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Note 13: Income Taxes: Schedule of Effective Income Tax Rate Reconciliation (Details)
3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Details        
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent 35.00% 35.00% 35.00% 35.00%
Effective Income Tax Rate Reconciliation, Tax Exempt Income, Percent (2.50%) (3.10%) (2.40%) (3.30%)
Effective Income Tax Rate Reconciliation, Tax Credit, Percent (8.10%) (8.40%) (8.10%) (9.20%)
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent 1.00% 1.70% 1.10% 1.50%
Effective Income Tax Rate Reconciliation, Other Adjustments, Percent (0.40%) 0.20% (0.30%) 0.40%
Effective Income Tax Rate Reconciliation, Percent 25.00% 25.40% 25.30% 24.40%