GOODWILL AND OTHER INTANGIBLE ASSETS (Schedule Of Intangible Assets Gross Carrying Amounts And Accumulated Amortization) (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Sep. 30, 2017
Goodwill and Other Intangible Assets [Line Items]
Goodwill	$ 381,420	$ 377,879
Less: accumulated amortization	87,494	73,879
Patents [Member]
Goodwill and Other Intangible Assets [Line Items]
Gross carrying amount	973	928
Less: accumulated amortization	773	750
Net	200	178
Capitalized software [Member]
Goodwill and Other Intangible Assets [Line Items]
Gross carrying amount	68,876	63,007
Less: accumulated amortization	39,757	34,382
Net	29,119	28,625
Customer relationships [Member]
Goodwill and Other Intangible Assets [Line Items]
Gross carrying amount	185,055	181,891
Less: accumulated amortization	45,066	37,364
Net	139,989	144,527
Other [Member]
Goodwill and Other Intangible Assets [Line Items]
Gross carrying amount	5,316	5,373
Less: accumulated amortization	1,899	1,383
Net	3,417	3,990
Trade names [Member]
Goodwill and Other Intangible Assets [Line Items]
Trade names	$ 173,149	$ 173,813