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GOODWILL AND INTANGIBLE ASSETS - Amortization of intangible assets (Details) - USD ($) $ in Thousands | 3 Months Ended |
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Dec. 31, 2022 | Dec. 31, 2021 | Sep. 30, 2022
Finite-Lived intangible assets |  |  |
Amortization | $ 8,781 | $ 3,396 |
Estimated amortization expense for intangible assets for each of the next five fiscal years is expected to be as follows |  |  |
Totals | 338,456 |  | $ 345,886
Customer relationships |  |  |
Estimated amortization expense for intangible assets for each of the next five fiscal years is expected to be as follows |  |  |
Totals | 286,134 |  | 291,906
Intellectual property |  |  |
Estimated amortization expense for intangible assets for each of the next five fiscal years is expected to be as follows |  |  |
Totals | 49,714 |  | 51,230
Non-compete agreements |  |  |
Estimated amortization expense for intangible assets for each of the next five fiscal years is expected to be as follows |  |  |
Totals | 1,424 |  | 1,538
Other |  |  |
Estimated amortization expense for intangible assets for each of the next five fiscal years is expected to be as follows |  |  |
Totals | $ 1,184 |  | $ 1,212

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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 + Details
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- Definition Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 926 -SubTopic 20 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=120154696&loc=d3e54445-107959 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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