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GOODWILL AND OTHER INTANGIBLE ASSETS - Intangible assets gross carrying amounts and accumulated amortization (Details) - USD ($) $ in Thousands | Jun. 30, 2024 | Sep. 30, 2023
--- | --- | ---
GOODWILL AND OTHER INTANGIBLE ASSETS |  |
Goodwill | $ 535,372 | $ 503,177
Less: accumulated amortization | 229,467 | 204,881
Patents |  |
GOODWILL AND OTHER INTANGIBLE ASSETS |  |
Gross carrying amount | 2,551 | 2,516
Less: accumulated amortization | 1,322 | 1,218
Net | 1,229 | 1,298
Capitalized software |  |
GOODWILL AND OTHER INTANGIBLE ASSETS |  |
Gross carrying amount | 130,648 | 121,883
Less: accumulated amortization | 89,737 | 80,774
Net | 40,911 | 41,109
Customer relationships |  |
GOODWILL AND OTHER INTANGIBLE ASSETS |  |
Gross carrying amount | 327,537 | 296,927
Less: accumulated amortization | 127,322 | 113,311
Net | 200,215 | 183,616
Other |  |
GOODWILL AND OTHER INTANGIBLE ASSETS |  |
Gross carrying amount | 15,122 | 14,232
Less: accumulated amortization | 11,085 | 9,578
Net | 4,037 | 4,654
Trade names |  |
GOODWILL AND OTHER INTANGIBLE ASSETS |  |
Trade names | $ 162,589 | $ 161,447

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