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Note 16: Derivatives and Hedging Activities: Nondesignated Hedges: Loans With Interest Rate Swap (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Dec. 31, 2018
Gain (Loss) on Fair Value Hedges Recognized in Earnings $ (44) $ 11 $ (68) $ 48  
Interest Rate Swap | Commercial Customers          
Derivative Asset, Notional Amount $ 69,600   $ 69,600   $ 78,500