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Property Acquisitions, Discontinued Operations, And Assets Held For Sale Property Acquisitions, Discontinued Operations, And Assets Held For Sale (Pro Forma Consolidated Income Statement Information) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Property Acquisitions, Discontinued Operations, And Assets Held For Sale [Abstract]
Property revenues	$ 196,396	$ 179,665	$ 571,048	$ 526,824
Property expenses	74,060	72,541	216,160	211,034
Property results	$ 122,336	$ 107,124	$ 354,888	$ 315,790

X

- Definition

The pro forma consolidated expenses for the period as if the acquisition of control of joint ventures had occurred at the beginning of the period.

+ References

No definition available.

+ Details

Name:	cpt_ProFormaConsolidatedExpenses
Namespace Prefix:	cpt_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

This element represents pro forma consolidated property results, which represents property revenues less property expenses, and assumes the acquisition of control of joint ventures had occurred at the beginning of the periods disclosed.

+ References

No definition available.

+ Details

Name:	cpt_ProFormaConsolidatedPropertyResults
Namespace Prefix:	cpt_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

The pro forma consolidated revenues for the period as if the acquisition of control of joint ventures had occurred at the beginning of the period.

+ References

No definition available.

+ Details

Name:	cpt_ProFormaConsolidatedRevenues
Namespace Prefix:	cpt_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Details

Name:	cpt_PropertyAcquisitionsDiscontinuedOperationsAndAssetsHeldForSaleAbstract
Namespace Prefix:	cpt_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration