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Business Segment Information (Schedule Of Net Sales And Earnings Before Income Tax) (Details) - USD ($) $ in Thousands |  |  | 1 Months Ended | 3 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | ---
Mar. 14, 2018 | May 08, 2017 | Aug. 30, 2017 | May 25, 2017 | Nov. 07, 2016 | Sep. 02, 2016 | Jan. 29, 2016 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2016 | Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2016
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
NET SALES | $ 8,000 | $ 45,000 | $ 14,000 | $ 25,000 | $ 40,000 | $ 25,000 | $ 35,000 | $ 231,086 | $ 192,223 | $ 174,778 | $ 173,495 | $ 207,005 | $ 171,189 | $ 161,178 | $ 146,368 | $ 771,582 | $ 685,740 | $ 571,459
Consolidated EBIT |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 96,800 | 84,700 | 69,700
Less: interest expense |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (8,748) | (4,578) | (1,308)
Earnings before income tax |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 88,023 | 80,153 | 68,420
Filtration [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
NET SALES |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 286,800 | 279,500 | 207,800
Consolidated EBIT |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 58,700 | 52,200 | 45,200
Test [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
NET SALES |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 182,900 | 160,900 | 161,500
Consolidated EBIT |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 23,800 | 19,500 | 13,900
USG [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
NET SALES |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 214,000 | 162,400 | 127,800
Consolidated EBIT |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 43,200 | 36,600 | 31,100
Technical Packaging [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
NET SALES |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 87,900 | 82,900 | 74,400
Consolidated EBIT |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 8,100 | 8,500 | 9,600
Reconciliation to consolidated totals (Corporate) [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidated EBIT |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ (37,000) | $ (32,100) | $ (30,100)

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- Definition Amount of income (loss) from continuing operations before deduction of income tax expense (benefit) and income (loss) attributable to noncontrolling interest, and addition of income (loss) from equity method investments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)(1)(i)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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- Definition Amount of income (loss) from continuing operations, nonoperating income (expense) and income (loss) from equity method investments, before deduction of income tax expense (benefit) and income (loss) attributable to noncontrolling interest, and addition of interest income (expense). + References No definition available. + Details
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