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Acquisitions and Dispositions Pro Forma Financial Information (Details) - Midstream Acquisition [Member] - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 6 Months Ended
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Jun. 30, 2017 | Jun. 30, 2017
Business Acquisition [Line Items] |  |
Pro Forma Total Revenue and Other Operating Income | $ 395,774 | $ 740,411
Pro Forma Net Income from Continuing Operations | 150,789 | 92,979
Less: Pro Forma Net income Attributable to Noncontrolling Interests | 18,720 | 38,134
Pro Forma Net Income from Continuing Operations Attributable to CNX | $ 132,069 | $ 54,845
Pro Income Loss per Share from Continuing Operations (Basic) (usd per share) | $ 0.58 | $ 0.24
Pro Income Loss per Share from Continuing Operations (Diluted) (usd per share) | $ 0.58 | $ 0.24

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