Share-based Compensation (Details 2) (Stock Options, USD $)	3 Months Ended		9 Months Ended
	Sep. 27, 2011 Year	Sep. 28, 2010	Sep. 27, 2011 Year	Sep. 28, 2010
Stock Options
Shares
Outstanding at the beginning of the period (in shares)			3,996,512
Forfeited (in shares)			(17,714)
Exercised (in shares)			(412,502)
Outstanding at the end of the period (in shares)	3,566,296		3,566,296
Exercisable at the end of period (in shares)	3,510,267		3,510,267
Weighted-Average Exercise Price
Outstanding at the beginning of the period (in dollars per share)			$ 11.87
Forfeited (in dollars per share)	$ 15.50		$ 15.50
Exercised (in dollars per share)	$ 10.89		$ 10.89
Outstanding at the end of the period (in dollars per share)	$ 11.96		$ 11.96
Exercisable at the end of the period (in dollars per share)	$ 11.94		$ 11.94
Weighted-Average Remaining Contractual Term
Outstanding at the end of the period (in years)	3.89		3.89
Exercisable at the end of the period (in years)			3.85
Aggregate Intrinsic Value
Outstanding at the end of the period (in dollars)	$ 9,896,000		$ 9,896,000
Exercisable at the end of the period (in dollars)	9,828,000		9,828,000
Intrinsic value of options exercised (in dollars)	400,000	600,000	2,600,000	7,200,000
Total grant date fair value of options vested (in dollars)	$ 100,000	$ 100,000	$ 500,000	$ 1,100,000