Restaurant Impairment, Closure Costs and Asset Disposals Restaurant Impairment, Closure Costs and Asset Disposals (Details) $ in Thousands	3 Months Ended			6 Months Ended
	Jul. 03, 2018 USD ($) restaurant	Jul. 04, 2017 USD ($) restaurant	Apr. 04, 2017 USD ($) restaurant	Jul. 03, 2018 USD ($) restaurant	Jul. 04, 2017 USD ($) restaurant
Property, Plant and Equipment Impairment or Disposal [Abstract]
Restaurant impairments	$ 319	$ 4,037		$ 917	$ 5,973
Closure costs	1,519	(1,471)		2,073	18,415
Loss on disposal of assets and other	(742)	(264)		(1,170)	(496)
Asset Disposals, Closure Costs and Restaurant Impairments	$ 2,580	$ 2,830		$ 4,160	$ 24,884
Number of restaurants impaired during the comparable periods | restaurant	0	9		1	13
Impairment closure costs and other	$ 1,500		$ 2,000	$ 2,100	$ 18,400
Gain recognized related to closures primarily due to adjustments to the liabilities to landlords		$ 3,600
Number of restaurants closed | restaurant	7	21	55	9	55