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CONDENSED CONSOLIDATED STATEMENT OF CASH FLOWS (Unaudited) (USD $) In Thousands, unless otherwise specified | 3 Months Ended
--- | ---
Mar. 31, 2015 | Mar. 31, 2014
CASH FLOWS FROM OPERATING ACTIVITIES |  |
Net income | $ 40,255 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | $ 107,031 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic
Adjustments to reconcile net income to cash provided by operating activities: |  |
Depreciation, depletion and amortization | 175,497 us-gaap_DepreciationDepletionAndAmortization | 147,418 us-gaap_DepreciationDepletionAndAmortization
Deferred income tax expense | 15,081 us-gaap_DeferredIncomeTaxExpenseBenefit | 57,603 us-gaap_DeferredIncomeTaxExpenseBenefit
(Gain) loss on sale of assets | (138)us-gaap_GainLossOnSaleOfPropertyPlantEquipment | 1,285 us-gaap_GainLossOnSaleOfPropertyPlantEquipment
Exploration expense | 162 us-gaap_ResultsOfOperationsDryHoleCosts | 2,040 us-gaap_ResultsOfOperationsDryHoleCosts
(Gain) loss on derivative instruments | 3,562 us-gaap_UnrealizedGainLossOnDerivatives | 0 us-gaap_UnrealizedGainLossOnDerivatives
Amortization of debt issuance costs | 1,267 us-gaap_AmortizationOfFinancingCosts | 1,126 us-gaap_AmortizationOfFinancingCosts
Stock-based compensation and other | 4,490 cog_StockBasedCompensationExpenseAndOther | 3,029 cog_StockBasedCompensationExpenseAndOther
Changes in assets and liabilities: |  |
Accounts receivable, net | 49,615 us-gaap_IncreaseDecreaseInReceivables | (23,418)us-gaap_IncreaseDecreaseInReceivables
Income taxes | 8,979 us-gaap_IncreaseDecreaseInIncomeTaxesPayableNetOfIncomeTaxesReceivable | (16,889)us-gaap_IncreaseDecreaseInIncomeTaxesPayableNetOfIncomeTaxesReceivable
Inventories | (61)us-gaap_IncreaseDecreaseInInventories | 7,076 us-gaap_IncreaseDecreaseInInventories
Other current assets | (192)us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets | 1,170 us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets
Accounts payable and accrued liabilities | (29,629)us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities | (16,089)us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities
Other assets and liabilities | 1,930 us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet | 39 us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet
Stock-based compensation tax benefit | (3,437)us-gaap_ExcessTaxBenefitFromShareBasedCompensationOperatingActivities | (16,043)us-gaap_ExcessTaxBenefitFromShareBasedCompensationOperatingActivities
Net cash provided by operating activities | 267,381 us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations | 255,378 us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations
CASH FLOWS FROM INVESTING ACTIVITIES |  |
Capital expenditures | (395,242)us-gaap_PaymentsToExploreAndDevelopOilAndGasProperties | (338,701)us-gaap_PaymentsToExploreAndDevelopOilAndGasProperties
Proceeds from sale of assets | 3,081 us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment | 108 us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment
Restricted cash | 0 us-gaap_DecreaseInRestrictedCash | 8,382 us-gaap_DecreaseInRestrictedCash
Investment in equity method investments | (5,078)us-gaap_PaymentsToAcquireEquityMethodInvestments | (5,937)us-gaap_PaymentsToAcquireEquityMethodInvestments
Net cash used in investing activities | (397,239)us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations | (336,148)us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations
CASH FLOWS FROM FINANCING ACTIVITIES |  |
Borrowings from debt | 382,000 us-gaap_ProceedsFromIssuanceOfLongTermDebt | 366,000 us-gaap_ProceedsFromIssuanceOfLongTermDebt
Repayments of debt | (257,000)us-gaap_RepaymentsOfLongTermDebt | (291,000)us-gaap_RepaymentsOfLongTermDebt
Dividends paid | (8,263)us-gaap_PaymentsOfDividendsCommonStock | (8,332)us-gaap_PaymentsOfDividendsCommonStock
Stock-based compensation tax benefit | 3,437 us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities | 16,043 us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities
Other | 2,678 us-gaap_ProceedsFromPaymentsForOtherFinancingActivities | 90 us-gaap_ProceedsFromPaymentsForOtherFinancingActivities
Net cash provided by financing activities | 122,852 us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations | 82,801 us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations
Net (decrease) increase in cash and cash equivalents | (7,006)us-gaap_NetCashProvidedByUsedInContinuingOperations | 2,031 us-gaap_NetCashProvidedByUsedInContinuingOperations
Cash and cash equivalents, beginning of period | 20,954 us-gaap_CashAndCashEquivalentsAtCarryingValue | 23,400 us-gaap_CashAndCashEquivalentsAtCarryingValue
Cash and cash equivalents, end of period | $ 13,948 us-gaap_CashAndCashEquivalentsAtCarryingValue | $ 25,431 us-gaap_CashAndCashEquivalentsAtCarryingValue

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- Definition Amount of noncash expense included in interest expense to issue debt and obtain financing associated with the related debt instruments. Alternate captions include noncash interest expense. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.8) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 8 -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 8 -Article 9 + Details
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- Definition Amount of gain (loss) on sale or disposal of property, plant and equipment assets, including oil and gas property and timber property. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 + Details
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- Definition The cash outflow for exploration and development of oil and gas properties. It includes cash payments related to development of oil and gas wells drilled at previously untested geologic structures (to determine the presence of oil or gas) and wells drilled at sites where the presence of oil or gas has already been established (to extract the oil or gas). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585 + Details
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- Definition The net cash inflow or outflow from other financing activities. This element is used when there is not a more specific and appropriate element in the taxonomy. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3095-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3098-108585 + Details
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- Definition The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3179-108585 + Details
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- Definition The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + Details
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- Definition Dry hole costs from oil and gas producing activities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 360 -Section 25 -Paragraph 9 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6474861&loc=d3e64954-109465 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 23 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=8451039&loc=d3e62136-109447 + Details
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- Definition The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of derivative instruments, including options, swaps, futures, and forward contracts, held at each balance sheet date, that was included in earnings for the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 + Details
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