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Lease Commitments (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Noncancelable operating leases      
2017 $ 1,384    
2018 890    
2019 729    
2020 455    
2021 204    
Total 3,662    
Capital lease obligations      
2017 514    
2018 117    
2019 38    
Total 669    
Leased model homes      
2017 275    
2018 121    
Total 396    
Total      
2017 2,173    
2018 1,128    
2019 767    
2020 455    
2021 204    
Total 4,727    
Administration and Sales Offices      
Rental expense      
Rental expense $ 1,200 $ 900 $ 500