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Related Party Transactions - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Thousands, shares in Millions
9 Months Ended
Mar. 13, 2015
Sep. 30, 2015
Sep. 30, 2016
Dec. 31, 2015
Related Party Transaction [Line Items]        
Share repurchase, amount   $ 6,100    
Affiliated Entity [Member]        
Related Party Transaction [Line Items]        
Accounts receivable, related parties     $ 1,400 $ 1,800
M/I Homes Inc [Member]        
Related Party Transaction [Line Items]        
Accounts receivable, related parties     $ 800 $ 1,000
IBS [Member]        
Related Party Transaction [Line Items]        
Common Stock Repurchase, Shares 0.3      
Share repurchase, amount $ 6,100      
Share repurchase, price per share $ 19.23      
Discount from last reported price of our common stock 7.50%