Percentage of par value for issuance of debt.

No definition available.

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Balance Type:	na
Period Type:	duration

- Definition

Incremental Uncommitted Expansion Feature

+ References

No definition available.

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Balance Type:	credit
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- Definition

Line of Credit Amendment

+ References

No definition available.

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- Definition

MRL asset financing arrangement

+ References

No definition available.

+ Details

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- Definition

MRL Revolving Credit Agreement, Maximum Borrowing Capacity

+ References

No definition available.

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- Definition

MRL Revolving Credit Agreement , Maximum Borrowing Capacity, Optional Increase per request

+ References

No definition available.

+ Details

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- Definition

Number of tranches.

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No definition available.

+ Details

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Data Type:	xbrli:integerItemType
Balance Type:	na
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- Definition

The amount of cash outflow from sale of equipment in a sale and lease back transaction.

+ References

No definition available.

+ Details

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- Definition

The purchase price of the assets sold and leased back to the seller.

+ References

No definition available.

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- Definition

The quarterly installments of borrowings payable in percentage of outstanding principal.

+ References

No definition available.

+ Details

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- Definition

The remaining purchase price of assets in sale and lease back transaction yet to disburse.

+ References

No definition available.

+ Details

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- Definition

Term Loan Facility, Maximum Borrowing Capacity

+ References

No definition available.

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- Definition

Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Includes, but is not limited to, one-time termination benefits, termination of an operating lease or other contract, consolidating or closing facilities, and relocating employees, and termination benefits associated with an ongoing benefit arrangement. Excludes expenses associated with special or contractual termination benefits, a discontinued operation or an asset retirement obligation.

+ References

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- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

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- Definition

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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- Definition

States whether the entity was in compliance with the debt covenants throughout the reporting period, and describes facts and circumstances of any compliance failure.

+ References

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- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

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- Definition

Date the debt instrument was issued, in YYYY-MM-DD format.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Name:	us-gaap_DebtInstrumentLineItems
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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Fair value amount of debt instrument that was repurchased.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Indicates type of variable interest rate on debt instrument.

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Balance Type:	na
Period Type:	duration

- Definition

The cash outflow for the extinguishment of long-term borrowing, with the highest claim on the assets of the entity in case of bankruptcy or liquidation, before its maturity.

+ References

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

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- Definition

Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions.

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Data Type:	xbrli:monetaryItemType
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Period Type:	instant

- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

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No definition available.

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Data Type:	xbrli:monetaryItemType
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Period Type:	instant

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The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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Balance Type:	credit
Period Type:	instant

- Definition

Description of the conditions for borrowing under the credit facility including the nature of any restrictions.

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- Definition

Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

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- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

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Long-Term Debt - Narrative (Details) $ in Millions													3 Months Ended
Long-Term Debt - Narrative (Details) $ in Millions	May 08, 2025 USD ($)	Feb. 18, 2025 USD ($) item	Jan. 16, 2025 USD ($)	Jan. 10, 2025 USD ($)	Sep. 30, 2024 USD ($)	Apr. 15, 2024 USD ($)	Mar. 07, 2024 USD ($)	Jan. 17, 2024 USD ($)	Jun. 28, 2023 USD ($)	Jun. 27, 2023 USD ($)	Apr. 19, 2023 USD ($)	Nov. 02, 2022 USD ($)	Mar. 31, 2025 USD ($)	Mar. 31, 2024 USD ($)	Jan. 06, 2025 USD ($)	Dec. 31, 2024 USD ($)	Aug. 05, 2022 USD ($)
Debt Instruments
Fixed interest rate													11.00%			11.00%
Repayments of borrowings - senior notes														$ 179.0
Debt instrument, covenant compliance													in compliance with all covenants under the indentures governing the Senior Notes
Line of credit facility, remaining borrowing capacity													$ 339.3
Debt extinguishment costs													(47.6)	(0.2)
MRL asset financing arrangements																$ 368.1
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration]											us-gaap:SecuredOvernightFinancingRateSofrMember
Payment to purchase equipment													$ 17.6	$ 20.0
US Government Agency Insured Loans \| US Department of Energy facility
Debt Instruments
Proceeds from agreement		$ 658.0
Guarantor obligations, maximum exposure				$ 1,440.0
Number of tranches \| item		2
US Government Agency Insured Loans \| US Department of Energy facility \| Tranche One
Debt Instruments
Proceeds from agreement		$ 781.8
9.25% Senior Secured First Lien Notes due 2029 (the "2029 Secured Notes")
Debt Instruments
Fixed interest rate							9.25%
Senior notes, issuance date							Mar. 07, 2024
Senior notes issued, gross							$ 200.0
Proceeds from debt							$ 199.0
Debt instrument, repurchase amount										$ 200.0
9.75% July 2028, Notes
Debt Instruments
Fixed interest rate										9.75%			9.75%
Senior notes, issuance date										Jun. 27, 2023
Senior notes issued, gross										$ 325.0
Proceeds from debt										319.1
Proceeds used for repurchase of debt									$ 125.5
8.125% Senior Notes due July 2027
Debt Instruments
Fixed interest rate													8.125%			8.125%
11.00% Senior Notes due 2026 \| Subsequent Event
Debt Instruments
Repayments of borrowings - senior notes	$ 150.0
11.0% Senior Notes due April 2025
Debt Instruments
Fixed interest rate							11.00%
Proceeds used for repurchase of debt							$ 50.0
Debt instrument, repurchase amount									100.0	$ 100.0
9.25% Senior Notes due July 2024
Debt Instruments
Fixed interest rate							9.25%
Revolving Credit Facility
Debt Instruments
Senior secured revolving credit facility															$ 170.0
Debt instrument, covenant compliance													in compliance with all covenants under the revolving credit facility.
Line of credit amendment								Jan. 17, 2024
Line of credit facility, covenant terms													if the Company’s availability to borrow loans under the revolving credit facility falls below the sum of (a) the greater of (i) (x) 15% of the borrowing base then in effect at the same time that the refinery asset borrowing base component is greater than $0 and (y) 10% of the borrowing base then in effect at any time that the refinery asset borrowing base component is equal to $0 and (ii) $45.0 million (which amount is subject to certain increases) plus (b) the amount of FILO Loans outstanding, then the Company will be required to maintain as of the end of each fiscal quarter a Fixed Charge Coverage Ratio (as defined in the Credit Agreement) of at least 1.0 to 1.0.
Letters of credit outstanding, amount													$ 62.5
Line of credit facility, current borrowing capacity													455.6
Long-term line of credit													53.8			$ 286.6
Incremental Uncommitted Expansion Feature								$ 500.0
Term Loan Facility, Maximum Borrowing Capacity								$ 650.0
MRL Asset #2
Debt Instruments
MRL asset financing arrangements																	$ 250.0
MRL Asset #3
Debt Instruments
MRL asset financing arrangements																	100.0
MRL Asset #4
Debt Instruments
Debt extinguishment costs													34.8
MRL asset financing arrangements																	$ 50.0
MRL Revolving Credit Agreement
Debt Instruments
Senior notes, issuance date												Nov. 02, 2022
Proceeds used for repurchase of debt				26.7
Debt extinguishment costs													0.3
MRL revolving credit agreement , maximum borrowing capacity, optional Increase per request												$ 15.0
MRL revolving credit agreement, maximum borrowing capacity												$ 90.0
2025 Notes
Debt Instruments
Proceeds used for repurchase of debt						$ 50.0
Debt instrument, repurchase amount									$ 21.0
MRL Term Loan Credit Agreement
Debt Instruments
Senior notes, issuance date											Apr. 19, 2023
Proceeds used for repurchase of debt				83.8
Debt extinguishment costs													12.3
Quarterly installments of borrowings payable in percentage of outstanding principal											0.25%
Face amount				9.4							$ 75.0
MRL Term Loan Credit Agreement \| Minimum
Debt Instruments
Debt instrument, basis spread on variable rate											6.00%
MRL Term Loan Credit Agreement \| Maximum
Debt Instruments
Debt instrument, basis spread on variable rate											7.30%
Montana refinery asset financing arrangement
Debt Instruments
Purchase price of assets sold and leased back													$ 150.0
Remaining purchase price		40.0
Total purchase price		40.0			$ 110.0
Montana refinery asset financing arrangement \| US Government Agency Insured Loans \| US Department of Energy facility \| Tranche One
Debt Instruments
Proceeds from agreement		$ 781.8
9.75% July 2028, Mirror issuance notes
Debt Instruments
Fixed interest rate			9.75%										9.75%
Senior notes issued, gross			$ 100.0
Proceeds from debt			$ 96.0
Percentage of par value for issuance of debt			98.00%
MRL Supply And Offtake Agreement
Debt Instruments
Repayments of borrowings - senior notes				0.7
Proceeds used for repurchase of debt				32.5
Payment to purchase equipment				392.2
Exit fees				$ 23.0