Commitments and Contingencies - Narrative (Details) $ in Thousands		1 Months Ended		3 Months Ended		6 Months Ended
	Mar. 29, 2021 USD ($)	Jan. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Mar. 31, 2021 USD ($) press	Mar. 31, 2020 USD ($)	Mar. 31, 2021 USD ($) press	Mar. 31, 2020 USD ($)
Loss Contingencies [Line Items]
Insurance proceeds received						$ 4,101	$ 4,500
Proceeds from loss contingency receivable		$ 648				4,646
Gain on insurance proceeds received				$ 0	$ 1,000	2,495	1,000
Recoverable amounts of business interruption expenses						546
Quality Aluminum Forge, LLC Manufacturing Facility Fire
Loss Contingencies [Line Items]
Insurance proceeds received			$ 3,148
Proceeds from loss contingency receivable						4,646
Gain on insurance proceeds received						2,495	1,000
Recoverable amounts of business interruption expenses						546
Quality Aluminum Forge, LLC Manufacturing Facility Fire | Income (loss) before income tax (benefit) expense
Loss Contingencies [Line Items]
Gain on insurance proceeds received						$ 3,099	$ 3,287
Quality Aluminum Forge, LLC Manufacturing Facility Fire | Damage from Fire, Explosion or Other Hazard
Loss Contingencies [Line Items]
Number of presses to be restored | press				2		2
Number of presses damaged | press				6		6
Class Action Suit in Superior Court of California, Orange County - Violation of Wage-and-hour Laws
Loss Contingencies [Line Items]
Loss contingency paid	$ 315