Note 2 - Major Transactions	12 Months Ended
Dec. 31, 2020
Notes to Financial Statements
Acquisitions and Dispositions Disclosure [Text Block]	NOTE 2—MAJOR TRANSACTIONS: Merger with CONSOL Coal Resources LP On October 22, 2020, CONSOL Energy, the Partnership, the General Partner, a wholly-owned subsidiary of CONSOL Energy and one of its wholly-owned subsidiaries (“Merger Sub”) entered into a definitive merger agreement (the “Merger Agreement”) pursuant to which Merger Sub merged with and into the Partnership, with the Partnership surviving as an indirect, wholly-owned subsidiary of CONSOL Energy (the “Merger”). On December 30, 2020, the Merger was completed and CONSOL Energy issued 7,967,690 shares of common stock to acquire the 10,912,138 common units of CCR not owned by CONSOL Energy prior to the Merger at a fixed exchange ratio of 0.73 shares of CONSOL Energy common stock for each CCR unit, for total implied consideration of $51,710. As a result of the Merger, CCR's common units are no longer publicly traded. Except for the Partnership's incentive distribution rights, which were automatically canceled immediately prior to the effective time of the Merger for no consideration in accordance with CCR's partnership agreement, the interests in CCR owned by CONSOL Energy and its subsidiaries remain outstanding as limited partner interests in the surviving entity. The General Partner will continue to own the non-economic general partner interest in the surviving entity. Since CONSOL Energy controlled CCR prior to the Merger and continues to control CCR after the Merger, CONSOL Energy accounted for the change in its ownership interest in CCR as an equity transaction, which was reflected as a reduction of noncontrolling interest with corresponding increases to common stock and capital in excess of par value. No gain or loss was recognized in CONSOL Energy's Consolidated Statements of Income as a result of the Merger. The tax effects of the Merger were reported as adjustments to deferred income taxes and capital in excess of par value. Prior to the effective date of the Merger, public unitholders held a 39.3% equity interest in CCR's outstanding common units and CONSOL Energy owned the remaining 60.7% equity interest. The earnings of CCR that were attributed to its common units held by the public prior to the Merger are reflected in Net (Loss) Income Attributable to Noncontrolling Interest in the Consolidated Statements of Income. We incurred $9,822 of transaction costs directly attributable to the Merger during the year ended December 31, 2020, including financial advisory, legal service and other professional fees, which were recorded to Selling, General and Administrative Costs in the Consolidated Statements of Income. Settlement Transaction with Murray Energy On September 16, 2020, CONSOL entered into a settlement transaction with (i) Murray Energy Holdings Co., Murray Energy Corporation, and their direct and indirect subsidiaries (such entities that are debtors in possession in Murray Energy Holdings Co.’s jointly administered Chapter 11 cases, the “Debtors”) and (ii) ACNR Holdings, Inc. (together with its direct and indirect subsidiaries, “Murray NewCo”) to fully and finally resolve the disputes raised in the CONSOL Adversary Case and any and all other disputes, controversies, or causes of action between and among them related to (a) the Debtors’ rejection of the 2013 stock purchase agreement (“SPA”) and CONSOL’s waiver of any objection thereto; (b) the Debtors’ assumption and assignment to Murray NewCo (or its designated direct or indirect subsidiaries) and payment of certain cure and other amounts relating to the First Overriding Royalty Agreement, as amended, the Second Overriding Royalty Agreement, as amended, the Water Treatment Cost Sharing Agreement, as amended, and the Master Entry Driver Lease Agreement; (c) the Debtors’ assumption and assignment to Murray NewCo (or its designated direct or indirect subsidiaries) of the Cooperation and Safety Agreement, the Surface Use Agreement, the Substation and Power Line Agreement, the Substation and Power Line Rights-of-Way, the McMillian Assignment, the Partial Powerline Assignment, the 2013 Well Plugging Consent Order and Agreement, and the 2020 Well Plugging Agreement; (d) the Debtors’ and CONSOL’s continued cooperation about certain matters consistent with historical practice, including (i) with respect to each parties’ payment obligations related to certain claims relating to certain worker’s compensation, Black Lung, and long-term disability and (ii) with respect to easements and boundaries as set forth in the 2013 SPA and the Closing Land Letter Agreement; (e) the Debtors’ assumption of, and CONSOL’s payment of certain amounts relating to, the Split Leases; (f) CONSOL’s transfer to Murray NewCo (or its designated direct or indirect subsidiaries), and Murray NewCo’s (or its designated direct or indirect subsidiaries’) payment for, certain coalbed methane wells, gas wells, and land; (g) the usage by CONSOL of the power structure of Murray NewCo (or its designated direct or indirect subsidiaries) on agreed upon terms and the Debtors’ and Murray NewCo’s release of the alleged claim for CONSOL’s prior usage; (h) CONSOL’s dismissal of CONSOL Energy Inc. v Murray Energy Holdings Co., et al., Adversary Case 2:20-ap-02036, with prejudice, which dismissal will be contingent upon (1) the Debtors’ assumption and assignment to Murray NewCo (or its designated direct or indirect subsidiaries) of the Assumed CONSOL Agreements and (2) the Debtors’ compliance with the terms of the CONSOL Term Sheets and other agreements consistent with these transactions; and (i) certain other terms and conditions consistent with the foregoing. The foregoing agreements and compromises, which have been memorialized in definitive documentation, shall be treated as a single, integrated transaction. The effect of the agreements, as amended, in the normal course of business resulted in CONSOL recognizing (a) Miscellaneous Other Income of $18,561 related to the Sale of Certain Coal Lease Contracts and other income, (b) Gain on Sale of Assets of $6,230 related to the sale of certain gas wells and equipment, and (c) a reduction of Operating and Other Costs of $1,940 as a result of expense rebates offset with various cure costs, all of which are included in the Consolidated Statements of Income for the year ended December 31, 2020. As of December 31, 2020, the various transactions between the parties resulted in $4,867 of Other Receivables, net, and $22,055 of Other Assets, net, included in the Consolidated Balance Sheets. As of December 31, 2019, various transactions between the parties resulted in $13,567 of Other Receivables, net, included in the Consolidated Balance Sheets. See Note 22 - Commitments and Contingent Liabilities with respect to additional information relating to certain liabilities of the Company under the Coal Act (as defined below).

Note 2 - Major Transactions

12 Months Ended

Dec. 31, 2020

Acquisitions and Dispositions Disclosure [Text Block]

NOTE 2—MAJOR TRANSACTIONS:

Merger with CONSOL Coal Resources LP

On October 22, 2020, CONSOL Energy, the Partnership, the General Partner, a wholly-owned subsidiary of CONSOL Energy and one of its wholly-owned subsidiaries (“Merger Sub”) entered into a definitive merger agreement (the “Merger Agreement”) pursuant to which Merger Sub merged with and into the Partnership, with the Partnership surviving as an indirect, wholly-owned subsidiary of CONSOL Energy (the “Merger”). On December 30, 2020, the Merger was completed and CONSOL Energy issued 7,967,690 shares of common stock to acquire the 10,912,138 common units of CCR not owned by CONSOL Energy prior to the Merger at a fixed exchange ratio of 0.73 shares of CONSOL Energy common stock for each CCR unit, for total implied consideration of $51,710. As a result of the Merger, CCR's common units are no longer publicly traded.

Except for the Partnership's incentive distribution rights, which were automatically canceled immediately prior to the effective time of the Merger for no consideration in accordance with CCR's partnership agreement, the interests in CCR owned by CONSOL Energy and its subsidiaries remain outstanding as limited partner interests in the surviving entity. The General Partner will continue to own the non-economic general partner interest in the surviving entity.

Since CONSOL Energy controlled CCR prior to the Merger and continues to control CCR after the Merger, CONSOL Energy accounted for the change in its ownership interest in CCR as an equity transaction, which was reflected as a reduction of noncontrolling interest with corresponding increases to common stock and capital in excess of par value. No gain or loss was recognized in CONSOL Energy's Consolidated Statements of Income as a result of the Merger. The tax effects of the Merger were reported as adjustments to deferred income taxes and capital in excess of par value.

Prior to the effective date of the Merger, public unitholders held a 39.3% equity interest in CCR's outstanding common units and CONSOL Energy owned the remaining 60.7% equity interest. The earnings of CCR that were attributed to its common units held by the public prior to the Merger are reflected in Net (Loss) Income Attributable to Noncontrolling Interest in the Consolidated Statements of Income.

