Loss on Asset Disposals and Impairment (Details) - Underperforming Restaurants $ in Thousands	12 Months Ended
	Dec. 25, 2016 USD ($) restaurant	Dec. 27, 2015 USD ($) restaurant	Dec. 28, 2014 USD ($) restaurant
Note 13 - Loss on Asset Disposals and Impairment (Details) [Line Items]
Number of restaurants | restaurant	3	3	3
Impairment of long-lived assets held for use | $	$ 2,830	$ 1,458	$ 1,661