GOODWILL AND OTHER INTANGIBLE ASSETS (Schedule Of Intangible Assets Gross Carrying Amounts And Accumulated Amortization) (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Sep. 30, 2017
Goodwill and Other Intangible Assets [Line Items]
Goodwill	$ 382,141	$ 377,879
Less: accumulated amortization	82,889	73,879
Patents [Member]
Goodwill and Other Intangible Assets [Line Items]
Gross carrying amount	972	928
Less: accumulated amortization	764	750
Net	208	178
Capitalized Software [Member]
Goodwill and Other Intangible Assets [Line Items]
Gross carrying amount	66,349	63,007
Less: accumulated amortization	37,910	34,382
Net	28,439	28,625
Customer relationships [Member]
Goodwill and Other Intangible Assets [Line Items]
Gross carrying amount	186,002	181,891
Less: accumulated amortization	42,490	37,364
Net	143,512	144,527
Other [Member]
Goodwill and Other Intangible Assets [Line Items]
Gross carrying amount	5,276	5,373
Less: accumulated amortization	1,725	1,383
Net	3,551	3,990
Trade names [Member]
Goodwill and Other Intangible Assets [Line Items]
Trade names	$ 173,921	$ 173,813