Stock-Based Compensation (Schedule Of Stock Option Plans Activity) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	9 Months Ended
	Oct. 01, 2011
Exercised, aggregate intrinsic value	$ 7,237
Exercisable, aggregate intrinsic value	742
Outstanding, aggregate intrinsic value	$ 742
Shares [Member]
Outstanding at beginning of year, shares	983
Granted, shares	560
Exercised, shares	(349)
Canceled, shares
Outstanding at end of year, shares	1,194
Options exercisable at end of year, shares	392
Weighted-Average Exercise Price [Member]
Outstanding, weighted-average exercise price beginning of year	$ 29.14
Granted, weighted-average exercise price	$ 42.34
Exercised, weighted-average exercise price	$ 19.94
Canceled, weighted-average exercise price
Outstanding, weighted-average exercise price, end of year	$ 38.02
Options exercisable, weighted-average exercise price	$ 29.75
Weighted-Average Remaining Contractual Life [Member]
Outstanding, weighted-average remaining contractual life, in years	6.5
Options exercisable, weighted-average remaining contractual life, in years	0.7