Consolidated Statements of Changes in Stockholder's Equity - USD ($) $ in Thousands	Common Shares	Additional Paid-In Capital	Accumulated Other Comprehensive Income (Loss)	Accumulated (Losses) Earnings	Noncontrolling Interests	Total
Balance at Jun. 30, 2017	$ 652	$ 2,185,796	$ 879	$ 88,050	$ 44,887	$ 2,320,264
Balance (in shares) at Jun. 30, 2017	65,179,527
Increase (Decrease) in Stockholders' Equity
Stock-based compensation and related share issuances	$ 2	4,236				4,238
Stock-based compensation and related share issuances (in shares)	180,514
Distributions from (to) non-controlling interests		2,580			432	3,012
Net income (loss)				(113,134)	(6,217)	(119,351)
Other comprehensive income (loss)			(2,080)			(2,080)
Dividends declared				(64,814)		(64,814)
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