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Restructuring (Details Textual) (USD $) In Millions, unless otherwise specified | 6 Months Ended
--- | ---
Jan. 31, 2014 | Jan. 31, 2013
Restructuring and Related Activities (Details Textual) [Abstract] |  |
Additional depreciation expenses recognized during current period | $ 2.8 | $ 2.7
Data Centers |  |
Restructuring and Related Activities (Details Textual) [Abstract] |  |
Average useful lives of data center | 60 months |
Revised average useful lives of data center | 45 months |

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- Definition This element represents the amount of additional depreciation expenses recognized during the period. + References No definition available. + Details
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Balance Type: | debit
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- Definition Describes the revised periods of time over which an entity anticipates to receive utility from its property, plant and equipment (that is, the periods of time over which an entity allocates the initial cost of its property, plant and equipment). + References No definition available. + Details
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Namespace Prefix: | cprt_
Data Type: | xbrli:stringItemType
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Period Type: | duration

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- Details
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- Definition Describes the periods of time over which an entity anticipates to receive utility from its property, plant and equipment (that is, the periods of time over which an entity allocates the initial cost of its property, plant and equipment). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6367646&loc=d3e18780-107790 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -URI http://asc.fasb.org/subtopic&trid=2155824 + Details
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