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, 2019	Dec. 31, 2018	Dec. 31, 2019		Dec. 31, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	$ (214,640)	$ (189,630)	$ (199,273)	[1]	$ (184,538)
Release of foreign currency translation reserve related to disposal of FIHRST (Note 2)	1,578		1,578
Movement in foreign currency translation reserve related to equity accounted investment	(491)	0	2,227		5,430
Movement in foreign currency translation reserve	19,114	(8,744)	1,029		(19,266)
Ending Balance	(194,439)	(198,374)	(194,439)		(198,374)
Accumulated Foreign Currency Translation Reserve [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(214,640)	(189,630)	(199,273)		(184,538)
Release of foreign currency translation reserve related to disposal of FIHRST (Note 2)	1,578		1,578
Movement in foreign currency translation reserve related to equity accounted investment	(491)		2,227		5,430
Movement in foreign currency translation reserve	19,114	(8,744)	1,029		(19,266)
Ending Balance	$ (194,439)	$ (198,374)	$ (194,439)		$ (198,374)

[1] Derived from audited financial statements.