Inventory - Summary of Interests in Lot Option Agreements (Details) - Unconsolidated lot option agreements - USD ($) $ in Thousands |
Mar. 31, 2021 |
Sep. 30, 2020 |
---|---|---|
Real Estate Properties [Line Items] | ||
Deposits & Non-refundable Pre-acquisition Costs Incurred | $ 93,346 | $ 75,921 |
Remaining Obligation | $ 567,424 | $ 395,133 |