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Real Estate Investments (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Dec. 31, 2018
Schedule of Investments [Line Items]          
Land $ 13,262   $ 13,262   $ 13,262
Buildings and improvements 43,211   43,211   43,074
Subtotal 56,473   56,473   56,336
Less accumulated depreciation and amortization 13,224   13,224   12,327
Total 43,249   43,249   $ 44,009
Restricted Cash 750   $ 750    
Proceeds from Sale of Real Estate Held-for-investment $ 745        
Ownership Percentage by Parent 70.00%   70.00%    
Gain on sale of real estate investments $ 0 $ 0 $ 745 $ 0  
Minimum          
Schedule of Investments [Line Items]          
Estimated useful life     7 years    
Maximum          
Schedule of Investments [Line Items]          
Estimated useful life     39 years    
Parent [Member]          
Schedule of Investments [Line Items]          
Gain on sale of real estate investments 521        
Noncontrolling Interest          
Schedule of Investments [Line Items]          
Gain on sale of real estate investments $ 224