BUSINESS SEGMENT INFORMATION (Schedule Of Net Sales And Earnings Before Income Tax) (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Segment Reporting Information [Line Items]
Consolidated NET SALES	$ 192,223	$ 171,189	$ 540,496	$ 478,735
Consolidated EBIT	25,559	18,635	56,165	53,118
Less: Interest expense	(2,243)	(1,213)	(6,464)	(2,752)
Earnings before income taxes	23,316	17,422	49,701	50,366
Filtration [Member]
Segment Reporting Information [Line Items]
Consolidated NET SALES	69,721	71,179	195,531	198,869
Consolidated EBIT	14,292	11,945	35,056	34,296
Test [Member]
Segment Reporting Information [Line Items]
Consolidated NET SALES	45,034	37,544	123,368	109,738
Consolidated EBIT	5,902	4,885	13,797	11,076
Utility Solutions Group [Member]
Segment Reporting Information [Line Items]
Consolidated NET SALES	55,489	42,059	157,942	110,287
Consolidated EBIT	11,528	8,477	27,805	25,585
Technical Packaging [Member]
Segment Reporting Information [Line Items]
Consolidated NET SALES	21,979	20,407	63,655	59,841
Consolidated EBIT	2,505	2,433	5,355	5,660
Corporate (loss) [Member]
Segment Reporting Information [Line Items]
Consolidated EBIT	$ (8,668)	$ (9,105)	$ (25,848)	$ (23,499)

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.

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