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GOODWILL AND INTANGIBLE ASSETS - Amortization of intangible assets (Details) - USD ($) $ in Thousands | Sep. 30, 2023 | Sep. 30, 2022
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Estimated amortization expense for intangible assets for each of the next five fiscal years is expected to be as follows |  |
2024 | $ 34,754 |
2025 | 34,744 |
2026 | 34,525 |
2027 | 34,096 |
2028 | 33,948 |
Thereafter | 136,361 |
Totals | $ 308,428 | $ 345,886
Weighted Average |  |
Estimated amortization expense for intangible assets for each of the next five fiscal years is expected to be as follows |  |
RUL1 (in years) | 9 years 4 months 24 days |
Customer relationships |  |
Estimated amortization expense for intangible assets for each of the next five fiscal years is expected to be as follows |  |
2024 | $ 27,774 |
2025 | 27,774 |
2026 | 27,712 |
2027 | 27,526 |
2028 | 27,393 |
Thereafter | 123,930 |
Totals | $ 262,109 | 291,906
Customer relationships | Weighted Average |  |
Estimated amortization expense for intangible assets for each of the next five fiscal years is expected to be as follows |  |
RUL1 (in years) | 9 years 10 months 24 days |
Intellectual property |  |
Estimated amortization expense for intangible assets for each of the next five fiscal years is expected to be as follows |  |
2024 | $ 6,446 |
2025 | 6,446 |
2026 | 6,446 |
2027 | 6,446 |
2028 | 6,446 |
Thereafter | 11,873 |
Totals | $ 44,103 | 51,230
Intellectual property | Weighted Average |  |
Estimated amortization expense for intangible assets for each of the next five fiscal years is expected to be as follows |  |
RUL1 (in years) | 6 years 10 months 24 days |
Other |  |
Estimated amortization expense for intangible assets for each of the next five fiscal years is expected to be as follows |  |
2024 | $ 534 |
2025 | 524 |
2026 | 367 |
2027 | 124 |
2028 | 109 |
Thereafter | 558 |
Totals | $ 2,216 | $ 2,750
Other | Weighted Average |  |
Estimated amortization expense for intangible assets for each of the next five fiscal years is expected to be as follows |  |
RUL1 (in years) | 6 years 4 months 24 days |

X
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- Definition Amount of amortization for asset, excluding financial asset and goodwill, lacking physical substance with finite life expected to be recognized after fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References No definition available. + Details
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- Definition Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a)(3) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482665/350-30-50-2 + Details
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- Definition Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a)(3) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482665/350-30-50-2 + Details
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