Earnings Per Share - Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Numerator:
Net (Loss) Income	$ (188,793)	$ 143,960	$ (624,502)	$ 272,004
Less: Net Income Attributable to Noncontrolling Interest	15,905	28,422	55,031	81,325
Net (Loss) Income Attributable to CNX Resources Shareholders	$ (204,698)	$ 115,538	$ (679,533)	$ 190,679
Denominator:
Weighted-Average Shares of Common Stock Outstanding (in shares)	198,727,472	187,448,749	191,015,680	188,012,044
Effect of Diluted Shares (in shares)	0	982,210	0	1,548,899
Weighted-Average Diluted Shares of Common Stock Outstanding (in shares)	198,727,472	188,430,959	191,015,680	189,560,943
(Loss) Earnings per Share
Basic (in usd per share)	$ (1.03)	$ 0.62	$ (3.56)	$ 1.01
Diluted (in usd per share)	$ (1.03)	$ 0.61	$ (3.56)	$ 1.01