XML 59 R49.htm IDEA: XBRL DOCUMENT
v3.5.0.2

Disclosure About Fair Value of Financial Instruments - Additional Information (Detail) | 9 Months Ended
--- | ---
Sep. 30, 2016
Fair Value Disclosures [Abstract] |
Turnover rate of loan portfolio | 1.4

X
- Definition The annual turnover of the finance receivables in the portfolio. + References No definition available. + Details
Name: | rm_FinanceReceivablePortfolioTurnoverRate
Namespace Prefix: | rm_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_FairValueDisclosuresAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration