XML 52 R24.htm IDEA: XBRL DOCUMENT v2.4.0.8

Description Of Business (Tables)

3 Months Ended

Mar. 31, 2014

Description Of Business [Abstract]

Schedule Of Percentage Of Consumer Loans Assigned Based On Unit Volumes

Quarter Ended		Portfolio Program			Purchase Program
March 31, 2013		94.4	%		5.6	%
June 30, 2013		93.9	%		6.1	%
September 30, 2013		92.9	%		7.1	%
December 31, 2013		92.4	%		7.6	%
March 31, 2014		91.7	%		8.3	%

X

- 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