ROYALTY AND STREAM INTERESTS (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Jun. 30, 2015
Royalty and stream interests
Cost	$ 3,530,294	$ 2,647,976
Accumulated Depletion	(533,873)	(536,029)
Impairments		(28,339)
Net	2,996,421	2,083,608
Phoenix Gold
Royalty and stream interests
Cost	75,800
Production Stage Royalty Interest
Royalty and stream interests
Cost	826,286	1,129,230
Accumulated Depletion	(461,061)	(500,834)
Impairments		(27,586)
Net	365,225	600,810
Production Stage Royalty Interest | Andacollo
Royalty and stream interests
Cost		272,998
Accumulated Depletion		(65,467)
Net		207,531
Production Stage Royalty Interest | Voisey's Bay
Royalty and stream interests
Cost	150,138	150,138
Accumulated Depletion	(82,897)	(76,141)
Net	67,241	73,997
Production Stage Royalty Interest | Penasquito
Royalty and stream interests
Cost	99,172	99,172
Accumulated Depletion	(28,334)	(24,555)
Net	70,838	74,617
Production Stage Royalty Interest | Mulatos
Royalty and stream interests
Cost		48,092
Accumulated Depletion		(32,313)
Net		15,779
Production Stage Royalty Interest | Holt
Royalty and stream interests
Cost	34,612	34,612
Accumulated Depletion	(15,656)	(13,950)
Net	18,956	20,662
Production Stage Royalty Interest | Robinson
Royalty and stream interests
Cost		17,825
Accumulated Depletion		(12,748)
Net		5,077
Production Stage Royalty Interest | Cortez
Royalty and stream interests
Cost	10,630	10,630
Accumulated Depletion	(9,970)	(9,933)
Net	660	697
Production Stage Royalty Interest | Other
Royalty and stream interests
Cost	531,734	495,763
Accumulated Depletion	(324,204)	(265,727)
Impairments		(27,586)
Net	207,530	202,450
Production Stage Stream Interests
Royalty and stream interests
Cost	1,844,135
Accumulated Depletion	(72,726)
Net	1,771,409
Production Stage Stream Interests | Andacollo
Royalty and stream interests
Cost	388,182
Accumulated Depletion	(6,514)
Net	381,668
Production Stage Stream Interests | Mt. Milligan
Royalty and stream interests
Cost	783,046	783,046
Accumulated Depletion	(55,980)	(35,195)
Net	727,066	747,851
Production Stage Stream Interests | Pueblo Viejo
Royalty and stream interests
Cost	610,400
Accumulated Depletion	(5,612)
Net	604,788
Production Stage Stream Interests | Wassa, Bogoso and Prestea
Royalty and stream interests
Cost	62,507
Accumulated Depletion	(4,620)
Net	57,887
Production Stage Royalty and Stream Interests
Royalty and stream interests
Cost	2,670,421	1,912,276
Accumulated Depletion	(533,787)	(536,029)
Impairments		(27,586)
Net	2,136,634	1,348,661
Development Stage Royalty Interest
Royalty and stream interests
Cost	447,072	439,122
Net	447,072	439,122
Development Stage Royalty Interest | Pascua Lama
Royalty and stream interests
Cost	380,657	372,105
Net	380,657	372,105
Development Stage Royalty Interest | Other
Royalty and stream interests
Cost	66,415	67,017
Net	66,415	67,017
Development Stage Stream Interest
Royalty and stream interests
Cost	188,506	84,026
Accumulated Depletion	(86)
Impairments		(603)
Net	188,420	83,423
Development Stage Stream Interest | Phoenix Gold
Royalty and stream interests
Cost		75,843
Net		75,843
Development Stage Stream Interest | Rainy River
Royalty and stream interests
Cost	100,684
Net	100,684
Development Stage Stream Interest | Other
Royalty and stream interests
Cost	87,822	8,183
Accumulated Depletion	(86)
Impairments		(603)
Net	87,736	7,580
Development Stage Royalty and Stream Interest
Royalty and stream interests
Cost	635,578	523,148
Accumulated Depletion	(86)
Impairments		(603)
Net	635,492	522,545
Exploration Stage Royalty Interest
Royalty and stream interests
Cost	210,584	212,552
Impairments		(150)
Net	210,584	$ 212,402
Exploration Stage Stream Interest Member
Royalty and stream interests
Cost	13,711
Net	$ 13,711