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Investments (Details) - USD ($)
$ / shares in Units, $ in Thousands
1 Months Ended 3 Months Ended
Jan. 31, 2023
Mar. 31, 2023
Mar. 31, 2022
Mar. 31, 2021
Dec. 31, 2022
Debt Securities, Available-for-sale [Abstract]          
Marketable Securities, Realized Gain (Loss)   $ (2,800)   $ (13,700)  
Investment in Marketable Securities (Textual) [Abstract]          
Current liabilities   0     $ 12,120
Marketable Securities, Current   14,938     32,032
Equity securities         44,152
Equity securities          
Investment in Marketable Securities (Textual) [Abstract]          
Cost   25,408     95,968
Equity Securities, FV-NI, Unrealized Gain (Loss)   0 $ 0    
Equity Securities, FV-NI, Unrealized Gain   10,470 51,816    
Marketable Securities, Current   14,938      
Victoria Gold Corp | Equity securities          
Investment in Marketable Securities (Textual) [Abstract]          
Cost         70,560
Equity Securities, FV-NI, Unrealized Gain (Loss)     0    
Equity Securities, FV-NI, Unrealized Gain     38,528    
Marketable Securities, Current         32,032
Equity method investment, amount sold (in shares) 6,000,000        
Equity Method Investments, Sale of Stock, Price Per Share $ 6.70        
Proceeds from sale of equity method investments $ 39,800        
Integra Resources Corp. [Member] | Equity securities          
Investment in Marketable Securities (Textual) [Abstract]          
Cost   9,455     9,455
Equity Securities, FV-NI, Unrealized Gain (Loss)   0 0    
Equity Securities, FV-NI, Unrealized Gain   7,472 7,115    
Current liabilities         2,340
Marketable Securities, Current   1,983      
Avino Silver & Gold Mines Ltd | Equity securities          
Investment in Marketable Securities (Textual) [Abstract]          
Cost   13,720     13,720
Equity Securities, FV-NI, Unrealized Gain (Loss)   0 0    
Equity Securities, FV-NI, Unrealized Gain   1,260 4,199    
Current liabilities         9,521
Marketable Securities, Current   12,460      
Other Investments [Member] | Equity securities          
Investment in Marketable Securities (Textual) [Abstract]          
Cost   2,233     2,233
Equity Securities, FV-NI, Unrealized Gain (Loss)   0 0    
Equity Securities, FV-NI, Unrealized Gain   1,738 $ 1,974    
Current liabilities         $ 259
Marketable Securities, Current   $ 495