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Business Segment Information (Schedule Of Capital Expenditures) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2016
Capital Expenditures | $ 20,589 | $ 29,728 | $ 13,843
Filtration [Member] |  |  |
Capital Expenditures | 7,000 | 10,200 | 3,300
Test [Member] |  |  |
Capital Expenditures | 3,000 | 4,500 | 3,300
USG [Member] |  |  |
Capital Expenditures | 5,200 | 7,600 | 3,300
Technical Packaging [Member] |  |  |
Capital Expenditures | 5,400 | 7,400 | 3,900
Corporate [Member] |  |  |
Capital Expenditures | $ 0 | $ 0 | $ 0

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- Definition The cash outflow for purchases of and capital improvements on property, plant and equipment (capital expenditures), software, and other intangible assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3213-108585 + Details
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