XML 22 R52.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Fair Value Disclosures Fair Value Disclosures (Narrative) (Details) (USD $) | Sep. 30, 2014
--- | ---
Non-recurring fair value measurements [Abstract] |
Fair Value Measurements, Recurring and Nonrecurring [Table Text Block] | $ 0

X
- Details
Name: | cpt_NonrecurringfairvaluemeasurementsAbstract
Namespace Prefix: | cpt_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Aggregation of the liabilities reported on the balance sheet measured at fair value on a nonrecurring basis by the entity. + References No definition available. + Details
Name: | us-gaap_LiabilitiesFairValueDisclosureNonrecurring
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant