$CHRD
Chord Energy Corp Stock $chrd

$chrd Overview Financials Valuation SEC Filings Company Website

2014 Q4 Form 10-K Financial Statement

#000148615915000009 Filed on February 26, 2015

Income Statement

Concept	2014 Q4	2013 Q4	2013 Q3
Revenue	$299.7M	$333.6M	$305.5M
YoY Change	-10.17%	55.66%	65.39%
Cost Of Revenue	$87.10M	$76.10M	$59.00M
YoY Change	14.45%	84.71%	55.26%
Gross Profit	$212.6M	$257.5M	$246.5M
YoY Change	-17.44%	48.67%	68.03%
Gross Profit Margin	70.94%	77.18%	80.69%
Selling, General & Admin	$33.60M	$34.10M	$22.40M
YoY Change	-1.47%	74.87%	34.94%
% of Gross Profit	15.8%	13.24%	9.09%
Research & Development	$1.100M	-$500.0K	$500.0K
YoY Change	-320.0%	-600.0%	66.67%
% of Gross Profit	0.52%	-0.19%	0.2%
Depreciation & Amortization	$116.8M	$101.3M	$72.73M
YoY Change	15.3%	53.72%	26.08%
% of Gross Profit	54.94%	39.34%	29.5%
Operating Expenses	$151.5M	$135.0M	$95.50M
YoY Change	12.22%	57.89%	27.84%
Operating Profit	$15.92M	$122.1M	$150.9M
YoY Change	-86.96%	41.0%	109.42%
Interest Expense	$266.9M	-$35.30M	$22.85M
YoY Change	-856.09%	71.36%	8.94%
% of Operating Profit	1676.09%	-28.9%	15.15%
Other Income/Expense, Net	-$100.0K	$100.0K	-$62.65M
YoY Change	-200.0%	-95.65%	48.2%
Pretax Income	$282.8M	$86.90M	$88.21M
YoY Change	225.43%	27.05%	196.37%
Income Tax	$106.3M	$32.40M	$33.72M
% Of Pretax Income	37.59%	37.28%	38.22%
Net Earnings	$176.5M	$54.49M	$54.50M
YoY Change	223.92%	27.94%	197.58%
Net Earnings / Revenue	58.9%	16.33%	17.84%
Basic Earnings Per Share			$0.59
Diluted Earnings Per Share	$1.76	$0.57	$0.59
COMMON SHARES
Basic Shares Outstanding	101.3M shares	93.70M shares	92.45M shares
Diluted Shares Outstanding			92.84M shares

Balance Sheet

Concept	2014 Q4	2013 Q4	2013 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments	$45.80M	$91.90M	$125.4M
YoY Change	-50.16%	-61.6%	-69.15%
Cash & Equivalents	$45.81M	$91.90M	$125.4M
Short-Term Investments		$0.00	$0.00
Other Short-Term Assets	$6.539M	$391.0K	$473.0K
YoY Change	1572.38%	16.72%	506.41%
Inventory	$21.35M	$20.65M	$18.36M
Prepaid Expenses	$14.27M	$10.19M	$7.440M
Receivables	$130.9M	$175.7M	$155.1M
Other Receivables	$0.00	$800.0K	$1.200M
Total Short-Term Assets	$696.6M	$447.6M	$1.423B
YoY Change	55.63%	-9.15%	121.8%
LONG-TERM ASSETS
Property, Plant & Equipment	$5.187B	$4.080B	$2.613B
YoY Change	27.13%	103.32%	44.88%
Goodwill
YoY Change
Intangibles
YoY Change
Long-Term Investments
YoY Change
Other Assets	$12.34M	$184.6M	$46.80M
YoY Change	-93.32%	525.76%	32.2%
Total Long-Term Assets	$5.212B	$4.230B	$2.660B
YoY Change	23.21%	107.77%	44.63%
TOTAL ASSETS
Total Short-Term Assets	$696.6M	$447.6M	$1.423B
Total Long-Term Assets	$5.212B	$4.230B	$2.660B
Total Assets	$5.909B	$4.678B	$4.083B
YoY Change	26.32%	84.99%	64.59%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$20.96M	$8.920M	$39.47M
YoY Change	134.96%	-28.59%	27.51%
Accrued Expenses	$410.4M	$241.8M	$198.5M
YoY Change	69.7%	27.37%	-1.02%
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$795.1M	$466.4M	$424.2M
YoY Change	70.48%	41.0%	19.51%
LONG-TERM LIABILITIES
Long-Term Debt	$2.671B	$2.536B	$2.360B
YoY Change	5.33%	111.3%	96.67%
Other Long-Term Liabilities	$2.116M	$2.183M	$2.310M
YoY Change	-3.07%	9.31%	11.16%
Total Long-Term Liabilities	$2.673B	$2.538B	$2.362B
YoY Change	5.32%	111.13%	96.52%
TOTAL LIABILITIES
Total Short-Term Liabilities	$795.1M	$466.4M	$424.2M
Total Long-Term Liabilities	$2.673B	$2.538B	$2.362B
Total Liabilities	$4.037B	$3.363B	$3.108B
YoY Change	20.02%	93.99%	79.57%
SHAREHOLDERS EQUITY
Retained Earnings	$874.8M	$367.9M	$313.4M
YoY Change	137.78%	162.91%	221.96%
Common Stock	$1.008B	$986.0M	$667.7M
YoY Change	2.25%	49.65%	1.95%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$10.67M
YoY Change
Treasury Stock Shares	285.7K shares
Shareholders Equity	$1.872B	$1.349B	$975.9M
YoY Change
Total Liabilities & Shareholders Equity	$5.909B	$4.712B	$4.083B
YoY Change	25.41%	86.33%	64.59%

Cashflow Statement

Concept	2014 Q4	2013 Q4	2013 Q3
OPERATING ACTIVITIES
Net Income	$176.5M	$54.49M	$54.50M
YoY Change	223.92%	27.94%	197.58%
Depreciation, Depletion And Amortization	$116.8M	$101.3M	$72.73M
YoY Change	15.3%	53.72%	26.08%
Cash From Operating Activities	$199.0M	$161.2M	$178.9M
YoY Change	23.45%	46.15%	62.34%
INVESTING ACTIVITIES
Capital Expenditures	$401.6M	$1.666B	$358.6M
YoY Change	-75.9%	503.99%	6.54%
Acquisitions
YoY Change
Other Investing Activities	$31.30M	$982.8M	-$996.6M
YoY Change	-96.82%	875.97%	697.92%
Cash From Investing Activities	-$370.4M	-$683.6M	-$1.355B
YoY Change	-45.82%	290.18%	193.65%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	149.9M	488.8M	1.140B
YoY Change	-69.33%	-25826.32%	190.37%
NET CHANGE
Cash From Operating Activities	199.0M	161.2M	178.9M
Cash From Investing Activities	-370.4M	-683.6M	-1.355B
Cash From Financing Activities	149.9M	488.8M	1.140B
Net Change In Cash	-21.50M	-33.60M	-36.00M
YoY Change	-36.01%	-49.7%	-186.96%
FREE CASH FLOW
Cash From Operating Activities	$199.0M	$161.2M	$178.9M
Capital Expenditures	$401.6M	$1.666B	$358.6M
Free Cash Flow	-$202.6M	-$1.505B	-$179.7M
YoY Change	-86.54%	808.94%	-20.63%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2014	dei	Amendment Flag AmendmentFlag	false
CY2014	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2014	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2014	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2014
CY2014	dei	Document Period End Date DocumentPeriodEndDate	2014-12-31
CY2014	dei	Document Type DocumentType	10-K
CY2014	dei	Entity Central Index Key EntityCentralIndexKey	0001486159
CY2015Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	102451226	shares
CY2014	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2014	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2014Q2	dei	Entity Public Float EntityPublicFloat	5653377903	USD
CY2014	dei	Entity Registrant Name EntityRegistrantName	Oasis Petroleum Inc.
CY2014	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2014	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2014	dei	Trading Symbol TradingSymbol	OAS
CY2013Q4	oas	Accrued Capital Costs AccruedCapitalCosts	199085000	USD
CY2014Q4	oas	Accrued Capital Costs AccruedCapitalCosts	361034000	USD
CY2013Q4	oas	Accrued General And Administrative Expense AccruedGeneralAndAdministrativeExpense	14203000	USD
CY2014Q4	oas	Accrued General And Administrative Expense AccruedGeneralAndAdministrativeExpense	12225000	USD
CY2013Q4	oas	Accrued Lease Operating Expense AccruedLeaseOperatingExpense	18660000	USD
CY2014Q4	oas	Accrued Lease Operating Expense AccruedLeaseOperatingExpense	26706000	USD
CY2012	oas	Additional Proved Undeveloped Reserves AdditionalProvedUndevelopedReserves	57323	MBoe
CY2013	oas	Additional Proved Undeveloped Reserves AdditionalProvedUndevelopedReserves	23904	MBoe
CY2014	oas	Additional Proved Undeveloped Reserves AdditionalProvedUndevelopedReserves	58192	MBoe
CY2013Q4	oas	Advances From Joint Interest Partners Current AdvancesFromJointInterestPartnersCurrent	12829000	USD
CY2014Q4	oas	Advances From Joint Interest Partners Current AdvancesFromJointInterestPartnersCurrent	6616000	USD
CY2013Q4	oas	Advances To Joint Interest Partners Current AdvancesToJointInterestPartnersCurrent	760000	USD
CY2014Q4	oas	Advances To Joint Interest Partners Current AdvancesToJointInterestPartnersCurrent	13000	USD
CY2013Q4	oas	Assets Heldfor Sale Accumulated Depreciation Depletion Amortizationand Impairment AssetsHeldforSaleAccumulatedDepreciationDepletionAmortizationandImpairment	54318000	USD
CY2013Q4	oas	Assets Heldfor Sale Long Lived Netof Liabilities AssetsHeldforSaleLongLivedNetofLiabilities	135093000	USD
CY2013Q4	oas	Assets Heldfor Sale Oiland Gas Properties AssetsHeldforSaleOilandGasProperties	191384000	USD
CY2014Q4	oas	Capital Spending Commitment CapitalSpendingCommitment	4800000	USD
CY2012	oas	Debt Discount Amortization And Other DebtDiscountAmortizationAndOther	2810000	USD
CY2013	oas	Debt Discount Amortization And Other DebtDiscountAmortizationAndOther	4248000	USD
CY2014	oas	Debt Discount Amortization And Other DebtDiscountAmortizationAndOther	11028000	USD
CY2014	oas	Debt Instrument Collateral Oiland Gas Properties Eligible Percentof Reserve Value Required DebtInstrumentCollateralOilandGasPropertiesEligiblePercentofReserveValueRequired	0.8
CY2014Q4	oas	Derivative Numberof Counterparties DerivativeNumberofCounterparties	7	counterparty
CY2014	oas	Discount Rate Of Future Cash Flows DiscountRateOfFutureCashFlows	0.1
CY2012	oas	Estimated Extensions And Discoveries Of Reserves Associated With New Wells EstimatedExtensionsAndDiscoveriesOfReservesAssociatedWithNewWells	16548	MBoe
CY2013	oas	Estimated Extensions And Discoveries Of Reserves Associated With New Wells EstimatedExtensionsAndDiscoveriesOfReservesAssociatedWithNewWells	22190	MBoe
CY2014	oas	Estimated Extensions And Discoveries Of Reserves Associated With New Wells EstimatedExtensionsAndDiscoveriesOfReservesAssociatedWithNewWells	34404	MBoe
CY2014	oas	Future Obligations Under Cost Sharing Agreements FutureObligationsUnderCostSharingAgreements	9000000	USD
CY2013Q4	oas	Liabilitiesof Assets Heldfor Sale Asset Retirement Obligation LiabilitiesofAssetsHeldforSaleAssetRetirementObligation	1973000	USD
CY2012	oas	Non Cash Asset Retirement Obligations NonCashAssetRetirementObligations	10230000	USD
CY2013	oas	Non Cash Asset Retirement Obligations NonCashAssetRetirementObligations	13201000	USD
CY2014	oas	Non Cash Asset Retirement Obligations NonCashAssetRetirementObligations	6182000	USD
CY2014	oas	Ownership Percentage Guarantor OwnershipPercentageGuarantor	1
CY2012	oas	Paymentsfor Costs Relatedto Divestitureof Businesses PaymentsforCostsRelatedtoDivestitureofBusinesses	0	USD
CY2013	oas	Paymentsfor Costs Relatedto Divestitureof Businesses PaymentsforCostsRelatedtoDivestitureofBusinesses	0	USD
CY2014	oas	Paymentsfor Costs Relatedto Divestitureof Businesses PaymentsforCostsRelatedtoDivestitureofBusinesses	2337000	USD
CY2012	oas	Percentage Of Proved Undeveloped Reserves PercentageOfProvedUndevelopedReserves	1
CY2013	oas	Percentage Of Proved Undeveloped Reserves PercentageOfProvedUndevelopedReserves	1
CY2014	oas	Percentage Of Proved Undeveloped Reserves PercentageOfProvedUndevelopedReserves	1
CY2012	oas	Percentage Of Reserves Produced From Wells PercentageOfReservesProducedFromWells	1
CY2013	oas	Percentage Of Reserves Produced From Wells PercentageOfReservesProducedFromWells	1
CY2014	oas	Percentage Of Reserves Produced From Wells PercentageOfReservesProducedFromWells	1
CY2012	oas	Proceed From Advance From Joint Interest Partners ProceedFromAdvanceFromJointInterestPartners	12112000	USD
CY2013	oas	Proceed From Advance From Joint Interest Partners ProceedFromAdvanceFromJointInterestPartners	-8347000	USD
CY2014	oas	Proceed From Advance From Joint Interest Partners ProceedFromAdvanceFromJointInterestPartners	-6213000	USD
CY2013	oas	Proceedsfrom Issuanceof Common Stock Netof Discountsand Expenses ProceedsfromIssuanceofCommonStockNetofDiscountsandExpenses	314400000	USD
CY2013Q4	oas	Production Taxes Payable ProductionTaxesPayable	22300000	USD
CY2014Q4	oas	Production Taxes Payable ProductionTaxesPayable	19500000	USD
CY2013Q4	oas	Proved Oil And Gas Properties Net ProvedOilAndGasPropertiesNet	3101145000	USD
CY2014Q4	oas	Proved Oil And Gas Properties Net ProvedOilAndGasPropertiesNet	4113754000	USD
CY2014	oas	Proved Undeveloped Reserves Decreasefrom Estimated Net Proved Reserve Balance Energy ProvedUndevelopedReservesDecreasefromEstimatedNetProvedReserveBalanceEnergy	21411	MBoe
CY2014	oas	Proved Undeveloped Reserves Numberof Locations ProvedUndevelopedReservesNumberofLocations	80	location
CY2014	oas	Proved Undeveloped Reserves Numberof Locations Net ProvedUndevelopedReservesNumberofLocationsNet	56.2	location
CY2013	oas	Revenue Suspense RevenueSuspense	79700000	USD
CY2014	oas	Revenue Suspense RevenueSuspense	152300000	USD
CY2013Q4	oas	Revenues Payable And Production Taxes Current RevenuesPayableAndProductionTaxesCurrent	146741000	USD
CY2014Q4	oas	Revenues Payable And Production Taxes Current RevenuesPayableAndProductionTaxesCurrent	209890000	USD
CY2012	oas	Revisions Percentage RevisionsPercentage	-0.025
CY2013	oas	Revisions Percentage RevisionsPercentage	0.036
CY2014	oas	Revisions Percentage RevisionsPercentage	-0.110
CY2013Q4	oas	Treasury Stock At Cost Shares TreasuryStockAtCostShares	167155	shares
CY2014Q4	oas	Treasury Stock At Cost Shares TreasuryStockAtCostShares	285677	shares
CY2013Q4	oas	Treasury Stock Cost TreasuryStockCost	5362000	USD
CY2014Q4	oas	Treasury Stock Cost TreasuryStockCost	10671000	USD
CY2012	oas	Unweighted Arithmetic Average First Day Of Month Prices UnweightedArithmeticAverageFirstDayOfMonthPrices	94.68
CY2013	oas	Unweighted Arithmetic Average First Day Of Month Prices UnweightedArithmeticAverageFirstDayOfMonthPrices	96.96
CY2014	oas	Unweighted Arithmetic Average First Day Of Month Prices UnweightedArithmeticAverageFirstDayOfMonthPrices	95.28
CY2012	oas	Unweighted Arithmetic Average First Day Of Month Prices For Natural Gas UnweightedArithmeticAverageFirstDayOfMonthPricesForNaturalGas	2.75
CY2013	oas	Unweighted Arithmetic Average First Day Of Month Prices For Natural Gas UnweightedArithmeticAverageFirstDayOfMonthPricesForNaturalGas	3.66
CY2014	oas	Unweighted Arithmetic Average First Day Of Month Prices For Natural Gas UnweightedArithmeticAverageFirstDayOfMonthPricesForNaturalGas	4.35
CY2013Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	8920000	USD
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CY2013Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	175653000	USD
CY2014Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	130934000	USD
CY2012	us-gaap	Accretion Of Discount AccretionOfDiscount	190370000	USD
CY2013	us-gaap	Accretion Of Discount AccretionOfDiscount	346068000	USD
CY2014	us-gaap	Accretion Of Discount AccretionOfDiscount	548690000	USD
CY2013Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	241830000	USD
CY2014Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	410379000	USD
CY2013Q4	us-gaap	Accrued Royalties Current AccruedRoyaltiesCurrent	44700000	USD
CY2014Q4	us-gaap	Accrued Royalties Current AccruedRoyaltiesCurrent	38100000	USD
CY2013Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	637676000	USD
CY2014Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	1092793000	USD
CY2013Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	985023000	USD
CY2014Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	1007202000	USD
CY2012	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	3194000	USD
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CY2014	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	5309000	USD
CY2014	us-gaap	Adjustments To Additional Paid In Capital Stock Issued Issuance Costs AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts	-176000	USD
CY2012	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	3000000	USD
CY2013	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	4500000	USD
CY2014	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	6400000	USD
CY2012	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	465000	shares
CY2013	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	634000	shares
CY2014	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	980000	shares
CY2012Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	23234000	USD
CY2013Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	36458000	USD
CY2014Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	42549000	USD
CY2013	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	1346000	USD
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CY2014	us-gaap	Asset Retirement Obligation Liabilities Incurred AssetRetirementObligationLiabilitiesIncurred	5376000	USD
CY2013	us-gaap	Asset Retirement Obligation Liabilities Settled AssetRetirementObligationLiabilitiesSettled	0	USD
CY2014	us-gaap	Asset Retirement Obligation Liabilities Settled AssetRetirementObligationLiabilitiesSettled	2065000	USD
CY2013	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	213000	USD
CY2014	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	863000	USD
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CY2013Q4	us-gaap	Assets Fair Value Disclosure AssetsFairValueDisclosure	4339000	USD
CY2013Q4	us-gaap	Assets Assets	4711924000	USD
CY2014Q4	us-gaap	Assets Assets	5938412000	USD
CY2013Q4	us-gaap	Assets Current AssetsCurrent	447606000	USD
CY2014Q4	us-gaap	Assets Current AssetsCurrent	696607000	USD
CY2014Q4	us-gaap	Assets Fair Value Disclosure AssetsFairValueDisclosure	316249000	USD
CY2012	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	59878000	USD
CY2013	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	34354000	USD
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CY2013Q4	us-gaap	Capitalized Costs Accumulated Depreciation Depletion Amortization And Valuation Allowance For Relating To Oil And Gas Producing Activities CapitalizedCostsAccumulatedDepreciationDepletionAmortizationAndValuationAllowanceForRelatingToOilAndGasProducingActivities	612380000	USD
CY2014Q4	us-gaap	Capitalized Costs Accumulated Depreciation Depletion Amortization And Valuation Allowance For Relating To Oil And Gas Producing Activities CapitalizedCostsAccumulatedDepreciationDepletionAmortizationAndValuationAllowanceForRelatingToOilAndGasProducingActivities	1043121000	USD
CY2013Q4	us-gaap	Capitalized Costs Asset Retirement Costs CapitalizedCostsAssetRetirementCosts	32600000	USD
CY2014Q4	us-gaap	Capitalized Costs Asset Retirement Costs CapitalizedCostsAssetRetirementCosts	36900000	USD
CY2013Q4	us-gaap	Capitalized Costs Oil And Gas Producing Activities Net CapitalizedCostsOilAndGasProducingActivitiesNet	3916578000	USD
CY2014Q4	us-gaap	Capitalized Costs Oil And Gas Producing Activities Net CapitalizedCostsOilAndGasProducingActivitiesNet	4923019000	USD
CY2013Q4	us-gaap	Capitalized Costs Proved Properties CapitalizedCostsProvedProperties	3713525000	USD
CY2014Q4	us-gaap	Capitalized Costs Proved Properties CapitalizedCostsProvedProperties	5156875000	USD
CY2013Q4	us-gaap	Capitalized Costs Unproved Properties CapitalizedCostsUnprovedProperties	815433000	USD
CY2014Q4	us-gaap	Capitalized Costs Unproved Properties CapitalizedCostsUnprovedProperties	809265000	USD
CY2012	us-gaap	Capitalized Exploratory Well Cost Additions Pending Determination Of Proved Reserves CapitalizedExploratoryWellCostAdditionsPendingDeterminationOfProvedReserves	160813000	USD
CY2013	us-gaap	Capitalized Exploratory Well Cost Additions Pending Determination Of Proved Reserves CapitalizedExploratoryWellCostAdditionsPendingDeterminationOfProvedReserves	346814000	USD
CY2014	us-gaap	Capitalized Exploratory Well Cost Additions Pending Determination Of Proved Reserves CapitalizedExploratoryWellCostAdditionsPendingDeterminationOfProvedReserves	336344000	USD
CY2011Q4	us-gaap	Capitalized Exploratory Well Costs CapitalizedExploratoryWellCosts	20207000	USD
CY2012Q4	us-gaap	Capitalized Exploratory Well Costs CapitalizedExploratoryWellCosts	40424000	USD
CY2013Q4	us-gaap	Capitalized Exploratory Well Costs CapitalizedExploratoryWellCosts	123215000	USD
CY2014Q4	us-gaap	Capitalized Exploratory Well Costs CapitalizedExploratoryWellCosts	34522000	USD
CY2014Q4	us-gaap	Capitalized Exploratory Well Costs That Have Been Capitalized For Period Greater Than One Year CapitalizedExploratoryWellCostsThatHaveBeenCapitalizedForPeriodGreaterThanOneYear	0	USD
CY2011Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	470872000	USD
CY2012Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	213447000	USD
CY2013Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	91901000	USD
CY2014Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	45811000	USD
CY2012	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-257425000	USD
CY2013	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-121546000	USD
CY2014	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-46090000	USD
CY2013Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2014Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2013Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2014Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2013Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	300000000	shares
CY2014Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	300000000	shares
CY2013Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	100866589	shares
CY2014Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	101627296	shares
CY2013Q4	us-gaap	Common Stock Value CommonStockValue	996000	USD
CY2014Q4	us-gaap	Common Stock Value CommonStockValue	1001000	USD
CY2012	us-gaap	Costs And Expenses CostsAndExpenses	409675000	USD
CY2013	us-gaap	Costs And Expenses CostsAndExpenses	637601000	USD
CY2014	us-gaap	Costs And Expenses CostsAndExpenses	931575000	USD
CY2012	us-gaap	Costs Incurred Acquisition Of Oil And Gas Properties CostsIncurredAcquisitionOfOilAndGasProperties	1124307000	USD
CY2013	us-gaap	Costs Incurred Acquisition Of Oil And Gas Properties CostsIncurredAcquisitionOfOilAndGasProperties	2494256000	USD
CY2014	us-gaap	Costs Incurred Acquisition Of Oil And Gas Properties CostsIncurredAcquisitionOfOilAndGasProperties	1515204000	USD
CY2012	us-gaap	Costs Incurred Acquisition Of Oil And Gas Properties With Proved Reserves CostsIncurredAcquisitionOfOilAndGasPropertiesWithProvedReserves	3159000	USD
CY2013	us-gaap	Costs Incurred Acquisition Of Oil And Gas Properties With Proved Reserves CostsIncurredAcquisitionOfOilAndGasPropertiesWithProvedReserves	752454000	USD
CY2014	us-gaap	Costs Incurred Acquisition Of Oil And Gas Properties With Proved Reserves CostsIncurredAcquisitionOfOilAndGasPropertiesWithProvedReserves	37048000	USD
CY2012	us-gaap	Costs Incurred Acquisition Of Unproved Oil And Gas Properties CostsIncurredAcquisitionOfUnprovedOilAndGasProperties	34098000	USD
CY2013	us-gaap	Costs Incurred Acquisition Of Unproved Oil And Gas Properties CostsIncurredAcquisitionOfUnprovedOilAndGasProperties	837419000	USD
CY2014	us-gaap	Costs Incurred Acquisition Of Unproved Oil And Gas Properties CostsIncurredAcquisitionOfUnprovedOilAndGasProperties	30891000	USD
CY2012	us-gaap	Costs Incurred Asset Retirement Obligation Incurred CostsIncurredAssetRetirementObligationIncurred	9359000	USD
CY2013	us-gaap	Costs Incurred Asset Retirement Obligation Incurred CostsIncurredAssetRetirementObligationIncurred	11856000	USD
CY2014	us-gaap	Costs Incurred Asset Retirement Obligation Incurred CostsIncurredAssetRetirementObligationIncurred	6278000	USD
CY2012	us-gaap	Costs Incurred Development Costs CostsIncurredDevelopmentCosts	1074441000	USD
CY2013	us-gaap	Costs Incurred Development Costs CostsIncurredDevelopmentCosts	890267000	USD
CY2014	us-gaap	Costs Incurred Development Costs CostsIncurredDevelopmentCosts	1437923000	USD
CY2012	us-gaap	Costs Incurred Exploration Costs CostsIncurredExplorationCosts	3250000	USD
CY2013	us-gaap	Costs Incurred Exploration Costs CostsIncurredExplorationCosts	2260000	USD
CY2014	us-gaap	Costs Incurred Exploration Costs CostsIncurredExplorationCosts	3064000	USD
CY2012	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	0	USD
CY2013	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	475000	USD
CY2014	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	134000	USD
CY2012	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	7000	USD
CY2013	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	475000	USD
CY2014	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	134000	USD
CY2012	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	7000	USD
CY2013	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	0	USD
CY2014	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	0	USD
CY2012	us-gaap	Decrease Due To Sales Of Minerals In Place DecreaseDueToSalesOfMineralsInPlace	0	USD
CY2013	us-gaap	Decrease Due To Sales Of Minerals In Place DecreaseDueToSalesOfMineralsInPlace	0	USD
CY2014	us-gaap	Decrease Due To Sales Of Minerals In Place DecreaseDueToSalesOfMineralsInPlace	251002000	USD
CY2013Q4	us-gaap	Deferred Costs And Other Assets DeferredCostsAndOtherAssets	46169000	USD
CY2014Q4	us-gaap	Deferred Costs And Other Assets DeferredCostsAndOtherAssets	41671000	USD
CY2012	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	82841000	USD
CY2013	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	122853000	USD
CY2014	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	273576000	USD
CY2014Q4	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	35500000	USD
CY2012	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	92479000	USD
CY2013	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	134583000	USD
CY2014	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	307457000	USD
CY2012	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	9638000	USD
CY2013	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	11730000	USD
CY2014	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	33881000	USD
CY2013Q4	us-gaap	Deferred Tax Assets Derivative Instruments DeferredTaxAssetsDerivativeInstruments	1664000	USD
CY2014Q4	us-gaap	Deferred Tax Assets Derivative Instruments DeferredTaxAssetsDerivativeInstruments	0	USD
CY2013Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	26939000	USD
CY2014Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	48024000	USD
CY2013Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	-316812000	USD
CY2014Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	-624269000	USD
CY2013Q4	us-gaap	Deferred Tax Assets Liabilities Net Current DeferredTaxAssetsLiabilitiesNetCurrent	6335000	USD
