ROYALTY AND STREAM INTERESTS, NET (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Jun. 30, 2013
Royalty and stream interests
Cost	$ 2,519,735	$ 2,471,707
Accumulated Depletion	(373,806)	(351,439)
Net	2,145,929	2,120,268
Production stage royalty interests
Royalty and stream interests
Cost	1,108,833	1,108,833
Accumulated Depletion	(373,806)	(351,439)
Net	735,027	757,394
Production stage royalty interests | Andacollo
Royalty and stream interests
Cost	272,998	272,998
Accumulated Depletion	(48,479)	(44,317)
Net	224,519	228,681
Production stage royalty interests | Voisey's Bay
Royalty and stream interests
Cost	150,138	150,138
Accumulated Depletion	(56,285)	(51,881)
Net	93,853	98,257
Production stage royalty interests | Penasquito
Royalty and stream interests
Cost	99,172	99,172
Accumulated Depletion	(13,372)	(12,393)
Net	85,800	86,779
Production stage royalty interests | Las Cruces
Royalty and stream interests
Cost	57,230	57,230
Accumulated Depletion	(13,065)	(11,713)
Net	44,165	45,517
Production stage royalty interests | Mulatos
Royalty and stream interests
Cost	48,092	48,092
Accumulated Depletion	(25,658)	(24,545)
Net	22,434	23,547
Production stage royalty interests | Wolverine
Royalty and stream interests
Cost	45,158	45,158
Accumulated Depletion	(9,079)	(7,891)
Net	36,079	37,267
Production stage royalty interests | Dolores
Royalty and stream interests
Cost	44,878	44,878
Accumulated Depletion	(8,883)	(8,186)
Net	35,995	36,692
Production stage royalty interests | Canadian Malartic
Royalty and stream interests
Cost	38,800	38,800
Accumulated Depletion	(7,190)	(6,320)
Net	31,610	32,480
Production stage royalty interests | Holt
Royalty and stream interests
Cost	34,612	34,612
Accumulated Depletion	(7,681)	(6,564)
Net	26,931	28,048
Production stage royalty interests | Gwalia Deeps
Royalty and stream interests
Cost	31,070	31,070
Accumulated Depletion	(7,967)	(7,194)
Net	23,103	23,876
Production stage royalty interests | Inata
Royalty and stream interests
Cost	24,871	24,871
Accumulated Depletion	(10,036)	(9,303)
Net	14,835	15,568
Production stage royalty interests | Ruby Hill
Royalty and stream interests
Cost	24,335	24,335
Accumulated Depletion	(5,826)	(3,054)
Net	18,509	21,281
Production stage royalty interests | Leeville
Royalty and stream interests
Cost	18,322	18,322
Accumulated Depletion	(15,586)	(15,484)
Net	2,736	2,838
Production stage royalty interests | Robinson
Royalty and stream interests
Cost	17,825	17,825
Accumulated Depletion	(11,403)	(11,224)
Net	6,422	6,601
Production stage royalty interests | Cortez
Royalty and stream interests
Cost	10,630	10,630
Accumulated Depletion	(9,718)	(9,716)
Net	912	914
Production stage royalty interests | Other
Royalty and stream interests
Cost	190,702	190,702
Accumulated Depletion	(123,578)	(121,654)
Net	67,124	69,048
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	35,074
Net	35,074
Development stage royalty interests | Other
Royalty and stream interests
Cost	32,935	32,934
Net	32,935	32,934
Development stage stream interests | Mt. Milligan
Royalty and stream interests
Cost	783,046	770,093
Net	783,046	770,093
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	1,233,578	1,185,550
Net	1,233,578	1,185,550
Exploration stage royalty interests
Royalty and stream interests
Cost	177,324	177,324
Net	$ 177,324	$ 177,324