GOODWILL AND OTHER INTANGIBLE ASSETS (Schedule Of Changes In The Carrying Amount Of Goodwill Attributable To Business Segment) (Details) $ in Thousands	9 Months Ended
	Jun. 30, 2017 USD ($)
Goodwill [Line Items]
Goodwill, Beginning Balance	$ 323,616
Acquisition activity	42,400
Foreign currency translation and other	0
Goodwill, Ending Balance	365,965
Utility Solutions [Member]
Goodwill [Line Items]
Goodwill, Beginning Balance	226,200
Acquisition activity	12,300
Foreign currency translation and other	200
Goodwill, Ending Balance	238,700
Test [Member]
Goodwill [Line Items]
Goodwill, Beginning Balance	34,100
Acquisition activity	0
Foreign currency translation and other	0
Goodwill, Ending Balance	34,100
Filtration [Member]
Goodwill [Line Items]
Goodwill, Beginning Balance	43,900
Acquisition activity	30,100
Foreign currency translation and other	(500)
Goodwill, Ending Balance	73,500
Technical Packaging [Member]
Goodwill [Line Items]
Goodwill, Beginning Balance	19,400
Acquisition activity	0
Foreign currency translation and other	300
Goodwill, Ending Balance	$ 19,700