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Operating Partnerships Operating Partnerships (Details) (USD $) Share data in Millions, except Per Share data, unless otherwise specified | 12 Months Ended | 1 Months Ended
--- | --- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 | Feb. 29, 2012
Write off of original issuance costs of redeemed perpetual preferred units | $ 0 cpt_WriteOffOfOriginalIssuanceCostsOfRedeemedPerpetualPreferredUnits | $ 0 cpt_WriteOffOfOriginalIssuanceCostsOfRedeemedPerpetualPreferredUnits | $ 2,075,000 cpt_WriteOffOfOriginalIssuanceCostsOfRedeemedPerpetualPreferredUnits |
Camden Operating L P [Member] |  |  |  |
Percentage Of Real Estate Properties Held With Operating Partnership | 8.00%cpt_PercentageOfRealEstatePropertiesHeldWithOperatingPartnership / dei_LegalEntityAxis = cpt_CamdenOperatingLPMember |  |  |
Units of Partnership Interest, Amount | 11.9 us-gaap_UnitsOfPartnershipInterestAmount / dei_LegalEntityAxis = cpt_CamdenOperatingLPMember |  |  |
Limited Liability Company (LLC) or Limited Partnership (LP), Members or Limited Partners, Ownership Interest | 92.20%us-gaap_LimitedLiabilityCompanyLLCOrLimitedPartnershipLPMembersOrLimitedPartnersOwnershipInterest / dei_LegalEntityAxis = cpt_CamdenOperatingLPMember |  |  |
Limited Liability Company (LLC) or Limited Partnership (LP), Managing Member or General Partner, Ownership Interest | 1.00%us-gaap_LimitedLiabilityCompanyLLCOrLimitedPartnershipLPManagingMemberOrGeneralPartnerOwnershipInterest / dei_LegalEntityAxis = cpt_CamdenOperatingLPMember |  |  |
Limited Partners' Capital Account, Units Outstanding | 0.8 us-gaap_LimitedPartnersCapitalAccountUnitsOutstanding / dei_LegalEntityAxis = cpt_CamdenOperatingLPMember |  |  |
Partners' Capital Account, Units, Redeemed |  |  |  | 4.0 us-gaap_PartnersCapitalAccountUnitsRedeemed / dei_LegalEntityAxis = cpt_CamdenOperatingLPMember
Preferred Stock, Dividend Rate, Percentage |  |  |  | 7.00%us-gaap_PreferredStockDividendRatePercentage / dei_LegalEntityAxis = cpt_CamdenOperatingLPMember
Temporary Equity, Redemption Price Per Share |  |  |  | $ 25.00 us-gaap_TemporaryEquityRedemptionPricePerShare / dei_LegalEntityAxis = cpt_CamdenOperatingLPMember
Stock Redeemed or Called During Period, Value |  |  |  | 100,000,000 us-gaap_StockRedeemedOrCalledDuringPeriodValue / dei_LegalEntityAxis = cpt_CamdenOperatingLPMember
Write off of original issuance costs of redeemed perpetual preferred units |  |  |  | $ 2,100,000 cpt_WriteOffOfOriginalIssuanceCostsOfRedeemedPerpetualPreferredUnits / dei_LegalEntityAxis = cpt_CamdenOperatingLPMember
Camden Summit Partnership L P [Member] |  |  |  |
Percentage Of Real Estate Properties Held With Operating Partnership | 30.00%cpt_PercentageOfRealEstatePropertiesHeldWithOperatingPartnership / dei_LegalEntityAxis = cpt_CamdenSummitPartnershipLPMember |  |  |
Units of Partnership Interest, Amount | 22.8 us-gaap_UnitsOfPartnershipInterestAmount / dei_LegalEntityAxis = cpt_CamdenSummitPartnershipLPMember |  |  |
Limited Liability Company (LLC) or Limited Partnership (LP), Members or Limited Partners, Ownership Interest | 94.20%us-gaap_LimitedLiabilityCompanyLLCOrLimitedPartnershipLPMembersOrLimitedPartnersOwnershipInterest / dei_LegalEntityAxis = cpt_CamdenSummitPartnershipLPMember |  |  |
Limited Liability Company (LLC) or Limited Partnership (LP), Managing Member or General Partner, Ownership Interest | 1.00%us-gaap_LimitedLiabilityCompanyLLCOrLimitedPartnershipLPManagingMemberOrGeneralPartnerOwnershipInterest / dei_LegalEntityAxis = cpt_CamdenSummitPartnershipLPMember |  |  |
Limited Partners' Capital Account, Units Outstanding | 1.1 us-gaap_LimitedPartnersCapitalAccountUnitsOutstanding / dei_LegalEntityAxis = cpt_CamdenSummitPartnershipLPMember |  |  |

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- Definition Percentage of real estate properties held with operating partnership. + References No definition available. + Details
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- Definition Write off of original issuance costs of redeemed perpetual preferred units which were unamortized as of the date of redemption of the perpetual preferred units. + References No definition available. + Details
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- Definition Percentage investment held by the managing member or general partner of the limited liability company (LLC) or limited partnership (LP). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 272 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6373374&loc=d3e70478-108055 + Details
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- Definition The number of units or percentage investment held by one or more members or limited partners of the LLC or LP. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 272 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6373374&loc=d3e70478-108055 + Details
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- Definition The number of limited partner units outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 272 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6373374&loc=d3e70434-108055 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 5 -Subparagraph (SAB TOPIC 4.F) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187171-122770 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 4 -Section F + Details
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- Definition The number of units redeemed during the year of each class of partners' capital account. Units represent shares of ownership of the general, limited, and preferred partners. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 5 -Subparagraph (SAB TOPIC 4.F) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187171-122770 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 16 -Subparagraph a, b -Article 6 + Details
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- Definition Equity impact of the value of stock bought back by the entity at the exercise price or redemption price. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 + Details
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- Definition Amount to be paid per share that is classified as temporary equity by entity upon redemption. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. If convertible, the issuer does not control the actions or events necessary to issue the maximum number of shares that could be required to be delivered under the conversion option if the holder exercises the option to convert the stock to another class of equity. If the security is a warrant or a rights issue, the warrant or rights issue is considered to be temporary equity if the issuer cannot demonstrate that it would be able to deliver upon the exercise of the option by the holder in all cases. Includes stock with put option held by ESOP and stock redeemable by holder only in the event of a change in control of the issuer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 28 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (27) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition The number of units or equivalent units outstanding for all classes. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 272 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6373374&loc=d3e70478-108055 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 5 -Subparagraph (SAB TOPIC 4.F) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187171-122770 + Details
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