ROYALTY AND STREAM INTERESTS (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Jun. 30, 2013
Royalty and stream interests
Cost	$ 2,551,400	$ 2,471,707
Accumulated Depletion	(418,025)	(351,439)
Net	2,133,375	2,120,268
Production stage royalty interests
Royalty and stream interests
Cost	1,121,776	1,108,833
Accumulated Depletion	(415,636)	(351,439)
Net	706,140	757,394
Production stage royalty interests | Andacollo
Royalty and stream interests
Cost	272,998	272,998
Accumulated Depletion	(53,933)	(44,317)
Net	219,065	228,681
Production stage royalty interests | Voisey's Bay
Royalty and stream interests
Cost	150,138	150,138
Accumulated Depletion	(64,436)	(51,881)
Net	85,702	98,257
Production stage royalty interests | Penasquito
Royalty and stream interests
Cost	99,172	99,172
Accumulated Depletion	(16,018)	(12,393)
Net	83,154	86,779
Production stage royalty interests | Las Cruces
Royalty and stream interests
Cost	57,230	57,230
Accumulated Depletion	(15,595)	(11,713)
Net	41,635	45,517
Production stage royalty interests | Dolores
Royalty and stream interests
Cost	55,820	44,878
Accumulated Depletion	(10,429)	(8,186)
Net	45,391	36,692
Production stage royalty interests | Mulatos
Royalty and stream interests
Cost	48,092	48,092
Accumulated Depletion	(27,650)	(24,545)
Net	20,442	23,547
Production stage royalty interests | Wolverine
Royalty and stream interests
Cost	45,158	45,158
Accumulated Depletion	(11,244)	(7,891)
Net	33,914	37,267
Production stage royalty interests | Canadian Malartic
Royalty and stream interests
Cost	38,800	38,800
Accumulated Depletion	(9,107)	(6,320)
Net	29,693	32,480
Production stage royalty interests | Holt
Royalty and stream interests
Cost	34,612	34,612
Accumulated Depletion	(9,559)	(6,564)
Net	25,053	28,048
Production stage royalty interests | Gwalia Deeps
Royalty and stream interests
Cost	31,070	31,070
Accumulated Depletion	(9,609)	(7,194)
Net	21,461	23,876
Production stage royalty interests | Inata
Royalty and stream interests
Cost	24,871	24,871
Accumulated Depletion	(11,431)	(9,303)
Net	13,440	15,568
Production stage royalty interests | Ruby Hill
Royalty and stream interests
Cost	24,335	24,335
Accumulated Depletion	(11,302)	(3,054)
Net	13,033	21,281
Production stage royalty interests | Leeville
Royalty and stream interests
Cost	18,322	18,322
Accumulated Depletion	(15,823)	(15,484)
Net	2,499	2,838
Production stage royalty interests | Robinson
Royalty and stream interests
Cost	17,825	17,825
Accumulated Depletion	(11,713)	(11,224)
Net	6,112	6,601
Production stage royalty interests | Cortez
Royalty and stream interests
Cost	10,630	10,630
Accumulated Depletion	(9,739)	(9,716)
Net	891	914
Production stage royalty interests | Other
Royalty and stream interests
Cost	192,703	190,702
Accumulated Depletion	(128,048)	(121,654)
Net	64,655	69,048
Production stage stream interests | Mt. Milligan
Royalty and stream interests
Cost	783,046
Accumulated Depletion	(2,389)
Net	780,657
Production stage royalty and stream interests
Royalty and stream interests
Cost	1,904,822
Accumulated Depletion	(418,025)
Net	1,486,797
Development stage royalty interests | Pascua-Lama
Royalty and stream interests
Cost	372,105	372,105
Net	372,105	372,105
Development stage royalty interests | El Morro
Royalty and stream interests
Cost	35,139
Net	35,139
Development stage royalty interests | Other
Royalty and stream interests
Cost	34,149	32,934
Net	34,149	32,934
Development stage stream interests | Mt. Milligan
Royalty and stream interests
Cost		770,093
Net		770,093
Development stage stream interests | Phoenix Gold
Royalty and stream interests
Cost	30,571
Net	30,571
Development stage stream interests | Other
Royalty and stream interests
Cost	10,418	10,418
Net	10,418	10,418
Development stage royalty and stream interests
Royalty and stream interests
Cost	482,382	1,185,550
Net	482,382	1,185,550
Exploration stage royalty interests
Royalty and stream interests
Cost	164,196	177,324
Net	$ 164,196	$ 177,324