Condensed Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands	Total	Preferred Stock	Common Stock	Capital Surplus	Accumulated Deficit	Accumulated Other Comprehensive Income (Loss), net	Treasury Stock
Balance at Dec. 31, 2020	$ 1,713,785	$ 39	$ 134,629	$ 2,003,576	$ (368,074)	$ (32,889)	$ (23,496)
Net (loss) income	23,220	0	0	0	23,220	0	0
Common stock issued for 401(k) match	3,455	0	131	3,324	0	0	0
Restricted stock units granted	2,930	0	0	2,930	0	0	0
Restricted stock unit distributions	(4,525)	0	413	(413)	0	0	(4,525)
Common stock dividends declared	(16,755)	0	0	0	(16,755)	0	0
Series B Preferred Stock dividends declared	(414)	0	0	0	(414)	0	0
Common stock issued to directors	1,844	0	52	1,792	0	0	0
Common stock issued to pension plans	22,250	0	1,125	21,125	0	0	0
Other comprehensive income (loss)	(2,815)	0	0	0	0	(2,815)	0
Balance at Sep. 30, 2021	1,742,975	39	136,350	2,032,334	(362,023)	(35,704)	(28,021)
Balance at Jun. 30, 2021	1,748,425	39	136,065	2,024,645	(354,866)	(29,437)	(28,021)
Net (loss) income	(979)	0	0	0	(979)	0	0
Common stock issued for 401(k) match	1,052	0	35	1,017	0	0	0
Restricted stock units granted	1,472	0	0	1,472	0	0	0
Common stock dividends declared	(6,040)	0	0	0	(6,040)	0	0
Series B Preferred Stock dividends declared	(138)	0	0	0	(138)	0	0
Common stock issued to pension plans	5,450	0	250	5,200	0	0	0
Other comprehensive income (loss)	(6,267)	0	0	0	0	(6,267)	0
Balance at Sep. 30, 2021	1,742,975	39	136,350	2,032,334	(362,023)	(35,704)	(28,021)
Balance at Dec. 31, 2021	1,760,787	39	136,391	2,034,485	(353,651)	(28,456)	(28,021)
Net (loss) income	(32,896)	0	0	0	(32,896)	0	0
Common stock issued to Alexco Resource Corp. shareholders	68,733	0	4,498	64,235	0	0	0
Common stock issued to settle the acquired silver stream	135,000	0	8,700	126,300	0	0	0
Common stock issued for 401(k) match	3,469	0	186	3,283	0	0	0
Common stock issued under ATM program, net	4,542	0	294	4,248	0	0	0
Restricted stock units granted	3,881	0	0	3,881	0	0	0
Restricted stock unit distributions	(3,677)	0	447	(447)	0	0	(3,677)
Common stock dividends declared	(10,135)	0	0	0	(10,135)	0	0
Series B Preferred Stock dividends declared	(414)	0	0	0	(414)	0	0
Common stock issued to directors	417	0	25	392	0	0	0
Common stock issued to pension plans	5,570	0	298	5,272	0	0	0
Other comprehensive income (loss)	19,491	0	0	0	0	19,491	0
Balance at Sep. 30, 2022	1,954,768	39	150,839	2,241,649	(397,096)	(8,965)	(31,698)
Balance at Jun. 30, 2022	1,782,882	39	137,241	2,043,621	(370,048)	3,727	(31,698)
Net (loss) income	(23,526)	0	0	0	(23,526)	0	0
Common stock issued to Alexco Resource Corp. shareholders	68,733	0	4,498	64,235	0	0	0
Common stock issued to settle the acquired silver stream	135,000	0	8,700	126,300	0	0	0
Common stock issued for 401(k) match	1,578	0	106	1,472	0	0	0
Common stock issued under ATM program, net	4,542	0	294	4,248	0	0	0
Restricted stock units granted	1,773	0	0	1,773	0	0	0
Common stock dividends declared	(3,384)	0	0	0	(3,384)	0	0
Series B Preferred Stock dividends declared	(138)	0	0	0	(138)	0	0
Other comprehensive income (loss)	(12,692)	0	0	0	0	(12,692)	0
Balance at Sep. 30, 2022	$ 1,954,768	$ 39	$ 150,839	$ 2,241,649	$ (397,096)	$ (8,965)	$ (31,698)