Property, Plant, and Equipment - Additional Information (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Sep. 30, 2021 |
Sep. 30, 2020 |
Sep. 30, 2019 |
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| Property, Plant and Equipment [Abstract] | |||
| Depreciation, depletion and amortization expense | $ 49.5 | $ 39.1 | $ 30.1 |
| Mineral reserves, net, accumulated depreciation | 84.1 | 20.3 | |
| Asset retirement obligation, depreciation | 2.1 | 0.0 | |
| Capitalized costs, pre-production stripping costs | $ 2.7 | $ 0.0 | |
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- Definition Asset Retirement Obligation, Depreciation No definition available.
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- Definition Capitalized Costs, Pre-production Stripping Costs No definition available.
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- Definition Mineral Reserves, Net, Accumulated Depreciation No definition available.
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- Definition The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- References No definition available.
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