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

6 Months Ended

Jun. 30, 2022

Supplemental Cash Flow Information [Abstract]

Schedule of Accrued Liabilities [Table Text Block]

Accrued liabilities and other consist of the following:

In thousands	June 30, 2022		December 31, 2021
Accrued salaries and wages	$	21,844	$	28,408
Deferred revenue (1)	26,081		16,093
Income and mining taxes	10,214		13,856
Accrued operating costs	8,158		5,592
Unrealized losses on derivatives	77		1,374
Taxes other than income and mining	2,812		3,284
Accrued interest payable	8,072		8,038
Operating lease liabilities	11,076		11,301
Accrued liabilities and other	$	88,334	$	87,946

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 statement of financial position that total the same such amounts shown in the statement of cash flows in the three and six months ended June 30, 2022 and 2021:

In thousands	June 30, 2022		June 30, 2021
Cash and cash equivalents	$	74,159	$	124,075
Restricted cash equivalents	1,396		1,383
Total cash, cash equivalents and restricted cash shown in the statement of cash flows	$	75,555	$	125,458