Organization, Consolidation and Presentation of Financial Statements [Abstract]
Schedule of Other Ownership Interests [Table]
Schedule of Other Ownership Interests [Table]
Legal Entity [Axis]
Legal Entity [Axis]
Entity [Domain]
Entity [Domain]
Pioneer Southwest [Member]
Pioneer Southwest [Member]
Relating to Pioneer Southwest.
Other Ownership Interests Name [Axis]
Other Ownership Interests Name [Axis]
Other Ownership Interests, Name [Domain]
Other Ownership Interests, Name [Domain]
General Partner Interest [Member]
General Partner Interest [Member]
General Partner Interest [Member]
Limited Partner Interest [Member]
Limited Partner Interest [Member]
Limited Partner Interest [Member]
Summary Of Significant Accounting Policies [Line Items]
Summary Of Significant Accounting Policies [Line Items]
Summary Of Significant Accounting Policies [Line Items]
Stock Issued During Period, Shares, New Issues
Stock Issued During Period, Shares, New Issues
Proceeds from issuance of common stock, net of issuance costs
Proceeds from Issuance of Common Stock
Other Expense [Abstract]
Other Expense [Abstract]
Other Expense
Other Operating Expenses Text Block
Other Operating Expenses [Text Block]
Acquisitions and Divestitures [Abstract]
Acquisitions and Divestitures [Abstract]
Acquisitions and Divestitures [Table]
Gain (loss) on sale of assets [Table]
Gain (loss) on sale of assets [Table]
Scenario [Axis]
Scenario [Axis]
Scenario, Unspecified [Domain]
Scenario, Unspecified [Domain]
Proceeds Received Prior Year [Member]
Proceeds Received Prior Year [Member]
Proceeds Received Prior Year [Member]
Proceeds Received Current Year [Member]
Proceeds Received Current Year [Member]
Proceeds Received Current Year [Member]
Proceeds To Be Received In Future Year [Member] [Member]
Proceeds To Be Received In Future Period [Member]
Proceeds To Be Received In Future Period
Long Lived Assets Held-for-sale by Asset Type [Axis]
Long Lived Assets Held-for-sale by Asset Type [Axis]
Long Lived Assets Held-for-sale, Name [Domain]
Long Lived Assets Held-for-sale, Name [Domain]
Sendero [Member]
Sendero [Member]
Sendero [Member]
Subsequent Event Type [Axis]
Subsequent Event Type [Axis]
Subsequent Event Type [Domain]
Subsequent Event Type [Domain]
Subsequent Event [Member]
Subsequent Event [Member]
Operating Activities [Axis]
Operating Activities [Axis]
Operating Activities [Domain]
Operating Activities [Domain]
Lease Contract through Year 2 [Member]
Lease Contract through Year 2 [Member]
Lease Contract through Year 2 [Member]
Lease Contract for Year 3 [Member]
Lease Contract for Year 3 [Member]
Lease Contract for Year 3 [Member]
Discontinued Operations [Member]
Discontinued Operations [Member]
Disposal Group Name [Axis]
Disposal Group Name [Axis]
Disposal Groups, Including Discontinued Operations, Name [Domain]
Disposal Group Name [Domain]
Efs Midstream [Member]
Efs Midstream [Member]
EFS Midstream [Member]
Wolfcamp [Member]
Wolfcamp [Member]
Wolfcamp [Member]
Gaines Dawson [Member]
Gaines Dawson [Member]
Gaines Dawson [Member]
West Panhandle [Member]
West Panhandle [Member]
West Panhandle [Member]
Hugoton field [Member]
Hugoton field [Member]
Hugoton field [Member]
Pioneer Alaska [Member]
Pioneer Alaska [Member]
Pioneer Alaska [Member]
Barnett Shale Field [Member]
Barnett Shale Field [Member]
Barnett Shale Field [Member]
Eagle Ford Shale [Member]
Eagle Ford Shale [Member]
Eagle Ford Shale [Member]
Acquisitions and Divestitures [Line Items]
Gain Loss on Sale of Assets [Line Items]
Gain Loss on Sale of Assets [Line Items]
Equity Method Investment, Ownership Percentage
Equity Method Investment, Ownership Percentage
Equity Method Investment, Net Sales Proceeds
Proceeds from Sale of Equity Method Investments
Equity Method Investment, Realized Gain (Loss) on Disposal
Equity Method Investment, Realized Gain (Loss) on Disposal
Proceeds from Divestiture of Interest in Consolidated Subsidiaries
Proceeds from Divestiture of Interest in Consolidated Subsidiaries
Goodwill, Written off Related to Sale of Business Unit
Goodwill, Written off Related to Sale of Business Unit
Fair Value of Asset Group
Fair Value of Asset Group
Fair Value of Asset Group
Significant Acquisition and Disposal, Acquisition Costs or Sales Proceeds
Disposal Group, Including Discontinued Operation, Consideration
Maximum Payments From Related Party For Exploration Drilling And Completion Costs
Maximum Payments From Related Party For Exploration Drilling And Completion Costs
Maximum Payments From Related Party For Exploration Drilling And Completion Costs
Payments From Related Party For Exploration Drilling And Completion Costs Percent
Payments From Related Party For Exploration Drilling And Completion Costs Percent
Payments From Related Party For Exploration Drilling And Completion Costs Percent
Maximum Distribution Made to Limited Partner, Distributions Declared, Per Unit
Maximum Distribution Made to Limited Partner, Distributions Declared, Per Unit
Maximum Distribution Made to Limited Partner, Distributions Declared, Per Unit
Joint Venture Investment Ownership Percentage
Joint Venture Investment Ownership Percentage
Investment in Joint Venture
Interest and Other Income [Abstract]
Components of interest and other income
Interest and Other Income [Table Text Block]
Statement of Stockholders' Equity [Abstract]
Statement [Table]
Statement [Table]
Equity Components [Axis]
Equity Components [Axis]
Equity Component [Domain]
Equity Component [Domain]
Common Stock [Member]
Common Stock [Member]
Additional Paid-In Capital [Member]
Additional Paid-in Capital [Member]
Treasury Stock [Member]
Treasury Stock [Member]
Retained Earnings [Member]
Retained Earnings [Member]
Noncontrolling Interests [Member]
Noncontrolling Interest [Member]
Statement [Line Items]
Statement [Line Items]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance, shares
Shares, Outstanding
Beginning Balance
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest
Stock Issued During Period, Value, New Issues
Stock Issued During Period, Value, New Issues
Dividends declared ($0.04 per share)
Dividends, Cash
Exercise of long-term incentive plan stock options and employee stock purchases, shares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period
Exercise of long-term incentive plan stock options and employee stock purchases
Stock Issued During Period, Value, Stock Options Exercised
Treasury stock purchases, shares
Treasury Stock, Shares, Acquired
Treasury stock purchases
Treasury Stock, Value, Acquired, Cost Method
Stock Issued During Period, Shares, Conversion of Convertible Securities
Stock Issued During Period, Shares, Conversion of Convertible Securities
Conversion of 2.875% senior convertible notes
Stock Issued During Period, Value, Conversion of Convertible Securities
Sendero divestiture
Noncontrolling Interest, Decrease from Deconsolidation
Tax benefit related to stock-based compensation
Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation
Pioneer Southwest merger transaction costs
Adjustments to Additional Paid in Capital, Other
Compensation costs:
Share-based Compensation [Abstract]
Vested compensation awards, net, shares
Stock Issued Or Vested During Period Shares Stock Awards
Number of common stock issued as a result of granting or vesting of employee stock awards (including income tax benefits), and the shares of treasury stock purchases related to withholding taxes.
