Impairment Of Long-Lived Assets And Other Lease Charges (Details) $ in Thousands	3 Months Ended		12 Months Ended
	Apr. 03, 2016 USD ($)	Mar. 29, 2015 USD ($)	Jan. 03, 2016 USD ($)
Impaired Long-Lived Assets Held and Used [Line Items]
Impairment Charges	$ 200	$ 500
Previously Impaired [Member]
Impaired Long-Lived Assets Held and Used [Line Items]
Impairment Charges		300
Provisions for closures [Member]
Impaired Long-Lived Assets Held and Used [Line Items]
Other lease charges	$ 0	$ 1,200	$ 1,472
Closed Restaurants [Member]
Impaired Long-Lived Assets Held and Used [Line Items]
Other Lease Charges, Number of Restaurants		8