Business and Summary of Significant Accounting Policies (Property & Equipment) (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 03, 2017	Dec. 29, 2015	Dec. 30, 2014
Property, Plant and Equipment [Line Items]
Depreciation and amortization	$ 28,134	$ 27,802	$ 24,787
Internal payroll costs capitalized	2,400	3,000	2,900
Interest costs capitalized	$ 300	$ 400	$ 400
Leasehold Improvements | Maximum
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	20 years
Furniture and Fixtures | Maximum
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	15 years
Furniture and Fixtures | Minimum
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	3 years
Equipment | Maximum
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	7 years
Equipment | Minimum
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	3 years