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

No definition available.

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

- Definition

Area of land held.

+ References

No definition available.

+ Details

Name:	us-gaap_AreaOfLand
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

Name:	us-gaap_NumberOfUnitsInRealEstateProperty
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://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3213-108585

+ Details

Name:	us-gaap_PaymentsToAcquireLand
Namespace Prefix:	us-gaap_
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

- Details

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Namespace Prefix:
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Period Type:

- Details

Name:	us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=cpt_CamdenPierDistrictMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=cpt_CamdenNorthQuarterMember
Namespace Prefix:
Data Type:	na
Balance Type:
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Acquisitions, Dispositions, Discontinued Operations and Assets Held for Sale (Narrative) (Details) $ in Thousands				3 Months Ended
	Apr. 12, 2018 USD ($) a	Feb. 15, 2018 USD ($)	Jan. 11, 2018 USD ($)	Mar. 31, 2018 USD ($)	Mar. 31, 2017 USD ($)
Purchase Price of Operating Properties Acquired				$ 201,899	$ 0
Subsequent Event [Member]
Area of Land \| a	1.8
Payments to Acquire Land	$ 11,400
Number of Units in Real Estate Property	360
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 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