Revenue earned by providing property management, construction, development, and other services to joint ventures.

No definition available.

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Period Type:	duration

- Definition

Our proportionate share of the gain (loss) on the sale of an unconsolidated joint venture property or properties during the period. Gain (loss) is included in equity in income (loss) on the income statement.

+ References

No definition available.

+ Details

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

- Definition

Maximum investment by formed unconsolidated joint venture including leverage of approximately 70% of the estimated value of the underlying real estate

+ References

No definition available.

+ Details

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Namespace Prefix:	cpt_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Number of joint ventures accounted for under equity method investments.

+ References

No definition available.

+ Details

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

- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=66011266&loc=d3e33918-111571

+ Details

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

- Definition

Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (b)(1)
-URI http://asc.fasb.org/extlink&oid=6851643&loc=d3e12069-110248

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- 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 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

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3179-108585

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Investing Activities
-URI http://asc.fasb.org/extlink&oid=6516133

+ Details

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

- Details

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Namespace Prefix:
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- Details

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Namespace Prefix:
Data Type:	na
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- Details

Name:	us-gaap_DisposalGroupClassificationAxis=cpt_Saleoftwooperatingpropertieswithinthefundsin2014Member
Namespace Prefix:
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Investments In Joint Ventures (Narrative) (Details)	1 Months Ended	3 Months Ended	12 Months Ended
Investments In Joint Ventures (Narrative) (Details)	Feb. 28, 2014 USD ($)	Mar. 31, 2014 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
Number of joint ventures accounted for under equity method investments			3		2
Equity method investment ownership percentage				31.30%	20.00%
Maximum guaranteed amount of loans utilized for construction and development activities for joint ventures			$ 0
Fees earned for property and asset management, construction, development, and other services to joint ventures			5,300,000	$ 5,800,000	$ 8,800,000
Maximum Investments by Formed Unconsolidated Joint Venture			$ 450,000,000
Minimum [Member]
Equity method investment ownership percentage			20.00%
Maximum [Member]
Equity method investment ownership percentage			31.30%
Sale of two operating properties within the funds in 2014 [Member]
Number of Real Estate Properties	2
Proceeds from Sale of Property, Plant, and Equipment	$ 65,600,000
Gain on sale of property by unconsolidated joint venture		$ 3,600,000
Number of Units in Real Estate Property	558