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REAL ESTATE INVENTORY AND LAND DEPOSITS - Narrative (Details)
$ in Millions
Sep. 30, 2020
USD ($)
lot
Dec. 31, 2019
USD ($)
lot
Real Estate [Line Items]    
Right to purchase lots of land option (in lot) | lot 7,670 4,263
Aggregate purchase price $ 515.8 $ 289.7
Non-refundable option deposits $ 138.2 $ 39.8
WLH    
Real Estate [Line Items]    
Right to purchase lots of land option (in lot) | lot 2,699  
Aggregate purchase price $ 334.9