Impairment Of Long-Lived Assets And Other Lease Charges (Details) $ in Thousands	3 Months Ended								12 Months Ended
	Jan. 01, 2017 USD ($)	Oct. 02, 2016 USD ($)	Jul. 03, 2016 USD ($)	Apr. 03, 2016 USD ($)	Jan. 03, 2016 USD ($)	Sep. 27, 2015 USD ($)	Jun. 28, 2015 USD ($)	Mar. 29, 2015 USD ($)	Jan. 01, 2017 USD ($)	Jan. 03, 2016 USD ($)	Dec. 28, 2014 USD ($)
Impaired Long-Lived Assets Held and Used [Line Items]
Impairment and other lease charges	$ 1,200	$ 700	$ 300	$ 200	$ 300	$ 400	$ 700	$ 1,600	$ 2,355	$ 3,078	$ 3,541
Impairment charges									1,000	1,500	2,600
Sale Leaseback Transaction, Current Period Loss Recognized									$ 1,200
Sale Leaseback Losses, number of restaurants									7
Other lease charges										$ 1,600	$ 1,000
Asset impairment charges, number of restaurants									4	2	9
Other lease charges, number of restaurants										10	3
Previously Impaired [Member]
Impaired Long-Lived Assets Held and Used [Line Items]
Impairment charges									$ 900	$ 1,300	$ 1,100
Initial Impairments [Member]
Impaired Long-Lived Assets Held and Used [Line Items]
Impairment charges									$ 200	$ 200	$ 1,400