$NOG
NORTHERN OIL & GAS, INC. Stock $nog

$nog Overview Financials Valuation SEC Filings Company Website

2016 Q4 Form 10-K Financial Statement

#000110448518000023 Filed on February 23, 2018

Income Statement

Concept	2016 Q4	2016 Q3	2016 Q2
Revenue	$35.94M	$45.11M	$32.01M
YoY Change	-36.84%	-55.41%	-21.66%
Cost Of Revenue	$16.20M	$15.00M	$15.30M
YoY Change	1.25%	-14.77%	-25.0%
Gross Profit	$19.70M	$30.10M	$16.70M
YoY Change	-51.83%	-63.95%	-18.14%
Gross Profit Margin	54.81%	66.73%	52.16%
Selling, General & Admin	$3.700M	$2.100M	$4.600M
YoY Change	-36.21%	-54.35%	6.98%
% of Gross Profit	18.78%	6.98%	27.54%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$13.50M	$13.70M	$16.20M
YoY Change	-44.21%	-56.65%	-55.98%
% of Gross Profit	68.53%	45.51%	97.01%
Operating Expenses	$33.46M	$74.58M	$124.9M
YoY Change	-84.3%	-81.73%	-63.62%
Operating Profit	$2.486M	-$29.47M	-$92.93M
YoY Change	-101.59%	-90.4%	-69.28%
Interest Expense	-$16.20M	$16.15M	$16.05M
YoY Change	0.62%	-0.05%	11.53%
% of Operating Profit	-651.69%
Other Income/Expense, Net	-$16.22M	-$16.15M	-$16.05M
YoY Change	0.65%	-0.05%	11.53%
Pretax Income	-$13.70M	-$45.62M	-$109.0M
YoY Change	-92.05%	-85.89%	-65.61%
Income Tax	-$1.402M	$0.00	$0.00
% Of Pretax Income
Net Earnings	-$12.33M	-$45.62M	-$109.0M
YoY Change	-92.84%	-85.89%	-56.42%
Net Earnings / Revenue	-34.3%	-101.13%	-340.41%
Basic Earnings Per Share	-$0.20	-$0.74	-$1.78
Diluted Earnings Per Share	-$0.20	-$0.74	-$1.78
COMMON SHARES
Basic Shares Outstanding	63.03M shares	61.24M shares	61.18M shares
Diluted Shares Outstanding		61.24M shares	61.18M shares

Balance Sheet

Concept	2016 Q4	2016 Q3	2016 Q2
SHORT-TERM ASSETS
Cash & Short-Term Investments	$6.500M	$3.300M	$3.700M
YoY Change	91.18%	-52.86%	-47.89%
Cash & Equivalents	$6.486M	$3.319M	$3.667M
Short-Term Investments
Other Short-Term Assets	$3.200M	$10.10M	$15.40M
YoY Change	-95.24%	-88.89%	-82.11%
Inventory
Prepaid Expenses
Receivables	$35.84M	$32.86M	$40.56M
Other Receivables	$1.400M	$0.00	$0.00
Total Short-Term Assets	$46.89M	$46.32M	$59.59M
YoY Change	-61.57%	-75.52%	-66.06%
LONG-TERM ASSETS
Property, Plant & Equipment	$376.2M	$355.4M	$396.9M
YoY Change	-36.16%	-53.07%	-64.43%
Goodwill
YoY Change
Intangibles
YoY Change
Long-Term Investments
YoY Change
Other Assets	$8.430M	$8.666M	$8.901M
YoY Change	-16.37%	-84.22%	-81.22%
Total Long-Term Assets	$384.6M	$364.1M	$405.8M
YoY Change	-35.83%	-55.17%	-65.11%
TOTAL ASSETS
Total Short-Term Assets	$46.89M	$46.32M	$59.59M
Total Long-Term Assets	$384.6M	$364.1M	$405.8M
Total Assets	$431.5M	$410.4M	$465.4M
YoY Change	-40.18%	-59.01%	-65.24%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$56.15M	$47.76M	$59.32M
YoY Change	-14.04%	-51.71%	-48.78%
Accrued Expenses	$6.095M	$5.201M	$4.723M
YoY Change	-22.79%	-79.68%	-55.44%
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due	$0.00
YoY Change
Total Short-Term Liabilities	$77.44M	$72.58M	$70.35M
YoY Change	-0.86%	-53.59%	-54.35%
LONG-TERM LIABILITIES
Long-Term Debt	$832.6M	$807.8M	$819.0M
YoY Change	-0.32%	-6.9%	-7.51%
Other Long-Term Liabilities	$156.6K	$6.100M	$5.900M
YoY Change		10.91%	11.32%
Total Long-Term Liabilities	$832.8M	$813.9M	$824.9M
YoY Change		-6.79%	-7.4%
TOTAL LIABILITIES
Total Short-Term Liabilities	$77.44M	$72.58M	$70.35M
Total Long-Term Liabilities	$832.8M	$813.9M	$824.9M
Total Liabilities	$919.0M	$886.4M	$895.2M
YoY Change	-0.01%	-13.91%	-14.34%
SHAREHOLDERS EQUITY
Retained Earnings	-$931.4M	-$919.0M	-$873.4M
YoY Change	46.01%
Common Stock	$444.0M	$443.0M	$443.6M
YoY Change	0.83%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	-$487.4M	-$476.1M	-$429.8M
YoY Change
Total Liabilities & Shareholders Equity	$431.5M	$410.4M	$465.4M
YoY Change	-40.18%	-59.01%	-65.24%

Cashflow Statement

Concept	2016 Q4	2016 Q3	2016 Q2
OPERATING ACTIVITIES
Net Income	-$12.33M	-$45.62M	-$109.0M
YoY Change	-92.84%	-85.89%	-56.42%
Depreciation, Depletion And Amortization	$13.50M	$13.70M	$16.20M
YoY Change	-44.21%	-56.65%	-55.98%
Cash From Operating Activities	$4.200M	$39.20M	$3.300M
YoY Change	-94.18%	-37.88%	-92.63%
INVESTING ACTIVITIES
Capital Expenditures	-$26.20M	-$28.60M	-$18.30M
YoY Change	-52.96%	-36.59%	-76.45%
Acquisitions
YoY Change
Other Investing Activities	$1.200M	$1.000M	$0.00
YoY Change
Cash From Investing Activities	-$25.00M	-$27.60M	-$18.30M
YoY Change	-55.12%	-38.67%	-76.48%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	24.00M	-12.00M	14.40M
YoY Change	-219.4%	-33.7%	-58.02%
NET CHANGE
Cash From Operating Activities	4.200M	39.20M	3.300M
Cash From Investing Activities	-25.00M	-27.60M	-18.30M
Cash From Financing Activities	24.00M	-12.00M	14.40M
Net Change In Cash	3.200M	-400.0K	-600.0K
YoY Change	-188.89%	-5368709120000100.0%	-146.15%
FREE CASH FLOW
Cash From Operating Activities	$4.200M	$39.20M	$3.300M
Capital Expenditures	-$26.20M	-$28.60M	-$18.30M
Free Cash Flow	$30.40M	$67.80M	$21.60M
YoY Change	-76.23%	-37.34%	-82.37%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2017	dei	Amendment Flag AmendmentFlag	false
CY2017	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2017	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2017	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2017
CY2017	dei	Document Period End Date DocumentPeriodEndDate	2017-12-31
CY2017	dei	Document Type DocumentType	10-K
CY2017	dei	Entity Central Index Key EntityCentralIndexKey	0001104485
CY2018Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	65944133	shares
CY2017	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2017	dei	Entity Filer Category EntityFilerCategory	Accelerated Filer
CY2017Q2	dei	Entity Public Float EntityPublicFloat	68000000	USD
CY2017Q4	invest	Derivative Nonmonetary Notional Amount DerivativeNonmonetaryNotionalAmount	6200000	bbl
CY2016Q4	nog	Advances To Operators AdvancesToOperators	1577204	USD
CY2017Q4	nog	Advances To Operators AdvancesToOperators	604977	USD
CY2017	nog	Anticipated Timing Of Inclusion Of Cost In Amortization Calculation AnticipatedTimingOfInclusionOfCostInAmortizationCalculation	P5Y
CY2017	dei	Entity Registrant Name EntityRegistrantName	NORTHERN OIL & GAS, INC.
CY2015	nog	Capitalized Costs Relatedto Expired Leases Subjectto Depletion CapitalizedCostsRelatedtoExpiredLeasesSubjecttoDepletion	19000000	USD
CY2016	nog	Asset Retirement Obligation Liabilities Removed Dueto Divestitures AssetRetirementObligationLiabilitiesRemovedDuetoDivestitures	21426	USD
CY2017Q4	nog	Capitalized Costs Oil And Gas Producing Activities Development Costs CapitalizedCostsOilAndGasProducingActivitiesDevelopmentCosts	0	USD
CY2014Q4	nog	Capitalized Costs Oil And Gas Producing Activities Property Acquisition CapitalizedCostsOilAndGasProducingActivitiesPropertyAcquisition	121321	USD
CY2017	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2017	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	No
CY2015Q4	nog	Capitalized Costs Oil And Gas Producing Activities Property Acquisition CapitalizedCostsOilAndGasProducingActivitiesPropertyAcquisition	502794	USD
CY2016Q4	nog	Capitalized Costs Oil And Gas Producing Activities Property Acquisition CapitalizedCostsOilAndGasProducingActivitiesPropertyAcquisition	509877	USD
CY2017Q4	nog	Capitalized Costs Oil And Gas Producing Activities Property Acquisition CapitalizedCostsOilAndGasProducingActivitiesPropertyAcquisition	565352	USD
CY2017	nog	Asset Retirement Obligation Liabilities Removed Dueto Divestitures AssetRetirementObligationLiabilitiesRemovedDuetoDivestitures	0	USD
CY2015Q4	nog	Average Acquisition Cost Per Net Acre AverageAcquisitionCostPerNetAcre	1314
CY2016Q4	nog	Average Acquisition Cost Per Net Acre AverageAcquisitionCostPerNetAcre	1515
CY2017Q4	nog	Average Acquisition Cost Per Net Acre AverageAcquisitionCostPerNetAcre	2352
CY2015	nog	Capitalized Asset Retirement Obligations CapitalizedAssetRetirementObligations	421394	USD
CY2016	nog	Capitalized Asset Retirement Obligations CapitalizedAssetRetirementObligations	1353307	USD
CY2017	nog	Capitalized Asset Retirement Obligations CapitalizedAssetRetirementObligations	1187791	USD
CY2015	nog	Capitalized Certain Payroll And Other Internal Costs CapitalizedCertainPayrollAndOtherInternalCosts	2717913	USD
CY2016	nog	Capitalized Certain Payroll And Other Internal Costs CapitalizedCertainPayrollAndOtherInternalCosts	1890480	USD
CY2017	nog	Capitalized Certain Payroll And Other Internal Costs CapitalizedCertainPayrollAndOtherInternalCosts	930289	USD
CY2014Q4	nog	Capitalized Costs Oil And Gas Producing Activities Development Costs CapitalizedCostsOilAndGasProducingActivitiesDevelopmentCosts	0	USD
CY2015Q4	nog	Capitalized Costs Oil And Gas Producing Activities Development Costs CapitalizedCostsOilAndGasProducingActivitiesDevelopmentCosts	0	USD
CY2016Q4	nog	Capitalized Costs Oil And Gas Producing Activities Development Costs CapitalizedCostsOilAndGasProducingActivitiesDevelopmentCosts	0	USD
CY2016	nog	Capitalized Costs Relatedto Expired Leases Subjectto Depletion CapitalizedCostsRelatedtoExpiredLeasesSubjecttoDepletion	13400000	USD
CY2017	nog	Capitalized Costs Relatedto Expired Leases Subjectto Depletion CapitalizedCostsRelatedtoExpiredLeasesSubjecttoDepletion	18700000	USD
CY2015	nog	Cash Received Paid On Derivatives CashReceivedPaidOnDerivatives	161098510	USD
CY2016	nog	Cash Received Paid On Derivatives CashReceivedPaidOnDerivatives	61528201	USD
CY2017	nog	Cash Received Paid On Derivatives CashReceivedPaidOnDerivatives	3776788	USD
CY2017	nog	Crude Oil And Natural Gas Properties Discount Rate CrudeOilAndNaturalGasPropertiesDiscountRate	0.10
CY2016Q4	nog	Deferred Tax Asset Liabilities Net Before Valuation Allowance DeferredTaxAssetLiabilitiesNetBeforeValuationAllowance	341265900	USD
CY2017Q4	nog	Deferred Tax Asset Liabilities Net Before Valuation Allowance DeferredTaxAssetLiabilitiesNetBeforeValuationAllowance	227747900	USD
CY2016Q4	nog	Deferred Tax Assets Liabilities Derivatives DeferredTaxAssetsLiabilitiesDerivatives	4341000	USD
CY2017Q4	nog	Deferred Tax Assets Liabilities Derivatives DeferredTaxAssetsLiabilitiesDerivatives	7393000	USD
CY2016Q4	nog	Deferred Tax Assets Liabilities Other DeferredTaxAssetsLiabilitiesOther	49000	USD
CY2017Q4	nog	Deferred Tax Assets Liabilities Other DeferredTaxAssetsLiabilitiesOther	-140000	USD
CY2016Q4	nog	Deferred Tax Assets Liabilities Property Plant And Equipment DeferredTaxAssetsLiabilitiesPropertyPlantAndEquipment	107642000	USD
CY2017Q4	nog	Deferred Tax Assets Liabilities Property Plant And Equipment DeferredTaxAssetsLiabilitiesPropertyPlantAndEquipment	42329000	USD
CY2015	nog	Depletion Depreciation Amortization And Accretion DepletionDepreciationAmortizationAndAccretion	137769812	USD
CY2016	nog	Depletion Depreciation Amortization And Accretion DepletionDepreciationAmortizationAndAccretion	61244158	USD
CY2017	nog	Depletion Depreciation Amortization And Accretion DepletionDepreciationAmortizationAndAccretion	59500155	USD
CY2015	nog	Dilutive Securities Effect On Basic Earnings Per Share DilutiveSecuritiesEffectOnBasicEarningsPerShare	0.00
CY2016	nog	Dilutive Securities Effect On Basic Earnings Per Share DilutiveSecuritiesEffectOnBasicEarningsPerShare	0.00
CY2017	nog	Dilutive Securities Effect On Basic Earnings Per Share DilutiveSecuritiesEffectOnBasicEarningsPerShare	0.00
CY2015	nog	Gas And Oil Acreage Net Acres Acquired GasAndOilAcreageNetAcresAcquired	4355	acre
CY2016	nog	Gas And Oil Acreage Net Acres Acquired GasAndOilAcreageNetAcresAcquired	3399	acre
CY2017	nog	Gas And Oil Acreage Net Acres Acquired GasAndOilAcreageNetAcresAcquired	1934	acre
CY2017Q4	nog	Gas And Oil Acreage Net Mineral Rights GasAndOilAcreageNetMineralRights	143253	acre
CY2015	nog	Impairment Costs Related To Expired Leases Subject To Depletion ImpairmentCostsRelatedToExpiredLeasesSubjectToDepletion	37600000	USD
CY2016	nog	Impairment Costs Related To Expired Leases Subject To Depletion ImpairmentCostsRelatedToExpiredLeasesSubjectToDepletion	7000000	USD
CY2015	nog	Oil And Natural Gas Properties Included In Accounts Payable OilAndNaturalGasPropertiesIncludedInAccountsPayable	59520415	USD
CY2016	nog	Oil And Natural Gas Properties Included In Accounts Payable OilAndNaturalGasPropertiesIncludedInAccountsPayable	50713195	USD
CY2017	nog	Impairment Costs Related To Expired Leases Subject To Depletion ImpairmentCostsRelatedToExpiredLeasesSubjectToDepletion	600000	USD
CY2015	nog	Income Tax Expense Benefit Valuation Allowance IncomeTaxExpenseBenefitValuationAllowance	-232260000	USD
CY2016	nog	Income Tax Expense Benefit Valuation Allowance IncomeTaxExpenseBenefitValuationAllowance	-109005900	USD
CY2017	nog	Income Tax Expense Benefit Valuation Allowance IncomeTaxExpenseBenefitValuationAllowance	114303000	USD
CY2015	nog	Maximum Percentage Of Eligible Compensation Matched MaximumPercentageOfEligibleCompensationMatched	0.08
CY2016	nog	Maximum Percentage Of Eligible Compensation Matched MaximumPercentageOfEligibleCompensationMatched	0.08
CY2017	nog	Maximum Percentage Of Eligible Compensation Matched MaximumPercentageOfEligibleCompensationMatched	0.08
CY2015	nog	Net Cash Receipts Payment For Crude Oil Contracts NetCashReceiptsPaymentForCrudeOilContracts	200000	USD
CY2017	nog	Net Cash Receipts Payment For Crude Oil Contracts NetCashReceiptsPaymentForCrudeOilContracts	700000	USD
CY2017Q4	nog	Number Of Classes Of Shares NumberOfClassesOfShares	2
CY2015	nog	Proceeds From Sale Of Oil And Gas Property And Equipment Due To Alteration ProceedsFromSaleOfOilAndGasPropertyAndEquipmentDueToAlteration	0	USD
CY2016	nog	Proceeds From Sale Of Oil And Gas Property And Equipment Due To Alteration ProceedsFromSaleOfOilAndGasPropertyAndEquipmentDueToAlteration	0	USD
CY2017	nog	Proceeds From Sale Of Oil And Gas Property And Equipment Due To Alteration ProceedsFromSaleOfOilAndGasPropertyAndEquipmentDueToAlteration	0	USD
CY2015	nog	Stock Issued During Period Shares Legal Settlement StockIssuedDuringPeriodSharesLegalSettlement	0	shares
CY2016	nog	Stock Issued During Period Shares Legal Settlement StockIssuedDuringPeriodSharesLegalSettlement	0	shares
CY2017	nog	Stock Issued During Period Shares Legal Settlement StockIssuedDuringPeriodSharesLegalSettlement	3000000	shares
CY2017	nog	Stock Issued During Period Shares Legal Settlement StockIssuedDuringPeriodSharesLegalSettlement	3000000	shares
CY2015	nog	Stock Issued During Period Value Restricted Stock Award Surrenders Tax Obligations StockIssuedDuringPeriodValueRestrictedStockAwardSurrendersTaxObligations	339578	USD
CY2016	nog	Stock Issued During Period Value Restricted Stock Award Surrenders Tax Obligations StockIssuedDuringPeriodValueRestrictedStockAwardSurrendersTaxObligations	1403260	USD
CY2017	nog	Oil And Natural Gas Properties Included In Accounts Payable OilAndNaturalGasPropertiesIncludedInAccountsPayable	85002458	USD
CY2015	nog	Percentage Entity Matches Of Eligible Employees Contributions PercentageEntityMatchesOfEligibleEmployeesContributions	1
CY2016	nog	Percentage Entity Matches Of Eligible Employees Contributions PercentageEntityMatchesOfEligibleEmployeesContributions	1
CY2017	nog	Percentage Entity Matches Of Eligible Employees Contributions PercentageEntityMatchesOfEligibleEmployeesContributions	1
CY2017	nog	Percentage Of Mineral Rights Developed PercentageOfMineralRightsDeveloped	0.87
CY2017	nog	Percentage Of Proved Reserves Sold To Be Considered Significant Alteration PercentageOfProvedReservesSoldToBeConsideredSignificantAlteration	0.25
CY2017	nog	Period For Advance Payments To Be Applied Against Joint Interest Billings PeriodForAdvancePaymentsToBeAppliedAgainstJointInterestBillings	P90D
CY2017	nog	Stock Issued During Period Value Restricted Stock Award Surrenders Tax Obligations StockIssuedDuringPeriodValueRestrictedStockAwardSurrendersTaxObligations	668389	USD
CY2017Q4	nog	Stock Shares Authorized StockSharesAuthorized	147500000	shares
CY2017	nog	Tax Cuts And Jobs Act Of2017 Change In Tax Rate Income Tax Expense Benefit TaxCutsAndJobsActOf2017ChangeInTaxRateIncomeTaxExpenseBenefit	-800000	USD
CY2017	nog	Tax Cuts And Jobs Act Of2017 Incomplete Accounting Change In Tax Rate Deferred Tax Asset Provisional Income Tax Expense TaxCutsAndJobsActOf2017IncompleteAccountingChangeInTaxRateDeferredTaxAssetProvisionalIncomeTaxExpense	124500000	USD
CY2017	nog	Tax Cuts And Jobs Act Of2017 Incomplete Accounting Change In Tax Rate Deferred Tax Asset Valuation Allowance Provisional Income Tax Benefit TaxCutsAndJobsActOf2017IncompleteAccountingChangeInTaxRateDeferredTaxAssetValuationAllowanceProvisionalIncomeTaxBenefit	125300000	USD
CY2015	nog	Total Capitalized Costs Oil And Gas Producing Activities TotalCapitalizedCostsOilAndGasProducingActivities	4224085	USD
CY2016	nog	Total Capitalized Costs Oil And Gas Producing Activities TotalCapitalizedCostsOilAndGasProducingActivities	2246676	USD
CY2017	nog	Total Capitalized Costs Oil And Gas Producing Activities TotalCapitalizedCostsOilAndGasProducingActivities	1078064	USD
CY2016Q4	nog	Unproven Leasehold Interests UnprovenLeaseholdInterests	26432	acre
CY2017Q4	nog	Unproven Leasehold Interests UnprovenLeaseholdInterests	14377	acre
CY2016Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	56146847	USD
CY2017Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	93152297	USD
CY2016Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	35840042	USD
CY2017Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	46851682	USD
CY2016Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	6094938	USD
CY2017Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	6339425	USD
CY2016Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	2055987766	USD
CY2017Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	2114951189	USD
CY2016Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	443895032	USD
CY2017Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	449666390	USD
CY2016Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	4900000	USD
CY2017Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	5600000	USD
CY2016	us-gaap	Allowance For Doubtful Accounts Receivable Write Offs AllowanceForDoubtfulAccountsReceivableWriteOffs	400000	USD
CY2017	us-gaap	Allowance For Doubtful Accounts Receivable Write Offs AllowanceForDoubtfulAccountsReceivableWriteOffs	0	USD
CY2015	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	-248268	USD
CY2016	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	501324	USD
CY2017	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	495892	USD
CY2015	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	3696532	USD
CY2015	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	3700000	USD
CY2016	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	3800000	USD
CY2016	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	3822967	USD
CY2017	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	4100000	USD
CY2017	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	4122226	USD
CY2015	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	322393	shares
CY2016	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	829313	shares
CY2016Q4	us-gaap	Assets Assets	431532961	USD
CY2017	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	1109511	shares
CY2015	us-gaap	Asset Impairment Charges AssetImpairmentCharges	0	USD
CY2016	us-gaap	Asset Impairment Charges AssetImpairmentCharges	0	USD
CY2017	us-gaap	Asset Impairment Charges AssetImpairmentCharges	0	USD
CY2015Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	5816356	USD
CY2016Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	7508300	USD
CY2017Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	9128128	USD
CY2016	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	405991	USD
CY2017	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	536732	USD
CY2016Q4	us-gaap	Asset Retirement Obligation Current AssetRetirementObligationCurrent	517423	USD
CY2017Q4	us-gaap	Asset Retirement Obligation Current AssetRetirementObligationCurrent	565521	USD
CY2016	us-gaap	Asset Retirement Obligation Liabilities Incurred AssetRetirementObligationLiabilitiesIncurred	585729	USD
CY2017	us-gaap	Asset Retirement Obligation Liabilities Incurred AssetRetirementObligationLiabilitiesIncurred	578441	USD
CY2016	us-gaap	Asset Retirement Obligation Liabilities Settled AssetRetirementObligationLiabilitiesSettled	67353	USD
CY2017	us-gaap	Asset Retirement Obligation Liabilities Settled AssetRetirementObligationLiabilitiesSettled	104696	USD
CY2016	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	800000	USD
CY2016	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	789003	USD
CY2017	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	609351	USD
CY2017	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	600000	USD
CY2016Q4	us-gaap	Asset Retirement Obligations Noncurrent AssetRetirementObligationsNoncurrent	6990877	USD
CY2017Q4	us-gaap	Asset Retirement Obligations Noncurrent AssetRetirementObligationsNoncurrent	8562607	USD
CY2017Q4	us-gaap	Assets Assets	632253679	USD
CY2016Q4	us-gaap	Assets Current AssetsCurrent	46894169	USD
CY2017Q4	us-gaap	Assets Current AssetsCurrent	152758154	USD
CY2016	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	50700000	USD
CY2017	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	85000000	USD
CY2014	us-gaap	Capitalized Costs Of Unproved Properties Excluded From Amortization CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortization	121321	USD
CY2015	us-gaap	Capitalized Costs Of Unproved Properties Excluded From Amortization CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortization	502794	USD
CY2016	us-gaap	Capitalized Costs Of Unproved Properties Excluded From Amortization CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortization	509877	USD
CY2017	us-gaap	Capitalized Costs Of Unproved Properties Excluded From Amortization CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortization	565352	USD
CY2014Q4	us-gaap	Capitalized Costs Oil And Gas Producing Activities Net CapitalizedCostsOilAndGasProducingActivitiesNet	121321	USD
CY2015Q4	us-gaap	Capitalized Costs Oil And Gas Producing Activities Net CapitalizedCostsOilAndGasProducingActivitiesNet	502794	USD
CY2016Q4	us-gaap	Capitalized Costs Oil And Gas Producing Activities Net CapitalizedCostsOilAndGasProducingActivitiesNet	509877	USD
CY2017Q4	us-gaap	Capitalized Costs Oil And Gas Producing Activities Net CapitalizedCostsOilAndGasProducingActivitiesNet	565352	USD
CY2016Q4	us-gaap	Capitalized Costs Proved Properties CapitalizedCostsProvedProperties	2428595048	USD
CY2017Q4	us-gaap	Capitalized Costs Proved Properties CapitalizedCostsProvedProperties	2585490133	USD
CY2016Q4	us-gaap	Capitalized Costs Unproved Properties CapitalizedCostsUnprovedProperties	2623802	USD
CY2017Q4	us-gaap	Capitalized Costs Unproved Properties CapitalizedCostsUnprovedProperties	1699344	USD
CY2014Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	9337512	USD
CY2015Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	3390389	USD
CY2016Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	6486098	USD
CY2017Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	102183191	USD
CY2015	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-5947123	USD
CY2016	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	3095709	USD
CY2017	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	95697093	USD
CY2016Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2017Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2016Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.001
CY2017Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.001
CY2016Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	142500000	shares
CY2017Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	142500000	shares
CY2016Q2	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	142500000	shares
CY2014Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	61066712	shares
CY2015Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	63120384	shares
CY2016Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	63259781	shares
CY2017Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	66791633	shares
CY2016Q4	us-gaap	Common Stock Value CommonStockValue	63260	USD
CY2017Q4	us-gaap	Common Stock Value CommonStockValue	66792	USD
CY2015	us-gaap	Costs Incurred Acquisition Of Oil And Gas Properties With Proved Reserves CostsIncurredAcquisitionOfOilAndGasPropertiesWithProvedReserves	9068139	USD
CY2016	us-gaap	Costs Incurred Acquisition Of Oil And Gas Properties With Proved Reserves CostsIncurredAcquisitionOfOilAndGasPropertiesWithProvedReserves	18531518	USD
CY2017	us-gaap	Costs Incurred Acquisition Of Oil And Gas Properties With Proved Reserves CostsIncurredAcquisitionOfOilAndGasPropertiesWithProvedReserves	15722378	USD
CY2015	us-gaap	Costs Incurred Acquisition Of Unproved Oil And Gas Properties CostsIncurredAcquisitionOfUnprovedOilAndGasProperties	3346214	USD
CY2016	us-gaap	Costs Incurred Acquisition Of Unproved Oil And Gas Properties CostsIncurredAcquisitionOfUnprovedOilAndGasProperties	2301285	USD
CY2017	us-gaap	Costs Incurred Acquisition Of Unproved Oil And Gas Properties CostsIncurredAcquisitionOfUnprovedOilAndGasProperties	716681	USD
CY2015	us-gaap	Costs Incurred Development Costs CostsIncurredDevelopmentCosts	116255535	USD
CY2016	us-gaap	Costs Incurred Development Costs CostsIncurredDevelopmentCosts	63621429	USD
CY2017	us-gaap	Costs Incurred Development Costs CostsIncurredDevelopmentCosts	139531567	USD
CY2015	us-gaap	Costs Incurred Oil And Gas Property Acquisition Exploration And Development Activities CostsIncurredOilAndGasPropertyAcquisitionExplorationAndDevelopmentActivities	128669888	USD
CY2016	us-gaap	Costs Incurred Oil And Gas Property Acquisition Exploration And Development Activities CostsIncurredOilAndGasPropertyAcquisitionExplorationAndDevelopmentActivities	84454232	USD
CY2017	us-gaap	Costs Incurred Oil And Gas Property Acquisition Exploration And Development Activities CostsIncurredOilAndGasPropertyAcquisitionExplorationAndDevelopmentActivities	155970626	USD
CY2015	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-73649	USD
CY2016	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-1402179	USD
CY2017	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-785016	USD
CY2015	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	0	USD
CY2016	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	0	USD
CY2017	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	0	USD
CY2016Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	844000000	USD
CY2017Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	1000000000	USD
CY2016Q4	us-gaap	Debt Instrument Unamortized Discount Premium Net DebtInstrumentUnamortizedDiscountPremiumNet	1693847	USD
CY2017Q4	us-gaap	Debt Instrument Unamortized Discount Premium Net DebtInstrumentUnamortizedDiscountPremiumNet	1197954	USD
CY2015	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-398002555	USD
CY2016	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-99298900	USD
CY2017	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	126501000	USD
CY2016Q4	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	9681028	USD
CY2017Q4	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	19477824	USD
CY2015	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-202350555	USD
CY2016	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	0	USD
CY2017	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-785000	USD
CY2015	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-36608000	USD
CY2016	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-9707000	USD
CY2017	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-12983000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	0	USD
CY2017Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	785000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Net Noncurrent DeferredTaxAssetsNetNoncurrent	0	USD
CY2017Q4	us-gaap	Deferred Tax Assets Net Noncurrent DeferredTaxAssetsNetNoncurrent	785000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	224679900	USD
CY2017Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	174864900	USD
CY2016Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards Alternative Minimum Tax DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTax	1400000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards Alternative Minimum Tax DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTax	800000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	1032000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	797000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Liabilities DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities	1727000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Liabilities DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities	1144000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Allowance For Doubtful Accounts DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts	1795000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Allowance For Doubtful Accounts DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts	1360000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	341300000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	341265900	USD
