Additional Balance Sheet Detail and Supplemental Cash Flow Information (Tables)

6 Months Ended

Jun. 30, 2026

Supplemental Cash Flow Information [Abstract]

Schedule of Accrued Liabilities [Table Text Block]

Accrued liabilities and other consist of the following:

In thousands	June 30, 2026		December 31, 2025
Accrued salaries and wages	$	58,154	$	42,354
Deferred revenue (1)	736		683
Income and mining taxes	91,239		116,230
Deferred Cash Due 2026(2)	5,000		4,829
Accrued operating costs	12,296		12,506
Unrealized losses on derivatives	1,350		124
Taxes other than income and mining	12,001		17,465
Accrued interest payable	13,225		6,060
Operating lease liabilities	7,865		11,962
Accrued liabilities and other	$	201,866	$	212,213

(1) See Note 17 -- Commitments and Contingencies for additional details on deferred revenue liabilities.

(2) See Note 12 -- Fair Value Measurements for additional details on Deferred Cash Due 2026. Payment provided in July 2026 to satisfy the contractual obligation.

Schedule of Cash Flow, Supplemental Disclosures

The following table provides a reconciliation of cash, cash equivalents, and restricted cash reported within the Condensed Consolidated Balance Sheets that total the same such amounts shown in the Condensed Consolidated Statements of Cash Flows in the three and six months ended June 30, 2026 and 2025:

In thousands	June 30, 2026		June 30, 2025
Cash and cash equivalents	$	1,052,274	$	111,646
Restricted cash equivalents(1)	3,608		1,824
Total cash, cash equivalents and restricted cash shown in the statement of cash flows	$	1,055,882	$	113,470

(1) Restricted cash equivalents are included in Prepaid expenses and other and Restricted assets on the Condensed Consolidated Balance Sheet.