Vested compensation awards, net
Stock Issued Or Vested During Period Value Stock Awards
Par value of share-based payments that vest or lapse during the period.
Compensation costs included in net income
Allocated Share-based Compensation Expense
Cash distributions to noncontrolling interests
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders
Net loss
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest
Ending Balance, shares
Ending Balance
Interest income
Other Interest and Dividend Income
Deferred compensation plan income
Deferred Compensation Plan Income
Deferred Compensation Plan Income
Equity interest in income of unconsolidated affiliate
Income (Loss) from Equity Method Investments
Other income
Other Income
Total interest and other income
Other Nonoperating Income
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Financial Instruments
Derivative Instruments and Hedging Activities Disclosure [Text Block]
Statement of Financial Position [Abstract]
Common stock, par value
Common Stock, Par or Stated Value Per Share
Common stock, shares authorized
Common Stock, Shares Authorized
Common Stock, Shares, Issued
Common Stock, Shares, Issued
Treasury Stock, Shares
Treasury Stock, Shares
Derivative [Table]
Derivative [Table]
Derivative Instrument [Axis]
Derivative Instrument [Axis]
Derivative Contract Type [Domain]
Derivative Contract [Domain]
Oil contracts [Member]
Oil contracts [Member]
Oil contracts [Member]
Oil contracts, price per bbl [Member]
Oil contracts, price per bbl [Member]
Oil contracts, price per bbl [Member]
ERROR in label resolution.
Short Put [Member]
Short Put [Member]
Trading Activity [Axis]
Trading Activity [Axis]
Trading Activity, by Type [Domain]
Trading Activity, by Type [Domain]
Basis Swap Contracts for Year 2 [Member]
Basis Swap Contracts for Year 2 [Member]
Basis Swap Contracts for Year 2
Basis Swap Contracts for Fourth Quarter of Year One [Member]
Basis Swap Contracts for Fourth Quarter of Year One [Member]
Basis Swap Contracts for Fourth Quarter of Year One [Member]
Collar Contracts With Short Puts for Year 2 - Converted [Member]
Collar Contracts With Short Puts for Year 2 - Converted [Member]
Collar Contracts With Short Puts for Year 2 - Converted [Member]
Collar Contracts With Short Puts for January to June Year 2 [Member]
Collar Contracts With Short Puts for January to June Year 2 [Member]
Collar Contracts With Short Puts for January to June Year 2 [Member]
Collar Contracts With Short Puts for July to December Year 2 [Member]
Collar Contracts With Short Puts for July to December Year 2 [Member]
Collar Contracts With Short Puts for July to December Year 2 [Member]
Swap Contracts for Year 2 [Member]
Swap Contracts for Year 2 [Member]
Swap Contracts for Year 2 [Member]
Swap Contracts For Second Quarter of Year One [Member]
Swap Contracts For Second Quarter of Year One [Member]
Swap Contracts For Second Quarter of Year One [Member]
Swap Contracts For Third Quarter of Year One [Member]
Swap Contracts For Third Quarter of Year One [Member]
Swap Contracts For Third Quarter of Year One [Member]
Swap Contracts For Fourth Quarter of Year One [Member]
Swap Contracts For Fourth Quarter of Year One [Member]
Swap Contracts For Fourth Quarter of Year One [Member]
Collar Contracts With Short Puts for Current Year [Member]
Collar Contracts With Short Puts for Current Year [Member]
Collar Contracts With Short Puts for Current Year [Member]
Collar Contracts With Short Puts for Year 2 [Member]
Collar Contracts With Short Puts for Year 2 [Member]
Collar Contracts With Short Puts for Year 2 [Member]
Collar Contracts With Short Puts for Year 3 [Member]
Collar Contracts With Short Puts for Year 3 [Member]
Collar Contracts With Short Puts for Year 3 [Member]
Collar Contracts With Short Puts for Year 2 - Extendible for Year 3 [Member]
Collar Contracts With Short Puts for Year 1 - Extendible for Year 2 [Member]
Collar Contracts With Short Puts for Year 1 - Extendible for Year 2 [Member]
Swap Contracts for Current Year [Member]
Swap Contracts for Current Year [Member]
Swap Contracts for Current Year [Member]
Swap Contracts for Year 3 [Member]
Swap Contracts for Year 3 [Member]
Swap Contracts for Year 3 [Member]
Collar Contracts for Year 2 [Member]
Collar Contracts for Year 2 [Member]
Collar Contracts for Year 2 [Member]
Collar Contracts With Short Puts For Second Quarter of Year One [Member]
Collar Contracts With Short Puts For Second Quarter of Year One [Member]
Collar Contracts With Short Puts For Second Quarter of Year One [Member]
Collar Contracts With Short Puts For Third Quarter of Year One [Member]
Collar Contracts With Short Puts For Third Quarter of Year One [Member]
Collar Contracts With Short Puts For Third Quarter of Year One [Member]
Collar Contracts With Short Puts For Fourth Quarter of Year One [Member]
Collar Contracts With Short Puts For Fourth Quarter of Year One [Member]
Collar Contracts With Short Puts For Fourth Quarter of Year One [Member]
Rollfactor Swap Contracts for Current Year [Member]
Rollfactor Swap Contracts for Current Year [Member]
Rollfactor Swap Contracts for Current Year [Member]
Rollfactor Swap Contracts for Year 2 [Member]
Rollfactor Swap Contracts for Year 2 [Member]
Rollfactor Swap Contracts for Year 2 [Member]
Rollfactor Swap Contracts [Member]
Rollfactor Swap Contracts [Member]
Rollfactor Swap Contracts [Member]
Rollfactor Swap Contracts for Year 3 [Member]
Rollfactor Swap Contracts for Year 3 [Member]
Rollfactor Swap Contracts for Year 3 [Member]
Derivative [Line Items]
Derivative [Line Items]
Premium Paid on Derivative Contract
Premium Paid on Derivative Contract
Premium Paid on Derivative Contract
Derivative, Nonmonetary Notional Amount
Derivative, Nonmonetary Notional Amount
Derivative, Swap Type, Average Fixed Price
Derivative, Swap Type, Average Fixed Price
Derivative, Average Cap Price
Derivative, Average Cap Price
Derivative, Average Floor Price
Derivative, Average Floor Price
Derivative, Notional Amount, Price Per Unit
Derivative, Notional Amount, Price Per Unit
The price per unit of the notional amount of the derivative contract expressed in nonmonetary units. For example, the price per barrel specified in a fuel oil forward purchase contract.
