Inventory - Schedule of Interests in Lot Option Agreements (Details) - Unconsolidated Entities - USD ($) $ in Thousands	Dec. 31, 2025	Sep. 30, 2025
Real Estate Properties [Line Items]
Deposits and non-refundable pre-acquisition costs incurred	$ 353,903	$ 333,435
Remaining purchase price if lot option agreements are exercised	$ 1,601,201	$ 1,610,171

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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