Number of operating properties acquired which are now fully consolidated during the period.

No definition available.

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Namespace Prefix:	cpt_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Area of land held.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:areaItemType
Balance Type:	na
Period Type:	instant

- Definition

The number of units in a real estate property owned as of the balance sheet date.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

The cash outflow from the acquisition of real estate intended to generate income for the owner; excludes land acquired for use by the owner.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3213-108585

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The cash outflow from the acquisition of a piece of land, anything permanently fixed to it, including buildings, structures on it and so forth; includes real estate intended to generate income for the owner; excludes real estate acquired for use by the owner.

+ References

+ Details

Name:	us-gaap_PaymentsToAcquireRealEstate
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The cash inflow from the sale of land held for investment; excludes sales of land held as inventory or productive use.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3179-108585

+ Details

Name:	us-gaap_ProceedsFromSaleOfLandHeldforinvestment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=cpt_CamdenRaineyStreetMember
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- Details

Name:	srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=cpt_CamdenOldTownScottsdaleMember
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Data Type:	na
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- Details

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- Details

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- Details

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- Details

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- Details

Name:	srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=cpt_CamdenNoDaMember
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- Details

Name:	us-gaap_DisposalGroupClassificationAxis=us-gaap_DisposalGroupDisposedOfBySaleNotDiscontinuedOperationsMember
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Acquisitions (Narrative) (Details) $ in Thousands								1 Months Ended	9 Months Ended
Acquisitions (Narrative) (Details) $ in Thousands	May 29, 2019 USD ($) a	May 01, 2019 USD ($)	Apr. 01, 2019 USD ($) a	Sep. 24, 2018 USD ($) a	Apr. 12, 2018 USD ($) a	Feb. 15, 2018 USD ($)	Jan. 11, 2018 USD ($)	Feb. 28, 2019 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2018 USD ($)
Area of Land \| a					1.8
Payments to Acquire Land					$ 11,400
Number of Units in Real Estate Property					360
Purchase Price of Operating Properties Acquired									$ 214,233	$ 290,005
Camden Rainey Street [Member]
Number of Operating properties Acquired		1
Number of Units in Real Estate Property		326
Purchase Price of Operating Properties Acquired		$ 120,400
Camden Old Town Scottsdale [Member]
Number of Operating properties Acquired								1
Number of Units in Real Estate Property								316
Purchase Price of Operating Properties Acquired								$ 97,100
Camden Thornton Park [Member]
Number of Operating properties Acquired				1
Number of Units in Real Estate Property				299
Purchase Price of Operating Properties Acquired				$ 89,800
Camden Pier District [Member]
Number of Operating properties Acquired							1
Number of Units in Real Estate Property							358
Purchase Price of Operating Properties Acquired							$ 126,900
Camden Hayden II [Member]
Area of Land \| a	11.6
Payments to Acquire Land	$ 18,000
Number of Units in Real Estate Property	400
Camden North Quarter [Member]
Number of Operating properties Acquired						1
Number of Units in Real Estate Property						333
Purchase Price of Operating Properties Acquired						$ 81,400
Camden Chadbourne Mill [Member]
Area of Land \| a			4.3
Payments to Acquire Land			$ 10,900
Number of Units in Real Estate Property			400
Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member]
Area of Land \| a				14.1
Proceeds from Sale of Land Held-for-investment				$ 11,500