Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Operating activities:
Net loss	$ (91,581)	$ (2,870)
Non-cash elements included in net loss:
Depreciation, depletion and amortization	143,040	108,814
Gain on disposition of investments	(927)	0
Unrealized loss on investments	1,159	2,461
Adjustment of inventory to market value	1,399	7,232
Loss (gain) on disposition of properties, plants, equipment, and mineral interests	4,666	(3,374)
Provision for reclamation and closure costs	5,298	3,957
Stock compensation	4,758	4,672
Deferred income taxes	(26,616)	(4,637)
Amortization of loan origination fees	1,919	1,471
Loss (gain) on derivative contracts	5,824	(15,208)
Foreign exchange loss (gain)	6,263	(2,032)
Other non-cash items, net	0	(37)
Change in assets and liabilities, net of business acquisitions:
Accounts receivable	(10,215)	(4,424)
Inventories	(6,501)	(18,954)
Other current and non-current assets	14,913	(5,569)
Accounts payable and accrued liabilities	5,616	12,308
Accrued payroll and related benefits	4,506	(4,207)
Accrued taxes	(5,733)	845
Accrued reclamation and closure costs and other non-current liabilities	5,821	(5,238)
Cash provided by operating activities	63,609	75,210
Investing activities:
Additions to properties, plants, equipment and mineral interests	(97,338)	(83,285)
Acquisition of Klondex, net of cash and restricted cash acquired	0	(139,326)
Proceeds from sale of investments	1,760	0
Proceeds from disposition of properties, plants, equipment and mineral interests	86	722
Insurance proceeds received for damaged property	0	4,377
Purchases of investments	(389)	(31,971)
Maturities of investments	0	64,895
Net cash used in investing activities	(95,881)	(184,588)
Financing activities:
Proceeds from sale of common stock, net of offering costs	0	3,085
Acquisition of treasury shares	(2,239)	(2,694)
Dividends paid to common shareholders	(3,655)	(3,193)
Dividends paid to preferred shareholders	(414)	(414)
Credit availability and debt issuance fees	(587)	(2,460)
Borrowings on debt	245,000	78,024
Repayments of debt	(195,000)	(82,036)
Repayments of finance leases	(5,484)	(5,992)
Net cash provided by (used in) financing activities	37,621	(15,680)
Effect of exchange rates on cash	257	(215)
Net increase (decrease) in cash, cash equivalents and restricted cash and cash equivalents	5,606	(125,273)
Cash, cash equivalents and restricted cash and cash equivalents at beginning of period	28,414	187,139
Cash, cash equivalents and restricted cash and cash equivalents at end of period	34,020	61,866
Significant non-cash investing and financing activities:
Addition of finance lease obligations	6,506	7,008
Recognition of operating lease liabilities and right-of-use assets	22,365	0
Common stock issued for the acquisition of other companies	0	252,544
Payment of accrued compensation in stock	8,274	4,863
Marketable equity securities received for sale of mineral interest	$ 2,257	$ 0