XML 58 R47.htm IDEA: XBRL DOCUMENT v3.21.1
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