Inventory - Summary of Interests in Lot Option Agreements (Details) - Unconsolidated lot option agreements - USD ($) $ in Thousands |
Dec. 31, 2019 |
Sep. 30, 2019 |
---|---|---|
Real Estate Properties [Line Items] | ||
Deposits & Non-refundable Pre-acquisition Costs Incurred | $ 74,836 | $ 78,202 |
Remaining Obligation | $ 386,762 | $ 389,705 |