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Income Taxes (Details) (USD $) In Millions, unless otherwise specified | 6 Months Ended
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Jan. 31, 2015 | Jan. 31, 2014
Income Taxes [Abstract] |  |
Gross unrecognized tax benefit | $ 25.5 us-gaap_UnrecognizedTaxBenefits |
Interest and penalties related to income tax | $ 0.8 us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense | $ 0.8 us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense
Tax benefits recognized provided percentage of likelihood of realization is more than | 50.00%cprt_TaxBenefitsRecognizedProvidedPercentageOfLikelihoodOfRealizationMoreThan |

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- Definition Represents the tax benefits recognized provided percentage of likelihood of realization is more than during the period. + References No definition available. + Details
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- Details
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- Definition Amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Unrecognized Tax Benefit -URI http://asc.fasb.org/extlink&oid=6527854 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6907707&loc=SL6600010-109319 + Details
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- Definition Amount of expense for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32718-109319 + Details
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