Consolidated Statements of Changes in 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, 2016	$ 651	$ 2,179,781		$ 48,584	$ 56,869	$ 2,285,885
Balance (in shares) at Jun. 30, 2016	65,093,950
Increase (Decrease) in Stockholders' Equity
Stock-based compensation and related share issuances	$ 1	8,533				8,534
Stock-based compensation and related share issuances (in shares)	85,577
Non-controlling interest assignment		(2,518)				(2,518)
Net income (loss)				101,530	(9,105)	92,425
Other comprehensive income (loss)			$ 879			879
Distributions to non-controlling interests					(2,877)	(2,877)
Dividends declared				(62,064)		(62,064)
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