CNX Resources (CNX) 10-Q 3 May 18 2018 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2018	Apr. 16, 2018
Document Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q1
Entity Registrant Name	CNX Resources Corporation
Entity Central Index Key	1,070,412
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		217,910,958

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Revenues and Other Operating Income:
Natural Gas, NGLs and Oil Revenue	$ 405,623	$ 317,763
Gain (Loss) on Commodity Derivative Instruments	35,087	(22,463)
Purchased Gas Revenue	18,055	8,979
Midstream Revenue	26,254	0
Other Operating Income	10,710	15,650
Total Revenue and Other Operating Income	495,729	319,929
Operating Expense
Lease Operating Expense	36,810	21,633
Transportation, Gathering and Compression	86,261	94,332
Production, Ad Valorem, and Other Fees	9,233	9,329
Depreciation, Depletion and Amortization	124,667	95,678
Exploration and Production Related Other Costs	2,380	9,785
Purchased Gas Costs	17,054	8,895
Impairment of Exploration and Production Properties	0	137,865
Selling, General, and Administrative Costs	31,349	21,802
Other Operating Expense	16,047	18,176
Total Operating Expense	323,801	417,495
Other (Income) Expense
Other (Income) Expense	(6,493)	4,075
Gain on Asset Sales	(11,342)	(3,996)
Gain on Previously Held Equity Interest	(623,663)	0
Loss (Gain) on Debt Extinguishment	15,635	(822)
Interest Expense	38,551	41,606
Total Other (Income) Expense	(587,312)	40,863
Total Costs And Expenses	(263,511)	458,358
Earnings (Loss) From Continuing Operations Before Income Tax	759,240	(138,429)
Income Tax Expense (Benefit)	213,694	(47,422)
Income (Loss) From Continuing Operations	545,546	(91,007)
Income From Discontinued Operations, net	0	52,041
Net Income (Loss)	545,546	(38,966)
Less: Net Income Attributable to Noncontrolling Interest	17,983	0
Net Income (Loss) Attributable to CNX Resources Shareholders	$ 527,563	$ (38,966)

Consolidated Statements of Inc3

Consolidated Statements of Income Earnings Per Share - $ / shares	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Earnings Per Share, Basic [Abstract]
Income (Loss) from Continuing Operations (in usd per share)	$ 2.38	$ (0.40)
Income from Discontinued Operations (in usd per share)	0	0.23
Total Basic (in usd per share)	2.38	(0.17)
Dilutive
Income (Loss) from Continuing Operations (in usd per share)	2.35	(0.40)
Income from Discontinued Operations (in usd per share)	0	0.23
Total Dilutive (in usd per share)	2.35	(0.17)
Dividends Declared Per Share	$ 0	$ 0

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Statement of Comprehensive Income [Abstract]
Net Income (Loss)	$ 545,546	$ (38,966)
Other Comprehensive Income:
Actuarially Determined Long-Term Liability Adjustments (Net of tax: ($94), ($2,052))	170	3,502
Comprehensive Income	545,716	(35,464)
Less: Comprehensive Income Attributable to Noncontrolling Interest	17,983	0
Comprehensive Income (Loss) Attributable to CNX Resources Shareholders	$ 527,733	$ (35,464)

Consolidated Statements of Com5

Consolidated Statements of Comprehensive Income (Parentheticals) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Other Comprehensive Income (Loss), Tax	$ 94
Adjustment For Actuarially Determined Liabilities [Member]
Other Comprehensive Income (Loss), Tax	$ (94)	$ (2,052)

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Current Assets:
Cash and Cash Equivalents	$ 82,490	$ 509,167
Accounts and Notes Receivable:
Trade	157,605	156,817
Other Receivables	43,344	48,908
Supplies Inventories	10,676	10,742
Recoverable Income Taxes	20,178	31,523
Prepaid Expenses	92,651	95,347
Total Current Assets	406,944	852,504
Property, Plant and Equipment:
Property, Plant and Equipment	9,103,351	9,316,495
Less—Accumulated Depreciation, Depletion and Amortization	2,481,535	3,526,742
Total Property, Plant and Equipment—Net	6,621,816	5,789,753
Other Assets:
Investment in Affiliates	20,678	197,921
Goodwill	796,359	0
Other Intangible Assets	126,859	0
Other	149,573	91,735
Total Other Assets	1,093,469	289,656
TOTAL ASSETS	8,122,229	6,931,913
Current Liabilities:
Accounts Payable	193,901	211,161
Current Portion of Long-Term Debt	6,891	7,111
Other Accrued Liabilities	236,879	223,407
Total Current Liabilities	437,671	441,679
Long-Term Debt:
Long-Term Debt	2,211,165	2,187,026
Capital Lease Obligations	18,611	20,347
Total Long-Term Debt	2,229,776	2,207,373
Deferred Credits and Other Liabilities:
Deferred Income Taxes	258,220	44,373
Asset Retirement Obligations	7,985	198,768
Other	120,671	139,821
Total Deferred Credits and Other Liabilities	386,876	382,962
TOTAL LIABILITIES	3,054,323	3,032,014
Stockholders’ Equity:
Common Stock, $.01 Par Value; 500,000,000 Shares Authorized, 218,639,873 Issued and Outstanding at March 31, 2018; 223,743,322 Issued and Outstanding at December 31, 2017	2,190	2,241
Capital in Excess of Par Value	2,409,475	2,450,323
Preferred Stock, 15,000,000 shares authorized, None issued and outstanding	0	0
Retained Earnings	1,940,882	1,455,811
Accumulated Other Comprehensive Loss	(8,306)	(8,476)
Total CNX Resources Stockholders’ Equity	4,344,241	3,899,899
Noncontrolling Interest	723,665	0
TOTAL STOCKHOLDERS' EQUITY	5,067,906	3,899,899
TOTAL LIABILITIES AND EQUITY	$ 8,122,229	$ 6,931,913

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parentheticals) - $ / shares	Mar. 31, 2018	Dec. 31, 2017
Common Stock [Member]
Common Stock, Par Value (in usd per share)	$ 0.01	$ 0.01
Common Stock, Authorized (in shares)	500,000,000	500,000,000
Common Stock, Issued (in shares)	218,639,873	223,743,322
Common Stock, Outstanding (in shares)	218,639,873	223,743,322
Preferred Stock [Member]
Preferred Stock, Authorized (in shares)	15,000,000	15,000,000
Preferred Stock, Issued (in shares)	0	0
Preferred Stock, Outstanding (in shares)	0	0

Consolidated Statements of Stoc

Consolidated Statements of Stockholders' Equity - 3 months ended Mar. 31, 2018 - USD ($) $ in Thousands	Total	Common Stock [Member]	Capital in Excess of Par Value [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Loss [Member]	Total CNX Resources Corporation Stockholders' Equity [Member]	Noncontrolling Interest [Member]
Balance at December 31, 2017 at Dec. 31, 2017	$ 3,899,899	$ 2,241	$ 2,450,323	$ 1,455,811	$ (8,476)	$ 3,899,899	$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	545,546			527,563		527,563	17,983
Other Comprehensive Income (Net of ($94) Tax)	170				170	170
Comprehensive Income	545,716			527,563	170	527,733	17,983
Stock Issued During Period, Value, New Issues	1,056	6	1,050			1,056
Purchase and Retirement of Common Stock (5,785,900 shares)	(83,963)	(57)	(46,229)	(37,677)		(83,963)
Shares Withheld for Taxes	(5,162)			(4,815)		(4,815)	(347)
Acquisition of CNX Gathering, LLC	718,577						718,577
Amortization of Stock-Based Compensation Awards	4,910		4,331			4,331	579
Distributions to CNXM Noncontrolling Interest Holders	(13,127)						(13,127)
Balance at March 31, 2018 at Mar. 31, 2018	$ 5,067,906	$ 2,190	$ 2,409,475	$ 1,940,882	$ (8,306)	$ 4,344,241	$ 723,665

Consolidated Statements of Sto9

Consolidated Statements of Stockholders' Equity (Parentheticals) $ in Thousands	3 Months Ended
	Mar. 31, 2018USD ($)shares
Statement of Stockholders' Equity [Abstract]
Other comprehensive income, tax expense | $	$ 94
Purchase and retirement of common stock (in shares) | shares	5,785,900

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Cash Flows from Operating Activities:
Net Income (Loss)	$ 545,546	$ (38,966)
Adjustments to Reconcile Net Income (Loss) to Net Cash Provided By Operating Activities:
Net Income from Discontinued Operations	0	(52,041)
Depreciation, Depletion and Amortization	124,667	95,678
Amortization of Deferred Financing Costs	3,043	0
Impairment of Exploration and Production Properties	0	137,865
Stock-Based Compensation	4,910	3,754
Gain on Sale of Assets	(11,342)	(3,996)
Gain on Previously Held Equity Interest	(623,663)	0
Loss (Gain) on Debt Extinguishment	15,635	(822)
(Gain) Loss on Commodity Derivative Instruments	(35,087)	22,463
Net Cash Paid in Settlement of Commodity Derivative Instruments	(16,991)	(47,103)
Deferred Income Taxes	213,694	(24,321)
Equity in Earnings of Affiliates	(1,778)	(12,330)
Changes in Operating Assets:
Accounts and Notes Receivable	14,505	9,969
Recoverable Income Taxes	11,345	(7,704)
Supplies Inventories	66	592
Prepaid Expenses	(1,055)	437
Changes in Operating Liabilities:
Accounts Payable	2,152	24,954
Accrued Interest	24,905	35,769
Other Operating Liabilities	(5,251)	11,997
Changes in Other Liabilities	(5,500)	(4,051)
Other	(461)	10,930
Net Cash Provided by Continuing Operating Activities	259,340	163,074
Net Cash Provided by Discontinued Operating Activities	0	48,721
Net Cash Provided by Operating Activities	259,340	211,795
Cash Flows from Investing Activities:
Capital Expenditures	(232,485)	(103,922)
CNX Gathering, LLC Acquisition, Net of Cash Acquired	(299,272)	0
Proceeds from Asset Sales	101,763	9,868
Net Distributions from Equity Affiliates	3,650	5,909
Net Cash Used in Continuing Investing Activities	(426,344)	(88,145)
Net Cash Provided by Discontinued Investing Activities	0	503
Net Cash Used in Investing Activities	(426,344)	(87,642)
Cash Flows from Financing Activities:
Payments on Miscellaneous Borrowings	(2,042)	(1,953)
Payments on Long-Term Notes	(405,419)	(98,243)
Net Payments on CNXM Revolving Credit Facility	(129,500)	0
Proceeds from Issuance of CNXM Senior Notes	394,000	0
Distributions to CNXM Noncontrolling Interest Holders	(13,127)	0
Proceeds from Issuance of Common Stock	1,056	494
Shares Withheld for Taxes	(5,162)	(6,278)
Purchases of Common Stock	(80,879)	0
Debt Repurchase and Financing Fees	(18,600)	(250)
Net Cash Used in Continuing Financing Activities	(259,673)	(106,230)
Net Cash Used in Discontinued Financing Activities	0	(10,456)
Net Cash Used in Financing Activities	(259,673)	(116,686)
Net (Decrease) Increase in Cash and Cash Equivalents	(426,677)	7,467
Cash and Cash Equivalents at Beginning of Period	509,167	46,299
Cash and Cash Equivalents at End of Period	$ 82,490	$ 53,766

Basis of Presentation

Basis of Presentation	3 Months Ended
	Mar. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	BASIS OF PRESENTATION: The accompanying Unaudited Consolidated Financial Statements have been prepared in accordance with generally accepted accounting principles for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by generally accepted accounting principles for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation have been included. Operating results for the three months ended March 31, 2018 are not necessarily indicative of the results that may be expected for future periods. The Consolidated Balance Sheet at December 31, 2017 has been derived from the Audited Consolidated Financial Statements at that date but does not include all the notes required by generally accepted accounting principles for complete financial statements. For further information, refer to the Consolidated Financial Statements and related notes for the year ended December 31, 2017 included in CNX Resources Corporation's ("CNX," the "Company," "we," "us," or "our") Annual Report on Form 10-K. Certain amounts in prior periods have been reclassified to conform to the current period presentation. On November 28, 2017, the Company spun-off the coal operations previously held by CNX, which were comprised of the Pennsylvania Mining Complex, Baltimore Marine Terminal, its direct and indirect ownership interest in CONSOL Coal Resources LP, formerly known as CNXC Coal Resources LP, and other related coal assets. The financial position, results of operations and cash flows of the coal operations are reflected as discontinued operations for all periods presented through the date of the spin-off. See Note 5 - Discontinued Operations to the Unaudited Consolidated Financial statements for further details regarding the spin-off. The Consolidated Balance Sheet at March 31, 2018 reflects the full consolidation of CNX Gathering, LLC's assets and liabilities as a result of the purchase of NBL Midstream, LLC's interest on January 3, 2018 (See Note 6 - Acquisitions and Dispositions for more information). The purchase accounting remains preliminary as contemplated by Generally Accepted Accounting Principles and, as a result, there may be upon further review future changes to the value, as well as allocation, of the acquired assets and liabilities, associated amortization expense, goodwill and the gain on the previously held equity interest. These changes may be material.

Earnings Per Share

Earnings Per Share	3 Months Ended
	Mar. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Earnings Per Share	EARNINGS PER SHARE: Basic earnings per share are computed by dividing net income attributable to CNX shareholders by the weighted average shares outstanding during the reporting period. Dilutive earnings per share are computed similarly to basic earnings per share, except that the weighted average shares outstanding are increased to include additional shares from stock options, performance stock options, restricted stock units and performance share units, if dilutive. The number of additional shares is calculated by assuming that outstanding stock options and performance share options were exercised, that outstanding restricted stock units and performance share units were released, and that the proceeds from such activities were used to acquire shares of common stock at the average market price during the reporting period. The impact of CNXM's dilutive units did not have a material impact on the Company's earnings per share calculations for the period from January 3, 2018 through March 31, 2018. The table below sets forth the share-based awards that have been excluded from the computation of diluted earnings per share because their effect would be antidilutive: For the Three Months Ended March 31, 2018 2017 Antidilutive Options 2,293,506 5,472,165 Antidilutive Restricted Stock Units 11,480 951,320 Antidilutive Performance Share Units 312,296 1,762,690 Antidilutive Performance Stock Options 927,268 802,804 3,544,550 8,988,979 The table below sets forth the share-based awards that have been exercised or released: For the Three Months Ended March 31, 2018 2017 Options 153,718 61,624 Restricted Stock Units 171,137 334,040 Performance Share Units 357,596 560,936 682,451 956,600 The computations for basic and dilutive earnings per share are as follows: For the Three Months Ended March 31, 2018 2017 Income (Loss) from Continuing Operations $ 545,546 $ (91,007 ) Less: Net Income Attributable to Non-Controlling Interest 17,983 — Net Income (Loss) from Continuing Operations Attributable to CNX Resources Shareholders $ 527,563 $ (91,007 ) Income from Discontinued Operations — 52,041 Net Income (Loss) Attributable to CNX Resources Shareholders $ 527,563 $ (38,966 ) Weighted-average shares of common stock outstanding 221,930,165 229,817,169 Effect of dilutive shares 2,252,371 — Weighted-average diluted shares of common stock outstanding 224,182,536 229,817,169 Earnings (Loss) per Share: Basic (Continuing Operations) $ 2.38 $ (0.40 ) Basic (Discontinued Operations) — 0.23 Total Basic $ 2.38 $ (0.17 ) Dilutive (Continuing Operations) $ 2.35 $ (0.40 ) Dilutive (Discontinued Operations) — 0.23 Total Dilutive $ 2.35 $ (0.17 )

Changes in Accumulated Other Co

Changes in Accumulated Other Comprehensive Loss	3 Months Ended
	Mar. 31, 2018
Equity [Abstract]
Changes in Accumulated Other Comprehensive Loss	CHANGES IN ACCUMULATED OTHER COMPREHENSIVE LOSS: Changes in Accumulated Other Comprehensive Loss by component, net of tax, were as follows: Long-Term Liabilities Balance at December 31, 2017 $ (8,476 ) Amounts Reclassified from Accumulated Other Comprehensive Loss, net of tax 170 Balance at March 31, 2018 $ (8,306 ) The following table shows the reclassification of adjustments out of Accumulated Other Comprehensive Loss: For the Three Months Ended March 31, 2018 2017 Actuarially Determined Long-Term Liability Adjustments Amortization of Prior Service Costs $ (90 ) $ (749 ) Recognized Net Actuarial Loss 354 6,303 Total 264 5,554 Less: Tax Benefit 94 2,052 Net of Tax $ 170 $ 3,502

Revenue from Contract with Cust

Revenue from Contract with Customer	3 Months Ended
	Mar. 31, 2018
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer	REVENUE FROM CONTRACTS WITH CUSTOMERS: On January 1, 2018, the Company adopted Accounting Standards Update (ASU) No. 2014-09, Revenue from Contracts with Customers and all the related amendments (“new revenue standard”) using the modified retrospective method, which did not result in any changes to previously reported financial information. The updates related to the new revenue standard were applied only to contracts that were not complete as of January 1, 2018. Revenue from Contracts with Customers Revenues are recognized when control of the promised goods or services is transferred to the Company’s customers, in an amount that reflects the consideration the Company expects to be entitled to in exchange for those goods or services. The Company has elected to exclude all taxes from the measurement of transaction price. Nature of Performance Obligations At contract inception, the Company assesses the goods and services promised in its contracts with customers and identifies a performance obligation for each promised good or service that is distinct. To identify the performance obligations, the Company considers all of the goods or services promised in the contract regardless of whether they are explicitly stated or are implied by customary business practices. For natural gas, NGLs and oil, and purchased gas revenue, the Company generally considers the delivery of each unit (MMBtu or Bbl) to be a separate performance obligation that is satisfied upon delivery. Payment terms for these contracts typically require payment within 25 days of the end of the calendar month in which the hydrocarbons are delivered. A significant number of these contracts contain variable consideration because the payment terms refer to market prices at future delivery dates. In these situations, the Company has not identified a standalone selling price because the terms of the variable payments relate specifically to the Company’s efforts to satisfy the performance obligations. A portion of the contracts contain fixed consideration (i.e. fixed price contracts or contracts with a fixed differential to NYMEX or index prices). The fixed consideration is allocated to each performance obligation on a relative standalone selling price basis, which requires judgment from management. For these contracts, the Company generally concludes that the fixed price or fixed differentials in the contracts are representative of the standalone selling price. Revenue associated with natural gas, NGLs and oil as presented on the accompanying Consolidated Statement of Income represent the Company’s share of revenues net of royalties and excluding revenue interests owned by others. When selling natural gas, NGLs and oil on behalf of royalty owners or working interest owners, the Company is acting as an agent and thus reports the revenue on a net basis. Midstream revenue consists of revenues generated from natural gas gathering activities. The gas gathering services are interruptible in nature and include charges for the volume of gas actually gathered and do not guarantee access to the system. Volumetric based fees are based on actual volumes gathered. The Company generally considers the interruptible gathering of each unit (MMBtu) of natural gas represents a separate performance obligation. Payment terms for these contracts typically require payment within 25 days of the end of the calendar month in which the hydrocarbons are gathered. Transaction price allocated to remaining performance obligations ASC 606 requires that the Company disclose the aggregate amount of transaction price that is allocated to performance obligations that have not yet been satisfied. However, the guidance provides certain practical expedients that limit this requirement, including when variable consideration is allocated entirely to a wholly unsatisfied performance obligation or to a wholly unsatisfied promise to transfer a distinct good or service that forms part of a series. A significant portion of or natural gas, NGLs and oil and purchased gas revenue is short-term in nature with a contract term of one year or less. For those contracts, we have utilized the practical expedient in ASC 606-10-50-14 exempting the Company from disclosure of the transaction price allocated to remaining performance obligations if the performance obligation is part of a contract that has an original expected duration of one year or less. For revenue associated with contract terms greater than one year, a significant portion of the consideration in those contracts is variable in nature and the Company allocates the variable consideration in its contract entirely to each specific performance obligation to which it relates. Therefore, any remaining variable consideration in the transaction price is allocated entirely to wholly unsatisfied performance obligations. As such, the Company has not disclosed the value of unsatisfied performance obligations pursuant to the practical expedient. For revenue associated with contract terms greater than one year with a fixed price component, the aggregate amount of the transaction price allocated to remaining performance obligations was $ 7,938 as of March 31, 2018 . The Company expects to recognize revenue of $ 2,299 in the next 12 months and $ 1,847 over the following 12 months, with the remainder recognized thereafter. For revenue associated with our midstream contracts, which also have terms greater than one year, we have utilized the practical expedient in ASC 606-10-50-14 exempting the Company from disclosure of the transaction price allocated to remaining performance obligations if the variable consideration is allocated entirely to a wholly unsatisfied performance obligation. Under our midstream contracts the interruptible gathering of each unit of natural gas represents a separate performance obligation; therefore, future volumes are wholly unsatisfied and disclosure of the transaction price allocated to remaining performance obligations is not required. Prior-period performance obligations We record revenue in the month production is delivered to the purchaser. However, settlement statements for certain natural gas and NGL revenue may not be received for 30 to 90 days after the date production is delivered, and as a result, we are required to estimate the amount of production delivered to the purchaser and the price that will be received for the sale of the product. We record the differences between our estimates and the actual amounts received in the month that payment is received from the purchaser. We have existing internal controls for our revenue estimation process and related accruals, and any identified differences between our revenue estimates and actual revenue received historically have not been significant. For the three months ended March 31, 2018 and 2017, revenue recognized in the reporting period related to performance obligations satisfied in prior reporting periods was not material. Disaggregation of Revenue The following table is a disaggregation of our revenue by major sources: For the Three Months Ended March 31, 2018 2017 Revenue from Contracts with Customers Natural Gas Revenue $ 347,348 $ 273,546 NGLs Revenue 50,884 39,283 Condensate Revenue 6,503 4,305 Oil Revenue 888 629 Total Natural Gas, NGLs and Oil Revenue 405,623 317,763 Purchased Gas Revenue 18,055 8,979 Midstream Revenue 26,254 — Other Sources of Revenue and Other Operating Income Gain (Loss) on Commodity Derivative Instruments 35,087 (22,463 ) Other Operating Income 10,710 15,650 Total Revenue and Other Operating Income $ 495,729 $ 319,929 The disaggregated revenue information corresponds with the Company’s segment reporting. Contract balances We invoice customers once our performance obligations have been satisfied, at which point payment is unconditional. Accordingly, our contracts with customers do not give rise to contract assets or liabilities under ASC 606. The Company has no contract assets recognized from the costs to obtain or fulfill a contract with a customer. The opening and closing balances of the Company’s receivables related to contracts with customers were $ 156,817 and $ 157,605 , respectively. Included in this balance are receivables related to the January 3rd, 2018 acquisition of $9,353 (see Note - 6 for more information).

Discontinued Operations

Discontinued Operations	3 Months Ended
	Mar. 31, 2018
Discontinued Operations and Disposal Groups [Abstract]
Discontinued Operations	DISCONTINUED OPERATIONS: On November 28, 2017, CNX announced that it had completed the tax-free spin-off of its coal business resulting in two independent, publicly traded companies: (i) a coal company, CONSOL Energy, formerly known as CONSOL Mining Corporation and (ii) CNX, a natural gas exploration and production company. Following the separation, CONSOL Energy and its subsidiaries hold the coal assets previously held by CNX, including its Pennsylvania Mining Complex, Baltimore Marine Terminal, its direct and indirect ownership interest in CONSOL Coal Resources LP, formerly known as CNX Coal Resources LP, and other related coal assets previously held by CNX. As of the close of business on November 28, 2017, CNX's shareholders received one share of CONSOL Energy common stock for every eight shares of CNX's common stock held as of November 15, 2017 (the “Record Date”). The coal company has been reclassified to discontinued operations for all periods presented. The following table details selected financial information for the divested business included within discontinued operations: For the Three Months Ended March 31, 2017 Coal Revenue $ 316,448 Other Outside Sales 12,886 Freight-Outside Coal 12,282 Miscellaneous Other Income 17,396 Gain on Sale of Assets 7,955 Total Revenue and Other Income $ 366,967 Total Costs 315,829 Income From Operations Before Income Taxes $ 51,138 Income Tax Benefit (6,367 ) Less: Net Income Attributable to Noncontrolling Interest 5,464 Income From Discontinued Operations, net $ 52,041 There were no remaining major classes of assets or liabilities of discontinued operations at March 31, 2018 and December 31, 2017 .

Acquisitions and Dispositions

Acquisitions and Dispositions	3 Months Ended
	Mar. 31, 2018
Business Combinations [Abstract]
Acquisitions And Dispositions	ACQUISITIONS AND DISPOSITIONS: On March 30, 2018, CNX Gas Company LLC (CNX Gas), an indirect wholly owned subsidiary of CNX, completed the sale of substantially all of its shallow oil and gas assets and certain CBM assets in Pennsylvania and West Virginia for $87,510 in cash consideration. In connection with the sale, the buyer assumed approximately $196,514 of asset retirement obligations. The net gain on the sale was $4,751 and is included in the Gain on Asset Sales line of the Consolidated Statements of Income. On December 14, 2017, CNX Gas entered into a purchase agreement with NBL Midstream, LLC (Noble), pursuant to which CNX Gas acquired Noble’s 50% membership interest in CONE Gathering LLC (CNX Gathering), for a cash purchase price of $305,000 and the mutual release of all outstanding claims (the "Midstream Acquisition"). CNX Gathering owns a 100% membership interest in CONE Midstream GP LLC (the general partner), which is the general partner of CONE Midstream Partners LP (CNXM or the Partnership), which is a publicly traded master limited partnership formed in May 2014 by CNX Gas and Noble. In conjunction with the Midstream Acquisition, which closed on January 3, 2018, the general partner, the Partnership and CONE Gathering LLC changed their names to CNX Midstream GP LLC, CNX Midstream Partners LP, and CNX Gathering LLC, respectively. Prior to the Midstream Acquisition, the Company accounted for its 50% interest in CNX Gathering LLC as an equity method investment as the Company had the ability to exercise significant influence, but not control, over the operating and financial policies of the midstream operations. In conjunction with the Midstream Acquisition, the Company obtained a controlling interest in CNX Gathering LLC and, through CNX Gathering's ownership of the general partner, control over the Partnership. Accordingly, the Midstream Acquisition has been accounted for as a business combination using the acquisition method of accounting pursuant to Accounting Standards Codification Topic 805, Business Combinations , or ASC 805. ASC 805 requires that, in such business combination achieved in stages (or step acquisition), previously held equity interests are remeasured at fair value and any difference between the fair value and the carrying value of the equity interest held be recognized as a gain or loss on the statement of income. The fair value assigned to the previously held equity interest in CNX Gathering and CNXM for purposes of calculating the gain or loss was $799,033 and was determined using the income approach, based on a discounted cash flow methodology. The resulting gain on remeasurement to fair value of the previously held equity interest in the CNX Gathering and CNXM of $623,663 is included in the Gain on Previously Held Equity Interest line of the Consolidated Statements of Income. The fair values of the previously held equity interests were based on inputs that are not observable in the market and therefore represent Level 3 inputs. These fair values were measured using valuation techniques that convert future cash flows into a single discounted amount. Significant inputs to the valuation included estimates of: (i) gathering volumes; (ii) future operating costs; and (iii) a market-based weighted average cost of capital. These inputs required significant judgments and estimates by management, are still under review, and may be subject to change. These inputs have a significant impact on the valuation of the previously held equity interests and future changes may occur. The estimated fair value of midstream facilities and equipment, generally consisting of pipeline systems and compression stations, were estimated using the cost approach. Significant unobservable inputs in the estimate of fair value include management's assumptions about the replacement costs for similar assets, the relative age of the acquired assets and any potential economic or functional obsolescence associated with the acquired assets. As a result, the estimated fair value of the midstream facilities and equipment represents a Level 3 fair value measurement. As part of the preliminary purchase price allocation, the Company identified intangible assets for customer relationships with third party customers. The fair value of the identified intangible assets was determined using the income approach which requires a forecast of the expected future cash flows generated and an estimated market-based weighted average cost of capital. Significant unobservable inputs in the determination of fair value include future revenue estimates, future cost assumptions, and estimated customer retention rates. As a result, the estimated fair value of the identified intangible assets represents a Level 3 fair value measurement. Differences between the preliminary purchase price allocation and the final purchase price allocation may change the amount of intangible assets and goodwill ultimately recognized in conjunction with the Midstream Acquisition. The noncontrolling interest in the acquired business is comprised of the limited partner units in CNXM which were not acquired by the Company. The CNXM limited partner units are actively traded on the New York Stock Exchange, and were valued based on observable market prices as of the transaction date and therefore represent a Level 1 fair value measurement. Allocation of Purchase Price The following table summarizes the purchase price and estimated values of assets and liabilities assumed based on the fair value as of January 3, 2018, with any excess of the purchase price over the estimated fair value of the identified net assets acquired recorded as goodwill. The preliminary purchase price allocation will be subject to further refinement, which may result in material changes. Estimated Fair Value of Consideration Transferred: Cash Consideration $ 305,000 CNX Gathering Cash on Hand at January 3, 2018 Distributed to Noble 2,620 Fair Value of Previously Held Equity Interest 799,033 Total Estimated Fair Value of Consideration Transferred $ 1,106,653 The following is a summary of the preliminary estimated fair values of the net assets acquired: Fair Value of Assets Acquired: Cash and Cash Equivalents $ 8,348 Accounts and Notes Receivable 21,199 Prepaid Expense 2,006 Other Current Assets 163 Property, Plant and Equipment, Net 1,043,340 Intangible Assets 128,781 Other 593 Total Assets Acquired 1,204,430 Fair Value of Liabilities Assumed: Accounts Payable 26,059 CNXM Revolving Credit Facility 149,500 Total Liabilities Assumed 175,559 Total Identifiable Net Assets 1,028,871 Fair Value of Noncontrolling Interest in CNXM (718,577 ) Goodwill 796,359 Net Assets Acquired $ 1,106,653 Post-Acquisition Operating Results The acquisition contributed the following to the Company's Midstream segment for the three months ended March 31, 2018. Three Months Ended March 31, 2018 Midstream Revenue $ 64,178 Earnings From Continuing Operations Before Income Tax $ 35,550 Unaudited Pro Forma Information The following table presents unaudited pro forma combined financial information for the three months ended March 31, 2017, which presents the Company’s results as though the acquisition had been completed at January 1, 2017. The pro forma combined financial information has been included for comparative purposes and is not necessarily indicative of the results that might have actually occurred had the acquisition been completed at January 1, 2017; furthermore, the financial information is not intended to be a projection of future results. Pro Forma (in thousands, except per share data) (unaudited) Three Months Ended March 31, 2017 Pro Forma Total Revenue and Other Operating Income $ 344,637 Pro Forma Net Loss from Continuing Operations $ (57,810 ) Less: Pro Forma Net income Attributable to Noncontrolling Interests $ 19,414 Pro Forma Net Loss from Continuing Operations Attributable to CNX $ (77,224 ) Pro Forma Loss per Share from Continuing Operations (Basic) $ (0.34 ) Pro Forma Loss per Share from Continuing Operations (Diluted) $ (0.34 )

Components of Pension Plan Net

Components of Pension Plan Net Periodic Benefit Cost	3 Months Ended
	Mar. 31, 2018
Retirement Benefits [Abstract]
Components of Pension Plan Net Periodic Benefit Cost	COMPONENTS OF PENSION PLAN NET PERIODIC BENEFIT COST: Components of Net Periodic Benefit Cost are as follows: For the Three Months Ended March 31, 2018 2017 Service Cost $ 96 $ 44 Interest Cost 300 143 Amortization of Prior Service Credits (90 ) (43 ) Recognized Net Actuarial Loss 373 181 Net Periodic Benefit Cost $ 679 $ 325

Income Taxes

Income Taxes	3 Months Ended
	Mar. 31, 2018
Income Tax Disclosure [Abstract]
Income Taxes	INCOME TAXES: The effective tax rates for the three months ended March 31, 2018 and 2017 were 28.8% and 34.3% , respectively. The effective tax rate for the three months ended March 31, 2018 differs from the U.S. federal statutory rate of 21% primarily due to state taxes and state valuation allowances. The effective rate for the three months ended March 31, 2017 differs from the U.S. federal statutory rate of 35% primarily due to state income taxes and equity compensation. On December 22, 2017, the United States enacted the Tax Cuts and Jobs Act (the "Act") which, among other things, lowered the U.S. Federal tax rate from 35% to 21%, repealed the corporate alternative minimum tax ("AMT"), and provided for a refunds of previously accrued AMT credits. The Company recorded a net tax benefit to reflect the impact of the Act as of December 31, 2017, as it is required to reflect the change in the period in which the law is enacted. Largely, the benefits recorded in the period ending December 31, 2017 related to tax reform are in recognition of the revaluation of deferred tax assets and liabilities, a benefit of $115,291 , and a benefit for the reversal of a valuation allowance previously recorded against AMT credits which are now refundable, a benefit of $154,384 . The net benefits for the Act as recorded as provisional amounts as of March 31, 2018 represent the Company's best estimate using information available to the Company as of May 3, 2018. The Company anticipates U.S. regulatory agencies will issue further regulations over the next year which may alter this estimate. The Company is still evaluating, among other things, the application of limitations for executive compensation related to contracts existing prior to November 2, 2017, and provisions in the Act addressing the deductibility of interest expense after January 1, 2018. The Company will refine its estimates to incorporate new or better information as it comes available through the filing date of its 2017 U.S. income tax returns in the fourth quarter of 2018. The total amount of uncertain tax positions at March 31, 2018 and December 31, 2017 was $37,813 . If these uncertain tax positions were recognized, approximately $29,376 would affect CNX's effective tax rate at March 31, 2018 and December 31, 2017 . There was no change to the unrecognized tax benefits during the three months ended March 31, 2018 . CNX recognizes accrued interest related to uncertain tax positions in interest expense. As of March 31, 2018 and December 31, 2017 , the Company reported an accrued interest liability relating to uncertain tax positions of $728 and $644 , respectively, in Other Liabilities on the Consolidated Balance Sheets. The accrued interest liability includes $84 of accrued interest expense that is reflected in the Company's Consolidated Statements of Income for the three months ended March 31, 2018 . CNX recognizes penalties accrued related to uncertain tax positions in its income tax expense. As of March 31, 2018 and December 31, 2017 , CNX had no accrued liabilities for tax penalties related to uncertain tax positions. CNX and its subsidiaries file federal income tax returns with the United States and tax returns within various states and Canadian jurisdictions. With few exceptions, the Company is no longer subject to United States federal, state, local, or non-U.S. income tax examinations by tax authorities for the years before 2014. The Joint Committee on Taxation concluded its review of the audit of tax year 2015 on March 21, 2018. The audit resulted in a $108,651 reduction to CNX's net operating loss, primarily due to a reduction to the depreciation as an offset to the bonus depreciation taken in the 2010-2013 IRS audit. There was no cash impact from the audit.

