Stock-Based Employee Compensation (Summary Of Stock Option Activity) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	6 Months Ended
	Jun. 17, 2014
Stock-Based Employee Compensation [Abstract]
Outstanding at beginning of year, Shares	1,492,775
Granted, Shares	24,000
Exercised, Shares	(18,125)
Forfeited, Shares	(16,750)
Outstanding at end of period, Shares	1,481,900
Options exercisable at end of period, Shares	161,275
Outstanding at beginning of year, Weighted average exercise price	$ 17.01
Granted, Weighted average exercise price	$ 27.06
Exercised, Weighted average exercise price	$ 13.74
Forfeited, Weighted average exercise price	$ 20.45
Outstanding at end of period, Weighted average exercise price	$ 17.18
Options exercisable at end of period, Weighted average exercise price	$ 13.33
Outstanding at end of period, Weighted average Remaining Contractual Term	8 years 7 months 6 days
Options exercisable at end of period, Weighted average Remaining Contractual Term	8 years 2 months 12 days
Outstanding at end of period, Aggregate Intrinsic Value	$ 13,447
Options exercisable at end of period, Aggregate Intrinsic Value	$ 2,083