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GOODWILL AND INTANGIBLE ASSETS - Amortization of intangible assets (Details) - USD ($) $ in Thousands | Sep. 30, 2024 | Sep. 30, 2023
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Estimated amortization expense for intangible assets for each of the next five fiscal years is expected to be as follows |  |
2025 | $ 34,825 |
2026 | 34,606 |
2027 | 34,178 |
2028 | 34,029 |
2029 | 32,892 |
Thereafter | 103,866 |
Totals | $ 274,396 | $ 308,428
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) | 8 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 |  |
2025 | $ 27,842 |
2026 | 27,780 |
2027 | 27,595 |
2028 | 27,461 |
2029 | 26,324 |
Thereafter | 97,987 |
Totals | $ 234,989 | 262,109
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 |
Intellectual property |  |
Estimated amortization expense for intangible assets for each of the next five fiscal years is expected to be as follows |  |
2025 | $ 6,459 |
2026 | 6,459 |
2027 | 6,459 |
2028 | 6,459 |
2029 | 6,459 |
Thereafter | 5,429 |
Totals | $ 37,724 | 44,103
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) | 5 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 |  |
2025 | $ 524 |
2026 | 367 |
2027 | 124 |
2028 | 109 |
2029 | 109 |
Thereafter | 450 |
Totals | $ 1,683 | $ 2,216
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 2 months 12 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 Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -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 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 985 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481283/985-20-50-2 + 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 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://www.xbrl.org/2003/role/exampleRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 55 -Paragraph 40 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482640/350-30-55-40 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -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 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 985 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481283/985-20-50-2 + Details
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