XML 66 R51.htm IDEA: XBRL DOCUMENT v3.6.0.2
Investment in Real Estate - Operating Property (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Real Estate Properties [Line Items]      
Land and land improvements $ 73,239 $ 73,161  
Buildings and building improvements 133,678 133,399  
Timber 10,203 9,856  
Operating property 217,120 216,416  
Less: Accumulated depreciation 67,349 64,069  
Net operating property 149,771 152,347  
Depletion $ 500 $ 500 $ 500
Land and land improvements | Minimum      
Real Estate Properties [Line Items]      
Estimated Useful Life (in years) 5 years    
Land and land improvements | Maximum      
Real Estate Properties [Line Items]      
Estimated Useful Life (in years) 20 years    
Buildings and building improvements | Minimum      
Real Estate Properties [Line Items]      
Estimated Useful Life (in years) 20 years    
Buildings and building improvements | Maximum      
Real Estate Properties [Line Items]      
Estimated Useful Life (in years) 40 years