Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock and Capital in Excess of Par Value	Retained Earnings	Accumulated Other Comprehensive Loss	Total CNX Resources Corporation Stockholders' Equity	Noncontrolling Interest
Beginning Balance at Dec. 31, 2017	$ 3,899,899	$ 2,452,564	$ 1,455,811	$ (8,476)		$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of Common Stock		1,689
Purchase and Retirement of Common Stock		(155,191)	(141,543)
Amortization of Stock-Based Compensation Awards		14,086				1,775
Net Income	753,696		694,606			59,090
Shares Withheld for Taxes			(4,986)			(348)
Other Comprehensive Income				2,004
Distributions to CNXM Noncontrolling Interest Holders						(40,839)
Acquisition of CNX Gathering, LLC						718,577
Ending Balance at Sep. 30, 2018	5,048,819	2,313,148	2,003,888	(6,472)	$ 4,310,564	738,255
Beginning Balance at Jun. 30, 2018	5,038,923	2,374,788	1,940,507	(6,494)		730,122
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of Common Stock		126
Purchase and Retirement of Common Stock		(66,503)	(61,512)
Amortization of Stock-Based Compensation Awards		4,737				506
Net Income	146,756		125,029			21,727
Shares Withheld for Taxes			(136)			(1)
Other Comprehensive Income				22
Distributions to CNXM Noncontrolling Interest Holders						(14,099)
Acquisition of CNX Gathering, LLC						0
Ending Balance at Sep. 30, 2018	5,048,819	2,313,148	2,003,888	(6,472)	4,310,564	738,255
Beginning Balance at Dec. 31, 2018	5,081,743	2,266,053	2,071,809	(7,904)		751,785
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of Common Stock		211
Purchase and Retirement of Common Stock	(115,477)	(101,687)	(13,790)
Amortization of Stock-Based Compensation Awards		35,076				1,481
Net Income	272,004		190,679			81,325
Shares Withheld for Taxes			(5,594)			(690)
Other Comprehensive Income				126
Distributions to CNXM Noncontrolling Interest Holders						(47,062)
Acquisition of CNX Gathering, LLC						0
Ending Balance at Sep. 30, 2019	5,221,818	2,199,653	2,243,104	(7,778)	4,434,979	786,839
Beginning Balance at Jun. 30, 2019	5,099,995	2,205,848	2,127,627	(7,819)		774,339
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of Common Stock		49
Purchase and Retirement of Common Stock		(7,697)	0
Amortization of Stock-Based Compensation Awards		1,453				328
Net Income	143,960		115,538			28,422
Shares Withheld for Taxes			(61)			0
Other Comprehensive Income				41
Distributions to CNXM Noncontrolling Interest Holders						(16,250)
Acquisition of CNX Gathering, LLC						0
Ending Balance at Sep. 30, 2019	$ 5,221,818	$ 2,199,653	$ 2,243,104	$ (7,778)	$ 4,434,979	$ 786,839