ACQUISITION (Details) (USD $)	9 Months Ended		0 Months Ended	3 Months Ended	0 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Oct. 20, 2014 item	Mar. 31, 2015	Jan. 08, 2015	Sep. 30, 2014
Acquisition of Royalty Interest in Mineral Properties
Cash paid for acquisition of royalty interests	$ 60,341,000	$ 79,692,000
Peak Gold | Royal Alaska
Acquisition of Royalty Interest in Mineral Properties
Fair value of non-controlling interest	45,700,000			45,700,000
Ilovitza | RGLD Gold AG
Acquisition of Royalty Interest in Mineral Properties
Total purchase amount			175,000,000
Number of installments			2
Feasibility costs			15,000,000
Construction costs			160,000,000
Cash paid for acquisition of royalty interests				7,500,000
Ilovitza | RGLD Gold AG | First Conditions
Acquisition of Royalty Interest in Mineral Properties
Feasibility costs			7,500,000
Ilovitza | RGLD Gold AG | Second Conditions
Acquisition of Royalty Interest in Mineral Properties
Feasibility costs			7,500,000
Ilovitza | RGLD Gold AG | Initial Royalty
Acquisition of Royalty Interest in Mineral Properties
Percentage of royalty interests acquired			25.00%
Gold delivered (in ounces)			525,000
Ilovitza | RGLD Gold AG | Subsequent Royalty
Acquisition of Royalty Interest in Mineral Properties
Percentage of royalty interests acquired			12.50%
Purchase price per ounce of gold as percentage of spot price at the time of delivery			25.00%
Tetlin
Acquisition of Royalty Interest in Mineral Properties
Total purchase amount						6,000,000
Tetlin | NSR Royalty 1
Acquisition of Royalty Interest in Mineral Properties
Percentage of royalty interests acquired						2.00%
Tetlin | NSR Royalty 2
Acquisition of Royalty Interest in Mineral Properties
Percentage of royalty interests acquired						3.00%
Tetlin | Peak Gold | Royal Alaska
Acquisition of Royalty Interest in Mineral Properties
Payments to acquire interest in joint venture					5,000,000
Minimum percentage of membership interest required to be manager				40.00%
Tetlin | Peak Gold | Royal Alaska | Maximum
Acquisition of Royalty Interest in Mineral Properties
Percentage of membership interest that can be obtained					40.00%
Amount that can be contributed to purchase membership interest					$ 30,000,000
Tetlin | Peak Gold | Contango
Acquisition of Royalty Interest in Mineral Properties
Membership interest controlled					100.00%