Acquisitions and Discontinued Operations (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	$ 727,152	$ 668,498
Property expenses	266,795	257,225
Property results	$ 460,357	$ 411,273

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