rates, maximum 1.95% 3.18%
Expected weighted-average life, in years 5 years 5 months 23 days 5 years 5 months 1 day
Fair value of options and SARs granted $ 5,507,000 $ 5,495,000
Weighted-average grant date fair value of options and SARs granted $ 12.84 $ 14.29