SEGMENT INFORMATION (Details)	3 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Jun. 30, 2013
Chile
Geographic distribution of royalty revenue and long-lived assets (royalty interests in mineral properties, net)
Revenue (as a percent)	31.00%	26.00%
Royalty and stream interests, net (as a percent)	31.00%		30.00%
Canada
Geographic distribution of royalty revenue and long-lived assets (royalty interests in mineral properties, net)
Revenue (as a percent)	26.00%	23.00%
Royalty and stream interests, net (as a percent)	52.00%		52.00%
Mexico
Geographic distribution of royalty revenue and long-lived assets (royalty interests in mineral properties, net)
Revenue (as a percent)	18.00%	22.00%
Royalty and stream interests, net (as a percent)	7.00%		7.00%
United States
Geographic distribution of royalty revenue and long-lived assets (royalty interests in mineral properties, net)
Revenue (as a percent)	13.00%	17.00%
Royalty and stream interests, net (as a percent)	4.00%		4.00%
Australia
Geographic distribution of royalty revenue and long-lived assets (royalty interests in mineral properties, net)
Revenue (as a percent)	4.00%	3.00%
Royalty and stream interests, net (as a percent)	3.00%		3.00%
Africa
Geographic distribution of royalty revenue and long-lived assets (royalty interests in mineral properties, net)
Revenue (as a percent)	3.00%	3.00%
Royalty and stream interests, net (as a percent)	1.00%		1.00%
Other
Geographic distribution of royalty revenue and long-lived assets (royalty interests in mineral properties, net)
Revenue (as a percent)	5.00%	6.00%
Royalty and stream interests, net (as a percent)	2.00%		3.00%