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Refranchising of Company-operated Restaurants (Details)
$ in Thousands
1 Months Ended 9 Months Ended
Jun. 30, 2017
USD ($)
Franchisee
agreement
Sep. 30, 2017
USD ($)
Restaurant
agreement
Sep. 30, 2016
USD ($)
Operating Leased Assets [Line Items]      
Number of franchise agreements | agreement   4,000  
Proceeds from sale of restaurant assets   $ 1,100 $ 0
Franchised Units      
Operating Leased Assets [Line Items]      
Number of restaurants refranchised (restaurant) | Restaurant   9  
IHOP | Cincinnati, Ohio market area restaurants      
Operating Leased Assets [Line Items]      
Number of sublease agreements | agreement 9    
IHOP | Cincinnati, Ohio market area restaurants | Franchised Units      
Operating Leased Assets [Line Items]      
Number of restaurants refranchised (restaurant) | Franchisee 9    
Number of franchise agreements | agreement 9    
Favorable lease assets, net   $ 2,300  
Proceeds from sale of restaurant assets $ 1,100    
Note receivable acquired in sale of restaurant assets $ 4,800    
Gain on refranchising and sale   $ 6,200