Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Operating activities:
Net income	$ 4,153	$ 21,451
Non-cash elements included in net income:
Depreciation, depletion and amortization	35,456	46,957
Provision for reclamation and closure costs	1,643	4,529
Stock-based compensation expense	1,271	500
Deferred taxes	2,234	141
Fair value adjustments, net	(2,245)	(8,623)
Foreign exchange loss	2,280	1,755
Other non-cash items, net	483	556
Change in assets and liabilities:
Accounts receivable	2,779	(2,664)
Inventories	(5,081)	2,120
Other current and non-current assets	1,696	1,528
Accounts payable and accrued liabilities	(13,907)	(24,545)
Accrued payroll and related benefits	6,909	(7,995)
Accrued taxes	3,754	2,031
Accrued reclamation and closure costs and other non-current liabilities	(3,516)	195
Cash provided by operating activities	37,909	37,936
Investing activities:
Additions to properties, plants, equipment and mineral interests	(21,478)	(21,413)
Proceeds from sale of investments	2,487	0
Proceeds from disposition of properties, plants and equipment	617	19
Purchases of investments	(10,868)	0
Net cash used in investing activities	29,242	21,394
Financing activities:
Acquisition of treasury shares	(1,921)	0
Dividends paid to common and preferred stockholders	(3,509)	(4,826)
Credit facility fees paid	(54)	(82)
Repayments of finance leases	(1,695)	(1,881)
Net cash used in financing activities	(7,179)	(6,789)
Effect of exchange rates on cash	519	167
Net increase in cash, cash equivalents and restricted cash and cash equivalents	2,007	9,920
Cash, cash equivalents and restricted cash and cash equivalents at beginning of period	211,063	130,883
Cash, cash equivalents and restricted cash and cash equivalents at end of period	213,070	140,803
Supplemental disclosure of cash flow information:
Cash paid for interest	18,603	18,406
Cash paid for income and mining taxes	679	1,980
Significant non-cash investing and financing activities:
Addition of finance lease obligations and right-of-use assets	2,864	3,120
Accounts receivable for proceeds on exchange of investments	$ 0	$ 1,832