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Note C - Financing Receivables Analysis (Details)	9 Months Ended
	Jan. 31, 2016	Jan. 31, 2015
Principal collected as a percent of average finance receivables	40.60%	41.90%
Average down-payment percentage	6.10%	6.20%
Average originating contract term (in months)	2 years 138 days	2 years 105 days

X

- Definition

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

- Definition

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

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:	instant