Description Of Business And Basis Of Presentation (Narrative) (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		12 Months Ended
	Mar. 31, 2019	Jun. 30, 2019		Jun. 30, 2019		Jun. 30, 2020	Dec. 31, 2019	Jun. 30, 2018	Jun. 30, 2017
Error Corrections And Prior Period Adjustments Restatement [Line Items]
Accumulated other comprehensive loss		$ (195,812)	[1]	$ (195,812)	[1]	$ (169,075)	$ (169,075)	$ (184,350)	$ (162,736)
Discontinued Operations [Member]
Error Corrections And Prior Period Adjustments Restatement [Line Items]
Release of foreign currency translation reserve related to disposal of DNI				5,679
Accumulated other comprehensive loss		(195,812)		(195,812)
Discontinued Operations [Member] | DNI [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 of DNI	$ 4,000
Discontinued Operations [Member] | Restatement Adjustment [Member] | DNI [Member]
Error Corrections And Prior Period Adjustments Restatement [Line Items]
Accumulated other comprehensive loss		$ 3,200		$ 3,200

[1] Refer to Note 1