Impairment Of Long-Lived Assets And Other Lease Charges Closed Restaurant Reserve Activity (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jul. 02, 2017	Jan. 01, 2017
Restructuring Reserve [Roll Forward]
Closed-restaurant reserve, beginning of the period	$ 1,513	$ 2,088
Provisions for restaurant closures	179	59
Changes in estimates of accrued costs	118	(89)
Payments, net	(387)	(691)
Other adjustments, including the effect of discounting future obligations	382	146
Closed-restaurant reserve, end of the period	$ 1,805	$ 1,513