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Note C - Finance Receivables (Details) - Average Financing Receivable Contract Terms | 3 Months Ended
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Jul. 31, 2014 | Jul. 31, 2013
Average Financing Receivable Contract Terms [Abstract] |  |
Portfolio weighted average contract term, including modifications (in months) | 29 months 18 days | 29 months 15 days

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