Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Cash Flows from Operating Activities:
Net (Loss) Income	$ (27,948)	$ 76,157
Adjustments to Reconcile Net (Loss) Income to Net Cash Provided by Operating Activities:
Depreciation, Depletion and Amortization	156,057	151,245
Gain on Sale of Assets	(15,241)	(1,986)
Stock/Unit-Based Compensation	9,462	13,349
Amortization of Debt Issuance Costs	5,301	4,953
(Gain) Loss on Debt Extinguishment	(17,911)	25,444
Deferred Income Taxes	143	(16,402)
Equity in Earnings of Affiliates	1,147	0
Changes in Operating Assets:
Accounts and Notes Receivable	25,197	(10,002)
Inventories	(2,446)	(193)
Prepaid Expenses and Other Assets	5,880	(3,009)
Changes in Other Assets	(16,902)	14,332
Changes in Operating Liabilities:
Accounts Payable	(29,746)	(10,233)
Other Operating Liabilities	(1,645)	3,204
Changes in Other Liabilities	(28,960)	(23,676)
Net Cash Provided by Operating Activities	62,388	223,183
Cash Flows from Investing Activities:
Capital Expenditures	(65,955)	(131,475)
Proceeds from Sales of Assets	8,779	2,015
Other Investing Activity	(229)	0
Net Cash Used in Investing Activities	(57,405)	(129,460)
Cash Flows from Financing Activities:
Proceeds from Finance Lease Obligations	16,293	0
Payments on Finance Lease Obligations	(18,732)	(13,784)
Repurchases of Common Stock	0	(31,318)
Distributions to Noncontrolling Interest	(5,575)	(16,674)
Shares/Units Withheld for Taxes	(772)	(4,745)
Debt-Related Financing Fees	(9,002)	(20,628)
Net Cash Used in Financing Activities	(62,992)	(223,809)
Net Decrease in Cash and Cash Equivalents and Restricted Cash	(58,009)	(130,086)
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	22,284	134,849
Non-Cash Investing and Financing Activities:
Finance Lease	17,335	0
Other Equipment Financing	13,123	3,834
CONSOL Coal Resources L P Member
Cash Flows from Financing Activities:
Repurchases of Common Stock	0	(369)
Term Loan A Facility [Member]
Cash Flows from Financing Activities:
Proceeds from Term Loan	0	26,250
Payments on Debt	(16,250)	(7,500)
Term Loan B Facility [Member]
Cash Flows from Financing Activities:
Payments on Debt	(2,063)	(123,750)
Senior Secured Second Lien Notes due 2025 [Member]
Cash Flows from Financing Activities:
Payments on Debt	(26,365)	(35,048)
Other Asset Backed Financing [Member]
Cash Flows from Financing Activities:
Proceeds from Term Loan	0	3,757
Payments on Debt	$ (526)	$ 0