CY2013Q4	us-gaap	Deferred Tax Assets Net Current DeferredTaxAssetsNetCurrent	6335000	USD
CY2014Q4	us-gaap	Deferred Tax Assets Net Current DeferredTaxAssetsNetCurrent	0	USD
CY2013Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	17215000	USD
CY2014Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	35650000	USD
CY2013Q4	us-gaap	Deferred Tax Assets Other Tax Carryforwards DeferredTaxAssetsOtherTaxCarryforwards	0	USD
CY2014Q4	us-gaap	Deferred Tax Assets Other Tax Carryforwards DeferredTaxAssetsOtherTaxCarryforwards	1349000	USD
CY2013Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Compensation DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation	8060000	USD
CY2014Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Compensation DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation	11025000	USD
CY2014Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	3500000	USD
CY2013Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	343751000	USD
CY2014Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	672293000	USD
CY2013Q4	us-gaap	Deferred Tax Liabilities Current DeferredTaxLiabilitiesCurrent	0	USD
CY2014Q4	us-gaap	Deferred Tax Liabilities Current DeferredTaxLiabilitiesCurrent	97499000	USD
CY2013Q4	us-gaap	Deferred Tax Liabilities Derivatives DeferredTaxLiabilitiesDerivatives	0	USD
CY2014Q4	us-gaap	Deferred Tax Liabilities Derivatives DeferredTaxLiabilitiesDerivatives	105911000	USD
CY2013Q4	us-gaap	Deferred Tax Liabilities Noncurrent DeferredTaxLiabilitiesNoncurrent	323147000	USD
CY2014Q4	us-gaap	Deferred Tax Liabilities Noncurrent DeferredTaxLiabilitiesNoncurrent	526770000	USD
CY2013Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	343751000	USD
CY2014Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	566382000	USD
CY2012	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	206734000	USD
CY2013	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	307055000	USD
CY2014	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	412334000	USD
CY2013Q4	us-gaap	Derivative Assets Current DerivativeAssetsCurrent	2264000	USD
CY2014Q4	us-gaap	Derivative Assets Current DerivativeAssetsCurrent	302159000	USD
CY2013Q4	us-gaap	Derivative Assets Noncurrent DerivativeAssetsNoncurrent	1333000	USD
CY2014Q4	us-gaap	Derivative Assets Noncurrent DerivativeAssetsNoncurrent	13348000	USD
CY2014Q4	us-gaap	Derivative Credit Risk Valuation Adjustment Derivative Assets DerivativeCreditRiskValuationAdjustmentDerivativeAssets	-600000	USD
CY2013Q4	us-gaap	Derivative Credit Risk Valuation Adjustment Derivative Liabilities DerivativeCreditRiskValuationAdjustmentDerivativeLiabilities	200000	USD
CY2014Q4	us-gaap	Derivative Fair Value Of Derivative Net DerivativeFairValueOfDerivativeNet	315507000	USD
CY2012	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	34164000	USD
CY2013	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	-35432000	USD
CY2014	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	327011000	USD
CY2013Q4	us-gaap	Derivative Liabilities Current DerivativeLiabilitiesCurrent	8188000	USD
CY2014Q4	us-gaap	Derivative Liabilities Current DerivativeLiabilitiesCurrent	0	USD
CY2013Q4	us-gaap	Derivative Liabilities Noncurrent DerivativeLiabilitiesNoncurrent	139000	USD
CY2014Q4	us-gaap	Derivative Liabilities Noncurrent DerivativeLiabilitiesNoncurrent	0	USD
CY2013Q4	us-gaap	Disposal Group Including Discontinued Operation Long Lived Assets DisposalGroupIncludingDiscontinuedOperationLongLivedAssets	137066000	USD
CY2014Q4	us-gaap	Disposal Group Including Discontinued Operation Long Lived Assets DisposalGroupIncludingDiscontinuedOperationLongLivedAssets	0	USD
CY2013Q4	us-gaap	Disposal Group Including Discontinued Operation Long Lived Assets Noncurrent DisposalGroupIncludingDiscontinuedOperationLongLivedAssetsNoncurrent	137066000	USD
CY2014Q4	us-gaap	Due From Affiliate Current DueFromAffiliateCurrent	0	USD
CY2012	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.66
CY2013	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.45
CY2014	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	5.09
CY2012	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.66
CY2013	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.44
CY2014	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	5.05
CY2012	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.3762
CY2013	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.3720
CY2014	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.3776
CY2012	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35
CY2013	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35
CY2014	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35
CY2012	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Other EffectiveIncomeTaxRateReconciliationNondeductibleExpenseOther	0.0015
CY2013	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Other EffectiveIncomeTaxRateReconciliationNondeductibleExpenseOther	0.0014
CY2014	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Other EffectiveIncomeTaxRateReconciliationNondeductibleExpenseOther	-0.0005
CY2012	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.0247
CY2013	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.0206
CY2014	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.0281
CY2012	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	4000000	USD
CY2013	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	4500000	USD
CY2014	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	8400000	USD
CY2013Q4	us-gaap	Energy Related Inventory Petroleum EnergyRelatedInventoryPetroleum	8983000	USD
CY2014Q4	us-gaap	Energy Related Inventory Petroleum EnergyRelatedInventoryPetroleum	7129000	USD
CY2012	us-gaap	Exploration Expense ExplorationExpense	3250000	USD
CY2013	us-gaap	Exploration Expense ExplorationExpense	2260000	USD
CY2014	us-gaap	Exploration Expense ExplorationExpense	3064000	USD
CY2012	us-gaap	Extensions Discoveries Additions And Improved Recovery Less Related Costs ExtensionsDiscoveriesAdditionsAndImprovedRecoveryLessRelatedCosts	0	USD
CY2013	us-gaap	Extensions Discoveries Additions And Improved Recovery Less Related Costs ExtensionsDiscoveriesAdditionsAndImprovedRecoveryLessRelatedCosts	0	USD
CY2014	us-gaap	Extensions Discoveries Additions And Improved Recovery Less Related Costs ExtensionsDiscoveriesAdditionsAndImprovedRecoveryLessRelatedCosts	0	USD
CY2014Q4	us-gaap	Financing Receivable Recorded Investment Past Due FinancingReceivableRecordedInvestmentPastDue	0	USD
CY2012Q4	us-gaap	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Cash Inflows FutureNetCashFlowsRelatingToProvedOilAndGasReservesCashInflows	11321992000	USD
CY2013Q4	us-gaap	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Cash Inflows FutureNetCashFlowsRelatingToProvedOilAndGasReservesCashInflows	19063500000	USD
CY2014Q4	us-gaap	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Cash Inflows FutureNetCashFlowsRelatingToProvedOilAndGasReservesCashInflows	21656832000	USD
CY2012Q4	us-gaap	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Development Costs FutureNetCashFlowsRelatingToProvedOilAndGasReservesDevelopmentCosts	1434648000	USD
CY2013Q4	us-gaap	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Development Costs FutureNetCashFlowsRelatingToProvedOilAndGasReservesDevelopmentCosts	1904095000	USD
CY2014Q4	us-gaap	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Development Costs FutureNetCashFlowsRelatingToProvedOilAndGasReservesDevelopmentCosts	2563062000	USD
CY2012Q4	us-gaap	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Income Tax Expense FutureNetCashFlowsRelatingToProvedOilAndGasReservesIncomeTaxExpense	2123973000	USD
CY2013Q4	us-gaap	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Income Tax Expense FutureNetCashFlowsRelatingToProvedOilAndGasReservesIncomeTaxExpense	3628977000	USD
CY2014Q4	us-gaap	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Income Tax Expense FutureNetCashFlowsRelatingToProvedOilAndGasReservesIncomeTaxExpense	3188389000	USD
CY2012Q4	us-gaap	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Net Cash Flows FutureNetCashFlowsRelatingToProvedOilAndGasReservesNetCashFlows	4953411000	USD
CY2013Q4	us-gaap	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Net Cash Flows FutureNetCashFlowsRelatingToProvedOilAndGasReservesNetCashFlows	8056661000	USD
CY2014Q4	us-gaap	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Net Cash Flows FutureNetCashFlowsRelatingToProvedOilAndGasReservesNetCashFlows	8810955000	USD
CY2012Q4	us-gaap	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Production Costs FutureNetCashFlowsRelatingToProvedOilAndGasReservesProductionCosts	2809960000	USD
CY2013Q4	us-gaap	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Production Costs FutureNetCashFlowsRelatingToProvedOilAndGasReservesProductionCosts	5473767000	USD
CY2014Q4	us-gaap	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Production Costs FutureNetCashFlowsRelatingToProvedOilAndGasReservesProductionCosts	7094426000	USD
CY2012Q4	us-gaap	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Ten Percent Annual Discount For Estimated Timing Of Cash Flows FutureNetCashFlowsRelatingToProvedOilAndGasReservesTenPercentAnnualDiscountForEstimatedTimingOfCashFlows	2693514000	USD
CY2013Q4	us-gaap	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Ten Percent Annual Discount For Estimated Timing Of Cash Flows FutureNetCashFlowsRelatingToProvedOilAndGasReservesTenPercentAnnualDiscountForEstimatedTimingOfCashFlows	4329102000	USD
CY2014Q4	us-gaap	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Ten Percent Annual Discount For Estimated Timing Of Cash Flows FutureNetCashFlowsRelatingToProvedOilAndGasReservesTenPercentAnnualDiscountForEstimatedTimingOfCashFlows	4829294000	USD
CY2012	us-gaap	Gain Loss On Sale Of Property GainLossOnSaleOfProperty	0	USD
CY2012	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	6068000	USD
CY2013	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	7469000	USD
CY2014	us-gaap	Income Tax Reconciliation Nondeductible Expense Other IncomeTaxReconciliationNondeductibleExpenseOther	-374000	USD
CY2013	us-gaap	Gain Loss On Sale Of Property GainLossOnSaleOfProperty	0	USD
CY2014	us-gaap	Gain Loss On Sale Of Property GainLossOnSaleOfProperty	186999000	USD
CY2012	us-gaap	Gas Gathering Transportation Marketing And Processing Costs GasGatheringTransportationMarketingAndProcessingCosts	9257000	USD
CY2013	us-gaap	Gas Gathering Transportation Marketing And Processing Costs GasGatheringTransportationMarketingAndProcessingCosts	25924000	USD
CY2014	us-gaap	Gas Gathering Transportation Marketing And Processing Costs GasGatheringTransportationMarketingAndProcessingCosts	29133000	USD
CY2012	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	57190000	USD
