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Summary Of Significant Accounting Policies (Expected Useful Lives Of Depreciable Property) (Details) | 9 Months Ended
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Sep. 30, 2013
Intangible assets/liabilities (in-place leases and below market leases) | underlying lease term
Minimum [Member] | Buildings And Improvements [Member] |
Estimated Useful Life (in years) | 5 years
Minimum [Member] | Furniture, Fixtures, Equipment, And Other [Member] |
Estimated Useful Life (in years) | 3 years
Maximum [Member] | Buildings And Improvements [Member] |
Estimated Useful Life (in years) | 35 years
Maximum [Member] | Furniture, Fixtures, Equipment, And Other [Member] |
Estimated Useful Life (in years) | 20 years

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- Definition Expected useful lives of intangible assets related to in-place leases and above and below market leases. + References No definition available. + Details
Name: | cpt_ExpectedUsefulLivesOfIntangibleAssetsRelatedToInPlaceLeasesAndAboveAndBelowMarketLeases
Namespace Prefix: | cpt_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. + References No definition available. + Details
Name: | us-gaap_PropertyPlantAndEquipmentUsefulLife
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration