Goodwill and Other Intangible Assets (Schedule Of Intangible Assets Gross Carrying Amounts And Accumulated Amortization) (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013
Goodwill and Other Intangible Assets [Line Items]
Goodwill	$ 291,157	$ 282,337	$ 282,900
Patents [Member]
Goodwill and Other Intangible Assets [Line Items]
Gross carrying amount	1,000	1,000
Less: accumulated amortization	800	800
Net	200	200
Capitalized Software [Member]
Goodwill and Other Intangible Assets [Line Items]
Gross carrying amount	45,500	37,400
Less: accumulated amortization	20,100	15,200
Net	25,400	22,200
Customer Relationships [Member]
Goodwill and Other Intangible Assets [Line Items]
Gross carrying amount	70,500	64,100
Less: accumulated amortization	24,700	21,200
Net	45,800	42,900
Other Intangible Assets [Member]
Goodwill and Other Intangible Assets [Line Items]
Gross carrying amount	2,600	400
Less: accumulated amortization	400	200
Net	2,200	200
Trade names
Goodwill and Other Intangible Assets [Line Items]
Trade names	$ 117,100	$ 116,600