Goodwill and Other Intangible Assets (Intangible Assets Subject to Amortization) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 27, 2016	Dec. 29, 2015	Dec. 30, 2014
Amortizable intangible assets
Gross Carrying Amount	$ 702,564	$ 685,570
Accumulated Amortization	(83,144)	(64,522)
Net Book Value	619,420	621,048
Amortization expense on intangible assets	18,600	17,900	$ 17,300
Franchise rights
Amortizable intangible assets
Gross Carrying Amount	706,265	688,825
Accumulated Amortization	(87,944)	(68,307)
Net Book Value	618,321	620,518
Favorable leasehold interests
Amortizable intangible assets
Gross Carrying Amount	13,172	13,850
Accumulated Amortization	(5,030)	(4,354)
Net Book Value	8,142	9,496
Unfavorable leasehold interests
Amortizable intangible assets
Gross Carrying Amount	(16,873)	(17,105)
Accumulated Amortization	9,830	8,139
Net Book Value	$ (7,043)	$ (8,966)