Income Taxes - Deferred Taxes Table (Detail) - USD ($) $ in Millions |
Sep. 30, 2025 |
Sep. 30, 2024 |
|---|---|---|
| Components of Deferred Tax Assets [Abstract] | ||
| Real estate | $ 16.7 | $ 11.9 |
| Corporate AMT credit carryforwards | 16.5 | 0.0 |
| Employee benefits | 4.4 | 3.8 |
| Net operating loss carryforwards | 0.7 | 0.9 |
| Accruals not deductible until paid | 1.2 | 0.8 |
| Total deferred tax assets | 39.5 | 17.4 |
| Valuation allowance | (0.6) | (0.8) |
| Total deferred tax assets, net of valuation allowance | 38.9 | 16.6 |
| Components of Deferred Tax Liabilities [Abstract] | ||
| Deferral of profit on lot sales | (125.1) | (84.1) |
| Total deferred tax liabilities | (125.1) | (84.1) |
| Deferred tax liability, net | $ (86.2) | $ (67.5) |
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- References No definition available.
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- References No definition available.
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- Definition Amount of deferred tax liability attributable to taxable temporary differences. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from inventory. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition Amount, before allocation of valuation allowance, of deferred tax asset attributable to deductible temporary differences, classified as other. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible alternative minimum tax credit carryforwards. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount, before allocation of valuation allowance, of deferred tax asset attributable to deductible temporary differences from employee benefits, classified as other. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount, after deferred tax asset, of deferred tax liability attributable to taxable differences without jurisdictional netting. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition Amount of deferred tax liability attributable to taxable temporary differences from tax deferred revenue or income classified as other. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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