Consolidated Statements of Changes in Equity - USD ($) $ in Thousands	Common Shares	Additional Paid-in Capital	Accumulated Other Comprehensive Income (Loss)	Accumulated (Losses) Earnings	Noncontrolling Interest	Total
Balance at Jun. 30, 2018	$ 654	$ 2,192,612	$ (1,201)	$ (89,898)	$ 39,102	$ 2,141,269
Balance (in shares) at Jun. 30, 2018	65,360,041
Increase (Decrease) in Stockholders' Equity
Stock-based compensation and related share issuances	$ 1	5,021				5,022
Stock-based compensation and related share issuances (in shares)	80,451
Distributions from (to) non-controlling interests		4,140			(584)	3,556
Net income (loss)				93,825	(4,746)	89,079
Other comprehensive income (loss)			$ 1,201	(1,201)
Dividends declared				(68,473)		(68,473)
Balance at Jun. 30, 2019	$ 655	2,201,773		(65,747)	33,772	2,170,453
Balance (in shares) at Jun. 30, 2019	65,440,492
Increase (Decrease) in Stockholders' Equity
Stock-based compensation and related share issuances		4,936				4,936
Stock-based compensation and related share issuances (in shares)	90,796
Distributions from (to) non-controlling interests		3,720			(777)	2,943
Net income (loss)				199,343	(3,093)	196,250
Dividends declared				(72,463)		(72,463)
Balance at Jun. 30, 2020	$ 655	2,210,429		61,133	29,902	2,302,119
Balance (in shares) at Jun. 30, 2020	65,531,288
Increase (Decrease) in Stockholders' Equity
Stock-based compensation and related share issuances	$ 1	4,263				4,264
Stock-based compensation and related share issuances (in shares)	19,773
Sale of Peak Gold JV interest		(10,829)			(16,218)	(27,047)
Distributions to non-controlling interests					(1,281)	(1,281)
Net income (loss)				302,532	244	302,776
Dividends declared				(77,416)		(77,416)
Balance at Jun. 30, 2021	$ 656	2,203,863		286,249	12,647	2,503,415
Balance (in shares) at Jun. 30, 2021	65,551,061
Increase (Decrease) in Stockholders' Equity
Stock-based compensation and related share issuances		2,296				2,296
Stock-based compensation and related share issuances (in shares)	13,303
Distributions to non-controlling interests					(669)	(669)
Net income (loss)				138,339	489	138,828
Dividends declared				(42,659)		(42,659)
Balance at Dec. 31, 2021	$ 656	$ 2,206,159		$ 381,929	$ 12,467	$ 2,601,211
Balance (in shares) at Dec. 31, 2021	65,564,364