Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Cash Flows from Operating Activities:
Net (Loss) Income	$ (4,450)	$ 26,404
Adjustments to Reconcile Net (Loss) Income to Net Cash Provided by Operating Activities:
Depreciation, Depletion and Amortization total	55,954	59,897
Gain on Sale of Assets	(6,181)	(8,202)
Stock-Based Compensation	4,201	1,509
Amortization of Debt Issuance Costs	2,020	2,140
Loss (Gain) on Debt Extinguishment	2,122	(683)
Unrealized Mark-to-Market Loss on Commodity Derivative Instruments	101,902	0
Deferred Income Taxes	(5,078)	5,185
Equity in Earnings of Affiliates	162	206
Changes in Operating Assets:
Accounts and Notes Receivable	(74,050)	(5,764)
Inventories	4,078	475
Prepaid Expenses and Other Assets	2,165	1,620
Changes in Other Assets	(5,582)	(1,459)
Changes in Operating Liabilities:
Accounts Payable	23,456	(73)
Other Operating Liabilities	45,196	9,242
Changes in Other Liabilities	2,292	(12,501)
Net Cash Provided by Operating Activities	148,207	77,996
Cash Flows from Investing Activities:
Capital Expenditures	(36,643)	(13,800)
Proceeds from Sales of Assets	6,478	8,488
Other Investing Activity	(1,329)	(182)
Net Cash Used in Investing Activities	(31,494)	(5,494)
Cash Flows from Financing Activities:
Payments on Finance Lease Obligations	(6,328)	(8,498)
Shares Withheld for Taxes	(6,072)	(2,072)
Net Cash Used in Financing Activities	(45,911)	(31,875)
Net Increase in Cash and Cash Equivalents and Restricted Cash	70,802	40,627
Cash and Cash Equivalents and Restricted Cash at Beginning of Period	198,206	50,850
Cash and Cash Equivalents and Restricted Cash at End of Period	269,008	91,477
Cash and Cash Equivalents	222,901	91,174
Restricted Cash - Current	33,854	303
Restricted Cash - Non-current	12,253	0
Cash and Cash Equivalents and Restricted Cash at End of Period	269,008	91,477
Non-Cash Investing and Financing Activities:
Finance Lease	4,166	8,226
Term Loan A Facility [Member]
Cash Flows from Financing Activities:
Payments on Debt	(6,250)	(6,250)
Term Loan B Facility [Member]
Cash Flows from Financing Activities:
Payments on Debt	(687)	(5,536)
Senior Secured Second Lien Notes due 2025 [Member]
Cash Flows from Financing Activities:
Payments on Debt	(26,387)	(9,338)
Other Asset Backed Financing [Member]
Cash Flows from Financing Activities:
Payments on Debt	$ (187)	$ (181)