Stock-Based Employee Compensation (Summary Of Stock Option Activity) (Details) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 27, 2016 USD ($) $ / shares shares
Stock-Based Employee Compensation [Abstract]
Outstanding at beginning of period, Shares | shares	1,221,100
Exercised, Shares | shares	(228,800)
Forfeited, Shares | shares	(64,625)
Outstanding at end of period, Shares | shares	927,675
Options exercisable at end of period, Shares | shares	776,050
Outstanding at beginning of period, Weighted average exercise price | $ / shares	$ 17.44
Exercised, Weighted average exercise price | $ / shares	13.00
Forfeited, Weighted average exercise price | $ / shares	20.50
Outstanding at end of period, Weighted average exercise price | $ / shares	18.33
Options exercisable at end of period, Weighted average exercise price | $ / shares	$ 17.76
Outstanding at end of period, Weighted average Remaining Contractual Term	6 years 2 months 12 days
Options exercisable at end of period, Weighted average Remaining Contractual Term	6 years 1 month 6 days
Outstanding at end of period, Aggregate Intrinsic Value | $	$ 1,455
Options exercisable at end of period, Aggregate Intrinsic Value | $	$ 1,448