STREAM AND ROYALTY INTERESTS, NET - Summary (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Mar. 14, 2022	Dec. 31, 2021
Cost	$ 3,937,708		$ 3,899,867
Accumulated Depletion	(1,547,844)		(1,456,115)
Net	2,389,864		2,443,752
Production stage stream and royalty interests
Cost	3,395,450		3,369,499
Accumulated Depletion	(1,547,844)		(1,456,115)
Net	1,847,606		1,913,384
Production stage stream interests
Cost	2,446,435		2,419,936
Accumulated Depletion	(953,071)		(878,902)
Net	1,493,364		1,541,034
Production stage stream interests | Mt. Milligan
Cost	790,635		790,635
Accumulated Depletion	(369,245)		(336,921)
Net	421,390		453,714
Production stage stream interests | Pueblo Viejo
Cost	610,404		610,405
Accumulated Depletion	(274,189)		(260,321)
Net	336,215		350,084
Production stage stream interests | Andacollo
Cost	388,182		388,182
Accumulated Depletion	(146,235)		(139,035)
Net	241,947		249,147
Production stage stream interests | Khoemacau
Cost	265,911	$ 265,000	239,411
Accumulated Depletion	(8,055)		(3,402)
Net	257,856		236,009
Production stage stream interests | Rainy River
Cost	175,727		175,727
Accumulated Depletion	(56,351)		(50,115)
Net	119,376		125,612
Production stage stream interests | Wassa
Cost	146,475		146,475
Accumulated Depletion	(90,625)		(84,915)
Net	55,850		61,560
Production stage stream interests | Other.
Cost	69,101		69,101
Accumulated Depletion	(8,371)		(4,193)
Net	60,730		64,908
Production stage royalty interests
Cost	949,015		949,563
Accumulated Depletion	(594,773)		(577,213)
Net	354,242		372,350
Production stage royalty interests | Voisey's Bay
Cost	205,724		205,724
Accumulated Depletion	(116,383)		(113,602)
Net	89,341		92,122
Production stage royalty interests | Red Chris
Cost	116,187		116,187
Accumulated Depletion	(1,797)
Net	114,390		116,187
Production stage royalty interests | Penasquito
Cost	99,172		99,172
Accumulated Depletion	(55,399)		(53,022)
Net	43,773		46,150
Production stage royalty interests | Cortez
Cost	80,681		80,681
Accumulated Depletion	(28,232)		(23,225)
Net	52,449		57,456
Production stage royalty interests | Other.
Cost	447,251		447,799
Accumulated Depletion	(392,962)		(387,364)
Net	54,289		60,435
Development stage stream and royalty interests
Cost	120,255		112,213
Net	120,255		112,213
Development stage stream interests | Other.
Cost	12,038		12,037
Net	12,038		12,037
Development stage royalty interests | Cote
Cost	45,421		45,421
Net	45,421		45,421
Development stage royalty interests | Other.
Cost	62,796		54,755
Net	62,796		54,755
Exploration stage stream and royalty interests
Cost	422,003		418,155
Net	422,003		418,155
Exploration stage stream interests | NX Gold
Cost			30,974
Net			30,974
Exploration stage royalty interests | Pascua - Lama
Cost	177,690		177,690
Net	177,690		177,690
Exploration stage royalty interests | Red Chris
Cost	48,895		48,895
Net	48,895		48,895
Exploration stage royalty interests | Cote
Cost	29,610		29,610
Net	29,610		29,610
Exploration stage royalty interests | NX Gold
Cost	34,253
Net	34,253
Exploration stage royalty interests | Other.
Cost	131,555		130,986
Net	$ 131,555		$ 130,986