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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 cprt_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsInMoneyNumber |
Nonqualified stock options to purchase of shares, exercise price | $ 35.62 us-gaap_DeferredCompensationArrangementWithIndividualExercisePrice |  |
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%cprt_PercentageOfStockOptionsImmediatelyVestedOnTerminationOfExecutive |  |
Percentage of stock options which would get immediately vested on change of control | 100.00%cprt_PercentageOfStockOptionsImmediatelyVestedOnChangeOfControl |  |
Value of option at the date of grant | $ 11.43 cprt_StockOptionValueAtTheDateOfGrant |  |
Total compensation expense to be recognized per grant | $ 40.0 us-gaap_DeferredCompensationArrangementWithIndividualRecordedLiability | $ 3.8 us-gaap_DeferredCompensationArrangementWithIndividualRecordedLiability | $ 0.6 us-gaap_DeferredCompensationArrangementWithIndividualRecordedLiability
A. Jayson Adair, the Chief Executive Officer |  |  |
Stock Based Compensation (Textual) |  |  |
Nonqualified stock options to purchase of shares | 2,000,000 us-gaap_DeferredCompensationArrangementWithIndividualSharesAuthorizedForIssuance / us-gaap_TitleOfIndividualAxis = us-gaap_ChiefExecutiveOfficerMember |  |
Percentage of total aggregate options vested | 20.00%cprt_PercentageOfStockOptionsVestedAsOfSpecifiedDate / us-gaap_TitleOfIndividualAxis = us-gaap_ChiefExecutiveOfficerMember |  |
Vincent W. Mitz, the President |  |  |
Stock Based Compensation (Textual) |  |  |
Nonqualified stock options to purchase of shares | 1,500,000 us-gaap_DeferredCompensationArrangementWithIndividualSharesAuthorizedForIssuance / us-gaap_TitleOfIndividualAxis = us-gaap_PresidentMember |  |
Percentage of total aggregate options vested | 20.00%cprt_PercentageOfStockOptionsVestedAsOfSpecifiedDate / us-gaap_TitleOfIndividualAxis = us-gaap_PresidentMember |  |

X
- Definition Represents the percentage of stock options immediately vested on change of control. + References No definition available. + Details
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- Definition Represents the percentage of stock options immediately vested on termination of executive. + References No definition available. + Details
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- Definition Represents the percentage of stock options exercised as of specified date. + References No definition available. + Details
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- Definition Share based compensation arrangement by share based payment award options in money number. + References No definition available. + Details
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- Definition Stock option value at the date of grant. + References No definition available. + Details
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- Definition Represents the term for granting stock in excess of cash salary or bonus in excess of dollar one. + References No definition available. + Details
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- 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
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- 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
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- 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
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- 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
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- 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
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