EARNINGS PER SHARE ("EPS") (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013
EARNINGS PER SHARE ("EPS")
Net (loss) income available to Royal Gold (in dollars)	$ (6,548)	$ 10,667	$ 12,134	$ 25,862
Weighted-average shares for basic EPS	65,002,307	64,897,757	64,982,595	64,878,056
Effect of other dilutive securities (in shares)		93,014	139,590	104,633
Weighted-average shares for diluted EPS	65,002,307	64,990,771	65,122,185	64,982,689
Basic (loss) earnings per share (in dollars per share)	$ (0.10)	$ 0.16	$ 0.19	$ 0.40
Diluted (loss) earnings per share (in dollars per share)	$ (0.10)	$ 0.16	$ 0.19	$ 0.40
Exchange ratio for conversion of exchangeable shares of RG Exchangeco into shares of Royal Gold common stock			1
Impact on diluted earnings per share (in dollars per share)			$ 0.00
2019 Conversion Notes, Initial conversion price per share of common stock (in dollars per share)	$ 105.31		$ 105.31