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Goodwill and Other Intangible Assets (Schedule Of Changes In The Carrying Amount Of Goodwill Attributable To Business Segment) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Sep. 30, 2015 | Sep. 30, 2014
Goodwill [Line Items] |  |
Goodwill, Beginning Balance | $ 282,337 | $ 282,900
Adjustments | 8,900 | (600)
Goodwill, Ending Balance | 291,157 | 282,337
Utility Solutions [Member] |  |
Goodwill [Line Items] |  |
Goodwill, Beginning Balance | 216,800 | 217,300
Adjustments | 9,400 | (500)
Goodwill, Ending Balance | 226,200 | 216,800
Test [Member] |  |
Goodwill [Line Items] |  |
Goodwill, Beginning Balance | 34,700 | 35,000
Adjustments | (500) | (300)
Goodwill, Ending Balance | 34,200 | 34,700
Filtration [Member] |  |
Goodwill [Line Items] |  |
Goodwill, Beginning Balance | 30,800 | 30,600
Adjustments | 0 | 200
Goodwill, Ending Balance | $ 30,800 | $ 30,800

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- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Amount of increase (decrease) of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
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- Details
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- Details
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