OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) (USD $)	3 Months Ended
	Sep. 30, 2014 item	Jun. 30, 2014
Minimum number of metals produced from a mine of which right to purchase all or a portion available in exchange for upfront deposit	1
Carrying value	$ 2,091,323,000	$ 2,109,067,000
Impairment of mining assets	1,769,000
Impaired mining asset
Carrying value	0
Impairment of mining assets	1,800,000
Production Stage Royalty Interest
Carrying value	672,120,000	686,857,000
Production Stage Royalty Interest | Impaired mining asset
Number of properties	1
Exploration Stage Royalty Interest
Carrying value	166,708,000	164,209,000
Exploration Stage Royalty Interest | Impaired mining asset
Number of properties	$ 1