Accounts Receivable, Net, Current, Total
Accounts receivable (less accumulated provision for doubtful accounts: 2010, $18,335; 2009, $16,792)
Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning Balance
Accumulated other comprehensive income (loss)
Accumulated other comprehensive income (loss)
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment, Beginning Balance
Less: accumulated depreciation and depletion
Accumulated depreciation and amortization
Allowance for Doubtful Accounts Receivable, Current, Beginning Balance
Accounts receivable, accumulated provision for doubtful accounts (in dollars)
CONSOLIDATED BALANCE SHEETS
Cash and Cash Equivalents, at Carrying Value, Beginning Balance
Cash and cash equivalents
Cash and cash equivalents at beginning of year
Cash and cash equivalents at end of year
Interest Paid, Net, Total
Interest, net of amount capitalized
Other than temporary impairment of available-for-sale securities
Increase (Decrease) in Inventories, Total
Inventory
Increase (Decrease) in Receivables, Total
Accounts receivable and unbilled revenues
Increase (Decrease) in Risk Management Assets and Liabilities
Derivative instruments, at fair value
Proceeds from (Repayments of) Short-term Debt, Total
Increase (decrease) in short-term loans
Increase (Decrease) in Accounts Payable, Total
Accounts payable
Increase (Decrease) in Margin Deposits Outstanding
Margin deposits
Commitments and Contingencies Disclosure [Text Block]
Commitments and Contingencies
Common stock, authorized shares
Common stock, authorized shares
Common Stock, Value, Issued, Beginning Balance
Common stock, no par value, authorized 320,000 shares; shares issued: 175,684 in 2010 and 157,630 in 2009
Cost of Purchased Oil and Gas
Purchased gas costs
Liabilities, Current [Abstract]
Current liabilities:
Liabilities, Current, Total
Total current liabilities
Payments of Debt Issuance Costs
Revolving credit facility origination fee and debt issuance costs
Deferred Income Tax Expense (Benefit), Total
Deferred income taxes
Deferred income taxes
Subtotal
Depreciation, depletion and amortization
Derivative Assets, Total
Derivative instruments, at fair value
Derivative Instruments and Hedging Activities Disclosure [Text Block]
Derivative Instruments
Derivative Liabilities, Current
Derivative instruments, at fair value
Earnings Per Share, Diluted, Total
Net income (in dollars per share)
Diluted (in dollars per share)
Disposal Groups, Including Discontinued Operations, Disclosure [Text Block]
Discontinued Operations
Equity Method Investments Disclosure [Text Block]
Equity in Nonconsolidated Investments
Income (Loss) from Equity Method Investments
Equity in earnings of nonconsolidated investments
Equity in earnings of nonconsolidated investments
Energy Related Inventory, Total
Inventory
Equity Method Investments
Equity in nonconsolidated investments
Exploration Expense
Exploration
Exploration costs
Gain (Loss) on Sale of Oil and Gas Property, Total
Gain on sale of assets, net
Gain on sale of assets, net
Gain on sale of working interests in oil and gas properties
Net operating revenues
Impairment of Investments
Other than temporary impairment of available-for-sale securities
Other than temporary impairment of available-for-sale securities
Fair market value of debt and equity securities below cost
STATEMENTS OF CONSOLIDATED INCOME
Income from continuing operations
Income (Loss) from Continuing Operations, Per Diluted Share
Income from continuing operations (in dollars per share)
Income (Loss) from Continuing Operations, Per Outstanding Share, Total
Income from continuing operations (in dollars per share)
Income (Loss) from Discontinued Operations, Net of Tax, Per Diluted Share, Total
Income from discontinued operations (in dollars per share)
Income (Loss) from Discontinued Operations, Net of Tax, Per Outstanding Share, Total
Income from discontinued operations (in dollars per share)
Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest, Total
Income from discontinued operations, net of tax benefit of $3,246 for the year ended December 31,2006
Income from discontinued operations, net of tax
Income from discontinued operations, net of tax
Discontinued Operation, Tax Effect of Discontinued Operation, Total
Income from discontinued operations, tax benefit
Income Tax Disclosure [Text Block]
Income Taxes
Income Taxes Paid, Net, Total
Income taxes, net
Increase (Decrease) in Restricted Cash
Increase (Decrease) in Restricted Cash, Total
Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block]
Investments, Available-For-Sale
Liabilities and Stockholders' Equity [Abstract]
Liabilities and Common Stockholders' Equity
Liabilities and Stockholders' Equity, Total
Total liabilities and common stockholders' equity
Liabilities, Total
Total liabilities
Long-term Debt, Current Maturities, Total
Less debt payable within one year
Current portion of long-term debt
Long-term Debt, Excluding Current Maturities, Total
Long-term debt
Total long-term debt
Margin Deposit Assets
Margin deposits with brokers
Available-for-sale Securities, Noncurrent, Total
Investments, available-for-sale
Fair Value of Total investments
Net cash provided by operating activities
Net Cash Provided by (Used in) Operating Activities, Continuing Operations, Total
Net cash provided by (used in) operating activities, continuing operations
Net Cash Provided by (Used in) Financing Activities [Abstract]
Cash flows from financing activities:
Net Cash Provided by (Used in) Financing Activities, Total
Net cash provided by financing activities
Net Cash Provided by (Used in) Investing Activities [Abstract]
Cash flows from investing activities:
Net Cash Provided by (Used in) Investing Activities, Total
Net cash used in investing activities
Net Cash Provided by (Used in) Operating Activities [Abstract]
Cash flows from operating activities:
Net Cash Provided by (Used in) Operating Activities, Total
Net cash provided by operating activities
Proceeds from (Repayments of) Related Party Debt
Proceeds from (Repayments of) Related Party Debt, Total
Cash and Cash Equivalents, Period Increase (Decrease), Total
Net change in cash and cash equivalents
Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Text Block]
Recently Issued Accounting Standards
(Gains) Losses on Sales of Assets
Oil and Gas Revenue, Total
Operating revenues
Total
Revenues from external customers
Operating income
Operating Income (Loss), Total
Operating income
Operating income
Total operating income
Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]
Financial Statements
Other comprehensvie income, available-for-sale securities, adjustment, net of tax, period increase (decrease)
Other Comprehensive Income, Derivatives Qualifying as Hedges, Net of Tax [Abstract]
Net change in cash flow hedges:
Other Comprehensive Income, Derivatives Qualifying as Hedges, Net of Tax, Total
Natural gas, net of tax (see Note 3)
Natural gas, net of tax of $30,047, $27,166 and $155,678 during 2010, 2009 and 2008 respectively (see Note 3)
Other Comprehensive Income, Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax
Unrealized gain (loss) on available-for-sale securities
Other Assets, Current
Prepaid expenses and other
Other Nonoperating Income
Other income
Other income
Payments of Dividends, Common Stock
Dividends paid
Pension and Other Postretirement Benefits Disclosure [Text Block]
Pension and Other Post-retirement Benefit Plans
Proceeds from Issuance of Common Stock
Proceeds from issuance of common stock
Proceeds from Issuance of Long-term Debt, Total
Proceeds from issuance of long-term debt
Proceeds from note payable to Nora Gathering, LLC
Proceeds from Related Party Debt
Proceeds from Sale of Available-for-sale Securities, Total
Proceeds from sale of available-for-sale securities
Proceeds from Sale of Oil and Gas Property and Equipment
Proceeds from sale of assets
Property, Plant and Equipment, Gross, Beginning Balance
Property, plant and equipment
Property, Plant and Equipment, Net, Beginning Balance
Net property, plant and equipment
Provision for Doubtful Accounts
Provision for (recoveries of) losses on accounts receivable
Payments to Acquire Available-for-sale Securities, Total
Investment in available-for-sale securities
Payments to Acquire Available-for-sale Securities, Total
Payments to Acquire Oil and Gas Property
Purchase of working interest
Payments to Acquire Property, Plant, and Equipment, Total
Capital expenditures
Expenditures for segment assets
Regulatory Assets, Noncurrent
Regulatory assets
Total long-term regulatory assets
Repayments of Long-term Debt, Total
Repayments and retirements of long-term debt
Repayments of note payable to Nora Gathering, LLC
Repayments of Related Party Debt
Payments for Repurchase of Common Stock
Results of Operations, Production or Lifting Costs
Production
Production costs
Retained Earnings (Accumulated Deficit), Beginning Balance
Retained earnings
Schedule of Valuation and Qualifying Accounts Disclosure [Text Block]
SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS AND RESERVES
Segment Reporting Disclosure [Text Block]
Financial Information by Business Segment
Selling, General and Administrative Expense, Total
Selling, general and administrative
Significant Accounting Policies [Text Block]
Summary of Significant Accounting Policies
STATEMENTS OF CONSOLIDATED CASH FLOWS
CONSOLIDATED STATEMENTS OF COMMON STOCKHOLDERS' EQUITY
Supplemental Cash Flow Information [Abstract]
Cash paid (received) during the year for:
Assets, Current [Abstract]
Current assets:
Assets, Current, Total
Total current assets
Operating Expense, Maintenance and Operations
Operation and maintenance
Weighted Average Number of Shares Outstanding, Diluted, Total
Weighted average common shares outstanding (in shares)
Total
Weighted Average Number of Shares Outstanding, Basic, Total
Weighted average common shares outstanding (in shares)
Average common shares outstanding (in shares)
Common Stock
Property, plant and equipment
Assets, Total
Total assets
Total
Marketable Securities, Realized Gain (Loss), Total
Gain on sale of available-for-sale securities, net
Gain on sale of available-for-sale securities, net
Gross realized gains
Other Liabilities, Current, Total
Other current liabilities
Other Liabilities, Noncurrent, Total
Other credits
Common Stock, Shares Held in Employee Trust
Treasury stock, held in trust for deferred compensation, cost (in dollars)
Common Stock, Shares Held in Employee Trust, Shares
Treasury stock, held in trust for deferred compensation, shares
Common Stock, Dividends, Per Share, Declared
Dividends declared per common share (in dollars per share)
Disclosure of Compensation Related Costs, Share-based Payments [Text Block]
Share-Based Compensation Plans
Assets [Abstract]
Assets
Statement [Line Items]
Statement
Oil and Gas Exploration and Production Industries Disclosures [Text Block]
Natural Gas Producing Activities (Unaudited)
Net Cash Provided by (Used in) Investing Activities, Continuing Operations, Total
Net cash used in continuing investing activities
Net Cash Provided by (Used in) Financing Activities, Continuing Operations, Total
Net cash provided by (used in) financing activities
Cash Provided by (Used in) Operating Activities, Discontinued Operations
Net cash provided by (used in) operating activities, discontinued operations
Cash Provided by (Used in) Investing Activities, Discontinued Operations
Net cash used in discontinued investing activities
Cash Provided by (Used in) Financing Activities, Discontinued Operations
Cash provided by (used in) financing activities, discontinued operations
Treasury Stock, Value, Beginning Balance
Treasury stock, shares at cost: 26,531 in 2010 and 26,699 in 2009
Earnings Per Share, Basic, Total
Net income (in dollars per share)
Basic (in dollars per share)
Excess Tax Benefit from Share-based Compensation, Financing Activities
Excess tax benefits from share-based payment arrangements
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Increase (Decrease) in Stockholders' Equity
Excess Tax Benefit from Share-based Compensation, Operating Activities
Excess tax benefits from share-based payment arrangements
Common stock, shares issued
Common stock, shares issued
Increase (Decrease) in Deferred Income Taxes
Deferred income taxes
Other Assets, Noncurrent, Total
Other
Total operating expenses
Operating Expenses
Earnings Per Share, Basic [Abstract]
Basic:
Basic earnings per common share:
Earnings Per Share, Diluted [Abstract]
Diluted:
Diluted earnings per common share:
Earnings Per Share [Abstract]
Earnings per share of common stock:
Increase (Decrease) in Other Operating Liabilities
Other current liabilities
Treasury Stock, Shares, Beginning Balance
Treasury stock, shares
Other Comprehensive Income, Derivatives Qualifying as Hedges, Tax Effect, Total
Natural gas, tax (in dollars)
Other Comprehensive Income, Defined Benefit Plans, Tax, Total
Pension and other post-retirement benefits liability adjustment, tax benefit (in dollars)
Income Tax Expense (Benefit), Total
Income taxes
Total
Income tax expense
Derivative instruments, at fair value
Statement - Equity Components
Retained Earnings
Accumulated Other Comprehensive (Loss) Income
Equity Component
Common stock, no par value (in dollars per share)
Common stock, no par value
Long-term Debt [Text Block]
Long-Term Debt
Proceeds from Issuance of Shares under Incentive and Share-based Compensation Plans, Excluding Stock Options
Proceeds from exercises under employee compensation plans
Cash received from exercises of all share-based payment arrangements for employees and directors
Stock Issued During Period, Value, New Issues
Issuance of common shares
Stock Issued During Period, Value, Share-based Compensation
Stock-based compensation plans, net
Stock Issued During Period, Shares, New Issues
Issuance of common shares (in shares)
Stock Issued During Period, Shares, Share-based Compensation
Stock-based compensation plans, net (in shares)
Liability for Uncertain Tax Positions, Noncurrent
Unrecognized tax benefits
Cumulative Effect of Initial Adoption of FIN 48
Liability adjustment due to unrecognized tax benefits
Increase in liability for unrecognized tax benefits
Stock Repurchased During Period, Value
Stock Repurchased During Period, Shares
Increase (Decrease) in Pension and Postretirement Obligations, Total
Pension and other post-retirement benefits
Dividends
Dividends ($0.88 per share for 2010, 2009 and 2008)
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest, Total
Net income
Net income
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract]
Common stockholders' equity:
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Beginning Balance
Total common stockholders' equity
Balance
Balance
Accounts Payable, Current
Accounts payable
Pension and Other Postretirement Defined Benefit Plans, Liabilities, Noncurrent
Pension and other post-retirement benefits
Noncurrent liabilities
Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract]
Adjustments to reconcile net income to net cash provided by operating activities:
Notes Payable, Related Parties, Current
Note payable to Nora Gathering, LLC
Net income
Property, Plant, and Equipment, Gross, Equitable Supply
The amount, before accumulated depreciation is netted out, of Property, Plant, and Equipment for the Equitable Supply segment.
Property, plant, and equipment, gross, Equitable Supply
Property, Plant, and Equipment, Gross, Equitable Utilities
The amount, before accumulated depreciation is netted out, of Property, Plant, and Equipment for the Equitable Utilities segment.
Property, plant, and equipment, gross, Equitable Utilities
Other non-current liabilities:
Liabilities Other Than Long Term Debt Non-current [Abstract]
Liabilities, Other than Long-term Debt, Noncurrent
Non-current Liabilities, other than long-term debt.
Total other non-current liabilities
Increase (Decrease) in Other Credits
The net change during the reporting period in other credits.
Increase (decrease) in other credits
Regulatory and other assets
Regulatory and Other Assets Non-current [Abstract]
Regulatory and Other Assets, Noncurrent
The summation of Regulatory Assets and Other Assets. Regulatory Assets are the carrying amount as on the balance sheet date of capitalized cost of regulated entities that are expected to be recovered through revenue sources. Such costs are capitalized if they meet both the following criteria: a) It is probable that future revenue is an amount at least equal to the capitalized cost which will result from inclusion of that cost in allowable costs for rate-making purposes. b) Based on available evidence, the future revenue will be provided to permit recovery of the previously incurred cost rather to provide for expected level of similar future costs. If the revenue will be provided through an automatic rate-adjustment clause, this criterion requires that the regulator's intent should clearly permit recovery of the previously incurred cost. Other Assets are the carrying amount as on the balance sheet date of assets which are not disclosed separately in the balance sheet due to materiality considerations.
Total regulatory and other assets
Increase (Decrease) in Regulatory Assets
Regulatory assets
The net change during the period of capitalized costs of regulated entities that are not expected to be recovered through either revenue sources within one year or the normal operating cycle, if longer.
Proceeds from Contribution of Assets
Cash inflows from the contribution of assets to affiliates.
Proceeds from contribution of assets
Proceeds from Sale of Kerr Mcgee Shares
Cash inflows from the sale of Kerr-McGee shares.
Proceeds from sale of Kerr-McGee shares
Net of tax effect change in accumulated gains and losses from Interest Rate derivative instruments designated and qualified as the effective portion of cash flow hedges after taxes. A cash flow hedge is a hedge of the exposure to variability in the cash flows of a recognized asset or liability or a forecasted transaction that is attributable to a particular risk. The change includes an entity's share.
Interest rate
Other Comprehensive Income, Derivatives Qualifying as Hedges, Period Increase (Decrease), Net of Tax, Interest Rate
Other Comprehensive Income, Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax, Kerr McGee
Appreciation or loss in value (before reclassification adjustment) of the total of unsold Kerr-McGee shares during the period being reported on, net of tax. Reclassification adjustments include: (1) the unrealized holding gain or loss, net of tax, on the date of transfer for a debt security being transferred from the held-to-maturity category into the available-for-sale category. It also includes the unrealized gain or loss on the date of transfer for a debt security transferred from the available-for-sale category into the held-to-maturity category; (2) the unrealized gains or losses realized upon the sale of securities, after tax; and (3) the unrealized gains or losses realized upon the write-down of securities, after tax.
Other comprehensive income, unrealized holding gain (loss) on securities arising during period, net of tax, Kerr-McGee
Income (Loss) from Continuing Operations before Income Taxes
Sum of operating income (loss), other non-operating income (loss), and Equity in earnings (losses) of nonconsolidated investments before income taxes.
Income before income taxes
Sale of Properties Disclosure [Text Block]
This element represents the disclosure related to any significant sale of property.
Sale of Properties
Common Stock and Earnings Per Share Disclosure [Text Block]
This element represents the disclosure related to an entity's common stock and earnings per share.
Common Stock and Earnings Per Share
Acquisitions of Properties Disclosure [Text Block]
This element represents the disclosure related to any significant acquisition of property.
Acquisitions
Document and Entity Information
SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS AND RESERVES
Other Events Disclosure [Text Block]
The disclosure of significant events occurring during the period.
Other Events
Statement [Table]
Stockholders' Equity, Period Increase (Decrease), Total
Stockholders' Equity, Period Increase (Decrease)
Stock Issued During Period, Shares, Period Increase (Decrease), Total
Stock Issued During Period, Shares, Period Increase (Decrease)
Depreciation, Depletion and Amortization, Total
Depreciation, depletion and amortization
Depreciation, depletion, and amortization
Depreciation, depletion and amortization
Schedule of Regulatory Assets [Text Block]
Regulatory Assets
Share-based Compensation
Restricted stock and stock option expense
Deposit Liability, Current
Margin deposits from brokers
Net operating revenues (see Note 1)
Gross Profit
Income from discontinued operations, net of tax benefit of $3,246 for the year ended December 31, 2006
Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest
Increase (Decrease) in Operating Capital [Abstract]
Changes in other assets and liabilities:
Increase (Decrease) in Prepaid, Deferred Expense and Other Assets
Prepaid expenses and other
Net Cash Provided by (Used in) Investing Activities, Continuing Operations
Net cash used in continuing investing activities
Comprehensive Income, Net of Tax, Including Portion Attributable to Noncontrolling Interest [Abstract]
Comprehensive income (net of tax):
Comprehensive Income
Common Stock, Dividends, Per Share, Cash Paid
Dividends (in dollars per share)
Total comprehensive income
Comprehensive Income, Net of Tax, Including Portion Attributable to Noncontrolling Interest
Business Combination Disclosure [Text Block]
Acquisitions
Payments to Acquire Interest in Subsidiaries and Affiliates
Capital contributions to Nora Gathering, LLC
Additional equity investments
Payments to Acquire Interest in Joint Venture
Purchase of working interest
Property, Plant and Equipment, Schedule of Significant Acquisitions and Disposals [Text Block]
Sale of Properties
Concentrations of Credit Risk
Concentration Risk Disclosure [Text Block]
Fair Value Disclosures [Text Block]
Fair Value of Financial Instruments
Costs and Expenses [Abstract]
Operating expenses:
Costs and Expenses
Total operating expenses
Payments for Capital Improvements
Tenant improvements
Payments for (Proceeds from) Tenant Allowance
Reimbursements for tenant improvements
Other Comprehensive Income, Defined Benefit Plans Adjustment, Net of Tax
Pension and other post-retirement benefits liability adjustment, net of tax benefit of $1,331, $3,733 and $8,697 during 2010, 2009 and 2008 respectively
Total recognized in other comprehensive income (loss), net of tax
Operating Expenses [Abstract]
Operating Expenses [Abstract]
This element represents the disclosure related to the early termination of several operating leases and the early retirement of assets and leasehold improvements at several locations when the company completed the relocation of its corporate headquarters and other operations to a newly constructed office building.
Office Consolidation Impairment Charges Disclosure [Text Block]
Office Consolidation / Impairment Charges
Payments to Acquire Businesses and Interest in Affiliates, Total
Capital contributions to Nora Gathering, LLC
Stockholders' Equity Attributable to Parent, Beginning Balance
Balance at beginning of period
Balance at end of period
Application of Recognition Provisions of FAS 158, Effect on Accumulated Other Comprehensive Income, Net of Tax
Pension and other post-retirement benefits liability adjustment due to the adoption of SFAS No. 158, net of tax benefit of $0, $0, and $9,988, respectively
Pension and other post-retirement benefits liability adjustment due to the adoption of SFAS No. 158, net of tax benefit of $0, $0, and $9,988, respectively
Comprehensive Income, Net of Tax, Attributable to Parent [Abstract]
Comprehensive income (net of tax).
Comprehensive Income, Net of Tax, Attributable to Parent, Total
Total comprehensive income
Net Income (Loss) Attributable to Parent, Total
Net income
Net Income
Other Comprehensive Income, Minimum Pension Liability Net Adjustment, Net of Tax
Other Comprehensive Income, Minimum Pension Liability Net Adjustment, Net of Tax
Adoption of SFAS 157, Net of Tax
Adoption of SFAS 157, net of tax of $4,774, $0, and $0, respectively
Adoption of SFAS 157, Net of Tax
Minimum pension liability net adjustment, Tax effect
Minimum pension liability net adjustment, Tax effect
Application of Recognition Provision of SFAS 158, Effect on Accumulated Other Comprehensive Income, Tax
Pension and other post-retirement benefits liability adjustment due to the adoption of SFAS No. 158, tax benefit
Total tax effect of the adjustment of accumulated other comprehensive income, net of tax, to reflect the application of SFAS 158 recognition provisions. It excludes the adjustment made to other comprehensive income to eliminate additional minimum pension liability (AML), as well as related intangible assets.
Adoption of SFAS 157, Tax
Adoption of SFAS 157, tax
Adoption of SFAS 157, tax
Derivative Instruments
Investments, Available-For-Sale
Fair Value Measurements
Fair Value, Measurement Inputs, Disclosure [Text Block]
Fair Value Measurements
Income Taxes
Pension and Other Post-retirement Benefit Plans
Other Events.
Long-Term Debt
Office Consolidation Impairment Charges
Expenses related to the early termination of several operating leases and the early retirement of assets and leasehold improvements at several locations when the Company completed the relocation of its corporate headquarters and other operations to a newly constructed office building.
Office consolidation impairment charges
Comprehensive (Loss) Income
Fair Value of Financial Instruments
Public Utilities, Allowance for Funds Used During Construction, Description
Funds Used During Construction
Schedule of Derivative Instruments, Gain (Loss) in Statement of Financial Performance [Text Block]
Derivatives designated and not designated as hedging instruments
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Text Block]
Asset and liability derivatives
Price Risk Derivative Assets, at Fair Value
Total asset derivatives
Price Risk Cash Flow Hedge Asset, at Fair Value
Derivatives designated as hedging instruments
Price Risk Derivative Instruments Not Designated as Hedging Instruments Asset, at Fair Value
Derivatives not designated as hedging instruments
Price Risk Derivative Liabilities, at Fair Value
Total liability derivatives
Price Risk Cash Flow Hedge Liability, at Fair Value
Derivatives designated as hedging instruments
Price Risk Derivative Instruments Not Designated as Hedging Instruments Liability, at Fair Value
Derivatives not designated as hedging instruments
Natural Gas Hedging Instruments
Natural Gas Hedging Instruments [Abstract]
(Gain) Loss, Net of Tax in Other Comprehensive Income De-designated Hedge
Gain or Loss, net of tax, recorded in accumulated other comprehensive loss as of the date of de-designation of hedges.
Loss in accumulated other comprehensive income due to de-designated hedges, net of tax
Gain/ (Loss0 Net of Tax, in Other Comprehensive Income Terminated Collar Agreements
Gain or Loss, net of tax, recorded in accumulated other comprehensive income due to termination of certain collar agreements.
Unrealized hedge gains recorded in accumulated other comprehensive income, net of tax
Percentage of Current Year Production Volume, Hedged
Percentage of expected natural gas production sales volume for the current fiscal year that is hedged for price protection.
Expected natural gas sales volume percentage, price protection (as a percent)
Percentage of expected natural gas production sales volume for the two full fiscal years subsequent to the current fiscal year, that is hedged for price protection.
Percentage of Next Two Fiscal Years Production Volume Hedged
Expected natural gas sales volume percentage for next two years, price protection (as a percent)
Cash Flow Hedges Derivative Instruments at Fair Value, Net [Abstract]
Derivatives designated as hedging instruments
Price Risk Cash Flow Hedge Gain (Loss) Reclassified to Earnings, Net
Amount of gain reclassified from accumulated OCI into income (effective portion), net of tax
Gain (Loss) on Price Risk Hedge Ineffectiveness
Amount of gain (loss) recognized in income (ineffective portion)
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Derivatives not designated as hedging instruments:
Gain (Loss) on Price Risk Derivative Instruments Not Designated as Hedging Instruments
Amount of gain (loss) recognized in income
Price Risk Derivative Gain Loss Reclassified from Accumulated Other Comprehensive Income into Income Cost or Market on Hedged Item
The amount of unrealized hedge gains reclassified into earnings to offset against the lower of cost or market adjustments on hedged items.
Unrealized hedge gains reclassified into earnings
Nonmonetary Notional Amount of Price Risk Cash Flow Hedge Derivatives
Absolute quantities of derivative commodity instruments that have been designated and qualify as cash flow hedges (in Bcf)
Price Risk Cash Flow Hedge Unrealized Gain (Loss) to be Reclassified During Next 12 Months
Net unrealized gains on derivative commodity instruments
Additional Collateral as Percentage of Derivative Liability Upper Limit
The upper limit of the percentage of derivative liability that the entity may be required to post with counterparties.
Additional collateral limit for below investment grade derivative instruments, as a percentage of the derivative liability (as a percent)
Derivative, Net Liability Position, Aggregate Fair Value
Aggregate fair value of derivative instruments with credit-risk related contingencies
Additional Collateral, Aggregate Fair Value
Additional collateral
Asset derivatives
Asset Derivatives [Abstract]
Liability derivatives
Liability Derivatives [Abstract]
Accumulated change, net of tax, in accumulated gains and losses from derivative instruments designated and qualified as the effective portion of cash flow hedges, excluding certain interest rate swap transactions.
Accumulated Other Comprehensive Income Loss, Cumulative Changes in Deferred Net Gain Loss from Cash Flow Hedges Effect, Net of Tax
Deferred net gains in accumulated other comprehensive income (loss), net of tax
Other Derivatives Not Designated as Hedging Instruments Liability at Fair Value
Fair value of offsetting positions not designated as hedges, derivative liability
For de-designated hedges, the fair value of a derivative liability that is not designated or qualified as a hedging instrument.
Other Derivatives Not Designated as Hedging Instruments Asset at Fair Value
Fair value of offsetting positions not designated as hedges, derivative asset
For de-designated hedges, the fair value of a derivative asset that is not designated or qualifying as a hedging instrument.
Available-for-sale Securities [Text Block]
Available-for-sale securities
Schedule of Available-for-sale Securities [Table]
Schedule of Available-for-sale Securities, Major Types of Debt and Equity Securities [Axis]
Investments
Equity funds
Bond funds
Schedule of Available-for-sale Securities [Line Items]
Investments classified as available-for-sale
Available-for-sale Securities, Amortized Cost
Adjusted cost
Fair Value Assets and Liabilities Measured on Recurring Basis Unobservable Input Reconciliation [Table Text Block]
This element represents 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 a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issuances, and settlements (net); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs).
Fair value measurements using significant unobservable inputs (Level 3)
Fair Value Assets and Liabilities Measured on Recurring Basis [Table]
Summary of information required and determined to be disclosed concerning the assets and liabilities, including [financial] instruments that are classified into stockholders' equity, which are measured at fair value on a recurring basis.
Fair Value Assets and Liabilities Measured on Recurring Basis Disclosure Items [Axis]
This element represents the number of concepts which are required or desirable disclosure items concerning assets and liabilities, including [financial] instruments that are classified in stockholders' equity, which are measured at fair value on a recurring basis.
Fair Value Assets and Liabilities Measured on Recurring Basis Disclosure Items [Domain]
This element represents the number of concepts which are required or desirable disclosure items concerning assets and liabilities, including [financial] instruments that are classified into stockholders' equity, which are measured at fair value on a recurring basis.
Fair Value
Quoted prices in active markets for identical assets (Level 1)
Significant other observable inputs (Level 2)
Significant unobservable inputs (Level 3)
Fair value assets and liabilities measured on a recurring basis
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Liabilities [Abstract]
Liabilities
Fair Value by Measurement Occurrence [Axis]
Disclosure of information about assets or liabilities by the type of occurrence of measuring the assets or liabilities at fair value.
Measurement Occurence [Domain]
All types of occurrence of measuring assets or liabilities at fair value. The most frequent types of occurrence are on a recurring basis or on a non-recurring basis.
Recurring Basis
Assets or liabilities measured at fair value on a recurring basis.
Fair Value Assets and Liabilities Measured on Recurring Basis Unobservable Input Reconciliation [Table]
Summary of information required and determined to be provided for purposes of reconciling the beginning and ending balances of fair value measurements of assets and liabilities using significant unobservable inputs (Level 3). Such reconciliation, separately presenting the changes during the period, at a minimum, may include: (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 a description of where those gains or losses are included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issuances, and settlements (net); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs).
Fair Value Assets and Liabilities Measured on Recurring Basis Unobservable Input Reconciliation by Asset Type [Axis]
This element represents the number of concepts which are required or determined to be provided for purposes of reconciling the beginning and ending balances of fair value measurements of assets and liabilities using significant unobservable inputs (Level 3). Such reconciliation, separately presenting changes during the period, at a minimum, may include: (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 a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issuances, and settlements (net); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs).
Fair Value Assets and Liabilities Measured on Recurring Basis Unobservable Input Reconciliation Asset Type [Domain]
This element provides general categories of investment (assets and liabilities) for which 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 which are 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 a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issuances and settlements (net); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs).
Derivative instruments, at fair value, net
This item represents the net of derivative instrument -assets and obligations meeting the definition of an asset or liability which should be reported as on the balance sheet date.
Fair Value Assets and Liabilities Measured on Recurring Basis Unobservable Input Reconciliation by Asset Type
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, by Asset Type [Line Items]
Fair Value Assets Liabilities Measured on Recurring Basis Change in Unrealized Gain Loss Included in Operating Revenues
This item represents the total amount of change in unrealized (holding) gains or losses for the period which are included in the statement of income in operating revenues. Such unrealized (holding) gains or losses relate to those assets and liabilities which are still held at the reporting date for which fair value is measured on a recurring basis using significant unobservable inputs (Level 3).
Earnings attributable to the change in unrealized gains/losses
Fair Value Assets and Liabilities Measured on Recurring Basis Unobservable Input Reconciliation
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, by Asset Type [Roll Forward]
Fair Value Measurement with Unobservable Inputs Reconciliation Recurring Basis Net Value
This element represents the net assets and liabilities measured at fair value using significant unobservable inputs (Level 3) which are required for reconciliation purposes of beginning and ending balances.
Balance at beginning of year
Balance at end of year
Fair Value Measurement with Unobservable Inputs Reconciliation Recurring Basis Net Asset Liability Gain Loss Included in Earnings
This element represents the total gains or losses for the period (realized and unrealized), arising from net assets and liabilities measured at fair value on a recurring basis using unobservable inputs (Level 3), which are included in earnings or result in a change in net asset value.
Total gains or losses included in earnings
Fair Value Measurement with Unobservable Inputs Reconciliation Recurring Basis Net Asset Liability Gain Loss Included in Other Comprehensive Income
This element represents total gains or losses for the period (realized and unrealized), arising from net assets and liabilities measured at fair value on a recurring basis using unobservable inputs (Level 3), which are included in other comprehensive income (a separate component of shareholders' equity).
Total gains or losses included in other comprehensive income
Fair Value Measurement with Unobservable Inputs Reconciliation Recurring Basis Net Asset Liability Purchases Sales Issuances Settlements
This element represents the purchases, sales, issuances, and settlements (net) which have taken place during the period, in relation to net assets and liabilities measured at fair value on a recurring basis using unobservable inputs (Level 3).
Purchases, issuances, and settlements
Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax
Net unrealized gain from hedging transactions
Accumulated Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax
Unrealized gain on available-for-sale securities
Accumulated Other Comprehensive Income (Loss), Defined Benefit Pension and Other Postretirement Plans, Net of Tax
Pension and other post-retirement benefits liability adjustment
Net amount recognized
Other comprehensive (loss) income:
Pension and other post-retirement benefit plans:
Other Comprehensive Income, Defined Benefit Plan, Net Prior Service Costs (Credit) Arising During Period, Net of Tax
Net prior service (credit) cost
Other Comprehensive Income, Defined Benefit Plan's Net Unamortized (Gain) Loss Arising During Period, Net of Tax
Net (gain) loss
Other Comprehensive Income Defined Benefit Plans Settlement Gain Loss Arising During Period Net of Tax
The accumulated change in the value of either the projected benefit obligation or the plans assets resulting from settlement of an obligation that has not been recognized in net periodic benefit cost, after tax.
Settlement loss
Disclosure of Share-based Compensation Arrangements by Share-based Payment Award [Text Block]
Share-based compensation expense (income)
Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table]
Schedule of Share-based Compensation Arrangement by Share-based Payment Award, Award Type and Plan Name [Axis]
Share-based compensation expense
The entity's 2005 Executive Performance Incentive Program.
2005 Executive Performance Incentive Program
2008 Executive Performance Incentive Program
The entity's 2008 Executive Performance Incentive Program.
2009 Shareholder Value Plan
The entity's 2009 Shareholder Value Plan.
2007 Supply Long-Term Incentive Program
The entity's 2007 Supply Long-Term Incentive Program.
Restricted Stock Awards
Restricted stock award plan.
Non-Qualified Stock Options
Non-qualified stock option plan.
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense (income) recorded by the company
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost
Total compensation cost recorded, including capitalized portion
The payout achievement as a percentage of the target award.
Compensation plan, achievement as a percentage of target award level (as a percent)
Share Based Compensation Arrangement by Share Based Payment Award Payout Multiple
This element represents the low end of the payout multiple based upon performance during the performance period.
Payout multiple percent, low end of range (as a percent)
Share Based Compensation Arrangement by Share Based Payment Award Payout Multiple Low Range
This element represents the high end of the payout multiple based upon performance during the performance period.
Payout multiple percent, high end of range (as a percent)
Share Based Compensation Arrangement by Share Based Payment Award Payout Multiple High Range
This element represents the performance period (in years), upon which the payout multiple percent is dependent under the plan.
Performance period (in years)
Share Based Compensation Arrangement by Share Based Payment Award Payout Performance Period Number
The amount by which the actual payment per unit will be reduced.
Threshold value (in dollars per share)
Share Based Compensation Arrangement by Share Based Payment Award Threshold Value
The threshold percentage which approximates the threshold value which represents the entity's total shareholder return relative to the predefined peer group.
Threshold value multiple percent (as a percent)
Share Based Compensation Arrangement by Share Based Payment Award Threshold Value Multiple
The minimum payout multiple based on a shareholder return ranking being achieved.
Share Based Compensation Arrangement by Share Based Payment Award Assumed Performance Level Payout Multiple
Payout factor percent (as a percent)
Minimum payout multiple if median or above shareholder return ranking achieved (as a percent)
Additional share-based compensation expense incurred during the period if the high-end of the payout multiple range is achieved, using the current assumed period-end stock multiple.
Share Based Compensation Arrangement by Share Based Payment Award Additional Compensation Cost
Additional compensation cost
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period
Shares granted, number (in shares)
Non-vested shares, Granted (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period
Grants in period (in shares)
Non-qualified Stock Options, Granted (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value
Weighted Average Fair Value of shares, Vested (in dollars per share)
Employee Service Share-based Compensation, Unrecognized Compensation Costs on Nonvested Awards
Unrecognized compensation costs on non-vested awards
Employee Service Share-based Compensation, Unrecognized Compensation Costs on Nonvested Awards, Weighted Average Period of Recognition
Unrecognized compensation costs on non-vested awards, weighted average period of recognition (in years)
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount
Options to purchase shares of common stock excluded in the computation of diluted earnings per common share (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number
Non-vested shares Outstanding, Beginning of Period (in shares)
Non-vested shares Outstanding, End of Period (in shares)
Share units outstanding (in shares)
Income Tax Examination [Table]
Income Tax Examination [Line Items]
Income Taxes:
Effective Income Tax Rate, Continuing Operations
Effective income tax rate (as a percent)
Effective tax rate (as a percent)
Estimated annual effective tax rate percentage (as a percent)
Estimated Annual Effective Tax Rate for Current Year
Estimated annual effective tax rate for current year which is calculated by dividing the reported amount of income tax expense attributable to continuing operations for the period by GAAP-basis pretax income from continuing operations.
The estimated percentage reduction in the income tax rate which will apply to the reporting period if the Internal Revenue Service approves the request for a method change.
Effective Income Tax Rate Pending Reduction Change in Method
Estimated annual effective income tax rate (as a percent)
Income Tax Reconciliation, Change in Enacted Tax Rate
Tax benefit from decrease in deferred tax liability, West Virginia tax rate reduction
Additional tax expense from increase in deferred tax liability, West Virginia tax rate increase
Proceeds from Income Tax Refunds
Income tax refunds
Income Tax Examination by Jurisdiction [Axis]
Income Tax Authority [Domain]
IRS Audit 1998 to 2000
The period 1998-2008 for which an audit was performed by the IRS.
IRS Audit 2001 to 2005
The period 2001-2005 for which an audit was performed by the IRS.
IRS 2008 Net Operating Loss Claim
The 2008 claim submitted to the IRS relating to a net operating loss.
Schedule of Long-term Debt Instruments [Text Block]
Long-Term Debt
Long-term Debt, Total
Long-term debt
Schedule of Long-term Debt Instruments [Table]
Debt Instrument [Axis]
Debt Instruments
5.15% notes, due November 15, 2012
A contractual arrangement to borrow and repay an amount under a long-term note at an interest rate of 5.15% which is due on November 15, 2012.
5.00% notes, due October 1, 2015
A contractual arrangement to borrow and repay an amount under a long-term note at an interest rate of 5.00% which is due on October 1, 2015.
6.50% notes, due April 1, 2018
A contractual arrangement to borrow and repay an amount under a long-term note at an interest rate of 6.50% which is due on April 1, 2018.
7.75% debentures, due July 15, 2026
A contractual arrangement to borrow and repay an amount under debentures at an interest rate of 7.75% which is due on July 15, 2026.
Medium-term notes, 7.3% to 7.6% Series B, due 2013 thru 2023
Series B medium-term notes, 7.3% to 7.6% with maturities due in 2013 thru 2023.
Medium-term notes, 7.6% Series C, due 2018
Series C medium-term notes, 7.6% due in 2018.
5.15% notes, due March 1, 2018
A contractual arrangement to borrow and repay an amount under a long-term note at an interest rate of 5.15% which is due on March 1, 2018.
Debt Instrument [Line Items]
Long term debt
Debt Instrument, Interest Rate, Stated Percentage
Debt instrument, stated interest rate percentage (as a percent)
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Minimum
Debt instrument, stated interest rate percentage minimum (as a percent)
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Maximum
Debt instrument, stated interest rate percentage maximum (as a percent)
Defined Benefit Plan, Net Periodic Benefit Cost
Net periodic benefit cost
Defined Benefit Plan, Service Cost
Service cost
Defined Benefit Plan, Interest Cost
Interest cost
Defined Benefit Plan, Expected Return on Plan Assets
Expected return on plan assets
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)
Amortization of prior service cost
Defined Benefit Plan, Actuarial Net (Gains) Losses
Actuarial loss (gain)
Defined Benefit Plan, Recognized Net (Gain) Loss Due to Settlements
Settlement loss
Settlement expense recognized, Kentucky West Virginia
Schedule of Defined Benefit Plans Disclosures [Table]
Defined Benefit Plans Disclosures, Defined Benefit Plans [Axis]
Defined Benefit Plans
Pension Benefits
Other Benefits
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plans costs
Long Term Debt Fair Value
The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.
Estimated fair value of long-term debt
Other Events
Other Asset Impairment Charges
Impairment expense
Debt Instrument, Face Amount
Aggregate principal amount
Schedule of Segment Reporting Information, by Segment [Table]
Segment Reporting Information, by Segment [Axis]
Reporting Segment [Domain]
Total operating segments
The aggregate of the entity's reporting segments.
EQT Production
The reporting segment of the entity which includes the entity's exploration for, and development and production of, natural gas and a limited amount of crude oil in the Appalachian Basin.
EQT Midstream
The reporting segment of the entity which includes the natural gas gathering, processing, transportation and storage activities of the entity as well as sales of natural gas liquids.
Distribution
The reporting segment of the entity which comprise the state-regulated distribution activities of the entity.
Unallocated
This element represents the difference between budget and actual headquarters' expenses which are not allocated to the operating segments.
Eliminations
Segment Reporting Information [Line Items]
Operating segments information
Segment Reporting, Number of Segments
Number of segments
The number of segments in the entity's operations.
Reconciliation of operating income to net income
Reconciliation of Operating Income to Net Income [Abstract]
Statement, Scenario [Axis]
Scenario, Unspecified [Domain]
Summary of Significant Accounting Policies
Financial Information by Business Segment
Sale of Properties
Acquisitions
Equity in Nonconsolidated Investments
Regulatory Assets.
Short-Term Loans
Common Stock and Earnings Per Share
Share-Based Compensation Plans
Concentrations of Credit Risk
Commitments and Contingencies
Guarantees
Office Consolidation / Impairment Charges
Natural Gas Producing Activities (Unaudited)
Recently Issued Accounting Standards
Financial Statements
Discontinued Operations
Funds Used During Construction
Total investments
Available-for-sale Securities, Equity Securities
Fair Value of Equity funds
Available-for-sale Securities, Debt Securities
Fair Value of Bond funds
8.13% notes, due June 1, 2019
A contractual arrangement to borrow and repay an amount under a long-term note at an interest rate of 8.13% which is due on June 1, 2019.
Medium-term notes, 8.5% to 9.0% Series A, due 2011 thru 2021
Series A medium-term notes, 8.5% to 9% with maturities due in 2009 thru 2021.
Schedule of Guarantee Obligations [Table]
Guarantee Obligations By Nature [Axis]
Guarantee Obligations Nature [Domain]
Guarantee Type Other
Liquidity reserve guarantee
This element represents guarantees provided by the entity in the form of liquidity reserve guarantee to the unconsolidated VIE.
Guarantee Obligations Maximum Exposure
Undiscounted maximum aggregate payments related to guarantees
Guarantee Obligations Term
Guarantee obligations term (in years)
Guarantee Obligations under Associated Contracts Maximum Exposure
Portion of the other guarantee obligations that relates to work completed under the associated underlying contracts
This element represents the maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantees for which work has already been completed under the associated contracts.
Guarantee Obligations Termination Amount
Portion of the other guarantee obligations that will end or be terminated within the next fiscal year
This element represents the amount of guarantee obligations which will end or be terminated not later than the close of the next reporting year.
Purchasers Loss Reimbursement Obligation Maximum Exposure
NORESCO purchaser's obligation for loss reimbursement to the company, maximum exposure
This element represents the maximum amount of loss which the purchaser of NORESCO agrees to reimburse to the entity in meeting its guarantee obligations.
Purchasers Obligations Letter of Credit
Third party letter of credit amount supporting the NORESCO purchaser's guarantee obligations
This element represents the amount of the letter of credit issued by the third party purchaser of NORESCO supporting loss reimbursements for guarantee obligations of the entity.
Variable Interest Entity Unconsolidated VIE Debt
The long-term debt of the unconsolidated VIE, ANPI
This element represents the total long-term debt, including current maturities, of the variable interest entity that is not consolidated within the company's statement of financial position.
Reserved Authorized and Unissued Common Stock [Text Block]
Reserved authorized and unissued common stock
Schedule of the aggregate number of common shares reserved for future issuance.
Reserved Authorized and Unissued Common Stock
Reserved Authorized and Unissued Common Stock [Abstract]
Reserved Authorized and Unissued Common Stock Possible Future Acquisitions
Possible future acquisitions (in shares)
This element represents the number of shares of the entity's authorized and unissued common stock reserved for possible future acquisitions.
Reserved Authorized and Unissued Common Stock Compensation Plans
Stock compensation plans (in shares)
This element represents the number of shares of the entity's authorized and unissued common stock reserved for stock compensation plans.
Weighted Average Number Diluted Shares Outstanding Adjustment [Abstract]
Potentially dilutive securities:
Incremental Common Shares Attributable to Share-based Payment Arrangements
Stock options and awards
Line of Credit Facility, Maximum Borrowing Capacity
Revolving credit facility maximum borrowing capacity
Line of Credit Facility Maximum Borrowing Capacity before Replacement
Revolving credit facility before replacement
This element represents the maximum borrowing capacity under the entity's line of credit facility before replacement by a new line of credit.
Line of Credit Facility Extensions Number
Number of times the maturity date of the credit facility can be extended by one year
This element represents the number of times the line of credit facility can be requested to be extended.
Line of Credit Facility Approval Percentage
Percentage required for the approval of extension of credit facility by the underwriters (as a percent)
This element represents the percentage of lenders underwriting the credit facility required for the approval of extension of maturity of credit facility.
Line of Credit Facility Potential Increase in Lenders Commitment
Aggregate potential increased lenders' commitment
This element represents the potential aggregate amount of commitments which the entity may request from its lenders.
Underwriting Financial Institutions Number
Number of financial institutions underwriting credit facility of the entity
This element represents the number of financial institutions funding the borrowings of the entity on a pro-rata basis.
Line of Credit Facility Maximum Commitment by a Member of Syndicate
Maximum commitment of Lehman Brothers under credit facility
This element represents the maximum amount of funding commitment by a syndicate member who failed to fund its portion of recent borrowings.
Line of Credit Facility, Current Borrowing Capacity
The current borrowing capacity of the entity under the facility
Line of Credit Facility, Amount Outstanding
Revolving credit facility outstanding amount at the end of period
Short-term loans
Financial Stand by Letter of Credit Amount Outstanding
Irrevocable letter of credit outstanding amount at the end of period
Amount outstanding under the facility for standby letters of credit as of the balance-sheet date.
Letter of credit outstanding
Line of Credit Facility Commitment Fee Average Percentage
Commitment fee paid to maintain credit facility (as a percent)
This element represents the average percentage of commitment fees paid, which are based on the total availability under the credit facility.
Short-term Debt, Weighted Average Interest Rate
Weighted average interest rates for short-term loans outstanding (as a percent)
Recovery of Demand Charges
Demand charges recoverable in customer rates
This element represents the amount of future payments for demand charges with various pipelines that is recoverable in customer rates.
Revenues from external customers:
Segment Reporting Segment Assets
Segment assets
Segment Reporting Reconciling Items Assets
Headquarters assets, including cash and short-term investments
Reconciliation of operating income to net income:
Segment Reporting Information, Expenditures for Additions to Long-Lived Assets
Expenditures for Segment Assets
Expenditures for segment assets for undeveloped property acquisitions
Expenditures for Segment Assets for Undeveloped Property Acquisitions
This element represents expenditures for undeveloped property acquisitions.
Expenditures for segment assets for the acquisition of additional working interest and related gathering assets in the Roaring Fork area
Expenditures for Segment Assets for the Acquisition of Additional Working Interest and Related Gathering Assets in the Roaring fork Area
This element represents expenditures for segment assets for the acquisition of additional working interest and related gathering assets in the Roaring Fork area.
Equity in the nonconsolidated investments
Equity Method Investments Text Block
Equity Method Investment Summarized Financial Information Statement of Financial Position [Text Block]
Unaudited condensed balance sheet for nonconsolidated investments accounted for under the equity method of accounting
This element represents the summary of unaudited condensed statement of financial position for unconsolidated investments accounted for under the equity method of accounting.
Equity Method Investment Summarized Financial Information Income Statement [Text Block]
Unaudited condensed statements of income for nonconsolidated investments accounted for under the equity method of accounting
This element represents the unaudited condensed statements of income for unconsolidated investments accounted for under the equity method of accounting.
Schedule of Equity Method Investments
Equity Method Investee, Name
Nora Gathering, LLC
This element represents the investment in Nora Gathering, LLC (Nora LLC) which is accounted for, under the Equity method of accounting.
Appalachian Natural Gas Trust
This element represents the investment in Appalachian Natural Gas Trust (ANGT) which is accounted for, under the Equity method of accounting.
Schedule of Equity Method Investments [Line Items]
Equity in Nonconsolidated Investments.
Equity Method Investment, Ownership Percentage
Ownership percentage (as a percent)
Company's equity ownership percentage (as a percent)
Equity Method Investment, Summarized Financial Information [Abstract]
Summarized Balance Sheets
Equity Method Investment, Summarized Financial Information, Current Assets
Current assets
Equity Method Investment, Summarized Financial Information, Noncurrent Assets
Noncurrent assets
Equity Method Investment, Summarized Financial Information, Assets
Total assets
Equity Method Investment, Summarized Financial Information, Current Liabilities
Current liabilities
Equity Method Investment, Summarized Financial Information, Equity or Capital
Stockholders' equity
Equity Method Investment, Summarized Financial Information, Liabilities and Equity
Total liabilities and stockholders' equity
Equity Method Investment, Summarized Financial Information, Income Statement [Abstract]
Summarized Statements of Income
Equity Method Investment, Summarized Financial Information, Net Sales or Gross Revenue
Revenues
Equity Method Investment, Summarized Financial Information, Cost of Sales or Revenue
Costs and expenses applicable to revenues
Equity Method Investment, Summarized Financial Information, Gross Profit (Loss)
Net revenues
Equity Method Investment Summarized Financial Information Operating Expenses
Operating expenses
This element represents the operating expenses of entities accounted for, under the equity method of accounting.
Equity Method Investment, Summarized Financial Information, Net Income (Loss)
Net income
Proved Undeveloped Properties Tenure
Timeframe under new FASB rules to develop existing proved undeveloped locations (in years)
This element represents the number of years that the new FASB rules suggest as a reasonable timeframe to develop existing proved undeveloped locations.
