Share-based Compensation (Details 2) (Stock Options, USD $)	3 Months Ended		9 Months Ended
	Sep. 25, 2012	Sep. 27, 2011	Sep. 25, 2012	Sep. 27, 2011
Stock Options
Shares
Outstanding at the beginning of the period (in shares)			3,486,642
Forfeited (in shares)			(106,069)
Exercised (in shares)			(1,061,900)
Outstanding at the end of the period (in shares)	2,318,673		2,318,673
Exercisable at the end of period (in shares)	2,316,858		2,316,858
Weighted-Average Exercise Price
Outstanding at the beginning of the period (in dollars per share)			$ 12.02
Forfeited (in dollars per share)			$ 11.44
Exercised (in dollars per share)			$ 9.66
Outstanding at the end of the period (in dollars per share)	$ 13.12		$ 13.12
Exercisable at the end of the period (in dollars per share)	$ 13.12		$ 13.12
Weighted-Average Remaining Contractual Term
Outstanding at the end of the period			3 years 2 months 16 days
Exercisable at the end of the period			3 years 2 months 12 days
Aggregate Intrinsic Value
Outstanding at the end of the period (in dollars)	$ 9,734,000		$ 9,734,000
Exercisable at the end of the period (in dollars)	9,724,000		9,724,000
Intrinsic value of options exercised (in dollars)	1,600,000	400,000	8,200,000	2,600,000
Total grant date fair value of options vested (in dollars)		$ 100,000	$ 100,000	$ 500,000