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

12 Months Ended

Dec. 31, 2020

Supplemental Cash Flow Information [Abstract]

Schedule of Accrued Liabilities [Table Text Block]

Accrued liabilities and other consist of the following:

In thousands	December 31, 2020		December 31, 2019
Accrued salaries and wages	$	30,457	$	20,047
Silvertip contingent consideration	—		25,000
Deferred revenue (1)	16,425		16,672
Income and mining taxes	26,118		11,243
Accrued operating costs	3,327		3,752
Unrealized losses on derivatives	24,950		411
Taxes other than income and mining	3,616		3,554
Accrued interest payable	1,855		1,833
Operating lease liabilities	12,410		13,104
Accrued liabilities and other	$	119,158	$	95,616

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 year ended December 31, 2020 and 2019:

In thousands	December 31, 2020		December 31, 2019
Cash and cash equivalents	$	92,794	$	55,645
Restricted cash equivalents	1,376		1,373
Total cash, cash equivalents and restricted cash shown in the statement of cash flows	$	94,170	$	57,018

The following table presents non-cash financing and investing activities and other cash flow information:

	Year ended December 31,
Non-cash financing and investing activities:	2020		2019		2018
Finance lease obligations	$	5,283	$	16,615	$	45,813
Capital expenditures, not yet paid	$	30,682	$	8,188	$	6,428
Non-cash extinguishment of senior notes	$	—	$	20,009	$	—
Non-cash acquisitions and related deferred taxes	$	—	$	—	$	110,273
Non-cash Silvertip contingent consideration	$	5,295	$	5,973	$	—
Other cash flow information:
Interest paid	$	20,634	$	24,428	$	22,916
Income taxes paid	$	35,600	$	33,700	$	50,400