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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: