Summary of Significant Accounting Policies Reclassifications (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 30, 2018	Sep. 30, 2018	Jul. 01, 2018	Apr. 01, 2018	Dec. 31, 2017	Oct. 01, 2017	Jul. 02, 2017	Apr. 02, 2017	Dec. 30, 2018	Dec. 31, 2017	Jan. 01, 2017
Prior Period Adjustments Restatement
Cost of sales	$ 138,867	$ 139,348	$ 138,154	$ 132,219	$ 129,180	$ 133,631	$ 130,581	$ 124,543	$ 548,588	$ 517,935	$ 752,079
Franchise support and other costs									25,203	16,325	6,885
General and administrative									217,489	203,593	236,786
Other operating expense (income), net									$ (6,387)	(8,652)	(19,969)
Total of income statement line items affected by prior period reclassifications										729,201	975,781
Prior period reclassifications to Franchise support and other costs										0	0
Prior period reclassifications for Restaurant operational costs										0	0
Previously Reported
Prior Period Adjustments Restatement
Cost of sales										512,947	744,701
Franchise support and other costs										0	0
General and administrative										208,581	245,869
Other operating expense (income), net										7,673	(14,789)
Total of income statement line items affected by prior period reclassifications										729,201	975,781
Cost of sales
Prior Period Adjustments Restatement
Prior period reclassifications to Franchise support and other costs										0	0
Prior period reclassifications for Restaurant operational costs										4,988	7,378
Franchise support and other costs
Prior Period Adjustments Restatement
Prior period reclassifications to Franchise support and other costs										16,325	6,885
Prior period reclassifications for Restaurant operational costs										0	0
General and administrative
Prior Period Adjustments Restatement
Prior period reclassifications to Franchise support and other costs										0	(1,705)
Prior period reclassifications for Restaurant operational costs										(4,988)	(7,378)
Other operating expense (income), net
Prior Period Adjustments Restatement
Prior period reclassifications to Franchise support and other costs										(16,325)	(5,180)
Prior period reclassifications for Restaurant operational costs										$ 0	$ 0