Defined Contribution Pension and Other Postretirement Plans Disclosure [Abstract]
Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table]
Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table]
Class of Stock [Axis]
Class of Stock [Axis]
Class of Stock [Domain]
Class of Stock [Domain]
Restricted Stock Liability Awards [Member]
Restricted Stock Liability Awards [Member]
Restricted Stock Liability Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Deferred Compensation Arrangement with Individual, Compensation Expense
Deferred Compensation Arrangement with Individual, Compensation Expense
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period
Accounts Payable, Current
Accounts Payable, Current
Postretirement benefit obligation
Defined Benefit Plan, Benefit Obligation
Fair Value Disclosures [Abstract]
Fair Value Measurements
Fair Value Disclosures [Text Block]
Hedging Designation [Axis]
Hedging Designation [Axis]
Hedging Designation [Domain]
Hedging Designation [Domain]
Not Designated as Hedging Instrument [Member]
Not Designated as Hedging Instrument [Member]
Balance Sheet Location [Axis]
Balance Sheet Location [Axis]
Balance Sheet Location [Domain]
Balance Sheet Location [Domain]
Derivatives - Current [Member]
Derivative Current [Member]
Derivative Current [Member]
Commodity Price Derivatives [Member]
Commodity Contract [Member]
Interest Rate Derivatives [Member]
Interest Rate Contract [Member]
Income Statement Location [Axis]
Income Statement Location [Axis]
Income Statement Location [Domain]
Income Statement Location [Domain]
Derivative Gains (Losses), Net [Member]
Derivative Gains Losses [Member]
Derivative gains (losses) [Member]
Derivative gains, net
Gain (Loss) on Derivative Instruments, Net, Pretax
Acquisition and Divestitures
Mergers, Acquisitions and Dispositions Disclosures [Text Block]
Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]
Schedule of Share Based Incentive Award Activity
Schedue of Share Based Incentive Award Activity [Table Text Block]
Schedue of Share Based Incentive Award Activity [Table Text Block]
Exploratory Cost Disclosure [Abstract]
-- None. No documentation exists for this element. --
Exploratory Costs
Oil and Gas Exploration and Production Industries Disclosures [Text Block]
Income Statement [Abstract]
Revenues and other income:
Revenues [Abstract]
Oil and gas
Oil and Gas Revenue
Sales of purchased oil and gas
Revenue from Purchased Oil and Gas
Interest and other
Derivative gains, net
Gain (loss) on disposition of assets, net
Gain (Loss) on Disposition of Property Plant Equipment
Total revenues and other income
Revenues
Costs and expenses:
Costs and Expenses [Abstract]
Oil and gas production
Oil and Gas Production Expense
Production and ad valorem taxes
Taxes, Miscellaneous
Depletion, depreciation and amortization
Depreciation, Depletion and Amortization
Purchased oil and gas
Cost of Purchased Oil and Gas
Impairment of oil and gas properties
Impairment of Oil and Gas Properties
Exploration and abandonments
Exploration Abandonment and Impairment Expense
General and administrative
General and Administrative Expense
Accretion of discount on asset retirement obligations
Asset Retirement Obligation, Accretion Expense
Interest
Interest Expense
Other
Other Nonoperating Expense
Costs and Expenses
Costs and Expenses
Income (loss) from continuing operations before income taxes
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest
Income tax provision
Income Tax Expense (Benefit)
Income from continuing operations
Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest
Loss from discontinued operations, net of tax
Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest
Net income
Net income attributable to noncontrolling interests
Net Income (Loss) Attributable to Noncontrolling Interest
Net income (loss) attributable to common stockholders
Net Income (Loss) Attributable to Parent
Basic earnings per share:
Earnings Per Share, Basic [Abstract]
Income from continuing operations
Income (Loss) from Continuing Operations, Per Basic Share
Loss from discontinued operations
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share
Net income
Earnings Per Share, Basic
Diluted earnings per share:
Earnings Per Share, Diluted [Abstract]
Income from continuing operations
Income (Loss) from Continuing Operations, Per Diluted Share
Income (loss) from discontinued operations
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share
Net income
Earnings Per Share, Diluted
Weighted average shares outstanding:
Weighted Average Number of Shares Outstanding, Diluted [Abstract]
Basic weighted average shares outstanding
Weighted Average Number of Shares Outstanding, Basic
Diluted
Weighted Average Number of Shares Outstanding, Diluted
Dividends declared per share
Common Stock, Dividends, Per Share, Declared
Amounts attributable to common stockholders:
Income Amounts Attributable to Parent, Disclosures [Abstract]
Income from continuing operations
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent
Loss from discontinued operations, net of tax
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent
Earnings Per Share [Abstract]
Schedule of Earnings Per Share, Basic and Diluted, by Common Class, Including Two Class Method [Table]
Schedule of Earnings Per Share, Basic and Diluted, by Common Class, Including Two Class Method [Table]
Schedule of Earnings Per Share, Basic and Diluted, by Common Class, Including Two Class Method [Table]
Continuing Operations [Member]
Continuing Operations [Member]
Statement Operating Activities Segment [Line Items]
Statement Operating Activities Segment [Line Items]
Statement Operating Activities Segment [Line Items]
Income (loss) from continuing operations attributable to parent
Participating Securities, Distributed and Undistributed Earnings, Basic
Participating Securities, Distributed and Undistributed Earnings (Loss), Basic
Basic income (loss) from continuing operations attributable to common stockholders
Net Income (Loss) Available to Common Stockholders, Basic
Diluted income (loss) from continuing operations attributable to common stockholders
Net Income (Loss) Available to Common Stockholders, Diluted
Transportation commitment charges
Transportation Commitment Loss
Transportation Commitment Loss
Third-party vertical integration services
Third-party vertical integration services
Third-party vertical integration services (b)
Above market and idle drilling and well services equipment charges
Idle Rig Expense
Expenses from idle and terminate rigs.
Terminated drilling rig contract charges
Terminated Drilling Rig Expense
Terminated Drilling Rig Expense
Tangible Asset Impairment Charges
Tangible Asset Impairment Charges
Restructuring Charges
Restructuring and Related Cost, Incurred Cost
Other
Other General Expense
Contingency and environmental accrual adjustments
Change In Accrual For Legal And Environmental Contingencies
Change in Accrual for Legal and Environmental Contingencies.
Total other expense
GrossRevenuesIncludedInThirdPartyLossFromVerticalIntegrationServices
GrossRevenuesIncludedInThirdPartyLossFromVerticalIntegrationServices
GrossRevenuesIncludedInThirdPartyLossFromVerticalIntegrationServices
GrossExpensesIncludedInThirdPartyLossFromVerticalIntegrationServices
GrossExpensesIncludedInThirdPartyLossFromVerticalIntegrationServices
GrossExpensesIncludedInThirdPartyLossFromVerticalIntegrationServices
Asset Retirement Obligation [Abstract]
Asset Retirement Obligations
Asset Retirement Obligation Disclosure [Text Block]
Net Income Per Share
Earnings Per Share [Text Block]
Capitalized exploratory well and project activity
Capitalized Exploratory Well and Project Activity [Table Text Block]
Capitalized Exploratory Well and Project Activity [Table Text Block]
Capitalized Exploratory Costs And The Number Of Projects For Which Exploratory Costs Have Been Capitalized
Schedule of Projects with Exploratory Well Costs Capitalized for More than One Year [Table Text Block]
Incentive Plans
Compensation and Employee Benefit Plans [Text Block]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Table]
Disposal Groups, Including Discontinued Operations [Table]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Assets of Disposal Group, Including Discontinued Operation, Current
Disposal Group, Including Discontinued Operation, Assets, Current
Disposal Group, Including Discontinued Operation, Property, Plant and Equipment
Disposal Group, Including Discontinued Operation, Property, Plant and Equipment
Assets held for sale
Disposal Group, Including Discontinued Operation, Assets
Liabilities of Disposal Group, Including Discontinued Operation, Current
Disposal Group, Including Discontinued Operation, Liabilities, Current
Disposal Group, Including Discontinued Operation, Other Liabilities
Disposal Group, Including Discontinued Operation, Other Liabilities
Liabilities held for sale
Disposal Group, Including Discontinued Operation, Liabilities
Fair Value Measurements, Recurring and Nonrecurring [Table]
Fair Value Measurements, Recurring and Nonrecurring [Table]
Commodity Derivatives [Member]
Commodity [Member]
Fair Value, Hierarchy [Axis]
Fair Value, Hierarchy [Axis]
Fair Value, Measurements, Fair Value Hierarchy [Domain]
Fair Value Hierarchy [Domain]
Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Fair Value, Inputs, Level 1 [Member]
Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Inputs, Level 2 [Member]
Fair Value, Inputs, Level 3 [Member]
Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Securities, Fair Value Disclosure
Trading Securities
Investments, Fair Value Disclosure
Investments, Fair Value Disclosure
Derivative Asset, Fair Value, Net
Derivative Asset, Fair Value, Amount Not Offset Against Collateral
Deferred Compensation Plan Assets
Deferred Compensation Plan Assets
Assets, Fair Value Disclosure
Assets, Fair Value Disclosure
Derivative Liability, Fair Value, Net
Derivative Liability, Fair Value, Amount Not Offset Against Collateral
Liabilities, Fair Value Disclosure
Financial and Nonfinancial Liabilities, Fair Value Disclosure
Recurring Measurements, (Fair Value, Total)
Recurring Measurements, (Fair Value, Net)
Recurring Measurements, (Fair Value, Net).
Organization And Nature Of Operations
Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]
Diesel Swap Year 2 [Member]
Diesel Swap Year 2 [Member]
Diesel Swap Year 2 [Member]
December 15, 2021 Interest Rate Swaps [Member]
December 15, 2021 Interest Rate Swaps [Member]
December 15, 2021 Interest Rate Swaps [Member]
March 15, 2022 Interest Rate Swaps [Member]
March 15, 2022 Interest Rate Swaps [Member]
March 15, 2022 Interest Rate Swaps [Member]
March 2016 Interest Rate Swaps [Member]
March 2016 Interest Rate Swaps [Member]
March 2016 Interest Rate Swaps [Member]
Trading Activity, Gains and Losses, Net [Line Items]
Trading Activity, Gains and Losses, Net [Line Items]
Proceeds from Termination of Interest Rate Derivatives
Proceeds from Termination of Interest Rate Derivatives
Proceeds from Termination of Interest Rate Derivatives
Derivative, Fixed Interest Rate
Derivative, Fixed Interest Rate
Derivative, Average Variable Interest Rate
Derivative, Average Variable Interest Rate
Notional amount of debt
Swap Contract Notional Amount Fixed Rate of Interest and Variable LIBOR
Swap Contract Notional Amount Fixed Rate of Interest and Variable LIBOR
Notional amount of debt
Swap Contract Notional Amount Fixed Rate of Interest and Variable On-The-Run 10-yr Treasury Rate
Swap Contract Notional Amount Fixed Rate of Interest and Variable On-The-Run 10-yr Treasury Rate
Fair Value, by Balance Sheet Grouping, Disclosure Item Amounts [Axis]
Measurement Basis [Axis]
Fair Value, Disclosure Item Amounts [Domain]
Fair Value Measurement [Domain]
Portion at Fair Value Measurement [Member]
Portion at Fair Value Measurement [Member]
Reported Value Measurement [Member]
Reported Value Measurement [Member]
Estimate of Fair Value Measurement [Member]
Estimate of Fair Value Measurement [Member]
Investments
Investments
Debt, Current
Debt, Current
Long-term Debt, Excluding Current Maturities
Long-term Debt, Excluding Current Maturities
Debt Disclosure [Abstract]
Schedule of Long-term Debt Instruments [Table]
Schedule of Long-term Debt Instruments [Table]
Long-term Debt, Type [Axis]
Long-term Debt, Type [Axis]
Long-term Debt, Type [Domain]
Long-term Debt, Type [Domain]
Five Point Eight Seven Five Percent Senior Notes Due Two Thousand Sixteen [Member]
Five Point Eight Seven Five Percent Senior Notes Due Two Thousand Sixteen [Member]
Five Point Eight Seven Five Percent Senior Notes Due Two Thousand Sixteen [Member]
Six Point Six Five Percent Senior Notes Due Two Thousand Seventeen [Member]
Six Point Six Five Percent Senior Notes Due Two Thousand Seventeen [Member]
Six Point Six Five Percent Senior Notes Due Two Thousand Seventeen [Member]
Debt Instrument [Line Items]
Debt Instrument [Line Items]
Maximum Borrowing Capacity
Line of Credit Facility, Maximum Borrowing Capacity
Outstanding borrowing
Long-term Line of Credit
Debt Instrument, Interest Rate, Stated Percentage
Debt Instrument, Interest Rate, Stated Percentage
Repayments of Long-term Debt
Repayments of Long-term Debt
Senior Notes
Senior Notes
Fair Value of Assets Classified as Held for Sale [Abstract]
Fair Value of Assets Classified as Held for Sale [Abstract]
Asset Area [Axis]
Asset Area [Axis]
Asset Area [Axis]
Asset Area [Domain]
Asset Area [Domain]
[Domain] for Asset Area [Axis]
Gulf Coast [Member]
Gulf Coast [Member]
Gulf Coast [Member]
Mid-Continent [Member]
Mid-Continent [Member]
Mid-Continent [Member]
Permian Basin [Member]
Permian Basin [Member]
Permian Basin [Member]
Basis Swap Contracts for Second Quarter of Year One [Member]
Basis Swap Contracts for Second Quarter of Year One [Member]
Basis Swap Contracts for Second Quarter of Year One [Member]
Basis Swap Contracts for Third Quarter of Year One [Member]
Basis Swap Contracts for Third Quarter of Year One [Member]
Basis Swap Contracts for Third Quarter of Year One [Member]
Basis Swap Contracts for Current Year [Member]
Basis Swap Contracts for Current Year [Member]
Basis Swap Contracts for Current Year
Basis Swap Contracts for Year 3 [Member]
Basis Swap Contracts for Year 3 [Member]
Basis Swap Contracts for Year 3 [Member]
So Cal Basis Swap Contracts for Current Year [Member]
So Cal Basis Swap Contracts for Current Year [Member]
So Cal Basis Swap Contracts for Current Year [Member]
So Cal Basis Swap Contracts for Year 2 [Member]
So Cal Basis Swap Contracts for Year 2 [Member]
So Cal Basis Swap Contracts for Year 2 [Member]
So Cal Basis Swap Contracts for Year 3 [Member]
So Cal Basis Swap Contracts for Year 3 [Member]
So Cal Basis Swap Contracts for Year 3 [Member]
Gas contracts, in MMBTU [Member]
Gas contracts, in MMBTU [Member]
Gas contracts, in MMBTU [Member]
Gas contracts, price per MMBTU [Member]
Gas contracts, price per MMBTU [Member]
Gas contracts, price per MMBTU [Member]
Business Combinations [Abstract]
Schedule of Business Acquisitions, by Acquisition [Table]
Schedule of Business Acquisitions, by Acquisition [Table]
Business Acquisition [Axis]
Business Acquisition [Axis]
Business Acquisition, Acquiree [Domain]
Business Acquisition, Acquiree [Domain]
Business Acquisition [Line Items]
Business Acquisition [Line Items]
Oil and gas acres acquired
Gas and Oil Area, Developed, Net
Production, Barrels of Oil Equivalents
Production, Barrels of Oil Equivalents
Payments to Acquire Businesses, Net of Cash Acquired
Payments to Acquire Businesses, Net of Cash Acquired
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Buildings
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Buildings
AssetRetirementObligationLiabilitiesAcquiredInBusinessCombination
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net
Business Acquisition, Transaction Costs
Business Acquisition, Transaction Costs
Reconciliation of earnings attributable to common stockholders, basic and diluted
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
Reconciliation Of Basic To Diluted Weighted Average Common Shares Outstanding
Schedule of Weighted Average Number of Shares [Table Text Block]
Schedule of components of other expense
Schedule of Components of Other Expense Text Block
Schedule of Components of Other Expense Text Block
Presentation
Consolidation, Policy [Policy Text Block]
New Accounting Pronouncements, Policy [Policy Text Block]
New Accounting Pronouncements, Policy [Policy Text Block]
Document And Entity Information [Abstract]
Document and Entity Information [Abstract]
Document Type
Document Type
Amendment Flag
Amendment Flag
Document Period End Date
Document Period End Date
Document Fiscal Year Focus
Document Fiscal Year Focus
Document Fiscal Period Focus
Document Fiscal Period Focus
Trading Symbol
Trading Symbol
Entity Registrant Name
Entity Registrant Name
Entity Central Index Key
Entity Central Index Key
Current Fiscal Year End Date
Current Fiscal Year End Date
Entity Filer Category
Entity Filer Category
Entity Common Stock, Shares Outstanding
Entity Common Stock, Shares Outstanding
Marketing Gas contracts, in MMBTU [Member]
Marketing Gas contracts, in MMBTU [Member]
Marketing Gas contracts, in MMBTU [Member]
Marketing gas contracts, price per MMBTU [Member]
Marketing gas contracts, price per MMBTU [Member]
Marketing gas contracts, price per MMBTU [Member]
Marketing Oil contracts, in BBL [Member]
Marketing Oil contracts, in BBL [Member]
Marketing Oil contracts, in BBL [Member]
Marketing oil contracts, price per BBL [Member] [Member]
Marketing oil contracts, price per BBL [Member]
Marketing oil contracts, price per BBL [Member]
Basis Swap Contracts for June 2015 [Member]
Basis Swap Contracts for June 2015 [Member]
Basis Swap Contracts for June 2015 [Member]
Income Tax Disclosure [Abstract]
Income tax (provisions) benefits attributable to income from continuing operations
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]
Oil and Gas Production Type [Axis]
Oil and Gas Production Type [Axis]
Production Type [Domain]
Production Type [Domain]
Propane [Member]
Propane [Member]
Ethane [Member]
Ethane [Member]
Ethane [Member]
NGL contract, in BBLS [Member]
NGL contract, in BBLS [Member]
NGL contract, in BBLS [Member]
NGL contracts, price per BBL [Member]
NGL contracts, price per BBL [Member]
NGL contracts, price per BBL [Member]
NGL contract, MMBtu Equivalent [Member]
NGL contract, MMBtu Equivalent [Member]
NGL contract, in MMBtu [Member]
Collar Contracts for Current Year [Member]
Collar Contracts for Current Year [Member]
Collar Contracts for Current Year [Member]
Collar Contracts for Year 3 [Member]
Collar Contracts for Year 3 [Member]
Collar Contracts for Year 3 [Member]
Swap Contracts For Third Quarter of Year One [Member]
Terminated Swap Contracts For September through December 2016 [Member]
Terminated Swap Contracts For September through December 2016 [Member]
Proceeds from Termination of Propane Swap Contracts
Proceeds from Termination of Propane Swap Contracts
Proceeds from Termination of Propane Swap Contracts
Schedule of assets and liabilities measured at fair value on a recurring basis
Fair Value, Assets Measured on Recurring Basis [Table Text Block]
Fair Value Measurements, Nonrecurring [Table Text Block]
Fair Value Measurements, Nonrecurring [Table Text Block]
Fair Value of Assets Classified as Held for Sale [Table Text Block]
Fair Value of Assets Classified as Held for Sale [Table Text Block]
Fair Value of Assets Classified as Held for Sale [Table Text Block]
Schedule of carrying values and financial instruments not carried at fair value
Fair Value, by Balance Sheet Grouping [Table Text Block]
Cash, Cash Equivalents and Investments [Table Text Block]
Cash, Cash Equivalents and Investments [Table Text Block]
Derivatives - Noncurrent [Member]
Derivative Noncurrent [Member]
Derivative Noncurrent [Member]
Total derivatives, Asset, Gross
Derivative Asset, Fair Value, Gross Asset
Derivative Liability, Fair Value, Gross Liability
Derivative Liability, Fair Value, Gross Liability
Derivative Assets Offset In Balance Sheet
Derivative Assets Offset In Balance Sheet
Derivative Assets Offset In Balance Sheet
Derivative Liabilities Offset In Balance Sheet
Derivative Liabilities Offset In Balance Sheet
Derivative Liabilities Offset In Balance Sheet
Derivative Assets, Current
Derivative Asset, Current
Derivative Assets, Noncurrent
Derivative Asset, Noncurrent
Derivative Asset, Fair Value, Net
Derivative Liabilities, Current
Derivative Liability, Current
Derivative Liabilities, Noncurrent
Derivative Liability, Noncurrent
Asset Retirement Obligation [Table]
Asset Retirement Obligation [Table]
Asset Retirement Obligation [Table]
Asset Retirement Obligation [Line Items]
Asset Retirement Obligation [Line Items]
[Line Items] for Asset Retirement Obligation [Table]
Asset Retirement Obligation Accretion Expense From Discontinued Operations Included in Asset Retirement Obligation Balance At End of Period
Asset Retirement Obligation Accretion Expense From Discontinued Operations Included in Asset Retirement Obligation Balance At End of Period
Asset Retirement Obligation Accretion Expense From Discontinued Operations Included in Asset Retirement Obligation Balance At End of Period
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Beginning asset retirement obligations
Asset Retirement Obligation
AssetRetirementObligationLiabilitiesAcquiredInBusinessCombination
AssetRetirementObligationLiabilitiesAcquiredInBusinessCombination
AssetRetirementObligationLiabilitiesAcquiredInBusinessCombination
Asset Retirement Obligation, Liabilities Incurred
Asset Retirement Obligation, Liabilities Incurred
Changes in estimates
Asset Retirement Obligation, Revision of Estimate
Disposition of wells
Asset Retirement Obligations Written Off Through Disposition Of Wells
Asset Retirement Obligations Written Off Through Disposition of Wells.
Liabilities settled
Asset Retirement Obligation, Liabilities Settled
Accretion of discount from continuing operations
Accretion of discount from integrated services
Asset Retirement Obligation Accretion Expense Integrated Services
Asset Retirement Obligation Accretion Expense related to Integrated Services
Ending asset retirement obligations
Asset retirement obligations, current portions
Asset Retirement Obligation, Current
Capitalized Exploratory Well and Project Activity [Table]
Capitalized Exploratory Well and Project Activity [Table]
Capitalized Exploratory Well and Project Activity [Table]
Project [Axis]
Project [Axis]
Project [Domain]
Project [Domain]
Capitalized exploratory costs [Member]
Capitalized exploratory costs [Member]
Capitalized exploratory costs [Member]
Beginning capitalized exploratory costs
Capitalized Exploratory Well Costs
Additions to exploratory costs pending the determination of proved reserves
Capitalized Exploratory Well Cost, Additions Pending Determination of Proved Reserves
Reclassification due to determination of proved reserves
Reclassification to Well, Facilities, and Equipment Based on Determination of Proved Reserves
Capitalized Exploratory Well Cost Assets Disposition
Capitalized Exploratory Well Cost Assets Disposition
Capitalized Exploratory Well Cost Assets Disposition
Exploratory well costs charged to exploration expense
Capitalized Exploratory Well Cost, Charged to Expense
Ending capitalized exploratory costs
Schedule of Business Acquisitions, by Acquisition [Table Text Block]
Schedule of Business Acquisitions, by Acquisition [Table Text Block]
Schedule of Disposal Groups, Including Discontinued Operations, Income Statement, Balance Sheet and Additional Disclosures [Table Text Block]
Disposal Groups, Including Discontinued Operations [Table Text Block]
Discontinued Operations Assets and Liabilities Included in Assets and Liabilities Held for Sale [Table Text Block]
Discontinued Operations Assets and Liabilities Included in Assets and Liabilities Held for Sale [Table Text Block]
[Table Text Block] for Discontinued Operations Assets and Liabilities Included in Assets and Liabilities Held for Sale [Table]
Projects with Exploratory Well Costs Capitalized for More than One Year [Table]
Projects with Exploratory Well Costs Capitalized for More than One Year [Table]
Colorado [Member]
Colorado [Member]
Colorado [Member]
Nuna [Member]
Nuna [Member]
Nuna [Member]
Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items]
Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items]
Investments, Debt and Equity Securities [Abstract]
Schedule of Held-to-maturity Securities [Table]
Schedule of Held-to-maturity Securities [Table]
Debt Security [Axis]
Debt Security [Axis]
Major Types of Debt Securities [Domain]
Major Types of Debt Securities [Domain]
Cash and Cash Equivalents [Member]
Cash and Cash Equivalents [Member]
Commercial Paper [Member]
Commercial Paper [Member]
Corporate Bond Securities [Member]
Corporate Bond Securities [Member]
Bank Time Deposits [Member]
Bank Time Deposits [Member]
Range [Axis]
Range [Axis]
Range [Domain]
Range [Domain]
Schedule of Held-to-maturity Securities [Line Items]
Schedule of Held-to-maturity Securities [Line Items]
Cash and cash equivalents, at Carrying Value
Cash and Cash Equivalents, at Carrying Value
Short-term Investments
Short-term Investments
Long-term Investments
Long-term Investments
Cash, Cash Equivalents, and Short-term Investments
Cash, Cash Equivalents, and Short-term Investments
Restructuring and Related Activities [Abstract]
Schedule of Restructuring and Related Costs [Table]
Schedule of Restructuring and Related Costs [Table]
Cash [Member]
Cash [Member]
Deferred Compensation, Share-based Payments [Member]
Deferred Compensation, Share-based Payments [Member]
Leasehold Improvements [Member]
Leasehold Improvements [Member]
Property Subject to Operating Lease [Member]
Property Subject to Operating Lease [Member]
Consolidation Items [Axis]
Consolidation Items [Axis]
Consolidation Items [Domain]
Consolidation Items [Domain]
Segments [Axis]
Segments [Axis]
Segments [Domain]
Segments [Domain]
Restructuring Type [Axis]
Restructuring Type [Axis]
Type of Restructuring [Domain]
Type of Restructuring [Domain]
Employee Severance [Member]
Employee Severance [Member]
Contract Termination [Member]
Contract Termination [Member]
Employee Relocation [Member]
Employee Relocation [Member]
Restructuring Plan [Axis]
Restructuring Plan [Axis]
Restructuring Plan [Domain]
Restructuring Plan [Domain]
Other Comprehensive Income Location [Axis]
Other Comprehensive Income Location [Axis]
Other Comprehensive Income Location [Domain]
Other Comprehensive Income Location [Domain]
Restructuring Cost and Reserve [Line Items]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost Remaining
Restructuring and Related Cost, Expected Cost Remaining
Restructuring Reserve
Restructuring Reserve
Current income taxes
Current Income Tax Expense (Benefit)
Deferred income taxes
Deferred Income Tax Expense (Benefit)
Income tax benefit (provision)
Effective Tax Rate
Effective Income Tax Rate Reconciliation, Percent
Statutory Tax Rate
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent
Effective Income Tax Rate Reconciliation, Tax Credit, Research, Amount
Effective Income Tax Rate Reconciliation, Tax Credit, Research, Amount
Unrecognized tax benefit recognized in period
Unrecognized tax benefit recognized in period
Unrecognized tax benefit recognized in period
Unrecognized Tax Benefits
Unrecognized Tax Benefits
Interest And Other Income
Other Income and Other Expense Disclosure [Text Block]
Statement of Cash Flows [Abstract]
Cash flows from operating activities:
Net Cash Provided by (Used in) Operating Activities [Abstract]
Net income (loss)
Adjustments to reconcile net income to net cash provided by operating activities:
Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract]
Impairment of Inventory and Other Property and Equipment
Impairment of Inventory and Other Property and Equipment
Impairment of Inventory and Other Property and Equipment
Exploration expenses, including dry holes
Dry Hole Expense
The amount of noncash dry hole and unproved property abandonment expense during the period.
Deferred income taxes
Gain on disposition of assets, net
Discontinued operations
Adjustment Income Loss From Discontinued Operations Net Of Tax
Aggregate non-cash (income) loss and investing and financing cash flows from a disposal group.
Interest expense
Amortization of Debt Issuance Costs and Discounts
Derivative related activity
Noncash Gain Loss On Derivative Instruments
Aggregate net noncash gain (loss) on commodity and interest rate
derivative instruments.
Amortization of stock-based compensation
Amortization Stock Based Compensation
Non-cash amortization of unvested stock-based compensation during the operating period.
Other
Other Operating Activities, Cash Flow Statement
Change in operating assets and liabilities, net of effects from acquisitions and dispositions:
Increase (Decrease) in Operating Capital [Abstract]
Accounts receivable, net
Increase (Decrease) in Accounts Receivable
Income taxes receivable
Increase (Decrease) in Income Taxes Receivable
Inventories
Increase (Decrease) in Inventories
Prepaid expenses
Increase (Decrease) in Prepaid Expense
Derivatives
Increase (Decrease) in Derivative Assets and Liabilities
Other current assets
Increase (Decrease) in Other Current Assets
Accounts payable
Increase (Decrease) in Accounts Payable
Interest payable
Increase (Decrease) in Interest Payable, Net
Income taxes payable
Increase (Decrease) in Income Taxes Payable
Other current liabilities
Increase (Decrease) in Other Current Liabilities
Net cash provided by operating activities
Net Cash Provided by (Used in) Operating Activities
Cash flows from investing activities:
Net Cash Provided by (Used in) Investing Activities [Abstract]
Proceeds from disposition of assets, net of cash sold
Proceeds from Sale of Productive Assets
Business acquisition
Proceeds from Sale and Maturity of Held-to-maturity Securities
Proceeds from Sale and Maturity of Held-to-maturity Securities
Purchase of investment securities
Payments to Acquire Held-to-maturity Securities
Additions to oil and gas properties
Payments to Acquire Oil and Gas Property
Additions to other assets and other property and equipment, net
Payments to Acquire Other Productive Assets
Net cash used in investing activities
Net Cash Provided by (Used in) Investing Activities
Cash flows from financing activities:
Net Cash Provided by (Used in) Financing Activities [Abstract]
Borrowings under long-term debt
Proceeds from Issuance of Long-term Debt
Principal payments on long-term debt
Distributions to noncontrolling interests
Payments of Distributions to Affiliates
Borrowings of other liabilities
Borrowings Payments of Other Liabilities
Borrowings and payments of other liabilities
Exercise of long-term incentive plan stock options and employee stock purchases
Proceeds from Stock Options Exercised
Purchases of treasury stock
Payments for Repurchase of Common Stock
Tax (provision) benefits related to stock-based compensation
Excess Tax Benefit from Share-based Compensation, Financing Activities
Payments of financing fees
Payments of Financing Costs
Dividends paid
Payments of Dividends
Net cash provided by (used in) financing activities
Net Cash Provided by (Used in) Financing Activities
Net increase (decrease) in cash and cash equivalents
Cash and Cash Equivalents, Period Increase (Decrease)
Cash and cash equivalents, beginning of period
Cash and cash equivalents, end of period
Income Taxes
Income Tax Disclosure [Text Block]
Commitments and Contingencies Disclosure [Abstract]
Commitments And Contingencies
Commitments and Contingencies Disclosure [Text Block]
Property, Plant and Equipment [Table]
Property, Plant and Equipment [Table]
Property, Plant and Equipment, Type [Axis]
Property, Plant and Equipment, Type [Axis]
Property, Plant and Equipment, Type [Domain]
Property, Plant and Equipment, Type [Domain]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment [Line Items]
Capitalized Exploratory Well Costs that Have Been Capitalized for Period of One Year or Less
Capitalized Exploratory Well Costs that Have Been Capitalized for Period of One Year or Less
Capitalized Exploratory Well Costs that Have Been Capitalized for Period Greater than One Year
Capitalized Exploratory Well Costs that Have Been Capitalized for Period Greater than One Year
Capitalized Exploratory Well Costs
Projects that have Exploratory Well Costs that have been Capitalized for Period Greater than One Year, Number of Projects
Projects that have Exploratory Well Costs that have been Capitalized for Period Greater than One Year, Number of Projects
Schedule of asset retirement obligations
Schedule of Asset Retirement Obligations [Table Text Block]
Schedule of oil derivative contracts volume and weighted average price
Schedule of Oil Derivative Contracts volume and weighted average price [Table Text Block]
Schedule of Oil Derivative Contracts Volume and Weighted Average Price [Text Block]
Schedule of NGL derivative volumes and weighted average prices
Schedule of NGL Derivative Volumes and Weighted Average Prices [Table Text Block]
Schedule of NGL Derivative Volumes and Weighted Average Prices [Table Text Block]
Schedule of gas derivative volume and weighted average prices
Schedule Of Gas Volume And Weighted Average Prices [Table Text Block]
Schedule Of Gas Volume And Weighted Average Prices [Table Text Block]
Offsetting Asset and Liability
Offsetting Asset and Liability [Table Text Block]
Offsetting Asset and Liability [Table Text Block]
Schedule of derivative gains and losses recognized on statement of operations
Schedule of Derivative Gains and Losses Recognized on Statement of Operations [Table Text Block]
Schedule of Derivative Gains and Losses Recognized on Statement of Operations [Text Block]
Basis Of Presentation
Basis of Presentation and Significant Accounting Policies [Text Block]
Long-Term Debt
Long-term Debt [Text Block]
ASSETS
Assets [Abstract]
Current assets:
Assets, Current [Abstract]
Accounts receivable:
Accounts Receivable, Net, Current [Abstract]
Trade, net
Accounts Receivable, Net, Current
Due from affiliates
Due from Affiliate, Current
Income taxes receivable
Income Taxes Receivable, Current
Inventories
Inventory, Net
Prepaid expenses
Prepaid Expense, Current
Deferred income taxes
Deferred Tax Assets, Net of Valuation Allowance, Current
Assets held for sale
Other current assets:
Other Assets, Current [Abstract]
Other Assets, Current [Abstract]
Notes receivable
Notes, Loans and Financing Receivable, Gross, Current
Derivatives Assets, Current
Other
Other Assets, Current
Total current assets
Assets, Current
Property, plant and equipment, at cost:
Property, Plant and Equipment, Net [Abstract]
Oil and gas properties, using the successful efforts method of accounting:
Oil and Gas Property, Successful Effort Method, Net [Abstract]
Proved properties
Proved Oil and Gas Property, Successful Effort Method
Unproved properties
Unproved Oil and Gas Property, Successful Effort Method
Accumulated depletion, depreciation and amortization
Oil and Gas Property, Successful Effort Method, Accumulated Depreciation, Depletion and Amortization
Total property, plant and equipment
Oil and Gas Property, Successful Effort Method, Net
Deferred income taxes
Deferred Tax Assets, Net of Valuation Allowance, Noncurrent
Goodwill
Goodwill
Property, Plant and Equipment, Net
Property, Plant and Equipment, Net
Other assets:
Other Assets, Noncurrent [Abstract]
Investment in unconsolidated affiliate
Equity Method Investments
Derivative Assets, Noncurrent
Other, net
Other Assets, Noncurrent
Assets, Total
Assets
LIABILITIES AND STOCKHOLDERS' EQUITY
Liabilities and Equity [Abstract]
Current liabilities:
Liabilities, Current [Abstract]
Accounts payable:
Accounts Payable, Current [Abstract]
Trade
Accounts Payable, Trade, Current
Due to affiliates
Due to Affiliate, Current
Interest payable
Interest Payable, Current
Income taxes payable
Accrued Income Taxes, Current
Current portion of long-term debt
Long-term Debt, Current Maturities
Deferred Tax Liabilities, Net, Current
Deferred Tax Liabilities, Net, Current
Liabilities held for sale
Other current liabilities:
Other Liabilities, Current [Abstract]
Derivative Liabilities, Current
Other
Other Liabilities, Current
Total current liabilities
Liabilities, Current
Derivative Liabilities, Noncurrent
Deferred income taxes
Deferred Tax Liabilities, Net, Noncurrent
Other liabilities
Other Liabilities, Noncurrent
Stockholders' equity:
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract]
Common stock, $.01 par value
Common Stock, Value, Issued
Additional paid-in capital
Additional Paid in Capital
Treasury stock at cost
Treasury Stock, Value
Retained earnings
Retained Earnings (Accumulated Deficit)
Total equity attributable to common stockholders
Stockholders' Equity Attributable to Parent
Noncontrolling interests in consolidating subsidiaries
Stockholders' Equity Attributable to Noncontrolling Interest
Total equity
Commitments and contingencies
Commitments and Contingencies
Liabilities and Stockholders' Equity, Total
Liabilities and Equity
Reconciliation of Basic Weighted Average Shares to Diluted Weighted Average Shares [Table]
Reconciliation of Basic Weighted Average Shares to Diluted Weighted Average Shares [Table]
Reconciliation of Basic Weighted Average Shares to Diluted Weighted Average Shares [Table]
Antidilutive Securities [Axis]
Antidilutive Securities [Axis]
Antidilutive Securities, Name [Domain]
Antidilutive Securities, Name [Domain]
Performance Shares [Member]
Performance Shares [Member]
Stock Options [Member]
Employee Stock Option [Member]
Weighted Average Number of Shares Outstanding Reconciliation [Line Items]
Weighted Average Number of Shares Outstanding Reconciliation [Line Items]
Weighted Average Number of Shares Outstanding Reconciliation [Line Items]
Convertible senior notes dilution
Incremental Common Shares Attributable to Dilutive Effect of Conversion of Debt Securities
Diluted
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount
NonRecurring Fair Value Disclosures [Abstract]
NonRecurring Fair Value Disclosures [Abstract]
Impaired Long-Lived Assets Held and Used by Type [Axis]
Impaired Long-Lived Assets Held and Used by Type [Axis]
Impaired Long-Lived Assets Held and Used, Asset Name [Domain]
Impaired Long-Lived Assets Held and Used, Asset Name [Domain]
South Texas Eagle Ford Shale [Member]
South Texas Eagle Ford Shale [Member]
South Texas Eagle Ford Shale [Member]
South Texas Edwards And Austin Chalk [Member]
South Texas Edwards And Austin Chalk [Member]
SouthTexasEdwardsAndAustinChalkMember
Inventory Write-down
Inventory Write-down
Impairment of oil and gas properties
Management oil price outlook
Management oil price outlook
Management oil price outlook
Management gas price outlook
Management gas price outlook
Management gas price outlook
Impairment of Long-Lived Assets Held-for-use
Impairment of Long-Lived Assets Held-for-use
Share-based Award Activity [Abstract]
Share-based Award Activity [Abstract]
Restricted Stock Equity Awards [Member]
Restricted Stock Equity Awards [Member]
Restricted Stock-Equity Awards [Member]
Performance Units [Member]
Performance Units [Member]
Performance Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested, Number of Shares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested, Number of Shares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period