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GOODWILL AND OTHER INTANGIBLE ASSETS - Intangible assets gross carrying amounts and accumulated amortization (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Sep. 30, 2023
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GOODWILL AND OTHER INTANGIBLE ASSETS |  |
Goodwill | $ 537,601 | $ 503,177
Less: accumulated amortization | 212,750 | 204,881
Trade names |  |
GOODWILL AND OTHER INTANGIBLE ASSETS |  |
Trade names | 163,209 | 161,447
Customer Relationships |  |
GOODWILL AND OTHER INTANGIBLE ASSETS |  |
Gross carrying amount | 328,624 | 296,927
Less: accumulated amortization | 117,755 | 113,311
Net | 210,869 | 183,616
Capitalized software |  |
GOODWILL AND OTHER INTANGIBLE ASSETS |  |
Gross carrying amount | 125,237 | 121,883
Less: accumulated amortization | 83,709 | 80,774
Net | 41,528 | 41,109
Patents |  |
GOODWILL AND OTHER INTANGIBLE ASSETS |  |
Gross carrying amount | 2,517 | 2,516
Less: accumulated amortization | 1,253 | 1,218
Net | 1,264 | 1,298
Other |  |
GOODWILL AND OTHER INTANGIBLE ASSETS |  |
Gross carrying amount | 15,216 | 14,232
Less: accumulated amortization | 10,033 | 9,578
Net | $ 5,183 | $ 4,654

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