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Note C - Finance Receivables, Net (Details) - Average Financing Receivable Contract Terms | 12 Months Ended
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Apr. 30, 2015 | Apr. 30, 2014
Average Financing Receivable Contract Terms [Abstract] |  |
Average originating contract term (in months) | 27 months 21 days | 27 months 12 days
Portfolio weighted average contract term, including modifications (in months) | 30 months 6 days | 29 months 24 days

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- Details
Name: | crmt_AverageFinancingReceivableContractTermsAbstract
Namespace Prefix: | crmt_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Represents the average originating contract term. + References No definition available. + Details
Name: | crmt_AverageOriginatingContractTerm
Namespace Prefix: | crmt_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Represents the portfolio weighted average contract term, including modifications. + References No definition available. + Details
Name: | crmt_PortfolioWeightedAverageContractTermIncludingModifications
Namespace Prefix: | crmt_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration