(Loss) Earnings Per Share - Schedule of Computation of Basic and Diluted Earnings Per Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Numerator:
Net (loss) income attributable to OppFi Inc.	$ (571)	$ 14,125	$ 3,963	$ 14,125
Net (loss) income available to Class A common stockholders - Basic	(571)	14,125	3,963	14,125
Dilutive effect of warrants on net income to Class A common stockholders	0	0	0	0
Net (loss) income attributable to noncontrolling interest	(90)	16,267	4,576	58,638
Provision for income taxes	0	(3,308)	(1,105)	(3,308)
Net (loss) income available to Class A common stockholders - Diluted	$ (571)	$ 24,485	$ 7,434	$ 24,485
Denominator:
Weighted average Class A common stock outstanding - Basic (in shares)	13,972,971	13,363,996	13,694,733	13,107,874
Effect of dilutive securities:
Dilutive common unit equivalents (in shares)	0	71,100,787	70,582,544	71,356,909
Weighted average units outstanding - diluted (in shares)	13,972,971	84,464,783	84,277,277	84,464,783
Basic EPS (in dollars per share)	$ (0.04)	$ 1.06	$ 0.29	$ 1.08
Diluted EPS (in dollars per share)	$ (0.04)	$ 0.29	$ 0.09	$ 0.29
Previously Reported
Numerator:
Net (loss) income attributable to noncontrolling interest	$ 0	$ 13,668	$ 4,576	$ 13,668
Stock Options
Effect of dilutive securities:
Dilutive securities (in shares)	0	0	0	0
Restricted stock units
Effect of dilutive securities:
Dilutive securities (in shares)	0	0	123,722	0
Performance stock units
Effect of dilutive securities:
Dilutive securities (in shares)	0	0	11,986	0
Warrants
Effect of dilutive securities:
Warrants (in shares)	0	0	0	0
Employee Stock
Effect of dilutive securities:
Dilutive securities (in shares)	0	0	0	0
Units, Excluding Earnout Units
Effect of dilutive securities:
Dilutive securities (in shares)	0	71,100,787	70,446,836	71,356,909

Income Tax Expense (Benefit), Portion Attributable To Noncontrolling Interest

No definition available.

Name:	opfi_IncomeTaxExpenseBenefitPortionAttributableToNoncontrollingInterest
Namespace Prefix:	opfi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of increase (decrease) to net income used for calculating diluted earnings per share (EPS), resulting from the assumed exercise stock options, restrictive stock units (RSUs), convertible preferred stock of an employee stock ownership plan (ESOP), and other dilutive convertible securities.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-URI https://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257