Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Cash Flows from Operating Activities:
Net (Loss) Income	$ (18,588)	$ 69,133
Adjustments to Reconcile Net (Loss) Income to Net Cash Provided by Operating Activities:
Depreciation, Depletion and Amortization	101,098	96,875
Gain on Sale of Assets	(7,315)	(1,272)
Stock/Unit-Based Compensation	7,250	10,375
Amortization of Debt Issuance Costs	3,146	3,470
(Gain) Loss on Debt Extinguishment	(16,833)	24,643
Deferred Income Taxes	(5,775)	(15,770)
Equity in Earnings of Affiliates	586	0
Changes in Operating Assets:
Accounts and Notes Receivable	42,469	(10,757)
Inventories	(6,910)	(2,545)
Prepaid Expenses and Other Assets	11,936	386
Changes in Other Assets	2,989	13,365
Changes in Operating Liabilities:
Accounts Payable	(37,669)	(6,023)
Other Operating Liabilities	(7,004)	(1,054)
Changes in Other Liabilities	(22,700)	(15,025)
Net Cash Provided by Operating Activities	46,680	165,801
Cash Flows from Investing Activities:
Capital Expenditures	(46,447)	(82,954)
Proceeds from Sales of Assets	689	1,300
Net Cash Used in Investing Activities	(45,758)	(81,654)
Cash Flows from Financing Activities:
Proceeds from Finance Lease Obligations	16,293	0
Payments on Finance Lease Obligations	(11,928)	(9,132)
Repurchases of Common Stock	0	(9,550)
Distributions to Noncontrolling Interest	(5,575)	(11,119)
Shares/Units Withheld for Taxes	(772)	(4,743)
Debt-Related Financing Fees	(9,002)	(20,169)
Net Cash Used in Financing Activities	(48,188)	(174,714)
Net Decrease in Cash and Cash Equivalents and Restricted Cash	(47,266)	(90,567)
Cash and Cash Equivalents and Restricted Cash at Beginning of Period	80,293	264,935
Cash and Cash Equivalents and Restricted Cash at End of Period	33,027	174,368
Non-Cash Investing and Financing Activities:
Finance Lease	13,003	0
Longwall Shield Rebuild	11,153	0
CONSOL Coal Resources L P Member
Cash Flows from Financing Activities:
Repurchases of Common Stock	0	(119)
Term Loan A Facility [Member]
Cash Flows from Financing Activities:
Proceeds from Term Loan	0	26,250
Payments on Debt	(10,000)	(3,750)
Term Loan B Facility [Member]
Cash Flows from Financing Activities:
Payments on Debt	(1,375)	(123,062)
Senior Secured Second Lien Notes due 2025 [Member]
Cash Flows from Financing Activities:
Payments on Debt	(25,480)	(19,320)
Other Asset Backed Financing [Member]
Cash Flows from Financing Activities:
Payments on Debt	$ (349)	$ 0