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

3 Months Ended

Mar. 31, 2023

Supplemental Cash Flow Information [Abstract]

Schedule of Accrued Liabilities [Table Text Block]

Accrued liabilities and other consist of the following:

In thousands	March 31, 2023		December 31, 2022
Accrued salaries and wages	$	20,960	$	29,868
Deferred revenue (1)	15,852		25,736
Income and mining taxes	1,714		7,874
Accrued operating costs	8,327		6,241
Unrealized losses on derivatives	5,458		10
Taxes other than income and mining	1,866		3,318
Accrued interest payable	3,481		8,256
Operating lease liabilities	11,564		11,560
Accrued liabilities and other	$	69,222	$	92,863

Schedule of Cash Flow, Supplemental Disclosures [Table Text Block]

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 months ended March 31, 2023 and 2022:

In thousands	March 31, 2023		March 31, 2022
Cash and cash equivalents	$	66,977	$	73,330
Restricted cash equivalents	1,706		1,389
Total cash, cash equivalents and restricted cash shown in the Condensed Consolidated Statements of Cash Flows	$	68,683	$	74,719