Segment Reporting [Abstract]
Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Table]
Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Table]
Divisions [Axis]
Divisions [Axis]
Divisions [Axis]
Divisions [Domain]
Divisions [Domain]
[Domain] for Divisions [Axis]
Total E&P [Member]
Exploration and Production Equipment [Member]
Midstream [Member]
CNXM [Member]
CNXM [Member]
Consolidation Items [Axis]
Consolidation Items [Axis]
Consolidation Items [Domain]
Consolidation Items [Domain]
Operating Segments [Member]
Operating Segments [Member]
Corporate, Non-Segment [Member]
Corporate, Non-Segment [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total Segment Income (Loss) Before Income Taxes for reportable business segments
Income (Loss) from Continuing Operations before Income Taxes, Domestic
Other (Expense) Income
Other Nonoperating Income (Expense)
Gain on Certain Asset Sales
Gain (Loss) on Disposition of Assets
Gain on Previously Held Equity Interest
Equity Method Investment, Realized Gain (Loss) on Disposal
Loss on Debt Extinguishment
Gain (Loss) on Extinguishment of Debt
Impairment of Other Intangible Assets
Impairment of Intangible Assets, Finite-lived
Income (Loss) From Continuing Operations Before Income Tax
Equity [Abstract]
Amortization of Prior Service Costs
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)
Recognized Net Actuarial Loss
Defined Benefit Plan, Amortization of Gain (Loss)
Total
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)
Less: Tax Benefit
Tax Benefit on Actuarially Determined Long-Term Liabilities
Tax Benefit on Actuarially Determined Long-Term Liabilities
Net of Tax
Actuarially Determined Long-Term Liability Adjustments, Net of Tax
Actuarially Determined Long-Term Liability Adjustments, Net of Tax
Income Tax Disclosure [Abstract]
Income Taxes
Income Tax Disclosure [Text Block]
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangible Assets
Goodwill and Intangible Assets Disclosure [Text Block]
Commitments and Contingencies Disclosure [Abstract]
Long-term Purchase Commitment
Long-term Purchase Commitment [Table Text Block]
Schedule of Future Minimum Rental Payments for Operating Leases
Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]
Unrecorded Unconditional Purchase Obligations Disclosure
Unrecorded Unconditional Purchase Obligations Disclosure [Table Text Block]
Long-term Debt, Other Disclosures [Abstract]
Long-term Debt
Long-term Debt [Text Block]
Revenue from Contract with Customer [Abstract]
Disaggregation of Revenue [Table]
Disaggregation of Revenue [Table]
Product and Service [Axis]
Product and Service [Axis]
Product and Service [Domain]
Product and Service [Domain]
Natural Gas [Member]
Natural Gas [Member]
NGLs [Member]
NGLs [Member]
NGLs [Member]
Condensate [Member]
Condensate [Member]
Condensate [Member]
Oil [Member]
Oil [Member]
Oil and Gas Service [Member]
Oil and Gas Service [Member]
Purchased Gas Revenue [Member]
Oil and Gas, Purchased [Member]
Midstream Revenue [Member]
Natural Gas, Midstream [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers
Revenue from Contract with Customer, Excluding Assessed Tax
Gain on Commodity Derivative Instruments
Gain (Loss) on Hedging Activity
Other Operating Income
Other Operating Income
Total Revenue
Revenues
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligations, expected timing of satisfaction
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period
Remaining performance obligations
Revenue, Remaining Performance Obligation, Amount
Accounting Changes and Error Corrections [Abstract]
Recent Accounting Pronouncements
New Accounting Pronouncements and Changes in Accounting Principles [Text Block]
Business Combinations [Abstract]
Acquisitions And Dispositions
Acquisitions And Dispositions Disclosure [Text Block]
This element may be used to capture disclosure pertaining to acquisitions and dispositions. For acquisitions, description of a business acquisition (or series of individually immaterial business combinations) planned, initiated, or completed during the period, including background, timing, and allocation of acquisition costs. For dispositions, disclosure includes the facts and circumstances leading to the completed or expected disposal, manner and timing of disposal, the gain or loss recognized in the income statement and the income statement caption that includes that gain or loss, and the segment in which the disposal group was reported.
Statement of Financial Position [Abstract]
ASSETS
Assets [Abstract]
Current Assets:
Assets, Current [Abstract]
Cash and Cash Equivalents
Cash and Cash Equivalents, at Carrying Value
Accounts and Notes Receivable:
Accounts, Notes, Loans and Financing Receivable, Net, Current [Abstract]
Trade
Accounts Receivable, Net, Current
Other Receivables
Other Receivables, Net, Current
Supplies Inventories
Inventory, Net
Recoverable Income Taxes
Income Taxes Receivable, Current
Prepaid Expenses
Prepaid Expense, Current
Total Current Assets
Assets, Current
Property, Plant and Equipment:
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment
Property, Plant and Equipment, Gross
Less—Accumulated Depreciation, Depletion and Amortization
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment
Total Property, Plant and Equipment—Net
Property, Plant and Equipment, Net
Other Assets:
Other Assets, Noncurrent [Abstract]
Investment in Affiliates
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures
Goodwill
Goodwill
Other Intangible Assets
Intangible Assets, Net (Excluding Goodwill)
Other
Other Assets, Noncurrent
Total Other Assets
Other Assets
TOTAL ASSETS
Assets
LIABILITIES AND EQUITY
Liabilities and Equity [Abstract]
Current Liabilities:
Liabilities, Current [Abstract]
Accounts Payable
Accounts Payable, Current
Current Portion of Long-Term Debt
Long-term Debt and Capital Lease Obligations, Current
Other Accrued Liabilities
Other Accrued Liabilities, Current
Total Current Liabilities
Liabilities, Current
Long-Term Debt:
Long-term Debt, Excluding Current Maturities [Abstract]
Long-Term Debt
Long-term Debt, Excluding Current Maturities
Capital Lease Obligations
Capital Lease Obligations, Noncurrent
Total Long-Term Debt
Long-term Debt and Capital Lease Obligations
Deferred Credits and Other Liabilities:
Other Liabilities, Noncurrent [Abstract]
Deferred Income Taxes
Deferred Income Tax Liabilities, Net
Asset Retirement Obligations
Asset Retirement Obligations, Noncurrent
Other
Other Liabilities, Noncurrent
Total Deferred Credits and Other Liabilities
Total deferred credits and other liabilities
Total deferred credits and other liabilities.
TOTAL LIABILITIES
Liabilities
Stockholders’ Equity:
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract]
Common Stock, $.01 Par Value; 500,000,000 Shares Authorized, 205,147,139 Issued and Outstanding at September 30, 2018; 223,743,322 Issued and Outstanding at December 31, 2017
Common Stock, Value, Issued
Capital in Excess of Par Value
Additional Paid in Capital
Preferred Stock, 15,000,000 shares authorized, None issued and outstanding
Preferred Stock, Value, Issued
Retained Earnings
Retained Earnings (Accumulated Deficit)
Accumulated Other Comprehensive Loss
Accumulated Other Comprehensive Income (Loss), Net of Tax
Total CNX Resources Stockholders’ Equity
Stockholders' Equity Attributable to Parent
Noncontrolling Interest
Stockholders' Equity Attributable to Noncontrolling Interest
TOTAL STOCKHOLDERS' EQUITY
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest
TOTAL LIABILITIES AND EQUITY
Liabilities and Equity
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table]
Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table]
Award Type [Axis]
Award Type [Axis]
Award Type [Domain]
Equity Award [Domain]
Employee Stock Option [Member]
Employee Stock Option [Member]
Restricted Stock Units [Member]
Restricted Stock [Member]
Performance Share Units [Member]
Performance Share Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options exercised (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period
Total share-based awards, exercised or released (in shares)
Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative [Table]
Derivative [Table]
Oil and Gas Production Type [Axis]
Oil and Gas Production Type [Axis]
Production Type [Domain]
Production Type [Domain]
Propane [Member]
Propane [Member]
Derivative Instrument [Axis]
Derivative Instrument [Axis]
Derivative Contract [Domain]
Derivative Contract [Domain]
Commodity Swaps [Member]
Commodity [Member]
Basis Swap [Member]
Basis Swap [Member]
Derivative [Line Items]
Derivative [Line Items]
Cash Received (Paid) in Settlement of Commodity Derivative Instruments:
Gain (Loss) on Sale of Commodity Contracts
Unrealized Gain (Loss) on Commodity Derivative Instruments:
Unrealized Gain (Loss) on Derivatives and Commodity Contracts
Gain (Loss) on Commodity Derivative Instruments:
Schedule of Variable Interest Entities [Table]
Schedule of Variable Interest Entities [Table]
Income Statement Location [Axis]
Income Statement Location [Axis]
Income Statement Location [Domain]
Income Statement Location [Domain]
Other Operating Income (Expense) [Member]
Other Operating Income (Expense) [Member]
Transportation, Gathering and Compression [Member]
Transportation, Gathering and Compression [Member]
Transportation, Gathering and Compression [Member]
Investment [Axis]
Investment [Axis]
Investment [Domain]
Investment [Domain]
CNX Gathering LLC [Member]
CNX Gathering LLC [Member]
CNX Gathering LLC [Member]
CNXM [Member]
Variable Interest Entity [Line Items]
Variable Interest Entity [Line Items]
Equity Method [Roll Forward]
Equity Method [Roll Forward]
Equity Method [Roll Forward]
Balance at December 31, 2016
Equity Method Investments
Equity in Earnings
Income (Loss) from Equity Method Investments
Distributions
Proceeds from Equity Method Investment, Distribution
Asset Transfer
Equity Method Investment, Asset Transfer
Equity Method Investment, Asset Transfer
Balance at December 31, 2017
Basis of Presentation
Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]
Schedule of Revenue by Major Customers, by Reporting Segments [Table]
Schedule of Revenue by Major Customers, by Reporting Segments [Table]
Revenue, Major Customer [Line Items]
Revenue, Major Customer [Line Items]
Total Segment Revenue from Contracts with External Customers
Retirement Benefits [Abstract]
Components of Net Periodic Costs
Schedule of Defined Benefit Plans Disclosures [Table Text Block]
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block]
Schedule of Earnings Per Share, Basic and Diluted
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
Revenue From Contracts With Customers
Revenue from Contract with Customer [Text Block]
Schedule of Business Acquisitions, by Acquisition [Table]
Schedule of Business Acquisitions, by Acquisition [Table]
Business Acquisition [Axis]
Business Acquisition [Axis]
Business Acquisition, Acquiree [Domain]
Business Acquisition, Acquiree [Domain]
Midstream Acquisition [Member]
Midstream Acquisition [Member]
Midstream Acquisition [Member]
Business Acquisition [Line Items]
Business Acquisition [Line Items]
Cash Consideration
Business Combination, Consideration Transferred
CNX Gathering Cash on Hand at January 3, 2018 Distributed to Noble
Business Combination, Consideration Transferred, Other
Fair Value of Previously Held Equity Interest
Business Combination, Step Acquisition, Equity Interest in Acquiree, Fair Value
Total Estimated Fair Value of Consideration Transferred
Business Combination, Consideration Transferred, Including Equity Interest in Acquiree Held Prior to Combination
Ownership [Axis]
Ownership [Axis]
Ownership [Domain]
Ownership [Domain]
CONE Midstream GP LLC [Member]
CONE Midstream GP LLC [Member]
CONE Midstream GP LLC [Member]
Finite-Lived Intangible Assets by Major Class [Axis]
Finite-Lived Intangible Assets by Major Class [Axis]
Finite-Lived Intangible Assets, Major Class Name [Domain]
Finite-Lived Intangible Assets, Major Class Name [Domain]
Customer Relationships [Member]
Customer Relationships [Member]
Investment, Name [Axis]
Investment, Name [Axis]
Investment, Name [Domain]
Investment, Name [Domain]
Disposal Group Name [Axis]
Disposal Group Name [Axis]
Disposal Group Name [Domain]
Disposal Group Name [Domain]
Ohio Utica Joint Venture Assets [Member]
Ohio Utica Joint Venture Assets [Member]
Ohio Utica Joint Venture Assets [Member]
Asset Exchange Agreement with HG Energy [Member]
Asset Exchange Agreement with HG Energy [Member]
Asset Exchange Agreement with HG Energy [Member]
Shallow Oil, Gas, and CBM Assets in Pennsylvania and West Virginia [Member]
Shallow Oil, Gas, and CBM Assets in Pennsylvania and West Virginia [Member]
Shallow Oil, Gas, and CBM Assets in Pennsylvania and West Virginia [Member]
Surface Land, Colorado [Member]
Surface Land, Colorado [Member]
Surface Land, Colorado [Member]
Marcellus Shale Acres, Allegheny and Westmoreland County [Member]
Marcellus Shale Acres, Allegheny and Westmoreland County [Member]
Marcellus Shale Acres, Allegheny and Westmoreland County [Member]
Marcellus And Utica Shale, Allegheny, Washington And Westmoreland Counties [Member]
Marcellus And Utica Shale, Allegheny, Washington And Westmoreland Counties [Member]
Marcellus And Utica Shale, Allegheny, Washington And Westmoreland Counties [Member]
Marcellus And Utica Acres, Doddridge And Wetzel Counties [Member]
Marcellus And Utica Acres, Doddridge And Wetzel Counties [Member]
Marcellus And Utica Acres, Doddridge And Wetzel Counties [Member]
Utica Point Pleasant Shale Acres, Jefferson, Belmont And Guernsey Counties [Member]
Utica Point Pleasant Shale Acres, Jefferson, Belmont And Guernsey Counties [Member]
Utica Point Pleasant Shale Acres, Jefferson, Belmont And Guernsey Counties [Member]
Knox and Coalfield [Member]
Knox and Coalfield [Member]
Knox and Coalfield [Member]
Midstream [Member]
Midstream [Member]
Midstream [Member]
Net undeveloped acres
Gas and Oil Area, Undeveloped, Net
Net gain (loss) on sale
Cash proceeds from Asset Exchange Agreement
Proceeds from Asset Exchange Agreement
Proceeds from Asset Exchange Agreement
Number of wells added to existing commitment
Business Acquisition, Number Of Additional Wells Added
Business Acquisition, Number Of Additional Wells Added
Impairment of other intangible
Cash consideration received in sale of oil and gas assets
Disposal Group, Including Discontinued Operation, Consideration
Asset retirement obligations assumed
Disposal Group, Including Discontinued Operations, Asset Retirement Obligations Assumed
Disposal Group, Including Discontinued Operations, Asset Retirement Obligations Assumed
Ownership percentage in equity method investment
Equity Method Investment, Ownership Percentage
Ownership percentage by parent
Noncontrolling Interest, Ownership Percentage by Parent
Cash consideration transferred
Fair value of previously held equity interest
Gain on remeasurement of fair value of previously held equity interest
Business Combination, Step Acquisition, Equity Interest in Acquiree, Remeasurement Gain
Net acres of land
Area of Land
Proceeds from sale of assets
Proceeds from Sale of Productive Assets
Producing gas wells
Productive Gas Wells, Number of Wells, Gross
Drilled but uncompleted wells
Business Combination, Wells Drilled, Uncompleted
Business Combination, Wells Drilled, Uncompleted
Schedule of Defined Benefit Plans Disclosures [Table]
Schedule of Defined Benefit Plans Disclosures [Table]
Retirement Plan Type [Axis]
Retirement Plan Type [Axis]
Retirement Plan Type [Domain]
Retirement Plan Type [Domain]
Pension Plan [Member]
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service Cost
Defined Benefit Plan, Service Cost
Interest Cost
Defined Benefit Plan, Interest Cost
Amortization of Prior Service Credits
Recognized Net Actuarial Loss
Curtailment Gain
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement and Curtailment
Decrease in plan liabilities due to plan remeasurement
Defined Benefit Plan, Accumulated Benefit Obligation, (Increase) Decrease for Settlement and Curtailment
Statement of Comprehensive Income [Abstract]
Net Income (Loss)
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest
Other Comprehensive Income:
Other Comprehensive Income (Loss), before Tax [Abstract]
Actuarially Determined Long-Term Liability Adjustments (Net of tax: ($13), ($2,034), ($794), ($6,121))
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax
Comprehensive Income (Loss)
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest
Less: Comprehensive Income Attributable to Noncontrolling Interest
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Noncontrolling Interest
Comprehensive Income (Loss) Attributable to CNX Resources Shareholders
Comprehensive Income (Loss), Net of Tax, Attributable to Parent
Related Party Transactions [Abstract]
Related Party Transactions
Related Party Transactions Disclosure [Text Block]
Less than 1 year
Operating Leases, Future Minimum Payments, Remainder of Fiscal Year
1 - 3 years
Operating Leases, Future Minimum Payments, Due in Two and Three Years
3 - 5 years
Operating Leases, Future Minimum Payments, Due in Four and Five Years
More than 5 years
Operating Leases, Future Minimum Payments, Due Thereafter
Total Operating Lease Obligations
Operating Leases, Future Minimum Payments Due
Fair Value Disclosures [Abstract]
Fair Value of Financial Instruments
Fair Value Disclosures [Text Block]
Industry Segment Results
Schedule of Segment Reporting Information, by Segment [Table Text Block]
Reconciliation of Revenue from Segments to Consolidated
Reconciliation of Revenue from Segments to Consolidated [Table Text Block]
Reconciliation of Revenue and Operating Income from Segments to Consolidated
Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Table Text Block]
Reconciliation of Assets and Liabilities from Segment to Consolidated
Reconciliation of Assets from Segment to Consolidated [Table Text Block]
Derivative Instruments
Derivative Instruments and Hedging Activities Disclosure [Text Block]
Fair Value, Assets Measured on Recurring Basis
Fair Value, Assets Measured on Recurring Basis [Table Text Block]
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis
Fair Value, by Balance Sheet Grouping [Table Text Block]
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]
Schedule of Pro Forma Information
Business Acquisition, Pro Forma Information [Table Text Block]
Stock Repurchase [Abstract]
Stock Repurchase [Abstract]
Subsequent Event [Table]
Subsequent Event [Table]
Subsequent Event Type [Axis]
Subsequent Event Type [Axis]
Subsequent Event Type [Domain]
Subsequent Event Type [Domain]
Subsequent Event [Member]
Subsequent Event [Member]
Subsequent Event [Line Items]
Subsequent Event [Line Items]
Stock repurchase program, authorized amount
Stock Repurchase Program, Authorized Amount
Stock repurchase program, additional authorized amount
Stock Repurchase Program, Additional Authorized Amount
Stock Repurchase Program, Additional Authorized Amount
Shares repurchased during period (in shares)
Stock Repurchased During Period, Shares
Shares repurchased, average price (in usd per share)
Treasury Stock Acquired, Average Cost Per Share
Total value of shares repurchased
Stock Repurchased and Retired During Period, Value
Property, Plant and Equipment
Property, Plant and Equipment [Table Text Block]
Disaggregation of Revenue
Disaggregation of Revenue [Table Text Block]
Schedule of Changes in Accumulated Other Comprehensive Income/(Loss) by Component
Schedule of Changes in Accumulated Other Comprehensive Income/(Loss) by Component [Table Text Block]
[Table Text Block] for Schedule of Changes in Accumulated Other Comprehensive Income/(Loss) by Component [Table]
Schedule of Reclassification of Adjustments to Accumulated Other Comprehensive Income
Schedule of Reclassification of Adjustments to Accumulated Other Comprehensive Income [Table Text Block]
[Table Text Block] for Schedule of Reclassification of Adjustments to Accumulated Other Comprehensive Income [Table]
Earnings Per Share
Earnings Per Share [Text Block]
Segments [Axis]
Segments [Axis]
Segments [Domain]
Segments [Domain]
Midstream Revenue
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual
Earnings from Continuing Operations Before Income Tax
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual
Segment Information
Segment Reporting Disclosure [Text Block]
Numerator:
Earnings Per Share Reconciliation [Abstract]
Income (Loss) from Continuing Operations
Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest
Less: Net Income Attributable to Noncontrolling Interest
Net Income (Loss) Attributable to Noncontrolling Interest
Net Income (Loss) from Continuing Operations Attributable to CNX Resources Shareholders
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent
Income from Discontinued Operations
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent
Net Income
Net Income (Loss) Attributable to Parent
Denominator:
Weighted Average Number of Shares Outstanding, Basic [Abstract]
Weighted-average shares of common stock outstanding (in shares)
Weighted Average Number of Shares Outstanding, Basic
Effect of dilutive shares (in shares)
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements
Weighted-average diluted shares of common stock outstanding (in shares)
Weighted Average Number of Shares Outstanding, Diluted
Earnings (Loss) Per Share
Earnings Per Share [Abstract]
Basic (Continuing Operations) (in usd per share)
Income (Loss) from Continuing Operations, Per Basic Share
Basic (Discontinued Operations) (in usd per share)
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share
Total Basic Earnings (Loss) Per Share (in usd per share)
Earnings Per Share, Basic
Dilutive (Continuing Operations) (in usd per share)
Income (Loss) from Continuing Operations, Per Diluted Share
Dilutive (Discontinued Operations) (in usd per share)
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share
Total Dilutive Earnings (Loss) Per Share (in usd per share)
Earnings Per Share, Diluted
Income Statement [Abstract]
Basic
Earnings Per Share, Basic [Abstract]
Income (Loss) from Continuing Operations (in usd per share)
(Loss) Income from Discontinued Operations (in usd per share)
Dilutive
Earnings Per Share, Diluted [Abstract]
Income (Loss) from Continuing Operations (in usd per share)
(Loss) Income from Discontinued Operations (in usd per share)
Dividends Declared Per Share (in usd per share)
Common Stock, Dividends, Per Share, Cash Paid
Fair Value, by Balance Sheet Grouping [Table]
Fair Value, by Balance Sheet Grouping [Table]
Measurement Basis [Axis]
Measurement Basis [Axis]
Fair Value Measurement [Domain]
Fair Value Measurement [Domain]
Portion at Fair Value Measurement [Member]
Portion at Fair Value Measurement [Member]
Carrying Amount [Member]
Reported Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-Term Debt
Long-term Debt
Long-term Debt, Fair Value
Long-term Debt, Fair Value
Reconciliation of Assets from Segment to Consolidated [Table]
Reconciliation of Assets from Segment to Consolidated [Table]
E&P [Member]
Intersegment Eliminations [Member]
Intersegment Eliminations [Member]
Segment Reconciling Items [Member]
Segment Reconciling Items [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Segment Reporting, Asset Reconciling Item [Line Items]
Segment assets for total reportable business segments
Items excluded from segment assets:
Segment Reporting Information Other Items Not Allocated To Segments [Abstract]
Segment Reporting Information, Other Items Not Allocated to Segments [Abstract]
Cash and Cash Equivalents
Investments and Cash
Recoverable Income Taxes
Discontinued Operations
Disposal Group, Including Discontinued Operation, Assets
Total Consolidated Assets
Schedule of Long-term Debt
Schedule of Long-term Debt Instruments [Table Text Block]
Property, Plant and Equipment
Property, Plant and Equipment Disclosure [Text Block]
Pro Forma Total Revenue and Other Operating Income
Business Acquisition, Pro Forma Revenue
Pro Forma Net Income from Continuing Operations
Business Acquisition, Pro Forma Income (Loss) from Continuing Operations, Net of Tax
Less: Pro Forma Net income Attributable to Noncontrolling Interests
Business Acquisition, Pro Forma Income (Loss), Attributable to Non-Controlling Interests
Business Acquisition, Pro Forma Income (Loss), Attributable to Non-Controlling Interests
Pro Forma Net Income(Loss) from Continuing Operations Attributable to CNX
Business Acquisition, Pro Forma Income (Loss), From Continuing Operations, Attributable to Parent
Business Acquisition, Pro Forma Income (Loss), From Continuing Operations, Attributable to Parent
Pro Forma Income Loss per Share from Continuing Operations (Basic) (usd per share)
Business Acquisition, Pro Forma Earnings Per Share, Basic
Pro Forma Income Loss per Share from Continuing Operations (Diluted) (usd per share)
Business Acquisition, Pro Forma Earnings Per Share, Diluted
Stock Repurchase
Repurchase Agreements, Valuation, Policy [Policy Text Block]
Schedule of Goodwill [Table]
Schedule of Goodwill [Table]
Goodwill [Line Items]
Goodwill [Line Items]
Goodwill [Roll Forward]
Goodwill [Roll Forward]
December 31, 2017
Acquisitions
Goodwill, Acquired During Period
September 30, 2018
Schedule of Long-term Debt Instruments [Table]
Schedule of Long-term Debt Instruments [Table]
Credit Facility [Axis]
Credit Facility [Axis]
Credit Facility [Domain]
Credit Facility [Domain]
CNX Revolving Credit Facility [Member]
CNX Revolving Credit Facility [Member]
CNX Revolving Credit Facility [Member]
CNX Midstream Partners LP Revolving Credit Facility [Member]
CNX Midstream Partners LP Revolving Credit Facility [Member]
CNX Midstream Partners LP Revolving Credit Facility [Member]
Debt Instrument [Axis]
Debt Instrument [Axis]
Debt Instrument, Name [Domain]
Debt Instrument, Name [Domain]
Senior Notes Due April 2022 [Member]
Senior Notes due April 2022 [Member]
Senior Notes due April 2022 [Member]
Revolving Credit Facility - CNXM [Member]
Revolving Credit Facility [Member]
Senior Notes due March 2026 [Member]
6.50% Senior Notes due March 2026 [Member]
6.50% Senior Notes due March 2026 [Member]
Senior Notes due April 2023 [Member]
Senior Notes due April 2023 [Member]
Senior Notes due April 2023 [Member]
Other Note Maturing in 2018 [Member]
Other Long Term Notes Maturing in 2018 [Member]
Other Long Term Notes Maturing in 2018 [Member]
Debt Instrument [Line Items]
Debt Instrument [Line Items]
Debt instrument, face amount
Debt Instrument, Face Amount
Debt instrument, unamortized discount
Debt Instrument, Unamortized Discount, Current
Stated rate, debt instrument
Debt Instrument, Interest Rate, Stated Percentage
Debt instrument, unamortized premium
Debt Instrument, Unamortized Premium, Current
Long-term debt, gross
Less: Unamortized Debt Issuance Costs
Unamortized Debt Issuance Expense
Less: Amounts Due in One Year
Long Term Debt, Current Maturities - Net of unamortized debt issuance costs
Long Term Debt, Current Maturities - Net of unamortized debt issuance costs
Long-Term Debt
Current portion of capital lease obligation
Capital Lease Obligations, Current
Discontinued Operations and Disposal Groups [Abstract]
Disposal Groups, Including Discontinued Operations [Table]
Disposal Groups, Including Discontinued Operations [Table]
Buchanan and Other Assets [Member]
Buchanan and Other Assets [Member]
Buchanan and Other Assets [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of companies after spin off
Number Of Companies After Spin-off
Number Of Companies After Spin-off
Number of shares issued to shareholders after spin-off (in shares)
Discontinued Operations, Number Of Shares Received In Spin-off
Discontinued Operations, Number Of Shares Received In Spin-off
Coal Revenue
Disposal Group, Including Discontinued Operations, Coal Sales
Disposal group, including discontinued operations, coal sales
Other Outside Sales
Disposal Group, Including Discontinued Operations, Other Outside Sales
Disposal Group, Including Discontinued Operations, Other Outside Sales
Freight-Outside Coal
Disposal Group, Including Discontinued Operations, Cargo and Freight Revenue
Miscellaneous Other Income
Disposal Group, Including Discontinued Operation, Other Income
(Loss) Gain on Sale of Assets
Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax
Total Revenue and Other Income
Disposal Group, Including Discontinued Operation, Revenue
Total Costs
Disposal Group, Including Discontinued Operation, Operating Expense
Income from Operations Before Income Taxes
Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax
Income Tax Expense
Discontinued Operation, Tax Effect of Discontinued Operation
Less: Net Income Attributable to Noncontrolling Interest
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Noncontrolling Interest
(Loss) Income from Discontinued Operations, net
Disposal Group, Including Discontinued Operation, Operating Income (Loss)
Fair Value Measurements, Recurring and Nonrecurring [Table]
Fair Value Measurements, Recurring and Nonrecurring [Table]
Fair Value Hierarchy and NAV [Axis]
Fair Value Hierarchy and NAV [Axis]
Fair Value Hierarchy and NAV [Domain]
Fair Value Hierarchy and NAV [Domain]
Fair Value, Inputs, Level 1 [Member]
Fair Value, Inputs, Level 1 [Member]
Fair Value, Inputs, Level 2 [Member]
Fair Value, Inputs, Level 2 [Member]
Fair Value, Inputs, Level 3 [Member]
Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gas Derivatives
Derivative Asset
Put Option
Guarantees, Fair Value Disclosure
Customer Relationships
Finite-Lived Customer Relationships, Gross
Less: Impairment of Other Intangible Assets
Less: Accumulated Amortization for Customer Relationships
Finite-Lived Intangible Assets, Accumulated Amortization
Total Other Intangible Assets, net
Finite-Lived Intangible Assets, Net
Balance Sheet Location [Axis]
Balance Sheet Location [Axis]
Balance Sheet Location [Domain]
Balance Sheet Location [Domain]
Cash [Member]
Cash [Member]
Receivables - Related Party [Member]
Receivables - Related Party [Member]
Receivables - Related Party [Member]
Receivables Excluding Third Party [Member]
Receivables Excluding Third Party [Member]
Receivables Excluding Third Party [Member]
Other Current Assets [Member]
Other Current Assets [Member]
Property, Plant and Equipment [Member]
Property, Plant and Equipment [Member]
Other Noncurrent Assets [Member]
Other Noncurrent Assets [Member]
Accounts Payable [Member]
Accounts Payable [Member]
Accounts Payable - Related Party [Member]
Accounts Payable - Related Party [Member]
Accounts Payable - Related Party [Member]
Revolving Credit Facility [Member]
Long-term Debt [Member]
Long-term Debt [Member]
Variable Interest Entities [Axis]
Variable Interest Entities [Axis]
Variable Interest Entity, Classification [Domain]
Variable Interest Entity, Classification [Domain]
Variable Interest Entity, Primary Beneficiary [Member]
Variable Interest Entity, Primary Beneficiary [Member]
Current assets
Variable Interest Entity, Consolidated, Assets, Current
Non-current assets
Variable Interest Entity, Consolidated, Assets, Noncurrent
Total Assets
Variable Interest Entity, Consolidated, Carrying Amount, Assets
Liabilities:
Liabilities [Abstract]
Current liabilities
Variable Interest Entity, Consolidated, Liabilities, Current
Non-current liabilities
Variable Interest Entity, Consolidated, Liabilities, Noncurrent
Total Liabilities
Variable Interest Entity, Consolidated, Carrying Amount, Liabilities
Schedule of Segment Reporting Information, by Segment [Table]
Schedule of Segment Reporting Information, by Segment [Table]
E&P Division [Member]
E&P Division [Member]
E&P Division [Member]
Segment Reporting Information [Line Items]
Segment Reporting Information [Line Items]
Number of Divisions
Number of Divisions
Number of Divisions
Number of reportable segments
Number of Reportable Segments
Variable interest entity, ownership percentage
Variable Interest Entity, Qualitative or Quantitative Information, Ownership Percentage
Disposal Groups, Including Discontinued Operations
Disposal Groups, Including Discontinued Operations [Table Text Block]
Components of Pension Plan Net Periodic Benefit Cost
Pension and Other Postretirement Benefits Disclosure [Text Block]
Schedule of Related Party Transactions, by Related Party [Table]
Schedule of Related Party Transactions, by Related Party [Table]
Total Current Liabilities [Member]
Total Current Liabilities [Member]
Total Current Liabilities [Member]
Total Deferred Credits and Other Liabilities [Member]
Total Deferred Credits and Other Liabilities [Member]
Total Deferred Credits and Other Liabilities [Member]
Related Party [Axis]
Related Party [Axis]
Related Party [Domain]
Related Party [Domain]
CONSOL Energy [Member]
CONSOL Energy [Member]
CONSOL Energy [Member]
Related Party Transaction [Line Items]
Related Party Transaction [Line Items]
Receivable from related party
Accounts Receivable, Related Parties
Due to related parties
Due to Related Parties
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table]
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table]
Antidilutive Securities Excluded from Computation of Earnings Per Share, by Antidilutive Securities [Axis]
Antidilutive Securities [Axis]
Antidilutive Securities, Name [Domain]
Antidilutive Securities, Name [Domain]
Restricted Stock Units (RSUs) [Member]
Performance Share Units [Member]
Performance Share Options [Member]
Performance Share Options [Member]
Performance Share Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from the computation of diluted earnings per share (in shares)
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount
Fair Value of Assets Acquired:
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets [Abstract]
Cash and Cash Equivalents
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents
Accounts and Notes Receivable
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Notes and Accounts Receivables
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Notes and Accounts Receivables
Prepaid Expense
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Prepaid Expense and Other Assets
Other Current Assets
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Other
Property, Plant and Equipment, Net
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment
Intangible Assets
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill
Other
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets
Total Assets Acquired
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets
Fair Value of Liabilities Assumed:
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities [Abstract]
Accounts Payable
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable
CNXM Revolving Credit Facility
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Long-term Debt
Total Liabilities Assumed
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities
Total Identifiable Net Assets
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract]
Total Identifiable Net Assets
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net
Fair Value of Noncontrolling Interest in CNXM
Business Combination, Acquisition of Less than 100 Percent, Noncontrolling Interest, Fair Value
Net Assets Acquired
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Less Noncontrolling Interest
Other intangible assets
Impairment of Other Intangible Assets
Amortization expense
Amortization of Intangible Assets
Useful life, customer relationship intangible assets
Finite-Lived Intangible Asset, Useful Life
Shirley-Penns System
Shirley-Penns System [Member]
Shirley-Penns System [Member]
Legal Entity [Axis]
Legal Entity [Axis]
Entity [Domain]
Entity [Domain]
CNX Midstream Partners LP [Member]
CNX Midstream Partners LP [Member]
CNX Midstream Partners LP [Member]
Senior Notes due March 2026 [Member]
Payable to affiliates
Accounts Payable to Affiliates, Accrued but Unpaid Gathering Services
Accounts Payable to Affiliates, Accrued but Unpaid Gathering Services
Gathering Revenue - Related Party
Revenue from Related Parties
Gathering Revenue - Third Party
Gathering Revenue Excluding Related Party
Gathering Revenue Excluding Related Party
Operating Expense - Related Party
Related Party Transaction, Expenses from Transactions with Related Party
Operating Expense - Third Party
Operating Expense Excluding Related Party
Operating Expense Excluding Related Party
General and Administrative Expense - Related Party
Related Party Transaction, Selling, General and Administrative Expenses from Transactions with Related Party
General and Administrative Expense - Third Party
General and Administrative Expense Excluding Related Party
General and Administrative Expense Excluding Related Party
Loss on Asset Sales
Depreciation Expense
Depreciation
Interest Expense
Interest Expense
Total Expense
Costs and Expenses
Net Cash Provided by Operating Activities
Net Cash Provided by (Used in) Operating Activities
Net Cash Used in Investing Activities
Net Cash Provided by (Used in) Investing Activities
Net Cash Provided by (Used in) Financing Activities
Net Cash Provided by (Used in) Financing Activities
Short-term Debt, Other Disclosures [Abstract]
Schedule of Short-term Debt [Table]
Schedule of Short-term Debt [Table]
5.875% Senior Notes due 2022 [Member]
5.875% Senior Notes due 2022 [Member]
5.875% Senior Notes due 2022 [Member]
Range [Axis]
Range [Axis]
Range [Domain]
Range [Domain]
Minimum [Member]
Minimum [Member]
Maximum [Member]
Maximum [Member]
Short-term Debt [Line Items]
Short-term Debt [Line Items]
Credit facility, face amount
Accordion feature, increased commitment
Line of Credit Facility, Accordion Feature, Increase Limit
Line of Credit Facility, Accordion Feature, Increase Limit
Initial borrowing base
Debt Instrument, Borrowing Base
Debt Instrument, Borrowing Base
Letters of credit aggregate sub-limit
Line of Credit Facility, Maximum Borrowing Capacity
Number of days outstanding, prior to springing maturity date
Number Of Days Outstanding, Prior To Springing Maturity Date, Debt Securities
Number Of Days Outstanding, Prior To Springing Maturity Date, Debt Securities
Minimum threshold to activate springing maturity date
Debt Instrument, Minimum Threshold to Activate Springing Maturity Date
Debt Instrument, Minimum Threshold to Activate Springing Maturity Date
Value of proved reserves, percentage to mortgage
Percentage to Mortgage, Value of Proved Reserves
Percentage to Mortgage, Value of Proved Reserves
Value of proved developing producing reserves, percentage to mortgage
Percentage to Mortgage, Value of Proved Developed Producing Reserves
Percentage to Mortgage, Value of Proved Developed Producing Reserves
Maximum net leverage ratio
Maximum Interest Ratio per Credit Facility Covenant
Maximum Interest Ratio per Credit Facility Covenant
Minimum current ratio
minimum current ratio per credit facility
minimum current ratio per credit facility
Borrowings outstanding
Long-term Line of Credit
Letters of credit outstanding
Letters Of Credit Amount Outstanding
Letters Of Credit, Amount Outstanding
Borrowings and issuance of letters of credit remaining capacity
Line of Credit Facility, Remaining Borrowing Capacity
Secured leverage ratio
Credit Facility, Debt Covenant, Secured Leverage Ratio
Credit Facility, Debt Covenant, Secured Leverage Ratio
Interest coverage ratio
Debt Instrument, Interest Coverage Ratio
Debt Instrument, Interest Coverage Ratio
Revolving Credit Facilities
Short-term Debt [Text Block]
Estimated annual amortization expense, Year 2019
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months
Estimated annual amortization expense, Year 2020
Finite-Lived Intangible Assets, Amortization Expense, Year Two
Estimated annual amortization expense, Year 2021
Finite-Lived Intangible Assets, Amortization Expense, Year Three
Estimated annual amortization expense, Year 2022
Finite-Lived Intangible Assets, Amortization Expense, Year Four
Estimated annual amortization expense, Year 2023
Finite-Lived Intangible Assets, Amortization Expense, Year Five
Unrecorded Unconditional Purchase Obligation [Table]
Unrecorded Unconditional Purchase Obligation [Table]
Unrecorded Unconditional Purchase Obligation by Category of Item Purchased [Axis]
Unrecorded Unconditional Purchase Obligation by Category of Item Purchased [Axis]
Unconditional Purchase Obligation, Category of Goods or Services Acquired [Domain]
Unconditional Purchase Obligation, Category of Goods or Services Acquired [Domain]
Purchase Commitment [Member]
Purchase Commitment [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Unrecorded Unconditional Purchase Obligation [Line Items]
Less than 1 year
Unrecorded Unconditional Purchase Obligation, Due in Next Twelve Months
1 - 3 years
Unrecorded Unconditional Purchase Obligation, Due within Three Years
3 - 5 years
Unrecorded Unconditional Purchase Obligation, Due within Five Years
More than 5 years
Unrecorded Unconditional Purchase Obligation, Due after Five Years
Total Purchase Obligations
Unrecorded Unconditional Purchase Obligation
Accumulated Other Comprehensive Income (Loss) [Line Items]
Changes in Accumulated Other Comprehensive Loss [Roll Forward]
Changes in Accumulated Other Comprehensive Loss [Roll Forward]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at December 31, 2017
Other Comprehensive Income before Reclassifications
Other Comprehensive Income (Loss), before Reclassifications, before Tax
Amounts Reclassified from Accumulated Other Comprehensive Loss, net of tax
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax
Current Period Other Comprehensive Income
Balance at September 30, 2018
Document Information [Abstract]
Document Information [Abstract]
Document Type
Document Type
Amendment Flag
Amendment Flag
Document Period End Date
Document Period End Date
Document Fiscal Year Focus
Document Fiscal Year Focus
Document Fiscal Period Focus
Document Fiscal Period Focus
Entity Registrant Name
Entity Registrant Name
Entity Central Index Key
Entity Central Index Key
Current Fiscal Year End Date
Current Fiscal Year End Date
Entity Filer Category
Entity Filer Category
Entity Small Business
Entity Small Business
Entity Emerging Growth Company
Entity Emerging Growth Company
Entity Common Stock, Shares Outstanding
Entity Common Stock, Shares Outstanding
Statement [Table]
Statement [Table]
Equity Components [Axis]
Equity Components [Axis]
Equity Component [Domain]
Equity Component [Domain]
Adjustment For Actuarially Determined Liabilities [Member]
Adjustment For Actuarially Determined Liabilities [Member]
Adjustment For Actuarially Determined Liabilities
Statement [Line Items]
Statement [Line Items]
Other comprehensive income, tax expense
Other Comprehensive Income (Loss), Tax
Statement of Stockholders' Equity [Abstract]
Other comprehensive income, tax expense (benefit)
Purchase and retirement of common stock (in shares)
Stock Repurchased and Retired During Period, Shares
Common Stock [Member]
Common Stock [Member]
Capital in Excess of Par Value [Member]
Additional Paid-in Capital [Member]
Retained Earnings [Member]
Retained Earnings [Member]
Accumulated Other Comprehensive Loss [Member]
AOCI Attributable to Parent [Member]
Total CNX Resources Corporation Stockholders' Equity [Member]
Parent [Member]
Noncontrolling Interest [Member]
Noncontrolling Interest [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance
Net Income
Other Comprehensive Income (Net of ($794) Tax)
Other Comprehensive Income (Loss), Net of Tax
Issuance of Common Stock
Stock Issued During Period, Value, New Issues
Purchase and Retirement of Common Stock (19,399,032 shares)
Shares Withheld for Taxes
Stock Granted, Value, Share-based Compensation, Forfeited
Acquisition of CNX Gathering, LLC
Noncontrolling Interest, Increase from Business Combination
Amortization of Stock-Based Compensation Awards
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition
Distributions to CNXM Noncontrolling Interest Holders
Noncontrolling Interest, Period Increase (Decrease)
Ending Balance
Commitments and Contingent Liabilities
Commitments and Contingencies Disclosure [Text Block]
Schedule of Costs Related to Purchase Obligations [Table]
Schedule of Costs Related to Purchase Obligations [Table]
