REVENUE - Metal 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 | Gold
Disaggregation of Revenue
Total revenue	91,597	80,227	169,874	158,856
Stream interest | Silver
Disaggregation of Revenue
Total revenue	16,880	19,230	31,628	37,539
Stream interest | Copper
Disaggregation of Revenue
Total revenue	14,475	6,558	23,979	24,610
Royalty revenue:
Disaggregation of Revenue
Total revenue	51,144	38,027	97,518	93,429
Royalty revenue: | Gold
Disaggregation of Revenue
Total revenue	37,171	30,169	70,667	73,037
Royalty revenue: | Silver
Disaggregation of Revenue
Total revenue	4,978	2,721	9,307	5,667
Royalty revenue: | Copper
Disaggregation of Revenue
Total revenue	3,648	1,572	7,269	6,630
Royalty revenue: | Other
Disaggregation of Revenue
Total revenue	$ 5,347	$ 3,565	$ 10,275	$ 8,095