Note 3: Loans and Allowance for Loan Losses: Loans Modified in Troubled Debt Restructurings by Segment (Details) $ in Thousands	12 Months Ended
Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Troubled Debt Restructurings Total Modifications	$ 6,900	$ 15,000
Total Troubled Debt Restructurings Accruing Interest	$ 4,700	12,300
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	0
Substandard
Troubled Debt Restructurings	$ 2,500	8,800
Construction and land development
Troubled Debt Restructured Loans and Impaired	283	266
Single family residential
Troubled Debt Restructured Loans and Impaired	3,900
Commercial Real Estate
Troubled Debt Restructured Loans and Impaired	1,300	7,100
Commercial business
Troubled Debt Restructured Loans and Impaired	548	867
Consumer Loan
Troubled Debt Restructured Loans and Impaired	803	617
Troubled Debt Restructurings Returned to Accrual Status	$ 87
Single family and multi-family residential
Troubled Debt Restructured Loans and Impaired		$ 6,200

Represents the monetary amount of Total Troubled Debt Restructurings Accruing Interest, as of the indicated date.

No definition available.

Name:	fil_TotalTroubledDebtRestructuringsAccruingInterest
Namespace Prefix:	fil_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Represents the monetary amount of Troubled Debt Restructured Loans and Impaired, as of the indicated date.

+ References

No definition available.

+ Details

Name:	fil_TroubledDebtRestructuredLoansAndImpaired
Namespace Prefix:	fil_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Represents the monetary amount of Troubled Debt Restructurings, as of the indicated date.

+ References

No definition available.

+ Details

Name:	fil_TroubledDebtRestructurings
Namespace Prefix:	fil_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Represents the monetary amount of Troubled Debt Restructurings Returned to Accrual Status, during the indicated time period.

+ References

No definition available.

+ Details

Name:	fil_TroubledDebtRestructuringsReturnedToAccrualStatus
Namespace Prefix:	fil_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Represents the monetary amount of Troubled Debt Restructurings Total Modifications, as of the indicated date.

+ References

No definition available.

+ Details

Name:	fil_TroubledDebtRestructuringsTotalModifications
Namespace Prefix:	fil_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Number of financing receivables that have been modified by troubled debt restructurings within the previous 12 months and for which there was a payment default.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 34
-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953682-111524

+ Details

Name:	us-gaap_FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_InternalCreditAssessmentAxis=us-gaap_SubstandardMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancialInstrumentAxis=fil_ConstructionAndLandDevelopmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancialInstrumentAxis=fil_SingleFamilyResidentialMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_CommercialRealEstateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancialInstrumentAxis=fil_CommercialBusinessMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_ConsumerLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancialInstrumentAxis=fil_SingleFamilyAndMultiFamilyResidentialMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: