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Note 16: Derivatives and Hedging Activities: Agreements with Derivative Counterparties (Details) - USD ($) $ in Millions | Sep. 30, 2020 | Dec. 31, 2019
--- | --- | ---
Balance Sheet Hedge |  |
Derivative Counterparties Collateral | $ 6.7 | $ 30.9
Net Liability Position | Loan Level Swap | Commercial Lending Customer |  |
Termination Value of Derivatives With Derivative Dealer Counterparties | $ 6.7 | 1.1
Net Asset Position | Balance Sheet Hedge |  |
Termination Value of Derivatives With Derivative Dealer Counterparties |  | $ 30.1

X
- Definition Represents the monetary amount of Derivative Counterparties Collateral, as of the indicated date. + References No definition available. + Details
Name: | fil_DerivativeCounterpartiesCollateral
Namespace Prefix: | fil_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Represents the monetary amount of Termination Value of Derivatives With Derivative Dealer Counterparties, as of the indicated date. + References No definition available. + Details
Name: | fil_TerminationValueOfDerivativesWithDerivativeDealerCounterparties
Namespace Prefix: | fil_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_BalanceSheetLocationAxis=fil_BalanceSheetHedgeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByAssetClassAxis=fil_NetLiabilityPositionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=fil_LoanLevelSwapMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis=fil_CommercialLendingCustomerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByAssetClassAxis=fil_NetAssetPositionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |