GUARANTOR SUBSIDIARIES FINANCIAL INFORMATION - Condensed Statement of Cash Flows (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Condensed Cash Flow Statements, Captions [Line Items]
Net Cash Provided by (Used in) Operating Activities	$ 115,733	$ 48,537
Cash Flows from Investing Activities:
Capital Expenditures	(21,956)	(9,021)
Proceeds from Sales of Assets	393	9,709
(Investments in), net of Distributions from, Equity Affiliates	0	0
Net Cash (Used in) Provided by Investing Activities	(21,563)	688
Cash Flows from Financing Activities:
Payments on Capitalized Lease Obligations	(1,366)	0
Affiliated Credit Facility	0	(4,000)
Distributions to Noncontrolling Interest	(5,587)	(5,467)
Shares/Units Withheld for Taxes	(2,788)	(807)
Intercompany Contributions/(Distributions)	0	0
Change in Parent Net Investment		(45,624)
Spin Distribution to CNX Resources	(18,234)	0
Repurchases of Common Stock	(1,285)	0
Debt-Related Financing Fees	(1,170)	0
Net Cash Used in Financing Activities	(56,430)	(55,898)
Term Loan A
Cash Flows from Financing Activities:
Repayment of debt	(15,000)
Term Loan B
Cash Flows from Financing Activities:
Repayment of debt	(1,000)
Senior Secured Second Lien Notes due 2025
Cash Flows from Financing Activities:
Repayment of debt	(10,000)
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, Equity Affiliates	0	0
Net Cash (Used in) Provided by Investing Activities	0	0
Cash Flows from Financing Activities:
Payments on Capitalized Lease Obligations	0	0
Affiliated Credit Facility	9,583	0
Distributions to Noncontrolling Interest	8,759	8,583
Shares/Units Withheld for Taxes	0	0
Intercompany Contributions/(Distributions)	0	0
Change in Parent Net Investment		0
Spin Distribution to CNX Resources	0
Repurchases of Common Stock	0
Debt-Related Financing Fees	0	0
Net Cash Used in Financing Activities	18,342	8,583
Elimination | Term Loan A
Cash Flows from Financing Activities:
Repayment of debt	0
Elimination | Term Loan B
Cash Flows from Financing Activities:
Repayment of debt	0
Elimination | Senior Secured Second Lien Notes due 2025
Cash Flows from Financing Activities:
Repayment of debt	0
Parent Issuer | Reportable Legal Entities
Condensed Cash Flow Statements, Captions [Line Items]
Net Cash Provided by (Used in) Operating Activities	(2,305)	(4,643)
Cash Flows from Investing Activities:
Capital Expenditures	0	0
Proceeds from Sales of Assets	0	0
(Investments in), net of Distributions from, Equity Affiliates	(2,048)	20,226
Net Cash (Used in) Provided by Investing Activities	(2,048)	20,226
Cash Flows from Financing Activities:
Payments on Capitalized Lease Obligations	0	(896)
Affiliated Credit Facility	0	0
Distributions to Noncontrolling Interest	0	0
Shares/Units Withheld for Taxes	0	0
Intercompany Contributions/(Distributions)	72,317	45,624
Change in Parent Net Investment		(45,624)
Spin Distribution to CNX Resources	(1,595)
Repurchases of Common Stock	(1,285)
Debt-Related Financing Fees	(755)	(7,995)
Net Cash Used in Financing Activities	42,682	(8,891)
Parent Issuer | Reportable Legal Entities | Term Loan A
Cash Flows from Financing Activities:
Repayment of debt	(15,000)
Parent Issuer | Reportable Legal Entities | Term Loan B
Cash Flows from Financing Activities:
Repayment of debt	(1,000)
Parent Issuer | Reportable Legal Entities | Senior Secured Second Lien Notes due 2025
Cash Flows from Financing Activities:
Repayment of debt	(10,000)
Guarantor | Reportable Legal Entities
Condensed Cash Flow Statements, Captions [Line Items]
Net Cash Provided by (Used in) Operating Activities	88,774	35,518
Cash Flows from Investing Activities:
Capital Expenditures	(17,027)	(6,991)
Proceeds from Sales of Assets	318	9,709
(Investments in), net of Distributions from, Equity Affiliates	2,048	(20,226)
Net Cash (Used in) Provided by Investing Activities	(14,661)	(17,508)
Cash Flows from Financing Activities:
Payments on Capitalized Lease Obligations	(999)	922
Affiliated Credit Facility	0	0
Distributions to Noncontrolling Interest	0	0
Shares/Units Withheld for Taxes	(1,889)	0
Intercompany Contributions/(Distributions)	(72,317)	(45,624)
Change in Parent Net Investment		0
Spin Distribution to CNX Resources	(16,639)
Repurchases of Common Stock	0
Debt-Related Financing Fees	(415)	7,995
Net Cash Used in Financing Activities	(92,259)	(36,707)
Guarantor | Reportable Legal Entities | Term Loan A
Cash Flows from Financing Activities:
Repayment of debt	0
Guarantor | Reportable Legal Entities | Term Loan B
Cash Flows from Financing Activities:
Repayment of debt	0
Guarantor | Reportable Legal Entities | Senior Secured Second Lien Notes due 2025
Cash Flows from Financing Activities:
Repayment of debt	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, Equity Affiliates	0	0
Net Cash (Used in) Provided by Investing Activities	0	0
Cash Flows from Financing Activities:
Payments on Capitalized Lease Obligations	0	0
Affiliated Credit Facility	0	0
Distributions to Noncontrolling Interest	0	0
Shares/Units Withheld for Taxes	0	0
Intercompany Contributions/(Distributions)	0	0
Change in Parent Net Investment		0
Spin Distribution to CNX Resources	0
Repurchases of Common Stock	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:
Repayment of debt	0
Non-Guarantor | Reportable Legal Entities | Term Loan B
Cash Flows from Financing Activities:
Repayment of debt	0
Non-Guarantor | Reportable Legal Entities | Senior Secured Second Lien Notes due 2025
Cash Flows from Financing Activities:
Repayment of debt	0
Non-Guarantor | CCR Non-Guarantor | Reportable Legal Entities
Condensed Cash Flow Statements, Captions [Line Items]
Net Cash Provided by (Used in) Operating Activities	29,264	17,662
Cash Flows from Investing Activities:
Capital Expenditures	(4,929)	(2,030)
Proceeds from Sales of Assets	75	0
(Investments in), net of Distributions from, Equity Affiliates	0	0
Net Cash (Used in) Provided by Investing Activities	(4,854)	(2,030)
Cash Flows from Financing Activities:
Payments on Capitalized Lease Obligations	(367)	(26)
Affiliated Credit Facility	(9,583)	(4,000)
Distributions to Noncontrolling Interest	(14,346)	(14,050)
Shares/Units Withheld for Taxes	(899)	(807)
Intercompany Contributions/(Distributions)	0	0
Change in Parent Net Investment		0
Spin Distribution to CNX Resources	0
Repurchases of Common Stock	0
Debt-Related Financing Fees	0	0
Net Cash Used in Financing Activities	(25,195)	$ (18,883)
Non-Guarantor | CCR Non-Guarantor | Reportable Legal Entities | Term Loan A
Cash Flows from Financing Activities:
Repayment of debt	0
Non-Guarantor | CCR Non-Guarantor | Reportable Legal Entities | Term Loan B
Cash Flows from Financing Activities:
Repayment of debt	0
Non-Guarantor | CCR Non-Guarantor | Reportable Legal Entities | Senior Secured Second Lien Notes due 2025
Cash Flows from Financing Activities:
Repayment of debt	$ 0