Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization
Nature of Operations [Text Block]
Income Tax Disclosure [Abstract]
Current taxes
Current Income Tax Expense (Benefit), Continuing Operations [Abstract]
Federal
Current Federal Tax Expense (Benefit)
State
Current State and Local Tax Expense (Benefit)
Deferred taxes
Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract]
Federal
Deferred Federal Income Tax Expense (Benefit)
State
Deferred State and Local Income Tax Expense (Benefit)
Income tax expense
Deferred Income Tax Expense (Benefit)
Fair Value Disclosures [Abstract]
Fair value measurements
Fair Value Disclosures [Text Block]
Document And Entity Information
-- None. No documentation exists for this element. --
Entity Registrant Name
Entity Registrant Name
Entity Central Index Key
Entity Central Index Key
Document Type
Document Type
Document Period End Date
Document Period End Date
Amendment Flag
Amendment Flag
Current Fiscal Year End Date
Current Fiscal Year End Date
Entity Current Reporting Status
Entity Current Reporting Status
Entity Filer Category
Entity Filer Category
Entity Common Stock, Shares Outstanding
Entity Common Stock, Shares Outstanding
Document Fiscal Year Focus
Document Fiscal Year Focus
Document Fiscal Period Focus
Document Fiscal Period Focus
Entity Voluntary Filers
Entity Voluntary Filers
Entity Well-known Seasoned Issuer
Entity Well-known Seasoned Issuer
Entity Public Float
Entity Public Float
Oil and Gas Exploration and Production Industries Disclosures [Abstract]
Results of Operations, Oil and Gas Producing Activities Net Income (Excluding Corporate Overhead and Interest Costs) [Abstract]
Results of Operations, Oil and Gas Producing Activities Net Income (Excluding Corporate Overhead and Interest Costs) [Abstract]
Revenues:
Results of Operations, Revenue from Oil and Gas Producing Activities [Abstract]
Oil and natural gas sales
Oil and Gas Sales Revenue
Production costs:
Results of Operations, Expense from Oil and Gas Producing Activities [Abstract]
Lease operating expenses
Oil and Gas Property, Lease Operating Expense
Production and ad valorem taxes
Production Tax Expense
Total production costs
Results of Operations, Production or Lifting Costs
Other costs:
Results of operations Expense from Oil and Gas Other Costs [Abstract]
Depletion and depreciation
Results of Operations, Depreciation, Depletion and Amortization, and Valuation Provisions
Accretion of asset retirement obligation
Results of Operations, Accretion of Asset Retirement Obligations
Income tax expense (benefit)
Results of Operations, Income Tax Expense
Results of operations
Results of Operations, Oil and Gas Producing Activities Net Income (Excluding Corporate Overhead and Interest Costs)
Disclosure of Compensation Related Costs, Share-based Payments [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]
Award Type [Axis]
Award Type [Axis]
Equity Award [Domain]
Equity Award [Domain]
Employee Stock Option
Employee Stock Option [Member]
Employment Termination [Axis]
Employment Termination [Axis]
Employment Termination [Axis]
Employment Termination [Domain]
Employment Termination [Domain]
[Domain] for Employment Termination [Axis]
Termination Caused By Death
Termination Caused By Death [Member]
Termination Caused By Death [Member]
Termination Without Cause
Termination Without Cause [Member]
Termination Without Cause [Member]
Vesting [Axis]
Vesting [Axis]
Vesting [Domain]
Vesting [Domain]
Less than one year of continuous employment
Period of Continuous Employment Less Than One Full Year [Member]
Represents the period of continuous employment or service less than one full year.
One year of continuous employment
Period of Continuous Employment One Full Year [Member]
Represents the period of continuous employment or service for one full year.
Two years of continuous employment
Period of Continuous Employment Two Full Year [Member]
Represents the period of continuous employment or service for two full years.
Three years of continuous employment
Period of Continuous Employment Three Full Year [Member]
Represents the period of continuous employment or service for three full years.
Four years of continuous employment
Period of Continuous Employment Four Full Year [Member]
Represents the period of continuous employment or service for four full years.
Equity and stock-based compensation
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Incremental percentage of option exercisable
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage
Cumulative percentage of option exercisable
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Cumulative, Percentage
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Cumulative, Percentage
Options, life of award
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period
Postemployment, vested awards expiration period
Share-based Compensation Arrangement by Share-based Payment Award, Vested Awards, Expiration Period
Share-based Compensation Arrangement by Share-based Payment Award, Vested Awards, Expiration Period
Acquisitions and Divestitures [Abstract]
Acquisitions and Divestitures [Abstract]
Operating results from discontinued operations
Schedule of Disposal Groups, Including Discontinued Operations, Income Statement, Balance Sheet and Additional Disclosures [Table Text Block]
Estimated fair value of assets acquired and associated liabilities of acquisition
Schedule of Business Acquisitions, by Acquisition [Table Text Block]
Significant components of deferred tax assets
Components of Deferred Tax Assets [Abstract]
Oil and natural gas properties, midstream service assets and other fixed assets
Deferred Tax Liabilities, Property, Plant and Equipment
Net operating loss carry-forward
Deferred Tax Assets, Operating Loss Carryforwards
Derivatives
Deferred Tax Liabilities, Derivatives
Stock-based compensation
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost
Accrued bonus
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Employee Bonuses
Capitalized interest
Deferred Tax Assets, Tax Deferred Expense, Other
Other
Deferred Tax Liabilities, Other
Gross deferred tax liability
Deferred Tax Liabilities Net Before Valuation Allowance
Amount of deferred tax liability attributable to taxable temporary differences net of deferred tax asset attributable to deductible temporary differences and carryforwards before valuation allowances.
Valuation allowance
Deferred Tax Assets, Valuation Allowance
Net deferred tax assets and liabilities
Deferred Tax Assets, Net [Abstract]
Deferred tax asset
Deferred Tax Assets, Net of Valuation Allowance
Deferred tax liability
Deferred Tax Liabilities, Gross
Net deferred tax liability
Deferred Tax Assets, Net
Deferred Tax Liabilities, Net
Deferred Tax Liabilities, Net
Restricted Stock Awards
Restricted Stock [Member]
Restricted stock awards
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Outstanding at the beginning of the period (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number
Granted (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period
Forfeited (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period
Vested (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period
Outstanding at the end of the period (in shares)
Weighted-average grant date fair value
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Outstanding at the beginning of the period (in dollars per share)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value
Fair value per performance share
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value
Forfeited (in dollars per share)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value
Vested (in dollars per share)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value
Outstanding at the end of the period (in dollars per share)
Tax Basis
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Tax Basis
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Tax Basis
Tax Benefit Realized from exercise of equity instruments other than options
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Tax Benefit
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Tax Benefit
Unrecognized equity and stock-based compensation expense
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Share-based Awards Other than Options
Weighted average period over which unrecognized equity and stock-based compensation expense is expected to be recognized
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition
Condensed Financial Information of Parent Company Only Disclosure [Abstract]
Schedule of condensed consolidating balance sheet
Condensed Balance Sheet [Table Text Block]
Schedule of condensed consolidating statement of operations
Condensed Income Statement [Table Text Block]
Schedule of condensed consolidating statement of cash flows
Condensed Cash Flow Statement [Table Text Block]
Statement of Financial Position [Abstract]
Preferred stock, par value (in dollars per share)
Preferred Stock, Par or Stated Value Per Share
Preferred stock, shares authorized
Preferred Stock, Shares Authorized
Preferred stock, shares issued
Preferred Stock, Shares Issued
Common stock, par value (in dollars per share)
Common Stock, Par or Stated Value Per Share
Common stock, shares authorized
Common Stock, Shares Authorized
Common stock issued
Common Stock, Shares, Outstanding
Fair Value Measurements, Recurring and Nonrecurring [Table]
Fair Value Measurements, Recurring and Nonrecurring [Table]
Range [Axis]
Range [Axis]
Range [Domain]
Range [Domain]
Minimum
Minimum [Member]
Maximum
Maximum [Member]
Measurement Frequency [Axis]
Measurement Frequency [Axis]
Fair Value, Measurement Frequency [Domain]
Fair Value, Measurement Frequency [Domain]
Nonrecurring
Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Hierarchy [Axis]
Fair Value, Hierarchy [Axis]
Fair Value Hierarchy [Domain]
Fair Value Hierarchy [Domain]
Level 3
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]
Discount rate used, percent
Fair Value Inputs, Discount Rate
Derivatives, deferred premium paid
Derivative Deferred Premium Paid Early Termination
The portion of the change in fair value of a net derivative asset (liability) measured using unobservable inputs that results from the early termination of a contract. This value is also included in the total of the reconciliation resulting from settlements.
Subsequent Events [Abstract]
Schedule of new commodity contracts
Schedule of Derivative Instruments [Table Text Block]
Subsequent Event [Table]
Subsequent Event [Table]
Investment, Name [Axis]
Investment, Name [Axis]
Investment, Name [Domain]
Investment, Name [Domain]
Medallion Gathering And Processing LLC
Medallion Gathering And Processing LLC [Member]
Medallion Gathering And Processing LLC [Member]
Other Commitments [Axis]
Other Commitments [Axis]
Other Commitments [Domain]
Other Commitments [Domain]
Financing Commitments
Financing Commitments [Member]
Financing Commitments [Member]
Variable Interest Entities [Axis]
Variable Interest Entities [Axis]
Variable Interest Entity, Classification [Domain]
Variable Interest Entity, Classification [Domain]
Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity, Not Primary Beneficiary [Member]
Credit Facility [Axis]
Credit Facility [Axis]
Credit Facility [Domain]
Credit Facility [Domain]
Secured Debt
Secured Debt [Member]
Subsequent Event Type [Axis]
Subsequent Event Type [Axis]
Subsequent Event Type [Domain]
Subsequent Event Type [Domain]
Subsequent events
Subsequent Event [Member]
Subsequent Event [Line Items]
Subsequent Event [Line Items]
Borrowing capacity
Proceeds from Debt, Net of Issuance Costs
Line of Credit Facility, Amount Outstanding
Long-term Line of Credit
Employee positions eliminated
Restructuring and Related Cost, Expected Number of Positions Eliminated
Consultant positions eliminated
Restructuring and Related Cost, Expected Number of Consultant Positions Eliminated
Restructuring and Related Cost, Expected Number of Consultant Positions Eliminated
Accrued payable - affiliates
Due to Related Parties, Current
Subsequent events
Subsequent Events [Text Block]
Statement of Cash Flows [Abstract]
Cash flows from operating activities:
Net Cash Provided by (Used in) Operating Activities, Continuing Operations [Abstract]
Net income (loss)
Net Income (Loss) Available to Common Stockholders, Basic
Adjustments to reconcile net income to net cash provided by operating activities:
Adjustments, Noncash Items, to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract]
Deferred income tax expense
Income Tax Expense (Benefit), Intraperiod Tax Allocation
Depletion, depreciation and amortization
Depreciation Depletion And Amortization Continuing and Discontinued Operations
Depreciation Depletion And Amortization Continuing and Discontinued Operations
Bad debt expense
Provision for Doubtful Accounts
Impairment expense
Impairment of Long-Lived Assets Held-for-use
Non-cash stock-based compensation, net of amount capitalized
Share-based Compensation
Accretion of asset retirement obligations
Asset Retirement Obligation, Accretion Expense
Gain on derivatives, net
Gain (Loss) on Derivative Instruments, Net, Pretax
Cash settlements received for matured derivatives, net
Cash Settlements Of Matured Derivative Financial Instruments, Net
Cash Settlements Of Matured Derivative Financial Instruments, Net
Cash settlements received for early terminations and modifications of derivatives, net
Proceeds From Cash Settlements Early Terminations of Derivative Financial Instruments, Net
Proceeds From Cash Settlements Early Terminations of Derivative Financial Instruments, Net
Change in net present value of deferred premiums paid for derivatives
Change In Net Present Value Of Deferred Premiums For Derivative Financial Instruments
Change In Net Present Value Of Deferred Premiums For Derivative Financial Instruments
Cash premiums paid for derivatives
Premiums Paid for Derivative Financial Instruments
The amount of premiums paid for derivative financial instruments. As a noncash item, it is deducted from net income when calculating cash provided by or used in operations using the indirect method.
Amortization of debt issuance costs
Amortization of Financing Costs, Continuing and Discontinued Operations
Amortization of Financing Costs, Continuing and Discontinued Operations
Write-off of debt issuance costs
Write off of Deferred Debt Issuance Cost
Amortization of October 2011 Notes premium
Amortization of Debt Discount (Premium)
Loss on disposal of assets, net
Gain (Loss) on Disposition of Assets, Continuing and Discontinued Operations
Gain (Loss) on Disposition of Assets, Continuing and Discontinued Operations
Cash settlement of performance unit awards
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Share-based Liabilities Paid
Other
Other Noncash Income (Expense)
(Increase) decrease in accounts receivable
Increase (Decrease) in Accounts Receivable
Increase in other assets
Increase (Decrease) in Other Operating Assets
Increase (decrease) in accounts payable
Increase (Decrease) in Accounts Payable
Increase (decrease) in undistributed revenues and royalties
Increase (Decrease) in Undistributed Revenue and Accrued Royalties
The increase (decrease) in the obligations due for undistributed revenue and royalties during the reporting period. Royalty payments are also paid by the lease holders for oil, gas, and mineral extraction.
Increase in other accrued liabilities
Increase (Decrease) in Other Accrued Liabilities
Increase in other noncurrent liabilities
Increase (Decrease) in Other Noncurrent Liabilities
Increase in fair value of performance unit awards
Increase (Decrease) In Fair Value Of Performance Unit Awards
Increase (Decrease) In Fair Value Of Performance Unit Awards
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, Continuing Operations [Abstract]
Capital expenditures:
Payments to Acquire Productive Assets [Abstract]
Acquisitions of oil and natural gas properties
Payments to Acquire Productive Assets
Acquisition of mineral interests
Payments to Acquire Mineral Rights
Oil and natural gas properties
Payments to Acquire Oil and Gas Property
Midstream service assets
Payments to Acquire Pipeline and Gathering Assets
The cash outflow associated with acquisition of or capital improvements on pipeline and gathering assets of the reporting entity during the reporting period.
Other fixed assets
Payments to Acquire Other Productive Assets
Investment in equity method investee
Payments to Acquire Equity Method Investments
Proceeds from dispositions of capital assets, net of costs
Proceeds from Sale of 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, Continuing Operations [Abstract]
Borrowings on Senior Secured Credit Facility
Proceeds from Long-term Lines of Credit
Payments on Senior Secured Credit Facility
Repayments of Long-term Lines of Credit
Issuance of January 2022 Notes
Proceeds from Issuance of Senior Long-term Debt
Issuance of May 2022 Notes
Proceeds from Issuance of Long-term Debt
Proceeds from issuance of common stock, net of offering costs
Proceeds from Issuance of Common Stock
Proceeds from exercise of employee stock options
Proceeds from Stock Options Exercised
Purchase of treasury stock
Payments for Repurchase of Common Stock
Payments for debt issuance costs
Payments of Loan Costs
Net cash provided by financing activities
Net Cash Provided by (Used in) Financing Activities
Net (decrease) increase in cash and cash equivalents
Cash and Cash Equivalents, Period Increase (Decrease)
Cash and cash equivalents, beginning of period
Cash and Cash Equivalents, at Carrying Value
Cash and cash equivalents, end of period
Risks and Uncertainties [Abstract]
Concentration Risk [Table]
Concentration Risk [Table]
Concentration Risk Type [Axis]
Concentration Risk Type [Axis]
Concentration Risk Type [Domain]
Concentration Risk Type [Domain]
Customers
Customer Concentration Risk [Member]
Credit Concentration Risk
Credit Concentration Risk [Member]
Concentration Risk Benchmark [Axis]
Concentration Risk Benchmark [Axis]
Concentration Risk Benchmark [Domain]
Concentration Risk Benchmark [Domain]
Total revenues
Sales [Member]
Oil and natural gas sales accounts receivable
Accounts Receivable Oil and Gas Sales [Member]
Due from customers or clients for oil and gas that has been sold but not delivered.
Trade Accounts Receivable
Trade Accounts Receivable [Member]
Joint operations accounts receivable
Accounts Receivable Oil and Gas Joint Interest Billing Receivables [Member]
Current portion of accounts receivable attributable to joint interest partners in oil and gas properties. These are billings to the non-operators associated with the operation of wells and are based on those owners' working interests in the wells.
Purchased Oil Sales
Purchased Oil Sales [Member]
Purchased Oil Sales [Member]
Purchased Oil and Other Products Sales
Purchased Oil and Other Products Sales [Member]
Purchased Oil and Other Products Sales [Member]
Partner Type [Axis]
Partner Type [Axis]
Partner Type of Partners' Capital Account, Name [Domain]
Partner One
Partner One [Member]
Represents information pertaining to joint interest partner one.
Partner Two
Partner Two [Member]
Represents information pertaining to joint interest partner two.
Partner Three
Partner Three [Member]
Represents information pertaining to joint interest partner three.
Partner Four
Partner Four [Member]
Represents information pertaining to joint interest partner four
Related Party [Axis]
Related Party [Axis]
Related Party [Domain]
Related Party [Domain]
Affiliates of Taga Resources
AffiliatesOfTargaResouces [Member]
Affiliates of Targa Resources, Inc. ("Targa")
Major Customers [Axis]
Customer [Axis]
Name of Major Customer [Domain]
Customer [Domain]
Customer one
Customer One [Member]
Represents information pertaining to customer one.
Customer two
Customer Two [Member]
Represents information pertaining to customer two.
Customer three
Customer Three [Member]
Represents information pertaining to customer three.
Customer four
Customer Four [Member]
Represents information pertaining to customer four.
Customer five
Customer five [Member]
Customer Five
Credit risk
Concentration Risk [Line Items]
Number of major customers
Concentration Risk, Number of Major Customers
Represents the number of major customers who are responsible for concentration of risk.
Concentration risk (as a percent)
Concentration Risk, Percentage
Concentration Risk, Number of Additional Major Customers Over Sales Concentration
Concentration Risk, Number of Additional Major Customers Over Sales Concentration
The number of additional major customers included in this disclosure of concentration risk, not included in the disclosure of customer concentration risk for total sales.
Concentration Risk, Number of Joint Interest Partners
Concentration Risk, Number of Joint Interest Partners
The number of joint interest partners for which concentration risk is disclosed
Cash balances exceeded by balance insured by FDIC
Cash, Uninsured Amount
Related Party Transactions [Abstract]
Related Party Transactions [Abstract]
Net oil and natural gas sales
Revenue from Related Parties
Oil and natural gas sales receivable
Due from Affiliate, Current
Schedule of Condensed Financial Statements [Table]
Condensed Financial Statements [Table]
Consolidation Items [Axis]
Consolidation Items [Axis]
Consolidation Items [Domain]
Consolidation Items [Domain]
Intercompany eliminations
Consolidation, Eliminations [Member]
Reportable Legal Entities
Reportable Legal Entities [Member]
Legal Entity [Axis]
Legal Entity [Axis]
Entity [Domain]
Entity [Domain]
Laredo
Parent Company [Member]
Subsidiary Guarantors
Guarantor Subsidiaries [Member]
Subsidiary guarantees
Condensed Financial Statements, Captions [Line Items]
Accounts receivable, net
Accounts Receivable, Net, Current
Other current assets
Other Assets Current Not Separately Disclosed
Represents other current assets not separately disclosed in the balance sheet including but not limited to cash and cash equivalents, derivative financial instruments and deferred income taxes.
Total oil and natural gas properties, net
Oil and Gas Property, Full Cost Method, Net
Total midstream service assets, net
Pipeline and Gas Gathering Assets, Net
Represents the aggregate carrying amount, net of accumulated depreciation, as of the balance sheet date, of pipeline and gas gathering assets that are expected to be realized or consumed after one year (or the normal operating cycle, if longer).
Total other fixed assets, net
Property, Plant and Equipment, Other, Net
Investment in equity method investee
Equity Method Investments
Total other long-term assets
Other Assets Noncurrent Not Separately Disclosed
Represents other noncurrent assets not separately disclosed in the balance sheet including but not limited to derivative financial instruments, deferred income taxes, and deferred loan costs.
Total assets
Assets
Accounts payable
Accounts Payable, Current
Other current liabilities
Other Liabilities Current Not Separately Disclosed
Represents other current liabilities not separately disclosed in the balance sheet including but not limited to undistributed revenue and royalties accrued expenses and derivative financial instruments.
Other long-term liabilities
Other Liabilities Noncurrent Not Separately Disclosed
Represents other noncurrent liabilities not separately disclosed in the balance sheet including but not limited to derivative financial instruments and asset retirement obligations.
Long-term debt
Long-term Debt, Excluding Current Maturities
Stockholders' equity
Stockholders' Equity Attributable to Parent
Total liabilities and stockholders' equity
Liabilities and Equity
Debt Disclosure [Abstract]
Debt
Debt Disclosure [Text Block]
Income Tax Examination [Table]
Income Tax Examination [Table]
Geographical [Axis]
Geographical [Axis]
Geographical [Domain]
Geographical [Domain]
OKLAHOMA
OKLAHOMA
Valuation Allowance by Deferred Tax Asset [Axis]
Valuation Allowance by Deferred Tax Asset [Axis]
Deferred Tax Asset [Domain]
Deferred Tax Asset [Domain]
Charitable contribution carry-forward
Charitable Contribution Carryforward [Member]
Represents details pertaining to the entity's charitable contribution carry-forward.
Income Tax Authority [Axis]
Income Tax Authority [Axis]
Income Tax Authority [Domain]
Income Tax Authority [Domain]
State
State and Local Jurisdiction [Member]
Federal
Domestic Tax Authority [Member]
Income Tax Examination [Line Items]
Income Tax Examination [Line Items]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent
Effective Income Tax Rate Reconciliation, Percent
Effective Income Tax Rate Reconciliation, Percent
Income Tax Expense (Benefit)
Income Tax Expense (Benefit)
Net operating loss carry-forwards
Operating Loss Carryforwards
Income Tax Benefit from Share-based Compensation, Potential Amount to be recognized in Additional Paid in Capital
Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation, Potential Amount
Represents the amount of excess tax benefits which have not been reflected as an adjustment to additional paid in capital because of the uncertainty of realization of those amounts. The reporting entity will record these amounts in additional paid in capital when the net operating loss carryforward from these deductions is realized.
