Basis of Presentation and Summary of Significant Accounting Policies - Summary of Interests in Lot Option Agreements (Details) - Unconsolidated lot option agreements - USD ($) $ in Thousands	Sep. 30, 2024	Sep. 30, 2023
Real Estate Properties [Line Items]
Deposits and non-refundable pre-acquisition costs incurred	$ 227,770	$ 165,371
Remaining purchase price if lot option agreements are exercised	$ 1,458,679	$ 949,447

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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