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Note 15: Disclosures About Fair Value of Financial Instruments: Fair Value, Assets Measured on Recurring Basis (Details) - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises |  |
Recurring Assets, Fair Value Disclosure | $ 153,258 | $ 122,533
Collateralized Mortgage Obligations |  |
Recurring Assets, Fair Value Disclosure | 39,260 |
US States and Political Subdivisions Debt Securities |  |
Recurring Assets, Fair Value Disclosure | 51,450 | 56,646
Interest rate derivative asset |  |
Recurring Assets, Fair Value Disclosure | 12,800 | 981
Interest rate derivative liability |  |
Recurring Assets, Fair Value Disclosure | (716) | (1,030)
Fair Value, Inputs, Level 1 | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises |  |
Recurring Assets, Fair Value Disclosure | 0 | 0
Fair Value, Inputs, Level 1 | Collateralized Mortgage Obligations |  |
Recurring Assets, Fair Value Disclosure | 0 |
Fair Value, Inputs, Level 1 | US States and Political Subdivisions Debt Securities |  |
Recurring Assets, Fair Value Disclosure | 0 | 0
Fair Value, Inputs, Level 1 | Interest rate derivative asset |  |
Recurring Assets, Fair Value Disclosure | 0 | 0
Fair Value, Inputs, Level 1 | Interest rate derivative liability |  |
Recurring Assets, Fair Value Disclosure | 0 | 0
Fair Value, Inputs, Level 2 | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises |  |
Recurring Assets, Fair Value Disclosure | 153,258 | 122,533
Fair Value, Inputs, Level 2 | Collateralized Mortgage Obligations |  |
Recurring Assets, Fair Value Disclosure | 39,260 |
Fair Value, Inputs, Level 2 | US States and Political Subdivisions Debt Securities |  |
Recurring Assets, Fair Value Disclosure | 51,450 | 56,646
Fair Value, Inputs, Level 2 | Interest rate derivative asset |  |
Recurring Assets, Fair Value Disclosure | 12,800 | 981
Fair Value, Inputs, Level 2 | Interest rate derivative liability |  |
Recurring Assets, Fair Value Disclosure | (716) | (1,030)
Fair Value, Inputs, Level 3 | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises |  |
Recurring Assets, Fair Value Disclosure | 0 | 0
Fair Value, Inputs, Level 3 | Collateralized Mortgage Obligations |  |
Recurring Assets, Fair Value Disclosure | 0 |
Fair Value, Inputs, Level 3 | US States and Political Subdivisions Debt Securities |  |
Recurring Assets, Fair Value Disclosure | 0 | 0
Fair Value, Inputs, Level 3 | Interest rate derivative asset |  |
Recurring Assets, Fair Value Disclosure | 0 | 0
Fair Value, Inputs, Level 3 | Interest rate derivative liability |  |
Recurring Assets, Fair Value Disclosure | $ 0 | $ 0

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