REVENUE - Metal Disaggregation (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Disaggregation of Revenue
Total revenue	$ 193,837	$ 138,617	$ 516,835	$ 453,051
Stream interest
Disaggregation of Revenue
Total revenue	133,052	98,978	358,531	319,982
Stream interest | Gold
Disaggregation of Revenue
Total revenue	100,126	72,540	270,000	231,396
Stream interest | Silver
Disaggregation of Revenue
Total revenue	20,026	14,419	51,653	51,958
Stream interest | Copper
Disaggregation of Revenue
Total revenue	12,900	12,019	36,878	36,628
Royalty revenue:
Disaggregation of Revenue
Total revenue	60,785	39,639	158,304	133,069
Royalty revenue: | Gold
Disaggregation of Revenue
Total revenue	46,837	35,993	117,504	109,030
Royalty revenue: | Silver
Disaggregation of Revenue
Total revenue	3,674	441	12,981	6,108
Royalty revenue: | Copper
Disaggregation of Revenue
Total revenue	4,808	1,524	12,077	8,154
Royalty revenue: | Other
Disaggregation of Revenue
Total revenue	$ 5,466	$ 1,681	$ 15,742	$ 9,777