GOODWILL AND OTHER INTANGIBLE ASSETS (Schedule Of Intangible Assets Gross Carrying Amounts And Accumulated Amortization) (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Sep. 30, 2018
Goodwill and Other Intangible Assets [Line Items]
Goodwill	$ 381,304	$ 381,652
Less: accumulated amortization	101,546	92,274
Patents [Member]
Goodwill and Other Intangible Assets [Line Items]
Gross carrying amount	1,866	1,833
Less: accumulated amortization	846	791
Net	1,020	1,042
Capitalized software [Member]
Goodwill and Other Intangible Assets [Line Items]
Gross carrying amount	75,789	71,294
Less: accumulated amortization	45,304	41,624
Net	30,485	29,670
Customer relationships [Member]
Goodwill and Other Intangible Assets [Line Items]
Gross carrying amount	184,924	185,333
Less: accumulated amortization	53,030	47,802
Net	131,894	137,531
Other [Member]
Goodwill and Other Intangible Assets [Line Items]
Gross carrying amount	5,303	5,468
Less: accumulated amortization	2,365	2,056
Net	2,938	3,412
Trade names [Member]
Goodwill and Other Intangible Assets [Line Items]
Trade names	$ 172,177	$ 173,698