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Basis of Presentation - Narrative (Details) - USD ($) $ in Thousands | Sep. 30, 2020 | Sep. 27, 2020 | Dec. 31, 2019
--- | --- | --- | ---
Business Acquisition [Line Items] |  |  |
Accounts Receivable - Trade | $ 76,007 |  | $ 133,480
Other Receivables | $ 9,167 |  | $ 16,142
CNXM | Public Unitholders |  |  |
Business Acquisition [Line Items] |  |  |
Ownership percentage of public unitholders |  | 46.90% |
CNXM | CNX |  |  |
Business Acquisition [Line Items] |  |  |
Ownership percentage by parent |  | 53.10% |

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