Supplemental Financial Information (Property and Equipment) (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 30, 2014
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 348,625	$ 334,900
Accumulated depreciation and amortization	(139,845)	(129,327)
Property and equipment, net	208,780	205,573
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	217,493	208,678
Furniture, Fixtures, and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	119,478	114,148
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 11,654	$ 12,074