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Note C - Average Financing Receivable Contract Terms (Details)	6 Months Ended
	Oct. 31, 2015	Oct. 31, 2014
Portfolio weighted average contract term, including modifications (in months)	2 years 198 days	2 years 168 days

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- Definition

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