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Note 17: Commitments and Credit Risk: Lines of Credit (Details) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Letters of Credit Outstanding, Amount | $ 26,300 | $ 28,900
Commercial Lines of Credit |  |
Letters of Credit Outstanding, Amount | 1,200,000 | 1,100,000
Openend Consumer Lines of Credit |  |
Letters of Credit Outstanding, Amount | $ 155,800 | $ 150,900

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_FinancialInstrumentAxis=fil_CommercialLinesOfCreditMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=fil_OpenEndConsumerLinesOfCreditMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |