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Property and Equipment (Details) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Land and Other Inventories    
Gross property and equipment $ 75,946 $ 74,025
Less: accumulated depreciation (43,282) (40,345)
Property and equipment, net 32,664 33,680
Land Improvements    
Land and Other Inventories    
Gross property and equipment 24,420 23,820
Building and Improvements    
Land and Other Inventories    
Gross property and equipment 38,821 38,367
Machinery, Equipment and Fixtures    
Land and Other Inventories    
Gross property and equipment 5,877 5,185
Capital leases 2,100  
Accumulated depreciation of capital leased assets 1,700  
Motor vehicles    
Land and Other Inventories    
Gross property and equipment 521 521
Furniture and Fixtures    
Land and Other Inventories    
Gross property and equipment 4,016 4,033
Capitalized software    
Land and Other Inventories    
Gross property and equipment $ 2,291 $ 2,099