CY2017Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	226962900	USD
CY2017Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	227000000	USD
CY2015	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	279000	USD
CY2016	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	238000	USD
CY2017	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	178000	USD
CY2015	us-gaap	Depreciation And Amortization DepreciationAndAmortization	300000	USD
CY2016	us-gaap	Depreciation And Amortization DepreciationAndAmortization	200000	USD
CY2017	us-gaap	Depreciation And Amortization DepreciationAndAmortization	200000	USD
CY2016Q4	us-gaap	Derivative Asset Fair Value Gross Liability DerivativeAssetFairValueGrossLiability	16445	USD
CY2017Q4	us-gaap	Derivative Asset Fair Value Gross Liability DerivativeAssetFairValueGrossLiability	0	USD
CY2016Q4	us-gaap	Derivative Assets Current DerivativeAssetsCurrent	4517	USD
CY2017Q4	us-gaap	Derivative Assets Current DerivativeAssetsCurrent	0	USD
CY2016Q4	us-gaap	Derivative Fair Value Of Derivative Asset DerivativeFairValueOfDerivativeAsset	20962	USD
CY2017Q4	us-gaap	Derivative Fair Value Of Derivative Asset DerivativeFairValueOfDerivativeAsset	0	USD
CY2016Q4	us-gaap	Derivative Fair Value Of Derivative Asset Amount Not Offset Against Collateral DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral	4517	USD
CY2017Q4	us-gaap	Derivative Fair Value Of Derivative Asset Amount Not Offset Against Collateral DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral	0	USD
CY2016Q4	us-gaap	Derivative Fair Value Of Derivative Liability DerivativeFairValueOfDerivativeLiability	11756338	USD
CY2017Q4	us-gaap	Derivative Fair Value Of Derivative Liability DerivativeFairValueOfDerivativeLiability	30178820	USD
CY2016Q4	us-gaap	Derivative Fair Value Of Derivative Liability Amount Not Offset Against Collateral DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral	11739893	USD
CY2017Q4	us-gaap	Derivative Fair Value Of Derivative Liability Amount Not Offset Against Collateral DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral	30178820	USD
CY2015	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	72382907	USD
CY2016Q1	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	3463883	USD
CY2016Q2	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	-10522948	USD
CY2016Q3	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	3381564	USD
CY2016Q4	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	-11141233	USD
CY2016	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	-14818734	USD
CY2017Q1	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	16960883	USD
CY2017Q2	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	16513032	USD
CY2016Q4	us-gaap	Derivative Liabilities Noncurrent DerivativeLiabilitiesNoncurrent	1738329	USD
CY2017Q4	us-gaap	Derivative Liabilities Noncurrent DerivativeLiabilitiesNoncurrent	11496929	USD
CY2017Q3	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	-12663253	USD
CY2017Q4	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	-35477317	USD
CY2017	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	-14666655	USD
CY2016Q4	us-gaap	Derivative Liabilities Current DerivativeLiabilitiesCurrent	10001564	USD
CY2017Q4	us-gaap	Derivative Liabilities Current DerivativeLiabilitiesCurrent	18681891	USD
CY2016Q4	us-gaap	Derivative Liability Fair Value Gross Asset DerivativeLiabilityFairValueGrossAsset	16445	USD
CY2017Q4	us-gaap	Derivative Liability Fair Value Gross Asset DerivativeLiabilityFairValueGrossAsset	0	USD
CY2017Q4	us-gaap	Derivative Swap Type Average Fixed Price DerivativeSwapTypeAverageFixedPrice	52.24
CY2015	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-16.08
CY2016Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-2.08
CY2016Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-1.78
CY2016Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.74
CY2016Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.20
CY2016	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-4.80
CY2017Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.28
CY2017Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.22
CY2017Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.26
CY2017	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.15
CY2015	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-16.08
CY2016Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-2.08
CY2016Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-1.78
CY2016Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.74
CY2016Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.20
CY2016	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-4.80
CY2017Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.27
CY2017Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.22
CY2017Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.26
CY2017Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.37
CY2017	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.15
CY2015	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35
CY2016	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35
CY2017	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35
CY2015	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	1330693	USD
CY2016	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	971313	USD
CY2017	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	274653	USD
CY2015	us-gaap	Extensions Discoveries Additions And Improved Recovery Less Related Costs ExtensionsDiscoveriesAdditionsAndImprovedRecoveryLessRelatedCosts	96770078	USD
CY2016	us-gaap	Extensions Discoveries Additions And Improved Recovery Less Related Costs ExtensionsDiscoveriesAdditionsAndImprovedRecoveryLessRelatedCosts	59542911	USD
CY2017	us-gaap	Extensions Discoveries Additions And Improved Recovery Less Related Costs ExtensionsDiscoveriesAdditionsAndImprovedRecoveryLessRelatedCosts	217145871	USD
CY2015Q4	us-gaap	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Cash Inflows FutureNetCashFlowsRelatingToProvedOilAndGasReservesCashInflows	2470707712	USD
CY2016Q4	us-gaap	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Cash Inflows FutureNetCashFlowsRelatingToProvedOilAndGasReservesCashInflows	1708870912	USD
CY2017Q4	us-gaap	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Cash Inflows FutureNetCashFlowsRelatingToProvedOilAndGasReservesCashInflows	3143603968	USD
CY2015Q4	us-gaap	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Development Costs FutureNetCashFlowsRelatingToProvedOilAndGasReservesDevelopmentCosts	356401888	USD
CY2016Q4	us-gaap	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Development Costs FutureNetCashFlowsRelatingToProvedOilAndGasReservesDevelopmentCosts	220869664	USD
CY2017Q4	us-gaap	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Development Costs FutureNetCashFlowsRelatingToProvedOilAndGasReservesDevelopmentCosts	409360320	USD
CY2015Q4	us-gaap	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Income Tax Expense FutureNetCashFlowsRelatingToProvedOilAndGasReservesIncomeTaxExpense	5740623	USD
CY2016Q4	us-gaap	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Income Tax Expense FutureNetCashFlowsRelatingToProvedOilAndGasReservesIncomeTaxExpense	2477353	USD
CY2017Q4	us-gaap	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Income Tax Expense FutureNetCashFlowsRelatingToProvedOilAndGasReservesIncomeTaxExpense	27476230	USD
CY2015Q4	us-gaap	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Net Cash Flows FutureNetCashFlowsRelatingToProvedOilAndGasReservesNetCashFlows	1127309105	USD
CY2016Q4	us-gaap	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Net Cash Flows FutureNetCashFlowsRelatingToProvedOilAndGasReservesNetCashFlows	709989063	USD
CY2017Q4	us-gaap	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Net Cash Flows FutureNetCashFlowsRelatingToProvedOilAndGasReservesNetCashFlows	1441242618	USD
CY2015Q4	us-gaap	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Production Costs FutureNetCashFlowsRelatingToProvedOilAndGasReservesProductionCosts	981256096	USD
CY2016Q4	us-gaap	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Production Costs FutureNetCashFlowsRelatingToProvedOilAndGasReservesProductionCosts	775534832	USD
CY2017Q4	us-gaap	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Production Costs FutureNetCashFlowsRelatingToProvedOilAndGasReservesProductionCosts	1265524800	USD
CY2015Q4	us-gaap	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Ten Percent Annual Discount For Estimated Timing Of Cash Flows FutureNetCashFlowsRelatingToProvedOilAndGasReservesTenPercentAnnualDiscountForEstimatedTimingOfCashFlows	552510342	USD
CY2016Q4	us-gaap	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Ten Percent Annual Discount For Estimated Timing Of Cash Flows FutureNetCashFlowsRelatingToProvedOilAndGasReservesTenPercentAnnualDiscountForEstimatedTimingOfCashFlows	330963050	USD
CY2017Q4	us-gaap	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Ten Percent Annual Discount For Estimated Timing Of Cash Flows FutureNetCashFlowsRelatingToProvedOilAndGasReservesTenPercentAnnualDiscountForEstimatedTimingOfCashFlows	687256521	USD
CY2015	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	61787	USD
CY2016	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	-30356	USD
CY2017	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	0	USD
CY2015	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
CY2016	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
CY2017	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-1000000	USD
CY2017	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-992950	USD
CY2015	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	19042004	USD
CY2016	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	14757641	USD
CY2017	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	18987801	USD
CY2015	us-gaap	Impairment Of Oil And Gas Properties ImpairmentOfOilAndGasProperties	1163959246	USD
CY2015	us-gaap	Impairment Of Oil And Gas Properties ImpairmentOfOilAndGasProperties	1200000000	USD
CY2016Q1	us-gaap	Impairment Of Oil And Gas Properties ImpairmentOfOilAndGasProperties	104311122	USD
CY2016Q2	us-gaap	Impairment Of Oil And Gas Properties ImpairmentOfOilAndGasProperties	88880921	USD
CY2016Q3	us-gaap	Impairment Of Oil And Gas Properties ImpairmentOfOilAndGasProperties	43820791	USD
CY2016Q4	us-gaap	Impairment Of Oil And Gas Properties ImpairmentOfOilAndGasProperties	0	USD
CY2016	us-gaap	Impairment Of Oil And Gas Properties ImpairmentOfOilAndGasProperties	237000000	USD
CY2016	us-gaap	Impairment Of Oil And Gas Properties ImpairmentOfOilAndGasProperties	237012834	USD
CY2017	us-gaap	Impairment Of Oil And Gas Properties ImpairmentOfOilAndGasProperties	0	USD
CY2017	us-gaap	Impairment Of Oil And Gas Properties ImpairmentOfOilAndGasProperties	0	USD
CY2015	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-1177778745	USD
CY2016	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-294895887	USD
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-10763788	USD
CY2016Q4	us-gaap	Income Tax Examination Penalties And Interest Accrued IncomeTaxExaminationPenaltiesAndInterestAccrued	0	USD
CY2017Q4	us-gaap	Income Tax Examination Penalties And Interest Accrued IncomeTaxExaminationPenaltiesAndInterestAccrued	0	USD
CY2015	us-gaap	Income Tax Examination Penalties And Interest Expense IncomeTaxExaminationPenaltiesAndInterestExpense	0	USD
CY2016	us-gaap	Income Tax Examination Penalties And Interest Expense IncomeTaxExaminationPenaltiesAndInterestExpense	0	USD
CY2017	us-gaap	Income Tax Examination Penalties And Interest Expense IncomeTaxExaminationPenaltiesAndInterestExpense	0	USD
CY2015	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-202424204	USD
CY2016Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	0	USD
CY2016Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	0	USD
CY2016Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	0	USD
CY2016Q4	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-1402179	USD
CY2016	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-1402179	USD
CY2017Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	0	USD
CY2017Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	0	USD
CY2017Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	0	USD
CY2017Q4	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-1570016	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-1570016	USD
CY2015	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	232260000	USD
CY2016	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	109005900	USD
CY2017	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	-114303000	USD
CY2015	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	0	USD
CY2016	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	0	USD
CY2017	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	124493000	USD
CY2015	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	-412223000	USD
CY2016	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	-103214000	USD
CY2017	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	-3767000	USD
CY2015	us-gaap	Income Tax Reconciliation Nondeductible Expense Other IncomeTaxReconciliationNondeductibleExpenseOther	470000	USD
CY2016	us-gaap	Income Tax Reconciliation Nondeductible Expense Other IncomeTaxReconciliationNondeductibleExpenseOther	82000	USD
CY2017	us-gaap	Income Tax Reconciliation Nondeductible Expense Other IncomeTaxReconciliationNondeductibleExpenseOther	22000	USD
CY2015	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	307000	USD
CY2016	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	-834900	USD
CY2017	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	0	USD
CY2015	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	586796	USD
CY2016	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	-135179	USD
CY2017	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	460984	USD
CY2015	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	-23825000	USD
CY2016	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	-6306000	USD
CY2017	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	-8476000	USD
CY2015	us-gaap	Income Taxes Paid IncomeTaxesPaid	3258160	USD
CY2016	us-gaap	Income Taxes Paid IncomeTaxesPaid	0	USD
CY2017	us-gaap	Income Taxes Paid IncomeTaxesPaid	0	USD
CY2016Q4	us-gaap	Income Taxes Receivable IncomeTaxesReceivable	1402179	USD
CY2017Q4	us-gaap	Income Taxes Receivable IncomeTaxesReceivable	785016	USD
CY2015	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-4545304	USD
CY2016	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-365103	USD
CY2017	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	2611492	USD
CY2015	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-27701606	USD
CY2016	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-15604984	USD
CY2017	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	9717487	USD
CY2015	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	210295	USD
CY2016	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	-1556673	USD
CY2017	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	253517	USD
CY2015	us-gaap	Increase Decrease In Estimated Future Development Costs IncreaseDecreaseInEstimatedFutureDevelopmentCosts	235578690	USD
CY2016	us-gaap	Increase Decrease In Estimated Future Development Costs IncreaseDecreaseInEstimatedFutureDevelopmentCosts	57481060	USD
CY2017	us-gaap	Increase Decrease In Estimated Future Development Costs IncreaseDecreaseInEstimatedFutureDevelopmentCosts	-34753469	USD
CY2015	us-gaap	Increase Decrease In Future Income Tax Expense Estimates On Future Cash Flows Related To Proved Oil And Gas Reserves IncreaseDecreaseInFutureIncomeTaxExpenseEstimatesOnFutureCashFlowsRelatedToProvedOilAndGasReserves	295949531	USD
CY2016	us-gaap	Increase Decrease In Future Income Tax Expense Estimates On Future Cash Flows Related To Proved Oil And Gas Reserves IncreaseDecreaseInFutureIncomeTaxExpenseEstimatesOnFutureCashFlowsRelatedToProvedOilAndGasReserves	497950	USD
CY2017	us-gaap	Increase Decrease In Future Income Tax Expense Estimates On Future Cash Flows Related To Proved Oil And Gas Reserves IncreaseDecreaseInFutureIncomeTaxExpenseEstimatesOnFutureCashFlowsRelatedToProvedOilAndGasReserves	-3617100	USD
CY2015	us-gaap	Increase Decrease In Income Taxes Receivable IncreaseDecreaseInIncomeTaxesReceivable	0	USD
CY2016	us-gaap	Increase Decrease In Income Taxes Receivable IncreaseDecreaseInIncomeTaxesReceivable	1402179	USD
CY2017	us-gaap	Increase Decrease In Income Taxes Receivable IncreaseDecreaseInIncomeTaxesReceivable	-617163	USD
CY2015	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	590630	USD
CY2016	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	-90593	USD
CY2017	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	142318	USD
CY2015	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-2220	USD
CY2016	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	691261	USD
CY2015	us-gaap	Increase Due To Purchases Of Minerals In Place IncreaseDueToPurchasesOfMineralsInPlace	0	USD
CY2016	us-gaap	Increase Due To Purchases Of Minerals In Place IncreaseDueToPurchasesOfMineralsInPlace	9576760	USD
CY2017	us-gaap	Increase Due To Purchases Of Minerals In Place IncreaseDueToPurchasesOfMineralsInPlace	0	USD
CY2017	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	749159	USD
CY2016	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	0	shares
CY2017	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	0	shares
CY2015	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	0	shares
CY2015	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	1506172	USD
CY2016	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	356196	USD
CY2017	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	147775	USD
CY2015	us-gaap	Interest Expense InterestExpense	58360387	USD
CY2016	us-gaap	Interest Expense InterestExpense	64485623	USD
CY2017	us-gaap	Interest Expense InterestExpense	70286341	USD
CY2015	us-gaap	Interest Paid InterestPaid	55209662	USD
CY2016	us-gaap	Interest Paid InterestPaid	60480783	USD
CY2017	us-gaap	Interest Paid InterestPaid	65565698	USD
CY2016Q4	us-gaap	Interest Payable Current InterestPayableCurrent	4682894	USD
CY2017Q4	us-gaap	Interest Payable Current InterestPayableCurrent	4836112	USD
CY2016Q4	us-gaap	Liabilities Liabilities	918954629	USD
CY2017Q4	us-gaap	Liabilities Liabilities	1123094229	USD
CY2016Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	431532961	USD
CY2017Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	632253679	USD
CY2016Q4	us-gaap	Liabilities Current LiabilitiesCurrent	77443666	USD
CY2017Q4	us-gaap	Liabilities Current LiabilitiesCurrent	123575246	USD
CY2015	us-gaap	Litigation Settlement Expense LitigationSettlementExpense	0	USD
CY2016	us-gaap	Litigation Settlement Expense LitigationSettlementExpense	0	USD
CY2017	us-gaap	Litigation Settlement Expense LitigationSettlementExpense	2820000	USD
CY2016Q4	us-gaap	Long Term Debt LongTermDebt	832625125	USD
CY2017Q4	us-gaap	Long Term Debt LongTermDebt	979324222	USD
CY2016Q4	us-gaap	Long Term Line Of Credit LongTermLineOfCredit	832625125	USD
CY2017Q4	us-gaap	Long Term Line Of Credit LongTermLineOfCredit	979324222	USD
CY2015	us-gaap	Net Cash Provided By Used In Financing Activities Continuing Operations NetCashProvidedByUsedInFinancingActivitiesContinuingOperations	35972826	USD
CY2016	us-gaap	Net Cash Provided By Used In Financing Activities Continuing Operations NetCashProvidedByUsedInFinancingActivitiesContinuingOperations	-7831775	USD
CY2017	us-gaap	Net Cash Provided By Used In Financing Activities Continuing Operations NetCashProvidedByUsedInFinancingActivitiesContinuingOperations	141969778	USD
CY2015	us-gaap	Net Cash Provided By Used In Investing Activities Continuing Operations NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	-288935667	USD
CY2016	us-gaap	Net Cash Provided By Used In Investing Activities Continuing Operations NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	-90964087	USD
CY2017	us-gaap	Net Cash Provided By Used In Investing Activities Continuing Operations NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	-119239747	USD
CY2015	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	247015718	USD
CY2016	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	101891571	USD
CY2017	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	72967062	USD
CY2015	us-gaap	Net Income Loss NetIncomeLoss	-975354541	USD
CY2016Q1	us-gaap	Net Income Loss NetIncomeLoss	-126565754	USD
CY2016Q2	us-gaap	Net Income Loss NetIncomeLoss	-108978662	USD
CY2016Q3	us-gaap	Net Income Loss NetIncomeLoss	-45618895	USD
CY2016Q4	us-gaap	Net Income Loss NetIncomeLoss	-12330397	USD
CY2016	us-gaap	Net Income Loss NetIncomeLoss	-293493708	USD
CY2017Q1	us-gaap	Net Income Loss NetIncomeLoss	16940523	USD
CY2017Q2	us-gaap	Net Income Loss NetIncomeLoss	13801859	USD
CY2017Q3	us-gaap	Net Income Loss NetIncomeLoss	-16087467	USD
CY2017Q4	us-gaap	Net Income Loss NetIncomeLoss	-23848687	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	-9193772	USD
CY2017	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-71258384	USD
CY2015	us-gaap	Oil And Gas Production Expense OilAndGasProductionExpense	52107984	USD
CY2015	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	-975354541	USD
CY2016	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	-293493708	USD
CY2017	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	-9193772	USD
CY2015	us-gaap	Net Increase Decrease In Sales And Transfer Prices And Production Costs NetIncreaseDecreaseInSalesAndTransferPricesAndProductionCosts	-1384474928	USD
CY2016	us-gaap	Net Increase Decrease In Sales And Transfer Prices And Production Costs NetIncreaseDecreaseInSalesAndTransferPricesAndProductionCosts	-174656448	USD
CY2017	us-gaap	Net Increase Decrease In Sales And Transfer Prices And Production Costs NetIncreaseDecreaseInSalesAndTransferPricesAndProductionCosts	216216656	USD
CY2015	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-58390478	USD
CY2016	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-65591032	USD
CY2016	us-gaap	Oil And Gas Production Expense OilAndGasProductionExpense	45680110	USD
CY2017	us-gaap	Oil And Gas Production Expense OilAndGasProductionExpense	49732861	USD
CY2015	us-gaap	Oil And Gas Sales Revenue OilAndGasSalesRevenue	202638640	USD
CY2016	us-gaap	Oil And Gas Sales Revenue OilAndGasSalesRevenue	159690883	USD
CY2017	us-gaap	Oil And Gas Sales Revenue OilAndGasSalesRevenue	223963010	USD
CY2015	us-gaap	Operating Expenses OperatingExpenses	1394445680	USD
CY2016Q1	us-gaap	Operating Expenses OperatingExpenses	141220772	USD
CY2016Q2	us-gaap	Operating Expenses OperatingExpenses	124946744	USD
CY2016Q3	us-gaap	Operating Expenses OperatingExpenses	74583046	USD
CY2016Q4	us-gaap	Operating Expenses OperatingExpenses	33457789	USD
CY2016	us-gaap	Operating Expenses OperatingExpenses	374208351	USD
CY2017Q1	us-gaap	Operating Expenses OperatingExpenses	32572699	USD
CY2017Q2	us-gaap	Operating Expenses OperatingExpenses	34576905	USD
CY2017Q3	us-gaap	Operating Expenses OperatingExpenses	41013678	USD
CY2017Q4	us-gaap	Operating Expenses OperatingExpenses	40661791	USD
CY2017	us-gaap	Operating Expenses OperatingExpenses	148825073	USD
CY2015	us-gaap	Operating Income Loss OperatingIncomeLoss	-1119388267	USD
CY2016Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	-109384536	USD
CY2016Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	-92932518	USD
CY2016Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	-29473638	USD
CY2016Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	2485837	USD
CY2016	us-gaap	Operating Income Loss OperatingIncomeLoss	-229304855	USD
CY2017Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	33244148	USD
CY2017Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	30324977	USD
CY2017Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	584981	USD
CY2017Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	-3659510	USD
CY2017	us-gaap	Operating Income Loss OperatingIncomeLoss	60494596	USD
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Due OperatingLeasesFutureMinimumPaymentsDue	1395000	USD
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Due Current OperatingLeasesFutureMinimumPaymentsDueCurrent	342000	USD
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	340000	USD
