Debt Instrument, Extension Term

No definition available.

Name:	opfi_DebtInstrumentExtensionTerm
Namespace Prefix:	opfi_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Debt Instrument, Initial Draw Six Months After Close, Principal Amount

+ References

No definition available.

+ Details

Name:	opfi_DebtInstrumentInitialDrawSixMonthsAfterClosePrincipalAmount
Namespace Prefix:	opfi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Debt Instrument, Original Issuance Discount, Percentage

+ References

No definition available.

+ Details

Name:	opfi_DebtInstrumentOriginalIssuanceDiscountPercentage
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Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Debt Instrument, Semi-Annual Amortization Payments, Percentage

+ References

No definition available.

+ Details

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Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Debt Instrument, Subsequent Draws, Principal Amount

+ References

No definition available.

+ Details

Name:	opfi_DebtInstrumentSubsequentDrawsPrincipalAmount
Namespace Prefix:	opfi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

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

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

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

+ References

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+ Details

Name:	us-gaap_DebtInstrumentFaceAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

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

+ References

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+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Period between issuance and maturity of debt instrument, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentTerm
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of the cost of borrowed funds accounted for as interest expense for debt.

+ References

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+ Details

Name:	us-gaap_InterestExpenseDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- 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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+ Details

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

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

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+ Details

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

- Definition

The cash inflow from a debt initially having maturity due after one year or beyond the operating cycle, if longer.

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Name:	us-gaap_ProceedsFromIssuanceOfLongTermDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of cash inflow from contractual arrangement with the lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

+ References

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+ Details

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Balance Type:	debit
Period Type:	duration

- 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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Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_NotesPayableOtherPayablesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=opfi_AAndRCreditAgreementTrancheCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
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Data Type:	na
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Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=opfi_ThirdAmendmentToSecondAmendedAndRestatedRevolvingCreditAgreementMember
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Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=opfi_RevolvingLineOfCreditMaturingApril2025GrayRockSPVLLCMember
Namespace Prefix:
Data Type:	na
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Period Type:

- Details

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- Details

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- Details

Name:	us-gaap_DebtInstrumentAxis=opfi_TermLoanAgreementMember
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Balance Type:
Period Type:

- Details

Name:	opfi_InterestRateComponentAxis=opfi_InterestRateComponentOneMember
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- Details

Name:	opfi_InterestRateComponentAxis=opfi_InterestRateComponentTwoMember
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Senior Debt - Additional Information (Details) - USD ($) $ in Thousands					3 Months Ended		9 Months Ended
	Sep. 15, 2026	Aug. 10, 2026	Apr. 15, 2026	Jan. 01, 2026	Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025
Short-term Debt [Line Items]
Borrowings of senior debt - revolving lines of credit							$ 91,523	$ 195,935
Line of Credit
Short-term Debt [Line Items]
Borrowing Capacity					$ 550,000		550,000
Notes Payable
Short-term Debt [Line Items]
Interest expense, debt					8,000	$ 9,200	23,300	$ 27,400
A&R Credit Agreement, Tranche C \| Line of Credit
Short-term Debt [Line Items]
Basis spread on variable rate				7.30%
Revolving Credit Facility \| Third Amendment
Short-term Debt [Line Items]
Borrowings of senior debt - revolving lines of credit			$ 46,500
Revolving Credit Facility \| Line of Credit
Short-term Debt [Line Items]
Borrowing Capacity					450,000		$ 450,000
Revolving Line Of Credit, Maturing April 2025, Gray Rock SPV, LLC \| Senior Notes
Short-term Debt [Line Items]
Borrowing Capacity			$ 75,000
Secured Debt \| Line of Credit \| Term loan
Short-term Debt [Line Items]
Basis spread on variable rate							12.50%
Borrowing Capacity					$ 100,000		$ 100,000
Debt instrument, face amount		$ 100,000
Original issuance discount, percentage		1.25%
Debt term		4 years
Debt instrument, extension term		1 year
Semi-annual amortization payments, percentage		10.00%
Debt instrument, initial draw, principal amount		$ 75,000
Debt instrument, subsequent draws, principal amount		$ 5,000
Aggregate principal amount	$ 75,000
Remaining borrowing capacity	$ 25,000
Secured Debt \| Line of Credit \| Term loan \| Interest Rate Component One
Short-term Debt [Line Items]
Interest rate		12.50%
Secured Debt \| Line of Credit \| Term loan \| Interest Rate Component Two
Short-term Debt [Line Items]
Interest rate		13.50%