BUSINESS SEGMENT INFORMATION (Schedule Of Net Sales And Earnings Before Income Tax) (Details) - USD ($) $ in Thousands	3 Months Ended
Dec. 31, 2016	Dec. 31, 2015
Segment Reporting Information [Line Items]
Net sales	$ 146,368	$ 132,833
Consolidated EBIT	16,809	13,197
Less: Interest expense	(684)	(229)
Earnings before income taxes	16,125	12,968
Filtration [Member]
Segment Reporting Information [Line Items]
Net sales	58,785	42,317
Consolidated EBIT	10,726	8,284
Test [Member]
Segment Reporting Information [Line Items]
Net sales	33,827	42,773
Consolidated EBIT	2,425	2,338
Utility Solutions [Member]
Segment Reporting Information [Line Items]
Net sales	35,556	34,522
Consolidated EBIT	9,674	8,249
Technical Packaging [Member]
Segment Reporting Information [Line Items]
Net sales	18,200	13,221
Consolidated EBIT	1,031	1,813
Corporate (loss) [Member]
Segment Reporting Information [Line Items]
Consolidated EBIT	$ (7,047)	$ (7,487)

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.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-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

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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).

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The net amount of operating interest income (expense).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 225
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04.10)
-URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882

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Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

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