Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Cash Flows from Operating Activities:
Net Income	$ 93,558	$ 178,785	$ 82,569
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities:
Depreciation, Depletion and Amortization	207,097	201,264	172,002
Stock/Unit-Based Compensation	12,760	10,235	22,085
Gain on Sale of Assets	(1,995)	(565)	(17,212)
Amortization of Debt Issuance Costs	6,416	8,858	977
Loss on Debt Extinguishment	24,455	3,922	0
Deferred Income Taxes	(17,419)	(16,482)	16,610
Changes in Operating Assets:
Trade and Other Receivables	(38,960)	39,157	(44,417)
Inventories	(5,485)	4,774	(3,259)
Prepaid Expenses and Other Assets	497	(7,307)	(2,877)
Changes in Other Assets	17,302	15,583	5,729
Changes in Operating Liabilities:
Accounts Payable	(21,714)	37,488	7,043
Other Operating Liabilities	(7,884)	(38,659)	46,421
Changes in Other Liabilities	(24,062)	(23,526)	(40,765)
Other	0	(2)	3,204
Net Cash Provided by Operating Activities	244,566	413,525	248,110
Cash Flows from Investing Activities:
Capital Expenditures	(169,739)	(145,749)	(81,413)
Proceeds from Sales of Assets	2,201	2,103	24,582
Other Investing Activity	(5,003)	(10,000)	0
Net Cash Used in Investing Activities	(172,541)	(153,646)	(56,831)
Cash Flows from Financing Activities:
Payments on Finance Lease Obligations	(18,549)
Payments on Finance Lease Obligations		(15,484)	(3,904)
Net Payments on Revolver - MLP	0	0	(201,000)
Distributions to Noncontrolling Interest	(22,220)	(22,265)	(21,892)
Shares/Units Withheld for Taxes	(4,963)	(3,424)	(2,156)
Repurchases of Common Stock	(32,733)	(25,839)	0
Spin Distribution to CNX Resources Corporation	0	(18,234)	(425,000)
Other Parent Net Distributions	0	0	(156,502)
Premium Paid on Extinguishment of Debt	(6,773)	(2,458)	0
Debt Issuance and Financing Fees	(12,492)	(2,166)	(32,304)
Net Cash Provided by (Used in) Financing Activities	(256,667)	(148,923)	(50,611)
Net (Decrease) Increase in Cash and Cash Equivalents and Restricted Cash	(184,642)	110,956	140,668
Cash and Cash Equivalents and Restricted Cash at Beginning of Period	264,935	153,979	13,311
Cash and Cash Equivalents and Restricted Cash at End of Period	80,293	264,935	153,979
Term Loan A
Cash Flows from Financing Activities:
Proceeds from debt	26,250	0	100,000
Payments on debt	(11,250)	(26,250)	0
Term Loan B
Cash Flows from Financing Activities:
Proceeds from debt	0	0	392,147
Payments on debt	(124,437)	(4,000)	0
Senior Secured Second Lien Notes due 2025
Cash Flows from Financing Activities:
Proceeds from debt	0	0	300,000
Payments on debt	(52,648)	(25,724)	0
Other Asset-Backed Financing Arrangements
Cash Flows from Financing Activities:
Proceeds from debt	3,757	0	0
Payments on debt	(240)	0	0
CCR Units
Cash Flows from Financing Activities:
Repurchases of Common Stock	$ (369)	$ (3,079)	$ 0