Leases (Net Rental Expense) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 30, 2015	Dec. 31, 2014	Dec. 25, 2013
Rental Expense:
Base rents	$ 30,749	$ 33,402	$ 35,667
Contingent rents	6,031	5,535	5,412
Total rental expense	36,780	38,937	41,079
Rental income:
Base rents	30,166	33,926	36,183
Contingent rents	5,305	4,608	4,389
Total rental income	$ 35,471	$ 38,534	$ 40,572