CNX Resources (CNX) 10-Q2 May 172017 Q1 Quarterly reportFinancial data

Company Profile

Document and Entity Information

Document and Entity Information - shares	3 Months Ended
Document and Entity Information - shares	Mar. 31, 2017	Apr. 17, 2017
Document Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2017
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	Q1
Entity Registrant Name	CONSOL Energy Inc
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		230,049,173

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended
Consolidated Statements of Income - USD ($) $ in Thousands	Mar. 31, 2017	Mar. 31, 2016
Income Statement [Abstract]
Natural Gas, NGLs and Oil Sales	$ 317,763	$ 181,255
Unrealized Gain (Loss) on Commodity Derivatives	(22,463)	55,060
Coal Sales	316,448	226,164
Other Revenue, Net	13,053	7,766
Purchased Gas Sales	8,979	8,618
Freight-Outside	12,282	13,110
Other Income (including equity earnings)	40,696	48,131
Gain (Loss) on Sale of Assets	11,951	(7,276)
Total Revenue and Other Income	698,709	532,828
Oil and Gas Property, Lease Operating Expense	21,633	27,739
Gas Gathering, Transportation, Marketing and Processing Costs	94,332	93,974
Production Tax Expense	9,329	8,303
E&P Depreciation, Depletion, and Amortization	95,348	105,715
Exploration and Production Costs	9,786	1,747
Production Royalty Interests and Purchased Gas Costs	8,895	7,868
Other Expenses	17,930	22,798
Impairment of Oil and Gas Properties	137,865	0
Results of Operations, General and Administrative Related to Oil and Gas Producing Activities	21,490	22,458
Oil and Gas Production Expense	416,608	290,602
Operating Expenses	199,815	154,101
Coal Depreciation, Depletion, Amortization	42,301	41,266
Freight Expense	12,282	13,110
General and Administrative Expense	14,868	5,776
Cost of Coal Products and Services	269,266	214,253
Other Nonoperating Expense	43,200	35,339
Other General and Administrative Expense	2,211	1,853
Depreciation, Depletion and Amortization, Nonproduction	11,104	8,007
Gains (Losses) on Extinguishment of Debt	(822)	0
Interest Expense	44,433	49,865
Other General Expense	100,126	95,064
Total Costs	786,000	599,919
Income (Loss) from Continuing Operations before Income Taxes, Domestic	(87,291)	(67,091)
Income Tax Expense (Benefit)	(53,789)	(23,800)
Income (Loss) from Continuing Operations, Including Portion Attributable to Noncontrolling Interest	(33,502)	(43,291)
Income (Loss) from Continuing Operations Attributable to Parent	(38,966)	(44,405)
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent	0	(53,167)
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	(33,502)	(96,458)
Net Income (Loss) Attributable to Noncontrolling Interest	5,464	1,114
Net Income (Loss)	$ (38,966)	$ (97,572)

Consolidated Statements of Inc3

Consolidated Statements of Income Earnings Per Share - $ / shares	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Earnings Per Share [Abstract]
Income (Loss) from Continuing Operations, Per Basic Share	$ (0.17)	$ (0.19)
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share	0	(0.24)
Earnings Per Share, Basic	(0.17)	(0.43)
Income (Loss) from Continuing Operations, Per Diluted Share	(0.17)	(0.19)
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share	0	(0.24)
Earnings Per Share, Diluted	(0.17)	(0.43)
Common Stock, Dividends, Per Share, Cash Paid	$ 0	$ 0.01

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Condensed Statement of Income Captions [Line Items]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$ (33,502)	$ (96,458)
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	3,502	(2,484)
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net		(9,814)
Other Comprehensive Income (Loss), Net of Tax	3,502	(12,298)
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	(30,000)	(108,756)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Noncontrolling Interest	5,452	1,114
Income (Loss) from Continuing Operations, Including Portion Attributable to Noncontrolling Interest	(33,502)	(43,291)
Net Income (Loss) Attributable to Noncontrolling Interest	5,464	1,114
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract]
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	(35,452)	(109,870)
Consolidation, Eliminations [Member]
Condensed Statement of Income Captions [Line Items]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	8,486	66,215
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	(3,502)	2,484
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net		9,814
Other Comprehensive Income (Loss), Net of Tax	(3,502)	12,298
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	4,984	78,513
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Noncontrolling Interest	5,452	1,114
Income (Loss) from Continuing Operations, Including Portion Attributable to Noncontrolling Interest	8,486	66,215
Net Income (Loss) Attributable to Noncontrolling Interest	5,464	1,114
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract]
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	$ (468)	$ 77,399

Consolidated Statements of Com5

Consolidated Statements of Comprehensive Income (Parentheticals) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Other Comprehensive Income (Loss), Tax	$ (2,052)	$ (2,018)
Adjustment For Actuarially Determined Liabilities [Member]
Other Comprehensive Income (Loss), Tax	2,052	682
Cash Flow Hedging [Member]
Other Comprehensive Income (Loss), Tax	$ 0	$ 5,624

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Current Assets:
Cash and Cash Equivalents	$ 61,266	$ 60,475
Accounts and Notes Receivable:
Trade	215,329	220,222
Other Receivables, Net, Current	100,949	69,901
Inventories	69,618	65,461
Recoverable Income Taxes	124,555	116,851
Prepaid Expenses	44,498	93,146
Disposal Group, Including Discontinued Operation, Assets, Current	0	83
Total Current Assets	616,215	626,139
Property, Plant and Equipment:
Property, Plant and Equipment	13,518,261	13,771,388
Less-Accumulated Depreciation, Depletion and Amortization	5,695,342	5,630,949
Assets Held-for-sale, Long Lived, Fair Value Disclosure	163,622	0
Total Property, Plant and Equipment-Net	7,986,541	8,140,439
Other Assets:
Deferred Income Taxes	44,174	4,290
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	197,385	190,964
Other	219,454	222,149
Total Other Assets	461,013	417,403
Total Assets	9,063,769	9,183,981
Current Liabilities:
Accounts Payable	270,739	241,616
Current Portion of Long-Term Debt	11,851	12,000
Other Accrued Liabilities	704,367	680,348
Disposal Group, Including Discontinued Operation, Liabilities, Current	5,892	6,050
Total Current Liabilities	992,849	940,014
Long-Term Debt:
Long-Term Debt	2,620,698	2,722,995
Capital Lease Obligations	36,596	39,074
Total Long-Term Debt	2,657,294	2,762,069
Deferred Credits and Other Liabilities
Postretirement Benefits Other Than Pensions	656,890	659,474
Pneumoconiosis Benefits	107,792	108,073
Mine Closing	224,055	218,631
Gas Well Closing	224,588	223,352
Workers' Compensation	66,429	67,277
Salary Retirement	108,485	112,543
Other Liabilities, Noncurrent	119,048	151,660
Total Deferred Credits and Other Liabilities	1,507,287	1,541,010
TOTAL LIABILITIES	5,157,430	5,243,093
Stockholders' Equity:
Common Stock, $.01 Par Value; 500,000,000 Shares Authorized, 230,034,586 Issued and Outstanding at March 31, 2017; 229,443,008 Issued and Outstanding at December 31, 2016	2,304	2,298
Capital in Excess of Par Value	2,467,996	2,460,864
Preferred Stock, 15,000,000 shares authorized, None issued and outstanding	0	0
Retained Earnings	1,682,545	1,727,789
Accumulated Other Comprehensive Loss	(389,042)	(392,556)
Stockholders' Equity Attributable to Parent	3,763,803	3,798,395
Stockholders' Equity Attributable to Noncontrolling Interest	142,536	142,493
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	3,906,339	3,940,888
TOTAL LIABILITIES AND EQUITY	$ 9,063,769	$ 9,183,981

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parentheticals) - $ / shares	Mar. 31, 2017	Dec. 31, 2016
Common Stock [Member]
Common Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01
Common Stock, Shares Authorized	500,000,000	500,000,000
Common Stock, Shares, Issued	230,034,586	229,443,008
Common Stock, Shares, Outstanding	230,034,586	229,443,008
Treasury Stock, Shares	0	0
Preferred Stock [Member]
Preferred Stock, Shares Authorized	15,000,000	15,000,000
Preferred Stock, Shares Issued	0	0
Preferred Stock, Shares Outstanding	0	0

Consolidated Statements of Stoc

Consolidated Statements of Stockholders' Equity - 3 months ended Mar. 31, 2017 - USD ($) $ in Thousands	Total	Common Stock [Member]	Capital in Excess of Par Value [Member]	Retained Earnings (Deficit) [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Total CONSOL Energy Inc. Stockholders' Equity [Member]	Noncontrolling Interest [Member]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest at Dec. 31, 2016	$ 3,940,888	$ 2,298	$ 2,460,864	$ 1,727,789	$ (392,556)	$ 3,798,395	$ 142,493
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	(33,502)	0	0	(38,966)	0	(38,966)	5,464
Net Income (Loss)	(38,966)
Other Comprehensive Income (Loss), Net of Tax	3,502	0	0	0	3,514	3,514	(12)
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	(30,000)	0	0	(38,966)	3,514	(35,452)	5,452
Proceeds from Issuance of Common Stock	494	6	488	0	0	494	0
Stock Granted, Value, Share-based Compensation, Forfeited	(6,278)	0	0	(6,278)	0	(6,278)	0
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition	6,702	0	6,644	0	0	6,644	58
Noncontrolling Interest, Period Increase (Decrease)	(5,467)	0	0	0	0	0	(5,467)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest at Mar. 31, 2017	$ 3,906,339	$ 2,304	$ 2,467,996	$ 1,682,545	$ (389,042)	$ 3,763,803	$ 142,536

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$ (33,502)	$ (96,458)
Adjustments to Reconcile Net Income to Net Cash Provided By Operating Activities:
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent	0	53,167
Depreciation, Depletion and Amortization	148,753	154,988
Impairment of Oil and Gas Properties	137,865	0
Stock-Based Compensation	6,702	5,624
(Gain) Loss on Sale of Assets	(11,951)	7,276
Gains (Losses) on Extinguishment of Debt	(822)	0
Gain (Loss) on Hedging Activity	22,463	(55,060)
Increase (Decrease) Cash Collateral from Counterparties	(47,103)	84,331
Deferred Income Taxes	(41,936)	(23,582)
Equity in Earnings of Affiliates	(12,330)	(16,665)
Proceeds from Equity Method Investment, Dividends or Distributions, Return of Capital	0	4,512
Changes in Operating Assets:
Accounts and Notes Receivable	(27,908)	(14,833)
Inventories	(4,315)	(18,458)
Prepaid Expenses	870	18,980
Changes in Other Assets	936	(9,864)
Changes in Operating Liabilities:
Accounts Payable	4,016	(8,316)
Increase (Decrease) in Interest Payable, Net	34,411	35,867
Other Operating Liabilities	28,151	1,379
Changes in Other Liabilities	(10,036)	(3,313)
Other	10,930	4,087
Net Cash Provided by (Used in) Operating Activities, Continuing Operations	205,194	123,662
Cash Provided by (Used in) Operating Activities, Discontinued Operations	(75)	6,290
Net Cash Provided by Operating Activities	205,119	129,952
Investing Activities:
Capital Expenditures	(112,978)	(77,656)
Proceeds from Sale of Productive Assets	19,427	8,453
Net Investment in Equity Affiliates	5,909	(5,578)
Net Cash Provided by (Used in) Investing Activities, Continuing Operations	(87,642)	(74,781)
Cash Provided by (Used in) Investing Activities, Discontinued Operations	0	395,757
Net Cash Used in Investing Activities	(87,642)	320,976
Financing Activities:
(Payments on) Proceeds from Short-Term Borrowings	0	(100,500)
Payments on Miscellaneous Borrowings	(2,942)	(2,095)
Payments On Long Term Notes Including Redemption Premium	(98,243)	0
Net Proceeds from Revolver - MLP	(4,000)	15,000
Noncontrolling Interest, Period Increase (Decrease)	(5,467)	(5,413)
Dividends Paid	0	(2,294)
Proceeds from Issuance of Common Stock	494	3
Treasury Stock Activity	(6,278)	(1,510)
Debt Issuance and Financing Fees	(250)	0
Net Cash Provided by (Used in) Financing Activities, Continuing Operations	(116,686)	(96,809)
Cash Provided by (Used in) Financing Activities, Discontinued Operations	0	(47)
Net Cash (Used in) Provided by Financing Activities	(116,686)	(96,856)
Net Increase in Cash and Cash Equivalents	791	354,072
Cash and Cash Equivalents, at Carrying Value	60,475	72,574
Cash and Cash Equivalents at End of Period	$ 61,266	$ 426,646

Basis of Presentation

Basis of Presentation	3 Months Ended
Basis of Presentation	Mar. 31, 2017
BASIS OF PRESENTATION: [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, 2017 are not necessarily indicative of the results that may be expected for future periods. The Consolidated Balance Sheet at December 31, 2016 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, 2016 included in CONSOL Energy Inc.'s Annual Report on Form 10-K. Certain amounts in prior periods, primarily relating to discontinued operations, have been reclassified to conform with the report classifications of the year ended December 31, 2016, with no effect on previously reported net income or stockholders' equity. In March 2016, the Financial Accounting Standards Board (FASB) issued an Accounting Standards Update on stock compensation that intends to simplify and improve the accounting and statement of cash flow presentation for income taxes at settlement, forfeitures, and net settlements for withholding tax. The guidance is effective for public entities for fiscal years beginning after December 15, 2016. In accordance with this Update, $4,609 of additional income tax expense was recognized in the Consolidated Statements of Income for the three months ended March 31, 2017 . Also in accordance with this update, the value of shares withheld for employee tax withholding purposes of $6,278 and $1,510 for the three months ended March 31, 2017 and March 31, 2016, respectively, were reclassified between Net Cash Provided by Operating Activities and Net Cash Used in Financing Activities of the Consolidated Statements of Cash Flows. As permitted by this update, the Company has elected to account for forfeitures of stock compensation as they occur. The cumulative effect of the policy election to recognize forfeitures as they occur was immaterial. Basic earnings per share are computed by dividing net income attributable to CONSOL Energy Inc. ("CONSOL Energy" or the "Company") 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 table below sets forth the share-based awards that have been excluded from the computation of the diluted earnings per share because their effect would be anti-dilutive: For the Three Months Ended March 31, 2017 2016 Anti-Dilutive Options 5,472,165 5,365,686 Anti-Dilutive Restricted Stock Units 951,320 868,842 Anti-Dilutive Performance Share Units 1,762,690 113,531 Anti-Dilutive Performance Stock Options 802,804 802,804 8,988,979 7,150,863 The table below sets forth the share-based awards that have been exercised or released: For the Three Months Ended March 31, 2017 2016 Options 61,624 — Restricted Stock Units 334,040 484,680 Performance Share Units 560,936 — 956,600 484,680 The computations for basic and dilutive earnings per share are as follows: For the Three Months Ended March 31, 2017 2016 Numerator: Loss from Continuing Operations $ (33,502 ) $ (43,291 ) Less: Net Income Attributable to Non-Controlling Interest 5,464 1,114 Net Loss from Continuing Operations Attributable to CONSOL Energy Shareholders $ (38,966 ) $ (44,405 ) Loss from Discontinued Operations — (53,167 ) Net Loss Attributable to CONSOL Energy Shareholders $ (38,966 ) $ (97,572 ) Denominator: Weighted-average shares of common stock outstanding 229,817,169 229,259,228 Effect of dilutive shares — — Weighted-average diluted shares of common stock outstanding 229,817,169 229,259,228 Loss per Share: Basic (Continuing Operations) $ (0.17 ) $ (0.19 ) Basic (Discontinued Operations) — (0.24 ) Total Basic $ (0.17 ) $ (0.43 ) Dilutive (Continuing Operations) $ (0.17 ) $ (0.19 ) Dilutive (Discontinued Operations) — (0.24 ) Total Dilutive $ (0.17 ) $ (0.43 ) Changes in Accumulated Other Comprehensive Loss by component, net of tax, were as follows: Postretirement Benefits Balance at December 31, 2016 $ (392,556 ) Amounts Reclassified from Accumulated Other Comprehensive Loss 3,502 Add: Other Comprehensive Loss Attributable to Non-Controlling Interest 12 Balance at March 31, 2017 $ (389,042 ) The following table shows the reclassification of adjustments out of Accumulated Other Comprehensive Loss: For the Three Months Ended March 31, 2017 2016 Derivative Instruments (Note 12) Natural Gas Price Swaps and Options $ — $ (15,438 ) Tax Expense — 5,624 Net of Tax $ — $ (9,814 ) Actuarially Determined Long-Term Liability Adjustments* (Note 4 and Note 5) Amortization of Prior Service Costs $ (749 ) $ (148 ) Recognized Net Actuarial Loss 6,303 5,511 Total 5,554 5,363 Tax Benefit (2,052 ) (2,018 ) Net of Tax $ 3,502 $ 3,345

Discontinued Operations (Notes)

Discontinued Operations (Notes)	3 Months Ended
Discontinued Operations (Notes)	Mar. 31, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal Groups, Including Discontinued Operations, Disclosure [Text Block]	DISCONTINUED OPERATIONS: In August 2016, CONSOL Energy completed the sale of its Miller Creek and Fola Mining Complex subsidiaries. In the transaction, the buyer acquired the Miller Creek and Fola assets and assumed the Miller Creek and Fola mine closing and reclamation liabilities. In order to equalize the value exchange, CONSOL Energy paid $28,271 of cash at closing, which included property taxes associated with the properties sold and other closing costs (a portion of which will be held in escrow for purposes of obtaining the surety bonds required for the permits to transfer). CONSOL Energy will also pay a total of $13,700 in remaining installments over the next three years ending in January 2020. In March 2016, CONSOL Energy completed the sale of its membership interests in CONSOL Buchanan Mining Company, LLC (BMC), which owned and operated the Buchanan Mine located in Mavisdale, Virginia; various assets relating to the Amonate Mining Complex located in Amonate, Virginia; Russell County, Virginia coal reserves and Pangburn Shaner Fallowfield coal reserves located in Southwestern, Pennsylvania to Coronado IV LLC ("Coronado"). Various CONSOL Energy assets were excluded from the sale including coalbed methane, natural gas and minerals other than coal, current assets of BMC, certain coal seams, certain surface rights, and the Amonate Preparation Plant. Coronado assumed only specified liabilities and various CONSOL Energy liabilities were excluded and not assumed. The excluded liabilities included BMC’s indebtedness, trade payables and liabilities arising prior to closing, as well as the liabilities of the subsidiaries other than BMC which are parties to the sale. In addition, the buyer agreed to pay CONSOL Energy for Buchanan Mine coal sold outside the U.S. and Canada during the five years following closing a royalty of 20% of any excess of the gross sales price per ton over the following amounts: (1) year one, $75.00 per ton; (2) year two, $78.75 per ton; (3) year three, $82.69 per ton; (4) year four, $86.82 per ton; (5) year five, $91.16 per ton. Total royalty income recognized under the year one agreement was $5,262 and was included in Miscellaneous Other Income on the Consolidated Statement of Income for the three months March 31, 2017. At closing, the parties entered into several agreements including, among others, agreements relating to the coordination and conduct of gas operations at the mines, an option to purchase the Amonate Preparation Plant and transition services. Cash proceeds of $402,799 were received at closing and are included in Net Cash Provided by Discontinued Investing Activities on the Consolidated Statements of Cash Flows for the three months ended March 31, 2016. The net loss on the sale was $38,364 and was included in Loss from Discontinued Operations, net on the Consolidated Statements of Income for the three months ended March 31, 2016. For all periods presented in the accompanying Consolidated Statements of Income, BMC along with the various other assets and the Miller Creek and Fola Mining Complexes are classified as 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 2016 Coal Sales $ — $ 76,519 Freight-Outside Coal — 1,012 Miscellaneous Other Income — 43 Loss on Sale of Assets — (38,364 ) Total Revenue and Other Income $ — $ 39,210 Total Costs — 88,066 Loss From Operations Before Income Taxes $ — $ (48,856 ) Income Tax Expense — 4,311 Loss From Discontinued Operations, net $ — $ (53,167 ) The following table details the major classes of assets and liabilities of discontinued operations: March 31, December 31, Assets: Accounts Receivable - Trade $ — $ 83 Total Current Assets $ — $ 83 Total Assets of Discontinued Operations $ — $ 83 Liabilities: Accounts Payable $ — $ 36 Other Current Liabilities 5,892 6,014 Total Current Liabilities $ 5,892 $ 6,050 Total Liabilities of Discontinued Operations $ 5,892 $ 6,050

Other Income (Notes)

Other Income (Notes)	3 Months Ended
Other Income (Notes)	Mar. 31, 2017
Component of Operating Income [Abstract]
Other Income and Other Expense Disclosure [Text Block]	For the Three Months Ended March 31, 2017 2016 Equity in Earnings of Affiliates - CONE $ 11,938 $ 14,351 Rental Income 8,842 9,196 Royalty Income - Non-Operated Coal 8,785 2,230 Purchased Coal Sales 3,541 — Gathering Revenue 3,153 2,748 Interest Income 1,543 214 Right of Way Issuance 1,001 15,733 Equity in Earnings of Affiliates - Other 392 2,314 Other 1,501 1,345 Miscellaneous Other Income $ 40,696 $ 48,131

Pension and OPEB - Periodic Cos

Pension and OPEB - Periodic Cost	3 Months Ended
Pension and OPEB - Periodic Cost	Mar. 31, 2017
PENSION AND OTHER POSTRETIREMENT BENEFIT PLANS NET PERIODIC BENEFIT COSTS: [Abstract]
Components of Pension and Other Postretirement Benefit Plans:	COMPONENTS OF PENSION AND OTHER POST-EMPLOYMENT BENEFIT (OPEB) PLANS NET PERIODIC BENEFIT COSTS: Components of Net Periodic Benefit (Credit) Cost are as follows: Pension Benefits Other Post-Employment Benefits For the Three Months Ended March 31, For the Three Months Ended March 31, 2017 2016 2017 2016 Service Cost $ 846 $ 482 $ — $ — Interest Cost 6,428 6,841 5,986 6,060 Expected Return on Plan Assets (10,596 ) (11,869 ) — — Amortization of Prior Service Credits (148 ) (147 ) (601 ) — Recognized Net Actuarial Loss 2,351 2,116 5,778 4,792 Net Periodic Benefit (Credit) Cost $ (1,119 ) $ (2,577 ) $ 11,163 $ 10,852

CWP and Workers Comp - Net Peri

CWP and Workers Comp - Net Periodic Costs	3 Months Ended
CWP and Workers Comp - Net Periodic Costs	Mar. 31, 2017
CWP And Workers Comp Net Periodic Cost [Abstract]
Coal Workers' Pneumoconiosis (CWP) and Workers' Compensation:	COMPONENTS OF COAL WORKERS’ PNEUMOCONIOSIS (CWP) AND WORKERS’ COMPENSATION NET PERIODIC BENEFIT COSTS: Components of Net Periodic Benefit Cost (Credit) are as follows: CWP Workers' Compensation For the Three Months Ended March 31, For the Three Months Ended March 31, 2017 2016 2017 2016 Service Cost $ 1,129 $ 1,204 $ 1,463 $ 1,904 Interest Cost 1,013 1,123 592 638 Amortization of Actuarial Gain (1,908 ) (1,383 ) (153 ) (101 ) Administrative Fees 151 — 138 — State Administrative Fees and Insurance Bond Premiums — — 799 731 Curtailment Gain — (1,307 ) — — Net Periodic Benefit Cost (Credit) $ 385 $ (363 ) $ 2,839 $ 3,172 Income attributable to discontinued operations included in the CWP net periodic credit above was $1,290 for the three months ended March 31, 2016 and was included in Loss from Discontinued Operations, net on the Consolidated Statements of Income. On March 31, 2016, CONSOL Energy completed the sale of its membership interests in BMC (See Note 2 - Discontinued Operations). As a result of the sale, certain obligations of the CWP plan were transferred to the buyer. This transfer triggered a curtailment gain of $1,307 which was included in Loss from Discontinued Operations, net on the Consolidated Statements of Income. The curtailment resulted in a plan remeasurement which increased the plan liabilities by $7,713 at March 31, 2016.

Income Taxes

Income Taxes	3 Months Ended
Income Taxes	Mar. 31, 2017
Income Tax Disclosure [Abstract]
Income Taxes	INCOME TAXES: The effective tax rate for the three months ended March 31, 2017 and 2016 was 58.0% and 34.9% , respectively. The effective tax rate for the three months ended March 31, 2017 differs from the U.S. federal statutory rate of 35% primarily due to the income tax benefit for excess percentage depletion. The effective tax rate for the three months ended March 31, 2016 differs from the U.S. federal statutory rate primarily due to the income tax benefit for excess percentage depletion, partially offset by a charge to record a state valuation allowance resulting from the Buchanan sale. The total amount of uncertain tax positions at March 31, 2017 and December 31, 2016 was $9,103 . If these uncertain tax positions were recognized, approximately $666 would affect CONSOL Energy's effective tax rate at March 31, 2017 and December 31, 2016 . There was no change to the unrecognized tax benefits during the three months ended March 31, 2017 . CONSOL Energy recognizes accrued interest related to uncertain tax positions in interest expense. As of March 31, 2017 and December 31, 2016 , the Company reported an accrued interest liability relating to uncertain tax positions of $385 and $305 , respectively, in Other Liabilities on the Consolidated Balance Sheets. The accrued interest liability includes $80 of accrued interest expense that is reflected in the Company's Consolidated Statements of Income for the three months ended March 31, 2017 . CONSOL Energy recognizes penalties accrued related to uncertain tax positions in its income tax expense. As of March 31, 2017 and December 31, 2016 , CONSOL Energy had no accrued liabilities for tax penalties related to uncertain tax positions. CONSOL Energy 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 2010. The Company expects the Joint Committee on Taxation to conclude its review of the audit of tax years 2010 through 2014 in the third quarter of 2017.

Inventories

Inventories	3 Months Ended
Inventories	Mar. 31, 2017
Inventory Disclosure [Abstract]
Inventories	INVENTORIES: Inventory components consist of the following: March 31, December 31, Coal $ 12,626 $ 7,800 Supplies 56,992 57,661 Total Inventories $ 69,618 $ 65,461 Inventories are stated at the lower of cost or net realizable value. The cost of coal inventories is determined by the first-in, first-out (FIFO) method. Coal inventory costs include labor, supplies, equipment costs, operating overhead, depreciation, depletion and amortization, and other related costs. The cost of supplies inventory is determined by the average cost method and includes operating and maintenance supplies to be used in the Company's E&P and coal operations.

Property, Plant and Equipment

Property, Plant and Equipment	3 Months Ended
Property, Plant and Equipment	Mar. 31, 2017
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment	PROPERTY, PLANT AND EQUIPMENT: March 31, December 31, E&P Property, Plant and Equipment Intangible drilling cost $ 3,465,645 $ 3,583,565 Proved gas properties 1,982,134 2,016,916 Unproved gas properties 1,045,437 1,116,282 Gas gathering equipment 1,127,614 1,138,299 Gas wells and related equipment 763,248 791,996 Other gas assets 189,481 190,406 Gas advance royalties 13,186 13,762 Total E&P Property, Plant and Equipment $ 8,586,745 $ 8,851,226 Less: Accumulated Depreciation, Depletion and Amortization 3,126,778 3,106,296 Total E&P Property, Plant and Equipment - Net $ 5,459,967 $ 5,744,930 PA Mining Operations Property, Plant and Equipment Coal and other plant and equipment $ 2,318,308 $ 2,307,668 Coal properties and surface lands 458,976 458,398 Airshafts 372,656 371,752 Mine development 326,152 326,152 Coal advance mining royalties 16,108 16,224 Leased coal lands 26,556 26,566 Total PA Mining Operations and Other Property, Plant and Equipment $ 3,518,756 $ 3,506,760 Less: Accumulated Depreciation, Depletion and Amortization 1,810,108 1,768,712 Total PA Mining Operations and Other Property, Plant and Equipment - Net $ 1,708,648 $ 1,738,048 Other Property, Plant and Equipment Coal and other plant and equipment 531,692 532,919 Coal properties and surface lands 481,037 481,126 Airshafts 10,002 10,003 Mine development 17,988 17,988 Coal advance mining royalties 311,205 310,530 Leased coal lands 60,836 60,836 Total Other Property, Plant and Equipment $ 1,412,760 $ 1,413,402 Less: Accumulated Depreciation, Depletion and Amortization 758,456 755,941 Total Other Property, Plant and Equipment - Net $ 654,304 $ 657,461 Total Company Property, Plant and Equipment - Continuing Operations $ 13,518,261 $ 13,771,388 Less - Total Company Accumulated Depreciation, Depletion and Amortization 5,695,342 5,630,949 Total Company Property, Plant and Equipment - Held for Sale - Net 163,622 — Total Property, Plant and Equipment of Continuing Operations - Net $ 7,986,541 $ 8,140,439 Property, Plant and Equipment Held for Sale In February 2017, the Company approved a plan to sell subsidiaries Knox Energy LLC and Coalfield Pipeline Company (“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 will have a major effect on the Company’s operations and financial results and is, 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 is to be 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 Other Gas segment of the Consolidated Statements of Income. The sale of Knox closed in the second quarter of 2017 (see Note 18 Subsequent Events for additional information). In March 2017, the Company approved a plan to sell approximately 6,300 net undeveloped acres of the Utica-Point Pleasant Shale in Jefferson, Belmont and Guernsey counties, Ohio. This transaction closed in the second quarter of 2017 (see Note 18 Subsequent Events for additional information). Additionally, a plan to sell 12 producing wells, 15 DUCs, and approximately 15,500 net developed and undeveloped acres in Doddridge and Wetzel Counties in West Virginia was approved. These assets met all of the criteria to be classified as held for sale in the first quarter of 2017. The potential disposal of these assets did not represent a strategic shift that will have a major effect on the Company’s operations and financial results and is, 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 Company determined that the approximate fair value less costs to sell exceeded the carrying value of the net assets and thus no impairment charge was recorded. The final sale of these assets will be subject to our ability to negotiate acceptable terms and conditions and the Company anticipates completing the sale of these assets before year-end. Industry Participation Agreements CONSOL Energy had two significant industry participation agreements (referred to as "joint ventures" or "JVs") that provided drilling and completion carries for the Company's retained interests. CNX Gas Company is party to a joint development agreement with Hess Ohio Developments, LLC (Hess) with respect to approximately 155 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 CONSOL Energy working interest obligations as the acreage is developed. As of December 31, 2016, Hess' entire carry obligation has been met. CNX Gas Company was party to a joint development agreement with Noble Energy, Inc. (Noble) with respect to approximately 700 thousand net Marcellus Shale oil and gas acres in West Virginia and Pennsylvania, in which each party owned a 50% undivided interest. On October 29, 2016, CNX Gas entered into an Exchange Agreement with Noble Energy, which terminated the joint development agreement related to the jointly owned gas assets held in connection with the joint venture with Noble and divided such jointly owned gas assets among CNX Gas and Noble Energy. The transactions contemplated by the Exchange Agreement were closed on December 1, 2016 with an effective date of October 1, 2016. As part of the exchange: each party now owns and operates a 100% interest in properties and wells in two separate operating areas; each party has independent control and flexibility with respect to the scope and timing of future development over its operating area; and all acreage operated by CONSOL Energy and Noble Energy, Inc. in their respective operating areas will remain fully dedicated to CONE Midstream Partners LP. The exchange was accounted for as a mineral conveyance, thus no gain or loss was recorded in connection with the transaction.

Short-Term Notes Payable

Short-Term Notes Payable	3 Months Ended
Short-Term Notes Payable	Mar. 31, 2017
Short-term Debt, Other Disclosures [Abstract]
Short-Term Notes Payable:	SHORT-TERM NOTES PAYABLE: CONSOL Energy's senior secured credit agreement expires on June 18, 2019. The credit facility allows for up to $ 2,000,000 of borrowings, which includes a $ 750,000 letters of credit sub-limit. CONSOL Energy can also request an additional $ 500,000 increase in the aggregate borrowing limit amount. The facility is secured by substantially all of the assets of CONSOL Energy 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 CONSOL Energy's proved natural gas reserves. The current facility contains a number of affirmative and negative covenants that limit the Company's ability to dispose of assets, make investments, purchase or redeem CONSOL Energy common stock, pay dividends, merge with another corporation and amend, modify or restate the senior unsecured notes. In April 2016, the facility was amended to require that the Company must: (i) prepay outstanding loans under the revolving credit facility to the extent that cash on hand exceeds $150,000 for two consecutive business days; (ii) mortgage 85% of its proved reserves and 80% of its proved developed producing reserves, in each case, which are included in the borrowing base; (iii) maintain applicable deposit, securities and commodities accounts with the lenders or affiliates thereof; and (iv) enter into control agreements with respect to such applicable accounts. In addition, the Company pledged the equity interest it holds in CONE Gathering, LLC, and CONE Midstream Partners, LP as collateral to secure loans under the credit agreement. The facility also requires that CONSOL Energy maintain a minimum interest coverage ratio of no less than 2.50 to 1.00, which is calculated as the ratio of Adjusted EBITDA to cash interest expense of CONSOL Energy and certain of its subsidiaries, measured quarterly. CONSOL Energy 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. At March 31, 2017 , the interest coverage ratio was 3.94 to 1.00 and the current ratio was 2.41 to 1.00. Further, the credit facility allows unlimited investments in joint ventures for the development and operation of natural gas gathering systems and permits CONSOL Energy to separate its E&P and coal businesses if the leverage ratio (which is, essentially, the ratio of debt to EBITDA) of the E&P business immediately after the separation would not be greater than 2.75 to 1.00. The calculation of all of the ratios exclude CNX Coal Resources LP ("CNXC"). At March 31, 2017 , the $2,000,000 facility had no borrowings outstanding and $ 333,322 of letters of credit outstanding, leaving $ 1,666,678 of unused capacity. At December 31, 2016 , the $2,000,000 facility had no borrowings outstanding and $ 325,676 of letters of credit outstanding, leaving $ 1,674,324 of unused capacity.

Long-Term Debt

Long-Term Debt	3 Months Ended
Long-Term Debt	Mar. 31, 2017
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 $1,750,044 and $1,850,000 plus Unamortized Premium of $4,266 and $4,731, respectively) $ 1,754,310 $ 1,854,731 Senior Notes due April 2023 at 8.00% (Principal of $500,000 less Unamortized Discount of $5,430 and $5,656, respectively) 494,570 494,344 Revolving Credit Facility - CNX Coal Resources LP 197,000 201,000 MEDCO Revenue Bonds in Series due September 2025 at 5.75% 102,865 102,865 Senior Notes due April 2020 at 8.25%, Issued at Par Value 74,470 74,470 Senior Notes due March 2021 at 6.375%, Issued at Par Value 20,611 20,611 Advance Royalty Commitments (7.73% Weighted Average Interest Rate) 2,678 2,678 Other Long-Term Note Maturing in 2018 (Principal of $1,431 and $1,789 less Unamortized Discount of $78 and $117, respectively) 1,353 1,672 Less: Unamortized Debt Issuance Costs 25,499 27,699 2,622,358 2,724,672 Less: Amounts Due in One Year* 1,660 1,677 Long-Term Debt $ 2,620,698 $ 2,722,995 * Excludes current portion of Capital Lease Obligations of $10,191 and $ 10,323 at March 31, 2017 and December 31, 2016 , respectively.

Commitments and Contingencies

Commitments and Contingencies	3 Months Ended
Commitments and Contingencies	Mar. 31, 2017
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	COMMITMENTS AND CONTINGENT LIABILITIES: CONSOL Energy 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. CONSOL Energy 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 CONSOL Energy. 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 CONSOL Energy; however, such amounts cannot be reasonably estimated. The amount claimed against CONSOL Energy is disclosed below when an amount is expressly stated in the lawsuit or claim, which is not often the case. The maximum aggregate amount claimed in those lawsuits and claims, regardless of probability, where a claim is expressly stated or can be estimated, exceeds the aggregate amounts accrued for all lawsuits and claims by approximately $549,758 . 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 Company 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 Company appealed the Order to the U.S. Fourth Circuit Court of Appeals. On August 19, 2014, the Fourth Circuit agreed with CNX Gas Company, 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 seeking review of the Order and on April 24, 2017, Plaintiffs filed its answer to the Petition. CONSOL Energy continues to believe this action cannot properly proceed as a class action in any form, believes the case has meritorious defenses, and intends to defend it vigorously. The Company has established an accrual to cover its estimated liability for this case. This accrual is immaterial to the overall financial position of CONSOL Energy 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 Company 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 Company appealed the Order to the U.S. Fourth Circuit Court of Appeals. On August 19, 2014, the Fourth Circuit agreed with CNX Gas Company, 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. CONSOL Energy believes the case has meritorious defenses, and intends to defend it vigorously. The Company has established an accrual to cover its estimated liability for this case. This accrual is immaterial to the overall financial position of CONSOL Energy and is included in Other Accrued Liabilities on the Consolidated Balance Sheets. The following royalty, land rights and other lawsuits and claims include those for which a loss is reasonably possible, but not probable, and accordingly, an accrual has not been recognized. These claims are influenced by many factors which prevent the estimation of a range of potential loss. These factors include, but are not limited to, generalized allegations of unspecified damages (such as improper deductions), discovery having not commenced or not having been completed, unavailability of expert reports on damages and non-monetary issues being tried. For example, in instances where a gas lease termination is sought, damages would depend on speculation as to if and when the gas production would otherwise have occurred, how many wells would have been drilled on the lease premises, what their production would be, what the cost of production would be, and what the price of gas would be during the production period. An estimate is calculated, if applicable, when sufficient information becomes available. Fitzwater Litigation: Three nonunion retired coal miners have sued CONSOL Energy Inc., Fola Coal Company, Consolidation Coal Company and CONSOL of Kentucky Inc. (COK) in West Virginia Federal Court alleging ERISA violations in the termination of retiree health care benefits. The Plaintiffs contend they relied to their detriment on oral statements and promises of "lifetime health benefits" allegedly made by various members of management during Plaintiffs' employment and that they were allegedly denied access to Summary Plan Documents that clearly reserved to the Company the right to modify or terminate the CONSOL Energy Inc. Retiree Health and Welfare Plan. Pursuant to plaintiffs amended complaint filed on April 24, 2017, plaintiffs request that retiree health benefits be reinstated and seek to represent a class of all nonunion retirees who were associated with AMVEST and COK areas of operation.The Company believes it has meritorious defense and intends to vigorously defend this suit. Virginia Mine Void Litigation: The Company is currently defending three lawsuits naming Consolidation Coal Company (CCC), Island Creek Coal Company (ICCC), CNX Gas Company, and/or CONSOL Energy. The lawsuits are pending in the U.S. District Court for the Western District of Virginia. On October 26, 2015, the trial court granted summary judgment in favor of the defendants in two of the actions upon its finding that plaintiffs' claims are barred by the applicable statutes of limitation. Plaintiffs appealed both cases to the U.S. Court of Appeals for the Fourth Circuit. On March 9, 2017, the Fourth Circuit affirmed and entered judgment in favor of the CONSOL entities. As a direct result of the Fourth Circuit action, Motions for Voluntary Dismissal have been, or shortly will be, filed in both of the two remaining cases. On January 26, 2016, six mine void lawsuits that have twice before been filed and voluntarily dismissed, were refiled for a third time in state court but have not been served. Under these procedural circumstances, these actions should no longer be viable under federal or Virginia state law. At March 31, 2017 , CONSOL Energy 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 financial guarantees and letters of credit are recorded as liabilities in the financial statements. CONSOL Energy management believes that these guarantees will expire without being funded, and therefore the commitments 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: Employee-Related $ 84,086 $ 64,783 $ 19,303 $ — $ — Environmental 998 398 600 — — Other 248,238 247,266 972 — — Total Letters of Credit 333,322 312,447 20,875 — — Surety Bonds: Employee-Related 112,560 79,680 32,880 — — Environmental 516,349 475,312 41,037 — — Other 20,179 19,275 903 1 — Total Surety Bonds 649,088 574,267 74,820 1 — Guarantees: Other 41,554 10,737 17,067 12,821 929 Total Guarantees 41,554 10,737 17,067 12,821 929 Total Commitments $ 1,023,964 $ 897,451 $ 112,762 $ 12,822 $ 929 Included in the above table are commitments and guarantees entered into in conjunction with the sale of Consolidation Coal Company and certain of its subsidiaries, which contain all five of its longwall coal mines in West Virginia, and its river operations to a subsidiary of Murray Energy Corporation (Murray Energy). As part of the sales agreement, CONSOL Energy has guaranteed certain equipment lease obligations and coal sales agreements that were assumed by Murray Energy. In the event that Murray Energy would default on the obligations defined in the agreements, CONSOL Energy would be required to perform under the guarantees. If CONSOL Energy would be required to perform, the stock purchase agreement provides various recourse actions. At March 31, 2017 and December 31, 2016, the fair value of these guarantees was $1,285 and $1,362 , respectively, and is included in Other Accrued Liabilities on the Consolidated Balance Sheets. The fair value of certain of the guarantees was determined using CONSOL Energy’s risk-adjusted interest rate. Significant increases or decreases in the risk-adjusted interest rates may result in a significantly higher or lower fair value measurement. Coal sales agreement guarantees were valued based on an evaluation of coal market pricing compared to contracted sales price and includes an adjustment for nonperformance risk. No other amounts related to financial guarantees and letters of credit are recorded as liabilities in the financial statements. Significant judgment is required in determining the fair value of these guarantees. The guarantees of the leases and sales agreements are classified within Level 3 of the fair value hierarchy. As part of the sale of the Buchanan Mine (See Note 2 - Discontinued Operations), CONSOL Energy has guaranteed certain equipment lease obligations that were assumed by Coronado. In the event that Coronado would default on the obligations defined in the agreements, CONSOL Energy would be required to perform under the guarantees. CONSOL Energy regularly evaluates the likelihood of default for all guarantees based on an expected loss analysis and records the fair value, if any, of its guarantees as an obligation in the consolidated financial statements. CONSOL Energy and CNX Gas Company enter 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, 2017 , the purchase obligations for each of the next five years and beyond were as follows: Obligations Due Amount Less than 1 year $ 204,580 1 - 3 years 280,593 3 - 5 years 243,595 More than 5 years 598,135 Total Purchase Obligations $ 1,326,903

Derivative Instruments

Derivative Instruments	3 Months Ended
Derivative Instruments	Mar. 31, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments:	DERIVATIVE INSTRUMENTS: CONSOL Energy 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. CONSOL Energy 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 CONSOL Energy to post collateral for any of its positions. However, as stated in the counterparty master agreements, if CONSOL Energy'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, CONSOL Energy 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. CONSOL Energy recognizes all financial derivative instruments as either assets or liabilities at fair value on the Consolidated Balance Sheets on a gross basis. Each of CONSOL Energy's counterparty master agreements allows, in the event of default, the ability to elect early termination of outstanding contracts. If early termination is elected, CONSOL Energy and the applicable counterparty would net settle all open hedge positions. The total notional amounts of production of CONSOL Energy's derivative instruments at March 31, 2017 and December 31, 2016 were as follows: March 31, December 31, Forecasted to 2017 2016 Settle Through Natural Gas Commodity Swaps (Bcf) 819.1 744.7 2021 Natural Gas Basis Swaps (Bcf) 476.8 482.0 2021 Propane Commodity Swaps (Mbbls) — 126.0 — The gross fair value of CONSOL Energy's derivative instruments at March 31, 2017 and December 31, 2016 was as follows: Asset Derivative Instruments Liability Derivative Instruments March 31, December 31, March 31, December 31, 2017 2016 2017 2016 Commodity Swaps: Prepaid Expense $ 6,408 $ 16 Other Accrued Liabilities $ 122,747 $ 209,980 Other Assets 58,422 29,596 Other Liabilities 25,838 67,139 Total Asset $ 64,830 $ 29,612 Total Liability $ 148,585 $ 277,119 Basis Only Swaps: Prepaid Expense $ 2,745 $ 56,916 Other Accrued Liabilities $ 70,281 $ 21,593 Other Assets 12,722 35,603 Other Liabilities 24,946 11,575 Total Asset $ 15,467 $ 92,519 Total Liability $ 95,227 $ 33,168 The effect of derivative instruments on CONSOL Energy's Consolidated Statements of Income was as follows: For the Three Months Ended March 31, 2017 2016 Cash (Paid) Received in Settlement of Commodity Derivative Instruments: Commodity Swaps: Natural Gas $ (24,607 ) $ 82,146 Propane (1,216 ) — Natural Gas Basis Swaps (21,280 ) 2,185 Total Cash (Paid) Received in Settlement of Commodity Derivative Instruments (47,103 ) 84,331 Unrealized Gain (Loss) on Commodity Derivative Instruments: Commodity Swaps: Natural Gas 162,604 (38,023 ) Propane 1,147 (265 ) Natural Gas Basis Swaps (139,111 ) (6,421 ) Reclassified from Accumulated OCI — 15,438 Total Unrealized Gain (Loss) on Commodity Derivative Instruments 24,640 (29,271 ) (Loss) Gain on Commodity Derivative Instruments: Commodity Swaps: Natural Gas 137,997 44,123 Propane (69 ) (265 ) Natural Gas Basis Swaps (160,391 ) (4,236 ) Reclassified from Accumulated OCI — 15,438 Total (Loss) Gain on Commodity Derivative Instruments $ (22,463 ) $ 55,060 Changes in Accumulated OCI, net of tax, attributable to cash flow hedges that were de-designated at December 31, 2014 were as follows: For the Three Months Ended March 31, 2017 2016 Beginning Balance – Accumulated OCI $ — $ 43,470 Less: Gain Reclassified from Accumulated OCI (Net of tax: $5,624) — (9,814 ) Ending Balance – Accumulated OCI $ — $ 33,656 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
Fair Value of Financial Instruments	Mar. 31, 2017
Fair Value Disclosures [Abstract]
Fair Value of Financial Instruments	FAIR VALUE OF FINANCIAL INSTRUMENTS: CONSOL Energy 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. The significant unobservable inputs used in the fair value measurement of the Company's third-party guarantees are the credit risk of the third-party and the third-party surety bond markets. A significant increase or decrease in these values, in isolation, would have a directionally similar effect resulting in higher or lower fair value measurement of the Company's Level 3 guarantees. 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, 2017 Fair Value Measurements at December 31, 2016 Description (Level 1) (Level 2) (Level 3) (Level 1) (Level 2) (Level 3) Gas Derivatives $ — $ (163,515 ) $ — $ — $ (188,156 ) $ — Murray Energy Guarantees $ — $ — $ (1,285 ) $ — $ — $ (1,362 ) 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, 2017 December 31, 2016 Carrying Amount Fair Value Carrying Amount Fair Value Cash and Cash Equivalents $ 61,266 $ 61,266 $ 60,475 $ 60,475 Long-Term Debt $ 2,647,857 $ 2,628,205 $ 2,752,371 $ 2,717,582

Segment Information

Segment Information	3 Months Ended
Segment Information	Mar. 31, 2017
Segment Reporting Information [Line Items]
Segment Reporting Disclosure [Text Block]	SEGMENT INFORMATION: CONSOL Energy consists of two principal business divisions: Exploration and Production (E&P) and Pennsylvania (PA) Mining Operations. 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 and the Chattanooga Shale in Tennessee, neither of which are 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, other corporate expenses, selling, general and administrative activities, as well as various other activities assigned to the E&P division but not allocated to each individual segment. The principal activities of the PA Mining Operations division are mining, preparation and marketing of thermal coal, sold primarily to power generators. It also includes selling, general and administrative activities, as well as various other activities assigned to the PA Mining Operations division. CONSOL Energy’s Other division includes expenses from various corporate and diversified business activities that are not allocated to the E&P or PA Mining Operations divisions. The diversified business activities include coal terminal operations, closed and idle mine activities, water operations, selling, general and administrative activities, as well as various other non-operated activities, none of which are individually significant to the Company. Prior to the sale of the Buchanan Mine on March 31, 2016 and the Miller Creek and Fola Complexes on August 1, 2016 (see Note 2 - Discontinued Operations), CONSOL Energy 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. PA Operations now constitutes its own division and reportable segment, and the remaining activity in the Other Coal segment became part of CONSOL Energy's diversified business activities in the Other division. The prior period has been reclassified to align with the current period presentation. 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 CONSOL Energy, 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
Related Party Transaction	Mar. 31, 2017
NOTE 16- RELATED PARTY TRANSACTIONS [Abstract]
Related Party Transactions Disclosure [Text Block]	RELATED PARTY TRANSACTIONS: CONE Gathering LLC and CONE Midstream Partners LP In September 2011, CNX Gas Company, a wholly owned subsidiary of CONSOL Energy, and Noble Energy, Inc. (Noble Energy), an unrelated third-party, formed CONE Gathering LLC (CONE) to develop and operate each company's gas gathering system needs in the Marcellus Shale play. CONSOL Energy accounts for CNX Gas Company's 50% ownership interest in CONE under the equity method of accounting. In May 2014, CONSOL Energy and Noble Energy (collectively, "the Sponsors") formed CONE Midstream Partners LP (the Partnership), a master limited partnership, to own, operate, develop and acquire natural gas gathering and other midstream energy assets to service each company's production in the Marcellus Shale in Pennsylvania and West Virginia. The Partnership's general partner is CONE Midstream GP LLC, a wholly owned subsidiary of CONE. In September 2014, the Partnership closed its initial public offering of 20,125,000 common units representing limited partnership interests, which included a 2,625,000 common unit over-allotment option that was exercised in full by the underwriters. Following the IPO, CONE had a 2% general partner interest in the Partnership, while each sponsor had a 32.1% limited partner interest. CNX Gas Company accounts for its portion of the earnings in the Partnership under the equity method of accounting. In November 2016, the Partnership acquired from CONE an additional 25% ownership interest in CONE Midstream DevCo 1 LP, commonly referred to as the "Anchor Systems." The transaction included a total purchase consideration of $ 248,000 , comprised of $ 140,000 in cash and issuance of approximately 5,200,000 common limited partnership units to the Sponsors. Following the acquisition, CONE continues to have a 2% general partner interest in the Partnership, while each Sponsor's limited partner interest increased to 33.5%. At March 31, 2017 , CNX Gas Company and Noble Energy each continue to own a 50% interest in the assets of CONE that were not contributed to the Partnership. The following is a summary of the Company's Investment in Affiliates balances included within the Consolidated Balance Sheets associated with CONE and the Partnership, respectively: CONE The Partnership Total Balance at December 31, 2016 $ 151,075 $ 18,133 $ 169,208 Equity in Earnings 1,866 10,072 11,938 Distribution of Earnings — (5,909 ) (5,909 ) Balance at March 31, 2017 $ 152,941 $ 22,296 $ 175,237 The following transactions were included within Miscellaneous Other Income and Transportation, Gathering and Compression within the Consolidated Statements of Income: For the Three Months Ended March 31, 2017 2016 Miscellaneous Other Income: Equity in Earnings of Affiliates - CONE $ 1,866 $ 6,393 Equity in Earnings of Affiliates - the Partnership $ 10,072 $ 7,958 Transportation, Gathering and Compression: Gathering Services - CONE $ 253 $ 217 Gathering Services - the Partnership $ 34,054 $ 31,645 At March 31, 2017 and December 31, 2016 , CONSOL Energy had a net payable of $ 7,674 and $ 5,815 respectively, due to both the Partnership and CONE primarily for accrued but unpaid gathering services. CNX Coal Resources LP In July 2015, CNXC closed its initial public offering of 5,000,000 common units representing limited partnership interests at a price to the public of $15.00 per unit. Additionally, Greenlight Capital entered into a common unit purchase agreement with CNXC pursuant to which Greenlight Capital agreed to purchase, and CNXC agreed to sell, 5,000,000 common units at a price per unit equal to $15.00 , which equates to $75,000 in net proceeds. CNXC's general partner is CNX Coal Resources GP, a wholly owned subsidiary of CONSOL Energy. The underwriters of the IPO filing exercised an over-allotment option of 561,067 common units to the public at $15.00 per unit. In connection with the Initial Public Offering (IPO), CNXC entered into a $400,000 senior secured revolving credit facility with certain lenders and PNC Bank, National Association (PNC), as administrative agent. Obligations under the revolving credit facility are guaranteed by CNXC's subsidiaries (the "guarantor subsidiaries") and are secured by substantially all of CNXC's and CNXC's subsidiaries' assets pursuant to a security agreement and various mortgages. Under the new revolving credit facility, CNXC made an initial draw of $200,000 , and after origination fees of $3,000 , the net proceeds were $197,000 . The total net proceeds related to these transactions that were distributed to CONSOL Energy were $342,711 . In September 2016, CNXC and its wholly owned subsidiary, CNX Thermal Holdings LLC (CNX Thermal), entered into a Contribution Agreement with CONSOL Energy, CONSOL Pennsylvania Coal Company LLC and Conrhein Coal Company (the Contributing Parties) under which CNX Thermal acquired an additional 5% undivided interest in and to the Pennsylvania Mine Complex, in exchange for (i) cash consideration in the amount of $21,500 and (ii) CNXC's issuance of 3,956,496 Class A Preferred Units representing limited partner interests in CNXC at an issue price of $17.01 per Class A preferred Unit (the "Class A Preferred Unit Issue Price"), or an aggregate $67,300 in equity consideration. The Class A Preferred Unit Issue Price was calculated as the volume-weighted average trading price of CNXC's common units (the "Common Units") over the trailing 15-day trading period ending on September 29, 2016 (or $14.79 per unit), plus a 15% premium. In connection with the PA Mining acquisition, in September 2016, the General Partner and CNXC entered into the First Amended and Restated Omnibus Agreement (the "Amended Omnibus Agreement") with CONSOL Energy and certain of its subsidiaries. Under the Amended Omnibus Agreement, CONSOL Energy indemnified CNXC for certain liabilities. The Amended Omnibus Agreement also amended CNXC's obligations to CONSOL Energy with respect to the payment of an annual administrative support fee and reimbursement for the provisions of certain management and operating services provided, in each case to reflect structural changes in how those services are provided to CNXC by CONSOL Energy. Charges for services from CONSOL Energy include the following: For the Three Months Ended March 31, 2017 2016 Operating and Other Costs $ 872 $ 1,266 Selling, General and Administrative Expenses 717 1,116 Total Services from CONSOL Energy $ 1,589 $ 2,382 At March 31, 2017 and December 31, 2016, CNXC had a net payable to CONSOL Energy in the amount of $1,764 and $1,666 , respectively. This payable includes reimbursements for business expenses, executive fees, stock-based compensation and other items under the omnibus agreement.

Recent Accounting Pronouncement

Recent Accounting Pronouncements (Notes)	3 Months Ended
Recent Accounting Pronouncements (Notes)	Mar. 31, 2017
Accounting Changes and Error Corrections [Abstract]
New Accounting Pronouncements, Policy [Policy Text Block]	RECENT ACCOUNTING PRONOUNCEMENTS: In March 2017, the FASB issued Update 2017-07 - Compensation - Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost, which improves the presentation of net periodic pension cost and net periodic postretirement benefit cost. The amendments in the Update require that an employer report the service cost component in the same line item as other compensation costs arising from services rendered by the pertinent employees during the period. The other components of net benefit cost are required to be presented separately from the service cost component and outside a subtotal of income from operations, if one is presented. Because CONSOL Energy does not present an income from operations subtotal, that requirement is not applicable. Additionally, the Company's service cost component is deemed immaterial, and therefore, the other components of net benefit cost will not be presented separately. For public entities, the amendments in this Update are effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. Early adoption is permitted as of the beginning of a fiscal year for which financial statements have not been issued. The adoption of this guidance is not expected to have an impact on CONSOL Energy's financial statements In August 2016, the FASB issued Update 2016-15 - Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments, which addresses eight specific cash flow issues with the objective of reducing the existing diversity in practice. The amendments relate to debt prepayment or debt extinguishment costs, settlement of zero-coupon debt instruments or other debt instruments with coupon interest rates that are insignificant in relation to the effective interest rate of the borrowing, contingent consideration payments made after a business combination, proceeds from the settlement of insurance claims, proceeds from the settlement of corporate-owned life insurance policies, distributions received from equity method investees, and beneficial interests in securitization transactions. The Update also states that, in the absence of specific guidance for cash receipts and payments that have aspects of more than one class of cash flows, an entity should classify each separately identifiable source or use within the cash receipts and payments on the basis of their nature in financing, investing, or operating activities. In situations in which cash receipts or payments cannot be separated by source or use, the appropriate classification should depend on the activity that is likely to be the predominant source or use of cash flows for the item. The amendments in the Update will be applied using a retrospective transition method to each period presented and, for public entities, are effective for fiscal years beginning after December 15, 2017 and interim periods within those fiscal years. Early adoption is permitted, including adoption in an interim period. The Company is currently evaluating the impact this guidance may have on CONSOL Energy's financial statements. In May 2014, the FASB issued Update 2014-09 - Revenue from Contracts with Customers (Topic 606), which supersedes the revenue recognition requirements in Topic 605 - Revenue Recognition and most industry-specific guidance throughout the Industry Topics of the Codification. The objective of the amendments in this Update is to improve financial reporting by creating common revenue recognition guidance for U.S. GAAP and International Financial Reporting Standards (IFRS). The core principle of the guidance is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services and should disclose sufficient information, both qualitative and quantitative, to enable users of financial statements to understand the nature, amount, timing, and uncertainty of revenue and cash flows arising from contracts with customers. The following updates to Topic 606 were made during 2016: • In March 2016, the FASB issued Update 2016-08 - Principal versus Agent Considerations (Reporting Revenue Gross versus Net), which clarifies how an entity determines whether it is a principal or an agent for goods or services promised to a customer as well as the nature of the goods or services promised to their customers. • In April 2016, the FASB issued Update 2016-10 - Revenue from Contracts with Customers: Identifying Performance Obligations and Licensing, which seeks to address implementation issues in the areas of identifying performance obligations and licensing. • In May 2016, the FASB issued Update 2016-12 - Revenue from Contracts with Customers: Narrow Scope Improvements and Practical Expedients, which seeks to address implementation issues in the areas of collectibility, presentation of sales taxes, noncash consideration, and completed contracts and contract modifications at transition. • In December 2016, the FASB issued Update 2016-20 - Technical Corrections and Improvements to Topic 606, Revenue from Contracts with Customers, which includes amendments related to loan guarantee fees, contract costs, provisions for losses on construction and production-type contracts, scope, disclosures, contract modification, contract asset versus receivable, refund liability and advertising costs. The new standards are effective for annual reporting periods beginning after December 15, 2017, with the option to adopt as early as annual reporting periods beginning after December 15, 2016. Management continues to evaluate the impacts that these standards will have on CONSOL Energy's financial statements, specifically as it relates to contracts that contain positive electric power price related adjustments. CONSOL Energy anticipates using the modified retrospective approach to adoption as it relates to ASU 2014-09. 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. The Company is currently evaluating the impact this guidance may have on CONSOL Energy's financial statements.

Subsequent Event (Notes)

Subsequent Event (Notes)	3 Months Ended
Subsequent Event (Notes)	Mar. 31, 2017
Subsequent Event [Line Items]
Subsequent Events [Text Block]	SUBSEQUENT EVENTS: On April 3, 2017, CONSOL Energy finalized the sale of its Knox Energy LLC and Coalfield Pipeline Company subsidiaries that were previously classified as Held for Sale. At closing, CONSOL Energy received net cash proceeds of $ 18,944 . Due to various post closing adjustments, the estimated gain on the sale of these assets was approximately $ 500 . On May 1, 2017 CONSOL Energy finalized the sale of approximately 6,300 net undeveloped acres of the Utica-Point Pleasant Shale in Jefferson, Belmont and Guernsey counties, Ohio that were previously classified as Held for Sale. CONSOL Energy received total cash proceeds of $ 76,696 . The estimated gain on the sale of these assets was approximately $ 72,000 .

Basis of Presentation (Tables)

Basis of Presentation (Tables)	3 Months Ended
Basis of Presentation (Tables)	Mar. 31, 2017
BASIS OF PRESENTATION: [Abstract]
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]	he computations for basic and dilutive earnings per share are as follows: For the Three Months Ended March 31, 2017 2016 Numerator: Loss from Continuing Operations $ (33,502 ) $ (43,291 ) Less: Net Income Attributable to Non-Controlling Interest 5,464 1,114 Net Loss from Continuing Operations Attributable to CONSOL Energy Shareholders $ (38,966 ) $ (44,405 ) Loss from Discontinued Operations — (53,167 ) Net Loss Attributable to CONSOL Energy Shareholders $ (38,966 ) $ (97,572 ) Denominator: Weighted-average shares of common stock outstanding 229,817,169 229,259,228 Effect of dilutive shares — — Weighted-average diluted shares of common stock outstanding 229,817,169 229,259,228 Loss per Share: Basic (Continuing Operations) $ (0.17 ) $ (0.19 ) Basic (Discontinued Operations) — (0.24 ) Total Basic $ (0.17 ) $ (0.43 ) Dilutive (Continuing Operations) $ (0.17 ) $ (0.19 ) Dilutive (Discontinued Operations) — (0.24 ) Total Dilutive $ (0.17 ) $ (0.43 )
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]	The table below sets forth the share-based awards that have been excluded from the computation of the diluted earnings per share because their effect would be anti-dilutive: For the Three Months Ended March 31, 2017 2016 Anti-Dilutive Options 5,472,165 5,365,686 Anti-Dilutive Restricted Stock Units 951,320 868,842 Anti-Dilutive Performance Share Units 1,762,690 113,531 Anti-Dilutive Performance Stock Options 802,804 802,804 8,988,979 7,150,863
Schedule of Changes in Accumulated Other Comprehensive Income/(Loss) by Component [Table Text Block]	Changes in Accumulated Other Comprehensive Loss by component, net of tax, were as follows: Postretirement Benefits Balance at December 31, 2016 $ (392,556 ) Amounts Reclassified from Accumulated Other Comprehensive Loss 3,502 Add: Other Comprehensive Loss Attributable to Non-Controlling Interest 12 Balance at March 31, 2017 $ (389,042 )
Schedule of Reclassification of Adjustments to Accumulated Other Comprehensive Income [Table Text Block]	The following table shows the reclassification of adjustments out of Accumulated Other Comprehensive Loss: For the Three Months Ended March 31, 2017 2016 Derivative Instruments (Note 12) Natural Gas Price Swaps and Options $ — $ (15,438 ) Tax Expense — 5,624 Net of Tax $ — $ (9,814 ) Actuarially Determined Long-Term Liability Adjustments* (Note 4 and Note 5) Amortization of Prior Service Costs $ (749 ) $ (148 ) Recognized Net Actuarial Loss 6,303 5,511 Total 5,554 5,363 Tax Benefit (2,052 ) (2,018 ) Net of Tax $ 3,502 $ 3,345
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block]	The table below sets forth the share-based awards that have been exercised or released: For the Three Months Ended March 31, 2017 2016 Options 61,624 — Restricted Stock Units 334,040 484,680 Performance Share Units 560,936 — 956,600 484,680

Pension and OPEB - Periodic C28

Pension and OPEB - Periodic Cost (Tables)	3 Months Ended
Pension and OPEB - Periodic Cost (Tables)	Mar. 31, 2017
PENSION AND OTHER POSTRETIREMENT BENEFIT PLANS NET PERIODIC BENEFIT COSTS: [Abstract]
Components of Net Periodic Costs	Components of Net Periodic Benefit (Credit) Cost are as follows: Pension Benefits Other Post-Employment Benefits For the Three Months Ended March 31, For the Three Months Ended March 31, 2017 2016 2017 2016 Service Cost $ 846 $ 482 $ — $ — Interest Cost 6,428 6,841 5,986 6,060 Expected Return on Plan Assets (10,596 ) (11,869 ) — — Amortization of Prior Service Credits (148 ) (147 ) (601 ) — Recognized Net Actuarial Loss 2,351 2,116 5,778 4,792 Net Periodic Benefit (Credit) Cost $ (1,119 ) $ (2,577 ) $ 11,163 $ 10,852

CWP and Workers Comp - Net Pe29

CWP and Workers Comp - Net Periodic Costs (Tables)	3 Months Ended
CWP and Workers Comp - Net Periodic Costs (Tables)	Mar. 31, 2017
CWP And Workers Comp Net Periodic Cost [Abstract]
Schedule Of Postemployment Benefits Disclosure [Text Block]	Components of Net Periodic Benefit Cost (Credit) are as follows: CWP Workers' Compensation For the Three Months Ended March 31, For the Three Months Ended March 31, 2017 2016 2017 2016 Service Cost $ 1,129 $ 1,204 $ 1,463 $ 1,904 Interest Cost 1,013 1,123 592 638 Amortization of Actuarial Gain (1,908 ) (1,383 ) (153 ) (101 ) Administrative Fees 151 — 138 — State Administrative Fees and Insurance Bond Premiums — — 799 731 Curtailment Gain — (1,307 ) — — Net Periodic Benefit Cost (Credit) $ 385 $ (363 ) $ 2,839 $ 3,172

Inventories (Tables)

Inventories (Tables)	3 Months Ended
Inventories (Tables)	Mar. 31, 2017
Inventory Disclosure [Abstract]
Inventory components	March 31, December 31, Coal $ 12,626 $ 7,800 Supplies 56,992 57,661 Total Inventories $ 69,618 $ 65,461

Property, Plant and Equipment (

Property, Plant and Equipment (Tables)	3 Months Ended
Property, Plant and Equipment (Tables)	Mar. 31, 2017
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment	March 31, December 31, E&P Property, Plant and Equipment Intangible drilling cost $ 3,465,645 $ 3,583,565 Proved gas properties 1,982,134 2,016,916 Unproved gas properties 1,045,437 1,116,282 Gas gathering equipment 1,127,614 1,138,299 Gas wells and related equipment 763,248 791,996 Other gas assets 189,481 190,406 Gas advance royalties 13,186 13,762 Total E&P Property, Plant and Equipment $ 8,586,745 $ 8,851,226 Less: Accumulated Depreciation, Depletion and Amortization 3,126,778 3,106,296 Total E&P Property, Plant and Equipment - Net $ 5,459,967 $ 5,744,930 PA Mining Operations Property, Plant and Equipment Coal and other plant and equipment $ 2,318,308 $ 2,307,668 Coal properties and surface lands 458,976 458,398 Airshafts 372,656 371,752 Mine development 326,152 326,152 Coal advance mining royalties 16,108 16,224 Leased coal lands 26,556 26,566 Total PA Mining Operations and Other Property, Plant and Equipment $ 3,518,756 $ 3,506,760 Less: Accumulated Depreciation, Depletion and Amortization 1,810,108 1,768,712 Total PA Mining Operations and Other Property, Plant and Equipment - Net $ 1,708,648 $ 1,738,048 Other Property, Plant and Equipment Coal and other plant and equipment 531,692 532,919 Coal properties and surface lands 481,037 481,126 Airshafts 10,002 10,003 Mine development 17,988 17,988 Coal advance mining royalties 311,205 310,530 Leased coal lands 60,836 60,836 Total Other Property, Plant and Equipment $ 1,412,760 $ 1,413,402 Less: Accumulated Depreciation, Depletion and Amortization 758,456 755,941 Total Other Property, Plant and Equipment - Net $ 654,304 $ 657,461 Total Company Property, Plant and Equipment - Continuing Operations $ 13,518,261 $ 13,771,388 Less - Total Company Accumulated Depreciation, Depletion and Amortization 5,695,342 5,630,949 Total Company Property, Plant and Equipment - Held for Sale - Net 163,622 — Total Property, Plant and Equipment of Continuing Operations - Net $ 7,986,541 $ 8,140,439

Long-Term Debt (Tables)

Long-Term Debt (Tables)	3 Months Ended
Long-Term Debt (Tables)	Mar. 31, 2017
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 $1,750,044 and $1,850,000 plus Unamortized Premium of $4,266 and $4,731, respectively) $ 1,754,310 $ 1,854,731 Senior Notes due April 2023 at 8.00% (Principal of $500,000 less Unamortized Discount of $5,430 and $5,656, respectively) 494,570 494,344 Revolving Credit Facility - CNX Coal Resources LP 197,000 201,000 MEDCO Revenue Bonds in Series due September 2025 at 5.75% 102,865 102,865 Senior Notes due April 2020 at 8.25%, Issued at Par Value 74,470 74,470 Senior Notes due March 2021 at 6.375%, Issued at Par Value 20,611 20,611 Advance Royalty Commitments (7.73% Weighted Average Interest Rate) 2,678 2,678 Other Long-Term Note Maturing in 2018 (Principal of $1,431 and $1,789 less Unamortized Discount of $78 and $117, respectively) 1,353 1,672 Less: Unamortized Debt Issuance Costs 25,499 27,699 2,622,358 2,724,672 Less: Amounts Due in One Year* 1,660 1,677 Long-Term Debt $ 2,620,698 $ 2,722,995

Commitments and Contingencies (

Commitments and Contingencies (Tables)	3 Months Ended
Commitments and Contingencies (Tables)	Mar. 31, 2017
Long-term Purchase Commitment [Table Text Block]	At March 31, 2017 , CONSOL Energy 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 financial guarantees and letters of credit are recorded as liabilities in the financial statements. CONSOL Energy management believes that these guarantees will expire without being funded, and therefore the commitments 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: Employee-Related $ 84,086 $ 64,783 $ 19,303 $ — $ — Environmental 998 398 600 — — Other 248,238 247,266 972 — — Total Letters of Credit 333,322 312,447 20,875 — — Surety Bonds: Employee-Related 112,560 79,680 32,880 — — Environmental 516,349 475,312 41,037 — — Other 20,179 19,275 903 1 — Total Surety Bonds 649,088 574,267 74,820 1 — Guarantees: Other 41,554 10,737 17,067 12,821 929 Total Guarantees 41,554 10,737 17,067 12,821 929 Total Commitments $ 1,023,964 $ 897,451 $ 112,762 $ 12,822 $ 929
Unrecorded Unconditional Purchase Obligations Disclosure	ONSOL Energy and CNX Gas Company enter 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, 2017 , the purchase obligations for each of the next five years and beyond were as follows: Obligations Due Amount Less than 1 year $ 204,580 1 - 3 years 280,593 3 - 5 years 243,595 More than 5 years 598,135 Total Purchase Obligations $ 1,326,903

Derivative Instruments (Tables)

Derivative Instruments (Tables)	3 Months Ended
Derivative Instruments (Tables)	Mar. 31, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Derivative Instruments	were as follows: For the Three Months Ended March 31, 2017 2016 Beginning Balance – Accumulated OCI $ — $ 43,470 Less: Gain Reclassified from Accumulated OCI (Net of tax: $5,624) — (9,814 ) Ending Balance – Accumulated OCI $ — $ 33,656 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 Instr35

Fair Value of Financial Instruments (Tables)	3 Months Ended
Fair Value of Financial Instruments (Tables)	Mar. 31, 2017
Fair Value Disclosures [Abstract]
Fair Value, Assets Measured on Recurring Basis [Table Text Block]	The financial instruments measured at fair value on a recurring basis are summarized below: Fair Value Measurements at March 31, 2017 Fair Value Measurements at December 31, 2016 Description (Level 1) (Level 2) (Level 3) (Level 1) (Level 2) (Level 3) Gas Derivatives $ — $ (163,515 ) $ — $ — $ (188,156 ) $ — Murray Energy Guarantees $ — $ — $ (1,285 ) $ — $ — $ (1,362 )
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Table Text Block]	March 31, 2017 December 31, 2016 Carrying Amount Fair Value Carrying Amount Fair Value Cash and Cash Equivalents $ 61,266 $ 61,266 $ 60,475 $ 60,475 Long-Term Debt $ 2,647,857 $ 2,628,205 $ 2,752,371 $ 2,717,582

Segment Information (Tables)

Segment Information (Tables)	3 Months Ended
Segment Information (Tables)	Mar. 31, 2017	Mar. 31, 2016
Segment Reporting Information [Line Items]
Industry segment results	Marcellus Shale Utica Shale Coalbed Methane Other Gas Total E&P PA Mining Operations Other Adjustments and Eliminations Consolidated Sales—Outside $ 189,175 $ 53,668 $ 58,626 $ 16,294 $ 317,763 $ 316,448 $ — $ — $ 634,211 (Loss) Gain on Commodity Derivative Instruments (32,665 ) (2,688 ) (9,198 ) 22,088 (22,463 ) — — — (22,463 ) Other Outside Sales — — — — — — 13,053 — 13,053 Sales—Purchased Gas — — — 8,979 8,979 — — — 8,979 Freight—Outside — — — — — 12,282 — — 12,282 Intersegment Transfers — — — — — — 4,574 (4,574 ) — Total Sales and Freight $ 156,510 $ 50,980 $ 49,428 $ 47,361 $ 304,279 $ 328,730 $ 17,627 $ (4,574 ) $ 646,062 Earnings (Loss) From Continuing Operations Before Income Tax $ 29,969 $ 17,807 $ 3,608 $ (144,886 ) $ (93,502 ) $ 61,015 $ (50,230 ) $ (4,574 ) $ (87,291 ) (A) Segment Assets $ 6,074,299 $ 1,955,172 $ 1,029,724 $ 4,574 $ 9,063,769 (B) Depreciation, Depletion and Amortization $ 95,348 $ 42,301 $ 11,104 $ — $ 148,753 Capital Expenditures $ 100,793 $ 8,118 $ 4,067 $ — $ 112,978 (A) Includes equity in earnings of unconsolidated affiliates of $12,140 and $190 for Total E&P and Other, respectively. (B) Includes investments in unconsolidated equity affiliates of $194,607 and $2,778 for Total E&P and Other, respectively.	Marcellus Shale Utica Shale Coalbed Methane Other Gas Total E&P PA Mining Operations Other Adjustments and Eliminations Consolidated Sales—Outside $ 96,138 $ 34,261 $ 41,920 $ 8,936 $ 181,255 $ 226,164 $ — $ — $ 407,419 Gain (Loss) on Commodity Derivative Instruments 48,564 10,009 19,121 (22,634 ) 55,060 — — — 55,060 Other Outside Sales — — — — — — 7,766 — 7,766 Sales—Purchased Gas — — — 8,618 8,618 — — — 8,618 Freight—Outside — — — — — 13,110 — — 13,110 Intersegment Transfers — — 424 — 424 — — (424 ) — Total Sales and Freight $ 144,702 $ 44,270 $ 61,465 $ (5,080 ) $ 245,357 $ 239,274 $ 7,766 $ (424 ) $ 491,973 Earnings (Loss) From Continuing Operations Before Income Tax $ 19,482 $ 3,256 $ 12,606 $ (58,223 ) $ (22,879 ) $ 23,074 $ (66,862 ) $ (424 ) $ (67,091 ) (C) Segment Assets $ 6,814,568 $ 2,078,559 $ 1,295,011 $ 527,736 $ 10,715,874 (D) Depreciation, Depletion and Amortization $ 105,715 $ 41,266 $ 8,007 $ — $ 154,988 Capital Expenditures $ 62,862 $ 12,904 $ 1,890 $ — $ 77,656 (C) Includes equity in earnings of unconsolidated affiliates of $15,598 and $1,067 for Total E&P and Other, respectively. (D) Includes investments in unconsolidated equity affiliates of $248,034 and $3,594 for Total E&P and Other, respectively.
Reconciliation of Revenue and Operating Income from Segments to Consolidated	For the Three Months Ended March 31, 2017 2016 Segment (Loss) Income Before Income Taxes for reportable business segments $ (32,487 ) $ 195 Segment Loss Before Income Taxes for all other business segments (6,619 ) (16,997 ) Interest expense (44,433 ) (49,865 ) Eliminations (4,574 ) (424 ) Gain on debt extinguishment 822 — Loss From Continuing Operations Before Income Tax $ (87,291 ) $ (67,091 )
Reconciliation of Assets and Liabilities from Segment to Consolidated	March 31, 2017 2016 Segment assets for total reportable business segments $ 8,029,471 $ 8,893,127 Segment assets for all other business segments 810,939 876,286 Items excluded from segment assets: Cash and other investments 54,630 416,854 Recoverable income taxes 124,555 1,871 Deferred tax assets 44,174 — Discontinued Operations — 527,736 Total Consolidated Assets $ 9,063,769 $ 10,715,874

Guarantor Subsidiaries Financia

Guarantor Subsidiaries Financial Information (Tables)	3 Months Ended
Guarantor Subsidiaries Financial Information (Tables)	Mar. 31, 2017	Mar. 31, 2016
Condensed Financial Statements, Captions [Line Items]
Guarantor FInancial Statements [Table Text Block] [Table Text Block]	Income Statement for the Three Months Ended March 31, 2016 (unaudited): Parent Issuer CNX Gas Guarantor Other Subsidiary Guarantors CNXC Other Subsidiary Non-Guarantors Elimination Consolidated Revenues and Other Income: Natural Gas, NGLs and Oil Sales $ — $ 181,680 $ — $ — $ — $ (425 ) $ 181,255 Gain on Commodity Derivative Instruments — 55,060 — — — — 55,060 Coal Sales — — 169,623 56,541 — — 226,164 Other Outside Sales — — 7,766 — — — 7,766 Purchased Gas Sales — 8,618 — — — — 8,618 Freight-Outside Coal — — 9,841 3,269 — — 13,110 Miscellaneous Other Income (66,640 ) 30,161 17,969 1 — 66,640 48,131 Loss on Sale of Assets — (7,143 ) (120 ) (13 ) — — (7,276 ) Total Revenue and Other Income (66,640 ) 268,376 205,079 59,798 — 66,215 532,828 Costs and Expenses: Exploration and Production Costs Lease Operating Expense — 27,739 — — — — 27,739 Transportation, Gathering and Compression — 93,974 — — — — 93,974 Production, Ad Valorem, and Other Fees — 8,303 — — — — 8,303 Depreciation, Depletion and Amortization — 105,715 — — — — 105,715 Exploration and Production Related Other Costs — 1,747 — — — — 1,747 Purchased Gas Costs — 7,868 — — — — 7,868 Other Corporate Expenses — 22,798 — — — — 22,798 Selling, General, and Administrative Costs — 22,458 — — — — 22,458 Total Exploration and Production Costs — 290,602 — — — — 290,602 PA Mining Operations Costs Operating and Other Costs — — 115,611 38,490 — — 154,101 Depreciation, Depletion and Amortization — — 30,949 10,317 — — 41,266 Freight Expense — — 9,841 3,269 — — 13,110 Selling, General, and Administrative Costs — — 3,848 1,928 — — 5,776 Total PA Mining Operations Costs — — 160,249 54,004 — — 214,253 Other Costs Miscellaneous Operating Expense 3,720 — 31,597 — 22 — 35,339 Selling, General, and Administrative Costs — — 1,853 — — — 1,853 Depreciation, Depletion and Amortization 153 — 7,854 — — — 8,007 Interest Expense 45,880 653 1,354 1,978 — — 49,865 Total Other Costs 49,753 653 42,658 1,978 22 — 95,064 Total Costs And Expenses 49,753 291,255 202,907 55,982 22 — 599,919 (Loss) Earnings From Continuing Operations Before Income Tax (116,393 ) (22,879 ) 2,172 3,816 (22 ) 66,215 (67,091 ) Income Tax (Benefit) Expense (18,821 ) (9,355 ) 4,384 — (8 ) — (23,800 ) (Loss) Income From Continuing Operations (97,572 ) (13,524 ) (2,212 ) 3,816 (14 ) 66,215 (43,291 ) Loss From Discontinued Operations, net — — — — (53,167 ) — (53,167 ) Net (Loss) Income (97,572 ) (13,524 ) (2,212 ) 3,816 (53,181 ) 66,215 (96,458 ) Less: Net Income Attributable to Noncontrolling Interest — — — — — 1,114 1,114 Net (Loss) Income Attributable to CONSOL Energy Shareholders $ (97,572 ) $ (13,524 ) $ (2,212 ) $ 3,816 $ (53,181 ) $ 65,101 $ (97,572 )
Guarantor Condensed Cash Flow [Table Text Block]		Cash Flow for the Three Months Ended March 31, 2016 (unaudited): Parent CNX Gas Guarantor Other Subsidiary Guarantors CNXC Non-Guarantor Other Subsidiary Non- Guarantors Elimination Consolidated Net Cash Provided by (Used in) Continuing Operations $ 456,851 $ 58,594 $ 13,434 $ 3,511 $ (401,447 ) $ (7,281 ) $ 123,662 Net Cash Provided by Discontinued Operating Activities — — — — 6,290 — 6,290 Net Cash Provided by (Used in) Operating Activities $ 456,851 $ 58,594 $ 13,434 $ 3,511 $ (395,157 ) $ (7,281 ) $ 129,952 Cash Flows from Investing Activities: Capital Expenditures $ (1,281 ) $ (62,862 ) $ (10,288 ) $ (3,225 ) $ — $ — $ (77,656 ) Proceeds From Sales of Assets — 7,953 480 20 — — 8,453 Net Investments in Equity Affiliates — (2,145 ) (3,433 ) — — — (5,578 ) Net Cash Used in Continuing Investing Activities (1,281 ) (57,054 ) (13,241 ) (3,205 ) — — (74,781 ) Net Cash Provided by Discontinued Investing Activities — — — — 395,757 — 395,757 Net Cash (Used in) Provided by Investing Activities $ (1,281 ) $ (57,054 ) $ (13,241 ) $ (3,205 ) $ 395,757 $ — $ 320,976 Cash Flows from Financing Activities: Payments on Short-Term Borrowings $ (100,500 ) $ — $ — $ — $ — $ — $ (100,500 ) Payments on Miscellaneous Borrowings (353 ) (1,537 ) (193 ) (12 ) — — (2,095 ) Net Proceeds from Revolver - CNX Coal Resources LP — — — 15,000 — — 15,000 Distributions to Noncontrolling Interest — — — (12,144 ) — 6,731 (5,413 ) Net Change in Parent Advancements — — — (550 ) — 550 — Dividends Paid (2,294 ) — — — — — (2,294 ) Issuance of Common Stock 3 — — — — — 3 Treasury Stock Activity (1,510 ) — — — — — (1,510 ) Net Cash (Used in) Provided by Continuing Financing Activities (104,654 ) (1,537 ) (193 ) 2,294 — 7,281 (96,809 ) Net Cash Used in Discontinued Financing Activities — — — — (47 ) — (47 ) Net Cash (Used in) Provided by Financing Activities $ (104,654 ) $ (1,537 ) $ (193 ) $ 2,294 $ (47 ) $ 7,281 $ (96,856 )
Guarantor Condensed Comprehensive Income [Table Text Block]	Statement of Comprehensive Income for the Three Months Ended March 31, 2016 (unaudited): Parent CNX Gas Guarantor Other Subsidiary Guarantors CNXC Non- Guarantor Other Subsidiary Non- Guarantors Elimination Consolidated Net (Loss) Income $ (97,572 ) $ (13,524 ) $ (2,212 ) $ 3,816 $ (53,181 ) $ 66,215 $ (96,458 ) Other Comprehensive (Loss) Income: Actuarially Determined Long-Term Liability Adjustments (2,484 ) — (2,459 ) (25 ) — 2,484 (2,484 ) Reclassification of Cash Flow Hedge from OCI to Earnings (9,814 ) (9,814 ) — — — 9,814 (9,814 ) Other Comprehensive (Loss) Income: (12,298 ) (9,814 ) (2,459 ) (25 ) — 12,298 (12,298 ) Comprehensive (Loss) Income (109,870 ) (23,338 ) (4,671 ) 3,791 (53,181 ) 78,513 (108,756 ) Less: Comprehensive Income Attributable to Noncontrolling Interest — — — — — 1,114 1,114 Comprehensive (Loss) Income Attributable to CONSOL Energy Inc. Shareholders $ (109,870 ) $ (23,338 ) $ (4,671 ) $ 3,791 $ (53,181 ) $ 77,399 $ (109,870 )
Guarantor Balance Sheet [Table Text Block]	Balance Sheet at December 31, 2016 : Parent Issuer CNX Gas Guarantor Other Subsidiary Guarantors CNXC Non-Guarantor Other Subsidiary Non- Guarantors Elimination Consolidated Assets: Current Assets: Cash and Cash Equivalents $ 49,722 $ 83 $ — $ 9,785 $ 885 $ — $ 60,475 Accounts and Notes Receivable: Trade — 124,509 72,295 23,418 — — 220,222 Other Receivables 20,097 34,773 14,516 515 — — 69,901 Inventories — 15,301 38,669 11,491 — — 65,461 Recoverable Income Taxes 175,877 (59,026 ) — — — — 116,851 Prepaid Expenses 12,828 60,500 16,306 3,512 — — 93,146 Current Assets of Discontinued Operations — — — — 83 — 83 Total Current Assets 258,524 176,140 141,786 48,721 968 — 626,139 Property, Plant and Equipment: Property, Plant and Equipment 114,611 8,851,226 3,928,861 876,690 — — 13,771,388 Less-Accumulated Depreciation, Depletion and Amortization 84,788 3,106,296 1,997,687 442,178 — — 5,630,949 Total Property, Plant and Equipment-Net 29,823 5,744,930 1,931,174 434,512 — — 8,140,439 Other Assets: Deferred Income Taxes 25,904 (21,614 ) — — — — 4,290 Investment in Affiliates 7,974,260 188,376 27,269 — — (7,998,941 ) 190,964 Other 19,960 67,096 114,030 21,063 — — 222,149 Total Other Assets 8,020,124 233,858 141,299 21,063 — (7,998,941 ) 417,403 Total Assets $ 8,308,471 $ 6,154,928 $ 2,214,259 $ 504,296 $ 968 $ (7,998,941 ) $ 9,183,981 Liabilities and Equity: Current Liabilities: Accounts Payable $ 48,666 $ 127,309 $ 36,039 $ 18,797 $ — $ 10,805 $ 241,616 Accounts Payable (Recoverable)-Related Parties 1,832,908 1,034,138 (2,648,416 ) 1,666 (209,491 ) (10,805 ) — Current Portion of Long-Term Debt 1,533 6,369 4,010 88 — — 12,000 Other Accrued Liabilities 75,039 337,374 223,705 44,230 — — 680,348 Current Liabilities of Discontinued Operations — — — — 6,050 — 6,050 Total Current Liabilities 1,958,146 1,505,190 (2,384,662 ) 64,781 (203,441 ) — 940,014 Long-Term Debt: 2,421,511 26,884 115,685 197,989 — — 2,762,069 Deferred Credits and Other Liabilities: Postretirement Benefits Other Than Pensions — — 659,474 — — — 659,474 Pneumoconiosis Benefits — — 106,016 2,057 — — 108,073 Mine Closing — — 209,384 9,247 — — 218,631 Gas Well Closing — 195,704 27,549 99 — — 223,352 Workers’ Compensation — — 64,187 3,090 — — 67,277 Salary Retirement 112,543 — — — — — 112,543 Other 17,876 117,658 15,663 463 — — 151,660 Total Deferred Credits and Other Liabilities 130,419 313,362 1,082,273 14,956 — — 1,541,010 Total CONSOL Energy Inc. Stockholders’ Equity 3,798,395 4,309,492 3,400,963 226,570 204,409 (8,141,434 ) 3,798,395 Noncontrolling Interest — — — — — 142,493 142,493 Total Liabilities and Equity $ 8,308,471 $ 6,154,928 $ 2,214,259 $ 504,296 $ 968 $ (7,998,941 ) $ 9,183,981

Basis of Presentation Anti-Dilu

Basis of Presentation Anti-Dilutive Options and Units Exluded from Earnings Per Share (Details) - shares	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from the computation of diluted earnings per share	8,988,979	7,150,863
Antidilutive Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from the computation of diluted earnings per share	5,472,165	5,365,686
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	951,320	868,842
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	1,762,690	113,531
Performance Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from the computation of diluted earnings per share	802,804	802,804

Basis of Presentation Share-bas

Basis of Presentation Share-based Compensation (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	$ 4,609
Payments Related to Tax Withholding for Share-based Compensation	$ 6,278	$ 1,510
Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures	956,600	484,680
Performance Share Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Exercised	560,936	0
Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Exercised	61,624	0
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Exercised	334,040	484,680

Basis of Presentation Earnings

Basis of Presentation Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Income (Loss) from Continuing Operations, Including Portion Attributable to Noncontrolling Interest	$ (33,502)	$ (43,291)
Net Income (Loss) Attributable to Noncontrolling Interest	5,464	1,114
Income (Loss) from Continuing Operations Attributable to Parent	(38,966)	(44,405)
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent	0	(53,167)
Net Income (Loss)	$ (38,966)	$ (97,572)
Weighted average shares of common stock outstanding:
Basic	229,817,169,000	229,259,228,000
Effect of stock-based compensation awards	0	0
Dilutive	229,817,169,000	229,259,228,000
Earnings Per Share:
Income (Loss) from Continuing Operations, Per Basic Share	$ (0.17)	$ (0.19)
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share	0	(0.24)
Earnings Per Share, Basic	(0.17)	(0.43)
Income (Loss) from Continuing Operations, Per Diluted Share	(0.17)	(0.19)
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share	0	(0.24)
Earnings Per Share, Diluted	$ (0.17)	$ (0.43)

Basis of Presentation Changes i

Basis of Presentation Changes in Accumulated Other Comprehensive Income / (Loss) by component (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	$ (389,042)		$ (392,556)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Noncontrolling Interest	5,452	$ 1,114
Accumulated Defined Benefit Plans Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	(389,042)		$ (392,556)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Noncontrolling Interest	12
Amounts reclassified from accumulated other comprehensive income	$ 3,502

Basis of Presentation Reclassif

Basis of Presentation Reclassification of adjustments out of Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, before Tax	$ 0	$ (15,438)
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Tax	0	5,624
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax	0	(9,814)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	(749)	(148)
Defined Benefit Plan, Amortization of Gains (Losses)	6,303	5,511
Defined Benefit Plan, Net Periodic Benefit Cost	5,554	5,363
Other Comprehensive Income (Loss), Tax	(2,052)	(2,018)
Actuarially Determined Long-Term Liability Adjustments, Net of Tax	$ 3,502	$ 3,345

Discontinued Operations Stateme

Discontinued Operations Statement $ in Thousands	3 Months Ended
Discontinued Operations Statement $ in Thousands	Mar. 31, 2017USD ($)TRate	Mar. 31, 2016USD ($)	Dec. 31, 2016USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash Paid to Close Deal	$ 28,271
Escrow Deposits Related to Property Sales	$ 13,700
Royalty Percent \| Rate	20.00%
Royalty Per Ton - Year 1 \| T	75
Royalty Per Ton - Year 2 \| T	78.75
Royalty Per Ton - Year 3 \| T	82.69
Royalty Per Ton - Year 4 \| T	86.82
Royalty Per Ton - Year 5 \| T	91.16
Royalty Revenue	$ 8,785	$ 2,230
Proceeds from Sale of Property Held-for-sale	402,799
Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax	38,364
Disposal Group, Including Discontinued Operation, Assets, Current	0		$ 83
Disposal Group, Including Discontinued Operation, Liabilities, Current	5,892		6,050
Coronado [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Royalty Revenue	5,262
Buchanan and Other Assets [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal group, including discontinued operations, coal sales	0	76,519
Disposal Group, Including Discontinued Operations, Cargo and Freight Revenue	0	1,012
Disposal Group, Including Discontinued Operation, Other Income	0	43
Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax	0	38,364
Disposal Group, Including Discontinued Operation, Revenue	0	39,210
Disposal Group, Including Discontinued Operation, Operating Expense	0	88,066
Disposal Group, Including Discontinued Operation, Operating Income (Loss)	0	(48,856)
Discontinued Operation, Tax Effect of Discontinued Operation	0	4,311
Disposal Group, Including Discontinued Operation, Operating Income (Loss)	0	$ (53,167)
Disposal Group, Including Discontinued Operation, Accounts, Notes and Loans Receivable, Net	0		83
Disposal Group, Including Discontinued Operation, Assets, Current	0		83
Disposal Group, Including Discontinued Operation, Assets	0		83
Disposal Group, Including Discontinued Operation, Accounts Payable	0		36
Disposal Group, Including Discontinued Operation, Liabilities, Current	5,892		6,014
Disposal Group, Including Discontinued Operation, Liabilities	$ 5,892		$ 6,050

Other Income (Details)

Other Income (Details) - USD ($) $ in Thousands	3 Months Ended
Other Income (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Mar. 31, 2016
Proceeds from Contributions from Affiliates	$ 392	$ 2,314
Gas Gathering, Transportation, Marketing and Processing Revenue	3,153	2,748
Rental Income, Nonoperating	8,842	9,196
Royalty Revenue	8,785	2,230
Revenue, Coal Services	3,541	0
Interest Income, Other	1,543	214
Right of Way Income	1,001	15,733
Other Nonoperating Income	1,501	1,345
Other Income (including equity earnings)	40,696	48,131
CONE [Member]
Proceeds from Contributions from Affiliates	$ 11,938	$ 14,351

Pension and OPEB - Periodic C45

Pension and OPEB - Periodic Cost (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	$ (749)	$ (148)
Amortization of actuarial gain	6,303	5,511
Defined Benefit Plan, Net Periodic Benefit Cost	5,554	5,363
Pension Plan [Member]
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Service cost	846	482
Interest cost	6,428	6,841
Defined Benefit Plan, Expected Return on Plan Assets	10,596	11,869
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	(148)	(147)
Amortization of actuarial gain	2,351	2,116
Defined Benefit Plan, Net Periodic Benefit Cost	(1,119)	(2,577)
Other Postretirement Benefit Plan [Member]
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Service cost	0	0
Interest cost	5,986	6,060
Defined Benefit Plan, Expected Return on Plan Assets	0	0
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	(601)	0
Amortization of actuarial gain	5,778	4,792
Defined Benefit Plan, Net Periodic Benefit Cost	$ 11,163	$ 10,852

CWP and Workers Comp - Net Pe46

CWP and Workers Comp - Net Periodic Costs (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Amortization of actuarial gain	$ 6,303	$ 5,511
Defined Benefit Plan, Net Periodic Benefit Cost	5,554	5,363
Remeasurement of the Actuarially Determined Long-Term Liabilities		7,713
Workers Compensation [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	1,463	1,904
Interest cost	592	638
Amortization of actuarial gain	(153)	(101)
Defined Benefit Plan, Administration Expenses	138	0
Post Employment Benefit Plan, State Administrative Fees and Insurance Bond Premiums	799	731
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Settlements and Curtailments	0	0
Defined Benefit Plan, Net Periodic Benefit Cost	2,839	3,172
Coal Workers Pneumoconiosis [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	1,129	1,204
Interest cost	1,013	1,123
Amortization of actuarial gain	(1,908)	(1,383)
Defined Benefit Plan, Administration Expenses	151	0
Post Employment Benefit Plan, State Administrative Fees and Insurance Bond Premiums	0	0
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Settlements and Curtailments	0	1,307
Defined Benefit Plan, Net Periodic Benefit Cost	$ 385	(363)
Buchanan and Other Assets [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost		$ 1,290

Income Taxes Income Tax Reconci

Income Taxes Income Tax Reconciliation (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Effective Income Tax Rate Reconciliation, Percent	58.00%	34.90%
Unrecognized Tax Benefits	$ 9,103
Uncertain tax positions, effect if recognized	666
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	385		$ 305
Unrecognized Tax Benefits, Interest on Income Taxes Accrued	$ 80

Inventory Components (Details)

Inventory Components (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Inventory Disclosure [Abstract]
Coal	$ 12,626	$ 7,800
Supplies	56,992	57,661
Total Inventories	$ 69,618	$ 65,461

Property, Plant and Equipment49

Property, Plant and Equipment (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Property, Plant and Equipment [Line Items]
Impairment of Oil and Gas Properties	$ 137,865	$ 0
Unproven gas properties	1,045,437		$ 1,116,282
Drilling Cost	3,465,645		3,583,565
Gas gathering equipment	1,127,614		1,138,299
Gas wells and related equipment	763,248		791,996
Other gas assets	189,481		190,406
Gas advance royalties	13,186		13,762
Proven gas properties	1,982,134		2,016,916
Coal and other plant and equipment	2,318,308		2,307,668
Coal Lands and or Surface Rights	458,976		458,398
Property, Plant and Equipment, Other, Gross	372,656		371,752
Mine development	326,152		326,152
Coal advance mining royalties	16,108		16,224
Leased coal lands	26,556		26,566
Property, Plant and Equipment	13,518,261		13,771,388
Less Accumulated depreciation, depletion and amortization	5,695,342		5,630,949
Total Property, Plant and Equipment-Net	7,986,541		8,140,439
Assets Held-for-sale, Long Lived, Fair Value Disclosure	163,622		0
Property, Plant, and Equipment, Owned, Net	7,986,541		8,140,439
Gas Segment [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment	8,586,745		8,851,226
Less Accumulated depreciation, depletion and amortization	3,126,778		3,106,296
Total Property, Plant and Equipment-Net	5,459,967		5,744,930
PA Operations [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment	3,518,756		3,506,760
Less Accumulated depreciation, depletion and amortization	1,810,108		1,768,712
Total Property, Plant and Equipment-Net	1,708,648		1,738,048
Other Segments [Member]
Property, Plant and Equipment [Line Items]
Coal and other plant and equipment	531,692		532,919
Coal Lands and or Surface Rights	481,037		481,126
Property, Plant and Equipment, Other, Gross	10,002		10,003
Mine development	17,988		17,988
Coal advance mining royalties	311,205		310,530
Leased coal lands	60,836		60,836
Property, Plant and Equipment	1,412,760		1,413,402
Less Accumulated depreciation, depletion and amortization	758,456		755,941
Total Property, Plant and Equipment-Net	$ 654,304		$ 657,461

Short-Term Notes Payable (Detai

Short-Term Notes Payable (Details) $ in Thousands	3 Months Ended
Short-Term Notes Payable (Details) $ in Thousands	Mar. 31, 2017USD ($)	Dec. 31, 2016USD ($)
Short-term Debt [Line Items]
Credit facility, face amount	$ 400,000
Revolving Credit Facility [Member]
Short-term Debt [Line Items]
Credit facility, face amount	2,000,000
Line of Credit Facility, Maximum Borrowing Capacity	750,000
Additional Capacity Available On Credit Lines At Request	$ 500,000
Minimum interest coverage ratio	2.50
Interest coverage ratio	3.94
Current Ratio	2.41
Senior secured leverage ratio, maximum	1
Current secured leverage ratio	2.75
Letters of credit outstanding	$ 333,322	$ 325,676
Borrowings and issuance of letters of credit remaining capacity	$ 1,666,678	$ 1,674,324

Long-Term Debt (Details)

Long-Term Debt (Details) - USD ($) $ in Thousands	3 Months Ended
Long-Term Debt (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Debt Instrument [Line Items]
Payments of Debt Issuance Costs	$ 250
Capital Lease Obligations, Current	10,191		$ 10,323
Debt Instrument, Repurchased Face Amount	99,956
Long-term debt	(2,622,358)		(2,724,672)
Unamortized Debt Issuance Expense	25,499		27,699
Long-term Line of Credit, Noncurrent	197,000
Long-Term Debt	2,620,698		2,722,995
Long Term Debt, Current Maturities - Net of unamortized debt issuance costs	1,660		1,677
Gains (Losses) on Extinguishment of Debt	$ 822	$ 0
Senior notes due April 2020 at 8.25%
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	6.375%
Long-term debt	$ (74,470)		(74,470)
Senior notes due March 2021 at 6.375%
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	5.875%
Long-term debt	$ (20,611)		(20,611)
Senior Secured Notes Due March 2021 Par Value [Member] [Member] [Member]
Debt Instrument [Line Items]
Long-term debt	(1,754,310)		(1,854,731)
Senior Notes due April 2023 at 8.0% [Member]
Debt Instrument [Line Items]
Long-term debt	(494,570)		(494,344)
Baltimore Port Facility revenue bonds in series due September 2025 at 5.75%
Debt Instrument [Line Items]
Long-term debt	(102,865)		(102,865)
Advance royalty commitments
Debt Instrument [Line Items]
Long-term debt	(2,678)		(2,678)
Other long-term notes maturing at various dates through 2031
Debt Instrument [Line Items]
Long-term debt	$ (1,353)		(1,672)
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Long-term debt			$ (201,000)

Commitments and Contingencies A

Commitments and Contingencies Additional Information (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Commitments and Contingencies Disclosure [Line Items]
Loss Contingency, Range of Possible Loss, Portion Not Accrued	$ 549,758
Murray Energy [Member]
Commitments and Contingencies Disclosure [Line Items]
Contractual Obligation	$ 1,285	$ 1,362

Unrecorded Unconditional Purcha

Unrecorded Unconditional Purchase Obligation (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Unrecorded Unconditional Purchase Obligation [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	$ 1,023,964
Balance on First Anniversary [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	897,451
More Than One And Within Three Years From Balance Sheet Date [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	112,762
More Than Three And Within Five Years From Balance Sheet Date [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	12,822
Beyond Five Years of Balance Sheet Date [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	929
Standby Letters of Credit [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	333,322
Standby Letters of Credit [Member] \| Balance on First Anniversary [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	312,447
Standby Letters of Credit [Member] \| More Than One And Within Three Years From Balance Sheet Date [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	20,875
Standby Letters of Credit [Member] \| More Than Three And Within Five Years From Balance Sheet Date [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	0
Standby Letters of Credit [Member] \| Beyond Five Years of Balance Sheet Date [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	0
Surety Bonds [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	649,088
Surety Bonds [Member] \| Balance on First Anniversary [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	574,267
Surety Bonds [Member] \| More Than One And Within Three Years From Balance Sheet Date [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	74,820
Surety Bonds [Member] \| More Than Three And Within Five Years From Balance Sheet Date [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	1
Surety Bonds [Member] \| Beyond Five Years of Balance Sheet Date [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	0
Guarantees [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	41,554
Guarantees [Member] \| Balance on First Anniversary [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	10,737
Guarantees [Member] \| More Than One And Within Three Years From Balance Sheet Date [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	17,067
Guarantees [Member] \| More Than Three And Within Five Years From Balance Sheet Date [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	12,821
Guarantees [Member] \| Beyond Five Years of Balance Sheet Date [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	929
Employee Related Commitments [Member] \| Standby Letters of Credit [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	84,086
Employee Related Commitments [Member] \| Standby Letters of Credit [Member] \| Balance on First Anniversary [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	64,783
Employee Related Commitments [Member] \| Standby Letters of Credit [Member] \| More Than One And Within Three Years From Balance Sheet Date [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	19,303
Employee Related Commitments [Member] \| Standby Letters of Credit [Member] \| More Than Three And Within Five Years From Balance Sheet Date [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	0
Employee Related Commitments [Member] \| Standby Letters of Credit [Member] \| Beyond Five Years of Balance Sheet Date [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	0
Employee Related Commitments [Member] \| Surety Bonds [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	112,560
Employee Related Commitments [Member] \| Surety Bonds [Member] \| Balance on First Anniversary [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	79,680
Employee Related Commitments [Member] \| Surety Bonds [Member] \| More Than One And Within Three Years From Balance Sheet Date [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	32,880
Employee Related Commitments [Member] \| Surety Bonds [Member] \| More Than Three And Within Five Years From Balance Sheet Date [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	0
Employee Related Commitments [Member] \| Surety Bonds [Member] \| Beyond Five Years of Balance Sheet Date [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	0
Environment Related Commitments [Member] \| Standby Letters of Credit [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	998
Environment Related Commitments [Member] \| Standby Letters of Credit [Member] \| Balance on First Anniversary [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	398
Environment Related Commitments [Member] \| Standby Letters of Credit [Member] \| More Than One And Within Three Years From Balance Sheet Date [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	600
Environment Related Commitments [Member] \| Standby Letters of Credit [Member] \| More Than Three And Within Five Years From Balance Sheet Date [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	0
Environment Related Commitments [Member] \| Standby Letters of Credit [Member] \| Beyond Five Years of Balance Sheet Date [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	0
Environment Related Commitments [Member] \| Surety Bonds [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	516,349
Environment Related Commitments [Member] \| Surety Bonds [Member] \| Balance on First Anniversary [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	475,312
Environment Related Commitments [Member] \| Surety Bonds [Member] \| More Than One And Within Three Years From Balance Sheet Date [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	41,037
Environment Related Commitments [Member] \| Surety Bonds [Member] \| More Than Three And Within Five Years From Balance Sheet Date [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	0
Environment Related Commitments [Member] \| Surety Bonds [Member] \| Beyond Five Years of Balance Sheet Date [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	0
Other Commitments [Member] \| Standby Letters of Credit [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	248,238
Other Commitments [Member] \| Standby Letters of Credit [Member] \| Balance on First Anniversary [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	247,266
Other Commitments [Member] \| Standby Letters of Credit [Member] \| More Than One And Within Three Years From Balance Sheet Date [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	972
Other Commitments [Member] \| Standby Letters of Credit [Member] \| More Than Three And Within Five Years From Balance Sheet Date [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	0
Other Commitments [Member] \| Standby Letters of Credit [Member] \| Beyond Five Years of Balance Sheet Date [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	0
Other Commitments [Member] \| Surety Bonds [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	20,179
Other Commitments [Member] \| Surety Bonds [Member] \| Balance on First Anniversary [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	19,275
Other Commitments [Member] \| Surety Bonds [Member] \| More Than One And Within Three Years From Balance Sheet Date [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	903
Other Commitments [Member] \| Surety Bonds [Member] \| More Than Three And Within Five Years From Balance Sheet Date [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	1
Other Commitments [Member] \| Surety Bonds [Member] \| Beyond Five Years of Balance Sheet Date [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	0
Other Commitments [Member] \| Guarantees [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	41,554
Other Commitments [Member] \| Guarantees [Member] \| Balance on First Anniversary [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	10,737
Other Commitments [Member] \| Guarantees [Member] \| More Than One And Within Three Years From Balance Sheet Date [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	17,067
Other Commitments [Member] \| Guarantees [Member] \| More Than Three And Within Five Years From Balance Sheet Date [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	12,821
Other Commitments [Member] \| Guarantees [Member] \| Beyond Five Years of Balance Sheet Date [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	929
Murray Energy [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Contractual Obligation	1,285	$ 1,362
Purchase Commitment [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Less than 1 year	204,580
1 - 3 years	280,593
3 - 5 years	243,595
More than 5 years	598,135
Total Purchase Obligations	$ 1,326,903

