Guarantees and Other Commitments and Contingencies Loan Guarantees (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 30, 2012
Franchisee Loan Guarantees [Line Items]
Proceeds from Collection of Notes Receivable	$ 3,000
Guarantor Obligations, Current Carrying Value	220
Franchisees [Member]
Franchisee Loan Guarantees [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	2,000
New store development and equipment financing [Member]
Franchisee Loan Guarantees [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	11,003
Other Liabilities [Member] | New store development and equipment financing [Member]
Franchisee Loan Guarantees [Line Items]
Guarantor Obligations, Current Carrying Value	$ 720