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	361000	USD
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	352000	USD
CY2015	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-30091	USD
CY2015	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	287000	USD
CY2016	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	320000	USD
CY2017	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	369000	USD
CY2016Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	8430359	USD
CY2017Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	5490934	USD
CY2016Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	156632	USD
CY2017	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	300000000	USD
CY2015	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	150000000	USD
CY2017Q1	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-16303805	USD
CY2017Q2	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-16523118	USD
CY2016	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	63000000	USD
CY2017	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	36000000	USD
CY2017	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-31623	USD
CY2017Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	135225	USD
CY2015	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-1696114	USD
CY2016	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-373983	USD
CY2016Q1	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-17181218	USD
CY2016Q2	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-16046144	USD
CY2016Q3	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-16145257	USD
CY2016Q4	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-16218413	USD
CY2016	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-15902	USD
CY2017Q3	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-16672448	USD
CY2017Q4	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-21759013	USD
CY2017	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	116042	USD
CY2015	us-gaap	Other Sales Revenue Net OtherSalesRevenueNet	35866	USD
CY2016	us-gaap	Other Sales Revenue Net OtherSalesRevenueNet	31347	USD
CY2017	us-gaap	Other Sales Revenue Net OtherSalesRevenueNet	23314	USD
CY2015	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	5687596	USD
CY2016	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	428515	USD
CY2017	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	13361833	USD
CY2015	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	339578	USD
CY2016	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	1403260	USD
CY2017	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	668389	USD
CY2015	us-gaap	Payments To Acquire Oil And Gas Property And Equipment PaymentsToAcquireOilAndGasPropertyAndEquipment	289055440	USD
CY2016	us-gaap	Payments To Acquire Oil And Gas Property And Equipment PaymentsToAcquireOilAndGasPropertyAndEquipment	92935905	USD
CY2017	us-gaap	Payments To Acquire Oil And Gas Property And Equipment PaymentsToAcquireOilAndGasPropertyAndEquipment	119407244	USD
CY2015	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	90751	USD
CY2016	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	214685	USD
CY2017	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	3954	USD
CY2016Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.001
CY2017Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.001
CY2016Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	5000000	shares
CY2017Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	5000000	shares
CY2016Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2017Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2016Q4	us-gaap	Preferred Stock Value PreferredStockValue	0	USD
CY2017Q4	us-gaap	Preferred Stock Value PreferredStockValue	0	USD
CY2016Q4	us-gaap	Prepaid Expense And Other Assets PrepaidExpenseAndOtherAssets	1584129	USD
CY2017Q4	us-gaap	Prepaid Expense And Other Assets PrepaidExpenseAndOtherAssets	2333288	USD
CY2015	us-gaap	Previously Estimated Development Costs Incurred PreviouslyEstimatedDevelopmentCostsIncurred	114208095	USD
CY2016	us-gaap	Previously Estimated Development Costs Incurred PreviouslyEstimatedDevelopmentCostsIncurred	23271960	USD
CY2017	us-gaap	Previously Estimated Development Costs Incurred PreviouslyEstimatedDevelopmentCostsIncurred	46833826	USD
CY2015	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	0	USD
CY2016	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	0	USD
CY2015	us-gaap	Proceeds From Sale Of Oil And Gas Property And Equipment ProceedsFromSaleOfOilAndGasPropertyAndEquipment	138524	USD
CY2017	us-gaap	Proceeds From Unsecured Notes Payable ProceedsFromUnsecuredNotesPayable	0	USD
CY2015	us-gaap	Production Tax Expense ProductionTaxExpense	21566634	USD
CY2016	us-gaap	Proceeds From Sale Of Oil And Gas Property And Equipment ProceedsFromSaleOfOilAndGasPropertyAndEquipment	2172003	USD
CY2017	us-gaap	Proceeds From Sale Of Oil And Gas Property And Equipment ProceedsFromSaleOfOilAndGasPropertyAndEquipment	171451	USD
CY2015	us-gaap	Proceeds From Unsecured Notes Payable ProceedsFromUnsecuredNotesPayable	190000000	USD
CY2016	us-gaap	Proceeds From Unsecured Notes Payable ProceedsFromUnsecuredNotesPayable	0	USD
CY2016	us-gaap	Sales And Transfers Of Oil And Gas Produced Net Of Production Costs SalesAndTransfersOfOilAndGasProducedNetOfProductionCosts	98497165	USD
CY2015	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	72000	USD
CY2016	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	14500	USD
CY2017	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	0	USD
CY2016	us-gaap	Production Tax Expense ProductionTaxExpense	15513608	USD
CY2017	us-gaap	Production Tax Expense ProductionTaxExpense	20604256	USD
CY2016Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	2432196199	USD
CY2017Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	2588170780	USD
CY2016Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	376208433	USD
CY2017Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	473219591	USD
CY2016Q4	us-gaap	Property Plant And Equipment Other PropertyPlantAndEquipmentOther	977349	USD
CY2017Q4	us-gaap	Property Plant And Equipment Other PropertyPlantAndEquipmentOther	981303	USD
CY2015	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	6200000	USD
CY2016	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	800000	USD
CY2017	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	700000	USD
CY2015	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	298000000	USD
CY2016	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	69000000	USD
CY2017	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	180000000	USD
CY2015	us-gaap	Restricted Stock Value Shares Issued Net Of Tax Withholdings RestrictedStockValueSharesIssuedNetOfTaxWithholdings	300000	USD
CY2016	us-gaap	Restricted Stock Value Shares Issued Net Of Tax Withholdings RestrictedStockValueSharesIssuedNetOfTaxWithholdings	1400000	USD
CY2017	us-gaap	Restricted Stock Value Shares Issued Net Of Tax Withholdings RestrictedStockValueSharesIssuedNetOfTaxWithholdings	700000	USD
CY2015	us-gaap	Results Of Operations Depreciation Depletion Amortization And Accretion ResultsOfOperationsDepreciationDepletionAmortizationAndAccretion	137769812	USD
CY2016	us-gaap	Results Of Operations Depreciation Depletion Amortization And Accretion ResultsOfOperationsDepreciationDepletionAmortizationAndAccretion	61244158	USD
CY2017	us-gaap	Results Of Operations Depreciation Depletion Amortization And Accretion ResultsOfOperationsDepreciationDepletionAmortizationAndAccretion	59500155	USD
CY2016Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-931379960	USD
CY2017Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-940573732	USD
CY2015	us-gaap	Revenues Revenues	275057413	USD
CY2016Q1	us-gaap	Revenues Revenues	31836236	USD
CY2016Q2	us-gaap	Revenues Revenues	32014226	USD
CY2016Q3	us-gaap	Revenues Revenues	45109408	USD
CY2016Q4	us-gaap	Revenues Revenues	35943626	USD
CY2016	us-gaap	Revenues Revenues	144903496	USD
CY2017Q1	us-gaap	Revenues Revenues	65816847	USD
CY2017Q2	us-gaap	Revenues Revenues	64901882	USD
CY2017Q3	us-gaap	Revenues Revenues	41598659	USD
CY2017Q4	us-gaap	Revenues Revenues	37002281	USD
CY2017	us-gaap	Revenues Revenues	209319669	USD
CY2015	us-gaap	Revisions Of Previous Quantity Estimates RevisionsOfPreviousQuantityEstimates	-363975445	USD
CY2016	us-gaap	Revisions Of Previous Quantity Estimates RevisionsOfPreviousQuantityEstimates	-130664183	USD
CY2015	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod	0	shares
CY2017	us-gaap	Revisions Of Previous Quantity Estimates RevisionsOfPreviousQuantityEstimates	28914878	USD
CY2015	us-gaap	Sales And Transfers Of Oil And Gas Produced Net Of Production Costs SalesAndTransfersOfOilAndGasProducedNetOfProductionCosts	128964023	USD
CY2017	us-gaap	Sales And Transfers Of Oil And Gas Produced Net Of Production Costs SalesAndTransfersOfOilAndGasProducedNetOfProductionCosts	153625893	USD
CY2015	us-gaap	Share Based Compensation ShareBasedCompensation	5234115	USD
CY2016	us-gaap	Share Based Compensation ShareBasedCompensation	3464040	USD
CY2017	us-gaap	Share Based Compensation ShareBasedCompensation	3286566	USD
CY2015	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Expirations In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod	0	shares
CY2016	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Expirations In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod	0	shares
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Expirations In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod	141872	shares
CY2016	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod	0	shares
CY2015	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	0	shares
CY2016	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	250000	shares
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	0	shares
CY2014Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	66680	USD
CY2015Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	0	USD
CY2016Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	0	USD
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	0	USD
CY2014Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	141872	shares
CY2015Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	141872	shares
CY2016Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	391872	shares
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	250000	shares
CY2014Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	5.18
CY2015Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	5.18
CY2016Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	3.66
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	2.79
CY2015	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	0.00
CY2016	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	0.00
CY2017	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	0.00
CY2015	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Expirations In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice	0.00
CY2016	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Expirations In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice	0.00
CY2017	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Expirations In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice	0.00
CY2015	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice	0.00
CY2016	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice	0.00
CY2015	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	0.00
CY2016	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	2.79
CY2017	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	0.00
CY2014	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P2Y9M18D
CY2015	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P1Y9M18D
CY2016	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P2Y10M24D
CY2017	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P1Y
CY2015	us-gaap	Shares Paid For Tax Withholding For Share Based Compensation SharesPaidForTaxWithholdingForShareBasedCompensation	57929	shares
CY2015	us-gaap	Shares Paid For Tax Withholding For Share Based Compensation SharesPaidForTaxWithholdingForShareBasedCompensation	100000	shares
CY2016	us-gaap	Shares Paid For Tax Withholding For Share Based Compensation SharesPaidForTaxWithholdingForShareBasedCompensation	400000	shares
CY2016	us-gaap	Shares Paid For Tax Withholding For Share Based Compensation SharesPaidForTaxWithholdingForShareBasedCompensation	375875	shares
