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Description of Business (Details) | Mar. 31, 2022
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Business Acquisition [Line Items] |
Number of multifamily properties owned, operated, or under development | 175
Total number of apartment homes in multifamily properties | 59,894
Number of multifamily properties under development | 5
Total Number of apartment homes in multifamily properties upon completion of development | 1,839

X
- Definition The total number of real estate properties the company owned interests in, operated, or were developing as of the balance sheet date. + References No definition available. + Details
Name: | cpt_NumberOfMultifamilyCommunities
Namespace Prefix: | cpt_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition The number of real estate properties under development the company owned interests in or fully owned as of the balance sheet date. + References No definition available. + Details
Name: | cpt_NumberOfMultifamilyPropertiesUnderDevelopment
Namespace Prefix: | cpt_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition The total number of units in real estate properties the company owned interests in, operated, or were developing as of the balance sheet date. + References No definition available. + Details
Name: | cpt_TotalNumberOfApartmentHomesInMultifamilyCommunities
Namespace Prefix: | cpt_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition The number of units in the real estate properties under development the company owned interests in or fully owned as of the balance sheet date which will be added upon completion of development. + References No definition available. + Details
Name: | cpt_TotalNumberOfApartmentHomesInMultifamilyPropertiesUponCompletionOfDevelopment
Namespace Prefix: | cpt_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_BusinessAcquisitionLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration