v3.25.2
Acquisitions and Other Transactions - Financing Package with Discovery Silver Corp. on the Porcupine Complex- Ontario, Canada (Details)
$ / shares in Units, $ / shares in Units, $ in Millions, $ in Millions
 3 Months Ended 6 Months Ended
Apr. 16, 2025
Apr. 15, 2025
USD ($)
tranche
oz
$ / shares
shares
Jun. 30, 2024
USD ($)
Jun. 30, 2025
USD ($)
Jun. 30, 2024
USD ($)
Apr. 15, 2025
$ / shares
Feb. 03, 2025
USD ($)
item
Feb. 03, 2025
CAD ($)
item
$ / shares
Acquisitions                
Amount advances     $ 42.3   $ 83.5      
Discovery Term Loan                
Acquisitions                
Percentage of net smelter return to be acquired   4.25%            
Purchase price   $ 300.0            
Number of subscription receipts acquired | item             78,833,333 78,833,333
Value of common shared issued in acquisition             $ 48.6 $ 70.9
Discovery Term Loan | SOFR                
Acquisitions                
Notional amount   $ 100.0            
Discovery Silver Corp. on the Porcupine Complex Canada                
Acquisitions                
Number of subscription receipts acquired | item             78,833,333 78,833,333
Value of common shared issued in acquisition             $ 48.6 $ 70.9
Number of tranches | tranche   2            
Percentage of net smelter return on all minerals produced indefinitely   2.25%            
Percentage of net smelter return based on threshold ounces or threshold internal rate of return   2.00%            
Threshold gold ounces used in determining the percentage of net smelter return | oz   72,000            
Threshold internal rate of return on purchase price used in determining the percentage of net smelter return   12.00%            
Threshold purchase price used to calculate the threshold internal rate of return for determining the percentage of   $ 100.0            
Total subscription offerings             $ 169.5 $ 247.5
Subscription receipt price | $ / shares               $ 0.9
Lockup period 2 years              
Discovery Silver Corp. on the Porcupine Complex Canada | SOFR                
Acquisitions                
Notional amount   $ 100.0            
Loan receivable term   7 years            
Loan availability term   2 years            
Adjustment to interest rate basis   4.50%            
Amortization percentage per quarter   5.00%            
Upfront fee percentage on principal drawn   2.00%            
Standby fee on undrawn funds   1.00%            
Discovery Silver Corp. on the Porcupine Complex Canada | Discovery Term Loan                
Acquisitions                
Number of common share purchase warrants | shares   3,900,000            
Amount advances       $ 0.0        
Exercise price of warrants per common share | (per share)   $ 0.95       $ 0.95    
Discovery Silver Corp. on the Porcupine Complex Canada | Discovery Term Loan | SOFR                
Acquisitions                
Amortization beginning period   5 years