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Acquisitions - Additional Information (Details)
$ in Thousands
3 Months Ended
Mar. 23, 2018
USD ($)
gasoline_store_facility
Mar. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Business Acquisition [Line Items]      
Goodwill   $ 152,884 $ 107,187
Northwest Retail Acquisition      
Business Acquisition [Line Items]      
Number of retail gasoline, convenience store facilities | gasoline_store_facility 21    
Number of leased retail gasoline, convenience store facilities | gasoline_store_facility 12    
Consideration transferred $ 75,000    
Goodwill $ 45,683    
Integration and acquisition related costs   $ 600