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Long-Term Debt - Schedule of Long-Term Debt (Details) - USD ($) | Dec. 31, 2021 | Dec. 31, 2020 | Apr. 30, 2020 | Mar. 31, 2020 | Dec. 31, 2019 | Jun. 30, 2019
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Debt Instrument [Line Items] |  |  |  |  |  |
Debt instrument, face amount |  |  | $ 1,000 |  |  |
Long-term Debt Including Current Maturities | $ 2,214,121,000 | $ 2,424,001,000 |  |  |  |
Less: Unamortized Debt Issuance Costs | 17,396,000 | 26,852,000 |  |  |  |
Less: Current Portion | 0 | 22,574,000 |  |  |  |
Long-Term Debt | $ 2,214,121,000 | 2,401,427,000 |  |  |  |
Senior Notes due March 2027 at 7.25% |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Stated rate, debt instrument | 0.0725% |  |  |  |  |
Debt instrument, face amount | $ 700,000,000 | 700,000,000 |  |  | $ 500,000,000 |
Debt Instrument, unamortized premium | 5,609,000 | 6,686,000 |  |  |  |
Long-term Debt Including Current Maturities | $ 705,609,000 | 706,686,000 |  |  |  |
Senior Notes due January 2029 at 6.00% |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Stated rate, debt instrument | 0.06% |  |  |  |  |
Long-term Debt Including Current Maturities | $ 500,000,000 | 500,000,000 |  |  |  |
Senior Notes due April 2030 |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Stated rate, debt instrument | 0.0475% |  |  |  |  |
Debt instrument, face amount | $ 400,000,000 |  |  |  |  |
Debt Instrument, unamortized premium | 4,808,000 |  |  |  |  |
Long-term Debt Including Current Maturities | $ 395,192,000 | 0 |  |  |  |
Senior Notes due May 2026 |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Stated rate, debt instrument | 0.0225% |  |  |  |  |
Debt instrument, face amount | $ 345,000,000 | 345,000,000 |  |  |  |
Debt instrument, unamortized discount | 91,284,000 | 107,735,000 |  |  |  |
Long-term Debt Including Current Maturities | $ 253,716,000 | $ 237,265,000 |  |  |  |
Senior Notes due March 2026 |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Stated rate, debt instrument | 6.50% | 0.065% |  |  |  |
Debt instrument, face amount |  | $ 400,000,000 |  |  |  |
Debt instrument, unamortized discount |  | 3,875,000 |  |  |  |
Long-term Debt Including Current Maturities | $ 0 | 396,125,000 |  |  |  |
Revolving Credit Facility |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  |  | $ 160,000,000
Revolving Credit Facility | CNX Revolving Credit Facility |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Long-term Debt Including Current Maturities | 192,000,000 | 160,800,000 |  |  |  |
Revolving Credit Facility | CNX Midstream Partners LP Revolving Credit Facility |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Long-term Debt Including Current Maturities | 185,000,000 | 291,000,000 |  |  |  |
Credit Facility |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Debt instrument, face amount |  |  |  | $ 175,000,000 |  |
Credit Facility | Cardinal States Gathering Company Credit Facility |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Debt instrument, face amount |  | 114,985,000 |  |  |  |
Debt instrument, unamortized discount |  | 1,126,000 |  |  |  |
Long-term Debt Including Current Maturities | 0 | 113,859,000 |  |  |  |
Credit Facility | CSG Holdings II LLC Credit Facility |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Debt instrument, face amount |  | 45,559,000 |  |  |  |
Debt instrument, unamortized discount |  | 441,000 |  |  |  |
Long-term Debt Including Current Maturities | $ 0 | $ 45,118,000 |  |  |  |

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