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Notes Receivable - Components (Details)
$ in Thousands
3 Months Ended
Mar. 31, 2016
USD ($)
loan
Mar. 31, 2015
USD ($)
Notes receivable activities    
Advances under notes receivable $ 93 $ 892
Principal payments received under notes receivable (30)  
Net increase in notes receivable $ 63 $ 892
Notes Receivable | Commitments to Extend Credit    
On-going commitments    
Number of Loans | loan 6  
Total commitments $ 2,600  
Remaining commitments $ 2,224  
Notes Receivable | Commitments to Extend Credit | Weighted Average    
On-going commitments    
Interest rate (as a percent) 10.00%