Restaurant Impairment, Closure Costs and Asset Disposals Restaurant Impairment, Closure Costs and Asset Disposals (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 27, 2016 USD ($)	Sep. 29, 2015 USD ($)	Sep. 27, 2016 USD ($) restaurant	Sep. 29, 2015 USD ($) restaurant
Property, Plant and Equipment Impairment or Disposal [Abstract]
Restaurant impairments	$ 79	$ 16,213	$ 10,620	$ 22,157
Costs related to closure of restaurants	642	16	1,729	52
Loss on disposal of assets and other	1,562	250	2,198	606
Asset Disposals, Closure Costs and Restaurant Impairments	$ 2,283	$ 16,479	14,547	22,815
Cost of capitalized labor and overhead			1,100
Gain on insurance proceeds received for property damage			$ (416)	$ 0
Number of restaurants impaired during the comparable periods | restaurant			12	33