XML 21 R57.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Derivative and Hedging Instruments (Schedule of Terms of Interest Rate Cap Agreements) (Details) (USD $) | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2014 | Dec. 31, 2013
Derivative [Line Items] |  |  |  |
Interest rate caps, fair value of less than $0.1 million | $ 100,000 |  | $ 100,000 |
Warehouse Facility II [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Debt facility financing amount | 325,000,000 | [1] |  |
Warehouse Facility II [Member] | 5.50% Cap Interest Rate [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Debt facility financing amount | 325,000,000 |  | 325,000,000 |
Start | 06/2013 |  | 06/2013 |
End | 12/2014 |  | 12/2014 |
Notional | 325,000,000 |  | 325,000,000 |
Cap Interest Rate | 5.50% | [2] | 5.50% | [2]
Warehouse Facility IV [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Debt facility financing amount | 75,000,000 | [1] |  |
Warehouse Facility IV [Member] | 5.50% Cap Interest Rate [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Debt facility financing amount | 75,000,000 |  | 75,000,000 |
Start | 08/2011 |  | 08/2011 |
End | 09/2015 |  | 09/2015 |
Notional | 41,700,000 |  | 75,000,000 |
Cap Interest Rate | 5.50% | [2] | 5.50% | [2]
Warehouse Facility IV Member Starting March 2014 [Member] | 5.50% Cap Interest Rate [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Debt facility financing amount | 75,000,000 |  |  |
Start | 03/2014 |  |  |
End | 03/2017 |  |  |
Notional | 33,300,000 |  |  |
Cap Interest Rate | 5.50% | [2] |  |
Warehouse Facility V [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Debt facility financing amount | 75,000,000 | [1] |  |
Warehouse Facility V [Member] | 5.00% Cap Interest Rate [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Debt facility financing amount |  |  | 75,000,000 |
Start |  |  | 06/2012 |
End |  |  | 07/2015 |
Notional |  |  | $ 56,300,000 |
Cap Interest Rate |  |  | 5.00% | [2]
[1] | Financing made available only to a specified subsidiary of the Company.
[2] | Rate excludes the spread over the LIBOR rate or the commercial paper rate, as applicable.

X
- Definition Interest Rate Contracts Inception Date + References No definition available. + Details
Name: | cacc_InterestRateContractsInceptionDate
Namespace Prefix: | cacc_
Data Type: | us-types:dateStringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Interest Rate Contracts Maturity Date + References No definition available. + Details
Name: | cacc_InterestRateContractsMaturityDate
Namespace Prefix: | cacc_
Data Type: | us-types:dateStringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
Name: | invest_DerivativeNotionalAmount
Namespace Prefix: | invest_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | instant

X
- Definition Face (par) amount of debt instrument at time of issuance. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6584090&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 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, elected not to be offset against an obligation to return collateral under a master netting arrangement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=20225523&loc=SL20225862-175312 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=7476318&loc=d3e41678-113959 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=28370219&loc=SL20226011-175313 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=28370219&loc=SL20226006-175313 + Details
Name: | us-gaap_DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_DerivativeLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration