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Real Estate Inventories - Summary of Real Estate Held for Development and Sale (Detail) - USD ($)
$ in Thousands
Mar. 31, 2019
Dec. 31, 2018
Real Estate Properties [Line Items]    
Real estate inventories $ 17,598 $ 20,253
Land and Land Development Costs [Member]    
Real Estate Properties [Line Items]    
Real estate inventories 7,919 9,741
Cost of Construction (Including Capitalized Interest and Real Estate Taxes) [Member]    
Real Estate Properties [Line Items]    
Real estate inventories $ 9,679 $ 10,512