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Note 17: Commitments and Credit Risk: Letters of Credit (Details) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Letters of Credit Outstanding, Amount | $ 26,300 | $ 28,900
Letters of Credit Terms Up to Five Years | 26,300 | 28,400
Letters of credit having terms over five years | 0 | 476
Guarantee the payment of principal and interest on a Multifamily Housing Refunding Revenue Bond Issue |  |
Letters of credit having terms over five years | $ 0 | $ 476

X
- Definition Represents the monetary amount of Letters of credit having terms over five years, as of the indicated date. + References No definition available. + Details
Name: | fil_LettersOfCreditHavingTermsOverFiveYears
Namespace Prefix: | fil_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Represents the monetary amount of Letters of Credit Terms Up to Five Years, as of the indicated date. + References No definition available. + Details
Name: | fil_LettersOfCreditTermsUpToFiveYears
Namespace Prefix: | fil_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The total amount of the contingent obligation under letters of credit outstanding as of the reporting date. + References No definition available. + Details
Name: | us-gaap_LettersOfCreditOutstandingAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_InvestmentTypeAxis=fil_GuaranteeThePaymentOfPrincipalAndInterestOnAMultifamilyHousingRefundingRevenueBondIssueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |