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Business Segment Information (Schedule Of Depreciation And Amortization) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Sep. 30, 2015 | Sep. 30, 2014 | Sep. 30, 2013
Depreciation and Amortization | $ 18,584 | $ 16,362 | $ 14,805
Filtration [Member] |  |  |
Depreciation and Amortization | 5,200 | 5,200 | 4,200
Test [Member] |  |  |
Depreciation and Amortization | 3,100 | 2,700 | 2,500
USG [Member] |  |  |
Depreciation and Amortization | 6,200 | 4,800 | 4,600
Corporate [Member] |  |  |
Depreciation and Amortization | $ 4,100 | $ 3,700 | $ 3,500

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- Definition The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585 + Details
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Period Type: | duration

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- Details
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- Details
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- Details
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- Details
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