Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Capital in Excess of Par Value	Retained Earnings (Deficit)	Accumulated Other Comprehensive Income (Loss)	Total CNX Resources Stockholders’ Equity	Non- Controlling Interest
Beginning Balance at Dec. 31, 2018	$ 5,081,743	$ 1,990	$ 2,264,063	$ 2,071,809	$ (7,904)	$ 4,329,958	$ 751,785
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (Loss) Income	128,044			75,140		75,140	52,904
Issuance of Common Stock	161	8	153			161
Purchase and Retirement of Common Stock	(107,780)	(119)	(93,871)	(13,790)		(107,780)
Shares Withheld for Taxes	(6,222)			(5,532)		(5,532)	(690)
Amortization of Stock-Based Compensation Awards	34,776		33,624			33,624	1,152
Other Comprehensive Income	85				85	85
Distributions to CNXM Noncontrolling Interest Holders	(30,812)						(30,812)
Ending Balance at Jun. 30, 2019	5,099,995	1,879	2,203,969	2,127,627	(7,819)	4,325,656	774,339
Beginning Balance at Mar. 31, 2019	4,974,809	1,964	2,249,511	1,971,898	(7,860)	4,215,513	759,296
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (Loss) Income	192,694			162,477		162,477	30,217
Issuance of Common Stock	62	3	59			62
Purchase and Retirement of Common Stock	(74,283)	(88)	(68,934)	(5,261)		(74,283)
Shares Withheld for Taxes	(1,512)			(1,487)		(1,487)	(25)
Amortization of Stock-Based Compensation Awards	23,873		23,333			23,333	540
Other Comprehensive Income	41				41	41
Distributions to CNXM Noncontrolling Interest Holders	(15,689)						(15,689)
Ending Balance at Jun. 30, 2019	5,099,995	1,879	2,203,969	2,127,627	(7,819)	4,325,656	774,339
Beginning Balance at Dec. 31, 2019	4,962,309	1,870	2,199,605	1,971,676	(12,605)	4,160,546	801,763
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (Loss) Income	(435,709)			(474,835)		(474,835)	39,126
Issuance of Common Stock	1,654	8	1,646			1,654
Shares Withheld for Taxes	(1,953)			(1,644)		(1,644)	(309)
Amortization of Stock-Based Compensation Awards	9,406		8,522			8,522	884
Equity Component of Convertible Senior Notes, net of Issuance Costs	78,307		78,307			78,307
Purchase of Capped Call	(26,351)		(26,351)			(26,351)
Other Comprehensive Income	223				223	223
Distributions to CNXM Noncontrolling Interest Holders	(20,932)						(20,932)
Ending Balance at Jun. 30, 2020	4,566,954	1,878	2,261,729	1,495,197	(12,382)	3,746,422	820,532
Beginning Balance at Mar. 31, 2020	4,644,710	1,874	2,205,941	1,641,009	(12,493)	3,836,331	808,379
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (Loss) Income	(130,486)			(145,749)		(145,749)	15,263
Issuance of Common Stock	1,650	4	1,646			1,650
Shares Withheld for Taxes	(63)			(63)		(63)
Amortization of Stock-Based Compensation Awards	2,566		2,186			2,186	380
Equity Component of Convertible Senior Notes, net of Issuance Costs	78,307		78,307			78,307
Purchase of Capped Call	(26,351)		(26,351)			(26,351)
Other Comprehensive Income	111				111	111
Distributions to CNXM Noncontrolling Interest Holders	(3,490)						(3,490)
Ending Balance at Jun. 30, 2020	$ 4,566,954	$ 1,878	$ 2,261,729	$ 1,495,197	$ (12,382)	$ 3,746,422	$ 820,532