Summary Of Significant Accounting Policies (Narrative) (Details) - USD ($) $ in Thousands	9 Months Ended
	Mar. 31, 2019	Sep. 30, 2018
Summary Of Significant Accounting Policies [Line Items]
Cumulative effect adjustment to retained earnings and reduction prepaid taxes		$ (188,798)
Minimum [Member]
Summary Of Significant Accounting Policies [Line Items]
Deferred revenue recognized over a period of	1 year
Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Deferred revenue recognized over a period of	5 years