Stock-Based Employee Compensation (Summary Of Non-Vested Stock Options) (Details)	12 Months Ended
	Dec. 27, 2016 $ / shares shares
Stock-Based Employee Compensation [Abstract]
Non-vested stock options at beginning of period, Shares | shares	506,500
Non-vested stock options, Vested, Shares | shares	(316,250)
Non-vested stock options, Forfeited, Shares | shares	(38,625)
Non-vested stock options at end of period, Shares | shares	151,625
Non-vested stock options at beginning of period, Weighted average grant date fair value | $ / shares	$ 7.25
Non-vested stock options, Vested, Weighted average grant date fair value | $ / shares	6.60
Non-vested stock options, Forfeited, Weighted average grant date fair value | $ / shares	7.92
Non-vested stock options at end of period, Weighted average grant date fair value | $ / shares	$ 8.44