Basis Of Presentation And Summary Of Significant Accounting Policies (Narrative) (Details) - USD ($) $ in Thousands	1 Months Ended		3 Months Ended				9 Months Ended
	Mar. 31, 2019		Jun. 30, 2019		Mar. 31, 2019		Mar. 31, 2019		Mar. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	[1]	Jun. 30, 2018	[1]
Error Corrections And Prior Period Adjustments Restatement [Line Items]
Accumulated other comprehensive loss	$ (200,405)	[1]	$ (196,046)	[1],[2]	$ (200,405)	[1]	$ (200,405)	[1]	$ (218,196)	$ (191,212)	$ (198,374)		$ (184,538)
DNI Discontinued Operations Presentation [Member]
Error Corrections And Prior Period Adjustments Restatement [Line Items]
Percent of disposal group sold	17.00%
Foreign currency translation reserve partial release			800
Release of foreign currency translation reserve related to disposal					(5,841)		(5,841)
DNI Discontinued Operations Presentation [Member] | Restatement Adjustment [Member]
Error Corrections And Prior Period Adjustments Restatement [Line Items]
Release of foreign currency translation reserve related to disposal					$ (4,035)		$ (4,035)
Accumulated other comprehensive loss			$ 3,227

[1] Refer to Note 1

[2] Derived from audited financial statements.