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Note 18: Commitments and Credit Risk: Letters of Credit (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Details
Letters of Credit Outstanding, Amount	$ 20,000	$ 26,400
Letters of Credit Terms Up to Five Years	19,100	25,100
Letters of Credit Terms Over Five Years	$ 885	$ 1,300

X

- Definition

Represents the monetary amount of Letters of Credit Terms Over Five Years, as of the indicated date.

+ References

No definition available.

+ Details

Name:	fil_LettersOfCreditTermsOverFiveYears
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

- References

No definition available.

+ Details

Name:	us-gaap_TextBlockAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration