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Fair Value Measurements - Narrative (Details) - USD ($) | 3 Months Ended | 6 Months Ended
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Mar. 31, 2022 | Mar. 31, 2021 | Mar. 31, 2022 | Mar. 31, 2021
Fair Value Disclosures [Abstract] |  |  |  |
Total impairment charges on land held for sale | $ 440,000 | $ 0 | $ 440,000 | $ 0
Impairment of projects in process | $ 0 | $ 0 | $ 0 | $ 0

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