Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Operating activities
Net income	$ 860,443	$ 110,967
Adjustments to reconcile to cash from operating activities:
Depreciation, depletion and amortization	98,948	84,441
Accretion on asset retirement obligations	13,290	16,311
Deferred income taxes		11
Employee stock-based compensation expense	20,837	12,841
Amortization relating to financing activities	1,958	4,801
Gain on disposals and divestitures, net	(1,012)	(857)
Reclamation work completed	(11,229)	(36,200)
Contribution to fund for asset retirement obligations	(110,000)
Changes in:
Receivables	108,635	(115,858)
Inventories	(58,438)	(29,862)
Accounts payable, accrued expenses and other current liabilities	58,791	12,827
Income taxes, net	826	1,247
Coal derivative assets and liabilities, including margin account	5,144	29,170
Other	27,038	1,743
Cash provided by operating activities	1,015,231	91,582
Investing activities
Capital expenditures	(94,517)	(212,046)
Minimum royalty payments	(1,069)	(1,186)
Proceeds from disposals and divestitures	1,963	1,135
Purchases of short-term investments	(10,675)
Proceeds from sales of short-term investments	14,450	81,986
Investments in and advances to affiliates, net	(6,692)	(2,723)
Cash used in investing activities	(96,540)	(132,834)
Financing activities
Payments on term loan due 2024	(273,038)	(2,250)
Proceeds from equipment financing		19,438
Proceeds from tax exempt bonds		44,985
Payments on convertible debt	(149,273)
Net payments on other debt	(23,942)	(20,208)
Debt financing costs	(690)	(2,057)
Dividends paid	(264,638)
Purchases of treasury stock	(56,498)
Payments for taxes related to net share settlement of equity awards	(4,908)	(1,293)
Proceeds from warrants exercised	19,422
Cash (used in) provided by financing activities	(753,565)	38,615
Increase (decrease) in cash and cash equivalents, including restricted cash	165,126	(2,637)
Cash and cash equivalents, including restricted cash, beginning of period	326,295	193,445
Cash and cash equivalents, including restricted cash, end of period	491,421	190,808
SUPPLEMENTAL CASH FLOW INFORMATION
Cash and cash equivalents	490,321	189,707
Restricted Cash	1,100	1,101
Cash and cash equivalents, including restricted cash	$ 491,421	$ 190,808