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Note C - Finance Receivables, Net (Details) | 12 Months Ended
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Apr. 30, 2014 | Apr. 30, 2013
Receivables [Abstract] |  |
Finance Receivables Interest Rate Range Start | 11.00% |
Finance Receivable Interest Rate Range End | 19.00% |
Finance Receivables Payment Periods Start | 18 months |
Finance Receivables Payment Periods End | 36 months |
Finance Receivables, Number Of Loan Classes | 1 |
Finance Receivables, Number Of Risk Pools | 1 |
Net Charge Offs As Percentage of Average Finance Receivables | 28.20% | 25.20%
Accounts Receivable Allowance For Credit Losses Percentage | 23.50% | 21.50%
Dellinquecies Greater Than 30 Days As Percentage Of Average Finance Receivables | 4.40% | 5.10%

X
- Definition Accounts receivable allowance for credit losses percentage. + References No definition available. + Details
Name: | crmt_AccountsReceivableAllowanceForCreditLossesPercentage
Namespace Prefix: | crmt_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Dellinquecies Greater Than 30 Days As Percentage Of Average Finance Receivables + References No definition available. + Details
Name: | crmt_DellinqueciesGreaterThan30DaysAsPercentageOfAverageFinanceReceivables
Namespace Prefix: | crmt_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The highest interest rate offered in the range of interest rates charged on installment sales. + References No definition available. + Details
Name: | crmt_FinanceReceivableInterestRateRangeEnd
Namespace Prefix: | crmt_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The lowest interest rate offered in the range of interest rates charged on installment sales. + References No definition available. + Details
Name: | crmt_FinanceReceivablesInterestRateRangeStart
Namespace Prefix: | crmt_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Finance Receivables, Number Of Loan Classes + References No definition available. + Details
Name: | crmt_FinanceReceivablesNumberOfLoanClasses
Namespace Prefix: | crmt_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Finance Receivables, Number Of Risk Pools + References No definition available. + Details
Name: | crmt_FinanceReceivablesNumberOfRiskPools
Namespace Prefix: | crmt_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition The highest number of monthly payments offered on an installment sale. + References No definition available. + Details
Name: | crmt_FinanceReceivablesPaymentPeriodsEnd
Namespace Prefix: | crmt_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The lowest number of monthly payments offered on an installment sale + References No definition available. + Details
Name: | crmt_FinanceReceivablesPaymentPeriodsStart
Namespace Prefix: | crmt_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The percentage of average finance receivables charged off + References No definition available. + Details
Name: | crmt_NetChargeOffsAsPercentageOfAverageFinanceReceivables
Namespace Prefix: | crmt_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_ReceivablesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration