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Intangible Assets - Schedule of Intangible Assets (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]    
Finite-Lived Intangible Assets, Gross $ 130,109 $ 143,587
Finite-Lived Intangible Assets, Accumulated Amortization (85,113) (84,524)
Intangible assets, net 44,996 59,063
Wholesale Fuel Supply Contracts/Rights [Member]    
Finite-Lived Intangible Assets [Line Items]    
Finite-Lived Intangible Assets, Gross 124,479 126,734
Finite-Lived Intangible Assets, Accumulated Amortization (79,791) (69,265)
Intangible assets, net 44,688 57,469
Trademarks [Member]    
Finite-Lived Intangible Assets [Line Items]    
Finite-Lived Intangible Assets, Gross 1,078 1,095
Finite-Lived Intangible Assets, Accumulated Amortization (1,072) (1,006)
Intangible assets, net 6 89
Covenant Not to Compete [Member]    
Finite-Lived Intangible Assets [Line Items]    
Finite-Lived Intangible Assets, Gross 4,552 4,581
Finite-Lived Intangible Assets, Accumulated Amortization (4,250) (4,077)
Intangible assets, net $ 302 504
Below Market Lease [Member]    
Finite-Lived Intangible Assets [Line Items]    
Finite-Lived Intangible Assets, Gross   11,177
Finite-Lived Intangible Assets, Accumulated Amortization   (10,176)
Intangible assets, net   $ 1,001