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Inventory - Fair Value Unobservable Inputs (Details)
$ in Thousands
3 Months Ended
Mar. 31, 2020
USD ($)
home
Mar. 31, 2019
USD ($)
home
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)    
Impairment Charges $ 5,386 $ 0
Minimum    
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)    
Average selling price ($000s) $ 466 $ 512
Sales pace per quarter (units) | home 1 3
Maximum    
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)    
Average selling price ($000s) $ 550 $ 586
Sales pace per quarter (units) | home 3 4
Measurement Input, Discount Rate | Minimum    
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)    
Discount rate 0.12  
Measurement Input, Discount Rate | Maximum    
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)    
Discount rate 0.14