Schedule of Costs Related to Purchase Obligations [Table]
Loss Contingency Nature [Axis]
Loss Contingency Nature [Axis]
Loss Contingency, Nature [Domain]
Loss Contingency, Nature [Domain]
Standby Letters of Credit [Member]
Standby Letters of Credit [Member]
Surety Bond [Member]
Surety Bond [Member]
Purchase Commitment, Excluding Long-term Commitment [Axis]
Purchase Commitment, Excluding Long-term Commitment [Axis]
Purchase Commitment, Excluding Long-term Commitment [Domain]
Purchase Commitment, Excluding Long-term Commitment [Domain]
Less Than 1 Year [Member]
Balance on First Anniversary [Member]
Balance on First Anniversary [Member]
1-3 Years [Member]
More Than One And Within Three Years From Balance Sheet Date [Member]
More than One and within Three Years from Balance Sheet Date
3-5 Years [Member]
More Than Three And Within Five Years From Balance Sheet Date [Member]
More than Three and within Five Years from Balance Sheet Date
Beyond 5 Years [Member]
Beyond Five Years of Balance Sheet Date [Member]
Beyond Five Years of Balance Sheet Date [Member]
Other Commitments [Axis]
Other Commitments [Axis]
Other Commitments [Domain]
Other Commitments [Domain]
Firm Transportation [Member]
Firm Transportation [Member]
Firm Transportation [Member]
Other Commitments [Member]
Other Commitments [Member]
Other Commitments
Employee Related Commitments [Member]
Employee Related Commitments [Member]
Employee Related Commitments
Environment Related Commitments [Member]
Environment Related Commitments [Member]
Environment Related Commitments
Loss Contingencies by Secondary Nature of Contingency [Member]
Loss Contingencies by Secondary Nature of Contingency [Member]
Loss Contingencies by Secondary Nature of Contingency [Member]
Schedule of Costs Related to Purchase Obligations [Line Items]
Schedule of Costs Related to Purchase Obligations [Line Items]
Schedule of Costs Related to Purchase Obligations [Line Items]
Guarantor obligations, maximum exposure
Guarantor Obligations, Maximum Exposure, Undiscounted
Schedule of Property, Plant and Equipment [Table]
Property, Plant and Equipment [Table]
Property, Plant and Equipment, Type [Axis]
Property, Plant and Equipment, Type [Axis]
Property, Plant and Equipment, Type [Domain]
Property, Plant and Equipment, Type [Domain]
Gas Segment [Member]
Gas Segment [Member]
Gas Segment
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment [Line Items]
Intangible drilling cost
Drilling Cost
Drilling Cost
Proved gas properties
Proved Oil and Gas Property, Successful Effort Method
Gas gathering equipment
Gas Gathering Systems Net
Gas Gathering Systems, Net
Unproved gas properties
Unproved Oil and Gas Property, Successful Effort Method
Gas wells and related equipment
Gas wells and related equipment
Gas Wells and Related Equipment
Surface land and other equipment
Surface Land And Other Equipment
Surface Land And Other Equipment
Other gas assets
Other gas assets
Other Gas Assets
Total Property, Plant and Equipment
Less: Accumulated Depreciation, Depletion and Amortization
Impairment on Knox
Impairment of Oil and Gas Properties
Recent Accounting Pronouncements
New Accounting Pronouncements, Policy [Policy Text Block]
Effective tax rate, percentage
Effective Income Tax Rate Reconciliation, Percent
Federal NOL carryback period
Income Taxes, Federal Net Operating Loss Carryback Period
Income Taxes, Federal Net Operating Loss Carryback Period
Income tax benefit, revaluation of deferred tax assets
Tax Cuts And Jobs Act Of 2017, Incomplete Accounting, Change In Tax Rate, Deferred Tax Asset, Provisional Income Tax Expense (Benefit)
Tax Cuts And Jobs Act Of 2017, Incomplete Accounting, Change In Tax Rate, Deferred Tax Asset, Provisional Income Tax Expense (Benefit)
Income tax benefit, reversal of valuation allowance for AMT credits
Tax Cuts And Jobs Act Of 2017, Incomplete Accounting, Change In Tax Rate, AMT Credits, Provisional Income Tax Expense (Benefit)
Tax Cuts And Jobs Act Of 2017, Incomplete Accounting, Change In Tax Rate, AMT Credits, Provisional Income Tax Expense (Benefit)
Financial statement benefit, NOL carryback
Tax Cuts And Jobs Act Of 2017, Incomplete Accounting, Change In Tax Rate, Federal Net Operating Loss Carryback, Provisional Income Tax Expense (Benefit)
Tax Cuts And Jobs Act Of 2017, Incomplete Accounting, Change In Tax Rate, Federal Net Operating Loss Carryback, Provisional Income Tax Expense (Benefit)
Total amount of uncertain tax positions
Unrecognized Tax Benefits
Unrecognized tax benefits that would impact effective tax rate
Unrecognized Tax Benefits that Would Impact Effective Tax Rate
Change in unrecognized tax benefits
Unrecognized Tax Benefits, Period Increase (Decrease)
Accrued interest liability
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued
Accrued interest expense
Unrecognized Tax Benefits, Interest on Income Taxes Accrued
Reduction of net operating loss
Income Tax Examination, Reduction to Net Operating Loss
Income Tax Examination, Reduction to Net Operating Loss
Discontinued Operations
Disposal Groups, Including Discontinued Operations, Disclosure [Text Block]
Commodity Swaps [Member]
Commodity Member [Member]
Commodity Member [Member]
Asset Derivative Instruments
Derivative Asset [Abstract]
Prepaid Expense
Derivative Asset, Current
Other Assets
Derivative Asset, Noncurrent
Total Asset
Liability Derivative Instruments
Derivative Liability [Abstract]
Other Accrued Liabilities
Derivative Liability, Current
Other Liabilities
Derivative Liability, Noncurrent
Total Liability
Derivative Liability
Statement of Cash Flows [Abstract]
Cash Flows from Operating Activities:
Net Cash Provided by (Used in) Operating Activities [Abstract]
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities:
Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract]
Net Income from Discontinued Operations
Depreciation, Depletion and Amortization
Depreciation, Depletion and Amortization
Amortization of Deferred Financing Costs
Amortization of Other Deferred Charges
Impairment of Exploration and Production Properties
Impairment of Exploration and Production Properties
Impairment of Exploration and Production Properties
Stock-Based Compensation
Share-based Compensation
Gain on Sale of Assets
Gain (Loss) on Disposition of Other Assets
Gain on Previously Held Equity Interest
Loss on Debt Extinguishment
Gain on Commodity Derivative Instruments
Net Cash Received (Paid) in Settlement of Commodity Derivative Instruments
Increase (Decrease) Cash Collateral from Counterparties
Deferred Income Taxes
Deferred Income Tax Expense (Benefit)
Equity in Earnings of Affiliates
Changes in Operating Assets:
Increase (Decrease) in Operating Assets [Abstract]
Accounts and Notes Receivable
Increase (Decrease) in Accounts and Notes Receivable
Recoverable Income Taxes
Increase (Decrease) in Income Taxes
Supplies Inventories
Increase (Decrease) in Inventories
Prepaid Expenses
Increase (Decrease) in Prepaid Expense
Changes in Other Assets
Increase (Decrease) in Other Operating Assets
Changes in Operating Liabilities:
Increase (Decrease) in Operating Liabilities [Abstract]
Accounts Payable
Increase (Decrease) in Accounts Payable
Accrued Interest
Increase (Decrease) in Interest Payable, Net
Other Operating Liabilities
Increase (Decrease) in Other Operating Liabilities
Changes in Other Liabilities
Increase (Decrease) in Other Accrued Liabilities
Net Cash Provided by Continuing Operating Activities
Net Cash Provided by (Used in) Operating Activities, Continuing Operations
Net Cash Provided by Discontinued Operating Activities
Cash Provided by (Used in) Operating Activities, Discontinued Operations
Net Cash Provided by Operating Activities
Cash Flows from Investing Activities:
Net Cash Provided by (Used in) Investing Activities [Abstract]
Capital Expenditures
Payments to Acquire Property, Plant, and Equipment
CNX Gathering LLC Acquisition, Net of Cash Acquired
Payments to Acquire Businesses, Net of Cash Acquired
Proceeds from Asset Sales
Net Distributions from Equity Affiliates
Proceeds Of Distributions From Equity Affiliates, Investing Activities
Proceeds Of Distributions From Equity Affiliates, Investing Activities
Net Cash (Used in) Provided by Continuing Investing Activities
Net Cash Provided by (Used in) Investing Activities, Continuing Operations
Net Cash Used in Discontinued Investing Activities
Cash Provided by (Used in) Investing Activities, Discontinued Operations
Net Cash (Used in) Provided by Investing Activities
Cash Flows from Financing Activities:
Net Cash Provided by (Used in) Financing Activities [Abstract]
Payments on Miscellaneous Borrowings
Repayments of Other Debt
Payments on Long-Term Notes
Payments On Long Term Notes Including Redemption Premium
Payments On Long Term Notes Including Redemption Premium
Net Payments on CNXM Revolving Credit Facility
Net Proceeds from Revolver - MLP
Net Proceeds from Revolver - MLP
Proceeds from CNX Revolving Credit Facility
Proceeds from Lines of Credit
Proceeds from Issuance of CNXM Senior Notes
Proceeds from Issuance of Long-term Debt
Distributions to CNXM Noncontrolling Interest Holders
Payments of Dividends
Proceeds from Issuance of Common Stock
Proceeds from Issuance of Common Stock
Shares Withheld for Taxes
Payments Related to Tax Withholding for Share-based Compensation
Purchases of Common Stock
Payments for Repurchase of Common Stock
Debt Repurchase and Financing Fees
Payments of Financing Costs
Net Cash Used in Continuing Financing Activities
Net Cash Provided by (Used in) Financing Activities, Continuing Operations
Net Cash Used in Discontinued Financing Activities
Cash Provided by (Used in) Financing Activities, Discontinued Operations
Net Cash Used in Financing Activities
Net (Decrease) Increase in Cash and Cash Equivalents
Cash and Cash Equivalents, Period Increase (Decrease)
Cash and Cash Equivalents at Beginning of Period
Cash and Cash Equivalents at End of Period
Senior Notes due April 2023 [Member]
Senior Notes Due April 2020 [Member]
Senior Notes Due April 2020 [Member]
Senior Notes Due April 2020 [Member]
Senior Notes Due March 2021 [Member]
Senior Notes Due March 2021 [Member]
Senior Notes Due March 2021 [Member]
Senior Notes Due April 2020 and Senior Notes Due March 2021 [Member]
Senior Notes Due April 2020 and Senior Notes Due March 2021 [Member]
Senior Notes Due April 2020 and Senior Notes Due March 2021 [Member]
Unamortized bond discount
Debt Instrument, Unamortized Discount
Purchase of outstanding debt
Debt Instrument, Purchase of Outstanding Debt
Debt Instrument, Purchase of Outstanding Debt
Gain (loss) on extinguishment of debt
Commodity Member [Member]
Notional amount
Derivative, Nonmonetary Notional Amount, Volume
Variable Interest Entities
Variable Interest Entity Disclosure [Text Block]
Payment terms for contract with customers
Contracts With Customers, Payment Terms
Contracts With Customers, Payment Terms
Receivables related to contracts with customers
Receivables related to acquisition
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables
Schedule of Goodwill
Schedule of Goodwill [Table Text Block]
Schedule of Finite-Lived Intangible Assets
Schedule of Finite-Lived Intangible Assets [Table Text Block]
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]
Oil and Gas [Member]
Oil and Gas [Member]
Customer [Axis]
Customer [Axis]
Customer [Domain]
Customer [Domain]
NJR Energy Services Company [Member]
NJR Energy Services Company [Member]
NJR Energy Services Company [Member]
Direct Energy Business Marketing LLC [Member]
Direct Energy Business Marketing LLC [Member]
Direct Energy Business Marketing LLC [Member]
Marcellus Shale [Member]
Marcellus Shale [Member]
Marcellus Shale
Utica Shale [Member]
Utica Shale [Member]
Utica Shale [Member]
Coalbed Methane [Member]
Coalbed Methane [Member]
Coalbed Methane
Other Gas [Member]
Other Gas [Member]
Other Gas
Gain on Commodity Derivative Instruments
Earnings (Loss) From Continuing Operations Before Income Tax
Segment Assets
Capital Expenditures
Segment Reporting - Capital Expenditures
Segment Reporting - Capital Expenditures
Equity in earnings of unconsolidated affiliates
Investments in unconsolidated equity affiliates
Changes in Accumulated Other Comprehensive Loss
Comprehensive Income (Loss) Note [Text Block]
Class of Stock [Axis]
Class of Stock [Axis]
Class of Stock [Domain]
Class of Stock [Domain]
Preferred Stock [Member]
Preferred Stock [Member]
Common Stock, Par Value (in usd per share)
Common Stock, Par or Stated Value Per Share
Common Stock, Authorized (in shares)
Common Stock, Shares Authorized
Common Stock, Issued (in shares)
Common Stock, Shares, Issued
Common Stock, Outstanding (in shares)
Common Stock, Shares, Outstanding
Preferred Stock, Authorized (in shares)
Preferred Stock, Shares Authorized
Preferred Stock, Issued (in shares)
Preferred Stock, Shares Issued
Preferred Stock, Outstanding (in shares)
Preferred Stock, Shares Outstanding
Natural Gas, NGLs and Oil Revenue [Member]
Natural Gas, Gathering, Transportation, Marketing and Processing [Member]
Natural Gas, Gathering, Transportation, Marketing and Processing [Member]
Oil and Gas, Exploration and Production [Member]
Oil and Gas, Exploration and Production [Member]
Revenues and Other Operating Income:
Revenues [Abstract]
Operating Expense
Operating Expenses [Abstract]
Lease Operating Expense
Operating Lease, Expense
Cost of Goods Sold
Cost of Goods and Services Sold
Production, Ad Valorem, and Other Fees
Production Tax Expense
Depreciation, Depletion and Amortization
E&P Depreciation, Depletion, and Amortization
E&P Depreciation, Depletion, and Amortization
Purchased Gas Costs
Production Royalty Interests and Purchased Gas Costs
Production Royalty Interests and Purchased Gas Costs
Impairment of Exploration and Production Properties
Impairment of Other Intangible Assets
Selling, General, and Administrative Costs
Results of Operations, General and Administrative Related to Oil and Gas Producing Activities
Other Operating Expense
Other Expenses
Total Operating Expense
Operating Expenses
Other (Income) Expense
Other Nonoperating Income (Expense) [Abstract]
Other Expense (Income)
Gain on Asset Sales
Total Other (Income) Expense
Nonoperating Income (Expense)
Earnings (Loss) from Continuing Operations Before Income Tax
Income Tax Expense
Income Tax Expense (Benefit)
Income (Loss) from Continuing Operations
(Loss) Income from Discontinued Operations, net
Net Income (Loss)
Schedule of Variable Interest Entities
Schedule of Variable Interest Entities [Table Text Block]
Investments in and Advances to Affiliates
Investments in and Advances to Affiliates [Table Text Block]
Schedule of Notional Amounts of Derivative Instruments
Schedule of Notional Amounts of Outstanding Derivative Positions [Table Text Block]
Schedule of Derivative Assets at Fair Value
Schedule of Derivative Assets at Fair Value [Table Text Block]
Schedule of Derivative Liabilities at Fair Value
Schedule of Derivative Liabilities at Fair Value [Table Text Block]
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block]