XML 87 R73.htm IDEA: XBRL DOCUMENT
v3.6.0.2

Employee Benefit Plans - Additional Information (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Employee Benefit Plans [Line Items] |  |  |
Minimum service period required | 1 year |  |
Expense of employee related plan | $ 0.8 | $ 0.6 | $ 0.5
Matching Contribution up to 3% [Member] |  |  |
Employee Benefit Plans [Line Items] |  |  |
Matching contribution | 100.00% | 100.00% | 100.00%
Matching Contribution 3 to 5% [Member] |  |  |
Employee Benefit Plans [Line Items] |  |  |
Matching contribution | 50.00% | 50.00% | 50.00%
Employee Contribution Matched at 100% [Member] |  |  |
Employee Benefit Plans [Line Items] |  |  |
Employee contribution | 3.00% | 3.00% | 3.00%
Employee Contribution Matched at 50% [Member] |  |  |
Employee Benefit Plans [Line Items] |  |  |
Employee contribution | 2.00% | 2.00% | 2.00%

X
- Definition The minimum required service period in order to qualify for participation in the retirement plan. + References No definition available. + Details
Name: | rm_DefinedContributionPlanQualificationCriteriaServicePeriodMinimum
Namespace Prefix: | rm_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Employee Benefit Plans [Line Items] + References No definition available. + Details
Name: | rm_EmployeeBenefitPlansLineItems
Namespace Prefix: | rm_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of the cost recognized during the period for defined contribution plans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 70 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942 + Details
Name: | us-gaap_DefinedContributionPlanCostRecognized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan. + References No definition available. + Details
Name: | us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage employer matches of the employee's percentage contribution matched. + References No definition available. + Details
Name: | us-gaap_DefinedContributionPlanEmployerMatchingContributionPercentOfMatch
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_DefinedContributionPlanTypeAxis=rm_MatchingContributionUpToThreePercentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedContributionPlanTypeAxis=rm_MatchingContributionThreeToFivePercentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedContributionPlanTypeAxis=rm_ContributionMatchedAtHundredPercentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedContributionPlanTypeAxis=rm_ContributionMatchedAtFiftyPercentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |