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Note 12: Income Taxes: Schedule of Effective Income Tax Rate Reconciliation (Details)
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Details    
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent 35.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate 35.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
Effective Income Tax Rate Reconciliation, Tax Exempt Income, Percent (2.90%)us-gaap_EffectiveIncomeTaxRateReconciliationTaxExemptIncome (3.70%)us-gaap_EffectiveIncomeTaxRateReconciliationTaxExemptIncome
Effective Income Tax Rate Reconciliation, Tax Credit, Percent (8.30%)us-gaap_EffectiveIncomeTaxRateReconciliationTaxCredits (10.20%)us-gaap_EffectiveIncomeTaxRateReconciliationTaxCredits
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent 1.10%us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes 1.20%us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes
Effective Income Tax Rate Reconciliation, Other Adjustments, Percent 0.10%us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments (0.30%)us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments
Effective Income Tax Rate Reconciliation, Percent 25.00%us-gaap_EffectiveIncomeTaxRateContinuingOperations 22.00%us-gaap_EffectiveIncomeTaxRateContinuingOperations