$UNTC
Unit Corp Stock $untc

$untc Overview Financials Valuation SEC Filings Company Website

2016 Q4 Form 10-K Financial Statement

#000079894917000004 Filed on February 28, 2017

Income Statement

Concept	2016 Q4	2015 Q4	2015 Q3
Revenue	$174.3M	$172.3M	$212.4M
YoY Change	1.15%	-54.49%	-47.03%
Cost Of Revenue	$87.60M	$179.7M	$196.9M
YoY Change	-51.25%	-54.12%	-33.7%
Gross Profit	$36.78M	-$492.9M	-$314.7M
YoY Change	-107.46%	448.89%	-402.6%
Gross Profit Margin	21.11%	-286.07%	-148.15%
Selling, General & Admin	$7.300M	$8.700M	$7.600M
YoY Change	-16.09%	-25.0%	-25.49%
% of Gross Profit	19.85%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$48.40M	$75.10M	$14.26M
YoY Change	-35.55%	-32.04%	-86.24%
% of Gross Profit	131.59%
Operating Expenses	$57.40M	$8.700M	$526.8M
YoY Change	559.77%	-25.0%	5064.73%
Operating Profit	-$20.62M	-$501.6M	-$314.4M
YoY Change	-95.89%	394.67%	-402.37%
Interest Expense	-$27.60M	$4.900M	$0.00
YoY Change	-663.27%	-85.67%	-100.0%
% of Operating Profit
Other Income/Expense, Net	$300.0K	$0.00	-$20.00K
YoY Change		-100.0%	-100.13%
Pretax Income	$3.600M	-$497.3M	-$329.3M
YoY Change	-100.72%	637.83%	-402.74%
Income Tax	$2.000M	-$188.0M	-$124.0M
% Of Pretax Income	55.56%
Net Earnings	$1.683M	-$309.3M	-$205.3M
YoY Change	-100.54%	626.98%	-404.02%
Net Earnings / Revenue	0.97%	-179.54%	-96.65%
Basic Earnings Per Share	$0.03	-$6.29	-$4.18
Diluted Earnings Per Share	$0.03	-$6.29	-$4.18
COMMON SHARES
Basic Shares Outstanding	51.49M shares	50.41M shares	49.16M shares
Diluted Shares Outstanding			49.16M shares

Balance Sheet

Concept	2016 Q4	2015 Q4	2015 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments	$900.0K	$800.0K	$900.0K
YoY Change	12.5%	-20.0%	0.0%
Cash & Equivalents	$893.0K	$835.0K	$894.0K
Short-Term Investments
Other Short-Term Assets	$32.90M	$34.90M	$36.40M
YoY Change	-5.73%	-37.79%	17.42%
Inventory	$3.300M	$3.600M	$7.700M
Prepaid Expenses
Receivables	$83.95M	$79.94M	$101.2M
Other Receivables	$100.0K	$21.00M	$4.400M
Total Short-Term Assets	$121.2M	$140.3M	$150.7M
YoY Change	-13.59%	-44.45%	-31.55%
LONG-TERM ASSETS
Property, Plant & Equipment	$2.281B	$2.581B	$3.047B
YoY Change	-11.62%	-37.55%	-26.14%
Goodwill	$62.81M	$62.81M	$62.81M
YoY Change	0.0%	0.0%	0.0%
Intangibles
YoY Change
Long-Term Investments
YoY Change
Other Assets	$13.82M	$14.68M	$14.90M
YoY Change	-5.89%	-0.69%	15.38%
Total Long-Term Assets	$2.358B	$2.660B	$3.134B
YoY Change	-11.34%	-36.84%	-25.59%
TOTAL ASSETS
Total Short-Term Assets	$121.2M	$140.3M	$150.7M
Total Long-Term Assets	$2.358B	$2.660B	$3.134B
Total Assets	$2.479B	$2.800B	$3.285B
YoY Change	-11.45%	-37.27%	-25.89%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$88.79M	$87.41M	$97.50M
YoY Change	1.58%	-59.99%	-58.99%
Accrued Expenses	$39.65M	$46.92M	$68.04M
YoY Change	-15.49%	-33.14%	-18.93%
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$164.9M	$150.9M	$182.4M
YoY Change	9.29%	-50.39%	-48.1%
LONG-TERM LIABILITIES
Long-Term Debt	$800.9M	$919.0M	$908.2M
YoY Change	-12.85%	13.15%	34.19%
Other Long-Term Liabilities	$103.1M	$140.3M	$137.0M
YoY Change	-26.56%	-5.68%	-6.95%
Total Long-Term Liabilities	$904.0M	$1.059B	$1.045B
YoY Change	-14.67%	10.24%	26.84%
TOTAL LIABILITIES
Total Short-Term Liabilities	$164.9M	$150.9M	$182.4M
Total Long-Term Liabilities	$904.0M	$1.059B	$1.045B
Total Liabilities	$1.069B	$1.210B	$1.228B
YoY Change	-11.68%	-4.34%	4.44%
SHAREHOLDERS EQUITY
Retained Earnings	$681.6M	$817.2M	$1.127B
YoY Change	-16.6%	-55.94%	-40.62%
Common Stock	$10.02M	$9.831M	$9.831M
YoY Change	1.88%	1.02%	1.04%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$1.194B	$1.314B	$1.618B
YoY Change
Total Liabilities & Shareholders Equity	$2.479B	$2.800B	$3.285B
YoY Change	-11.45%	-37.42%	-25.89%

Cashflow Statement

Concept	2016 Q4	2015 Q4	2015 Q3
OPERATING ACTIVITIES
Net Income	$1.683M	-$309.3M	-$205.3M
YoY Change	-100.54%	626.98%	-404.02%
Depreciation, Depletion And Amortization	$48.40M	$75.10M	$14.26M
YoY Change	-35.55%	-32.04%	-86.24%
Cash From Operating Activities	$42.30M	$65.40M	$123.9M
YoY Change	-35.32%	-59.0%	-44.69%
INVESTING ACTIVITIES
Capital Expenditures	$32.10M	$77.60M	$112.4M
YoY Change	-58.63%	-74.19%	-57.78%
Acquisitions
YoY Change
Other Investing Activities	$28.70M	$2.100M	$4.700M
YoY Change	1266.67%	-87.57%	-44.71%
Cash From Investing Activities	-$3.500M	-$75.60M	-$107.8M
YoY Change	-95.37%	-73.36%	-58.17%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-38.90M	10.00M	-16.00M
YoY Change	-489.0%	-91.97%	-147.9%
NET CHANGE
Cash From Operating Activities	42.30M	65.40M	123.9M
Cash From Investing Activities	-3.500M	-75.60M	-107.8M
Cash From Financing Activities	-38.90M	10.00M	-16.00M
Net Change In Cash	-100.0K	-200.0K	100.0K
YoY Change	-50.0%	-166.67%	-133.33%
FREE CASH FLOW
Cash From Operating Activities	$42.30M	$65.40M	$123.9M
Capital Expenditures	$32.10M	$77.60M	$112.4M
Free Cash Flow	$10.20M	-$12.20M	$11.50M
YoY Change	-183.61%	-91.36%	-127.25%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2016	dei	Document Period End Date DocumentPeriodEndDate	2016-12-31
CY2016	dei	Amendment Flag AmendmentFlag	false
CY2016	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2016	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2016	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2016
CY2016	dei	Document Type DocumentType	10-K
CY2016	dei	Entity Central Index Key EntityCentralIndexKey	0000798949
CY2017Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	51650140	shares
CY2016	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2016	dei	Entity Filer Category EntityFilerCategory	Accelerated Filer
CY2016Q2	dei	Entity Public Float EntityPublicFloat	495132341	USD
CY2016	dei	Entity Registrant Name EntityRegistrantName	UNIT CORP
CY2016	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2016	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	No
CY2016	dei	Trading Symbol TradingSymbol	unt
CY2015Q4	unt	Accrued Oil And Gas Production Expense Current AccruedOilAndGasProductionExpenseCurrent	17220000	USD
CY2016Q4	unt	Accrued Oil And Gas Production Expense Current AccruedOilAndGasProductionExpenseCurrent	10075000	USD
CY2015	unt	Asset Retirement Obligation Liabilities Sold AssetRetirementObligationLiabilitiesSold	421000	USD
CY2016	unt	Asset Retirement Obligation Liabilities Sold AssetRetirementObligationLiabilitiesSold	10882000	USD
CY2014Q4	unt	Capitalizedcostsofunprovedpropertiesincludedinamortizationcumulative Capitalizedcostsofunprovedpropertiesincludedinamortizationcumulative	73700000	USD
CY2015Q4	unt	Capitalizedcostsofunprovedpropertiesincludedinamortizationcumulative Capitalizedcostsofunprovedpropertiesincludedinamortizationcumulative	114400000	USD
CY2016Q4	unt	Capitalizedcostsofunprovedpropertiesincludedinamortizationcumulative Capitalizedcostsofunprovedpropertiesincludedinamortizationcumulative	7600000	USD
CY2016	unt	Capitalleasefairmarketvaluepercentageforpurchase Capitalleasefairmarketvaluepercentageforpurchase	0.10
CY2016Q4	unt	Capitalleasesfutureminimumpaymentsaverageannualpayment Capitalleasesfutureminimumpaymentsaverageannualpayment	4100000	USD
CY2016	unt	Capitalleaseterm Capitalleaseterm	P7Y
CY2014	unt	Contract Drilling Fees ContractDrillingFees	4000	USD
CY2015	unt	Contract Drilling Fees ContractDrillingFees	0	USD
CY2016	unt	Contract Drilling Fees ContractDrillingFees	0	USD
CY2014Q4	unt	Contract Drilling Identifiable Assets ContractDrillingIdentifiableAssets	1059980000	USD
CY2015Q4	unt	Contract Drilling Identifiable Assets ContractDrillingIdentifiableAssets	993015000	USD
CY2016Q4	unt	Contract Drilling Identifiable Assets ContractDrillingIdentifiableAssets	941676000	USD
CY2014Q4	unt	Corporate Assets CorporateAssets	30300000	USD
CY2015Q4	unt	Corporate Assets CorporateAssets	60240000	USD
CY2016Q4	unt	Corporate Assets CorporateAssets	52680000	USD
CY2014Q4	unt	Corporatelandandbuildingnet Corporatelandandbuildingnet	16104000	USD
CY2015Q4	unt	Corporatelandandbuildingnet Corporatelandandbuildingnet	49890000	USD
CY2016Q4	unt	Corporatelandandbuildingnet Corporatelandandbuildingnet	58188000	USD
CY2014	unt	Costs Incurred In Asset Retirement Obligation CostsIncurredInAssetRetirementObligation	-37687000	USD
CY2015	unt	Costs Incurred In Asset Retirement Obligation CostsIncurredInAssetRetirementObligation	-5693000	USD
CY2016	unt	Costs Incurred In Asset Retirement Obligation CostsIncurredInAssetRetirementObligation	-30906000	USD
CY2016	unt	Current Ratio Of Credit Facility CurrentRatioOfCreditFacility	1 to 1
CY2016	unt	Debt Instrument Variable Interest Rate Payable Assessment Period DebtInstrumentVariableInterestRatePayableAssessmentPeriod	P90D
CY2015Q4	unt	Deferred Tax Assets Tax Deferred Expense Allowance For Losses And Nondeductible Accruals DeferredTaxAssetsTaxDeferredExpenseAllowanceForLossesAndNondeductibleAccruals	56479000	USD
CY2016Q4	unt	Deferred Tax Assets Tax Deferred Expense Allowance For Losses And Nondeductible Accruals DeferredTaxAssetsTaxDeferredExpenseAllowanceForLossesAndNondeductibleAccruals	53967000	USD
CY2015Q4	unt	Deferred Tax Liability Depreciation Depletion Amortization And Impairment DeferredTaxLiabilityDepreciationDepletionAmortizationAndImpairment	464295000	USD
CY2016Q4	unt	Deferred Tax Liability Depreciation Depletion Amortization And Impairment DeferredTaxLiabilityDepreciationDepletionAmortizationAndImpairment	440690000	USD
CY2016Q4	unt	Discountratecapitalleases Discountratecapitalleases	0.04
CY2014	unt	Eliminated Associated Operating Expense EliminatedAssociatedOperatingExpense	62400000	USD
CY2015	unt	Eliminated Associated Operating Expense EliminatedAssociatedOperatingExpense	18300000	USD
CY2016	unt	Eliminated Associated Operating Expense EliminatedAssociatedOperatingExpense	0	USD
CY2014	unt	Eliminated Yielding EliminatedYielding	27100000	USD
CY2015	unt	Eliminated Yielding EliminatedYielding	3800000	USD
CY2016	unt	Eliminated Yielding EliminatedYielding	0	USD
CY2016Q4	unt	Employee Service Share Based Compensation Allocation Of Unrecognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfUnrecognizedPeriodCostsCapitalizedAmount	1000000	USD
CY2014Q4	unt	Gas Gathering And Processing Identifiable Assets GasGatheringAndProcessingIdentifiableAssets	500255000	USD
CY2015Q4	unt	Gas Gathering And Processing Identifiable Assets GasGatheringAndProcessingIdentifiableAssets	478661000	USD
CY2016Q4	unt	Gas Gathering And Processing Identifiable Assets GasGatheringAndProcessingIdentifiableAssets	461600000	USD
CY2014	unt	General And Administrative Expense Reimbursement GeneralAndAdministrativeExpenseReimbursement	39000	USD
CY2015	unt	General And Administrative Expense Reimbursement GeneralAndAdministrativeExpenseReimbursement	18000	USD
CY2016	unt	General And Administrative Expense Reimbursement GeneralAndAdministrativeExpenseReimbursement	6000	USD
CY2016	unt	Impairmentofgasgatheringsystems Impairmentofgasgatheringsystems	0	USD
CY2014	unt	Increase Decrease In Accounts Payable Related To Purchases Of Property Plant And Equipment IncreaseDecreaseInAccountsPayableRelatedToPurchasesOfPropertyPlantAndEquipment	-31968000	USD
CY2015	unt	Increase Decrease In Accounts Payable Related To Purchases Of Property Plant And Equipment IncreaseDecreaseInAccountsPayableRelatedToPurchasesOfPropertyPlantAndEquipment	105157000	USD
CY2016	unt	Increase Decrease In Accounts Payable Related To Purchases Of Property Plant And Equipment IncreaseDecreaseInAccountsPayableRelatedToPurchasesOfPropertyPlantAndEquipment	21190000	USD
CY2014	unt	Incremental Per Share Effect Of Dilutive Income Changes Over Dilutive Share Changes IncrementalPerShareEffectOfDilutiveIncomeChangesOverDilutiveShareChanges	-0.02
CY2015	unt	Incremental Per Share Effect Of Dilutive Income Changes Over Dilutive Share Changes IncrementalPerShareEffectOfDilutiveIncomeChangesOverDilutiveShareChanges	0.00
CY2016	unt	Incremental Per Share Effect Of Dilutive Income Changes Over Dilutive Share Changes IncrementalPerShareEffectOfDilutiveIncomeChangesOverDilutiveShareChanges	0.00
CY2016Q4	unt	Loan Origination Fees LoanOriginationFees	1000000	USD
CY2015Q4	unt	Natural Gas Gathering Systems And Treating Plants NaturalGasGatheringSystemsAndTreatingPlants	689063000	USD
