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REVENUES (Schedule Of Revenues) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Mar. 31, 2019 | Mar. 31, 2018 | Mar. 31, 2019 | Mar. 31, 2018
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | $ 193,949 | $ 174,778 | $ 376,546 | $ 348,273
Point in time [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 91,440 |  | 177,929 |
Over time [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 102,509 |  | 198,617 |
United States [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 138,017 |  | 271,166 |
International [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 55,932 |  | 105,380 |
Commercial [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 153,957 |  | 301,184 |
Government [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 39,992 |  | 75,362 |
Filtration [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 79,478 | 65,775 | 145,702 | 125,810
Filtration [Member] | Point in time [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 42,400 |  | 74,214 |
Filtration [Member] | Over time [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 37,078 |  | 71,488 |
Filtration [Member] | United States [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 66,068 |  | 120,833 |
Filtration [Member] | International [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 13,410 |  | 24,869 |
Filtration [Member] | Commercial [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 46,325 |  | 83,546 |
Filtration [Member] | Government [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 33,153 |  | 62,156 |
Test [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 42,875 | 40,805 | 84,161 | 78,334
Test [Member] | Point in time [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 12,166 |  | 22,608 |
Test [Member] | Over time [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 30,709 |  | 61,553 |
Test [Member] | United States [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 26,694 |  | 55,148 |
Test [Member] | International [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 16,181 |  | 29,013 |
Test [Member] | Commercial [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 37,451 |  | 73,688 |
Test [Member] | Government [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 5,424 |  | 10,473 |
USG [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 48,890 | 46,699 | 104,745 | 102,453
USG [Member] | Point in time [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 36,874 |  | 81,107 |
USG [Member] | Over time [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 12,016 |  | 23,638 |
USG [Member] | United States [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 33,798 |  | 73,879 |
USG [Member] | International [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 15,092 |  | 30,866 |
USG [Member] | Commercial [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 47,551 |  | 102,206 |
USG [Member] | Government [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 1,339 |  | 2,539 |
Technical Packaging [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 22,706 | $ 21,499 | 41,938 | $ 41,676
Technical Packaging [Member] | Point in time [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 0 |  | 0 |
Technical Packaging [Member] | Over time [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 22,706 |  | 41,938 |
Technical Packaging [Member] | United States [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 11,457 |  | 21,306 |
Technical Packaging [Member] | International [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 11,249 |  | 20,632 |
Technical Packaging [Member] | Commercial [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 22,630 |  | 41,744 |
Technical Packaging [Member] | Government [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | $ 76 |  | $ 194 |

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