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DERIVATIVES AND HEDGING ACTIVITIES - Cross Currency Swaps (Details) - Net Investment Hedging - Designated as Hedging Instrument - USD ($) $ in Thousands | 12 Months Ended
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Sep. 30, 2025 | Sep. 30, 2024
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |
Notional amount | $ 126,392 | $ 146,392
Unrealized Losses | (13,703) | (6,379)
USD Euro Exchange Future |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |
Notional amount | 81,392 | 81,392
Unrealized Losses | (9,443) | (5,440)
USD Sweden Exchange Future |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |
Notional amount | 20,000 | 20,000
Unrealized Losses | (2,571) | (468)
USD Singapore Exchange Future |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |
Notional amount | 0 | 20,000
Unrealized Losses | 0 | (441)
USD Euro Exchange Future |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |
Notional amount | 25,000 | 25,000
Unrealized Losses | (1,689) | (30)
Cross-Currency Swaps |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |
Unrealized losses, net of tax | $ 4,652 | $ 2,156

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