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Note 2: Investments: Investments Classified by Contractual Maturity Date (Details) - USD ($)
Dec. 31, 2016
Dec. 31, 2015
AmortizedCost $ 184,979,644 $ 145,558,425
HeldToMaturitySecuritiesEstimatedFairValue 191,850,749 150,507,158
Redeemable Preferred Stock    
AmortizedCost 623,635 612,023
HeldToMaturitySecuritiesEstimatedFairValue 637,053 $ 641,698
Common Stock    
Available-for-sale Securities, Amortized Cost Basis 10,985,338  
AvailableForSaleSecuritiesEstimatedFairValue 10,573,356  
DueIn2017Member    
AmortizedCost 6,148,334  
HeldToMaturitySecuritiesEstimatedFairValue 6,232,674  
DueIn2018Through2021Member    
AmortizedCost 42,886,637  
HeldToMaturitySecuritiesEstimatedFairValue 44,879,897  
DueIn2022Through2026Member    
AmortizedCost 42,090,383  
HeldToMaturitySecuritiesEstimatedFairValue 43,288,035  
DueAfter2026Member    
AmortizedCost 83,742,572  
HeldToMaturitySecuritiesEstimatedFairValue 87,324,617  
Mortgage backed securities    
AmortizedCost 9,488,083  
HeldToMaturitySecuritiesEstimatedFairValue $ 9,488,473