Property, Plant and Equipment

Property, Plant and Equipment	3 Months Ended
	Mar. 31, 2018
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment	PROPERTY, PLANT AND EQUIPMENT: March 31, December 31, Property, Plant and Equipment Intangible drilling cost $ 3,902,099 $ 3,849,689 Proved gas properties 975,256 1,999,891 Gas gathering equipment 2,146,869 1,182,234 Unproved gas properties 929,875 919,733 Gas wells and related equipment 772,542 834,120 Surface land and other equipment 310,460 309,602 Other gas assets 66,250 221,226 Total Property, Plant and Equipment $ 9,103,351 $ 9,316,495 Less: Accumulated Depreciation, Depletion and Amortization 2,481,535 3,526,742 Total Property, Plant and Equipment - Net $ 6,621,816 $ 5,789,753 Property, Plant and Equipment Impairment In February 2017, the Company approved a plan to sell subsidiaries Knox Energy LLC and Coalfield Pipeline Company (collectively, Knox). Knox met all of the criteria to be classified as held for sale in February 2017. The potential disposal of Knox did not represent a strategic shift that would have a major effect on the Company's operations and financial results and was, therefore, not classified as discontinued operations in accordance with ASU 2014-08, Presentation of Financial Statements (Topic 205) and Property, Plant and Equipment (Topic 360). As part of the required evaluation under the held for sale guidance, the asset's book value was evaluated and adjusted to the lower of its carrying amount or fair value less cost to sell. The Company determined that the approximate fair value less costs to sell Knox was less than the carrying value of the net assets which resulted in an impairment of $137,865 in February 2017, included in Impairment of Exploration and Production Properties within the Consolidated Statements of Income. The sale of Knox closed in the second quarter of 2017. Industry Participation Agreements CNX is party to an industry participation agreement (referred to as a "joint venture" or "JV") that provided drilling and completion carries for the Company's retained interests. This joint development agreement is with Hess Ohio Developments, LLC (Hess) with respect to approximately 125 thousand net Utica Shale acres in Ohio in which each party has a 50% undivided interest. Under the agreement, as amended, Hess was obligated to pay a total of approximately $335,000 in the form of a 50% drilling carry of certain CNX working interest obligations as the acreage is developed. As of December 31, 2016, Hess' entire carry obligation has been satisfied.

Revolving Credit Facilities

Revolving Credit Facilities	3 Months Ended
	Mar. 31, 2018
Short-term Debt, Other Disclosures [Abstract]
Revolving Credit Facilities	REVOLVING CREDIT FACILITIES: CNX Resources Corporation (CNX) On March 8, 2018, CNX amended and restated its senior secured revolving credit facility, which expires on March 8, 2023. The credit facility increased lenders' commitments from $ 1,500,000 to $ 2,100,000 with an accordion feature that allows the Company to increase the commitments to $ 3,000,000 . The initial borrowing base increased from $ 2,000,000 to $ 2,500,000 , and the letters of credit aggregate sub-limit remained unchanged at $ 650,000 . The credit facility matures on March 8, 2023, provided that if the aggregate principal amount of our existing 5.875% Senior Notes due 2022, 8.00% Senior Notes due 2023 and certain other publicly traded debt securities outstanding 91 days prior to the earliest maturity of such debt (such date, the Springing Maturity Date) is greater than $500,000 , then the credit facility will mature on the Springing Maturity Date. The facility is secured by substantially all of the assets of CNX and certain of its subsidiaries. Fees and interest rate spreads are based on the percentage of facility utilization, measured quarterly. Availability under the facility is limited to a borrowing base, which is determined by the lenders' syndication agent and approved by the required number of lenders in good faith by calculating a value of CNX's proved natural gas reserves. The facility contains a number of affirmative and negative covenants that include, among others, covenants that, except in certain circumstances, limit the Company and the subsidiary guarantors' ability to create, incur, assume or suffer to exist indebtedness, create or permit to exist liens on properties, dispose of assets, make investments, purchase or redeem CNX common stock, pay dividends, merge with another corporation and amend the senior unsecured notes. The Company must also mortgage 80% of the value of its proved reserves and 80% of the value of its proved developed producing reserves, in each case, which are included in the borrowing base, maintain applicable deposit, securities and commodities accounts with the lenders or affiliates thereof, and enter into control agreements with respect to such applicable accounts. The facility also requires that CNX maintain a maximum net leverage ratio of no greater than 4.00 to 1.00, which is calculated as the ratio of debt less cash on hand to consolidated EBITDA, measured quarterly. CNX must also maintain a minimum current ratio of no less than 1.00 to 1.00, which is calculated as the ratio of current assets, plus revolver availability, to current liabilities, excluding borrowings under the revolver, measured quarterly. The calculation of all of the ratios exclude CNXM. CNX was in compliance of all financial covenants as of March 31, 2018 . At March 31, 2018 , the $2,100,000 facility had no borrowings outstanding and $ 253,167 of letters of credit outstanding, leaving $ 1,846,833 of unused capacity. At December 31, 2017 , the $1,500,000 facility had no borrowings outstanding and $ 239,072 of letters of credit outstanding, leaving $ 1,260,928 of unused capacity. CNX Midstream Partners LP (CNXM) On March 8, 2018, CNXM entered into a new $600,000 senior secured revolving credit facility that matures on March 8, 2023. The new revolving credit facility replaces their existing $250,000 senior secured revolving credit facility. The facility includes restrictions on the ability of CNXM, its subsidiary guarantors and certain of its non-guarantor, non-wholly-owned subsidiaries, except in certain circumstances, to: (i) create, incur, assume or suffer to exist indebtedness; (ii) create or permit to exist liens on their properties; (iii) prepay certain indebtedness unless there is no default or event of default under the facility; (iv) make or pay any dividends or distributions in excess of certain amounts; (v) merge with or into another person, liquidate or dissolve; or acquire all or substantially all of the assets of any going concern or going line of business or acquire all or a substantial portion of another person’s assets; (vi) make particular investments and loans; (vii) sell, transfer, convey, assign or dispose of its assets or properties other than in the ordinary course of business and other select instances; (viii) deal with any affiliate except in the ordinary course of business on terms no less favorable to CNXM than it would otherwise receive in an arm’s length transaction; (ix) amend in any material manner its certificate of incorporation, bylaws, or other organizational documents without giving prior notice to the lenders and, in some cases, obtaining the consent of the lenders. In addition, CNXM is obligated to maintain at the end of each fiscal quarter (x) a maximum total leverage ratio of no greater than between 4.75 to 1.00 ranging to no greater than 5.50 to 1.00 in certain circumstances; (y) a maximum secured leverage ratio of no greater than 3.50 to 1.00 and (z) a minimum interest coverage ratio of no less than 2.50 to 1.00. CNXM was in compliance of all financial covenants as of March 31, 2018 . The facility also contains customary events of default, including, but not limited to, a cross-default to certain other debt, breaches of representations and warranties, change of control events and breaches of covenants. The obligations under the facility are secured by substantially all of the assets of CNXM and its wholly-owned subsidiaries. CNX is not a guarantor under the facility. At March 31, 2018, the $600,000 facility had $20,000 of borrowings outstanding.

Long-Term Debt

Long-Term Debt	3 Months Ended
	Mar. 31, 2018
Long-term Debt, Other Disclosures [Abstract]
Long-term Debt	LONG-TERM DEBT: March 31, December 31, Debt: Senior Notes due April 2022 at 5.875% (Principal of $1,314,307 and $1,705,682 $ 1,316,880 $ 1,709,226 Senior Notes due April 2023 at 8.00% (Principal of $500,000 less Unamortized Discount of $4,525 and $4,751, respectively) 495,475 495,249 CNX Midstream Partners LP Senior Notes due March 2026 at 6.50% (Principal of $400,000 less Unamortized Discount of $5,938 at March 31, 2018) 394,062 — CNX Midstream Partners LP Revolving Credit Facility 20,000 — Other Note Maturing in 2018 (Principal of $358 less Unamortized Discount of $8 at December 31, 2017) — 350 Less: Unamortized Debt Issuance Costs 15,252 17,536 2,211,165 2,187,289 Less: Amounts Due in One Year* — 263 Long-Term Debt $ 2,211,165 $ 2,187,026 * Excludes current portion of Capital Lease Obligations of $6,891 and $ 6,848 at March 31, 2018 and December 31, 2017 , respectively. During the three months ended March 31, 2018 , CNXM completed a private offering of $ 400,000 of 6.50% senior notes due in March 2026 less $ 6,000 of unamortized bond discount. In addition, CNXM entered into a $ 600,000 senior secured revolving credit facility that matures on March 8, 2023 (See Note 10 - Revolving Credit Facilities). The new revolving credit facility replaces their existing $250,000 senior secured revolving credit facility. CNXM had $20,000 of outstanding borrowings at March 31, 2018 . CNX is not a guarantor of CNXM's 6.50% senior notes due in March 2026 or CNXM's senior secured revolving credit facility. During the three months ended March 31, 2018 , CNX purchased $391,375 of its outstanding 5.875% senior notes due in April 2022. As part of this transaction, a loss of $ 15,635 was included in Loss (Gain) on Debt Extinguishment on the Consolidated Statements of Income. During the three months ended March 31, 2017 , CNX purchased $99,956 of its outstanding 5.875% senior notes due in April 2022. As part of this transaction, a gain of $822 was included in Loss (Gain) on Debt Extinguishment on the Consolidated Statements of Income.

Commitments and Contingent Liab

Commitments and Contingent Liabilities	3 Months Ended
	Mar. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingent Liabilities	COMMITMENTS AND CONTINGENT LIABILITIES: CNX and its subsidiaries are subject to various lawsuits and claims with respect to such matters as personal injury, wrongful death, damage to property, exposure to hazardous substances, governmental regulations including environmental remediation, employment and contract disputes and other claims and actions arising out of the normal course of business. CNX accrues the estimated loss for these lawsuits and claims when the loss is probable and can be estimated. The Company's current estimated accruals related to these pending claims, individually and in the aggregate, are immaterial to the financial position, results of operations or cash flows of CNX. It is possible that the aggregate loss in the future with respect to these lawsuits and claims could ultimately be material to the financial position, results of operations or cash flows of CNX; however, such amounts cannot be reasonably estimated. The amount claimed against CNX is disclosed below when an amount is expressly stated in the lawsuit or claim, which is not often the case. The following lawsuits and claims include those for which a loss is probable and an accrual has been recognized: Hale Litigation: This class action lawsuit was filed on September 23, 2010 in the U.S. District Court in Abingdon, Virginia. The putative class consists of force-pooled unleased gas owners whose ownership of the coalbed methane (CBM) gas was declared to be in conflict with rights of others. The lawsuit seeks a judicial declaration of ownership of the CBM and damages based on allegations CNX Gas failed to either pay royalties due to conflicting claimants or deemed lessors or paid them less than required because of the alleged practice of improper below market sales and/or taking alleged improper post-production deductions. On September 30, 2013, the District Judge entered an Order certifying the class, and CNX Gas appealed the Order to the U.S. Fourth Circuit Court of Appeals. On August 19, 2014, the Fourth Circuit agreed with CNX Gas, reversed the Order certifying the class and remanded the case to the trial court for further proceedings consistent with the decision. On April 23, 2015, Plaintiffs filed a Renewed Motion for Class Certification, which CNX opposed. On March 29, 2017, the Court issued an Order certifying four issues for class treatment: (1) allegedly excessive deductions; (2) royalties based on purported improperly low prices; (3) deduction of severance taxes; and (4) Plaintiffs' request for an accounting. On April 13, 2017, CNX filed a Petition for Allowance of Appeal with the Fourth Circuit, and on May 22, 2017 the Petition was denied. CNX and plaintiffs’ counsel have reached an agreement in principal to settle the certified class claims. On March 20, 2018, the Court preliminarily approved the class settlement, and on August 23, 2018, the Court will conduct a hearing to consider final approval of the proposed Settlement Agreement and Class Counsel’s request for attorneys’ fees. The Company has established an accrual to cover its estimated liability for this case. This accrual is immaterial to the overall financial position of CNX and is included in Other Accrued Liabilities on the Consolidated Balance Sheets. Addison Litigation: This class action lawsuit was filed on April 28, 2010 in the U.S. District Court in Abingdon, Virginia. The putative class consists of gas lessors whose gas ownership is in conflict. The lawsuit seeks a judicial declaration of ownership of the CBM and damages based on the allegations that CNX Gas failed to either pay royalties due to these conflicting claimant lessors or paid them less than required because of the alleged practice of improper below market sales and/or taking alleged improper post-production deductions. On September 30, 2013, the District Judge entered an Order certifying the class, and CNX Gas appealed the Order to the U.S. Fourth Circuit Court of Appeals. On August 19, 2014, the Fourth Circuit agreed with CNX Gas, reversed the Order certifying the class and remanded the case to the trial court for further proceedings consistent with the decision. On April 23, 2015, Plaintiffs filed a Renewed Motion for Class Certification, which CNX opposed. On March 29, 2017, the Court issued an Order denying class certification in this matter. CNX and plaintiff’s counsel reached an agreement to settle this lawsuit, and filed with the Court a joint a Stipulation of Dismissal with prejudice on March 6, 2018. The Company has established an accrual to cover its estimated liability for this case. This accrual is immaterial to the overall financial position of CNX and is included in Other Accrued Liabilities on the Consolidated Balance Sheets. At March 31, 2018 , CNX has provided the following financial guarantees, unconditional purchase obligations and letters of credit to certain third parties as described by major category in the following table. These amounts represent the maximum potential of total future payments that the Company could be required to make under these instruments. These amounts have not been reduced for potential recoveries under recourse or collateralization provisions. Generally, recoveries under reclamation bonds would be limited to the extent of the work performed at the time of the default. No amounts related to these unconditional purchase obligations and letters of credit are recorded as liabilities in the financial statements. CNX management believes that these commitments will expire without being funded, and therefore will not have a material adverse effect on financial condition. Amount of Commitment Expiration Per Period Total Amounts Committed Less Than 1 Year 1-3 Years 3-5 Years Beyond 5 Years Letters of Credit: Firm Transportation $ 252,882 $ 252,882 $ — $ — $ — Other 285 285 — — — Total Letters of Credit 253,167 253,167 — — — Surety Bonds: Employee-Related 1,850 1,850 — — — Environmental 5,438 3,513 1,925 — — Other 12,498 11,988 510 — — Total Surety Bonds 19,786 17,351 2,435 — — Total Commitments $ 272,953 $ 270,518 $ 2,435 $ — $ — Excluded from the above table are commitments and guarantees, that relate to discontinued operations, entered into in conjunction with the spin-off of the Company's coal business (See Note 5 - Discontinued Operations). Although CONSOL Energy has agreed to indemnify us to the extent that we are called upon to pay any of these liabilities, there is no assurance that CONSOL Energy will satisfy its obligations to indemnify us in these situations. CNX uses various leased facilities and equipment in its operations. Future minimum lease payments under operating leases at March 31, 2018 are as follows: Operating Lease Obligations Due Amount Less than 1 year $ 10,034 1 - 3 years 14,057 3 - 5 years 10,790 More than 5 years 39,667 Total Operating Lease Obligations $ 74,548 CNX enters into long-term unconditional purchase obligations to procure major equipment purchases, natural gas firm transportation, gas drilling services and other operating goods and services. These purchase obligations are not recorded on the Consolidated Balance Sheets. As of March 31, 2018 , the purchase obligations for each of the next five years and beyond were as follows: Obligations Due Amount Less than 1 year $ 174,312 1 - 3 years 280,301 3 - 5 years 251,768 More than 5 years 593,715 Total Purchase Obligations $ 1,300,096

Derivative Instruments

Derivative Instruments	3 Months Ended
	Mar. 31, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments	DERIVATIVE INSTRUMENTS: CNX enters into financial derivative instruments to manage its exposure to commodity price volatility. These natural gas and NGL commodity hedges are accounted for on a mark-to-market basis with changes in fair value recorded in current period earnings. CNX is exposed to credit risk in the event of non-performance by counterparties. The creditworthiness of counterparties is subject to continuing review. The Company has not experienced any issues of non-performance by derivative counterparties. None of the Company's counterparty master agreements currently require CNX to post collateral for any of its positions. However, as stated in the counterparty master agreements, if CNX's obligations with one of its counterparties cease to be secured on the same basis as similar obligations with the other lenders under the credit facility, CNX would have to post collateral for instruments in a liability position in excess of defined thresholds. All of the Company's derivative instruments are subject to master netting arrangements with our counterparties. CNX recognizes all financial derivative instruments as either assets or liabilities at fair value on the Consolidated Balance Sheets on a gross basis. Each of the Company's counterparty master agreements allows, in the event of default, the ability to elect early termination of outstanding contracts. If early termination is elected, CNX and the applicable counterparty would net settle all open hedge positions. The total notional amounts of production of CNX's derivative instruments at March 31, 2018 and December 31, 2017 were as follows: March 31, December 31, Forecasted to 2018 2017 Settle Through Natural Gas Commodity Swaps (Bcf) 1,143.5 1,067.2 2022 Natural Gas Basis Swaps (Bcf) 766.9 688.1 2022 The gross fair value of CNX's derivative instruments at March 31, 2018 and December 31, 2017 was as follows: Asset Derivative Instruments Liability Derivative Instruments March 31, December 31, March 31, December 31, 2018 2017 2018 2017 Commodity Swaps: Prepaid Expense $ 46,668 $ 62,369 Other Accrued Liabilities $ 20,908 $ 5,985 Other Assets 80,655 59,281 Other Liabilities 30,369 42,419 Total Asset $ 127,323 $ 121,650 Total Liability $ 51,277 $ 48,404 Basis Only Swaps: Prepaid Expense $ 25,922 $ 14,965 Other Accrued Liabilities $ 17,864 $ 35,306 Other Assets 43,481 24,223 Other Liabilities 15,557 17,179 Total Asset $ 69,403 $ 39,188 Total Liability $ 33,421 $ 52,485 The effect of derivative instruments on the Company's Consolidated Statements of Income was as follows: For the Three Months Ended March 31, 2018 2017 Cash Paid in Settlement of Commodity Derivative Instruments: Commodity Swaps: Natural Gas $ (434 ) $ (24,607 ) Propane — (1,216 ) Natural Gas Basis Swaps (16,557 ) (21,280 ) Total Cash Paid in Settlement of Commodity Derivative Instruments (16,991 ) (47,103 ) Unrealized Gain (Loss) on Commodity Derivative Instruments: Commodity Swaps: Natural Gas 2,800 162,604 Propane — 1,147 Natural Gas Basis Swaps 49,278 (139,111 ) Total Unrealized Gain on Commodity Derivative Instruments 52,078 24,640 Gain (Loss) on Commodity Derivative Instruments: Commodity Swaps: Natural Gas 2,366 137,997 Propane — (69 ) Natural Gas Basis Swaps 32,721 (160,391 ) Total Gain (Loss) on Commodity Derivative Instruments $ 35,087 $ (22,463 ) The Company also enters into fixed price natural gas sales agreements that are satisfied by physical delivery. These physical commodity contracts qualify for the normal purchases and sales exception and are not subject to derivative instrument accounting.

