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Long-Term Debt - Schedule of Long-Term Debt (Details) - USD ($) | Sep. 30, 2019 | Dec. 31, 2018 | Sep. 30, 2018
--- | --- | --- | ---
Debt Instrument [Line Items] |  |  |
Less: Unamortized Debt Issuance Costs | $ 9,568,000 | $ 8,796,000 |
Long-Term Debt | $ 2,640,234,000 | 2,378,205,000 |
Senior Notes due April 2022 |  |  |
Debt Instrument [Line Items] |  |  |
Stated rate, debt instrument | 5.875% |  | 5.875%
Debt instrument, face amount | $ 894,307,000 | 1,294,307,000 |
Debt instrument, unamortized premium | 1,108,000 | 2,069,000 |
Long-term debt, gross | $ 895,415,000 | 1,296,376,000 |
Senior Notes due March 2027 |  |  |
Debt Instrument [Line Items] |  |  |
Stated rate, debt instrument | 7.25% |  |
Debt instrument, face amount | $ 500,000,000 |  |
Long-term debt, gross | 500,000,000 | 0 |
Senior Notes due March 2026 |  |  |
Debt Instrument [Line Items] |  |  |
Stated rate, debt instrument |  |  | 6.50%
Debt instrument, face amount | 400,000,000 | 400,000,000 |
Debt instrument, unamortized discount | 4,813,000 | 5,375,000 |
Long-term debt, gross | 395,187,000 | 394,625,000 |
CNX Revolving Credit Facility | Revolving Credit Facility - CNXM |  |  |
Debt Instrument [Line Items] |  |  |
Long-term debt, gross | 613,200,000 | 612,000,000 |
CNX Midstream Partners LP Revolving Credit Facility | Revolving Credit Facility - CNXM |  |  |
Debt Instrument [Line Items] |  |  |
Long-term debt, gross | $ 246,000,000 | $ 84,000,000 |

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