Basis Of Presentation And Recently Issued Accounting Guidance (Details) (USD $) In Millions, except Per Share data	3 Months Ended		9 Months Ended
	Oct. 02, 2011	Oct. 03, 2010	Oct. 02, 2011	Oct. 03, 2010
Basis Of Presentation And Recently Issued Accounting Guidance [Line Items]
Contributions from franchisees to advertising and media funds	$ 0.5	$ 0.5	$ 1.7	$ 1.7
Change in depreciation and amortization expense	1.1		1.1
Change in depreciation and amortization expense year one			6.0
Change in depreciation and amortization expense year two			3.7
Change in depreciation and amortization expense year three			1.6
Change in accounting principle, impact on other store operating costs	0.4		0.4
Change in accounting principle, impact on fully diluted earnings per share	$ 0.02		$ 0.02
Maximum [Member]
Basis Of Presentation And Recently Issued Accounting Guidance [Line Items]
Change in accounting principle, impact on other store operating costs			1.6
Maximum [Member] | Leasehold Improvements [Member]
Basis Of Presentation And Recently Issued Accounting Guidance [Line Items]
Estimated useful lives, years	20
Maximum [Member] | Games [Member]
Basis Of Presentation And Recently Issued Accounting Guidance [Line Items]
Estimated useful lives, years	10
Maximum [Member] | Leasehold Improvements Related To Major Remodels [Member]
Basis Of Presentation And Recently Issued Accounting Guidance [Line Items]
Estimated useful lives, years	15
Minimum [Member]
Basis Of Presentation And Recently Issued Accounting Guidance [Line Items]
Change in accounting principle, impact on other store operating costs			1.4
Minimum [Member] | Leasehold Improvements [Member]
Basis Of Presentation And Recently Issued Accounting Guidance [Line Items]
Estimated useful lives, years	15
Minimum [Member] | Games [Member]
Basis Of Presentation And Recently Issued Accounting Guidance [Line Items]
Estimated useful lives, years	eight
Minimum [Member] | Leasehold Improvements Related To Major Remodels [Member]
Basis Of Presentation And Recently Issued Accounting Guidance [Line Items]
Estimated useful lives, years	10
Games [Member]
Basis Of Presentation And Recently Issued Accounting Guidance [Line Items]
Estimated useful lives, years	six
Fourth Quarter 2011 [Member]
Basis Of Presentation And Recently Issued Accounting Guidance [Line Items]
Change in depreciation and amortization expense			$ 1.8