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Goodwill and Intangible Assets - Narrative (Details) $ in Thousands | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2025 USD ($) | Sep. 30, 2024 USD ($) | Sep. 30, 2025 USD ($) reportingUnit | Sep. 30, 2024 USD ($) | Mar. 31, 2025 USD ($) reportingUnit
Goodwill [Line Items] |  |  |  |  |
Number of reporting units | reportingUnit |  |  | 3 |  | 3
Goodwill | $ 731,218 |  | $ 731,218 |  | $ 710,807
Goodwill accumulated impairment loss | $ 113,174 |  | $ 113,174 |  | 113,174
Finite-lived intangible asset, useful life (in years) | 17 years |  | 17 years |  |
Indefinite-lived trademarks | $ 47,863 |  | $ 47,863 |  | 46,294
Amortization of intangibles | 7,683 | $ 7,547 | 15,318 | $ 15,047 |
Estimated annual amortization expense next year | 31,000 |  | 31,000 |  |
Estimated annual amortization expense two years from current year | 31,000 |  | 31,000 |  |
Estimated annual amortization expense three years from current year | 31,000 |  | 31,000 |  |
Estimated annual amortization expense four years from current year | 31,000 |  | 31,000 |  |
Estimated annual amortization expense five years from current year | $ 31,000 |  | $ 31,000 |  |
Trademark |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Finite-lived intangible asset, useful life (in years) | 13 years |  | 13 years |  |
Customer relationships |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Finite-lived intangible asset, useful life (in years) | 17 years |  | 17 years |  |
Acquired technology |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Finite-lived intangible asset, useful life (in years) | 16 years |  | 16 years |  |
Other |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Finite-lived intangible asset, useful life (in years) | 6 years |  | 6 years |  |
Duff Norton Group |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Goodwill | $ 9,699 |  | $ 9,699 |  | 9,699
Rest of Products |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Goodwill | 319,838 |  | 319,838 |  | 305,110
Precision Conveyance |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Goodwill | $ 401,681 |  | $ 401,681 |  | $ 395,998

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