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Fair Value Measurements - Narrative (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Apr. 13, 2020
Mar. 31, 2020
Sep. 30, 2019
Sep. 27, 2018
Jun. 30, 2016
Schedule of Equity Method Investments [Line Items]                
Asset impairment loss $ 85,806 $ 0 $ 0          
Measurement Input, Discount Rate                
Schedule of Equity Method Investments [Line Items]                
Fair value, input, level 3         10.00% 8.00%    
5.00% Convertible Senior Notes due 2021                
Schedule of Equity Method Investments [Line Items]                
Debt instrument, interest rate 5.00%             5.00%
7.75% Senior Secured Notes due 2025                
Schedule of Equity Method Investments [Line Items]                
Debt instrument, interest rate 7.75%              
Mid Pac Term Loan due 2028 | Term Loan                
Schedule of Equity Method Investments [Line Items]                
Debt instrument, interest rate             4.375%  
PHL Term Loan due 2030 | Term Loan                
Schedule of Equity Method Investments [Line Items]                
Debt instrument, interest rate       2.75%        
Laramie Energy Company                
Schedule of Equity Method Investments [Line Items]                
Equity method investments, fair value         $ 1,900 $ 51,800    
Equity method investment, aggregate cost         $ 47,200 $ 133,300    
Impairment charge $ 45,294 81,515 0          
Asset impairment loss 0 $ 355,220 $ 0          
Refining                
Schedule of Equity Method Investments [Line Items]                
Impairment expense 38,100              
Retail                
Schedule of Equity Method Investments [Line Items]                
Impairment expense 29,800              
Par West - Asset Acquisition                
Schedule of Equity Method Investments [Line Items]                
Asset impairment loss $ 17,900