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

6 Months Ended

Jun. 30, 2018

Supplemental Cash Flow Information [Abstract]

Schedule of Accrued Liabilities [Table Text Block]

Accrued liabilities and other consist of the following:

In thousands	June 30, 2018		December 31, 2017
Accrued salaries and wages	$	16,745	$	26,559
Income and mining taxes	2,649		25,788
Silvertip contingent consideration	24,694		24,393
Accrued operating costs	12,290		12,323
Taxes other than income and mining	3,741		4,354
Accrued interest payable	1,545		1,513
Accrued liabilities and other	$	61,664	$	94,930

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

he following table provides a reconciliation of cash, cash equivalents, and restricted cash reported within the statement of financial position that sum to the total of the same such amounts shown in the statement of cash flows for the three and six months ended June 30, 2018 and 2017:

In thousands	June 30, 2018		June 30, 2017
Cash and cash equivalents	$	123,539	$	200,979
Restricted cash equivalents	12,487		9,830
Total cash, cash equivalents and restricted cash shown in the statement of cash flows	136,026		210,809