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Note 3: Loans and Allowance for Loan Losses: Troubled Debt Restructurings on Financing Receivables (Details) - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017
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Contractual Interest Rate Reduction | Land and Land Improvements |  |
Loan Restructuring, Trial Modifications, Amount | $ 0 |
Contractual Interest Rate Reduction | Residential one-to-four family |  |
Loan Restructuring, Trial Modifications, Amount | 1,348 |
Contractual Interest Rate Reduction | Commercial Real Estate |  |
Loan Restructuring, Trial Modifications, Amount | 0 | $ 0
Contractual Interest Rate Reduction | Consumer Loan |  |
Loan Restructuring, Trial Modifications, Amount | 0 | 0
Contractual Interest Rate Reduction | Modifications |  |
Loan Restructuring, Trial Modifications, Amount | 1,348 | 0
Contractual Interest Rate Reduction | Commercial business |  |
Loan Restructuring, Trial Modifications, Amount |  | 0
Extended Maturity | Land and Land Improvements |  |
Loan Restructuring, Trial Modifications, Amount | 31 |
Extended Maturity | Residential one-to-four family |  |
Loan Restructuring, Trial Modifications, Amount | 0 |
Extended Maturity | Commercial Real Estate |  |
Loan Restructuring, Trial Modifications, Amount | 0 | 0
Extended Maturity | Consumer Loan |  |
Loan Restructuring, Trial Modifications, Amount | 535 | 245
Extended Maturity | Modifications |  |
Loan Restructuring, Trial Modifications, Amount | 566 | 261
Extended Maturity | Commercial business |  |
Loan Restructuring, Trial Modifications, Amount |  | 16
Combination of Interest and Term | Land and Land Improvements |  |
Loan Restructuring, Trial Modifications, Amount | 0 |
Combination of Interest and Term | Residential one-to-four family |  |
Loan Restructuring, Trial Modifications, Amount | 0 |
Combination of Interest and Term | Commercial Real Estate |  |
Loan Restructuring, Trial Modifications, Amount | 106 | 5,759
Combination of Interest and Term | Consumer Loan |  |
Loan Restructuring, Trial Modifications, Amount | 0 | 0
Combination of Interest and Term | Modifications |  |
Loan Restructuring, Trial Modifications, Amount | 106 | 6,033
Combination of Interest and Term | Commercial business |  |
Loan Restructuring, Trial Modifications, Amount |  | 274
Loan Restructuring Modification | Land and Land Improvements |  |
Loan Restructuring, Trial Modifications, Amount | 31 |
Loan Restructuring Modification | Residential one-to-four family |  |
Loan Restructuring, Trial Modifications, Amount | 1,348 |
Loan Restructuring Modification | Commercial Real Estate |  |
Loan Restructuring, Trial Modifications, Amount | 106 | 5,759
Loan Restructuring Modification | Consumer Loan |  |
Loan Restructuring, Trial Modifications, Amount | 535 | 245
Loan Restructuring Modification | Modifications |  |
Loan Restructuring, Trial Modifications, Amount | $ 2,020 | 6,294
Loan Restructuring Modification | Commercial business |  |
Loan Restructuring, Trial Modifications, Amount |  | $ 290

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