Income Taxes (Summary Of Valuation Allowance) (Details) - USD ($) $ in Thousands		12 Months Ended
		Sep. 30, 2016		Sep. 30, 2015		Sep. 30, 2014
Movement in Valuation Allowances and Reserves [Roll Forward]
Valuation allowance beginning of year		$ 198,168	[1]	$ 177,500		$ 156,500
Net release of valuation allowance	[2]	(3,100)		(18,700)		(18,100)
Net increase in deferred tax assets for foreign jurisdictions with a full valuation allowance		39,800		39,400		14,100
Establish valuation allowance for acquired businesses		0		0		21,500
Establish valuation allowance in foreign jurisdictions		600		0		3,500
Valuation allowance end of year		$ 235,503	[1]	$ 198,168	[1]	$ 177,500

[1] (1) See Note B. Recent Accounting Pronouncements-Deferred Taxes regarding a change in the balance sheet classification of our deferred taxes.

[2] In 2016, this is attributable to the release in two foreign jurisdictions. In 2015, this is attributable to a reduction in deferred tax assets associated with our U.S. pension plan, both of which are described above and in 2014 the recognition of deferred tax liabilities recorded in connection with accounting for acquisitions.