REVENUE - Metal Disaggregation (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Disaggregation of Revenue
Revenue	$ 144,042	$ 146,441	$ 314,434	$ 308,796
Stream interests
Disaggregation of Revenue
Revenue	106,015	104,879	221,005	210,130
Stream interests | Gold
Disaggregation of Revenue
Revenue	80,227	75,325	158,856	152,827
Stream interests | Silver
Disaggregation of Revenue
Revenue	19,230	12,892	37,539	24,331
Stream interests | Copper
Disaggregation of Revenue
Revenue	6,558	16,662	24,610	32,972
Royalty interests
Disaggregation of Revenue
Revenue	38,027	41,562	93,429	98,666
Royalty interests | Gold
Disaggregation of Revenue
Revenue	30,169	28,974	73,037	66,890
Royalty interests | Silver
Disaggregation of Revenue
Revenue	2,721	3,512	5,667	7,829
Royalty interests | Copper
Disaggregation of Revenue
Revenue	1,572	3,281	6,630	9,986
Royalty interests | Other
Disaggregation of Revenue
Revenue	$ 3,565	$ 5,795	$ 8,095	$ 13,961