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REVENUES - Disaggregation of Revenues (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018
Disaggregation of revenues |  |  |  |
Total revenues | $ 199,766 | $ 192,223 | $ 576,312 | $ 540,496
Point in time |  |  |  |
Disaggregation of revenues |  |  |  |
Total revenues | 89,092 |  | 267,021 |
Over time |  |  |  |
Disaggregation of revenues |  |  |  |
Total revenues | 110,674 |  | 309,291 |
United States |  |  |  |
Disaggregation of revenues |  |  |  |
Total revenues | 146,268 |  | 417,927 |
International |  |  |  |
Disaggregation of revenues |  |  |  |
Total revenues | 53,498 |  | 158,385 |
Commercial |  |  |  |
Disaggregation of revenues |  |  |  |
Total revenues | 159,034 |  | 460,180 |
Government |  |  |  |
Disaggregation of revenues |  |  |  |
Total revenues | 40,732 |  | 116,132 |
Filtration |  |  |  |
Disaggregation of revenues |  |  |  |
Total revenues | 83,067 | 69,721 | 228,769 | 195,531
Filtration | Point in time |  |  |  |
Disaggregation of revenues |  |  |  |
Total revenues | 41,633 |  | 115,852 |
Filtration | Over time |  |  |  |
Disaggregation of revenues |  |  |  |
Total revenues | 41,434 |  | 112,917 |
Filtration | United States |  |  |  |
Disaggregation of revenues |  |  |  |
Total revenues | 69,872 |  | 190,701 |
Filtration | International |  |  |  |
Disaggregation of revenues |  |  |  |
Total revenues | 13,195 |  | 38,068 |
Filtration | Commercial |  |  |  |
Disaggregation of revenues |  |  |  |
Total revenues | 47,482 |  | 131,112 |
Filtration | Government |  |  |  |
Disaggregation of revenues |  |  |  |
Total revenues | 35,585 |  | 97,657 |
Test |  |  |  |
Disaggregation of revenues |  |  |  |
Total revenues | 42,298 | 45,034 | 126,459 | 123,368
Test | Point in time |  |  |  |
Disaggregation of revenues |  |  |  |
Total revenues | 6,485 |  | 29,092 |
Test | Over time |  |  |  |
Disaggregation of revenues |  |  |  |
Total revenues | 35,813 |  | 97,367 |
Test | United States |  |  |  |
Disaggregation of revenues |  |  |  |
Total revenues | 26,923 |  | 82,072 |
Test | International |  |  |  |
Disaggregation of revenues |  |  |  |
Total revenues | 15,375 |  | 44,387 |
Test | Commercial |  |  |  |
Disaggregation of revenues |  |  |  |
Total revenues | 37,980 |  | 111,577 |
Test | Government |  |  |  |
Disaggregation of revenues |  |  |  |
Total revenues | 4,318 |  | 14,882 |
USG |  |  |  |
Disaggregation of revenues |  |  |  |
Total revenues | 52,894 | 55,489 | 157,639 | 157,942
USG | Point in time |  |  |  |
Disaggregation of revenues |  |  |  |
Total revenues | 40,968 |  | 122,075 |
USG | Over time |  |  |  |
Disaggregation of revenues |  |  |  |
Total revenues | 11,926 |  | 35,564 |
USG | United States |  |  |  |
Disaggregation of revenues |  |  |  |
Total revenues | 38,414 |  | 112,289 |
USG | International |  |  |  |
Disaggregation of revenues |  |  |  |
Total revenues | 14,480 |  | 45,350 |
USG | Commercial |  |  |  |
Disaggregation of revenues |  |  |  |
Total revenues | 52,065 |  | 154,240 |
USG | Government |  |  |  |
Disaggregation of revenues |  |  |  |
Total revenues | 829 |  | 3,399 |
Technical Packaging |  |  |  |
Disaggregation of revenues |  |  |  |
Total revenues | 21,507 | $ 21,979 | 63,445 | $ 63,655
Technical Packaging | Over time |  |  |  |
Disaggregation of revenues |  |  |  |
Total revenues | 21,507 |  | 63,445 |
Technical Packaging | United States |  |  |  |
Disaggregation of revenues |  |  |  |
Total revenues | 11,559 |  | 32,865 |
Technical Packaging | International |  |  |  |
Disaggregation of revenues |  |  |  |
Total revenues | 9,948 |  | 30,580 |
Technical Packaging | Commercial |  |  |  |
Disaggregation of revenues |  |  |  |
Total revenues | $ 21,507 |  | 63,251 |
Technical Packaging | Government |  |  |  |
Disaggregation of revenues |  |  |  |
Total revenues |  |  | $ 194 |

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