Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2022	Mar. 31, 2021
Operating activities
Net income (loss)	$ 271,872	$ (6,042)
Adjustments to reconcile to cash from operating activities:
Depreciation, depletion and amortization	32,210	25,797
Accretion on asset retirement obligations	4,430	5,437
Deferred income taxes		372
Employee stock-based compensation expense	8,203	3,885
Amortization relating to financing activities	770	1,326
Gain on disposals and divestitures, net	(352)	(188)
Reclamation work completed	(4,278)	(11,553)
Contribution to fund asset retirement obligations	(20,000)
Changes in:
Receivables	(399)	(18,929)
Inventories	(47,263)	(28,387)
Accounts payable, accrued expenses and other current liabilities	14,115	13,827
Income taxes, net	442	(33)
Coal derivative assets and liabilities, including margin account	15,833	(537)
Other	17,356	20,711
Cash provided by operating activities	292,939	5,686
Investing activities
Capital expenditures	(22,288)	(76,758)
Minimum royalty payments		(62)
Proceeds from disposals and divestitures	360	188
Proceeds from sales of short-term investments	14,450	34,981
Investments in and advances to affiliates, net	(2,088)	(1,114)
Cash used in investing activities	(9,566)	(42,765)
Financing activities
Payments on term loan	(271,537)	(750)
Proceeds from tax exempt bonds		44,985
Net payments on other debt	(10,134)	(9,536)
Debt financing costs		(1,194)
Dividends paid	(3,851)
Payments for taxes related to net share settlement of equity awards	(4,827)	(1,316)
Proceeds from warrants exercised	506
Cash (used in) provided by financing activities	(289,843)	32,189
Decrease in cash and cash equivalents, including restricted cash	(6,470)	(4,890)
Cash and cash equivalents, including restricted cash, beginning of period	326,295	193,445
Cash and cash equivalents, including restricted cash, end of period	319,825	188,555
SUPPLEMENTAL CASH FLOW INFORMATION
Cash and cash equivalents	318,725	169,593
Restricted Cash	1,100	18,962
Cash and cash equivalents, including restricted cash	$ 319,825	$ 188,555

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