XML 29 R29.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Stock-based Compensation (Tables) | 9 Months Ended
--- | ---
Sep. 30, 2014
Supplemental Employee Incentive Plan IV |
Stock-Based Compensation arrangements |
Schedule of Value per Share and Assumptions Used | The following assumptions were used to determine the period-end fair value of the Supplemental Employee Incentive Plan IV liability using a Monte Carlo model:
| September 30, 2014
Stock price volatility | 33.9 | %
Risk free rate of return | 1.0 | %
Annual salary increase rate | 4.0 | %
Annual turnover rate | 4.6 | %
TSR Performance Share Awards |
Stock-Based Compensation arrangements |
Schedule of Value per Share and Assumptions Used | The following assumptions were used to determine the grant date fair value of the equity component (February 20, 2014) and the period-end fair value of the liability component of the TSR Performance Share Awards:
|  | Grant Date |  | September 30, 2014
Fair value per performance share award |  | $ | 32.04 |  |  | $7.19 - $25.22 |
Assumptions: |  |  |  |  |  |
Stock price volatility |  | 41.3 | % |  | 27.5% - 120.4% |
Risk free rate of return |  | 0.7 | % |  | 0.02% - 0.7% |
Expected dividend yield |  | 0.2 | % |  | 0.2 | %

X
- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of share-based compensation. + References No definition available. + Details
Name: | cog_ScheduleOfShareBasedPaymentAwardValuationAssumptionsTableTextBlock
Namespace Prefix: | cog_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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