Basis Of Presentation And Summary Of Significant Accounting Policies (Schedule Of Impact Of Restatement On Consolidated Balance Sheet) (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Jun. 30, 2018		Sep. 30, 2017	Jun. 30, 2017
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Accumulated other comprehensive loss	$ (189,528)	$ (184,436)	[1]
Retained earnings	832,426	837,625	[1]
Total equity	$ 724,369	738,430	[1]	$ 606,575	$ 600,335
As Reported [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Accumulated other comprehensive loss		(159,237)
Retained earnings		812,426
Total equity		738,430
Correction [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Accumulated other comprehensive loss		(25,199)
Retained earnings		25,199
As Restated [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Accumulated other comprehensive loss		(184,436)
Retained earnings		837,625
Total equity		$ 738,430

[1] Certain amounts shown here do not correspond to the Company's 2018 financial statements and reflects an adjustment made, refer to Note 1 See Notes to Unaudited Condensed Consolidated Financial Statements