CY2017	us-gaap	Shares Paid For Tax Withholding For Share Based Compensation SharesPaidForTaxWithholdingForShareBasedCompensation	270510	shares
CY2017	us-gaap	Shares Paid For Tax Withholding For Share Based Compensation SharesPaidForTaxWithholdingForShareBasedCompensation	300000	shares
CY2015	us-gaap	Standardized Measure Of Discounted Future Net Cash Flow Of Proved Oil And Gas Reserves Other StandardizedMeasureOfDiscountedFutureNetCashFlowOfProvedOilAndGasReservesOther	134104878	USD
CY2016	us-gaap	Standardized Measure Of Discounted Future Net Cash Flow Of Proved Oil And Gas Reserves Other StandardizedMeasureOfDiscountedFutureNetCashFlowOfProvedOilAndGasReservesOther	105092	USD
CY2017	us-gaap	Standardized Measure Of Discounted Future Net Cash Flow Of Proved Oil And Gas Reserves Other StandardizedMeasureOfDiscountedFutureNetCashFlowOfProvedOilAndGasReservesOther	19903072	USD
CY2015	us-gaap	Standardized Measure Of Discounted Future Net Cash Flow Relating To Proved Oil And Gas Reserves Accretion Of Discount StandardizedMeasureOfDiscountedFutureNetCashFlowRelatingToProvedOilAndGasReservesAccretionOfDiscount	170222344	USD
CY2016	us-gaap	Standardized Measure Of Discounted Future Net Cash Flow Relating To Proved Oil And Gas Reserves Accretion Of Discount StandardizedMeasureOfDiscountedFutureNetCashFlowRelatingToProvedOilAndGasReservesAccretionOfDiscount	57569313	USD
CY2017	us-gaap	Standardized Measure Of Discounted Future Net Cash Flow Relating To Proved Oil And Gas Reserves Accretion Of Discount StandardizedMeasureOfDiscountedFutureNetCashFlowRelatingToProvedOilAndGasReservesAccretionOfDiscount	37942243	USD
CY2014Q4	us-gaap	Standardized Measure Of Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves StandardizedMeasureOfDiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReserves	1405379543	USD
CY2015Q4	us-gaap	Standardized Measure Of Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves StandardizedMeasureOfDiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReserves	574798763	USD
CY2016Q4	us-gaap	Standardized Measure Of Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves StandardizedMeasureOfDiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReserves	379026013	USD
CY2017Q4	us-gaap	Standardized Measure Of Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves StandardizedMeasureOfDiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReserves	753986097	USD
CY2015	us-gaap	Stock Granted During Period Value Sharebased Compensation StockGrantedDuringPeriodValueSharebasedCompensation	7228252	USD
CY2016	us-gaap	Stock Granted During Period Value Sharebased Compensation StockGrantedDuringPeriodValueSharebasedCompensation	7231175	USD
CY2017	us-gaap	Stock Issued During Period Shares Restricted Stock Award Gross StockIssuedDuringPeriodSharesRestrictedStockAwardGross	911355	shares
CY2017	us-gaap	Stock Granted During Period Value Sharebased Compensation StockGrantedDuringPeriodValueSharebasedCompensation	3646065	USD
CY2015	us-gaap	Stock Issued During Period Shares Restricted Stock Award Gross StockIssuedDuringPeriodSharesRestrictedStockAwardGross	2112998	shares
CY2016	us-gaap	Stock Issued During Period Shares Restricted Stock Award Gross StockIssuedDuringPeriodSharesRestrictedStockAwardGross	2109814	shares
CY2015	us-gaap	Stock Issued During Period Shares Share Based Compensation Forfeited StockIssuedDuringPeriodSharesShareBasedCompensationForfeited	1397	shares
CY2016	us-gaap	Stock Issued During Period Shares Share Based Compensation Forfeited StockIssuedDuringPeriodSharesShareBasedCompensationForfeited	1594542	shares
CY2017	us-gaap	Stock Issued During Period Shares Share Based Compensation Forfeited StockIssuedDuringPeriodSharesShareBasedCompensationForfeited	108993	shares
CY2017	us-gaap	Stock Issued During Period Shares Share Based Compensation Forfeited StockIssuedDuringPeriodSharesShareBasedCompensationForfeited	100000	shares
CY2015	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	0	shares
CY2016	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	0	shares
CY2017	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	0	shares
CY2015	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	2113	USD
CY2016	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	2110	USD
CY2017	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	2820911	USD
CY2016	us-gaap	Stock Issued During Period Value Restricted Stock Award Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardForfeitures	2155872	USD
CY2017	us-gaap	Stock Issued During Period Value Restricted Stock Award Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardForfeitures	23697	USD
CY2011Q2	us-gaap	Stock Repurchase Program Authorized Amount1 StockRepurchaseProgramAuthorizedAmount1	150000000	USD
CY2016Q4	us-gaap	Stockholders Equity StockholdersEquity	-487421668	USD
CY2017Q4	us-gaap	Stockholders Equity StockholdersEquity	-490840550	USD
CY2014Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	770861641	USD
CY2015Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	-197602113	USD
CY2016Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	-487421668	USD
CY2017Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	-490840550	USD
CY2015	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	-88715603	USD
CY2016	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	-76346935	USD
CY2017	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	-18443443	USD
CY2015	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	60652447	shares
CY2016	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	61173547	shares
CY2017	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	62408855	shares
CY2015	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	60652447	shares
CY2016	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	61173547	shares
CY2017	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	62408855	shares
CY2015	us-gaap	Write Off Of Deferred Debt Issuance Cost WriteOffOfDeferredDebtIssuanceCost	0	USD
CY2016	us-gaap	Write Off Of Deferred Debt Issuance Cost WriteOffOfDeferredDebtIssuanceCost	1089507	USD
CY2016	us-gaap	Write Off Of Deferred Debt Issuance Cost WriteOffOfDeferredDebtIssuanceCost	1100000	USD
CY2017	us-gaap	Write Off Of Deferred Debt Issuance Cost WriteOffOfDeferredDebtIssuanceCost	95135	USD
CY2017	us-gaap	Write Off Of Deferred Debt Issuance Cost WriteOffOfDeferredDebtIssuanceCost	100000	USD
CY2017	us-gaap	Concentration Risk Credit Risk ConcentrationRiskCreditRisk	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;text-decoration:underline;">Concentrations of Market and Credit Risk</font></div><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="line-height:120%;text-align:justify;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">The future results of the Company’s crude oil and natural gas operations will be affected by the market prices of crude oil and natural gas.  The availability of a ready market for crude oil and natural gas products in the future will depend on numerous factors beyond the control of the Company, including weather, imports, marketing of competitive fuels, proximity and capacity of crude oil and natural gas pipelines and other transportation facilities, any oversupply or undersupply of crude oil, natural gas and liquid products, the regulatory environment, the economic environment, and other regional and political events, none of which can be predicted with certainty.</font></div><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="line-height:120%;text-align:justify;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">The Company operates in the exploration, development and production sector of the crude oil and natural gas industry.  The Company’s receivables include amounts due from purchasers of its crude oil and natural gas production.  While certain of these customers are affected by periodic downturns in the economy in general or in their specific segment of the crude oil or natural gas industry, the Company believes that its level of credit-related losses due to such economic fluctuations has been and will continue to be immaterial to the Company’s results of operations over the long-term.</font></div><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="line-height:120%;text-align:justify;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">The Company manages and controls market and counterparty credit risk. In the normal course of business, collateral is not required for financial instruments with credit risk. Financial instruments which potentially subject the Company to credit risk consist principally of temporary cash balances and derivative financial instruments. The Company maintains cash and cash equivalents in bank deposit accounts which, at times, may exceed the federally insured limits. The Company has not experienced any significant losses from such investments. The Company attempts to limit the amount of credit exposure to any one financial institution or company. The Company believes the credit quality of its counterparties is generally high. In the normal course of business, letters of credit or parent guarantees may be required for counterparties which management perceives to have a higher credit risk.</font></div></div>
CY2017	us-gaap	Nature Of Operations NatureOfOperations	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">ORGANIZATION AND NATURE OF BUSINESS</font></div><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="line-height:120%;text-align:justify;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Northern Oil and Gas, Inc. (the “Company,” “Northern,” “our” and words of similar import), a Minnesota corporation, is an independent energy company engaged in the acquisition, exploration, exploitation, development and production of crude oil and natural gas properties.  The Company’s common stock trades on the NYSE American market under the symbol “NOG”.</font></div><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="line-height:120%;text-align:justify;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Northern’s principal business is crude oil and natural gas exploration, development, and production with operations in North Dakota and Montana that primarily target the Bakken and Three Forks formations in the Williston Basin of the United States.  The Company acquires leasehold interests that comprise of non-operated working interests in wells and in drilling projects within its area of operations.  As of </font><font style="font-family:inherit;font-size:10pt;">December 31, 2017</font><font style="font-family:inherit;font-size:10pt;">, approximately </font><font style="font-family:inherit;font-size:10pt;">87%</font><font style="font-family:inherit;font-size:10pt;"> of Northern’s </font><font style="font-family:inherit;font-size:10pt;">143,253</font><font style="font-family:inherit;font-size:10pt;"> total net acres were developed.</font></div></div>
CY2017	us-gaap	Prior Period Reclassification Adjustment Description PriorPeriodReclassificationAdjustmentDescription	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;text-decoration:underline;">Reclassifications</font></div><div style="line-height:120%;text-align:justify;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="line-height:120%;text-align:justify;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Certain prior period balances in the balance sheets have been reclassified to conform to the current year presentation. Such reclassifications had no impact on net loss, cash flows or stockholders’ deficit previously reported.</font></div></div>
CY2017	us-gaap	Use Of Estimates UseOfEstimates	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;text-decoration:underline;">Use of Estimates</font></div><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="line-height:120%;text-align:justify;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">The preparation of financial statements under GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period.  The most significant estimates relate to proved crude oil and natural gas reserve volumes, future development costs, estimates relating to certain crude oil and natural gas revenues and expenses, fair value of derivative instruments, impairment of oil and natural gas properties, and deferred income taxes.  Actual results may differ from those estimates.</font></div></div>

