STREAM AND ROYALTY INTERESTS, NET - Summary (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Mar. 14, 2022	Dec. 31, 2021
Cost	$ 4,669,574		$ 3,899,867
Accumulated Depletion	(1,585,194)		(1,456,115)
Net	3,084,380		2,443,752
Rainy River
Cost			175,727
Accumulated Depletion			(50,115)
Net			125,612
Production stage stream and royalty interests
Cost	3,594,982		3,369,499
Accumulated Depletion	(1,585,194)		(1,456,115)
Net	2,009,788		1,913,384
Production stage stream interests
Cost	2,446,434		2,419,936
Accumulated Depletion	(985,647)		(878,902)
Net	1,460,787		1,541,034
Production stage stream interests | Mt. Milligan
Cost	790,635		790,635
Accumulated Depletion	(379,708)		(336,921)
Net	410,927		453,714
Production stage stream interests | Pueblo Viejo
Cost	610,404		610,405
Accumulated Depletion	(281,730)		(260,321)
Net	328,674		350,084
Production stage stream interests | Andacollo
Cost	388,182		388,182
Accumulated Depletion	(149,586)		(139,035)
Net	238,596		249,147
Production stage stream interests | Khoemacau
Cost	265,911	$ 265,000	239,411
Accumulated Depletion	(11,621)		(3,402)
Net	254,290		236,009
Production stage stream interests | Rainy River
Cost	175,727
Accumulated Depletion	(58,328)
Net	117,399
Production stage stream interests | Wassa
Cost	146,475		146,475
Accumulated Depletion	(93,474)		(84,915)
Net	53,001		61,560
Production stage stream interests | Other.
Cost	69,100		69,101
Accumulated Depletion	(11,200)		(4,193)
Net	57,900		64,908
Production stage royalty interests
Cost	1,148,548		949,563
Accumulated Depletion	(599,547)		(577,213)
Net	549,001		372,350
Production stage royalty interests | Voisey's Bay
Cost	205,724		205,724
Accumulated Depletion	(117,228)		(113,602)
Net	88,496		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
Accumulated Depletion	(56,529)
Net	42,643
Production stage royalty interests | Cortez
Cost	280,219		80,681
Accumulated Depletion	(28,352)		(23,225)
Net	251,867		57,456
Production stage royalty interests | Other.
Cost	447,246		447,799
Accumulated Depletion	(395,641)		(387,364)
Net	51,605		60,435
Development stage stream and royalty interests
Cost	130,692		112,213
Net	130,692		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 | Penasquito
Cost			99,172
Accumulated Depletion			(53,022)
Net			46,150
Development stage royalty interests | Other.
Cost	73,233		54,755
Net	73,233		54,755
Exploration stage stream and royalty interests
Cost	943,900		418,155
Net	943,900		418,155
Exploration stage stream interests | NX Gold
Cost	34,253		30,974
Net	34,253		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 | Cortez
Cost	325,654
Net	325,654
Exploration stage royalty interests | Great Bear
Cost	206,965
Net	206,965
Exploration stage royalty interests | Other.
Cost	120,833		130,986
Net	$ 120,833		$ 130,986