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Note C - Finance Receivables (Detail) - Credit quality information for finance receivables (USD $) | Jan. 31, 2013 | Apr. 30, 2012 | Jan. 31, 2012
--- | --- | --- | ---
Current (in Dollars) | $ 287,553,000 | $ 262,325,000 | $ 249,880,000
Current | 79.01% | 82.77% | 77.52%
3 - 29 days past due (in Dollars) | 54,358,000 | 41,508,000 | 57,227,000
3 - 29 days past due | 14.94% | 13.10% | 17.75%
30 - 60 days past due (in Dollars) | 14,112,000 | 8,818,000 | 11,096,000
30 - 60 days past due | 3.88% | 2.78% | 3.44%
61 - 90 days past due (in Dollars) | 5,494,000 | 3,627,000 | 3,172,000
61 - 90 days past due | 1.51% | 1.14% | 0.98%
> 90 days past due (in Dollars) | 2,401,000 | 656,000 | 978,000
> 90 days past due | 0.66% | 0.21% | 0.30%
Total (in Dollars) | $ 363,918,000 | $ 316,934,000 | $ 322,353,000
Total | 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 greater than 90 days past due. + References No definition available. + Details
Name: | crmt_FinancingReceivableRecordedInvestmenGreaterThan90DaysPastDue
Namespace Prefix: | crmt_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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 current. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7A -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953401-111524 + Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant