CNX Resources (CNX) 10-Q 1 Nov 16 2016 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2016	Oct. 17, 2016
Document Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2016
Document Fiscal Year Focus	2,016
Document Fiscal Period Focus	Q3
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		229,440,368

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Mar. 31, 2015	Sep. 30, 2016	Sep. 30, 2015
Income Statement [Abstract]
Natural Gas, NGLs and Oil Sales	$ 205,913	$ 157,538		$ 555,101	$ 541,630
Unrealized Gain (Loss) on Commodity Derivatives	198,192	143,606		53,872	251,073
Coal Sales	267,685	323,171		744,411	1,026,596
Other Revenue, Net	4,714	5,129		20,687	24,596
Purchased Gas Sales	12,086	2,535		28,633	7,649
Freight-Outside	9,392	2,436		33,949	10,204
Other Income (including equity earnings)	32,393	38,475		114,159	111,279
Gain (Loss) on Sale of Assets	15,203	48,043		13,541	54,329
Total Revenue and Other Income	745,578	720,933		1,564,353	2,027,356
Oil and Gas Property, Lease Operating Expense	22,602	29,452		73,996	96,229
Gas Gathering, Transportation, Marketing and Processing Costs	94,796	89,965		279,753	248,682
Production Tax Expense	9,027	8,475		23,732	24,605
E&P Depreciation, Depletion, and Amortization	101,257	92,083		312,122	269,377
Exploration and Production Costs	384	3,332		5,036	7,695
Production Royalty Interests and Purchased Gas Costs	11,940	1,921		28,692	5,939
Other Expenses	21,760	20,953		65,980	47,088
Impairment of Oil and Gas Properties	0	0		0	828,905
Results of Operations, General and Administrative Related to Oil and Gas Producing Activities	26,198	23,919		74,067	80,396
Oil and Gas Production Expense	287,964	270,100		863,378	1,608,916
Operating Expenses	182,717	137,759		521,277	564,604
Coal Depreciation, Depletion, Amortization	42,370	43,459		125,334	136,536
Freight Expense	9,392	2,436		33,949	10,204
General and Administrative Expense	7,653	9,044		20,207	34,231
Cost of Coal Products and Services	242,132	192,698		700,767	745,575
Other Nonoperating Expense	40,085	(3,078)		127,531	70,554
Depreciation, Depletion and Amortization, Nonproduction	8,085	11,302		4,463	21,219
Gains (Losses) on Extinguishment of Debt	0	0	$ 17	0	67,751
Interest Expense	47,317	48,558		144,609	150,185
Other General Expense	100,056	62,955		286,776	319,655
Total Costs	630,152	525,753		1,850,921	2,674,146
Income (Loss) from Continuing Operations before Income Taxes, Domestic	115,426	195,180		(286,568)	(646,790)
Income Tax Expense (Benefit)	52,858	65,868		(71,798)	(251,181)
Income (Loss) from Continuing Operations Attributable to Parent	62,568	129,312		(214,770)	(395,609)
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent	(34,975)	(3,842)		(322,747)	(3,192)
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	27,593	125,470		(537,517)	(398,801)
Net Income (Loss) Attributable to Noncontrolling Interest	2,248	6,490		4,541	6,490
Net Income (Loss)	$ 25,345	$ 118,980		$ (542,058)	$ (405,291)

Consolidated Statements of Inc3

Consolidated Statements of Income Earnings Per Share - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Earnings Per Share [Abstract]
Income (Loss) from Continuing Operations, Per Basic Share	$ 0.26	$ 0.54	$ (0.96)	$ (1.75)
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share	(0.15)	(0.02)	(1.40)	(0.02)
Earnings Per Share, Basic	0.11	0.52	(2.36)	(1.77)
Income (Loss) from Continuing Operations, Per Diluted Share	0.26	0.54	(0.96)	(1.75)
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share	(0.15)	(0.02)	(1.40)	(0.02)
Earnings Per Share, Diluted	0.11	0.52	(2.36)	(1.77)
Common Stock, Dividends, Per Share, Cash Paid	$ 0	$ 0.01	$ 0.0100	$ 0.1350

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Condensed Statement of Income Captions [Line Items]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$ 27,593	$ 125,470	$ (537,517)	$ (398,801)
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	1,305	(49,353)	6,866	(40,036)
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	(12,458)	(20,602)	(33,475)	(60,720)
Other Comprehensive Income (Loss), Net of Tax	(11,153)	(69,955)	(26,609)	(100,756)
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	16,440	55,515	(564,126)	(499,557)
Net Income (Loss) Attributable to Noncontrolling Interest	2,248	6,490	4,541	6,490
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract]
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	$ 14,192	$ 49,025	$ (568,667)	$ (506,047)

Consolidated Statements of Com5

Consolidated Statements of Comprehensive Income (Parentheticals) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Adjustment For Actuarially Determined Liabilities [Member]
Other Comprehensive Income (Loss), Tax	$ (1,043)	$ 29,720	$ (5,369)	$ 24,935
Cash Flow Hedging [Member]
Other Comprehensive Income (Loss), Tax	$ 7,139	$ 11,807	$ 19,284	$ 35,123

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Current Assets:
Cash and Cash Equivalents	$ 80,247	$ 72,574
Accounts and Notes Receivable:
Trade	163,955	151,383
Other Receivables, Net, Current	80,490	121,735
Inventories	62,622	66,792
Recoverable Income Taxes	0	13,887
Prepaid Expenses	125,490	297,287
Disposal Group, Including Discontinued Operation, Assets, Current	2,111	81,106
Total Current Assets	514,915	804,764
Property, Plant and Equipment:
Property, Plant and Equipment	13,920,715	13,794,907
Less-Accumulated Depreciation, Depletion and Amortization	5,506,096	5,062,201
Disposal Group, Including Discontinued Operation, Property, Plant and Equipment	0	936,670
Total Property, Plant and Equipment-Net	8,414,619	9,669,376
Other Assets:
Deferred Income Taxes	149,680	0
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	257,423	237,330
Other	228,857	214,388
Disposal Group, Including Discontinued Operation, Other Assets, Noncurrent	0	4,044
Total Other Assets	635,960	455,762
Total Assets	9,565,494	10,929,902
Current Liabilities:
Accounts Payable	197,479	250,609
Current Portion of Long-Term Debt	4,470	4,988
Notes and Loans Payable, Current	354,000	952,000
Accrued Income Taxes, Current	5,485	0
Other Accrued Liabilities	508,144	421,827
Disposal Group, Including Discontinued Operation, Liabilities, Current	664	51,514
Total Current Liabilities	1,070,242	1,680,938
Long-Term Debt:
Long-Term Debt	2,734,004	2,708,320
Capital Lease Obligations	29,805	34,884
Disposal Group, Including Discontinued Operation, Liabilities, Noncurrent	0	5,001
Total Long-Term Debt	2,763,809	2,748,205
Deferred Credits and Other Liabilities
Deferred Tax Liabilities, Net, Noncurrent	0	74,629
Postretirement Benefits Other Than Pensions	613,233	630,892
Pneumoconiosis Benefits	117,586	111,903
Mine Closing	216,232	227,339
Gas Well Closing	164,115	163,842
Workers' Compensation	68,587	69,812
Salary Retirement	89,305	91,596
Reclamation	0	25
Other Liabilities, Noncurrent	172,218	166,957
Disposal Group, Including Discontinued Operation, Other Liabilities	0	107,988
Total Deferred Credits and Other Liabilities	1,441,276	1,644,983
TOTAL LIABILITIES	5,275,327	6,074,126
Stockholders' Equity:
Common Stock, $.01 Par Value; 500,000,000 Shares Authorized, 229,433,854 Issued and Outstanding at June 30, 2016; 229,054,236 Issued and Outstanding at December 31, 2015	2,298	2,294
Capital in Excess of Par Value	2,453,275	2,435,497
Preferred Stock, 15,000,000 shares authorized, None issued and outstanding	0	0
Retained Earnings	2,033,849	2,579,834
Accumulated Other Comprehensive Loss	(342,207)	(315,598)
Stockholders' Equity Attributable to Parent	4,147,215	4,702,027
Stockholders' Equity Attributable to Noncontrolling Interest	142,952	153,749
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	4,290,167	4,855,776
TOTAL LIABILITIES AND EQUITY	$ 9,565,494	$ 10,929,902

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parentheticals) - $ / shares	Sep. 30, 2016	Dec. 31, 2015
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	229,438,910	229,054,236
Common Stock, Shares, Outstanding	229,438,910	229,054,236
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 - 9 months ended Sep. 30, 2016 - 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, 2015	$ 4,855,776	$ 2,294	$ 2,435,497	$ 2,579,834	$ (315,598)	$ 4,702,027	$ 153,749
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	(537,517)	0	0	(542,058)	0	(542,058)	4,541
Net Income (Loss)	(542,058)
Other Comprehensive Income (Loss), Net of Tax	(26,609)	0	0	0	(26,609)	(26,609)	0
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	(564,126)	0	0	(542,058)	(26,609)	(568,667)	4,541
Proceeds from Issuance of Common Stock	4	4	0	0	0	4	0
Stock Granted, Value, Share-based Compensation, Forfeited	(1,633)	0	0	(1,633)	0	(1,633)	0
Adjustments to Additional Paid in Capital, Income Tax Deficiency from Share-based Compensation	(5,144)	0	(5,144)	0	0	(5,144)	0
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition	23,825	0	22,922	0	0	22,922	903
Noncontrolling Interest, Period Increase (Decrease)	(16,241)	0	0	0	0	0	(16,241)
Dividends, Cash	(2,294)	0	0	2,294	0	2,294	0
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest at Sep. 30, 2016	$ 4,290,167	$ 2,298	$ 2,453,275	$ 2,033,849	$ (342,207)	$ 4,147,215	$ 142,952

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Noncontrolling Interest, Period Increase (Decrease)	$ (16,241)	$ 0
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	(537,517)	(398,801)
Adjustments to Reconcile Net Income to Net Cash Provided By Operating Activities:
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent	322,747	3,192
Depreciation, Depletion and Amortization	441,919	427,132
Impairment of Oil and Gas Properties	0	828,905
Non-Cash Other Post-Employment Benefits	0	(151,871)
Stock-Based Compensation	23,825	19,849
(Gain) Loss on Sale of Assets	(13,541)	(54,329)
Gains (Losses) on Extinguishment of Debt	0	67,751
Gain (Loss) on Hedging Activity	(53,872)	(251,073)
Increase (Decrease) Cash Collateral from Counterparties	203,303	116,868
Deferred Income Taxes	(72,866)	(273,497)
Equity in Earnings of Affiliates	(41,239)	(38,838)
Proceeds from Equity Method Investment, Dividends or Distributions, Return of Capital	22,268	31,111
Changes in Operating Assets:
Accounts and Notes Receivable	4,555	119,064
Inventories	4,169	(9,922)
Prepaid Expenses	71,423	103,466
Changes in Other Assets	(14,241)	22,483
Changes in Operating Liabilities:
Accounts Payable	(12,654)	(123,171)
Increase (Decrease) in Interest Payable, Net	35,985	63,879
Other Operating Liabilities	(21,370)	(105,692)
Changes in Other Liabilities	(2,620)	(12,360)
Other	11,937	9,369
Net Cash Provided by (Used in) Operating Activities, Continuing Operations	372,211	393,515
Cash Provided by (Used in) Operating Activities, Discontinued Operations	14,427	10,768
Net Cash Provided by Operating Activities	386,638	404,283
Investing Activities:
Capital Expenditures	(179,389)	(864,262)
Proceeds from Sale of Productive Assets	38,977	83,044
Net Investment in Equity Affiliates	(4,555)	(70,224)
Net Cash Provided by (Used in) Investing Activities, Continuing Operations	(144,967)	(851,442)
Cash Provided by (Used in) Investing Activities, Discontinued Operations	366,251	(30,894)
Net Cash Used in Investing Activities	221,284	(882,336)
Financing Activities:
(Payments on) Proceeds from Short-Term Borrowings	(598,000)	945,000
Payments on Miscellaneous Borrowings	(6,222)	(1,523)
Payments On Long Term Notes Including Redemption Premium	0	(1,263,719)
Net Proceeds from Revolver - MLP	23,000	180,000
Proceeds from Issuance of Long-Term Notes	0	492,760
Tax Benefit from Stock-Based Compensation	0	208
Dividends Paid	(2,294)	(30,991)
Proceeds from Issuance of Common Stock	4	8,288
Treasury Stock, Retired, Cost Method, Amount	0	(71,674)
Debt Issuance and Financing Fees	(482)	(22,586)
Net Cash Provided by (Used in) Financing Activities, Continuing Operations	(600,235)	384,122
Cash Provided by (Used in) Financing Activities, Discontinued Operations	(14)	(39)
Net Cash (Used in) Provided by Financing Activities	(600,249)	384,083
Proceeds from Sale of Interest in Partnership Unit	0	148,359
Net Increase in Cash and Cash Equivalents	7,673	(93,970)
Cash and Cash Equivalents, at Carrying Value	72,574	176,985
Cash and Cash Equivalents at End of Period	$ 80,247	$ 83,015

Basis of Presentation

Basis of Presentation	9 Months Ended
	Sep. 30, 2016
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 and nine months ended September 30, 2016 are not necessarily indicative of the results that may be expected for future periods. The Consolidated Balance Sheet at December 31, 2015 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, 2015 included in CONSOL Energy Inc.'s Annual Report on Form 10-K. During the nine months ended September 30, 2016 , CONSOL Energy Inc. ("CONSOL Energy" or "the Company") made certain adjustments to the financial statements to reflect the sale of the Buchanan Mine and the Fola and Miller Creek Mining Complexes, which are now reflected under discontinued operations. Additionally, CONSOL Energy made reclassifications within its financial statements to better align the Company's financial reporting with its peer group. These reclassifications impacted the Lease Operating Expense, Transportation, Gathering and Compression, Direct Administrative and Selling, Production Royalty Interests and Purchased Gas Sales, Production Royalty Interests and Purchased Gas Costs, Operating and Other Costs and Selling, General and Administrative Costs line items on the Company's Consolidated Statements of Income. These changes are reflected in CONSOL Energy's current and historic Consolidated Statements of Income, with no effect on previously reported net income or stockholders’ equity. Basic earnings per share are computed by dividing net income attributable to CONSOL Energy 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. CONSOL Energy includes the impact of pro forma deferred tax assets in determining potential windfalls and shortfalls for purposes of calculating assumed proceeds under the treasury stock method. 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 September 30, For the Nine Months Ended September 30, 2016 2015 2016 2015 Anti-Dilutive Options 2,989,610 3,650,864 6,230,099 3,650,864 Anti-Dilutive Restricted Stock Units 3,455 785,585 645,302 1,394,115 Anti-Dilutive Performance Share Units 1,659,014 — 2,326,120 — Anti-Dilutive Performance Stock Options 802,804 802,804 802,804 802,804 5,454,883 5,239,253 10,004,325 5,847,783 The table below sets forth the share-based awards that have been exercised or released: For the Three Months Ended September 30, For the Nine Months Ended September 30, 2016 2015 2016 2015 Options — — — 363,620 Restricted Stock Units 5,920 90,055 574,310 576,562 Performance Share Units — — — 497,134 5,920 90,055 574,310 1,437,316 No options were exercised during the three and nine months ended September 30, 2016 or during the three months ended September 30, 2015 . The weighted average exercise price per share of the options exercised during the nine months ended September 30, 2015 was $22.78 . The computations for basic and dilutive earnings per share are as follows: For the Three Months Ended September 30, For the Nine Months Ended September 30, 2016 2015 2016 2015 Income (Loss) from Continuing Operations $ 62,568 $ 129,312 $ (214,770 ) $ (395,609 ) Loss from Discontinued Operations (34,975 ) (3,842 ) (322,747 ) (3,192 ) Net Income (Loss) $ 27,593 $ 125,470 $ (537,517 ) $ (398,801 ) Net Income Attributable to Noncontrolling Interest 2,248 6,490 4,541 6,490 Net Income (Loss) Attributable to CONSOL Energy Shareholders $ 25,345 $ 118,980 $ (542,058 ) $ (405,291 ) Weighted Average Shares of Common Stock Outstanding: Basic 229,438,612 229,036,172 229,369,309 229,230,571 Effect of Stock-Based Compensation Awards 2,079,973 315,955 — — Dilutive 231,518,585 229,352,127 229,369,309 229,230,571 Income (Loss) per Share: Basic (Continuing Operations) $ 0.26 $ 0.54 $ (0.96 ) $ (1.75 ) Basic (Discontinued Operations) (0.15 ) (0.02 ) (1.40 ) (0.02 ) Total Basic $ 0.11 $ 0.52 $ (2.36 ) $ (1.77 ) Dilutive (Continuing Operations) $ 0.26 $ 0.54 $ (0.96 ) $ (1.75 ) Dilutive (Discontinued Operations) (0.15 ) (0.02 ) (1.40 ) (0.02 ) Total Dilutive $ 0.11 $ 0.52 $ (2.36 ) $ (1.77 ) Changes in Accumulated Other Comprehensive Loss by component, net of tax, were as follows: Gains on Cash Flow Hedges Postretirement Benefits Total Balance at December 31, 2015 $ 43,470 $ (359,068 ) $ (315,598 ) Other Comprehensive Loss before Reclassifications — (13,912 ) (13,912 ) Amounts reclassified from Accumulated Other Comprehensive Loss (33,475 ) 20,778 (12,697 ) Current period Other Comprehensive (Loss) Income (33,475 ) 6,866 (26,609 ) Balance at September 30, 2016 $ 9,995 $ (352,202 ) $ (342,207 ) The following table shows the reclassification of adjustments out of Accumulated Other Comprehensive Loss: For the Three Months Ended September 30, For the Nine Months Ended September 30, 2016 2015 2016 2015 Derivative Instruments (Note 14) Natural Gas Price Swaps and Options $ (19,597 ) $ (32,409 ) $ (52,759 ) $ (95,843 ) Tax Expense 7,139 11,807 19,284 35,123 Net of Tax $ (12,458 ) $ (20,602 ) $ (33,475 ) $ (60,720 ) Actuarially Determined Long-Term Liability Adjustments* (Note 5 and Note 6) Amortization of Prior Service Costs $ (148 ) $ (133,851 ) $ (443 ) $ (203,159 ) Recognized Net Actuarial Loss 6,332 41,755 17,549 80,497 Curtailment Loss — 5 — 5 Settlement Loss 3,651 3,132 17,347 3,132 Total 9,835 (88,959 ) 34,453 (119,525 ) Tax (Benefit) Expense (3,664 ) 33,436 (12,861 ) 44,923 Net of Tax $ 6,171 $ (55,523 ) $ 21,592 $ (74,602 )

Discontinued Operations (Notes)

Discontinued Operations (Notes)	9 Months Ended
	Sep. 30, 2016
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 Mining Complex 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 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 the permits to transfer). These amounts were included in Net Cash Provided by Discontinued Investing Activities on the Consolidated Statements of Cash Flow. In addition, CONSOL Energy will pay a total of $17,200 in installments over the next four years. The net loss on sale of $53,130 , excluding the related impairment charge discussed below, was included in Loss from Discontinued Operations, net on the Consolidated Statements of Income. Prior to the closing, the Miller Creek and Fola Mining Complexes were classified as held for sale in discontinued operations and in accordance with the accounting guidance for Property, Plant and Equipment, assets held for sale are measured at the lower of the carrying value or fair value less costs to sell. Upon meeting the assets held for sale criteria, the Company determined the carrying value of the Fola and Miller Creek mining complexes exceeded the fair value less costs to sell. As a result, an impairment charge of $355,681 was recorded during the nine months ended September 30, 2016 . This impairment is included in the 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 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. 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 Flow. 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 all periods presented in the accompanying Consolidated Statements of Income, BMC along with the various other assets and the Fola and Miller Creek 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 September 30, For the Nine Months Ended September 30, 2016 2015 2016 2015 Coal Sales $ 6,974 $ 80,432 $ 102,904 $ 286,557 Freight-Outside Coal 305 783 1,322 3,791 Miscellaneous Other Income 2,204 3 2,237 33 Gain (Loss) on Sale of Assets (53,119 ) 80 (91,372 ) 274 Total Revenue and Other Income $ (43,636 ) $ 81,298 $ 15,091 $ 290,655 Total Costs 11,789 92,865 124,865 302,055 Loss From Operations Before Income Taxes $ (55,425 ) $ (11,567 ) $ (109,774 ) $ (11,400 ) Impairment on Assets Held for Sale — — 355,681 — Income Tax Benefit (20,450 ) (7,725 ) (142,708 ) (8,208 ) Loss From Discontinued Operations, net $ (34,975 ) $ (3,842 ) $ (322,747 ) $ (3,192 ) The major classes of assets and liabilities of discontinued operations: September 30, December 31, Assets: Accounts Receivable - Trade $ 2,107 $ 49,125 Inventories — 30,646 Prepaid Expense — 970 Other Current Assets 4 365 Total Current Assets $ 2,111 $ 81,106 Property, Plant and Equipment, Net — 936,670 Other Assets — 4,044 Total Assets of Discontinued Operations $ 2,111 $ 1,021,820 Liabilities: Accounts Payable $ 303 $ 20,786 Other Current Liabilities 361 30,728 Total Current Liabilities $ 664 $ 51,514 Long Term Debt — 5,001 Pneumoconiosis Benefits — 1,129 Mine Closing — 71,941 Reclamation — 34,126 Other liabilities — 792 Total Liabilities of Discontinued Operations $ 664 $ 164,503

Acquisitions and Dispositions

Acquisitions and Dispositions	9 Months Ended
	Sep. 30, 2016
ACQUISITIONS AND DISPOSITIONS: [Abstract]
Acquisitions and Dispositions:	ACQUISITIONS AND DISPOSITIONS: In September 2015, CONSOL Energy sold its 49% interest in Western Allegheny Energy (WAE), a joint venture with Rosebud Mining Company engaged in coal mining activities in Pennsylvania. At closing, CONSOL Energy received $76,297 in cash and a $2,136 reduction in certain liabilities. During the quarter, CONSOL Energy also received a cash distribution of $10,780 from WAE. The net gain on the sale was $48,468 and was included in the Gain on Sale of Assets in the Consolidated Statements of Income. In December 2014, CNX Gas Company LLC (CNX Gas Company), wholly-owned subsidiary of CONSOL Energy, finalized an agreement with Columbia Energy Ventures (CEVCO) to sublease from CEVCO approximately 20,000 acres of Utica Shale and Upper Devonian gas rights in Greene and Washington Counties in Pennsylvania and Marshall and Ohio Counties in West Virginia. Up-front bonus consideration of up to $ 96,106 was to be paid by CONSOL Energy over a five year period, as drilling occurs, in addition to royalties. CONSOL Energy made payments of $9,000 to CEVCO in the nine months ended September 30, 2016 while $50,970 of payments were made for the nine months ended September 30, 2015 . At September 30, 2016 , the amounts recorded in Other Current Liabilities and Other Long-Term Liabilities were $ 3,947 and $ 26,461 , respectively. At December 31, 2015, the amounts recorded in Other Current Liabilities and Other Long-Term Liabilities were $ 8,349 and $ 29,333 , respectively.

Other Income (Notes)

Other Income (Notes)	9 Months Ended
	Sep. 30, 2016
Component of Operating Income [Abstract]
Other Income and Other Expense Disclosure [Text Block]	Three Months Ended Nine Months Ended September 30, September 30, 2016 2015 2016 2015 Equity in Earnings of Affiliates - CONE $ 14,153 $ 12,733 $ 36,709 $ 29,770 Rental Income 8,983 9,439 27,258 28,437 Gathering Revenue 2,602 1,426 7,998 7,379 Royalty Income - Non-Operated Coal 2,011 4,847 6,664 12,989 Purchased Coal Sales 1,908 — 2,512 1,596 Equity in Earnings of Affiliates - Other 1,202 2,855 4,530 9,068 Interest Income 214 361 975 1,868 Right of Way Issuance 149 5,252 17,952 13,202 Coal Contract Buyout — — 6,288 — Other 1,171 1,562 3,273 6,970 Total Miscellaneous Other Income $ 32,393 $ 38,475 $ 114,159 $ 111,279

Pension and OPEB - Periodic Cos

Pension and OPEB - Periodic Cost	9 Months Ended
	Sep. 30, 2016
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 costs are as follows: Pension Benefits Other Post-Employment Benefits For the Three Months Ended September 30, For the Nine Months Ended September 30, For the Three Months Ended September 30, For the Nine Months Ended September 30, 2016 2015 2016 2015 2016 2015 2016 2015 Service Cost $ 482 $ 2,162 $ 1,445 $ 6,862 $ — $ — $ — $ — Interest Cost 5,895 8,042 19,578 25,202 6,060 6,677 18,181 20,561 Expected Return on Plan Assets (11,195 ) (12,903 ) (34,933 ) (38,282 ) — — — — Amortization of Prior Service Credits (148 ) (166 ) (443 ) (518 ) — (133,685 ) — (202,641 ) Recognized net Actuarial Loss 2,743 5,335 6,975 19,215 4,792 37,713 14,376 65,161 Settlement Loss 3,651 3,132 17,347 3,132 — — — — Curtailment Loss — 5 — 5 — — — — Net Periodic Benefit Cost (Credit) $ 1,428 $ 5,607 $ 9,969 $ 15,616 $ 10,852 $ (89,295 ) $ 32,557 $ (116,919 ) For the nine months ended September 30, 2016 and 2015 , $ 1,964 and $8,366 was paid to the pension trust from operating cash flows, respectively. Additional contributions to the pension trust are not expected to be material for the remainder of 2016 . According to the Defined Benefit Plans Topic of the Financial Accounting Standards Board (FASB) Accounting Standards Codification, if the lump sum distributions made during a plan year, which for CONSOL Energy is January 1 to December 31, exceed the total of the projected service cost and interest cost for the plan year, settlement accounting is required. Lump sum payments exceeded this threshold during the three and nine months ended September 30, 2016 . Accordingly, CONSOL Energy recognized settlement expense of $3,651 and $17,347 for the three and nine months ended September 30, 2016 , respectively, in Other Costs - Miscellaneous Operating Expense in the Consolidated Statements of Income. The settlement charges resulted in remeasurements of the pension plan at September 30, 2016 and June 30, 2016, which increased the pension liability by $7,486 and $6,203 , respectively. Lump sum payments also exceeded the settlement threshold during the three and nine months ended September 30, 2015 . Accordingly, settlement expense of $3,132 was recognized for the three and nine months ended September 30, 2015 in Other Costs - Miscellaneous Operating Expense in the Consolidated Statements of Income. Settlement accounting was triggered in July 2015, resulting in a remeasurement of the pension plan at July 31. This remeasurement reduced the pension liability by $1,328 . On August 31, 2015, the qualified pension plan was remeasured to reflect an announced plan amendment that reduced accruals of pension benefits as of January 1, 2016. The plan amendment called for a hard freeze of the qualified defined benefit pension plan on January 1, 2016 for all remaining participants in the plan. The modifications to the pension plan resulted in a $26,352 reduction in the pension liability. The amendment resulted in a remeasurement of the qualified pension plan at August 31, 2015. The remeasurement increased the pension liability by $17,793 . In the third quarter of 2015, CONSOL Energy remeasured its pension plan as a result of the previously discussed plan amendment. In conjunction with this remeasurement, the method used to estimate the service and interest components of net periodic benefit cost for pension was changed. This change was also made to other postretirement benefits during the fourth quarter during the annual remeasurement of that plan. This change compared to the previous method resulted in a decrease in the service and interest components for pension cost in the third quarter. Historically, CONSOL Energy estimated these service and interest cost components utilizing a single weighted-average discount rate derived from the yield curve used to measure the benefit obligation at the beginning of the period. CONSOL Energy has elected to utilize a full yield curve approach in the estimation of these components by applying the specific spot rates along the yield curve used in the determination of the benefit obligation to the relevant projected cash flows. This change was made to provide a more precise measurement of service and interest costs by improving the correlation between projected benefit cash flows to the corresponding spot yield curve rates. This change does not affect the measurement of the total benefit obligations or the annual net periodic benefit cost as the change in the service and interest costs is completely offset in the actuarial (gain) loss reported. CONSOL Energy has accounted for this change as a change in accounting estimate that is inseparable from a change in accounting principle and accordingly has accounted for it prospectively. On May 31, 2015, the Salaried OPEB and Production and Maintenance (P&M) OPEB plans were remeasured to reflect a plan amendment which eliminated Salaried and P&M OPEB benefits at December 31, 2015. The amendment to the OPEB plan resulted in a $43,598 reduction in the OPEB liability.The amendment resulted in a remeasurement of the OPEB plan at May 31, 2015 which decreased the liability by $1,070 . CONSOL Energy does not expect to contribute to the other post-employment benefit plan in 2016 . The Company intends to pay benefit claims as they become due. For the nine months ended September 30, 2016 and 2015 , $35,120 and $40,547 of other post-employment benefits have been paid

CWP and Workers Comp - Net Peri

CWP and Workers Comp - Net Periodic Costs	9 Months Ended
	Sep. 30, 2016
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 costs are as follows: CWP Workers' Compensation For the Three Months Ended September 30, For the Nine Months Ended September 30, For the Three Months Ended September 30, For the Nine Months Ended September 30, 2016 2015 2016 2015 2016 2015 2016 2015 Service Cost $ 1,041 $ 1,623 $ 3,285 $ 4,868 $ 1,904 $ 2,347 $ 5,713 $ 7,042 Interest Cost 1,053 1,279 3,230 3,837 638 799 1,913 2,396 Amortization of Actuarial Gain (1,188 ) (1,394 ) (3,759 ) (4,182 ) (101 ) (8 ) (303 ) (23 ) State Administrative Fees and Insurance Bond Premiums — — — — 792 888 2,491 2,764 Curtailment Gain — — (1,307 ) — — — — — Net Periodic Benefit Cost $ 906 $ 1,508 $ 1,449 $ 4,523 $ 3,233 $ 4,026 $ 9,814 $ 12,179 Expense (income) attributable to discontinued operations included in the CWP net periodic cost above was $74 for the three months ended September 30, 2015 , and $(1,290) and $223 for the nine months ended September 30, 2016 and 2015 , respectively. 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 . The curtailment resulted in a plan remeasurement increasing plan liabilities by $5,014 at March 31, 2016. CONSOL Energy does not expect to contribute to the CWP plan in 2016 . The Company intends to pay benefit claims as they become due. For the nine months ended September 30, 2016 and 2015 , $8,519 and $8,369 of CWP benefit claims have been paid, respectively. CONSOL Energy does not expect to contribute to the workers’ compensation plan in 2016 . The Company intends to pay benefit claims as they become due. For the nine months ended September 30, 2016 and 2015 , $11,547 and $12,540 of workers’ compensation benefits, state administrative fees and surety bond premiums have been paid

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2016
Income Tax Disclosure [Abstract]
Income Taxes	INCOME TAXES: The effective tax rate for the three and nine months ended September 30, 2016 was 46.7% and 24.7% , respectively. The effective tax rate is different from the U.S. federal statutory rate of 35% primarily due to charges to record state valuation allowances and the effects of the 2010-2013 Federal tax audit still in progress, partially offset by a larger anticipated book loss and the income tax benefit for excess percentage depletion. The effective tax rate for the three and nine months ended September 30, 2015 was 34.9% and 38.4% , respectively. The effective tax rate is different from the U.S. federal statutory rate of 35% primarily due to impairment charges recorded in June 2015. In addition, as the Company's loss for the nine months ended September 30, 2015 exceeded the anticipated ordinary loss for the full year, the tax benefit recognized for the nine months ended September 30, 2015 was limited to the amount that would be recognized if the year-to-date ordinary loss were the anticipated ordinary loss for the full year. Another item contributing to the benefit is the deduction for percentage depletion in excess of cost depletion related to the Company's coal operations. The total amount of uncertain tax positions at September 30, 2016 and December 31, 2015 were $15,536 and $12,702 , respectively. If these uncertain tax positions were recognized, approximately $2,834 would affect CONSOL Energy's effective tax rate at September 30, 2016 . There would be no effect on the Company's effective tax rate at December 31, 2015 . There was an increase of $2,834 to the liability for unrecognized tax benefits during the nine months ended September 30, 2016 . CONSOL Energy recognizes accrued interest related to uncertain tax positions in interest expense. As of September 30, 2016 and December 31, 2015 , the Company reported an accrued interest liability relating to uncertain tax positions of $242 and $53 , respectively, in Other Liabilities on the Consolidated Balance Sheets. The accrued interest liability includes $189 of accrued interest expense that is reflected in the Company's Consolidated Statements of Income for the nine months ended September 30, 2016 . CONSOL Energy recognizes penalties accrued related to uncertain tax positions in its income tax expense. As of September 30, 2016 and December 31, 2015 , 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 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 Internal Revenue Service to conclude its audit of tax years 2010 through 2013 in the fourth quarter of 2016.

Inventories

Inventories	9 Months Ended
	Sep. 30, 2016
Inventory Disclosure [Abstract]
Inventories	INVENTORIES: Inventory components consist of the following: September 30, December 31, Coal $ 8,367 $ 4,660 Supplies 54,255 62,132 Total Inventories $ 62,622 $ 66,792 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 natural gas and coal operations.

Accounts Receivable Securitizat

Accounts Receivable Securitization	9 Months Ended
	Sep. 30, 2016
ACCOUNTS RECEIVABLE SECURITIZATION: [Abstract]
Accounts Receivable Securitization	ACCOUNTS RECEIVABLE SECURITIZATION: CONSOL Energy and certain of its U.S. subsidiaries were party to a trade accounts receivable facility with financial institutions for the sale on a continuous basis of eligible trade accounts receivable. This facility was terminated on July 7, 2015. CNX Funding Corporation, a wholly owned, special purpose, bankruptcy-remote subsidiary, bought and sold eligible trade receivables generated by certain subsidiaries of CONSOL Energy. Under the receivables facility, CONSOL Energy and certain subsidiaries, irrevocably and without recourse, sold all of their eligible trade accounts receivable to CNX Funding Corporation, who in turn sold these receivables to financial institutions and their affiliates, while maintaining a subordinated interest in a portion of the pool of trade receivables. This retained interest, which was included in Accounts and Notes Receivable-Trade in the Consolidated Balance Sheets, was recorded at fair value. Due to a short average collection cycle for such receivables, CONSOL Energy's collection experience history and the composition of the designated pool of trade accounts receivable that were part of this program, the fair value of its retained interest approximated the total amount of the designated pool of accounts receivable. CONSOL Energy serviced the sold trade receivables for the financial institutions for a fee based upon market rates for similar services.

Property, Plant and Equipment

Property, Plant and Equipment	9 Months Ended
	Sep. 30, 2016
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment	PROPERTY, PLANT AND EQUIPMENT: September 30, December 31, E&P Property, Plant and Equipment Intangible drilling cost $ 3,515,485 $ 3,452,989 Proved gas properties 1,933,211 1,922,602 Unproved gas properties 1,429,905 1,421,083 Gas gathering equipment 1,133,840 1,147,173 Gas wells and related equipment 819,902 785,744 Other gas assets 127,984 125,691 Gas advance royalties 15,265 19,745 Total E&P Property, Plant and Equipment $ 8,975,592 $ 8,875,027 Less: Accumulated Depreciation, Depletion and Amortization 3,002,288 2,695,674 Total E&P Property, Plant and Equipment - Net $ 5,973,304 $ 6,179,353 PA Mining Operations Property, Plant and Equipment Coal and other plant and equipment $ 2,300,650 $ 2,284,175 Coal properties and surface lands 457,372 456,044 Airshafts 368,031 351,870 Mine development 326,153 326,153 Coal advance mining royalties 16,294 16,263 Leased coal lands 26,569 26,402 Total PA Mining Operations and Other Property, Plant and Equipment $ 3,495,069 $ 3,460,907 Less: Accumulated Depreciation, Depletion and Amortization 1,728,423 1,603,642 Total PA Mining Operations and Other Property, Plant and Equipment - Net $ 1,766,646 $ 1,857,265 Other Property, Plant and Equipment Coal and other plant and equipment 561,575 569,261 Coal properties and surface lands 481,371 313,493 Airshafts 10,002 10,002 Mine development 17,987 18,145 Coal advance mining royalties 314,537 312,452 Leased coal lands 64,582 235,620 Total Other Property, Plant and Equipment $ 1,450,054 $ 1,458,973 Less: Accumulated Depreciation, Depletion and Amortization 775,385 762,885 Total Other Property, Plant and Equipment - Net $ 674,669 $ 696,088 Total Company Property, Plant and Equipment $ 13,920,715 $ 13,794,907 Less - Total Company Accumulated Depreciation, Depletion and Amortization 5,506,096 5,062,201 Total Property, Plant and Equipment of Continuing Operations - Net $ 8,414,619 $ 8,732,706 Impairment of Proved Properties CONSOL Energy performs a quantitative annual impairment test, during the fourth quarter of each year, over proved properties using the published NYMEX forward prices, timing, methods and other assumptions consistent with historical periods. During interim periods, management updates these annual tests whenever events or changes in circumstances indicate that a property’s carrying amount may not be recoverable. Throughout the first six months of 2015, spot prices and forward curves for natural gas continued to decline from December 31, 2014 prices, which together with other macro-economic factors in the exploration and production industry were deemed indicators of impairment for all of the Company's proved natural gas properties. Impairment tests require that the Company first compare future undiscounted cash flows by asset group to their respective carrying values. If the carrying amount exceeds the estimated undiscounted future cash flows, a reduction of the carrying amount of the natural gas properties to their estimated fair values is required, which is determined based on discounted cash flow techniques using a market-specific weighted average cost of capital. During the quarter ended June 30, 2015, certain of the Company’s proved properties, primarily shallow oil and gas assets, failed the undiscounted cash flow portion of the test. After performing the discounted cash flow portion of the test, CONSOL Energy recorded an impairment of $ 824,742 in the Impairment of Exploration and Production Properties in the Consolidated Statement of Income. Valuation of the impaired assets is a Level 3 measurement as it incorporates significant unobservable inputs, such as future production levels and operating costs, within the discounted cash flow analysis. The impairment related to approximately 95% of the Company’s shallow oil and gas assets in West Virginia and Pennsylvania. No such impairments were recorded during the three or nine months ended September 30, 2016. Impairment of Unproved Properties CONSOL Energy evaluates capitalized costs of unproved gas properties for recoverability on a prospective basis. Indicators of potential impairment include potential shifts in business strategy, overall economic factors and historical experience. For the quarter ended June 30, 2015, unproved property impairments relating to the determination that the properties will not yield proved reserves were $ 4,163 and are included in the Impairment of Exploration and Production Properties in the Consolidated Statement of Income. Valuation of the impaired assets is a Level 3 measurement as it incorporates significant unobservable inputs, such as future production levels and operating costs, within the discounted cash flow analysis. This impairment primarily related to the court ruling in June 2015 in the state of New York that officially bans hydraulic fracturing. No such impairments were recorded during the three or nine months ended September 30, 2016. Industry Participation Agreements CONSOL Energy has 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 is 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 September 30, 2016 , Hess’ remaining carry obligation is $ 6,193 . CNX Gas Company is party to a joint development agreement with Noble Energy, Inc. (Noble) with respect to approximately 700 thousand net Marcellus Shale natural gas and oil acres in West Virginia and Pennsylvania, in which each party owns a 50% undivided interest. Under the agreement, as amended, Noble Energy is obligated to pay a total of approximately $1,846,000 in the form of a one-third drilling carry of certain of CONSOL Energy’s working interest obligations as the property is developed, subject to certain limitations. These limitations include the suspension of the carry if average Henry Hub natural gas prices are below $4.00 per million British thermal units (MMbtu) for three consecutive months. The carry was in effect from March 1, 2014, until November 1, 2014 at which time natural gas prices had fallen below $4.00/MMbtu for three consecutive months. The carry remains suspended. Limitations also include a $400,000 annual maximum on Noble Energy's carried cost obligation. As of September 30, 2016 , Noble Energy’s remaining carry obligation is $1,624,448 .

Short-Term Notes Payable

Short-Term Notes Payable	9 Months Ended
	Sep. 30, 2016
Short-term Debt, Other Disclosures [Abstract]
Short-Term Notes Payable:	SHORT-TERM NOTES PAYABLE: CONSOL Energy's current 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 request an additional $ 500,000 increase in the aggregate borrowing limit amount. The current 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 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 September 30, 2016 , the interest coverage ratio was 3.99 to 1.00 and the current ratio was 2.73 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 September 30, 2016 , the $2,000,000 facility had $ 354,000 of borrowings outstanding and $ 323,761 of letters of credit outstanding, leaving $ 1,322,239 of unused capacity. At December 31, 2015 , the $2,000,000 facility had $952,000 of borrowings outstanding and $ 258,177 of letters of credit outstanding, leaving $ 789,823 of unused capacity.

Long-Term Debt

Long-Term Debt	9 Months Ended
	Sep. 30, 2016
Long-term Debt, Other Disclosures [Abstract]
Long-term Debt	LONG-TERM DEBT: September 30, December 31, Debt: Senior Notes due April 2022 at 5.875% (Principal of $1,850,000 plus Unamortized Premium of $4,953 and $5,617, respectively) $ 1,854,953 $ 1,855,617 Senior Notes due April 2023 at 8.00% (Principal of $500,000 less Unamortized Discount of $5,882 and $6,561, respectively) 494,118 493,439 Revolving Credit Facility - CNX Coal Resources LP 208,000 185,000 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 (16.35% Weighted Average Interest Rate) 3,482 3,964 Other Long-Term Note Maturing in 2018 (Principal of $2,146 and $3,096 less Unamortized Discount of $162 and $327, respectively) 1,984 2,769 Less: Unamortized Debt Issuance Costs 29,028 33,017 2,731,455 2,705,718 Net Amounts Due in One Year and Current Unamortized Debt Issuance Costs* (2,549 ) (2,602 ) Long-Term Debt $ 2,734,004 $ 2,708,320 * Represents $1,873 and $1,820 due in one year, less $4,422 of unamortized debt issuance costs at September 30, 2016 and December 31, 2015 , respectively. Excludes current portion of Capital Lease Obligations of $7,019 and $ 7,590 at September 30, 2016 and December 31, 2015 , respectively.

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2016
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 $642,852 . 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 forced-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, and on June 23, 2015 CNX Gas Company filed its Opposition to same. The Court held a hearing on the Motion on September 18, 2015 and has not yet ruled. 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. Court of Appeals for the Fourth Circuit. 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, and on June 23, 2015 CNX Gas Company filed its Opposition to same. The Court held a hearing on the Motion on September 18, 2015 and has not yet ruled. 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. Clean Water Act - Bailey Mine: The Company received from the U.S. EPA on April 8, 2011, a request for information relating to National Pollutant Discharge Elimination System (NPDES) Permit compliance at the Company’s Bailey and Enlow Fork Mines. In response, CONSOL Pennsylvania Coal Company submitted water discharge monitoring and other data to the EPA. In early 2013, the case was referred to the U.S. Department of Justice (DOJ), and the Pennsylvania Department of Environmental Protection (PA DEP) also became involved. On December 18, 2014, the DOJ provided the Company a proposed Consent Decree to resolve certain Clean Water Act and Clean Streams Law claims against CONSOL Energy, Inc. and CONSOL Pennsylvania Coal Company with respect to the Bailey Mine Complex. After negotiations, the parties reached an agreement in principle on the terms of a Consent Decree naming CONSOL Energy Inc., Consol Pennsylvania Coal Company LLC and CNX Coal Resources LP as defendants. On August 4, 2016, EPA and PA DEP filed a Complaint and Notice of Lodging of the proposed Consent Decree in the U.S. District Court for the Western District of Pennsylvania. No comments were received on the Consent Decree before the public comment period closed. On September 14, 2016, the Court signed the Consent Decree and entered final judgment in this matter. The Consent Decree imposed on defendants a civil penalty of $3,000 and various compliance requirements. The Company has established an accrual to cover its liability in this matter. 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 and land rights lawsuits and claims include those for which a loss is reasonably possible, but not probable, and accordingly, an accrual may not have 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. 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 were filed 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 have appealed both cases to the U.S. Court of Appeals for the Fourth Circuit, where oral argument is scheduled for December 8, 2016. The third case remains pending in the trial court. 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. The Complaints seek damages and injunctive relief in connection with the transfer of water from mining activities at Buchanan Mine into void spaces in inactive ICCC mines adjacent to the Buchanan operations, voids ostensibly underlying plaintiffs’ properties. While some of the plaintiffs have an ownership interest in the coal, others have some interest in one or more of the fee, surface, oil/gas or other mineral estates. The suits allege the water storage precludes access to and has damaged coal, impeded coalbed methane gas production and was made without compensation to the property owners. Plaintiffs seek recovery in tort, contract and trespass assumpsit (quasi-contract). The suits each seek damages between $50,000 and in excess of $100,000 plus punitive damages. The Company intends to vigorously defend these suits. At September 30, 2016 , 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 $ 82,273 $ 54,574 $ 27,699 $ — $ — Environmental 998 998 — — — Other 240,490 37,477 203,013 — — Total Letters of Credit 323,761 93,049 230,712 — — Surety Bonds: Employee-Related 112,810 111,760 1,050 — — Environmental 528,430 523,868 4,562 — — Other 22,522 21,371 1,149 2 — Total Surety Bonds 663,762 656,999 6,761 2 — Guarantees: Coal 8,350 8,350 — — — Other 77,622 41,693 18,386 13,860 3,683 Total Guarantees 85,972 50,043 18,386 13,860 3,683 Total Commitments $ 1,073,495 $ 800,091 $ 255,859 $ 13,862 $ 3,683 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 September 30, 2016 , and December 31, 2015, the fair value of these guarantees was $1,463 and $1,228 , respectively, and are 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. 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 September 30, 2016 , the purchase obligations for each of the next five years and beyond were as follows: Obligations Due Amount Less than 1 year $ 199,528 1 - 3 years 270,334 3 - 5 years 223,058 More than 5 years 587,331 Total Purchase Obligations $ 1,280,251

Derivative Instruments

Derivative Instruments	9 Months Ended
	Sep. 30, 2016
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. CONSOL Energy de-designated all of its cash flow hedges on December 31, 2014 and accounts for all existing and future gas and NGL commodity hedges on a mark-to-market basis with changes in fair value recorded in current period earnings. In connection with this de-designation, CONSOL Energy froze the balances recorded in Accumulated Other Comprehensive Income at December 31, 2014 and reclassifies balances to earnings as the underlying physical transactions occur, unless it is no longer probable that the physical transaction will occur at which time the related gains deferred in Other Comprehensive Income (OCI) will be immediately recorded in 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. CONSOL Energy’s natural gas derivative instruments accounted for a total notional amount of production of 597.1 Bcf at September 30, 2016 and are forecasted to settle through 2020 . At December 31, 2015 , the natural gas derivative instruments accounted for a total notional amount of production of 456.1 Bcf. At September 30, 2016 , the basis only swaps were for notional amounts of 360.6 Bcf and are forecasted to settle through 2020 . At December 31, 2015 , the basis only swaps were for notional amounts of 124.4 Bcf. CONSOL Energy's NGL derivative instruments accounted for a total notional amount of production of 254.8 Mbbls of propane at September 30, 2016 and are forecasted to settle through 2017 . No NGL derivative instruments were outstanding at December 31, 2015 . The gross fair value of CONSOL Energy's derivative instruments at September 30, 2016 and December 31, 2015 were as follows: Asset Derivative Instruments Liability Derivative Instruments September 30, December 31, September 30, December 31, 2016 2015 2016 2015 Commodity Swaps: Prepaid Expense $ 36,686 $ 234,409 Other Accrued Liabilities $ 51,829 $ — Other Assets 39,124 44,539 Other Liabilities 40,636 5,137 Total Asset $ 75,810 $ 278,948 Total Liability $ 92,465 $ 5,137 Basis Only Swaps: Prepaid Expense $ 55,209 $ 5,429 Other Accrued Liabilities $ 6,909 $ 12,206 Other Assets 36,998 1,093 Other Liabilities 4,275 1,569 Total Asset $ 92,207 $ 6,522 Total Liability $ 11,184 $ 13,775 The effect of derivative instruments on CONSOL Energy's Consolidated Statements of Income was as follows: For the Three Months Ended For the Nine Months Ended September 30, September 30, 2016 2015 2016 2015 Cash Received (Paid) in Settlement of Commodity Derivative Instruments: Commodity Swaps: Natural Gas $ 28,175 $ 43,169 $ 201,624 $ 115,525 Propane 22 — (92 ) — Natural Gas Basis Swaps 10,440 1,300 1,771 1,343 Total Cash Received in Settlement of Commodity Derivative Instruments 38,637 44,469 203,303 116,868 Unrealized Gain (Loss) on Commodity Derivative Instruments: Commodity Swaps: Natural Gas 54,676 70,362 (289,722 ) 41,189 Propane 48 — (744 ) — Natural Gas Basis Swaps 85,234 (3,634 ) 88,276 (2,827 ) Reclassified from Accumulated OCI 19,597 32,409 52,759 95,843 Total Unrealized Gain (Loss) on Commodity Derivative Instruments 159,555 99,137 (149,431 ) 134,205 Gain (Loss) on Commodity Derivative Instruments: Commodity Swaps: Natural Gas 82,851 113,531 (88,098 ) 156,714 Propane 70 — (836 ) — Natural Gas Basis Swaps 95,674 (2,334 ) 90,047 (1,484 ) Reclassified from Accumulated OCI 19,597 32,409 52,759 95,843 Total Gain on Commodity Derivative Instruments $ 198,192 $ 143,606 $ 53,872 $ 251,073 Changes in Accumulated OCI, net of tax, attributable to cash flow hedges that were de-designated December 31, 2014 were as follows: For the Three Months Ended For the Nine Months Ended September 30, September 30, 2016 2015 2016 2015 Beginning Balance – Accumulated OCI $ 22,453 $ 81,403 $ 43,470 $ 121,521 Less: Gain Reclassified from Accumulated OCI (Net of tax: $7,139, $11,807, $19,284, $35,123) (12,458 ) (20,602 ) (33,475 ) (60,720 ) Ending Balance – Accumulated OCI $ 9,995 $ 60,801 $ 9,995 $ 60,801 CONSOL Energy expects to reclassify an additional $9,995 , net of tax of $5,727 , out of Accumulated Other Comprehensive Income prior to December 31, 2016.

Fair Value of Financial Instrum

Fair Value of Financial Instruments	9 Months Ended
	Sep. 30, 2016
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 September 30, 2016 Fair Value Measurements at December 31, 2015 Description (Level 1) (Level 2) (Level 3) (Level 1) (Level 2) (Level 3) Gas Derivatives $ — $ 64,368 $ — $ — $ 266,558 $ — Murray Energy Guarantees $ — $ — $ (1,463 ) $ — $ — $ (1,228 ) 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. Short-term notes payable : The carrying amount reported in the Consolidated Balance Sheets for short-term notes payable 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: September 30, 2016 December 31, 2015 Carrying Amount Fair Value Carrying Amount Fair Value Cash and Cash Equivalents $ 80,247 $ 80,247 $ 72,574 $ 72,574 Short-Term Notes Payable $ 354,000 $ 354,000 $ 952,000 $ 952,000 Long-Term Debt $ 2,760,483 $ 2,563,492 $ 2,738,735 $ 1,808,936

Segment Information

Segment Information	9 Months Ended
	Sep. 30, 2016
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, Utica, 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, selling, general and administrative activities, as well as various other activities assigned to the E&P division but not allocated to each individual strata. 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 Fola and Miller Creek 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 Fola and Miller Creek 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. 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	9 Months Ended
	Sep. 30, 2016
NOTE 16- RELATED PARTY TRANSACTIONS [Abstract]
Related Party Transactions Disclosure [Text Block]	RELATED PARTY TRANSACTIONS: CONE Gathering LLC (CONE) and CONE Midstream Partners LP (the Partnership) During the nine months ended September 30, 2016 , additional capital contributions of $ 2,571 were made to CONE and additional capital contributions of $ 2,051 were made to the Partnership. The capital contributions were offset by $1,640 of distributions from CONE, and $ 20,628 of distributions from the Partnership. During the nine months ended September 30, 2015 , additional capital contributions of $ 8,541 were made to CONE, and additional capital contributions of $58,212 were made to the Partnership, offset in part, by $12,364 of distributions from the Partnership. Following the Partnership IPO in September 2014, CONE has a 2% general partner interest in the Partnership, while each sponsor has 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. At September 30, 2016 , 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. Equity in earnings of affiliates during the three months ended September 30, 2016 and 2015 related to CONE was $6,567 and $6,423 , respectively. Equity in earnings of affiliates during the three months ended September 30, 2016 and 2015 related to the Partnership was $7,586 and $6,310 , respectively. For the nine months ended September 30, 2016 and 2015 , equity in earnings of affiliates related to CONE was $13,713 and $14,099 , respectively. For the nine months ended September 30, 2016 and 2015 , equity in earnings affiliates related to the Partnership was $22,996 and $15,671 , respectively. During the nine months ended September 30, 2016 and 2015 , CONE and the Partnership provided gathering services to CNX Gas Company in the ordinary course of business. Gathering services provided were $31,216 and $27,890 for the three months ended September 30, 2016 and 2015 , respectively. For the nine months ended September 30, 2016 and 2015 , gathering services were $93,209 and $75,176 , respectively. These costs were included in Transportation, Gathering and Compression Costs on CONSOL Energy’s accompanying Consolidated Statements of Income. At September 30, 2016 and December 31, 2015 , CONSOL Energy had a net payable of $8,543 and $12,216 respectively, due to both the Partnership and CONE primarily for accrued but unpaid gathering services. Additionally, during the nine months ended September 30, 2015 , CONSOL Energy purchased $2,239 of supply inventory from the Partnership. CNX Coal Resources LP (CNXC) On July 7, 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 IPO offering, 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 . On September 30, 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, on September 30, 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 For the Nine Months Ended September 30, September 30, 2016 2015 2016 2015 Operating and Other Costs $ 854 $ 2,736 $ 3,390 $ 5,177 Selling, General and Administrative Expenses 856 2,598 3,090 6,904 Total Services from CONSOL Energy $ 1,710 $ 5,334 $ 6,480 $ 12,081 At September 30, 2016 and December 31, 2015, CNXC had a net payable to CONSOL Energy in the amount of $1,320 and $4,310 , respectively. This payable includes reimbursements for business expenses, executive fees, stock-based compensation and other items under the omnibus agreement.

Stock Repurchase (Notes)

Stock Repurchase (Notes)	9 Months Ended
	Sep. 30, 2016
Stock Repurchase [Abstract]
Treasury Stock [Text Block]	In December 2014, CONSOL Energy's Board of Directors approved a stock repurchase program under which CONSOL Energy may purchase from time to time up to $250,000 of its common stock over the next two years. Under the terms of the program, CONSOL Energy may make repurchases in the open market, in privately negotiated transactions, accelerated repurchase programs or in structured share repurchase programs. Any repurchases of common stock will be funded from available cash on hand or short-term borrowings. The program does not obligate CONSOL Energy to acquire any particular amount of common stock, and it may be modified or suspended at any time at the Company's discretion. The program will be conducted in compliance with applicable legal requirements and within the limits imposed by any credit agreement, receivables purchase agreement or indenture and shall be subject to market conditions and other factors. During the three and nine months ended September 30, 2016 , and during the three months ended September 30, 2015 , no shares were repurchased. During the nine months ended September 30, 2015 , 2,213,100 shares were repurchased and retired at an average price of $ 32.37 per share.

Recent Accounting Pronouncement

Recent Accounting Pronouncements (Notes)	9 Months Ended
	Sep. 30, 2016
Accounting Changes and Error Corrections [Abstract]
New Accounting Pronouncements, Policy [Policy Text Block]	RECENT ACCOUNTING PRONOUNCEMENTS: 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 June 2016, the FASB issued Update 2016-13 - Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments, which provides financial statement users with more decision-useful information about the expected credit losses on financial instruments and other commitments to extend credit held by a reporting entity at each reporting date. To achieve this, the amendments in this Update replace the incurred loss impairment methodology in current Generally Accepted Accounting Principals (GAAP) with a methodology that reflects expected credit losses and requires consideration of a broader range of reasonable and supportable information to inform credit loss estimates. The measurement of expected credit losses will be based on relevant information about past events, including historical experience, current conditions, and reasonable and supportable forecasts that affect the collectibility of the reported amount. The amendments in this Update will be applied using a modified-retrospective approach and, for public entities, are effective for fiscal years beginning after December 15, 2019 and interim periods within those annual periods. Early adoption is permitted for fiscal years beginning after December 15, 2018 and interim periods within those annual periods. The Company believes this guidance will not have a material impact 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. After considering the FASB's issuance of a standard that delayed application of Topic 606 by one year, 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. The Company is currently evaluating the method of adoption as it relates to Update 2014-09 and the impacts that these standards will have on CONSOL Energy's financial statements. In March 2016, the FASB issued Update 2016-09 - Compensation-Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting, which simplifies several aspects of the accounting for share-based payment transactions, including the income tax consequences, classification of awards as either equity or liabilities, and classification on the statement of cash flows. Specifically, this Update states that: all excess tax benefits and tax deficiencies should be recognized as income tax expense or benefit in the income statement; excess tax benefits should be classified along with other income tax cash flows as an operating activity; an entity can make an accounting policy election to either estimate the number of awards that are expected to vest or account for forfeitures when they occur; the threshold to qualify for equity classification permits withholding up to the maximum statutory tax rates in the applicable jurisdictions; and cash paid by an employer when directly withholding shares for tax-withholding purposes should be classified as a financing activity. For public entities, the amendments in this Update are effective for fiscal years beginning after December 15, 2016 and interim periods within those annual periods. Early adoption is permitted. The Company is currently evaluating the impact this guidance may have on CONSOL Energy's financial statements. 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)	9 Months Ended
	Sep. 30, 2016
Subsequent Event [Line Items]
Subsequent Events [Text Block]	SUBSEQUENT EVENTS: On October 29, 2016, CNX Gas entered into an Exchange Agreement with Noble Energy, which would effectively terminate the joint development of the gas assets held in connection with our joint venture with Noble Energy and divide such gas assets among CNX Gas and Noble Energy. Noble Energy, Inc. will also remit a cash payment of approximately $205,000 to CONSOL Energy at closing (subject to certain adjustments provided for in the Exchange Agreement). .

Basis of Presentation (Tables)

Basis of Presentation (Tables)	9 Months Ended
	Sep. 30, 2016
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 September 30, For the Nine Months Ended September 30, 2016 2015 2016 2015 Income (Loss) from Continuing Operations $ 62,568 $ 129,312 $ (214,770 ) $ (395,609 ) Loss from Discontinued Operations (34,975 ) (3,842 ) (322,747 ) (3,192 ) Net Income (Loss) $ 27,593 $ 125,470 $ (537,517 ) $ (398,801 ) Net Income Attributable to Noncontrolling Interest 2,248 6,490 4,541 6,490 Net Income (Loss) Attributable to CONSOL Energy Shareholders $ 25,345 $ 118,980 $ (542,058 ) $ (405,291 ) Weighted Average Shares of Common Stock Outstanding: Basic 229,438,612 229,036,172 229,369,309 229,230,571 Effect of Stock-Based Compensation Awards 2,079,973 315,955 — — Dilutive 231,518,585 229,352,127 229,369,309 229,230,571 Income (Loss) per Share: Basic (Continuing Operations) $ 0.26 $ 0.54 $ (0.96 ) $ (1.75 ) Basic (Discontinued Operations) (0.15 ) (0.02 ) (1.40 ) (0.02 ) Total Basic $ 0.11 $ 0.52 $ (2.36 ) $ (1.77 ) Dilutive (Continuing Operations) $ 0.26 $ 0.54 $ (0.96 ) $ (1.75 ) Dilutive (Discontinued Operations) (0.15 ) (0.02 ) (1.40 ) (0.02 ) Total Dilutive $ 0.11 $ 0.52 $ (2.36 ) $ (1.77 )
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 September 30, For the Nine Months Ended September 30, 2016 2015 2016 2015 Anti-Dilutive Options 2,989,610 3,650,864 6,230,099 3,650,864 Anti-Dilutive Restricted Stock Units 3,455 785,585 645,302 1,394,115 Anti-Dilutive Performance Share Units 1,659,014 — 2,326,120 — Anti-Dilutive Performance Stock Options 802,804 802,804 802,804 802,804 5,454,883 5,239,253 10,004,325 5,847,783
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: Gains on Cash Flow Hedges Postretirement Benefits Total Balance at December 31, 2015 $ 43,470 $ (359,068 ) $ (315,598 ) Other Comprehensive Loss before Reclassifications — (13,912 ) (13,912 ) Amounts reclassified from Accumulated Other Comprehensive Loss (33,475 ) 20,778 (12,697 ) Current period Other Comprehensive (Loss) Income (33,475 ) 6,866 (26,609 ) Balance at September 30, 2016 $ 9,995 $ (352,202 ) $ (342,207 )
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 September 30, For the Nine Months Ended September 30, 2016 2015 2016 2015 Derivative Instruments (Note 14) Natural Gas Price Swaps and Options $ (19,597 ) $ (32,409 ) $ (52,759 ) $ (95,843 ) Tax Expense 7,139 11,807 19,284 35,123 Net of Tax $ (12,458 ) $ (20,602 ) $ (33,475 ) $ (60,720 ) Actuarially Determined Long-Term Liability Adjustments* (Note 5 and Note 6) Amortization of Prior Service Costs $ (148 ) $ (133,851 ) $ (443 ) $ (203,159 ) Recognized Net Actuarial Loss 6,332 41,755 17,549 80,497 Curtailment Loss — 5 — 5 Settlement Loss 3,651 3,132 17,347 3,132 Total 9,835 (88,959 ) 34,453 (119,525 ) Tax (Benefit) Expense (3,664 ) 33,436 (12,861 ) 44,923 Net of Tax $ 6,171 $ (55,523 ) $ 21,592 $ (74,602 )
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 September 30, For the Nine Months Ended September 30, 2016 2015 2016 2015 Options — — — 363,620 Restricted Stock Units 5,920 90,055 574,310 576,562 Performance Share Units — — — 497,134 5,920 90,055 574,310 1,437,316

Pension and OPEB - Periodic C31

Pension and OPEB - Periodic Cost (Tables)	9 Months Ended
	Sep. 30, 2016
PENSION AND OTHER POSTRETIREMENT BENEFIT PLANS NET PERIODIC BENEFIT COSTS: [Abstract]
Components of Net Periodic Costs	Components of net periodic benefit costs are as follows: Pension Benefits Other Post-Employment Benefits For the Three Months Ended September 30, For the Nine Months Ended September 30, For the Three Months Ended September 30, For the Nine Months Ended September 30, 2016 2015 2016 2015 2016 2015 2016 2015 Service Cost $ 482 $ 2,162 $ 1,445 $ 6,862 $ — $ — $ — $ — Interest Cost 5,895 8,042 19,578 25,202 6,060 6,677 18,181 20,561 Expected Return on Plan Assets (11,195 ) (12,903 ) (34,933 ) (38,282 ) — — — — Amortization of Prior Service Credits (148 ) (166 ) (443 ) (518 ) — (133,685 ) — (202,641 ) Recognized net Actuarial Loss 2,743 5,335 6,975 19,215 4,792 37,713 14,376 65,161 Settlement Loss 3,651 3,132 17,347 3,132 — — — — Curtailment Loss — 5 — 5 — — — — Net Periodic Benefit Cost (Credit) $ 1,428 $ 5,607 $ 9,969 $ 15,616 $ 10,852 $ (89,295 ) $ 32,557 $ (116,919 )

CWP and Workers Comp - Net Pe32

CWP and Workers Comp - Net Periodic Costs (Tables)	9 Months Ended
	Sep. 30, 2016
CWP And Workers Comp Net Periodic Cost [Abstract]
Schedule Of Postemployment Benefits Disclosure [Text Block]	Components of net periodic benefit costs are as follows: CWP Workers' Compensation For the Three Months Ended September 30, For the Nine Months Ended September 30, For the Three Months Ended September 30, For the Nine Months Ended September 30, 2016 2015 2016 2015 2016 2015 2016 2015 Service Cost $ 1,041 $ 1,623 $ 3,285 $ 4,868 $ 1,904 $ 2,347 $ 5,713 $ 7,042 Interest Cost 1,053 1,279 3,230 3,837 638 799 1,913 2,396 Amortization of Actuarial Gain (1,188 ) (1,394 ) (3,759 ) (4,182 ) (101 ) (8 ) (303 ) (23 ) State Administrative Fees and Insurance Bond Premiums — — — — 792 888 2,491 2,764 Curtailment Gain — — (1,307 ) — — — — — Net Periodic Benefit Cost $ 906 $ 1,508 $ 1,449 $ 4,523 $ 3,233 $ 4,026 $ 9,814 $ 12,179

Inventories (Tables)

Inventories (Tables)	9 Months Ended
	Sep. 30, 2016
Inventory Disclosure [Abstract]
Inventory components	September 30, December 31, Coal $ 8,367 $ 4,660 Supplies 54,255 62,132 Total Inventories $ 62,622 $ 66,792

Property, Plant and Equipment (

Property, Plant and Equipment (Tables)	9 Months Ended
	Sep. 30, 2016
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment	September 30, December 31, E&P Property, Plant and Equipment Intangible drilling cost $ 3,515,485 $ 3,452,989 Proved gas properties 1,933,211 1,922,602 Unproved gas properties 1,429,905 1,421,083 Gas gathering equipment 1,133,840 1,147,173 Gas wells and related equipment 819,902 785,744 Other gas assets 127,984 125,691 Gas advance royalties 15,265 19,745 Total E&P Property, Plant and Equipment $ 8,975,592 $ 8,875,027 Less: Accumulated Depreciation, Depletion and Amortization 3,002,288 2,695,674 Total E&P Property, Plant and Equipment - Net $ 5,973,304 $ 6,179,353 PA Mining Operations Property, Plant and Equipment Coal and other plant and equipment $ 2,300,650 $ 2,284,175 Coal properties and surface lands 457,372 456,044 Airshafts 368,031 351,870 Mine development 326,153 326,153 Coal advance mining royalties 16,294 16,263 Leased coal lands 26,569 26,402 Total PA Mining Operations and Other Property, Plant and Equipment $ 3,495,069 $ 3,460,907 Less: Accumulated Depreciation, Depletion and Amortization 1,728,423 1,603,642 Total PA Mining Operations and Other Property, Plant and Equipment - Net $ 1,766,646 $ 1,857,265 Other Property, Plant and Equipment Coal and other plant and equipment 561,575 569,261 Coal properties and surface lands 481,371 313,493 Airshafts 10,002 10,002 Mine development 17,987 18,145 Coal advance mining royalties 314,537 312,452 Leased coal lands 64,582 235,620 Total Other Property, Plant and Equipment $ 1,450,054 $ 1,458,973 Less: Accumulated Depreciation, Depletion and Amortization 775,385 762,885 Total Other Property, Plant and Equipment - Net $ 674,669 $ 696,088 Total Company Property, Plant and Equipment $ 13,920,715 $ 13,794,907 Less - Total Company Accumulated Depreciation, Depletion and Amortization 5,506,096 5,062,201 Total Property, Plant and Equipment of Continuing Operations - Net $ 8,414,619 $ 8,732,706

Long-Term Debt (Tables)

Long-Term Debt (Tables)	9 Months Ended
	Sep. 30, 2016
Long-term Debt, Other Disclosures [Abstract]
Schedule of Long-term Debt	September 30, December 31, Debt: Senior Notes due April 2022 at 5.875% (Principal of $1,850,000 plus Unamortized Premium of $4,953 and $5,617, respectively) $ 1,854,953 $ 1,855,617 Senior Notes due April 2023 at 8.00% (Principal of $500,000 less Unamortized Discount of $5,882 and $6,561, respectively) 494,118 493,439 Revolving Credit Facility - CNX Coal Resources LP 208,000 185,000 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 (16.35% Weighted Average Interest Rate) 3,482 3,964 Other Long-Term Note Maturing in 2018 (Principal of $2,146 and $3,096 less Unamortized Discount of $162 and $327, respectively) 1,984 2,769 Less: Unamortized Debt Issuance Costs 29,028 33,017 2,731,455 2,705,718 Net Amounts Due in One Year and Current Unamortized Debt Issuance Costs* (2,549 ) (2,602 ) Long-Term Debt $ 2,734,004 $ 2,708,320

Commitments and Contingencies (

Commitments and Contingencies (Tables)	9 Months Ended
	Sep. 30, 2016
Long-term Purchase Commitment [Table Text Block]	At September 30, 2016 , 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 $ 82,273 $ 54,574 $ 27,699 $ — $ — Environmental 998 998 — — — Other 240,490 37,477 203,013 — — Total Letters of Credit 323,761 93,049 230,712 — — Surety Bonds: Employee-Related 112,810 111,760 1,050 — — Environmental 528,430 523,868 4,562 — — Other 22,522 21,371 1,149 2 — Total Surety Bonds 663,762 656,999 6,761 2 — Guarantees: Coal 8,350 8,350 — — — Other 77,622 41,693 18,386 13,860 3,683 Total Guarantees 85,972 50,043 18,386 13,860 3,683 Total Commitments $ 1,073,495 $ 800,091 $ 255,859 $ 13,862 $ 3,683
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 September 30, 2016 , the purchase obligations for each of the next five years and beyond were as follows: Obligations Due Amount Less than 1 year $ 199,528 1 - 3 years 270,334 3 - 5 years 223,058 More than 5 years 587,331 Total Purchase Obligations $ 1,280,251

Derivative Instruments (Tables)

Derivative Instruments (Tables)	9 Months Ended
	Sep. 30, 2016
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Derivative Instruments	were as follows: For the Three Months Ended For the Nine Months Ended September 30, September 30, 2016 2015 2016 2015 Beginning Balance – Accumulated OCI $ 22,453 $ 81,403 $ 43,470 $ 121,521 Less: Gain Reclassified from Accumulated OCI (Net of tax: $7,139, $11,807, $19,284, $35,123) (12,458 ) (20,602 ) (33,475 ) (60,720 ) Ending Balance – Accumulated OCI $ 9,995 $ 60,801 $ 9,995 $ 60,801 CONSOL Energy expects to reclassify an additional $9,995 , net of tax of $5,727 , out of Accumulated Other Comprehensive Income prior to December 31, 2016.

Fair Value of Financial Instr38

Fair Value of Financial Instruments (Tables)	9 Months Ended
	Sep. 30, 2016
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 September 30, 2016 Fair Value Measurements at December 31, 2015 Description (Level 1) (Level 2) (Level 3) (Level 1) (Level 2) (Level 3) Gas Derivatives $ — $ 64,368 $ — $ — $ 266,558 $ — Murray Energy Guarantees $ — $ — $ (1,463 ) $ — $ — $ (1,228 )
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Table Text Block]	September 30, 2016 December 31, 2015 Carrying Amount Fair Value Carrying Amount Fair Value Cash and Cash Equivalents $ 80,247 $ 80,247 $ 72,574 $ 72,574 Short-Term Notes Payable $ 354,000 $ 354,000 $ 952,000 $ 952,000 Long-Term Debt $ 2,760,483 $ 2,563,492 $ 2,738,735 $ 1,808,936

Segment Information (Tables)

Segment Information (Tables)	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
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 $ 107,676 $ 40,312 $ 46,917 $ 11,008 $ 205,913 $ 267,685 $ — $ — $ 473,598 Gain on Commodity Derivative Instruments 23,548 4,646 8,197 161,801 198,192 — — — 198,192 Other Outside Sales — — — — — — 4,714 — 4,714 Sales—Purchased Gas — — — 12,086 12,086 — — — 12,086 Freight—Outside — — — — — 9,392 — — 9,392 Total Sales and Freight $ 131,224 $ 44,958 $ 55,114 $ 184,895 $ 416,191 $ 277,077 $ 4,714 $ — $ 697,982 Earnings (Loss) Before Income Taxes $ 10,465 $ 4,342 $ 6,989 $ 139,279 $ 161,075 $ 34,741 $ (80,390 ) $ — $ 115,426 (A) Segment Assets $ 6,537,210 $ 2,007,767 $ 1,018,406 $ 2,111 $ 9,565,494 (B) Depreciation, Depletion and Amortization $ 101,257 $ 42,370 $ 8,085 $ — $ 151,712 Capital Expenditures $ 48,746 $ 12,292 $ 3,094 $ — $ 64,132 (A) Includes equity in earnings of unconsolidated affiliates of $15,219 and $136 for E&P and Other, respectively. (B) Includes investments in unconsolidated equity affiliates of $253,637 and $3,786 for 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 $ 75,003 $ 20,617 $ 48,860 $ 13,058 $ 157,538 $ 323,171 $ — $ — $ 480,709 (C) Gain on Commodity Derivative Instruments 24,039 955 14,285 104,327 143,606 — — — 143,606 Other Outside Sales — — — — — — 5,129 — 5,129 Sales—Purchased Gas — — — 2,535 2,535 — — — 2,535 Freight—Outside — — — — — 2,436 — — 2,436 Intersegment Transfers — — 298 — 298 — — (298 ) — Total Sales and Freight $ 99,042 $ 21,572 $ 63,443 $ 119,920 $ 303,977 $ 325,607 $ 5,129 $ (298 ) $ 634,415 (Loss) Earnings Before Income Taxes $ (13,975 ) $ (10,505 ) $ 11,541 $ 63,126 $ 50,187 $ 132,327 $ 12,964 $ (298 ) $ 195,180 (D) Segment Assets $ 6,843,935 $ 2,141,700 $ 1,067,176 $ 1,028,463 $ 11,081,274 (E) Depreciation, Depletion and Amortization $ 92,083 $ 43,459 $ 11,302 $ — $ 146,844 Capital Expenditures $ 209,560 $ 34,978 $ 3,240 $ — $ 247,778 (C) Included in the PA Mining Operations segment are sales of $73,780 to Duke Energy, which comprises over 10% of sales. (D) Includes equity in earnings of unconsolidated affiliates of $13,467 and $2,121 for E&P and Other, respectively. (E) Includes investments in unconsolidated equity affiliates of $205,987 and $4,105 for E&P and Other, respectively.
Reconciliation of Revenue and Operating Income from Segments to Consolidated	For the Three Months Ended September 30, For the Nine Months Ended September 30, Income (Loss) Before Income Taxes: 2016 2015 2016 2015 Segment Income (Loss) Before Income Taxes for reportable business segments $ 195,816 $ 182,514 $ (75,798 ) $ (472,660 ) Segment (Loss) Income Before Income Taxes for all other business segments (33,073 ) 61,522 (65,737 ) 45,000 Interest expense, net (47,317 ) (48,558 ) (144,609 ) (150,185 ) Eliminations — (298 ) (424 ) (1,194 ) Loss on debt extinguishment — — — (67,751 ) Income (Loss) Before Income Taxes $ 115,426 $ 195,180 $ (286,568 ) $ (646,790 )
Reconciliation of Assets and Liabilities from Segment to Consolidated	Total Assets: September 30, 2016 2015 Segment assets for total reportable business segments $ 8,544,977 $ 8,985,635 Segment assets for all other business segments 794,917 914,042 Items excluded from segment assets: Cash and other investments 73,809 79,887 Recoverable income taxes — 64,693 Deferred tax assets 149,680 8,554 Discontinued Operations 2,111 1,028,463 Total Consolidated Assets $ 9,565,494 $ 11,081,274

Guarantor Subsidiaries Financia

Guarantor Subsidiaries Financial Information (Tables)	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Condensed Financial Statements, Captions [Line Items]
Guarantor FInancial Statements [Table Text Block] [Table Text Block]	Income Statement for the Three Months Ended September 30, 2015 (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 $ — $ 157,835 $ — $ — $ — $ (297 ) $ 157,538 Gain on Commodity Derivative Instruments — 143,606 — — — — 143,606 Coal Sales — — 242,378 80,793 — — 323,171 Other Outside Sales — — 5,129 — — — 5,129 Purchased Gas Sales — 2,535 — — — — 2,535 Freight-Outside Coal — — 2,134 302 — — 2,436 Miscellaneous Other Income 156,955 16,122 22,194 330 (171 ) (156,955 ) 38,475 Gain on Sale of Assets — 890 47,140 13 — — 48,043 Total Revenue and Other Income 156,955 320,988 318,975 81,438 (171 ) (157,252 ) 720,933 Costs and Expenses: Exploration and Production Costs Lease Operating Expense — 29,452 — — — — 29,452 Transportation, Gathering and Compression — 89,965 — — — — 89,965 Production, Ad Valorem, and Other Fees — 8,475 — — — — 8,475 Depreciation, Depletion and Amortization — 92,083 — — — — 92,083 Exploration and Production Related Other Costs — 3,332 — — 15 (15 ) 3,332 Purchased Gas Costs — 1,921 — — — — 1,921 Other Corporate Expenses — 20,953 — — — — 20,953 Selling, General, and Administrative Costs — 23,919 — — — — 23,919 Total Exploration and Production Costs — 270,100 — — 15 (15 ) 270,100 PA Mining Operations Costs Operating and Other Costs — — 90,823 46,936 — — 137,759 Depreciation, Depletion and Amortization — — 32,671 10,788 — — 43,459 Freight Expense — — 2,134 302 — — 2,436 Selling, General, and Administrative Costs — — 6,428 2,616 — — 9,044 Total PA Mining Operations Costs — — 132,056 60,642 — — 192,698 Other Costs Miscellaneous Operating Expense 16,543 — (19,665 ) — 44 — (3,078 ) Selling, General, and Administrative Costs — — 6,173 — — — 6,173 Depreciation, Depletion and Amortization 154 — 11,148 — — — 11,302 Interest Expense 44,385 701 1,600 1,872 — — 48,558 Total Other Costs 61,082 701 (744 ) 1,872 44 — 62,955 Total Costs And Expenses 61,082 270,801 131,312 62,514 59 (15 ) 525,753 Earnings (Loss) Before Income Tax 95,873 50,187 187,663 18,924 (230 ) (157,237 ) 195,180 Income Taxes (23,107 ) 19,841 69,222 — (88 ) — 65,868 Income (Loss) From Continuing Operations 118,980 30,346 118,441 18,924 (142 ) (157,237 ) 129,312 Loss From Discontinued Operations, net — — — — (3,842 ) — (3,842 ) Net Income (Loss) $ 118,980 $ 30,346 $ 118,441 $ 18,924 $ (3,984 ) $ (157,237 ) $ 125,470 Less: Net Income Attributable to Noncontrolling Interests — — — — — 6,490 6,490 Net Income (Loss) Attributable to CONSOL Energy Shareholders $ 118,980 $ 30,346 $ 118,441 $ 18,924 $ (3,984 ) $ (163,727 ) $ 118,980
Guarantor Condensed Cash Flow [Table Text Block]		Cash Flow for the Nine Months Ended September 30, 2015 (unaudited): Parent CNX Gas Guarantor Other Subsidiary Guarantors CNXC Non-Guarantor Other Subsidiary Non- Guarantors Elimination Consolidated Net Cash (Used in) Provided by Continuing Operations $ (130,726 ) $ 712,504 $ (329,261 ) $ 47,465 $ 20,053 $ 73,480 $ 393,515 Net Cash Provided by Discontinued Operating Activities — — — — 10,768 — 10,768 Net Cash (Used in) Provided by Operating Activities $ (130,726 ) $ 712,504 $ (329,261 ) $ 47,465 $ 30,821 $ 73,480 $ 404,283 Cash Flows from Investing Activities: Capital Expenditures $ (8,607 ) $ (749,015 ) $ (80,928 ) $ (25,712 ) $ — $ — $ (864,262 ) Proceeds From Sales of Assets 47 3,600 79,327 70 — — 83,044 Net Investments in Equity Affiliates — (62,860 ) (7,364 ) — — — (70,224 ) Net Cash Used in Continuing Operations (8,560 ) (808,275 ) (8,965 ) (25,642 ) — — (851,442 ) Net Cash Used in Discontinued Investing Activities — — — — (30,894 ) — (30,894 ) Net Cash Used in Investing Activities $ (8,560 ) $ (808,275 ) $ (8,965 ) $ (25,642 ) $ (30,894 ) $ — $ (882,336 ) Cash Flows from Financing Activities: Proceeds from (Payments on) Short-Term Borrowings $ 945,000 $ 70,000 $ — $ — $ — $ (70,000 ) $ 945,000 (Payments on) Proceeds from Miscellaneous Borrowings (6,853 ) (4,823 ) 4,148 6,005 — — (1,523 ) Payments on Long-Term Borrowings (1,263,719 ) — — — — — (1,263,719 ) Proceeds from Long-Term Borrowings 492,760 — — — — — 492,760 Proceeds from Revolver - MLP — — 200,000 180,000 — (200,000 ) 180,000 Proceeds from Sale of MLP Interest — — 148,359 148,359 — (148,359 ) 148,359 Net Distributions from Offering to Parent — — — (342,711 ) — 342,711 — Net Change in Parent Advancements — — — (5,789 ) — 5,789 — Pre-Merger Distributions to Parent — — — (355 ) — 355 — Tax Benefit from Stock-Based Compensation 208 — — — — — 208 Dividends Paid (30,991 ) — — — — — (30,991 ) Proceeds from Issuance of Common Stock 8,288 — — — — — 8,288 Treasury Stock Activity (71,674 ) — — — — — (71,674 ) Debt Issuance and Financing Fees — — (14,281 ) (4,329 ) — (3,976 ) (22,586 ) Net Cash Provided by (Used in) Continuing Operations 73,019 65,177 338,226 (18,820 ) — (73,480 ) 384,122 Net Cash Used in Discontinued Financing Activities — — — — (39 ) — (39 ) Net Cash Provided by (Used in) Financing Activities $ 73,019 $ 65,177 $ 338,226 $ (18,820 ) $ (39 ) $ (73,480 ) $ 384,083
Guarantor Condensed Comprehensive Income [Table Text Block]	Statement of Comprehensive Income for the Three Months Ended September 30, 2015 (unaudited): Parent CNX Gas Guarantor Other Subsidiary Guarantors CNXC Non- Guarantor Other Subsidiary Non- Guarantors Elimination Consolidated Net Income (Loss) $ 118,980 $ 30,346 $ 118,441 $ 18,924 $ (3,984 ) $ (157,237 ) $ 125,470 Other Comprehensive (Loss) Income: Actuarially Determined Long-Term Liability Adjustments (49,353 ) — (49,337 ) (16 ) — 49,353 (49,353 ) Reclassification of Cash Flow Hedge from OCI to Earnings (20,602 ) (20,602 ) — — — 20,602 (20,602 ) Other Comprehensive (Loss) Income: (69,955 ) (20,602 ) (49,337 ) (16 ) — 69,955 (69,955 ) Comprehensive Income (Loss) 49,025 9,744 69,104 18,908 (3,984 ) (87,282 ) 55,515 Less: Net Income Attributable to Noncontrolling Interest — — — — — 6,490 6,490 Comprehensive Income (Loss) Attributable to CONSOL Energy Inc. Shareholders $ 49,025 $ 9,744 $ 69,104 $ 18,908 $ (3,984 ) $ (93,772 ) $ 49,025
Guarantor Balance Sheet [Table Text Block]	Balance Sheet at December 31, 2015 : Parent Issuer CNX Gas Guarantor Other Subsidiary Guarantors CNXC Non-Guarantor Other Subsidiary Non- Guarantors Elimination Consolidated Assets: Current Assets: Cash and Cash Equivalents $ 64,995 $ 75 $ — $ 6,534 $ 970 $ — $ 72,574 Accounts and Notes Receivable: Trade — 72,664 59,321 19,398 — — 151,383 Other Receivables 18,933 99,001 3,330 471 — — 121,735 Inventories — 13,815 40,739 12,238 — — 66,792 Recoverable Income Taxes 72,913 (59,026 ) — — — — 13,887 Prepaid Expenses 27,245 244,680 20,273 5,089 — — 297,287 Current Assets of Discontinued Operations — — — — 81,106 — 81,106 Total Current Assets 184,086 371,209 123,663 43,730 82,076 — 804,764 Property, Plant and Equipment: Property, Plant and Equipment 156,348 8,875,027 3,898,005 865,527 — — 13,794,907 Less-Accumulated Depreciation, Depletion and Amortization 111,367 2,695,674 1,854,249 400,911 — — 5,062,201 Property, Plant and Equipment of Discontinued Operations — — — — 936,670 — 936,670 Total Property, Plant and Equipment-Net 44,981 6,179,353 2,043,756 464,616 936,670 — 9,669,376 Other Assets: Investment in Affiliates 10,563,985 234,803 6,293 — — (10,567,751 ) 237,330 Other 53,529 47,892 95,369 17,598 — — 214,388 Other Assets of Discontinued Operations — — — — 4,044 — 4,044 Total Other Assets 10,617,514 282,695 101,662 17,598 4,044 (10,567,751 ) 455,762 Total Assets $ 10,846,581 $ 6,833,257 $ 2,269,081 $ 525,944 $ 1,022,790 $ (10,567,751 ) $ 10,929,902 Liabilities and Equity: Current Liabilities: Accounts Payable $ 32,245 $ 149,930 $ 37,212 $ 17,405 $ — $ 13,817 $ 250,609 Accounts Payable (Recoverable)-Related Parties 2,650,732 1,521,442 (3,953,215 ) 4,310 (209,452 ) (13,817 ) — Current Portion of Long-Term Debt (2,777 ) 6,798 906 61 — — 4,988 Short-Term Notes Payable 952,000 — — — — — 952,000 Other Accrued Liabilities 63,668 102,753 218,186 37,220 — — 421,827 Current Liabilities of Discontinued Operations — — — — 51,514 — 51,514 Total Current Liabilities 3,695,868 1,780,923 (3,696,911 ) 58,996 (157,938 ) — 1,680,938 Long-Term Debt: 2,423,247 33,141 105,746 181,070 5,001 — 2,748,205 Deferred Credits and Other Liabilities: Deferred Income Taxes (122,547 ) 197,176 — — — — 74,629 Postretirement Benefits Other Than Pensions — — 630,892 — — — 630,892 Pneumoconiosis Benefits — — 109,969 1,934 — — 111,903 Mine Closing — — 218,936 8,403 — — 227,339 Gas Well Closing — 135,174 28,572 96 — — 163,842 Workers’ Compensation — — 66,883 2,929 — — 69,812 Salary Retirement 91,596 — — — — — 91,596 Reclamation — — 25 — — — 25 Other 56,390 105,588 4,266 713 — — 166,957 Deferred Credits and Other Liabilities of Discontinued Operations — — — — 107,988 — 107,988 Total Deferred Credits and Other Liabilities 25,439 437,938 1,059,543 14,075 107,988 — 1,644,983 Total CONSOL Energy Inc. Stockholders’ Equity 4,702,027 4,581,255 4,800,703 271,803 1,067,739 (10,721,500 ) 4,702,027 Noncontrolling Interest — — — — — 153,749 153,749 Total Liabilities and Equity $ 10,846,581 $ 6,833,257 $ 2,269,081 $ 525,944 $ 1,022,790 $ (10,567,751 ) $ 10,929,902

Basis of Presentation Anti-Dilu

Basis of Presentation Anti-Dilutive Options and Units Exluded from Earnings Per Share (Details) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from the computation of diluted earnings per share	5,454,883	5,239,253	10,004,325	5,847,783
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	2,989,610	3,650,864	6,230,099	3,650,864
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	3,455	785,585	645,302	1,394,115
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	1,659,014	0	2,326,120	0
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	802,804	802,804

Basis of Presentation Share-bas

Basis of Presentation Share-based Compensation (Details) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price		$ 22,780		$ 22,780
Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures	5,920	90,055	574,310	1,437,316
Performance Share Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Exercised	0	0	0	497,134
Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Exercised	0	0	0	363,620
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Exercised	5,920	90,055	574,310	576,562

Basis of Presentation Earnings

Basis of Presentation Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Net Income (Loss) Attributable to Noncontrolling Interest	$ 2,248	$ 6,490	$ 4,541	$ 6,490
Income (Loss) from Continuing Operations Attributable to Parent	62,568	129,312	(214,770)	(395,609)
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent	(34,975)	(3,842)	(322,747)	(3,192)
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	27,593	125,470	(537,517)	(398,801)
Net Income (Loss)	$ 25,345	$ 118,980	$ (542,058)	$ (405,291)
Weighted average shares of common stock outstanding:
Basic	229,438,612	229,036,172	229,369,309	229,230,571
Effect of stock-based compensation awards	2,079,973	315,955	0	0
Dilutive	231,518,585	229,352,127	229,369,309	229,230,571
Earnings Per Share:
Income (Loss) from Continuing Operations, Per Basic Share	$ 0.26	$ 0.54	$ (0.96)	$ (1.75)
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share	(0.15)	(0.02)	(1.40)	(0.02)
Earnings Per Share, Basic	0.11	0.52	(2.36)	(1.77)
Income (Loss) from Continuing Operations, Per Diluted Share	0.26	0.54	(0.96)	(1.75)
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share	(0.15)	(0.02)	(1.40)	(0.02)
Earnings Per Share, Diluted	$ 0.11	$ 0.52	$ (2.36)	$ (1.77)

Basis of Presentation Changes i

Basis of Presentation Changes in Accumulated Other Comprehensive Income / (Loss) by component (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Accumulated Other Comprehensive Income (Loss) [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost	$ 9,835	$ (88,959)	$ 34,453	$ (119,525)
Accumulated Other Comprehensive Income (Loss), Net of Tax	(342,207)		(342,207)		$ (315,598)
Other Comprehensive Income (Loss), Net of Tax	(11,153)	$ (69,955)	(26,609)	$ (100,756)
Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	(342,207)		(342,207)		(315,598)
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax			(13,912)
Other Comprehensive Income (Loss), Net of Tax			(26,609)
Amounts reclassified from accumulated other comprehensive income			(12,697)
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	9,995		9,995		43,470
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax	0
Other Comprehensive Income (Loss), Net of Tax	(33,475)
Amounts reclassified from accumulated other comprehensive income	(33,475)
Accumulated Defined Benefit Plans Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	$ (352,202)		(352,202)		$ (359,068)
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax			(13,912)
Other Comprehensive Income (Loss), Net of Tax			6,866
Amounts reclassified from accumulated other comprehensive income			$ 20,778

Basis of Presentation Reclassif

Basis of Presentation Reclassification of adjustments out of Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, before Tax	$ (19,597)	$ (32,409)	$ (52,759)	$ (95,843)
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Tax	7,139	11,807	19,284	35,123
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax	(12,458)	(20,602)	(33,475)	(60,720)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	(148)	(133,851)	(443)	(203,159)
Defined Benefit Plan, Amortization of Gains (Losses)	6,332	41,755	17,549	80,497
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Curtailments		5		5
Other Comprehensive Income (Loss), Finalization of Pension and Other Postretirement Benefit Plan Valuation, before Tax	3,651	3,132	17,347	3,132
Defined Benefit Plan, Net Periodic Benefit Cost	9,835	(88,959)	34,453	(119,525)
Tax Expense on Actuarially Determined Long-Term Liabilities	(3,664)	33,436	(12,861)	44,923
Actuarially Determined Long-Term Liability Adjustments, Net of Tax	6,171	(55,523)	21,592	(74,602)
Buchanan and Other Assets [Member]
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax			815
Defined Benefit Plan, Net Periodic Benefit Cost		74	(1,290)	223
Pension Plan [Member]
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	(148)	(166)	(443)	(518)
Defined Benefit Plan, Amortization of Gains (Losses)	2,743	5,335	6,975	19,215
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Curtailments	0	5	0	5
Defined Benefit Plan, Net Periodic Benefit Cost	$ 1,428	$ 5,607	$ 9,969	$ 15,616

Discontinued Operations Stateme

Discontinued Operations Statement $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016USD ($)	Sep. 30, 2015USD ($)	Sep. 30, 2016USD ($)TRate	Sep. 30, 2015USD ($)	Dec. 31, 2015USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash Paid to Close Deal	$ 28,271		$ 28,271
Escrow Deposits Related to Property Sales			17,200
Gain (Loss) on Sale of Assets and Asset Impairment Charges			53,130
Impairment of Long-Lived Assets to be Disposed of	0	$ 0	$ 355,681	$ 0
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
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, Property, Plant and Equipment	0		$ 0		$ 936,670
Disposal Group, Including Discontinued Operation, Assets, Current	2,111		2,111		81,106
Disposal Group, Including Discontinued Operation, Other Assets, Noncurrent	0		0		4,044
Disposal Group, Including Discontinued Operation, Liabilities, Current	664		664		51,514
Disposal Group, including discontinued operations, reclamation, non-current	0		0		34,126
Disposal Group, Including Discontinued Operation, Liabilities, Noncurrent	0		0		5,001
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	6,974	80,432	102,904	286,557
Disposal Group, Including Discontinued Operations, Cargo and Freight Revenue	305	783	1,322	3,791
Disposal Group, Including Discontinued Operation, Other Income	2,204	3	2,237	33
Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax	53,119	(80)	91,372	(274)
Disposal Group, Including Discontinued Operation, Revenue	(43,636)	81,298	15,091	290,655
Disposal Group, Including Discontinued Operation, Operating Expense	11,789	92,865	124,865	302,055
Disposal Group, Including Discontinued Operation, Operating Income (Loss)	(55,425)	(11,567)	(109,774)	(11,400)
Discontinued Operation, Tax Effect of Discontinued Operation	(20,450)	(7,725)	(142,708)	(8,208)
Disposal Group, Including Discontinued Operation, Operating Income (Loss)	(34,975)	$ (3,842)	(322,747)	$ (3,192)
Disposal Group, Including Discontinued Operation, Accounts, Notes and Loans Receivable, Net	2,107		2,107		49,125
Disposal Group, Including Discontinued Operation, Inventory	0		0		30,646
Disposal Group, Including Discontinued Operation, Prepaid and Other Assets	0		0		970
Disposal Group, Including Discontinued Operation, Prepaid and Other Assets, Current	4		4		365
Disposal Group, Including Discontinued Operation, Property, Plant and Equipment	0		0		936,670
Disposal Group, Including Discontinued Operation, Assets, Current	2,111		2,111		81,106
Disposal Group, Including Discontinued Operation, Other Assets, Noncurrent	0		0		4,044
Disposal Group, Including Discontinued Operation, Assets	2,111		2,111		1,021,820
Disposal Group, Including Discontinued Operation, Accounts Payable	303		303		20,786
Disposal Group, Including Discontinued Operation, Liabilities, Current	361		361		30,728
Disposal Group, including discontinued operations, Pneumoconiosis Benefits	0		0		1,129
Disposal Group, including discontinued operations, Mine Closing non current	0		0		71,941
Disposal Group, Including Discontinued Operation, Liabilities, Noncurrent	0		0		5,001
Disposal Group, Including Discontinued Operation, Other Liabilities, Noncurrent	0		0		792
Disposal Group, Including Discontinued Operation, Liabilities	$ 664		$ 664		$ 164,503

Acquisitions (Details)

Acquisitions (Details) a in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2015USD ($)	Sep. 30, 2016USD ($)	Sep. 30, 2015USD ($)	Dec. 31, 2015USD ($)a
Business Acquisition [Line Items]
Payments to Acquire Property, Plant, and Equipment		$ 179,389,000	$ 864,262,000
Other Liabilities, Noncurrent		172,218,000		$ 166,957,000
Columbia Energy Ventures [Member]
Business Acquisition [Line Items]
Business Acquisition, Transaction Costs				$ 96,106,000
Payments to Acquire Property, Plant, and Equipment		9,000	50,970,000
Gas and Oil Area, Undeveloped, Gross | a				20,000
Other Liabilities, Current		3,947,000
Other Long-term Debt, Noncurrent		26,461,000
Other Liabilities, Noncurrent		$ 8,349		$ 29,333
Western Allegheny Energy [Member]
Business Acquisition [Line Items]
Proceeds from Sale of Property, Plant, and Equipment	$ 76,297,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities	2,136,000		$ 2,136,000
Proceeds from Equity Method Investment, Dividends or Distributions	10,780,000
Gain (Loss) on Disposition of Property Plant Equipment	$ 48,468,000

Other Income (Details)

Other Income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Proceeds from Contributions from Affiliates	$ 1,202	$ 2,855	$ 4,530	$ 9,068
Gain (Loss) on Contract Termination	0	0	6,288	0
Gas Gathering, Transportation, Marketing and Processing Revenue	2,602	1,426	7,998	7,379
Rental Income, Nonoperating	8,983	9,439	27,258	28,437
Royalty Revenue	2,011	4,847	6,664	12,989
Revenue, Coal Services	1,908	0	2,512	1,596
Interest Income, Other	214	361	975	1,868
Right of Way Income	149	5,252	17,952	13,202
Other Nonoperating Income	1,171	1,562	3,273	6,970
Other Income (including equity earnings)	32,393	38,475	114,159	111,279
CONE [Member]
Proceeds from Contributions from Affiliates	$ 14,153	$ 12,733	$ 36,709	$ 29,770

Pension and OPEB - Periodic C49

Pension and OPEB - Periodic Cost (Details) - USD ($) $ in Thousands	3 Months Ended		5 Months Ended	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	May 31, 2015	Sep. 30, 2016	Sep. 30, 2015	Jun. 30, 2016
Defined Benefit Plan Disclosure [Line Items]
Remeasurement of the Actuarially Determined Long-Term Liabilities	$ 7,486			$ 7,486		$ 6,203
Remeasurement of actuarially determined liabilities, tax effect	1,070
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	(148)	$ (133,851)		(443)	$ (203,159)
Amortization of actuarial gain	6,332	41,755		17,549	80,497
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Curtailments		5			5
Defined Benefit Plan, Net Periodic Benefit Cost	9,835	(88,959)		34,453	(119,525)
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Settlements	(3,651)	(3,132)		(17,347)	(3,132)
Remeasurement of the Actuarially Determined Long-Term Liabilities		1,328			1,328
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Service cost	482	2,162		1,445	6,862
Interest cost	5,895	8,042		19,578	25,202
Expected return on plan assets	(11,195)	(12,903)		(34,933)	(38,282)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	(148)	(166)		(443)	(518)
Amortization of actuarial gain	2,743	5,335		6,975	19,215
Pension Contributions				1,964	8,366
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Curtailments	0	5		0	5
Defined Benefit Plan, Net Periodic Benefit Cost	1,428	5,607		9,969	15,616
Other Postretirement Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Settlements	0	0		0	0
Defined Benefit Plan, Plan Amendments			$ 43,598
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Service cost	0	0		0	0
Interest cost	6,060	6,677		18,181	20,561
Expected return on plan assets	0	0		0	0
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	0	(133,685)		0	(202,641)
Amortization of actuarial gain	4,792	37,713		14,376	65,161
Defined Benefit Plan, Benefits Paid				35,120	40,547
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Curtailments		0		0	0
Defined Benefit Plan, Net Periodic Benefit Cost	$ 10,852	(89,295)		$ 32,557	(116,919)
Plan Amendment [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Remeasurement of the Actuarially Determined Long-Term Liabilities		17,793			$ 17,793
Defined Benefit Plan, Curtailments		$ 26,352

CWP and Workers Comp - Net Pe50

CWP and Workers Comp - Net Periodic Costs (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Remeasurement of the Actuarially Determined Long-Term Liabilities			$ 5,014
Amortization of actuarial gain	$ 6,332	$ 41,755	17,549	$ 80,497
Defined Benefit Plan, Net Periodic Benefit Cost	9,835	(88,959)	34,453	(119,525)
Workers Compensation [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Settlements and Curtailments	0	0	0	0
Service cost	1,904	2,347	5,713	7,042
Interest cost	638	799	1,913	2,396
Amortization of actuarial gain	(101)	(8)	(303)	(23)
Defined Benefit Plan, Administration Expenses	792	888	2,491	2,764
Payments for Postemployment Benefits			11,547	12,540
Defined Benefit Plan, Net Periodic Benefit Cost	3,233	4,026	9,814	12,179
Coal Workers Pneumoconiosis [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Settlements and Curtailments	0	0	(1,307)	0
Service cost	1,041	1,623	3,285	4,868
Interest cost	1,053	1,279	3,230	3,837
Amortization of actuarial gain	(1,188)	(1,394)	(3,759)	(4,182)
Defined Benefit Plan, Administration Expenses	0	0	0	0
Payments for Coal Workers Pnenumoconiosis			8,519	8,369
Defined Benefit Plan, Net Periodic Benefit Cost	$ 906	1,508	1,449	4,523
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		$ 74	$ (1,290)	$ 223

Income Taxes Income Tax Reconci

Income Taxes Income Tax Reconciliation (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Effective Income Tax Rate Reconciliation, Percent	46.70%	34.90%	24.70%	38.40%
Unrecognized Tax Benefits	$ 15,536		$ 15,536		$ 12,702
Uncertain tax positions, effect if recognized			2,834
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	242		242		$ 53
Unrecognized Tax Benefits, Interest on Income Taxes Accrued	$ 189		$ 189

Inventory Components (Details)

Inventory Components (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Inventory Disclosure [Abstract]
Coal	$ 8,367	$ 4,660
Supplies	54,255	62,132
Total Inventories	$ 62,622	$ 66,792

Accounts Receivable Securitiz53

Accounts Receivable Securitization (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2016USD ($)
ACCOUNTS RECEIVABLE SECURITIZATION: [Abstract]
Financing Related Fees	$ 3,000

Property, Plant and Equipment54

Property, Plant and Equipment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Property, Plant and Equipment [Line Items]
Impairment of Oil and Gas Properties	$ 0	$ 0	$ 0	$ 828,905
Drilling Cost	3,515,485		3,515,485		$ 3,452,989
Unproven gas properties	1,429,905		1,429,905		1,421,083
Gas gathering equipment	1,133,840		1,133,840		1,147,173
Gas wells and related equipment	819,902		819,902		785,744
Other gas assets	127,984		127,984		125,691
Gas advance royalties	15,265		15,265		19,745
Proven gas properties	1,933,211		1,933,211		1,922,602
Coal and other plant and equipment	2,300,650		2,300,650		2,284,175
Coal Lands and or Surface Rights	457,372		457,372		456,044
Property, Plant and Equipment, Other, Gross	368,031		368,031		351,870
Mine development	326,153		326,153		326,153
Coal advance mining royalties	16,294		16,294		16,263
Leased coal lands	26,569		26,569		26,402
Property, Plant and Equipment	13,920,715		13,920,715		13,794,907
Less Accumulated depreciation, depletion and amortization	5,506,096		5,506,096		5,062,201
Total Property, Plant and Equipment-Net	8,414,619		8,414,619		9,669,376
Proved Developed [Member]
Property, Plant and Equipment [Line Items]
Impairment of Oil and Gas Properties				824,742
Unproved Property [Member]
Property, Plant and Equipment [Line Items]
Impairment of Oil and Gas Properties				$ 4,163
Gas Segment [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment	8,975,592		8,975,592		8,875,027
Less Accumulated depreciation, depletion and amortization	3,002,288		3,002,288		2,695,674
Total Property, Plant and Equipment-Net	5,973,304		5,973,304		6,179,353
PA Operations [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment	3,495,069		3,495,069		3,460,907
Less Accumulated depreciation, depletion and amortization	1,728,423		1,728,423		1,603,642
Total Property, Plant and Equipment-Net	1,766,646		1,766,646		1,857,265
Other Segments [Member]
Property, Plant and Equipment [Line Items]
Coal and other plant and equipment	561,575		561,575		569,261
Coal Lands and or Surface Rights	481,371		481,371		313,493
Property, Plant and Equipment, Other, Gross	10,002		10,002		10,002
Mine development	17,987		17,987		18,145
Coal advance mining royalties	314,537		314,537		312,452
Leased coal lands	64,582		64,582		235,620
Property, Plant and Equipment	1,450,054		1,450,054		1,458,973
Less Accumulated depreciation, depletion and amortization	775,385		775,385		762,885
Total Property, Plant and Equipment-Net	$ 674,669		$ 674,669		$ 696,088

Property, Plant and Equipment J

Property, Plant and Equipment Joint Venture Activity (Details) a in Thousands, $ in Thousands	9 Months Ended
	Sep. 30, 2016USD ($)a
Noble JV [Member]
Property, Plant and Equipment [Line Items]
drill carry remaining	$ 1,624,448
Drilling commitment carry	1,846,000
Maximum Drilling Commitment Carry	$ 400,000
Gas and Oil Acreage, Unproved, Net | a	700
Hess [Member]
Property, Plant and Equipment [Line Items]
drill carry remaining	$ 6,193
Maximum Drilling Commitment Carry	$ 335,000
Gas and Oil Acreage, Unproved, Net | a	155

Short-Term Notes Payable (Detai

Short-Term Notes Payable (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2016USD ($)	Dec. 31, 2015USD ($)
Short-term Debt [Line Items]
Credit facility, face amount	$ 400,000
Notes and Loans Payable, Current	354,000	$ 952,000
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	3.99
Current Ratio	2.73
Senior secured leverage ratio, maximum	1
Current secured leverage ratio	2.75
Short-term Debt	$ 354,000
Letters of credit outstanding	323,761	258,177
Borrowings and issuance of letters of credit remaining capacity	$ 1,322,239	$ 789,823

Long-Term Debt (Details)

Long-Term Debt (Details) - USD ($)	3 Months Ended			9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Mar. 31, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Debt Instrument [Line Items]
Debt Issuance Costs, current	$ 4,422,000			$ 4,422,000
Payments of Debt Issuance Costs				482,000	$ 22,586,000
Capital Lease Obligations, Current	7,019,000			7,019,000		$ 7,590,000
Long-term debt	(2,731,455,000)	$ (2,508,000)		(2,731,455,000)	(2,508,000)	(2,705,718,000)
Unamortized Debt Issuance Expense	29,028,000			29,028,000		33,017,000
Long-term Line of Credit, Noncurrent	208,000,000			208,000,000
Long-Term Debt	2,734,004,000			2,734,004,000		2,708,320,000
Less amounts due in one year	1,873,000			1,873,000		1,820,000
Long Term Debt, Current Maturities - Net of unamortized debt issuance costs	(2,549,000)			(2,549,000)		(2,602,000)
Gains (Losses) on Extinguishment of Debt	0	0	$ 17,000	0	67,751,000
Senior notes due April 2020 at 8.25%
Debt Instrument [Line Items]
Long-term debt	(74,470,000)			(74,470,000)		(74,470,000)
Long-term Debt, Percentage Bearing Fixed Interest, Amount		0.0825			0.0825
Gains (Losses) on Extinguishment of Debt					67,734,000
Senior Secured Notes Due March 2021 Par Value Amount Purchased [Member]
Debt Instrument [Line Items]
Long-term debt	(229,176,000)			(229,176,000)
Senior notes due March 2021 at 6.375%
Debt Instrument [Line Items]
Long-term debt	(20,611,000)	(213,000)		(20,611,000)	(213,000)	(20,611,000)
Long-term Debt, Percentage Bearing Fixed Interest, Amount		0.06375			0.06375
Senior Secured Notes Due March 2021 Par Value [Member] [Member] [Member]
Debt Instrument [Line Items]
Long-term debt	(1,854,953,000)			(1,854,953,000)		(1,855,617,000)
Senior Notes due April 2023 at 8.0% [Member]
Debt Instrument [Line Items]
Long-term debt	(494,118,000)			(494,118,000)		(493,439,000)
Long-term Debt, Percentage Bearing Fixed Interest, Amount		0.0800			0.0800
Long-term Debt, Gross		500,000,000			500,000,000
Debt Instrument, Unamortized Discount		7,240,000			7,240,000
Senior Notes 8.25 Percent Due April 2020 Amount Purchased [Member]
Debt Instrument [Line Items]
Long-term debt		$ (937,822,000)			$ (937,822,000)
Baltimore Port Facility revenue bonds in series due September 2025 at 5.75%
Debt Instrument [Line Items]
Long-term debt	(102,865,000)			(102,865,000)		(102,865,000)
Advance royalty commitments
Debt Instrument [Line Items]
Long-term debt	(3,482,000)			(3,482,000)		(3,964,000)
Other long-term notes maturing at various dates through 2031
Debt Instrument [Line Items]
Long-term debt	(1,984,000)			(1,984,000)		(2,769,000)
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Long-term debt	$ (208,000,000)			$ (208,000,000)		(185,000,000)
Line of Credit Facility, Maximum Borrowing Capacity						$ 400,000,000

Commitments and Contingencies A

Commitments and Contingencies Additional Information (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Dec. 31, 2015
Commitments and Contingencies Disclosure [Line Items]
Loss Contingency, Range of Possible Loss, Portion Not Accrued	$ 642,852
civil penalty	3,000
Murray Energy [Member]
Commitments and Contingencies Disclosure [Line Items]
Contractual Obligation	$ 1,463	$ 1,228

Unrecorded Unconditional Purcha

Unrecorded Unconditional Purchase Obligation (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Unrecorded Unconditional Purchase Obligation [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	$ 1,073,495
Balance on First Anniversary [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	800,091
More Than One And Within Three Years From Balance Sheet Date [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	255,859
More Than Three And Within Five Years From Balance Sheet Date [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	13,862
Beyond Five Years of Balance Sheet Date [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	3,683
Standby Letters of Credit [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	323,761
Standby Letters of Credit [Member] | Balance on First Anniversary [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	93,049
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	230,712
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	663,762
Surety Bonds [Member] | Balance on First Anniversary [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	656,999
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	6,761
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	2
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	85,972
Guarantees [Member] | Balance on First Anniversary [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	50,043
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	18,386
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	13,860
Guarantees [Member] | Beyond Five Years of Balance Sheet Date [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	3,683
Employee Related Commitments [Member] | Standby Letters of Credit [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	82,273
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	54,574
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	27,699
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	112,810
Employee Related Commitments [Member] | Surety Bonds [Member] | Balance on First Anniversary [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	111,760
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	1,050
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	998
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	0
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	528,430
Environment Related Commitments [Member] | Surety Bonds [Member] | Balance on First Anniversary [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	523,868
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	4,562
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	240,490
Other Commitments [Member] | Standby Letters of Credit [Member] | Balance on First Anniversary [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	37,477
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	203,013
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	22,522
Other Commitments [Member] | Surety Bonds [Member] | Balance on First Anniversary [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	21,371
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	1,149
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	2
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	77,622
Other Commitments [Member] | Guarantees [Member] | Balance on First Anniversary [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	41,693
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	18,386
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	13,860
Other Commitments [Member] | Guarantees [Member] | Beyond Five Years of Balance Sheet Date [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	3,683
Coal Segment [Member] | Guarantees [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	8,350
Coal Segment [Member] | Guarantees [Member] | Balance on First Anniversary [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	8,350
Coal Segment [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	0
Coal Segment [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	0
Coal Segment [Member] | Guarantees [Member] | Beyond Five Years of Balance Sheet Date [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	0
Murray Energy [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Contractual Obligation	1,463	$ 1,228
Purchase Commitment [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Less than 1 year	199,528
1 - 3 years	270,334
3 - 5 years	223,058
More than 5 years	587,331
Total Purchase Obligations	$ 1,280,251

Derivative Instruments (Details

Derivative Instruments (Details) $ in Thousands, MMcf in Billions	3 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2016USD ($)	Sep. 30, 2016USD ($)MMcf	Dec. 31, 2014MMcf	Dec. 31, 2015USD ($)
Derivative [Line Items]
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, tax effect	$ 9,995	$ 5,727
Commodity Member [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount, Volume | MMcf		597.1	456.1
Derivative Liability, Current	40,636	$ 40,636		$ 5,137
Derivative Liability, Noncurrent	51,829	51,829		0
Derivative Asset, Noncurrent	$ 39,124	$ 39,124		$ 44,539
Basis Member [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount, Volume | MMcf		360.6	124.4
Propane [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount, Volume | MMcf		0.3

The Effect of Derivative Instru

The Effect of Derivative Instruments on the Consolidated Statement of Income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015	Dec. 31, 2014	Jun. 30, 2014
Derivative [Line Items]
Derivative, Cash Received on Hedge	$ 38,637	$ 44,469	$ 203,303	$ 116,868
Unrealized Gain (Loss) on Commodity Derivatives	198,192	143,606	53,872	251,073
Accumulated Other Comprehensive Income (Loss), Net of Tax	(342,207)		(342,207)		$ (315,598)
Derivative Instruments, Gain Reclassified from Accumulated OCI into Income, Effective Portion	(12,458)	(20,602)	(33,475)	(60,720)
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	(12,458)	(20,602)	(33,475)	(60,720)
Unrealized Gain (Loss) on Derivatives and Commodity Contracts	159,555	99,137	(149,431)	134,205
Gain (Loss) on Hedging Activity	198,192	143,606	53,872	251,073
Swap [Member]
Derivative [Line Items]
Derivative, Cash Received on Hedge	28,175	43,169	201,624	115,525
Unrealized Gain (Loss) on Derivatives and Commodity Contracts	54,676	70,362	(289,722)	41,189
Gain (Loss) on Hedging Activity	82,851	113,531	(88,098)	156,714
Swap [Member] | Cash Flow Hedging [Member] | Natural Gas [Member]
Derivative [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax		22,453		22,453	$ 43,470	$ 121,521	$ 81,403
Propane [Member]
Derivative [Line Items]
Derivative, Cash Received on Hedge	22	0	(92)	0
Basis Swap [Member]
Derivative [Line Items]
Derivative, Cash Received on Hedge		1,300		1,343
Derivative, Cost of Hedge Net of Cash Received	10,440		1,771
Unrealized Gain (Loss) on Derivatives and Commodity Contracts	85,234	(3,634)	88,276	(2,827)
Gain (Loss) on Hedging Activity	95,674	(2,334)	90,047	(1,484)
Reclassification out of Accumulated Other Comprehensive Income [Member]
Derivative [Line Items]
Unrealized Gain (Loss) on Derivatives and Commodity Contracts	19,597	32,409	52,759	95,843
Gain (Loss) on Hedging Activity	19,597	32,409	52,759	95,843
Natural Gas Liquids [Member]
Derivative [Line Items]
Unrealized Gain (Loss) on Derivatives and Commodity Contracts	48	0	(744)	0
Gain (Loss) on Hedging Activity	70	0	(836)	0
Revenue Mineral Sales [Member] | Swap [Member] | Cash Flow Hedging [Member] | Natural Gas [Member]
Derivative [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	$ 9,995	$ 60,801	$ 9,995	$ 60,801

Derivative Instruments Asset_Li

Derivative Instruments Asset/Liability Derivative Table (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Commodity Member [Member]
Derivative [Line Items]
Derivative Asset, Current	$ 36,686	$ 234,409
Derivative Liability, Noncurrent	51,829	0
Derivative Asset, Noncurrent	39,124	44,539
Derivative Liability, Current	40,636	5,137
Gas Cash Flow hedges	75,810	278,948
Derivative Liability	92,465	5,137
Basis Swap [Member]
Derivative [Line Items]
Derivative Asset, Current	55,209	5,429
Derivative Liability, Noncurrent	6,909	12,206
Derivative Asset, Noncurrent	36,998	1,093
Derivative Liability, Current	4,275	1,569
Gas Cash Flow hedges	92,207	6,522
Derivative Liability	$ 11,184	$ 13,775

Financial Instruments Measured

Financial Instruments Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
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
Significant Other Observable Inputs (Level 2)
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]
Gas Cash Flow hedges	64,368	266,558
Guarantees, Fair Value Disclosure	0	0
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	$ (1,463)	$ (1,228)

Fair Value of Financial Instr64

Fair Value of Financial Instruments Fair Value Disclosures (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015	Sep. 30, 2015	Dec. 31, 2014
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and Cash Equivalents	$ 80,247	$ 72,574	$ 83,015	$ 176,985
Notes and Loans Payable, Current	354,000	952,000
Long-term Debt	2,731,455	2,705,718	$ 2,508
Portion at Fair Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and Cash Equivalents	80,247	72,574
Long-term Debt	2,563,492	1,808,936
Reported Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and Cash Equivalents	80,247	72,574
Long-term Debt	$ 2,760,483	$ 2,738,735

Industry Segment Results (Detai

Industry Segment Results (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Segment Reporting Information [Line Items]
Total Revenue and Other Income	$ 745,578	$ 720,933	$ 1,564,353	$ 2,027,356
Natural Gas, NGLs and Oil Sales	205,913	157,538	555,101	541,630
Revenue, Net	697,982	634,415	1,436,653	1,861,748
Sales-Outside	473,598	480,709	1,299,512	1,568,226
Gain (Loss) on Hedging Activity	198,192	143,606	53,872	251,073
Sales Revenue, Services, Other	4,714	5,129	20,687	24,596
Revenue from Purchased Oil and Gas	12,086	2,535	28,633	7,649
Freight-Outside	9,392	2,436	33,949	10,204
Segment Reporting - Intersegment Transfers		0	0	0
Income (Loss) from Continuing Operations before Income Taxes, Domestic	115,426	195,180	(286,568)	(646,790)
Total Assets	9,565,494	11,081,274	9,565,494	11,081,274	$ 10,929,902
Depreciation, Depletion and Amortization	151,712	146,844	441,919	427,132
Segment Reporting - Capital Expenditures	64,132	247,778	179,389	864,262
Income (Loss) from Equity Method Investments			41,239	38,838
Duke Energy [Member]
Segment Reporting Information [Line Items]
Total Revenue and Other Income		73,780		183,864
Total Reportable Segments [Member]
Segment Reporting Information [Line Items]
Income (Loss) from Continuing Operations before Income Taxes, Domestic	195,816	182,514	(75,798)	(472,660)
Gas Segment [Member]
Segment Reporting Information [Line Items]
Natural Gas, NGLs and Oil Sales	205,913	157,538	555,101	541,630
Revenue, Net	416,191	303,977	638,030	801,546
Gain (Loss) on Hedging Activity	198,192	143,606	53,872	251,073
Sales Revenue, Services, Other	0	0	0	0
Revenue from Purchased Oil and Gas	12,086	2,535	28,633	7,649
Freight-Outside	0	0	0	0
Segment Reporting - Intersegment Transfers		298	424	1,194
Income (Loss) from Continuing Operations before Income Taxes, Domestic	161,075	50,187	(156,386)	(765,193)
Total Assets	6,537,210	6,843,935	6,537,210	6,843,935
Depreciation, Depletion and Amortization	101,257	92,083	312,122	269,377
Segment Reporting - Capital Expenditures	48,746	209,560	134,967	749,015
Income (Loss) from Equity Method Investments	15,219	13,467	39,980	31,877
Equity Method Investments	253,637	205,987	253,637	205,987
Gas Segment [Member] | Marcellus Shale [Member]
Segment Reporting Information [Line Items]
Natural Gas, NGLs and Oil Sales	107,676	75,003	287,465	282,626
Revenue, Net	131,224	99,042	408,447	337,716
Gain (Loss) on Hedging Activity	23,548	24,039	120,982	55,090
Sales Revenue, Services, Other	0	0	0	0
Revenue from Purchased Oil and Gas	0	0	0	0
Freight-Outside	0	0	0	0
Segment Reporting - Intersegment Transfers		0	0	0
Income (Loss) from Continuing Operations before Income Taxes, Domestic	10,465	(13,975)	43,251	31,674
Gas Segment [Member] | Utica Shale [Member]
Segment Reporting Information [Line Items]
Natural Gas, NGLs and Oil Sales	40,312	20,617	115,610	56,880
Revenue, Net	44,958	21,572	140,284	57,835
Gain (Loss) on Hedging Activity	4,646	955	24,674	955
Sales Revenue, Services, Other	0	0	0	0
Revenue from Purchased Oil and Gas	0	0	0	0
Freight-Outside	0	0	0	0
Segment Reporting - Intersegment Transfers		0	0	0
Income (Loss) from Continuing Operations before Income Taxes, Domestic	4,342	(10,505)	17,521	(21,336)
Gas Segment [Member] | Coalbed Methane [Member]
Segment Reporting Information [Line Items]
Natural Gas, NGLs and Oil Sales	46,917	48,860	122,410	156,827
Revenue, Net	55,114	63,443	166,630	204,716
Gain (Loss) on Hedging Activity	8,197	14,285	43,796	46,695
Sales Revenue, Services, Other	0	0	0	0
Revenue from Purchased Oil and Gas	0	0	0	0
Freight-Outside	0	0	0	0
Segment Reporting - Intersegment Transfers		298	424	1,194
Income (Loss) from Continuing Operations before Income Taxes, Domestic	6,989	11,541	24,813	44,106
Gas Segment [Member] | Other Gas [Member]
Segment Reporting Information [Line Items]
Natural Gas, NGLs and Oil Sales	11,008	13,058	29,616	45,297
Revenue, Net	184,895	119,920	(77,331)	201,279
Gain (Loss) on Hedging Activity	161,801	104,327	(135,580)	148,333
Sales Revenue, Services, Other	0	0	0	0
Revenue from Purchased Oil and Gas	12,086	2,535	28,633	7,649
Freight-Outside	0	0	0	0
Segment Reporting - Intersegment Transfers		0	0	0
Income (Loss) from Continuing Operations before Income Taxes, Domestic	139,279	63,126	(241,971)	(819,637)
PA Operations [Member]
Segment Reporting Information [Line Items]
Revenue, Net	277,077	325,607	778,360	1,036,800
Sales-Outside	267,685	323,171	744,411	1,026,596
Gain (Loss) on Hedging Activity	0	0	0	0
Sales Revenue, Services, Other	0	0	0	0
Revenue from Purchased Oil and Gas	0	0	0	0
Freight-Outside	9,392	2,436	33,949	10,204
Segment Reporting - Intersegment Transfers		0	0	0
Income (Loss) from Continuing Operations before Income Taxes, Domestic	34,741	132,327	80,588	292,533
Total Assets	2,007,767	2,141,700	2,007,767	2,141,700
Depreciation, Depletion and Amortization	42,370	43,459	125,334	136,536
Segment Reporting - Capital Expenditures	12,292	34,978	38,295	102,939
Other Segments [Member]
Segment Reporting Information [Line Items]
Revenue, Net	4,714	5,129	20,687	24,596
Sales-Outside	0	0	0	0
Gain (Loss) on Hedging Activity	0	0	0	0
Sales Revenue, Services, Other	4,714	5,129	20,687	24,596
Revenue from Purchased Oil and Gas	0	0	0	0
Freight-Outside	0	0	0	0
Segment Reporting - Intersegment Transfers		0	0	0
Income (Loss) from Continuing Operations before Income Taxes, Domestic	(80,390)	12,964	(210,346)	(172,936)
Total Assets	1,018,406	1,067,176	1,018,406	1,067,176
Depreciation, Depletion and Amortization	8,085	11,302	4,463	21,219
Segment Reporting - Capital Expenditures	3,094	3,240	6,127	12,308
Income (Loss) from Equity Method Investments	136	2,121	1,259	6,961
Equity Method Investments	3,786	4,105	3,786	4,105
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Revenue, Net	0	(298)	(424)	(1,194)
Sales-Outside	0	0	0	0
Gain (Loss) on Hedging Activity	0	0	0	0
Sales Revenue, Services, Other	0	0	0	0
Revenue from Purchased Oil and Gas	0	0	0	0
Freight-Outside	0	0	0	0
Segment Reporting - Intersegment Transfers		(298)	(424)	(1,194)
Income (Loss) from Continuing Operations before Income Taxes, Domestic	0	(298)	(424)	(1,194)
Total Assets	2,111	1,028,463	2,111	1,028,463
Depreciation, Depletion and Amortization	0	0	0	0
Segment Reporting - Capital Expenditures	$ 0	$ 0	$ 0	$ 0

Reconciliation of Segment Infor

Reconciliation of Segment Information, Revenue and Other Income (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Jun. 30, 2013	Sep. 30, 2016	Sep. 30, 2015
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Sales Revenue, Services, Other	$ 4,714	$ 5,129		$ 20,687	$ 24,596
Revenue, Net	697,982	634,415		1,436,653	1,861,748
Income (Loss) from Continuing Operations before Income Taxes, Domestic	115,426	195,180		(286,568)	(646,790)
Depreciation, Depletion and Amortization	151,712	146,844		441,919	427,132
Segment Reporting - Capital Expenditures	64,132	247,778		179,389	864,262
Related Party Transaction, Expenses from Transactions with Related Party	31,216	27,890		93,209	75,176
Total Revenue and Other Income	745,578	720,933		1,564,353	2,027,356
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	195,816	182,514		(75,798)	(472,660)
Other Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Equity Method Investments	3,786	4,105		3,786	4,105
Sales Revenue, Services, Other	4,714	5,129		20,687	24,596
Revenue, Net	4,714	5,129		20,687	24,596
Income (Loss) from Continuing Operations before Income Taxes, Domestic	(80,390)	12,964		(210,346)	(172,936)
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest	(33,073)	61,522		(65,737)	45,000
Depreciation, Depletion and Amortization	8,085	11,302		4,463	21,219
Segment Reporting - Capital Expenditures	3,094	3,240		6,127	12,308
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	(47,317)	(48,558)		(144,609)	(150,185)
Related Party Transaction, Expenses from Transactions with Related Party	0	(298)		424	(1,194)
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	0	0	$ (67,751)	0
Intersegment Eliminations [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Sales Revenue, Services, Other	0	0		0	0
Revenue, Net	0	(298)		(424)	(1,194)
Income (Loss) from Continuing Operations before Income Taxes, Domestic	0	(298)		(424)	(1,194)
Depreciation, Depletion and Amortization	0	0		0	0
Segment Reporting - Capital Expenditures	0	0		0	0
Gas Segment [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Equity Method Investments	253,637	205,987		253,637	205,987
Sales Revenue, Services, Other	0	0		0	0
Revenue, Net	416,191	303,977		638,030	801,546
Income (Loss) from Continuing Operations before Income Taxes, Domestic	161,075	50,187		(156,386)	(765,193)
Depreciation, Depletion and Amortization	101,257	92,083		312,122	269,377
Segment Reporting - Capital Expenditures	48,746	209,560		134,967	749,015
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		0	0
Revenue, Net	55,114	63,443		166,630	204,716
Income (Loss) from Continuing Operations before Income Taxes, Domestic	6,989	11,541		24,813	44,106
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		0	0
Revenue, Net	44,958	21,572		140,284	57,835
Income (Loss) from Continuing Operations before Income Taxes, Domestic	4,342	(10,505)		17,521	(21,336)
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		0	0
Revenue, Net	184,895	119,920		(77,331)	201,279
Income (Loss) from Continuing Operations before Income Taxes, Domestic	$ 139,279	63,126		$ (241,971)	(819,637)
Duke Energy [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total Revenue and Other Income		$ 73,780			$ 183,864

Reconciliation of Segment Inf67

Reconciliation of Segment Information, Total Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015	Sep. 30, 2015
Assets:
Total Assets	$ 9,565,494	$ 10,929,902	$ 11,081,274
Total Other Assets	635,960	455,762
Items excluded from segment assets:
Recoverable Income Taxes	0	$ 13,887
Operating Segments [Member]
Assets:
Total Assets	8,544,977		8,985,635
Corporate and Other [Member]
Assets:
Total Other Assets	794,917		914,042
Gas Segment [Member]
Assets:
Total Assets	6,537,210		6,843,935
Other Segments [Member]
Assets:
Total Assets	1,018,406		1,067,176
Items excluded from segment assets:
Cash and Other Investments	73,809
Excludes Gas Segment [Member]
Items excluded from segment assets:
Cash and Other Investments			79,887
Intersegment Eliminations [Member]
Assets:
Total Assets	2,111		1,028,463
Items excluded from segment assets:
Cash and Other Investments	0
Recoverable Income Taxes			64,693
Deferred Tax Assets, Net of Valuation Allowance	149,680		8,554
Disposal Group, Including Discontinued Operation, Assets	$ 2,111		$ 1,028,463

Guarantor Subsidiaries Financ68

Guarantor Subsidiaries Financial Information Additional Information (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015	Sep. 30, 2015	Dec. 31, 2014
Condensed Financial Statements, Captions [Line Items]
Cash and Cash Equivalents	$ 80,247	$ 72,574	$ 83,015	$ 176,985
Long-term Debt	2,731,455	2,705,718	2,508
Accounts and Notes Receivable:
Trade	163,955	151,383
Inventories	$ 62,622	66,792
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	$ 1,854,953	1,855,617
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	$ 213
Senior Notes due April 2023 at 8.0% [Member]
Condensed Financial Statements, Captions [Line Items]
Long-term Debt	$ 494,118	$ 493,439
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			9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Mar. 31, 2015	Sep. 30, 2016	Sep. 30, 2015
Schedule of Condensed Consolidating Statement of Operations [Line Items]
Natural Gas, NGLs and Oil Sales	$ 205,913	$ 157,538		$ 555,101	$ 541,630
Unrealized Gain (Loss) on Commodity Derivatives	198,192	143,606		53,872	251,073
Coal Sales	267,685	323,171		744,411	1,026,596
Other Revenue, Net	4,714	5,129		20,687	24,596
Purchased Gas Sales	12,086	2,535		28,633	7,649
Freight-Outside	9,392	2,436		33,949	10,204
Other Income (including equity earnings)	32,393	38,475		114,159	111,279
Gain (Loss) on Sale of Assets	15,203	48,043		13,541	54,329
Total Revenue and Other Income	745,578	720,933		1,564,353	2,027,356
Oil and Gas Property, Lease Operating Expense	22,602	29,452		73,996	96,229
Gas Gathering, Transportation, Marketing and Processing Costs	94,796	89,965		279,753	248,682
Production Tax Expense	9,027	8,475		23,732	24,605
E&P Depreciation, Depletion, and Amortization	101,257	92,083		312,122	269,377
Exploration and Production Costs	384	3,332		5,036	7,695
Production Royalty Interests and Purchased Gas Costs	11,940	1,921		28,692	5,939
Other Expenses	21,760	20,953		65,980	47,088
Impairment of Oil and Gas Properties	0	0		0	828,905
Results of Operations, General and Administrative Related to Oil and Gas Producing Activities	26,198	23,919		74,067	80,396
Oil and Gas Production Expense	287,964	270,100		863,378	1,608,916
Operating Expenses	182,717	137,759		521,277	564,604
Coal Depreciation, Depletion, Amortization	42,370	43,459		125,334	136,536
Freight Expense	9,392	2,436		33,949	10,204
General and Administrative Expense	7,653	9,044		20,207	34,231
Cost of Coal Products and Services	242,132	192,698		700,767	745,575
Other Nonoperating Expense	40,085	(3,078)		127,531	70,554
Other General and Administrative Expense	4,569	6,173		10,173	9,946
Depreciation, Depletion and Amortization, Nonproduction	8,085	11,302		4,463	21,219
Gains (Losses) on Extinguishment of Debt	0	0	$ 17	0	67,751
Interest Expense	47,317	48,558		144,609	150,185
Other General Expense	100,056	62,955		286,776	319,655
Total Costs	630,152	525,753		1,850,921	2,674,146
Income (Loss) from Continuing Operations before Income Taxes, Domestic	115,426	195,180		(286,568)	(646,790)
Income Tax Expense (Benefit)	52,858	65,868		(71,798)	(251,181)
Income (Loss) from Continuing Operations Attributable to Parent	62,568	129,312		(214,770)	(395,609)
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent	(34,975)	(3,842)		(322,747)	(3,192)
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	27,593	125,470		(537,517)	(398,801)
Net Income (Loss) Attributable to Noncontrolling Interest	2,248	6,490		4,541	6,490
Net Income (Loss)	25,345	118,980		(542,058)	(405,291)
Parent Issuer [Member]
Schedule of Condensed Consolidating Statement of Operations [Line Items]
Natural Gas, NGLs and Oil Sales	0	0		0	0
Unrealized Gain (Loss) on Commodity Derivatives	0	0		0	0
Coal Sales	0	0		0	0
Other Revenue, Net	0	0		0	0
Purchased Gas Sales	0	0		0	0
Freight-Outside	0	0		0	0
Other Income (including equity earnings)	56,836	156,955		(441,368)	(246,791)
Gain (Loss) on Sale of Assets	0	0		0	0
Total Revenue and Other Income	56,836	156,955		(441,368)	(246,791)
Oil and Gas Property, Lease Operating Expense	0	0		0	0
Gas Gathering, Transportation, Marketing and Processing Costs	0	0		0	0
Production Tax Expense	0	0		0	0
E&P Depreciation, Depletion, and Amortization	0	0		0	0
Exploration and Production Costs	0	0		0	0
Production Royalty Interests and Purchased Gas Costs	0	0		0	0
Other Expenses	0	0		0	0
Impairment of Oil and Gas Properties					0
Results of Operations, General and Administrative Related to Oil and Gas Producing Activities	0	0		0	0
Oil and Gas Production Expense	0	0		0	0
Operating Expenses	0	0		0	0
Coal Depreciation, Depletion, Amortization	0	0		0	0
Freight Expense	0	0		0	0
General and Administrative Expense	0	0		0	0
Cost of Coal Products and Services	0	0		0	0
Other Nonoperating Expense	7,692	16,543		30,077	43,343
Other General and Administrative Expense	0	0		0	0
Depreciation, Depletion and Amortization, Nonproduction	150	154		452	449
Gains (Losses) on Extinguishment of Debt					67,751
Interest Expense	42,812	44,385		131,431	141,493
Other General Expense	50,654	61,082		161,960	253,036
Total Costs	50,654	61,082		161,960	253,036
Income (Loss) from Continuing Operations before Income Taxes, Domestic	6,182	95,873		(603,328)	(499,827)
Income Tax Expense (Benefit)	(19,163)	(23,107)		(61,270)	(94,536)
Income (Loss) from Continuing Operations Attributable to Parent	25,345	118,980		(542,058)	(405,291)
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent	0	0		0	0
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	25,345	118,980		(542,058)	(405,291)
Net Income (Loss) Attributable to Noncontrolling Interest	0	0		0	0
Net Income (Loss)	25,345	118,980		(542,058)	(405,291)
CNX Gas Guarantor [Member]
Schedule of Condensed Consolidating Statement of Operations [Line Items]
Natural Gas, NGLs and Oil Sales	205,913	157,835		555,526	542,824
Unrealized Gain (Loss) on Commodity Derivatives	198,192	143,606		53,872	251,073
Coal Sales	0	0		0	0
Other Revenue, Net	0	0		0	0
Purchased Gas Sales	12,086	2,535		28,633	7,649
Freight-Outside	0	0		0	0
Other Income (including equity earnings)	18,175	16,122		60,592	43,941
Gain (Loss) on Sale of Assets	15,342	890		10,446	3,076
Total Revenue and Other Income	449,708	320,988		709,069	848,563
Oil and Gas Property, Lease Operating Expense	22,602	29,452		73,996	96,229
Gas Gathering, Transportation, Marketing and Processing Costs	94,796	89,965		279,753	248,682
Production Tax Expense	9,027	8,475		23,732	24,605
E&P Depreciation, Depletion, and Amortization	101,257	92,083		312,122	269,377
Exploration and Production Costs	384	3,332		5,036	7,695
Production Royalty Interests and Purchased Gas Costs	11,940	1,921		28,692	5,939
Other Expenses	21,760	20,953		65,980	47,088
Impairment of Oil and Gas Properties					828,905
Results of Operations, General and Administrative Related to Oil and Gas Producing Activities	26,198	23,919		74,067	80,396
Oil and Gas Production Expense	287,964	270,100		863,378	1,608,916
Operating Expenses	0	0		0	0
Coal Depreciation, Depletion, Amortization	0	0		0	0
Freight Expense	0	0		0	0
General and Administrative Expense	0	0		0	0
Cost of Coal Products and Services	0	0		0	0
Other Nonoperating Expense	0	0		0	0
Other General and Administrative Expense	0	0		0	0
Depreciation, Depletion and Amortization, Nonproduction	0	0		0	0
Gains (Losses) on Extinguishment of Debt					0
Interest Expense	669	701		2,077	4,840
Other General Expense	669	701		2,077	4,840
Total Costs	288,633	270,801		865,455	1,613,756
Income (Loss) from Continuing Operations before Income Taxes, Domestic	161,075	50,187		(156,386)	(765,193)
Income Tax Expense (Benefit)	64,241	19,841		(62,148)	(286,335)
Income (Loss) from Continuing Operations Attributable to Parent	96,834	30,346		(94,238)	(478,858)
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent	0	0		0	0
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	96,834	30,346		(94,238)	(478,858)
Net Income (Loss) Attributable to Noncontrolling Interest	0	0		0	0
Net Income (Loss)	96,834	30,346		(94,238)	(478,858)
Other Guarantors Subsidiaries [Member]
Schedule of Condensed Consolidating Statement of Operations [Line Items]
Natural Gas, NGLs and Oil Sales	0	0		0	0
Unrealized Gain (Loss) on Commodity Derivatives	0	0		0	0
Coal Sales	200,763	242,378		558,308	769,945
Other Revenue, Net	4,714	5,129		20,687	24,596
Purchased Gas Sales	0	0		0	0
Freight-Outside	6,985	2,134		25,476	8,633
Other Income (including equity earnings)	13,737	22,194		51,304	68,130
Gain (Loss) on Sale of Assets	(141)	47,140		3,105	51,208
Total Revenue and Other Income	226,058	318,975		658,880	922,512
Oil and Gas Property, Lease Operating Expense	0	0		0	0
Gas Gathering, Transportation, Marketing and Processing Costs	0	0		0	0
Production Tax Expense	0	0		0	0
E&P Depreciation, Depletion, and Amortization	0	0		0	0
Exploration and Production Costs	0	0		0	0
Production Royalty Interests and Purchased Gas Costs	0	0		0	0
Other Expenses	0	0		0	0
Impairment of Oil and Gas Properties					0
Results of Operations, General and Administrative Related to Oil and Gas Producing Activities	0	0		0	0
Oil and Gas Production Expense	0	0		0	0
Operating Expenses	137,186	90,823		391,211	410,950
Coal Depreciation, Depletion, Amortization	31,778	32,671		94,002	102,479
Freight Expense	6,985	2,134		25,476	8,633
General and Administrative Expense	4,993	6,428		13,649	25,318
Cost of Coal Products and Services	180,942	132,056		524,338	547,380
Other Nonoperating Expense	32,386	(19,665)		97,417	26,715
Other General and Administrative Expense	4,569	6,173		10,173	9,946
Depreciation, Depletion and Amortization, Nonproduction	7,935	11,148		4,011	20,770
Gains (Losses) on Extinguishment of Debt					0
Interest Expense	1,613	1,600		4,824	4,821
Other General Expense	46,503	(744)		116,425	62,252
Total Costs	227,445	131,312		640,763	609,632
Income (Loss) from Continuing Operations before Income Taxes, Domestic	(1,387)	187,663		18,117	312,880
Income Tax Expense (Benefit)	7,783	69,222		51,634	128,357
Income (Loss) from Continuing Operations Attributable to Parent	(9,170)	118,441		(33,517)	184,523
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent	0	0		0	0
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	(9,170)	118,441		(33,517)	184,523
Net Income (Loss) Attributable to Noncontrolling Interest	0	0		0	0
Net Income (Loss)	(9,170)	118,441		(33,517)	184,523
CNX Coal Resources LP [Member]
Schedule of Condensed Consolidating Statement of Operations [Line Items]
Natural Gas, NGLs and Oil Sales	0	0		0	0
Unrealized Gain (Loss) on Commodity Derivatives	0	0		0	0
Coal Sales	66,922	80,793		186,103	256,651
Other Revenue, Net	0	0		0	0
Purchased Gas Sales	0	0		0	0
Freight-Outside	2,407	302		8,473	1,571
Other Income (including equity earnings)	483	330		2,264	768
Gain (Loss) on Sale of Assets	2	13		(10)	45
Total Revenue and Other Income	69,814	81,438		196,830	259,035
Oil and Gas Property, Lease Operating Expense	0	0		0	0
Gas Gathering, Transportation, Marketing and Processing Costs	0	0		0	0
Production Tax Expense	0	0		0	0
E&P Depreciation, Depletion, and Amortization	0	0		0	0
Exploration and Production Costs	0	0		0	0
Production Royalty Interests and Purchased Gas Costs	0	0		0	0
Other Expenses	0	0		0	0
Impairment of Oil and Gas Properties					0
Results of Operations, General and Administrative Related to Oil and Gas Producing Activities	0	0		0	0
Oil and Gas Production Expense	0	0		0	0
Operating Expenses	45,531	46,936		130,066	153,654
Coal Depreciation, Depletion, Amortization	10,592	10,788		31,332	34,057
Freight Expense	2,407	302		8,473	1,571
General and Administrative Expense	2,660	2,616		6,558	8,913
Cost of Coal Products and Services	61,190	60,642		176,429	198,195
Other Nonoperating Expense	0	0		0	0
Other General and Administrative Expense	0	0		0	0
Depreciation, Depletion and Amortization, Nonproduction	0	0		0	0
Gains (Losses) on Extinguishment of Debt					0
Interest Expense	2,223	1,872		6,277	7,758
Other General Expense	2,223	1,872		6,277	7,758
Total Costs	63,413	62,514		182,706	205,953
Income (Loss) from Continuing Operations before Income Taxes, Domestic	6,401	18,924		14,124	53,082
Income Tax Expense (Benefit)	0	0		0	0
Income (Loss) from Continuing Operations Attributable to Parent	6,401	18,924		14,124	53,082
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent	0	0		0	0
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	6,401	18,924		14,124	53,082
Net Income (Loss) Attributable to Noncontrolling Interest	0	0		0	0
Net Income (Loss)	6,401	18,924		14,124	53,082
Non-Guarantors [Member]
Schedule of Condensed Consolidating Statement of Operations [Line Items]
Natural Gas, NGLs and Oil Sales	0	0		0	0
Unrealized Gain (Loss) on Commodity Derivatives	0	0		0	0
Coal Sales	0	0		0	0
Other Revenue, Net	0	0		0	0
Purchased Gas Sales	0	0		0	0
Freight-Outside	0	0		0	0
Other Income (including equity earnings)	0	(171)		0	4,105
Gain (Loss) on Sale of Assets	0	0		0	0
Total Revenue and Other Income	0	(171)		0	4,105
Oil and Gas Property, Lease Operating Expense	0	0		0	0
Gas Gathering, Transportation, Marketing and Processing Costs	0	0		0	0
Production Tax Expense	0	0		0	0
E&P Depreciation, Depletion, and Amortization	0	0		0	0
Exploration and Production Costs	0	15		0	9
Production Royalty Interests and Purchased Gas Costs	0	0		0	0
Other Expenses	0	0		0	0
Impairment of Oil and Gas Properties					0
Results of Operations, General and Administrative Related to Oil and Gas Producing Activities	0	0		0	0
Oil and Gas Production Expense	0	15		0	9
Operating Expenses	0	0		0	0
Coal Depreciation, Depletion, Amortization	0	0		0	0
Freight Expense	0	0		0	0
General and Administrative Expense	0	0		0	0
Cost of Coal Products and Services	0	0		0	0
Other Nonoperating Expense	7	44		37	496
Other General and Administrative Expense	0	0		0	0
Depreciation, Depletion and Amortization, Nonproduction	0	0		0	0
Gains (Losses) on Extinguishment of Debt					0
Interest Expense	0	0		0	76
Other General Expense	7	44		37	572
Total Costs	7	59		37	581
Income (Loss) from Continuing Operations before Income Taxes, Domestic	(7)	(230)		(37)	3,524
Income Tax Expense (Benefit)	(3)	(88)		(14)	1,333
Income (Loss) from Continuing Operations Attributable to Parent	(4)	(142)		(23)	2,191
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent	(34,975)	(3,842)		(322,747)	(3,192)
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	(34,979)	(3,984)		(322,770)	(1,001)
Net Income (Loss) Attributable to Noncontrolling Interest	0	0		0	0
Net Income (Loss)	(34,979)	(3,984)		(322,770)	(1,001)
Consolidation, Eliminations [Member]
Schedule of Condensed Consolidating Statement of Operations [Line Items]
Natural Gas, NGLs and Oil Sales	0	(297)		(425)	(1,194)
Unrealized Gain (Loss) on Commodity Derivatives	0	0		0	0
Coal Sales	0	0		0	0
Other Revenue, Net	0	0		0	0
Purchased Gas Sales	0	0		0	0
Freight-Outside	0	0		0	0
Other Income (including equity earnings)	(56,838)	(156,955)		441,367	241,126
Gain (Loss) on Sale of Assets	0	0		0	0
Total Revenue and Other Income	(56,838)	(157,252)		440,942	239,932
Oil and Gas Property, Lease Operating Expense	0	0		0	0
Gas Gathering, Transportation, Marketing and Processing Costs	0	0		0	0
Production Tax Expense	0	0		0	0
E&P Depreciation, Depletion, and Amortization	0	0		0	0
Exploration and Production Costs	0	(15)		0	(9)
Production Royalty Interests and Purchased Gas Costs	0	0		0	0
Other Expenses	0	0		0	0
Impairment of Oil and Gas Properties					0
Results of Operations, General and Administrative Related to Oil and Gas Producing Activities	0	0		0	0
Oil and Gas Production Expense	0	(15)		0	(9)
Operating Expenses	0	0		0	0
Coal Depreciation, Depletion, Amortization	0	0		0	0
Freight Expense	0	0		0	0
General and Administrative Expense	0	0		0	0
Cost of Coal Products and Services	0	0		0	0
Other Nonoperating Expense	0	0		0	0
Other General and Administrative Expense	0	0		0	0
Depreciation, Depletion and Amortization, Nonproduction	0	0		0	0
Gains (Losses) on Extinguishment of Debt					0
Interest Expense	0	0		0	(8,803)
Other General Expense	0	0		0	(8,803)
Total Costs	0	(15)		0	(8,812)
Income (Loss) from Continuing Operations before Income Taxes, Domestic	(56,838)	(157,237)		440,942	248,744
Income Tax Expense (Benefit)	0	0		0	0
Income (Loss) from Continuing Operations Attributable to Parent	(56,838)	(157,237)		440,942	248,744
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent	0	0		0	0
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	(56,838)	(157,237)		440,942	248,744
Net Income (Loss) Attributable to Noncontrolling Interest	2,248	6,490		4,541	6,490
Net Income (Loss)	$ (59,086)	$ (163,727)		$ 436,401	$ 242,254

Guarantor Subsidiaries Balance

Guarantor Subsidiaries Balance Sheet (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015	Sep. 30, 2015	Dec. 31, 2014
Current Assets:
Cash and Cash Equivalents	$ 80,247	$ 72,574	$ 83,015	$ 176,985
Accounts and Notes Receivable:
Other Receivables, Net, Current	80,490	121,735
Trade	163,955	151,383
Inventories	62,622	66,792
Recoverable Income Taxes	0	13,887
Prepaid Expenses	125,490	297,287
Disposal Group, Including Discontinued Operation, Assets, Current	2,111	81,106
Total Current Assets	514,915	804,764
Property, Plant and Equipment:
Property, Plant and Equipment	13,920,715	13,794,907
Less-Accumulated Depreciation, Depletion and Amortization	5,506,096	5,062,201
Disposal Group, Including Discontinued Operation, Property, Plant and Equipment	0	936,670
Total Property, Plant and Equipment-Net	8,414,619	9,669,376
Other Assets:
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	257,423	237,330
Other	228,857	214,388
Disposal Group, Including Discontinued Operation, Other Assets, Noncurrent	0	4,044
Deferred Income Taxes	149,680	0
Total Other Assets	635,960	455,762
Total Assets	9,565,494	10,929,902	$ 11,081,274
Current Liabilities:
Accounts Payable	197,479	250,609
Accounts Payable (Recoverable)- Related Parties	0	0
Current Portion of Long-Term Debt	4,470	4,988
Notes and Loans Payable, Current	354,000	952,000
Accrued Income Taxes, Current	5,485	0
Other Accrued Liabilities	508,144	421,827
Disposal Group, Including Discontinued Operation, Liabilities, Current	664	51,514
Total Current Liabilities	1,070,242	1,680,938
Long-Term Debt:	2,763,809	2,748,205
Deferred Credits and Other Liabilities
Deferred Tax Liabilities, Net, Noncurrent	0	74,629
Postretirement Benefits Other Than Pensions	613,233	630,892
Pneumoconiosis	117,586	111,903
Mine Closing	216,232	227,339
Gas Well Closing	164,115	163,842
Workers' Compensation	68,587	69,812
Salary Retirement	89,305	91,596
Reclamation	0	25
Other Liabilities, Noncurrent	172,218	166,957
Disposal Group, Including Discontinued Operation, Other Liabilities	0	107,988
Total Deferred Credits and Other Liabilities	1,441,276	1,644,983
Total CONSOL Energy Inc. Stockholders' Equity	4,147,215	4,702,027
Stockholders' Equity Attributable to Noncontrolling Interest	142,952	153,749
TOTAL LIABILITIES AND EQUITY	9,565,494	10,929,902
Consolidation, Eliminations [Member]
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
Prepaid Expenses	0	0
Disposal Group, Including Discontinued Operation, Assets, Current	0	0
Total Current Assets	0	0
Property, Plant and Equipment:
Property, Plant and Equipment	0	0
Less-Accumulated Depreciation, Depletion and Amortization	0	0
Disposal Group, Including Discontinued Operation, Property, Plant and Equipment		0
Total Property, Plant and Equipment-Net	0	0
Other Assets:
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	(10,625,572)	(10,567,751)
Other	0	0
Disposal Group, Including Discontinued Operation, Other Assets, Noncurrent		0
Deferred Income Taxes	0
Total Other Assets	(10,625,572)	(10,567,751)
Total Assets	(10,625,572)	(10,567,751)
Current Liabilities:
Accounts Payable	10,169	13,817
Accounts Payable (Recoverable)- Related Parties	(10,169)	(13,817)
Current Portion of Long-Term Debt	0	0
Notes and Loans Payable, Current	0	0
Accrued Income Taxes, Current	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
Deferred Tax Liabilities, Net, Noncurrent		0
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
Reclamation		0
Other Liabilities, Noncurrent	0	0
Disposal Group, Including Discontinued Operation, Other Liabilities		0
Total Deferred Credits and Other Liabilities	0	0
Total CONSOL Energy Inc. Stockholders' Equity	(10,768,524)	(10,721,500)
Stockholders' Equity Attributable to Noncontrolling Interest	142,952	153,749
TOTAL LIABILITIES AND EQUITY	(10,625,572)	(10,567,751)
Parent Issuer [Member]
Current Assets:
Cash and Cash Equivalents	72,879	64,995
Accounts and Notes Receivable:
Other Receivables, Net, Current	30,046	18,933
Trade	0	0
Inventories	0	0
Recoverable Income Taxes		72,913
Prepaid Expenses	10,232	27,245
Disposal Group, Including Discontinued Operation, Assets, Current	0	0
Total Current Assets	113,157	184,086
Property, Plant and Equipment:
Property, Plant and Equipment	139,302	156,348
Less-Accumulated Depreciation, Depletion and Amortization	104,680	111,367
Disposal Group, Including Discontinued Operation, Property, Plant and Equipment		0
Total Property, Plant and Equipment-Net	34,622	44,981
Other Assets:
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	10,608,821	10,563,985
Other	23,021	53,529
Disposal Group, Including Discontinued Operation, Other Assets, Noncurrent		0
Deferred Income Taxes	265,425
Total Other Assets	10,897,267	10,617,514
Total Assets	11,045,046	10,846,581
Current Liabilities:
Accounts Payable	29,313	32,245
Accounts Payable (Recoverable)- Related Parties	3,945,832	2,650,732
Current Portion of Long-Term Debt	(2,810)	(2,777)
Notes and Loans Payable, Current	354,000	952,000
Accrued Income Taxes, Current	(53,541)
Other Accrued Liabilities	95,891	63,668
Disposal Group, Including Discontinued Operation, Liabilities, Current	0	0
Total Current Liabilities	4,368,685	3,695,868
Long-Term Debt:	2,425,071	2,423,247
Deferred Credits and Other Liabilities
Deferred Tax Liabilities, Net, Noncurrent		(122,547)
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	89,305	91,596
Reclamation		0
Other Liabilities, Noncurrent	14,770	56,390
Disposal Group, Including Discontinued Operation, Other Liabilities		0
Total Deferred Credits and Other Liabilities	104,075	25,439
Total CONSOL Energy Inc. Stockholders' Equity	4,147,215	4,702,027
Stockholders' Equity Attributable to Noncontrolling Interest	0	0
TOTAL LIABILITIES AND EQUITY	11,045,046	10,846,581
CNX Gas Guarantor [Member]
Current Assets:
Cash and Cash Equivalents	94	75
Accounts and Notes Receivable:
Other Receivables, Net, Current	46,204	99,001
Trade	79,276	72,664
Inventories	12,088	13,815
Recoverable Income Taxes		(59,026)
Prepaid Expenses	94,009	244,680
Disposal Group, Including Discontinued Operation, Assets, Current	0	0
Total Current Assets	231,671	371,209
Property, Plant and Equipment:
Property, Plant and Equipment	8,975,592	8,875,027
Less-Accumulated Depreciation, Depletion and Amortization	3,002,288	2,695,674
Disposal Group, Including Discontinued Operation, Property, Plant and Equipment		0
Total Property, Plant and Equipment-Net	5,973,304	6,179,353
Other Assets:
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	253,637	234,803
Other	78,598	47,892
Disposal Group, Including Discontinued Operation, Other Assets, Noncurrent		0
Deferred Income Taxes	(115,745)
Total Other Assets	216,490	282,695
Total Assets	6,421,465	6,833,257
Current Liabilities:
Accounts Payable	85,841	149,930
Accounts Payable (Recoverable)- Related Parties	1,367,030	1,521,442
Current Portion of Long-Term Debt	6,288	6,798
Notes and Loans Payable, Current	0	0
Accrued Income Taxes, Current	59,026
Other Accrued Liabilities	147,961	102,753
Disposal Group, Including Discontinued Operation, Liabilities, Current	0	0
Total Current Liabilities	1,666,146	1,780,923
Long-Term Debt:	28,473	33,141
Deferred Credits and Other Liabilities
Deferred Tax Liabilities, Net, Noncurrent		197,176
Postretirement Benefits Other Than Pensions	0	0
Pneumoconiosis	0	0
Mine Closing	0	0
Gas Well Closing	134,258	135,174
Workers' Compensation	0	0
Salary Retirement	0	0
Reclamation		0
Other Liabilities, Noncurrent	139,046	105,588
Disposal Group, Including Discontinued Operation, Other Liabilities		0
Total Deferred Credits and Other Liabilities	273,304	437,938
Total CONSOL Energy Inc. Stockholders' Equity	4,453,542	4,581,255
Stockholders' Equity Attributable to Noncontrolling Interest	0	0
TOTAL LIABILITIES AND EQUITY	6,421,465	6,833,257
Other Guarantors Subsidiaries [Member]
Current Assets:
Cash and Cash Equivalents	0	0
Accounts and Notes Receivable:
Other Receivables, Net, Current	4,040	3,330
Trade	63,678	59,321
Inventories	38,954	40,739
Recoverable Income Taxes		0
Prepaid Expenses	16,510	20,273
Disposal Group, Including Discontinued Operation, Assets, Current	0	0
Total Current Assets	123,182	123,663
Property, Plant and Equipment:
Property, Plant and Equipment	3,932,054	3,898,005
Less-Accumulated Depreciation, Depletion and Amortization	1,967,022	1,854,249
Disposal Group, Including Discontinued Operation, Property, Plant and Equipment		0
Total Property, Plant and Equipment-Net	1,965,032	2,043,756
Other Assets:
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	20,537	6,293
Other	105,936	95,369
Disposal Group, Including Discontinued Operation, Other Assets, Noncurrent		0
Deferred Income Taxes	0
Total Other Assets	126,473	101,662
Total Assets	2,214,687	2,269,081
Current Liabilities:
Accounts Payable	54,061	37,212
Accounts Payable (Recoverable)- Related Parties	(5,094,587)	(3,953,215)
Current Portion of Long-Term Debt	902	906
Notes and Loans Payable, Current	0	0
Accrued Income Taxes, Current	0
Other Accrued Liabilities	223,196	218,186
Disposal Group, Including Discontinued Operation, Liabilities, Current	0	0
Total Current Liabilities	(4,816,428)	(3,696,911)
Long-Term Debt:	105,480	105,746
Deferred Credits and Other Liabilities
Deferred Tax Liabilities, Net, Noncurrent		0
Postretirement Benefits Other Than Pensions	613,233	630,892
Pneumoconiosis	115,049	109,969
Mine Closing	207,062	218,936
Gas Well Closing	29,756	28,572
Workers' Compensation	65,454	66,883
Salary Retirement	0	0
Reclamation		25
Other Liabilities, Noncurrent	17,754	4,266
Disposal Group, Including Discontinued Operation, Other Liabilities		0
Total Deferred Credits and Other Liabilities	1,048,308	1,059,543
Total CONSOL Energy Inc. Stockholders' Equity	5,877,327	4,800,703
Stockholders' Equity Attributable to Noncontrolling Interest	0	0
TOTAL LIABILITIES AND EQUITY	2,214,687	2,269,081
CNX Coal Resources LP [Member]
Current Assets:
Cash and Cash Equivalents	6,314	6,534
Accounts and Notes Receivable:
Other Receivables, Net, Current	200	471
Trade	21,001	19,398
Inventories	11,580	12,238
Recoverable Income Taxes		0
Prepaid Expenses	4,739	5,089
Disposal Group, Including Discontinued Operation, Assets, Current	0	0
Total Current Assets	43,834	43,730
Property, Plant and Equipment:
Property, Plant and Equipment	873,767	865,527
Less-Accumulated Depreciation, Depletion and Amortization	432,106	400,911
Disposal Group, Including Discontinued Operation, Property, Plant and Equipment		0
Total Property, Plant and Equipment-Net	441,661	464,616
Other Assets:
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	0	0
Other	21,302	17,598
Disposal Group, Including Discontinued Operation, Other Assets, Noncurrent		0
Deferred Income Taxes	0
Total Other Assets	21,302	17,598
Total Assets	506,797	525,944
Current Liabilities:
Accounts Payable	18,095	17,405
Accounts Payable (Recoverable)- Related Parties	1,320	4,310
Current Portion of Long-Term Debt	90	61
Notes and Loans Payable, Current	0	0
Accrued Income Taxes, Current	0
Other Accrued Liabilities	41,096	37,220
Disposal Group, Including Discontinued Operation, Liabilities, Current	0	0
Total Current Liabilities	60,601	58,996
Long-Term Debt:	204,785	181,070
Deferred Credits and Other Liabilities
Deferred Tax Liabilities, Net, Noncurrent		0
Postretirement Benefits Other Than Pensions	0	0
Pneumoconiosis	2,537	1,934
Mine Closing	9,170	8,403
Gas Well Closing	101	96
Workers' Compensation	3,133	2,929
Salary Retirement	0	0
Reclamation		0
Other Liabilities, Noncurrent	648	713
Disposal Group, Including Discontinued Operation, Other Liabilities		0
Total Deferred Credits and Other Liabilities	15,589	14,075
Total CONSOL Energy Inc. Stockholders' Equity	225,822	271,803
Stockholders' Equity Attributable to Noncontrolling Interest	0	0
TOTAL LIABILITIES AND EQUITY	506,797	525,944
Non-Guarantors [Member]
Current Assets:
Cash and Cash Equivalents	960	970
Accounts and Notes Receivable:
Other Receivables, Net, Current	0	0
Trade	0	0
Inventories	0	0
Recoverable Income Taxes		0
Prepaid Expenses	0	0
Disposal Group, Including Discontinued Operation, Assets, Current	2,111	81,106
Total Current Assets	3,071	82,076
Property, Plant and Equipment:
Property, Plant and Equipment	0	0
Less-Accumulated Depreciation, Depletion and Amortization	0	0
Disposal Group, Including Discontinued Operation, Property, Plant and Equipment		936,670
Total Property, Plant and Equipment-Net	0	936,670
Other Assets:
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	0	0
Other	0	0
Disposal Group, Including Discontinued Operation, Other Assets, Noncurrent		4,044
Deferred Income Taxes	0
Total Other Assets	0	4,044
Total Assets	3,071	1,022,790
Current Liabilities:
Accounts Payable	0	0
Accounts Payable (Recoverable)- Related Parties	(209,426)	(209,452)
Current Portion of Long-Term Debt	0	0
Notes and Loans Payable, Current	0	0
Accrued Income Taxes, Current	0
Other Accrued Liabilities	0	0
Disposal Group, Including Discontinued Operation, Liabilities, Current	664	51,514
Total Current Liabilities	(208,762)	(157,938)
Long-Term Debt:	0	5,001
Deferred Credits and Other Liabilities
Deferred Tax Liabilities, Net, Noncurrent		0
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
Reclamation		0
Other Liabilities, Noncurrent	0	0
Disposal Group, Including Discontinued Operation, Other Liabilities		107,988
Total Deferred Credits and Other Liabilities	0	107,988
Total CONSOL Energy Inc. Stockholders' Equity	211,833	1,067,739
Stockholders' Equity Attributable to Noncontrolling Interest	0	0
TOTAL LIABILITIES AND EQUITY	$ 3,071	$ 1,022,790

Guarantor Subsidiaries, Condens

Guarantor Subsidiaries, Condensed Statement of Cash Flows (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Schedule of Condensed Consolidating Statement of Cash Flows [Line Items]
Net Cash Provided by (Used in) Operating Activities, Continuing Operations		$ 372,211	$ 393,515
Cash Provided by (Used in) Operating Activities, Discontinued Operations		14,427	10,768
Net Cash Provided by Operating Activities		386,638	404,283
Investing Activities:
Capital Expenditures		(179,389)	(864,262)
Proceeds from Sale of Productive Assets		38,977	83,044
Payments for (Proceeds from) Businesses and Interest in Affiliates		(4,555)	(70,224)
Payments for Advance to Affiliate		0	0
Net Cash Provided by (Used in) Investing Activities, Continuing Operations		(144,967)	(851,442)
Cash Provided by (Used in) Investing Activities, Discontinued Operations		366,251	(30,894)
Net Cash Provided by (Used in) Investing Activities		221,284	(882,336)
Financing Activities:
Repayments of Other Debt		(6,222)	(1,523)
Payments of Merger Related Costs, Financing Activities		0	0
(Payments on) Proceeds from Short-Term Borrowings		(598,000)	945,000
Tax Benefit from Stock-Based Compensation		0	208
Proceeds from Sale of Treasury Stock			(71,674)
Payments of Dividends		(2,294)	(30,991)
Proceeds from Issuance of Long-Term Notes		0	492,760
Noncontrolling Interest, Period Increase (Decrease)		(16,241)	0
Payments On Long Term Notes Including Redemption Premium		0	(1,263,719)
Proceeds from Issuance of Common Stock		4	8,288
Proceeds from Sale of Interest in Partnership Unit		0	148,359
Net Proceeds from Revolver - MLP		23,000	180,000
Payments for Repurchase of Initial Public Offering			0
Payments of Debt Issuance Costs		(482)	(22,586)
Net Cash Provided by (Used in) Financing Activities, Continuing Operations		(600,235)	384,122
Cash Provided by (Used in) Financing Activities, Discontinued Operations	$ (39)	(14)	(39)
Net Cash (Used in) Provided by Financing Activities	384,083	(600,249)	384,083
Parent Issuer [Member]
Schedule of Condensed Consolidating Statement of Cash Flows [Line Items]
Net Cash Provided by (Used in) Operating Activities, Continuing Operations		611,844	(130,726)
Cash Provided by (Used in) Operating Activities, Discontinued Operations		0	0
Net Cash Provided by Operating Activities		611,844	(130,726)
Investing Activities:
Capital Expenditures		(2,450)	(8,607)
Proceeds from Sale of Productive Assets		0	47
Payments for (Proceeds from) Businesses and Interest in Affiliates		0	0
Payments for Advance to Affiliate		0	0
Net Cash Provided by (Used in) Investing Activities, Continuing Operations		(2,450)	(8,560)
Cash Provided by (Used in) Investing Activities, Discontinued Operations		0	0
Net Cash Provided by (Used in) Investing Activities		(2,450)	(8,560)
Financing Activities:
Repayments of Other Debt		(1,220)	(6,853)
Payments of Merger Related Costs, Financing Activities		0	0
(Payments on) Proceeds from Short-Term Borrowings		(598,000)	945,000
Tax Benefit from Stock-Based Compensation			208
Proceeds from Sale of Treasury Stock			(71,674)
Payments of Dividends		(2,294)	(30,991)
Proceeds from Issuance of Long-Term Notes			492,760
Noncontrolling Interest, Period Increase (Decrease)		0
Payments On Long Term Notes Including Redemption Premium			(1,263,719)
Proceeds from Issuance of Common Stock		4	8,288
Proceeds from Sale of Interest in Partnership Unit			0
Net Proceeds from Revolver - MLP		0	0
Payments for Repurchase of Initial Public Offering			0
Payments of Debt Issuance Costs		0	0
Net Cash Provided by (Used in) Financing Activities, Continuing Operations		(601,510)	73,019
Cash Provided by (Used in) Financing Activities, Discontinued Operations	0	0
Net Cash (Used in) Provided by Financing Activities	73,019	(601,510)
CNX Gas Guarantor [Member]
Schedule of Condensed Consolidating Statement of Cash Flows [Line Items]
Net Cash Provided by (Used in) Operating Activities, Continuing Operations		106,017	712,504
Cash Provided by (Used in) Operating Activities, Discontinued Operations		0	0
Net Cash Provided by Operating Activities		106,017	712,504
Investing Activities:
Capital Expenditures		(134,967)	(749,015)
Proceeds from Sale of Productive Assets		33,041	3,600
Payments for (Proceeds from) Businesses and Interest in Affiliates		518	(62,860)
Payments for Advance to Affiliate		0	0
Net Cash Provided by (Used in) Investing Activities, Continuing Operations		(101,408)	(808,275)
Cash Provided by (Used in) Investing Activities, Discontinued Operations		0	0
Net Cash Provided by (Used in) Investing Activities		(101,408)	(808,275)
Financing Activities:
Repayments of Other Debt		(4,590)	(4,823)
Payments of Merger Related Costs, Financing Activities		0	0
(Payments on) Proceeds from Short-Term Borrowings		0	70,000
Tax Benefit from Stock-Based Compensation			0
Proceeds from Sale of Treasury Stock			0
Payments of Dividends		0	0
Proceeds from Issuance of Long-Term Notes			0
Noncontrolling Interest, Period Increase (Decrease)		0
Payments On Long Term Notes Including Redemption Premium			0
Proceeds from Issuance of Common Stock		0	0
Proceeds from Sale of Interest in Partnership Unit			0
Net Proceeds from Revolver - MLP		0	0
Payments for Repurchase of Initial Public Offering			0
Payments of Debt Issuance Costs		0	0
Net Cash Provided by (Used in) Financing Activities, Continuing Operations		(4,590)	65,177
Cash Provided by (Used in) Financing Activities, Discontinued Operations		0	0
Net Cash (Used in) Provided by Financing Activities		(4,590)	65,177
Other Guarantors Subsidiaries [Member]
Schedule of Condensed Consolidating Statement of Cash Flows [Line Items]
Net Cash Provided by (Used in) Operating Activities, Continuing Operations		32,398	(329,261)
Cash Provided by (Used in) Operating Activities, Discontinued Operations		0	0
Net Cash Provided by Operating Activities		32,398	(329,261)
Investing Activities:
Capital Expenditures		(32,403)	(80,928)
Proceeds from Sale of Productive Assets		5,915	79,327
Payments for (Proceeds from) Businesses and Interest in Affiliates		(5,073)	(7,364)
Payments for Advance to Affiliate		0	0
Net Cash Provided by (Used in) Investing Activities, Continuing Operations		(31,561)	(8,965)
Cash Provided by (Used in) Investing Activities, Discontinued Operations		0	0
Net Cash Provided by (Used in) Investing Activities		(31,561)	(8,965)
Financing Activities:
Repayments of Other Debt		(355)	4,148
Payments of Merger Related Costs, Financing Activities		0	0
(Payments on) Proceeds from Short-Term Borrowings		0	0
Tax Benefit from Stock-Based Compensation			0
Proceeds from Sale of Treasury Stock			0
Payments of Dividends		0	0
Proceeds from Issuance of Long-Term Notes			0
Noncontrolling Interest, Period Increase (Decrease)		0
Payments On Long Term Notes Including Redemption Premium			0
Proceeds from Issuance of Common Stock		0	0
Proceeds from Sale of Interest in Partnership Unit			148,359
Net Proceeds from Revolver - MLP		0	200,000
Payments for Repurchase of Initial Public Offering			0
Payments of Debt Issuance Costs		(482)	(14,281)
Net Cash Provided by (Used in) Financing Activities, Continuing Operations		(837)	338,226
Cash Provided by (Used in) Financing Activities, Discontinued Operations	0	0
Net Cash (Used in) Provided by Financing Activities	338,226	(837)
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		47,324	47,465
Cash Provided by (Used in) Operating Activities, Discontinued Operations		0	0
Net Cash Provided by Operating Activities		47,324	47,465
Investing Activities:
Capital Expenditures		(9,569)	(25,712)
Proceeds from Sale of Productive Assets		21	70
Payments for (Proceeds from) Businesses and Interest in Affiliates		0	0
Payments for Advance to Affiliate		21,500
Net Cash Provided by (Used in) Investing Activities, Continuing Operations		(31,048)	(25,642)
Cash Provided by (Used in) Investing Activities, Discontinued Operations		0	0
Net Cash Provided by (Used in) Investing Activities		(31,048)	(25,642)
Financing Activities:
Repayments of Other Debt		(57)	6,005
Payments of Merger Related Costs, Financing Activities		(8,953)	(355)
(Payments on) Proceeds from Short-Term Borrowings		0	0
Tax Benefit from Stock-Based Compensation			0
Proceeds from Sale of Treasury Stock			0
Payments of Dividends		0	0
Proceeds from Issuance of Long-Term Notes			0
Noncontrolling Interest, Period Increase (Decrease)		(30,486)
Proceeds from Collection of Advance to Affiliate			5,789
Payments On Long Term Notes Including Redemption Premium			0
Proceeds from Issuance of Common Stock		0	0
Proceeds from Sale of Interest in Partnership Unit			148,359
Net Proceeds from Revolver - MLP		23,000	180,000
Payments for Repurchase of Initial Public Offering			(342,711)
Payments of Debt Issuance Costs		0	(4,329)
Net Cash Provided by (Used in) Financing Activities, Continuing Operations		(16,496)	18,820
Cash Provided by (Used in) Financing Activities, Discontinued Operations		0	0
Net Cash (Used in) Provided by Financing Activities		(16,496)	(18,820)
Non-Guarantors [Member]
Schedule of Condensed Consolidating Statement of Cash Flows [Line Items]
Net Cash Provided by (Used in) Operating Activities, Continuing Operations		(380,674)	20,053
Cash Provided by (Used in) Operating Activities, Discontinued Operations		14,427	10,768
Net Cash Provided by Operating Activities		(366,247)	30,821
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	0
Net Cash Provided by (Used in) Investing Activities, Continuing Operations		0	0
Cash Provided by (Used in) Investing Activities, Discontinued Operations		366,251	(30,894)
Net Cash Provided by (Used in) Investing Activities		366,251	(30,894)
Financing Activities:
Repayments of Other Debt		0	0
Payments of Merger Related Costs, Financing Activities		0	0
(Payments on) Proceeds from Short-Term Borrowings		0	0
Tax Benefit from Stock-Based Compensation			0
Proceeds from Sale of Treasury Stock			0
Payments of Dividends		0	0
Proceeds from Issuance of Long-Term Notes			0
Noncontrolling Interest, Period Increase (Decrease)		0
Payments On Long Term Notes Including Redemption Premium			0
Proceeds from Issuance of Common Stock		0	0
Proceeds from Sale of Interest in Partnership Unit			0
Net Proceeds from Revolver - MLP		0	0
Payments for Repurchase of Initial Public Offering			0
Payments of Debt Issuance Costs		0	0
Net Cash Provided by (Used in) Financing Activities, Continuing Operations		0	0
Cash Provided by (Used in) Financing Activities, Discontinued Operations	(39)	(14)
Net Cash (Used in) Provided by Financing Activities	(39)	(14)
Consolidation, Eliminations [Member]
Schedule of Condensed Consolidating Statement of Cash Flows [Line Items]
Net Cash Provided by (Used in) Operating Activities, Continuing Operations		(44,698)	73,480
Cash Provided by (Used in) Operating Activities, Discontinued Operations		0	0
Net Cash Provided by Operating Activities		(44,698)	73,480
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		(21,500)
Net Cash Provided by (Used in) Investing Activities, Continuing Operations		21,500	0
Cash Provided by (Used in) Investing Activities, Discontinued Operations		0	0
Net Cash Provided by (Used in) Investing Activities		21,500	0
Financing Activities:
Repayments of Other Debt		0	0
Payments of Merger Related Costs, Financing Activities		8,953	355
(Payments on) Proceeds from Short-Term Borrowings		0	(70,000)
Tax Benefit from Stock-Based Compensation			0
Proceeds from Sale of Treasury Stock			0
Payments of Dividends		0	0
Proceeds from Issuance of Long-Term Notes			0
Noncontrolling Interest, Period Increase (Decrease)		14,245
Proceeds from Collection of Advance to Affiliate			5,789
Payments On Long Term Notes Including Redemption Premium			0
Proceeds from Issuance of Common Stock		0	0
Proceeds from Sale of Interest in Partnership Unit			(148,359)
Net Proceeds from Revolver - MLP		0	(200,000)
Payments for Repurchase of Initial Public Offering			342,711
Payments of Debt Issuance Costs		0	(3,976)
Net Cash Provided by (Used in) Financing Activities, Continuing Operations		23,198	$ (73,480)
Cash Provided by (Used in) Financing Activities, Discontinued Operations	0	0
Net Cash (Used in) Provided by Financing Activities	$ (73,480)	$ 23,198

Guarantor Subsidiaries Financ72

Guarantor Subsidiaries Financial Information Gurantor Subsidiaries Statement of Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Net Income (Loss) Attributable to Parent [Abstract]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$ 27,593	$ 125,470	$ (537,517)	$ (398,801)
Net Income (Loss) Attributable to Noncontrolling Interest	2,248	6,490	4,541	6,490
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	1,305	(49,353)	6,866	(40,036)
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	(12,458)	(20,602)	(33,475)	(60,720)
Other Comprehensive Income (Loss), Net of Tax	(11,153)	(69,955)	(26,609)	(100,756)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	16,440	55,515	(564,126)	(499,557)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	14,192	49,025	(568,667)	(506,047)
Parent Issuer [Member]
Net Income (Loss) Attributable to Parent [Abstract]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	25,345	118,980	(542,058)	(405,291)
Net Income (Loss) Attributable to Noncontrolling Interest	0	0	0	0
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	1,305	(49,353)	6,866	(40,036)
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	(12,458)	(20,602)	(33,475)	(60,720)
Other Comprehensive Income (Loss), Net of Tax	(11,153)	(69,955)	(26,609)	(100,756)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	14,192	49,025	(568,667)	(506,047)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	14,192	49,025	(568,667)	(506,047)
CNX Gas Guarantor [Member]
Net Income (Loss) Attributable to Parent [Abstract]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	96,834	30,346	(94,238)	(478,858)
Net Income (Loss) Attributable to Noncontrolling Interest	0	0	0	0
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	0	0
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	(12,458)	(20,602)	(33,475)	(60,720)
Other Comprehensive Income (Loss), Net of Tax	(12,458)	(20,602)	(33,475)	(60,720)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	84,376	9,744	(127,713)	(539,578)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	84,376	9,744	(127,713)	(539,578)
Other Guarantors Subsidiaries [Member]
Net Income (Loss) Attributable to Parent [Abstract]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	(9,170)	118,441	(33,517)	184,523
Net Income (Loss) Attributable to Noncontrolling Interest	0	0	0	0
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	1,327	(49,337)	6,936	(38,284)
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	0	0	0	0
Other Comprehensive Income (Loss), Net of Tax	1,327	(49,337)	6,936	(38,284)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	(7,843)	69,104	(26,581)	146,239
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	(7,843)	69,104	(26,581)	146,239
CNX Coal Resources LP [Member]
Net Income (Loss) Attributable to Parent [Abstract]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	6,401	18,924	14,124	53,082
Net Income (Loss) Attributable to Noncontrolling Interest	0	0	0	0
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	(22)	(16)	(70)	(1,752)
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	0	0	0	0
Other Comprehensive Income (Loss), Net of Tax	(22)	(16)	(70)	(1,752)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	6,379	18,908	14,054	51,330
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	6,379	18,908	14,054	51,330
Non-Guarantors [Member]
Net Income (Loss) Attributable to Parent [Abstract]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	(34,979)	(3,984)	(322,770)	(1,001)
Net Income (Loss) Attributable to Noncontrolling Interest	0	0	0	0
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	0	0
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	0	0	0	0
Other Comprehensive Income (Loss), Net of Tax	0	0	0	0
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	(34,979)	(3,984)	(322,770)	(1,001)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	(34,979)	(3,984)	(322,770)	(1,001)
Consolidation, Eliminations [Member]
Net Income (Loss) Attributable to Parent [Abstract]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	(56,838)	(157,237)	440,942	248,744
Net Income (Loss) Attributable to Noncontrolling Interest	2,248	6,490	4,541	6,490
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	(1,305)	49,353	(6,866)	40,036
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	12,458	20,602	33,475	60,720
Other Comprehensive Income (Loss), Net of Tax	11,153	69,955	26,609	100,756
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	(45,685)	(87,282)	467,551	349,500
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	$ (47,933)	$ (93,772)	$ 463,010	$ 343,010

Related Party Transaction (Deta

Related Party Transaction (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015	Dec. 31, 2014
Related Party Transaction [Line Items]
Other General Expense	$ 100,056,000	$ 62,955,000	$ 286,776,000	$ 319,655,000
Income (Loss) from Equity Method Investments			41,239,000	38,838,000
Related Party Transaction, Expenses from Transactions with Related Party	31,216,000	27,890,000	$ 93,209,000	75,176,000
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		$ 400,000,000
Long-term Debt	2,731,455,000	2,508,000	2,731,455,000	2,508,000	$ 2,705,718,000
Financing Related Fees			3,000,000
Long-term debt, net of fees	197,000,000		197,000,000
Net Proceeds from Initial Public Offering			342,711,000
Cash paid for additional interest	$ 21,500,000		$ 21,500,000
Preferred Units, Issued	3,956,496		3,956,496
Preferred Stock, Par or Stated Value Per Share	$ 17.01		$ 17.01
Other Significant Noncash Transaction, Value of Consideration Given			$ 67,300,000
volume weighted average trading price	$ 14.79		$ 14.79
Accounts Payable, Related Parties	$ 1,320,000,000		$ 1,320,000,000		4,310,000,000
CONE Gathering [Member]
Related Party Transaction [Line Items]
Limited Partners' Contributed Capital	2,571,000	8,541,000	2,571,000	8,541,000
Distribution Made to Limited Partner, Cash Distributions Paid			1,640,000
Income (Loss) from Equity Method Investments	6,567,000	6,423,000	13,713,000	14,099,000
CONE Midstream [Member]
Related Party Transaction [Line Items]
Limited Partners' Contributed Capital	2,051,000	58,212,000	2,051,000	58,212,000
Distribution Made to Limited Partner, Cash Distributions Paid			20,628,000	12,364,000
Income (Loss) from Equity Method Investments	(7,586,000)	(6,310,000)	(22,996,000)	(15,671,000)
CONE [Member]
Related Party Transaction [Line Items]
Due from Related Parties	8,543,000		8,543,000		$ 12,216,000
Inventory, Raw Materials and Purchased Parts, Net of Reserves						$ 2,239
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		200,000,000
Operating and Other Costs [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party	854,000	2,736,000	3,390,000	5,177,000
Selling and Direct Administrative Expenses [Member] [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party	$ 856,000	$ 2,598,000	$ 3,090,000	$ 6,904,000

Stock Repurchase Stock Repurcha

Stock Repurchase Stock Repurchase Details (Details) - USD ($) $ / shares in Units, $ in Thousands	9 Months Ended
	Sep. 30, 2016	Dec. 31, 2015
Equity [Abstract]
Stock Repurchase Program, Authorized Amount		$ 250,000
Stock Repurchased During Period, Shares	2,213,100
Treasury Stock Acquired, Average Cost Per Share	$ 32.37