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Variable Interest Entities (Details) (USD $)
 0 Months Ended 6 Months Ended 1 Months Ended
Mar. 14, 2012
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Roy's joint venture [Member]
Variable interest entity, primary beneficiary [Member]
Dec. 31, 2011
Roy's joint venture [Member]
Variable interest entity, primary beneficiary [Member]
Jun. 30, 2012
RY-8, Inc. [Member]
Variable interest entity, primary beneficiary [Member]
Sep. 30, 2009
Paradise Restaurant Group, LLC [Member]
Variable interest entity, not primary beneficiary [Member]
Restaurants
Jun. 30, 2012
Paradise Restaurant Group, LLC [Member]
Variable interest entity, not primary beneficiary [Member]
Variable Interest Entity [Line Items]                
Carrying amount of consolidated assets for joint venture       $ 24,300,000 $ 26,200,000      
Carrying amount of consolidated liabilities for joint venture       10,600,000 9,600,000      
Extended line of credit           24,500,000    
Guaranteed debt           24,500,000    
Number of restaurants sold to variable interest entity             34  
Proceeds from sale of property, fixtures and equipment 192,900,000 1,255,000 688,000       2,000,000  
Variable interest entity, note receivable, face amount             2,000,000  
Variable interest entity, note receivable, reserve               2,000,000
Maximum exposure to loss due to Company's involvment with variable interest entities               $ 17,800,000