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, 2023	Sep. 30, 2022
Real Estate Properties [Line Items]
Deposits & Non-refundable Pre-acquisition Costs Incurred	$ 165,371	$ 142,433
Remaining purchase price if lot option agreements are exercised	$ 949,447	$ 827,600