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Debt - Casthouse and Surety (Details) - USD ($)	Nov. 02, 2021	Jun. 30, 2022
Casthouse Facility [Member]
Debt Instrument [Line Items]
Debt instrument, term	8 years
Medium-term notes	$ 130,000,000
Debt instrument, quarterly installment fee	1.739%
Debt instrument, remaining payment after drawdown of funds	60.00%
Medium-term notes, outstanding borrowings		$ 40,000,000
Surety Bond [Member]
Debt Instrument [Line Items]
Loss contingency accrual		$ 6,600,000

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