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Summary of Significant Accounting Policies and Recent Accounting Pronouncements (Expected Useful Lives Of Depreciable Property) (Details) | 9 Months Ended
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Sep. 30, 2019
Intangible assets/liabilities (in-place leases and above 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
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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
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Namespace Prefix: | us-gaap_
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Balance Type: | na
Period Type: | duration

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |