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Variable Interest Entities Other Operating Income and Transportation, Gathering and Compression (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Variable Interest Entity [Line Items] |  |  |
Equity in Earnings | $ 2,103 | $ 5,363 | $ 49,830
CNX Gathering | Other Operating Income |  |  |
Variable Interest Entity [Line Items] |  |  |
Equity in Earnings |  | 9,823 |
CNX Gathering | Transportation, Gathering and Compression |  |  |
Variable Interest Entity [Line Items] |  |  |
Equity in Earnings |  | 914 |
CNXM | Other Operating Income |  |  |
Variable Interest Entity [Line Items] |  |  |
Equity in Earnings |  | 38,523 |
CNXM | Transportation, Gathering and Compression |  |  |
Variable Interest Entity [Line Items] |  |  |
Equity in Earnings |  | $ 136,068 |

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