REVENUE - Property Disaggregation (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Disaggregation of Revenue
Total revenue	$ 148,902	$ 170,392
Stream interest
Disaggregation of Revenue
Total revenue	102,528	114,990
Stream interest | Mount Milligan
Disaggregation of Revenue
Total revenue	34,995	46,656
Stream interest | Pueblo Viejo
Disaggregation of Revenue
Total revenue	17,760	22,358
Stream interest | Andacollo
Disaggregation of Revenue
Total revenue	11,689	12,934
Stream interest | Khoemacau
Disaggregation of Revenue
Total revenue	7,758	9,153
Stream interest | Other
Disaggregation of Revenue
Total revenue	30,326	23,889
Royalty interest
Disaggregation of Revenue
Total revenue	46,374	55,402
Royalty interest | Other
Disaggregation of Revenue
Total revenue	19,369	21,676
Royalty interest | Cortez Legacy Zone
Disaggregation of Revenue
Total revenue	13,365	23,087
Royalty interest | Cortez CC Zone
Disaggregation of Revenue
Total revenue	4,411	3,206
Royalty interest | Peñasquito
Disaggregation of Revenue
Total revenue	$ 9,229	$ 7,433