SEGMENT INFORMATION (Details)	3 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Jun. 30, 2014
CANADA
Geographic distribution of royalty revenue and long-lived assets (royalty interests in mineral properties, net)
Revenue (as a percent)	45.00%	26.00%
Royalty and stream interests, net (as a percent)	53.00%		53.00%
CHILE
Geographic distribution of royalty revenue and long-lived assets (royalty interests in mineral properties, net)
Revenue (as a percent)	16.00%	31.00%
Royalty and stream interests, net (as a percent)	32.00%		31.00%
UNITED STATES
Geographic distribution of royalty revenue and long-lived assets (royalty interests in mineral properties, net)
Revenue (as a percent)	16.00%	13.00%
Royalty and stream interests, net (as a percent)	3.00%		3.00%
MEXICO
Geographic distribution of royalty revenue and long-lived assets (royalty interests in mineral properties, net)
Revenue (as a percent)	14.00%	18.00%
Royalty and stream interests, net (as a percent)	7.00%		7.00%
AUSTRALIA
Geographic distribution of royalty revenue and long-lived assets (royalty interests in mineral properties, net)
Revenue (as a percent)	3.00%	4.00%
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)	2.00%	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)	4.00%	5.00%
Royalty and stream interests, net (as a percent)	1.00%		2.00%