REVENUE - Property Disaggregation (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Disaggregation of Revenue
Total revenue	$ 193,436	$ 148,902
Stream interest
Disaggregation of Revenue
Total revenue	122,482	102,528
Stream interest | Mount Milligan
Disaggregation of Revenue
Total revenue	42,808	34,995
Stream interest | Pueblo Viejo
Disaggregation of Revenue
Total revenue	28,751	17,760
Stream interest | Andacollo
Disaggregation of Revenue
Total revenue	12,744	11,689
Stream interest | Other
Disaggregation of Revenue
Total revenue	38,179	38,084
Royalty revenue:
Disaggregation of Revenue
Total revenue	70,954	46,374
Royalty revenue: | Other
Disaggregation of Revenue
Total revenue	56,257	28,598
Royalty revenue: | Cortez Legacy Zone
Disaggregation of Revenue
Total revenue	11,143	13,365
Royalty revenue: | Cortez CC Zone
Disaggregation of Revenue
Total revenue	$ 3,554	$ 4,411