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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount of cash outflow for principal payment on finance lease.

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Amount of cash inflow (outflow) from financing activities, including discontinued operations. Financing activity cash flows include obtaining resources from owners and providing them with a return on, and a return of, their investment; borrowing money and repaying amounts borrowed, or settling the obligation; and obtaining and paying for other resources obtained from creditors on long-term credit.

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Amount of cash inflow (outflow) from investing activities, including discontinued operations. Investing activity cash flows include making and collecting loans and acquiring and disposing of debt or equity instruments and property, plant, and equipment and other productive assets.

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Amount of cash inflow (outflow) from operating activities, including discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities.

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The net cash outflow or inflow associated with the acquisition or sale of a business segment during the period.

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The cash outflow to reacquire common stock during the period.

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The cash outflow paid to third parties in connection with debt origination, which will be amortized over the remaining maturity period of the associated long-term debt.

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Amount of cash outflow to satisfy grantee's tax withholding obligation for award under share-based payment arrangement.

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The cash outflow for purchases of and capital improvements on property, plant and equipment (capital expenditures), software, and other intangible assets.

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The cash inflow during the period from additional borrowings in aggregate debt. Includes proceeds from short-term and long-term debt.

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Amount of cash inflow (outflow) from (to) a noncontrolling interest. Excludes dividends paid to the noncontrolling interest.

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The net cash inflow or outflow in aggregate debt due to repayments and proceeds from additional borrowings.

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Amount of cash inflow (outflow) from long-term debt by a related party. Related parties, include, but are not limited to, affiliates, owners or officers and their immediate families, and pension trusts.

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The cash inflow from the sale of property, plant and equipment (capital expenditures), software, and other intangible assets.

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The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations.

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The cash outflow for the obligation for a lease meeting the criteria for capitalization (with maturities exceeding one year or beyond the operating cycle of the entity, if longer).

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GUARANTOR SUBSIDIARIES FINANCIAL INFORMATION - Condensed Statement of Cash Flows (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Condensed Cash Flow Statements, Captions [Line Items]
Net Cash Provided by (Used in) Operating Activities			$ 165,801	$ 278,192
Cash Flows from Investing Activities:
Capital Expenditures	$ (48,783)	$ (34,243)	(82,954)	(56,199)
Proceeds from Sales of Assets			1,300	1,229
(Investments in), net of Distributions from, Subsidiaries			0	0
Net Cash Used in Investing Activities			(81,654)	(54,970)
Cash Flows from Financing Activities:
Payments on Finance Leases			(9,132)
Payments on Finance Leases				(6,597)
Net (Payments on) Proceeds from Related Party Long-Term Notes			0	0
Distributions to Noncontrolling Interest			(11,119)	(11,174)
Shares/Units Withheld for Taxes			(4,743)	(2,871)
Repurchases of Common Stock			(9,550)	(3,281)
Spin Distribution to CNX Resources				(18,234)
Debt-Related Financing Fees			(20,169)	(1,767)
Net Cash Used in Financing Activities			(174,714)	(92,698)
Term Loan A
Cash Flows from Financing Activities:
Proceeds from Term Loan A			26,250	0
Payments on Term Loan A			(3,750)	(26,250)
Term Loan B
Cash Flows from Financing Activities:
Proceeds from (Payments on) loans			(123,062)	(2,000)
Senior Secured Second Lien Notes due 2025
Cash Flows from Financing Activities:
Proceeds from (Payments on) loans			(19,320)	(20,524)
Elimination
Condensed Cash Flow Statements, Captions [Line Items]
Net Cash Provided by (Used in) Operating Activities			0	0
Cash Flows from Investing Activities:
Capital Expenditures			0	0
Proceeds from Sales of Assets			0	0
(Investments in), net of Distributions from, Subsidiaries			(8,846)	(17,519)
Net Cash Used in Investing Activities			(8,846)	(17,519)
Cash Flows from Financing Activities:
Payments on Finance Leases			0
Payments on Finance Leases				0
Net (Payments on) Proceeds from Related Party Long-Term Notes			0	0
Distributions to Noncontrolling Interest			17,690	17,519
Shares/Units Withheld for Taxes			0	0
Repurchases of Common Stock			0	0
Spin Distribution to CNX Resources				0
Debt-Related Financing Fees			0	0
Net Cash Used in Financing Activities			17,690	17,519
Elimination \| Term Loan A
Cash Flows from Financing Activities:
Proceeds from Term Loan A			0
Payments on Term Loan A			0	0
Elimination \| Term Loan B
Cash Flows from Financing Activities:
Proceeds from (Payments on) loans			0	0
Elimination \| Senior Secured Second Lien Notes due 2025
Cash Flows from Financing Activities:
Proceeds from (Payments on) loans			0	0
Parent Issuer \| Reportable Legal Entities
Condensed Cash Flow Statements, Captions [Line Items]
Net Cash Provided by (Used in) Operating Activities			161,749	(1,344)
Cash Flows from Investing Activities:
Capital Expenditures			0	0
Proceeds from Sales of Assets			0	0
(Investments in), net of Distributions from, Subsidiaries			(86,783)	21,478
Net Cash Used in Investing Activities			(86,783)	21,478
Cash Flows from Financing Activities:
Payments on Finance Leases			0
Payments on Finance Leases				0
Net (Payments on) Proceeds from Related Party Long-Term Notes			(2,000)	36,083
Distributions to Noncontrolling Interest			0	0
Shares/Units Withheld for Taxes			(4,743)	0
Repurchases of Common Stock			(9,550)	(3,281)
Spin Distribution to CNX Resources				0
Debt-Related Financing Fees			(20,169)	(1,767)
Net Cash Used in Financing Activities			(156,463)	(17,739)
Parent Issuer \| Reportable Legal Entities \| Term Loan A
Cash Flows from Financing Activities:
Proceeds from Term Loan A			26,250
Payments on Term Loan A			(3,750)	(26,250)
Parent Issuer \| Reportable Legal Entities \| Term Loan B
Cash Flows from Financing Activities:
Proceeds from (Payments on) loans			(123,062)	(2,000)
Parent Issuer \| Reportable Legal Entities \| Senior Secured Second Lien Notes due 2025
Cash Flows from Financing Activities:
Proceeds from (Payments on) loans			(19,320)	(20,524)
Guarantor \| Reportable Legal Entities
Condensed Cash Flow Statements, Captions [Line Items]
Net Cash Provided by (Used in) Operating Activities			(43,026)	201,323
Cash Flows from Investing Activities:
Capital Expenditures			(64,908)	(44,020)
Proceeds from Sales of Assets			1,296	1,064
(Investments in), net of Distributions from, Subsidiaries			95,629	(3,959)
Net Cash Used in Investing Activities			32,017	(46,915)
Cash Flows from Financing Activities:
Payments on Finance Leases			(7,242)
Payments on Finance Leases				(5,186)
Net (Payments on) Proceeds from Related Party Long-Term Notes			0	0
Distributions to Noncontrolling Interest			0	0
Shares/Units Withheld for Taxes			880	(1,972)
Repurchases of Common Stock			0	0
Spin Distribution to CNX Resources				(18,234)
Debt-Related Financing Fees			0	0
Net Cash Used in Financing Activities			(6,362)	(25,392)
Guarantor \| Reportable Legal Entities \| Term Loan A
Cash Flows from Financing Activities:
Proceeds from Term Loan A			0
Payments on Term Loan A			0	0
Guarantor \| Reportable Legal Entities \| Term Loan B
Cash Flows from Financing Activities:
Proceeds from (Payments on) loans			0	0
Guarantor \| Reportable Legal Entities \| Senior Secured Second Lien Notes due 2025
Cash Flows from Financing Activities:
Proceeds from (Payments on) loans			0	0
Non-Guarantor \| Reportable Legal Entities
Condensed Cash Flow Statements, Captions [Line Items]
Net Cash Provided by (Used in) Operating Activities			0	0
Cash Flows from Investing Activities:
Capital Expenditures			0	0
Proceeds from Sales of Assets			0	0
(Investments in), net of Distributions from, Subsidiaries			0	0
Net Cash Used in Investing Activities			0	0
Cash Flows from Financing Activities:
Payments on Finance Leases			0
Payments on Finance Leases				0
Net (Payments on) Proceeds from Related Party Long-Term Notes			0	0
Distributions to Noncontrolling Interest			0	0
Shares/Units Withheld for Taxes			0	0
Repurchases of Common Stock			0	0
Spin Distribution to CNX Resources				0
Debt-Related Financing Fees			0	0
Net Cash Used in Financing Activities			0	0
Non-Guarantor \| Reportable Legal Entities \| Term Loan A
Cash Flows from Financing Activities:
Proceeds from Term Loan A			0
Payments on Term Loan A			0	0
Non-Guarantor \| Reportable Legal Entities \| Term Loan B
Cash Flows from Financing Activities:
Proceeds from (Payments on) loans			0	0
Non-Guarantor \| Reportable Legal Entities \| Senior Secured Second Lien Notes due 2025
Cash Flows from Financing Activities:
Proceeds from (Payments on) loans			0	0
Non-Guarantor \| CCR Non-Guarantor \| Reportable Legal Entities
Condensed Cash Flow Statements, Captions [Line Items]
Net Cash Provided by (Used in) Operating Activities			47,078	78,213
Cash Flows from Investing Activities:
Capital Expenditures			(18,046)	(12,179)
Proceeds from Sales of Assets			4	165
(Investments in), net of Distributions from, Subsidiaries			0	0
Net Cash Used in Investing Activities			(18,042)	(12,014)
Cash Flows from Financing Activities:
Payments on Finance Leases			(1,890)
Payments on Finance Leases				(1,411)
Net (Payments on) Proceeds from Related Party Long-Term Notes			2,000	(36,083)
Distributions to Noncontrolling Interest			(28,809)	(28,693)
Shares/Units Withheld for Taxes			(880)	(899)
Repurchases of Common Stock			0	0
Spin Distribution to CNX Resources				0
Debt-Related Financing Fees			0	0
Net Cash Used in Financing Activities			(29,579)	(67,086)
Non-Guarantor \| CCR Non-Guarantor \| Reportable Legal Entities \| Term Loan A
Cash Flows from Financing Activities:
Proceeds from Term Loan A			0
Payments on Term Loan A			0	0
Non-Guarantor \| CCR Non-Guarantor \| Reportable Legal Entities \| Term Loan B
Cash Flows from Financing Activities:
Proceeds from (Payments on) loans			0	0
Non-Guarantor \| CCR Non-Guarantor \| Reportable Legal Entities \| Senior Secured Second Lien Notes due 2025
Cash Flows from Financing Activities:
Proceeds from (Payments on) loans			0	0
Consol Coal Resources LP Units
Cash Flows from Financing Activities:
Repurchases of Common Stock			(119)	$ 0
Consol Coal Resources LP Units \| Elimination
Cash Flows from Financing Activities:
Repurchases of Common Stock			0
Consol Coal Resources LP Units \| Parent Issuer \| Reportable Legal Entities
Cash Flows from Financing Activities:
Repurchases of Common Stock			(119)
Consol Coal Resources LP Units \| Guarantor \| Reportable Legal Entities
Cash Flows from Financing Activities:
Repurchases of Common Stock			0
Consol Coal Resources LP Units \| Non-Guarantor \| Reportable Legal Entities
Cash Flows from Financing Activities:
Repurchases of Common Stock			0
Consol Coal Resources LP Units \| Non-Guarantor \| CCR Non-Guarantor \| Reportable Legal Entities
Cash Flows from Financing Activities:
Repurchases of Common Stock			$ 0