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Intangible Assets - Schedule of Intangible Assets (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]    
Finite-Lived Intangible Assets, Gross $ 194,093 $ 130,109
Finite-Lived Intangible Assets, Accumulated Amortization (101,181) (85,113)
Intangible assets, net 92,912 44,996
Wholesale Fuel Supply Contracts/Rights [Member]    
Finite-Lived Intangible Assets [Line Items]    
Finite-Lived Intangible Assets, Gross 187,643 124,479
Finite-Lived Intangible Assets, Accumulated Amortization (95,694) (79,791)
Intangible assets, net 91,949 44,688
Trademarks/Licenses [Member]    
Finite-Lived Intangible Assets [Line Items]    
Finite-Lived Intangible Assets, Gross 1,898 1,078
Finite-Lived Intangible Assets, Accumulated Amortization (1,115) (1,072)
Intangible assets, net 783 6
Covenant Not to Compete [Member]    
Finite-Lived Intangible Assets [Line Items]    
Finite-Lived Intangible Assets, Gross 4,552 4,552
Finite-Lived Intangible Assets, Accumulated Amortization (4,372) (4,250)
Intangible assets, net $ 180 $ 302