XML 72 R57.htm IDEA: XBRL DOCUMENT
v3.6.0.2

Loans Receivable (Schedule Of Consumer Loans Forecasted Collection Percentage) (Details) | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2009 | Dec. 31, 2008 | Dec. 31, 2007
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Loans Originating In 2007 [Member] |  |  |  |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |  |  |  |
Forecasted Collection Percentage | [1] | 68.20% | 68.10% | 68.00% |  |  |  |  |  |  |
Initial Forecasted Collection Percentage | [1] |  |  |  |  |  |  |  |  |  | 70.70%
Current Forecast Variance |  |  | 0.10% | 0.20% |  |  |  |  |  |  |
Current Forecast Variance From Initial Forecast |  |  |  |  |  |  |  |  |  |  | (2.50%)
Loans Originating In 2008 [Member] |  |  |  |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |  |  |  |
Forecasted Collection Percentage | [1] | 70.40% | 70.30% | 70.30% |  |  |  |  |  |  |
Initial Forecasted Collection Percentage | [1] |  |  |  |  |  |  |  |  | 69.70% |
Current Forecast Variance |  |  | 0.10% | 0.10% |  |  |  |  |  |  |
Current Forecast Variance From Initial Forecast |  |  |  |  |  |  |  |  |  | 0.70% |
Loans Originating In 2009 [Member] |  |  |  |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |  |  |  |
Forecasted Collection Percentage | [1] | 79.40% | 79.40% | 79.40% |  |  |  |  |  |  |
Initial Forecasted Collection Percentage | [1] |  |  |  |  |  |  |  | 71.90% |  |
Current Forecast Variance |  |  | 0.00% | 0.00% |  |  |  |  |  |  |
Current Forecast Variance From Initial Forecast |  |  |  |  |  |  |  |  | 7.50% |  |
Loans Originating In 2010 [Member] |  |  |  |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |  |  |  |
Forecasted Collection Percentage | [1] | 77.60% | 77.40% | 77.20% |  |  |  |  |  |  |
Initial Forecasted Collection Percentage | [1] |  |  |  |  |  |  | 73.60% |  |  |
Current Forecast Variance |  |  | 0.20% | 0.40% |  |  |  |  |  |  |
Current Forecast Variance From Initial Forecast |  |  |  |  |  |  |  | 4.00% |  |  |
Loans Originating In 2011 [Member] |  |  |  |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |  |  |  |
Forecasted Collection Percentage | [1] | 74.70% | 74.20% | 74.00% |  |  |  |  |  |  |
Initial Forecasted Collection Percentage | [1] |  |  |  |  |  | 72.50% |  |  |  |
Current Forecast Variance |  |  | 0.50% | 0.70% |  |  |  |  |  |  |
Current Forecast Variance From Initial Forecast |  |  |  |  |  |  | 2.20% |  |  |  |
Loans Originating In 2012 [Member] |  |  |  |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |  |  |  |
Forecasted Collection Percentage | [1] | 73.70% | 73.20% | 73.40% |  |  |  |  |  |  |
Initial Forecasted Collection Percentage | [1] |  |  |  |  | 71.40% |  |  |  |  |
Current Forecast Variance |  |  | 0.50% | 0.30% |  |  |  |  |  |  |
Current Forecast Variance From Initial Forecast |  |  |  |  |  | 2.30% |  |  |  |  |
Loans Originating In 2013 [Member] |  |  |  |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |  |  |  |
Forecasted Collection Percentage | [1] | 73.40% | 73.40% | 0.00% |  |  |  |  |  |  |
Initial Forecasted Collection Percentage | [1] |  |  |  | 72.00% |  |  |  |  |  |
Current Forecast Variance |  |  | 0.00% | 0.00% |  |  |  |  |  |  |
Current Forecast Variance From Initial Forecast |  |  |  |  | 1.40% |  |  |  |  |  |
Loans Originating In 2014 [Member] |  |  |  |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |  |  |  |
Forecasted Collection Percentage | [1] | 71.80% | 0.00% | 100.00% |  |  |  |  |  |  |
Initial Forecasted Collection Percentage | [1] |  |  | 71.80% |  |  |  |  |  |  |
Current Forecast Variance |  |  | 0.00% | 0.00% |  |  |  |  |  |  |
Current Forecast Variance From Initial Forecast |  |  |  | 0.00% |  |  |  |  |  |  |
Loans Originating in 2015 [Member] |  |  |  |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |  |  |  |
Forecasted Collection Percentage | [1] | 66.10% | 0.00% |  |  |  |  |  |  |  |
Initial Forecasted Collection Percentage | [1] |  | 67.70% |  |  |  |  |  |  |  |
Current Forecast Variance |  |  | 0.00% |  |  |  |  |  |  |  |
Current Forecast Variance From Initial Forecast |  | (0.30%) | (1.60%) |  |  |  |  |  |  |  |
Loans Originating in 2016 [Member] |  |  |  |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |  |  |  |
Forecasted Collection Percentage | [1] | 65.10% |  |  |  |  |  |  |  |  |
Initial Forecasted Collection Percentage | [1] | 65.40% |  |  |  |  |  |  |  |  |
[1] | Represents the total forecasted collections we expect to collect on the Consumer Loans as a percentage of the repayments that we were contractually owed on the Consumer Loans at the time of assignment. Contractual repayments include both principal and interest. Forecasted collection rates are negatively impacted by canceled Consumer Loans as the contractual amount owed is not removed from the denominator for purposes of computing forecasted collection rates in the table.

X
- Definition Loans Receivable Forecasted Collection Percentage + References No definition available. + Details
Name: | cacc_LoansReceivableForecastedCollectionPercentage
Namespace Prefix: | cacc_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Loans Receivable Initial Forecasted Collection Percentage + References No definition available. + Details
Name: | cacc_LoansReceivableInitialForecastedCollectionPercentage
Namespace Prefix: | cacc_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Loans Receivable Variance In Forecasted Collection Percentage + References No definition available. + Details
Name: | cacc_LoansReceivableVarianceInForecastedCollectionPercentage
Namespace Prefix: | cacc_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Loans Receivable Variance In Initial Forecasted Collection Percentage + References No definition available. + Details
Name: | cacc_LoansReceivableVarianceInInitialForecastedCollectionPercentage
Namespace Prefix: | cacc_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_AccountsNotesAndLoansReceivableLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | cacc_LoansAxis=cacc_LoansOriginatingIn2007Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | cacc_LoansAxis=cacc_LoansOriginatingIn2008Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | cacc_LoansAxis=cacc_LoansOriginatingIn2009Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | cacc_LoansAxis=cacc_LoansOriginatingIn2010Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | cacc_LoansAxis=cacc_LoansOriginatingIn2011Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | cacc_LoansAxis=cacc_LoansOriginatingIn2012Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | cacc_LoansAxis=cacc_LoansOriginatingIn2013Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | cacc_LoansAxis=cacc_LoansOriginatingIn2014Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | cacc_LoansAxis=cacc_LoansOriginatingin2015Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | cacc_LoansAxis=cacc_LoansOriginatingin2016Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |