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Note C - Finance Receivables, Net - Credit Quality Information for Finance Receivables (Details) - USD ($) $ in Thousands | Oct. 31, 2018 | Apr. 30, 2018 | Oct. 31, 2017
--- | --- | --- | ---
Current, Principal Balance | $ 426,905 | $ 424,511 | $ 381,557
Current, Percent of Portfolio | 79.67% | 84.67% | 77.48%
3 - 29 days past due, Principal Balance | $ 90,726 | $ 59,544 | $ 90,776
3 - 29 days past due, Percent of Portfolio | 16.93% | 11.87% | 18.43%
30 - 60 days past due, Principal Balance | $ 14,015 | $ 12,448 | $ 14,485
30 - 60 days past due, Percent of Portfolio | 2.62% | 2.48% | 2.94%
61 - 90 days past due, Principal Balance | $ 2,684 | $ 3,331 | $ 3,832
61 - 90 days past due, Percent of Portfolio | 0.50% | 0.66% | 0.78%
> 90 days past due, Principal Balance | $ 1,512 | $ 1,604 | $ 1,845
> 90 days past due, Percent of Portfolio | 0.28% | 0.32% | 0.37%
Total, Principal Balance | $ 535,842 | $ 501,438 | $ 492,495
Total, Percent of Portfolio | 100.00% | 100.00% | 100.00%

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- Definition The principal balance of finance receivables after deducting unearned finance charges from gross contract amount. + References No definition available. + Details
Name: | crmt_FinanceReceivablePrincipalBalance
Namespace Prefix: | crmt_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Financing receivable, 30 to 60 days past due, percent of portfolio. + References No definition available. + Details
Name: | crmt_FinancingReceivable30To60DaysPastDuePercentOfPortfolio
Namespace Prefix: | crmt_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- Definition Financing receivable, 3 to 29 days past due, percent of portfolio. + References No definition available. + Details
Name: | crmt_FinancingReceivable3To29DaysPastDuePercentOfPortfolio
Namespace Prefix: | crmt_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- Definition Financing receivable, 61 to 90 days past due, percent of portfolio. + References No definition available. + Details
Name: | crmt_FinancingReceivable61To90DaysPastDuePercentOfPortfolio
Namespace Prefix: | crmt_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- Definition Financing receivable, current, percent of portfolio. + References No definition available. + Details
Name: | crmt_FinancingReceivableCurrentPercentOfPortfolio
Namespace Prefix: | crmt_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- Definition Financing receivable, greater than 90 days past due, percent of portfolio. + References No definition available. + Details
Name: | crmt_FinancingReceivableGreaterThan90DaysPastDuePercentOfPortfolio
Namespace Prefix: | crmt_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- Definition Financing receivable, percent of portfolio. + References No definition available. + Details
Name: | crmt_FinancingReceivablePercentOfPortfolio
Namespace Prefix: | crmt_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- Definition Financing receivables that are less than 61 days past due but more than 29 days past due. + References No definition available. + Details
Name: | crmt_FinancingReceivableRecordedInvestment30To60DaysPastDue
Namespace Prefix: | crmt_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Financing receivables that are less than 3-29 days past due. + References No definition available. + Details
Name: | crmt_FinancingReceivableRecordedInvestment3To29DaysPastDue
Namespace Prefix: | crmt_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Financing receivables that are less than 91 days past due but more than 60 days past due. + References No definition available. + Details
Name: | crmt_FinancingReceivableRecordedInvestment61To90DaysPastDue
Namespace Prefix: | crmt_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Financing receivables that are greater than 90 days past due. + References No definition available. + Details
Name: | crmt_FinancingReceivableRecordedInvestmentGreaterThan90DaysPastDue
Namespace Prefix: | crmt_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Financing receivables that are current. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7A -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953401-111524 + Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant