Supplemental Financial Information (Property and Equipment) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 30, 2014	Dec. 31, 2013
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 334,900	$ 273,857
Accumulated depreciation and amortization	(129,327)	(106,243)
Property and equipment, net	205,573	167,614
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	208,678	169,953
Furniture, Fixtures, and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	114,148	92,695
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 12,074	$ 11,209