Acquisition (Details) (USD $) In Thousands, except Share data, 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%
Business Acquisition, Cost of Acquired Entity, Purchase Price	$ 74,537
Number of States for Right of First Refusal	20
Loan, Payment Period	5 years
Restaurants to be remodeled	455
Business Acquisition, Cost of Acquired Entity, Equity Interests Issued and Issuable	57,711
Business Acquisition, Cost of Acquired Entity, Cash Paid	12,135
Business Acquisition, Consideration Unpaid at Closing	(4,274)
Convertible Preferred Stock, Common Shares Issuable upon Conversion	9,414,580
Sale of Stock, Price Per Share	$ 6.13
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
Cash paid for cash and inventory [Member]
Business Acquisition [Line Items]
Business Acquisition, Cost of Acquired Entity, Purchase Price	3,800
Other cash payments [Member]
Business Acquisition [Line Items]
Business Acquisition, Cost of Acquired Entity, Purchase Price	3,600
Other cash payments paid at closing [Member]
Business Acquisition [Line Items]
Business Acquisition, Cost of Acquired Entity, Purchase Price	9,400
ROFR Payment Paid at Closing [Member]
Business Acquisition [Line Items]
Business Acquisition, Cost of Acquired Entity, Purchase Price	200
Business Acquisition, Cost of Acquired Entity, Purchase Price, Cash [Member]
Business Acquisition [Line Items]
Business Acquisition, Cost of Acquired Entity, Cash Paid	16,826
Business Acquisition, Cost of Acquired Entity, Purchase Price, Cost of Inventory [Member]
Business Acquisition [Line Items]
Business Acquisition, Purchase Price Allocation, Current Assets, Cash and Cash Equivalents	$ (417)