Derivative Instruments (Details

Derivative Instruments (Details) $ in Thousands	3 Months Ended	12 Months Ended
Derivative Instruments (Details) $ in Thousands	Mar. 31, 2017USD ($)MMcf	Dec. 31, 2014MMcf	Dec. 31, 2016USD ($)
Commodity Member [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount, Volume \| MMcf	819,100,000,000	744,700,000,000
Derivative Liability, Current \| $	$ 25,838		$ 67,139
Derivative Liability, Noncurrent \| $	122,747		209,980
Derivative Asset, Noncurrent \| $	$ 58,422		$ 29,596
Basis Member [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount, Volume \| MMcf	476,800,000,000	482,000,000,000
Propane [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount, Volume \| MMcf	0	126,000

The Effect of Derivative Instru

The Effect of Derivative Instruments on the Consolidated Statement of Income (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016	Jun. 30, 2014
Derivative [Line Items]
Derivative, Cash Received on Hedge	$ (47,103)	$ 84,331
Unrealized Gain (Loss) on Commodity Derivatives	(22,463)	55,060
Accumulated Other Comprehensive Income (Loss), Net of Tax	(389,042)		$ (392,556)
Derivative Instruments, Gain Reclassified from Accumulated OCI into Income, Effective Portion	0	(9,814)
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net		(9,814)
Unrealized Gain (Loss) on Derivatives and Commodity Contracts	24,640	(29,271)
Gain (Loss) on Hedging Activity	(22,463)	55,060
Swap [Member]
Derivative [Line Items]
Derivative, Cash Received on Hedge	(24,607)	82,146
Unrealized Gain (Loss) on Derivatives and Commodity Contracts	162,604	(38,023)
Gain (Loss) on Hedging Activity	137,997	44,123
Swap [Member] \| Cash Flow Hedging [Member] \| Natural Gas [Member]
Derivative [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax		0		$ 43,470
Propane [Member]
Derivative [Line Items]
Derivative, Cash Received on Hedge	(1,216)	0
Basis Swap [Member]
Derivative [Line Items]
Derivative, Cash Received on Hedge		2,185
Derivative, Cost of Hedge Net of Cash Received	(21,280)
Unrealized Gain (Loss) on Derivatives and Commodity Contracts	(139,111)	(6,421)
Gain (Loss) on Hedging Activity	(160,391)	(4,236)
Reclassification out of Accumulated Other Comprehensive Income [Member]
Derivative [Line Items]
Unrealized Gain (Loss) on Derivatives and Commodity Contracts	0	15,438
Gain (Loss) on Hedging Activity	0	15,438
Natural Gas Liquids [Member]
Derivative [Line Items]
Unrealized Gain (Loss) on Derivatives and Commodity Contracts	1,147	(265)
Gain (Loss) on Hedging Activity	(69)	(265)
Revenue Mineral Sales [Member] \| Swap [Member] \| Cash Flow Hedging [Member] \| Natural Gas [Member]
Derivative [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	$ 0	$ 33,656

Derivative Instruments Asset_Li

Derivative Instruments Asset/Liability Derivative Table (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Commodity Member [Member]
Derivative [Line Items]
Derivative Asset, Current	$ 6,408	$ 16
Derivative Liability, Noncurrent	122,747	209,980
Derivative Asset, Noncurrent	58,422	29,596
Derivative Liability, Current	25,838	67,139
Gas Cash Flow hedges	64,830	29,612
Derivative Liability	148,585	277,119
Basis Swap [Member]
Derivative [Line Items]
Derivative Asset, Current	2,745	56,916
Derivative Liability, Noncurrent	70,281	21,593
Derivative Asset, Noncurrent	12,722	35,603
Derivative Liability, Current	24,946	11,575
Gas Cash Flow hedges	15,467	92,519
Derivative Liability	$ 95,227	$ 33,168

Financial Instruments Measured

Financial Instruments Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]
Gas Cash Flow hedges	$ 0	$ 0
Guarantees, Fair Value Disclosure	(1,285)	(1,362)
Significant Other Observable Inputs (Level 2)
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]
Gas Cash Flow hedges	(163,515)	(188,156)
Guarantees, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]
Gas Cash Flow hedges	0	0
Guarantees, Fair Value Disclosure	$ 0	$ 0

Fair Value of Financial Instr58

Fair Value of Financial Instruments Fair Value Disclosures (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016	Dec. 31, 2015
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Cash and Cash Equivalents	$ 61,266	$ 60,475	$ 426,646	$ 72,574
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Long-term Debt	2,622,358	2,724,672
Reported Value Measurement [Member]
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Cash and Cash Equivalents	61,266	60,475
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Long-term Debt	2,647,857	2,752,371
Portion at Fair Value Measurement [Member]
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Cash and Cash Equivalents	61,266	60,475
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Long-term Debt	$ 2,628,205	$ 2,717,582

Industry Segment Results (Detai

Industry Segment Results (Details) - USD ($) $ in Thousands	3 Months Ended
Industry Segment Results (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Segment Reporting Information [Line Items]
Total Revenue and Other Income	$ 698,709	$ 532,828
Natural Gas, NGLs and Oil Sales	317,763	181,255
Revenue, Net	646,062	491,973
Sales-Outside	634,211	407,419
Gain (Loss) on Hedging Activity	(22,463)	55,060
Sales Revenue, Services, Other	13,053	7,766
Revenue from Purchased Oil and Gas	8,979	8,618
Freight-Outside	12,282	13,110
Segment Reporting - Intersegment Transfers	0	0
Income (Loss) from Continuing Operations before Income Taxes, Domestic	(87,291)	(67,091)
Total Assets	9,063,769	10,715,874	$ 9,183,981
Depreciation, Depletion and Amortization	148,753	154,988
Segment Reporting - Capital Expenditures	112,978	77,656
Income (Loss) from Equity Method Investments	12,330	16,665
Total Reportable Segments [Member]
Segment Reporting Information [Line Items]
Income (Loss) from Continuing Operations before Income Taxes, Domestic	(32,487)	195
Gas Segment [Member]
Segment Reporting Information [Line Items]
Natural Gas, NGLs and Oil Sales	317,763	181,255
Revenue, Net	304,279	245,357
Gain (Loss) on Hedging Activity	(22,463)	55,060
Sales Revenue, Services, Other	0	0
Revenue from Purchased Oil and Gas	8,979	8,618
Freight-Outside	0	0
Segment Reporting - Intersegment Transfers	0	424
Income (Loss) from Continuing Operations before Income Taxes, Domestic	(93,502)	(22,879)
Total Assets	6,074,299	6,814,568
Depreciation, Depletion and Amortization	95,348	105,715
Segment Reporting - Capital Expenditures	100,793	62,862
Income (Loss) from Equity Method Investments	12,140	15,598
Equity Method Investments	194,607	248,034
Gas Segment [Member] \| Marcellus Shale [Member]
Segment Reporting Information [Line Items]
Natural Gas, NGLs and Oil Sales	189,175	96,138
Revenue, Net	156,510	144,702
Gain (Loss) on Hedging Activity	(32,665)	48,564
Sales Revenue, Services, Other	0	0
Revenue from Purchased Oil and Gas	0	0
Freight-Outside	0	0
Segment Reporting - Intersegment Transfers	0	0
Income (Loss) from Continuing Operations before Income Taxes, Domestic	29,969	19,482
Gas Segment [Member] \| Utica Shale [Member]
Segment Reporting Information [Line Items]
Natural Gas, NGLs and Oil Sales	53,668	34,261
Revenue, Net	50,980	44,270
Gain (Loss) on Hedging Activity	(2,688)	10,009
Sales Revenue, Services, Other	0	0
Revenue from Purchased Oil and Gas	0	0
Freight-Outside	0	0
Segment Reporting - Intersegment Transfers	0	0
Income (Loss) from Continuing Operations before Income Taxes, Domestic	17,807	3,256
Gas Segment [Member] \| Coalbed Methane [Member]
Segment Reporting Information [Line Items]
Natural Gas, NGLs and Oil Sales	58,626	41,920
Revenue, Net	49,428	61,465
Gain (Loss) on Hedging Activity	(9,198)	19,121
Sales Revenue, Services, Other	0	0
Revenue from Purchased Oil and Gas	0	0
Freight-Outside	0	0
Segment Reporting - Intersegment Transfers	0	424
Income (Loss) from Continuing Operations before Income Taxes, Domestic	3,608	12,606
Gas Segment [Member] \| Other Gas [Member]
Segment Reporting Information [Line Items]
Natural Gas, NGLs and Oil Sales	16,294	8,936
Revenue, Net	47,361	(5,080)
Gain (Loss) on Hedging Activity	22,088	(22,634)
Sales Revenue, Services, Other	0	0
Revenue from Purchased Oil and Gas	8,979	8,618
Freight-Outside	0	0
Segment Reporting - Intersegment Transfers	0	0
Income (Loss) from Continuing Operations before Income Taxes, Domestic	(144,886)	(58,223)
Coal Segment [Member] \| PA Operations [Member]
Segment Reporting Information [Line Items]
Segment Reporting - Intersegment Transfers	0
PA Operations [Member]
Segment Reporting Information [Line Items]
Revenue, Net	328,730	239,274
Sales-Outside	316,448	226,164
Gain (Loss) on Hedging Activity	0	0
Sales Revenue, Services, Other	0	0
Revenue from Purchased Oil and Gas	0	0
Freight-Outside	12,282	13,110
Segment Reporting - Intersegment Transfers		0
Income (Loss) from Continuing Operations before Income Taxes, Domestic	61,015	23,074
Total Assets	1,955,172	2,078,559
Depreciation, Depletion and Amortization	42,301	41,266
Segment Reporting - Capital Expenditures	8,118	12,904
Other Segments [Member]
Segment Reporting Information [Line Items]
Revenue, Net	17,627	7,766
Sales-Outside	0	0
Gain (Loss) on Hedging Activity	0	0
Sales Revenue, Services, Other	13,053	7,766
Revenue from Purchased Oil and Gas	0	0
Freight-Outside	0	0
Segment Reporting - Intersegment Transfers	4,574	0
Income (Loss) from Continuing Operations before Income Taxes, Domestic	(50,230)	(66,862)
Total Assets	1,029,724	1,295,011
Depreciation, Depletion and Amortization	11,104	8,007
Segment Reporting - Capital Expenditures	4,067	1,890
Income (Loss) from Equity Method Investments	190	1,067
Equity Method Investments	2,778	3,594
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Revenue, Net	(4,574)	(424)
Sales-Outside	0	0
Gain (Loss) on Hedging Activity	0	0
Sales Revenue, Services, Other	0	0
Revenue from Purchased Oil and Gas	0	0
Freight-Outside	0	0
Segment Reporting - Intersegment Transfers	(4,574)	(424)
Income (Loss) from Continuing Operations before Income Taxes, Domestic	(4,574)	(424)
Total Assets	4,574	527,736
Depreciation, Depletion and Amortization	0	0
Segment Reporting - Capital Expenditures	$ 0	$ 0

Reconciliation of Segment Infor

Reconciliation of Segment Information, Revenue and Other Income (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Sales Revenue, Services, Other	$ 13,053	$ 7,766
Revenue, Net	646,062	491,973
Income (Loss) from Continuing Operations before Income Taxes, Domestic	(87,291)	(67,091)
Depreciation, Depletion and Amortization	148,753	154,988
Segment Reporting - Capital Expenditures	112,978	77,656
Total Revenue and Other Income	698,709	532,828
Total Reportable Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Income (Loss) from Continuing Operations before Income Taxes, Domestic	(32,487)	195
Other Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Equity Method Investments	2,778	3,594
Sales Revenue, Services, Other	13,053	7,766
Revenue, Net	17,627	7,766
Income (Loss) from Continuing Operations before Income Taxes, Domestic	(50,230)	(66,862)
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest	(6,619)	(16,997)
Depreciation, Depletion and Amortization	11,104	8,007
Segment Reporting - Capital Expenditures	4,067	1,890
Excludes Gas Segment [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Interest Income (Expense), Net and Other Non-operating Activity	(44,433)	(49,865)
Related Party Transaction, Expenses from Transactions with Related Party	4,574	(424)
Corporate Adjustments And Eliminations [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Gain (Loss) Estimates on Extinguishment of Debt	822	0
Intersegment Eliminations [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Sales Revenue, Services, Other	0	0
Revenue, Net	(4,574)	(424)
Income (Loss) from Continuing Operations before Income Taxes, Domestic	(4,574)	(424)
Depreciation, Depletion and Amortization	0	0
Segment Reporting - Capital Expenditures	0	0
Gas Segment [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Equity Method Investments	194,607	248,034
Sales Revenue, Services, Other	0	0
Revenue, Net	304,279	245,357
Income (Loss) from Continuing Operations before Income Taxes, Domestic	(93,502)	(22,879)
Depreciation, Depletion and Amortization	95,348	105,715
Segment Reporting - Capital Expenditures	100,793	62,862
Coalbed Methane [Member] \| Gas Segment [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Sales Revenue, Services, Other	0	0
Revenue, Net	49,428	61,465
Income (Loss) from Continuing Operations before Income Taxes, Domestic	3,608	12,606
Utica Shale [Member] \| Gas Segment [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Sales Revenue, Services, Other	0	0
Revenue, Net	50,980	44,270
Income (Loss) from Continuing Operations before Income Taxes, Domestic	17,807	3,256
Other Gas [Member] \| Gas Segment [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Sales Revenue, Services, Other	0	0
Revenue, Net	47,361	(5,080)
Income (Loss) from Continuing Operations before Income Taxes, Domestic	$ (144,886)	$ (58,223)

Reconciliation of Segment Inf61

Reconciliation of Segment Information, Total Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016
Assets:
Total Assets	$ 9,063,769	$ 9,183,981	$ 10,715,874
Total Other Assets	461,013	417,403
Items excluded from segment assets:
Recoverable Income Taxes	124,555	$ 116,851
Operating Segments [Member]
Assets:
Total Assets	8,029,471		8,893,127
Corporate and Other [Member]
Assets:
Total Other Assets	810,939		876,286
Gas Segment [Member]
Assets:
Total Assets	6,074,299		6,814,568
Other Segments [Member]
Assets:
Total Assets	1,029,724		1,295,011
Items excluded from segment assets:
Cash and Other Investments	54,630
Excludes Gas Segment [Member]
Items excluded from segment assets:
Cash and Other Investments			416,854
Intersegment Eliminations [Member]
Assets:
Total Assets	4,574		527,736
Items excluded from segment assets:
Cash and Other Investments	124,555
Recoverable Income Taxes			1,871
Deferred Tax Assets, Net of Valuation Allowance	44,174		0
Disposal Group, Including Discontinued Operation, Assets	$ 0		$ 527,736

Guarantor Subsidiaries Financ62

Guarantor Subsidiaries Financial Information Additional Information (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016	Dec. 31, 2015
Condensed Financial Statements, Captions [Line Items]
Cash and Cash Equivalents	$ 61,266	$ 60,475	$ 426,646	$ 72,574
Long-term Debt	2,622,358	2,724,672
Accounts and Notes Receivable:
Trade	215,329	220,222
Inventories	$ 69,618	65,461
Senior Notes 8 Percent Due April 2017 Par Value [Member]
Condensed Financial Statements, Captions [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	8.25%
Senior notes due April 2020 at 8.25%
Condensed Financial Statements, Captions [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	6.375%
Long-term Debt	$ 74,470	74,470
Senior Secured Notes Due March 2021 Par Value [Member] [Member] [Member]
Condensed Financial Statements, Captions [Line Items]
Long-term Debt	$ 1,754,310	1,854,731
Senior notes due March 2021 at 6.375%
Condensed Financial Statements, Captions [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	5.875%
Long-term Debt	$ 20,611	20,611
Senior Notes due April 2023 at 8.0% [Member]
Condensed Financial Statements, Captions [Line Items]
Long-term Debt	$ 494,570	$ 494,344
Senior Notes 8 Percent Due April 2023 Par Value [Member] [Member]
Condensed Financial Statements, Captions [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	8.00%

Guarantor Subsidiaries Income S

Guarantor Subsidiaries Income Statement (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Schedule of Condensed Consolidating Statement of Operations [Line Items]
Natural Gas, NGLs and Oil Sales	$ 317,763	$ 181,255
Unrealized Gain (Loss) on Commodity Derivatives	(22,463)	55,060
Coal Sales	316,448	226,164
Other Revenue, Net	13,053	7,766
Purchased Gas Sales	8,979	8,618
Freight-Outside	12,282	13,110
Other Income (including equity earnings)	40,696	48,131
Gain (Loss) on Sale of Assets	11,951	(7,276)
Total Revenue and Other Income	698,709	532,828
Oil and Gas Property, Lease Operating Expense	21,633	27,739
Gas Gathering, Transportation, Marketing and Processing Costs	94,332	93,974
Production Tax Expense	9,329	8,303
E&P Depreciation, Depletion, and Amortization	95,348	105,715
Exploration and Production Costs	9,786	1,747
Production Royalty Interests and Purchased Gas Costs	8,895	7,868
Other Expenses	17,930	22,798
Impairment of Oil and Gas Properties	137,865	0
Results of Operations, General and Administrative Related to Oil and Gas Producing Activities	21,490	22,458
Oil and Gas Production Expense	416,608	290,602
Operating Expenses	199,815	154,101
Coal Depreciation, Depletion, Amortization	42,301	41,266
Freight Expense	12,282	13,110
General and Administrative Expense	14,868	5,776
Cost of Coal Products and Services	269,266	214,253
Other Nonoperating Expense	43,200	35,339
Other General and Administrative Expense	2,211	1,853
Depreciation, Depletion and Amortization, Nonproduction	11,104	8,007
Gains (Losses) on Extinguishment of Debt	(822)	0
Interest Expense	44,433	49,865
Other General Expense	100,126	95,064
Total Costs	786,000	599,919
Income (Loss) from Continuing Operations before Income Taxes, Domestic	(87,291)	(67,091)
Income Tax Expense (Benefit)	(53,789)	(23,800)
Income (Loss) from Continuing Operations, Including Portion Attributable to Noncontrolling Interest	(33,502)	(43,291)
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent	0	(53,167)
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	(33,502)	(96,458)
Net Income (Loss) Attributable to Noncontrolling Interest	5,464	1,114
Net Income (Loss)	(38,966)	(97,572)
Parent Issuer [Member]
Schedule of Condensed Consolidating Statement of Operations [Line Items]
Natural Gas, NGLs and Oil Sales	0	0
Unrealized Gain (Loss) on Commodity Derivatives	0	0
Coal Sales	0	0
Other Revenue, Net	0	0
Purchased Gas Sales	0	0
Freight-Outside	0	0
Other Income (including equity earnings)	(8,486)	(66,640)
Gain (Loss) on Sale of Assets	0	0
Total Revenue and Other Income	(8,486)	(66,640)
Oil and Gas Property, Lease Operating Expense	0	0
Gas Gathering, Transportation, Marketing and Processing Costs	0	0
Production Tax Expense	0	0
E&P Depreciation, Depletion, and Amortization	0	0
Exploration and Production Costs	0	0
Production Royalty Interests and Purchased Gas Costs	0	0
Other Expenses	0	0
Impairment of Oil and Gas Properties	0
Results of Operations, General and Administrative Related to Oil and Gas Producing Activities	0	0
Oil and Gas Production Expense	0	0
Operating Expenses	0	0
Coal Depreciation, Depletion, Amortization	0	0
Freight Expense	0	0
General and Administrative Expense	0	0
Cost of Coal Products and Services	0	0
Other Nonoperating Expense	10,278	3,720
Other General and Administrative Expense	0	0
Depreciation, Depletion and Amortization, Nonproduction	1	153
Gains (Losses) on Extinguishment of Debt	(822)
Interest Expense	39,570	45,880
Other General Expense	49,027	49,753
Total Costs	49,027	49,753
Income (Loss) from Continuing Operations before Income Taxes, Domestic	(57,513)	(116,393)
Income Tax Expense (Benefit)	(18,547)	(18,821)
Income (Loss) from Continuing Operations, Including Portion Attributable to Noncontrolling Interest	(38,966)	(97,572)
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent		0
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	(38,966)	(97,572)
Net Income (Loss) Attributable to Noncontrolling Interest	0	0
Net Income (Loss)	(38,966)	(97,572)
CNX Gas Guarantor [Member]
Schedule of Condensed Consolidating Statement of Operations [Line Items]
Natural Gas, NGLs and Oil Sales	317,763	181,680
Unrealized Gain (Loss) on Commodity Derivatives	(22,463)	55,060
Coal Sales	0	0
Other Revenue, Net	0	0
Purchased Gas Sales	8,979	8,618
Freight-Outside	0	0
Other Income (including equity earnings)	15,842	30,161
Gain (Loss) on Sale of Assets	3,606	(7,143)
Total Revenue and Other Income	323,727	268,376
Oil and Gas Property, Lease Operating Expense	21,633	27,739
Gas Gathering, Transportation, Marketing and Processing Costs	94,332	93,974
Production Tax Expense	9,329	8,303
E&P Depreciation, Depletion, and Amortization	95,348	105,715
Exploration and Production Costs	9,786	1,747
Production Royalty Interests and Purchased Gas Costs	8,895	7,868
Other Expenses	17,930	22,798
Impairment of Oil and Gas Properties	137,865
Results of Operations, General and Administrative Related to Oil and Gas Producing Activities	21,490	22,458
Oil and Gas Production Expense	416,608	290,602
Operating Expenses	0	0
Coal Depreciation, Depletion, Amortization	0	0
Freight Expense	0	0
General and Administrative Expense	0	0
Cost of Coal Products and Services	0	0
Other Nonoperating Expense	0	0
Other General and Administrative Expense	0	0
Depreciation, Depletion and Amortization, Nonproduction	0	0
Gains (Losses) on Extinguishment of Debt	0
Interest Expense	621	653
Other General Expense	621	653
Total Costs	417,229	291,255
Income (Loss) from Continuing Operations before Income Taxes, Domestic	(93,502)	(22,879)
Income Tax Expense (Benefit)	(37,158)	(9,355)
Income (Loss) from Continuing Operations, Including Portion Attributable to Noncontrolling Interest	(56,344)	(13,524)
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent		0
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	(56,344)	(13,524)
Net Income (Loss) Attributable to Noncontrolling Interest	0	0
Net Income (Loss)	(56,344)	(13,524)
Other Guarantors Subsidiaries [Member]
Schedule of Condensed Consolidating Statement of Operations [Line Items]
Natural Gas, NGLs and Oil Sales	0	0
Unrealized Gain (Loss) on Commodity Derivatives	0	0
Coal Sales	237,336	169,623
Other Revenue, Net	13,053	7,766
Purchased Gas Sales	0	0
Freight-Outside	9,212	9,841
Other Income (including equity earnings)	23,753	17,969
Gain (Loss) on Sale of Assets	8,348	(120)
Total Revenue and Other Income	291,702	205,079
Oil and Gas Property, Lease Operating Expense	0	0
Gas Gathering, Transportation, Marketing and Processing Costs	0	0
Production Tax Expense	0	0
E&P Depreciation, Depletion, and Amortization	0	0
Exploration and Production Costs	0	0
Production Royalty Interests and Purchased Gas Costs	0	0
Other Expenses	0	0
Impairment of Oil and Gas Properties	0
Results of Operations, General and Administrative Related to Oil and Gas Producing Activities	0	0
Oil and Gas Production Expense	0	0
Operating Expenses	149,932	115,611
Coal Depreciation, Depletion, Amortization	31,780	30,949
Freight Expense	9,212	9,841
General and Administrative Expense	11,585	3,848
Cost of Coal Products and Services	202,509	160,249
Other Nonoperating Expense	32,922	31,597
Other General and Administrative Expense	2,211	1,853
Depreciation, Depletion and Amortization, Nonproduction	11,103	7,854
Gains (Losses) on Extinguishment of Debt	0
Interest Expense	1,785	1,354
Other General Expense	48,021	42,658
Total Costs	250,530	202,907
Income (Loss) from Continuing Operations before Income Taxes, Domestic	41,172	2,172
Income Tax Expense (Benefit)	1,916	4,384
Income (Loss) from Continuing Operations, Including Portion Attributable to Noncontrolling Interest	39,256	(2,212)
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent		0
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	39,256	(2,212)
Net Income (Loss) Attributable to Noncontrolling Interest	0	0
Net Income (Loss)	39,256	(2,212)
CNX Coal Resources LP [Member]
Schedule of Condensed Consolidating Statement of Operations [Line Items]
Natural Gas, NGLs and Oil Sales	0	0
Unrealized Gain (Loss) on Commodity Derivatives	0	0
Coal Sales	79,112	56,541
Other Revenue, Net	0	0
Purchased Gas Sales	0	0
Freight-Outside	3,070	3,269
Other Income (including equity earnings)	1,101	1
Gain (Loss) on Sale of Assets	(3)	(13)
Total Revenue and Other Income	83,280	59,798
Oil and Gas Property, Lease Operating Expense	0	0
Gas Gathering, Transportation, Marketing and Processing Costs	0	0
Production Tax Expense	0	0
E&P Depreciation, Depletion, and Amortization	0	0
Exploration and Production Costs	0	0
Production Royalty Interests and Purchased Gas Costs	0	0
Other Expenses	0	0
Impairment of Oil and Gas Properties	0
Results of Operations, General and Administrative Related to Oil and Gas Producing Activities	0	0
Oil and Gas Production Expense	0	0
Operating Expenses	49,883	38,490
Coal Depreciation, Depletion, Amortization	10,521	10,317
Freight Expense	3,070	3,269
General and Administrative Expense	3,283	1,928
Cost of Coal Products and Services	66,757	54,004
Other Nonoperating Expense	0	0
Other General and Administrative Expense	0	0
Depreciation, Depletion and Amortization, Nonproduction	0	0
Gains (Losses) on Extinguishment of Debt	0
Interest Expense	2,457	1,978
Other General Expense	2,457	1,978
Total Costs	69,214	55,982
Income (Loss) from Continuing Operations before Income Taxes, Domestic	14,066	3,816
Income Tax Expense (Benefit)	0	0
Income (Loss) from Continuing Operations, Including Portion Attributable to Noncontrolling Interest	14,066	3,816
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent		0
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	14,066	3,816
Net Income (Loss) Attributable to Noncontrolling Interest	0	0
Net Income (Loss)	14,066	3,816
Non-Guarantors [Member]
Schedule of Condensed Consolidating Statement of Operations [Line Items]
Natural Gas, NGLs and Oil Sales		0
Unrealized Gain (Loss) on Commodity Derivatives		0
Coal Sales		0
Other Revenue, Net		0
Purchased Gas Sales		0
Freight-Outside		0
Other Income (including equity earnings)		0
Gain (Loss) on Sale of Assets		0
Total Revenue and Other Income		0
Oil and Gas Property, Lease Operating Expense		0
Gas Gathering, Transportation, Marketing and Processing Costs		0
Production Tax Expense		0
E&P Depreciation, Depletion, and Amortization		0
Exploration and Production Costs		0
Production Royalty Interests and Purchased Gas Costs		0
Other Expenses		0
Results of Operations, General and Administrative Related to Oil and Gas Producing Activities		0
Oil and Gas Production Expense		0
Operating Expenses		0
Coal Depreciation, Depletion, Amortization		0
Freight Expense		0
General and Administrative Expense		0
Cost of Coal Products and Services		0
Other Nonoperating Expense		22
Other General and Administrative Expense		0
Depreciation, Depletion and Amortization, Nonproduction		0
Interest Expense		0
Other General Expense		22
Total Costs		22
Income (Loss) from Continuing Operations before Income Taxes, Domestic		(22)
Income Tax Expense (Benefit)		(8)
Income (Loss) from Continuing Operations, Including Portion Attributable to Noncontrolling Interest		(14)
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent		(53,167)
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	0	(53,181)
Net Income (Loss) Attributable to Noncontrolling Interest		0
Net Income (Loss)		(53,181)
Consolidation, Eliminations [Member]
Schedule of Condensed Consolidating Statement of Operations [Line Items]
Natural Gas, NGLs and Oil Sales	0	(425)
Unrealized Gain (Loss) on Commodity Derivatives	0	0
Coal Sales	0	0
Other Revenue, Net	0	0
Purchased Gas Sales	0	0
Freight-Outside	0	0
Other Income (including equity earnings)	8,486	66,640
Gain (Loss) on Sale of Assets	0	0
Total Revenue and Other Income	8,486	66,215
Oil and Gas Property, Lease Operating Expense	0	0
Gas Gathering, Transportation, Marketing and Processing Costs	0	0
Production Tax Expense	0	0
E&P Depreciation, Depletion, and Amortization	0	0
Exploration and Production Costs	0	0
Production Royalty Interests and Purchased Gas Costs	0	0
Other Expenses	0	0
Impairment of Oil and Gas Properties	0
Results of Operations, General and Administrative Related to Oil and Gas Producing Activities	0	0
Oil and Gas Production Expense	0	0
Operating Expenses	0	0
Coal Depreciation, Depletion, Amortization	0	0
Freight Expense	0	0
General and Administrative Expense	0	0
Cost of Coal Products and Services	0	0
Other Nonoperating Expense	0	0
Other General and Administrative Expense	0	0
Depreciation, Depletion and Amortization, Nonproduction	0	0
Gains (Losses) on Extinguishment of Debt	0
Interest Expense	0	0
Other General Expense	0	0
Total Costs	0	0
Income (Loss) from Continuing Operations before Income Taxes, Domestic	8,486	66,215
Income Tax Expense (Benefit)	0	0
Income (Loss) from Continuing Operations, Including Portion Attributable to Noncontrolling Interest	8,486	66,215
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent		0
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	8,486	66,215
Net Income (Loss) Attributable to Noncontrolling Interest	5,464	1,114
Net Income (Loss)	$ 3,022	$ 65,101

Guarantor Subsidiaries Balance

Guarantor Subsidiaries Balance Sheet (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016	Dec. 31, 2015
Schedule of Condensed Consolidating Balance Sheets [Line Items]
Assets Held-for-sale, Long Lived, Fair Value Disclosure	$ 163,622	$ 0
Current Assets:
Cash and Cash Equivalents	61,266	60,475	$ 426,646	$ 72,574
Accounts and Notes Receivable:
Other Receivables, Net, Current	100,949	69,901
Trade	215,329	220,222
Inventories	69,618	65,461
Recoverable Income Taxes	124,555	116,851
Prepaid Expenses	44,498	93,146
Disposal Group, Including Discontinued Operation, Assets, Current	0	83
Total Current Assets	616,215	626,139
Property, Plant and Equipment:
Property, Plant and Equipment	13,518,261	13,771,388
Less-Accumulated Depreciation, Depletion and Amortization	5,695,342	5,630,949
Total Property, Plant and Equipment-Net	7,986,541	8,140,439
Other Assets:
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	197,385	190,964
Other	219,454	222,149
Deferred Income Taxes	44,174	4,290
Total Other Assets	461,013	417,403
Total Assets	9,063,769	9,183,981	$ 10,715,874
Current Liabilities:
Accounts Payable	270,739	241,616
Accounts Payable (Recoverable)- Related Parties	0	0
Current Portion of Long-Term Debt	11,851	12,000
Other Accrued Liabilities	704,367	680,348
Disposal Group, Including Discontinued Operation, Liabilities, Current	5,892	6,050
Total Current Liabilities	992,849	940,014
Long-Term Debt:	2,657,294	2,762,069
Deferred Credits and Other Liabilities
Postretirement Benefits Other Than Pensions	656,890	659,474
Pneumoconiosis	107,792	108,073
Mine Closing	224,055	218,631
Gas Well Closing	224,588	223,352
Workers' Compensation	66,429	67,277
Salary Retirement	108,485	112,543
Other Liabilities, Noncurrent	119,048	151,660
Total Deferred Credits and Other Liabilities	1,507,287	1,541,010
Total CONSOL Energy Inc. Stockholders' Equity	3,763,803	3,798,395
Stockholders' Equity Attributable to Noncontrolling Interest	142,536	142,493
TOTAL LIABILITIES AND EQUITY	9,063,769	9,183,981
Consolidation, Eliminations [Member]
Schedule of Condensed Consolidating Balance Sheets [Line Items]
Assets Held-for-sale, Long Lived, Fair Value Disclosure	0
Current Assets:
Cash and Cash Equivalents	0	0
Accounts and Notes Receivable:
Other Receivables, Net, Current	0	0
Trade	0	0
Inventories	0	0
Recoverable Income Taxes	0	0
Prepaid Expenses	0	0
Disposal Group, Including Discontinued Operation, Assets, Current		0
Total Current Assets	0	0
Property, Plant and Equipment:
Property, Plant and Equipment	0	0
Less-Accumulated Depreciation, Depletion and Amortization	0	0
Total Property, Plant and Equipment-Net	0	0
Other Assets:
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	(7,547,194)	(7,998,941)
Other	0	0
Deferred Income Taxes	0	0
Total Other Assets	(7,547,194)	(7,998,941)
Total Assets	(7,547,194)	(7,998,941)
Current Liabilities:
Accounts Payable	11,379	10,805
Accounts Payable (Recoverable)- Related Parties	(11,379)	(10,805)
Current Portion of Long-Term Debt	0	0
Other Accrued Liabilities	0	0
Disposal Group, Including Discontinued Operation, Liabilities, Current	0	0
Total Current Liabilities	0	0
Long-Term Debt:	0	0
Deferred Credits and Other Liabilities
Postretirement Benefits Other Than Pensions	0	0
Pneumoconiosis	0	0
Mine Closing	0	0
Gas Well Closing	0	0
Workers' Compensation	0	0
Salary Retirement	0	0
Other Liabilities, Noncurrent	0	0
Total Deferred Credits and Other Liabilities	0	0
Total CONSOL Energy Inc. Stockholders' Equity	(7,689,730)	(8,141,434)
Stockholders' Equity Attributable to Noncontrolling Interest	142,536	142,493
TOTAL LIABILITIES AND EQUITY	(7,547,194)	(7,998,941)
Parent Issuer [Member]
Schedule of Condensed Consolidating Balance Sheets [Line Items]
Assets Held-for-sale, Long Lived, Fair Value Disclosure	0
Current Assets:
Cash and Cash Equivalents	53,786	49,722
Accounts and Notes Receivable:
Other Receivables, Net, Current	46,992	20,097
Trade	0	0
Inventories	0	0
Recoverable Income Taxes	171,857	175,877
Prepaid Expenses	12,879	12,828
Disposal Group, Including Discontinued Operation, Assets, Current		0
Total Current Assets	285,514	258,524
Property, Plant and Equipment:
Property, Plant and Equipment	115,021	114,611
Less-Accumulated Depreciation, Depletion and Amortization	85,851	84,788
Total Property, Plant and Equipment-Net	29,170	29,823
Other Assets:
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	7,514,120	7,974,260
Other	19,206	19,960
Deferred Income Taxes	40,354	25,904
Total Other Assets	7,573,680	8,020,124
Total Assets	7,888,364	8,308,471
Current Liabilities:
Accounts Payable	15,629	48,666
Accounts Payable (Recoverable)- Related Parties	1,556,254	1,832,908
Current Portion of Long-Term Debt	1,511	1,533
Other Accrued Liabilities	103,235	75,039
Disposal Group, Including Discontinued Operation, Liabilities, Current	0	0
Total Current Liabilities	1,676,629	1,958,146
Long-Term Debt:	2,322,906	2,421,511
Deferred Credits and Other Liabilities
Postretirement Benefits Other Than Pensions	0	0
Pneumoconiosis	0	0
Mine Closing	0	0
Gas Well Closing	0	0
Workers' Compensation	0	0
Salary Retirement	108,485	112,543
Other Liabilities, Noncurrent	16,541	17,876
Total Deferred Credits and Other Liabilities	125,026	130,419
Total CONSOL Energy Inc. Stockholders' Equity	3,763,803	3,798,395
Stockholders' Equity Attributable to Noncontrolling Interest	0	0
TOTAL LIABILITIES AND EQUITY	7,888,364	8,308,471
CNX Gas Guarantor [Member]
Schedule of Condensed Consolidating Balance Sheets [Line Items]
Assets Held-for-sale, Long Lived, Fair Value Disclosure	163,622
Current Assets:
Cash and Cash Equivalents	85	83
Accounts and Notes Receivable:
Other Receivables, Net, Current	39,475	34,773
Trade	111,679	124,509
Inventories	14,551	15,301
Recoverable Income Taxes	(47,302)	(59,026)
Prepaid Expenses	12,502	60,500
Disposal Group, Including Discontinued Operation, Assets, Current		0
Total Current Assets	130,990	176,140
Property, Plant and Equipment:
Property, Plant and Equipment	8,591,319	8,851,226
Less-Accumulated Depreciation, Depletion and Amortization	3,126,778	3,106,296
Total Property, Plant and Equipment-Net	5,628,163	5,744,930
Other Assets:
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	194,607	188,376
Other	73,237	67,096
Deferred Income Taxes	3,820	(21,614)
Total Other Assets	271,664	233,858
Total Assets	6,030,817	6,154,928
Current Liabilities:
Accounts Payable	174,002	127,309
Accounts Payable (Recoverable)- Related Parties	980,682	1,034,138
Current Portion of Long-Term Debt	6,452	6,369
Other Accrued Liabilities	305,012	337,374
Disposal Group, Including Discontinued Operation, Liabilities, Current	0	0
Total Current Liabilities	1,466,148	1,505,190
Long-Term Debt:	25,265	26,884
Deferred Credits and Other Liabilities
Postretirement Benefits Other Than Pensions	0	0
Pneumoconiosis	0	0
Mine Closing	0	0
Gas Well Closing	196,473	195,704
Workers' Compensation	0	0
Salary Retirement	0	0
Other Liabilities, Noncurrent	89,783	117,658
Total Deferred Credits and Other Liabilities	286,256	313,362
Total CONSOL Energy Inc. Stockholders' Equity	4,253,148	4,309,492
Stockholders' Equity Attributable to Noncontrolling Interest	0	0
TOTAL LIABILITIES AND EQUITY	6,030,817	6,154,928
Other Guarantors Subsidiaries [Member]
Schedule of Condensed Consolidating Balance Sheets [Line Items]
Assets Held-for-sale, Long Lived, Fair Value Disclosure	0
Current Assets:
Cash and Cash Equivalents	0	0
Accounts and Notes Receivable:
Other Receivables, Net, Current	13,215	14,516
Trade	78,622	72,295
Inventories	42,351	38,669
Recoverable Income Taxes	0	0
Prepaid Expenses	15,600	16,306
Disposal Group, Including Discontinued Operation, Assets, Current		0
Total Current Assets	149,788	141,786
Property, Plant and Equipment:
Property, Plant and Equipment	3,932,232	3,928,861
Less-Accumulated Depreciation, Depletion and Amortization	2,030,186	1,997,687
Total Property, Plant and Equipment-Net	1,902,046	1,931,174
Other Assets:
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	35,852	27,269
Other	107,670	114,030
Deferred Income Taxes	0	0
Total Other Assets	143,522	141,299
Total Assets	2,195,356	2,214,259
Current Liabilities:
Accounts Payable	54,508	36,039
Accounts Payable (Recoverable)- Related Parties	(2,504,736)	(2,648,416)
Current Portion of Long-Term Debt	3,797	4,010
Other Accrued Liabilities	253,750	223,705
Disposal Group, Including Discontinued Operation, Liabilities, Current	0	0
Total Current Liabilities	(2,192,681)	(2,384,662)
Long-Term Debt:	114,925	115,685
Deferred Credits and Other Liabilities
Postretirement Benefits Other Than Pensions	656,890	659,474
Pneumoconiosis	105,456	106,016
Mine Closing	214,667	209,384
Gas Well Closing	28,013	27,549
Workers' Compensation	63,393	64,187
Salary Retirement	0	0
Other Liabilities, Noncurrent	12,271	15,663
Total Deferred Credits and Other Liabilities	1,080,690	1,082,273
Total CONSOL Energy Inc. Stockholders' Equity	3,192,422	3,400,963
Stockholders' Equity Attributable to Noncontrolling Interest	0	0
TOTAL LIABILITIES AND EQUITY	2,195,356	2,214,259
CNX Coal Resources LP [Member]
Schedule of Condensed Consolidating Balance Sheets [Line Items]
Assets Held-for-sale, Long Lived, Fair Value Disclosure	0
Current Assets:
Cash and Cash Equivalents	6,534	9,785
Accounts and Notes Receivable:
Other Receivables, Net, Current	1,267	515
Trade	25,028	23,418
Inventories	12,716	11,491
Recoverable Income Taxes	0	0
Prepaid Expenses	3,517	3,512
Disposal Group, Including Discontinued Operation, Assets, Current		0
Total Current Assets	49,062	48,721
Property, Plant and Equipment:
Property, Plant and Equipment	879,689	876,690
Less-Accumulated Depreciation, Depletion and Amortization	452,527	442,178
Total Property, Plant and Equipment-Net	427,162	434,512
Other Assets:
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	0	0
Other	19,341	21,063
Deferred Income Taxes	0	0
Total Other Assets	19,341	21,063
Total Assets	495,565	504,296
Current Liabilities:
Accounts Payable	15,221	18,797
Accounts Payable (Recoverable)- Related Parties	1,764	1,666
Current Portion of Long-Term Debt	91	88
Other Accrued Liabilities	42,370	44,230
Disposal Group, Including Discontinued Operation, Liabilities, Current	0	0
Total Current Liabilities	59,446	64,781
Long-Term Debt:	194,198	197,989
Deferred Credits and Other Liabilities
Postretirement Benefits Other Than Pensions	0	0
Pneumoconiosis	2,336	2,057
Mine Closing	9,388	9,247
Gas Well Closing	102	99
Workers' Compensation	3,036	3,090
Salary Retirement	0	0
Other Liabilities, Noncurrent	453	463
Total Deferred Credits and Other Liabilities	15,315	14,956
Total CONSOL Energy Inc. Stockholders' Equity	226,606	226,570
Stockholders' Equity Attributable to Noncontrolling Interest	0	0
TOTAL LIABILITIES AND EQUITY	495,565	504,296
Non-Guarantors [Member]
Schedule of Condensed Consolidating Balance Sheets [Line Items]
Assets Held-for-sale, Long Lived, Fair Value Disclosure	0
Current Assets:
Cash and Cash Equivalents	861	885
Accounts and Notes Receivable:
Other Receivables, Net, Current	0	0
Trade	0	0
Inventories	0	0
Recoverable Income Taxes	0	0
Prepaid Expenses	0	0
Disposal Group, Including Discontinued Operation, Assets, Current		83
Total Current Assets	861	968
Property, Plant and Equipment:
Property, Plant and Equipment	0	0
Less-Accumulated Depreciation, Depletion and Amortization	0	0
Total Property, Plant and Equipment-Net	0	0
Other Assets:
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	0	0
Other	0	0
Deferred Income Taxes	0	0
Total Other Assets	0	0
Total Assets	861	968
Current Liabilities:
Accounts Payable	0	0
Accounts Payable (Recoverable)- Related Parties	(22,585)	(209,491)
Current Portion of Long-Term Debt	0	0
Other Accrued Liabilities	0	0
Disposal Group, Including Discontinued Operation, Liabilities, Current	5,892	6,050
Total Current Liabilities	(16,693)	(203,441)
Long-Term Debt:	0	0
Deferred Credits and Other Liabilities
Postretirement Benefits Other Than Pensions	0	0
Pneumoconiosis	0	0
Mine Closing	0	0
Gas Well Closing	0	0
Workers' Compensation	0	0
Salary Retirement	0	0
Other Liabilities, Noncurrent	0	0
Total Deferred Credits and Other Liabilities	0	0
Total CONSOL Energy Inc. Stockholders' Equity	17,554	204,409
Stockholders' Equity Attributable to Noncontrolling Interest	0	0
TOTAL LIABILITIES AND EQUITY	$ 861	$ 968

Guarantor Subsidiaries, Condens

Guarantor Subsidiaries, Condensed Statement of Cash Flows (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Schedule of Condensed Consolidating Statement of Cash Flows [Line Items]
Net Cash Provided by (Used in) Operating Activities, Continuing Operations	$ 205,194	$ 123,662
Cash Provided by (Used in) Operating Activities, Discontinued Operations	(75)	6,290
Net Cash Provided by Operating Activities	205,119	129,952
Investing Activities:
Capital Expenditures	(112,978)	(77,656)
Proceeds from Sale of Productive Assets	19,427	8,453
Payments for (Proceeds from) Businesses and Interest in Affiliates	5,909	(5,578)
Payments for Advance to Affiliate		0
Net Cash Provided by (Used in) Investing Activities, Continuing Operations	(87,642)	(74,781)
Cash Provided by (Used in) Investing Activities, Discontinued Operations	0	395,757
Net Cash Provided by (Used in) Investing Activities	(87,642)	320,976
Financing Activities:
Repayments of Other Debt	(2,942)	(2,095)
(Payments on) Proceeds from Short-Term Borrowings	0	(100,500)
Treasury Stock Activity	(6,278)	(1,510)
Payments of Dividends	0	(2,294)
Noncontrolling Interest, Period Increase (Decrease)	(5,467)	(5,413)
Payments On Long Term Notes Including Redemption Premium	(98,243)	0
Proceeds from Issuance of Common Stock	494	3
Treasury Stock, Value, Acquired, Cost Method	(6,278)
Net Proceeds from Revolver - MLP	(4,000)	15,000
Payments of Debt Issuance Costs	(250)
Net Cash Provided by (Used in) Financing Activities, Continuing Operations	(116,686)	(96,809)
Cash Provided by (Used in) Financing Activities, Discontinued Operations	0	(47)
Net Cash (Used in) Provided by Financing Activities	(116,686)	(96,856)
Parent Issuer [Member]
Schedule of Condensed Consolidating Statement of Cash Flows [Line Items]
Net Cash Provided by (Used in) Operating Activities, Continuing Operations	109,039	456,851
Cash Provided by (Used in) Operating Activities, Discontinued Operations	0	0
Net Cash Provided by Operating Activities	109,039	456,851
Investing Activities:
Capital Expenditures	(1,087)	(1,281)
Proceeds from Sale of Productive Assets	0	0
Payments for (Proceeds from) Businesses and Interest in Affiliates	0	0
Payments for Advance to Affiliate		0
Net Cash Provided by (Used in) Investing Activities, Continuing Operations		(1,281)
Cash Provided by (Used in) Investing Activities, Discontinued Operations		0
Net Cash Provided by (Used in) Investing Activities	(1,087)	(1,281)
Financing Activities:
Repayments of Other Debt	(418)	(353)
(Payments on) Proceeds from Short-Term Borrowings		(100,500)
Treasury Stock Activity		(1,510)
Payments of Dividends		(2,294)
Noncontrolling Interest, Period Increase (Decrease)	0	0
Payments On Long Term Notes Including Redemption Premium	(98,243)
Proceeds from Issuance of Common Stock	494	3
Treasury Stock, Value, Acquired, Cost Method	(5,471)
Net Proceeds from Revolver - MLP	0	0
Payments of Debt Issuance Costs	250
Net Cash Provided by (Used in) Financing Activities, Continuing Operations		(104,654)
Cash Provided by (Used in) Financing Activities, Discontinued Operations		0
Net Cash (Used in) Provided by Financing Activities	(103,888)	(104,654)
CNX Gas Guarantor [Member]
Schedule of Condensed Consolidating Statement of Cash Flows [Line Items]
Net Cash Provided by (Used in) Operating Activities, Continuing Operations	87,898	58,594
Cash Provided by (Used in) Operating Activities, Discontinued Operations	0	0
Net Cash Provided by Operating Activities	87,898	58,594
Investing Activities:
Capital Expenditures	(100,793)	(62,862)
Proceeds from Sale of Productive Assets	8,518	7,953
Payments for (Proceeds from) Businesses and Interest in Affiliates	5,909	(2,145)
Payments for Advance to Affiliate		0
Net Cash Provided by (Used in) Investing Activities, Continuing Operations		(57,054)
Cash Provided by (Used in) Investing Activities, Discontinued Operations		0
Net Cash Provided by (Used in) Investing Activities	(86,366)	(57,054)
Financing Activities:
Repayments of Other Debt	(1,530)	(1,537)
(Payments on) Proceeds from Short-Term Borrowings		0
Treasury Stock Activity		0
Payments of Dividends		0
Noncontrolling Interest, Period Increase (Decrease)	0	0
Payments On Long Term Notes Including Redemption Premium	0
Proceeds from Issuance of Common Stock	0	0
Treasury Stock, Value, Acquired, Cost Method	0
Net Proceeds from Revolver - MLP	0	0
Payments of Debt Issuance Costs	0
Net Cash Provided by (Used in) Financing Activities, Continuing Operations		(1,537)
Cash Provided by (Used in) Financing Activities, Discontinued Operations		0
Net Cash (Used in) Provided by Financing Activities	(1,530)	(1,537)
Other Guarantors Subsidiaries [Member]
Schedule of Condensed Consolidating Statement of Cash Flows [Line Items]
Net Cash Provided by (Used in) Operating Activities, Continuing Operations	(873)	13,434
Cash Provided by (Used in) Operating Activities, Discontinued Operations	0	0
Net Cash Provided by Operating Activities	(873)	13,434
Investing Activities:
Capital Expenditures	(9,068)	(10,288)
Proceeds from Sale of Productive Assets	10,909	480
Payments for (Proceeds from) Businesses and Interest in Affiliates	0	(3,433)
Payments for Advance to Affiliate		0
Net Cash Provided by (Used in) Investing Activities, Continuing Operations		(13,241)
Cash Provided by (Used in) Investing Activities, Discontinued Operations		0
Net Cash Provided by (Used in) Investing Activities	1,841	(13,241)
Financing Activities:
Repayments of Other Debt	(968)	(193)
(Payments on) Proceeds from Short-Term Borrowings		0
Treasury Stock Activity		0
Payments of Dividends		0
Noncontrolling Interest, Period Increase (Decrease)	0	0
Payments On Long Term Notes Including Redemption Premium	0
Proceeds from Issuance of Common Stock	0	0
Treasury Stock, Value, Acquired, Cost Method	0
Net Proceeds from Revolver - MLP	0	0
Payments of Debt Issuance Costs	0
Net Cash Provided by (Used in) Financing Activities, Continuing Operations		(193)
Cash Provided by (Used in) Financing Activities, Discontinued Operations		0
Net Cash (Used in) Provided by Financing Activities	(968)	(193)
CNX Coal Resources LP [Member]
Schedule of Condensed Consolidating Statement of Cash Flows [Line Items]
Net Cash Provided by (Used in) Operating Activities, Continuing Operations	17,662	3,511
Cash Provided by (Used in) Operating Activities, Discontinued Operations	0	0
Net Cash Provided by Operating Activities	17,662	3,511
Investing Activities:
Capital Expenditures	(2,030)	(3,225)
Proceeds from Sale of Productive Assets	0	20
Payments for (Proceeds from) Businesses and Interest in Affiliates	0	0
Net Cash Provided by (Used in) Investing Activities, Continuing Operations		(3,205)
Cash Provided by (Used in) Investing Activities, Discontinued Operations		0
Net Cash Provided by (Used in) Investing Activities	(2,030)	(3,205)
Financing Activities:
Repayments of Other Debt	(26)	(12)
(Payments on) Proceeds from Short-Term Borrowings		0
Treasury Stock Activity		0
Payments of Dividends		0
Noncontrolling Interest, Period Increase (Decrease)	(14,050)	(12,144)
Proceeds from Collection of Advance to Affiliate		(550)
Payments On Long Term Notes Including Redemption Premium	0
Proceeds from Issuance of Common Stock	0	0
Treasury Stock, Value, Acquired, Cost Method	(807)
Net Proceeds from Revolver - MLP	(4,000)	15,000
Payments of Debt Issuance Costs	0
Net Cash Provided by (Used in) Financing Activities, Continuing Operations		(2,294)
Cash Provided by (Used in) Financing Activities, Discontinued Operations		0
Net Cash (Used in) Provided by Financing Activities	(18,883)	2,294
Non-Guarantors [Member]
Schedule of Condensed Consolidating Statement of Cash Flows [Line Items]
Net Cash Provided by (Used in) Operating Activities, Continuing Operations	51	(401,447)
Cash Provided by (Used in) Operating Activities, Discontinued Operations	(75)	6,290
Net Cash Provided by Operating Activities	(24)	(395,157)
Investing Activities:
Capital Expenditures	0	0
Proceeds from Sale of Productive Assets	0	0
Payments for (Proceeds from) Businesses and Interest in Affiliates	0	0
Payments for Advance to Affiliate		0
Net Cash Provided by (Used in) Investing Activities, Continuing Operations		0
Cash Provided by (Used in) Investing Activities, Discontinued Operations		395,757
Net Cash Provided by (Used in) Investing Activities	0	395,757
Financing Activities:
Repayments of Other Debt	0	0
(Payments on) Proceeds from Short-Term Borrowings		0
Treasury Stock Activity		0
Payments of Dividends		0
Noncontrolling Interest, Period Increase (Decrease)	0	0
Payments On Long Term Notes Including Redemption Premium	0
Proceeds from Issuance of Common Stock	0	0
Treasury Stock, Value, Acquired, Cost Method
Net Proceeds from Revolver - MLP	0	0
Payments of Debt Issuance Costs	0
Net Cash Provided by (Used in) Financing Activities, Continuing Operations		0
Cash Provided by (Used in) Financing Activities, Discontinued Operations		(47)
Net Cash (Used in) Provided by Financing Activities	0	(47)
Consolidation, Eliminations [Member]
Schedule of Condensed Consolidating Statement of Cash Flows [Line Items]
Net Cash Provided by (Used in) Operating Activities, Continuing Operations	(8,583)	(7,281)
Cash Provided by (Used in) Operating Activities, Discontinued Operations	0	0
Net Cash Provided by Operating Activities	(8,583)	(7,281)
Investing Activities:
Capital Expenditures	0	0
Proceeds from Sale of Productive Assets	0	0
Payments for (Proceeds from) Businesses and Interest in Affiliates	0	0
Net Cash Provided by (Used in) Investing Activities, Continuing Operations		0
Cash Provided by (Used in) Investing Activities, Discontinued Operations		0
Net Cash Provided by (Used in) Investing Activities	0	0
Financing Activities:
Repayments of Other Debt	0	0
(Payments on) Proceeds from Short-Term Borrowings		0
Treasury Stock Activity		0
Payments of Dividends		0
Noncontrolling Interest, Period Increase (Decrease)	8,583	6,731
Proceeds from Collection of Advance to Affiliate		550
Payments On Long Term Notes Including Redemption Premium	0
Proceeds from Issuance of Common Stock	0	0
Treasury Stock, Value, Acquired, Cost Method
Net Proceeds from Revolver - MLP	0	0
Payments of Debt Issuance Costs	0
Net Cash Provided by (Used in) Financing Activities, Continuing Operations		7,281
Cash Provided by (Used in) Financing Activities, Discontinued Operations		0
Net Cash (Used in) Provided by Financing Activities	$ 8,583	$ 7,281

Guarantor Subsidiaries Financ66

Guarantor Subsidiaries Financial Information Gurantor Subsidiaries Statement of Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Net Income (Loss) Attributable to Parent [Abstract]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$ (33,502)	$ (96,458)
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax, Portion Attributable to Parent [Abstract]
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	3,502	(2,484)
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net		(9,814)
Other Comprehensive Income (Loss), Net of Tax	3,502	(12,298)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	(30,000)	(108,756)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Noncontrolling Interest	5,452	1,114
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	(35,452)	(109,870)
Parent Issuer [Member]
Net Income (Loss) Attributable to Parent [Abstract]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	(38,966)	(97,572)
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax, Portion Attributable to Parent [Abstract]
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	3,502	(2,484)
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	0	(9,814)
Other Comprehensive Income (Loss), Net of Tax	3,502	(12,298)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	(35,464)	(109,870)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Noncontrolling Interest	0	0
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	(35,464)	(109,870)
CNX Gas Guarantor [Member]
Net Income (Loss) Attributable to Parent [Abstract]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	(56,344)	(13,524)
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax, Portion Attributable to Parent [Abstract]
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	0	0
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net		(9,814)
Other Comprehensive Income (Loss), Net of Tax	0	(9,814)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	(56,344)	(23,338)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Noncontrolling Interest	0	0
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	(56,344)	(23,338)
Other Guarantors Subsidiaries [Member]
Net Income (Loss) Attributable to Parent [Abstract]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	39,256	(2,212)
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax, Portion Attributable to Parent [Abstract]
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	3,541	(2,459)
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net		0
Other Comprehensive Income (Loss), Net of Tax	3,541	(2,459)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	42,797	(4,671)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Noncontrolling Interest	0	0
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	42,797	(4,671)
CNX Coal Resources LP [Member]
Net Income (Loss) Attributable to Parent [Abstract]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	14,066	3,816
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax, Portion Attributable to Parent [Abstract]
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	(39)	(25)
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net		0
Other Comprehensive Income (Loss), Net of Tax	(39)	(25)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	14,027	3,791
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Noncontrolling Interest	0	0
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	14,027	3,791
Non-Guarantors [Member]
Net Income (Loss) Attributable to Parent [Abstract]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	0	(53,181)
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax, Portion Attributable to Parent [Abstract]
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	0	0
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net		0
Other Comprehensive Income (Loss), Net of Tax	0	0
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	0	(53,181)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Noncontrolling Interest	0	0
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	0	(53,181)
Consolidation, Eliminations [Member]
Net Income (Loss) Attributable to Parent [Abstract]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	8,486	66,215
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax, Portion Attributable to Parent [Abstract]
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	(3,502)	2,484
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net		9,814
Other Comprehensive Income (Loss), Net of Tax	(3,502)	12,298
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	4,984	78,513
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Noncontrolling Interest	5,452	1,114
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	$ (468)	$ 77,399

Related Party Transaction (Deta

Related Party Transaction (Details) - USD ($)	3 Months Ended		9 Months Ended	12 Months Ended
Related Party Transaction (Details) - USD ($)	Mar. 31, 2017	Mar. 31, 2016	Sep. 30, 2014	Dec. 31, 2016
Related Party Transaction [Line Items]
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	$ 197,385,000			$ 190,964,000
Other General Expense	100,126,000	$ 95,064,000
Income (Loss) from Equity Method Investments	$ (12,330,000)	(16,665,000)
Partners' Capital Account, Units, Sold in Public Offering	5,000,000
Initial Public Offering Share Price	$ 15
Initial Public Offering overallotment	561,067
Debt Instrument, Face Amount	$ 400,000,000
Long-term Debt	2,622,358,000			2,724,672,000
Financing Related Fees	3,000,000
Long-term debt, net of fees	197,000,000
Net Proceeds from Initial Public Offering	342,711,000
Cash paid for additional interest	$ 21,500,000
Preferred Units, Issued	3,956,496
Preferred Stock, Par or Stated Value Per Share	$ 17.01
Other Significant Noncash Transaction, Value of Consideration Given	$ 67,300,000
volume weighted average trading price	$ 14.79
Accounts Payable, Related Parties	$ 1,764,000,000			1,666,000,000
CONE Gathering [Member]
Related Party Transaction [Line Items]
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	152,941,000			151,075,000
Distribution Made to Limited Partner, Cash Distributions Paid	0
Income (Loss) from Equity Method Investments	2,000	6,000
Related Party Transaction, Expenses from Transactions with Related Party	0	217
Equity Method Investment Summarized Financial Information, Equity	1,866,000
CONE Midstream [Member]
Related Party Transaction [Line Items]
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	22,296,000			18,133,000
Sale of Stock, Description of Transaction			20,125,000
Excess Stock, Shares Authorized			2,625,000
Distribution Made to Limited Partner, Cash Distributions Paid	(5,909,000)
Income (Loss) from Equity Method Investments	10,000	8,000
Related Party Transaction, Expenses from Transactions with Related Party	34,054	31,645
Total Purchase Consideration of Drop				248,000,000
Equity Method Investment, Cash Consideration for Drop				$ 140,000,000
Equity Method Investment, Stock Issued on Drop				5,200,000
Equity Method Investment Summarized Financial Information, Equity	10,072,000
CONE [Member]
Related Party Transaction [Line Items]
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	175,237,000			$ 169,208,000
Distribution Made to Limited Partner, Cash Distributions Paid	(5,909,000)
Due from Related Parties	8,000			$ 6,000
Equity Method Investment Summarized Financial Information, Equity	11,938,000
CNX Coal Resources LP [Member]
Related Party Transaction [Line Items]
Proceeds from Issuance Initial Public Offering	75,000,000
Long-term Debt	200,000,000
Operating and Other Costs [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party	872,000	1,266,000
Selling and Direct Administrative Expenses [Member] [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party	$ 717,000	$ 1,116,000

Subsequent Event (Details)

Subsequent Event (Details) - USD ($) $ in Thousands	3 Months Ended
Subsequent Event (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Mar. 31, 2017
Subsequent Event [Line Items]
Proceeds from Sale of Property Held-for-sale		$ 402,799
Knox and Coalfield [Member]
Subsequent Event [Line Items]
Proceeds from Sale of Property Held-for-sale	$ 18,944
Gain (Loss) on Sale of Properties	500
Utica-Point Pleasant Shale [Member]
Subsequent Event [Line Items]
Proceeds from Sale of Property Held-for-sale	76,696
Gain (Loss) on Sale of Properties	$ 72,000