EARNINGS PER SHARE ("EPS") (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014	Mar. 31, 2013
EARNINGS PER SHARE ("EPS")
Net income available to Royal Gold common stockholders (in dollars)	$ 20,143	$ 6,464	$ 46,004	$ 58,450
Weighted-average shares for basic EPS	64,963,605	64,837,598	64,895,464	62,723,061
Effect of other dilutive securities (in shares)	119,175	156,919	117,437	194,393
Weighted-average shares for diluted EPS	65,082,780	64,994,517	65,012,901	62,917,454
Basic earnings per share (in dollars per share)	$ 0.31	$ 0.10	$ 0.71	$ 0.93
Diluted earnings per share (in dollars per share)	$ 0.31	$ 0.10	$ 0.71	$ 0.93
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		$ 105