CY2016Q4	unt	Natural Gas Gathering Systems And Treating Plants NaturalGasGatheringSystemsAndTreatingPlants	705859000	USD
CY2014	unt	Non Cash Ceiling Test Write Down Net Of Tax NonCashCeilingTestWriteDownNetOfTax	47700000	USD
CY2015	unt	Non Cash Ceiling Test Write Down Net Of Tax NonCashCeilingTestWriteDownNetOfTax	1000000000	USD
CY2016	unt	Non Cash Ceiling Test Write Down Net Of Tax NonCashCeilingTestWriteDownNetOfTax	100600000	USD
CY2016	unt	Number Of Oil And Gas Limited Partnerships NumberOfOilAndGasLimitedPartnerships	13	Unit
CY2016	unt	Number Of Oil And Gas Limited Partnerships For Employee Investment NumberOfOilAndGasLimitedPartnershipsForEmployeeInvestment	13	Unit
CY2016	unt	Numberof Contracts Daywork NumberofContractsDaywork	8	contract
CY2016	unt	Numberof Contracts Daywork Expiringin Next Fiscal Year NumberofContractsDayworkExpiringinNextFiscalYear	7	contract
CY2016	unt	Numberof Contracts Daywork Expiringin Two Years NumberofContractsDayworkExpiringinTwoYears	1	contract
CY2016	unt	Numberofcompressorsundercapitalleaseagreement Numberofcompressorsundercapitalleaseagreement	20
CY2014	unt	Numberofgasgatheringsystemsimpaired Numberofgasgatheringsystemsimpaired	3	systems
CY2015	unt	Numberofgasgatheringsystemsimpaired Numberofgasgatheringsystemsimpaired	3	systems
CY2014	unt	Oil And Gas Properties Average Depreciation Depletion And Amortization Rate OilAndGasPropertiesAverageDepreciationDepletionAndAmortizationRate	14.82	USD
CY2015	unt	Oil And Gas Properties Average Depreciation Depletion And Amortization Rate OilAndGasPropertiesAverageDepreciationDepletionAndAmortizationRate	12.30	USD
CY2016	unt	Oil And Gas Properties Average Depreciation Depletion And Amortization Rate OilAndGasPropertiesAverageDepreciationDepletionAndAmortizationRate	6.24	USD
CY2016	unt	Oil And Gas Property Full Cost Method Discount Percentage OilAndGasPropertyFullCostMethodDiscountPercentage	0.10
CY2014Q4	unt	Oil And Natural Gas Identifiable Assets OilAndNaturalGasIdentifiableAssets	2856833000	USD
CY2015Q4	unt	Oil And Natural Gas Identifiable Assets OilAndNaturalGasIdentifiableAssets	1218036000	USD
CY2016Q4	unt	Oil And Natural Gas Identifiable Assets OilAndNaturalGasIdentifiableAssets	965159000	USD
CY2014	unt	Partnershipsdissolved Partnershipsdissolved	1	Partnerships
CY2015	unt	Partnershipsdissolved Partnershipsdissolved	0	Partnerships
CY2016	unt	Partnershipsdissolved Partnershipsdissolved	2	Partnerships
CY2015	unt	Paymentsforproceedsfromderivativeinstrumentoperatingactivities Paymentsforproceedsfromderivativeinstrumentoperatingactivities	46615000	USD
CY2016	unt	Paymentsforproceedsfromderivativeinstrumentoperatingactivities Paymentsforproceedsfromderivativeinstrumentoperatingactivities	9658000	USD
CY2014	unt	Percentage Of Annual Discount For Estimated Timing Of Cash Flows PercentageOfAnnualDiscountForEstimatedTimingOfCashFlows	0.10
CY2015	unt	Percentage Of Annual Discount For Estimated Timing Of Cash Flows PercentageOfAnnualDiscountForEstimatedTimingOfCashFlows	0.10
CY2016	unt	Percentage Of Annual Discount For Estimated Timing Of Cash Flows PercentageOfAnnualDiscountForEstimatedTimingOfCashFlows	0.10
CY2016	unt	Percentage Of Repurchase Of Limited Units Outstanding PercentageOfRepurchaseOfLimitedUnitsOutstanding	0.20
CY2016	unt	Percentagefairvalueexceedscarryingvalueforgoodwill Percentagefairvalueexceedscarryingvalueforgoodwill	0.16
CY2014	unt	Proved Developed And Undeveloped Reserves Infill Reserves In Existing Proved Fields Energy ProvedDevelopedAndUndevelopedReservesInfillReservesInExistingProvedFieldsEnergy	14217000	MBoe
CY2015	unt	Proved Developed And Undeveloped Reserves Infill Reserves In Existing Proved Fields Energy ProvedDevelopedAndUndevelopedReservesInfillReservesInExistingProvedFieldsEnergy	6304000	MBoe
CY2016	unt	Proved Developed And Undeveloped Reserves Infill Reserves In Existing Proved Fields Energy ProvedDevelopedAndUndevelopedReservesInfillReservesInExistingProvedFieldsEnergy	7504000	MBoe
CY2014	unt	Repurchase Of Limited Units Outstanding Amount RepurchaseOfLimitedUnitsOutstandingAmount	45000	USD
CY2015	unt	Repurchase Of Limited Units Outstanding Amount RepurchaseOfLimitedUnitsOutstandingAmount	118000	USD
CY2016	unt	Repurchase Of Limited Units Outstanding Amount RepurchaseOfLimitedUnitsOutstandingAmount	5000	USD
CY2014	unt	Revenuesfromtransactionswithoperatingsegmentsofsameentity Revenuesfromtransactionswithoperatingsegmentsofsameentity	89500000	USD
CY2015	unt	Revenuesfromtransactionswithoperatingsegmentsofsameentity Revenuesfromtransactionswithoperatingsegmentsofsameentity	22100000	USD
CY2016	unt	Revenuesfromtransactionswithoperatingsegmentsofsameentity Revenuesfromtransactionswithoperatingsegmentsofsameentity	0	USD
CY2015Q4	unt	Saltwaterdisposalsystems Saltwaterdisposalsystems	60316000	USD
CY2016Q4	unt	Saltwaterdisposalsystems Saltwaterdisposalsystems	60638000	USD
CY2016	unt	Senior Notes Repurchase Price In Percentage SeniorNotesRepurchasePriceInPercentage	1.01
CY2015Q4	unt	Thirdpartycredits Thirdpartycredits	3326000	USD
CY2016Q4	unt	Thirdpartycredits Thirdpartycredits	2998000	USD
CY2014	unt	Total Capital Expenditures TotalCapitalExpenditures	1013280000	USD
CY2015	unt	Total Capital Expenditures TotalCapitalExpenditures	454287000	USD
CY2016	unt	Total Capital Expenditures TotalCapitalExpenditures	142155000	USD
CY2015	unt	Total Gains Losses For Period Included In Earnings Attributable To Change In Gain Loss Relating To Assets TotalGainsLossesForPeriodIncludedInEarningsAttributableToChangeInGainLossRelatingToAssets	5739000	USD
CY2016	unt	Total Gains Losses For Period Included In Earnings Attributable To Change In Gain Loss Relating To Assets TotalGainsLossesForPeriodIncludedInEarningsAttributableToChangeInGainLossRelatingToAssets	-16216000	USD
CY2014Q4	unt	Total Identifiable Assets TotalIdentifiableAssets	4417068000	USD
CY2015Q4	unt	Total Identifiable Assets TotalIdentifiableAssets	2689712000	USD
CY2016Q4	unt	Total Identifiable Assets TotalIdentifiableAssets	2368435000	USD
CY2016Q4	unt	Transfersbetween Level2and Level3assetsliabilities TransfersbetweenLevel2andLevel3assetsliabilities	0	USD
CY2014	unt	Well Supervision And Other Fees WellSupervisionAndOtherFees	435000	USD
CY2015	unt	Well Supervision And Other Fees WellSupervisionAndOtherFees	423000	USD
CY2016	unt	Well Supervision And Other Fees WellSupervisionAndOtherFees	254000	USD
CY2015Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	87413000	USD
CY2016Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	88793000	USD
CY2015Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	79941000	USD
CY2016Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	83954000	USD
CY2014	us-gaap	Accretion Expense AccretionExpense	4599000	USD
CY2015	us-gaap	Accretion Expense AccretionExpense	3453000	USD
CY2016	us-gaap	Accretion Expense AccretionExpense	2779000	USD
CY2015Q4	us-gaap	Accrued Employee Benefits Current AccruedEmployeeBenefitsCurrent	12641000	USD
CY2016Q4	us-gaap	Accrued Employee Benefits Current AccruedEmployeeBenefitsCurrent	15394000	USD
CY2015Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	46918000	USD
CY2016Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	39651000	USD
CY2015Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	5609980000	USD
CY2016Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	5952330000	USD
CY2015Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	486571000	USD
CY2016Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	502500000	USD
CY2014	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	17400000	USD
CY2015	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	15300000	USD
CY2016	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	9600000	USD
CY2015Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	5199000	USD
CY2016Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	3773000	USD
CY2014	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	2055000	USD
CY2015	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	2088000	USD
CY2016	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	2122000	USD
CY2014Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	100567000	USD
CY2015Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	98297000	USD
CY2016Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	70170000	USD
CY2015	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	3453000	USD
CY2016	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	2779000	USD
CY2015Q4	us-gaap	Asset Retirement Obligation Current AssetRetirementObligationCurrent	3965000	USD
CY2016Q4	us-gaap	Asset Retirement Obligation Current AssetRetirementObligationCurrent	2906000	USD
CY2015	us-gaap	Asset Retirement Obligation Liabilities Incurred AssetRetirementObligationLiabilitiesIncurred	6754000	USD
CY2016	us-gaap	Asset Retirement Obligation Liabilities Incurred AssetRetirementObligationLiabilitiesIncurred	584000	USD
CY2015	us-gaap	Asset Retirement Obligation Liabilities Settled AssetRetirementObligationLiabilitiesSettled	2893000	USD
CY2016	us-gaap	Asset Retirement Obligation Liabilities Settled AssetRetirementObligationLiabilitiesSettled	1215000	USD
CY2015	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	9163000	USD
CY2016	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	19393000	USD
CY2015Q4	us-gaap	Asset Retirement Obligations Noncurrent AssetRetirementObligationsNoncurrent	94332000	USD
CY2016Q4	us-gaap	Asset Retirement Obligations Noncurrent AssetRetirementObligationsNoncurrent	67264000	USD
CY2014Q4	us-gaap	Assets Assets	4463472000	USD
CY2015Q4	us-gaap	Assets Assets	2799842000	USD
CY2016Q4	us-gaap	Assets Assets	2479303000	USD
CY2015Q4	us-gaap	Capitalized Costs Oil And Gas Producing Activities Gross CapitalizedCostsOilAndGasProducingActivitiesGross	5738717000	USD
CY2016Q4	us-gaap	Capitalized Costs Oil And Gas Producing Activities Gross CapitalizedCostsOilAndGasProducingActivitiesGross	5761172000	USD
CY2014Q4	us-gaap	Capitalized Costs Oil And Gas Producing Activities Net CapitalizedCostsOilAndGasProducingActivitiesNet	2689643000	USD
CY2015Q4	us-gaap	Assets Current AssetsCurrent	140258000	USD
CY2016Q4	us-gaap	Assets Current AssetsCurrent	121196000	USD
CY2015Q4	us-gaap	Assets Held For Sale Not Part Of Disposal Group AssetsHeldForSaleNotPartOfDisposalGroup	615000	USD
CY2016Q4	us-gaap	Assets Held For Sale Not Part Of Disposal Group AssetsHeldForSaleNotPartOfDisposalGroup	0	USD
CY2015Q4	us-gaap	Bank Overdrafts BankOverdrafts	22100000	USD
CY2016Q4	us-gaap	Bank Overdrafts BankOverdrafts	17300000	USD
CY2016Q4	us-gaap	Business Acquisition Purchase Price Allocation Goodwill Expected Tax Deductible Amount BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount	1300000	USD
CY2015Q4	us-gaap	Capital Lease Obligations CapitalLeaseObligations	22466000	USD
CY2016Q4	us-gaap	Capital Lease Obligations CapitalLeaseObligations	18918000	USD
CY2016Q4	us-gaap	Capital Lease Obligations Current CapitalLeaseObligationsCurrent	3700000	USD
CY2016Q4	us-gaap	Capital Lease Obligations Noncurrent CapitalLeaseObligationsNoncurrent	15200000	USD
CY2016Q4	us-gaap	Capital Leases Future Minimum Payments Due CapitalLeasesFutureMinimumPaymentsDue	28441000	USD
CY2016Q4	us-gaap	Capital Leases Future Minimum Payments Due Current CapitalLeasesFutureMinimumPaymentsDueCurrent	6168000	USD
CY2016Q4	us-gaap	Capital Leases Future Minimum Payments Due In Five Years CapitalLeasesFutureMinimumPaymentsDueInFiveYears	3769000	USD
CY2016Q4	us-gaap	Capital Leases Future Minimum Payments Due In Four Years CapitalLeasesFutureMinimumPaymentsDueInFourYears	6168000	USD
CY2016Q4	us-gaap	Capital Leases Future Minimum Payments Due In Three Years CapitalLeasesFutureMinimumPaymentsDueInThreeYears	6168000	USD
CY2016Q4	us-gaap	Capital Leases Future Minimum Payments Due In Two Years CapitalLeasesFutureMinimumPaymentsDueInTwoYears	6168000	USD
CY2016Q4	us-gaap	Capital Leases Future Minimum Payments Executory Costs CapitalLeasesFutureMinimumPaymentsExecutoryCosts	7659000	USD
CY2016Q4	us-gaap	Capital Leases Future Minimum Payments Interest Included In Payments CapitalLeasesFutureMinimumPaymentsInterestIncludedInPayments	1864000	USD
