Description Of Business (Details)	Sep. 30, 2013
Accounting Policies [Abstract]
Number of multifamily communities comprising of apartment homes	192
Total number of apartment homes in multifamily communities	66,278
Number of multifamily properties under development	12
Total number of apartment homes in multifamily properties upon completion of development	3,644

The number of units in the real estate properties under development the company owned interests in or fully owned as of the balance sheet date which will be added upon completion of development.

No definition available.

Name:	cpt_TotalNumberOfApartmentHomesInMultifamilyPropertiesUponCompletionOfDevelopment
Namespace Prefix:	cpt_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant