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Loans Receivable (Details)
$ in Thousands
6 Months Ended 12 Months Ended
Jun. 30, 2016
USD ($)
portfolio_segment
class_of_financing
type_of_financing
Dec. 31, 2015
USD ($)
Jun. 30, 2015
USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Loan carrying-value $ 95,829 $ 95,871  
Number of types of financing receivable | type_of_financing 1    
Number of portfolio segments | portfolio_segment 1    
Number of classes of financing receivable | class_of_financing 1    
Kennewick, Washington [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Loan carrying-value $ 85,605 $ 85,505  
Interest rate of mortgage loans 9.00% 9.00%  
Loans receivable, current pay rate 8.75%    
Periodic payment terms, balloon payment to be received $ 87,245    
Oklahoma City, Oklahoma [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Loan carrying-value $ 8,501 $ 8,501  
Interest rate of mortgage loans 11.50% 11.50%  
Oklahoma City, Oklahoma [Member] | Tenant-in-Common [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Loan carrying-value     $ 8,420
Ownership percentage     40.00%
Other Loan Locations [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Loan carrying-value $ 1,723 $ 1,865  
Interest rate of mortgage loans 8.00% 8.00%