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Real Estate Investments (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2020
Dec. 31, 2019
Schedule of Investments [Line Items]    
Land $ 14,168 $ 14,168
Buildings and improvements 43,786 43,531
Subtotal 57,954 57,699
Less accumulated depreciation and amortization 13,899 13,597
Total $ 44,055 $ 44,102
Minimum    
Schedule of Investments [Line Items]    
Estimated useful life 7 years  
Maximum    
Schedule of Investments [Line Items]    
Estimated useful life 39 years