CY2013	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	75310000	USD
CY2014	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	92306000	USD
CY2012	us-gaap	Impairment Of Oil And Gas Properties ImpairmentOfOilAndGasProperties	3581000	USD
CY2013	us-gaap	Impairment Of Oil And Gas Properties ImpairmentOfOilAndGasProperties	1168000	USD
CY2014	us-gaap	Impairment Of Oil And Gas Properties ImpairmentOfOilAndGasProperties	47238000	USD
CY2012	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	245874000	USD
CY2013	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	363017000	USD
CY2014	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	814468000	USD
CY2012	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	92486000	USD
CY2013	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	135058000	USD
CY2014	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	307591000	USD
CY2012	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	86056000	USD
CY2013	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	127056000	USD
CY2014	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	285064000	USD
CY2012	us-gaap	Income Tax Reconciliation Nondeductible Expense Other IncomeTaxReconciliationNondeductibleExpenseOther	362000	USD
CY2013	us-gaap	Income Tax Reconciliation Nondeductible Expense Other IncomeTaxReconciliationNondeductibleExpenseOther	533000	USD
CY2014	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	22901000	USD
CY2012	us-gaap	Income Taxes Paid IncomeTaxesPaid	107000	USD
CY2013	us-gaap	Income Taxes Paid IncomeTaxesPaid	750000	USD
CY2014	us-gaap	Income Taxes Paid IncomeTaxesPaid	5329000	USD
CY2012	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	76706000	USD
CY2013	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	107451000	USD
CY2014	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	76723000	USD
CY2012	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	90103000	USD
CY2013	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	107473000	USD
CY2014	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-16702000	USD
CY2012	us-gaap	Increase Decrease In Estimated Future Development Costs IncreaseDecreaseInEstimatedFutureDevelopmentCosts	28124000	USD
CY2013	us-gaap	Increase Decrease In Estimated Future Development Costs IncreaseDecreaseInEstimatedFutureDevelopmentCosts	57566000	USD
CY2014	us-gaap	Increase Decrease In Estimated Future Development Costs IncreaseDecreaseInEstimatedFutureDevelopmentCosts	-61760000	USD
CY2012	us-gaap	Increase Decrease In Future Income Tax Expense Estimates On Future Cash Flows Related To Proved Oil And Gas Reserves IncreaseDecreaseInFutureIncomeTaxExpenseEstimatesOnFutureCashFlowsRelatedToProvedOilAndGasReserves	-400196000	USD
CY2013	us-gaap	Increase Decrease In Future Income Tax Expense Estimates On Future Cash Flows Related To Proved Oil And Gas Reserves IncreaseDecreaseInFutureIncomeTaxExpenseEstimatesOnFutureCashFlowsRelatedToProvedOilAndGasReserves	-774910000	USD
CY2014	us-gaap	Increase Decrease In Future Income Tax Expense Estimates On Future Cash Flows Related To Proved Oil And Gas Reserves IncreaseDecreaseInFutureIncomeTaxExpenseEstimatesOnFutureCashFlowsRelatedToProvedOilAndGasReserves	259592000	USD
CY2012	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	29313000	USD
CY2013	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	13941000	USD
CY2014	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	3776000	USD
CY2012	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	-156000	USD
CY2013	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	56000	USD
CY2013	us-gaap	Increase Decrease In Other Current Liabilities IncreaseDecreaseInOtherCurrentLiabilities	0	USD
CY2014	us-gaap	Increase Decrease In Other Current Liabilities IncreaseDecreaseInOtherCurrentLiabilities	0	USD
CY2012	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	95000	USD
CY2013	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	3248000	USD
CY2014	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	6135000	USD
CY2012	us-gaap	Increase Decrease In Other Current Liabilities IncreaseDecreaseInOtherCurrentLiabilities	-472000	USD
CY2014	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-114000	USD
CY2012	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	0	USD
CY2013	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	887000	USD
CY2014	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-139000	USD
CY2012	us-gaap	Increase Decrease In Prepaid Expense IncreaseDecreaseInPrepaidExpense	-346000	USD
CY2014	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	158846000	USD
CY2013	us-gaap	Increase Decrease In Prepaid Expense IncreaseDecreaseInPrepaidExpense	8191000	USD
CY2014	us-gaap	Increase Decrease In Prepaid Expense IncreaseDecreaseInPrepaidExpense	3199000	USD
CY2012	us-gaap	Increase Due To Purchases Of Minerals In Place IncreaseDueToPurchasesOfMineralsInPlace	15890000	USD
CY2013	us-gaap	Increase Due To Purchases Of Minerals In Place IncreaseDueToPurchasesOfMineralsInPlace	858382000	USD
CY2014	us-gaap	Increase Due To Purchases Of Minerals In Place IncreaseDueToPurchasesOfMineralsInPlace	38035000	USD
CY2012	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	3300000	USD
CY2013	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	4600000	USD
CY2014	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	8800000	USD
CY2012	us-gaap	Interest Expense InterestExpense	70143000	USD
CY2013	us-gaap	Interest Expense InterestExpense	107165000	USD
CY2014	us-gaap	Interest Expense InterestExpense	158390000	USD
CY2012	us-gaap	Interest Paid Net InterestPaidNet	53488000	USD
CY2013	us-gaap	Interest Paid Net InterestPaidNet	85596000	USD
CY2014	us-gaap	Interest Paid Net InterestPaidNet	150181000	USD
CY2013Q4	us-gaap	Interest Payable Current InterestPayableCurrent	47910000	USD
CY2014Q4	us-gaap	Interest Payable Current InterestPayableCurrent	49786000	USD
CY2013Q4	us-gaap	Inventory Net InventoryNet	20652000	USD
CY2014Q4	us-gaap	Inventory Net InventoryNet	21354000	USD
CY2012	us-gaap	Lease Operating Expense LeaseOperatingExpense	54924000	USD
CY2013	us-gaap	Lease Operating Expense LeaseOperatingExpense	94634000	USD
CY2014	us-gaap	Lease Operating Expense LeaseOperatingExpense	169600000	USD
CY2013Q4	us-gaap	Liabilities Liabilities	3363375000	USD
CY2014Q4	us-gaap	Liabilities Liabilities	4066111000	USD
CY2013Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	4711924000	USD
CY2014Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	5938412000	USD
CY2013Q4	us-gaap	Liabilities Current LiabilitiesCurrent	466418000	USD
CY2014Q4	us-gaap	Liabilities Current LiabilitiesCurrent	795128000	USD
CY2013Q4	us-gaap	Liabilities Fair Value Disclosure LiabilitiesFairValueDisclosure	8327000	USD
CY2013Q4	us-gaap	Liabilities Of Disposal Group Including Discontinued Operation LiabilitiesOfDisposalGroupIncludingDiscontinuedOperation	1973000	USD
CY2013Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	2535570000	USD
CY2014Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	2700000000	USD
CY2012	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	388794000	USD
CY2013	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	1625674000	USD
CY2012	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-1038605000	USD
CY2013	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-2445076000	USD
CY2014	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-1077452000	USD
CY2012	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	392386000	USD
CY2013	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	697856000	USD
CY2014	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	872516000	USD
CY2012	us-gaap	Net Income Loss NetIncomeLoss	153388000	USD
CY2013Q1	us-gaap	Net Income Loss NetIncomeLoss	51851000	USD
CY2013Q2	us-gaap	Net Income Loss NetIncomeLoss	67119000	USD
CY2013Q3	us-gaap	Net Income Loss NetIncomeLoss	54499000	USD
CY2013Q4	us-gaap	Net Income Loss NetIncomeLoss	54490000	USD
CY2014	us-gaap	Oil And Gas Sales Revenue OilAndGasSalesRevenue	1304004000	USD
CY2012	us-gaap	Operating Income Loss OperatingIncomeLoss	276993000	USD
CY2013Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	117953000	USD
CY2013	us-gaap	Oil And Gas Sales Revenue OilAndGasSalesRevenue	1084412000	USD
CY2013	us-gaap	Net Income Loss NetIncomeLoss	227959000	USD
CY2014Q1	us-gaap	Net Income Loss NetIncomeLoss	169953000	USD
CY2014Q2	us-gaap	Net Income Loss NetIncomeLoss	38833000	USD
CY2014Q3	us-gaap	Net Income Loss NetIncomeLoss	121587000	USD
CY2014Q4	us-gaap	Net Income Loss NetIncomeLoss	176504000	USD
CY2014	us-gaap	Net Income Loss NetIncomeLoss	506877000	USD
CY2012	us-gaap	Net Increase Decrease In Sales And Transfer Prices And Production Costs NetIncreaseDecreaseInSalesAndTransferPricesAndProductionCosts	-7814000	USD
CY2013	us-gaap	Net Increase Decrease In Sales And Transfer Prices And Production Costs NetIncreaseDecreaseInSalesAndTransferPricesAndProductionCosts	254979000	USD
CY2014	us-gaap	Net Increase Decrease In Sales And Transfer Prices And Production Costs NetIncreaseDecreaseInSalesAndTransferPricesAndProductionCosts	-588212000	USD
CY2012	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-31119000	USD
CY2013	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-141381000	USD
CY2014	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	168816000	USD
CY2014	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	3	Segment
CY2013Q4	us-gaap	Oil And Gas Joint Interest Billing Receivables Current OilAndGasJointInterestBillingReceivablesCurrent	139459000	USD
CY2014Q4	us-gaap	Oil And Gas Joint Interest Billing Receivables Current OilAndGasJointInterestBillingReceivablesCurrent	175537000	USD
CY2013Q4	us-gaap	Oil And Gas Property Successful Effort Method Accumulated Depreciation Depletion And Amortization OilAndGasPropertySuccessfulEffortMethodAccumulatedDepreciationDepletionAndAmortization	612380000	USD
CY2014Q4	us-gaap	Oil And Gas Property Successful Effort Method Accumulated Depreciation Depletion And Amortization OilAndGasPropertySuccessfulEffortMethodAccumulatedDepreciationDepletionAndAmortization	1043121000	USD
CY2013Q4	us-gaap	Oil And Gas Property Successful Effort Method Gross OilAndGasPropertySuccessfulEffortMethodGross	4528958000	USD
CY2014Q4	us-gaap	Oil And Gas Property Successful Effort Method Gross OilAndGasPropertySuccessfulEffortMethodGross	5966140000	USD
CY2012	us-gaap	Oil And Gas Revenue OilAndGasRevenue	686668000	USD
CY2013Q1	us-gaap	Oil And Gas Revenue OilAndGasRevenue	248304000	USD
CY2013Q2	us-gaap	Oil And Gas Revenue OilAndGasRevenue	254582000	USD
CY2013Q3	us-gaap	Oil And Gas Revenue OilAndGasRevenue	305498000	USD
CY2013Q4	us-gaap	Oil And Gas Revenue OilAndGasRevenue	333615000	USD
CY2013	us-gaap	Oil And Gas Revenue OilAndGasRevenue	1141999000	USD
CY2014Q1	us-gaap	Oil And Gas Revenue OilAndGasRevenue	349519000	USD
