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Variable Interest Entities (Details) - USD ($) $ in Thousands |  | 6 Months Ended |  |
--- | --- | --- | --- | ---
Mar. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2017
Variable Interest Entity [Line Items] |  |  |  |
Payable to affiliates |  | $ 9,495 |  | $ 9,982
Variable Interest Entity, Primary Beneficiary [Member] |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |
Variable interest entity, ownership percentage |  | 34.00% |  |
CNX Midstream Partners LP [Member] | Senior Notes due March 2026 [Member] |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |
Stated rate, debt instrument |  |  | 6.50% |
Shirley-Penns System [Member] |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |
Ownership percentage by parent |  |  | 95.00% |
Cash consideration transferred | $ 265,000 |  |  |

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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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