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Notes Receivable (Details) - Real Estate [Domain]
6 Months Ended
Jun. 30, 2015
USD ($)
loan
Jun. 30, 2014
USD ($)
Notes receivable activities    
Advances under notes receivable $ 1,254,000 $ 89,000
Principal payments received under notes receivable   (72,000)
Reclassed to real estate under development (316,000)  
Net increase in notes receivable $ 938,000 $ 17,000
Number of Loans | loan 9  
Loan commitment $ 3,288,000  
Weighted average interest rate (as a percent) 10.40%  
Remaining loan commitments $ 2,033,000