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Mortgage-Backed Securities Carrying Value of Asset (Details) (USD $)
9 Months Ended 12 Months Ended
Sep. 30, 2013
Dec. 31, 2012
Schedule of Available-for-sale Securities [Line Items]    
Available-for-sale Securities, Amortized Cost Basis $ 50,907,980 $ 48,827,485
Unrealized Gain 225,478 1,165,695
Unrealized Loss (2,971,715) (4,289,886)
Available-for-sale Securities, Fair Value Disclosure, Mortgage-backed Securities 38,880,996 32,121,412
Trust Portfolio--MBS Bonds [Member]
   
Schedule of Available-for-sale Securities [Line Items]    
Available-for-sale Securities, Amortized Cost Basis 44,292,716 32,535,077
Unrealized Gain 0 0
Unrealized Loss (5,411,720) (413,665)
Available-for-sale Securities, Fair Value Disclosure, Mortgage-backed Securities 38,880,996 32,121,412
Trust Portfolio--MBS Bonds [Member] | Standard & Poor's, AA Rating [Member]
   
Schedule of Available-for-sale Securities [Line Items]    
Debt Instrument, Credit Rating "AA" [1] "AA" [1]
Available-for-sale Securities, Amortized Cost Basis 21,109,784 19,407,675
Unrealized Gain 0 0
Unrealized Loss (2,815,054) (284,052)
Available-for-sale Securities, Fair Value Disclosure, Mortgage-backed Securities 18,294,730 19,123,623
Trust Portfolio--MBS Bonds [Member] | Standard & Poor's, AAA Rating [Member]
   
Schedule of Available-for-sale Securities [Line Items]    
Debt Instrument, Credit Rating "AAA" [1] "AAA" [1]
Available-for-sale Securities, Amortized Cost Basis 23,182,932 13,127,402
Unrealized Gain 0 0
Unrealized Loss (2,596,666) (129,613)
Available-for-sale Securities, Fair Value Disclosure, Mortgage-backed Securities $ 20,586,266 $ 12,997,789
[1] (1) MBS are reported based on the lowest rating issued by a Rating Agency, if more than one rating is issued on the security, at the date presented.