Fair Value of Financial Instrum

Fair Value of Financial Instruments	3 Months Ended
	Mar. 31, 2018
Fair Value Disclosures [Abstract]
Fair Value of Financial Instruments	FAIR VALUE OF FINANCIAL INSTRUMENTS: CNX determines the fair value of assets and liabilities based on the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants. The fair values are based on assumptions that market participants would use when pricing an asset or liability, including assumptions about risk and the risks inherent in valuation techniques and the inputs to valuations. The fair value hierarchy is based on whether the inputs to valuation techniques are observable or unobservable. Observable inputs reflect market data obtained from independent sources (including NYMEX forward curves, LIBOR-based discount rates and basis forward curves), while unobservable inputs reflect the Company's own assumptions of what market participants would use. The fair value hierarchy includes three levels of inputs that may be used to measure fair value as described below: Level One - Quoted prices for identical instruments in active markets. Level Two - The fair value of the assets and liabilities included in Level 2 are based on standard industry income approach models that use significant observable inputs, including NYMEX forward curves, LIBOR-based discount rates and basis forward curves. Level Three - Unobservable inputs significant to the fair value measurement supported by little or no market activity. In those cases when the inputs used to measure fair value meet the definition of more than one level of the fair value hierarchy, the lowest level input that is significant to the fair value measurement in its totality determines the applicable level in the fair value hierarchy. The financial instruments measured at fair value on a recurring basis are summarized below: Fair Value Measurements at March 31, 2018 Fair Value Measurements at December 31, 2017 Description (Level 1) (Level 2) (Level 3) (Level 1) (Level 2) (Level 3) Gas Derivatives $ — $ 112,028 $ — $ — $ 59,949 $ — Put Option $ — $ — $ — $ — $ (3,500 ) $ — The following methods and assumptions were used to estimate the fair value for which the fair value option was not elected: Cash and cash equivalents: The carrying amount reported in the Consolidated Balance Sheets for cash and cash equivalents approximates its fair value due to the short-term maturity of these instruments. Long-term debt: The fair value of long-term debt is measured using unadjusted quoted market prices or estimated using discounted cash flow analyses. The discounted cash flow analyses are based on current market rates for instruments with similar cash flows. The carrying amounts and fair values of financial instruments for which the fair value option was not elected are as follows: March 31, 2018 December 31, 2017 Carrying Amount Fair Value Carrying Amount Fair Value Cash and Cash Equivalents $ 82,490 $ 82,490 $ 509,167 $ 509,167 Long-Term Debt $ 2,226,417 $ 2,264,496 $ 2,204,825 $ 2,281,282 Cash and cash equivalents represent highly- liquid instruments and constitute Level 1 fair value measurements. Certain of the Company’s debt is actively traded on a public market and, as a result, constitute Level 1 fair value measurements. The portion of the Company’s debt obligations that is not actively traded is valued through reference to the applicable underlying benchmark rate and, as a result, constitute Level 2 fair value measurements.

Variable Interest Entities (Not

Variable Interest Entities (Notes)	3 Months Ended
	Mar. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Variable Interest Entities	VARIABLE INTEREST ENTITIES: The Company determined CNXM, of which the company owns approximately 34% of, to be a variable interest entity. Upon completion of the Midstream acquisition (see Note 6) through the Company's ownership and control of CNXM's general partner (CNX Midstream GP LLC), the Company has the power to direct the activities that most significantly impact CNXM's economic performance. In addition, through its limited partner interest and incentive distribution rights, or IDRs in CNXM, the Company has the obligation to absorb the losses of CNXM and the right to receive benefits in accordance with such interests. As the Company has a controlling financial interest and is the primary beneficiary of CNXM, the Company consolidates CNXM commencing on January 3, 2018. The risks associated with the operations of CNXM are discussed in its Annual Reports on Form 10-K for the year ended December 31, 2017. The following table presents amounts included in the Company's Consolidated Balance Sheet that were for the use or obligation of CNXM as of March 31, 2018 : March 31, 2018 Assets: Cash $ 1,966 Receivables - Related Party 13,411 Receivables - Third Party 9,645 Other Current Assets 3,242 Property, Plant and Equipment, net 899,558 Other Assets 4,294 Liabilities: Accounts Payable $ 23,363 Accounts Payable - Related Party 3,056 Revolving Credit Facility 20,000 Long-Term Debt 392,647 The following table summarizes CNXM's Consolidated Statements of Operations and Cash Flows for the three months ended March 31, 2018 , inclusive of affiliate amounts: For the Three Months Ended March 31, 2018 Revenue Gathering Revenue - Related Party $ 37,730 Gathering Revenue - Third Party 26,139 Total Revenue 63,869 Expenses Operating Expense - Related Party 4,435 Operating Expense - Third Party 8,468 General and Administrative Expense - Related Party 3,612 General and Administrative Expense - Third Party 2,549 Loss on Asset Sales 2,755 Depreciation Expense 5,856 Interest Expense 2,489 Total Expense 30,164 Net Income $ 33,705 Net Cash Provided by Operating Activities $ 41,867 Net Cash Used in Investing Activities $ (10,156 ) Net Cash Used in Financing Activities $ (32,939 ) In March 2018, CNXM closed its previously announced acquisition of CNX's remaining 95% interest in the gathering system and related assets commonly referred to as the Shirley-Penns System, in exchange for cash consideration in the amount of $265,000 . CNXM funded the cash consideration with proceeds from the issuance of 6.5% senior notes due 2026 (See Note 11 - Long-Term Debt). Prior to the acquisition of Noble's interest on January 3, 2018, CNX accounted for its interests in CNX Gathering and CNXM as an equity-method investment. The following is a summary of the Company's Investment in Affiliates balances included within the Consolidated Balance Sheets associated with CNX Gathering and CNXM, respectively: CNX Gathering CNXM Total Balance at December 31, 2016 $ 151,075 $ 18,133 $ 169,208 Equity in Earnings 9,823 38,523 48,346 Distributions (17,254 ) (24,929 ) (42,183 ) Asset Transfer (2,527 ) 2,527 — Balance at December 31, 2017 $ 141,117 $ 34,254 $ 175,371 The following transactions were included in Other Operating Income and Transportation, Gathering and Compression within the Consolidated Statements of Income: For the Three Months Ended March 31, 2017 Other Operating Income: Equity in Earnings of Affiliates - CNX Gathering $ 1,866 Equity in Earnings of Affiliates - CNXM $ 10,072 Transportation, Gathering and Compression: Gathering Services - CNX Gathering $ 253 Gathering Services - CNXM $ 34,054 At December 31, 2017 , CNX had a net payable of $ 9,982 , due to both CNX Gathering and CNXM primarily for accrued but unpaid gathering services.

Segment Information

Segment Information	3 Months Ended
	Mar. 31, 2018
Segment Reporting [Abstract]
Segment Information	SEGMENT INFORMATION: CNX consists of two principal business divisions: Exploration and Production (E&P) and Midstream. The principal activity of the E&P division, which includes four reportable segments, is to produce pipeline quality natural gas for sale primarily to gas wholesalers. The E&P Division's reportable segments are Marcellus Shale, Utica Shale, Coalbed Methane, and Other Gas. The Other Gas segment is primarily related to shallow oil and gas production which is not significant to the Company. It also includes the Company's purchased gas activities, unrealized gain or loss on commodity derivative instruments, exploration and production related other costs, impairment of exploration and production properties, as well as various other operating activities assigned to the E&P Division but not allocated to each individual segment. CNX's Midstream division is the result of CNX's acquisition of NBL Midstream, LLC's interest in CNX Gathering LLC (See Note 6 - Acquisitions and Dispositions). As part of the acquisition, CNX now has a controlling financial interest and is the primary beneficiary of CNXM, of which the company owns approximately 34% of, which is a publicly traded master limited partnership (See Note 15 - Variable Interest Entity for more information). The principal activity of the Midstream division is the ownership, operation, development and acquisition of natural gas gathering and other midstream energy assets in order to provide natural gas gathering services for the Company's produced gas, as well as for other independent third parties in the Marcellus Shale and Utica Shale in Pennsylvania and West Virginia. Prior to the acquisition, the Company accounted for its 50% interest in CNX Gathering LLC as an equity method investment. The Company's unallocated expenses include other expense, gain on asset sales related to non-core assets, gain on previously held equity interest, loss on debt extinguishment and income taxes. Prior to the spin-off of the coal company in November 2017 (See Note 5 - Discontinued Operations), CNX had a Coal division. The Coal division had three reportable segments; PA Operations, Virginia (VA) Operations and Other Coal. The VA Operations segment included the Buchanan Mine and the Other Coal segment was primarily comprised of the assets and operations of the Miller Creek and Fola Complexes, as well as coal terminal operations, closed and idle mine activities, selling, general and administrative activities and various other non-operated activities. In the preparation of the following information, intersegment sales have been recorded at amounts approximating market. Operating profit for each segment is based on sales less identifiable operating and non-operating expenses. Assets are reflected at the division level for E&P and are not allocated between each individual E&P segment. These assets are not allocated to each individual segment due to the diverse asset base controlled by CNX, whereby each individual asset may service more than one segment within the division. An allocation of such asset base would not be meaningful or representative on a segment by segment basis.

Related Party Transaction

Related Party Transaction	3 Months Ended
	Mar. 31, 2018
Related Party Transactions [Abstract]
Related Party Transactions	RELATED PARTY TRANSACTIONS: CONSOL Energy Inc. In connection with the spin-off of its coal business, as discussed in Note 5 - Discontinued Operations, CNX and CONSOL Energy entered into several agreements that govern the relationship of the parties following the Distribution, including the following: • Separation and Distribution Agreement; • Transition Services Agreement; • Tax Matters Agreement; • Employee Matters Agreement; • Intellectual Property Matters Agreement; • CNX Resources Corporation to CONSOL Energy Inc. Trademark License Agreement; • CONSOL Energy Inc. to CNX Resources Corporation Trademark License Agreement; and • First Amendment to Amended and Restated Omnibus Agreement ("Omnibus Amendment"). As of March 31, 2018 and December 31, 2017 , CNX had a receivable from CONSOL Energy of $1,007 and $12,540 , respectively, recorded in Total Current Assets on the Consolidated Balance Sheets. At March 31, 2018 , CNX also had recorded obligations to CONSOL Energy of $11,133 , of which $4,845 was included in Total Current Liabilities and $6,288 was included in Total Deferred Credits and Other Liabilities on the Consolidated Balance Sheets. At December 31, 2017 , CNX had recorded obligations to CONSOL Energy of $15,415 , of which $4,500 was included in Total Current Liabilities and $10,915 was included in Total Deferred Credits and Other Liabilities on the Consolidated Balance Sheets. These items relate to reimbursement of the one-time transaction costs as well as other reimbursements per the terms of the Separation and Distribution Agreement. All significant intercompany transactions between CNX and CONSOL Energy have been included in the Consolidated Financial Statements and are considered to have been effectively settled for cash at the time the transaction was recorded. In the Consolidated Statement of Stockholders' Equity, the distribution of CONSOL Energy Inc. is the net of the variety of intercompany transactions including, but not limited to, collection of trade receivables, payment of trade payables and accrued liabilities, settlement of charges for allocated selling, general and administrative costs and payment of taxes by CNX on CONSOL Energy's behalf.

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets	3 Months Ended
	Mar. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangible Assets	GOODWILL AND OTHER INTANGIBLE ASSETS: Goodwill and other indefinite-lived intangible assets are not amortized, but are evaluated for impairment annually during the fourth quarter, or more frequently if an event occurs or circumstances change that would more likely than not reduce the fair value of its carrying value. The Company may first consider qualitative factors to assess whether there are indicators that it is more likely than not that the fair value of a reporting unit may not exceed its carrying amount. To the extent that such indicators exist, a goodwill impairment test is completed. If the carrying value of the goodwill of a reporting unit exceeds its implied fair value, the difference is recognized as an impairment charge. The Company uses a combination of an income and market approach to estimate the fair value of a reporting unit. As a result of the acquisition of Noble’s 50% membership interest in CONE Gathering LLC, on January 3, 2018, CNX recorded $796,359 of goodwill and $128,781 of other intangible assets in conjunction with the preliminary purchase accounting. See Note 6 - Acquisitions and Dispositions for more information. All goodwill is attributed to the Midstream reportable segment. Changes in the carrying amount of goodwill consist of the following activity: December 31, 2017 $ — Acquisitions 796,359 March 31, 2018 $ 796,359 The carrying amount and accumulated amortization of other intangible assets consist of the following: March 31, 2018 December 31, 2017 Other Intangible Assets Customer Relationships $ 128,781 $ — Less: accumulated amortization for customer relationships (1,922 ) — Total other intangible assets, net $ 126,859 $ — Amortization expense for other intangible assets was $1,922 for the three months ended March 31, 2018. There was no amortization expense for the three months ended March 31, 2017. The customer relationships intangible asset category will be amortized on a straight line basis over approximately 17 years. The estimated future annual amortization expense for the next five fiscal years for other intangible assets recorded at March 31, 2018 is as follows: 2019 2020 2021 2022 2023 Estimated annual amortization expense $ 7,688 $ 7,688 $ 7,688 $ 7,688 $ 7,688

Stock Repurchase

Stock Repurchase	3 Months Ended
	Mar. 31, 2018
Stock Repurchase [Abstract]
Stock Repurchase	STOCK REPURCHASE: In September 2017, CNX's Board of Directors approved a one-year stock repurchase program of up to $200,000 . On October 30, 2017, the Board approved an increase to the aggregate amount of the repurchase plan to $450,000 . The repurchases may be effected from time-to-time through open market purchases, privately negotiated transactions, Rule 10b5-1 plans, accelerated stock repurchases, block trades, derivative contracts or otherwise in compliance with Rule 10b-18. The timing of any repurchases will be based on a number of factors, including available liquidity, the Company's stock price, the Company's financial outlook, and alternative investment options. The share repurchase program does not obligate the Company to repurchase any dollar amount or number of shares and the Board may modify, suspend, or discontinue its authorization of the program at any time. The Board of Directors will continue to evaluate the size of the stock repurchase program based on CNX's free cash flow position, leverage ratio, and capital plans. During three months ended March 31, 2018 , 5,785,900 shares were repurchased and retired at an average price of $ 14.49 per share for a total cost of $83,963 .

Recent Accounting Pronouncement

Recent Accounting Pronouncements	3 Months Ended
	Mar. 31, 2018
Accounting Changes and Error Corrections [Abstract]
Recent Accounting Pronouncements	RECENT ACCOUNTING PRONOUNCEMENTS: In February 2018, the FASB issued Update 2018-02 - Income Statement - Reporting Comprehensive Income (Topic 220), which allows a reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from the Tax Cuts and Jobs Act (the "Act"). Consequently, the amendments eliminate the stranded tax effects resulting from the Act and will improve the usefulness of information reported to financial statement users. However, because the amendments only relate to the reclassification of the income tax effects of the Act, the underlying guidance that requires that the effect of a change in tax laws or rates be included in income from continuing operations is not affected. This Update also requires certain disclosures about stranded tax effects. The amendments in this Update are effective for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years. Early adoption is permitted and the amendments should be applied either in the period of adoption or retrospectively to each period (or periods) in which the effect of the change in the U.S. federal corporate income tax rate in the Act is recognized. The Company is currently evaluating the impact this guidance may have on CNX's financial statements. In January 2017, the FASB issued Update 2017-04 - Simplifying the Test of Goodwill Impairment. This Update simplifies the quantitative goodwill impairment test requirements by eliminating the requirement to calculate the implied fair value of goodwill (Step 2 of the current goodwill impairment test). Instead a company would record an impairment charge based on the excess of a reporting unit's carrying value over its fair value (measured in Step 1 of the current goodwill impairment test). This Update is effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years, and early adoption is permitted. Entities will apply the standard's provisions prospectively. The Company adopted Update 2017-04 on January 1, 2018 and determined that this standard will not have a material quantitative effect on the financial statements, unless an impairment charge was necessary. In February 2016, the FASB issued Update 2016-02 - Leases (Topic 842), which increases transparency and comparability among organizations by recognizing lease assets and lease liabilities on the balance sheet and disclosing key information about leasing arrangements. Update 2016-02 does retain a distinction between finance leases and operating leases, which is substantially similar to the classification criteria for distinguishing between capital leases and operating leases in the previous lease guidance. Retaining this distinction allows the recognition, measurement and presentation of expenses and cash flows arising from a lease to not significantly change from previous GAAP. For leases with a term of 12 months or less, a lessee is permitted to make an accounting policy election by class of underlying asset not to recognize lease assets and lease liabilities, but to recognize lease expense on a straight-line basis over the lease term. For both financing and operating leases, the right-to-use asset and lease liability will be initially measured at the present value of the lease payments in the statement of financial position. The accounting applied by a lessor is largely unchanged from that applied under previous GAAP. For public business entities, the amendments in this Update are effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Early application is permitted. In transition, lessees and lessors are required to recognize and measure leases at the beginning of the earliest period presented using a modified retrospective approach. CNX is currently reviewing all existing leases and agreements that are covered by this standard and is evaluating the impact on the financial statements and related disclosures.

