EARNINGS PER SHARE ("EPS") (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
EARNINGS PER SHARE ("EPS")
Net income available to Royal Gold common stockholders (in dollars)	$ 18,680	$ 15,195
Weighted-average shares for basic EPS	64,962,883	64,858,354
Effect of other dilutive securities (in shares)	144,598	122,245
Weighted-average shares for diluted EPS	65,107,481	64,980,599
Basic earnings per share (in dollars per share)	$ 0.29	$ 0.23
Diluted earnings per share (in dollars per share)	$ 0.29	$ 0.23
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
2019 Conversion Notes, Initial conversion price per share of common stock (in dollars per share)	$ 105