Share-based Compensation (Details 2) (Stock Options, USD $)	3 Months Ended
	Mar. 26, 2013	Mar. 27, 2012
Stock Options
Shares
Outstanding at the beginning of the period (in shares)	2,258,921
Forfeited (in shares)	(9,755)
Exercised (in shares)	(490,744)
Outstanding at the end of the period (in shares)	1,758,422
Exercisable at the end of period (in shares)	1,758,422
Weighted-Average Exercise Price
Outstanding at the beginning of the period (in dollars per share)	$ 13.24
Forfeited (in dollars per share)	$ 14.22
Exercised (in dollars per share)	$ 12.20
Outstanding at the end of the period (in dollars per share)	$ 13.53
Exercisable at the end of the period (in dollars per share)	$ 13.53
Weighted-Average Remaining Contractual Term
Outstanding at the end of the period	2 years 9 months 22 days
Exercisable at the end of the period	2 years 9 months 22 days
Aggregate Intrinsic Value
Outstanding at the end of the period (in dollars)	$ 11,593,000
Exercisable at the end of the period (in dollars)	11,593,000
Intrinsic value of options exercised (in dollars)	3,300,000	3,400,000
Awards vested (in shares)	0
Total grant date fair value of options vested (in dollars)		$ 100,000