Acquisitions and Divestitures (Details) $ in Thousands		12 Months Ended
	Jan. 25, 2016 USD ($) restaurant	Dec. 27, 2015 USD ($) restaurant	Dec. 28, 2014 USD ($) restaurant	Dec. 29, 2013 USD ($)
Purchase price allocation
Goodwill		$ 79,657	$ 82,007	$ 79,391
Multiple locations of restaurants acquired
Acquisition disclosures
Number of restaurants acquired | restaurant		7	13
Purchase price
Cash payment		$ 922	$ 4,773
Cancellation of accounts and notes receivable			412
Total purchase price		922	5,185
Purchase price allocation
Property and equipment		648	555
Goodwill		152	3,661
Other, including cash		9	125
Total purchase price		922	5,185
Multiple locations of restaurants acquired | Franchise Rights
Purchase price allocation
Reacquired franchise right		$ 113	$ 844
Southeast Franchised Restaurants Acquisition
Acquisition disclosures
Number of restaurants acquired | restaurant	19
Purchase price
Total purchase price	$ 11,000