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Earnings Per Share Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Numerator:
Income (Loss) from Continuing Operations	$ 545,546	$ (91,007)
Less: Net Income Attributable to Noncontrolling Interest	17,983	0
Net Income (Loss) from Continuing Operations Attributable to CNX Resources Shareholders	527,563	(91,007)
Income from Discontinued Operations	0	52,041
Net Income (Loss) Attributable to CNX Resources Shareholders	$ 527,563	$ (38,966)
Denominator:
Weighted-average shares of common stock outstanding (in shares)	221,930,165	229,817,169
Effect of dilutive shares (in shares)	2,252,371	0
Weighted-average diluted shares of common stock outstanding (in shares)	224,182,536	229,817,169
Earnings (Loss) Per Share
Basic (Continuing Operations) (in usd per share)	$ 2.38	$ (0.40)
Basic (Discontinued Operations) (in usd per share)	0.00	0.23
Total Basic (in usd per share)	2.38	(0.17)
Dilutive (Continuing Operations) (in usd per share)	2.35	(0.40)
Dilutive (Discontinued Operations) (in usd per share)	0.00	0.23
Total Dilutive (in usd per share)	$ 2.35	$ (0.17)

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No definition available.

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Name:	us-gaap_WeightedAverageNumberOfSharesOutstandingBasicAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration