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Segment Reporting - Additional Information (Details)
$ in Millions
 1 Months Ended 3 Months Ended 12 Months Ended
Oct. 01, 2020
USD ($)
Jun. 30, 2019
Site
RenewalOption
Jun. 30, 2018
RenewalOption
Sep. 30, 2019
Site
Dec. 31, 2019
USD ($)
Segment
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Segment Reporting Information [Line Items]              
Number of reportable segments | Segment         2    
Contract costs, unamortized balance         $ 6.5 $ 5.7  
Contract costs, amortization against operating revenues         1.0 $ 0.9 $ 0.6
Wholesale [Member]              
Segment Reporting Information [Line Items]              
Loss on sale of inventory         0.5    
Goodwill reassignment         $ 4.5    
Applegreen plc [Member] | Master Fuel Supply and Master Lease Agreements [Member]              
Segment Reporting Information [Line Items]              
Lease agreements initial terms   10 years 10 years        
Number of renewal options | RenewalOption   4 4        
Lease renewal options terms   5 years 5 years        
Lease agreement term description   Applegreen. During the third quarter of 2019, we dealerized 46 company operated Upper Midwest sites. The master fuel supply and master lease agreements have an initial 10-year term with four 5-year renewal options.     a third-party multi-site operator of retail motor fuel stations, to which we transitioned 43 sites in Florida from DMS in the third quarter of 2018. The master fuel supply and master lease agreements have an initial 10-year term with four 5-year renewal options.    
Base Rent annual increase percentage   1.50%          
Lease agreement sever up options description   Applegreen has the right to sever up to 10 specifically identified sites, for which notice must be provided prior to the end of the first year, and the effective date will be after the second year. Applegreen has the right to sever up to eight of the remaining 36 sites with proper notice.          
Lease agreement sever up options   true          
Applegreen plc [Member] | Master Fuel Supply and Master Lease Agreements [Member] | Scenario, Forecast [Member]              
Segment Reporting Information [Line Items]              
Committed amount to making EMV upgrades $ 2.2            
Applegreen plc [Member] | Master Fuel Supply and Master Lease Agreements [Member] | U.S. Upper Midwest [Member]              
Segment Reporting Information [Line Items]              
Number of sites dealerized | Site   46   46