Fair Value Measurements - Narrative (Details) - USD ($) |
1 Months Ended | 12 Months Ended | |
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Aug. 31, 2020 |
Sep. 30, 2020 |
Sep. 30, 2021 |
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Fair Value Disclosures [Abstract] | |||
Assets held for sale, fair value | $ 0 | $ 0 | |
MSP termination benefits payment | $ 5,175,000 | $ 5,175,000 | |
Deferred retirement benefit | $ 0 |
X | ||||||||||
- Definition Defined benefit plan benefit obligation termination benefits paid. No definition available.
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X | ||||||||||
- Definition Fair value portion of assets classified as held for sale. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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X | ||||||||||
- References No definition available.
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X | ||||||||||
- Definition Amount of liability for retirement benefits, classified as other. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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