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

Amount of gain (loss) on sale or disposal of property, plant and equipment assets, excluding oil and gas property and timber property.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=109226348&loc=d3e2443-110228

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=109226691&loc=d3e2941-110230

+ Details

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

- Definition

The number of real estate properties owned as of the balance sheet date.

+ References

No definition available.

+ Details

Name:	us-gaap_NumberOfRealEstateProperties
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
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://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

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

- 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

- Definition

The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale.

+ References

+ Details

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

- 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_PropertyPlantAndEquipmentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_DisposalGroupClassificationAxis=us-gaap_DisposalGroupDisposedOfBySaleNotDiscontinuedOperationsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=cpt_CamdenCarolinianMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=cpt_CamdenHighlandVillageMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=cpt_CamdenRaineyStreetMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=cpt_CamdenOldTownScottsdaleMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=cpt_CamdenNorthQuarterMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=cpt_CamdenThorntonParkMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=cpt_CamdenPierDistrictMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=cpt_CamdenBuckheadSquareMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=cpt_CamdenSouthBayMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=cpt_CamdenHighlandVillageLandMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=cpt_CamdenHaydenIIMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=cpt_CamdenNoDaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=cpt_CamdenLakeEolaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=cpt_CamdenHillcrestMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=cpt_CamdenCopperRidge1Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Acquisitions, Dispositions, Impairment, and Discontinued Operations (Narrative) (Details)													1 Months Ended	3 Months Ended		12 Months Ended
	Jan. 13, 2020 USD ($) a	Dec. 19, 2019 USD ($) a	Dec. 05, 2019 USD ($)	May 29, 2019 USD ($) a	May 01, 2019 USD ($)	Apr. 01, 2019 USD ($) a	Sep. 24, 2018 USD ($) a	Apr. 12, 2018 USD ($) a	Feb. 15, 2018 USD ($)	Jan. 11, 2018 USD ($)	Jun. 01, 2017 USD ($)	Apr. 28, 2017 USD ($) a	Feb. 28, 2019 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 12, 2019
Property, Plant and Equipment [Line Items]
Number of Operating properties Acquired																4	3
Gain on sale of operating properties														$ 49,901,000		$ 49,901,000	$ 0	$ 43,231,000
Payments to Acquire Real Estate																$ 436,305,000	$ 290,005,000	$ 58,267,000
Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member]
Property, Plant and Equipment [Line Items]
Area of Land \| a							14.1
Proceeds from Sale of Land Held-for-investment							$ 11,500,000
Number of Real Estate Properties														2	1	2		1	3
Number of Units in Real Estate Property															1,005			1,005
Proceeds from Sale of Property, Plant, and Equipment															$ 78,400,000
Subsequent Event [Member]
Property, Plant and Equipment [Line Items]
Area of Land \| a	4.9
Purchase price of land acquired	$ 18,200,000
Number of Units in Real Estate Property	355
Camden Carolinian [Member]
Property, Plant and Equipment [Line Items]
Number of Operating properties Acquired			1
Number of Units in Real Estate Property			186
Payments to Acquire Real Estate			$ 75,100,000
Camden Highland Village [Member]
Property, Plant and Equipment [Line Items]
Number of Operating properties Acquired		1
Number of Units in Real Estate Property		552
Payments to Acquire Real Estate		$ 147,200,000
Camden Rainey Street [Member]
Property, Plant and Equipment [Line Items]
Number of Operating properties Acquired					1
Number of Units in Real Estate Property					326
Payments to Acquire Real Estate					$ 120,400,000
Camden Old Town Scottsdale [Member]
Property, Plant and Equipment [Line Items]
Number of Operating properties Acquired													1
Number of Units in Real Estate Property													316
Payments to Acquire Real Estate													$ 97,100,000
Camden North Quarter [Member]
Property, Plant and Equipment [Line Items]
Number of Operating properties Acquired									1
Number of Units in Real Estate Property									333
Payments to Acquire Real Estate									$ 81,400,000
Camden Thornton Park [Member]
Property, Plant and Equipment [Line Items]
Number of Operating properties Acquired							1
Number of Units in Real Estate Property							299
Payments to Acquire Real Estate							$ 89,800,000
Camden Pier District [Member]
Property, Plant and Equipment [Line Items]
Number of Operating properties Acquired										1
Number of Units in Real Estate Property										358
Payments to Acquire Real Estate										$ 126,900,000
Camden Buckhead Square [Member]
Property, Plant and Equipment [Line Items]
Number of Operating properties Acquired											1
Number of Units in Real Estate Property											250
Payments to Acquire Real Estate											$ 58,300,000
Camden South Bay [Member] \| Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member]
Property, Plant and Equipment [Line Items]
Gain on sale of operating properties																$ 6,200,000
Number of Real Estate Properties																			1
Number of Units in Real Estate Property																			270
Proceeds from Sale of Property, Plant, and Equipment														$ 38,500,000
Camden Highland Village Land [Member]
Property, Plant and Equipment [Line Items]
Area of Land \| a		2.3
Purchase price of land acquired		$ 8,000,000.0
Number of Units in Real Estate Property		300
Camden Hayden II [Member]
Property, Plant and Equipment [Line Items]
Area of Land \| a				11.6
Purchase price of land acquired				$ 18,000,000.0
Number of Units in Real Estate Property				400
Camden NoDa [Member]
Property, Plant and Equipment [Line Items]
Area of Land \| a						4.3
Purchase price of land acquired						$ 10,900,000
Number of Units in Real Estate Property						400
Camden Lake Eola [Member]
Property, Plant and Equipment [Line Items]
Area of Land \| a								1.8
Purchase price of land acquired								$ 11,400,000
Number of Units in Real Estate Property								360
Camden Hillcrest [Member]
Property, Plant and Equipment [Line Items]
Area of Land \| a												8.2
Purchase price of land acquired												$ 20,000,000.0
Number of Units in Real Estate Property												132
CamdenCopperRidge1 [Member] \| Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member]
Property, Plant and Equipment [Line Items]
Number of Units in Real Estate Property																			632
Proceeds from Sale of Property, Plant, and Equipment														$ 69,400,000