Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
Jun. 30, 2022	Jun. 30, 2021
Operating activities
Net income	$ 679,435	$ 21,824
Adjustments to reconcile to cash from operating activities:
Depreciation, depletion and amortization	64,990	53,681
Accretion on asset retirement obligations	8,860	10,874
Deferred income taxes		11
Employee stock-based compensation expense	14,552	8,498
Amortization relating to financing activities	1,130	3,110
Gain on disposals and divestitures, net	(697)	(413)
Reclamation work completed	(8,204)	(28,218)
Contribution to fund for asset retirement obligations	(80,000)
Changes in:
Receivables	(138,155)	(49,568)
Inventories	(56,018)	(36,523)
Accounts payable, accrued expenses and other current liabilities	37,083	14,590
Income taxes, net	427	2,337
Coal derivative assets and liabilities, including margin account	17,710	381
Other	20,054	25,525
Cash provided by operating activities	561,167	26,109
Investing activities
Capital expenditures	(53,157)	(147,957)
Minimum royalty payments	(1,000)	(1,124)
Proceeds from disposals and divestitures	1,547	438
Proceeds from sales of short-term investments	14,450	68,986
Investments in and advances to affiliates, net	(4,027)	(1,114)
Cash used in investing activities	(42,187)	(80,771)
Financing activities
Payments on term loan due 2024	(272,288)	(1,500)
Proceeds from tax exempt bonds		44,985
Payments on convertible debt	(129,941)
Net Payments on other debt	(19,939)	(18,795)
Debt financing costs		(1,537)
Dividends paid	(154,567)
Payments for taxes related to net share settlement of equity awards	(4,908)	(1,316)
Proceeds from warrants exercised	19,412
Cash (used in) provided by financing activities	(562,231)	21,837
Decrease in cash and cash equivalents, including restricted cash	(43,251)	(32,825)
Cash and cash equivalents, including restricted cash, beginning of period	326,295	193,445
Cash and cash equivalents, including restricted cash, end of period	283,044	160,620
SUPPLEMENTAL CASH FLOW INFORMATION
Cash and cash equivalents	281,944	153,516
Restricted Cash	1,100	7,104
Cash and cash equivalents, including restricted cash	$ 283,044	$ 160,620

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