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Finance Receivables, Net - Financing Receivables Analysis (Details) - USD ($) $ in Thousands | 9 Months Ended
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Jan. 31, 2025 | Jan. 31, 2024
Receivables [Abstract] |  |
Average total collected per active customer per month | $ 563 | $ 536
Principal collected as a percent of average finance receivables | 23.10% | 22.70%
Average down-payment percentage | 5.20% | 5.00%
Average originating contract term (in months) | 44 months 12 days | 44 months
Portfolio weighted average contract term, including modifications (in months) | 48 months 9 days | 47 months 18 days

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- Definition Average amount of collected balance per customer per month. + References No definition available. + Details
Name: | crmt_AverageCollectedAmountPerCustomerPerMonth
Namespace Prefix: | crmt_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Average down-payment percentage + References No definition available. + Details
Name: | crmt_AverageDownpaymentPercentage
Namespace Prefix: | crmt_
Data Type: | dtr-types1:percentItemType
Balance Type: | na
Period Type: | duration

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- 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

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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

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- 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: | dtr-types1:percentItemType
Balance Type: | na
Period Type: | instant

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- References No definition available. + Details
Name: | us-gaap_ReceivablesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration