Consolidated Statements of Cash Flows $ in Thousands	12 Months Ended
	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)
Cash Flows from Operating Activities:
Net Income	$ 178,785	$ 82,569	$ 50,450
Adjustments to Reconcile Net Income to Net Cash Provided By Continuing Operating Activities:
Depreciation, Depletion and Amortization	201,264	172,002	178,122
Stock/Unit-Based Compensation	10,235	22,085	12,895
Gain on Sale of Assets	(565)	(17,212)	(5,228)
Deferred Income Taxes	(16,482)	16,610	91,525
Changes in Operating Assets:
Accounts and Notes Receivable	39,157	(44,417)	(17,608)
Inventories	4,774	(3,259)	3,352
Prepaid Expenses and Other Assets	(7,307)	(2,877)	7,503
Changes in Other Assets	19,170	6,050	(10,652)
Changes in Operating Liabilities:
Accounts Payable	37,488	7,043	(4,152)
Other Operating Liabilities	(38,659)	46,421	24,913
Changes in Other Liabilities	(23,526)	(40,765)	(10,609)
Other	9,191	3,860	8,596
Net Cash Provided by Operating Activities	413,525	248,110	329,107
Cash Flows from Investing Activities:
Capital Expenditures	(145,749)	(81,413)	(53,600)
Proceeds from Sales of Assets	2,103	24,582	7,842
Other Investing Activity	(10,000)	0	0
Net Cash Used in Investing Activities	(153,646)	(56,831)	(45,758)
Cash Flows from Financing Activities:
(Payments on) Proceeds from Capitalized Leases/Miscellaneous Borrowings	(15,484)	(3,904)	431
Net (Payments on) Proceeds from Revolver - MLP	0	(201,000)	16,000
Distributions to Noncontrolling Interest	(22,265)	(21,892)	(21,657)
Shares/Units Withheld for Taxes	(3,424)	(2,156)	0
Repurchases of Common Stock	(25,839)	0	0
Spin Distribution to CNX Resources Corporation	(18,234)	(425,000)	0
Other Parent Net Distributions	0	(156,502)	(270,969)
Premium Paid on Extinguishment of Debt	(2,458)	0	0
Debt Issuance and Financing Fees	(2,166)	(32,304)	(482)
Net Cash Provided by (Used in) Financing Activities	(148,923)	(50,611)	(276,677)
Net Increase in Cash and Cash Equivalents and Restricted Cash	110,956	140,668	6,672
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	264,935	153,979	13,311
Term Loan A
Cash Flows from Financing Activities:
(Payments on) Proceeds from Debt	(26,250)	100,000	0
Term Loan B
Cash Flows from Financing Activities:
(Payments on) Proceeds from Debt	(4,000)	392,147	0
Senior Secured Second Lien Notes due 2025
Cash Flows from Financing Activities:
(Payments on) Proceeds from Debt	(25,724)	300,000	0
Consol Coal Resources LP Units
Cash Flows from Financing Activities:
Repurchases of Common Stock	$ (3,079)	$ 0	$ 0