v3.26.1
Long-Term Debt - Narrative (Details)
$ in Millions
3 Months Ended 6 Months Ended
Mar. 17, 2026
USD ($)
Jan. 12, 2026
USD ($)
Aug. 12, 2025
USD ($)
May 24, 2025
USD ($)
Feb. 18, 2025
USD ($)
item
Jan. 16, 2025
USD ($)
Sep. 30, 2024
USD ($)
Mar. 07, 2024
USD ($)
Jun. 27, 2023
USD ($)
Jan. 20, 2022
USD ($)
Jun. 30, 2026
USD ($)
Jun. 30, 2025
USD ($)
Jun. 30, 2026
USD ($)
Jun. 30, 2025
USD ($)
Jan. 23, 2026
USD ($)
Dec. 31, 2025
USD ($)
Jan. 10, 2025
USD ($)
Nov. 25, 2024
USD ($)
Debt Instruments                                    
Repayments of borrowings - senior notes                         $ 449.4 $ 150.0        
Finance lease obligations                     $ 1.0   1.0     $ 1.9    
Debt extinguishment costs                     0.0 $ (0.1) (1.7) (47.7)        
Debt instrument collateral amount                     150.0   150.0          
US Department of Energy facility | US Government Agency Insured Loans                                    
Debt Instruments                                    
Senior secured revolving credit facility         $ 658.0                          
Guarantor obligations, maximum exposure                                 $ 1,440.0  
Number of tranches | item         2                          
Proceeds from agreement         $ 781.8                          
Capitalized accrued interest                     53.4   53.4          
Maximum amount of capitalized accrued interest allowed                     232.8   232.8          
Revolving credit facility                                    
Debt Instruments                                    
Senior secured revolving credit facility                             $ 500.0      
Commitment amount upon inventory financing                             $ 425.0      
Line of credit facility, current borrowing capacity                     500.0   500.0          
Senior secured revolving credit facility                     18.3   18.3     94.6    
Letters of credit outstanding, amount                     49.9   49.9     $ 75.2    
Line of credit facility, remaining borrowing capacity                     $ 431.8   431.8          
Fixed charge coverage amount                         $ 35.0          
Fixed charge coverage ratio                     1.0   1.0          
9.75% Senior Notes due 2031                                    
Debt Instruments                                    
Fixed interest rate (in percent)   9.75%                 9.75%   9.75%     9.75%    
Face amount $ 150.0 $ 405.0                                
Proceeds from debt, net $ 154.9 $ 393.0                                
Additional notes issued percentage 105.00%                                  
9.25% Senior Notes due 2029                                    
Debt Instruments                                    
Fixed interest rate (in percent)               9.25%     9.25%   9.25%     9.25%    
Face amount               $ 200.0                    
Proceeds from debt, net               $ 199.0                    
9.75% Senior Notes due 2028                                    
Debt Instruments                                    
Fixed interest rate (in percent)                 9.75%   9.75%   9.75%     9.75%    
Face amount                 $ 325.0                  
Proceeds from debt, net                 $ 319.1                  
9.75% Senior Notes due 2028 - Mirror Issuance Notes                                    
Debt Instruments                                    
Fixed interest rate (in percent)           9.75%         9.75%   9.75%     9.75%    
Face amount           $ 100.0                        
Proceeds from debt, net           $ 96.0                        
8.125% Senior Notes due 2027                                    
Debt Instruments                                    
Fixed interest rate (in percent)                   8.125% 8.125%   8.125%     8.125%    
Face amount                   $ 325.0                
Proceeds from debt, net                   $ 319.1                
11.00% Senior Notes due 2026                                    
Debt Instruments                                    
Fixed interest rate (in percent)                     11.00%   11.00%     11.00%   11.00%
Face amount                                   $ 354.4
Repayments of borrowings - senior notes     $ 80.0 $ 150.0                            
Montana refinery asset financing arrangement                                    
Debt Instruments                                    
Total purchase price         40.0                          
Finance lease obligations             $ 150.0                      
Sale proceeds from sale leaseback             $ 110.0                      
Montana refinery asset financing arrangement | US Department of Energy facility | US Government Agency Insured Loans                                    
Debt Instruments                                    
Proceeds from agreement         $ 782.0                          
MRL Asset #4                                    
Debt Instruments                                    
Debt extinguishment costs                           34.8        
MRL Term Loan Credit Agreement                                    
Debt Instruments                                    
Debt extinguishment costs                           $ 12.3