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Note 11: Income Taxes: Schedule of Effective Income Tax Rate Reconciliation (Details)
 3 Months Ended 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Details        
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent 35.00% 35.00% 35.00% 35.00%
NontaxableInterestAndDividends (4.30%) (1.60%) (4.30%) (2.60%)
TaxCredits (19.30%) (4.70%) (18.30%) (7.40%)
State taxes 1.90% 0.20% 1.70% 0.30%
Other taxes 0.50% 0.70% 0.40% 0.20%
Tax percentage rate 13.80% 29.60% 14.50% 25.50%