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Favorable and Unfavorable Leases (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
May 30, 2012
Mar. 31, 2013
Leases, Acquired-in-Place, Market Adjustment [Member]
Acquired Finite-Lived Intangible Assets [Line Items]    
Number of Restaurants Acquired 278  
Amortization of Intangible Assets   $ 139
Amortization Expense, All of 2013   557
2014   546
2015   528
2016   449
2017   439
2018   $ 410