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3) Investments: Investments Classified by Contractual Maturity Date (Details) (USD $)
Jun. 30, 2013
Dec. 31, 2012
Amortized Cost $ 142,895,203 $ 129,449,410
HeldToMaturitySecuritiesEstimatedFairValue 153,923,566 146,217,089
Available-for-sale Securities, Amortized Cost Basis 5,614,466  
AvailableForSaleSecuritiesEstimatedFairValue 5,090,494  
Collateralized Mortgage Backed Securities
   
Amortized Cost 5,290,909 5,010,519
HeldToMaturitySecuritiesEstimatedFairValue 5,571,293 5,262,334
Redeemable Preferred Stock
   
Amortized Cost 687,118 1,510,878
HeldToMaturitySecuritiesEstimatedFairValue 731,522 1,607,765
Nonredeemable Preferred Stock
   
Available-for-sale Securities, Amortized Cost Basis   20,281
AvailableForSaleSecuritiesEstimatedFairValue   18,795
Common Stock
   
Available-for-sale Securities, Amortized Cost Basis 5,614,466  
AvailableForSaleSecuritiesEstimatedFairValue 5,090,494  
Due in 2013
   
Amortized Cost 1,452,716  
HeldToMaturitySecuritiesEstimatedFairValue 1,470,386  
DueIn2014Through2017Member
   
Amortized Cost 20,953,006  
HeldToMaturitySecuritiesEstimatedFairValue 22,670,126  
DueIn2018Through2022Member
   
Amortized Cost 45,701,322  
HeldToMaturitySecuritiesEstimatedFairValue 50,130,774  
DueAfter2022Member
   
Amortized Cost 68,810,132  
HeldToMaturitySecuritiesEstimatedFairValue $ 73,349,465