Deferred Tax Assets, Valuation Allowance
Schedule of Significant Acquisitions and Disposals [Table]
Schedule of Significant Acquisitions and Disposals [Table]
Significant Acquisitions and Disposals by Transaction [Axis]
Significant Acquisitions and Disposals by Transaction [Axis]
Significant Acquisitions and Disposals, Transaction [Domain]
Significant Acquisitions and Disposals, Transaction [Domain]
Midland Basin
Midland Basin [Member]
Midland Basin [Member]
Proved and Unproved Oil and Natural Gas Properties in Glasscock County Texas
Proved and Unproved Oil and Natural Gas Properties in Glasscock County Texas [Member]
Proved and Unproved Oil and Natural Gas Properties in Glasscock County Texas [Member]
Proved and Unproved Oil and Natural Gas Properties in Reagan County Texas
Proved and Unproved Oil and Natural Gas Properties in Reagan County Texas [Member] [Member]
Proved and Unproved Oil and Natural Gas Properties in Reagan County Texas [Member] [Member]
Significant Acquisitions and Disposals [Line Items]
Significant Acquisitions and Disposals [Line Items]
Area of Land (in acres)
Area of Land
Payments to acquire property, plant, and equipment
Payments to Acquire Property, Plant, and Equipment
Cash consideration
Payments to Acquire Businesses, Gross
Payments to acquire mineral rights
Oil and gas related party transactions
Schedule of Related Party Transactions [Table Text Block]
Employee compensation
Disclosure of Compensation Related Costs, Share-based Payments [Text Block]
Net cash flows provided (used) by operating activities
Change in investments between affiliates
Increase (Decrease) in Investments with Affiliates
Increase (Decrease) in Investments with Affiliates
Capital expenditures and other
Net cash flows provided by financing activities
Net (decrease) increase in cash and cash equivalents
Schedule of amounts incurred and charged to interest expenses
Schedule of Amount Incurred and Charged to Interest Expenses [Table Text Block]
Tabular disclosure of amounts incurred and charged to interest expenses.
Schedule of carrying amount and fair value of debt instruments
Schedule of Carrying Values and Estimated Fair Values of Debt Instruments [Table Text Block]
Aggregate capitalized costs related to oil and natural gas production activities
Capitalized Costs, Oil and Gas Producing Activities, Net [Abstract]
Evaluated properties
Capitalized Costs, Proved Properties
Unevaluated properties
Capitalized Costs of Unproved Properties Excluded from Amortization, Cumulative
Capitalized costs
Capitalized Costs, Oil and Gas Producing Activities, Gross
Less accumulated depletion, depreciation and impairment
Capitalized Costs, Accumulated Depreciation, Depletion, Amortization and Valuation Allowance Relating to Oil and Gas Producing Activities
Net capitalized costs
Capitalized Costs, Oil and Gas Producing Activities, Net
Oil and natural gas property costs not being amortized
Capitalized Costs of Unproved Properties Excluded from Amortization, Period Cost [Abstract]
Unevaluated costs and related carrying costs, excluded from the amortization
Capitalized Costs of Unproved Properties Excluded from Amortization, Period Cost
Unproved properties, cummulative cost
Earnings Per Share [Abstract]
Net income per share
Earnings Per Share [Text Block]
Performance unit awards
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Schedule of Nonvested Share Activity
Schedule of Nonvested Share Activity [Table Text Block]
Schedule of Share-based Compensation, Stock Options, Activity
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]
Share Based Compensation Schedule Of Vesting Rights Options
Share Based Compensation Schedule Of Vesting Rights Options [Table Text Block]
Share Based Compensation Schedule Of Vesting Rights Options [Table Text Block]
Schedule of Share-base Payment Award, Equity Instruments Other Than Options, Valuation Assumptions
Schedule of Share-base Payment Award, Equity Instruments Other Than Options, Valuation Assumptions [Table Text Block]
Schedule of Share-base Payment Award, Equity Instruments Other Than Options, Valuation Assumptions [Table Text Block]
Schedule of Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan
Schedule of Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan [Table Text Block]
Schedule of Nonvested Performance-based Units Activity
Schedule of Nonvested Performance-based Units Activity [Table Text Block]
Schedule of Defined Contribution Plans Disclosures
Schedule of Defined Contribution Plans Disclosures [Table Text Block]
Tabular disclosure of the entity's defined contribution plans.
Accounting Policies [Abstract]
Accounts receivable
Receivables, Net, Current [Abstract]
Term of accounts receivable to be considered as past due (in days)
Threshold Period Past Due for Accounts Receivable
Threshold Period Past Due for Accounts Receivable
Term of past due balances to be reviewed individually for collectability (in days)
Threshold Period Past Due for Review of Accounts Receivable
Threshold Period Past Due for Review of Accounts Receivable
Oil and natural gas sales
Accounts Receivable Oil and Gas Sales Net Current
Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for oil and gas sales receivable that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.
Joint operations, net
Oil and Gas Joint Interest Billing Receivables, Current
Purchased oil and other product sales
Accounts Receivable, Purchased Oil and Other Product Sales, Current
Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for purchased oil and other products that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.
Other
Other Receivables, Net, Current
Total
Allowance for doubtful accounts of accounts receivable for joint operations
Allowance for Doubtful Accounts Receivable, Current
Other current liabilities
Other Liabilities, Current [Abstract]
Accrued interest payable
Interest Payable, Current
Lease operating expense payable
Lease Operating Expense Accrual
Represents the carrying value as of the balance sheet date of the obligations incurred through that date and payable for operating lease expense related to property used in oil and gas production.
Accrued compensation and benefits
Deferred Compensation Liability, Current
Other accrued liabilities
Other Accrued Liabilities, Current
Total other current liabilities
Other Liabilities, Current
Commitments and Contingencies Disclosure [Abstract]
Other Commitments [Table]
Other Commitments [Table]
Unrecorded Unconditional Purchase Obligation by Category of Item Purchased [Axis]
Unrecorded Unconditional Purchase Obligation by Category of Item Purchased [Axis]
Unconditional Purchase Obligation, Category of Goods or Services Acquired [Domain]
Unconditional Purchase Obligation, Category of Goods or Services Acquired [Domain]
Drilling Contracts
Drilling Contracts [Member]
Represents the commitments under drilling contracts.
Other Commitments [Line Items]
Other Commitments [Line Items]
Drilling rig fees
Well Service Expense
Future commitments
Purchase Commitment, Remaining Minimum Amount Committed
Lease commitments
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
2015
Operating Leases, Future Minimum Payments Due, Next Twelve Months
2016
Operating Leases, Future Minimum Payments, Due in Two Years
2017
Operating Leases, Future Minimum Payments, Due in Three Years
2018
Operating Leases, Future Minimum Payments, Due in Four Years
2019
Operating Leases, Future Minimum Payments, Due in Five Years
Thereafter
Operating Leases, Future Minimum Payments, Due Thereafter
Total
Operating Leases, Future Minimum Payments Due
Rent expense
Operating Leases, Rent Expense, Net [Abstract]
Rent expense
Operating Leases, Rent Expense, Net
Variable Interest Entity [Abstract]
Variable Interest Entity [Abstract]
Variable Interest Entity
Variable Interest Entity [Text Block]
Variable Interest Entity [Text Block]
Reorganization Grant Date
Vesting Alternative One, Reorganization Grant Date [Member]
Vesting Alternative One, Reorganization Grant Date [Member]
Annually After Reorganization Grant Date
Vesting Alternative One, Annually After Reorganization Grant Date [Member]
Vesting Alternative One, Annually After Reorganization Grant Date [Member]
One Year From Grant Date
Vesting Alternative Two, One Year From Grant Date [Member]
Vesting Alternative Two, One Year From Grant Date [Member]
Two Years from Grant Date
Vesting Alternative Two, Two Years From Grant Date [Member]
Vesting Alternative Two, Two Years From Grant Date [Member]
Three Years from Grant Date
Vesting Alternative Two, Three Years From Grant Date [Member]
Vesting Alternative Two, Three Years From Grant Date [Member]
Vesting in two years
Vesting Alternative Three, Vesting In Two Years [Member]
Vesting Alternative Three, Vesting In Two Years [Member]
Vesting in three years
Vesting Alternative Three, Vesting In Three Years [Member]
Vesting Alternative Three, Vesting In Three Years [Member]
Vesting one year from grant date
Vesting Alternative Four, One Year From Grant Date [Member]
Vesting Alternative Four, One Year From Grant Date [Member]
Vesting three years from grant date
Vesting Alternative Five, 3 Years From Grant Date [Member]
Vesting Alternative Five, 3 Years From Grant Date [Member]
Plan Name [Axis]
Plan Name [Axis]
Plan Name [Domain]
Plan Name [Domain]
Long Term Incentive Plan
Long Term Incentive Plan [Member]
Represents the Long-Term Incentive Plan (the LTIP), of the entity.
Requisite service period
Share-based Compensation Arrangement by Share-based Payment Award, Award Requisite Service Period
Share-based compensation arrangement by share-based payment award, number of shares authorized
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized
Vesting rights, percentage
Number of Officers Affected by plan modification
Share-based Compensation Arrangement by Share-based Payment Award, Plan Modification, Number of Officers Affected
Share-based Compensation Arrangement by Share-based Payment Award, Plan Modification, Number of Officers Affected
Number of Employees Affected by plan modification
Share-based Compensation Arrangement by Share-based Payment Award, Plan Modification, Number of Employees Affected
Incremental Compensation Cost due to plan modification
Share-based Compensation Arrangement by Share-based Payment Award, Plan Modification, Incremental Compensation Cost
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number
Award Date [Axis]
Award Date [Axis]
Award Date [Domain]
Award Date [Domain]
February 15, 2013
February 15, 2013 [Member]
February 15, 2013 [Member]
February 3, 2012
February 3, 2012 [Member]
February 3, 2012 [Member]
Performance Unit Awards
Performance Unit Awards [Member]
Performance unit awards accounted for as liability awards as they will be settled in cash at the end of the requisite service period based on the achievement of certain performance criteria.
Risk-free interest rate (as a percent)
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate
Dividend yield (as a percent)
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate
Expected volatility (as a percent)
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate
Share Price
Share Price
Fair Value of awards
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value
Liability related to performance unit awards
Deferred Compensation Share-based Arrangements, Liability, Current and Noncurrent
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table]
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table]
Equity and stock-based compensation
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock-based compensation expense
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost
Less amounts capitalized in oil and natural gas properties
Employee Service Share-based Compensation, Allocation of Recognized Period Costs, Capitalized Amount
Net stock-based compensation expense
Allocated Share-based Compensation Expense
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Recently issued accounting standards
New Accounting Pronouncements and Changes in Accounting Principles [Text Block]
Credit Risk
Concentration Of Credit Risk And Related Party Disclosures [Text Block]
Disclosure of concentrations of credit risk and related party transactions.
Business Combinations [Abstract]
Schedule of Business Acquisitions, by Acquisition [Table]
Schedule of Business Acquisitions, by Acquisition [Table]
Business Acquisition [Line Items]
Business Acquisition [Line Items]
Common stock issued
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable
Evaluated oil and natural gas properties
Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Proved Oil And Natural Gas Properties
Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Proved Oil And Natural Gas Properties
Unevaluated oil and natural gas properties
Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Unproved Oil And Natural Gas Properties
Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Unproved Oil And Natural Gas Properties
Other assets
Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Other Assets
Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Other Assets
Liabilities assumed
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities
Equity issued for acquisition, net of offering costs (in shares)
Stock Issued During Period, Shares, Acquisitions
Closing price per share
Sale of Stock, Price Per Share
Lack of marketability discount to share price, percent
Fair Value Inputs, Discount for Lack of Marketability
Schedule of Long-term Debt Instruments [Table]
Schedule of Long-term Debt Instruments [Table]
Variable Rate [Axis]
Variable Rate [Axis]
Variable Rate [Domain]
Variable Rate [Domain]
Base Rate
Base Rate [Member]
London Interbank Offered Rate (LIBOR)
London Interbank Offered Rate (LIBOR) [Member]
Long-term Debt, Type [Axis]
Long-term Debt, Type [Axis]
Long-term Debt, Type [Domain]
Long-term Debt, Type [Domain]
Senior Notes
Senior Notes [Member]
Debt Instrument, Redemption, Period [Axis]
Debt Instrument, Redemption, Period [Axis]
Debt Instrument, Redemption, Period [Domain]
Debt Instrument, Redemption, Period [Domain]
Period 1
Debt Instrument, Redemption, Period One [Member]
Period 2
Debt Instrument, Redemption, Period Two [Member]
Period 3
Debt Instrument, Redemption, Period Three [Member]
Period 4
Debt Instrument, Redemption, Period Four [Member]
Period 5
Debt Instrument, Redemption, Period Five [Member]
Debt Instrument [Axis]
Debt Instrument [Axis]
Debt Instrument, Name [Domain]
Debt Instrument, Name [Domain]
January 2011
Senior Notes 9.5 Percent Issued January 2011 [Member]
Represents information pertaining to the Senior Notes which were issued in January 2011.
October 2011
Senior Notes 9.5 Percent Issued October 2011 [Member]
Represents information pertaining to the Senior Notes which were issued in October 2011.
2019 Notes
Senior Notes 9.5 Percent Due 2019 [Member]
Senior Notes 9.5 Percent Due 2019 [Member]
Letters of credit
Letter of Credit [Member]
May 2022 Notes
Senior Notes Seven Point Three Seven Five Percent Due Two Thousand Twenty Two [Member]
Represents the senior notes with an interest rate of 7.375 percent, due in 2022.
Line of Credit
Line of Credit [Member]
Senior Secured Credit Facility
Senior Secured Credit Facility [Member]
Represents the Senior Secured Credit Facility entered into by the entity.
Fourth Amended and Restated Credit Agreement
Fourth Amended and Restated Credit Agreement [Member]
Fourth Amended and Restated Credit Agreement [Member]
Senior Note 5.625% due 2022
Senior Note 5.625 Percent Due 2022 [Member]
Senior Note 5.625 Percent Due 2022 [Member]
Senior Notes 7.375 Percent Due 2022
Senior Notes 7.375 Percent Due 2022 [Member]
Represents the senior notes with an interest rate of 7.375 percent, due in 2022.
Debt
Debt Instrument [Line Items]
Cash payments for interest
Interest Expense, Debt
Amortization of debt issuance costs and other adjustments
Amortization of Financing Costs
Change in accrued interest
Increase (Decrease) in Interest Payable, Net
Interest costs incurred
Interest Costs Incurred
Less capitalized interest
Interest Costs Capitalized
Total interest expense
Interest Expense
Interest rate (as a percent)
Debt Instrument, Interest Rate, Stated Percentage
Basis spread on variable rate (percent)
Debt Instrument, Basis Spread on Variable Rate
Face amount of debt
Debt Instrument, Face Amount
Net proceeds from offering
Redemption price of debt instrument (as a percent)
Debt Instrument, Redemption Price, Percentage
Debt Instrument, Redemption Price, Percentage of Aggregate Principal Amount, That Can Be Redeemed By Equity Offering
Debt Instrument, Redemption Price, Percentage of Aggregate Principal Amount, That Can Be Redeemed By Equity Offering
Percentage of aggregate principal amount of debt that can be redeemed with the proceeds from one or more private or public equity offerings.
Debt instrument redeemed by equity offering redemption price (percentage)
Debt Instrument, Redeemed By Equity Offering, Redemption Price, Percentage
Debt Instrument, Redeemed By Equity Offering, Redemption Price, Percentage
Debt instrument redemption principal amount outstanding threshold (percentage)
Debt Instrument, Redemption, Principal Amount Outstanding Threshold, Percentage
Percentage of aggregate principal amount of debt that must remain outstanding immediately after the redemption of debt.
Debt instrument redemption principal amount outstanding threshold (in days)
Debt Instrument, Redemption, Principal Amount Outstanding Threshold, Days
Maximum period of time after an equity offering within which debt redemption must occur.
Debt Instrument, redemption period start date
Debt Instrument, Redemption Period, Start Date
Debt Instrument, redemption period end date
Debt Instrument, Redemption Period, End Date
Redemption price of debt instrument, percentage of principal amount redeemed
Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemed
Percentage of principal amount of 2022 notes issued under the Indenture, which must remain outstanding immediately after redemption
Debt Instrument Percentage of Original Principal Amount Outstanding after Redemption from Equity Offerings
Represents the percentage of the original principal amount of the debt instrument that must remain outstanding after the entity has redeemed a portion of the debt instrument with net cash proceeds from equity offerings.
Redemption period of the Notes following the closing date of equity offering (in days)
Debt Instrument Redemption Period Following Closing Date of Equity Offering
Represents the redemption period of the debt instrument following the closing date of equity offering.
Borrowing capacity
Line of Credit Facility, Maximum Borrowing Capacity
Current borrowing capacity
Line of Credit Facility, Current Borrowing Capacity
Aggregate elected commitment
Line of Credit Facility, Aggregate Elected Commitment
Line of Credit Facility, Aggregate Elected Commitment
Commitment fee on unused capacity (as a percent)
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage
Collateral as a percentage of present value of proved reserves
Debt Instrument, Collateral Amount, Percentage
Debt Instrument, Collateral Amount, Percentage
Current ratio requirement (as a percent)
Debt Instrument Covenant Current Ratio
Represents the ratio of current assets to current liabilities, which is necessary to be maintained under the terms of the senior credit facilities' covenants.
Debt Instrument Covenant Consolidated Interest Coverage Ratio
Debt Instrument, Covenant, Minimum Consolidated Interest Coverage Ratio
Represents the ratio of consolidated adjusted earnings before interest, taxes, depreciation and amortization to interest expense, which is necessary to be maintained under the terms of the senior credit facilities' covenants.
Tax-deferred contributions of eligible employees as a percentage of their annual compensation
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent
Employer matching contribution, percent
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay
Percentage of employer contributions vested upon receipt
Defined Contribution Plan, Employers Matching Contribution, Annual Vesting Percentage
Contributions
Defined Contribution Plan, Cost Recognized
Revenue recognition
Revenue Recognition [Abstract]
Value of net underproduced (overproduced) positions arising during the period increasing (decreasing) oil and natural gas sales
Gas Balancing Asset (Liability), Period Increase (Decrease), Net
Gas Balancing Asset (Liability), Period Increase (Decrease), Net
General and administrative expense
General and Administrative Expense [Abstract]
Fees received for the operation of jointly-owned oil and natural gas properties
Jointly Owned Oil and Natural Gas Property Fees Received for Operation
Represents the amount of fees received for the operation of jointly-owned oil and natural gas properties.
Energy [Axis]
Energy [Axis]
Energy [Domain]
Energy [Domain]
Crude Oil
Crude Oil [Member]
Natural Gas
Natural Gas [Member]
Measurement Basis [Axis]
Measurement Basis [Axis]
Fair Value Measurement [Domain]
Fair Value Measurement [Domain]
Portion at Fair Value Measurement [Member]
Portion at Fair Value Measurement [Member]
Total fair value
Estimate of Fair Value Measurement [Member]
Recurring
Fair Value, Measurements, Recurring [Member]
Level 1
Fair Value, Inputs, Level 1 [Member]
Level 2
Fair Value, Inputs, Level 2 [Member]
Derivative Instrument Risk [Axis]
Derivative Instrument [Axis]
Derivative Contract Type [Domain]
Derivative Contract [Domain]
Oil Derivatives
Oil Derivatives [Member]
Represents information pertaining to oil derivative contracts entered into by the entity.
Natural gas derivatives
Natural Gas Derivatives [Member]
Represents information pertaining to natural gas derivative contracts entered into by the entity.
Oil Deferred Premiums
Oil Deferred Premiums [Member]
Oil Deferred Premiums [Member]
Natural Gas Deferred Premiums
Natural Gas Deferred Premiums [Member]
Natural Gas Deferred Premiums [Member]
Assets, Fair Value Disclosure [Abstract]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets before netting, current
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement, Current
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement, Current
Amounts Offset, current
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset, Current
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset, Current
Derivative Asset, current
Derivative Asset, Current
Derivative Asset before netting, noncurrent
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement, Noncurrent
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement, Noncurrent
Amounts Offset, noncurrent
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset, Noncurrent
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset, Noncurrent
Derivative Asset, noncurrent
Derivative Asset, Noncurrent
Liabilities, Fair Value Disclosure [Abstract]
Liabilities, Fair Value Disclosure [Abstract]
Derivative Liabilities before netting, current
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement, Current
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement, Current
Amount offset, current
Derivative Liability, Fair Value, Gross Asset and Right to Reclaim Cash, Offset, Current
Derivative Liability, Fair Value, Gross Asset and Right to Reclaim Cash, Offset, Current
Derivative Liability, current
Derivative Liability, Current
Derivative Liabilities before netting, noncurrent
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement, Noncurrent
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement, Noncurrent
Amount Offset, noncurrent
Derivative Liability, Fair Value, Gross Asset and Right to Reclaim Cash, Offset, Noncurrent
Derivative Liability, Fair Value, Gross Asset and Right to Reclaim Cash, Offset, Noncurrent
Derivative Liability, noncurrent
Derivative Liability, Noncurrent
Net derivative position
Derivative, Fair Value, Net
Disposal Group Name [Axis]
Disposal Group Name [Axis]
Disposal Groups, Including Discontinued Operations, Name [Domain]
Disposal Groups, Including Discontinued Operations, Name [Domain]
Dalhart Basin Acreage
Dalhart Basin Acreage [Member]
Dalhart Basin Acreage [Member]
Producing Property
Disposal Group, Including Discontinued Operation, Producing Property
Disposal Group, Including Discontinued Operation, Producing Property
Total revenues from discontinued operations
Disposal Group, Including Discontinued Operation, Consideration
Quarterly Financial Information Disclosure [Abstract]
Supplemental quarterly financial data (unaudited)
Quarterly Financial Information [Text Block]
Proved Developed and Undeveloped Oil and Gas Reserve Quantities [Table]
Proved Developed and Undeveloped Oil and Gas Reserve Quantities [Table]
Natural Gas (MMcf)
Cause Of Revision In Proved And Unproved Reserves [Axis]
Cause Of Revision In Proved And Unproved Reserves [Axis]
Cause Of Revision In Proved And Unproved Reserves [Axis]
Cause Of Revision In Proved And Unproved Reserves [Domain]
Cause Of Revision In Proved And Unproved Reserves [Domain]
[Domain] for Cause Of Revision In Proved And Unproved Reserves [Axis]
Performance, Pricing and Other Changes
Performance, Pricing and Other Changes [Member]
Performance, Pricing and Other Changes [Member]
Drilling of New Wells
Drilling of New Wells [Member]
Drilling of New Wells [Member]
Proved Undeveloped Properties
Proved Undeveloped Properties [Member]
Represents the information pertaining to undeveloped property that has been found to have proven oil and gas reserves.
Petroleum Reserves [Axis]
Petroleum Reserves [Axis]
Type of Reserve [Domain]
Type of Reserve [Domain]
Oil (MBbls)
Oil [Member]
Permian Basin And Granite Wash
Permian Basin And Granite Wash [Member]
Permian Basin And Granite Wash [Member]
Permian Basin play
Permian Basin Play [Member]
Represents the Permian Basin play acquisitions in producing properties.
Anadarko Granite Wash play
Anadarko Granite Wash Play [Member]
Represents the Anadarko Granite Wash play acquisitions in producing properties.
Net proved oil and natural gas reserves
Reserve Quantities [Line Items]
Proved developed and undeveloped reserves:
Proved Developed and Undeveloped Reserve (Energy) [Roll Forward]
Beginning of year
Proved Developed and Undeveloped Reserves, Net
Beginning of year (MBOE)
Proved Developed and Undeveloped Reserve, Net (Energy)
Revisions of previous estimates
Proved Developed and Undeveloped Reserves, Revisions of Previous Estimates
Revisions (Provisions) of previous estimates (MBOE)
Proved Developed and Undeveloped Reserve, Revision of Previous Estimate (Energy)
Extensions, discoveries and other additions
Proved Developed and Undeveloped Reserves, Extensions, Discoveries, and Additions
Extensions, discoveries and other additions (MBOE)
Proved Developed and Undeveloped Reserve, Extensions, Discoveries, and Additions (Energy)
Proved Developed and Undeveloped Reserve, Extensions, Discoveries, and Additions (Energy)
Purchases of reserves in place
Proved Developed and Undeveloped Reserves, Purchases of Minerals in Place
Purchases of reserves in place (MBOE)
Proved Developed and Undeveloped Reserve, Purchase of Mineral in Place (Energy)
Sales of reserves in place
Proved Developed and Undeveloped Reserves, Sales of Minerals in Place
Sales of reserves in place (MBOE)
Proved Developed and Undeveloped Reserves, Sale of Mineral in Place (Energy)
Production
Proved Developed and Undeveloped Reserves, Production
Production (MBOE)
Proved Developed and Undeveloped Reserve, Production (Energy)
End of year (MBOE)
End of year
Proved developed reserves:
Proved Developed Reserves [Roll Forward]
Beginning of year (volume)
Proved Developed Reserves (Volume)
Beginning of year (energy)
Proved Developed Reserves (Energy)
End of year (volume)
End of year (energy)
Proved undeveloped reserves:
Proved Undeveloped Reserves [Roll Forward]
Beginning of year (volume)
Proved Undeveloped Reserve (Volume)
Beginning of year (energy)
Proved Undeveloped Reserves (Energy)
End of year (volume)
End of year (energy)
Percentage of proved reserves estimated by independent reserve engineers
Percentage of Proved Reserves Estimated by Independent Reserve Engineers
Represents the percentage of proved reserves as estimated by independent reserve engineers.
Full cost method of accounting for investments in oil and gas properties, unweighted arithmetic average rate
Full Cost Method of Accounting for Investments in Oil and Gas Properties, Unweighted Arithmetic Average Rate
Full Cost Method of Accounting for Investments in Oil and Gas Properties, Unweighted Arithmetic Average First Of The Month Price Used In The Calculation Of The Full Cost Ceiling Value
Number of proved and undeveloped locations removed
Number of Proved and Undeveloped Locations Removed
Number of Proved and Undeveloped Locations Removed
Number of proved undeveloped locations redetermined
Number of Proved Undeveloped Locations Redetermined
Number of Proved Undeveloped Locations Redetermined
Number of locations in new proved undeveloped locations
Number of Locations in New Proved Undeveloped Locations
Represents the number of locations in new proved undeveloped locations.
Change in accrued capital expenditures
Capital Expenditures Incurred but Not yet Paid
Change in accrued capital contribution to equity method investee
Change in Gas Gathering, Transportation, Marketing and Processing Costs, Related Party Commitments
Change in Gas Gathering, Transportation, Marketing and Processing Costs, Related Party Commitments
Capitalized asset retirement cost
Capitalized Asset Retirement Cost
Capitalized asset retirement cost
Capitalized stock-based compensation
Equity issued in connection with acquisition
Stock Issued
Statement of Stockholders' Equity [Abstract]
Statement [Table]
Statement [Table]
Equity Components [Axis]
Equity Components [Axis]
Equity Component [Domain]
Equity Component [Domain]
Common Stock
Common Stock [Member]
Additional paid-in capital
Additional Paid-in Capital [Member]
Treasury Stock (at cost)
Treasury Stock [Member]
Accumulated deficit
Retained Earnings [Member]
Statement [Line Items]
Statement [Line Items]
Increase (Decrease) in Stockholders' Equity
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at beginning of year (in shares)
Shares, Issued
Balance at beginning of year
Restricted stock awards (in shares)
Stock Issued During Period, Shares, Restricted Stock Award, Gross
Restricted stock awards
Stock Issued During Period, Value, Restricted Stock Award, Gross
Restricted stock forfeitures (in shares)
Stock Issued During Period, Shares, Restricted Stock Award, Forfeited
Restricted stock forfeitures
Stock Issued During Period, Value, Restricted Stock Award, Forfeitures
Vested restricted stock exchanged for tax withholding (in shares)
Shares Paid for Tax Withholding for Share Based Compensation
Vested restricted stock exchanged for tax withholding
Adjustments Related to Tax Withholding for Share-based Compensation
Retirement of treasury stock (in shares)
Treasury Stock, Shares, Retired
Retirement of treasury stock
Treasury Stock, Retired, Cost Method, Amount
Exercise of employee stock options (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period
Exercise of employee stock options
Stock Issued During Period, Value, Stock Options Exercised
Equity issuance, net of offering costs (in shares)
Stock Issued During Period, Shares, New Issues
Equity issuance, net of offering costs
Stock Issued During Period, Value, New Issues
Equity issued for acquisition, net of offering costs
Stock Issued During Period, Value, Acquisitions
Stock-based compensation
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition
Balance at end of year (in shares)
Balance at end of year
Standardized measure of discounted future net cash flows relating to proved oil and natural gas reserves
Standardized Measure of Discounted Future Net Cash Flows Relating to Proved Oil and Gas Reserves [Abstract]
Future cash inflows
Future Net Cash Flows Relating to Proved Oil and Gas Reserves, Cash Inflows
Future production costs
Future Net Cash Flows Relating to Proved Oil and Gas Reserves, Production Costs
Future development costs
Future Net Cash Flows Relating to Proved Oil and Gas Reserves, Development Costs
Future income tax expenses
Future Net Cash Flows Relating to Proved Oil and Gas Reserves, Income Tax Expense
Future net cash flows
Future Net Cash Flows Relating to Proved Oil and Gas Reserves, Net Cash Flows
10% discount for estimated timing of cash flows
Future Net Cash Flows Relating to Proved Oil and Gas Reserves, Ten Percent Annual Discount for Estimated Timing of Cash Flows
Standardized measure of discounted future net cash flows
Standardized Measure of Discounted Future Net Cash Flows Relating to Proved Oil and Gas Reserves
Standardized measure of discounted future net cash flows relating to proved oil and natural gas reserves
Increase (Decrease) in Standardized Measure of Discounted Future Net Cash Flow Relating to Proved Oil and Gas Reserves [Roll Forward]
Standardized measure of discounted future net cash flows, beginning of year
Changes in the year resulting from:
Increase (Decrease) in Standardized Measure of Discounted Future Net Cash Flow Relating to Proved Oil and Gas Reserves [Abstract]
Sales, less production costs
Sales and Transfers of Oil and Gas Produced, Net of Production Costs
Revisions of previous quantity estimates
Revisions of Previous Quantity Estimates
Extensions, discoveries and other additions
Extensions, Discoveries, Additions and Improved Recovery, Less Related Costs
Net change in prices and production costs
Net Increase (Decrease) in Sales and Transfer Prices and Production Costs
Changes in estimated future development costs
Changes in Estimated Future Development Costs
Previously estimated development costs incurred during the period
Previously Estimated Development Costs Incurred During Period
Purchases of reserves in place
Increase Due to Purchases of Minerals in Place
Divestitures of reserves in place
Decrease Due to Sales of Minerals in Place
Accretion of discount
Accretion of Discount
Net change in income taxes
Changes in Future Income Tax Expense Estimates on Future Cash Flows Related to Proved Oil and Gas Reserves
Timing differences and other
Changes Due to Timing Differences and Other
Changes in the timing differences and others of discounted future net cash flows relating to proved oil and gas reserves.
Standardized measure of discounted future net cash flows, end of year
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Vested (in shares)
Cash paid for performance units (in dollars per share)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Cash Paid per Unit
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Cash Paid per Unit
Income tax expense computed by applying the statutory rate
Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount
State income tax, net of federal tax benefit and increase in valuation allowance
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount
Non-deductible stock-based compensation
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Compensation Cost, Amount
Stock-based compensation tax deficiency
Income Tax Reconciliation Stock-Based Compensation Tax Deficiency
The amount by which the tax deduction for share-based compensation awards is less than the expense previously recognized for book purposes. The value is recognized in expense as the reporting entity had not previously recognized excess tax benefits for these awards.
Change in deferred tax valuation allowance
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount
Other items
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount
Income tax expense
Property acquisition costs:
Costs Incurred, Acquisition of Oil and Gas Properties [Abstract]
Evaluated
Costs Incurred, Acquisition of Oil and Gas Properties with Proved Reserves
Unevaluated
Costs Incurred, Acquisition of Unproved Oil and Gas Properties
Exploration
Costs Incurred, Exploration Costs
Development costs
Costs Incurred, Development Costs
Total costs incurred
Costs Incurred, Oil and Gas Property Acquisition, Exploration, and Development Activities
Asset retirement obligations
Costs Incurred, Asset Retirement Obligation Incurred
Schedule of components of accounts receivable
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]
Schedule of components of other current liabilities
Other Current Liabilities [Table Text Block]
Schedule of pipeline and gathering assets
Property, Plant and Equipment [Table Text Block]
Schedule of future amortization expense of deferred loan costs
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Table Text Block]
Schedule of reconciliation of asset retirement obligations liability
Schedule of Change in Asset Retirement Obligation [Table Text Block]
Schedule of Fees Received from Operation of Jointly Owned Oil and Natural Gas Properties [Table Text Block]
JointInterestExpenseReimbursement [Table Text Block]
[Table Text Block] for Disclosure of fees received for the operation of jointly-owned oil and natural gas properties
Schedule of Cash Flow, Supplemental Disclosures
Schedule of Cash Flow, Supplemental Disclosures [Table Text Block]
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative [Table]
Derivative [Table]
Hedging Designation [Axis]
Hedging Designation [Axis]
Hedging Designation [Domain]
Hedging Designation [Domain]
Derivatives not designated as hedges
Not Designated as Hedging Instrument [Member]
Interest rate swap
Interest Rate Swap [Member]
Interest rate cap
Interest Rate Cap [Member]
Interest rate derivatives
Interest Rate Contract [Member]
Derivative [Line Items]
Derivative [Line Items]
Derivative, Number of Instruments Held
Derivative, Number of Instruments Held
Number of Interest Rate Derivatives Held
Number of Interest Rate Derivatives Held
Notional amount of derivatives
Derivative, Notional Amount
Derivative, Fixed Interest Rate
Derivative, Fixed Interest Rate
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table]
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Net income (numerator):
Net Income (Loss) Available to Common Stockholders, Basic [Abstract]
Income from continuing operations—basic and diluted
Income (Loss) from Continuing Operations Attributable to Parent
Income (loss) from discontinued operations, net of tax—basic and diluted
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent
Net income—basic and diluted
Weighted-average common shares outstanding (denominator):
Weighted Average Number of Shares Outstanding, Diluted [Abstract]
Weighted-average common shares outstanding—basic
Weighted Average Number of Shares Outstanding, Basic
Non-vested restricted stock awards
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements
Weighted-average common shares outstanding—diluted
Weighted Average Number of Shares Outstanding, Diluted
Net income per share:
Earnings Per Share, Basic and Diluted, Other Disclosures [Abstract]
Income from continuing operations - basic
Income (Loss) from Continuing Operations, Per Basic Share
Income from discontinued operations, net of tax - basic
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share
Net income per share-Basic
Earnings Per Share, Basic
Income from continuing operations - diluted
Income (Loss) from Continuing Operations, Per Diluted Share
Income from discontinued operations, net of tax - diluted
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share
Net income per share-Diluted
Earnings Per Share, Diluted
February 27, 2014
February 27, 2014 [Member]
February 27, 2014 [Member]
Restricted stock option awards
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding at the beginning of the period (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number
Granted (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross
Forfeited (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period
Exercised (in shares)
Expired or canceled (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period
Outstanding at the end of the period (in shares)
Vested (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number
Vested, exercisable, and expected to vest at end of period (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Number
Weighted-average exercise price (per option)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Outstanding at the end of the period (in dollars per share)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price
Granted (in dollars per share)
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price
Exercised (in dollars per share)
Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price
Expired or canceled (in dollars per share)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period, Weighted Average Exercise Price
Forfeited (in dollars per share)
Share-based Compensation Arrangements by Share-based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price
Outstanding at end of the period (in dollars per share)
Vested and exercisable at end of period (in dollars per share)
Vested, exercisable, and expected to vest at end of period (in dollars per share)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price
Weighted average contractual term
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Granted
Share Based Compensation Arrangement by Share Based Payment Award Options Grants in Period Weighted Average Remaining Contractual Term
Weighted-average remaining contractual term for option awards granted during the period, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.
Forfeited
Share Based Compensation Arrangement by Share Based Payment Award Options Forfeited Weighted Average Remaining Contractual Term
Weighted-average remaining contractual term for option awards forfeited during the period.
Exercised
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercised, Weighted Average Remaining Contractual Term
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercised, Weighted Average Remaining Contractual Term
Outstanding at the end of the period
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term
Vested and exercisable at the end of the period
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term
Vested, exercisable, and expected to vest at end of period
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Weighted Average Remaining Contractual Term
Assumptions used to estimate the fair value of options granted
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Expected option life
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term
Fair value per option (in dollars per share)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Aggregate Intrinsic Value
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Aggregate Intrinsic Value
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Aggregate Intrinsic Value
Unrecognized stock-based compensation expense
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options
Schedule of income tax (expense) benefit
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]
Comprehensive Provision For Income Taxes Including Discontinued Operations
Comprehensive Provision For Income Taxes Including Discontinued Operations [Table Text Block]
Comprehensive Provision For Income Taxes Including Discontinued Operations [Table Text Block]
Schedule of reconciliation of income tax (expense) benefit computed by applying the federal income tax rate of 34% to pre-tax income from operations
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]
Schedule of Income Tax Deficiency from Share-based Compensation
Schedule of Income Tax Deficiency from Share-based Compensation [Table Text Block]
Schedule of Income Tax Deficiency from Share-based Compensation [Table Text Block]
Schedule of Deferred Tax Assets and Liabilities
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]
Summary of Operating Loss Carryforwards
Summary of Operating Loss Carryforwards [Table Text Block]
Schedule of 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]
Midstream Service Assets
Midstream Service Assets [Member]
Midstream Service Assets [Member]
Other fixed assets
Other Capitalized Property Plant and Equipment [Member]
OtherCapitalizedPropertyAndEquipmentExcludingLand [Member]
OtherCapitalizedPropertyAndEquipmentExcludingLand [Member]
OtherCapitalizedPropertyAndEquipmentExcludingLand [Member]
Computer hardware and software
Computer Hardware and Software [Member]
Represents long lived, depreciable assets that are used in the creation, maintenance and utilization of information systems. Also includes purchased software applications.
Leasehold improvements
Leasehold Improvements [Member]
Aircraft
Air Transportation Equipment [Member]
Production equipment
Exploration and Production Equipment [Member]
Furniture and fixtures
Furniture and Fixtures [Member]
Other
Property, Plant and Equipment, Other Types [Member]
Vehicles
Vehicles [Member]
Land
Land [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment [Line Items]
Oil and natural gas properties
Oil and Gas Property [Abstract]
Unevaluated properties not being amortized
Accumulated depletion
Oil and Gas Property, Full Cost Method, Depletion
Depletion expense
Depletion of Oil and Gas Properties
Depletion rate per BOE (in dollars per BOE)
Amortization Expense Per Physical Unit of Production
Discount rate used in calculating full cost ceiling (in percent)
Discount Rate Full Cost Ceiling
Discount Rate Full Cost Ceiling
Pipeline and other gas gathering assets and other fixed assets
Property, Plant and Equipment [Abstract]
Property, plant and equipment, useful life (in years)
Property, Plant and Equipment, Useful Life
Depreciation, depletion and amortization
Depreciation, Depletion and Amortization
Midstream service assets
Midstream Service Assets
Midstream Service Assets pertaining to both oil and gas
Less accumulated depreciation
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment
Total, net
Property, Plant and Equipment, Net
Other fixed assets
Property, Plant and Equipment, Other, Gross
Schedule of minimum annual lease commitments
Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]
Schedule of rent expense
Schedule of Rent Expense [Table Text Block]
Deferred income tax stock based compensation tax deficiency
Deferred Income Tax Stock Based Compensation Tax Deficiency
The amount of income tax expense recorded during the period for a tax deficiency associated with a share-based compensation plan. This amount was not recorded in additional paid in capital because the reporting entity has a valuation allowance related to its net operating loss carryforwards.
Schedule of calculation of basic and diluted weighted average shares outstanding and net income per share
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
Basis of presentation and significant accounting policies
Basis of Presentation and Significant Accounting Policies [Text Block]
Derivative financial instruments
Derivative Instruments and Hedging Activities Disclosure [Text Block]
Operating Loss Carryforwards [Table]
Operating Loss Carryforwards [Table]
Tax Period [Axis]
Tax Period [Axis]
Tax Period [Domain]
Tax Period [Domain]
2026
Tax Year 2026 [Member]
Tax Year 2026
2027
Tax Year 2027 [Member]
Tax Year 2027
2028
Tax Year 2028 [Member]
Tax Year 2028
2029
Tax Year 2029 [Member]
Tax Year 2029
2030
Tax Year 2030 [Member]
Tax Year 2030
Thereafter
Tax Year Thereafter [Member]
Tax Year Thereafter [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards, Expiration Date
Operating Loss Carryforwards, Expiration Date
Derivative Instruments, Gain (Loss) [Table]
Derivative Instruments, Gain (Loss) [Table]
Commodity derivatives
Commodity Contract [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) [Line Items]
Cash settlements received (paid) for matured derivatives, net
Cash settlements received for derivatives, net
Derivative, Gain (Loss) on Derivative, Net
Acquisitions and divestitures
Acquisition and Divestiture Disclosure [Text Block] [Text Block]
Disclosure of acquisition and divestiture of oil and gas properties, including those accounted for as a business combination and as an acquisition of assets.
February 2013 Awards
February Two Thousand Thirteen Awards [Member]
February Two Thousand Thirteen Awards [Member]
February 2012 Awards
February Two Thousand Twelve Awards [Member]
February Two Thousand Twelve Awards [Member]
February 2014 Awards
February 2014 Awards [Member]
February 2014 Awards [Member]
Antidilutive Securities [Axis]
Antidilutive Securities [Axis]
Antidilutive Securities, Name [Domain]
Antidilutive Securities, Name [Domain]
Antidilutive securities excluded from computation of earnings per share(in shares)
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount
Options outstanding weighted average exercise price (in dollars per shares)
Stock issued during the period (in shares)
Quarterly Financial Data [Abstract]
Quarterly Financial Data [Abstract]
Revenues
Revenue, Net
Operating income
Operating Income (Loss)
Net income (loss) per common share:
Basic (in dollars per share)
Diluted (in dollars per share)
Schedule of Impaired Long-Lived Assets Held and Used [Table]
Schedule of Impaired Long-Lived Assets Held and Used [Table]
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]
Materials and Supplies
Materials and Supplies [Member]
Materials and Supplies [Member]
Line-fill
Line-fill [Member]
Line-fill [Member]
Impaired Long-Lived Assets Held and Used [Line Items]
Impaired Long-Lived Assets Held and Used [Line Items]
Materials and supplies
Inventory, Raw Materials and Supplies, Gross [Abstract]
Write-down of materials and supplies
Inventory Write-down
Unrecognized Tax Benefits
Unrecognized Tax Benefits
Supplemental Cash Flow Information
Supplemental Cash Flow Information [Abstract]
Cash paid for interest, net of $150, $255 and $627 of capitalized interest, respectively
Interest Paid, Net
Capitalized interest
Interest Paid, Capitalized
Income Statement [Abstract]
Revenues:
Revenue, Net [Abstract]
Midstream service revenue
Gas Gathering, Transportation, Marketing and Processing Revenue
Sales of purchased oil
Revenue from Purchased Oil and Gas
Total revenues
Costs and expenses:
Costs and Expenses [Abstract]
Midstream service expense
Gas Gathering, Transportation, Marketing and Processing Costs, Excluding Costs of Purchased Oil
Gas Gathering, Transportation, Marketing and Processing Costs, Excluding Costs of Purchased Oil
Natural gas volume commitment - affiliates
Gas Gathering, Transportation, Marketing and Processing Costs, Related Party
Gas Gathering, Transportation, Marketing and Processing Costs, Related Party
Costs of purchased oil
Cost of Purchased Oil and Gas
General and administrative
General and Administrative Expense
Depletion, depreciation and amortization
Impairment expense
Total costs and expenses
Costs and Expenses
Operating income
Non-operating income (expense):
Nonoperating Income (Expense) [Abstract]
Gain (loss) on derivatives:
Nonoperating Gains (Losses) [Abstract]
Commodity derivatives, net
Gain (Loss) on Price Risk Derivative Instruments Not Designated as Hedging Instruments
Interest rate derivatives, net
Gain (Loss) on Interest Rate Derivative Instruments Not Designated as Hedging Instruments
Income (loss) from equity method investee
Income (Loss) from Equity Method Investments
Interest expense
Interest and other income
Interest and Other Income
Write-off of debt issuance costs
Loss on disposal of assets, net
Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property
Non-operating income (expense), net
Nonoperating Income (Expense)
Income from continuing operations before income taxes
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest
Income tax expense:
Income Tax Expense (Benefit) 1 [Abstract]
Income Tax Expense (Benefit) 1 [Abstract]
Deferred
Income from continuing operations
Income (loss) from discontinued operations, net of tax
Net income
Basic net income per share
Income from continuing operations
Income (loss) from discontinued operations, net of tax
Diluted net income per share
Earnings Per Share, Diluted [Abstract]
Income from continuing operations
Income (loss) from discontinued operations, net of tax
Weighted average common shares outstanding:
Basic (in shares)
Diluted (in shares)
Schedule of Equity Method Investments [Table]
Schedule of Equity Method Investments [Table]
Schedule of Equity Method Investments [Line Items]
Schedule of Equity Method Investments [Line Items]
Investment in equity method investee
Ownership Percentage
Equity Method Investment, Ownership Percentage
Equity Method Investment Ownership Percentage Held By Investment Partner
Equity Method Investment Ownership Percentage Held By Investment Partner
Equity Method Investment Ownership Percentage Held By Investment Partner
Variable Interest Entity Super Majority Voting Percentag Required For Key Decisions
Variable Interest Entity Super Majority Voting Percentag Required For Key Decisions
Variable Interest Entity Super Majority Voting Percentag Required For Key Decisions
Other Commitment
Other Commitment
Capital Contribution payable related to cash requirements of project
Due to Related Parties, Capital Contribution Payable
Due to Related Parties, Capital Contribution Payable
Minimum volume commitment payable
Due To Related Parties, Minimum Volume Commitment Payable
Due To Related Parties, Minimum Volume Commitment Payable
Subsidiary guarantees
Condensed Financial Statements [Text Block]
Income Taxes
Income Tax Disclosure [Text Block]
Schedule of costs incurred in the acquisition, exploration and development of oil and natural gas assets
Cost Incurred in Oil and Gas Property Acquisition, Exploration, and Development Activities Disclosure [Table Text Block]
Schedule of aggregate capitalized costs related to oil and natural gas production activities with applicable accumulated depletion, depreciation and impairment
Capitalized Costs Relating to Oil and Gas Producing Activities Disclosure [Table Text Block]
Summary of oil and natural gas property costs not being amortized by year
Schedule of Capitalized Costs of Unproved Properties Excluded from Amortization [Table Text Block]
Summary of results of oil and natural gas producing activities (excluding corporate overhead and interest costs)
Results of Operations for Oil and Gas Producing Activities Disclosure [Table Text Block]
Schedule of analysis of change in estimated quantities of oil and natural gas reseves located within United States
Schedule of Proved Developed and Undeveloped Oil and Gas Reserve Quantities [Table Text Block]
Standardized measure of discounted future net cash flows relating to proved oil and natural gas reserves
Standardized Measure of Discounted Future Cash Flows Relating to Proved Reserves Disclosure [Table Text Block]
Schedule of changes in standardized measure of discounted future net cash flows relating to proved oil and natural gas reserves
Schedule of Changes in Standardized Measure of Discounted Future Net Cash Flows [Table Text Block]
Equity [Abstract]
Follow-on Offering
Stockholders' Equity Note Disclosure [Text Block]
Oil and Gas Properties
Oil and Gas Properties [Member]
Counterparty Name [Axis]
Counterparty Name [Axis]
Counterparty Name [Domain]
Counterparty Name [Domain]
EnerVest
EnerVest [Member]
EnerVest [Member]
Other Third Parties
Other Third Parties [Member]
Other Third Parties [Member]
Andarko Basin
Andarko Basin [Member]
Andarko Basin [Member]
Proceeds from sale of oil and gas property and equipment, gross
ProceedsFromSaleofOilandGasPropertyAndEquipmentGross
The gross cash inflow to dispose of long-lived, physical assets and mineral interests in oil and gas properties used for normal oil and gas operations.
Decrease in oil and gas property full cost
Decreaseinoilandgaspropertyfullcost
Decrease in the oil and gas properties accounted for using the full cost method.
Consideration net of transaction costs
Proceeds from Sale of Oil and Gas Property and Equipment
Gain (Loss) on disposal of assets
Revenues
Disposal Group, Including Discontinued Operation, Revenue
Expenses
Disposal Group, Including Discontinued Operation, Operating Expense
Revenues:
Revenues discontinued operations [Abstract]
Revenues discontinued operations [Abstract]
Midstream service revenue
Disposal Groups Midstream Service Revenue
Disposal Groups Midstream Service Revenue
Total revenues from discontinued operations
Cost and expenses:
Cost and expenses discontinued operations [Abstract]
Cost and expenses discontinued operations [Abstract]
Midstream service expense, net
Disposal Groups Midstream Service Costs
Disposal Groups Midstream Service Costs
Depreciation and amortization
Disposal Group, Including Discontinued Operation, Depreciation Depletion and Amortization
Disposal Group, Including Discontinued Operation, Depreciation Depletion and Amortization
Total costs and expenses from discontinued operations
Disposal Groups Discontinued Operations Costs And Expenses Amount
Disposal Groups Discontinued Operations Costs And Expenses Amount
Non-operating expense, net
Disposal Group, Including Discontinued Operation, Non-Operating Expense (Income)
Disposal Group, Including Discontinued Operation, Non-Operating Expense (Income)
Income (loss) from discontinued operations before income tax
Discontinued Operation, Income (Loss) from Discontinued Operation During Phase-out Period, before Income Tax
Income tax (expense) benefit
Discontinued Operation, Tax Effect of Income (Loss) from Discontinued Operation During Phase-out Period
Income (loss) from discontinued operations
Discontinued Operation, Income (Loss) from Discontinued Operation During Phase-out Period, Net of Tax
Schedule of derivative contracts transferred to buyers on sale of assets
Derivatives Transferred on Sale of Assets [Table Text Block]
Derivatives Transferred on Sale of Assets [Table Text Block]
Summary of derivative contracts unwound in connection with sale of assets
Schedule of Derivative Instruments Unwound on Sale of Assets [Table Text Block]
Schedule of Derivative Instruments Unwound on Sale of Assets [Table Text Block]
Schedule of gains and losses on derivative instruments
Schedule of Derivative Instruments Cash Settlements And Payments [Text Block]
Tabular disclosure of the cash settlements and payments for derivative instruments during the period.
Schedule of Notional Amounts of Outstanding Derivative Positions
Schedule of Notional Amounts of Outstanding Derivative Positions [Table Text Block]
Deferred loan costs
Deferred Finance Costs [Abstract]
Payments of Loan Costs
Debt issuance cost, net
Deferred Finance Costs, Noncurrent, Net
Accumulated amortization
Accumulated Amortization of Noncurrent Deferred Finance Costs
Future amortization expense of deferred loan costs
Deferred Finance Costs Future Amortization Expense [Abstract]
2015
Deferred Finance Costs Amortization Expense Next Twelve Months
Amount of amortization expense expected to be recognized during the next fiscal year following the latest fiscal year for deferred finance costs.
2016
Deferred Finance Costs Amortization Expense Year Two
Amount of amortization expense expected to be recognized during the second fiscal year following the latest fiscal year for deferred finance costs.
2017
Deferred Finance Costs Amortization Expense Year Three
Amount of amortization expense expected to be recognized during the third fiscal year following the latest fiscal year for deferred finance costs.
2018
Deferred Finance Costs Amortization Expense Year Four
Amount of amortization expense expected to be recognized during the fourth fiscal year following the latest fiscal year for deferred finance costs.
2019
Deferred Finance Costs Amortization Expense Year Five
Amount of amortization expense expected to be recognized in the fifth fiscal year following the latest fiscal year for deferred finance costs.
Thereafter
Deferred Finance Costs Amortization Expense After Year Five
Amount of amortization expense expected to be recognized after the fifth fiscal year following the latest fiscal year for deferred finance costs.
Total
Asset retirement obligations
Asset Retirement Obligation [Abstract]
Reconciliation of asset retirement obligations liability
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Liability at beginning of year
Asset Retirement Obligation
Liabilities added due to acquisitions, drilling, midstream service asset construction and other
Asset Retirement Obligation, Liabilities Incurred
Accretion expense
Liabilities settled upon plugging and abandonment
Asset Retirement Obligation Settled upon Plugging and Abandonment
Amount of asset retirement obligations settled upon plugging and abandonment.
Liabilities removed due to sale of property
Asset Retirement Obligation, Liabilities Settled
Revision of estimates
Asset Retirement Obligation, Revision of Estimate
Liability at end of year
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Table]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Table]
Deferred Premiums
Deferred Premiums [Member]
Represents information pertaining to deferred premiums.
Asset (Liability) Class [Axis]
Asset (Liability) Class [Axis]
Asset (Liability) Class [Axis]
Fair Value by Liability Class [Domain]
Fair Value by Liability Class [Domain]
Deferred Premium Asset (Liability)
Deferred Premium Asset (Liability) [Member]
Deferred Premium Asset (Liability) [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Derivative Financial Instrument, Deferred Premium, Future Payments Due, Fiscal Year Maturity [Abstract]
Derivative Financial Instrument, Deferred Premium, Future Payments Due, Fiscal Year Maturity [Abstract]
Derivative Financial Instrument, Deferred Premium, Future Payments Due, Fiscal Year Maturity
2015
Derivative Financial Instrument, Deferred Premium, Future Payments Due, Next Twelve Months
Derivative Financial Instrument, Deferred Premium, Future Payments Due, Next Twelve Months
2016
Derivative Financial Instrument, Deferred Premium, Future Payments Due, Due in Two Years
Derivative Financial Instrument, Deferred Premium, Future Payments Due, Due in Two Years
2017
Derivative Financial Instrument, Deferred Premium, Future Payments Due, Due in Three Years
Derivative Financial Instrument, Deferred Premium, Future Payments Due, Due in Three Years
2018
Derivative Financial Instrument Deferred Premium Future Payments Due in Four Years
Derivative Financial Instrument, Deferred Premium, Future Payments Due, Due in Four Years
Total
Derivative Financial Instrument, Deferred Premium, Future Payments Due
Derivative Financial Instrument, Deferred Premium, Future Payments Due
Changes in assets classified as Level 3 measurements
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance of Level 3 at beginning of period
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs
Change in net present value of deferred premiums for derivatives
Total purchases and settlements:
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases, (Sales), Issuances, (Settlements) [Abstract]
Purchases
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases
Settlements(1)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Settlements
Balance of Level 3 at end of period
Basis of presentation
Basis of Accounting, Policy [Policy Text Block]
Use of estimates in the preparation of interim consolidated financial statements
Use of Estimates, Policy [Policy Text Block]
Reclassifications
Reclassification, Policy [Policy Text Block]
Cash and cash equivalents
Cash and Cash Equivalents, Policy [Policy Text Block]
Accounts receivable
Trade and Other Accounts Receivable, Policy [Policy Text Block]
Derivative financial instruments
Derivatives, Policy [Policy Text Block]
Oil and natural gas properties
Oil and Gas Properties Policy [Policy Text Block]
Midstream service assets
Midstream Service Assets [Policy Text Block]
Disclosure of accounting policy related to midstream service assets.
Other fixed assets
Other Fixed Assets [Policy Text Block]
Disclosure of accounting policy related to other fixed assets.
Environmental laws and regulations
Environmental Costs, Policy [Policy Text Block]
Debt issuance costs
Deferred Charges, Policy [Policy Text Block]
Asset retirement obligations
Asset Retirement Obligations, Policy [Policy Text Block]
Fair value measurements
Fair Value Measurement, Policy [Policy Text Block]
Treasury stock
Stockholders' Equity, Policy [Policy Text Block]
Revenue recognition
Revenue Recognition, Policy [Policy Text Block]
General and administrative expense
Selling, General and Administrative Expenses, Policy [Policy Text Block]
Equity and stock-based awards
Share-based Compensation, Option and Incentive Plans Policy [Policy Text Block]
Income taxes
Income Tax, Policy [Policy Text Block]
Impairment of long-lived assets
Impairment or Disposal of Long-Lived Assets, Policy [Policy Text Block]
Variable Interest Entity
Consolidation, Variable Interest Entity, Policy [Policy Text Block]
Recently issued accounting standards
New Accounting Pronouncements, Policy [Policy Text Block]
Credit Risk
Concentration Risk, Credit Risk, Policy [Policy Text Block]
Compensation Related Costs
Compensation Related Costs, Policy [Policy Text Block]
Swap August 2013 - December 2013
Swap August 2013 - December 2013 [Member]
Swap August 2013 - December 2013 [Member]
Swap January 2014 - December 2014
Swap January 2014 - December 2014 [Member]
Swap January 2014 - December 2014 [Member]
Collar September 2013 - December 2013
Collar September 2013 - December 2013 [Member]
Collar September 2013 - December 2013 [Member]
Put September 2013 - December 2013
Put September 2013 - December 2013 [Member]
Put September 2013 - December 2013 [Member]
Collar January 2014 - December 2014
Collar January 2014 - December 2014 [Member]
Collar January 2014 - December 2014 [Member]
Collar 2 January 2014 - December 2014
Collar 2 January 2014 - December 2014 [Member]
Collar 2 January 2014 - December 2014 [Member]
Collar 3 January 2014 - December 2014
Collar 3 January 2014 - December 2014 [Member]
Collar 3 January 2014 - December 2014 [Member]
Collar 4 January 2014 - December 2014
Collar 4 January 2014 - December 2014 [Member]
Collar 4 January 2014 - December 2014 [Member]
Collar January 2015 - December 2015
Collar January 2015 - December 2015 [Member]
Collar January 2015 - December 2015 [Member]
Collar 2 January 2015 - December 2015
Collar 2 January 2015 - December 2015 [Member]
Collar 2 January 2015 - December 2015 [Member]
Collar 3 January 2015 - December 2015
Collar 3 January 2015 - December 2015 [Member]
Collar 3 January 2015 - December 2015 [Member]
Transaction Type [Axis]
Transaction Type [Axis]
Transaction [Domain]
Transaction [Domain]
Transferred On Divestiture
Transferred On Divestiture [Member]
Transferred On Divestiture [Member]
Unwound on Divestiture
Unwound on Divestiture [Member]
Unwound on Divestiture [Member]
Derivative, by Nature [Axis]
Derivative, by Nature [Axis]
Derivative, Name [Domain]
Derivative, Name [Domain]
Swaps
Swap [Member]
Collars
Collar [Member]
Contracts negotiated between two parties to purchase and sell a specific quantity of a financial instrument, foreign currency, or commodity at a specified market rate with a specified floor price and a specified cap price at a specified future date.
Put Option
Put Option [Member]
Aggregate volumes (in Bbls/MMBtu)
Derivative, Nonmonetary Notional Amount
Swap price (in dollars per unit)
Derivative, Swap Type, Fixed Price
Floor price (in dollars per unit)
Derivative, Floor Price
Ceiling price (in dollars per unit)
Derivative, Cap Price
Options Held
Options Held [Member]
Hedged volume (Bbl) - Year 2015
Derivative, Amount of Hedged Item, Volume, Year 1
Derivative, Amount of Hedged Item, Volume, Year 1
Hedged volume (Bbl) - Year 2016
Derivative, Amount of Hedged Item, Volume, Year 2
Derivative, Amount of Hedged Item, Volume, Year 2
Hedged volume (Bbl) - Year 2017
Derivative, Amount of Hedged Item, Volume, Year 3
Derivative, Amount of Hedged Item, Volume, Year 3
Weighted-average price ($/Bbl) - Year 2015
Underlying, Derivative Volume, Year 1
Underlying, Derivative Volume, Year 1
Weighted-average price ($/Bbl) - Year 2016
Underlying, Derivative Volume, Year 2
Underlying, Derivative Volume, Year 2
Weighted-average price ($/Bbl) - Year 2017
Underlying, Derivative Volume, Year 3
Underlying, Derivative Volume, Year 3
Weighted-average floor price ($/Bbl) - Year 2015
Derivative, Average Floor Price, Year 1
Derivative, Average Floor Price, Year 1
Weighted-average floor price ($/Bbl) - Year 2016
Derivative, Average Floor Price, Year 2
Derivative, Average Floor Price, Year 2
Weighted-average floor price ($/Bbl) - Year 2017
Derivative, Average Floor Price, Year 3
Derivative, Average Floor Price, Year 3
Weighted-average ceiling price ($/Bbl) - Year 2015
Derivative, Average Cap Price, Year 1
Derivative, Average Cap Price, Year 1
Weighted-average ceiling price ($/Bbl) - Year 2016
Derivative, Average Cap Price, Year 2
Derivative, Average Cap Price, Year 2
Weighted-average ceiling price ($/Bbl) - Year 2017
Derivative, Average Cap Price, Year 3
Derivative, Average Cap Price, Year 3
Total volume hedged with ceiling price (Bbl) - Year 2015
Derivative, Amount of Hedged Item, Volume, Ceiling, Year 1
Derivative, Amount of Hedged Item, Volume, Ceiling, Year 1
Total volume hedged with ceiling price (Bbl) - Year 2016
Derivative, Amount of Hedged Item, Volume, Ceiling, Year 2
Derivative, Amount of Hedged Item, Volume, Ceiling, Year 2
Total volume hedged with ceiling price (Bbl) - Year 2017
Derivative, Amount of Hedged Item, Volume, Ceiling, Year 3
Derivative, Amount of Hedged Item, Volume, Ceiling, Year 3
Total volume hedged with floor price (Bbl) - Year 2015
Derivative, Amount of Hedged Item, Volume, Floor, Year 1
Derivative, Amount of Hedged Item, Volume, Floor, Year 1
Total volume hedged with floor price (Bbl) - Year 2016
Derivative, Amount of Hedged Item, Volume, Floor, Year 2
Derivative, Amount of Hedged Item, Volume, Floor, Year 2
Total volume hedged with floor price (Bbl) - Year 2017
Derivative, Amount of Hedged Item, Volume, Floor, Year 3
Derivative, Amount of Hedged Item, Volume, Floor, Year 3
Hedged volume (MMBtu) - Year 2015
Derivative, Amount of Hedged Item, Energy, Year 1
Derivative, Amount of Hedged Item, Energy, Year 1
Hedged volume (MMBtu) - Year 2016
Derivative, Amount of Hedged Item, Energy, Year 2
Derivative, Amount of Hedged Item, Energy, Year 2
Hedged volume (MMBtu) - Year 2017
Derivative, Amount of Hedged Item, Energy, Year 3
Derivative, Amount of Hedged Item, Energy, Year 3
Assets
Assets [Abstract]
Current assets:
Assets, Current [Abstract]
Cash and cash equivalents
Accounts receivable, net
Derivatives
Deferred income taxes
Deferred Tax Assets, Net, Current
Other current assets
Other Assets, Current
Total current assets
Assets, Current
Property and equipment:
Property, Plant and Equipment, Net [Abstract]
Oil and natural gas properties, full cost method
Oil and Gas Properties Full Cost Method Gross [Abstract]
Evaluated properties
Midstream service assets
Pipeline and Gas Gathering Assets
Aggregate carrying amount, as of the balance sheet date, of pipeline and gas gathering assets that are expected to be realized or consumed after one year (or the normal operating cycle, if longer).
Total property and equipment
Property, Plant and Equipment, Gross
Less accumulated depletion, depreciation, amortization and impairment
Accumulated Depreciation Depletion Amortization and Impairment Property Plant and Equipment
The cumulative amount of depreciation, depletion, amortization and impairment (related to property, plant and equipment, but not including land) that has been recognized in the income statement.
Net property and equipment
Derivatives
Other assets, net
Other Assets, Noncurrent
Liabilities and stockholders' equity
Liabilities and Equity [Abstract]
Current liabilities:
Liabilities, Current [Abstract]
Undistributed revenue and royalties
Undistributed Revenue and Accrued Royalties, Current
Aggregate carrying value as of the balance sheet date of the liabilities for all undistributed revenue and royalties payable within one year (or the operating cycle, if longer).
Accrued capital expenditures
Accrued Capital Expenditures, Current
Aggregate carrying value as of the balance sheet date of the liabilities for all capital expenditures incurred and payable within one year (or the operating cycle, if longer).
Derivatives
Deferred income taxes
Deferred Tax Liabilities, Net, Current
Other current liabilities
Total current liabilities
Liabilities, Current
Derivatives
Deferred income taxes
Deferred Tax Liabilities, Net, Noncurrent
Asset retirement obligations
Asset Retirement Obligations, Noncurrent
Other noncurrent liabilities
Other Liabilities, Noncurrent
Total liabilities
Liabilities
Commitments and contingencies
Commitments and Contingencies
Stockholders' equity:
Stockholders' Equity Attributable to Parent [Abstract]
Preferred stock, $0.01 par value, 50,000,000 shares authorized and zero issued at December 31, 2014 and 2013
Preferred Stock, Value, Issued
Common stock, $0.01 par value, 450,000,000 shares authorized, and 143,686,491 and 142,671,436 issued, at December 31, 2014 and 2013, respectively
Common Stock, Value, Issued
Additional paid-in capital
Additional Paid in Capital, Common Stock
Retained earnings (accumulated deficit)
Retained Earnings (Accumulated Deficit)
Total stockholders' equity
Schedule of results of operations by quarter
Schedule of Quarterly Financial Information [Table Text Block]
Supplemental oil and natural gas disclosures
Full Cost Method of Accounting for Investments in Oil and Gas Properties Disclosure [Text Block]
Total operating revenues
Total operating costs and expenses
Income from operations
Interest expense, net
Interest Income (Expense), Net
Other, net
Other Nonoperating Income (Expense)
Income tax expense
Income from continuing operations
Basis Swap
Basis Swap [Member]
Collar January 2017 - December 2017
Collar January 2017 - December 2017 [Member]
Collar January 2017 - December 2017 [Member]
Basis Swap March 2015 - December 2015
Basis Swap March 2015 - December 2015 [Member]
Basis Swap March 2015 - December 2015 [Member]
Aggregate volumes (in MMBtu)
Deferred premium
Derivative, Deferred Premium
Derivative, Deferred Premium
Continuing operations
Discontinued operations
Discontinued Operation, Tax Effect of Discontinued Operation
Comprehensive provision for income taxes
Schedule of fair value hierarchy for assets and liabilities measured at fair value on a recurring basis
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]
Actual cash payments required for deferred premium contracts
Expected Cash Payments Required on Deferred Premium Contracts [Table Text Block]
Expected Cash Payments Required on Deferred Premium Contracts [Table Text Block]
Summary of changes in assets classified as Level 3 measurements
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]
Fair Value, by Balance Sheet Grouping [Table]
Fair Value, by Balance Sheet Grouping [Table]
Fair Value, by Balance Sheet Grouping, Disclosure Item Amounts [Axis]
Fair Value, Disclosure Item Amounts [Domain]
Carrying value
Reported Value Measurement [Member]
Fair value
2019 Notes
January 2022 Notes
Credit Facilities
Fair value of debt
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt
Debt Instrument, Fair Value Disclosure
Unamortized bond premium
Debt Instrument, Unamortized Premium
Schedule of Stock by Class [Table]
Schedule of Stock by Class [Table]
Class of Stock [Axis]
Class of Stock [Axis]
Class of Stock [Domain]
Class of Stock [Domain]
Class of Stock [Line Items]
Class of Stock [Line Items]
Sale of stock by existing shareholders (shares)
Sale of Stock By Existing Shareholders, Number of Shares
Sale of Stock By Existing Shareholders, Number of Shares
Shares issued (dollars per share)
Shares Issued, Price Per Share
Sale of stock, net of underwriting discount (dollars per share)
Sale of Stock Price Per Share Net Of Underwriting Discount
Sale of Stock Price Per Share Net Of Underwriting Discount
Proceeds from issuance of common stock
Commitments and contingencies
Commitments and Contingencies Disclosure [Text Block]