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Commitments and Contingencies - Concentrations of Credit Risk (Details)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2021
USD ($)
Customer
Jun. 30, 2020
USD ($)
Customer
Jun. 30, 2021
USD ($)
Customer
Jun. 30, 2020
USD ($)
Customer
Jul. 31, 2021
USD ($)
Dec. 31, 2020
Customer
Concentration Risk [Line Items]            
Accounts receivable $ 27,500   $ 27,500      
Provision for credit losses $ 23,877 $ 1,071 $ 23,920 $ 1,344    
Ownership percentage of customer in joint venture 50.00%   50.00%      
Limetree Bay Refining, LLC | Subsequent Event            
Concentration Risk [Line Items]            
Accounts receivable, before allowance for credit loss         $ 30,000  
Limetree Bay Terminals, LLC | Subsequent Event            
Concentration Risk [Line Items]            
Accounts receivable, before allowance for credit loss         1,500  
Limetree Bay Refining, LLC And Limetree Terminal, LLC            
Concentration Risk [Line Items]            
Provision for credit losses $ 23,600          
Limetree Bay Refining, LLC And Limetree Terminal, LLC | Subsequent Event            
Concentration Risk [Line Items]            
Accounts receivable         $ 7,900  
Customer Concentration Risk            
Concentration Risk [Line Items]            
Number of customers representing ten percent or more of net receivable position | Customer 1   1     0
Number of customers representing ten percent or more of consolidated revenues | Customer 0 0 0 0    
Customer Concentration Risk | Customer With Joint Venture Interest | Accounts Receivable            
Concentration Risk [Line Items]            
Concentration risk percentage     13.40%