CY2014Q4	us-gaap	Capitalized Costs Accumulated Depreciation Depletion Amortization And Valuation Allowance For Relating To Oil And Gas Producing Activities CapitalizedCostsAccumulatedDepreciationDepletionAmortizationAndValuationAllowanceForRelatingToOilAndGasProducingActivities	2786678000	USD
CY2015Q4	us-gaap	Capitalized Costs Accumulated Depreciation Depletion Amortization And Valuation Allowance For Relating To Oil And Gas Producing Activities CapitalizedCostsAccumulatedDepreciationDepletionAmortizationAndValuationAllowanceForRelatingToOilAndGasProducingActivities	4631404000	USD
CY2016Q4	us-gaap	Capitalized Costs Accumulated Depreciation Depletion Amortization And Valuation Allowance For Relating To Oil And Gas Producing Activities CapitalizedCostsAccumulatedDepreciationDepletionAmortizationAndValuationAllowanceForRelatingToOilAndGasProducingActivities	4900304000	USD
CY2014Q4	us-gaap	Capitalized Costs Of Unproved Properties Excluded From Amortization Cumulative CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationCumulative	485568000	USD
CY2015Q4	us-gaap	Capitalized Costs Of Unproved Properties Excluded From Amortization Cumulative CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationCumulative	337099000	USD
CY2016Q4	us-gaap	Capitalized Costs Of Unproved Properties Excluded From Amortization Cumulative CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationCumulative	314867000	USD
CY2014Q4	us-gaap	Capitalized Costs Oil And Gas Producing Activities Gross CapitalizedCostsOilAndGasProducingActivitiesGross	5476321000	USD
CY2015Q4	us-gaap	Capitalized Costs Oil And Gas Producing Activities Net CapitalizedCostsOilAndGasProducingActivitiesNet	1107313000	USD
CY2016Q4	us-gaap	Capitalized Costs Oil And Gas Producing Activities Net CapitalizedCostsOilAndGasProducingActivitiesNet	860868000	USD
CY2014Q4	us-gaap	Capitalized Costs Proved Properties CapitalizedCostsProvedProperties	4990753000	USD
CY2015Q4	us-gaap	Capitalized Costs Proved Properties CapitalizedCostsProvedProperties	5401618000	USD
CY2016Q4	us-gaap	Capitalized Costs Proved Properties CapitalizedCostsProvedProperties	5446305000	USD
CY2015Q4	us-gaap	Capitalized Costs Support Equipment And Facilities CapitalizedCostsSupportEquipmentAndFacilities	1567560000	USD
CY2016Q4	us-gaap	Capitalized Costs Support Equipment And Facilities CapitalizedCostsSupportEquipmentAndFacilities	1565268000	USD
CY2014Q4	us-gaap	Capitalized Costs Wells And Related Equipment And Facilities CapitalizedCostsWellsAndRelatedEquipmentAndFacilities	23700000	USD
CY2015Q4	us-gaap	Capitalized Costs Wells And Related Equipment And Facilities CapitalizedCostsWellsAndRelatedEquipmentAndFacilities	19200000	USD
CY2016Q4	us-gaap	Capitalized Costs Wells And Related Equipment And Facilities CapitalizedCostsWellsAndRelatedEquipmentAndFacilities	15400000	USD
CY2013Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	18593000	USD
CY2015	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	-4000	USD
CY2016	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	15000	USD
CY2015Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	931000000	USD
CY2016Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	810800000	USD
CY2015Q4	us-gaap	Debt Instrument Face Amount DebtInstrumentFaceAmount	650000000	USD
CY2016Q4	us-gaap	Debt Instrument Face Amount DebtInstrumentFaceAmount	650000000	USD
CY2016Q4	us-gaap	Debt Instrument Face Amount DebtInstrumentFaceAmount	650000000	USD
CY2016Q4	us-gaap	Debt Instrument Interest Rate Stated Percentage DebtInstrumentInterestRateStatedPercentage	0.06625
CY2015	us-gaap	Costs Incurred Acquisition Of Unproved Oil And Gas Properties CostsIncurredAcquisitionOfUnprovedOilAndGasProperties	41777000	USD
CY2016	us-gaap	Costs Incurred Acquisition Of Unproved Oil And Gas Properties CostsIncurredAcquisitionOfUnprovedOilAndGasProperties	21675000	USD
CY2014Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	1049000	USD
CY2015Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	835000	USD
CY2016Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	893000	USD
CY2014	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-17544000	USD
CY2015	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-214000	USD
CY2016	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	58000	USD
CY2016Q4	us-gaap	Collateral Already Posted Aggregate Fair Value CollateralAlreadyPostedAggregateFairValue	0	USD
CY2015Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies	0	USD
CY2016Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies	0	USD
CY2015Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.2
CY2016Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.2
CY2015Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	175000000	shares
CY2016Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	175000000	shares
CY2015Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	50413101	shares
CY2016Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	51494318	shares
CY2015Q4	us-gaap	Common Stock Value CommonStockValue	9831000	USD
CY2016Q4	us-gaap	Common Stock Value CommonStockValue	10016000	USD
CY2014	us-gaap	Cost Of Services Oil And Gas CostOfServicesOilAndGas	274933000	USD
CY2015	us-gaap	Cost Of Services Oil And Gas CostOfServicesOilAndGas	156408000	USD
CY2016	us-gaap	Cost Of Services Oil And Gas CostOfServicesOilAndGas	88154000	USD
CY2014	us-gaap	Costs And Expenses CostsAndExpenses	1362711000	USD
CY2015	us-gaap	Costs And Expenses CostsAndExpenses	2512967000	USD
CY2016	us-gaap	Costs And Expenses CostsAndExpenses	746660000	USD
CY2014	us-gaap	Costs Incurred Acquisition Of Oil And Gas Properties With Proved Reserves CostsIncurredAcquisitionOfOilAndGasPropertiesWithProvedReserves	5723000	USD
CY2015	us-gaap	Costs Incurred Acquisition Of Oil And Gas Properties With Proved Reserves CostsIncurredAcquisitionOfOilAndGasPropertiesWithProvedReserves	179000	USD
CY2016	us-gaap	Costs Incurred Acquisition Of Oil And Gas Properties With Proved Reserves CostsIncurredAcquisitionOfOilAndGasPropertiesWithProvedReserves	564000	USD
CY2014	us-gaap	Costs Incurred Acquisition Of Unproved Oil And Gas Properties CostsIncurredAcquisitionOfUnprovedOilAndGasProperties	76041000	USD
CY2014	us-gaap	Costs Incurred Development Costs CostsIncurredDevelopmentCosts	615252000	USD
CY2015	us-gaap	Costs Incurred Development Costs CostsIncurredDevelopmentCosts	208845000	USD
CY2016	us-gaap	Costs Incurred Development Costs CostsIncurredDevelopmentCosts	80582000	USD
CY2014	us-gaap	Costs Incurred Exploration Costs CostsIncurredExplorationCosts	68811000	USD
CY2015	us-gaap	Costs Incurred Exploration Costs CostsIncurredExplorationCosts	19222000	USD
CY2016	us-gaap	Costs Incurred Exploration Costs CostsIncurredExplorationCosts	17325000	USD
CY2014	us-gaap	Costs Incurred Oil And Gas Property Acquisition Exploration And Development Activities CostsIncurredOilAndGasPropertyAcquisitionExplorationAndDevelopmentActivities	728140000	USD
CY2015	us-gaap	Costs Incurred Oil And Gas Property Acquisition Exploration And Development Activities CostsIncurredOilAndGasPropertyAcquisitionExplorationAndDevelopmentActivities	264330000	USD
CY2016	us-gaap	Costs Incurred Oil And Gas Property Acquisition Exploration And Development Activities CostsIncurredOilAndGasPropertyAcquisitionExplorationAndDevelopmentActivities	89240000	USD
CY2014	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	8594000	USD
CY2015	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-20612000	USD
CY2016	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	0	USD
CY2014	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	9378000	USD
CY2015	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	-20616000	USD
CY2016	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	15000	USD
CY2014	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	784000	USD
CY2016	us-gaap	Debt Instrument Interest Rate Terms DebtInstrumentInterestRateTerms	LIBOR plus 1.00%
CY2016	us-gaap	Debt Instrument Maturity Date DebtInstrumentMaturityDate	2021-05-15
CY2016Q4	us-gaap	Debt Instrument Unamortized Discount DebtInstrumentUnamortizedDiscount	2800000	USD
CY2016Q4	us-gaap	Debt Instrument Unamortized Discount DebtInstrumentUnamortizedDiscount	2804000	USD
CY2014	us-gaap	Decrease Due To Sales Of Minerals In Place DecreaseDueToSalesOfMineralsInPlace	19135000	USD
CY2015	us-gaap	Decrease Due To Sales Of Minerals In Place DecreaseDueToSalesOfMineralsInPlace	3338000	USD
CY2015Q4	us-gaap	Debt Instrument Unamortized Discount DebtInstrumentUnamortizedDiscount	3338000	USD
CY2015Q4	us-gaap	Debt Instrument Unamortized Discount DebtInstrumentUnamortizedDiscount	3300000	USD
CY2015Q4	us-gaap	Deferred Compensation Liability Current And Noncurrent DeferredCompensationLiabilityCurrentAndNoncurrent	4244000	USD
CY2016Q4	us-gaap	Deferred Compensation Liability Current And Noncurrent DeferredCompensationLiabilityCurrentAndNoncurrent	4578000	USD
CY2014	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	68360000	USD
CY2016	us-gaap	Decrease Due To Sales Of Minerals In Place DecreaseDueToSalesOfMineralsInPlace	17248000	USD
CY2015	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-535691000	USD
CY2016	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-62923000	USD
CY2015Q4	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	8667000	USD
CY2016Q4	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	7079000	USD
CY2014	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	77285000	USD
CY2015	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-606332000	USD
CY2016	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-71209000	USD
CY2014	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	8925000	USD
CY2015	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-70641000	USD
CY2016	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-8286000	USD
CY2015Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	202751000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	249979000	USD
CY2015Q4	us-gaap	Deferred Tax Assets Net Current DeferredTaxAssetsNetCurrent	14206000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Net Current DeferredTaxAssetsNetCurrent	25211000	USD
CY2015Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	140863000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	190603000	USD
CY2015Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards Alternative Minimum Tax DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTax	5409000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards Alternative Minimum Tax DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTax	5409000	USD
CY2015Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	261544000	USD
CY2016Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	190711000	USD
CY2015Q4	us-gaap	Deferred Tax Liabilities Noncurrent DeferredTaxLiabilitiesNoncurrent	275750000	USD
CY2016Q4	us-gaap	Deferred Tax Liabilities Noncurrent DeferredTaxLiabilitiesNoncurrent	215922000	USD
CY2014	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	402888000	USD
CY2015	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	352742000	USD
CY2016	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	208353000	USD
CY2015Q4	us-gaap	Derivative Assets DerivativeAssets	11154000	USD
CY2016Q4	us-gaap	Derivative Assets DerivativeAssets	377000	USD
CY2015Q4	us-gaap	Derivative Assets Current DerivativeAssetsCurrent	10186000	USD
CY2016Q4	us-gaap	Derivative Assets Current DerivativeAssetsCurrent	0	USD
CY2016Q4	us-gaap	Derivative Assets Liabilities At Fair Value Net DerivativeAssetsLiabilitiesAtFairValueNet	-21600000	USD
CY2015Q4	us-gaap	Derivative Assets Noncurrent DerivativeAssetsNoncurrent	968000	USD
CY2016Q4	us-gaap	Derivative Assets Noncurrent DerivativeAssetsNoncurrent	377000	USD
CY2014	us-gaap	Derivative Cash Received On Hedge DerivativeCashReceivedOnHedge	6038000	USD
CY2015	us-gaap	Derivative Cash Received On Hedge DerivativeCashReceivedOnHedge	-46615000	USD
CY2016	us-gaap	Derivative Cash Received On Hedge DerivativeCashReceivedOnHedge	-9658000	USD
CY2015	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	26345000	USD
CY2016	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	-22813000	USD
CY2014	us-gaap	Derivative Instruments Not Designated As Hedging Instruments Gain Loss Net DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet	30147000	USD
CY2015	us-gaap	Derivative Instruments Not Designated As Hedging Instruments Gain Loss Net DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet	26345000	USD
CY2016	us-gaap	Derivative Instruments Not Designated As Hedging Instruments Gain Loss Net DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet	-22813000	USD
CY2015Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	285000	USD
CY2016Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	21979000	USD
CY2015Q4	us-gaap	Derivative Liabilities Current DerivativeLiabilitiesCurrent	0	USD
CY2016Q4	us-gaap	Derivative Liabilities Current DerivativeLiabilitiesCurrent	21564000	USD
CY2015Q4	us-gaap	Derivative Liabilities Noncurrent DerivativeLiabilitiesNoncurrent	285000	USD
CY2016Q4	us-gaap	Derivative Liabilities Noncurrent DerivativeLiabilitiesNoncurrent	415000	USD
CY2014	us-gaap	Dilutive Securities DilutiveSecurities	0	USD
CY2015	us-gaap	Dilutive Securities DilutiveSecurities	0	USD
CY2016	us-gaap	Dilutive Securities DilutiveSecurities	0	USD
CY2014	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.80
CY2015Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-5.07
CY2015Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-5.58
CY2015Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-4.18
CY2015Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-6.29
CY2015	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-21.12
CY2016Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.83
CY2016Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-1.44
CY2016Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.48
CY2016Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.03
CY2016	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-2.71
CY2014	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.78
CY2015Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-5.07
CY2015Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-5.58
CY2015Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-4.18
CY2015Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-6.29
CY2015	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-21.12
CY2016Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.83
CY2016Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-1.44
CY2016Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.48
CY2016Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.03
CY2016	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-2.71
CY2014	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	3700000	USD
CY2015	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	3500000	USD
CY2016	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	2100000	USD
CY2016Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	6500000	USD
CY2016	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1	P0Y8M12D
CY2014	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	6700000	USD
CY2015	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	5800000	USD
CY2016	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	3600000	USD
CY2014	us-gaap	Excess Tax Benefit From Share Based Compensation Financing Activities ExcessTaxBenefitFromShareBasedCompensationFinancingActivities	1614000	USD
CY2015	us-gaap	Excess Tax Benefit From Share Based Compensation Financing Activities ExcessTaxBenefitFromShareBasedCompensationFinancingActivities	-3207000	USD
CY2016	us-gaap	Excess Tax Benefit From Share Based Compensation Financing Activities ExcessTaxBenefitFromShareBasedCompensationFinancingActivities	-376000	USD
CY2014	us-gaap	Extensions Discoveries Additions And Improved Recovery Less Related Costs ExtensionsDiscoveriesAdditionsAndImprovedRecoveryLessRelatedCosts	635752000	USD
CY2015	us-gaap	Extensions Discoveries Additions And Improved Recovery Less Related Costs ExtensionsDiscoveriesAdditionsAndImprovedRecoveryLessRelatedCosts	95671000	USD
CY2016	us-gaap	Extensions Discoveries Additions And Improved Recovery Less Related Costs ExtensionsDiscoveriesAdditionsAndImprovedRecoveryLessRelatedCosts	84738000	USD
CY2015Q4	us-gaap	Fair Value Concentration Of Risk Cash And Cash Equivalents FairValueConcentrationOfRiskCashAndCashEquivalents	2300000	USD
CY2016Q4	us-gaap	Fair Value Concentration Of Risk Cash And Cash Equivalents FairValueConcentrationOfRiskCashAndCashEquivalents	8300000	USD
CY2015	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Gain Loss Included In Earnings1 FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1	15260000	USD
CY2016	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Gain Loss Included In Earnings1 FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1	-9042000	USD
CY2015	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Purchases Sales Issuances Settlements FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchasesSalesIssuancesSettlements	-9521000	USD
CY2015Q4	us-gaap	Gas Imbalance Asset Liability GasImbalanceAssetLiability	-5047000	USD
CY2016	us-gaap	Gas Gathering Transportation Marketing And Processing Revenue GasGatheringTransportationMarketingAndProcessingRevenue	185870000	USD
CY2016	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Purchases Sales Issuances Settlements FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchasesSalesIssuancesSettlements	-7174000	USD
CY2014Q4	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis With Unobservable Inputs FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisWithUnobservableInputs	3355000	USD
CY2015Q4	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis With Unobservable Inputs FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisWithUnobservableInputs	9094000	USD
CY2016Q4	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis With Unobservable Inputs FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisWithUnobservableInputs	-7122000	USD
CY2014Q4	us-gaap	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Cash Inflows FutureNetCashFlowsRelatingToProvedOilAndGasReservesCashInflows	6398236000	USD
CY2015Q4	us-gaap	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Cash Inflows FutureNetCashFlowsRelatingToProvedOilAndGasReservesCashInflows	2475898000	USD
CY2016Q4	us-gaap	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Cash Inflows FutureNetCashFlowsRelatingToProvedOilAndGasReservesCashInflows	2030925000	USD
CY2014Q4	us-gaap	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Development Costs FutureNetCashFlowsRelatingToProvedOilAndGasReservesDevelopmentCosts	560102000	USD
CY2015Q4	us-gaap	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Development Costs FutureNetCashFlowsRelatingToProvedOilAndGasReservesDevelopmentCosts	228445000	USD
CY2016Q4	us-gaap	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Development Costs FutureNetCashFlowsRelatingToProvedOilAndGasReservesDevelopmentCosts	173446000	USD
CY2014Q4	us-gaap	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Income Tax Expense FutureNetCashFlowsRelatingToProvedOilAndGasReservesIncomeTaxExpense	1228533000	USD
CY2015Q4	us-gaap	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Income Tax Expense FutureNetCashFlowsRelatingToProvedOilAndGasReservesIncomeTaxExpense	230544000	USD
CY2016Q4	us-gaap	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Income Tax Expense FutureNetCashFlowsRelatingToProvedOilAndGasReservesIncomeTaxExpense	141752000	USD
CY2014Q4	us-gaap	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Net Cash Flows FutureNetCashFlowsRelatingToProvedOilAndGasReservesNetCashFlows	2539965000	USD
CY2015Q4	us-gaap	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Net Cash Flows FutureNetCashFlowsRelatingToProvedOilAndGasReservesNetCashFlows	999132000	USD
CY2016Q4	us-gaap	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Net Cash Flows FutureNetCashFlowsRelatingToProvedOilAndGasReservesNetCashFlows	854102000	USD
CY2014Q4	us-gaap	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Production Costs FutureNetCashFlowsRelatingToProvedOilAndGasReservesProductionCosts	2069636000	USD
CY2015Q4	us-gaap	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Production Costs FutureNetCashFlowsRelatingToProvedOilAndGasReservesProductionCosts	1017777000	USD
CY2016Q4	us-gaap	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Production Costs FutureNetCashFlowsRelatingToProvedOilAndGasReservesProductionCosts	861625000	USD
CY2014Q4	us-gaap	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Ten Percent Annual Discount For Estimated Timing Of Cash Flows FutureNetCashFlowsRelatingToProvedOilAndGasReservesTenPercentAnnualDiscountForEstimatedTimingOfCashFlows	1104221000	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	409646000	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	335892000	USD
CY2014	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	8953000	USD
CY2015	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	-7229000	USD
CY2016	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	2540000	USD
CY2014	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	8953000	USD
CY2015	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	-7229000	USD
CY2016	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	2540000	USD
CY2014	us-gaap	Gains Losses On Sales Of Assets GainsLossesOnSalesOfAssets	8953000	USD
CY2015	us-gaap	Gains Losses On Sales Of Assets GainsLossesOnSalesOfAssets	-7229000	USD
CY2016	us-gaap	Gains Losses On Sales Of Assets GainsLossesOnSalesOfAssets	3127000	USD
CY2014	us-gaap	Gas Gathering Transportation Marketing And Processing Costs GasGatheringTransportationMarketingAndProcessingCosts	306831000	USD
CY2015	us-gaap	Gas Gathering Transportation Marketing And Processing Costs GasGatheringTransportationMarketingAndProcessingCosts	161556000	USD
CY2016	us-gaap	Gas Gathering Transportation Marketing And Processing Costs GasGatheringTransportationMarketingAndProcessingCosts	137609000	USD
CY2014	us-gaap	Gas Gathering Transportation Marketing And Processing Revenue GasGatheringTransportationMarketingAndProcessingRevenue	356348000	USD
CY2015	us-gaap	Gas Gathering Transportation Marketing And Processing Revenue GasGatheringTransportationMarketingAndProcessingRevenue	202789000	USD
CY2016Q4	us-gaap	Gas Imbalance Asset Liability GasImbalanceAssetLiability	-3789000	USD
CY2014	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	41027000	USD
CY2015	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	34358000	USD
CY2016	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	33337000	USD
CY2015Q4	us-gaap	Goodwill Goodwill	62808000	USD
CY2016Q4	us-gaap	Goodwill Goodwill	62808000	USD
CY2015	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-105426000	USD
CY2016	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	11796000	USD
CY2016	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	-5687000	USD
CY2014	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	15898000	USD
CY2015	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	3540000	USD
CY2016	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	5465000	USD
CY2014	us-gaap	Increase Decrease In Estimated Future Development Costs IncreaseDecreaseInEstimatedFutureDevelopmentCosts	96339000	USD
CY2015	us-gaap	Increase Decrease In Estimated Future Development Costs IncreaseDecreaseInEstimatedFutureDevelopmentCosts	227857000	USD
CY2016	us-gaap	Increase Decrease In Estimated Future Development Costs IncreaseDecreaseInEstimatedFutureDevelopmentCosts	70976000	USD
CY2014	us-gaap	Increase Decrease In Future Income Tax Expense Estimates On Future Cash Flows Related To Proved Oil And Gas Reserves IncreaseDecreaseInFutureIncomeTaxExpenseEstimatesOnFutureCashFlowsRelatedToProvedOilAndGasReserves	-98119000	USD
CY2014	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	6131000	USD
CY2015	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	-45768000	USD
CY2016	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	42000	USD
CY2015Q4	us-gaap	Income Taxes Receivable IncomeTaxesReceivable	21002000	USD
CY2016Q4	us-gaap	Income Taxes Receivable IncomeTaxesReceivable	99000	USD
CY2014	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	4715000	USD
CY2015	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-20306000	USD
CY2016	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	27400000	USD
CY2014	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	60800000	USD
CY2016	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	0	USD
CY2016	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2015Q1	us-gaap	Gross Profit GrossProfit	-389699000	USD
CY2015Q2	us-gaap	Gross Profit GrossProfit	-419916000	USD
CY2015Q3	us-gaap	Gross Profit GrossProfit	-314657000	USD
CY2015Q4	us-gaap	Gross Profit GrossProfit	-492877000	USD
CY2016Q1	us-gaap	Gross Profit GrossProfit	-49871000	USD
CY2016Q2	us-gaap	Gross Profit GrossProfit	-74223000	USD
CY2016Q3	us-gaap	Gross Profit GrossProfit	-27365000	USD
CY2016Q4	us-gaap	Gross Profit GrossProfit	37773000	USD
CY2014	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	210233000	USD
CY2015	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	-1658736000	USD
CY2016	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	-144483000	USD
CY2014	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	222939000	USD
CY2015	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	-1664309000	USD
CY2016	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	-206818000	USD
CY2014	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	86663000	USD
CY2015	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-626948000	USD
CY2016	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-71194000	USD
CY2014	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	78029000	USD
CY2015	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	-582508000	USD
CY2016	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	-72386000	USD
CY2014	us-gaap	Income Tax Reconciliation Nondeductible Expense Depletion IncomeTaxReconciliationNondeductibleExpenseDepletion	2503000	USD
CY2015	us-gaap	Income Tax Reconciliation Nondeductible Expense Depletion IncomeTaxReconciliationNondeductibleExpenseDepletion	1328000	USD
CY2016	us-gaap	Income Tax Reconciliation Nondeductible Expense Depletion IncomeTaxReconciliationNondeductibleExpenseDepletion	1414000	USD
CY2014	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	0	USD
CY2015	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	0	USD
CY2014	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	-1297000	USD
CY2015	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	-22920000	USD
CY2016	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	-4388000	USD
CY2016Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	800917000	USD
CY2015	us-gaap	Increase Decrease In Future Income Tax Expense Estimates On Future Cash Flows Related To Proved Oil And Gas Reserves IncreaseDecreaseInFutureIncomeTaxExpenseEstimatesOnFutureCashFlowsRelatedToProvedOilAndGasReserves	562838000	USD
CY2016	us-gaap	Increase Decrease In Future Income Tax Expense Estimates On Future Cash Flows Related To Proved Oil And Gas Reserves IncreaseDecreaseInFutureIncomeTaxExpenseEstimatesOnFutureCashFlowsRelatedToProvedOilAndGasReserves	44241000	USD
CY2014	us-gaap	Increase Decrease In Income Taxes Payable Net Of Income Taxes Receivable IncreaseDecreaseInIncomeTaxesPayableNetOfIncomeTaxesReceivable	-6994000	USD
CY2015	us-gaap	Increase Decrease In Income Taxes Payable Net Of Income Taxes Receivable IncreaseDecreaseInIncomeTaxesPayableNetOfIncomeTaxesReceivable	-21482000	USD
CY2016	us-gaap	Increase Decrease In Income Taxes Payable Net Of Income Taxes Receivable IncreaseDecreaseInIncomeTaxesPayableNetOfIncomeTaxesReceivable	20903000	USD
CY2014	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-2602000	USD
CY2015	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-1507000	USD
CY2016	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-225000	USD
CY2014	us-gaap	Increase Decrease In Other Accrued Liabilities IncreaseDecreaseInOtherAccruedLiabilities	-767000	USD
CY2015	us-gaap	Increase Decrease In Other Accrued Liabilities IncreaseDecreaseInOtherAccruedLiabilities	-274000	USD
CY2016	us-gaap	Increase Decrease In Other Accrued Liabilities IncreaseDecreaseInOtherAccruedLiabilities	-687000	USD
CY2014	us-gaap	Increase Decrease In Prepaid Expense IncreaseDecreaseInPrepaidExpense	-6550000	USD
CY2015	us-gaap	Increase Decrease In Prepaid Expense IncreaseDecreaseInPrepaidExpense	-7134000	USD
CY2016	us-gaap	Increase Decrease In Prepaid Expense IncreaseDecreaseInPrepaidExpense	-2585000	USD
CY2014	us-gaap	Increase Due To Purchases Of Minerals In Place IncreaseDueToPurchasesOfMineralsInPlace	8395000	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	2652000	USD
CY2014	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	32200000	USD
CY2015	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	21700000	USD
CY2016	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	15300000	USD
CY2014	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	-17371000	USD
CY2015	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	-31963000	USD
CY2016	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	-39829000	USD
CY2014	us-gaap	Interest Paid Net InterestPaidNet	13620000	USD
CY2015	us-gaap	Interest Paid Net InterestPaidNet	30910000	USD
CY2016	us-gaap	Interest Paid Net InterestPaidNet	35690000	USD
CY2015Q4	us-gaap	Interest Payable Current InterestPayableCurrent	6321000	USD
CY2016Q4	us-gaap	Interest Payable Current InterestPayableCurrent	6524000	USD
CY2015Q4	us-gaap	Inventory Raw Materials And Supplies InventoryRawMaterialsAndSupplies	3565000	USD
CY2016Q4	us-gaap	Inventory Raw Materials And Supplies InventoryRawMaterialsAndSupplies	3340000	USD
CY2015Q4	us-gaap	Land Land	49890000	USD
CY2016Q4	us-gaap	Land Land	59066000	USD
CY2016	us-gaap	Lease Expiration Date1 LeaseExpirationDate1	2021-12-31
CY2015Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	2799842000	USD
CY2016Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	2479303000	USD
CY2015Q4	us-gaap	Liabilities Current LiabilitiesCurrent	150891000	USD
CY2016Q4	us-gaap	Liabilities Current LiabilitiesCurrent	164915000	USD
CY2015Q4	us-gaap	Line Of Credit LineOfCredit	281000000	USD
CY2016Q4	us-gaap	Line Of Credit LineOfCredit	160800000	USD
CY2016	us-gaap	Line Of Credit Facility Commitment Fee Percentage LineOfCreditFacilityCommitmentFeePercentage	0.005
CY2015Q4	us-gaap	Line Of Credit Facility Interest Rate At Period End LineOfCreditFacilityInterestRateAtPeriodEnd	0.026
CY2016Q4	us-gaap	Line Of Credit Facility Interest Rate At Period End LineOfCreditFacilityInterestRateAtPeriodEnd	0.028
CY2016Q4	us-gaap	Line Of Credit Facility Maximum Borrowing Capacity LineOfCreditFacilityMaximumBorrowingCapacity	875000000	USD
CY2015Q4	us-gaap	Long Term Debt LongTermDebt	918995000	USD
CY2016Q4	us-gaap	Long Term Debt LongTermDebt	800917000	USD
CY2016Q4	us-gaap	Long Term Debt And Capital Lease Obligations Maturities Repayments Of Principal In Year Five LongTermDebtAndCapitalLeaseObligationsMaturitiesRepaymentsOfPrincipalInYearFive	655800000	USD
CY2016Q4	us-gaap	Long Term Debt And Capital Lease Obligations Maturities Repayments Of Principal In Year Four LongTermDebtAndCapitalLeaseObligationsMaturitiesRepaymentsOfPrincipalInYearFour	170000000	USD
CY2016Q4	us-gaap	Long Term Debt And Capital Lease Obligations Maturities Repayments Of Principal In Year Three LongTermDebtAndCapitalLeaseObligationsMaturitiesRepaymentsOfPrincipalInYearThree	47900000	USD
CY2016Q4	us-gaap	Long Term Debt And Capital Lease Obligations Maturities Repayments Of Principal In Year Two LongTermDebtAndCapitalLeaseObligationsMaturitiesRepaymentsOfPrincipalInYearTwo	5500000	USD
CY2015Q4	us-gaap	Machinery And Equipment Gross MachineryAndEquipmentGross	40072000	USD
CY2016Q4	us-gaap	Machinery And Equipment Gross MachineryAndEquipmentGross	32842000	USD
CY2014	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	194060000	USD
CY2015	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	102620000	USD
CY2016	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-129101000	USD
CY2016Q4	us-gaap	Long Term Debt And Capital Lease Obligations Repayments Of Principal In Next Twelve Months LongTermDebtAndCapitalLeaseObligationsRepaymentsOfPrincipalInNextTwelveMonths	14900000	USD
CY2016	us-gaap	Long Term Debt Maturities Repayment Terms LongTermDebtMaturitiesRepaymentTerms	4/10/2020
CY2015Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	918995000	USD
CY2014	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-920597000	USD
CY2015	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-549778000	USD
CY2016	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-110971000	USD
CY2014	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	708993000	USD
CY2015	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	446944000	USD
CY2016	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	240130000	USD
CY2014	us-gaap	Net Income Loss NetIncomeLoss	136276000	USD
CY2015Q1	us-gaap	Net Income Loss NetIncomeLoss	-248354000	USD
CY2015Q2	us-gaap	Net Income Loss NetIncomeLoss	-274389000	USD
CY2015Q3	us-gaap	Net Income Loss NetIncomeLoss	-205281000	USD
CY2015Q4	us-gaap	Net Income Loss NetIncomeLoss	-309337000	USD
CY2015	us-gaap	Net Income Loss NetIncomeLoss	-1037361000	USD
CY2016Q1	us-gaap	Net Income Loss NetIncomeLoss	-41149000	USD
CY2016Q2	us-gaap	Net Income Loss NetIncomeLoss	-72136000	USD
CY2016Q3	us-gaap	Net Income Loss NetIncomeLoss	-24022000	USD
CY2016Q4	us-gaap	Net Income Loss NetIncomeLoss	1683000	USD
CY2016	us-gaap	Net Income Loss NetIncomeLoss	-135624000	USD
CY2014	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	136276000	USD
CY2015	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	-1037361000	USD
CY2016	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	-135624000	USD
CY2014	us-gaap	Net Increase Decrease In Sales And Transfer Prices And Production Costs NetIncreaseDecreaseInSalesAndTransferPricesAndProductionCosts	-33259000	USD
CY2015	us-gaap	Net Increase Decrease In Sales And Transfer Prices And Production Costs NetIncreaseDecreaseInSalesAndTransferPricesAndProductionCosts	-1356333000	USD
CY2016	us-gaap	Net Increase Decrease In Sales And Transfer Prices And Production Costs NetIncreaseDecreaseInSalesAndTransferPricesAndProductionCosts	-94026000	USD
CY2014	us-gaap	Noncash Or Part Noncash Acquisition Value Of Assets Acquired1 NoncashOrPartNoncashAcquisitionValueOfAssetsAcquired1	-28202000	USD
CY2015	us-gaap	Noncash Or Part Noncash Acquisition Value Of Assets Acquired1 NoncashOrPartNoncashAcquisitionValueOfAssetsAcquired1	0	USD
CY2016	us-gaap	Noncash Or Part Noncash Acquisition Value Of Assets Acquired1 NoncashOrPartNoncashAcquisitionValueOfAssetsAcquired1	0	USD
CY2014	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	12706000	USD
CY2015	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-5573000	USD
CY2016	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-62335000	USD
CY2014	us-gaap	Oil And Gas Production Expense OilAndGasProductionExpense	187916000	USD
CY2015	us-gaap	Oil And Gas Production Expense OilAndGasProductionExpense	166046000	USD
CY2016	us-gaap	Oil And Gas Production Expense OilAndGasProductionExpense	120184000	USD
CY2014	us-gaap	Oil And Gas Revenue OilAndGasRevenue	740079000	USD
CY2015	us-gaap	Oil And Gas Revenue OilAndGasRevenue	385774000	USD
CY2016	us-gaap	Oil And Gas Revenue OilAndGasRevenue	294221000	USD
CY2014	us-gaap	Operating Costs And Expenses OperatingCostsAndExpenses	769680000	USD
CY2015	us-gaap	Operating Costs And Expenses OperatingCostsAndExpenses	484010000	USD
CY2016	us-gaap	Operating Costs And Expenses OperatingCostsAndExpenses	345947000	USD
CY2014	us-gaap	Operating Expenses OperatingExpenses	1330637000	USD
CY2015	us-gaap	Operating Expenses OperatingExpenses	2471380000	USD
CY2016	us-gaap	Operating Expenses OperatingExpenses	715863000	USD
CY2016Q4	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	72000	USD
CY2016Q4	us-gaap	Operating Leases Future Minimum Payments Receivable Current OperatingLeasesFutureMinimumPaymentsReceivableCurrent	3000000	USD
CY2016Q4	us-gaap	Operating Leases Future Minimum Payments Receivable In Three Years OperatingLeasesFutureMinimumPaymentsReceivableInThreeYears	100000	USD
CY2016Q4	us-gaap	Operating Leases Future Minimum Payments Receivable In Two Years OperatingLeasesFutureMinimumPaymentsReceivableInTwoYears	900000	USD
CY2014	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	13600000	USD
CY2015	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	12900000	USD
CY2016	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	11100000	USD
CY2016	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	564000	USD
CY2014	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	981374000	USD
CY2015Q4	us-gaap	Preferred Stock Value PreferredStockValue	0	USD
CY2016Q4	us-gaap	Operating Loss Carryforwards OperatingLossCarryforwards	485000000	USD
CY2015Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	3643000	USD
CY2016Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	2441000	USD
CY2014	us-gaap	Other Asset Impairment Charges OtherAssetImpairmentCharges	158069000	USD
CY2015	us-gaap	Other Asset Impairment Charges OtherAssetImpairmentCharges	1634628000	USD
CY2016	us-gaap	Other Asset Impairment Charges OtherAssetImpairmentCharges	161563000	USD
CY2015Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	14681000	USD
CY2016Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	13817000	USD
CY2015Q4	us-gaap	Other Employee Related Liabilities Current And Noncurrent OtherEmployeeRelatedLiabilitiesCurrentAndNoncurrent	9886000	USD
CY2016Q4	us-gaap	Other Employee Related Liabilities Current And Noncurrent OtherEmployeeRelatedLiabilitiesCurrentAndNoncurrent	4943000	USD
CY2015Q4	us-gaap	Other Liabilities OtherLiabilities	156901000	USD
CY2016Q4	us-gaap	Other Liabilities OtherLiabilities	117971000	USD
CY2015Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	16560000	USD
CY2016Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	14907000	USD
CY2015Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	140341000	USD
CY2016Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	103064000	USD
CY2014	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-1068000	USD
CY2015	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	1517000	USD
CY2016	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	6037000	USD
CY2014	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-70000	USD
CY2015	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	45000	USD
CY2016	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	307000	USD
CY2015Q4	us-gaap	Other Sundry Liabilities OtherSundryLiabilities	410000	USD
CY2016Q4	us-gaap	Other Sundry Liabilities OtherSundryLiabilities	410000	USD
CY2016	us-gaap	Payment Of Financing And Stock Issuance Costs PaymentOfFinancingAndStockIssuanceCosts	14700000	USD
CY2014	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-303000	USD
CY2015	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	0	USD
CY2016	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-919000	USD
CY2014	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	5723000	USD
CY2015	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	179000	USD
CY2015	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	561453000	USD
CY2016	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	186149000	USD
CY2015Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	1
CY2016Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	1
CY2015Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	5000000	shares
CY2016Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	5000000	shares
CY2015Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2016Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2016Q4	us-gaap	Preferred Stock Value PreferredStockValue	0	USD
CY2015Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	9908000	USD
CY2016Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	7699000	USD
CY2014	us-gaap	Previously Estimated Development Costs Incurred PreviouslyEstimatedDevelopmentCostsIncurred	164430000	USD
CY2015	us-gaap	Previously Estimated Development Costs Incurred PreviouslyEstimatedDevelopmentCostsIncurred	59117000	USD
CY2016	us-gaap	Proved Developed And Undeveloped Reserve Revision Of Previous Estimate Energy ProvedDevelopedAndUndevelopedReserveRevisionOfPreviousEstimateEnergy	-8300000	MBoe
CY2016	us-gaap	Previously Estimated Development Costs Incurred PreviouslyEstimatedDevelopmentCostsIncurred	16602000	USD
CY2014	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	725800000	USD
CY2015	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	618500000	USD
CY2016	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	251398000	USD
CY2014	us-gaap	Proceeds From Repayments Of Bank Overdrafts ProceedsFromRepaymentsOfBankOverdrafts	27755000	USD
CY2015	us-gaap	Proceeds From Repayments Of Bank Overdrafts ProceedsFromRepaymentsOfBankOverdrafts	-5624000	USD
CY2016	us-gaap	Proceeds From Repayments Of Bank Overdrafts ProceedsFromRepaymentsOfBankOverdrafts	-4829000	USD
CY2014	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	66197000	USD
CY2015	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	11854000	USD
CY2016	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	74823000	USD
CY2014	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	1083000	USD
CY2015	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	0	USD
CY2016	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	0	USD
CY2015Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	8191107000	USD
CY2016Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	8233435000	USD
CY2015Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	2581127000	USD
CY2016Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	2281105000	USD
CY2015Q4	us-gaap	Property Plant And Equipment Other PropertyPlantAndEquipmentOther	45489000	USD
CY2016Q4	us-gaap	Property Plant And Equipment Other PropertyPlantAndEquipmentOther	48590000	USD
CY2014	us-gaap	Proved Developed And Undeveloped Reserve Extension And Discovery Energy ProvedDevelopedAndUndevelopedReserveExtensionAndDiscoveryEnergy	35101000	MBoe
CY2015	us-gaap	Proved Developed And Undeveloped Reserve Extension And Discovery Energy ProvedDevelopedAndUndevelopedReserveExtensionAndDiscoveryEnergy	6651000	MBoe
CY2016	us-gaap	Proved Developed And Undeveloped Reserve Extension And Discovery Energy ProvedDevelopedAndUndevelopedReserveExtensionAndDiscoveryEnergy	5690000	MBoe
CY2013Q4	us-gaap	Proved Developed And Undeveloped Reserve Net Energy ProvedDevelopedAndUndevelopedReserveNetEnergy	159934000	MBoe
CY2014Q4	us-gaap	Proved Developed And Undeveloped Reserve Net Energy ProvedDevelopedAndUndevelopedReserveNetEnergy	179023000	MBoe
CY2015Q4	us-gaap	Proved Developed And Undeveloped Reserve Net Energy ProvedDevelopedAndUndevelopedReserveNetEnergy	135233000	MBoe
CY2016Q4	us-gaap	Proved Developed And Undeveloped Reserve Net Energy ProvedDevelopedAndUndevelopedReserveNetEnergy	117774000	MBoe
CY2014	us-gaap	Proved Developed And Undeveloped Reserve Production Energy ProvedDevelopedAndUndevelopedReserveProductionEnergy	18282000	MBoe
CY2015	us-gaap	Proved Developed And Undeveloped Reserve Production Energy ProvedDevelopedAndUndevelopedReserveProductionEnergy	19981000	MBoe
CY2016	us-gaap	Proved Developed And Undeveloped Reserve Production Energy ProvedDevelopedAndUndevelopedReserveProductionEnergy	17277000	MBoe
CY2014	us-gaap	Proved Developed And Undeveloped Reserve Purchase Of Mineral In Place Energy ProvedDevelopedAndUndevelopedReservePurchaseOfMineralInPlaceEnergy	385000	MBoe
CY2015	us-gaap	Proved Developed And Undeveloped Reserve Purchase Of Mineral In Place Energy ProvedDevelopedAndUndevelopedReservePurchaseOfMineralInPlaceEnergy	0	MBoe
CY2016	us-gaap	Proved Developed And Undeveloped Reserve Purchase Of Mineral In Place Energy ProvedDevelopedAndUndevelopedReservePurchaseOfMineralInPlaceEnergy	262000	MBoe
CY2014	us-gaap	Proved Developed And Undeveloped Reserve Revision Of Previous Estimate Energy ProvedDevelopedAndUndevelopedReserveRevisionOfPreviousEstimateEnergy	-10905000	MBoe
CY2015	us-gaap	Proved Developed And Undeveloped Reserve Revision Of Previous Estimate Energy ProvedDevelopedAndUndevelopedReserveRevisionOfPreviousEstimateEnergy	-36573000	MBoe
CY2014	us-gaap	Proved Developed And Undeveloped Reserves Sale Of Mineral In Place Energy ProvedDevelopedAndUndevelopedReservesSaleOfMineralInPlaceEnergy	1427000	MBoe
CY2015	us-gaap	Proved Developed And Undeveloped Reserves Sale Of Mineral In Place Energy ProvedDevelopedAndUndevelopedReservesSaleOfMineralInPlaceEnergy	191000	MBoe
CY2016	us-gaap	Proved Developed And Undeveloped Reserves Sale Of Mineral In Place Energy ProvedDevelopedAndUndevelopedReservesSaleOfMineralInPlaceEnergy	5338000	MBoe
CY2013Q4	us-gaap	Proved Developed Reserves Boe1 ProvedDevelopedReservesBOE1	123403000	MBoe
CY2014Q4	us-gaap	Proved Developed Reserves Boe1 ProvedDevelopedReservesBOE1	136790000	MBoe
CY2015Q4	us-gaap	Proved Developed Reserves Boe1 ProvedDevelopedReservesBOE1	115296000	MBoe
CY2016Q4	us-gaap	Proved Developed Reserves Boe1 ProvedDevelopedReservesBOE1	99079000	MBoe
CY2013Q4	us-gaap	Proved Undeveloped Reserve Boe1 ProvedUndevelopedReserveBOE1	36531000	MBoe
CY2014Q4	us-gaap	Proved Undeveloped Reserve Boe1 ProvedUndevelopedReserveBOE1	42233000	MBoe
CY2015Q4	us-gaap	Proved Undeveloped Reserve Boe1 ProvedUndevelopedReserveBOE1	19937000	MBoe
CY2016Q4	us-gaap	Proved Undeveloped Reserve Boe1 ProvedUndevelopedReserveBOE1	18695000	MBoe
CY2014	us-gaap	Provision For Other Losses ProvisionForOtherLosses	3562000	USD
CY2015	us-gaap	Provision For Other Losses ProvisionForOtherLosses	1191000	USD
CY2016	us-gaap	Provision For Other Losses ProvisionForOtherLosses	785000	USD
CY2014	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	559800000	USD
CY2015	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	503500000	USD
CY2016	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	371600000	USD
CY2014	us-gaap	Repayments Of Long Term Capital Lease Obligations RepaymentsOfLongTermCapitalLeaseObligations	2392000	USD
CY2015	us-gaap	Repayments Of Long Term Capital Lease Obligations RepaymentsOfLongTermCapitalLeaseObligations	3549000	USD
CY2016	us-gaap	Repayments Of Long Term Capital Lease Obligations RepaymentsOfLongTermCapitalLeaseObligations	3694000	USD
CY2014	us-gaap	Results Of Operations Depreciation Depletion And Amortization And Valuation Provisions ResultsOfOperationsDepreciationDepletionAndAmortizationAndValuationProvisions	347220000	USD
CY2015	us-gaap	Results Of Operations Depreciation Depletion And Amortization And Valuation Provisions ResultsOfOperationsDepreciationDepletionAndAmortizationAndValuationProvisions	1844726000	USD
CY2016	us-gaap	Results Of Operations Depreciation Depletion And Amortization And Valuation Provisions ResultsOfOperationsDepreciationDepletionAndAmortizationAndValuationProvisions	268901000	USD
CY2014	us-gaap	Results Of Operations Income Before Income Taxes ResultsOfOperationsIncomeBeforeIncomeTaxes	211031000	USD
CY2015	us-gaap	Results Of Operations Income Before Income Taxes ResultsOfOperationsIncomeBeforeIncomeTaxes	-1625951000	USD
CY2016	us-gaap	Results Of Operations Income Before Income Taxes ResultsOfOperationsIncomeBeforeIncomeTaxes	-94981000	USD
CY2014	us-gaap	Results Of Operations Income Tax Expense ResultsOfOperationsIncomeTaxExpense	82028000	USD
CY2015	us-gaap	Results Of Operations Income Tax Expense ResultsOfOperationsIncomeTaxExpense	-612496000	USD
CY2016	us-gaap	Results Of Operations Income Tax Expense ResultsOfOperationsIncomeTaxExpense	-32696000	USD
CY2014	us-gaap	Results Of Operations Oil And Gas Producing Activities Net Income Excluding Corporate Overhead And Interest Costs ResultsOfOperationsOilAndGasProducingActivitiesNetIncomeExcludingCorporateOverheadAndInterestCosts	129003000	USD
CY2015	us-gaap	Results Of Operations Oil And Gas Producing Activities Net Income Excluding Corporate Overhead And Interest Costs ResultsOfOperationsOilAndGasProducingActivitiesNetIncomeExcludingCorporateOverheadAndInterestCosts	-1013455000	USD
CY2016	us-gaap	Results Of Operations Oil And Gas Producing Activities Net Income Excluding Corporate Overhead And Interest Costs ResultsOfOperationsOilAndGasProducingActivitiesNetIncomeExcludingCorporateOverheadAndInterestCosts	-62285000	USD
CY2014	us-gaap	Results Of Operations Production Or Lifting Costs ResultsOfOperationsProductionOrLiftingCosts	165315000	USD
CY2015	us-gaap	Results Of Operations Production Or Lifting Costs ResultsOfOperationsProductionOrLiftingCosts	152560000	USD
CY2016	us-gaap	Results Of Operations Production Or Lifting Costs ResultsOfOperationsProductionOrLiftingCosts	108822000	USD
CY2014	us-gaap	Results Of Operations Revenue From Oil And Gas Producing Activities ResultsOfOperationsRevenueFromOilAndGasProducingActivities	723566000	USD
CY2015	us-gaap	Results Of Operations Revenue From Oil And Gas Producing Activities ResultsOfOperationsRevenueFromOilAndGasProducingActivities	371335000	USD
CY2016	us-gaap	Results Of Operations Revenue From Oil And Gas Producing Activities ResultsOfOperationsRevenueFromOilAndGasProducingActivities	282742000	USD
CY2015Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	817178000	USD
CY2016Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	681554000	USD
CY2014	us-gaap	Revenue Oil And Gas Services RevenueOilAndGasServices	476517000	USD
CY2015	us-gaap	Revenue Oil And Gas Services RevenueOilAndGasServices	265668000	USD
CY2016	us-gaap	Revenue Oil And Gas Services RevenueOilAndGasServices	122086000	USD
CY2014	us-gaap	Revenues Revenues	1572944000	USD
CY2015Q1	us-gaap	Revenues Revenues	255099000	USD
CY2015Q2	us-gaap	Revenues Revenues	214447000	USD
CY2015Q3	us-gaap	Revenues Revenues	212393000	USD
CY2015Q4	us-gaap	Revenues Revenues	172292000	USD
CY2015	us-gaap	Revenues Revenues	854231000	USD
CY2016Q1	us-gaap	Revenues Revenues	136184000	USD
CY2016Q2	us-gaap	Revenues Revenues	138305000	USD
CY2016Q3	us-gaap	Revenues Revenues	153408000	USD
CY2016Q4	us-gaap	Revenues Revenues	174280000	USD
CY2016	us-gaap	Revenues Revenues	602177000	USD
CY2014	us-gaap	Revisions Of Previous Quantity Estimates RevisionsOfPreviousQuantityEstimates	-135125000	USD
CY2015	us-gaap	Revisions Of Previous Quantity Estimates RevisionsOfPreviousQuantityEstimates	-213945000	USD
CY2016	us-gaap	Revisions Of Previous Quantity Estimates RevisionsOfPreviousQuantityEstimates	-51979000	USD
CY2014	us-gaap	Sales And Transfers Of Oil And Gas Produced Net Of Production Costs SalesAndTransfersOfOilAndGasProducedNetOfProductionCosts	-558252000	USD
CY2015	us-gaap	Sales And Transfers Of Oil And Gas Produced Net Of Production Costs SalesAndTransfersOfOilAndGasProducedNetOfProductionCosts	-218115000	USD
CY2016	us-gaap	Sales And Transfers Of Oil And Gas Produced Net Of Production Costs SalesAndTransfersOfOilAndGasProducedNetOfProductionCosts	-173920000	USD
CY2014	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	0	USD
CY2015	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	0	USD
CY2016	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	0	USD
CY2014	us-gaap	Settlement Of Asset Retirement Obligations Through Noncash Payments Amount SettlementOfAssetRetirementObligationsThroughNoncashPaymentsAmount	37689000	USD
CY2015	us-gaap	Settlement Of Asset Retirement Obligations Through Noncash Payments Amount SettlementOfAssetRetirementObligationsThroughNoncashPaymentsAmount	5694000	USD
CY2016	us-gaap	Settlement Of Asset Retirement Obligations Through Noncash Payments Amount SettlementOfAssetRetirementObligationsThroughNoncashPaymentsAmount	30897000	USD
CY2014	us-gaap	Share Based Compensation ShareBasedCompensation	24320000	USD
CY2015	us-gaap	Share Based Compensation ShareBasedCompensation	21468000	USD
CY2016	us-gaap	Share Based Compensation ShareBasedCompensation	13812000	USD
CY2014	us-gaap	Standardized Measure Of Discounted Future Net Cash Flow Of Proved Oil And Gas Reserves Other StandardizedMeasureOfDiscountedFutureNetCashFlowOfProvedOilAndGasReservesOther	-30448000	USD
CY2015	us-gaap	Standardized Measure Of Discounted Future Net Cash Flow Of Proved Oil And Gas Reserves Other StandardizedMeasureOfDiscountedFutureNetCashFlowOfProvedOilAndGasReservesOther	-209989000	USD
CY2016	us-gaap	Standardized Measure Of Discounted Future Net Cash Flow Of Proved Oil And Gas Reserves Other StandardizedMeasureOfDiscountedFutureNetCashFlowOfProvedOilAndGasReservesOther	-22381000	USD
CY2014	us-gaap	Standardized Measure Of Discounted Future Net Cash Flow Of Proved Oil And Gas Reserves Period Increase Decrease StandardizedMeasureOfDiscountedFutureNetCashFlowOfProvedOilAndGasReservesPeriodIncreaseDecrease	209768000	USD
CY2015	us-gaap	Standardized Measure Of Discounted Future Net Cash Flow Of Proved Oil And Gas Reserves Period Increase Decrease StandardizedMeasureOfDiscountedFutureNetCashFlowOfProvedOilAndGasReservesPeriodIncreaseDecrease	-846258000	USD
CY2016	us-gaap	Standardized Measure Of Discounted Future Net Cash Flow Of Proved Oil And Gas Reserves Period Increase Decrease StandardizedMeasureOfDiscountedFutureNetCashFlowOfProvedOilAndGasReservesPeriodIncreaseDecrease	-71276000	USD
CY2014	us-gaap	Standardized Measure Of Discounted Future Net Cash Flow Relating To Proved Oil And Gas Reserves Accretion Of Discount StandardizedMeasureOfDiscountedFutureNetCashFlowRelatingToProvedOilAndGasReservesAccretionOfDiscount	179190000	USD
CY2015	us-gaap	Standardized Measure Of Discounted Future Net Cash Flow Relating To Proved Oil And Gas Reserves Accretion Of Discount StandardizedMeasureOfDiscountedFutureNetCashFlowRelatingToProvedOilAndGasReservesAccretionOfDiscount	209979000	USD
CY2016	us-gaap	Standardized Measure Of Discounted Future Net Cash Flow Relating To Proved Oil And Gas Reserves Accretion Of Discount StandardizedMeasureOfDiscountedFutureNetCashFlowRelatingToProvedOilAndGasReservesAccretionOfDiscount	69069000	USD
CY2013Q4	us-gaap	Standardized Measure Of Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves StandardizedMeasureOfDiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReserves	1225976000	USD
CY2014Q4	us-gaap	Standardized Measure Of Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves StandardizedMeasureOfDiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReserves	1435744000	USD
CY2015Q4	us-gaap	Standardized Measure Of Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves StandardizedMeasureOfDiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReserves	589486000	USD
CY2016Q4	us-gaap	Standardized Measure Of Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves StandardizedMeasureOfDiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReserves	518210000	USD
CY2014	us-gaap	Stock Granted During Period Value Sharebased Compensation StockGrantedDuringPeriodValueSharebasedCompensation	22726000	USD
CY2015	us-gaap	Stock Granted During Period Value Sharebased Compensation StockGrantedDuringPeriodValueSharebasedCompensation	18547000	USD
CY2016	us-gaap	Stock Granted During Period Value Sharebased Compensation StockGrantedDuringPeriodValueSharebasedCompensation	16114000	USD
CY2014	us-gaap	Stock Issued During Period Shares Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures	486808000	shares
CY2015	us-gaap	Stock Issued During Period Shares Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures	819289000	shares
CY2016	us-gaap	Stock Issued During Period Shares Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures	1081217000	shares
CY2013Q4	us-gaap	Stockholders Equity StockholdersEquity	2173392000	USD
CY2014Q4	us-gaap	Stockholders Equity StockholdersEquity	2332394000	USD
CY2015Q4	us-gaap	Stockholders Equity StockholdersEquity	1313580000	USD
CY2016Q4	us-gaap	Stockholders Equity StockholdersEquity	1194070000	USD
CY2015Q4	us-gaap	Taxes Payable Current TaxesPayableCurrent	3767000	USD
CY2016Q4	us-gaap	Taxes Payable Current TaxesPayableCurrent	2219000	USD
CY2014	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	30147000	USD
CY2015	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	26345000	USD
CY2016	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	-22813000	USD
CY2013Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	0	USD
CY2014Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	410000	USD
CY2015Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	410000	USD
CY2016Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	410000	USD
CY2014	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	0	USD
CY2015	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	0	USD
CY2016	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	0	USD
CY2014	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	410000	USD
CY2015	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	0	USD
CY2016	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	0	USD
CY2014	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	0	USD
CY2015	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	0	USD
CY2016	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	0	USD
CY2013Q4	us-gaap	Valuation Allowances And Reserves Balance ValuationAllowancesAndReservesBalance	5342000	USD
CY2014Q4	us-gaap	Valuation Allowances And Reserves Balance ValuationAllowancesAndReservesBalance	5039000	USD
CY2015Q4	us-gaap	Valuation Allowances And Reserves Balance ValuationAllowancesAndReservesBalance	5199000	USD
CY2016Q4	us-gaap	Valuation Allowances And Reserves Balance ValuationAllowancesAndReservesBalance	3773000	USD
CY2014	us-gaap	Valuation Allowances And Reserves Charged To Cost And Expense ValuationAllowancesAndReservesChargedToCostAndExpense	3562000	USD
CY2015	us-gaap	Valuation Allowances And Reserves Charged To Cost And Expense ValuationAllowancesAndReservesChargedToCostAndExpense	1191000	USD
CY2016	us-gaap	Valuation Allowances And Reserves Charged To Cost And Expense ValuationAllowancesAndReservesChargedToCostAndExpense	785000	USD
CY2014	us-gaap	Valuation Allowances And Reserves Deductions ValuationAllowancesAndReservesDeductions	3865000	USD
CY2015	us-gaap	Valuation Allowances And Reserves Deductions ValuationAllowancesAndReservesDeductions	1031000	USD
CY2016	us-gaap	Valuation Allowances And Reserves Deductions ValuationAllowancesAndReservesDeductions	2211000	USD
CY2014	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	472000	shares
CY2015	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	0	shares
CY2016	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	0	shares
CY2014	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	49083000	shares
CY2015	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	49110000	shares
CY2016	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	50029000	shares
CY2014	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	48611000	shares
CY2015	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	49110000	shares
CY2016	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	50029000	shares
CY2015Q4	us-gaap	Workers Compensation Liability Current And Noncurrent WorkersCompensationLiabilityCurrentAndNoncurrent	16551000	USD
CY2016Q4	us-gaap	Workers Compensation Liability Current And Noncurrent WorkersCompensationLiabilityCurrentAndNoncurrent	15163000	USD
CY2016	us-gaap	Concentration Risk Credit Risk ConcentrationRiskCreditRisk	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;text-indent:30px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Financial instruments, which potentially subject us to concentrations of credit risk, consist primarily of trade receivables with a variety of oil and natural gas companies. We do not generally require collateral related to receivables. Our credit risk is considered to be limited due to the large number of customers comprising our customer base. Below are the third-party customers that accounted for more than 10% of our segment’s revenues: </font></div><div style="line-height:120%;font-size:10pt;"><div style="padding-left:0px;text-indent:0px;line-height:normal;padding-top:10px;"><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman;font-size:10pt;width:99.80506822612085%;border-collapse:collapse;text-align:left;"><tr><td colspan="9" rowspan="1"></td></tr><tr><td style="width:59%;" rowspan="1" colspan="1"></td><td style="width:12%;" rowspan="1" colspan="1"></td><td style="width:1%;" rowspan="1" colspan="1"></td><td style="width:1%;" rowspan="1" colspan="1"></td><td style="width:12%;" rowspan="1" colspan="1"></td><td style="width:1%;" rowspan="1" colspan="1"></td><td style="width:1%;" rowspan="1" colspan="1"></td><td style="width:12%;" rowspan="1" colspan="1"></td><td style="width:1%;" rowspan="1" colspan="1"></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:center;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;font-weight:bold;">2016</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:center;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;font-weight:bold;">2015</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:center;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;font-weight:bold;">2014</font></div></td></tr><tr><td style="vertical-align:top;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Oil and Natural Gas:</font></div></td><td colspan="2" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td></tr><tr><td style="vertical-align:top;padding-left:28px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Sunoco Logistics Partners L.P.</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">24</font></div></td><td style="vertical-align:bottom;padding-right:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">%</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">19</font></div></td><td style="vertical-align:bottom;padding-right:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">%</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">14</font></div></td><td style="vertical-align:bottom;padding-right:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">%</font></div></td></tr><tr><td style="vertical-align:top;background-color:#cceeff;padding-left:28px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Valero Energy Corporation</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">11</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-right:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">%</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">15</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-right:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">%</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">24</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-right:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">%</font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Drilling:</font></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td></tr><tr><td style="vertical-align:top;background-color:#cceeff;padding-left:28px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">QEP Resources, Inc.</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">28</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-right:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">%</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">25</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-right:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">%</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">19</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-right:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">%</font></div></td></tr><tr><td style="vertical-align:top;padding-left:28px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Whiting Petroleum Corp. (formerly Kodiak Oil and Gas Corp.)</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">18</font></div></td><td style="vertical-align:bottom;padding-right:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">%</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">7</font></div></td><td style="vertical-align:bottom;padding-right:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">%</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">9</font></div></td><td style="vertical-align:bottom;padding-right:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">%</font></div></td></tr><tr><td style="vertical-align:top;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Mid-Stream:</font></div></td><td colspan="2" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td></tr><tr><td style="vertical-align:top;padding-left:28px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">ONEOK Partners, L.P.</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">30</font></div></td><td style="vertical-align:bottom;padding-right:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">%</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">29</font></div></td><td style="vertical-align:bottom;padding-right:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">%</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">44</font></div></td><td style="vertical-align:bottom;padding-right:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">%</font></div></td></tr><tr><td style="vertical-align:top;background-color:#cceeff;padding-left:28px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Koch Energy Services, LLC</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">11</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-right:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">%</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">9</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-right:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">%</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">2</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-right:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">%</font></div></td></tr><tr><td style="vertical-align:top;padding-left:28px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Range Resources Corporation</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">10</font></div></td><td style="vertical-align:bottom;padding-right:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">%</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">5</font></div></td><td style="vertical-align:bottom;padding-right:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">%</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">2</font></div></td><td style="vertical-align:bottom;padding-right:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">%</font></div></td></tr><tr><td style="vertical-align:top;background-color:#cceeff;padding-left:28px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Tenaska Resources, LLC</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">10</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-right:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">%</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">18</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-right:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">%</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">22</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-right:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">%</font></div></td></tr><tr><td style="vertical-align:top;padding-left:28px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Laclede Group, Inc.</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">9</font></div></td><td style="vertical-align:bottom;padding-right:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">%</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">12</font></div></td><td style="vertical-align:bottom;padding-right:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">%</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">16</font></div></td><td style="vertical-align:bottom;padding-right:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">%</font></div></td></tr></table></div><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="line-height:120%;text-indent:32px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="line-height:120%;text-indent:32px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">We had a concentration of cash of </font><font style="font-family:inherit;font-size:10pt;">$8.3 million</font><font style="font-family:inherit;font-size:10pt;"> and </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">$2.3 million</font><font style="font-family:inherit;font-size:10pt;"> at </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">December 31, 2016</font><font style="font-family:inherit;font-size:10pt;"> and </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">2015</font><font style="font-family:inherit;font-size:10pt;">, respectively with one bank.</font></div><div style="line-height:120%;text-indent:32px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="line-height:120%;text-indent:32px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">The use of derivative transactions also involves the risk that the counterparties will be unable to meet the financial terms of the transactions. We considered this non-performance risk with regard to our counterparties and our own non-performance risk in our derivative valuation at </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">December 31, 2016</font><font style="font-family:inherit;font-size:10pt;"> and determined there was no material risk at that time. At </font><font style="font-family:inherit;font-size:10pt;">December 31, 2016</font><font style="font-family:inherit;font-size:10pt;">, the fair values of the net liabilities we had with each of the counterparties with respect to all of our commodity derivative transactions are listed in the table below: </font></div><div style="line-height:120%;font-size:10pt;"><div style="padding-left:0px;text-indent:0px;line-height:normal;padding-top:10px;"><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman;font-size:10pt;width:100%;border-collapse:collapse;text-align:left;"><tr><td colspan="4" rowspan="1"></td></tr><tr><td style="width:84%;" rowspan="1" colspan="1"></td><td style="width:1%;" rowspan="1" colspan="1"></td><td style="width:14%;" rowspan="1" colspan="1"></td><td style="width:1%;" rowspan="1" colspan="1"></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="3" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="text-align:center;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;font-weight:bold;">December 31, 2016</font></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="3" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="text-align:center;font-size:8pt;"><font style="font-family:inherit;font-size:8pt;font-weight:bold;">(In millions)</font></div></td></tr><tr><td style="vertical-align:top;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Canadian Imperial Bank of Commerce</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;background-color:#cceeff;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">$</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">11.1</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Bank of Montreal</font></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">8.0</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td></tr><tr><td style="vertical-align:top;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Scotiabank</font></div></td><td colspan="2" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">2.5</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Total liabilities</font></div></td><td style="vertical-align:bottom;border-bottom:3px double #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">$</font></div></td><td style="vertical-align:bottom;border-bottom:3px double #000000;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">21.6</font></div></td><td style="vertical-align:bottom;border-bottom:3px double #000000;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td></tr></table></div><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="line-height:120%;text-indent:32px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></div>
CY2016	us-gaap	Use Of Estimates UseOfEstimates	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;text-indent:30px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">The preparation of financial statements in conformity with generally accepted accounting principles (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. Actual results could differ from those estimates.</font></div></div>

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