Capitalized Costs, Oil and Gas Producing Activities, Net [Abstract]
Capitalized costs oil and gas producing activities net
Capitalized Costs, Oil and Gas Producing Activities, Gross
Capitalized costs
Oil and gas producing properties, successful efforts method
Capitalized Costs, Accumulated Depreciation, Depletion, Amortization and Valuation Allowance for Relating to Oil and Gas Producing Activities
Accumulated depreciation and depletion
Capitalized Costs, Oil and Gas Producing Activities, Net
Net capitalized costs
Costs Incurred, Acquisition of Oil and Gas Properties [Abstract]
Costs incurred for acquisition of oil and gas properties
Property acquisition:
Property Acquisition Cost [Abstract]
Costs Incurred, Acquisition of Oil and Gas Properties with Proved Reserves
Proved properties
Costs Incurred, Acquisition of Unproved Oil and Gas Properties
Unproved properties
Costs Incurred, Exploration Costs
Exploration
Costs Incurred, Development Costs
Development
Results of Operations, Revenue from Oil and Gas Producing Activities [Abstract]
Revenues:
Results of Operations, Sales or Transfers to Entity's Other Operations
Affiliated
Results of Operations, Sales Revenue to Unaffiliated Enterprises
Nonaffiliated
Results of Operations, Depreciation, Depletion and Amortization, and Valuation Provisions
Depreciation, depletion and accretion
Results of Operations, Income Tax Expense
Income tax expense
Results of Operations, Oil and Gas Producing Activities Net Income (Excluding Corporate Overhead and Interest Costs)
Results of operations from producing activities (excluding corporate overhead)
Distribution Channel [Axis]
This element represents the concept which holds the key information presented in the schedule of distributions.
Proved Developed and Undeveloped Oil and Gas Reserve Quantities [Table]
Reserve Quantities by Type of Reserve [Axis]
Type of Reserve [Domain]
Distribution Channel [Domain]
This element represents the distribution channels of the entity.
Columbia Gas Transmission Corp
This element represents the closing prices per Dth as on the first day of each month for Columbia Gas Transmission Corp.
Dominion Transmission, Inc
This element represents the closing prices per Dth as on the first day of each month for Dominion Transmission, Inc.
East Tennessee Natural Gas Pipeline
This element represents the closing prices per Dth as on the first day of each month for East Tennessee Natural Gas Pipeline.
Transcontinental Gas Pipe Line Corp
This element represents the closing prices per Dth as on the first day of each month for Transcontinental Gas Pipe Line Corp.
Distribution Channel
Distribution Channel [Abstract]
Price Used in Computation of Oil and Gas Reserves
Prices used in calculation of reserves (in dollars per Dth)
This element represents the price per Dth that was used in the calculation of oil and gas reserves at the end of the period.
Reserve Quantities [Line Items]
Reserve Quantities
Increase (Decrease) in Proved Developed and Undeveloped Reserves [Roll Forward]
Proved developed and undeveloped reserves:
Proved Developed and Undeveloped Reserves, Net
Beginning of year
End of year
Proved Developed and Undeveloped Reserves, Revisions of Previous Estimates Increase (Decrease)
Revision of previous estimates
Proved Developed and Undeveloped Reserves, Purchases of Minerals in Place
Purchase of reserves in place
Additional purchase of proved reserves (in Bcf)
Proved Developed and Undeveloped Reserves, Sales of Minerals in Place
Sale of reserves in place
Proved Developed and Undeveloped Reserves, Extensions, Discoveries, and Additions
Extensions, discoveries and other additions
Proved Developed and Undeveloped Reserves, Production
Production
Proved developed reserves:
Proved Developed Reserve [Abstract]
Engineer Experience in Years
Experience of primary Company engineer (in years)
This element represents the number of years experience in the oil and gas industry for the entity's engineer primarily responsible for the technical aspects of the oil and gas reserves audit.
Gas and Liquid Carbon Reserves Reviewed Percentage
Independent audit review percentage of total gas and hydrocarbon reserves (as a percent)
This element represents the percentage of total net gas and liquid hydrocarbon reserves reviewed by an independent consulting firm.
Audit Coverage of Proved Reserves Percentage
Percentage of proved reserves covered by a detail, well by well, independent audit (as a percent)
This element represents the percentage of proved reserves covered by a detailed, well by well, independent audit.
Audit Coverage of Remaining Properties Percentage
Percentage of properties covered by an independent audit of aggregated groups of wells (as a percent)
This element represents the percentage of properties of the entity covered by an independent audit of aggregated groups of wells.
Wells Covered Under Audit Number Maximum
Maximum number of wells per group in the independent audit of aggregated groups
This element represents the maximum number of wells included in each group under the aggregate groups audit.
Production of Natural Gas Equivalents
Actual production (in Bcfe)
This element represents the actual production of natural gas, as well as oil production stated in equivalent amounts of natural gas.
Increase in Reserves of Natural Gas Equivalents
Increase in reserves due to extensions, discoveries and other additions (in Bcfe)
This element represents the increase in reserves of natural gas (including oil stated in equivalent amounts of natural gas) through extensions, discoveries and other additions.
Increase in Reserves of Natural Gas Equivalents due to Drilling of Qualified Reserve Extensions Discoveries and Other Additions
Increase in reserves of natural gas equivalents due to drilling of qualified reserve extensions, discoveries and other additions (in Bcfe)
This element represents the increase in reserves of natural gas (including oil stated in equivalent amounts of natural gas) through additional drilling prior to the enactment of new rules.
Increase in Reserves of Natural Gas Equivalents to Offset Well Drilling
Increase in reserves from offset well drilling (in Bcfe)
This element represents the increase in reserves of natural gas (including oil stated in equivalent amounts of natural gas) from additional drilling to offset locations from additional wells drilled prior to the enactment of new rules.
Price Used in Computation of Reserves
Price per barrel used in computation of reserves (in dollars per Bbl)
This element represents the price per barrel that was utilized in the computation of oil and gas reserves.
Decrease in Year End Price Oil and Gas
Decrease in natural gas equivalent year end price (in dollars per Dth)
This element represents the decline in year end prices in dollars per million British thermal units (in Dth).
Sale of Proved Reserves Gas Properties
Sale of interest in gas properties of proved reserves (in Bcf)
This element represents the sale of the entity's interest in gas properties pertaining to proved reserves.
Purchase of Additional Working Interest
Purchase of additional working interest (as a percent)
This element represents the percentage of additional interest in gas properties purchased during the period (in hundredths).
Reserves Classified as Proved Undeveloped Maximum Years
Maximum period for which reserves are classified as proved undeveloped (in years)
This element represents the maximum number of years for which the Company has reserves classified as proved undeveloped.
Drilling Plan Tenure
Term of the Company's drilling plan (in years)
This element represents the term of the Company's drilling plan (in years).
Discount Rate to Compute Standard Measure of Future Cash Flow
Discount rate percentage (as a percent)
This element represents the discount rate which is used in the standard measure of future cash flows calculations.
Discounted Future Net Cash Flows Relating to Proved Oil and Gas Reserves, Future Cash Inflows
Future cash inflows
Discounted Future Net Cash Flows Relating to Proved Oil and Gas Reserves, Future Production Costs
Future production costs
Discounted Future Net Cash Flows Relating to Proved Oil and Gas Reserves, Future Development Costs
Future development costs
Discounted Future Net Cash Flows Relating to Proved Oil and Gas Reserves Future Cash Flow before Income Taxes
Future net cash flow before income taxes
This element represents the future net cash flow before income taxes relating to proved oil and gas reserves.
Discounted Future Net Cash Flows Relating to Proved Oil and Gas Reserves Net of Discounting before Income Taxes
Discounted future net cash flows before income taxes
This element represents the future net cash flow before income taxes relating to proved oil and gas reserves.
Discounted Future Net Cash Flows Relating to Proved Oil and Gas Reserves 10 Percent Annual Discount for Future Income Tax Expense
Future income tax expenses, discounted at 10% annually
This element represents the amount that is derived from using a discount rate of ten percent per year to reflect the timing of the future income tax expenses relating to proved oil and gas reserves.
Discounted Future Net Cash Flows Relating to Proved Oil and Gas Reserves, Standardized Measure
Standardized measure of discounted future net cash flows
Discounted Future Net Cash Flows Relating to Proved Oil and Gas Reserves Change in Price of Natural Gas Sensitivity
Change in price of natural gas used in sensitivity analysis (in dollars per Dth)
This element represents the change in price of natural gas (in dollars per Dth) used in the sensitivity analysis for proved future net cash flows.
Discounted Future Net Cash Flows Relating to Proved Oil and Gas Reserves Change in Price of Oil Sensitivity
Change in price of oil used in sensitivity analysis (in dollars per Bbl)
This element represents the change in price of oil (in dollars per Bbl) used in the sensitivity analysis for proved future net cash flows.
Change in Discounted Future Cash Flows for Assumed Natural Gas Price Change
Change in discounted future cash flows for natural gas if assume $1 per Dth price change
This element represents the change in discounted future cash flows for natural gas due to an assumed change in price.
Change in Discounted Future Cash Flows for Assumed Oil Price Change
Change in discounted future cash flows for oil if assume $10 per barrel price change
This element represents the change in discounted future cash flows for oil due to an assumed change in price.
Sales and Transfers of Oil and Gas Produced, Net of Production Costs
Sales and transfers of natural gas and oil produced - net
Net Increase (Decrease) in Sales and Transfer Prices and Production Costs
Net changes in prices, production and development costs
Extensions, Discoveries, Additions and Improved Recovery, Less Related Costs
Extensions, discoveries and improved recovery, less related Costs
Increase (Decrease) in Estimated Future Development Costs
Development costs incurred
Increase Due to Purchases of Minerals in Place
Purchase of minerals in place - net
Decrease Due to Sales of Minerals in Place
Sale of minerals in place - net
Revisions of Previous Quantity Estimates
Revisions of previous quantity estimates
Accretion of Discount
Accretion of discount
Increase (Decrease) in Future Income Tax Expense Estimates on Future Cash Flows Related to Proved Oil and Gas Reserves
Net change in income taxes
Other Changes in Standardized Measure of Discounted Future Net Cash Flows
Timing and other
This element represents the other changes in the standardized measure of discounted future net cash flows relating to proved oil and gas reserves.
Standardized Measure of Discounted Future Net Cash Flow of Proved Oil and Gas Reserves, Period Increase (Decrease)
Net increase (decrease)
Natural Gas
Oil
Roaring Fork area
This element represents the purchase of certain gas properties in the Roaring Fork area in Virginia.
Oil and Gas Proved Developed Reserves
Oil and gas proved developed reserves (in Bcf)
This element represents the oil and gas proved developed reserves.
Oil and Gas Proved Undeveloped Reserves
Oil and gas proved undeveloped reserves (in Bcf)
This element represents the oil and gas unproved developed reserves.
Dominion Resources, Inc.'s (Dominion)
This element represents the purchase of certain gas properties in the Dominion Resources Inc in Virginia.
Business Acquisition, Percentage of Voting Interests Acquired
Percentage of voting interests acquired (as a percent)
Business Combination, Acquisition Related Costs
Total acquisition related costs
Amortization of Acquisition Costs
Deferred acquisition costs
Schedule of Business Acquisitions, by Acquisition [Table]
Business Acquisition [Axis]
Business Acquisition, Acquiree [Domain]
Schedule of Regulatory Assets [Table]
Regulatory Asset [Axis]
Regulatory Asset [Domain]
Deferred taxes
Deferred purchased gas costs
Other post-retirement benefits other than pensions
Discloses the amount of regulatory assets related to postretirement benefit costs.
Transmission pipeline integrity costs
This element represents the capitalized portion of regulated transmission pipeline integrity costs.
Delinquency Reduction Opportunity Program
This element represents the assets related to the Delinquency Reduction Opportunity Program.
Other.
This element represents the other regulatory assets not specified elsewhere in the taxonomy.
Regulatory Assets [Line Items]
Regulatory Asset
Regulatory Assets
Total regulatory assets
Regulatory Assets, Current
Amounts classified as other current assets
Unrealized Gain Loss on Derivative Contracts Designated as Cash Flow Hedges Netted Against Regulatory Asset
Unrealized gains on derivative contracts designated as cash flow hedges
This element represents the amount of unrealized gains on derivative contracts designated as cash flow hedges that was recorded as a reduction in regulatory assets rather than in other comprehensive income because of their probable recovery through rates.
Amortization of Post Retirement Benefits Other than Pensions Used for Rate Making
Amortization of post-retirement benefits other than pensions used for rate making purpose
This element represents the amount of amortization during the period for post retirement benefits other than pensions, which are subject to recovery through rates.
Percentage of Year One Fiscal Year Production Volume Hedged
Expected natural gas sales volume price protection hedge percentage for 2010 (as a percent)
Percentage of expected natural gas production sales volume during the twelve-month period following the balance sheet date that is hedged for price protection.
Percentage of Year Two Fiscal Year Production Volume Hedged
Expected natural gas sales volume price protection hedge percentage for 2011 (as a percent)
Percentage of expected natural gas production sales volume during the second twelve-month period following the balance sheet date that is hedged for price protection.
Percentage of Year Three Fiscal Year Production Volume Hedged
Expected natural gas sales volume price protection hedge percentage for 2012 (as a percent)
Percentage of expected natural gas production sales volume during the third twelve-month period following the balance sheet date that is hedged for price protection.
Concentration Risk [Table]
Concentration Risk [Line Items]
Concentration Risk
Concentration Risk, Percentage to Particular Customer
Concentration of revenue risk related to one marketer (as a percent)
Discloses concentration risk for an entity, in relation to quantitative amount to a particular marketer.
Entity Number of Customers
Number of customers
This element represents the total number of residential, commercial and industrial customers of the company.
Accounts Receivable, Marketer Percentage
Accounts receivable from marketers, percent (as a percent)
This element represents the percentage of overall accounts receivable due from marketers.
Derivative Counterparty, Bankruptcy Reserves
The amount of reserves established by the entity related to the bankruptcy filing of a counterparty.
Derivative contract reserves related to Lehman Brothers bankruptcy filing
Sale of Proved Developed Reserves
Sale of proved developed reserves (in Bcf)
This element represents the sale of proved developed reserves by the entity.
Proceeds from Divestiture of Businesses
Net proceeds after purchase price adjustments
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Table]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Axis]
Schedule of Equity Method Investment, Equity Method Investee, Name [Axis]
Disposal Groups, Including Discontinued Operations, Name
Pine Mountain Oil and Gas, Inc. (PMOG)
This element represents an agreement of the company with Pine Mountain Oil and Gas, Inc. (PMOG) to sell to PMOG a portion of the Company's interests in certain gas properties in the Nora area.
Equity Method Investment, Net Sales Proceeds
Sale proceeds received on equity method investments
Gain (Loss) on Disposition of Assets
Gain loss on sale of assets
Gain (Loss) on Oil and Gas Hedging Activity
Hedge loss
Reduction in Hedge Position due to Sale of Properties
Reduction in company's hedge position (in Bcf)
This element represents the reduction in company's hedge position due to the sale of properties.
Equity Method Investment, Realized Gain (Loss) on Disposal
Loss on sale of equity method investment contribution
Due to Related Parties
Loan taken from affiliates
Schedule of Share-Based Compensation Restricted Stock Units Award Activity [Table Text Block]
Summary of restricted stock awards activity during the period
Disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year.
Schedule of Share-Based Compensation Stock Options Activity [Table Text Block]
Summary of option activity
Disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year.
Incentive Plan [Axis]
This element represents the Non-employee Directors' Stock Incentive Plan.
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit
Non-qualified Stock Options, Exercise price, low end range (in dollars per share)
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit
Non-qualified Stock Options, Exercise price, upper end range (in dollars per share)
Share Based Compensation Arrangement by Share Based Payment Award Options Outstanding Grant Expiration Period Lower Range Limit
Non-qualified Stock Options, Expiration period of grant, low end range (in years)
This element represents the lower-end range of the period of expiration of the grant which may be expressed in a decimal value for a number of years.
Share Based Compensation Arrangement by Share Based Payment Award Options Outstanding Grant Expiration Period Upper Range Limit
Non-qualified Stock Options, Expiration period of grant, upper end range (in years)
This element represents the upper-end range of the period of expiration of the grant which may be expressed in a decimal value for a number of years.
Share Based Compensation Arrangement by Share Based Payment Award Equity Instruments Other than Options Vested at End of One Year in Percentage
Award vested at end of year one, percentage (as a percent)
This element represents the percentage of the stock-based award which will vest at the end of year one.
Share Based Compensation Arrangement by Share Based Payment Award Equity Instruments Other than Options Vested at End of Two Year in Percentage
Award vested at end of year two, percentage (as a percent)
This element represents the percentage of the stock-based award which will vest at the end of year two.
Share Based Compensation Arrangement by Share Based Payment Award Equity Instruments Other than Options Vested at End of Three Year in Percentage
Award vested at end of year three, percentage (as a percent)
This element represents the percentage of the stock-based award which will vest at the end of year three (in hundredths).
2010 Executive Performance Incentive Plan
This element represents the entity's 2010 Executive Performance Incentive Plan.
2010 Stock Incentive Award program
This element represents the entity's 2010 Stock Incentive Award program
2010 Stock Options
This element represents the entity's 2010 Stock Option Plan.
Non-Qualified Stock Options, assumptions used to value share-based compensation
Disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions.
Schedule of Share-Based Payment Award Stock Options Valuation Assumptions [Table Text Block]
Incentive Plan
This element represents the incentive plan under the Non-employee Directors' Stock Incentive Plan.
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Total Fair Value
Fair value of restricted stock awards vested
Aggregate Fair Value of shares, Vested
Value of vested stock-based awards distributed in cash and stock - OLD
Share-based Compensation Arrangement by Share Based Payment Award, Equity Instruments other than Options Vested in Period Distributed in Cash Percentage
Percentage of award distributed in cash, greater than (as a percent)
This element represents the percentage of the award distributed in cash (in hundredths).
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options Potential Vesting, High End of Range
Number of shares which may be distributed upon vesting, high end of range (in shares)
This element represents the high end of the range of the number of shares which may be distributed upon vesting.
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options Potential Vesting, Low End of Range
Number of shares which may be distributed upon vesting, low end of range (in shares)
This element represents the low end of the range of the number of shares which may be distributed upon vesting.
Allocated Share-based Compensation Expense
Share-based compensation expense (income)
Share Based Compensation Arrangement by Share Based Payment Award, Capitalized Cost
Capitalized compensation cost included in oil and gas-producing properties
Represents the portion of total compensation cost for a share-based compensation arrangement that has been capitalized during the period.
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]
Non-Vested Shares
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value
Weighted Average Fair Value, Beginning of Period (in dollars per share)
Weighted Average Fair Value, End of Period (in dollar 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 Fair Value of shares, Granted (in dollars per share)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period
Non-vested shares, Vested (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period
Non-vested shares, Forfeited (in shares)
Restricted Stock, Weighted Average Remaining Contractual Term (months)
Restricted Stock Weighted Average Remaining Contractual Term Years [Abstract]
Share Based Compensation Arrangement by Share Based Payment Award, Other than Options Outstanding Weighted Average Remaining Contractual Term
Weighted Average Remaining Contractual Term, End of Period (months)
This element represents the weighted average period between the balance-sheet date and expiration for all awards outstanding under the restricted stock plan, which may be expressed in a decimal value for a number of years.
Restricted Stock, Aggregate Fair Value
Restricted Stock Aggregate Fair Value [Abstract]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments other than Options, Non-vested, Total Fair Value
Aggregate Fair Value, Beginning of Period
This element represents the aggregate fair value of the restricted stock at the balance sheet date.
Aggregate Fair Value, End of Period
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments other than Options, Granted in Period, Total Fair Value
Aggregate Fair Value of shares, Granted
This element represents the aggregate fair value of the restricted stock granted during the reporting period.
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments other than Options, Forfeited in Period, Total Fair Value
Aggregate Fair Value of shares, Forfeited
This element represents the aggregate fair value of the restricted stock forfeited during the reporting period.
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Assumptions used in the Black-Scholes single option pricing model
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate
Risk-free interest rate (as a percent)
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate
Dividend yield (as a percent)
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate
Volatility factor (as a percent)
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Lower Range Limit
Risk-free interest rate, low end of the range (as a percent)
The low end of the range of the risk-free interest rate assumption that is used in valuing an option on its own shares.
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Upper Range Limit
Risk-free interest rate, high end of the range (as a percent)
The high end of the range of the risk-free interest rate assumption that is used in valuing an option on its own shares.
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate, Lower Range Limit
Dividend yield, low end of the range (as a percent)
This element represents the estimated low end of the range of the dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate, Upper Range Limit
Dividend yield, high end of the range (as a percent)
This element represents the estimated high end of the range of the dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Lower Range Limit
Volatility factor, low end of the range (as a percent)
This element represents the low end of the range of the percentage amount by which a share price is expected to fluctuate during a period.
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Upper Range Limit
Volatility factor, high end of the range (as a percent)
This element represents the high end of the range of the percentage amount by which a share price is expected to fluctuate during a period.
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term, Lower Range Limit
Expected term, low end of the range (in years)
This element represents the low-end range of period of time at which a share-based award is expected to be outstanding. A share-based award's expected term shall be determined based on, among other factors, the instrument's contractual term and the effects of employees' expected exercise and post-vesting employment termination behavior. An entity is required to aggregate individual awards into relatively homogeneous groups.
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term, Upper Range Limit
Expected term, high end of the range (in years)
This element represents the upper-end range of period of time at which a share-based award is expected to be outstanding. A share-based award's expected term shall be determined based on, among other factors, the instrument's contractual term and the effects of employees' expected exercise and post-vesting employment termination behavior. An entity is required to aggregate individual awards into relatively homogeneous groups.
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Non-qualified Stock Options, Shares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value
Non-Qualified Stock Options, weighted average grant date fair value (in dollars per share)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Total Intrinsic Value
Non-Qualified Stock Options, total intrinsic value of options exercised
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number
Non-qualified Stock Options Outstanding, Beginning of Period (in shares)
Non-qualified Stock Options Outstanding, End of Period (in shares)
Non-qualified Stock Options, Outstanding (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period
Non-qualified Stock Options, Exercised (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period
Non-qualified Stock Options, Forfeited (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number
Non-qualified Stock Options Exercisable, End of Period (in shares)
Non-qualified Stock Options, Weighted Average Exercise Price
Weighted Average Exercise Price [Abstract]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price
Weighted Average Exercise Price, Beginning of Period (in dollars per share)
Weighted Average Exercise Price, End of Period (in dollars per share)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price
Weighted Average Exercise Price of shares, Granted (in dollars per share)
Exercise price of shares granted (in dollars per share)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price
Weighted Average Exercise Price of shares, Exercisable (in dollars per share)
Non-qualified Stock Options, Weighted Average Remaining Contractual Term
Non Qualified Stock Options Weighted Average Remaining Contractual Term Years [Abstract]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term
Weighted Average Remaining Contractual Term, End of Period (in years)
Term of stock options (in years)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term
Weighted Average Remaining Contractual Term, Exercisable (in years)
Non-qualified Stock Options, Aggregate Intrinsic Value
Aggregate Intrinsic Value Non Qualified Stock Options [Abstract]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value
Aggregate Intrinsic Value Outstanding, End of Period
Schedule of Components of Income Tax Expense Benefit [Table Text Block]
Income tax (benefit) expense components
Disclosure of the components of income tax expense attributable to continuing operations for each year presented including, but not limited to: current tax expense (benefit), deferred tax expense (benefit), investment tax credits, government grants, the benefits of operating loss carryforwards, tax expense that results from allocating certain tax benefits either directly to contributed capital or to reduce goodwill or other noncurrent intangible assets of an acquired entity, adjustments of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity, and adjustments of the beginning-of-the-year balances of a valuation allowance because of a change in circumstances that causes a change in judgment about the realizability of the related deferred tax asset in future years.
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]
Reconciliation of income tax expense to amount computed at the federal statutory rate
Disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations.
Summary of Income Tax Contingencies [Text Block]
Reconciliation of the beginning and ending amount of unrecognized tax benefits (excluding interest and penalties)
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]
Summary of net deferred income tax liabilities (assets)
Disclosure of the components of net deferred tax asset or liability recognized in an entity's statement of financial position, including the following: the total of all deferred tax liabilities, the total of all deferred tax assets, the total valuation allowance recognized for deferred tax assets.
Current:
Current Income Tax Expense (Benefit), Continuing Operations [Abstract]
Current Federal Tax Expense (Benefit)
Federal
Current State and Local Tax Expense (Benefit)
State
Current Income Tax Expense (Benefit)
Subtotal
Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract]
Deferred:
Deferred Federal Income Tax Expense (Benefit)
Federal
Deferred State and Local Income Tax Expense (Benefit)
State
Operating Loss Carryback Expiration before Change in Law
Net operating loss carryback provision term before change in law (in years)
The number of years permitted for a tax operating loss carryback prior to the change in law.
Operating Loss Carryback Expiration after Change in Law
Net operating loss carryback provision term after change in law (in years)
The number of years permitted for a tax operating loss carryback after the tax law change.
Income Tax Refund Estimate
Estimated income tax refund
The amount of cash estimated to be received as refunds for the overpayment of taxes.
Income Tax Reconciliation, Deductions, Qualified Production Activities
Income tax benefit (detriment) for certain qualifying production activities
Deferred Tax Liabilities, Regulatory Assets
Regulatory basis differences
Income Tax Reconciliation Permanent Basis Differences
Permanent basis differences
The sum of the differences between total income tax expense (benefit) as reported in the Income Statement for the period and the expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income from continuing operations attributable to permanent basis differences.
Income Tax Reconciliation Regulatory Basis Differences, Gross
Reduction in tax expense due to regulatory basis differences, gross
The gross amount of the differences between total income tax expense (benefit) as reported in the Income Statement for the period and the expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income from continuing operations attributable to establishing a regulatory asset.
Income Tax Reconciliation Regulatory Basis Differences, Other
Increase in tax expense due to other regulatory basis differences
The difference between total income tax expense (benefit) as reported in the Income Statement for the period and the expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income from continuing operations attributable to other regulatory differences not specified elsewhere in the taxonomy.
Unrecognized Tax Benefits Related to Balance Sheet Reclassification
Unrecognized tax benefits, balance sheet reclassification
This element represents the unrecognized tax benefits related to a balance sheet reclassification.
Unrecognized Tax Benefits, Decreases Resulting from Prior Period Tax Positions
Reductions for tax positions of prior years
Unrecognized Tax Benefits, Increases Resulting from Prior Period Tax Positions
Additions for tax positions of prior years
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued
Interest and penalty included in balance sheet
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Reconciliation of reserve for uncertain tax positions, Excluding Amounts Pertaining to Examined Tax Returns
Unrecognized Tax Benefits
Total liability for unrecognized tax benefits, inclusive of interest and penalties
Unrecognized Tax Benefits, Increases Resulting from Current Period Tax Positions
Additions based on tax positions related to current year
Unrecognized Tax Benefits, Decreases Resulting from Settlements with Taxing Authorities
Settlements
Unrecognized Tax Benefits, Reductions Resulting from Lapse of Applicable Statute of Limitations
Lapse of statute of limitations
Unrecognized Tax Benefits Deductible Timing Uncertainty
Tax deductible, but uncertainty about the timing of deductibility
This element represents the amount included in unrecognized tax benefits pertaining to tax positions for which the ultimate deductibility is highly certain but for which there is uncertainty about the timing of such deductibility.
Unrecognized Tax Benefits, Interest on Income Taxes Expense
Interest expense (reversal)
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Estimated Range of Change
Unrecognized tax benefit, reasonably possible decrease within the next 12 months
Deferred Tax Assets (Liabilities), Net [Abstract]
Deferred income taxes:
Deferred Tax Assets, Net
Total deferred income tax assets
Deferred Tax Liabilities
Total deferred income tax liabilities
Deferred Tax Assets (Liabilities), Net
Total net deferred income tax liabilities
Total (including amounts classified as current (assets) liabilities of $(33,586) and $4,727, respectively)
Components of Deferred Tax Assets [Abstract]
Total deferred income tax liabilities (assets)
Deferred Tax Assets, Regulatory Assets and Liabilities
Regulatory temporary differences
Deferred Tax Assets, Tax Credit Carryforwards, Alternative Minimum Tax
Alternative minimum tax credit carryforward
Alternative minimum tax credit carryforward
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Postretirement Benefits
Post-retirement benefits
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Employee Compensation
Deferred compensation plans
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Allowance for Doubtful Accounts
Uncollectible accounts
Deferred Tax Assets, Derivative Instruments
Financial instruments
Income Tax Reconciliation, Other Adjustments
Other
Deferred Tax Assets Other Comprehensive Loss from Pension Plans
Deferred tax asset related to pension plans
The tax effect as of the balance sheet date of the amount of the estimated future tax income (deductions) arising from unrealized gains (losses) on pension plans in other comprehensive income.
Tax Credit Carry forward Expiration Period
Net operating loss carry forward period (in years)
This element represents the carryforward period for federal net operating losses, expressed in years.
Deferred Tax Assets, Operating Loss Carryforwards
Net operating loss carryforwards
Operating Loss Carryforwards, Valuation Allowance
Valuation allowance pertaining to operating loss carry forward
Employee Service Sharebased Compensation by Exercise of Stock Options and Restricted Stock Awards
Income tax benefit by the exercise of nonqualified employee stock options and vesting of restricted share awards
Disclosure of the aggregate tax benefit realized from the exercise of stock options and the vesting of restricted stock.
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]
Aggregate Fair Value
Increase (Decrease) in Standardized Measure of Discounted Future Net Cash Flow Relating to Proved Oil and Gas Reserves [Roll Forward]
Schedule of changes in the standardized measure of discounted future net cash flows
Prepaid Taxes
Prepaid income taxes
Income Tax Reconciliation, Income Tax Expense (Benefit), at Federal Statutory Income Tax Rate
Tax at statutory rate
Income Tax Reconciliation, State and Local Income Taxes
State income taxes
Income Tax Reconciliation, Tax Credits
Federal tax credits and incentives
Unrecognized Tax Benefits Resulting from Reclassification Related to Gross Up of Certain Tax Positions
Unrecognized tax benefits, balance sheet reclassification related to the gross up of certain tax positions that were previously recorded net of tax benefit or as part of deferred taxes or offset against deferred tax assets
Represents the increase in total liability for unrecognized tax benefits attributable to balance sheet reclassification which is related to the gross up of certain tax positions that were previously recorded as net of tax benefit, tax positions which relate to temporary differences were previously a part of deferred taxes and tax positions that were previously offset against deferred tax assets.
Unrecognized Tax Benefits Related to Tax Positions Previously Categorized as Current Liabilities
Unrecognized tax benefits, balance sheet reclassification related to the gross up of certain tax positions that were previously categorized as current liabilities
Represents the increase in the total liability for unrecognized tax benefits attributable to balance sheet reclassification which is related to tax positions previously categorized as current liabilities.
Unrecognized Tax Benefits Excluding Interest and Penalties
The amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns as of the balance sheet date, excluding interest and penalties.
Reserve for uncertain tax positions (excluding interest and penalties) at the beginning of the period
Reserve for uncertain tax positions (excluding interest and penalties) at the end of the period
Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Text Block]
Reconciliation of operating income to net income
Deferred Tax Assets, Other Comprehensive Loss
Accumulated other comprehensive income (loss)
Capitalized Costs Relating to Oil and Gas Producing Activities Disclosure [Text Block]
Capitalized cost incurred relating to natural gas and oil production activities
Cost Incurred in Oil and Gas Property Acquisition, Exploration, and Development Activities Disclosure [Text Block]
Cost incurred relating to property acquisition, exploration and development
Results of Operations for Oil and Gas Producing Activities Disclosure [Text Block]
Results of Operations for Producing Activities
Schedule of Proved Developed and Undeveloped Oil and Gas Reserve Quantities [Text Block]
Reserve Information
Standardized Measure of Discounted Future Cash Flows Relating to Proved Reserves Disclosure [Text Block]
Estimated future net cash flows from natural gas and oil reserves
Equity Method Accounting Ownership Percentage Maximum
This element represents the maximum ownership percentage at which the entity applies the equity method of accounting.
Equity method ownership percentage (as a percent)
Property Net Revenue and Operating Expenses [Table]
The table of property, net revenue and operating expenses.
Property Net Revenue and Operating Expense
Line items represent financial concepts included in a table.
Property Net Revenue and Operating Expense [Line Items]
Oil and Gas Property Successful Effort Method Depletion Rate
Depletion rate of oil and gas producing properties under successful efforts method (in dollars per Mcfe)
This element represents the weighted average rate at which gas producing properties were depleted.
Capitalized Costs, Unproved Properties
Capitalized costs of unproved properties
Capitalized Costs, Uncompleted Wells, Equipment and Facilities
Capitalized exploratory well costs pending the determination of proved reserves
Capitalized Exploratory Well Cost, Charged to Expense
Write off of capitalized exploratory well costs
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment:
Schedule of Property, Plant and Equipment [Table]
Gathering and transmission systems
This element represents the estimated range of service life of gathering and transmission systems used by the entity for productive use over a period greater than one year.
Building
Office equipment
Vehicles
Computer and telecommunications equipment and systems
Property, Plant and Equipment, Useful Life, Minimum
Minimum estimated service life (in years)
Property, Plant and Equipment, Useful Life, Average
Estimated service life (in years)
Property, Plant and Equipment, Useful Life, Maximum
Maximum estimated service life (in years)
Regulated property, plant & equipment, gross
Regulated Property, Plant and Equipment, Gross
The carrying amount at the balance sheet date for long-lived physical assets used in the regulated portion of the business.
Regulated Property, Plant and Equipment Accumulated Depreciation and Amortization
Regulated accumulated depreciation and amortization
The cumulative amount of depreciation and amortization related to regulated property, plant and equipment at the balance sheet date.
Regulated property, plant & equipment, net
Regulated Property, Plant and Equipment, Net
The carrying amount at the balance sheet date for long-lived physical assets used in the regulated portion of the business, net of accumulated depreciation.
Public Utilities, Property, Plant and Equipment, Disclosure of Composite Depreciation Rate for Plants in Service
Composite rate of depreciation for distribution property, plant and equipment (as a percent)
Regulated Operating Revenue
Total regulated revenue
Utilities Operating Expense, Gas and Petroleum Purchased
Total purchased gas costs
Total regulated net revenue
Regulated Operating Revenue, Net
The total amount of regulated net operating revenues recognized during the period, consisting of operating revenues less purchased gas costs.
Fair value of derivative instruments offsetting existing cash flow hedges
Other Derivatives Not Designated as Hedging Instruments Liability at Fair Value, Net
Fair value as of the balance sheet date of derivative instruments used to offset de-designated hedges and classified as a liability.
Public Utilities, Allowance for Funds Used During Construction, Capitalized Interest
Capitalized interest cost as part of allowance for funds used during construction
Public Utilities, Allowance for Funds Used During Construction, Capitalized Cost of Equity
AFUDC equity amounts capitalized
Interest Costs, Capitalized During Period
Capitalized interest costs for construction of long-term assets in unregulated Company businesses
Capitalized interest costs
Deferred Compensation Liability, Current
Incentive compensation 1
Investments, minimum ownership percentage used in applying equity method of accounting (as a percent)
Equity Method Investment Ownership Percentage Minimum
This element represents the general minimum percentage of ownership of common stock or equity participation in investments accounted for under the equity method of accounting. The equity method of accounting is applied to ownership under this percentage if there is the ability to exert significant influence over the operating and financial decisions.
Equity Method Investment Ownership Percentage Maximum
Investments, maximum ownership percentage used in applying equity method of accounting (as a percent)
This element represents the maximum percentage of ownership of common stock or equity participation in investments accounted for under the equity method of accounting.
Unrecognized Tax Benefit Threshold Percentage
Tax benefit recognized in financial statements, percentage threshold (as a percent)
A tax position is measured at the largest amount of benefit that exceeds this percentage which is likely of being realized upon ultimate settlement.
Asset Retirement Obligation [Abstract]
Reconciliation of asset retirement obligations
Asset Retirement Obligation
Asset retirement obligation as of beginning of period
Asset retirement obligation as of end of period
Asset Retirement Obligation, Accretion Expense
Accretion expense
Asset Retirement Obligation, Liabilities Incurred
Liabilities incurred
Divestitures
Asset Retirement Obligation Divestitures
Amount of asset retirement obligation related to assets divested of during the period.
Property, Plant and Equipment, Type [Domain]
Property, Plant and Equipment by Type [Axis]
Valuation Allowances and Reserves, Balance
Balance at Beginning of Period
Balance at End of Period
Valuation Allowances and Reserves, Charged to Cost and Expense
Additions Charged to Costs and Expenses (Income)
Valuation Allowances and Reserves, Charged to Other Accounts
Additions Charged to Other Accounts
Valuation Allowances and Reserves, Deductions
Deductions
Allowance for doubtful accounts
Inventory valuation allowance
Movement in Valuation Allowances and Reserves [Roll Forward]
Movement in Valuation Allowances and Reserves
Valuation and Qualifying Accounts Disclosure [Line Items]
Valuation and Qualifying Accounts Disclosure
Valuation Allowances and Reserves [Domain]
Valuation Allowances and Reserves Type [Axis]
Valuation and Qualifying Accounts Disclosure [Table]
Defined Benefit Plan, Expenses Paid
Expenses paid
This element represents the pension plan non-investment related administrative expenses that are paid directly from the trust.
Defined Benefit Plan, Benefit Obligation
Benefit obligation at beginning of year
Benefit obligation at end of year
Defined Benefit Plan, Benefits Paid
Benefits paid
Defined Benefit Plan, Curtailments
Curtailments
Defined Benefit Plan, Settlements, Benefit Obligation
Settlements
Defined Benefit Plan, Special Termination Benefits
Special termination benefits
Defined Benefit Plan, Fair Value of Plan Assets
Fair value of plan assets at beginning of year
Fair value of plan assets at end of year
Fair value of plan assets
Defined Benefit Plan, Actual Return on Plan Assets
Actual gain (loss) on plan assets
Defined Benefit Plan, Contributions by Employer
Contributions
Cash contributions to pension plan
Defined Benefit Plan, Settlements, Plan Assets
Settlements
Defined Benefit Plan, Funded Status of Plan
Funded status at end of year
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Change in plan assets:
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Change in benefit obligation:
Amounts recognized in accumulated other comprehensive income (loss), net of tax, consist of:
Defined Benefit Plan, Accumulated Other Comprehensive Income, Net of Tax [Abstract]
Defined Benefit Plan, Amounts Recognized in Balance Sheet [Abstract]
Amounts recognized in the statement of financial position consist of:
Pension and Other Postretirement Defined Benefit Plans, Current Liabilities
Current liabilities
Net loss
Defined Benefit Plan, Accumulated Other Comprehensive Income Net Gains Losses Net of Tax
The after tax net amount of gains and losses that are not yet recognized as a component of net periodic benefit cost, and that are recognized as increases or decreases in other comprehensive income as they arise. Gains and losses are due to changes in the value of either the benefit obligation or the plan assets resulting from experience different from that assumed or from a change in an actuarial assumption, or the consequence of a decision to temporarily deviate from the substantive plan.
Net prior service cost (credit)
Defined Benefit Plan, Accumulated Other Comprehensive Income Net Prior Service Cost Credit Net of Tax
Amount related to the after tax cost of benefit changes attributable to plan participants' prior service pursuant to a plan amendment or a plan initiation, which has not yet been recognized as components of net periodic benefit cost.
Defined Benefit Plan, Recognized Net Gain Loss due to Settlements and Special Termination Benefits
Settlement loss and special termination benefits
Settlements represent the amount of net (gain) loss recognized in net periodic benefit cost as a result of an irrevocable action that relieves the employer (or the plan) of primary responsibility for a benefit obligation and eliminates significant risks related to the obligation and the assets used to effect the settlement. Examples of transactions that constitute a settlement include (a) making lump-sum cash payments to plan participants in exchange for their rights to receive specified benefits and (b) purchasing nonparticipating annuity contracts to cover vested benefits. Special termination benefits represent the amount of increase related to special termination benefits offered to and accepted by employees in connection with their termination of employment that are only offered for a short period of time. A situation involving termination benefits may also involve a curtailment.
Defined Benefit Plan, Amortization of Gains (Losses)
Recognized net actuarial loss
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Curtailments
Curtailment loss
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Components of net periodic benefit cost:
Pension and Other Postretirement Defined Benefit Plans, Liabilities
Net amount recognized
Regulatory Assets
Regulatory Assets Net of Amortization Disclosure [Text Block]
This element represents the summary of regulatory assets net of amortization.
Regulated Revenues Net and Operating Expenses Disclosure [Text Block]
Regulated net revenues and operating expenses
Disclosure of the components of regulated revenues and operating costs.
Property, Plant and Equipment [Text Block]
Property, Plant and Equipment
Asset Retirement Obligation Disclosure [Text Block]
Reconciliation of the beginning and ending carrying amounts of asset retirement obligations
Cash and Cash Equivalents, Policy [Text Block]
Cash Equivalents:
Inventory, Policy [Text Block]
Inventories:
Property, Plant and Equipment, Policy [Text Block]
Property, Plant and Equipment:
Sales and Retirement Policy [Text Block]
Sales and Retirements Policies:
This element describes the entity's policy for recognition of gain or loss on the sale of oil and gas reserves.
Public Utilities, Policy [Text Block]
Regulatory Accounting:
Derivatives, Policy [Text Block]
Derivative Instruments:
Allowance for Funds Used During Construction Policy [Text Block]
Allowance for Funds Used During Construction:
This element describes the entity's policy for accounting for allowance for funds used during construction (AFUDC).
Capitalized Interest Policy [Text Block]
Capitalized Interest:
This element describes the entity's policy for accounting for capitalization of interest costs for the construction of certain long-term assets.
Impairment or Disposal of Long-Lived Assets, Policy [Text Block]
Impairment of Long-Lived Assets:
Revenue Recognition, Policy [Text Block]
Revenue Recognition:
Income Tax, Policy [Text Block]
Income Taxes:
Earnings Per Share, Policy [Text Block]
Earnings Per Share (EPS):
Asset Retirement Obligations and Environmental Cost, Policy [Text Block]
Asset Retirement Obligations:
Self Insurance Policy [Text Block]
Self-Insurance:
Describes an entity's losses which are self-insured as well as the policy used in determining the reserve recorded on the balance sheet.
Cubic Feet Per Thousand Barrel
This element represents the conversion value in million cubic feet (MMcf) of natural gas per thousand barrels (MBbl) of oil.
Equivalent number of million cubic feet of natural gas in each thousand barrels of oil
Defined Benefit Plan Amortization of Post-retirement Benefits Other than Pensions Previously Deferred
This element represents the amortization of post retirement benefits other than pensions previously deferred, which are subject to recovery in approved rates.
Equitrans - Amortization of expenses for post-retirement benefits other than pensions previously deferred
Defined Benefit Plan, Ongoing Expenses Postretirement Benefits Other Than Pensions
This element represents the defined benefit plan on-going expenses with respect to post retirement benefits other than pensions, which are subject to recovery in approved rates.
Equitrans - Expenses for on-going post-retirement benefits other than pensions
Other changes in plan assets and benefit obligations recognized in other comprehensive income (loss), net of tax:
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income, Net of Tax [Abstract]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate
Federal statutory rate (as a percent)
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]
Weighted average assumptions to determine the benefit obligations
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate
Discount rate, benefit obligations (as a percent)
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Weighted average assumptions to determine the net periodic benefit cost
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate
Discount rate, net periodic benefit (as a percent)
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets
Expected return on plan assets (as a percent)
Defined Benefit Plan, Effect of One-Percentage Point Change in Assumed Health Care Cost Trend Rates [Abstract]
Assumed health care cost trend rates on the amounts reported for the health care plans
Defined Benefit Plan, Actual Percentage of Assets Domestic Broadly Diversified Equity Securities
Domestic broadly diversified equity securities (as a percent)
This element represents the percentage of the fair value of equity securities of domestic companies to the fair value of total plan assets held as on the measurement date.
Defined Benefit Plan, Target Allocation Percentage of Assets, Domestic Broadly Diversified Equity Securities, Range Minimum
Domestic broadly diversified equity securities, minimum range (as a percent)
This element represents the targeted minimum percentage of investments in equity securities of domestic companies to total plan assets, which is presented on a weighted-average basis for the next fiscal year.
Defined Benefit Plan, Target Allocation Percentage of Assets, Domestic Broadly Diversified Equity Securities, Range Maximum
Domestic broadly diversified equity securities, maximum range (as a percent)
This element represents the targeted maximum percentage of investments in equity securities of domestic companies to total plan assets, which is presented on a weighted-average basis for the next fiscal year.
Defined Benefit Plan, Actual Percentage of Assets Fixed Income Securities and Inflation Hedge Securities
Fixed income securities and inflation hedge securities (as a percent)
This element represents the percentage of the fair value of debt and inflation hedge securities to the fair value of total plan assets held as on the measurement date.
Defined Benefit Plan, Target Allocation Percentage of Assets, Fixed Income Securities and Inflation Hedge Securities, Range Minimum
Fixed income securities and inflation hedge securities, minimum range (as a percent)
This element represents the targeted minimum percentage of investments in debt and inflation hedge securities to total plan assets, which is presented on a weighted-average basis for the next fiscal year.
Defined Benefit Plan, Target Allocation Percentage of Assets, Fixed Income Securities and Inflation Hedge Securities, Range Maximum
Fixed income securities and inflation hedge securities, maximum range (as a percent)
This element represents the targeted maximum percentage of investments in debt and inflation hedge securities to total plan assets, which is presented on a weighted-average basis for the next fiscal year.
Defined Benefit Plan, Actual Percentage of Assets International Broadly Diversified Equity Securities
International broadly diversified equity securities (as a percent)
This element represents the percentage of the fair value of equity securities in foreign companies to the fair value of total plan assets held as on the measurement date.
Defined Benefit Plan, Target Allocation Percentage of Assets, International Broadly Diversified Equity Securities, Range Minimum
International broadly diversified equity securities, minimum range (as a percent)
This element represents the targeted minimum percentage of investments in equity securities of foreign companies to total plan assets, which is presented on a weighted-average basis for the next fiscal year.
Defined Benefit Plan, Target Allocation Percentage of Assets, International Broadly Diversified Equity Securities, Range Maximum
International broadly diversified equity securities, maximum range (as a percent)
This element represents the targeted maximum percentage of investments in equity securities of foreign companies to total plan assets, which is presented on a weighted-average basis for the next fiscal year.
Defined Benefit Plan, Fair Value of Plan Assets by Measurement [Axis]
Fair Value Plan Asset Measurement [Domain]
Defined Benefit Plan by Plan Asset Categories [Axis]
Plan Asset Categories [Domain]
Mutual Funds
This element represents an investment that pools funds from many investors to invest in a combination of underlying investments.
Common Collective Trusts
This element represents investment in common/collective trusts.
Defined Benefit Plan, Amortization of Net Gains (Losses)
Net loss of defined benefit pension plans, amortized from accumulated other comprehensive income (loss), net of tax, into net periodic benefit cost
Defined Benefit Plan, Amortization of Net Prior Service Cost (Credit)
Net prior service credit of other post-retirement benefit plans, amortized from accumulated other comprehensive loss, net of tax, into net periodic benefit cost
Defined Benefit Plan, Effect of One Percentage Point Increase on Service and Interest Cost Components
Effect of a one-percentage-point increase to total of service and interest cost components
Defined Benefit Plan, Effect of One Percentage Point Decrease on Service and Interest Cost Components
Effect of a one-percentage-point decrease to total of service and interest cost components
Defined Benefit Plan, Effect of One Percentage Point Increase on Accumulated Postretirement Benefit Obligation
Effect of a one-percentage-point increase to post-retirement benefit obligation
Defined Benefit Plan, Effect of One Percentage Point Decrease on Accumulated Postretirement Benefit Obligation
Effect of a one-percentage-point decrease to post-retirement benefit obligation
Defined Benefit Plan, Assets, Target Allocations [Abstract]
Pension asset allocation and target allocation for 2011 by asset category
Defined Benefit Plan, Expected Future Benefit Payments in Year One
Defined benefit plan, expected future benefit payments in year 2011
Defined Benefit Plan, Expected Future Benefit Payments in Year Two
Defined benefit plan, expected future benefit payments in year 2012
Defined Benefit Plan, Expected Future Benefit Payments in Year Three
Defined benefit plan, expected future benefit payments in year 2013
Defined Benefit Plan, Expected Future Benefit Payments in Year Four
Defined benefit plan, expected future benefit payments in year 2014
Defined Benefit Plan, Expected Future Benefit Payments in Year Five
Defined benefit plan, expected future benefit payments in year 2015
Defined Benefit Plan, Expected Future Benefit Payments in Five Fiscal Years Thereafter
Defined benefit plan, expected future benefit payments in the five years after 2015
Defined Contribution Plan, Cost Recognized
Expense recognized related to 401(k) employee savings plans
Defined Benefit Plan, Amounts that Will be Amortized from Accumulated Other Comprehensive Income (Loss) in Next Fiscal Year
Amortization from accumulated other comprehensive loss, net of tax, into net periodic benefit cost over the next fiscal year
This element represents the sum of net periodic benefit cost recognized in income and changes in plan assets and benefit obligations recognized in other comprehensive loss, net of tax, related to defined benefit plans.
Total recognized in net periodic benefit cost and other comprehensive income (loss), net of tax
Defined Benefit Plan Net Periodic Benefit Cost and Other Comprehensive Income Net of Tax
Amortization of deferred investment tax credit
Amortization of Deferred Investment Tax Credit
This element represents the amount of investment tax credit amortized into income tax expense (benefit) during the reporting period.
Expected Percentage of Funding Obligations Met by Cash Contributions
Expected percentage of funding obligations met by cash contributions (as a percent)
This element represents the percentage of funding obligations to be met by cash contributions made by the employer.
Benchmark Percentage of Funding Obligations Targeted to be Met through Cash Contributions
Benchmark percentage of funding obligations targeted to be met through cash contributions (as a percent)
This element represents the benchmark percentage of funding obligations which is targeted to be met through cash contributions of pension plans.
Defined Benefit Plan, Decrease in Projected Benefit Obligation Settlement with Former Subsidiary
This element represents the decrease in the projected benefit obligations due to the settlement of its pension obligations under a plan covering the employees of its subsidiary.
Decrease in projected benefit obligation, settlement of pension obligations of former Kentucky West Virginia employees
Defined Benefit Plan Health Care Cost Annual Rate of Change in Per Capita Health Care Cost Pre 65
This element represents the annual rate of change in pre-65 per capita cost of health care benefits currently provided by the postretirement benefit plan.
Annual rate of increase in Pre-65 medical charges (as a percent)
Defined Benefit Plan Health Care Cost Annual Rate of Change in Per Capita Health Care Cost Post 65
This element represents the annual rate of change in post-65 per capita cost of health care benefits currently provided by the postretirement benefit plan.
Annual rate of increase in Post-65 medical charges (as a percent)
Defined Benefit Plan, Ultimate Health Care Cost Trend Rate
Assumption for ultimate increase in annual medical rates in 2018 (as a percent)
Provision for Doubtful Accounts:
Receivables Trade and Other Accounts Receivable Allowance for Doubtful Accounts Policy [Text Block]
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.
Regulated net property, plant and equipment
This element can be used to encapsulate the entire disclosure for regulated property plant and equipment (including data and tables).
Schedule of Regulated Property, Plant and Equipment [Text Block]
Schedule of Segment Reporting Information Revenue from External Customers and Operating Income [Text Block]
Revenue from external customers and operating income
This element can be used to capture the complete disclosure about the revenues and operating income for each reportable segment, including a reconciliation to the consolidated totals.
