System Optimization Gains, Net Summary of Disposition Activity (Details) $ in Thousands	1 Months Ended	3 Months Ended		6 Months Ended		12 Months Ended
	Aug. 10, 2016 USD ($) Restaurant	Jul. 03, 2016 USD ($) Restaurant	Jun. 28, 2015 USD ($) Restaurant	Jul. 03, 2016 USD ($) Restaurant	Jun. 28, 2015 USD ($) Restaurant	Jan. 03, 2016 Restaurant	Dec. 28, 2014 Restaurant	Dec. 29, 2013 Restaurant	Feb. 28, 2015 Restaurant
Property, Plant and Equipment [Line Items]
Significant Changes, Planned Franchises to Sell | Restaurant		258		258					540
Future company-owned restaurant ownership percentage									5.00%
Gain on Sale of Restaurants [Abstract]
Proceeds from sale				$ 45,078	$ 38,697
System optimization gains, net		$ 1,924	$ 15,654	$ 10,350	$ 14,849
Sale of Company-Owned Restaurants to Franchisees [Member]
Property, Plant and Equipment [Line Items]
Number of restaurants sold to franchisees | Restaurant		0	83	55	100	327	255	244
Gain on Sale of Restaurants [Abstract]
Proceeds from sale		$ 0	$ 31,468	$ 39,615	$ 36,049
Net assets sold		0	(15,158)	(17,055)	(17,380)
Goodwill related to sales of restaurants		0	(6,840)	(6,376)	(7,863)
Net favorable (unfavorable) leases		0	7,923	(4,906)	7,395
Other		0	(2,822)	(795)	(3,224)
Gain on sales of restaurants, net, before post-closing adjustments		0	14,571	10,483	14,977
Post-closing adjustments on sales of restaurants		545	934	(1,590)	(639)
System optimization gains, net		545	15,505	8,893	14,338
Favorable Lease Assets			23,428	183	25,807
Unfavorable Lease Liabilities			15,505	$ 5,089	18,412
Deferred Gain on Sale of Property			$ 2,387		$ 2,387
Franchises Sold, Deferred Gain on Sale | Restaurant			14		14
Recognition of Note Receivable on Sale of Property			$ 1,801		$ 1,801
Franchises Sold, Recognition of Note Receivable | Restaurant			16		16
Recognition of Gain on Sale of Property			$ 2,450
Sale of franchise-operated restaurant to franchisee [Member]
Property, Plant and Equipment [Line Items]
Number of restaurants sold to franchisees | Restaurant				126
Sale of Other Assets [Member]
Gain on Sale of Restaurants [Abstract]
Proceeds from sale		3,893	905	$ 5,463	$ 2,598
System optimization gains, net		$ 1,379	$ 149	$ 1,457	$ 511
Subsequent Event [Member] | Sale of Company-Owned Restaurants to Franchisees [Member]
Property, Plant and Equipment [Line Items]
Number of restaurants sold to franchisees | Restaurant	82
Gain on Sale of Restaurants [Abstract]
Proceeds from sale	$ 66,300