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REAL ESTATE INVENTORY AND LAND DEPOSITS - Narrative (Details)
$ in Millions
Mar. 31, 2021
USD ($)
lot
Dec. 31, 2020
USD ($)
lot
Real Estate [Line Items]    
Right to purchase lots of land option (in lot) | lot 7,373 7,449
Aggregate purchase price, excluding acquisitions $ 519.8 $ 485.4
Non-refundable option deposits 92.5 65.3
Aggregate purchase price $ 657.5 $ 760.4
WLH    
Real Estate [Line Items]    
Right to purchase lots of land option (in lot) | lot 1,476 2,426
Non-refundable option deposits $ 32.0 $ 60.3
Aggregate purchase price $ 137.7 $ 275.0