Schedule of Segment Reporting Information Total Assets [Text Block]
Segment assets
This element can be used to capture the complete disclosure about the total assets for each reportable segment, including a reconciliation to the consolidated total.
Schedule of Segment Reporting Information Depreciation, Depletion, Amortization and Expenditures for Segment Assets [Text Block]
Depreciation, depletion and amortization and expenditures for segment assets
This element can be used to capture the complete disclosure about the depreciation, depletion & amortization expense and expenditures for segment assets.
Computation of basic and diluted earnings per common share
Earnings Per Share [Text Block]
Principal Sources of Change in Standardized Measure of Discounted Future Net Cash Flow Relating to Proved Oil and Gas Reserves [Text Block]
Changes in the standardized measure of discounted net cash flows from natural gas and oil reserves
This element can be used to disclose the principal sources of changes in the standardized measure of discounted net cash flows from natural gas and oil reserves.
Adjustments made to inventory
Inventory Valuation Reserves
Capitalized internal costs of oil and gas producing properties under the successful efforts method
Oil and Gas Property Successful Effort Method Internal Costs
The amount of internal costs capitalized as part of oil and gas producing properties under the successful efforts method.
Proved Wells [Table]
The table of proved wells.
Proved Wells [Axis]
The listing of wells that have proved reserves.
Proved Wells by Name [Domain]
Identification of the wells with proved reserves.
Utica Well
The Utica exploratory well.
Proved Wells
Proved Wells [Line Items]
Other
The reporting segment of the entity that includes information not elsewhere disclosed in the taxonomy.
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Asset retirement obligations
Regulated Property, Plant and Equipment
Line items represent financial concepts included in a table.
Regulated Property, Plant and Equipment [Line Items]
Amount of unrealized gain (loss) arising from the change in fair value of price risk derivatives designated as cash flow hedging instruments recorded in accumulated other comprehensive income in the period, after taxes, to the extent that the cash flow hedge is determined to be effective.
Unrealized Gain (Loss) on Price Risk Cash Flow Derivatives, after Tax
Amount of gain recognized in OCI (effective portion), net of tax
Investments in equity securities, limit of ownership used in accounting for investments as available-for-sale securities (as a percent)
Available-for-Sale Securities Percentage Limit
This element represents the limit of ownership which the entity uses in determining that investments should be accounted for as available-for-sale securities.
Payments to Acquire Property Plant and Equipment and Payments to Acquire Interest in Joint Venture
Expenditures for segment assets
This element represents expenditures for segment assets, including the purchase of additional working interests.
Deferred Tax Assets (Liabilities), Net Noncurrent and Accumulated Deferred Investment Tax Credit
This element represents the noncurrent portion of the net amount of deferred tax assets (after reduction for valuation allowance) and liabilities as of the balance sheet date. This element also includes the noncurrent portion of the reserve for accumulated deferred investment tax credits as of the balance sheet date.
Deferred income taxes and investment tax credits
Drilling Cost Tax Deduction Percentage
Deduction of intangible drilling costs (as a percent)
The percentage of drilling costs deducted as intangible drilling costs for federal income tax purposes.
Incentive or deferred compensation
The sum of the differences between total income tax expense (benefit) as reported in the Income Statement for the period and the expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income from continuing operations attributable to compensation paid to covered employees in excess of Internal Revenue Code limitations.
Income Tax Reconciliation Incentive or Deferred Compensation
Regulatory basis differences
Income Tax Reconciliation Regulatory Basis Differences
The difference between total income tax expense (benefit) as reported in the Income Statement for the period and the expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income from continuing operations attributable to regulatory basis differences.
Other
Deferred Tax Assets, Other
Income tax deduction limit, annual compensation for covered employees
Income Tax Deduction Limit Annual Compensation
The limit on annual compensation paid to any covered employee for federal income tax deductibility.
Unrecognized tax benefits that would impact effective tax rate
Unrecognized Tax Benefits that Would Impact Effective Tax Rate
Tax depreciation in excess of book depreciation
Deferred Tax Liabilities, Property, Plant and Equipment
Drilling and development costs expensed for income tax reporting
Deferred Tax Liabilities, Deferred Expense Capitalized Drilling and Development Costs
The amount as of the balance sheet date of the estimated future tax effects attributable to the difference between tax basis of drilling and development costs and the basis of drilling and development costs computed in accordance with generally accepted accounting principles. The difference in basis will increase future taxable income when such basis difference is realized.
Current deferred income tax liabilities
Deferred Tax Liabilities, Current
Current deferred income tax assets
Deferred Tax Assets, Net, Current
Deferred purchased gas cost
Deferred Tax Liabilities Deferred Gas Costs
The amount as of the balance sheet date of the estimated future tax effects attributable to capitalized gas costs of a regulated entity that are expected to be recoverable through rate adjustments.
Investment tax credit
Accumulated Deferred Investment Tax Credit
Deferred Tax Assets (Liabilities) Other Comprehensive Income from Available-for-sale Securities
The amount as of the balance sheet date of the estimated future tax effects arising from unrealized (gains) losses on available-for-sale securities included in other comprehensive income which will increase (decrease) future taxable income when such gain (loss) is realized.
Deferred tax asset (liability) related to net unrealized (gain) loss on available-for-sale securities
Deferred Tax Assets Other Comprehensive Loss from Other Postretirement Benefit Plans
The tax effect as of the balance sheet date of the amount of the estimated future tax income (deductions) arising from unrealized gains (losses) on other post-retirement benefit plans in other comprehensive income.
Deferred tax asset related to other post-retirement benefits
Deferred tax asset related to the net operating loss carryforward
Deferred Tax Assets, Operating Loss Carryforwards, Domestic
Deferred tax asset for state net operating loss carryforwards
Deferred Tax Assets, Operating Loss Carryforwards, State and Local
Deferred asset/(liability) related to net unrealized income/loss from hedging transactions
Deferred Tax Assets Liabilities Other Comprehensive Loss from Designated or Qualifying Cash Flow Hedges
The tax effect as of the balance sheet date of the amount of the estimated future tax deductions (benefits) arising from unrealized losses (gains) on derivative instruments designated and qualifying as the effective portion of cash flow hedges in other comprehensive income.
Incentive compensation
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Other
Increase (Decrease) in Allowance for Equity Funds Used During Construction
Other income
Earnings per share of common stock:
This element is used as an abstract heading for Earnings per share of common stock.
Earnings Per Share of Common Stock
Short-Term Loans
Schedule of Line of Credit Facilities [Text Block]
Schedule of Amounts Recognized in Balance Sheet [Table Text Block]
Defined benefit pension and other post-retirement benefit plans, amounts recognized in balance sheet
Disclosure of the amounts that are recognized in the balance sheet (or statement of financial position) for pension plans and/or other employee benefit plans, showing separately the assets and current and noncurrent liabilities (if applicable) recognized.
Schedule of Net Benefit Costs [Table Text Block]
Defined benefit pension and other post-retirement benefit plans, components of net periodic benefit cost
Disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain or loss, prior service cost or credit, transition asset or obligation, and gain or loss recognized due to settlements or curtailments.
Schedule of Amounts Recognized in Other Comprehensive Income (Loss) [Table Text Block]
Defined benefit pension and other post-retirement benefit plans, amount recognized in other comprehensive income
Disclosure of the net gain or loss and net prior service cost or credit recognized in other comprehensive income (loss) for the period for pension plans and/or other employee benefit plans, and reclassification adjustments of other comprehensive income (loss) for the period, as those amounts, including amortization of the net transition asset or obligation, are recognized as components of net periodic benefit cost.
Schedule of Assumptions Used Benefit Obligation [Table Text Block]
Defined benefit pension and other post-retirement benefit plans, assumption used to determine the benefit obligations
Disclosure of the assumptions used to determine for pension plans and/or other employee benefit plans the benefit obligation including assumed discount rates, rate increase in compensation increase, and expected long-term rates of return on plan assets.
Schedule of Assumptions Used Net Periodic Benefit Cost [Table Text Block]
Defined benefit pension and other post-retirement benefit plans, assumption used to determine the net periodic benefit cost
Disclosure of the assumptions used to determine for pension plans and/or other employee benefit plans the net periodic benefit cost including assumed discount rates, rate increase in compensation increase, and expected long-term rates of return on plan assets.
Schedule of Effect of One Percentage Point Change in Assumed Health Care Cost Trend Rates [Table Text Block]
Defined benefit post-retirement benefit plans, impact of one-percentage-point change in assumed health care cost trend rates
Disclosure of the effect of a one-percentage-point increase and the effect of a one-percentage-point decrease in the assumed health care cost trend rates on the aggregate of the service and interest cost components of net periodic postretirement health care benefit costs and the accumulated postretirement benefit obligation for health care benefits.
Schedule of Allocation of Plan Assets [Table Text Block]
Defined benefit pension plans, asset allocation
Disclosure of the major categories of plan assets of pension plans and/or other employee benefit plans. This information may include, but is not limited to: the target allocation of plan assets, the fair value of each major category of plan assets, and the level within the fair value hierarchy in which the fair value measurements fall.
Duration of revolving credit agreement (in years)
This element represents the term of the line of credit facility.
Line of Credit Facility Duration
Line of Credit Facility Extension Duration
Length of extension of line of credit (in years)
This element represents the duration of the period of extension which may be requested for the line of credit facility, expressed in years.
Line of Credit Facility, Maximum Amount Outstanding During Period
Maximum amount of outstanding short-term loans at any time during the year
Line of Credit Facility, Average Outstanding Amount
Average daily balance of short-term loans outstanding during the year
Line of Credit Facility, Interest Rate During Period
Weighted average annual interest rates of average daily balance of short-term loans (as a percent)
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months
Aggregate maturities in 2011
Long-term Debt, Maturities, Repayments of Principal in Year Two
Aggregate maturities in 2012
Long-term Debt, Maturities, Repayments of Principal in Year Three
Aggregate maturities in 2013
Long-term Debt, Maturities, Repayments of Principal in Year Four
Aggregate maturities in 2014
Long-term Debt, Maturities, Repayments of Principal in Year Five
Aggregate maturities in 2015
Defined Benefit Plan, Actual Percentage of Assets Other
This element represents the percentage of the fair value in other than equity securities of domestic companies, investments in debt and inflation hedge securities, and equity securities of foreign companies to total plan assets presented on a weighted-average basis for the next fiscal year.
Other securities (as a percent)
Common Stock, Capital Shares Reserved for Future Issuance
Total (in shares)
Defined Benefit Plan, Estimated Future Employer Contributions in Next Fiscal Year
Expected cash payments related to its pensions
Investments:
Investment Policy [Text Block]
Reconciliation of Unrecognized Tax Benefits Table [Text Block]
Reconciliation of the beginning and ending amount of unrecognized tax benefits (excluding interest and penalties)
Disclosure detailing the change during the period of the gross amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns.
Incentive Compensation Liability Current
Incentive compensation
Aggregate carrying value as of the balance sheet date of the liabilities for all incentive compensation arrangements payable within one year.
Purchased Gas Policy [Text Block]
Purchased Gas Costs:
This element describes the entity's policy for accounting for purchased gas costs.
Employee Service Share-based Compensation, Tax Benefit from Compensation Expense
Actual tax benefits realized for tax deductions from share-based payment arrangements
Deferred Compensation Arrangement Units Issued
Units distributed, number (in units)
The number of units (consisting of cash and stock components) distributed upon vesting of a share-based compensation plan.
Comprehensive Income Note [Text Block]
Accumulated Other Comprehensive Income (Loss)
Schedule of Accumulated Other Comprehensive Income [Table Text Block]
Components of accumulated other comprehensive (loss) income, net of tax
Disclosure of the components of accumulated other comprehensive income.
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options Vested Number
Share units outstanding, vested (in shares)
The number of outstanding awards on nonstock option plans (for example, phantom stock plan, stock appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is obligated to issue equity instruments or transfer assets to a party who has satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares.
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period
Period after which the shares granted will be fully vested (in years)
Share-based Compensation Arrangements by Share-based Payment Award, Equity Instruments Other than Options Forfeited in Period Weighted Average Grant Date Fair Value
Weighted Average Fair Value of shares, Forfeited (in dollars per share)
The weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect during the reporting period as a result of the occurrence of a terminating event.
Share based Compensation Arrangement by Share Based Payment Award Option Grants in Period Weighted Average Exercise Price
Weighted Average Exercise Price of shares, Granted (in dollars per share)
The weighted average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on stock option awards under the plan during the reporting period.
Share Based Compensation Arrangement by Share Based Payment Award, Option Exercises in Period Weighted Average Exercise Price
Weighted Average Exercise Price of shares, Exercised (in dollars per share)
The weighted average price at which option holders acquired shares when converting stock options into shares under the plan during the reporting period.
Share Based Compensation Arrangement by Share Based Payment Award Option Forfeitures in Period Weighted Average Exercise Price
Weighted Average Exercise Price of shares, Forfeited (in dollars per share)
The weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated during the reporting period.
Aggregate Intrinsic Value Exercisable, End of Period
Share-based Compensation Arrangement by Share-based Payment Options Exercisable Intrinsic Value
The total dollar difference between fair values of the underlying shares reserved for issuance and exercise prices of the vested portions of options outstanding and currently exercisable under the option plan as of the balance-sheet date.
Share-based Compensation Arrangement by Share-based Payment Award, Award Expiration Period
The period of expiration for awards granted during the period, which is expressed in years.
Actual life of the newly issued options (in years)
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term
Expected term (in years)
Valuation and Qualifying Accounts Disclosure [Table Text Block]
This element represents the disclosure related to valuation and qualifying accounts.
SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS AND RESERVES
Concentration Risk by Benchmark [Axis]
Concentration Risk Benchmark [Domain]
Sales revenue goods, net
Accounts receivable
Credit concentration risk
Concentration Risk, Benchmark Percentage
Concentration risk, benchmark percentage (as a percent)
The benchmark percentage that serves as the threshold over which the entity discloses concentrations of risk.
Concentration Risk, Customer Number
Concentration of revenue risk, number of marketers
The number of customers which accounted for a concentration of revenue risk that exceeds the benchmark.
Derivative Counterparty Declared, Bankruptcy Number
Number of counterparties providing credit support for derivative contracts that have declared bankruptcy
The number of counterparties that provide credit support for derivative contracts with the entity that have filed for bankruptcy.
Long-term Purchase Commitment [Table]
Long-term Purchase Commitment by Category of Item Purchased [Axis]
Long-term Purchase Commitment, Category of Item Purchased [Domain]
Commitment of the entity to pay demand charges under existing long-term contracts and binding precedent agreements with various pipelines.
Pipeline demand charges
Drilling equipment and services supply agreements
Commitment of the entity to pay for drilling equipment and services supplied to the entity.
Long-term Purchase Commitment, Amount
Significant supply of drilling equipment and services commitment
Amount due as of December 31, 2010
Accrual for Environmental Loss Contingencies
Remedial action included in other credits
Leases, Operating [Abstract]
Operating Leases
Operating Leases Rent Expense, Net
2 Operating lease rentals for drilling contractors, office locations, warehouse buildings and some equipment
Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income.
Operating Leases, Future Minimum Payments Due
Total as of December 31, 2010
Operating Leases, Future Minimum Payments Due, Current
Due 2011
Operating Leases, Future Minimum Payments, Due in Two Years
Due 2012
Operating Leases, Future Minimum Payments, Due in Three Years
Due 2013
Operating Leases, Future Minimum Payments, Due in Four Years
Due 2014
Operating Leases, Future Minimum Payments, Due in Five Years
Due 2015
Operating Leases, Future Minimum Payments, Due Thereafter
Due after 2015
Sublease rental
Future Sublease Rental [Abstract]
Operating Lease Sublease Rental Space, Number
The amount of space subleased by the entity, expressed in number of floors.
Subleased space of previous corporate headquarters building (in number of floors)
Operating Leases, Future Minimum Payments Due, Future Minimum Sublease Rentals
Total sublease future lease payments
Operating Leases, Future Minimum Payments Due, Future Minimum Sublease Rentals Due Current
Contractually required future rental payments receivable on noncancelable subleasing arrangements due in the year following the balance sheet date.
Sublease payments due 2011
Operating Leases, Future Minimum Payments Due, Future Minimum Sublease Rentals Due in Two Years
Contractually required future rental payments receivable on noncancelable subleasing arrangements due within the second year following the balance sheet date.
Sublease payments due 2012
Operating Leases, Future Minimum Payments Due, Future Minimum Sublease Rentals Due in Three Years
Contractually required future rental payments receivable on noncancelable subleasing arrangements due within the third year following the balance sheet date.
Sublease payments due 2013
Operating Leases, Future Minimum Payments Due, Future Minimum Sublease Rentals Due in Four Years
Contractually required future rental payments receivable on noncancelable subleasing arrangements due within the fourth year following the balance sheet date.
Sublease payments due 2014
Operating Leases, Future Minimum Payments Due, Future Minimum Sublease Rentals Due in Five Years
Contractually required future rental payments receivable on noncancelable subleasing arrangements due within the fifth year following the balance sheet date.
Sublease payments due 2015
Operating Leases, Future Minimum Payments due, Future Minimum Sublease Rentals due Thereafter
Contractually required future rental payments receivable on noncancelable subleasing arrangements due after the fifth year following the balance sheet date.
Sublease payments due after 2015
Operating Leases, Future Minimum Payments Due [Abstract]
Operating leases, future minimum payments due:
Long Term Purchase Commitment Amount, Due Next Year
Amount due in 2011
The amount the entity agreed to spend under the long-term purchase commitment in the next year.
Long Term Purchase Commitment Amount, Due in Two Years
Amount due in 2012
The amount the entity agreed to spend under the long-term purchase commitment within the second year following the balance sheet date.
Long Term Purchase Commitment Amount, Due in Three Years
Amount due in 2013
The amount the entity agreed to spend under the long-term purchase commitment within the third year following the balance sheet date.
Long Term Purchase Commitment Amount, Due in Four Years
Amount due in 2014
The amount the entity agreed to spend under the long-term purchase commitment within the fourth year following the balance sheet date.
Long Term Purchase Commitment Amount, Due in Five Years
Amount due in 2015
The amount the entity agreed to spend under the long-term purchase commitment within the fifth year following the balance sheet date.
Long Term Purchase Commitment Amount, Due after Five Years
Amount due after 2015
The amount the entity agreed to spend under the long-term purchase commitment after five years following the balance sheet date.
Share Based Compensation Arrangement by Share Based Payment Award Ultimate Share Price
Assumed ultimate share price (in dollars per share)
The ultimate share price assumption at the end of the performance period (per share).
Share Based Compensation Arrangement by Share Based Payment Award Assumed Payout Multiple
Assumed ultimate payout multiple percent (as a percent)
The payout multiple assumption at the end of the performance period.
Schedule of Fair Value Assets and Liabilities Measured on Recurring Basis [Table Text Block]
Assets and liabilities measured at fair value on a recurring basis
This element represents the disclosure related to assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3).
Guarantees [Text Block]
Guarantees
This element may be used as a single block of text to encapsulate the entire disclosure about each guarantee obligation, or each group of similar guarantee obligations, including (a) the nature of the guarantee, including its term, how it arose, and the events or circumstances that would require the guarantor to perform under the guarantee; (b) the maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee; (c) the current carrying amount of the liability, if any, for the guarantor's obligations under the guarantee; and (d) the nature of any recourse provisions under the guarantee, and any assets held either as collateral or by third parties, and any relevant related party disclosure. Excludes disclosures about product warranties.
Schedule of Quarterly Financial Information [Table Text Block]
Interim Financial Information (Unaudited)
Disclosure of the quarterly financial data in the annual financial statements as a single block of text. The disclosure includes a tabular presentation of financial information for each fiscal quarter for the current and previous year, including revenues, gross profit, income (loss) before extraordinary items and cumulative effect of a change in accounting principle and earnings per share data.
Impairment charge due to relocation of the Company's corporate headquarters and other operations
Other Nonrecurring Expense
Discounted Future Net Cash Flows Relating to Proved Oil and Gas Reserves 10 Percent Annual Discount for Estimated Timing of Cash Flows before Income Taxes
This is the amount that is derived from using a discount rate of ten percent a year to reflect the timing of the future net cash flows relating to proved oil and gas reserves, before income taxes.
10% annual discount for estimated timing of cash flows
End of year
Beginning of year
Standardized Measure of Discounted Future Net Cash Flow Relating to Proved Oil and Gas Reserves
NORESCO Guarantees, Total
The agreement as part of the company's 2005 sale of NORESCO domestic operations that guarantees certain customer energy savings, customer contracts, existing leases and other items.
Variable Interest Entity Unconsolidated VIE Assets
Total assets of the unconsolidated VIE, Appalachian NPI, LLC (ANPI)
This element represents the total assets of the variable interest entity that is not consolidated within the company's statement of financial position.
Variable Interest Entity Unconsolidated VIE Liabilities
Total liabilities of the unconsolidated VIE, ANPI
This element represents the total liabilities of the variable interest entity that is not consolidated within the company's statement of financial position.
NORESCO Guarantees, Other
The guarantee provided by the entity to maintain NORESCO's obligations under certain customer contracts, existing leases and other items.
NORESCO Guarantees, Energy Savings
The savings guarantees provided by the entity that the customers of NORESCO would experience a specified amount of energy savings.
Interim Financial Information (Unaudited)
Quarterly Financia lInformation [TextBlock]
Operating lease rentals for drilling contractors, office locations, warehouse buildings and some equipment
Lease and Rental Expense
Other Items to Reconcile Net Income (Loss) to Cash Provided By (Used in) Operating Activities
Other items, net
The aggregate amount of other items to reconcile net income (loss) to cash provided (used) in operating activities. The aggregate amount also includes changes in noncurrent operating assets and liabilities.
Common Stock Shares Outstanding
Balance (in shares)
Balance (in shares)
Accumulated Other Comprehensive Income (Loss), Net of Tax
Capitalized Costs Wells and Related Equipment and Facilities
Total regulated operating expenses
Regulated Operating Expenses
The total amount of regulated operating expenses for the period.
Available For Sale Securities Gross Unrealized Gain
The gross unrealized gains for securities which are categorized neither as held-to-maturity nor trading securities.
Gross Unrealized Gains
Other securities, minimum range (as a percent)
Defined Benefit Plan Target Allocation Percentage of Assets Other Assets Range Minimum
This element represents the targeted minimum percentage of investments in other assets to total plan assets, which is presented on a weighted-average basis for the next fiscal year.
Other securities, maximum range (as a percent)
Defined Benefit Plan Target Allocation Percentage of Assets Other Assets Range Maximum
This element represents the targeted maximum percentage of investments in other assets to total plan assets, which is presented on a weighted-average basis for the next fiscal year.
Proved Developed Reserves
Beginning of year, proved developed reserves (in MMcfe)
End of year, proved developed reserves (in MMcfe)
Net quantities of an enterprise's interests in proved developed reserves of either crude oil (including condensate and natural gas liquids) or natural gas as of the beginning and the end of the year. "Net" quantities of reserves include those relating to the enterprise's operating and nonoperating interests in properties. Quantities of reserves relating to royalty interests owned shall be included in "net" quantities if the necessary information is available to the enterprise. "Net" quantities shall not include reserves relating to interests of others in properties owned by the enterprise. Measured in millions of cubic feet equivalent (MMcfe).
Proved Developed and Undeveloped Reserves, Production, Equity Method Investees
The Company's share of reserves in ANGT, an equity method investment.
Company's share of produced volumes (in MMcfe)
Company's share of proved developed reserves (in MMcfe)
Reserves Share of Equity Method Investees Net Proved Oil and Gas Reserves
Share Based Compensation Arrangement by Share Based Payment Award Equity Instruments Other than Options Distributed In Cash And Stock
Value of vested stock-based awards distributed in cash and stock
The total fair value of share-based awards for which the grantee received cash or stock during the reporting period, by satisfying service and performance requirements.
Accumulated Other Comprehensive Income (Loss)
Change in assumed cost of well plugging
Asset Retirement Obligation Revision of Estimate
Exploratory Well, Costs Incurred
Costs incurred on exploratory wells
The amount of capitalized exploratory well costs incurred during the period prior to the determination of proved reserves.
Regulatory, Total Assets
Total regulatory assets
The total amount for regulatory assets as itemized in a table as of the end of the period.
Proved Developed and Undeveloped Reserves, Purchases of Natural Gas in Place
Additional purchase of natural gas proved reserves (in Bcf)
Additional purchase of natural gas proved reserves (in Bcf).
Interest expense
Interest Expense
Prepaid expenses and other
Increase (Decrease) in Other Operating Assets
Other items, net
Increase (Decrease) in Other Operating Assets and Liabilities, Net
Short-term loans
Short-term Borrowings
Revolving credit facility outstanding amount at the end of period
Deferred income taxes and investment tax credits
Deferred Tax Liabilities, Noncurrent
Short-Term Loans
Short-term Debt [Text Block]
Guarantees
Schedule of Guarantor Obligations [Text Block]
Interim Financial Information (Unaudited)
Preferred shares authorized
Preferred Stock, Shares Authorized
preferred shares issued
Preferred Stock, Shares Issued
preferred shares outstanding
Preferred Stock, Shares Outstanding
IRS 2009 Net Operating Loss Claim
The 2009 claim submitted to the IRS relating to a net operating loss.
Marcellus Shale
The details pertaining to the acquisition of Marcellus Shale.
Business Acquisition, Percentage of Acquired Entity Equity Interests Issued and Issuable
The percentage of instruments or interests issued or issuable in consideration for the business combination.
Payment for acquisition, in stock (as a percent)
Business Acquisition, Percentage of Acquired Entity Cash Paid
Cash payment for acquisition (as a percent)
Percentage of cash paid to acquire the entity.
Business Acquisition, Total Area of Acquisition
Total area of acquisition (in acres)
The total area acquired by the entity following the closing of the acquisition.
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Net Asset Liability, Transfers, Net
This element represents [net] transfers in to and out of assets and liabilities measured at fair value on a recurring basis using unobservable inputs (Level 3) which have taken place during the period.
Transfers in and/or out of Level 3
Available-for-sale Securities, Gross Unrealized Losses New
This item represents the gross unrealized losses for securities which are categorized neither as held-to-maturity nor trading securities. Such gross unrealized losses are the excess of the carrying value of the Available-for-sale Securities over their fair value as of the reporting date. Such gross unrealized losses are included in other comprehensive income in the statement of shareholders' equity, unless the Available-for-sale Security is designated as a hedge or is determined to have had an other than temporary decline in fair value below its amortized cost basis. Recognized in earnings is all or a portion of the unrealized holding loss, during the period of the hedge, of an Available-for-sale Security that is designated as being hedged in a fair value hedge, other than temporary declines in fair value below cost basis of equity securities, and debt securities which an other than temporary decline in fair value is due to credit losses or which the entity intends to sell or it is more likely than not that the entity will be required to sell the security before recovery of its amortized cost basis.
Gross Unrealized Losses
Rate of compensation increase, benefit obligations (as a percent)
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Rate of Compensation Increase
Rate of compensation increase, net periodic benefit (as a percent)
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase
Interest Revenue Expense All, Net
Amount of interest revenue (income derived from investments in debt securities, cash and cash equivalents and on margin accounts related to derivative instrument collateral agreements) net of interest expense (cost of borrowed funds accounted for as interest).
Interest expense
Defined Benefit Plan, Actual Plan Asset Allocations
Fair value of investments held at measurement date (as a percent)
Assets held for sale
Assets Held-for-sale, Current
Gross realized gains reclassified from accumulated other comprehensive income
Other Comprehensive Income (Loss), Reclassification Adjustment for Sale of Securities Included in Net Income, Net of Tax
Share-based payment arrangements paid in stock, tax benefit
Employee Service Share-based Compensation, Tax Benefit Realized from Exercise of Stock Options
2011 Volume and Efficiency Program
This element represents the entity's 2011 Volume and Efficiency Program.
2011 Value Driver Performance Program
This element represents the entity's 2011 Value Driver Performance Program.
2011 Stock Options
This element represents the entity's 2011 Stock Option Plan.
Percentage of Total Debt to Total Capital, Maximum
Percentage of total debt to total capital, maximum (as a percent)
The percentage of total aggregate indebtedness to total capital.
Concentration Risk Percentage of Labor Subject to Collective Bargaining Arrangements
Description of company's workforce concentration of labor subject to collective bargaining agreements, including the general nature of the risk.
Entity's workforce subject to collective bargaining agreements (as a percent)
Concentration Risk Percentage of Labor Subject to Collective Bargaining Arrangements Expiration
Entity's workforce subject to collective bargaining agreements expiration (as a percent)
Description of company's workforce concentration of labor subject to collective bargaining agreements expiring in the following year.
CAP tracker
This element represents the assets related to CAP tracker.
Langley
The details pertaining to Langley.
Volume of Cryogenic Processing, Plant Per Day
Volume of cryogenic processing plant (in MMcfd)
This element represents the volumetric capacity of the cryogenic processing plant.
Volume of Refrigeration Processing Plant
Volume of processing plant (in MMcfd)
This element represents the volumetric capacity of the processing plant.
Volume of Compression
Volume of compression (in horsepower)
This element represents power of compression.
Expenses Incurred to Operate Plant Included in Depreciation, Depletion and Amortization
Expenses incurred to operate the plant included in depreciation depletion and amortization
This element represents the expenses incurred to operate the plant included in depreciation depletion and amortization.
Other Derivatives Not Designated as Hedging Instruments Asset at Fair Value, Net
Fair value as of the balance sheet date of derivative instruments used to offset de-designated hedges and classified as an asset.
Fair value of derivative instruments, additional cash flow hedges, scheduled to be terminated
Increase in Bonus Depreciation for Qualified Investments
Increase for bonus depreciation
This element represents the increase for bonus depreciation.
Income Tax Expense on Share-based Payment Awards Tax
Payments awarded under the 2009 shareholder value plan, tax
This element represents the tax portion of payments awarded under the 2009 shareholder value plan.
Most Highly Compensated Officers, Not PEO or PFO
Number of most highly compensated officers other than the principal execuitve officer and the principal financial officer awarded payments under the 2009 Shareholder Value Plan.
Number of highly compensated officers other than the principal executive officer or the principal financial officer
2011 Stock Options
2011 Stock Options [Abstract]
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price
The stated exercise price for purposes of disclosing shares potentially issuable under outstanding stock option awards on stock option plans.
Exercise price of stock options (in dollars per share)
Share Based Compensation Arrangement By Share Based Payment Award Options Vested At End Of One Year In Percentage
The percentage of the stock options which will vest at the end of year one.
Stock options vested at end of year one, percentage (in percent)
Share Based Compensation Arrangement By Share Based Payment Award Options Vested At End Of Two Year In Percentage
The percentage of the stock options which will vest at the end of year two.
Stock options vested at end of year two, percentage (in percent)
Unrecognized Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost
The unrecognized tax effect as of the balance sheet date of the amount of the estimated future tax deductions arising from equity-based compensation costs, which can only be deducted for tax purposes when actual costs are incurred, and which can only be realized if sufficient tax-basis income is generated in future periods to enable the deduction to be taken.
Excess tax benefit
Proceeds And Excess Tax Benefits From Stock Option Exercises
The cash received as a result of option exercises and the associated reductions in the entity's income taxes.
Proceeds and excess tax benefits from exercises under employee compensation plans
Unbilled Receivables, Current
The amount due for services rendered or products shipped, but not yet billed, recognized in conformity with revenue recognition criteria. This element is distinct from unbilled contracts receivables because this is based on noncontract transactions.
Unbilled revenues
Schedule Of Benefit Obligations In Excess Of Fair Value Of Plan Assets [Table Text Block]
Tabular disclosure of the aggregate benefit obligation and aggregate fair value of plan assets for pension plans and/or other employee benefit plans with benefit obligations in excess of plan assets as of the measurement date.
Defined benefit pension and other post-retirement benefit plans benefit obligation, change in fair value of assets, and funded status
Asset Retirement Obligation, Liabilities Settled
Liabilities settled
Expenditures For Segment Assets For Undeveloped Property Acquisitions Using Company Stock
This element represents expenditures for undeveloped property acquisitions utilizing company common stock.
Undeveloped property acquisition amount
Expenses Incurred To Operate Plant Excluding DD&A
This element represents the expenses incurred to operate the plant excluding DD&A.
Expenses incurred to operate the plant excluding DD&A
Processing Fees And Expenses Incurred By Entity For Processing By Third Party
This element represents processing fees and expenses the company would have incurred for processing Langley natural gas volumes by third party.
Assumed processing fees and expenses incurred by entity had the Langley volumes been done by a third party
Asset Acquisition [Line Items]
Asset Acquisition
Asset Acquisition Area Of Property
The approximate area of acquisition by the entity.
Approximate area of acquisition (in acres)
Cost Of Acquired Assets Total
The total cost of acquired assets including the cash paid and equity securities issued.
Purchase price of acquisition
Cost Of Acquired Assets Stock Portion
The total cost of acquired assets paid through equity securities issued.
Payment for acquisition, in stock
Cost Of Acquired Assets Cash Portion
The cost of acquired assets paid in cash.
Cash payment for acquisition, in cash
Regulatory Assets Post Retirement Benefits
This element represents the amount of post retirement benefits other than pensions included as a regulatory asset.
Other post-retirement benefit, included in total regulatory assets related to other post-retirement benefits other than pension
Regulatory Assets Future Recovery Number Of Years
This element represents the future recovery period of other post-retirement benefits (in years).
Future recovery of the unfunded status, other post-retirement benefits (in years)
Asset Acquisition Length Of Gathering System
Length of the gathering system acquired, with associated rights of way.
Length of gathering system (in miles)
Number of wells acquired.
Asset Acquisition Number Of Vertical Wells
Number of wells acquired
Increase (Decrease) in Natural Gas Equivalent Reserves due to Change in Prices and Other
Upward or (downward) revision in previous natural gas equivalent reserve estimates (in Bcfe)
This element represents the upward or downward revision to prior period natural gas equivalent reserve estimates due to increases or decreases in prices and other revisions.
Change in Estimate of Prior natural gas equivalent Reserves due to Change in Rules
Change in prior natural gas equivalent reserve estimate due to change in rules (in Bcfe)
This element represents the change in prior period natural gas equivalent reserve estimates due to new rules being implemented.