Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Operating activities:
Net (loss) income	$ (3,173)	$ 4,153
Non-cash elements included in net (loss) income:
Depreciation, depletion and amortization	39,892	35,456
Adjustments of inventory to net realizable value	4,521	0
Fair value adjustments, net	(3,181)	(2,245)
Provision for reclamation and closure costs	1,694	1,643
Stock compensation	1,190	1,271
Deferred income taxes	558	2,234
Foreign exchange (gain) loss	(2,218)	2,280
Other non-cash items, net	186	483
Change in assets and liabilities:
Accounts receivable	15,477	2,779
Inventories	(9,239)	(5,081)
Other current and non-current assets	(9,856)	1,696
Accounts payable, accrued and other current liabilities	(9,304)	(13,907)
Accrued payroll and related benefits	4,705	6,909
Accrued taxes	2,226	3,754
Accrued reclamation and closure costs and other non-current liabilities	7,125	(3,516)
Cash provided by operating activities	40,603	37,909
Investing activities:
Additions to properties, plants, equipment and mineral interests	(54,443)	(21,478)
Proceeds from sale of investments	0	2,487
Proceeds from disposition of properties, plants and equipment	0	617
Purchases of investments	0	(10,868)
Net cash used in investing activities	(54,443)	(29,242)
Financing activities:
Proceeds from sale of common stock, net	11,885	0
Acquisition of treasury stock	(482)	(1,921)
Borrowing of debt	13,000	0
Repayment of debt	(13,000)	0
Dividends paid to common and preferred stockholders	(3,891)	(3,509)
Credit facility fees paid	0	(54)
Repayments of finance leases	(2,464)	(1,695)
Net cash provided by (used in) financing activities	5,048	(7,179)
Effect of exchange rates on cash	171	519
Net (decrease) increase in cash, cash equivalents and restricted cash	8,621	2,007
Cash, cash equivalents and restricted cash at beginning of period	105,907	211,063
Cash, cash equivalents and restricted cash at end of period	97,286	213,070
Supplemental disclosure of cash flow information:
Cash paid for interest	18,621	18,603
Cash paid for income and mining taxes, net	1,634	679
Significant non-cash investing and financing activities:
Addition of finance lease obligations and right-of-use assets	$ 850	$ 2,864