Acquisition (Details) (USD $) In Millions, unless otherwise specified	May 30, 2012 Rate
Business Acquisition [Line Items]
Number of Restaurants Acquired	278
Business Acquisition, Equity Interest Issued or Issable, Ownership Percentage	28.90%
Number of States for Right of First Refusal	20
Loan, Payment Period	5 years
Restaurants to be remodeled	455
Cash paid for cash and inventory [Member]
Business Acquisition [Line Items]
Business Acquisition, Cost of Acquired Entity, Purchase Price	$ 3.8
Other cash payments paid at closing [Member]
Business Acquisition [Line Items]
Business Acquisition, Cost of Acquired Entity, Purchase Price	9.4
Other cash payments [Member]
Business Acquisition [Line Items]
Business Acquisition, Cost of Acquired Entity, Purchase Price	$ 3.6
LeasedRestaurants [Member]
Business Acquisition [Line Items]
Number of Restaurants Acquired	81
Restaurants on sub-lease [Member]
Business Acquisition [Line Items]
Number of Restaurants Acquired	197