Restructuring - Schedule of Restructuring by Income Statement Location (Details) - USD ($) $ in Thousands  | 
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2025  | 
Jun. 30, 2024  | 
Jun. 30, 2025  | 
Jun. 30, 2024  | 
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| Restructuring Cost and Reserve [Line Items] | ||||
| Restructuring costs | $ 2,438 | $ 1,079 | $ 1,133 | $ 3,862 | 
| Cost of sales | ||||
| Restructuring Cost and Reserve [Line Items] | ||||
| Restructuring costs | (2,112) | (703) | 203 | (3,080) | 
| Selling expense | ||||
| Restructuring Cost and Reserve [Line Items] | ||||
| Restructuring costs | (4) | (112) | (57) | 113 | 
| Administrative expense | ||||
| Restructuring Cost and Reserve [Line Items] | ||||
| Restructuring costs | (322) | (264) | (1,279) | (895) | 
| Income (loss) before income taxes | ||||
| Restructuring Cost and Reserve [Line Items] | ||||
| Restructuring costs | $ (2,438) | $ (1,079) | $ (1,133) | $ (3,862) | 
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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, after cash payment, of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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