Composition Of Certain Financial Statement Captions (Schedule Of Accrued Liabilities) (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Sep. 30, 2016
Composition Of Certain Financial Statement Captions [Abstract]
Accrued royalties	$ 1,962	$ 1,939
Amounts payable to patent administration program partners	51,105	34,472
Accrued compensation and benefits	71,822	71,261
Accrued professional fees	5,685	6,528
Capital expenditures incurred, but not yet paid	6,359	17,100
Other accrued liabilities	40,052	37,755
Total	$ 176,985	$ 169,055