Basis of Presentation Basis of Presentation Schedule of Prior Period Adjustments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Oct. 01, 2017	Sep. 30, 2018	Oct. 01, 2017
Prior Period Adjustments Restatement
Cost of sales	$ 139,348	$ 133,631	$ 409,721	$ 388,755
Franchise support and other costs	5,349	3,690	18,553	11,122
General and administrative	46,545	51,716	146,064	153,089
Other operating income, net	$ (1,713)	(2,021)	$ (4,643)	(5,828)
Total of income statement line items affected by prior period reclassifications		187,016		547,138
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		132,387		385,154
Franchise support and other costs		0		0
General and administrative		52,960		156,690
Other operating income, net		1,669		5,294
Total of income statement line items affected by prior period reclassifications		187,016		547,138
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		1,244		3,601
Franchise support and other costs
Prior Period Adjustments Restatement
Prior period reclassifications to Franchise support and other costs		3,690		11,122
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		0
Prior period reclassifications for Restaurant operational costs		(1,244)		(3,601)
Other operating expense (income), net
Prior Period Adjustments Restatement
Prior period reclassifications to Franchise support and other costs		(3,690)		(11,122)
Prior period reclassifications for Restaurant operational costs		$ 0		$ 0