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Commitments and Contingencies (Details)
$ in Millions
Jul. 24, 2018
item
Jul. 07, 2018
item
Jun. 07, 2018
USD ($)
May 25, 2018
item
Apr. 16, 2018
Mar. 27, 2018
item
Feb. 28, 2017
item
Feb. 03, 2017
item
Jun. 22, 2018
USD ($)
Apr. 04, 2017
USD ($)
Commitments and Contingencies                    
Number of causes of action in the complaint, demurrer without leave to amend           6        
Number of causes of action in the complaint           7        
Period of partial stay of the case         60 days          
Number of additional lawsuits filed             2      
Number of consolidated cases 2     3            
Number of present and former restaurant hourly employees filed a class action lawsuit               5    
Number of restaurants receiving janitorial services   8                
Wage citation | $     $ 4.2              
Internal Revenue Service (IRS)                    
Commitments and Contingencies                    
Tax disallowance | $                   $ 12.9
Appeals Office                    
Commitments and Contingencies                    
Tax disallowance | $                 $ 8.0