Summary Of Significant Accounting Policies (Deferred Revenue) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013
Deferred Revenue Arrangement [Line Items]
Deferred revenue	$ 382,544	$ 336,913
Deferred Maintenance Revenue [Member]
Deferred Revenue Arrangement [Line Items]
Deferred revenue	335,827	312,721
Deferred Other Service Revenue [Member]
Deferred Revenue Arrangement [Line Items]
Deferred revenue	19,775	18,793
Deferred License Revenue [Member]
Deferred Revenue Arrangement [Line Items]
Deferred revenue	$ 26,942	$ 5,399