System Optimization (Gains) Losses, Net Gains (Losses), Net (Details) $ in Thousands	3 Months Ended		12 Months Ended
	Apr. 03, 2016 USD ($) Restaurant	Mar. 29, 2015 USD ($) 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	260					540
Future company-owned restaurant ownership percentage						5.00%
Gain on Sale of Restaurants [Abstract]
Proceeds from sale	$ 41,185	$ 6,283
Gain (loss) on sales	$ 8,426	$ (805)
Sale of Company-Owned Restaurants to Franchisees [Member]
Property, Plant and Equipment [Line Items]
Number of restaurants sold to franchisees | Restaurant	55	17	327	255	244
Gain on Sale of Restaurants [Abstract]
Proceeds from sale	$ 39,615	$ 4,581
Net assets sold	(17,055)	(2,222)
Goodwill related to sales of restaurants	(6,376)	(1,023)
Net unfavorable leases	(4,906)	(528)
Other	(795)	(402)
Gain on sales of restaurants, net, before post-closing adjustments	10,483	406
Post-closing adjustments on sales of restaurants	(2,135)	(1,573)
Gain (loss) on sales	8,348	(1,167)
Favorable Lease Assets	183	2,379
Unfavorable Lease Liabilities	$ 5,089	2,907
Sale of franchise-operated restaurant to franchisee [Member]
Property, Plant and Equipment [Line Items]
Number of restaurants sold to franchisees | Restaurant	113
Sale of Other Assets [Member]
Gain on Sale of Restaurants [Abstract]
Proceeds from sale	$ 1,570	1,693
Gain (loss) on sales	$ 78	$ 362