Summary Of Significant Accounting Policies (Deferred Revenue) (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Sep. 30, 2014
Deferred Revenue Arrangement [Line Items]
Deferred revenue	$ 386,850	$ 382,544
Deferred Support Revenue [Member]
Deferred Revenue Arrangement [Line Items]
Deferred revenue	331,793	335,827
Deferred Professional Service Revenue [Member]
Deferred Revenue Arrangement [Line Items]
Deferred revenue	12,639	16,277
Deferred License and Subscription Revenue [Member]
Deferred Revenue Arrangement [Line Items]
Deferred revenue	$ 42,418	$ 30,440