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Earnings Per Share - Additional Information (Detail) - shares
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Business Acquisition [Line Items]        
Common stock issued and outstanding - historical (shares) 141,661,713 151,162,999    
TRI Pointe shares outstanding - recast (shares) 141,661,713 151,162,999    
Common Stock [Member]        
Business Acquisition [Line Items]        
TRI Pointe shares outstanding - recast (shares) 141,661,713 151,162,999 158,626,229 161,813,750