Subsequent Events

Subsequent Events	3 Months Ended
	Mar. 31, 2018
Subsequent Events [Abstract]
Subsequent Events	SUBSEQUENT EVENTS: On April 30, 2018, CNX's board of directors approved and on May 2, 2018 CNX closed on an Asset Exchange Agreement, (the “AEA”), with HG Energy II Appalachia, LLC (“HG Energy”), pursuant to which, among other things, HG Energy (i) paid to CNX approximately $7,000 in cash proceeds and (ii) contributed to CNX certain undeveloped Marcellus and Utica acreage in Southwest Pennsylvania. In exchange for the foregoing, CNX (x) assigned its indirectly held 95% interest in certain non-core midstream assets and surface acreage and (y) released its indirectly held interest in certain dedicated acreage. In connection with the transactions contemplated by the AEA, CNX also agreed to certain transactions with CNXM, including the amendment of the existing gas gathering agreement between CNX and CNXM to include a forty -well minimum commitment with CNXM. The AEA could have an impact on the future cash flows that were used in determining the fair value of certain of CNX’s customer relationship intangible assets that were acquired in connection with the Midstream acquisition (see Note 6 - Acquisition and Dispositions and Note 19 - Goodwill and Other Intangible Assets). If CNX determines that the carrying value of the other intangible asset exceeds its fair value, the difference will be recognized as an impairment charge during the second quarter.

Recent Accounting Pronounceme32

Recent Accounting Pronouncements (Policies)	3 Months Ended
	Mar. 31, 2018
Accounting Changes and Error Corrections [Abstract]
Recent Accounting Pronouncements	In February 2018, the FASB issued Update 2018-02 - Income Statement - Reporting Comprehensive Income (Topic 220), which allows a reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from the Tax Cuts and Jobs Act (the "Act"). Consequently, the amendments eliminate the stranded tax effects resulting from the Act and will improve the usefulness of information reported to financial statement users. However, because the amendments only relate to the reclassification of the income tax effects of the Act, the underlying guidance that requires that the effect of a change in tax laws or rates be included in income from continuing operations is not affected. This Update also requires certain disclosures about stranded tax effects. The amendments in this Update are effective for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years. Early adoption is permitted and the amendments should be applied either in the period of adoption or retrospectively to each period (or periods) in which the effect of the change in the U.S. federal corporate income tax rate in the Act is recognized. The Company is currently evaluating the impact this guidance may have on CNX's financial statements. In January 2017, the FASB issued Update 2017-04 - Simplifying the Test of Goodwill Impairment. This Update simplifies the quantitative goodwill impairment test requirements by eliminating the requirement to calculate the implied fair value of goodwill (Step 2 of the current goodwill impairment test). Instead a company would record an impairment charge based on the excess of a reporting unit's carrying value over its fair value (measured in Step 1 of the current goodwill impairment test). This Update is effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years, and early adoption is permitted. Entities will apply the standard's provisions prospectively. The Company adopted Update 2017-04 on January 1, 2018 and determined that this standard will not have a material quantitative effect on the financial statements, unless an impairment charge was necessary. In February 2016, the FASB issued Update 2016-02 - Leases (Topic 842), which increases transparency and comparability among organizations by recognizing lease assets and lease liabilities on the balance sheet and disclosing key information about leasing arrangements. Update 2016-02 does retain a distinction between finance leases and operating leases, which is substantially similar to the classification criteria for distinguishing between capital leases and operating leases in the previous lease guidance. Retaining this distinction allows the recognition, measurement and presentation of expenses and cash flows arising from a lease to not significantly change from previous GAAP. For leases with a term of 12 months or less, a lessee is permitted to make an accounting policy election by class of underlying asset not to recognize lease assets and lease liabilities, but to recognize lease expense on a straight-line basis over the lease term. For both financing and operating leases, the right-to-use asset and lease liability will be initially measured at the present value of the lease payments in the statement of financial position. The accounting applied by a lessor is largely unchanged from that applied under previous GAAP. For public business entities, the amendments in this Update are effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Early application is permitted. In transition, lessees and lessors are required to recognize and measure leases at the beginning of the earliest period presented using a modified retrospective approach. CNX is currently reviewing all existing leases and agreements that are covered by this standard and is evaluating the impact on the financial statements and related disclosures.

Earnings Per Share (Tables)

Earnings Per Share (Tables)	3 Months Ended
	Mar. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share	The table below sets forth the share-based awards that have been excluded from the computation of diluted earnings per share because their effect would be antidilutive: For the Three Months Ended March 31, 2018 2017 Antidilutive Options 2,293,506 5,472,165 Antidilutive Restricted Stock Units 11,480 951,320 Antidilutive Performance Share Units 312,296 1,762,690 Antidilutive Performance Stock Options 927,268 802,804 3,544,550 8,988,979
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity	The table below sets forth the share-based awards that have been exercised or released: For the Three Months Ended March 31, 2018 2017 Options 153,718 61,624 Restricted Stock Units 171,137 334,040 Performance Share Units 357,596 560,936 682,451 956,600
Schedule of Earnings Per Share, Basic and Diluted	The computations for basic and dilutive earnings per share are as follows: For the Three Months Ended March 31, 2018 2017 Income (Loss) from Continuing Operations $ 545,546 $ (91,007 ) Less: Net Income Attributable to Non-Controlling Interest 17,983 — Net Income (Loss) from Continuing Operations Attributable to CNX Resources Shareholders $ 527,563 $ (91,007 ) Income from Discontinued Operations — 52,041 Net Income (Loss) Attributable to CNX Resources Shareholders $ 527,563 $ (38,966 ) Weighted-average shares of common stock outstanding 221,930,165 229,817,169 Effect of dilutive shares 2,252,371 — Weighted-average diluted shares of common stock outstanding 224,182,536 229,817,169 Earnings (Loss) per Share: Basic (Continuing Operations) $ 2.38 $ (0.40 ) Basic (Discontinued Operations) — 0.23 Total Basic $ 2.38 $ (0.17 ) Dilutive (Continuing Operations) $ 2.35 $ (0.40 ) Dilutive (Discontinued Operations) — 0.23 Total Dilutive $ 2.35 $ (0.17 )

Changes in Accumulated Other 34

Changes in Accumulated Other Comprehensive Loss (Tables)	3 Months Ended
	Mar. 31, 2018
Equity [Abstract]
Schedule of Changes in Accumulated Other Comprehensive Income/(Loss) by Component	Changes in Accumulated Other Comprehensive Loss by component, net of tax, were as follows: Long-Term Liabilities Balance at December 31, 2017 $ (8,476 ) Amounts Reclassified from Accumulated Other Comprehensive Loss, net of tax 170 Balance at March 31, 2018 $ (8,306 )
Schedule of Reclassification of Adjustments to Accumulated Other Comprehensive Income	The following table shows the reclassification of adjustments out of Accumulated Other Comprehensive Loss: For the Three Months Ended March 31, 2018 2017 Actuarially Determined Long-Term Liability Adjustments Amortization of Prior Service Costs $ (90 ) $ (749 ) Recognized Net Actuarial Loss 354 6,303 Total 264 5,554 Less: Tax Benefit 94 2,052 Net of Tax $ 170 $ 3,502

Revenue from Contract with Cuso

Revenue from Contract with Cusomter (Tables)	3 Months Ended
	Mar. 31, 2018
Revenue from Contract with Customer [Abstract]
Disaggregation of Revenue	The following table is a disaggregation of our revenue by major sources: For the Three Months Ended March 31, 2018 2017 Revenue from Contracts with Customers Natural Gas Revenue $ 347,348 $ 273,546 NGLs Revenue 50,884 39,283 Condensate Revenue 6,503 4,305 Oil Revenue 888 629 Total Natural Gas, NGLs and Oil Revenue 405,623 317,763 Purchased Gas Revenue 18,055 8,979 Midstream Revenue 26,254 — Other Sources of Revenue and Other Operating Income Gain (Loss) on Commodity Derivative Instruments 35,087 (22,463 ) Other Operating Income 10,710 15,650 Total Revenue and Other Operating Income $ 495,729 $ 319,929

Discontinued Operations (Tables

Discontinued Operations (Tables)	3 Months Ended
	Mar. 31, 2018
Discontinued Operations and Disposal Groups [Abstract]
Disposal Groups, Including Discontinued Operations	The following table details selected financial information for the divested business included within discontinued operations: For the Three Months Ended March 31, 2017 Coal Revenue $ 316,448 Other Outside Sales 12,886 Freight-Outside Coal 12,282 Miscellaneous Other Income 17,396 Gain on Sale of Assets 7,955 Total Revenue and Other Income $ 366,967 Total Costs 315,829 Income From Operations Before Income Taxes $ 51,138 Income Tax Benefit (6,367 ) Less: Net Income Attributable to Noncontrolling Interest 5,464 Income From Discontinued Operations, net $ 52,041

Acquisitions and Dispositions (

Acquisitions and Dispositions (Tables)	3 Months Ended
	Mar. 31, 2018
Business Combinations [Abstract]
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed	: Cash Consideration $ 305,000 CNX Gathering Cash on Hand at January 3, 2018 Distributed to Noble 2,620 Fair Value of Previously Held Equity Interest 799,033 Total Estimated Fair Value of Consideration Transferred $ 1,106,653 The following is a summary of the preliminary estimated fair values of the net assets acquired: Fair Value of Assets Acquired: Cash and Cash Equivalents $ 8,348 Accounts and Notes Receivable 21,199 Prepaid Expense 2,006 Other Current Assets 163 Property, Plant and Equipment, Net 1,043,340 Intangible Assets 128,781 Other 593 Total Assets Acquired 1,204,430 Fair Value of Liabilities Assumed: Accounts Payable 26,059 CNXM Revolving Credit Facility 149,500 Total Liabilities Assumed 175,559 Total Identifiable Net Assets 1,028,871 Fair Value of Noncontrolling Interest in CNXM (718,577 ) Goodwill 796,359 Net Assets Acquired $ 1,106,653
Schedule of Pro Forma Information	The pro forma combined financial information has been included for comparative purposes and is not necessarily indicative of the results that might have actually occurred had the acquisition been completed at January 1, 2017; furthermore, the financial information is not intended to be a projection of future results. Pro Forma (in thousands, except per share data) (unaudited) Three Months Ended March 31, 2017 Pro Forma Total Revenue and Other Operating Income $ 344,637 Pro Forma Net Loss from Continuing Operations $ (57,810 ) Less: Pro Forma Net income Attributable to Noncontrolling Interests $ 19,414 Pro Forma Net Loss from Continuing Operations Attributable to CNX $ (77,224 ) Pro Forma Loss per Share from Continuing Operations (Basic) $ (0.34 ) Pro Forma Loss per Share from Continuing Operations (Diluted) $ (0.34 ) The acquisition contributed the following to the Company's Midstream segment for the three months ended March 31, 2018. Three Months Ended March 31, 2018 Midstream Revenue $ 64,178 Earnings From Continuing Operations Before Income Tax $ 35,550

Components of Pension Plan Ne38

Components of Pension Plan Net Periodic Benefit Cost (Tables)	3 Months Ended
	Mar. 31, 2018
Retirement Benefits [Abstract]
Components of Net Periodic Costs	Components of Net Periodic Benefit Cost are as follows: For the Three Months Ended March 31, 2018 2017 Service Cost $ 96 $ 44 Interest Cost 300 143 Amortization of Prior Service Credits (90 ) (43 ) Recognized Net Actuarial Loss 373 181 Net Periodic Benefit Cost $ 679 $ 325

Property, Plant and Equipment (

Property, Plant and Equipment (Tables)	3 Months Ended
	Mar. 31, 2018
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment	March 31, December 31, Property, Plant and Equipment Intangible drilling cost $ 3,902,099 $ 3,849,689 Proved gas properties 975,256 1,999,891 Gas gathering equipment 2,146,869 1,182,234 Unproved gas properties 929,875 919,733 Gas wells and related equipment 772,542 834,120 Surface land and other equipment 310,460 309,602 Other gas assets 66,250 221,226 Total Property, Plant and Equipment $ 9,103,351 $ 9,316,495 Less: Accumulated Depreciation, Depletion and Amortization 2,481,535 3,526,742 Total Property, Plant and Equipment - Net $ 6,621,816 $ 5,789,753

Long-Term Debt (Tables)

Long-Term Debt (Tables)	3 Months Ended
	Mar. 31, 2018
Long-term Debt, Other Disclosures [Abstract]
Schedule of Long-term Debt	March 31, December 31, Debt: Senior Notes due April 2022 at 5.875% (Principal of $1,314,307 and $1,705,682 $ 1,316,880 $ 1,709,226 Senior Notes due April 2023 at 8.00% (Principal of $500,000 less Unamortized Discount of $4,525 and $4,751, respectively) 495,475 495,249 CNX Midstream Partners LP Senior Notes due March 2026 at 6.50% (Principal of $400,000 less Unamortized Discount of $5,938 at March 31, 2018) 394,062 — CNX Midstream Partners LP Revolving Credit Facility 20,000 — Other Note Maturing in 2018 (Principal of $358 less Unamortized Discount of $8 at December 31, 2017) — 350 Less: Unamortized Debt Issuance Costs 15,252 17,536 2,211,165 2,187,289 Less: Amounts Due in One Year* — 263 Long-Term Debt $ 2,211,165 $ 2,187,026 * Excludes current portion of Capital Lease Obligations of $6,891 and $ 6,848 at March 31, 2018 and December 31, 2017 , respectively.

Commitments and Contingent Li41

Commitments and Contingent Liabilities (Tables)	3 Months Ended
	Mar. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Long-term Purchase Commitment	At March 31, 2018 , CNX has provided the following financial guarantees, unconditional purchase obligations and letters of credit to certain third parties as described by major category in the following table. These amounts represent the maximum potential of total future payments that the Company could be required to make under these instruments. These amounts have not been reduced for potential recoveries under recourse or collateralization provisions. Generally, recoveries under reclamation bonds would be limited to the extent of the work performed at the time of the default. No amounts related to these unconditional purchase obligations and letters of credit are recorded as liabilities in the financial statements. CNX management believes that these commitments will expire without being funded, and therefore will not have a material adverse effect on financial condition. Amount of Commitment Expiration Per Period Total Amounts Committed Less Than 1 Year 1-3 Years 3-5 Years Beyond 5 Years Letters of Credit: Firm Transportation $ 252,882 $ 252,882 $ — $ — $ — Other 285 285 — — — Total Letters of Credit 253,167 253,167 — — — Surety Bonds: Employee-Related 1,850 1,850 — — — Environmental 5,438 3,513 1,925 — — Other 12,498 11,988 510 — — Total Surety Bonds 19,786 17,351 2,435 — — Total Commitments $ 272,953 $ 270,518 $ 2,435 $ — $ —
Schedule of Future Minimum Rental Payments for Operating Leases	Future minimum lease payments under operating leases at March 31, 2018 are as follows: Operating Lease Obligations Due Amount Less than 1 year $ 10,034 1 - 3 years 14,057 3 - 5 years 10,790 More than 5 years 39,667 Total Operating Lease Obligations $ 74,548
Unrecorded Unconditional Purchase Obligations Disclosure	As of March 31, 2018 , the purchase obligations for each of the next five years and beyond were as follows: Obligations Due Amount Less than 1 year $ 174,312 1 - 3 years 280,301 3 - 5 years 251,768 More than 5 years 593,715 Total Purchase Obligations $ 1,300,096

Derivative Instruments (Tables)

Derivative Instruments (Tables)	3 Months Ended
	Mar. 31, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Notional Amounts of Derivative Instruments	The total notional amounts of production of CNX's derivative instruments at March 31, 2018 and December 31, 2017 were as follows: March 31, December 31, Forecasted to 2018 2017 Settle Through Natural Gas Commodity Swaps (Bcf) 1,143.5 1,067.2 2022 Natural Gas Basis Swaps (Bcf) 766.9 688.1 2022
Schedule of Derivative Assets at Fair Value	The gross fair value of CNX's derivative instruments at March 31, 2018 and December 31, 2017 was as follows: Asset Derivative Instruments Liability Derivative Instruments March 31, December 31, March 31, December 31, 2018 2017 2018 2017 Commodity Swaps: Prepaid Expense $ 46,668 $ 62,369 Other Accrued Liabilities $ 20,908 $ 5,985 Other Assets 80,655 59,281 Other Liabilities 30,369 42,419 Total Asset $ 127,323 $ 121,650 Total Liability $ 51,277 $ 48,404 Basis Only Swaps: Prepaid Expense $ 25,922 $ 14,965 Other Accrued Liabilities $ 17,864 $ 35,306 Other Assets 43,481 24,223 Other Liabilities 15,557 17,179 Total Asset $ 69,403 $ 39,188 Total Liability $ 33,421 $ 52,485
Schedule of Derivative Liabilities at Fair Value	The gross fair value of CNX's derivative instruments at March 31, 2018 and December 31, 2017 was as follows: Asset Derivative Instruments Liability Derivative Instruments March 31, December 31, March 31, December 31, 2018 2017 2018 2017 Commodity Swaps: Prepaid Expense $ 46,668 $ 62,369 Other Accrued Liabilities $ 20,908 $ 5,985 Other Assets 80,655 59,281 Other Liabilities 30,369 42,419 Total Asset $ 127,323 $ 121,650 Total Liability $ 51,277 $ 48,404 Basis Only Swaps: Prepaid Expense $ 25,922 $ 14,965 Other Accrued Liabilities $ 17,864 $ 35,306 Other Assets 43,481 24,223 Other Liabilities 15,557 17,179 Total Asset $ 69,403 $ 39,188 Total Liability $ 33,421 $ 52,485
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value	The effect of derivative instruments on the Company's Consolidated Statements of Income was as follows: For the Three Months Ended March 31, 2018 2017 Cash Paid in Settlement of Commodity Derivative Instruments: Commodity Swaps: Natural Gas $ (434 ) $ (24,607 ) Propane — (1,216 ) Natural Gas Basis Swaps (16,557 ) (21,280 ) Total Cash Paid in Settlement of Commodity Derivative Instruments (16,991 ) (47,103 ) Unrealized Gain (Loss) on Commodity Derivative Instruments: Commodity Swaps: Natural Gas 2,800 162,604 Propane — 1,147 Natural Gas Basis Swaps 49,278 (139,111 ) Total Unrealized Gain on Commodity Derivative Instruments 52,078 24,640 Gain (Loss) on Commodity Derivative Instruments: Commodity Swaps: Natural Gas 2,366 137,997 Propane — (69 ) Natural Gas Basis Swaps 32,721 (160,391 ) Total Gain (Loss) on Commodity Derivative Instruments $ 35,087 $ (22,463 )

