GOODWILL AND OTHER INTANGIBLE ASSETS (Schedule Of Intangible Assets Gross Carrying Amounts And Accumulated Amortization) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Sep. 30, 2018
Goodwill and Other Intangible Assets [Line Items]
Goodwill	$ 381,198	$ 381,652
Less: accumulated amortization	96,926	92,274
Patents [Member]
Goodwill and Other Intangible Assets [Line Items]
Gross carrying amount	1,833	1,833
Less: accumulated amortization	818	791
Net	1,015	1,042
Capitalized software [Member]
Goodwill and Other Intangible Assets [Line Items]
Gross carrying amount	73,355	71,294
Less: accumulated amortization	43,480	41,624
Net	29,875	29,670
Customer relationships [Member]
Goodwill and Other Intangible Assets [Line Items]
Gross carrying amount	184,915	185,333
Less: accumulated amortization	50,415	47,802
Net	134,500	137,531
Other [Member]
Goodwill and Other Intangible Assets [Line Items]
Gross carrying amount	5,368	5,468
Less: accumulated amortization	2,211	2,056
Net	3,157	3,412
Trade names [Member]
Goodwill and Other Intangible Assets [Line Items]
Trade names	$ 171,648	$ 173,698