XML 43 R36.htm IDEA: XBRL DOCUMENT
v3.26.1

Basis of Presentation and Significant Accounting Policies - Additional Information (Detail) | 3 Months Ended
--- | ---
Mar. 31, 2026
Significant Accounting Policies [Line Items] |
Contractual delinquent period of loans | 180 days
Bankruptcy delinquency threshold | 60 days
Delinquency interest accrual cessation | 90 days
Threshold period to write off financing receivable | 90 days
Exercise period of options | 10 years
Non-Employee Directors [Member] |
Significant Accounting Policies [Line Items] |
Non-employee director compensation grant period | 5 days
Long Term Incentive Plan [Member] |
Significant Accounting Policies [Line Items] |
Holding period post vesting date | 1 year
Pre provision return on assets percentage | 20.00%
Maximum payout percentage | 170.00%
Performance target for achievement period | 3 years
Maximum [Member] | Graded and Cliff Vesting [Member] |
Significant Accounting Policies [Line Items] |
Vesting period of options | 5 years
Maximum [Member] | Long Term Incentive Plan [Member] |
Significant Accounting Policies [Line Items] |
Percentage of performance target for achievement | 150.00%
Percentage of performance target for achievement based on cumulative total shareholder return | 150.00%
Minimum [Member] | Long Term Incentive Plan [Member] |
Significant Accounting Policies [Line Items] |
Percentage of performance target for achievement | 0.00%
Percentage of performance target for achievement based on cumulative total shareholder return | 0.00%

X
- Definition The additional holding period following the vest date to which the awards are subject. + References No definition available. + Details
Name: | rm_AdditionalHoldingPeriodPostVestingDate
Namespace Prefix: | rm_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Threshold period past due for non-titled accounts in a confirmed bankruptcy to write off as uncollectible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | rm_BankruptcyThresholdPeriodPastDueForWriteOffOfFinancingReceivables
Namespace Prefix: | rm_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of days after the annual meeting stockholder meeting that the board compensation will be granted. + References No definition available. + Details
Name: | rm_BoardCompensationGrantPeriod
Namespace Prefix: | rm_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of days contractually past due before interest ceases accruing. + References No definition available. + Details
Name: | rm_FinanceReceivablesIncomeRecognitionContractualDelinquentPeriod
Namespace Prefix: | rm_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The maximum performance target payout, including the additive performance component, over the life of the performance period for performance based awards granted as a percentage of the target amount. + References No definition available. + Details
Name: | rm_MaximumPayoutPercentage
Namespace Prefix: | rm_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The performance target payout over the life of the performance period for performance based awards granted as a percentage of the target amount. + References No definition available. + Details
Name: | rm_PerformanceTargetForAchievement
Namespace Prefix: | rm_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Performance Target For Achievement based on cumulative total shareholder return. + References No definition available. + Details
Name: | rm_PerformanceTargetForAchievementBasedOnCumulativeTotalShareholderReturn
Namespace Prefix: | rm_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The period over which performance is evaluated against a target. + References No definition available. + Details
Name: | rm_PerformanceTargetForAchievementPeriod
Namespace Prefix: | rm_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The maximum additive payout percentage based on the performance of the Company's pre-provision return on assets metric over the performance period. + References No definition available. + Details
Name: | rm_PreProvisionReturnOnAssetsPercentage
Namespace Prefix: | rm_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Disclosure of significant accounting policies used in preparing the financial statements. + References No definition available. + Details
Name: | rm_SignificantAccountingPoliciesLineItems
Namespace Prefix: | rm_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Threshold period past due for financing receivable to write off as uncollectible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | rm_ThresholdPeriodPastDueForWriteOffOfFinancingReceivables
Namespace Prefix: | rm_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Threshold period for when financing receivable is considered past due to write off as uncollectible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 14 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-14 + Details
Name: | us-gaap_FinancingReceivableThresholdPeriodPastDueWriteoff
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | instant

X
- Definition Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
Name: | us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_TitleOfIndividualAxis=srt_DirectorMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PlanNameAxis=rm_LongTermIncentivePlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_VestingAxis=rm_GradedAndCliffVestingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |