Detail of Selected Balance Sheet Accounts - Property, Plant and Equipment (Details) - USD ($) $ in Thousands |
Mar. 31, 2026 |
Sep. 30, 2025 |
|---|---|---|
| Property, Plant and Equipment [Line Items] | ||
| Property, plant and equipment, gross | $ 267,366 | $ 262,897 |
| Less: Accumulated depreciation | (155,544) | (151,848) |
| Total property, plant and equipment, net | 111,822 | 111,049 |
| Land | ||
| Property, Plant and Equipment [Line Items] | ||
| Property, plant and equipment, gross | 24,387 | 24,436 |
| Buildings and improvements | ||
| Property, Plant and Equipment [Line Items] | ||
| Property, plant and equipment, gross | 133,187 | 133,455 |
| Machinery and equipment | ||
| Property, Plant and Equipment [Line Items] | ||
| Property, plant and equipment, gross | 100,534 | 99,840 |
| Furniture and fixtures | ||
| Property, Plant and Equipment [Line Items] | ||
| Property, plant and equipment, gross | 3,530 | 3,056 |
| Construction in process | ||
| Property, Plant and Equipment [Line Items] | ||
| Property, plant and equipment, gross | $ 5,728 | $ 2,110 |