XML 39 R29.htm IDEA: XBRL DOCUMENT v3.5.0.2

Basis of Presentation and Significant Accounting Policies - Additional Information (Detail) - Segment	1 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2014	Sep. 30, 2016	Dec. 31, 2014
Nature Of Business And Significant Accounting Policies [Line Items]
Number of segment		1
Contractual delinquent period of loans	180 days		180 days
Bankruptcy delinquency threshold			60 days
Previously Reported [Member]
Nature Of Business And Significant Accounting Policies [Line Items]
Contractual delinquent period of loans	365 days

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

Nature of business and significant accounting policies.

+ References

No definition available.

+ Details

Name:	rm_NatureOfBusinessAndSignificantAccountingPoliciesLineItems
Namespace Prefix:	rm_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

+ References

No definition available.

+ Details

Name:	us-gaap_NumberOfReportableSegments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
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:	us-gaap_ThresholdPeriodPastDueForWriteoffOfFinancingReceivable
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_StatementScenarioAxis=us-gaap_ScenarioPreviouslyReportedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: