XML 35 R79.htm IDEA: XBRL DOCUMENT
v3.19.3.a.u2

Derivative And Hedging Instruments (Schedule Of Terms Of Interest Rate Cap Agreements) (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2019 | Dec. 31, 2018
Derivative [Line Items] |  |  |  |
Document Period End Date |  | Dec. 31, 2019 |  |
Interest rate swap fair value |  | $ 0.1 |  | $ 0.0
Warehouse Facility II [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Debt financing amount |  | 400.0 | [1] | 400.0
Warehouse Facility II [Member] | 5.50% Cap Interest Rate [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative, Notional Amount |  | $ 205.0 |  | $ 205.0
Cap Interest Rate | [2] | 5.50% |  | 5.50%
Warehouse Facility IV [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Debt financing amount |  | $ 300.0 | [1] | $ 250.0
Derivative, Notional Amount |  | 300.0 |  | 250.0
Warehouse Facility IV [Member] | 5.50% Cap Interest Rate [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative, Notional Amount |  |  |  | $ 25.0
Cap Interest Rate | [2] |  |  | 5.50%
Warehouse Facility IV [Member] | 6.50% Cap Interest Rate [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative, Notional Amount |  | $ 100.0 |  | $ 75.0
Cap Interest Rate | [2] | 6.50% |  | 6.50%
Warehouse Facility IV [Member] | Additional 6.50% Cap Interest Rate [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative, Notional Amount |  | $ 150.0 |  | $ 150.0
Cap Interest Rate | [2] | 6.50% |  | 6.50%
Warehouse Facility IV [Member] | Second Additional 6.50% Cap Interest Rate [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative, Notional Amount |  | $ 50.0 |  |
Cap Interest Rate | [2] | 6.50% |  |
Warehouse Facility V [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Debt financing amount |  | $ 100.0 | [1] | $ 100.0
Warehouse Facility V [Member] | 6.50% Cap Interest Rate [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative, Notional Amount |  | $ 75.0 |  | $ 75.0
Cap Interest Rate | [2] | 6.50% |  | 6.50%
Term ABS 2016-1 [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Debt financing amount |  |  |  | $ 125.3
Term ABS 2016-1 [Member] | 5.00% Cap Interest Rate [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative, Notional Amount |  |  |  | $ 64.2
Cap Interest Rate | [2] |  |  | 5.00%
Warehouse Facility VII [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Debt financing amount |  | $ 150.0 | [1] | $ 150.0
Warehouse Facility VII [Member] | 5.50% Cap Interest Rate [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative, Notional Amount |  | $ 143.8 |  | $ 150.0
Cap Interest Rate | [2] | 5.50% |  | 5.50%
Warehouse Facility VIII [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Debt financing amount | [1] | $ 200.0 |  |
Warehouse Facility VIII [Member] | 5.50% Cap Interest Rate [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative, Notional Amount |  | $ 200.0 |  |
Cap Interest Rate | [2] | 5.50% |  |
[1] | Interest rate cap agreements are in place to limit the exposure to increasing interest rates.
[2] | Rate excludes the spread over the corresponding LIBOR or commercial paper rate.

X
- Definition The end date of the period reflected on the cover page if a periodic report. For all other reports and registration statements containing historical data, it is the date up through which that historical data is presented. If there is no historical data in the report, use the filing date. The format of the date is CCYY-MM-DD. + References No definition available. + Details
Name: | dei_DocumentPeriodEndDate
Namespace Prefix: | dei_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Definition Face (par) amount of debt instrument at time of issuance. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28551-108399 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400 + Details
Name: | us-gaap_DebtInstrumentFaceAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Cap rate on an interest rate derivative such as an interest rate cap or collar. If market rates exceed the cap rate, a payment or receipt is triggered on the contract. + References No definition available. + Details
Name: | us-gaap_DerivativeCapInterestRate
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Fair value, after offset of derivative liability, of financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, before offset against an obligation to return collateral under a master netting arrangement. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226008-175313 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226006-175313 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=109980867&loc=d3e41678-113959 + Details
Name: | us-gaap_DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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_DerivativeLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Nominal or face amount used to calculate payment on derivative. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5580258-113959 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5579245-113959 + Details
Name: | us-gaap_DerivativeNotionalAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_DebtInstrumentAxis=cacc_WarehouseFacilityIIMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=cacc_FivePointFivePercentCapInterestRateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=cacc_WarehouseFacilityIVMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=cacc_SixPointFivePercentCapInterestRateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=cacc_AdditionalSixPointFivePercentCapInterestRateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=cacc_SecondAdditionalSixPointFivePercentCapInterestRateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=cacc_WarehouseFacilityVMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=cacc_TermABS20161Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=cacc_FivePercentCapInterestRateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=cacc_WarehouseFacilityVIIMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=cacc_WarehouseFacilityVIIIMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |