Stock Based Compensation Expense and Other
Stock-based compensation and other
The aggregate amount of noncash, equity-based employee remuneration and non-cash share-based compensation expense. This may include the value of stock options, amortization of restricted stock, and adjustments for officers compensation, as well as other non-cash expenses. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.
Deferred Compensation Plan [Abstract]
Deferred Compensation Plan
Discretionary Profit Sharing Contribution Plan [Abstract]
Discretionary profit sharing contribution Plan
Represents the deferred compensation plan of the entity.
Deferred compensation plan
Deferred Compensation Plan [Member]
Defined Benefit Plan Number of Retirees and Dependents
Number of retirees and their dependents to whom benefits under the plan are provided
Represents the number of retired employees, including their spouses, eligible dependents and surviving spouses (retirees), to whom Company provides benefits under the plan.
Number of non-financial assets and liabilities impaired
Represents the number of non-financial assets and liabilities that were impaired during the period.
Number of Non Financial Assets and Liabilities Impaired
Defined Benefit Plan Subsidy Limit Percentage of Expected Annual Fully Insured Premium Under Age Threshold
Subsidy limit which should not exceed aggregate annual amount
Represents the entity's subsidy limit which should not exceed aggregate annual amount.
Defined Benefit Plan Subsidy Limit Percentage of Annual Increase Under Age Threshold
Annual increase in subsidy limit (as a percent)
Represent the percentage of annual increase in subsidy limit.
Defined Benefit Plan Subsidy Limit Percentage of Expected Annual Fully Insured Premium Over Age Threshold
Percentage of the expected annual fully-insured premium by which subsidy is limited
Represents the entity's subsidy which is limited to the percentage of the expected annual fully-insured premium.
Share Based Compensation Arrangement by Share Based Payment Award, Percentage of Aggregate Distribution Paid Immediately
Percentage of the total distribution paid immediately
Represents the percentage of total distribution that will be paid immediately.
Amendment Description
Share Based Compensation Arrangement by Share Based Payment Award Percentage of Eligible Employees Base Salary to be Received by an Employee upon the Achievement of the Final Price Goal
Total percentage of salary eligible for final distribution if final trigger is achieved
Represents the percentage of base salary to be received by eligible employees upon achievement of the final trigger.
Amendment Flag
Defined Contribution Pension and Other Postretirement Plans Disclosure [Line Items]
Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.
Defined Contribution plans
Defined Contribution Plans [Axis]
Reflects the description and required disclosures pertaining to the entity's defined contribution by plan or groupings of similar plans.
Defined Contribution Plans [Domain]
The name of the defined contribution or a description of the plans grouped.
Document and Entity Information
Drilling advances
Drilling Advances Accounts Payable
Carrying Value as of the Balance Sheet date of payments received from joint interest partners for drilling activities in the future.
Environmental Loss, Aggregate Amount of Settlement Paid
Aggregate amount of settlement paid to and accepted by the appellants
Represents the aggregate amount of settlement paid as of the balance sheet date to affected households.
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]
Tabular disclosure of the fair value measurement of assets and liabilities using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes during the period attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets) and gains or losses recognized in other comprehensive income, and a description of where those gains or losses included in earnings (or changes in net assets or liabilities) are reported in the statement of income (or activities); (2) purchases, sales, issuances, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs), by class of asset or liability.
Fair Value of Financial Assets and Liabilities Classified as Level 3
Current ratio
Represents the ratio of current assets to current liabilities.
Debt Instrument Covenant Current Ratio
Debt Instrument Covenant Asset Coverage Ratio
Asset coverage ratio
Represents the required asset coverage ratio under the terms of the agreement.
Represents the required annual coverage ratio of operating cash flow to interest expense under the terms of the agreement.
Debt Instrument Covenant Annual Coverage Ratio
Annual coverage ratio
Five Point Five Eight Percentage Weighted Average Fixed Rate Notes [Member]
5.58% Weighted Average Fixed Rate Notes.
5.58% weighted-average fixed rate notes
5.58% Weighted Average Fixed Rate Notes
Number of Drilling Rig Commitments
Represents the number of drilling rig commitments entered into by the entity.
Number of drilling rig commitments
Aggregate Future Minimum Transportation Agreement Obligation
Future minimum obligations under transportation and gathering
Aggregate future minimum obligations for transportation agreements at the balance sheet date.
Gathering and Pipeline Systems
Gathering and pipeline systems
Carrying amount at the balance sheet date for gathering and pipeline assets used in the normal conduct of business and not intended for resale. Amount does not include depreciation.
Long lived, depreciable assets for gathering natural gas and pipeline systems and equipment.
Gathering and pipeline systems and equipment
Gathering and Pipeline Systems and Equipment [Member]
Disclosure about the achievement of the goal price during the period.
Goal Achievement Date [Domain]
Current Fiscal Year End Date
Award Type [Axis]
Payment Period [Domain]
The list of dates when distributions may be made.
Award Date [Axis]
Represents the Haynesville and Bossier Shale leaseholds in East Texas.
Haynesville/Bossier Shale Joint Ventures
Haynesville and Bossier Shale [Member]
Income Tax Reconciliation Deferred Tax Adjustment Related to Change in Overall State Tax Rate
Deferred tax adjustment related to change in overall state tax rate
The portion of the difference, between total income tax expense or benefit as reported in the income statement for the period and the expected income tax expense or benefit computed by applying the domestic federal statutory income tax rates to pretax income from continuing operations, that is attributable to deferred tax adjustment related to change in overall state tax rate.
The portion of performance share-based compensation awards that have payouts based on performance against internal performance metrics established by the entity.
Performance Share Awards Based on Internal Performance Metrics
Internal Metrics Performance Share Awards [Member]
Carrying amount at the balance sheet date for land, building, and other equipment used in the normal conduct of business and not intended for resale. Amount does not include depreciation.
Land, Building and Other Equipment
Land, building and other equipment
Line of Credit Facility, Basis Spread Increase Total Indebtedness Percentage of Borrowing Base Level Four
Represents the percentage of the entity's total indebtedness to its borrowing base under the credit facility under the fourth level.
Percentage of the entity's total indebtedness to its borrowing base under the credit facility under the fourth level
Line of Credit Facility, Basis Spread Increase Total Indebtedness Percentage of Borrowing Base Level One
Represents the percentage of the entity's total indebtedness to its borrowing base under the credit facility under the first level.
Percentage of the entity's total indebtedness to its borrowing base under the credit facility under the first level
Represents the percentage of the entity's total indebtedness to its borrowing base under the credit facility under the third level.
Percentage of the entity's total indebtedness to its borrowing base under the credit facility under the third level
Line of Credit Facility, Basis Spread Increase Total Indebtedness Percentage of Borrowing Base Level Three
Line of Credit Facility, Basis Spread Increase Total Indebtedness Percentage of Borrowing Base Level Two
Represents the percentage of the entity's total indebtedness to its borrowing base under the credit facility under the second level.
Percentage of the entity's total indebtedness to its borrowing base under the credit facility under the second level
Increased maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility, if any one or more of the existing banks or new banks agree to provide such increased commitment amount.
Line of Credit Facility Contingent Increase to Maximum Borrowing Capacity
Increase of maximum borrowing capacity
Period to reduce outstanding debt in equal monthly installments to the adjusted credit line available
Represents the period over which the entity has to reduce its outstanding borrowings in the event that the adjusted credit line available is less than outstanding borrowings.
Line of Credit Facility, Period to Reduce Outstanding Debt in Equal Monthly Installments to the Adjusted Credit Line Available
Document Period End Date
Maturity period of debt
Represents the maturity period of long-term debt.
Term
Long Term Debt Maturity Period
Long Term Debt, Number of Tranches
Number of tranches
Number of tranches in which long-term debt is issued.
Market Based Performance Share Awards [Member]
The portion of performance share-based compensation awards that have payouts based on market conditions established by the entity.
Performance Shares Based on Market Conditions
Natural Gas Purchase
Natural gas purchases
Carrying value as of the Balance Sheet date of obligations incurred and payable to vendors for purchases of Natural Gas. Used to reflect the current portion of the liability (due within one year or within normal operating cycle if longer).
Represents the natural gas revenues line item in the statement of operations.
Natural Gas Revenues
Natural Gas Revenues [Member]
9.78% Notes.
9.78% notes
Nine Point Seven Eight Percentage Notes [Member]
Non-qualified pension plans
Non Qualified Pension Plan [Member]
Represents the unfunded non-qualified supplemental pension plan for certain executive officers.
Pennsylvania Department of Environmental Protection (PaDEP)
PaDEP [Member]
Pennsylvania Department of Environmental Protection (PaDEP) environmental issues.
Represents the aggregate amount of payments for fines and civil payments to a regulatory agency as of the balance sheet date.
Payments for Environmental Loss, Aggregate Amount of Fines and Civil Penalties Paid
Aggregate amount of fines and civil penalties paid to PaDEP
Entity [Domain]
Proceeds from Sale of Oil and Gas Property and Equipment and Other Long Term Assets
The cash inflow to dispose of long lived physical asset and mineral interests in oil and gas properties used for the normal oil and gas operation and other Long-term assets.
Proceeds from sale of assets
Qualified Pension Plan
Qualified Pension Plan [Member]
Represents the non-contributory, defined benefit pension plan for all full-time employees.
The total amount due to the entity within one year of the balance sheet date (or one operating cycle, if longer) from outside sources, including trade accounts receivable, notes and loans receivable, as well as any other types of receivables.
Receivables Gross Current
Accounts receivable, gross
Reimbursed Drilling Costs
Repayment received from third parties per participation agreements for drilling costs incurred.
Reimbursement of drilling costs by third parties
Reimbursement Percentage of Drilling Costs
Third party reimbursement percentage of drilling costs
Third party reimbursement percentage of drilling costs.
Restricted Stock 3 Year Service Award [Member]
Restricted Stock - 3 Year Service Awards
Restricted stock awards that vest over a 3 year service period.
Restricted stock awards that vest under a graded-vesting approach.
Restricted Stock Graded Vesting Award [Member]
Restricted Stock - Graded Vesting
Represents the savings investment plan which provides for discretionary profit sharing contributions upon termination of the qualified pension plan effective from September 30, 2010.
Savings Investment Plan
Savings Investment Plan [Member]
Schedule of Amounts Recognized in Accumulated Other Comprehensive Income (Loss) [Table Text Block]
Schedule of amounts recognized in accumulated other comprehensive income
Tabular disclosure of the changes in net actuarial (gains) losses, net prior service cost (credit) and net transition obligation (assets) recognized in accumulated other comprehensive income.
Tabular disclosure of changes in the basis spread on variable rates for changes in the percentage of total indebtedness to the borrowing base of the revolving credit facility.
Schedule of Changes in Basis Spread on Variable Rate for Changes in Percentage of Total Indebtedness to Borrowing Base [Table Text Block]
Schedule of changes in the basis spread on LIBOR and Prime rates for changes in the percentage of total indebtedness to the borrowing base
Schedule of Debt Instruments Issued Tranches [Table Text Block]
Tabular disclosure of long-term debt instruments or arrangements by issued tranche. It includes principal amount, maturity term, maturity date and interest rate.
Schedule of long-term debt instruments by issued tranche
Disclosures about an individual defined contribution plan.
Schedule of Defined Contribution Plans Disclosures [Table]
Components of Net Periodic Benefit Cost and Other Amounts Recognized in Other Comprehensive Income
Tabular disclosure of the components of net benefit costs and amounts recognized in other comprehensive income (loss) for pension plans and/or other employee benefit plans.
Schedule of Net Benefit Costs and Amounts Recognized in Other Comprehensive Income (Loss) [Table Text Block]
Schedule of Share Based Payment Award, Valuation Assumptions [Table Text Block]
Tabular disclosure of the significant assumptions used during the year to estimate the fair value of share-based compensation.
Schedule of Value per Share and Assumptions Used
7.33% weighted-average fixed rate notes
Seven Point Three Three Percentage Weighted Average Fixed Rate Notes [Member]
7.33% Weighted Average Fixed Rate Notes
7.33% Weighted Average Fixed Rate Notes.
Represents minimum goal price per share of the Company's common stock to achieve final goal.
Share Based Compensation Arrangement by Share Based Payment Award, Common Stock Minimum Goal Price Per Share Final Target
Final goal price (in dollars per share)
Represents interim goal price per share.
Share Based Compensation Arrangement by Share Based Payment Award, Common Stock Interim Goal Price Per Share
Interim goal price (in dollars per share)
Share Based Compensation Arrangement by Share Based Payment Award Equity Instruments Other than Options Achievement Award Grant Date Fair Value Certified
The grant date fair value of the equity award other than option which was achieved based on performance and vested within the period.
Certified achievement, grant date fair value of award
Aggregate intrinsic value of stock appreciation rights outstanding
Share Based Compensation Arrangement by Share Based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value
The intrinsic value of vested and nonvested awards on equity-based plans excluding option plans (for example, stock appreciation rights plans) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units, as calculated by applying the disclosed pricing methodology.
Aggregate intrinsic value
Share Based Compensation Arrangement by Share Based Payment Award Equity Instruments Other than Options Cash Component
Performance share cash award in addition to shares
The amount of cash paid in addition to shares issued for shares issued under a share based compensation plan.
Share Based Compensation Arrangement by Share Based Payment Award Equity Instruments Other than Options Exercisable Intrinsic Value
Aggregate intrinsic value of stock appreciation rights exercisable
The total dollar difference between fair values of the underlying shares reserved for issuance and exercise prices of vested portions of equity instruments other than options outstanding and currently exercisable under the share-based compensation plan as of the balance sheet date.
Exercisable at the end of the period (in shares)
The number of shares as of the balance sheet date into which fully or partially vested equity instruments other than options outstanding as of the balance sheet date can be currently converted under the share-based compensation plan.
Share Based Compensation Arrangement by Share Based Payment Award Equity Instruments Other than Options Exercisable Number
The weighted average exercise price of exercisable awards on equity-based plans excluding option plans (for example, stock appreciation rights plans), including vested instruments.
Share Based Compensation Arrangement by Share Based Payment Award Non Option Equity Instruments Exercisable Weighted Average Exercise Price
Exercisable (in dollars per share)
Stock appreciation rights exercisable, weighted average remaining contractual term
The weighted average period between the balance sheet date and expiration for all equity awards other than options awarded under a share-based compensation plan.
Share Based Compensation Arrangement by Share Based Payment Award Equity Instruments Other than Options Exercisable Weighted Average Remaining Contractual Term
Exercised (in dollars per share)
The weighted average exercise price of awards exercised in the period on equity-based plans excluding option plans (for example, stock appreciation rights plans).
Share Based Compensation Arrangement by Share Based Payment Award Non Option Equity Instruments Exercises in Period Weighted Average Exercise Price
The number of equity-based payment instruments, excluding stock (or unit) options, that granted and fully vested during the reporting period.
Share Based Compensation Arrangement by Share Based Payment Award Equity Instruments Other than Options Granted and Vested in Period
Granted and fully vested (in shares)
Share Based Compensation Arrangement by Share Based Payment Award Equity Instruments Other than Options Issued and Fully Vested in Period
The number of equity-based payment instruments, excluding stock (or unit) options, that issued and fully vested during the reporting period.
Issued and Fully Vested (in shares)
The weighted average fair value at grant date for equity-based awards issued and fully vested during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).
Share Based Compensation Arrangement by Share Based Payment Award Equity Instruments Other than Options Issued and Fully Vested in Period Weighted Average Grant Date Fair Value
Issued and Fully Vested (in dollars per share)
Performance shares issued (in shares)
The number of shares issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).
Issued (in shares)
Share Based Compensation Arrangement by Share Based Payment Award Equity Instruments Other than Options Issued in Period
Represents the minimum operating cash flow which the entity must achieve in the one-year period preceding the vesting date of share-based compensation awards with payout based on performance.
Share Based Compensation Arrangement by Share Based Payment Award, Equity Instruments Other than Options, Minimum Operating Cash Flow Requirement
Minimum operating cash flow for the year preceding the performance period
The number of shares certified as payable pursuant to achievement of performance goals.
Certified achievement, shares issuable
Share Based Compensation Arrangement by Share Based Payment Award Equity Instruments Other than Options Number of Shares Issuable Certified
The term of share-based compensation awards other than options.
Share Based Compensation Arrangement by Share Based Payment Award, Equity Instruments Other than Options Term
Contractual term
Annual forfeiture rate assumption (as a percent)
Share Based Compensation Arrangement by Share Based Payment Award Fair Value Assumptions Expected Forfeitures
The rate of forfeitures assumptions that is used in calculating the fair values of a share-based compensation award.
Represents number of consecutive trading days considered for a payout.
Share Based Compensation Arrangement by Share Based Payment Award, Number of Consecutive Trading Days Considered for Final Payout
Number of consecutive trading days
Number of other companies in the Company's peer group
Number of other entities in entity's peer group against which the comparative performance of the entity is to be measured.
Share Based Compensation Arrangement by Share Based Payment Award Number of Entities in Peer Group Against which Performance is to be Measured
Share Based Compensation Arrangement by Share Based Payment Award, Number of Trading Days During which Closing Price Per Share of Entity's Common Stock Equals or Exceeds the Goal Price
Number of trading days during which the closing price per share of the company's common stock equals or exceeds the goal price
Represents number of trading days that triggers a payment (which need not be consecutive) if the closing price per share of the Company's common stock equals or exceeds the goal price.
Volume
Aggregate notional amount of price risk derivatives for instruments with notional amounts expressed in nonmonetary units.
Nonmonetary Notional Amount of Price Risk Derivatives 1
Represents number of types of equity-based payment instruments, excluding stock (or unit) options granted to employees under the equity-based compensation plan.
Share Based Compensation Arrangement by Share Based Payment Award Number of Types of Equity Instruments Other than Options Granted
Number of types of performance awards granted to employees
Represents the percentage of total distribution that will be deferred in accordance with the plan.
Share Based Compensation Arrangement by Share Based Payment Award Percentage of Aggregate Distribution Paid on Deferred Payment Dates
Percentage of the total distribution to be deferred in accordance with the plan
Share Based Compensation Arrangement by Share Based Payment Award Period within which Total Distribution
Represents the period within which total distribution will be paid.
Represents the period within which total distribution will be paid.
Percentage of total interim distribution paid in February
Represents the percentage of the total distribution earned as a result of the achievement of the interim goal price which was paid during the period.
Share Based Compensation Arrangement by Share Based Payment Award Percentage of Interim Goal Achievement Paid
Share Based Compensation Arrangement by Share Based Payment Award Interim Goal Achievement First Payment
Represents the amount paid to employees upon achievement of the interim goal under the plan.
Current distribution to be made to company's employees due to achievement of interim goal price of $25 per share
Share Based Compensation Arrangement by Share Based Payment Award Percentage of Interim Goal Achievement Deferred
Represents the percentage of the total distribution earned as a result of the achievement of the interim goal price which was deferred for subsequent payment.
Percentage of total interim distribution deferred
Represents the total amount payable as a result of the achievement of the interim goal price during the period.
Share Based Compensation Arrangement by Share Based Payment Award Interim Goal Achievement Total Payable
Distribution to be made to company's employees due to achievement of interim goal price of $25 per share
Entity Well-known Seasoned Issuer
Share Based Compensation Arrangement by Share Based Payment Award Incremental Percentage of Eligible Employees Base Salary to be Received by an Employee upon the Achievement of the Final Price Goal if Interim Goal Total was Paid
Incremental percentage of salary eligible for final distribution if company paid interim distributions upon achievement of the interim trigger
Incremental percentage of base salary to be received by eligible employees upon achievement of the final goal if the reporting entity made interim distributions based on achievement of the interim trigger.
Entity Voluntary Filers
Percentage of base salary to be received by eligible employees upon achievement of the interim price goal.
Share Based Compensation Arrangement by Share Based Payment Award Percentage of Eligible Employees Base Salary to be Received by an Employee upon the Achievement of the Interim Price Goal
Percentage of eligible employee's base salary for interim distribution
Entity Current Reporting Status
Represents the number of criteria measured for determination of the performance award.
Share Based Compensation Arrangement by Share Based Payment Award Performance Criteria Number
Number of criteria considered for awarding performance shares
Entity Filer Category
Number of types of performance shares awards for which performance goal period ended
Represents the number of performance shares awards for which performance goal period ended.
Share Based Compensation Arrangement by Share Based Payment Award, Performance Share Awards, End of Performance Period, Number
Entity Public Float
Share Based Compensation Arrangement by Share Based Payment Award, Stock Appreciation Rights, Additional Disclosures [Abstract]
Weighted-Average Exercise Price (in dollars per share)
Entity Registrant Name
The weighted average exercise price of awards granted in the period on equity-based plans excluding option plans (for example, stock appreciation rights plans).
Granted (in dollars per share)
Share Based Compensation Arrangement by Share Based Payment Award Non Option Equity Instruments Grants in Period Weighted Average Exercise Price
Entity Central Index Key
6.51% Weighted Average Fixed Rate Notes
Six Point Five One Percentage Weighted Average Fixed Rate Notes [Member]
6.51% Weighted Average Fixed Rate Notes.
6.51% weighted-average fixed rate notes
This element represent value stock amortization and vesting of stock during reporting period.
Stock Amortization and Vesting
Stock amortization and vesting
This element represent number of shares of stock amortization and vesting of stock during reporting period.
Stock Amortization and Vesting, Shares
Stock amortization and vesting (in shares)
Stock-based compensation, pension and other
Stock Based Compensation Expense Pension and Other
The aggregate amount of noncash, equity-based employee remuneration and non-cash pension expense. This may include the value of stock options, amortization of restricted stock, and adjustments for officers compensation, as well as other non-cash expenses. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.
Entity Common Stock, Shares Outstanding
Represents the information pertaining to 2004 stock incentive plan.
2004 Incentive Plan
Stock Incentive Plan 2004 [Member]
The Supplemental Employee Incentive Plan (the Plan) which intends to provide a compensation tool tied to stock market value creation to serve as an incentive and retention vehicle for full-time non-officer employees by providing for cash payments in the event the Company's common stock reaches a specified trading price.
Supplemental Employee Incentive Plan
Supplemental Employee Incentive Plans [Member]
Represents certain oil and gas properties in Texas.
Texas oil and gas properties
Texas Properties [Member]
Third Party Percentage of Working Interest in Leaseholds
Third party percentage of working interest in leaseholds
Third party percentage of working interest in leaseholds to be earned over the period of the agreement.
Represents a part of an issue of debt. A tranche sometimes refers to a single issue of a security released at different times.
7.33% Weighted-Average Fixed Rate Notes Tranche 1 due July 2011
Tranche One Seven Point Three Three Percentage [Member]
Represents a part of an issue of debt. A tranche sometimes refers to a single issue of a security released at different times.
7.33% Weighted-Average Fixed Rate Notes Tranche 3 due July 2016
Tranche Three Seven Point Three Three Percentage [Member]
Represents a part of an issue of debt. A tranche sometimes refers to a single issue of a security released at different times.
7.33% Weighted-Average Fixed Rate Notes Tranche 2 due July 2013
Tranche Two Seven Point Three Three Percentage [Member]
Represents a part of an issue of debt. A tranche sometimes refers to a single issue of a security released at different times.
Tranche One Six Point Five One Percentage [Member]
6.51% Weighted-Average Fixed Rate Notes Tranche 1 due July 2018
Tranche Two Six Point Five One Percentage [Member]
6.51% Weighted-Average Fixed Rate Notes Tranche 2 due July 2020
Represents a part of an issue of debt. A tranche sometimes refers to a single issue of a security released at different times.
Represents a part of an issue of debt. A tranche sometimes refers to a single issue of a security released at different times.
Tranche Three Six Point Five One Percentage [Member]
6.51% Weighted-Average Fixed Rate Notes Tranche 3 due July 2023
Tranche One Five Point Five Eight Percentage [Member]
5.58% Weighted-Average Fixed Rate Notes Tranche 1 due January 2021
Represents a part of an issue of debt. A tranche sometimes refers to a single issue of a security released at different times.
Tranche Two Five Point Five Eight Percentage [Member]
5.58% Weighted-Average Fixed Rate Notes Tranche 2 due January 2023
Represents a part of an issue of debt. A tranche sometimes refers to a single issue of a security released at different times.
5.58% Weighted-Average Fixed Rate Notes Tranche 3 due January 2026
Represents a part of an issue of debt. A tranche sometimes refers to a single issue of a security released at different times.
Tranche Three Five Point Five Eight Percentage [Member]
Treasury stock
Treasury Stock [Abstract]
Stock split
Stock Split [Abstract]
Interim trigger date occurs by June 30, 2014
Trigger Date J Twenty Four Months Ended June 2014 [Member]
Represents the achievement of the goal price during the period July 1, 2012 to June 30, 2014.
February 2013 Trigger Achievement
February 2013 Trigger Achievement [Member]
Represents achievement of the interim price goal trigger as of February 11, 2013.
Document Fiscal Year Focus
Trigger Date J Forty Eight Months Ended June 2016 [Member]
Represents the achievement of the goal price during the period July 1, 2012 to June 30, 2016.
Final trigger date occurs by June 30, 2016
Document Fiscal Period Focus
Tubular goods and well equipment
Tubular Goods and Well Equipment
Carrying amount as of the balance sheet date of tubular goods and well equipment used for drilling and equipping oil and material gas wells.
Participation Agreements
Participation agreements
Represents the number of participation agreements with third parties related to certain of the company's leaseholds.
Other Properties [Member]
Other properties
Represents the properties which are not specified elsewhere in the taxonomy.
Drilling Rig Commitments
Drilling Rig Commitments [Abstract]
Annuities paid
Defined Benefit Plan Annuities Paid
The amount of payments made towards annuities for which participants are entitled under a pension plan.
Drilling Rig Commitment Term
Drilling rig commitment term
Represents the term of the drilling rig commitment of the entity.
Defined Contribution Plan Cost Recognized Discretionary
Plan contributions charged to expense
Represents the plan contributions that are charged to expense.
Expense Recognized Due to Increase in Closing Price of Shares Held in Employee Trust and Due to Sale of Entity Share
Represents the expense recognized due to increase in the closing price of the entity's shares held in the trust and also due to the sale of shares in the entity's stock.
General and Administrative expense recognized due to increase in the closing price of the Company's shares held in the trust and also due to the sale of shares in the Company's stock
Proceeds from sale of oil and gas properties before closing adjustments
Sale of Property Proceeds before Closing Adjustment
Represents the proceeds expected to be received on the sale of property before adjustment for closing costs.
Share Based Compensation Arrangement by Share Based Payment Award, Equity Instruments Other than Options Nonvested, Fair Value
Represents the fair value of nonvested awards on equity-based plans excluding option plans or which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units.
Fair value per performance share award (in dollars per share)
Share Based Compensation Arrangement by Share Based Payment Award, Award Graded Vesting Period
Graded vesting rights
Description of the period of time over which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, which may be expressed in a variety of ways (for example, in years, month and year). The vesting is graded over this period of time.
Legal Entity [Axis]
Describes how an entity determines the level of its allowance for doubtful accounts for its trade and other accounts receivable balances, and when impairments, charge-offs or recoveries are recognized. The description identifies the factors that influence management's establishment of the level of the allowance (for example, historical losses and existing economic conditions) and may also include discussion of the risk elements relevant to particular categories of receivables.
Allowance for Doubtful Accounts
Receivables, Trade and Other Accounts Receivable, Allowance for Doubtful Accounts, [Policy Text Block]
Document Type
Length of pipeline to be constructed (in miles)
Represents the length of pipeline to be constructed under the development and construction agreement.
Development and Construction Agreement Length of Pipeline to be Constructed
Represents the contribution cap of investment.
Contribution cap
Jointly Owned Pipeline, Net Ownership Contribution Cap
Represents the period for which the investment is expected to occur.
Numbers of Years Investment Expected to Occur
Number of years of investment expected to occur
Ownership interest in the North leg (as a percent)
Jointly Owned Pipeline, Proportionate Ownership Share
The proportionate share of interest (percent) in a jointly owned pipeline.
Pearsall Shale [Member]
Represents the Pearsall shale prospect located in south Texas.
Pearsall shale
Represents the percentage of non-operated working interest sold by the entity to a third party.
Non Operated Working Interest
Non-operated working interest (as a percent)
Reimbursement Percentage of Completion and Drilling Costs
Percentage of fund for the Company's share of future drilling and completion costs
Third party reimbursement percentage of drilling costs, including completion costs.
Accounts receivable, net
Accounts and Notes Receivable, Net [Abstract]
Remaining unamortized costs under amended credit facility
For an unclassified balance sheet, the amount, as of the balance sheet date, of remaining capitalized costs associated with the amended credit facility (for example, legal, accounting, underwriting, printing, and registration costs) that will be charged against earnings over the life of the amended credit facility. Such amount is before the consideration of accumulated amortization.
Remaining Deferred Finance Costs under Amended Credit Facility
Jointly Owned Pipeline Net Ownership Contributions
Contributions
Represents the contributions to fund the cost associated with the project for the period.
Represents the amount certain to be funded for future drilling and completion costs by Osaka Gas Co., Ltd., associated with leaseholds.
Future Drilling and Completion Costs to be Funded by Third Party
Future drilling and completion costs to be funded by third party
Represents the available line of credit.
Available Line of Credit
Line of credit
Asset Retirement Obligation, Liabilities Divested
Liabilities divested
Amount of asset retirement obligations divested during the period.
Credit Risk [Policy Text Block]
Credit and Concentration Risk
Disclosure of set of policies and procedures formalizing the credit risk management process, the goal of which is to: protect against any unwarranted customer or counterparty credit exposures; maintain credit risk at a manageable level; and identify and avoid a material credit failure (of a significant value, which would impact earnings).
The number of reportable segments of the entity.
Number of operating segments
Reporting Segments, Number
Threshold percentage which the entity uses for disclosure.
Threshold for Disclosure, Percentage
Threshold percentage which the entity uses for disclosure
Stock Awards Not Subject to Achievement of Performance Based Goals [Member]
Stock awards not subject to the achievement of performance based goals
An arrangement not subject to the achievement of performance based goals, whereby an employee is entitled to receive in the future a number of shares in the entity at a specified price, as defined in the agreement.
Debt due in 2018
Amount of long-term debt, sinking fund requirements, and other securities redeemable at fixed or determinable prices and dates maturing in the sixth fiscal year following the latest fiscal year.
Long Term Debt Maturities Repayments of Principal in Year Six
Represents the number of appellants to whom permission to reinstate their appeal has been granted.
Number of Appellants to whom Permission to Reinstate their Appeal has been Granted
Number of appellants who were allowed by PEHB to reinstate their appeal
Reflects the percentage that revenues in the period from one significant customer is to net revenues, as defined by the entity, such as total net revenues, product line revenues, segment revenues. The risk is the materially adverse effects of loss of a significant customer.
Customer Two Concentration Risk [Member]
Customer two
Share Based Compensation Arrangement by Share Based Payment Award Equity Instruments Other than Options Issued in Period Weighted Average Grant Date Fair Value
Represents the weighted average fair value at grant date for shares issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).
Issued (in dollars per share)
Share Based Compensation Arrangement by Share Based Payment Award Non Option Equity Instruments Outstanding Weighted Average Exercise Price
The weighted average exercise price of outstanding awards on equity-based plans excluding option plans (for example, stock appreciation rights plans), including vested instruments.
Outstanding at the beginning of the period (in dollars per share)
Outstanding at the end of the period (in dollars per share)
Right to receive shares (as a percent)
Represents the right to receive shares under share-based compensation arrangement, expressed as a percentage.
Share Based Compensation Arrangement by Share Based Compensation Award, Percentage Right to Receive Shares
Tax Deferred Expense Compensation and Benefits Share Based Compensation Cost
Tax benefits related to employee stock-based compensation included in net operating loss carryforwards
Represents the amount before allocation of attributable to deductible temporary differences from share-based compensation not included in deferred tax assets.
Accounts Receivable
Accounts Receivable, Net, Current [Abstract]
Deferred distribution to be made to company's employees due to achievement of interim goal price of $25 per share in August 2014
Represents the total deferred amount payable as a result of the achievement of the interim goal price during the period.
Share Based Compensation Arrangement by Share Based Payment Award Interim Goal Achievement Total Payable Deferred
The interest rate used to adjust for the time value of money for the plan at beginning of year.
Discount Rate beginning of year (as a percent)
Defined Benefit Plan Assumptions Used Calculating Benefit Obligation Discount Rate Beginning of Year
Trade accounts
Accounts Payable, Trade, Current
Value per Share, low end of range (in dollars per share)
Share Based Compensation Arrangement by Share Based Payment Award, Equity Instruments Other than Options Grants in Period Weighted Average Fair Value Low End of Range
Low end of range of the weighted average fair value for nonvested share-based awards issued during the period on other than stock option plans (for example, phantom stock plan, stock appreciation rights plan, performance target plan).
Fair value per performance share award Assumptions, low end of range (in dollars per share)
Share Based Compensation Arrangement by Share Based Payment Award, Equity Instruments Other than Options Grants in Period Weighted Average Fair Value High End of Range
High end of range of the weighted average fair value for nonvested share-based awards issued during the period on other than stock option plans (for example, phantom stock plan, stock appreciation rights plan, performance target plan).
Value per Share, high end of range (in dollars per share)
Fair value per performance share award Assumptions, high end of range (in dollars per share)
Line of Credit Facility Maximum Borrowing Capacity before Amendment
Borrowing base prior to approval
Represents the maximum borrowing capacity under the credit facility before amendment.
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Changes in accumulated other comprehensive income / (loss) by component, net of tax
Net amount
Derivative Fair Value of Derivative Liability Amount Offset Against Collateral 1
The amount as of the balance sheet date of the fair value of derivative liabilities that in accordance with the entity's accounting policy were offset against the right to reclaim cash collateral under a master netting arrangement.
Net amounts of liabilities presented in the statement of financial position
Derivative Liabilities 1
Fair Value Liability
Fair values as of the balance sheet date of all liabilities resulting from contracts that meet the criteria of being accounted for as derivative instruments, net of the effects of master netting arrangements.
Gross amounts offset in the statement of financial position
Derivative Liability Fair Value Gross Asset 1
Fair value of derivative asset, presented on a gross basis even when the derivative instrument is subject to master netting arrangements and qualifies for net presentation in the statement of financial position.
Inventory, Net 1
Inventories
Inventory, net
Carrying amount (lower of cost or market) as of the balance sheet date of inventories less all valuation and other allowances. Excludes noncurrent inventory balances (expected to remain on hand past one year or one operating cycle, if longer).
SEIP III
Represents information pertaining to the Supplemental Employee Incentive Plan III (SEIP III).
Supplemental Employee Incentive Plans III [Member]
Supplemental Employee Incentive Plans IV [Member]
SEIP IV
Represents information pertaining to the Supplemental Employee Incentive Plan III (SEIP III).
Supplemental Employee Incentive Plan IV
Trigger Date Twenty Four Months Ended September 2015 [Member]
Interim trigger date occurs by September 30, 2015
Represents the achievement of the goal price during the period September 19, 2013 to September 30, 2015.
Trigger Date Forty Eight Months Ended September 2017 [Member]
Final trigger date occurs by September 30, 2017
Represents the achievement of the goal price during the period September 19, 2013 to September 30, 2017.
Oklahoma and Texas panhandles oil and gas properties
Oklahoma and Texas Panhandles Properties [Member]
Represents the certain proved and unproved oil and gas properties in Oklahoma and Texas panhandles.
Oklahoma Texas and Kansas Properties [Member]
Oklahoma, Texas and Kansas
Represents the certain proved and unproved oil and gas properties in Oklahoma and Texas and kansas.
Future Minimum Obligations Transportation Agreement [Abstract]
Future minimum obligations under transportation and gathering
Future Minimum Obligations Transportation Agreement First Full Fiscal Year
2014
Future minimum obligations for transportation agreements within the first full fiscal year following the date of the most recent balance sheet presented in the financial statements.
Future Minimum Obligations Transportation Agreement Second Full Fiscal Year
2015
Future minimum obligations for transportation agreements within the second full fiscal year following the date of the most recent balance sheet presented in the financial statements.
Future Minimum Obligations Transportation Agreement Third Full Fiscal Year
2016
Future minimum obligations for transportation agreements within the third full fiscal year following the date of the most recent balance sheet presented in the financial statements.
2017
Future minimum obligations for transportation agreements within the fourth full fiscal year following the date of the most recent balance sheet presented in the financial statements.
Future Minimum Obligations Transportation Agreement Fourth Full Fiscal Year
Trade accounts
Accounts Receivable, Gross, Current
Future Minimum Obligations Transportation Agreement Fifth Full Fiscal Year
2018
Future minimum obligations for transportation agreements within the fifth full fiscal year following the date of the most recent balance sheet presented in the financial statements.
Future Minimum Obligations Transportation Agreement Thereafter
Thereafter
Future minimum obligations for transportation agreements after the fifth full fiscal year following the date of the most recent balance sheet presented in the financial statements.
Supplemental Employee Incentive Plan II [Member]
SEIP II
Represents information pertaining to the Supplemental Employee Incentive Plan II (SEIP II).
Share Based Compensation Arrangement by Share Based Payment Award, Final Goal Achievement Total Payable
Distribution to be made to the company's employees due to achievement of interim goal price of $25 per share
Represents the total amount payable as a result of the achievement of the final goal price during the period.
Share Based Compensation Arrangement by Share Based Payment Award Percentage of Aggregate Distribution Paid
Percentage of the total distribution paid in September 2013
Represents the percentage of total distribution paid in September 2013.
Share Based Compensation Arrangement by Share Based Payment Award, Final Goal Achievement First Payment
Current distribution to be made to the company's employees due to achievement of final goal price of $37.50 per share
Represents the amount paid to employees upon achievement of the final goal under the plan.
Share Based Compensation Arrangement by Share Based Payment Award, Final Goal Achievement Total Payable, Deferred
Deferred distribution to be made to the company's employees due to achievement of final goal price of $37.50 per share in August 2014
Represents the total deferred amount payable as a result of the achievement of the final goal price during the period.
Defined Contribution Plan Maximum Annual Contributions Per Employer, Percent
Discretionary profit sharing contribution match on portion of employee salary and bonus (as a percent)
Maximum percentage of employee gross pay, by the terms of the plan, that the employer may contribute to a defined contribution plan.
Drilling Rig Obligation [Member]
Drilling Rig Obligation
Obligations for drilling rig.
Drilling Rig Commitments
Transportation Agreement Obligation [Member]
Transportation and Gathering Agreements
Obligations for transportation agreement.
Changes in accumulated other comprehensive income / (loss) by component, net of tax
Tabular disclosure of changes in accumulated other comprehensive income by component, net of tax.
Schedule of Accumulated Other Comprehensive Income (Loss) by Components [Table Text Block]
Offsetting Assets and Liabilities [Table Text Block]
Offsetting Assets and Liabilities [Table Text Block]
Tabular disclosure of derivative and other financial assets and liabilities that are subject to offsetting, including master netting arrangements.
Schedule of offsetting of derivative assets and liabilities in the condensed consolidated balance sheet
Carrying value as of the balance sheet date of obligations incurred and payable for advalorem taxes, franchise and other non-income taxes. Reflects the current portion of the liability (payable within one year or the normal operating cycle if longer).
Taxes other than income
Accrual for Ad Valorem and Other Non Income Taxes Current
Represents the number of households which the entity agreed to supply with potable water.
Modified Consent Order, number of households to be supplied with potable water
Accrual for Environmental Loss Number of Households Supplied with Potable Water
Amount of increase in the future aggregate obligations under the transportation commitments
Represents the increase (decrease) in aggregate future obligations for the transportation agreements during the period.
Increase Decrease in Aggregate Future Transportation Agreement Obligation
Accounts payable
Accounts payable current
Accounts Payable, Current
Taxes other than income
Taxes Other than Income Payable
Carrying value as of the balance sheet date of obligations incurred and payable mainly for drilling impact fee and production taxes. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).
Represents details about the achievement of the goal price.
Achievement Date [Axis]
Payment Period [Axis]
Information about the payment periods for the share-based compensation plan.
Additional Balance Sheet Information [Table Text Block]
Additional Balance Sheet Information
Tabular disclosure of supplemental balance sheet disclosures for assets and liabilities.
This element represents the aggregate adjustments to additional paid in capital for sale of stock held under employee compensation benefit trust.
Adjustments to Additional Paid in Capital Sale of Stock Held under Employee Compensation Benefit Trust
Sale of stock held in rabbi trust
Allocated Share Based Compensation Expense Related to Immediate Expensing of Shares Granted to Retirement Eligible Employees
Compensation expenses related to the immediate expensing of shares granted to retirement-eligible employees
Represents the expense recognized during the period, related to the immediate expensing of shares granted to retirement-eligible employees, arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.
Amortization of Unproved Properties
Amortization of unproved properties included in depreciation, depletion, and amortization
Represents the noncash expense charged against earnings to recognize amortization of unproved properties based on past drilling and development experience and average property lives, included in depreciation, depletion, and amortization in the consolidated statement of operations.
Amount Recognized in Net Periodic Cost and Other Comprehensive Income
Total Recognized in Net Periodic Benefit Cost and Other Comprehensive Income
Represents the aggregate amount recognized in net periodic benefit cost and other comprehensive income.
Costs incurred in brokering natural gas during the reporting period. The entity buys and sells natural gas utilizing separate purchase and sale transactions, typically with separate counterparties, whereby the entity and/or counterparty takes title to the natural gas purchases or sold. The entity recognizes the related revenues and expenses gross and realizes brokered margin as a result of buying and selling natural gas.
Brokered natural gas cost
Brokered Natural Gas Costs
Revenue related to brokering natural gas. The entity buys and sells natural gas utilizing separate purchase and sale transactions, typically with separate counterparties, whereby the entity and/or counterparty takes title to the natural gas purchases or sold. The entity recognizes the related revenues and expenses gross and realizes brokered margin as a result of buying and selling natural gas.
Brokered Natural Gas Revenue
Brokered natural gas
Capitalized Exploratory Well Costs Period of Capitalization
Minimum term of capitalization of exploratory well costs
Represents the term of capitalization used for aging disclosure.
Accounts payable
Accounts Payable, Current [Abstract]
Represents the number of financial institutions wherein cash and cash equivalents are primarily concentrated.
Cash and Cash Equivalents, Number of Financial Institutions
Number of financial institutions
Represents certain oil and gas properties located in Colorado, Utah and Wyoming which are subject to a purchase and sale agreement.
Colorado, Utah and Wyoming properties
Colorado Utah and Wyoming Properties [Member]
Common Stock Shares Vested Performance Share Awards Held in Employee Trust Shares
Represents the number of common stock representing vested performance share awards that were deferred into the rabbi trust.
Number of common stock deferred into the rabbi trust (in shares)
Other accounts
Accounts Payable, Other, Current
Common Stock Shares Held in Employee Trust Shares Earned but Not Distributed
Number of shares of common stock held in a trust that has been set up specifically to accumulate stock for the sole purpose of distribution to participating employees. Shares have been earned but not distributed.
Number of common stock deferred into the rabbi trust (in shares)
Concentration Risk, Number of Customers
Number of customers
For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the number of customers.
Represents the crude oil and condensate revenues line item in the statement of operations.
Crude Oil and Condensate Revenues
Crude Oil and Condensate Revenues [Member]
The cumulative cost of shares repurchased under a share repurchase program.
Cumulative cost of shares repurchased under a share repurchase program
Cumulative Payments for Repurchase of Common Stock
Cumulative number of shares that have been repurchased under a share repurchase program and are being held in treasury.
Cumulative number of shares repurchased under a share repurchase program
Cumulative Treasury Stock, Shares Acquired
Cumulative Treasury Stock, Shares Retired
Cumulative number of shares of common and preferred stock retired from treasury.
Treasury stock, cumulative shares retired
Represents the current assets line item in the statement of financial position.
Current Assets
Current Assets [Member]
Reflects the percentage that revenues in the period from one significant customer is to net revenues, as defined by the entity, such as total net revenues, product line revenues, segment revenues. The risk is the materially adverse effects of loss of a significant customer.
Customer one
Customer One Concentration Risk [Member]
Customer Three Concentration Risk [Member]
Reflects the percentage that revenues in the period from third significant customer is to net revenues, as defined by the entity, such as total net revenues, product line revenues, segment revenues. The risk is the materially adverse effects of loss of third significant customer.
Customer three
Represents the number of trailing quarters used to calculate the annual coverage ratio.
Debt Instrument Covenant Number of Trailing Quarters for Calculation of Annual Coverage Ratio
Number of trailing quarters used to calculate annual coverage ratio
Debt Instrument, Debt Percentage [Axis]
Represents the details of indebtedness as a percentage of the borrowing base.
Debt Instrument, Debt Percentage [Domain]
Represents the indebtedness as a percentage of the borrowing base.
Greater than equal to 50 percent but less than 75 percent
Debt Instrument Debt Percentage Greater than or Equal to Fifty Percent but Less than Seventy Five Percent [Member]
Represents indebtedness greater than or equal to 50 percent but less than 75 percent of the borrowing base.
Debt Instrument Debt Percentage Greater than or Equal to Ninety Percent [Member]
Represents indebtedness greater than or equal to 90 percent of the borrowing base.
Greater than and equal to 90 percent
Represents indebtedness greater than or equal to 75 percent but less than 90 percent of the borrowing base.
Greater than equal to 75 percent but less than 90 percent
Debt Instrument Debt Percentage Greater than or Equal to Seventy Five Percent but Less than Ninety Percent [Member]
Represents indebtedness greater than or equal to 25 percent but less than 50 percent of the borrowing base.
Greater than equal to 25 percent but less than 50 percent
Debt Instrument Debt Percentage Greater than or Equal to Twenty Five Percent but Less than Fifty Percent [Member]
Represents indebtedness less than 25 percent of the borrowing base.
Less than 25 percent
Debt Instrument Debt Percentage Less than Twenty Five Percent [Member]
Debt Instrument, Number of Institutional Investors
Number of institutional investors that purchased debt in a private placement offering
Number of institutional investors that purchased debt in a private placement offering.
Debt Instrument Tranches [Axis]
Represents details of tranches in which long-term debt is issued.
Debt Instrument Tranches [Domain]
Tranches in which long-term debt is issued.
The prime interest rate used to calculate the variable interest rate of the debt instrument.
ABR Loans
Debt Instrument Variable Rate Base Prime [Member]
The London Interbank Offered Rate (LIBOR) used to calculate the variable interest rate of the debt instrument.
Eurodollar Loans
Debt Instrument Variable Rate Euro Dollars LIBOR [Member]
Deferred Compensation Market Value of Assets Excluding Common Stock
Market value of the trust assets, excluding the Company's common stock
Represents the market value of the trust assets, excluding the entity's common stock.
Civil penalty paid by the company
Accrual for Environmental Loss Contingencies, Payments
Represents the description of age for medical benefits.
Age Criteria for Medical Benefits [Axis]
Age for Medical Benefits [Domain]
Represents the description of age by group for medical benefits.
Represents the age under 65 eligible for medical benefits.
Under Age 65 [Member]
Medical, before age 65
Age 65 and Older [Member]
Medical, age 65 and older
Represents the age 65 and older eligible for medical benefits.
Employee Performance Shares [Member]
Employee Performance Share Awards
Represents the shares or units awarded to the employees for meeting certain performance targets.
Hybrid Performance Shares [Member]
Hybrid Performance Share Awards
Represents the shares or units awarded to the employees for meeting certain performance targets, if the entity does not meet the performance metric for the applicable period, then the portion of the performance shares that would have been issued on that anniversary date will be forfeited.
TSR Performance Shares [Member]
TSR Performance Share Awards
Represents the shares or units awarded to the employees based on the comparative performance of the reporting entity's common stock measured against fifteen to sixteen other entities in its peer group over a three year performance period.
Share Based Compensation Arrangement by Share Based Payment Award Performance Period
Performance period
Represents the performance period for awards, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.
Accrued settlement liability for unpaid escrow
Accrual for Environmental Loss Contingencies
Trigger Date Two Years from The Effective Date [Member]
Interim trigger date
Represents the achievement of the goal during the two years of the effective date of the plan.
Final trigger date
Represents the achievement of the goal within four years of the effective date of the plan.
Trigger Date Four Years from The Effective Date [Member]
Payments Related to Share Based Compensation
Payments under share-based compensation plan
Represents the payment made during the period arising from equity-based compensation arrangements.
Represents the additional benefit obligation, which is the actuarial present value as of that date of all benefits attributed by the pension benefit formula to employee service rendered prior to that date.
Defined Benefit Plan Additional Benefit Obligation
Accrued additional benefits
Share Based Compensation Arrangement by Share Based Compensation Award Percentage Right to Receive Additional Shares
Right to receive additional shares (as a percent)
Represents the right of an employee to receive additional shares of common stock expressed as a percentage of award granted on satisfaction of either a service condition, market condition or a performance condition under an equity-based compensation plan.
Represents the period during which closing price per share equals or exceeds final price goal for the plan to provide a payout.
Share Based Compensation Arrangement by Share Based Payment Award Period from Effective Date of Plan During which Closing Share Price Equals or Exceeds Final Price Goal
Period during which closing price per share equals or exceeds final price goal
Represents the period during which closing price per share equals or exceeds an interim price goal for the plan to provide a payout.
Share Based Compensation Arrangement by Share Based Payment Award Period from Effective Date of Plan During which Closing Share Price Equals or Exceeds an Interim Price Goal
Period during which closing price per share equals or exceeds an interim price goal
Customer four
Reflects the percentage that revenues in the period from fourth significant customer is to net revenues, as defined by the entity, such as total net revenues, product line revenues, segment revenues. The risk is the materially adverse effects of loss of third significant customer.
Customer Four Concentration Risk [Member]
Deposit of Proceeds from Sale of Oil and Gas Properties
Proceeds from sale of oil and gas properties deposited
Represents the amount of deposits made from proceeds received from the sale of oil and gas properties with a qualified intermediary to facilitate potential like-kind exchange transactions pursuant to Section 1031 of the Internal Revenue Code.
Contracts which provide protection to the price of natural gas for the period January 2014 to December 2014 for Tranche 1.
Natural Gas Collar January 2014 to December 2014 Tranche 1 [Member]
Natural Gas Collars with contract period of Jan. 2014 - Dec. 2014 Tranche 1
Natural Gas Collar January 2014 to December 2014 Tranche 2 [Member]
Natural Gas Swaps with contract period of Jan. 2014 - Dec. 2014
Contracts which provide protection to the price of natural gas for the period January 2014 to December 2014 for Tranche 2.
Derivative instruments (current liabilities)
Current Liabilities [Member]
Represents the current liabilities in the statement of financial position.
Unrecognized Tax Benefits that Would Not Impact Effective Tax Rate
Recognized tax benefits that would not affect the effective tax rate
Represents the total amount of unrecognized tax benefits that, if recognized, would not affect the effective tax rate.
Other Comprehensive Income (Loss) Reclassification Adjustment from AOCI Pension and Other Postretirement Benefit Plans for Settlement Before Tax
Settlement
Amount, before tax, of reclassification adjustment from accumulated other comprehensive income (loss) for settlement related to pension and other postretirement benefit plans.
Represents the annual salary increase rate assumption that is used in valuing an option on its own shares.
Annual salary increase rate (as a percent)
Share Based Compensation Arrangement by Share Based Payment Award, Fair Value Assumptions Annual Salary Increase Rate
Share Based Compensation Arrangement by Share Based Payment Award, Fair Value Assumptions Annual Turnover Rate
Annual turnover rate
Represents the annual turnover rate assumption that is used in valuing an option on its own shares.
Expected contribution in future years
Represents the amount of expected contribution to be made by the entity for fund cost associated with the jointly owned pipeline in future years.
Jointly Owned Pipeline Net Ownership Expected Contribution
Number of Years over which Investment Expected for Contribution
Number of year's investment expected for contribution
Represents the period for which the investment is expected for contribution.
Deferred Tax Assets Derivative and Hedging Transactions
Derivatives and hedging
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from derivative instruments and hedging transactions.
Represents the cash payment for deferred compensation share based arrangements.
Deferred Compensation Share Based Arrangements Cash Payments
Cash payment
Natural Gas Collar April 2014 to December 2014 Tranche 1 [Member]
Natural Gas Collars with contract period of Apr. 2014 - Dec. 2014
Contracts which provide protection to the price of natural gas for the period April 2014 to December 2014 for Tranche 1.
Contracts which provide protection to the price of natural gas for the period April 2014 to December 2014 for Tranche 2.
Natural Gas Swap April 2014 to December 2014 Tranche 2 [Member]
Natural Gas Swaps with contract period of Apr. 2014 - Dec. 2014
Meade Pipeline Co LLC [Member]
Meade Pipeline Co LLC
Represents information pertaining to the Meade Pipeline Co LLC.
Transco
Represents information pertaining to Transcontinental Gas Pipe Line Company, LLC.
Transcontinental Gas Pipe Line Company LLC [Member]
Accrued liabilities
Accrued Liabilities, Current [Abstract]
Number of Counterparties to Agreement
Number of other companies
Represents the number of counterparties to agreement which were entered with the entity.
Capacity Per Day of New Pipeline on North Leg
Capacity of Central Penn Line on the North leg (in Dth per day)
Represents the capacity of new pipeline on the north leg.
Capacity Per Day of New Pipeline on South Leg
Capacity of Central Penn Line on the south leg (in Dth per day)
Represents the capacity of new pipeline on the south leg.
Capacity Owned by Entity Per Day on Newly Constructed Pipeline
Capacity owned by the entity on newly constructed pipeline (in MMBtu per day)
Represents the capacity owned by the entity on newly constructed pipeline.
Crude Oil Swap April 2014 to December 2014 [Member]
Crude Oil Swaps with contract period of Apr. 2014 - Dec. 2014
Contracts which provide protection to the price of crude oil for the period April 2014 to December 2014.
Period Over Which Increase (Decrease) in Aggregate Future Transportation Agreement Obligation is Affected
Period over which increase in transportation and gathering agreements obligation is affected
The period affected by the increase or (decrease) in aggregate future transportation agreement obligations.
Schedule of Derivative Instruments Gain (Loss) Recognized in Other Comprehensive Income (Loss) [Text Block]
Tabular disclosure of the location and amount of derivative instruments and nonderivative instruments designated as hedging instruments reported before netting adjustments, and the amount of gain (loss) recognized in other comprehensive income (loss) on derivative instruments and nonderivative instruments designated and qualified as hedging instruments.
Amount of gain (loss) recognized in other comprehensive income / (loss) on dervatives
Schedule of Derivative Instruments Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) [Text Block]
Amount of gain (loss) reclassified from accumulated other comprehensive income / (loss)
Tabular disclosure of the location and amount of derivative instruments and nonderivative instruments designated as hedging instruments reported before netting adjustments, and the amount of gain (loss) reclassified from accumulated other comprehensive income (loss) on derivative instruments and nonderivative instruments designated and qualified as hedging instruments.
Cash Flow Hedge Gain (Loss) to be Reclassified Remainder of Year
The estimated net amount of existing gains or losses on cash flow hedges at the reporting date expected to be reclassified to earnings within the remainder of the year.
Expected reclassification of income (loss) from commodity hedges over the next 9 months
Fair Value Transfers Assets Liabilities Between Level 1 and Level 2 Amount
Represents the amount of transfers of assets or liabilities measured on a recurring basis between Level 1 and Level 2 measurements.
Transfers between Level 1 and Level 2 measurements
Accrued liabilities
Accrued Liabilities [Member]
Amount of write-down of non-financial assets recognized in the income statement.
Non-financial assets
Asset Impairment Charges Non Financial
Asset Impairment Charges Non Financial Liabilities
Amount of write-down of non-financial liabilities recognized in the income statement.
Non-financial liabilities
Accrued Employee Benefits, Current
Employee benefits
Royalty and other owners
Accrued Royalties, Current
Income taxes payable
Accrued Income Taxes, Current
Accrued liabilities
Accrued liabilities
Accrued Liabilities, Current
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment
Accumulated depreciation, depletion and amortization
Accumulated Defined Benefit Plans Adjustment [Member]
Postretirement benefits
Postretirement Benefits
Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax
Unrealized gain (loss) included in accumulated other comprehensive income, net of tax
Balance at end of period
Accumulated other comprehensive income / (loss)
Balance at beginning of period
Accumulated Other Comprehensive Income (Loss), Net of Tax
Accumulated Other Comprehensive Income / (Loss)
Accumulated Other Comprehensive Income (Loss) [Member]
Net Gains/ (Losses) on Cash Flow Hedges
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]
Net gains / (losses) on cash flow hedges
Accumulated Other Comprehensive Income (Loss), net of taxes:
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Changes in the components of Accumulated Other Comprehensive Income/ (Loss), net of taxes
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss) [Table]
Unrealized losses included in accumulated other comprehensive income, pretax
Accumulated Other Comprehensive Income (Loss), before Tax
Foreign Currency Translation Adjustment
Accumulated Translation Adjustment [Member]
Additional paid-in capital
Additional Paid in Capital, Common Stock
Paid-In Capital
Additional Paid-in Capital [Member]
Reduction in additional paid-in capital due to pro forma effect
Adjustments to Additional Paid in Capital, Stock Split
Tax benefit of stock-based compensation
Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation
Adjustments to reconcile net income to cash provided by operating activities:
Adjustments, Noncash Items, to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract]
Total compensation cost recognized
Allocated Share-based Compensation Expense
Stock based compensation expense
Allowance for doubtful accounts
Allowance for Doubtful Accounts Receivable, Current
Amortization of Financing Costs
Amortization of debt issuance costs
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount
Weighted-average shares excluded from diluted earnings per share due to the anti-dilutive effect
Asset Retirement Obligation
Asset Retirement Obligation Disclosure [Text Block]
Assets legally restricted for purposes of settling asset retirement obligations
Asset Retirement Obligation, Legally Restricted Assets, Fair Value
Accretion expense
Asset Retirement Obligation, Accretion Expense
Additional disclosures
Asset Retirement Obligation [Abstract]
Asset retirement obligation
Asset Retirement Obligations, Noncurrent
Asset Retirement Obligations
Asset Retirement Obligations, Policy [Policy Text Block]
Asset Retirement Obligation
Change in estimate
Asset Retirement Obligation, Revision of Estimate
Balance at the beginning of the period
Balance at the end of the period
Asset Retirement Obligation.
Asset Retirement Obligation
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Liabilities settled
Asset Retirement Obligation, Liabilities Settled
Asset retirement obligation, current
Asset Retirement Obligation, Current
Liabilities incurred
Asset Retirement Obligation, Liabilities Incurred
Assets
Assets, Fair Value Disclosure [Abstract]
TOTAL ASSETS
Assets
Current assets
Assets, Current [Abstract]
ASSETS
Assets [Abstract]
Total current assets
Assets, Current
Total assets
Fair value of assets
Assets, Fair Value Disclosure
Average price per unit
Average Sales Prices
Balance Sheet Location [Axis]
ADDITIONAL BALANCE SHEET INFORMATION
Balance Sheet Location [Domain]
Basic - pro forma (post-stock split) (in dollars per share)
Basic Earnings Per Share, Pro Forma
Basis of Presentation and Nature of Operations
Basis of Accounting, Policy [Policy Text Block]
Buildings
Building [Member]
Accrued capital costs
Capital Expenditures Incurred but Not yet Paid
Balance at the end of the period
Balance at the beginning of the period
Balance at the end of the period
Capitalized Exploratory Well Costs
Schedule of net changes in capitalized exploratory well costs
Capitalized Exploratory Well Costs, Roll Forward [Table Text Block]
Additions to capitalized exploratory well costs pending the determination of proved reserves
Capitalized Exploratory Well Cost, Additions Pending Determination of Proved Reserves
Capitalized exploratory well costs
Capitalized Exploratory Well Costs [Abstract]
Exploratory suspended well costs
Capitalized exploratory well costs that have been capitalized for a period greater than one year
Capitalized Exploratory Well Costs that Have Been Capitalized for Period Greater than One Year
Capitalized exploratory well costs that have been capitalized for a period of one year or less
Capitalized Exploratory Well Costs that Have Been Capitalized for Period of One Year or Less
Capitalized exploratory well costs charged to expense
Capitalized Exploratory Well Cost, Charged to Expense
Carrying Amount
Reported Value Measurement [Member]
Cash and cash equivalents
Cash and cash equivalents, beginning of period
Cash and cash equivalents, end of period
Cash and Cash Equivalents, at Carrying Value
Cash and Cash Equivalents
Cash and Cash Equivalents, Policy [Policy Text Block]
Cash and Cash Equivalents
Cash and Cash Equivalents [Abstract]
Cash
Cash and Cash Equivalents [Member]
Supplemental Cash Flow Information
Cash Flow, Supplemental Disclosures [Text Block]
Commitments and Contingencies
Commitments and contingencies
Commitments and Contingencies.
Commitments and Contingencies
Commitments and Contingencies Disclosure [Text Block]
Commodity contracts
Commodity Contract [Member]
Common stock, par value (in dollars per share)
Common Stock, Par or Stated Value Per Share
Common Stock
Common Stock [Member]
Common stock: Authorized -- 480,000,000 shares of $0.10 par value in 2014 and 2013, respectively Issued--422,906,452 shares and 422,014,681 shares in 2014 and 2013, respectively
Common Stock, Value, Issued
Common stock, Issued shares
Common Stock, Shares, Issued
Cash dividends, per share (in dollars per share)
Common Stock, Dividends, Per Share, Declared
Company's common stock held in the rabbi trust
Common Stock Issued, Employee Trust, Deferred
Common stock, Authorized shares
Common Stock, Shares Authorized
Number of shares reserved for issuance
Common Stock, Capital Shares Reserved for Future Issuance
Dividends per common share (in dollars per share)
Common Stock, Dividends, Per Share, Cash Paid
Postretirement Benefits
Components of Income Tax Expense (Benefit), Continuing Operations [Abstract]
Income tax expense
Deferred tax liabilities and deferred tax assets
Components of Deferred Tax Assets and Liabilities [Abstract]
Accumulated Other Comprehensive Income / (Loss)
Comprehensive income / (loss)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent
Accumulated Other Comprehensive Income / (Loss)
Comprehensive Income (Loss) Note [Text Block]
Concentration Risk Type [Domain]
Credit Risk
Concentration Risk [Line Items]
Concentration Risk Benchmark [Domain]
Credit Risk
Concentration Risk, Credit Risk, Policy [Policy Text Block]
Concentration Risk Type [Axis]
Concentration Risk [Table]
Concentration Risk Benchmark [Axis]
Percentage of total sales
Concentration Risk, Percentage
2015
Contractual Obligation, Due in Second Year
2018
Contractual Obligation, Due in Fifth Year
2016
Contractual Obligation, Due in Fourth Year
2014
Contractual Obligation, Due in Next Twelve Months
2013
Contractual Obligation, Future Minimum Payments Due, Remainder of Fiscal Year
2016
Contractual Obligation, Due in Third Year
Thereafter
Contractual Obligation, Due after Fifth Year
Drilling Rig Commitments
Future obligations under natural gas and liquids transportation agreements
Contractual Obligation, Fiscal Year Maturity [Abstract]
Future minimum obligations of gas transportation agreements
Contractual Obligation
State
Current State and Local Tax Expense (Benefit)
Current
Current Income Tax Expense (Benefit), Continuing Operations [Abstract]
Federal
Current Federal Tax Expense (Benefit)
Total
Current Income Tax Expense (Benefit)
Customer
Customer Concentration Risk [Member]
Derivatives Designated as Hedging Instruments
Designated as Hedging Instrument [Member]
Description of variable rate basis
Debt Instrument, Description of Variable Rate Basis
Debt
Debt Instrument [Line Items]
Schedule of Long-term Debt Instruments [Table]
Principal
Debt Instrument, Face Amount
Margin (as a percent)
Debt Instrument, Basis Spread on Variable Rate
Debt and Credit Agreements
Debt Instrument [Axis]
Debt issuance costs
Debt Issuance Cost
Debt Instrument, Name [Domain]
Debt securities
Debt Securities [Member]
Interest rate (as a percent)
Coupon (as a percent)
Debt Instrument, Interest Rate, Stated Percentage
Current portion of the liability, included in Other Liabilities
Deferred Compensation Share-based Arrangements, Liability, Current
Incentive Plans
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Deferred Performance Shares
Deferred Compensation, Share-based Payments [Member]
Plan contributions charged to expense
Deferred Compensation Arrangement with Individual, Compensation Expense
Type of Deferred Compensation [Axis]
Deferred compensation plan
Deferred Compensation Plan Assets
Deferred income taxes
Deferred Income Taxes and Other Tax Receivable, Current
Federal
Deferred Federal Income Tax Expense (Benefit)
Capitalized debt issuance costs
Capitalized debt issuance costs, as amended September 2010
Deferred Finance Costs, Gross
Deferred
Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract]
Debt issuance costs
Deferred Finance Costs, Noncurrent, Gross
Deferred income tax expense
Total
Deferred Income Tax Expense (Benefit)
State
Deferred State and Local Income Tax Expense (Benefit)
Net deferred tax liabilities
Deferred Tax Assets, Net
Deferred income taxes
Deferred Tax Assets, Net, Current
Deferred compensation
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost
Other
Deferred Tax Assets, Other
Post-retirement benefits
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Postretirement Benefits
Items accrued for financial reporting purposes and other
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals
Total
Deferred Tax Assets, Net of Valuation Allowance
Deferred Tax Assets
Deferred Tax Assets, Net [Abstract]
Incentive compensation
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Employee Compensation
Post-retirement benefits
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits
Net operating loss carryforward
Deferred Tax Assets, Operating Loss Carryforwards
Alternative minimum tax carryforward
Deferred Tax Assets, Tax Credit Carryforwards, Alternative Minimum Tax
Foreign tax credits
Deferred Tax Assets, Tax Credit Carryforwards, Foreign
Deferred income taxes
Deferred Tax Liabilities, Net, Noncurrent
Properties and equipment
Deferred Tax Liabilities, Property, Plant and Equipment
Total
Deferred Tax Liabilities, Net
Deferred income taxes
Deferred Tax Liabilities, Net, Current
Deferred Tax Liabilities
Deferred Tax Liabilities, Gross [Abstract]
Derivatives and hedging
Deferred Tax Liabilities, Derivatives
Non-current portion of the liability , included in Other Liabilities
Deferred Compensation Share-based Arrangements, Liability, Classified, Noncurrent
Deferred compensation plan
Liabilities, including the Company's common stock
Deferred Compensation Liability, Classified, Noncurrent
Estimated amounts that will be amortized from accumulated other comprehensive income into net periodic benefit
Defined Benefit Plan, Amount to be Amortized from Accumulated Other Comprehensive Income (Loss) Next Fiscal Year [Abstract]
Settlement
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Settlements
2016
Defined Benefit Plan, Expected Future Benefit Payments, Year Three
Benefit Obligation at Beginning of Year
Benefit Obligation at End of Year
Defined Benefit Plan, Benefit Obligation
Benefit obligation
Amortization of prior service cost
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)
Change in Benefit Obligation
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Assumptions
Defined Benefit Plan, Assumptions Used in Calculations [Abstract]
Effect of a 1 percentage-point decrease in total of service and interest cost
Defined Benefit Plan, Effect of One Percentage Point Decrease on Service and Interest Cost Components
Cash flows
Defined Benefit Plan, Estimated Future Employer Contributions [Abstract]
Actuarial (Gain)/ Loss
Actuarial Loss
Defined Benefit Plan, Actuarial Gain (Loss)
2015
Defined Benefit Plan, Expected Future Benefit Payments, Year Two
Discount Rate (as a percent)
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate
Other changes in qualified plan assets and benefit obligations recognized in other comprehensive income
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss) [Abstract]
Net Actuarial Loss
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), Net Gains (Losses), before Tax
2018
Defined Benefit Plan, Expected Future Benefit Payments, Year Five
Expected Long-Term Return on Plan Assets (as a percent)
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets
Amortization of net loss
Defined Benefit Plan, Amortization of Gains (Losses)
Amounts Recognized in the Balance Sheet
Defined Benefit Plan, Amounts Recognized in Balance Sheet [Abstract]
Discount Rate (as a percent)
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate
Amounts Recognized in Accumulated Other Comprehensive Income
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), before Tax
Effect of a 1 percentage-point decrease in postretirement benefit obligation
Defined Benefit Plan, Effect of One Percentage Point Decrease on Accumulated Postretirement Benefit Obligation
2017
Defined Benefit Plan, Expected Future Benefit Payments, Year Four
Transition obligation
Defined Benefit Plan, Accumulated Other Comprehensive Income Net Transition Assets (Obligations), after Tax
Prior service cost
Defined Benefit Plan, Future Amortization of Prior Service Cost (Credit)
Net actuarial loss
Defined Benefit Plan, Future Amortization of Gain (Loss)
2014
Defined Benefit Plan, Expected Future Benefit Payments, Next Twelve Months
Pension and Other Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Amortization of net obligation at transition
Amortization of net obligation at transition
Defined Benefit Plan, Amortization of Transition Obligations (Assets)
Actual Return on Plan Assets
Defined Benefit Plan, Actual Return on Plan Assets
Amounts Recognized in Accumulated Other Comprehensive Income
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), before Tax [Abstract]
Rate of Compensation Increase (as a percent)
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Rate of Compensation Increase
Contribution match on portion of employee salary (as a percent)
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay
Benefits Paid
Benefits Paid
Defined Benefit Plan, Benefits Paid
Rate of Compensation Increase (as a percent)
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase
Years 2019-2023
Defined Benefit Plan, Expected Future Benefit Payments, Five Fiscal Years Thereafter
Change in Plan Assets
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Effect of a 1 percentage-point increase in total of service and interest cost
Defined Benefit Plan, Effect of One Percentage Point Increase on Service and Interest Cost Components
Estimated benefit payments
Defined Benefit Plan, Expected Future Benefit Payments, Fiscal Year Maturity [Abstract]
Effect 1 percentage-point increase in postretirement benefit obligation
Defined Benefit Plan, Effect of One Percentage Point Increase on Accumulated Postretirement Benefit Obligation
Current period service cost
Service Cost
Defined Benefit Plan, Service Cost
Accumulated Benefit Obligation
Defined Benefit Plan, Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets, Aggregate Accumulated Benefit Obligation
Funded Status at End of Year
Defined Benefit Plan, Funded Status of Plan
Interest Cost
Defined Benefit Plan, Interest Cost
Projected Benefit Obligation
Defined Benefit Plan, Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets, Aggregate Projected Benefit Obligation
Fair Value of Plan Assets at Beginning of Year
Fair Value of Plan Assets at End of Year
Balance at the end of the period
Fair value of plan assets
Defined Benefit Plan, Fair Value of Plan Assets
Defined Benefit Plan, Contributions by Employer
Employer's contribution
Effect of a one-percentage-point change in assumed health care cost trend rates
Defined Benefit Plan, Effect of One-Percentage Point Change in Assumed Health Care Cost Trend Rates [Abstract]
Curtailment Loss
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Curtailments
Net periodic pension cost
Defined Benefit Plan, Net Periodic Benefit Cost
Health Care Cost Trend Rate for Medical Benefits Assumed for Next Year (as a percent)
Defined Benefit Plan, Health Care Cost Trend Rate Assumed for Next Fiscal Year
Rate to which the cost trend rate is assumed to decline (the Ultimate Trend Rate) (as a percent)
Defined Benefit Plan, Ultimate Health Care Cost Trend Rate
Components of Net Periodic Benefit Cost
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Information for Pension Plans with an Accumulated Benefit Obligation in Excess of Plan Assets
Defined Benefit Plan, Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets [Abstract]
Expected return on plan assets
Defined Benefit Plan, Expected Return on Plan Assets
Fair Value of Plan Assets
Defined Benefit Plan, Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets, Aggregate Fair Value of Plan Assets
Plan contributions charged to expense
Increase in rabbi trust deferred compensation liability
Defined Contribution Plan, Cost Recognized
Weighted-average assumptions used to determine projected pension benefit obligations
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]
Defined Benefit Plan, Asset Categories [Axis]
Defined Benefit Plan and Other Postretirement Benefit Plan [Domain]
Weighted-average assumptions used to determine net periodic pension costs
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Defined Benefit Plans and Other Postretirement Benefit Plans [Axis]
Year that the rate reaches the Ultimate Trend Rate
Defined Benefit Plan, Year that Rate Reaches Ultimate Trend Rate
Prior Service Cost
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), Net Prior Service Cost (Credit), before Tax
Depreciation, depletion and amortization
Depreciation, Depletion and Amortization
Gross amounts offset in the statement of financial position
Derivative Asset, Fair Value, Gross Liability
Gross amounts of financial instruments not offset in the statement of financial position
Derivative, Collateral, Right to Reclaim Cash
Derivative instruments
Derivative Contracts
Derivative Instruments and Hedges, Assets
Derivative disclosures
Derivative [Line Items]
Derivative Assets (Liabilities), at Fair Value, Net
Estimated Fair Value Asset (Liability)
Amount of Gain (Loss) Recognized in Income on Derivative Not Designated
Unrealized loss included in natural gas revenues
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net
Derivative Instrument [Axis]
Derivative [Table]
Derivative instruments
Derivative Instruments and Hedges, Noncurrent
Derivative Instruments and Hedging Activities
Derivative Instruments and Hedging Activities Disclosure [Text Block]
Derivative Instruments and Hedging Activities
Fair Value Asset
Net amounts of assets presented in the statement of financial position
Derivative Asset
Derivative instruments
Derivative Liability, Current
Gross amounts financial instrument not offset in the statement of financial position
Derivative, Collateral, Obligation to Return Cash
Derivative contracts
Gross amounts of recognized assets
Derivative Asset, Fair Value, Gross Asset
Gross amounts of recognized assets
Net amount
Derivative Instruments
Derivative Asset, Fair Value, Amount Offset Against Collateral
Collar Ceiling Price
Derivative, Cap Price
Fair Value Asset (Liability)
Derivative, Fair Value, Net
Fair Value Liability
Gross amounts of recognized liabilities
Derivative Liability, Fair Value, Gross Liability
Derivative contracts
Derivative, by Nature [Axis]
Collar Floor Price
Derivative, Floor Price
Open derivative contracts
Derivative, Number of Instruments Held
Derivative, Name [Domain]
Swaps Weighted Average
Derivative, Swap Type, Average Fixed Price
Derivative Contract [Domain]
Effect of derivative instruments on the Consolidated Statement of Operations
Derivative Instruments, Gain (Loss) [Line Items]
Derivative contracts
Derivative instruments
Derivative Instruments and Hedges, Liabilities
Derivative and Hedging Activities
Derivatives, Policy [Policy Text Block]
Effect of derivative instruments on the Consolidated Balance Sheet
Derivatives, Fair Value [Line Items]
Diluted - pro forma (post-stock split) (in dollars per share)
Diluted Earnings Per Share Pro Forma
Direct operations
Direct Operating Costs
Stock-based Compensation
Disclosure of Compensation Related Costs, Share-based Payments [Text Block]
Stock-based Compensation
Divestitures
Divestitures
Disposal Groups, Including Discontinued Operations, Disclosure [Text Block]
Cash dividends at $0.06, $0.04 and $0.03 per share for the year ended December 31, 2013, 2012 and 2011, respectively
Dividends, Common Stock, Cash
Federal
Domestic Tax Authority [Member]
Earnings per Common Share
Earnings Per Share [Text Block]
Basic (in dollars per share)
Earnings Per Share, Basic
Basic - as reported (pre-stock split) (in dollars per share)
Diluted (in dollars per share)
Earnings Per Share, Diluted
Diluted - as reported (pre-stock split) (in dollars per share)
Earnings per share
Earnings per Common Share
Statutory federal income tax rate (as a percent)
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent
Stock options
Employee Stock Option [Member]
Employee Service Share-based Compensation, Tax Benefit from Compensation Expense
Tax benefits realized for stock-based compensation
Unamortized compensation expense
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized
Unrecognized compensation expense recognition period
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition
Natural gas in storage
Energy Related Inventory, Natural Gas in Storage
Environmental Remediation Site [Axis]
Environmental Matters
Environmental Costs, Policy [Policy Text Block]
Environmental Remediation Site [Domain]
Capital Stock
Equity Method Investment
Equity Method Investments and Joint Ventures Disclosure [Text Block]
Equity method investment
Net book value
Equity Method Investments
Ownership interest (as a percent)
Equity Method Investment, Ownership Percentage
Investment, Name [Domain]
Amount of investment
Equity Method Investment, Aggregate Cost
Equity Component [Domain]
Equity Method Investment
Equity Method Investment
Equity Method Investment
Equity Method Investments, Policy [Policy Text Block]
Estimated Fair Value
Estimate of Fair Value Measurement [Member]
Stock-based compensation tax benefit
Tax benefits realized for stock-based compensation
Excess Tax Benefit from Share-based Compensation, Operating Activities
Stock-based compensation tax benefit
Tax benefits resulting from tax deductions in excess of expense, reported as an operating cash outflow and a financing cash inflow
Excess Tax Benefit from Share-based Compensation, Financing Activities
Exploration
Exploration Expense
Settlements
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Purchases, Sales, Issues, Settlements
Measurement Frequency [Axis]
Balance at beginning of period
Balance at end of period
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs
Fair Value Measurements, Recurring and Nonrecurring [Table]
Reconciliation of changes in the fair value of financial assets and liabilities classified as Level 3 in the fair value hierarchy
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Fair Value, Hierarchy [Axis]
Recurring basis
Fair Value, Measurements, Recurring [Member]
Included in other comprehensive income
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Other Comprehensive Income (Loss)
Included in earnings
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings
Total gains or (losses) (realized or unrealized):
Fair Value, Assets and Liabilities Measured on Recurring Basis, Gain (Loss) Included in Earnings [Abstract]
Fair Value Inputs, Counterparty Credit Risk
Counterparty Credit Risk
Transfer of Assets from Level 2 to Level 1
Fair Value, Assets, Level 2 to Level 1 Transfers, Amount
Cabot Credit Risk
Fair Value Inputs, Entity Credit Risk
Fair Value, Measurement Frequency [Domain]
Transfer of Liabilities from Level 1 to Level 2
Fair Value, Liabilities, Level 1 to Level 2 Transfers, Amount
Fair Value Inputs [Abstract]
Unobservable input
Transfer of Assets from Level 1 to Level 2
Fair Value, Assets, Level 1 to Level 2 Transfers, Amount
Measurement Basis [Axis]
Financial Assets and Liabilities Fair Value Measurement
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Transfer of Liabilities from Level 2 to Level 1
Fair Value, Liabilities, Level 2 to Level 1 Transfers, Amount
Fair Value Measurements
Transfers in and/or out of level 3
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers, Net
Non-recurring basis
Fair Value, Measurements, Nonrecurring [Member]
Fair Value Hierarchy [Domain]
Fair Value Measurements
Fair Value Disclosures [Text Block]
Fair value disclosures
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value, by Balance Sheet Grouping [Table]
Fair Value Measurement [Domain]
Carrying amounts and fair values of long-term debt
Fair Value, by Balance Sheet Grouping [Table Text Block]
Significant Unobservable Inputs (Level 3)
Fair Value, Inputs, Level 3 [Member]
Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Inputs, Level 1 [Member]
Significant Other Observable Inputs (Level 2)
Fair Value, Inputs, Level 2 [Member]
Properties and Equipment
Full Cost or Successful Efforts, Policy [Policy Text Block]
Ineffectiveness related to derivative instruments
Gain (Loss) on Cash Flow Hedge Ineffectiveness, Net
Amount of Realized Gain (Loss) Recognized in Income on Derivatives Not Designated
Gain (Loss) on Sale of Commodity Contracts
Gain/(loss) on sale of assets
(Gain) / loss on sale of assets
Net Gain (loss) on sale of assets
Gain (Loss) on Disposition of Property Plant Equipment
Producer gas imbalances
Gas Balancing Payable, Current
Pipeline and transmission systems
Gas Transmission Equipment [Member]
Gathering and compression equipment
Gas Gathering and Processing Equipment [Member]
Transportation and gathering
Gas Gathering, Transportation, Marketing and Processing Costs
General and administrative
General and Administrative Expense
General and administrative expenses
Hedging Designation [Axis]
Hedging Designation [Domain]
Impairment of oil and gas properties and other assets
Impairment of Oil and Gas Properties
CONDENSED CONSOLIDATED STATEMENT OF OPERATIONS
Income Statement Location [Axis]
Income Taxes
Income Tax Authority [Domain]
Income Tax Authority [Axis]
Income Taxes
Income Tax Disclosure [Text Block]
Income Statement Location [Domain]
Sale of foreign assets
Effective Income Tax Rate Reconciliation, Disposition of Asset, Amount
Income tax expense
Total income tax expense
Tax (expense) / benefit
Income Tax Expense (Benefit)
Reconciliation of actual provision for income taxes and provision for income taxes resulting from the use of federal statutory income tax
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Income taxes
Income Taxes Paid, Net
Income taxes receivable
Income Taxes Receivable, Current
Computed "expected" federal income tax
Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount
Income Taxes
Income Tax, Policy [Policy Text Block]
State income tax, net of federal income tax benefit
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount
Other, net
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount
Restricted cash
Increase in Restricted Cash
Net changes in capitalized exploratory well costs
Increase (Decrease) in Capitalized Exploratory Well Costs that are Pending Determination of Proved Reserves [Roll Forward]
Income taxes
Increase (Decrease) in Income Taxes Payable, Net of Income Taxes Receivable
Accounts payable and accrued liabilities
Increase (Decrease) in Accounts Payable and Accrued Liabilities
Changes in assets and liabilities:
Increase (Decrease) in Operating Capital [Abstract]
Inventories
Increase (Decrease) in Inventories
Other assets and liabilities
Increase (Decrease) in Other Operating Assets and Liabilities, Net
Accounts receivable, net
Increase (Decrease) in Receivables
Other current assets
Increase (Decrease) in Prepaid Expense and Other Assets
Accumulated Other Comprehensive Income/ (Loss), activity
Increase (Decrease) in Stockholders' Equity
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dilution effect of stock appreciation rights and stock awards at end of period (in shares)
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements
Interest payable
Interest Payable, Current
Interest expense and other
Interest Income (Expense), Net
Interest
Interest Paid, Net
Inventories
Inventory, Policy [Policy Text Block]
Inventories
Inventory Disclosure [Abstract]
Letters of credit outstanding
Letters of Credit Outstanding, Amount
Weighted-average interest rate (as a percent)
Long-term Debt, Weighted Average Interest Rate
Rent expense
Operating Leases, Rent Expense
Lease Commitments
Leases, Operating [Abstract]
Total current liabilities
Liabilities, Current
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY
Liabilities and Equity
Current liabilities
Liabilities, Current [Abstract]
Total liabilities
Liabilities
LIABILITIES AND STOCKHOLDERS' EQUITY
Liabilities and Equity [Abstract]
Liabilities
Liabilities, Fair Value Disclosure [Abstract]
Total liabilities
Financial and Nonfinancial Liabilities, Fair Value Disclosure
Liability Component
Liability [Member]
Commitment fee percentage
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage
Borrowing base
Line of Credit Facility, Maximum Borrowing Capacity
Line of credit, outstanding
Line of Credit Facility, Amount Outstanding
Line of credit, outstanding
Revolving Credit Facility
Line of Credit [Member]
Weighted-average effective interest rates (as a percent)
Line of Credit Facility, Interest Rate During Period
Availability under the credit facility
Line of Credit Facility, Remaining Borrowing Capacity
Long-term debt
Total debt
Long-term Debt
Long-term debt
Debt and Credit Agreements
Long-term Debt [Text Block]
Debt due in 2013
Long-term Debt, Maturities, Repayments of Principal in Year Two
Debt due in 2016
Long-term Debt, Maturities, Repayments of Principal in Year Four
Debt due in 2016
Long-term Debt, Maturities, Repayments of Principal in Year Five
Current Maturities
Current portion of long-term debt
Current Maturities
Current maturities
Long-term Debt, Current Maturities
Long-term debt
Long-Term Debt, excluding current maturities
Long-term Debt, Excluding Current Maturities
Debt due in 2013
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months
Loss Contingency, Nature [Domain]
Loss Contingencies [Table]
Commitments and Contingencies
Loss Contingencies [Line Items]
Loss Contingency Nature [Axis]
Maximum potential loss if company is found liable
Loss Contingency, Range of Possible Loss, Maximum
Less than or equal to
Maximum
High end of range
Maximum [Member]
Greater than
Minimum
Low end of range
Minimum [Member]
Natural gas
Natural gas revenues
Natural Gas Production Revenue
CASH FLOWS FROM FINANCING ACTIVITIES
Net Cash Provided by (Used in) Financing Activities, Continuing Operations [Abstract]
CASH FLOWS FROM OPERATING ACTIVITIES
Net Cash Provided by (Used in) Operating Activities, Continuing Operations [Abstract]
Net increase / (decrease) in cash and cash equivalents
Net Cash Provided by (Used in) Continuing Operations
NET INCOME
Net income
Net Income (Loss) Available to Common Stockholders, Basic
Net cash provided by operating activities
Net Cash Provided by (Used in) Operating Activities, Continuing Operations
Net cash provided by financing activities
Net Cash Provided by (Used in) Financing Activities, Continuing Operations
Net cash used in investing activities
Net Cash Provided by (Used in) Investing Activities, Continuing Operations
CASH FLOWS FROM INVESTING ACTIVITIES
Net Cash Provided by (Used in) Investing Activities, Continuing Operations [Abstract]
Net Income
Net Income (Loss) Attributable to Parent
Recent Accounting Pronouncements
New Accounting Pronouncements, Policy [Policy Text Block]
Number of reporting segments
Number of Reportable Segments
Derivatives Not Designated as Hedging Instruments
Not Designated as Hedging Instrument [Member]
Offsetting of Derivative Assets and Liabilities in the Condensed Consolidated Balance Sheet
Offsetting [Abstract]
Derivative Liabilities
Offsetting Derivative Liabilities [Abstract]
Derivative Assets
Offsetting Derivative Assets [Abstract]
Oil and gas properties
Oil and Gas Properties [Member]
Crude oil and condensate
Crude oil and condensate revenues
Oil and Condensate Revenue
Joint interest accounts
Oil and Gas Joint Interest Billing Receivables
Thereafter
Operating Leases, Future Minimum Payments, Due Thereafter
Future minimum rental commitments under non-cancelable leases
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
OPERATING EXPENSES
Operating Expenses [Abstract]
2017
Operating Leases, Future Minimum Payments, Due in Four Years
TOTAL OPERATING EXPENSES
Operating Expenses
2018
Operating Leases, Future Minimum Payments, Due in Five Years
2016
Operating Leases, Future Minimum Payments, Due in Three Years
2014
Operating Leases, Future Minimum Payments Due, Next Twelve Months
INCOME FROM OPERATIONS
Operating Income (Loss)
Operating Loss Carryforwards [Table]
State tax effected net operating losses
Operating Loss Carryforwards [Line Items]
2015
Operating Leases, Future Minimum Payments, Due in Two Years
Aggregate future minimum rental commitments
Operating Leases, Future Minimum Payments Due
Net operating loss carryforwards
Operating Loss Carryforwards
Financial Statement Presentation
Financial Statement Presentation
Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Text Block]
Net change in defined benefit pension and postretirement plans, tax effect
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Tax
Other Commitments [Axis]
Other Commitments [Domain]
Other comprehensive income / (loss)
Other Comprehensive Income (Loss), Net of Tax
Net current-period other comprehensive income
Amortization of net obligation at transition
Other Comprehensive (Income) Loss, Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Transition (Asset) Obligation, Net of Tax
Amortization of net loss, income taxes
Other Comprehensive (Income) Loss, Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net (Gain) Loss, Tax
Amortization of net obligation at transition
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Transition Asset (Obligation), before Tax
Other Comprehensive (Income) Loss, Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net (Gain) Loss, Net of Tax
Amortization of net loss
Net change in unrealized gain on cash flow hedges, net of taxes
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax
Net changes in foreign currency translation adjustment, taxes
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Gain (Loss), before Tax
Amortization of net loss
Amortization of Net Loss
Total Recognized in Other Comprehensive Income
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, before Tax
Other Comprehensive (Income) Loss, Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, Net of Tax
Net (gain) / loss
Amount of gain (loss) reclassified from accumulated other comprehensive income (loss) into income (effective portion)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax
Other Comprehensive Income (Loss), Finalization of Pension and Other Postretirement Benefit Plan Valuation, Net of Tax
Settlement
Other Comprehensive (Income) Loss, Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Transition (Asset) Obligation, Tax
Amortization of net obligation at transition, income taxes
Settlement
Other Comprehensive Income (Loss), Finalization of Pension and Other Postretirement Benefit Plan Valuation, before Tax
Foreign currency translation adjustment
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, before Tax
Net change in unrealized gain on cash flow hedges, tax effect
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Tax
Amortization of prior service cost, income taxes
Other Comprehensive Income (Loss), Amortization Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Prior Service (Cost) Credit, Tax
Other current assets
Other Current Assets [Member]
Net change in defined benefit pension and postretirement plans, net of taxes
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax
Other comprehensive income before reclassifications
Other Comprehensive (Income) Loss, Amortization Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Prior Service Cost (Credit), before Tax
Amortization of prior service cost
Amortization of prior service cost
Other Comprehensive Income (Loss), Amortization Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Prior Service (Cost) Credit, Net of Tax
Reclassification adjustment for settled hedge contracts, income taxes
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Tax
Net changes in foreign currency translation adjustment, net of taxes
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax
Reclassification adjustment for settled hedge contracts
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, before Tax
Net (Gain)/Loss
Other assets
Other assets
Other Assets, Noncurrent
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Plan Amendments, Tax Effect
Plan termination and amendment, income taxes
Other accounts
Other Sundry Liabilities, Noncurrent
Other current assets
Other current assets
Other Assets, Current
Other Assets, Miscellaneous [Abstract]
Other current assets
Tax effect of Other Comprehensive Income (Loss) items:
Other Comprehensive Income (Loss), Tax [Abstract]
Net gain / (loss), income taxes
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, Tax
Net gain / (loss)
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, Net of Tax
Other accounts
Other Assets, Miscellaneous, Noncurrent
Other assets
Other Assets, Noncurrent [Abstract]
Changes in fair value of hedge contracts
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax
Settlement, income taxes
Other Comprehensive Income (Loss), Finalization of Pension and Other Postretirement Benefit Plan Valuation, Tax
Changes in fair value of hedge contracts, income taxes
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Tax
Amount of gain (loss) recognized in other comprehensive income (loss) on derivative (effective portion)
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax
Other Inventory, Gross
Other accounts
Other Energy Equipment [Member]
Other assets
Postretirement Benefits Other than Pensions
Postretirement Benefit
Other Postretirement Benefit Plan, Defined Benefit [Member]
Other liabilities
Other liabilities
Other Liabilities, Noncurrent
Other liabilities
Other Liabilities, Noncurrent [Abstract]
non-current assets
Other Assets [Member]
Other Revenue, Net
Other
Supplemental employee incentive plan
Other Employee Related Liabilities, Current
Other accounts
Other Accrued Liabilities, Current
Other Liabilities
Other Liabilities [Member]
Other accounts
Other Receivables
Other comprehensive income / (loss), net of taxes:
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract]
Foreign currency translation adjustment, income taxes
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax, Portion Attributable to Parent
Foreign currency translation adjustment
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent
Pension and postretirement benefits:
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Tax, Portion Attributable to Parent [Abstract]
Postretirement benefits:
Defined Benefit Pension and Postretirement Plans:
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax, Portion Attributable to Parent [Abstract]
Tax effect of Accumulated Other Comprehensive Income / (Loss) items:
Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent, Parenthetical Disclosures [Abstract]
Total other comprehensive income / (loss)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent
Products and Services [Domain]
Payments for Repurchase of Equity
Treasury stock repurchases
Payments to Acquire Equity Method Investments
Investment in equity method investment
Dividends paid
Payments of Ordinary Dividends, Common Stock
Payments of Debt Issuance Costs
Capitalized debt issuance costs
Capitalized debt issuance costs
Capital expenditures
Payments to Explore and Develop Oil and Gas Properties
Preferential Purchase Right Litigation
Pending Litigation [Member]
Amounts Recognized in the Balance Sheet
Pension and Other Postretirement Defined Benefit Plans, Liabilities
Postretirement benefits
Current Liabilities
Pension and Other Postretirement Defined Benefit Plans, Current Liabilities
Qualified and Non-Qualified Pension Plans
Pension Plan, Defined Benefit [Member]
Postretirement benefits
Long-Term Liabilities
Pension and Other Postretirement Defined Benefit Plans, Liabilities, Noncurrent
Postretirement Benefits
Pension and Other Postretirement Benefits Disclosure [Text Block]
Performance Share Awards
Performance Shares [Member]
Plan Name [Domain]
Plan Asset Categories [Domain]
Plan Name [Axis]
Prepaid balances
Prepaid Expense, Current
Prepaid balances and other
Prepaid Expense and Other Assets, Current
Diluted - pro forma (post-stock split) (in shares)
Pro Forma Weighted Average Shares Outstanding, Diluted
Other
Proceeds from (Payments for) Other Financing Activities
Borrowings from debt
Proceeds from Issuance of Long-term Debt
Proceeds from sale of oil and gas properties
Proceeds from Sale of Productive Assets
Products and Services [Axis]
Estimated useful life
Property, Plant and Equipment, Useful Life
Properties and Equipment, gross, total
Property, Plant and Equipment, Gross
Fair value of assets
Property, Plant, and Equipment, Fair Value Disclosure
Properties and equipment, net (Successful efforts method)
Properties and Equipment, Net
Property, Plant and Equipment, Net
Properties and Equipment, Net
Schedule of properties and equipment, net
Property, Plant and Equipment [Table Text Block]
Property, Plant and Equipment, Type [Domain]
Property, Plant and Equipment, Type [Axis]
Properties and Equipment, Net
Property, Plant and Equipment Disclosure [Text Block]
Properties and Equipment
Property, Plant and Equipment [Line Items]
Proved oil and gas properties
Proved Oil and Gas Property, Successful Effort Method
Range [Axis]
Range [Domain]
Accounts receivable, net
Accounts receivable, net
Receivables, Net, Current
Amount Reclassified from Accumulated Other Comprehensive Income
Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification out of Accumulated Other Comprehensive Income [Domain]
Reclassification out of Accumulated Other Comprehensive Income [Axis]
Reclassifications to wells, facilities, and equipment based on the determination of proved reserves
Reclassification to Well, Facilities, and Equipment Based on Determination of Proved Reserves
Reclassification out of Accumulated Other Comprehensive Income [Table]
Line items in income statement impacted by reclassifications out of accumulated other comprehensive income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Schedule of amount reclassified from accumulated other comprehensive income / (loss) into the Condensed Consolidated Statement of Operations
Reclassification out of Accumulated Other Comprehensive Income [Table Text Block]
Amounts reclassified from accumulated other comprehensive income
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax
Reconciliation of unrecognized tax benefits
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Repayments of debt
Repayments of Long-term Debt
Repayments of debt
Reclassification adjustment
Restatement Adjustment [Member]
Restricted Cash and Cash Equivalents
Restricted cash
Restricted Stock Units
Restricted Stock Units (RSUs) [Member]
Restricted Stock Awards
Restricted Stock [Member]
Exploration expense
Results of Operations, Dry Hole Costs
Retained Earnings
Retained Earnings [Member]
Retained earnings
Retained Earnings (Accumulated Deficit)
Revenue Recognition
Revenue Recognition
Revenue Recognition, Policy [Policy Text Block]
TOTAL OPERATING REVENUES
Revenues
OPERATING REVENUES
Revenues [Abstract]
Credit Facility
Revolving Credit Facility [Member]
Storage equipment and facilities
Support Equipment and Facilities [Member]
Equity Component
Shareholders' Equity [Member]
Expected term
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term
Total sales
Sales [Member]
Total sales
Sales Revenue, Net [Member]
Scenario, Unspecified [Domain]
Financial 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]
Asset Retirement Obligation
Schedule of Change in Asset Retirement Obligation [Table Text Block]
Components of net periodic benefit costs
Schedule of Net Benefit Costs [Table Text Block]
Schedule of Performance Share Awards Activity
Schedule of Nonvested Performance-based Units Activity [Table Text Block]
Change in the projected benefit obligation, plan assets at fair value and funded status
Schedule of Net Funded Status [Table Text Block]
Summary of cash paid for interest and income taxes
Schedule of Cash Flow, Supplemental Disclosures [Table Text Block]
Summary of income tax expense
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]
Schedule of aging of capitalized exploratory well costs
Schedule of Aging of Capitalized Exploratory Well Costs [Table Text Block]
Schedule of reconciliation of actual provision for income taxes and provision for income taxes computed by applying the statutory federal income tax rate
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]
Schedule of deferred tax liabilities and deferred tax assets
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]
Schedule of reconciliation of the beginning and ending amounts of unrecognized tax benefits
Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block]
Effect of Derivatives Not Designated as Hedging Instruments on the Condensed Consolidated Statement of Operations
Schedule of Other Derivatives Not Designated as Hedging Instruments, Statements of Financial Performance and Financial Position, Location [Table Text Block]
Schedule of amounts recognized in the balance sheet
Schedule of Amounts Recognized in Balance Sheet [Table Text Block]
Summary of SAR activity
Schedule of Share-based Compensation, Stock Appreciation Rights Award Activity [Table Text Block]
Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]
Future minimum rental commitments under non-cancelable leases
Effect of a one-percentage-point change in assumed health care cost trend rates
Schedule of Effect of One-Percentage-Point Change in Assumed Health Care Cost Trend Rates [Table Text Block]
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block]
Schedule of Restricted Stock Activity
Assumptions to determine projected postretirement benefit obligations and postretirement costs
Schedule of Assumptions Used [Table Text Block]
Schedule of Weighted Average Number of Shares [Table Text Block]
Calculation of basic and diluted weighted-average shares outstanding
Changes in the components of accumulated other comprehensive income/(loss), net of taxes
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]
Schedule of estimated benefit payments
Schedule of Expected Benefit Payments [Table Text Block]
Company's Long-Term Debt and credit agreements Components
Schedule of Long-term Debt Instruments [Table Text Block]
Investment, Name [Axis]
Schedule of Equity Method Investments [Table]
Schedule of Equity Method Investments [Line Items]
Equity Method Investment
Outstanding commodity derivatives
Schedule of Derivative Instruments [Table Text Block]
Schedule of Defined Benefit Plans Disclosures [Table]
Property, Plant and Equipment [Table]
Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table]
Effect of Derivative Instruments on the Condensed Consolidated Balance Sheet
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block]
Schedule of Significant Acquisitions and Disposals [Table]
Senior Notes
Senior Notes [Member]
General information on stock-based compensation
Additional disclosures
Share-based Compensation Arrangement by Share-based Payment Award, Additional General Disclosures [Abstract]
Requisite service period
Share-based Compensation Arrangement by Share-based Payment Award, Award Requisite Service Period
Additional information related to stock-based compensation
Additional disclosures
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]
Summary of restricted stock award activity
Shares or units
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Weighted-Average Exercise Price (in dollars per share)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Granted (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period
Granted (in dollars per share)
Granted and fully vested (in dollars per share)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value
Weighted-average value per SAR granted during the period (in dollars per share)
Outstanding at the beginning of the period (in shares)
Outstanding at the end of the period (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Number
Outstanding at beginning of year (in shares)
Outstanding at the end of the period (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number
Stock Price Volatility, high end of range (as a percent)
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Maximum
Stock Price Volatility, low end of range (as a percent)
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Minimum
Exercised (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Exercised
Vested (in shares)
Performance shares vested in period (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period
Risk free rate of return, high end of range (as a percent)
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Maximum
Vesting period
Number of years over which performance criteria is to be met
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period
Weighted-Average Grant Date Fair Value per Share
Weighted Average Grant Date Fair Value per Unit
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Stock-based Compensation arrangements
Stock-Based Compensation arrangements
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding at the end of the period (in dollars per share)
Outstanding at the beginning of the period (in dollars per share)
Grant date fair value (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
Vesting rights
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted
Granted (in shares)
Weighted-average remaining contractual term of non-vested shares
Weighted-average remaining contractual term of non-vested shares
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Outstanding, Weighted Average Remaining Contractual Terms
Weighted-average remaining contractual term of non-vested shares
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value
Forfeited or expired (in dollars per share)
Forfeited (in dollars per share)
Shares
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
Forfeited (in shares)
Forfeited or expired (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period
Risk free rate of return, low end of range (as a percent)
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Minimum
Exercised (in dollars per share)
Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price
Options exercisable (in dollars per share)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price
Expected dividend yield (as a percent)
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate
Value of performance share awards vested, on the grant date
Total fair value of shares vested
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value
Weighted-average grant date fair value of shares vested (in dollars per share)
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
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number
Options exercisable (in shares)
Additional disclosure abstract
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value
Total intrinsic value of options exercised
Stock price volatility (as a percent)
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate
Risk free rate of return (as a percent)
Assumptions
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Forfeited or Expired (in dollars per share)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period, Weighted Average Exercise Price
Forfeited or Expired (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period
Outstanding, at the end of the year (in dollars par share)
Outstanding, at the beginning of the year (in dollars per share)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price
Stock-Based Compensation
Share-based Compensation, Option and Incentive Plans Policy [Policy Text Block]
Outstanding, at the beginning of the year (in shares)
Outstanding, at the end of the year (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number
Number of shares sold
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period
Stock option activity
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Equity Award [Domain]
Balance (in shares)
Shares, Outstanding
Balance (in shares)
Significant Acquisitions and Disposals by Transaction [Axis]
Significant Acquisitions and Disposals
Significant Acquisitions and Disposals [Line Items]
Significant Acquisitions and Disposals, Transaction [Domain]
Total consideration received from the sale of properties
Significant Acquisitions and Disposals, Acquisition Costs or Sale Proceeds
Site Contingency [Table]
Environmental Matters
Site Contingency [Line Items]
State Tax Reporting
State and Local Jurisdiction [Member]
Scenario [Axis]
Statement [Table]
Statement
Reclassifications
Statement [Line Items]
CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY
CONDENSED CONSOLIDATED STATEMENT OF CASH FLOWS
Equity Components [Axis]
CONDENSED CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME
CONDENSED CONSOLIDATED BALANCE SHEET
Stock Issued During Period, Shares, Period Increase (Decrease)
Treasury stock reissued
Stock Issued During Period, Shares, Treasury Stock Reissued
Exercise of stock options and stock appreciation rights
Stock Issued During Period, Value, Stock Options Exercised
Treasury stock, number of shares authorized to be repurchased
Stock Repurchase Program, Number of Shares Authorized to be Repurchased
Exercise of stock options and stock appreciation rights (in shares)
Exercised (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period
Stock Appreciation Rights
Stock Appreciation Rights (SARs) [Member]
Stockholders' equity
Stockholders' Equity Attributable to Parent [Abstract]
Increase in the closing price of the Company's stock
Stockholders' Equity, Period Increase (Decrease)
Total stockholders' equity
Balance
Balance
Stockholders' Equity Attributable to Parent
Capital Stock
Stockholders' Equity Note Disclosure [Text Block]
Stock split ratio declared by the Board of Directors
Stockholders' Equity Note, Stock Split, Conversion Ratio
Subsequent Events [Text Block]
Subsequent Event-Stock Split
Subsequent Event-Stock Split
Subsequent Event [Table]
Subsequent event-stock split
Subsequent Event [Line Items]
Subsequent event
Subsequent Event [Member]
Subsequent Event Type [Domain]
Subsequent Event Type [Axis]
ADDITIONAL BALANCE SHEET INFORMATION
Supplemental Balance Sheet Disclosures [Text Block]
Supplemental Cash Flow Information
Taxes other than income
Taxes, Miscellaneous
Cost of shares repurchased
Treasury Stock, Value, Acquired, Cost Method
Purchase of treasury stock
Number of shares repurchased
Treasury Stock, Shares, Acquired
Purchase of treasury stock (in shares)
Treasury stock, shares
Shares held as treasury stock
Treasury Stock, Shares
Treasury Stock
Treasury Stock [Member]
Less treasury stock, at cost: 5,618,166 shares in 2014 and 2013, respectively
Treasury Stock, Value
Type of Deferred Compensation, All Types [Domain]
Unproved oil and gas properties
Unproved Oil and Gas Property, Successful Effort Method
Unrealized (gain) / loss on derivative instruments
Unrealized Gain (Loss) on Derivatives
Unrealized Gain (Loss) on Derivatives
Additions based on tax provisions related to the current year
Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions
Settlements, decrease
Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities
Reductions for tax positions of prior years
Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions
Unrecognized tax benefit balance at the beginning of the period
Unrecognized tax benefit balance at the end of the period
Unrecognized Tax Benefits
Settlements, increase
Unrecognized Tax Benefits, Increase Resulting from Settlements with Taxing Authorities
Additions for tax positions of prior years
Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions
Future minimum obligations under transportation and gathering agreements
Unrecorded Unconditional Purchase Obligations Disclosure [Table Text Block]
Use of Estimates
Use of Estimates, Policy [Policy Text Block]
Valuation Technique [Axis]
Valuation Technique [Domain]
Variable Rate [Domain]
Variable Rate [Axis]
Weighted Average
Weighted Average [Member]
Weighted-average common shares outstanding
Weighted Average Number of Shares Outstanding, Diluted [Abstract]
Basic (in shares)
Weighted-average shares - basic
Weighted Average Number of Shares Outstanding, Basic
Basic - as reported (pre-stock split) (in shares)
Basic - pro forma (post-stock split) (in shares)
Weighted Average Basic Shares Outstanding, Pro Forma
Diluted - as reported (pre-stock split) (in shares)
Diluted (in shares)
Weighted-average shares - diluted
Weighted Average Number of Shares Outstanding, Diluted