ROYALTY AND STREAM INTERESTS, NET (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013
Royalty and stream interests, net
Cost	$ 2,551,727	$ 2,471,707
Accumulated Depletion	(442,660)	(351,439)
Net	2,109,067	2,120,268
Production stage royalty interests
Royalty and stream interests, net
Cost	1,121,776	1,108,833
Accumulated Depletion	(434,919)	(351,439)
Net	686,857	757,394
Production stage royalty interests | Andacollo
Royalty and stream interests, net
Cost	272,998	272,998
Accumulated Depletion	(56,147)	(44,317)
Net	216,851	228,681
Production stage royalty interests | Voisey's Bay
Royalty and stream interests, net
Cost	150,138	150,138
Accumulated Depletion	(67,377)	(51,881)
Net	82,761	98,257
Production stage royalty interests | Penasquito
Royalty and stream interests, net
Cost	99,172	99,172
Accumulated Depletion	(17,801)	(12,393)
Net	81,371	86,779
Production stage royalty interests | Las Cruces
Royalty and stream interests, net
Cost	57,230	57,230
Accumulated Depletion	(16,917)	(11,713)
Net	40,313	45,517
Production stage royalty interests | Dolores
Royalty and stream interests, net
Cost	55,820	44,878
Accumulated Depletion	(11,109)	(8,186)
Net	44,711	36,692
Production stage royalty interests | Mulatos
Royalty and stream interests, net
Cost	48,092	48,092
Accumulated Depletion	(28,548)	(24,545)
Net	19,544	23,547
Production stage royalty interests | Wolverine
Royalty and stream interests, net
Cost	45,158	45,158
Accumulated Depletion	(12,689)	(7,891)
Net	32,469	37,267
Production stage royalty interests | Canadian Malartic
Royalty and stream interests, net
Cost	38,800	38,800
Accumulated Depletion	(10,038)	(6,320)
Net	28,762	32,480
Production stage royalty interests | Holt
Royalty and stream interests, net
Cost	34,612	34,612
Accumulated Depletion	(10,474)	(6,564)
Net	24,138	28,048
Production stage royalty interests | Gwalia Deeps
Royalty and stream interests, net
Cost	31,070	31,070
Accumulated Depletion	(10,549)	(7,194)
Net	20,521	23,876
Production stage royalty interests | Inata
Royalty and stream interests, net
Cost	24,871	24,871
Accumulated Depletion	(12,161)	(9,303)
Net	12,710	15,568
Production stage royalty interests | Ruby Hill
Royalty and stream interests, net
Cost	24,335	24,335
Accumulated Depletion	(13,403)	(3,054)
Net	10,932	21,281
Production stage royalty interests | Leeville
Royalty and stream interests, net
Cost	18,322	18,322
Accumulated Depletion	(15,917)	(15,484)
Net	2,405	2,838
Production stage royalty interests | Robinson
Royalty and stream interests, net
Cost	17,825	17,825
Accumulated Depletion	(11,887)	(11,224)
Net	5,938	6,601
Production stage royalty interests | Cortez
Royalty and stream interests, net
Cost	10,630	10,630
Accumulated Depletion	(9,772)	(9,716)
Net	858	914
Production stage royalty interests | Other
Royalty and stream interests, net
Cost	192,703	190,702
Accumulated Depletion	(130,130)	(121,654)
Net	62,573	69,048
Production stage stream interests | Mt. Milligan
Royalty and stream interests, net
Cost	783,046
Accumulated Depletion	(7,741)
Net	775,305
Production stage royalty and stream interests
Royalty and stream interests, net
Cost	1,904,822
Accumulated Depletion	(442,660)
Net	1,462,162
Development stage royalty interests | Pascua-Lama
Royalty and stream interests, net
Cost	372,105	372,105
Net	372,105	372,105
Development stage royalty interests | El Morro
Royalty and stream interests, net
Cost	35,139
Net	35,139
Development stage royalty interests | Other
Royalty and stream interests, net
Cost	34,349	32,934
Net	34,349	32,934
Development stage stream interests | Mt. Milligan
Royalty and stream interests, net
Cost		770,093
Net		770,093
Development stage stream interests | Phoenix Gold Project
Royalty and stream interests, net
Cost	30,620
Net	30,620
Development stage stream interests | Other
Royalty and stream interests, net
Cost	10,483	10,418
Net	10,483	10,418
Development stage royalty and stream interests
Royalty and stream interests, net
Cost	482,696	1,185,550
Net	482,696	1,185,550
Exploration stage royalty interests
Royalty and stream interests, net
Cost	164,209	177,324
Net	$ 164,209	$ 177,324