GOODWILL AND OTHER INTANGIBLE ASSETS (Schedule Of Intangible Assets Gross Carrying Amounts And Accumulated Amortization) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Sep. 30, 2016
Goodwill and Other Intangible Assets [Line Items]
Goodwill	$ 353,303	$ 323,616
Less: accumulated amortization	60,604	56,955
Patents [Member]
Goodwill and Other Intangible Assets [Line Items]
Gross carrying amount	917	917
Less: accumulated amortization	738	726
Net	179	191
Capitalized Software [Member]
Goodwill and Other Intangible Assets [Line Items]
Gross carrying amount	55,438	54,003
Less: accumulated amortization	28,504	26,737
Net	26,934	27,266
Customer Relationships [Member]
Goodwill and Other Intangible Assets [Line Items]
Gross carrying amount	144,288	111,887
Less: accumulated amortization	30,972	28,633
Net	113,316	83,254
Other [Member]
Goodwill and Other Intangible Assets [Line Items]
Gross carrying amount	3,176	2,777
Less: accumulated amortization	968	859
Net	2,208	1,918
Trade names [Member]
Goodwill and Other Intangible Assets [Line Items]
Trade names	$ 123,771	$ 119,128