XML 33 R28.htm IDEA: XBRL DOCUMENT ﻿
v2.3.0.11

Share-based Compensation (Tables) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2011 | Jun. 30, 2011
Share-Based Compensation |  |
Summary of Share Options Outstanding and Exercisable |  |
|  | Options Outstanding |  |  | Weighted Average Exercise / Grant Price |  |  | Nonvested Share Awards Outstanding |  |  | Weighted Average Exercise / Grant Price |
Total options and nonvested share awards outstanding at December 31, 2010 |  |  | 1,837,990 |  |  | $ | 42.39 |  |  |  | 741,505 |  |  | $ | 42.16 |
Granted |  |  | — |  |  |  | — |  |  |  | 339,143 |  |  |  | 56.92 |
Exercised/vested |  |  | (327,454 | ) |  |  | 42.89 |  |  |  | (235,083 | ) |  |  | 46.74 |
Forfeited |  |  | — |  |  |  | — |  |  |  | (11,626 | ) |  |  | 42.76 |
Net activity |  |  | (327,454 | ) |  |  |  |  |  |  | 92,434 |  |  |  |  |
Total options and nonvested share awards outstanding at June 30, 2011 |  |  | 1,510,536 |  |  | $ | 42.29 |  |  |  | 833,939 |  |  | $ | 46.86 |
Summary of Share Incentive Plans |
|  | Outstanding Options (1) |  |  | Exercisable Options (1) |
Range of Exercise Prices |  | Number |  |  | Weighted Average Price |  |  | Number |  |  | Weighted Average Price |
$30.06-$41.91 |  |  | 550,956 |  |  | $ | 33.04 |  |  |  | 257,251 |  |  | $ | 36.43 |
$42.90-$44.00 |  |  | 342,063 |  |  |  | 43.53 |  |  |  | 304,800 |  |  |  | 43.48 |
$45.53-$73.32 |  |  | 617,517 |  |  |  | 49.85 |  |  |  | 464,366 |  |  |  | 50.45 |
Total options |  |  | 1,510,536 |  |  | $ | 42.29 |  |  |  | 1,026,417 |  |  | $ | 44.87 |

X
- Definition Tabular disclosure of share-based compensation plans that may be presented in a single table for outstanding, vested and expected to vest, and exercisable awards. The information that may be disclosed in this table may include, but is not limited to, number of shares, weighted average exercise price, weighted average remaining contractual life, and aggregate intrinsic value. + Details
Name: | cpt_ScheduleOfShareBasedCompensationActivityTableTextBlock
Namespace Prefix: | cpt
Data Type: | us-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition All required disclosures by grouped ranges of option exercise prices, including the upper and lower limits of the price range, the number of shares under option, weighted average exercise price and remaining contractual option terms. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph 64 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph f + Details
Name: | us-gaap_ScheduleOfShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeTextBlock
Namespace Prefix: | us-gaap
Data Type: | us-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_ShareBasedCompensationAbstract
Namespace Prefix: | us-gaap
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration