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Commitments and Contingencies - Narrative (Details) $ in Thousands |  | 12 Months Ended |
--- | --- | --- | ---
Mar. 29, 2021 USD ($) | Sep. 30, 2021 USD ($) | Sep. 30, 2020 USD ($) | Jun. 30, 2021 press
Loss Contingencies [Line Items] |  |  |  |
Insurance proceeds received for damaged property |  | $ 4,101 | $ 7,828 |
Gain on insurance proceeds received |  | 2,397 | 5,874 |
Recoverable amounts of business interruption expenses |  | 546 |  |
Quality Aluminum Forge, LLC Manufacturing Facility Fire |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Insurance proceeds received for damaged property |  | 4,548 |  |
Gain on insurance proceeds received |  | 2,397 | 5,874 |
Recoverable amounts of business interruption expenses |  | 546 | 1,219 |
Quality Aluminum Forge, LLC Manufacturing Facility Fire | Income before income tax benefit |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Gain on insurance proceeds received |  | $ 3,001 | $ 8,974 |
Quality Aluminum Forge, LLC Manufacturing Facility Fire | Damage from Fire, Explosion or Other Hazard |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Number of additional presses to be restored | press |  |  |  | 2
Number of presses damaged | press |  |  |  | 6
Class Action Suit in Superior Court of California, Orange County - Wage-and-hour law violations |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Loss contingency, paid | $ 315 |  |  |

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