Consolidated Statements of Changes in Equity (USD $) In Thousands, except Share data, unless otherwise specified	Total	Common Shares	Exchangeable Shares	Additional Paid-In Capital	Accumulated Other Comprehensive Income (Loss)	Accumulated Earnings	Treasury Stock	Non-controlling interests
Balance at Jun. 30, 2009	$ 760,411	$ 405		$ 702,407	$ (80)	$ 46,709		$ 10,970
Balance (in shares) at Jun. 30, 2009		40,480,311
Issuance of common stock for:
Equity offering	276,218	60		276,158
Equity offering (in shares)		5,980,000
Acquisition of International Royalty Corporation	329,586	52	79,511	230,236			(917)	20,704
Acquisition of International Royalty Corporation (in shares)		5,234,086	1,806,649				22,245
Andacollo Royalty acquisition	53,428	12		53,416
Andacollo Royalty acquisition (in shares)		1,204,136
Exchange of exchangeable shares		2	(7,770)	7,768
Exchange of exchangeable shares (in shares)		176,540	(176,540)
Stock-based compensation and related share issuances	10,548	3		14,102			(3,557)
Stock-based compensation and related share issuances (in shares)		249,098					74,430
Net income	29,422					21,492		7,930
Comprehensive income (loss)	46				46
Distribution to non-controlling interests	(9,772)							(9,772)
Dividends declared	(16,339)					(16,339)
Balance at Jun. 30, 2010	1,433,548	534	71,741	1,284,087	(34)	51,862	(4,474)	29,832
Balance (in shares) at Jun. 30, 2010		53,324,171	1,630,109				96,675
Issuance of common stock for:
Exchange of exchangeable shares		6	(31,877)	31,871
Exchange of exchangeable shares (in shares)		724,314	(724,314)
Retirement of treasury stock	(29)	(1)		(4,502)			4,474
Retirement of treasury stock (in shares)		(22,245)					(96,675)
Stock-based compensation and related share issuances	8,245	4		8,241
Stock-based compensation and related share issuances (in shares)		205,547
Net income	77,299					71,395		5,904
Comprehensive income (loss)	88				88
Distribution to non-controlling interests	(8,203)							(8,203)
Dividends declared	(23,253)					(23,253)
Balance at Jun. 30, 2011	1,487,695	543	39,864	1,319,697	54	100,004		27,533
Balance (in shares) at Jun. 30, 2011		54,231,787	905,795
Issuance of common stock for:
Equity offering	267,433	40		267,393
Equity offering (in shares)		4,000,000
Exchange of exchangeable shares		1	(4,708)	4,707
Exchange of exchangeable shares (in shares)		106,969	(106,969)
2019 convertible senior notes, net of tax	47,605			47,605
Stock-based compensation and related share issuances	16,957	2		16,955
Stock-based compensation and related share issuances (in shares)		275,465
Net income	98,309					92,476		5,833
Comprehensive income (loss)	(13,817)				(13,817)
Distribution to non-controlling interests	(8,396)							(8,396)
Dividends declared	(32,357)					(32,357)
Balance at Jun. 30, 2012	$ 1,863,429	$ 586	$ 35,156	$ 1,656,357	$ (13,763)	$ 160,123		$ 24,970
Balance (in shares) at Jun. 30, 2012		58,614,221	798,826