Fair Value of Financial Instr43

Fair Value of Financial Instruments (Tables)	3 Months Ended
	Mar. 31, 2018
Fair Value Disclosures [Abstract]
Fair Value, Assets Measured on Recurring Basis	The financial instruments measured at fair value on a recurring basis are summarized below: Fair Value Measurements at March 31, 2018 Fair Value Measurements at December 31, 2017 Description (Level 1) (Level 2) (Level 3) (Level 1) (Level 2) (Level 3) Gas Derivatives $ — $ 112,028 $ — $ — $ 59,949 $ — Put Option $ — $ — $ — $ — $ (3,500 ) $ —
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis	The carrying amounts and fair values of financial instruments for which the fair value option was not elected are as follows: March 31, 2018 December 31, 2017 Carrying Amount Fair Value Carrying Amount Fair Value Cash and Cash Equivalents $ 82,490 $ 82,490 $ 509,167 $ 509,167 Long-Term Debt $ 2,226,417 $ 2,264,496 $ 2,204,825 $ 2,281,282

Variable Interest Entities (Tab

Variable Interest Entities (Tables)	3 Months Ended
	Mar. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Schedule of Variable Interest Entities	The following table presents amounts included in the Company's Consolidated Balance Sheet that were for the use or obligation of CNXM as of March 31, 2018 : March 31, 2018 Assets: Cash $ 1,966 Receivables - Related Party 13,411 Receivables - Third Party 9,645 Other Current Assets 3,242 Property, Plant and Equipment, net 899,558 Other Assets 4,294 Liabilities: Accounts Payable $ 23,363 Accounts Payable - Related Party 3,056 Revolving Credit Facility 20,000 Long-Term Debt 392,647 The following table summarizes CNXM's Consolidated Statements of Operations and Cash Flows for the three months ended March 31, 2018 , inclusive of affiliate amounts: For the Three Months Ended March 31, 2018 Revenue Gathering Revenue - Related Party $ 37,730 Gathering Revenue - Third Party 26,139 Total Revenue 63,869 Expenses Operating Expense - Related Party 4,435 Operating Expense - Third Party 8,468 General and Administrative Expense - Related Party 3,612 General and Administrative Expense - Third Party 2,549 Loss on Asset Sales 2,755 Depreciation Expense 5,856 Interest Expense 2,489 Total Expense 30,164 Net Income $ 33,705 Net Cash Provided by Operating Activities $ 41,867 Net Cash Used in Investing Activities $ (10,156 ) Net Cash Used in Financing Activities $ (32,939 )
Investments in and Advances to Affiliates	The following is a summary of the Company's Investment in Affiliates balances included within the Consolidated Balance Sheets associated with CNX Gathering and CNXM, respectively: CNX Gathering CNXM Total Balance at December 31, 2016 $ 151,075 $ 18,133 $ 169,208 Equity in Earnings 9,823 38,523 48,346 Distributions (17,254 ) (24,929 ) (42,183 ) Asset Transfer (2,527 ) 2,527 — Balance at December 31, 2017 $ 141,117 $ 34,254 $ 175,371

Segment Information (Tables)

Segment Information (Tables)	3 Months Ended
	Mar. 31, 2018
Segment Reporting [Abstract]
Industry Segment Results	Industry segment results for the three months ended March 31, 2018 : Marcellus Shale Utica Shale Coalbed Methane Other Gas Total E&P Midstream Unallocated Intercompany Eliminations Consolidated Natural Gas, NGLs and Oil Revenue $ 205,016 $ 130,322 $ 57,501 $ 12,784 $ 405,623 $ — $ — $ — $ 405,623 (A) Purchased Gas Revenue — — — 18,055 18,055 — — — 18,055 Midstream Revenue — — — — — 64,178 — (37,924 ) 26,254 (Loss) Gain on Commodity Derivative Instruments (9,513 ) (4,474 ) (2,430 ) 51,504 35,087 — — — 35,087 Other Operating Income — — — 10,791 10,791 — — (81 ) 10,710 (B) Total Revenue and Other Operating Income $ 195,503 $ 125,848 $ 55,071 $ 93,134 $ 469,556 $ 64,178 $ — $ (38,005 ) $ 495,729 Earnings (Loss) From Continuing Operations Before Income Tax $ 44,242 $ 56,107 $ 13,117 $ (13,657 ) $ 99,809 $ 35,534 $ 623,897 $ — $ 759,240 Segment Assets $ 6,034,660 $ 1,999,671 $ 102,668 $ (14,770 ) $ 8,122,229 (C) Depreciation, Depletion and Amortization $ 115,866 $ 8,801 $ — $ — $ 124,667 Capital Expenditures $ 216,508 $ 15,977 $ — $ — $ 232,485 (A) Included in Total Natural Gas, NGLs and Oil Revenue are sales of $72,637 to NJR Energy Services Company and $57,907 to Direct Energy Business Marketing LLC, each of which comprises over 10% of sales. (B) Includes equity in earnings of unconsolidated affiliates of $1,778 for Total E&P (C) Includes investments in unconsolidated equity affiliates of $20,678 for Total E&P. Industry segment results for the three months ended March 31, 2017 : Marcellus Utica Shale Coalbed Methane Other Total Unallocated Consolidated Natural Gas, NGLs and Oil Revenue $ 189,175 $ 53,668 $ 58,626 $ 16,294 $ 317,763 $ — $ 317,763 (D) Purchased Gas Revenue — — — 8,979 8,979 — 8,979 (Loss) Gain on Commodity Derivative Instruments (32,665 ) (2,688 ) (9,198 ) 22,088 (22,463 ) — (22,463 ) Other Operating Income — — — 15,650 15,650 — 15,650 Total Revenue and Other Operating Income $ 156,510 $ 50,980 $ 49,428 $ 63,011 $ 319,929 $ — $ 319,929 Earnings (Loss) From Continuing Operations Before Income Tax $ 29,969 $ 17,807 $ 3,608 $ (186,560 ) $ (135,176 ) $ (3,253 ) $ (138,429 ) (E) Segment Assets $ 6,350,772 $ 2,668,825 $ 9,019,597 (F) Depreciation, Depletion and Amortization $ 95,678 $ — $ 95,678 Capital Expenditures $ 103,922 $ — $ 103,922 (D) Included in Total Natural Gas, NGLs and Oil Revenue are sales of $57,030 to NJR Energy Services Company and $46,366 to Direct Energy Business Marketing LLC, each of which comprises over 10% of sales. (E) Includes equity in earnings of unconsolidated affiliates of $12,330 for Total E&P. (F) Includes investments in unconsolidated equity affiliates of $197,385 for Total E&P.
Reconciliation of Revenue from Segments to Consolidated	Revenue and Other Operating Income For the Three Months Ended March 31, 2018 2017 Total Segment Revenue from Contracts with External Customers $ 449,932 $ 326,742 Gain (Loss) on Commodity Derivative Instruments 35,087 (22,463 ) Other Operating Income 10,710 15,650 Total Consolidated Revenue and Other Operating Income $ 495,729 $ 319,929
Reconciliation of Revenue and Operating Income from Segments to Consolidated	Income (Loss) From Continuing Operations Before Income Tax: For the Three Months Ended March 31, 2018 2017 Segment Income (Loss) Before Income Taxes for reportable business segments: Marcellus Shale $ 44,242 $ 29,969 Utica Shale 56,107 17,807 Coalbed Methane 13,117 3,608 Other Gas (13,657 ) (186,560 ) Total E&P 99,809 (135,176 ) Midstream 35,534 — Total Segment Income (Loss) Before Income Taxes for reportable business segments 135,343 (135,176 ) Unallocated Expenses: Other Income (Expense) 6,493 (4,075 ) Gain on Sale of Assets 9,376 — Gain on Previously Held Equity Interest 623,663 — Loss on debt extinguishment (15,635 ) 822 Income (Loss) From Continuing Operations Before Income Tax $ 759,240 $ (138,429 )
Reconciliation of Assets and Liabilities from Segment to Consolidated	Total Assets: March 31, 2018 2017 Segment assets for total reportable business segments E&P $ 6,034,660 $ 6,350,772 Midstream 1,999,671 — Intercompany Eliminations (14,770 ) — Items excluded from segment assets: Cash and other investments 82,490 53,766 Recoverable income taxes 20,178 121,243 Discontinued Operations — 2,493,816 Total Consolidated Assets $ 8,122,229 $ 9,019,597

Goodwill and Other Intangible46

Goodwill and Other Intangible Assets (Tables)	3 Months Ended
	Mar. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Goodwill	All goodwill is attributed to the Midstream reportable segment. Changes in the carrying amount of goodwill consist of the following activity: December 31, 2017 $ — Acquisitions 796,359 March 31, 2018 $ 796,359
Schedule of Finite-Lived Intangible Assets	The carrying amount and accumulated amortization of other intangible assets consist of the following: March 31, 2018 December 31, 2017 Other Intangible Assets Customer Relationships $ 128,781 $ — Less: accumulated amortization for customer relationships (1,922 ) — Total other intangible assets, net $ 126,859 $ —
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense	The estimated future annual amortization expense for the next five fiscal years for other intangible assets recorded at March 31, 2018 is as follows: 2019 2020 2021 2022 2023 Estimated annual amortization expense $ 7,688 $ 7,688 $ 7,688 $ 7,688 $ 7,688

Earnings Per Share Anti-Dilutiv

Earnings Per Share Anti-Dilutive Options and Units Excluded from Earnings Per Share (Details) - shares	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from the computation of diluted earnings per share (in shares)	3,544,550	8,988,979
Employee Stock Option [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from the computation of diluted earnings per share (in shares)	2,293,506	5,472,165
Restricted Stock Units (RSUs) [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from the computation of diluted earnings per share (in shares)	11,480	951,320
Performance Share Units [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from the computation of diluted earnings per share (in shares)	312,296	1,762,690
Performance Share Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from the computation of diluted earnings per share (in shares)	927,268	802,804

Earnings Per Share Share-based

Earnings Per Share Share-based Compensation (Details) - shares	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total share-based awards, exercised or released (in shares)	682,451	956,600
Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options exercised (in shares)	153,718	61,624
Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options exercised (in shares)	171,137	334,040
Performance Share Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options exercised (in shares)	357,596	560,936

Earnings Per Share Earnings Per

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	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	0.23
Total Dilutive (in usd per share)	$ 2.35	$ (0.17)

Changes in Accumulated Other 50

Changes in Accumulated Other Comprehensive Loss Changes in Accumulated Other Comprehensive Income / (Loss) by Component (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2018USD ($)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at December 31, 2017	$ (8,476)
Amounts Reclassified from Accumulated Other Comprehensive Loss, net of tax	170
Balance at March 31, 2018	$ (8,306)

Changes in Accumulated Other 51

Changes in Accumulated Other Comprehensive Loss Reclassification of Adjustments out of AOCI (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Equity [Abstract]
Amortization of Prior Service Costs	$ (90)	$ (749)
Recognized Net Actuarial Loss	354	6,303
Total	264	5,554
Less: Tax Benefit	94	2,052
Net of Tax	$ 170	$ 3,502

Revenue from Contract with Cu52

Revenue from Contract with Cusomter Performance Obligation (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2018USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2018-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligations	$ 2,299
Remaining performance obligations, expected timing of satisfaction	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligations	$ 7,938
Remaining performance obligations, expected timing of satisfaction	2 years

Revenue from Contract with Cu53

Revenue from Contract with Cusomter Narrative (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Jan. 03, 2018	Dec. 31, 2017
Business Acquisition [Line Items]
Trade	$ 157,605		$ 156,817
Midstream Acquisition [Member]
Business Acquisition [Line Items]
Receivables related to acquisition		$ 9,353

Revenue from Contract with Cu54

Revenue from Contract with Cusomter Disaggregated Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Disaggregation of Revenue [Line Items]
Total Segment Revenue from Contracts with External Customers	$ 405,623	$ 317,763
Gain (Loss) on Commodity Derivative Instruments	35,087	(22,463)
Other Operating Income	10,710	15,650
Total Revenue and Other Operating Income	495,729	319,929
Natural Gas [Member]
Disaggregation of Revenue [Line Items]
Total Segment Revenue from Contracts with External Customers	347,348	273,546
NGLs [Member]
Disaggregation of Revenue [Line Items]
Total Segment Revenue from Contracts with External Customers	50,884	39,283
Condensate [Member]
Disaggregation of Revenue [Line Items]
Total Segment Revenue from Contracts with External Customers	6,503	4,305
Oil [Member]
Disaggregation of Revenue [Line Items]
Total Segment Revenue from Contracts with External Customers	888	629
Purchased Gas [Member]
Disaggregation of Revenue [Line Items]
Total Segment Revenue from Contracts with External Customers	18,055	8,979
Midstream [Member]
Disaggregation of Revenue [Line Items]
Total Segment Revenue from Contracts with External Customers	$ 26,254	$ 0

Discontinued Operations (Detail

Discontinued Operations (Details) - Buchanan and Other Assets [Member] $ in Thousands	3 Months Ended
	Mar. 31, 2017USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Coal Revenue	$ 316,448
Other Outside Sales	12,886
Freight-Outside Coal	12,282
Miscellaneous Other Income	17,396
Gain on Sale of Assets	7,955
Total Revenue and Other Income	366,967
Total Costs	315,829
Income From Operations Before Income Taxes	51,138
Income Tax Benefit	(6,367)
Less: Net Income Attributable to Noncontrolling Interest	5,464
Income From Discontinued Operations, net	$ 52,041

Acquisitions and Dispositions N

Acquisitions and Dispositions Narrative (Details) - USD ($) $ in Thousands	Mar. 30, 2018	Jan. 03, 2018	Dec. 14, 2017	Mar. 31, 2018	Mar. 31, 2017	Dec. 13, 2017
Business Acquisition [Line Items]
Net gain on sale				$ 11,342	$ 3,996
Business Combination, Step Acquisition, Equity Interest in Acquiree, Remeasurement Gain				$ 623,663	$ 0
Midstream Acquisition [Member]
Business Acquisition [Line Items]
Cash consideration transferred		$ 305,000	$ 305,000
Fair value of previously held equity interest		799,033
Business Combination, Step Acquisition, Equity Interest in Acquiree, Remeasurement Gain		$ 623,663
Shallow Oil, Gas, and CBM Assets in Pennsylvania and West Virginia [Member]
Business Acquisition [Line Items]
Cash consideration received in sale of oil and gas assets	$ 87,510
Asset retirement obligations assumed	196,514
Net gain on sale	$ 4,751
CNX Gathering LLC [Member]
Business Acquisition [Line Items]
Ownership percentage in equity method investment		50.00%	50.00%	50.00%		50.00%
CONE Midstream GP LLC [Member]
Business Acquisition [Line Items]
Ownership percentage by parent			100.00%

Acquisitions and Dispositions C

Acquisitions and Dispositions Consideration Given In Acquisition (Details) - Midstream Acquisition [Member] - USD ($) $ in Thousands	Jan. 03, 2018	Dec. 14, 2017
Business Acquisition [Line Items]
Cash Consideration	$ 305,000	$ 305,000
CNX Gathering Cash on Hand at January 3, 2018 Distributed to Noble	2,620
Fair Value of Previously Held Equity Interest	799,033
Total Estimated Fair Value of Consideration Transferred	$ 1,106,653

Acquisitions and Dispositions F

Acquisitions and Dispositions Fair Value of Net Assets Acquired (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Jan. 03, 2018	Dec. 31, 2017
Total Identifiable Net Assets
Goodwill	$ 796,359		$ 0
Midstream Acquisition [Member]
Fair Value of Assets Acquired:
Cash and Cash Equivalents		$ 8,348
Accounts and Notes Receivable		21,199
Prepaid Expense		2,006
Other Current Assets		163
Property, Plant and Equipment, Net		1,043,340
Intangible Assets		128,781
Other		593
Total Assets Acquired		1,204,430
Fair Value of Liabilities Assumed:
Accounts Payable		26,059
CNXM Revolving Credit Facility		149,500
Total Liabilities Assumed		175,559
Total Identifiable Net Assets
Total Identifiable Net Assets		1,028,871
Fair Value of Noncontrolling Interest in CNXM		(718,577)
Goodwill		796,359
Net Assets Acquired		$ 1,106,653

Acquisitions and Dispositions P

Acquisitions and Dispositions Post Acquisition Operating Results (Details) - CNXM [Member] - Midstream Acquisition [Member] $ in Thousands	3 Months Ended
	Mar. 31, 2018USD ($)
Business Acquisition [Line Items]
Midstream Revenue	$ 64,178
Earnings From Continuing Operations Before Income Tax	$ 35,550

Acquisitions and Dispositions60

Acquisitions and Dispositions Pro Forma Financial Information (Details) - Midstream Acquisition [Member] $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2017USD ($)$ / shares
Business Acquisition [Line Items]
Pro Forma Total Revenue and Other Operating Income	$ 344,637
Pro Forma Net Loss from Continuing Operations	(57,810)
Less: Pro Forma Net income Attributable to Noncontrolling Interests	19,414
Pro Forma Net Loss from Continuing Operations Attributable to CNX	$ (77,224)
Pro Forma Loss per Share from Continuing Operations (Basic) (usd per share) | $ / shares	$ (0.34)
Pro Forma Loss per Share from Continuing Operations (Diluted) (usd per share) | $ / shares	$ (0.34)

Components of Pension Plan Ne61

Components of Pension Plan Net Periodic Benefit Cost (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Amortization of Prior Service Credits	$ (90)	$ (749)
Recognized Net Actuarial Loss	354	6,303
Total	264	5,554
Pension Plan [Member]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service Cost	96	44
Interest Cost	300	143
Amortization of Prior Service Credits	(90)	(43)
Recognized Net Actuarial Loss	373	181
Total	$ 679	$ 325

Income Tax Reconciliation (Deta

Income Tax Reconciliation (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Effective tax rate, percentage	28.80%	34.30%
Total amount of uncertain tax positions	$ 37,813		$ 37,813
Unrecognized tax benefits that would impact effective tax rate	29,376		29,376
Accrued interest liability	728		$ 644
Accrued interest expense	$ 84

Property, Plant and Equipment63

Property, Plant and Equipment (Details) a in Thousands, $ in Thousands	1 Months Ended	3 Months Ended
	Feb. 28, 2017USD ($)	Mar. 31, 2018USD ($)a	Mar. 31, 2017USD ($)	Dec. 31, 2017USD ($)
Property, Plant and Equipment [Line Items]
Total Property, Plant and Equipment		$ 9,103,351		$ 9,316,495
Less: Accumulated Depreciation, Depletion and Amortization		2,481,535		3,526,742
Total Property, Plant and Equipment—Net		6,621,816		5,789,753
Impairment on Knox		0	$ 137,865
Gas Segment [Member]
Property, Plant and Equipment [Line Items]
Intangible drilling cost		3,902,099		3,849,689
Proved gas properties		975,256		1,999,891
Gas gathering equipment		2,146,869		1,182,234
Unproved gas properties		929,875		919,733
Gas wells and related equipment		772,542		834,120
Surface land and other equipment		310,460		309,602
Other gas assets		66,250		221,226
Total Property, Plant and Equipment		9,103,351		9,316,495
Less: Accumulated Depreciation, Depletion and Amortization		2,481,535		3,526,742
Total Property, Plant and Equipment—Net		$ 6,621,816		$ 5,789,753
Knox and Coalfield [Member]
Property, Plant and Equipment [Line Items]
Impairment on Knox	$ 137,865
Joint Venture [Member]
Property, Plant and Equipment [Line Items]
Undivided interest under joint development agreement		50.00%
Drilling carry, working interest obligations		50.00%
Joint Venture [Member] | Utica Shale [Member]
Property, Plant and Equipment [Line Items]
Net Utica Shale acres | a		125
Joint Venture [Member] | Hess [Member]
Property, Plant and Equipment [Line Items]
Drilling commitment carry		$ 335,000

Revolving Credit Facilities (De

Revolving Credit Facilities (Details)	Mar. 08, 2018USD ($)	Mar. 31, 2018USD ($)	Mar. 07, 2018USD ($)	Dec. 31, 2017USD ($)
Short-term Debt [Line Items]
Percentage to mortgage, value of proved Reserves		80.00%
Percentage to mortgage, value of proved developing producing reserves		80.00%
Revolving Credit Facility [Member]
Short-term Debt [Line Items]
Credit facility, face amount	$ 2,100,000,000		$ 1,500,000,000	$ 1,500,000,000
Accordion feature, increased commitment	3,000,000,000
Initial borrowing base	2,500,000,000		2,000,000,000
Revolving Credit Facility	$ 650,000,000
Minimum threshold to activate springing maturity date		$ 500,000,000
Maximum net leverage ratio	4
Minimum current ratio	1
Borrowings outstanding		0		0
Letters of credit outstanding		253,167,000		239,072,000
Borrowings and issuance of letters of credit remaining capacity		1,846,833,000		$ 1,260,928,000
8.00% Senior Notes due 2023 [Member]
Short-term Debt [Line Items]
Stated rate, debt instrument	8.00%
5.875% Senior Notes due 2022 [Member]
Short-term Debt [Line Items]
Stated rate, debt instrument	5.875%
CNX Midstream Partners LP [Member] | Revolving Credit Facility [Member]
Short-term Debt [Line Items]
Revolving Credit Facility	$ 600,000,000		$ 250,000,000
Borrowings outstanding		$ 20,000,000
CNXM [Member] | Revolving Credit Facility [Member]
Short-term Debt [Line Items]
Secured Leverage Ratio	3.50
Interest Coverage Ratio	2.50
CNXM [Member] | Minimum [Member] | Revolving Credit Facility [Member]
Short-term Debt [Line Items]
Maximum net leverage ratio	4.75
CNXM [Member] | Maximum [Member] | Revolving Credit Facility [Member]
Short-term Debt [Line Items]
Maximum net leverage ratio	5.50

Long-Term Debt (Details)

Long-Term Debt (Details) - USD ($)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 08, 2018	Mar. 07, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Gain (loss) on extinguishment of debt	$ 15,635,000	$ (822,000)
Senior Notes due March 2026 [Member]
Debt Instrument [Line Items]
Debt instrument, face amount	400,000,000
Senior Notes Due April 2022 [Member]
Debt Instrument [Line Items]
Debt instrument, face amount	$ 1,314,307,000				$ 1,705,682,000
Stated rate, debt instrument	5.875%	5.875%
Repurchase amount on debt instrument	$ 391,375,000	$ 99,956,000
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Debt instrument, face amount			$ 2,100,000,000	$ 1,500,000,000	1,500,000,000
Revolving Credit Facility			650,000,000
Long-Term Debt	0				$ 0
CNX Midstream Partners LP [Member] | Senior Notes due March 2026 [Member]
Debt Instrument [Line Items]
Debt instrument, face amount	$ 400,000,000
Stated rate, debt instrument	6.50%
Unamortized bond discount	$ 6,000,000
CNX Midstream Partners LP [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Revolving Credit Facility			$ 600,000,000	$ 250,000,000
Long-Term Debt	$ 20,000,000

Long-Term Debt Schedule of Long

Long-Term Debt Schedule of Long-Term Debt (Details) - USD ($)	Mar. 31, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Long-term Debt, Gross	$ 2,211,165,000	$ 2,187,289,000
Less: Unamortized Debt Issuance Costs	15,252,000	17,536,000
Less: Amounts Due in One Year	0	263,000
Long-Term Debt	2,211,165,000	2,187,026,000
Current portion of capital lease obligation	6,891,000	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	2,573,000	3,544,000
Long-term Debt, Gross	1,316,880,000	1,709,226,000
Senior Notes due April 2023 [Member]
Debt Instrument [Line Items]
Debt instrument, face amount	500,000,000	500,000,000
Debt Instrument, Unamortized Discount	4,525,000	4,751,000
Long-term Debt, Gross	495,475,000	495,249,000
Senior Notes due March 2026 [Member]
Debt Instrument [Line Items]
Debt instrument, face amount	400,000,000
Debt Instrument, Unamortized Discount	5,938,000
Long-term Debt, Gross	394,062,000	0
Revolving Credit Facility - CNXM [Member]
Debt Instrument [Line Items]
Long-term Debt, Gross	20,000,000	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

Commitments and Contingent Li67

Commitments and Contingent Liabilities Amount of Commitment Expiration Per Period (Details) $ in Thousands	Mar. 31, 2018USD ($)
Schedule of Costs Related to Purchase Obligations [Line Items]
Guarantor obligations, maximum exposure	$ 272,953
Less Than 1 Year [Member]
Schedule of Costs Related to Purchase Obligations [Line Items]
Guarantor obligations, maximum exposure	270,518
1-3 Years [Member]
Schedule of Costs Related to Purchase Obligations [Line Items]
Guarantor obligations, maximum exposure	2,435
3-5 Years [Member]
Schedule of Costs Related to Purchase Obligations [Line Items]
Guarantor obligations, maximum exposure	0
Beyond 5 Years [Member]
Schedule of Costs Related to Purchase Obligations [Line Items]
Guarantor obligations, maximum exposure	0
Standby Letters of Credit [Member] | Firm Transportation [Member]
Schedule of Costs Related to Purchase Obligations [Line Items]
Guarantor obligations, maximum exposure	252,882
Standby Letters of Credit [Member] | Other Commitments [Member]
Schedule of Costs Related to Purchase Obligations [Line Items]
Guarantor obligations, maximum exposure	285
Standby Letters of Credit [Member] | Loss Contingencies by Secondary Nature of Contingency [Domain]
Schedule of Costs Related to Purchase Obligations [Line Items]
Guarantor obligations, maximum exposure	253,167
Standby Letters of Credit [Member] | Less Than 1 Year [Member] | Firm Transportation [Member]
Schedule of Costs Related to Purchase Obligations [Line Items]
Guarantor obligations, maximum exposure	252,882
Standby Letters of Credit [Member] | Less Than 1 Year [Member] | Other Commitments [Member]
Schedule of Costs Related to Purchase Obligations [Line Items]
Guarantor obligations, maximum exposure	285
Standby Letters of Credit [Member] | Less Than 1 Year [Member] | Loss Contingencies by Secondary Nature of Contingency [Domain]
Schedule of Costs Related to Purchase Obligations [Line Items]
Guarantor obligations, maximum exposure	253,167
Standby Letters of Credit [Member] | 1-3 Years [Member] | Firm Transportation [Member]
Schedule of Costs Related to Purchase Obligations [Line Items]
Guarantor obligations, maximum exposure	0
Standby Letters of Credit [Member] | 1-3 Years [Member] | Other Commitments [Member]
Schedule of Costs Related to Purchase Obligations [Line Items]
Guarantor obligations, maximum exposure	0
Standby Letters of Credit [Member] | 1-3 Years [Member] | Loss Contingencies by Secondary Nature of Contingency [Domain]
Schedule of Costs Related to Purchase Obligations [Line Items]
Guarantor obligations, maximum exposure	0
Standby Letters of Credit [Member] | 3-5 Years [Member] | Firm Transportation [Member]
Schedule of Costs Related to Purchase Obligations [Line Items]
Guarantor obligations, maximum exposure	0
Standby Letters of Credit [Member] | 3-5 Years [Member] | Other Commitments [Member]
Schedule of Costs Related to Purchase Obligations [Line Items]
Guarantor obligations, maximum exposure	0
Standby Letters of Credit [Member] | 3-5 Years [Member] | Loss Contingencies by Secondary Nature of Contingency [Domain]
Schedule of Costs Related to Purchase Obligations [Line Items]
Guarantor obligations, maximum exposure	0
Standby Letters of Credit [Member] | Beyond 5 Years [Member] | Firm Transportation [Member]
Schedule of Costs Related to Purchase Obligations [Line Items]
Guarantor obligations, maximum exposure	0
Standby Letters of Credit [Member] | Beyond 5 Years [Member] | Other Commitments [Member]
Schedule of Costs Related to Purchase Obligations [Line Items]
Guarantor obligations, maximum exposure	0
Standby Letters of Credit [Member] | Beyond 5 Years [Member] | Loss Contingencies by Secondary Nature of Contingency [Domain]
Schedule of Costs Related to Purchase Obligations [Line Items]
Guarantor obligations, maximum exposure	0
Surety Bond [Member] | Other Commitments [Member]
Schedule of Costs Related to Purchase Obligations [Line Items]
Guarantor obligations, maximum exposure	12,498
Surety Bond [Member] | Employee Related Commitments [Member]
Schedule of Costs Related to Purchase Obligations [Line Items]
Guarantor obligations, maximum exposure	1,850
Surety Bond [Member] | Environment Related Commitments [Member]
Schedule of Costs Related to Purchase Obligations [Line Items]
Guarantor obligations, maximum exposure	5,438
Surety Bond [Member] | Loss Contingencies by Secondary Nature of Contingency [Domain]
Schedule of Costs Related to Purchase Obligations [Line Items]
Guarantor obligations, maximum exposure	19,786
Surety Bond [Member] | Less Than 1 Year [Member] | Other Commitments [Member]
Schedule of Costs Related to Purchase Obligations [Line Items]
Guarantor obligations, maximum exposure	11,988
Surety Bond [Member] | Less Than 1 Year [Member] | Employee Related Commitments [Member]
Schedule of Costs Related to Purchase Obligations [Line Items]
Guarantor obligations, maximum exposure	1,850
Surety Bond [Member] | Less Than 1 Year [Member] | Environment Related Commitments [Member]
Schedule of Costs Related to Purchase Obligations [Line Items]
Guarantor obligations, maximum exposure	3,513
Surety Bond [Member] | Less Than 1 Year [Member] | Loss Contingencies by Secondary Nature of Contingency [Domain]
Schedule of Costs Related to Purchase Obligations [Line Items]
Guarantor obligations, maximum exposure	17,351
Surety Bond [Member] | 1-3 Years [Member] | Other Commitments [Member]
Schedule of Costs Related to Purchase Obligations [Line Items]
Guarantor obligations, maximum exposure	510
Surety Bond [Member] | 1-3 Years [Member] | Employee Related Commitments [Member]
Schedule of Costs Related to Purchase Obligations [Line Items]
Guarantor obligations, maximum exposure	0
Surety Bond [Member] | 1-3 Years [Member] | Environment Related Commitments [Member]
Schedule of Costs Related to Purchase Obligations [Line Items]
Guarantor obligations, maximum exposure	1,925
Surety Bond [Member] | 1-3 Years [Member] | Loss Contingencies by Secondary Nature of Contingency [Domain]
Schedule of Costs Related to Purchase Obligations [Line Items]
Guarantor obligations, maximum exposure	2,435
Surety Bond [Member] | 3-5 Years [Member] | Other Commitments [Member]
Schedule of Costs Related to Purchase Obligations [Line Items]
Guarantor obligations, maximum exposure	0
Surety Bond [Member] | 3-5 Years [Member] | Employee Related Commitments [Member]
Schedule of Costs Related to Purchase Obligations [Line Items]
Guarantor obligations, maximum exposure	0
Surety Bond [Member] | 3-5 Years [Member] | Environment Related Commitments [Member]
Schedule of Costs Related to Purchase Obligations [Line Items]
Guarantor obligations, maximum exposure	0
Surety Bond [Member] | 3-5 Years [Member] | Loss Contingencies by Secondary Nature of Contingency [Domain]
Schedule of Costs Related to Purchase Obligations [Line Items]
Guarantor obligations, maximum exposure	0
Surety Bond [Member] | Beyond 5 Years [Member] | Other Commitments [Member]
Schedule of Costs Related to Purchase Obligations [Line Items]
Guarantor obligations, maximum exposure	0
Surety Bond [Member] | Beyond 5 Years [Member] | Employee Related Commitments [Member]
Schedule of Costs Related to Purchase Obligations [Line Items]
Guarantor obligations, maximum exposure	0
Surety Bond [Member] | Beyond 5 Years [Member] | Environment Related Commitments [Member]
Schedule of Costs Related to Purchase Obligations [Line Items]
Guarantor obligations, maximum exposure	0
Surety Bond [Member] | Beyond 5 Years [Member] | Loss Contingencies by Secondary Nature of Contingency [Domain]
Schedule of Costs Related to Purchase Obligations [Line Items]
Guarantor obligations, maximum exposure	$ 0

Commitments and Contingent Li68

Commitments and Contingent Liabilities Operating Lease Obligations Due (Details) $ in Thousands	Mar. 31, 2018USD ($)
Commitments and Contingencies Disclosure [Abstract]
Less than 1 year	$ 10,034
1 - 3 years	14,057
3 - 5 years	10,790
More than 5 years	39,667
Total Operating Lease Obligations	$ 74,548

Commitments and Contingent Li69

Commitments and Contingent Liabilities Unrecorded Unconditional Purchase Obligation (Details) - Purchase Commitment [Member] $ in Thousands	Mar. 31, 2018USD ($)
Unrecorded Unconditional Purchase Obligation [Line Items]
Less than 1 year	$ 174,312
1 - 3 years	280,301
3 - 5 years	251,768
More than 5 years	593,715
Total Purchase Obligations	$ 1,300,096

Derivative Instruments Notional

Derivative Instruments Notional Amounts of Derivative Instruments (Details) - MMcf MMcf in Billions	3 Months Ended	12 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Commodity Member [Member]
Derivative [Line Items]
Notional amount	1,143.5	1,067.2
Basis Swap [Member]
Derivative [Line Items]
Notional amount	766.9	688.1

Financial Instruments Measured

Financial Instruments Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]
Gas Derivatives	$ 0	$ 0
Put Option	0	0
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]
Gas Derivatives	112,028	59,949
Put Option	0	(3,500)
Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]
Gas Derivatives	0	0
Put Option	$ 0	$ 0

Derivative Instruments Fair Val

Derivative Instruments Fair Value of Derivative Instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Commodity Swaps [Member]
Asset Derivative Instruments
Prepaid Expense	$ 46,668	$ 62,369
Other Assets	80,655	59,281
Total Asset	127,323	121,650
Liability Derivative Instruments
Other Accrued Liabilities	20,908	5,985
Other Liabilities	30,369	42,419
Total Liability	51,277	48,404
Basis Swap [Member]
Asset Derivative Instruments
Prepaid Expense	25,922	14,965
Other Assets	43,481	24,223
Total Asset	69,403	39,188
Liability Derivative Instruments
Other Accrued Liabilities	17,864	35,306
Other Liabilities	15,557	17,179
Total Liability	$ 33,421	$ 52,485

Fair Value Disclosures (Details

Fair Value Disclosures (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017	Dec. 31, 2016
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and Cash Equivalents	$ 82,490	$ 509,167	$ 53,766	$ 46,299
Long-Term Debt	2,211,165	2,187,289
Long-term Debt, Fair Value	2,264,496	2,281,282
Carrying Amount [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and Cash Equivalents	82,490	509,167
Long-Term Debt	$ 2,226,417	$ 2,204,825

Derivative Instruments The Effe

Derivative Instruments The Effect of Derivative Instruments on the Consolidated Statement of Income (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Derivative [Line Items]
Cash Paid in Settlement of Commodity Derivative Instruments:	$ (16,991)	$ (47,103)
Unrealized Gain (Loss) on Commodity Derivative Instruments:	52,078	24,640
Gain (Loss) on Commodity Derivative Instruments	35,087	(22,463)
Basis Swap [Member]
Derivative [Line Items]
Cash Paid in Settlement of Commodity Derivative Instruments:	(16,557)	(21,280)
Unrealized Gain (Loss) on Commodity Derivative Instruments:	49,278	(139,111)
Gain (Loss) on Commodity Derivative Instruments	32,721	(160,391)
Natural Gas [Member] | Commodity Swaps [Member]
Derivative [Line Items]
Cash Paid in Settlement of Commodity Derivative Instruments:	(434)	(24,607)
Unrealized Gain (Loss) on Commodity Derivative Instruments:	2,800	162,604
Gain (Loss) on Commodity Derivative Instruments	2,366	137,997
Propane [Member] | Commodity Swaps [Member]
Derivative [Line Items]
Cash Paid in Settlement of Commodity Derivative Instruments:	0	(1,216)
Unrealized Gain (Loss) on Commodity Derivative Instruments:	0	1,147
Gain (Loss) on Commodity Derivative Instruments	$ 0	$ (69)

Variable Interest Entities (Det

Variable Interest Entities (Details) - USD ($) $ in Thousands	Mar. 30, 2018	Mar. 31, 2018	Dec. 31, 2017
Variable Interest Entity [Line Items]
Payable to affiliates			$ 10
Variable Interest Entity, Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Variable interest entity, ownership percentage		34.00%
CNX Midstream Partners LP [Member] | Senior Notes due March 2026 [Member]
Variable Interest Entity [Line Items]
Stated rate, debt instrument		6.50%
Shirley-Penns System [Member]
Variable Interest Entity [Line Items]
Ownership percentage by parent		95.00%
Cash consideration transferred	$ 265,000

Variable Interest Entities Bala

Variable Interest Entities Balance Sheet (Details) - Variable Interest Entity, Primary Beneficiary [Member] $ in Thousands	Mar. 31, 2018USD ($)
Cash [Member]
ASSETS
Current assets	$ 1,966
Receivables - Related Party [Member]
ASSETS
Current assets	13,411
Receivables Excluding Third Party [Member]
ASSETS
Current assets	9,645
Other Current Assets [Member]
ASSETS
Current assets	3,242
Property, Plant and Equipment [Member]
ASSETS
Non-current assets	899,558
Other Noncurrent Assets [Member]
ASSETS
Non-current assets	4,294
Accounts Payable [Member]
Liabilities:
Current liabilities	23,363
Accounts Payable - Related Party [Member]
Liabilities:
Current liabilities	3,056
Revolving Credit Facility [Member]
Liabilities:
Current liabilities	20,000
Long-term Debt [Member]
Liabilities:
Non-current liabilities	$ 392,647

Variable Interest Entities Stat

Variable Interest Entities Statement of Operations and Cash Flows (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Variable Interest Entity [Line Items]
Total Consolidated Revenue and Other Operating Income	$ 495,729	$ 319,929
Loss on Asset Sales	11,342	3,996
Interest Expense	38,551	41,606
Total Expense	(263,511)	458,358
Net Income	527,563	(38,966)
Net Cash Provided by Operating Activities	259,340	211,795
Net Cash Used in Investing Activities	(426,344)	(87,642)
Net Cash Used in Financing Activities	(259,673)	$ (116,686)
Variable Interest Entity, Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Gathering Revenue - Related Party	37,730
Gathering Revenue - Third Party	26,139
Total Consolidated Revenue and Other Operating Income	63,869
Operating Expense - Related Party	4,435
Operating Expense - Third Party	8,468
General and Administrative Expense - Related Party	3,612
General and Administrative Expense, Third Parties	2,549
Loss on Asset Sales	2,755
Depreciation Expense	5,856
Interest Expense	2,489
Total Expense	30,164
Net Income	33,705
Net Cash Provided by Operating Activities	41,867
Net Cash Used in Investing Activities	(10,156)
Net Cash Used in Financing Activities	$ (32,939)

Variable Interest Entities Inve

Variable Interest Entities Investment in Affiliates (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Equity Method [Roll Forward]
Equity Method Investments	$ 175,371	$ 169,208	$ 169,208
Equity in Earnings	1,778	12,330	48,346
Distributions			(42,183)
Asset Transfer			0
Equity Method Investments			175,371
CNX Gathering LLC [Member]
Equity Method [Roll Forward]
Equity Method Investments	141,117	151,075	151,075
Equity in Earnings			9,823
Distributions			(17,254)
Asset Transfer			(2,527)
Equity Method Investments			141,117
CNXM [Member]
Equity Method [Roll Forward]
Equity Method Investments	$ 34,254	18,133	18,133
Equity in Earnings			38,523
Distributions			(24,929)
Asset Transfer			2,527
Equity Method Investments			$ 34,254
Other Operating Income (Expense) [Member] | CNX Gathering LLC [Member]
Equity Method [Roll Forward]
Equity in Earnings		1,866
Other Operating Income (Expense) [Member] | CNXM [Member]
Equity Method [Roll Forward]
Equity in Earnings		10,072
Transportation, Gathering and Compression [Member] | CNX Gathering LLC [Member]
Equity Method [Roll Forward]
Equity in Earnings		253
Transportation, Gathering and Compression [Member] | CNXM [Member]
Equity Method [Roll Forward]
Equity in Earnings		$ 34,054

Segment Information (Details)

Segment Information (Details) - segment	3 Months Ended
	Mar. 31, 2018	Jan. 03, 2018	Dec. 14, 2017	Dec. 13, 2017
Segment Reporting Information [Line Items]
Number of principal business divisions	2
E&P Division [Member]
Segment Reporting Information [Line Items]
Number of reportable segments	4
Coal Division [Member]
Segment Reporting Information [Line Items]
Number of reportable segments	3
CNX Gathering LLC [Member]
Segment Reporting Information [Line Items]
Ownership percentage in equity method investment	50.00%	50.00%	50.00%	50.00%
Variable Interest Entity, Primary Beneficiary [Member]
Segment Reporting Information [Line Items]
Variable interest entity, ownership percentage	34.00%

Segment Information Industry Se

Segment Information Industry Segment Results (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017	Dec. 31, 2016
Segment Reporting Information [Line Items]
Natural Gas, NGLs and Oil Revenue	$ 405,623	$ 317,763
Purchased Gas Revenue	18,055	8,979
Midstream Revenue	26,254
(Loss) Gain on Commodity Derivative Instruments	35,087	(22,463)
Other Operating Income	10,710	15,650
Total Revenue and Other Operating Income	495,729	319,929
Earnings (Loss) From Continuing Operations Before Income Tax	759,240	(138,429)
Segment Assets	8,122,229	9,019,597	$ 6,931,913
Depreciation, Depletion and Amortization	124,667	95,678
Capital Expenditures	232,485	103,922
Revenues	495,729	319,929
Equity in Earnings	1,778	12,330	48,346
Investments in unconsolidated equity affiliates			$ 175,371	$ 169,208
Operating Segments [Member]
Segment Reporting Information [Line Items]
Equity in Earnings	1,778	12,330
Investments in unconsolidated equity affiliates	20,678	197,385
NJR Energy Services Company [Member]
Segment Reporting Information [Line Items]
Revenues	72,637	57,030
Direct Energy Business Marketing LLC [Member]
Segment Reporting Information [Line Items]
Revenues	57,907	46,366
Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Natural Gas, NGLs and Oil Revenue	0
Purchased Gas Revenue	0
Midstream Revenue	0
(Loss) Gain on Commodity Derivative Instruments	0
Other Operating Income	0
Total Revenue and Other Operating Income	0
Earnings (Loss) From Continuing Operations Before Income Tax	623,897
Segment Assets	102,668
Depreciation, Depletion and Amortization	0
Capital Expenditures	0
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Natural Gas, NGLs and Oil Revenue	0
Purchased Gas Revenue	0
Midstream Revenue	(37,924)
(Loss) Gain on Commodity Derivative Instruments	0
Other Operating Income	(81)
Total Revenue and Other Operating Income	(38,005)
Earnings (Loss) From Continuing Operations Before Income Tax	0
Segment Assets	(14,770)	0
Depreciation, Depletion and Amortization	0
Capital Expenditures	0
Operating Segments [Member]
Segment Reporting Information [Line Items]
Earnings (Loss) From Continuing Operations Before Income Tax	135,343	(135,176)
Operating Segments [Member] | Other Gas [Member]
Segment Reporting Information [Line Items]
Natural Gas, NGLs and Oil Revenue	12,784	16,294
Purchased Gas Revenue	18,055	8,979
Midstream Revenue	0
(Loss) Gain on Commodity Derivative Instruments	51,504	22,088
Other Operating Income	10,791	15,650
Total Revenue and Other Operating Income	93,134	63,011
Earnings (Loss) From Continuing Operations Before Income Tax	(13,657)	(186,560)
Operating Segments [Member] | Coalbed Methane [Member]
Segment Reporting Information [Line Items]
Natural Gas, NGLs and Oil Revenue	57,501	58,626
Purchased Gas Revenue	0	0
Midstream Revenue	0
(Loss) Gain on Commodity Derivative Instruments	(2,430)	(9,198)
Other Operating Income	0	0
Total Revenue and Other Operating Income	55,071	49,428
Earnings (Loss) From Continuing Operations Before Income Tax	13,117	3,608
Operating Segments [Member] | Utica Shale [Member]
Segment Reporting Information [Line Items]
Natural Gas, NGLs and Oil Revenue	130,322	53,668
Purchased Gas Revenue	0	0
Midstream Revenue	0
(Loss) Gain on Commodity Derivative Instruments	(4,474)	(2,688)
Other Operating Income	0	0
Total Revenue and Other Operating Income	125,848	50,980
Earnings (Loss) From Continuing Operations Before Income Tax	56,107	17,807
Operating Segments [Member] | Marcellus Shale [Member]
Segment Reporting Information [Line Items]
Natural Gas, NGLs and Oil Revenue	205,016	189,175
Purchased Gas Revenue	0	0
Midstream Revenue	0
(Loss) Gain on Commodity Derivative Instruments	(9,513)	(32,665)
Other Operating Income	0	0
Total Revenue and Other Operating Income	195,503	156,510
Earnings (Loss) From Continuing Operations Before Income Tax	44,242	29,969
E&P [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Natural Gas, NGLs and Oil Revenue	405,623	317,763
Purchased Gas Revenue	18,055	8,979
Midstream Revenue	0
(Loss) Gain on Commodity Derivative Instruments	35,087	(22,463)
Other Operating Income	10,791	15,650
Total Revenue and Other Operating Income	469,556	319,929
Earnings (Loss) From Continuing Operations Before Income Tax	99,809	(135,176)
Segment Assets	6,034,660	6,350,772
Depreciation, Depletion and Amortization	115,866	95,678
Capital Expenditures	216,508	103,922
CNXM [Member] | Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Natural Gas, NGLs and Oil Revenue		0
Purchased Gas Revenue		0
(Loss) Gain on Commodity Derivative Instruments		0
Other Operating Income		0
Total Revenue and Other Operating Income		0
Earnings (Loss) From Continuing Operations Before Income Tax		(3,253)
Segment Assets		2,668,825
Depreciation, Depletion and Amortization		0
Capital Expenditures		0
CNXM [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Natural Gas, NGLs and Oil Revenue	0
Purchased Gas Revenue	0
Midstream Revenue	64,178
(Loss) Gain on Commodity Derivative Instruments	0
Other Operating Income	0
Total Revenue and Other Operating Income	64,178
Earnings (Loss) From Continuing Operations Before Income Tax	35,534	0
Segment Assets	1,999,671	$ 0
Depreciation, Depletion and Amortization	8,801
Capital Expenditures	$ 15,977

Segment Information Reconciliat

Segment Information Reconciliation of Segment Information, Revenue and Other Operating Income (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Revenue, Major Customer [Line Items]
Total Segment Revenue from Contracts with External Customers	$ 405,623	$ 317,763
Gain (Loss) on Commodity Derivative Instruments	35,087	(22,463)
Other Operating Income	10,710	15,650
Total Consolidated Revenue and Other Operating Income	495,729	319,929
Operating Segments [Member]
Revenue, Major Customer [Line Items]
Total Segment Revenue from Contracts with External Customers	$ 449,932	$ 326,742

Segment Information Reconcili82

Segment Information Reconciliation of Segment Information, Income (Loss) From Continuing Operations Before Income Tax (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total Segment Income (Loss) Before Income Taxes for reportable business segments	$ 759,240	$ (138,429)
Other Income (Expense)	6,493	(4,075)
Gain on Sale of Assets	11,342	3,996
Loss on debt extinguishment	(15,635)	822
Income (Loss) From Continuing Operations Before Income Tax	759,240	(138,429)
Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total Segment Income (Loss) Before Income Taxes for reportable business segments	135,343	(135,176)
Income (Loss) From Continuing Operations Before Income Tax	135,343	(135,176)
Operating Segments [Member] | Marcellus Shale [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total Segment Income (Loss) Before Income Taxes for reportable business segments	44,242	29,969
Income (Loss) From Continuing Operations Before Income Tax	44,242	29,969
Operating Segments [Member] | Utica Shale [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total Segment Income (Loss) Before Income Taxes for reportable business segments	56,107	17,807
Income (Loss) From Continuing Operations Before Income Tax	56,107	17,807
Operating Segments [Member] | Coalbed Methane [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total Segment Income (Loss) Before Income Taxes for reportable business segments	13,117	3,608
Income (Loss) From Continuing Operations Before Income Tax	13,117	3,608
Operating Segments [Member] | Other Gas [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total Segment Income (Loss) Before Income Taxes for reportable business segments	(13,657)	(186,560)
Income (Loss) From Continuing Operations Before Income Tax	(13,657)	(186,560)
Corporate, Non-Segment [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total Segment Income (Loss) Before Income Taxes for reportable business segments	623,897
Other Income (Expense)	6,493	(4,075)
Gain on Sale of Assets	9,376	0
Gain on Previously Held Equity Interest	623,663	0
Loss on debt extinguishment	(15,635)	822
Income (Loss) From Continuing Operations Before Income Tax	623,897
Total E&P [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total Segment Income (Loss) Before Income Taxes for reportable business segments	99,809	(135,176)
Income (Loss) From Continuing Operations Before Income Tax	99,809	(135,176)
Midstream [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total Segment Income (Loss) Before Income Taxes for reportable business segments	35,534	0
Income (Loss) From Continuing Operations Before Income Tax	$ 35,534	0
Midstream [Member] | Corporate, Non-Segment [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total Segment Income (Loss) Before Income Taxes for reportable business segments		(3,253)
Income (Loss) From Continuing Operations Before Income Tax		$ (3,253)

Segment Information Reconcili83

Segment Information Reconciliation of Segment Information, Total Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017
ASSETS
Segment assets for total reportable business segments	$ 8,122,229	$ 6,931,913	$ 9,019,597
Items excluded from segment assets:
Recoverable income taxes	20,178	31,523
Total Consolidated Assets	8,122,229	$ 6,931,913	9,019,597
Intersegment Eliminations [Member]
ASSETS
Segment assets for total reportable business segments	(14,770)		0
Items excluded from segment assets:
Total Consolidated Assets	(14,770)		0
Segment Reconciling Items [Member]
Items excluded from segment assets:
Cash and other investments	82,490		53,766
Recoverable income taxes	20,178		121,243
Discontinued Operations	0		2,493,816
E&P [Member] | Operating Segments [Member]
ASSETS
Segment assets for total reportable business segments	6,034,660		6,350,772
Items excluded from segment assets:
Total Consolidated Assets	6,034,660		6,350,772
Midstream [Member] | Operating Segments [Member]
ASSETS
Segment assets for total reportable business segments	1,999,671		0
Items excluded from segment assets:
Total Consolidated Assets	$ 1,999,671		$ 0

Related Party Transaction (Deta

Related Party Transaction (Details) - CONSOL Energy [Member] - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Related Party Transaction [Line Items]
Due from related parties	$ 1,007	$ 12,540
Due to related parties	11,133	15,415
Total Current Liabilities [Member]
Related Party Transaction [Line Items]
Due to related parties	4,845	4,500
Total Deferred Credits and Other Liabilities [Member]
Related Party Transaction [Line Items]
Due to related parties	$ 6,288	$ 10,915

Stock Repurchase (Details)

Stock Repurchase (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Oct. 30, 2017	Sep. 30, 2017
Stock Repurchase [Abstract]
Stock repurchase program, authorized amount		$ 450,000	$ 200,000
Shares repurchased during period (in shares)	5,785,900
Shares repurchased, average price (in usd per share)	$ 14.49
Total value of shares repurchased	$ 83,963

Goodwill and Other Intangible86

Goodwill and Other Intangible Assets (Details) - USD ($)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Jan. 03, 2018	Dec. 31, 2017	Dec. 14, 2017	Dec. 13, 2017
Goodwill [Line Items]
Goodwill	$ 796,359,000			$ 0
Amortization expense	$ 1,922,000	$ 0
Useful life, customer relationship intangible assets	17 years
Midstream Acquisition [Member]
Goodwill [Line Items]
Goodwill			$ 796,359,000
Other intangible assets			$ 128,781,000
CNX Gathering LLC [Member]
Goodwill [Line Items]
Ownership percentage in equity method investment	50.00%		50.00%		50.00%	50.00%

Goodwill and Other Intangible87

Goodwill and Other Intangible Assets Changes in Carrying Amount of Goodwill (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2018USD ($)
Goodwill [Roll Forward]
December 31, 2017	$ 0
March 31, 2018	796,359
Midstream Acquisition [Member]
Goodwill [Roll Forward]
Acquisitions	$ 796,359

Goodwill and Other Intangible88

Goodwill and Other Intangible Assets Carrying Amount and Accumulated Amortization of Intangible Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Customer Relationships	$ 128,781	$ 0
Less: accumulated amortization for customer relationships	(1,922)	0
Total other intangible assets, net	$ 126,859	$ 0

Goodwill and Other Intangible89

Goodwill and Other Intangible Assets Estimated Future Annual Amortization Expense (Details) $ in Thousands	Mar. 31, 2018USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
Estimated annual amortization expense, Year 2019	$ 7,688
Estimated annual amortization expense, Year 2020	7,688
Estimated annual amortization expense, Year 2021	7,688
Estimated annual amortization expense, Year 2022	7,688
Estimated annual amortization expense, Year 2023	$ 7,688

Subsequent Events (Details)

Subsequent Events (Details) - Subsequent Event [Member]	May 02, 2018USD ($)wells
Subsequent Event [Line Items]
Proceeds from Asset Exchange Agreement | $	$ 7,000
Minimum commitment of wells | wells	40
Non-Core Midstream Assets, Dedicated Acreage, Surface Acreage [Member]
Subsequent Event [Line Items]
Ownership percentage	95.00%