Property and Equipment (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 29, 2013	Dec. 30, 2012	Jan. 01, 2012
Property and equipment [Line Items]
Land	$ 4,879	$ 3,639
Owned buildings	7,545	6,997
Leasehold improvements	149,268	125,551
Equipment	162,854	154,678
Assets subject to capital leases	16,121	16,085
Propert and equipment, gross	340,667	306,950
Less accumulated depreciation and amortization	(188,492)	(171,024)
Property and equipment, net	152,175	135,926
Capital leases, accumulated depreciation	7,346	6,102
Depreciation expense	33,594	26,321	16,058
Property and Equipment [Member]
Property and equipment [Line Items]
Depreciation expense	$ 28,364	$ 21,632	$ 12,255