We incurred $9,822 of transaction costs directly attributable to the Merger during the year ended December 31, 2020, including financial advisory, legal service and other professional fees, which were recorded to Selling, General and Administrative Costs in the Consolidated Statements of Income.

Settlement Transaction with Murray Energy

On September 16, 2020, CONSOL entered into a settlement transaction with (i) Murray Energy Holdings Co., Murray Energy Corporation, and their direct and indirect subsidiaries (such entities that are debtors in possession in Murray Energy Holdings Co.’s jointly administered Chapter 11 cases, the “Debtors”) and (ii) ACNR Holdings, Inc. (together with its direct and indirect subsidiaries, “Murray NewCo”) to fully and finally resolve the disputes raised in the CONSOL Adversary Case and any and all other disputes, controversies, or causes of action between and among them related to (a) the Debtors’ rejection of the 2013 stock purchase agreement (“SPA”) and CONSOL’s waiver of any objection thereto; (b) the Debtors’ assumption and assignment to Murray NewCo (or its designated direct or indirect subsidiaries) and payment of certain cure and other amounts relating to the First Overriding Royalty Agreement, as amended, the Second Overriding Royalty Agreement, as amended, the Water Treatment Cost Sharing Agreement, as amended, and the Master Entry Driver Lease Agreement; (c) the Debtors’ assumption and assignment to Murray NewCo (or its designated direct or indirect subsidiaries) of the Cooperation and Safety Agreement, the Surface Use Agreement, the Substation and Power Line Agreement, the Substation and Power Line Rights-of-Way, the McMillian Assignment, the Partial Powerline Assignment, the 2013 Well Plugging Consent Order and Agreement, and the 2020 Well Plugging Agreement; (d) the Debtors’ and CONSOL’s continued cooperation about certain matters consistent with historical practice, including (i) with respect to each parties’ payment obligations related to certain claims relating to certain worker’s compensation, Black Lung, and long-term disability and (ii) with respect to easements and boundaries as set forth in the 2013 SPA and the Closing Land Letter Agreement; (e) the Debtors’ assumption of, and CONSOL’s payment of certain amounts relating to, the Split Leases; (f) CONSOL’s transfer to Murray NewCo (or its designated direct or indirect subsidiaries), and Murray NewCo’s (or its designated direct or indirect subsidiaries’) payment for, certain coalbed methane wells, gas wells, and land; (g) the usage by CONSOL of the power structure of Murray NewCo (or its designated direct or indirect subsidiaries) on agreed upon terms and the Debtors’ and Murray NewCo’s release of the alleged claim for CONSOL’s prior usage; (h) CONSOL’s dismissal of CONSOL Energy Inc. v Murray Energy Holdings Co., et al., Adversary Case 2:20-ap-02036, with prejudice, which dismissal will be contingent upon (1) the Debtors’ assumption and assignment to Murray NewCo (or its designated direct or indirect subsidiaries) of the Assumed CONSOL Agreements and (2) the Debtors’ compliance with the terms of the CONSOL Term Sheets and other agreements consistent with these transactions; and (i) certain other terms and conditions consistent with the foregoing. The foregoing agreements and compromises, which have been memorialized in definitive documentation, shall be treated as a single, integrated transaction. The effect of the agreements, as amended, in the normal course of business resulted in CONSOL recognizing (a) Miscellaneous Other Income of $18,561 related to the Sale of Certain Coal Lease Contracts and other income, (b) Gain on Sale of Assets of $6,230 related to the sale of certain gas wells and equipment, and (c) a reduction of Operating and Other Costs of $1,940 as a result of expense rebates offset with various cure costs, all of which are included in the Consolidated Statements of Income for the year ended December 31, 2020. As of December 31, 2020, the various transactions between the parties resulted in $4,867 of Other Receivables, net, and $22,055 of Other Assets, net, included in the Consolidated Balance Sheets. As of December 31, 2019, various transactions between the parties resulted in $13,567 of Other Receivables, net, included in the Consolidated Balance Sheets. See Note 22 - Commitments and Contingent Liabilities with respect to additional information relating to certain liabilities of the Company under the Coal Act (as defined below).