CY2014Q2	us-gaap	Oil And Gas Revenue OilAndGasRevenue	372378000	USD
CY2014Q3	us-gaap	Oil And Gas Revenue OilAndGasRevenue	368659000	USD
CY2014Q4	us-gaap	Oil And Gas Revenue OilAndGasRevenue	299672000	USD
CY2014	us-gaap	Oil And Gas Revenue OilAndGasRevenue	1390228000	USD
CY2012	us-gaap	Oil And Gas Sales Revenue OilAndGasSalesRevenue	670491000	USD
CY2013Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	113450000	USD
CY2013Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	150862000	USD
CY2013Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	122133000	USD
CY2013	us-gaap	Operating Income Loss OperatingIncomeLoss	504398000	USD
CY2014Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	329080000	USD
CY2014Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	166545000	USD
CY2014Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	134103000	USD
CY2014Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	15924000	USD
CY2014	us-gaap	Operating Income Loss OperatingIncomeLoss	645652000	USD
CY2014Q4	us-gaap	Operating Leases Future Minimum Payments Due Current OperatingLeasesFutureMinimumPaymentsDueCurrent	9628000	USD
CY2014Q4	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	4997000	USD
CY2014Q4	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	4941000	USD
CY2014Q4	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	4621000	USD
CY2014Q4	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	6384000	USD
CY2014Q4	us-gaap	Operating Leases Future Minimum Payments Due OperatingLeasesFutureMinimumPaymentsDue	34314000	USD
CY2013	us-gaap	Payments To Explore And Develop Oil And Gas Properties PaymentsToExploreAndDevelopOilAndGasProperties	893524000	USD
CY2014	us-gaap	Payments To Acquire Oil And Gas Property PaymentsToAcquireOilAndGasProperty	46247000	USD
CY2012	us-gaap	Payments To Acquire Short Term Investments PaymentsToAcquireShortTermInvestments	126213000	USD
CY2013	us-gaap	Payments To Acquire Short Term Investments PaymentsToAcquireShortTermInvestments	0	USD
CY2014	us-gaap	Payments To Acquire Short Term Investments PaymentsToAcquireShortTermInvestments	0	USD
CY2012	us-gaap	Payments To Explore And Develop Oil And Gas Properties PaymentsToExploreAndDevelopOilAndGasProperties	1051365000	USD
CY2012	us-gaap	Proceeds From Issuance Of Senior Long Term Debt ProceedsFromIssuanceOfSeniorLongTermDebt	400000000	USD
CY2014Q4	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	3743000	USD
CY2012	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	1500000	USD
CY2013	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	1600000	USD
CY2014	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	2000000	USD
CY2014Q4	us-gaap	Operating Loss Carryforwards OperatingLossCarryforwards	30200000	USD
CY2013Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	9882000	USD
CY2014Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	10414000	USD
CY2013Q4	us-gaap	Other Assets Current OtherAssetsCurrent	391000	USD
CY2014Q4	us-gaap	Other Assets Current OtherAssetsCurrent	6526000	USD
CY2013Q4	us-gaap	Other Inventory Supplies OtherInventorySupplies	11669000	USD
CY2014Q4	us-gaap	Other Inventory Supplies OtherInventorySupplies	14225000	USD
CY2013Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	2183000	USD
CY2014Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	2116000	USD
CY2012	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	4860000	USD
CY2013	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	1216000	USD
CY2014	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	195000	USD
CY2012	us-gaap	Payments For Proceeds From Derivative Instrument Investing Activities PaymentsForProceedsFromDerivativeInstrumentInvestingActivities	-6545000	USD
CY2013	us-gaap	Payments For Proceeds From Derivative Instrument Investing Activities PaymentsForProceedsFromDerivativeInstrumentInvestingActivities	8133000	USD
CY2014	us-gaap	Payments For Proceeds From Derivative Instrument Investing Activities PaymentsForProceedsFromDerivativeInstrumentInvestingActivities	-6774000	USD
CY2012	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	8012000	USD
CY2013	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	22910000	USD
CY2014	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	99000	USD
CY2012	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	3194000	USD
CY2013	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	1566000	USD
CY2014	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	5309000	USD
CY2012	us-gaap	Payments To Acquire Oil And Gas Property PaymentsToAcquireOilAndGasProperty	0	USD
CY2013	us-gaap	Payments To Acquire Oil And Gas Property PaymentsToAcquireOilAndGasProperty	1560072000	USD
CY2014	us-gaap	Payments To Explore And Develop Oil And Gas Properties PaymentsToExploreAndDevelopOilAndGasProperties	1354281000	USD
CY2013Q4	us-gaap	Prepaid Expense Current PrepaidExpenseCurrent	10191000	USD
CY2014Q4	us-gaap	Prepaid Expense Current PrepaidExpenseCurrent	14273000	USD
CY2012	us-gaap	Previously Estimated Development Costs Incurred During Period PreviouslyEstimatedDevelopmentCostsIncurredDuringPeriod	480925000	USD
CY2013	us-gaap	Previously Estimated Development Costs Incurred During Period PreviouslyEstimatedDevelopmentCostsIncurredDuringPeriod	373912000	USD
CY2014	us-gaap	Previously Estimated Development Costs Incurred During Period PreviouslyEstimatedDevelopmentCostsIncurredDuringPeriod	249926000	USD
CY2012	us-gaap	Proceeds From Divestiture Of Businesses ProceedsFromDivestitureOfBusinesses	0	USD
CY2013	us-gaap	Proceeds From Divestiture Of Businesses ProceedsFromDivestitureOfBusinesses	0	USD
CY2014	us-gaap	Proceeds From Divestiture Of Businesses ProceedsFromDivestitureOfBusinesses	324852000	USD
CY2012	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	0	USD
CY2013	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	314580000	USD
CY2014	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	0	USD
CY2013	us-gaap	Proceeds From Issuance Of Senior Long Term Debt ProceedsFromIssuanceOfSeniorLongTermDebt	1000000000	USD
CY2014	us-gaap	Proceeds From Issuance Of Senior Long Term Debt ProceedsFromIssuanceOfSeniorLongTermDebt	0	USD
CY2012	us-gaap	Proceeds From Long Term Lines Of Credit ProceedsFromLongTermLinesOfCredit	0	USD
CY2013	us-gaap	Proceeds From Long Term Lines Of Credit ProceedsFromLongTermLinesOfCredit	600000000	USD
CY2014	us-gaap	Proceeds From Long Term Lines Of Credit ProceedsFromLongTermLinesOfCredit	620000000	USD
CY2012	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	0	USD
CY2013	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	0	USD
CY2014	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-176000	USD
CY2012	us-gaap	Proceeds From Sale Maturity And Collection Of Shortterm Investments ProceedsFromSaleMaturityAndCollectionOfShorttermInvestments	120316000	USD
CY2013	us-gaap	Proceeds From Sale Maturity And Collection Of Shortterm Investments ProceedsFromSaleMaturityAndCollectionOfShorttermInvestments	25000000	USD
CY2014	us-gaap	Proceeds From Sale Maturity And Collection Of Shortterm Investments ProceedsFromSaleMaturityAndCollectionOfShorttermInvestments	0	USD
CY2014	us-gaap	Proceeds From Sale Of Oil And Gas Property And Equipment ProceedsFromSaleOfOilAndGasPropertyAndEquipment	324852000	USD
CY2012	us-gaap	Production Tax Expense ProductionTaxExpense	62965000	USD
CY2013	us-gaap	Production Tax Expense ProductionTaxExpense	100537000	USD
CY2014	us-gaap	Production Tax Expense ProductionTaxExpense	127648000	USD
CY2013Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	4079750000	USD
CY2014Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	5186786000	USD
CY2013Q4	us-gaap	Property Plant And Equipment Other PropertyPlantAndEquipmentOther	188468000	USD
CY2014Q4	us-gaap	Property Plant And Equipment Other PropertyPlantAndEquipmentOther	313439000	USD
CY2013Q4	us-gaap	Property Plant And Equipment Other Accumulated Depreciation PropertyPlantAndEquipmentOtherAccumulatedDepreciation	25296000	USD
CY2014Q4	us-gaap	Property Plant And Equipment Other Accumulated Depreciation PropertyPlantAndEquipmentOtherAccumulatedDepreciation	49672000	USD
CY2013Q4	us-gaap	Property Plant And Equipment Other Net PropertyPlantAndEquipmentOtherNet	163172000	USD
CY2014Q4	us-gaap	Property Plant And Equipment Other Net PropertyPlantAndEquipmentOtherNet	263767000	USD
CY2012	us-gaap	Proved Developed And Undeveloped Reserve Extension And Discovery Energy ProvedDevelopedAndUndevelopedReserveExtensionAndDiscoveryEnergy	73871	MBoe
CY2013	us-gaap	Proved Developed And Undeveloped Reserve Extension And Discovery Energy ProvedDevelopedAndUndevelopedReserveExtensionAndDiscoveryEnergy	46094	MBoe
CY2014	us-gaap	Proved Developed And Undeveloped Reserve Extension And Discovery Energy ProvedDevelopedAndUndevelopedReserveExtensionAndDiscoveryEnergy	92596	MBoe
CY2011Q4	us-gaap	Proved Developed And Undeveloped Reserve Net Energy ProvedDevelopedAndUndevelopedReserveNetEnergy	78715	MBoe
CY2012Q4	us-gaap	Proved Developed And Undeveloped Reserve Net Energy ProvedDevelopedAndUndevelopedReserveNetEnergy	143345	MBoe
CY2013Q4	us-gaap	Proved Developed And Undeveloped Reserve Net Energy ProvedDevelopedAndUndevelopedReserveNetEnergy	227920	MBoe
CY2014Q4	us-gaap	Proved Developed And Undeveloped Reserve Net Energy ProvedDevelopedAndUndevelopedReserveNetEnergy	272086	MBoe
CY2012	us-gaap	Proved Developed And Undeveloped Reserve Production Energy ProvedDevelopedAndUndevelopedReserveProductionEnergy	8224	MBoe
CY2013	us-gaap	Proved Developed And Undeveloped Reserve Production Energy ProvedDevelopedAndUndevelopedReserveProductionEnergy	12375	MBoe
CY2014	us-gaap	Proved Developed And Undeveloped Reserve Production Energy ProvedDevelopedAndUndevelopedReserveProductionEnergy	16664	MBoe
CY2012	us-gaap	Proved Developed And Undeveloped Reserve Purchase Of Mineral In Place Energy ProvedDevelopedAndUndevelopedReservePurchaseOfMineralInPlaceEnergy	966	MBoe
CY2013	us-gaap	Proved Developed And Undeveloped Reserve Purchase Of Mineral In Place Energy ProvedDevelopedAndUndevelopedReservePurchaseOfMineralInPlaceEnergy	45731	MBoe
CY2014	us-gaap	Proved Developed And Undeveloped Reserve Purchase Of Mineral In Place Energy ProvedDevelopedAndUndevelopedReservePurchaseOfMineralInPlaceEnergy	1799	MBoe
CY2012	us-gaap	Proved Developed And Undeveloped Reserve Revision Of Previous Estimate Energy ProvedDevelopedAndUndevelopedReserveRevisionOfPreviousEstimateEnergy	1983	MBoe
CY2013	us-gaap	Proved Developed And Undeveloped Reserve Revision Of Previous Estimate Energy ProvedDevelopedAndUndevelopedReserveRevisionOfPreviousEstimateEnergy	-5125	MBoe
CY2014	us-gaap	Proved Developed And Undeveloped Reserve Revision Of Previous Estimate Energy ProvedDevelopedAndUndevelopedReserveRevisionOfPreviousEstimateEnergy	25117	MBoe
