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Property and Equipment (Details) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Components of property and equipment    
Property and equipment, Gross $ 41,458 $ 37,736
Accumulated depreciation (9,224) (9,374)
Total property and equipment 32,234 28,362
Land [Member]    
Components of property and equipment    
Property and equipment, Gross 6,827 6,827
Buildings [Member]    
Components of property and equipment    
Property and equipment, Gross 23,990 14,833
Leasehold Improvements [Member]    
Components of property and equipment    
Property and equipment, Gross 2,220 2,020
Furniture and equipment [Member]    
Components of property and equipment    
Property and equipment, Gross 8,075 7,410
Software [Member]    
Components of property and equipment    
Property and equipment, Gross 306 421
Construction in process [Member]    
Components of property and equipment    
Property and equipment, Gross $ 40 $ 6,225