XML 29 R27.htm IDEA: XBRL DOCUMENT
v2.4.0.8

ACCUMULATED OTHER COMPREHENSIVE INCOME / (LOSS) (Tables) | 6 Months Ended
--- | ---
Jun. 30, 2013
ACCUMULATED OTHER COMPREHENSIVE INCOME / (LOSS) |
Changes in accumulated other comprehensive income / (loss) by component, net of tax |
(In thousands) |  | Net Gains (Losses) on Cash Flow Hedges |  | Postretirement Benefits |  | Total |
Balance at December 31, 2012 |  | $ | 30,717 |  | $ | (6,837 | ) | $ | 23,880 |
Other comprehensive income before reclassifications |  | 32,864 |  | — |  | 32,864 |
Amounts reclassified from accumulated other comprehensive income |  | (10,430 | ) | 249 |  | (10,181 | )
Net current-period other comprehensive income |  | 22,434 |  | 249 |  | 22,683 |
Balance at June 30, 2013 |  | $ | 53,151 |  | $ | (6,588 | ) | $ | 46,563 |
Schedule of amount reclassified from accumulated other comprehensive income / (loss) into the Condensed Consolidated Statement of Operations |
(In thousands) |  | Three Months Ended June 30, 2013 |  | Six Months Ended June 30, 2013 |  | Affected Line Item in the Statement Where Net Income is Presented |
Net gains / (losses) on cash flow hedges |  |  |  |  |  |  |
Commodity contracts |  | $ | (272 | ) | $ | 13,056 |  | Natural gas revenues |
Commodity contracts |  | 2,094 |  | 4,136 |  | Crude oil and condensate revenues |
Postretirement benefits |  |  |  |  |  |  |
Amortization of net loss |  | (205 | ) | (410 | ) | General and administrative expense |
|  | 1,617 |  | 16,782 |  | Total before tax |
|  | (636 | ) | (6,601 | ) | Tax (expense) / benefit |
Total reclassifications for the period |  | $ | 981 |  | $ | 10,181 |  | Net of tax |

X
- Definition Tabular disclosure of changes in accumulated other comprehensive income by component, net of tax. + References No definition available. + Details
Name: | cog_ScheduleOfAccumulatedOtherComprehensiveIncomeLossByComponentsTableTextBlock
Namespace Prefix: | cog_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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

X
- Definition Tabular disclosure of information about items reclassified out of accumulated other comprehensive income (loss). + References No definition available. + Details
Name: | us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration