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Derivative Financial Instruments and Hedging Activities (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Derivative Instruments and Hedging Activities Fair Value [Abstract] |  |  |
CPT Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net | $ 1.3 | $ 1.3 | $ 1.3

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- Definition CPT Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net + References No definition available. + Details
Name: | cpt_CPTDerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet
Namespace Prefix: | cpt_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Derivative Instruments and Hedging Activities Fair Value [Abstract] + References No definition available. + Details
Name: | cpt_DerivativeInstrumentsandHedgingActivitiesFairValueAbstract
Namespace Prefix: | cpt_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration