Business Segment Information (Schedule Of Identifiable Assets) (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Sep. 30, 2015
Identifiable Assets	$ 978,371	$ 864,208
Filtration [Member]
Identifiable Assets	143,500	127,000
Test [Member]
Identifiable Assets	110,900	117,800
USG [Member]
Identifiable Assets	85,400	80,600
Technical Packaging [Member]
Identifiable Assets	40,900	14,800
Corporate [Member]
Identifiable Assets	$ 597,700	$ 524,000