Property Acquisitions, Discontinued Operations, Assets Held For Sale and Impairments (Pro Forma Consolidated Income Statement Information) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011
Property Acquisitions, Discontinued Operations, And Assets Held For Sale [Abstract]
Property revenues	$ 757,155	$ 696,630
Property expenses	280,232	270,639
Property results	$ 476,923	$ 425,991

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.

No definition available.

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