CY2012	us-gaap	Proved Developed And Undeveloped Reserves Extensions Discoveries And Additions ProvedDevelopedAndUndevelopedReservesExtensionsDiscoveriesAndAdditions	66245	MBbls
CY2012	us-gaap	Proved Developed And Undeveloped Reserves Extensions Discoveries And Additions ProvedDevelopedAndUndevelopedReservesExtensionsDiscoveriesAndAdditions	45759	MMcf
CY2013	us-gaap	Proved Developed And Undeveloped Reserves Extensions Discoveries And Additions ProvedDevelopedAndUndevelopedReservesExtensionsDiscoveriesAndAdditions	40784	MBbls
CY2013	us-gaap	Proved Developed And Undeveloped Reserves Extensions Discoveries And Additions ProvedDevelopedAndUndevelopedReservesExtensionsDiscoveriesAndAdditions	31856	MMcf
CY2014	us-gaap	Proved Developed And Undeveloped Reserves Extensions Discoveries And Additions ProvedDevelopedAndUndevelopedReservesExtensionsDiscoveriesAndAdditions	80855	MBbls
CY2014	us-gaap	Proved Developed And Undeveloped Reserves Extensions Discoveries And Additions ProvedDevelopedAndUndevelopedReservesExtensionsDiscoveriesAndAdditions	70449	MMcf
CY2011Q4	us-gaap	Proved Developed And Undeveloped Reserves Net ProvedDevelopedAndUndevelopedReservesNet	69064	MBbls
CY2011Q4	us-gaap	Proved Developed And Undeveloped Reserves Net ProvedDevelopedAndUndevelopedReservesNet	57900	MMcf
CY2012Q4	us-gaap	Proved Developed And Undeveloped Reserves Net ProvedDevelopedAndUndevelopedReservesNet	128090	MBbls
CY2012Q4	us-gaap	Proved Developed And Undeveloped Reserves Net ProvedDevelopedAndUndevelopedReservesNet	91530	MMcf
CY2014	us-gaap	Proved Developed And Undeveloped Reserves Production ProvedDevelopedAndUndevelopedReservesProduction	14883	MBbls
CY2014	us-gaap	Proved Developed And Undeveloped Reserves Production ProvedDevelopedAndUndevelopedReservesProduction	10691	MMcf
CY2013Q4	us-gaap	Proved Developed And Undeveloped Reserves Net ProvedDevelopedAndUndevelopedReservesNet	198590	MBbls
CY2013Q4	us-gaap	Proved Developed And Undeveloped Reserves Net ProvedDevelopedAndUndevelopedReservesNet	175979	MMcf
CY2014Q4	us-gaap	Proved Developed And Undeveloped Reserves Net ProvedDevelopedAndUndevelopedReservesNet	235399	MBbls
CY2014Q4	us-gaap	Proved Developed And Undeveloped Reserves Net ProvedDevelopedAndUndevelopedReservesNet	220120	MMcf
CY2012	us-gaap	Proved Developed And Undeveloped Reserves Production ProvedDevelopedAndUndevelopedReservesProduction	7533	MBbls
CY2012	us-gaap	Proved Developed And Undeveloped Reserves Production ProvedDevelopedAndUndevelopedReservesProduction	4146	MMcf
CY2013	us-gaap	Proved Developed And Undeveloped Reserves Production ProvedDevelopedAndUndevelopedReservesProduction	11133	MBbls
CY2013	us-gaap	Proved Developed And Undeveloped Reserves Production ProvedDevelopedAndUndevelopedReservesProduction	7450	MMcf
CY2013	us-gaap	Results Of Operations Depreciation Depletion And Amortization And Valuation Provisions ResultsOfOperationsDepreciationDepletionAndAmortizationAndValuationProvisions	298999000	USD
CY2014	us-gaap	Results Of Operations Depreciation Depletion And Amortization And Valuation Provisions ResultsOfOperationsDepreciationDepletionAndAmortizationAndValuationProvisions	400118000	USD
CY2014Q4	us-gaap	Proved Developed Reserves Volume ProvedDevelopedReservesVolume	127340	MBbls
CY2014Q4	us-gaap	Proved Developed Reserves Volume ProvedDevelopedReservesVolume	114016	MMcf
CY2012	us-gaap	Proved Developed And Undeveloped Reserves Purchases Of Minerals In Place ProvedDevelopedAndUndevelopedReservesPurchasesOfMineralsInPlace	881	MBbls
CY2012	us-gaap	Proved Developed And Undeveloped Reserves Purchases Of Minerals In Place ProvedDevelopedAndUndevelopedReservesPurchasesOfMineralsInPlace	512	MMcf
CY2013	us-gaap	Proved Developed And Undeveloped Reserves Purchases Of Minerals In Place ProvedDevelopedAndUndevelopedReservesPurchasesOfMineralsInPlace	49631	MMcf
CY2013	us-gaap	Proved Developed And Undeveloped Reserves Purchases Of Minerals In Place ProvedDevelopedAndUndevelopedReservesPurchasesOfMineralsInPlace	37459	MBbls
CY2014	us-gaap	Proved Developed And Undeveloped Reserves Purchases Of Minerals In Place ProvedDevelopedAndUndevelopedReservesPurchasesOfMineralsInPlace	1523	MMcf
CY2014	us-gaap	Proved Developed And Undeveloped Reserves Purchases Of Minerals In Place ProvedDevelopedAndUndevelopedReservesPurchasesOfMineralsInPlace	1546	MBbls
CY2012	us-gaap	Proved Developed And Undeveloped Reserves Revisions Of Previous Estimates Increase Decrease ProvedDevelopedAndUndevelopedReservesRevisionsOfPreviousEstimatesIncreaseDecrease	567	MBbls
CY2012	us-gaap	Proved Developed And Undeveloped Reserves Revisions Of Previous Estimates Increase Decrease ProvedDevelopedAndUndevelopedReservesRevisionsOfPreviousEstimatesIncreaseDecrease	8495	MMcf
CY2013	us-gaap	Proved Developed And Undeveloped Reserves Revisions Of Previous Estimates Increase Decrease ProvedDevelopedAndUndevelopedReservesRevisionsOfPreviousEstimatesIncreaseDecrease	-10412	MMcf
CY2013	us-gaap	Proved Developed And Undeveloped Reserves Revisions Of Previous Estimates Increase Decrease ProvedDevelopedAndUndevelopedReservesRevisionsOfPreviousEstimatesIncreaseDecrease	-3390	MBbls
CY2014	us-gaap	Proved Developed And Undeveloped Reserves Revisions Of Previous Estimates Increase Decrease ProvedDevelopedAndUndevelopedReservesRevisionsOfPreviousEstimatesIncreaseDecrease	12290	MMcf
CY2014	us-gaap	Proved Developed And Undeveloped Reserves Revisions Of Previous Estimates Increase Decrease ProvedDevelopedAndUndevelopedReservesRevisionsOfPreviousEstimatesIncreaseDecrease	23069	MBbls
CY2014Q1	us-gaap	Proved Developed And Undeveloped Reserves Sale Of Mineral In Place Energy ProvedDevelopedAndUndevelopedReservesSaleOfMineralInPlaceEnergy	8448	MBoe
CY2012	us-gaap	Proved Developed And Undeveloped Reserves Sale Of Mineral In Place Energy ProvedDevelopedAndUndevelopedReservesSaleOfMineralInPlaceEnergy	0	MBoe
CY2013	us-gaap	Proved Developed And Undeveloped Reserves Sale Of Mineral In Place Energy ProvedDevelopedAndUndevelopedReservesSaleOfMineralInPlaceEnergy	0	MBoe
CY2014	us-gaap	Proved Developed And Undeveloped Reserves Sale Of Mineral In Place Energy ProvedDevelopedAndUndevelopedReservesSaleOfMineralInPlaceEnergy	8448	MBoe
CY2012	us-gaap	Proved Developed And Undeveloped Reserves Sales Of Minerals In Place ProvedDevelopedAndUndevelopedReservesSalesOfMineralsInPlace	0	MBbls
CY2012	us-gaap	Proved Developed And Undeveloped Reserves Sales Of Minerals In Place ProvedDevelopedAndUndevelopedReservesSalesOfMineralsInPlace	0	MMcf
CY2013	us-gaap	Proved Developed And Undeveloped Reserves Sales Of Minerals In Place ProvedDevelopedAndUndevelopedReservesSalesOfMineralsInPlace	0	MMcf
CY2013	us-gaap	Proved Developed And Undeveloped Reserves Sales Of Minerals In Place ProvedDevelopedAndUndevelopedReservesSalesOfMineralsInPlace	0	MBbls
CY2014	us-gaap	Proved Developed And Undeveloped Reserves Sales Of Minerals In Place ProvedDevelopedAndUndevelopedReservesSalesOfMineralsInPlace	7640	MBbls
CY2014	us-gaap	Proved Developed And Undeveloped Reserves Sales Of Minerals In Place ProvedDevelopedAndUndevelopedReservesSalesOfMineralsInPlace	4850	MMcf
CY2012Q4	us-gaap	Proved Developed Reserves Boe1 ProvedDevelopedReservesBOE1	70051	MBoe
CY2013Q4	us-gaap	Proved Developed Reserves Boe1 ProvedDevelopedReservesBOE1	122136	MBoe
CY2014Q4	us-gaap	Proved Developed Reserves Boe1 ProvedDevelopedReservesBOE1	146343	MBoe
CY2012Q4	us-gaap	Proved Developed Reserves Volume ProvedDevelopedReservesVolume	44695	MMcf
CY2012Q4	us-gaap	Proved Developed Reserves Volume ProvedDevelopedReservesVolume	62602	MBbls
CY2013Q4	us-gaap	Proved Developed Reserves Volume ProvedDevelopedReservesVolume	92170	MMcf
CY2013Q4	us-gaap	Proved Developed Reserves Volume ProvedDevelopedReservesVolume	106774	MBbls
CY2013Q4	us-gaap	Proved Oil And Gas Property Successful Effort Method ProvedOilAndGasPropertySuccessfulEffortMethod	3713525000	USD
CY2014Q4	us-gaap	Proved Oil And Gas Property Successful Effort Method ProvedOilAndGasPropertySuccessfulEffortMethod	5156875000	USD
CY2012Q4	us-gaap	Proved Undeveloped Reserve Boe1 ProvedUndevelopedReserveBOE1	73294	MBoe
CY2013Q4	us-gaap	Proved Undeveloped Reserve Boe1 ProvedUndevelopedReserveBOE1	105784	MBoe
CY2014Q4	us-gaap	Proved Undeveloped Reserve Boe1 ProvedUndevelopedReserveBOE1	125743	MBoe
CY2012Q4	us-gaap	Proved Undeveloped Reserve Volume ProvedUndevelopedReserveVolume	65488	MBbls
CY2012Q4	us-gaap	Proved Undeveloped Reserve Volume ProvedUndevelopedReserveVolume	46835	MMcf
CY2013Q4	us-gaap	Proved Undeveloped Reserve Volume ProvedUndevelopedReserveVolume	83809	MMcf
CY2013Q4	us-gaap	Proved Undeveloped Reserve Volume ProvedUndevelopedReserveVolume	91816	MBbls
CY2014Q4	us-gaap	Proved Undeveloped Reserve Volume ProvedUndevelopedReserveVolume	108059	MBbls
CY2014Q4	us-gaap	Proved Undeveloped Reserve Volume ProvedUndevelopedReserveVolume	106104	MMcf
CY2012	us-gaap	Reclassification To Well Facilities And Equipment Based On Determination Of Proved Reserves ReclassificationToWellFacilitiesAndEquipmentBasedOnDeterminationOfProvedReserves	140091000	USD
CY2013	us-gaap	Reclassification To Well Facilities And Equipment Based On Determination Of Proved Reserves ReclassificationToWellFacilitiesAndEquipmentBasedOnDeterminationOfProvedReserves	264023000	USD
CY2014	us-gaap	Reclassification To Well Facilities And Equipment Based On Determination Of Proved Reserves ReclassificationToWellFacilitiesAndEquipmentBasedOnDeterminationOfProvedReserves	425037000	USD
CY2012	us-gaap	Revisions Of Previous Quantity Estimates RevisionsOfPreviousQuantityEstimates	-47957000	USD
CY2012	us-gaap	Repayments Of Long Term Lines Of Credit RepaymentsOfLongTermLinesOfCredit	0	USD
CY2013	us-gaap	Repayments Of Long Term Lines Of Credit RepaymentsOfLongTermLinesOfCredit	264430000	USD
CY2011Q4	us-gaap	Stockholders Equity StockholdersEquity	634238000	USD
CY2013	us-gaap	Revisions Of Previous Quantity Estimates RevisionsOfPreviousQuantityEstimates	99954000	USD
CY2014	us-gaap	Revisions Of Previous Quantity Estimates RevisionsOfPreviousQuantityEstimates	-604651000	USD
CY2012	us-gaap	Sales And Transfers Of Oil And Gas Produced Net Of Production Costs SalesAndTransfersOfOilAndGasProducedNetOfProductionCosts	542515000	USD
CY2014	us-gaap	Repayments Of Long Term Lines Of Credit RepaymentsOfLongTermLinesOfCredit	455570000	USD
CY2012	us-gaap	Results Of Operations Depreciation Depletion And Amortization And Valuation Provisions ResultsOfOperationsDepreciationDepletionAndAmortizationAndValuationProvisions	202398000	USD
CY2013	us-gaap	Sales And Transfers Of Oil And Gas Produced Net Of Production Costs SalesAndTransfersOfOilAndGasProducedNetOfProductionCosts	857540000	USD
CY2012	us-gaap	Results Of Operations Dry Hole Costs ResultsOfOperationsDryHoleCosts	505000	USD
CY2013	us-gaap	Results Of Operations Dry Hole Costs ResultsOfOperationsDryHoleCosts	0	USD
