Accumulated Other Comprehensive Loss (Change In Accumulated Other Comprehensive (Loss) Income Per Component) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020		Dec. 31, 2019
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	$ (161,245)	$ (211,179)	$ (169,075)	[1]	$ (195,812)
Movement in foreign currency translation reserve related to equity-accounted investment	0	(491)	1,688		2,227
Movement in foreign currency translation reserve	20,003	19,114	26,145		1,029
Ending Balance	(141,242)	(190,978)	(141,242)		(190,978)
FIHRST [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Release of foreign currency translation reserve related to disposal (Note 2)		1,578			1,578
Accumulated Foreign Currency Translation Reserve [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(161,245)	(211,179)	(169,075)		(195,812)
Movement in foreign currency translation reserve related to equity-accounted investment		(491)	1,688		2,227
Movement in foreign currency translation reserve	20,003	19,114	26,145		1,029
Ending Balance	$ (141,242)	(190,978)	$ (141,242)		(190,978)
Accumulated Foreign Currency Translation Reserve [Member] | FIHRST [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Release of foreign currency translation reserve related to disposal (Note 2)		$ 1,578			$ 1,578

[1] Derived from audited financial statements.