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Note 2: Investments in Securities: Schedule of Available-for-sale Securities Reconciliation (Details) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Available-for-sale Securities, Amortized Cost Basis | $ 177,230 |
Available for Sale Securities Fair Value | 179,179 |
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises |  |
Available-for-sale Securities, Amortized Cost Basis | 123,300 | $ 146,491
Available for Sale Securities Gross Unrealized Gain | 871 | 1,045
Available for Sale Securities Gross Unrealized Losses | 1,638 | 1,501
Available for Sale Securities Fair Value | 122,533 | 146,035
US States and Political Subdivisions Debt Securities |  |
Available-for-sale Securities, Amortized Cost Basis | 53,930 | 64,682
Available for Sale Securities Gross Unrealized Gain | 2,716 | 3,163
Available for Sale Securities Gross Unrealized Losses | 0 | 8
Available for Sale Securities Fair Value | 56,646 | 67,837
Available-for-sale Securities |  |
Available-for-sale Securities, Amortized Cost Basis | 177,230 | 211,173
Available for Sale Securities Gross Unrealized Gain | 3,587 | 4,208
Available for Sale Securities Gross Unrealized Losses | 1,638 | 1,509
Available for Sale Securities Fair Value | $ 179,179 | $ 213,872

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