Represents the maximum amount of consideration available for permitted acquisitions as part of a debt covenant.

No definition available.

Name:	crmt_DebtInstrumentCovenantPermittedAcquisitionsAnnualConsiderationAmount
Namespace Prefix:	crmt_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility with an accordion feature.

+ References

No definition available.

+ Details

Name:	crmt_LineOfCreditFacilityMaximumBorrowingCapacityAccordionFeature
Namespace Prefix:	crmt_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Percent applicable to unused line categorized as a fee.

+ References

No definition available.

+ Details

Name:	crmt_LineOfCreditUnusedLineFeePercent
Namespace Prefix:	crmt_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1

+ Details

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LineOfCreditFacilityAxis=crmt_BmoHarrisBankMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_BaseRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=crmt_DailyRevolvingLineOfCreditMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Note M - Subsequent Events (Details Textual) - BMO Harris Bank [Member] - USD ($) $ in Millions	Feb. 28, 2024	Jan. 31, 2024	Sep. 29, 2019
Revolving Credit Facility [Member]
Line of Credit Facility, Maximum Borrowing Capacity			$ 600
Line of Credit, Unused Line Fee, Percent		0.375%
Debt Instrument, Covenant, Permitted Acquisitions Annual Consideration Amount		$ 10
Revolving Credit Facility [Member] \| Subsequent Event [Member]
Line of Credit Facility, Maximum Borrowing Capacity	$ 340
Line of Credit Facility, Maximum Borrowing Capacity, Accordion Feature	$ 100
Line of Credit, Unused Line Fee, Percent	0.50%
Debt Instrument, Covenant, Permitted Acquisitions Annual Consideration Amount	$ 20
Revolving Credit Facility [Member] \| Subsequent Event [Member] \| Base Rate [Member]
Debt Instrument, Basis Spread on Variable Rate	1.00%
Revolving Credit Facility [Member] \| Subsequent Event [Member] \| Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Debt Instrument, Basis Spread on Variable Rate	3.50%
Daily Revolving Line of Credit [Member] \| Subsequent Event [Member]
Line of Credit, Unused Line Fee, Percent	0.25%