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Schedule of Long-Term Debt (Details) - USD ($)	Jun. 30, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Long-term debt, gross	$ 2,330,780,000	$ 2,187,289,000
Less: Unamortized Debt Issuance Costs	11,474,000	17,536,000
Less: Amounts Due in One Year	0	263,000
Long-Term Debt	2,330,780,000	2,187,026,000
Current portion of capital lease obligation	6,915,000	6,848,000
Senior Notes Due April 2022 [Member]
Debt Instrument [Line Items]
Debt instrument, face amount	1,314,307,000	1,705,682,000
Debt instrument, unamortized premium	2,416,000	3,544,000
Long-term debt, gross	1,316,723,000	1,709,226,000
Senior Notes due April 2023 [Member]
Debt Instrument [Line Items]
Debt instrument, face amount	200,000,000	500,000,000
Debt instrument, unamortized discount	1,720,000	4,751,000
Long-term debt, gross	198,281,000	495,249,000
Senior Notes due March 2026 [Member]
Debt Instrument [Line Items]
Debt instrument, face amount	400,000,000
Debt instrument, unamortized discount	5,750,000
Long-term debt, gross	394,250,000	0
Other Note Maturing in 2018 [Member]
Debt Instrument [Line Items]
Debt instrument, face amount		358,000
Debt instrument, unamortized discount		8,000
Long-term debt, gross	0	350,000
CNX Revolving Credit Facility [Member] | Revolving Credit Facility - CNXM [Member]
Debt Instrument [Line Items]
Long-term debt, gross	422,000,000	0
CNX Midstream Partners LP Revolving Credit Facility [Member] | Revolving Credit Facility - CNXM [Member]
Debt Instrument [Line Items]
Long-term debt, gross	$ 11,000,000	$ 0

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