GOODWILL AND OTHER INTANGIBLE ASSETS (Schedule Of Intangible Assets Gross Carrying Amounts And Accumulated Amortization) (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Sep. 30, 2016
Goodwill and Other Intangible Assets [Line Items]
Goodwill	$ 353,984	$ 323,616
Less: accumulated amortization	64,380	56,955
Patents [Member]
Goodwill and Other Intangible Assets [Line Items]
Gross carrying amount	931	917
Less: accumulated amortization	751	726
Net	180	191
Capitalized Software [Member]
Goodwill and Other Intangible Assets [Line Items]
Gross carrying amount	57,451	54,003
Less: accumulated amortization	30,301	26,737
Net	27,150	27,266
Customer relationships [Member]
Goodwill and Other Intangible Assets [Line Items]
Gross carrying amount	144,287	111,887
Less: accumulated amortization	32,244	28,633
Net	112,043	83,254
Other [Member]
Goodwill and Other Intangible Assets [Line Items]
Gross carrying amount	3,178	2,777
Less: accumulated amortization	1,084	859
Net	2,094	1,918
Trade names [Member]
Goodwill and Other Intangible Assets [Line Items]
Trade names	$ 123,807	$ 119,128