Share-Based Payment Arrangements (Company's Stock Options Granted Under The Plans) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	6 Months Ended
	Jun. 25, 2011
Share-based Payment Arrangements
Options outstanding at December 25, 2010, Number of Options	2,295,831
Options outstanding at December 25, 2010, Weighted Average Exercise Price per Share	$ 39.73
Granted, Number of Options	271,000
Granted, Weighted Average Exercise Price per Share	$ 41.81
Exercised, Number of Options	(94,299)
Exercised, Weighted Average Exercise Price per Share	$ 35.09
Forfeited, Number of Options	(118,700)
Forfeited, Weighted Average Exercise Price per Share	$ 41.59
Options outstanding at June 25, 2011, Number of Options	2,353,832
Options outstanding at June 25, 2011, Weighted Average Exercise Price per Share	$ 40.06
Options outstanding at June 25, 2011, Weighted Average Remaining Contractual Term (years)	6.5
Options outstanding at June 25, 2011, Aggregate Intrinsic Value	$ 11,602
Options exercisable at June 25, 2011, Number of Options	1,117,599
Options exercisable at June 25, 2011, Weighted Average Exercise Price per Share	$ 39.61
Options exercisable at June 25, 2011 , Weighted Average Remaining Contractual Term (years)	5.2
Options exercisable at June 25, 2011, Aggregate Intrinsic Value	$ 6,012