REVENUE - Property Disaggregation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Disaggregation of Revenue
Revenue	$ 719,395	$ 605,717	$ 603,206
Stream interest
Disaggregation of Revenue
Revenue	483,294	418,280	417,793
Stream interest | Mt. Milligan
Disaggregation of Revenue
Revenue	186,039	158,167	180,543
Stream interest | Pueblo Viejo
Disaggregation of Revenue
Revenue	83,059	76,247	85,863
Stream interest | Andacollo
Disaggregation of Revenue
Revenue	47,531	48,920	47,347
Stream interest | Other interest
Disaggregation of Revenue
Revenue	166,665	134,946	104,040
Royalty interest
Disaggregation of Revenue
Revenue	236,101	187,437	185,413
Royalty interest | Cortez Legacy Zone
Disaggregation of Revenue
Revenue	58,183	79,920	47,769
Royalty interest | Cortez CC Zone
Disaggregation of Revenue
Revenue	11,611	14,626	2,790
Royalty interest | Other interest
Disaggregation of Revenue
Revenue	$ 166,307	$ 92,891	$ 134,854