Line of Credit Facility, Accordion Feature, Increase Limit

No definition available.

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

- Definition

Line of Credit Facility, Accordion Feature, Maximum Borrowing Capacity

+ References

No definition available.

+ Details

Name:	opfi_LineOfCreditFacilityAccordionFeatureMaximumBorrowingCapacity
Namespace Prefix:	opfi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

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

+ References

No definition available.

+ Details

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

- Definition

Amount of the required periodic payments including both interest and principal payments.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

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

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
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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.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22)(b))
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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 cash outflow for cost from early extinguishment and prepayment of debt. Includes, but is not limited to, third-party cost, premium paid, and other fee paid to lender directly for debt extinguishment or debt prepayment. Excludes accrued interest.

+ References

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-Subparagraph (g)
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+ Details

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

- Definition

Amount of cash outflow for short-term and long-term debt. Excludes payment of lease obligation.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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-SubTopic 10
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+ Details

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

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Borrowings - Additional Information (Detail) - USD ($)									12 Months Ended
Borrowings - Additional Information (Detail) - USD ($)	Jan. 01, 2026	Sep. 29, 2025	Feb. 13, 2025	Sep. 13, 2024	May 30, 2024	Apr. 12, 2024	Apr. 11, 2024	Jul. 19, 2023	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023	Feb. 12, 2025	Dec. 14, 2022	Jun. 14, 2022	Apr. 15, 2022	Apr. 30, 2020	Nov. 30, 2018
Note payable
Short-term Debt [Line Items]
Interest expense, debt									$ 0	$ 100,000	$ 100,000
Revolving Line Of Credit, Maturing October 2023, Opportunity Funding SPE V, LLC; Opportunity Funding SPE VII, LLC \| Senior Notes
Short-term Debt [Line Items]
Borrowing Capacity														$ 200,000,000.0
A&R Credit Agreement \| Line of Credit
Short-term Debt [Line Items]
Borrowing Capacity			$ 300,000,000.0					$ 250,000,000.0				$ 250,000,000.0
A And R Credit Agreement , Tranche B, Maturing July 2027 \| Line of Credit
Short-term Debt [Line Items]
Borrowing Capacity								125,000,000.0
A And R Credit Agreement, Tranche C \| Line of Credit
Short-term Debt [Line Items]
Borrowing Capacity			$ 62,500,000					125,000,000.0
Line of credit facility, accordion feature, increase limit								25,000,000.0
Line of credit facility, accordion feature, maximum borrowing capacity								$ 150,000,000.0
Basis spread on variable rate (in percent)			7.75%
A And R Credit Agreement, Tranche C \| Line of Credit \| Forecast
Short-term Debt [Line Items]
Basis spread on variable rate (in percent)	7.30%
Revolving Line Of Credit, Maturing December 2026, Opportunity Funding SPE IX, LLC \| Senior Notes
Short-term Debt [Line Items]
Borrowing Capacity													$ 150,000,000.0
Revolving Line Of Credit, Maturing April 2025, Gray Rock SPV, LLC \| Senior Notes
Short-term Debt [Line Items]
Borrowing Capacity															$ 75,000,000.0
Basis spread on variable rate (in percent)						7.45%	7.25%
Term loan, net \| Senior Notes
Short-term Debt [Line Items]
Borrowing Capacity																$ 50,000,000.0	$ 25,000,000.0
Interest expense, debt									$ 36,200,000	$ 42,200,000	$ 44,200,000
Term loan, net \| Secured Debt
Short-term Debt [Line Items]
Debt prepayments amount					$ 10,000,000.0
Term loan, net \| Secured Debt \| Debt Instrument, Redemption, Period One
Short-term Debt [Line Items]
Debt instrument, periodic payment				$ 20,000,000.0
Term loan, net \| Secured Debt \| Debt Instrument, Redemption, Period Two
Short-term Debt [Line Items]
Debt instrument, periodic payment				$ 10,000,000.0
Term loan, net \| Secured Debt \| Minimum
Short-term Debt [Line Items]
Debt prepayments amount					$ 10,000,000.0
A And R Credit Agreement, Tranche D \| Line of Credit
Short-term Debt [Line Items]
Borrowing Capacity			$ 237,500,000
Basis spread on variable rate (in percent)			7.30%
SPE IX Agreement \| Line of Credit
Short-term Debt [Line Items]
Borrowing Capacity		$ 150,000,000.0
Basis spread on variable rate (in percent)		6.00%
Repayments of debt		$ 79,000,000.0