Acquisition (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Sep. 29, 2013	May 30, 2012 Rate
Business Acquisition [Line Items]
Number of Restaurants		564
Business Acquisition, Equity Interest Issued or Issable, Ownership Percentage			28.90%
Business Combination, Consideration Transferred, Cash and Inventory	$ 3.8
Business Combination, Consideration Transferred, Other	9.4
Business Combination, Consideration Transferred, Liabilities Incurred	$ 3.6
Number of States in which Entity Operates		13
Loan, Payment Period			5 years
Restaurants to be remodeled			455
Number of Restaurants Acquired [Member]
Business Acquisition [Line Items]
Number of Restaurants			278
Leases, Number of Leased Restaurant Properties			81
Leases, Terms Identical to BKC's Terms with Third-Party Lessor [Member]
Business Acquisition [Line Items]
Leases, Number of Leased Restaurant Properties			197
Right of First Refusal Liability [Member]
Business Acquisition [Line Items]
Number of States in which Entity Operates			20