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Public Housing Capital ("PHC") Fund Trust Certificates Information Table on Public Housing Capital Fund Trusts (Details) - Public housing capital fund trusts [Member] - USD ($)
3 Months Ended 12 Months Ended
Mar. 31, 2016
Dec. 31, 2015
Schedule of Available-for-sale Securities [Line Items]    
Weighted Average Interest Rate over Life 5.20%  
Principal Outstanding $ 57,287,229 $ 58,344,872
Standard & Poor's, AA- Rating [Member] | Public Housing Capital Fund Trust I [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Weighted Average Lives (Years) 9 years 22 days 9 years 3 months
Investment Rating AA- AA-
Weighted Average Interest Rate over Life 5.33% 5.33%
Principal Outstanding $ 24,923,137 $ 25,980,780
Standard & Poor's, A+ Rating [Member] | Public Housing Capital Fund Trust II [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Weighted Average Lives (Years) 8 years 5 months 1 day 8 years 8 months 1 day
Investment Rating A+ A+
Weighted Average Interest Rate over Life 4.29% 4.29%
Principal Outstanding $ 11,465,660 $ 11,465,660
Standard & Poor's, BBB Rating [Member] | Public Housing Capital Fund Trust III [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Weighted Average Lives (Years) 9 years 6 months 22 days 9 years 9 months 22 days
Investment Rating BBB BBB
Weighted Average Interest Rate over Life 5.42% 5.42%
Principal Outstanding $ 20,898,432 $ 20,898,432