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Note C - Finance Receivables, Net (Details) - Financing Receivables Analysis	12 Months Ended
	Apr. 30, 2015	Apr. 30, 2014
Financing Receivables Analysis [Abstract]
Principal collected as a percent of average finance receivables	58.70%crmt_PrincipalCollectedAsAPercentOfAverageFinancingReceivables	58.00%crmt_PrincipalCollectedAsAPercentOfAverageFinancingReceivables
Average down-payment percentage	6.90%crmt_AverageDownpaymentPercentage	6.60%crmt_AverageDownpaymentPercentage

X

- Definition

Represents the average down-payment percentage

+ References

No definition available.

+ Details

Name:	crmt_AverageDownpaymentPercentage
Namespace Prefix:	crmt_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	crmt_FinancingReceivablesAnalysisAbstract
Namespace Prefix:	crmt_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Represents the principal collected as a percent of average finance receivables.

+ References

No definition available.

+ Details

Name:	crmt_PrincipalCollectedAsAPercentOfAverageFinancingReceivables
Namespace Prefix:	crmt_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration