Represents the percentage of stock options immediately vested on change of control.

No definition available.

Name:	cprt_PercentageOfStockOptionsImmediatelyVestedOnChangeOfControl
Namespace Prefix:	cprt_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the percentage of stock options immediately vested on termination of executive.

+ References

No definition available.

+ Details

Name:	cprt_PercentageOfStockOptionsImmediatelyVestedOnTerminationOfExecutive
Namespace Prefix:	cprt_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the percentage of stock options exercised as of specified date.

+ References

No definition available.

+ Details

Name:	cprt_PercentageOfStockOptionsVestedAsOfSpecifiedDate
Namespace Prefix:	cprt_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Share based compensation arrangement by share based payment award options in money number.

+ References

No definition available.

+ Details

Name:	cprt_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsInMoneyNumber
Namespace Prefix:	cprt_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	cprt_StockBasedCompensationTextualAbstract
Namespace Prefix:	cprt_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Stock option value at the date of grant.

+ References

No definition available.

+ Details

Name:	cprt_StockOptionValueAtTheDateOfGrant
Namespace Prefix:	cprt_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents the term for granting stock in excess of cash salary or bonus in excess of dollar one.

+ References

No definition available.

+ Details

Name:	cprt_TermForGrantingSharesInLieuOfCashSalaryOrBonusCompensationExceedingDollarOnePerannum
Namespace Prefix:	cprt_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Description of the deferred compensation arrangement, including fixed amounts and determinable awards, or the method for determining payments and awards, the timing of such payments and awards, and any requisite service or performance criteria, as of the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 710

-SubTopic 10

-Section 55

-Paragraph 7

-URI http://asc.fasb.org/extlink&oid=6409961&loc=d3e20487-108367

+ Details

Name:	us-gaap_DeferredCompensationArrangementWithIndividualDescription
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The per share price that the individual must pay to acquire shares under the deferred compensation arrangement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

+ Details

Name:	us-gaap_DeferredCompensationArrangementWithIndividualExercisePrice
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

- Definition

The carrying amount of the liability as of the balance sheet date to an individual under a deferred compensation arrangement. This amount may be the result of periodic accruals made over the period of active employment, or reflect termination benefits resulting contractual terms or a death benefit.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 710

-SubTopic 10

-Section 30

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6409875&loc=d3e20015-108363

+ Details

Name:	us-gaap_DeferredCompensationArrangementWithIndividualRecordedLiability
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Minimum period the individual is required to perform services to be fully vested under the deferred compensation arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 710

-SubTopic 10

-Section 55

-Paragraph 7

-URI http://asc.fasb.org/extlink&oid=6409961&loc=d3e20487-108367

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

+ Details

Name:	us-gaap_DeferredCompensationArrangementWithIndividualRequisiteServicePeriod1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

The maximum number of shares authorized for issuance under the deferred compensation arrangement as of the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (a)(3)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

+ Details

Name:	us-gaap_DeferredCompensationArrangementWithIndividualSharesAuthorizedForIssuance
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	us-gaap_TitleOfIndividualAxis=us-gaap_ChiefExecutiveOfficerMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_TitleOfIndividualAxis=us-gaap_PresidentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Stock-based Payment Compensation (Details Textual) (USD $) In Millions, except Share data, unless otherwise specified	1 Months Ended
	Oct. 31, 2013	Jan. 31, 2015	Jan. 31, 2014
Stock Based Compensation (Textual)
Shares available for calculating intrinsic value (in shares)		18,751,997
Nonqualified stock options to purchase of shares, exercise price	$ 35.62
Deferred compensation arrangement with individual - requisite service period	5 years
Deferred compensation arrangement with individual, description	Each option will become fully vested, assuming continued service on April 15, 2019 and December 16, 2018.
Term for not granting cash salary or bonus compensation in excess of $ 1.00 per year	5 years
Percentage of stock options which would get immediately vested on termination of executive	100.00%
Percentage of stock options which would get immediately vested on change of control	100.00%
Value of option at the date of grant	$ 11.43cprt_StockOptionValueAtTheDateOfGrant
Total compensation expense to be recognized per grant	$ 40.0	$ 3.8	$ 0.6
A. Jayson Adair, the Chief Executive Officer
Stock Based Compensation (Textual)
Nonqualified stock options to purchase of shares	2,000,000
Percentage of total aggregate options vested	20.00%
Vincent W. Mitz, the President
Stock Based Compensation (Textual)
Nonqualified stock options to purchase of shares	1,500,000
Percentage of total aggregate options vested	20.00%