ACCUMULATED OTHER COMPREHENSIVE INCOME - Components of AOCI (Details) - USD ($) $ in Thousands |
12 Months Ended | |||
|---|---|---|---|---|
Sep. 30, 2025 |
Sep. 30, 2024 |
Sep. 30, 2023 |
Sep. 30, 2022 |
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| Accumulated Other Comprehensive Income (Loss) [Line Items] | ||||
| AOCI balance | $ 480,942 | $ 437,206 | $ 525,281 | $ 487,076 |
| Fair value of derivatives, tax | (180) | 316 | ||
| Pension liability, tax | (361) | (1,496) | ||
| Cumulative foreign currency translation | ||||
| Accumulated Other Comprehensive Income (Loss) [Line Items] | ||||
| AOCI balance | (84,997) | (174,623) | (190,196) | (203,310) |
| Fair value of cash flow hedges | ||||
| Accumulated Other Comprehensive Income (Loss) [Line Items] | ||||
| AOCI balance | (553) | 926 | 9,032 | 7,937 |
| Minimum pension liabilities | ||||
| Accumulated Other Comprehensive Income (Loss) [Line Items] | ||||
| AOCI balance | 7,540 | 4,955 | 6,760 | 5,182 |
| Accumulated Other Comprehensive (Loss) Income (net of tax) | ||||
| Accumulated Other Comprehensive Income (Loss) [Line Items] | ||||
| AOCI balance | $ (78,010) | $ (168,742) | $ (174,404) | $ (190,191) |
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of tax expense (benefit), after reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of tax (expense) benefit for reclassification adjustment from accumulated other comprehensive (income) loss of defined benefit plan. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of equity (deficit) attributable to parent and noncontrolling interest. Excludes temporary equity. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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