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Business Tax Credit Carryforward [Member] Franchise-owned restaurants Franchised Units [Member] Payables and Accruals [Abstract] Blended federal and state statutory rate Effective Income Tax Rate Reconciliation, at Federal Statutory And State And Local Income Tax Rate, Percent Effective Income Tax Rate Reconciliation, at Federal Statutory And State And Local Income Tax Rate, Percent Pre-opening expenses Pre-Opening Costs Loss (Gain) on restaurant closures/relocations Gain (Loss) on Disposition of Property Plant Equipment Remeasurements of finance leased assets and lease liabilities Remeasurements Of Finance Lease Assets And Lease Liabilities Remeasurements Of Finance Lease Assets And Lease Liabilities Cash and cash equivalents and restricted cash, beginning of period Cash and cash equivalents and restricted cash, end of period Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Current portion of long-term debt Portion of Long-term Debt, Current Tax Credit 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