REVENUE - Metal 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 | Gold
Disaggregation of Revenue
Total revenue	78,277	78,629
Stream interest | Silver
Disaggregation of Revenue
Total revenue	14,747	18,308
Stream interest | Copper
Disaggregation of Revenue
Total revenue	9,504	18,053
Royalty interest
Disaggregation of Revenue
Total revenue	46,374	55,402
Royalty interest | Gold
Disaggregation of Revenue
Total revenue	33,496	42,868
Royalty interest | Silver
Disaggregation of Revenue
Total revenue	4,328	2,946
Royalty interest | Copper
Disaggregation of Revenue
Total revenue	3,621	5,058
Royalty interest | Other
Disaggregation of Revenue
Total revenue	$ 4,929	$ 4,530