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Note 7: Investments in Limited Partnerships: Investments in Affordable Housing Partnerships Policy (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Details |  |  |
Number of Investments in Affordable Housing Partnerships | 13 fil_NumberOfInvestmentsInAffordableHousingPartnerships | 15 fil_NumberOfInvestmentsInAffordableHousingPartnerships |
Investments in Affordable Housing Partnerships Carrying Value, Net | $ 29,600 fil_InvestmentsInAffordableHousingPartnershipsCarryingValueNet | $ 34,200 fil_InvestmentsInAffordableHousingPartnershipsCarryingValueNet |
Federal Affordable Housing Tax Credits | 38,700 fil_FederalAffordableHousingTaxCredits |  |
Expected Amortization of Investments in Affordable Housing Partnerships | 29,500 fil_ExpectedAmortizationOfInvestmentsInAffordableHousingPartnerships |  |
Usage of Federal Affordable Housing Tax Credits | 6,000 fil_UsageOfFederalAffordableHousingTaxCredits | 7,100 fil_UsageOfFederalAffordableHousingTaxCredits | 5,200 fil_UsageOfFederalAffordableHousingTaxCredits
Actual Amortization of Investments in Affordable Housing Partnerships | $ 4,700 fil_ActualAmortizationOfInvestmentsInAffordableHousingPartnerships | $ 5,000 fil_ActualAmortizationOfInvestmentsInAffordableHousingPartnerships | $ 4,600 fil_ActualAmortizationOfInvestmentsInAffordableHousingPartnerships

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