REVENUE - Property Disaggregation (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Disaggregation of Revenue
Total revenue	$ 174,096	$ 144,042	$ 322,999	$ 314,434
Stream interest
Disaggregation of Revenue
Total revenue	122,952	106,015	225,481	221,005
Stream interest | Mount Milligan
Disaggregation of Revenue
Total revenue	52,139	41,208	87,134	87,863
Stream interest | Pueblo Viejo
Disaggregation of Revenue
Total revenue	19,801	23,540	37,562	45,898
Stream interest | Andacollo
Disaggregation of Revenue
Total revenue	10,608	7,823	22,297	20,757
Stream interest | Khoemacau
Disaggregation of Revenue
Total revenue	8,394	8,881	16,152	18,035
Stream interest | Other
Disaggregation of Revenue
Total revenue	32,010	24,563	62,336	48,452
Royalty revenue:
Disaggregation of Revenue
Total revenue	51,144	38,027	97,518	93,429
Royalty revenue: | Other
Disaggregation of Revenue
Total revenue	24,103	14,097	43,472	35,772
Royalty revenue: | Cortez Legacy Zone
Disaggregation of Revenue
Total revenue	11,214	14,305	24,579	37,393
Royalty revenue: | Cortez CC Zone
Disaggregation of Revenue
Total revenue	4,548	3,520	8,959	6,726
Royalty revenue: | Peñasquito
Disaggregation of Revenue
Total revenue	$ 11,279	$ 6,105	$ 20,508	$ 13,538