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Variable Interest Entities - Summary of Interests in Land Option Agreements (Detail) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Variable Interest Entity [Line Items]    
Deposits $ 74,057 $ 71,909
Remaining Purchase Price 799,319 741,218
Consolidated Inventory Held by VIEs 0 0
Consolidated VIEs    
Variable Interest Entity [Line Items]    
Deposits 0 0
Remaining Purchase Price 0 0
Consolidated Inventory Held by VIEs 0 0
Unconsolidated VIEs    
Variable Interest Entity [Line Items]    
Deposits 42,896 41,198
Remaining Purchase Price 440,974 433,720
Other land option agreements    
Variable Interest Entity [Line Items]    
Deposits 31,161 30,711
Remaining Purchase Price $ 358,345 $ 307,498