Annual report pursuant to Section 13 and 15(d)

Real Estate and Intangible Assets Real Estate and Intangible Assets - Property Dispositions (Details)

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Real Estate and Intangible Assets Real Estate and Intangible Assets - Property Dispositions (Details)
$ in Thousands
12 Months Ended
Nov. 30, 2017
USD ($)
a
Dec. 31, 2017
USD ($)
a
Dec. 31, 2016
USD ($)
a
Dec. 31, 2015
USD ($)
Real Estate Properties [Line Items]        
Total Acres | a   63,014 50,592  
(Loss) gain on disposals of real estate assets, net   $ (21) $ 0 $ 14
Litigation settlement, amount awarded from other party   $ 106    
Hillsborough, FL        
Real Estate Properties [Line Items]        
Total Acres | a 219      
Proceeds from sale of property $ 3,900      
(Loss) gain on disposals of real estate assets, net $ 85