Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Operating activities
Net income	$ 55,953	$ 198,108
Adjustments to reconcile to cash from operating activities:
Depreciation, depletion and amortization	38,820	35,479
Accretion on asset retirement obligations	5,869	5,292
Deferred income taxes	3,660	35,548
Employee stock-based compensation expense	5,588	6,767
Amortization relating to financing activities	658	450
Gain on disposals and divestitures, net	(24)	(279)
Reclamation work completed	(1,355)	(3,887)
Contribution to fund for asset retirement obligations	(1,881)	(1,141)
Changes in:
Receivables	52,618	(57,968)
Inventories	571	(48,140)
Accounts payable, accrued expenses and other current liabilities	(33,481)	(63,508)
Income taxes, net	30	1,491
Other	1,240	17,909
Cash provided by operating activities	128,266	126,121
Investing activities
Capital expenditures	(45,446)	(30,541)
Minimum royalty payments	(50)	(113)
Proceeds from disposals and divestitures	90	343
Purchases of short-term investments	(11,332)	(2,930)
Proceeds from sales of short-term investments	9,867	8,000
Investments in and advances to affiliates, net	(4,203)	(4,329)
Cash used in investing activities	(51,074)	(29,570)
Financing activities
Proceeds from issuance of term loan due 2025	20,000
Payments on term loan due 2024	(3,502)	(750)
Payments on convertible debt		(58,430)
Net payments on other debt	(12,796)	(12,647)
Debt financing costs	(1,500)
Purchases of treasury stock	(13,749)	(20,806)
Dividends paid	(43,662)	(66,902)
Payments for taxes related to net share settlement of equity awards	(24,259)	(27,055)
Proceeds from warrants exercised		43,719
Cash used in financing activities	(79,468)	(142,871)
Decrease in cash and cash equivalents, including restricted cash	(2,276)	(46,320)
Cash and cash equivalents, including restricted cash, beginning of period	288,907	237,159
Cash and cash equivalents, including restricted cash, end of period	286,631	190,839
SUPPLEMENTAL CASH FLOW INFORMATION
Cash and cash equivalents	285,531	189,739
Restricted Cash	$ 1,100	$ 1,100