Restaurant Impairment, Closure Costs and Asset Disposals Restaurant Impairment, Closure Costs and Asset Disposals (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 04, 2017 USD ($) restaurant	Jun. 28, 2016 USD ($) restaurant	Jul. 04, 2017 USD ($) restaurant	Jun. 28, 2016 USD ($) restaurant
Property, Plant and Equipment Impairment or Disposal [Abstract]
Restaurant impairments	$ 4,037	$ 10,346	$ 5,973	$ 10,541
Closure costs	(1,471)	538	18,415	1,087
Loss on disposal of assets and other	264	364	496	636
Asset Disposals, Closure Costs and Restaurant Impairments	$ 2,830	$ 11,248	$ 24,884	$ 12,264
Number of restaurants impaired during the comparable periods | restaurant	9	11	13	12
Gain related to closures due to adjustments to liabilities to landlords	$ 3,600
Number of restaurant leases terminated with landlords | restaurant	21
Number of restaurants closed | restaurant	55
Impairment closure costs and other	$ 2,000	$ 500	$ 18,400	$ 1,100