Owned Inventory - Summary of Interests in Lot Option Agreements (Details) - Unconsolidated Entities - USD ($) $ in Thousands	Mar. 31, 2023	Sep. 30, 2022
Real Estate Properties [Line Items]
Deposits and non-refundable pre-acquisition costs incurred	$ 152,008	$ 142,433
Remaining purchase price if lot option agreements are exercised	$ 789,333	$ 827,600