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Investment in Laramie Energy, LLC - Narrative (Details) - Laramie Energy Company - USD ($)
Mar. 31, 2021
Dec. 31, 2020
Schedule of Equity Method Investments [Line Items]    
Ownership interest in Laramie Energy, LLC 46.00%  
Investment in Laramie Energy, LLC $ 0 $ 0
Revolving Credit Facility    
Schedule of Equity Method Investments [Line Items]    
Credit facility, maximum borrowing amount 400,000,000  
Asset borrowing base 130,600,000  
Balance outstanding on the revolving credit facility $ 190,600,000