CY2014	us-gaap	Results Of Operations Dry Hole Costs ResultsOfOperationsDryHoleCosts	0	USD
CY2012	us-gaap	Results Of Operations Exploration Expense ResultsOfOperationsExplorationExpense	3250000	USD
CY2014	us-gaap	Sales And Transfers Of Oil And Gas Produced Net Of Production Costs SalesAndTransfersOfOilAndGasProducedNetOfProductionCosts	979938000	USD
CY2012	us-gaap	Share Based Compensation ShareBasedCompensation	10333000	USD
CY2013	us-gaap	Share Based Compensation ShareBasedCompensation	11982000	USD
CY2012Q4	us-gaap	Stockholders Equity StockholdersEquity	795005000	USD
CY2014	us-gaap	Revenue Oil And Gas Services RevenueOilAndGasServices	86224000	USD
CY2013	us-gaap	Results Of Operations Exploration Expense ResultsOfOperationsExplorationExpense	2260000	USD
CY2014	us-gaap	Results Of Operations Exploration Expense ResultsOfOperationsExplorationExpense	3064000	USD
CY2012	us-gaap	Results Of Operations Impairment Of Oil And Gas Properties ResultsOfOperationsImpairmentOfOilAndGasProperties	3581000	USD
CY2013	us-gaap	Results Of Operations Impairment Of Oil And Gas Properties ResultsOfOperationsImpairmentOfOilAndGasProperties	1168000	USD
CY2014	us-gaap	Results Of Operations Impairment Of Oil And Gas Properties ResultsOfOperationsImpairmentOfOilAndGasProperties	47238000	USD
CY2012	us-gaap	Results Of Operations Income Tax Expense ResultsOfOperationsIncomeTaxExpense	116941000	USD
CY2013	us-gaap	Results Of Operations Income Tax Expense ResultsOfOperationsIncomeTaxExpense	196312000	USD
CY2014	us-gaap	Results Of Operations Income Tax Expense ResultsOfOperationsIncomeTaxExpense	197701000	USD
CY2012	us-gaap	Results Of Operations Oil And Gas Producing Activities Net Income Excluding Corporate Overhead And Interest Costs ResultsOfOperationsOilAndGasProducingActivitiesNetIncomeExcludingCorporateOverheadAndInterestCosts	217175000	USD
CY2013	us-gaap	Results Of Operations Oil And Gas Producing Activities Net Income Excluding Corporate Overhead And Interest Costs ResultsOfOperationsOilAndGasProducingActivitiesNetIncomeExcludingCorporateOverheadAndInterestCosts	364578000	USD
CY2014	us-gaap	Results Of Operations Oil And Gas Producing Activities Net Income Excluding Corporate Overhead And Interest Costs ResultsOfOperationsOilAndGasProducingActivitiesNetIncomeExcludingCorporateOverheadAndInterestCosts	329502000	USD
CY2012	us-gaap	Results Of Operations Production Or Lifting Costs ResultsOfOperationsProductionOrLiftingCosts	127146000	USD
CY2013	us-gaap	Results Of Operations Production Or Lifting Costs ResultsOfOperationsProductionOrLiftingCosts	221095000	USD
CY2014	us-gaap	Results Of Operations Production Or Lifting Costs ResultsOfOperationsProductionOrLiftingCosts	326381000	USD
CY2012	us-gaap	Results Of Operations Revenue From Oil And Gas Producing Activities ResultsOfOperationsRevenueFromOilAndGasProducingActivities	670491000	USD
CY2013	us-gaap	Results Of Operations Revenue From Oil And Gas Producing Activities ResultsOfOperationsRevenueFromOilAndGasProducingActivities	1084412000	USD
CY2014	us-gaap	Results Of Operations Revenue From Oil And Gas Producing Activities ResultsOfOperationsRevenueFromOilAndGasProducingActivities	1304004000	USD
CY2013Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	367892000	USD
CY2014Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	874769000	USD
CY2012	us-gaap	Revenue Oil And Gas Services RevenueOilAndGasServices	16177000	USD
CY2013	us-gaap	Revenue Oil And Gas Services RevenueOilAndGasServices	57587000	USD
CY2014	us-gaap	Share Based Compensation ShareBasedCompensation	21302000	USD
CY2014	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Award Vesting Period1 ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1	P3Y
CY2014Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Authorized ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized	7200000	shares
CY2013Q4	us-gaap	Shares Issued Price Per Share SharesIssuedPricePerShare	44.94
CY2012	us-gaap	Standardized Measure Of Discounted Future Net Cash Flow Of Proved Oil And Gas Reserves Other StandardizedMeasureOfDiscountedFutureNetCashFlowOfProvedOilAndGasReservesOther	-134880000	USD
CY2013	us-gaap	Standardized Measure Of Discounted Future Net Cash Flow Of Proved Oil And Gas Reserves Other StandardizedMeasureOfDiscountedFutureNetCashFlowOfProvedOilAndGasReservesOther	-1951000	USD
CY2014	us-gaap	Standardized Measure Of Discounted Future Net Cash Flow Of Proved Oil And Gas Reserves Other StandardizedMeasureOfDiscountedFutureNetCashFlowOfProvedOilAndGasReservesOther	-107585000	USD
CY2011Q4	us-gaap	Standardized Measure Of Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves StandardizedMeasureOfDiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReserves	1319471000	USD
CY2012Q4	us-gaap	Standardized Measure Of Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves StandardizedMeasureOfDiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReserves	2259897000	USD
CY2013Q4	us-gaap	Standardized Measure Of Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves StandardizedMeasureOfDiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReserves	3727559000	USD
CY2014Q4	us-gaap	Standardized Measure Of Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves StandardizedMeasureOfDiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReserves	3981661000	USD
CY2013	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	314580000	USD
CY2012	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	10573000	USD
CY2013	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	12571000	USD
CY2014	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	22360000	USD
CY2013Q4	us-gaap	Stockholders Equity StockholdersEquity	1348549000	USD
CY2014Q4	us-gaap	Stockholders Equity StockholdersEquity	1872301000	USD
CY2013Q4	us-gaap	Unproved Oil And Gas Property Successful Effort Method UnprovedOilAndGasPropertySuccessfulEffortMethod	815433000	USD
CY2014Q4	us-gaap	Unproved Oil And Gas Property Successful Effort Method UnprovedOilAndGasPropertySuccessfulEffortMethod	809265000	USD
CY2014Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	0	USD
CY2012	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	333000	shares
CY2013	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	544000	shares
CY2014	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	688000	shares
CY2012	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	92513000	shares
CY2013	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	93411000	shares
CY2014	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	100365000	shares
CY2012	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	92180000	shares
CY2013	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	92867000	shares
CY2014	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	99677000	shares
CY2012	us-gaap	Well Service Expense WellServiceExpense	11774000	USD
CY2013	us-gaap	Well Service Expense WellServiceExpense	30713000	USD
CY2014	us-gaap	Well Service Expense WellServiceExpense	50252000	USD
CY2014	us-gaap	Use Of Estimates UseOfEstimates	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;padding-top:18px;text-indent:16px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-style:italic;font-weight:bold;">Use of Estimates</font></div><div style="line-height:120%;padding-top:6px;text-indent:65px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Preparation of the Company’s consolidated financial statements in accordance with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. The most significant estimates pertain to proved oil and natural gas reserves and related cash flow estimates used in impairment tests of long-lived assets, estimates of future development, dismantlement and abandonment costs, estimates relating to certain oil and natural gas revenues and expenses and estimates of expenses related to legal, environmental and other contingencies. Certain of these estimates require assumptions regarding future commodity prices, future costs and expenses and future production rates. Actual results could differ from those estimates.</font></div><div style="line-height:120%;padding-top:12px;text-indent:65px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">As an oil and natural gas producer, the Company’s revenue, profitability and future growth are substantially dependent upon the prevailing and future prices for oil and natural gas, which are dependent upon numerous factors beyond its control such as economic, political and regulatory developments and competition from other energy sources. The energy markets have historically been very volatile and there can be no assurance that oil and natural gas prices will not be subject to wide fluctuations in the future. As of February 17, 2015, spot crude oil and natural gas prices have decreased approximately </font><font style="font-family:inherit;font-size:10pt;">50%</font><font style="font-family:inherit;font-size:10pt;"> and </font><font style="font-family:inherit;font-size:10pt;">40%</font><font style="font-family:inherit;font-size:10pt;">, respectively, since June 2014. An extended period of low prices for oil could have a material adverse effect on the Company’s financial position, results of operations, cash flows and quantities of oil and natural gas reserves that may be economically produced.</font></div><div style="line-height:120%;padding-top:12px;text-indent:65px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Estimates of oil and natural gas reserves and their values, future production rates and future costs and expenses are inherently uncertain for numerous reasons, including many factors beyond the Company’s control. Reservoir engineering is a subjective process of estimating underground accumulations of oil and natural gas that cannot be measured in an exact manner. The accuracy of any reserve estimate is a function of the quality of data available and of engineering and geological interpretation and judgment. In addition, estimates of reserves may be revised based on actual production, results of subsequent exploration and development activities, prevailing commodity prices, operating costs and other factors. These revisions may be material and could materially affect future depreciation, depletion and amortization (“DD&A”) expense, dismantlement and abandonment costs, and impairment expense.</font></div></div>

Files In Submission

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$CHRD
Chord Energy Corp Stock $chrd

2014 Q4 Form 10-K Financial Statement

#000148615915000009 Filed on February 26, 2015

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$CHRD Chord Energy Corp Stock $chrd

2014 Q4 Form 10-K Financial Statement

#000148615915000009 Filed on February 26, 2015

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$CHRD
Chord Energy Corp Stock $chrd