ROYALTY AND STREAM INTERESTS (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Jun. 30, 2014
Royalty and stream interests
Cost	$ 2,555,786	$ 2,551,727
Accumulated Depletion	(464,463)	(442,660)
Net	2,091,323	2,109,067
Production Stage Royalty Interest
Royalty and stream interests
Cost	1,123,156	1,121,776
Accumulated Depletion	(451,036)	(434,919)
Net	672,120	686,857
Production Stage Royalty Interest | Andacollo
Royalty and stream interests
Cost	272,998	272,998
Accumulated Depletion	(58,569)	(56,147)
Net	214,429	216,851
Production Stage Royalty Interest | Voiseys Bay
Royalty and stream interests
Cost	150,138	150,138
Accumulated Depletion	(70,012)	(67,377)
Net	80,126	82,761
Production Stage Royalty Interest | Penasquito
Royalty and stream interests
Cost	99,172	99,172
Accumulated Depletion	(19,377)	(17,801)
Net	79,795	81,371
Production Stage Royalty Interest | Mulatos
Royalty and stream interests
Cost	48,092	48,092
Accumulated Depletion	(29,305)	(28,548)
Net	18,787	19,544
Production Stage Royalty Interest | Holt
Royalty and stream interests
Cost	34,612	34,612
Accumulated Depletion	(11,344)	(10,474)
Net	23,268	24,138
Production Stage Royalty Interest | Robinson
Royalty and stream interests
Cost	17,825	17,825
Accumulated Depletion	(12,119)	(11,887)
Net	5,706	5,938
Production Stage Royalty Interest | Cortez
Royalty and stream interests
Cost	10,630	10,630
Accumulated Depletion	(9,805)	(9,772)
Net	825	858
Production Stage Royalty Interest | Other Mines
Royalty and stream interests
Cost	489,689	488,309
Accumulated Depletion	(240,505)	(232,913)
Net	249,184	255,396
Production Stage Stream Interests | Mt. Milligan
Royalty and stream interests
Cost	783,046	783,046
Accumulated Depletion	(13,427)	(7,741)
Net	769,619	775,305
Production Stage Royalty and Stream Interests
Royalty and stream interests
Cost	1,906,202	1,904,822
Accumulated Depletion	(464,463)	(442,660)
Net	1,441,739	1,462,162
Development Stage Royalty Interest
Royalty and stream interests
Cost	441,594	441,593
Net	441,594	441,593
Development Stage Royalty Interest | Pascua Lama
Royalty and stream interests
Cost	372,105	372,105
Net	372,105	372,105
Development Stage Royalty Interest | Other Mines
Royalty and stream interests
Cost	69,489	69,488
Net	69,489	69,488
Development Stage Stream Interest
Royalty and stream interests
Cost	41,282
Net	41,282
Development Stage Stream Interest | Phoenix Gold Project
Royalty and stream interests
Cost		30,620
Net		30,620
Development Stage Stream Interest | Other Mines
Royalty and stream interests
Cost		10,483
Net		10,483
Development Stage Royalty and Stream Interest
Royalty and stream interests
Cost	482,876	41,103
Net	482,876	41,103
Exploration Stage Royalty Interest
Royalty and stream interests
Cost	166,708	164,209
Net	$ 166,708	$ 164,209