Stock-Based Employee Compensation (Stock Option Compensation Cost) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 30, 2014	Dec. 31, 2013	Dec. 25, 2012
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock compensation cost	$ 2,567	$ 1,689	$ 378
Restaurant Operating Expenses [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock compensation cost	442	332	74
General And Administrative Cost [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock compensation cost	$ 2,125	$ 1,357	$ 304