Files In Submission

Name	View Source	Status
0001104485-18-000023-index-headers.html	Edgar Link	pending
0001104485-18-000023-index.html	Edgar Link	pending
0001104485-18-000023.txt	Edgar Link	pending
0001104485-18-000023-xbrl.zip	Edgar Link	pending
chart-f195b21662d05e03a86.jpg	Edgar Link	pending
exhibit1024-exchangeagreem.htm	Edgar Link	pending
exhibit12-201710k.htm	Edgar Link	pending
exhibit231-consentx201710k.htm	Edgar Link	pending
exhibit232-consentx201710k.htm	Edgar Link	pending
exhibit311-201710k.htm	Edgar Link	pending
exhibit312-201710k.htm	Edgar Link	pending
exhibit321-201710k.htm	Edgar Link	pending
exhibit991-201710k.htm	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
nog-20171231.xml	Edgar Link	completed
nog-20171231.xsd	Edgar Link	pending
nog-20171231x10k.htm	Edgar Link	pending
nog-20171231_cal.xml	Edgar Link	unprocessable
nog-20171231_def.xml	Edgar Link	unprocessable
nog-20171231_lab.xml	Edgar Link	unprocessable
nog-20171231_pre.xml	Edgar Link	unprocessable
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report.css	Edgar Link	pending
Show.js	Edgar Link	pending

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$NOG
NORTHERN OIL & GAS, INC. Stock $nog

2016 Q4 Form 10-K Financial Statement

#000110448518000023 Filed on February 23, 2018

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$NOG NORTHERN OIL & GAS, INC. Stock $nog

2016 Q4 Form 10-K Financial Statement

#000110448518000023 Filed on February 23, 2018

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$NOG
NORTHERN OIL & GAS, INC. Stock $nog