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v3.20.4

Acquisitions and Dispositions - Narrative (Details) a in Thousands |  |  |  |  |  |  | 1 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | ---
Sep. 28, 2020 USD ($) shares | Aug. 31, 2018 USD ($) a | May 02, 2018 USD ($) well | Mar. 30, 2018 USD ($) | Jan. 03, 2018 USD ($) | Dec. 14, 2017 USD ($) | May 31, 2018 USD ($) | Dec. 31, 2020 USD ($) a shares | Dec. 31, 2019 USD ($) shares | Dec. 31, 2018 USD ($)
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Common stock outstanding (in shares) | shares |  |  |  |  |  |  |  | 220,440,993 | 186,642,962 |
Entity shares issued per acquiree share (in shares) | shares | 0.88 |  |  |  |  |  |  |  |  |
Proved undeveloped acreage | a |  |  |  |  |  |  |  | 43,713 |  |
Proceeds from sale of assets |  |  |  |  |  |  |  | $ 48,322,000 | $ 45,160,000 | $ 511,767,000
Net gain (loss) on sale |  |  |  |  |  |  |  | 21,224,000 | 35,563,000 | 157,015,000
Impairment of other intangibles |  |  |  |  |  |  |  | 0 | 0 | 18,650,000
Gain on remeasurement of fair value of previously held equity interest |  |  |  |  |  |  |  | 0 | 0 | 623,663,000
CNX Gathering |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Ownership percentage in equity method investment |  |  |  |  |  | 50.00% |  |  |  |
Customer Relationships |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Impairment of other intangibles |  |  |  |  |  |  |  | 0 | $ 0 | 18,650,000
Ohio Utica Joint Venture Assets |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Proved undeveloped acreage | a |  | 26 |  |  |  |  |  |  |  |
Proceeds from sale of assets |  | $ 381,124,000 |  |  |  |  |  |  |  |
Net gain (loss) on sale |  | $ 130,710,000 |  |  |  |  |  |  |  |
Asset Exchange Agreement with HG Energy |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Net gain (loss) on sale |  |  | $ 286,000 |  |  |  |  |  |  |
Cash proceeds from Asset Exchange Agreement |  |  | $ 7,000,000 |  |  |  |  |  |  |
Number of wells added to existing commitment | well |  |  | 40 |  |  |  |  |  |  |
Shallow Oil, Gas, and CBM Assets in Pennsylvania and West Virginia |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Net gain (loss) on sale |  |  |  | $ 4,227,000 |  |  |  |  |  |
Cash consideration received in sale of oil and gas assets |  |  |  | 89,921,000 |  |  |  |  |  |
Asset retirement obligations assumed |  |  |  | $ 196,514,000 |  |  |  |  |  |
CNXM |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Common stock outstanding (in shares) | shares | 42,107,071 |  |  |  |  |  |  |  |  |
CNXM | Public Unitholders |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Ownership percentage in equity method investment | 46.90% |  |  |  |  |  |  |  |  |
CNXM | CNX |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Ownership percentage in equity method investment | 53.10% |  |  |  |  |  |  |  |  |
CNXM CNX Midstream GP LLC CNX Resources Holding LLC Merger Agreements |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Number of shares issued in acquisition | shares | 37,054,223 |  |  |  |  |  |  |  |  |
Cash consideration transferred | $ 384,623,000 |  |  |  |  |  |  |  |  |
Transaction costs |  |  |  |  |  |  |  | $ 11,271,000 |  |
Midstream |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Cash consideration transferred |  |  |  |  | $ 305,000,000 |  |  |  |  |
Fair value of previously held equity interest |  |  |  |  | $ 799,033,000 | $ 799,033,000 |  |  |  |
Gain on remeasurement of fair value of previously held equity interest |  |  |  |  |  | $ 623,663,000 |  |  |  |
Midstream | Customer Relationships |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Impairment of other intangibles |  |  |  |  |  |  | $ 18,650,000 |  |  | $ 18,650,000

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