XML 36 R22.htm IDEA: XBRL DOCUMENT
v3.21.1

Description of Business | 9 Months Ended
--- | ---
Sep. 30, 2020
Description Of Business [Abstract] |
Percentage of Consumer Loans Assigned with FICO Score of Less Than 650 or No FICO Score | The following table shows the percentage of Consumer Loans assigned to us with either FICO® scores below 650 or no FICO® scores:
|  | For the Three Months Ended March 31, |  |
Consumer Loan Assignment Volume |  | 2021 |  | 2020 |  |  |  |
Percentage of total unit volume with either FICO® scores below 650 or no FICO® scores |  | 94.3 | % |  | 96.5 | % |  |  |  |
Schedule of Percentage of Consumer Loans Assigned Based on Unit Volumes | The following table shows the percentage of Consumer Loans assigned to us as Dealer Loans and Purchased Loans for each of the last five quarters:
|  | Unit Volume |  | Dollar Volume (1)
Three Months Ended |  | Dealer Loans |  | Purchased Loans |  | Dealer Loans |  | Purchased Loans
March 31, 2020 |  | 64.9 | % |  | 35.1 | % |  | 60.5 | % |  | 39.5 | %
June 30, 2020 |  | 62.5 | % |  | 37.5 | % |  | 59.1 | % |  | 40.9 | %
September 30, 2020 |  | 64.1 | % |  | 35.9 | % |  | 60.9 | % |  | 39.1 | %
December 31, 2020 |  | 65.3 | % |  | 34.7 | % |  | 62.7 | % |  | 37.3 | %
March 31, 2021 |  | 65.4 | % |  | 34.6 | % |  | 62.7 | % |  | 37.3 | %
(1)Represents advances paid to Dealers on Consumer Loans assigned under our Portfolio Program and one-time payments made to Dealers to purchase Consumer Loans assigned under our Purchase Program. Payments of Dealer Holdback (as defined below) and accelerated Dealer Holdback are not included.

X
- Definition Description Of Business [Abstract] + References No definition available. + Details
Name: | cacc_DescriptionOfBusinessAbstract
Namespace Prefix: | cacc_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Schedule Of Percentage Of Consumer Loans Assigned Based On Unit Volumes Table Text Block + References No definition available. + Details
Name: | cacc_ScheduleOfPercentageOfConsumerLoansAssignedBasedOnUnitVolumesTableTextBlock
Namespace Prefix: | cacc_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of financing receivables by credit quality indicator. The credit quality indicator is a statistic about the credit quality of financing receivables. Examples include, but not limited to, consumer credit risk scores, credit-rating-agency ratings, an entity's internal credit risk grades, loan-to-value ratios, collateral, collection experience and other internal metrics. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919230-210447 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 29 -URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953659-111524 + Details
Name: | us-gaap_FinancingReceivableCreditQualityIndicatorsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration