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Additional Comprehensive Income (Loss) Detail (Tables)
 3 Months Ended
Mar. 31, 2024
Other Income and Expenses [Abstract]  
Schedule of Other Operating Cost and Expense, by Component
Pre-development, reclamation, and other consists of the following:
 Three Months Ended March 31,
In thousands20242023
Silvertip ongoing carrying costs2,362 6,180 
(Gain) loss on sale of assets3,536 — 
Asset retirement accretion4,076 3,993 
Kensington royalty settlement(1)
6,750 — 
Other1,504 717 
Pre-development, reclamation and other$18,228 $10,890 
(1) See Note 16 -- Commitments and Contingencies for additional details on Kensington royalty settlement.
Schedule of Nonoperating Income (Expense)
Other, net consists of the following:
 Three Months Ended March 31,
In thousands20242023
Foreign exchange gain (loss)$(365)$(1,154)
Gain (loss) on dispositions— (9)
Flow-through shares2,490 — 
Other648 202 
Other, net$2,773 $(961)