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Note 2: Investments in Securities: Other-than-temporary Impairment (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Details      
Other-than-temporary Impairment Loss, Debt Securities, Portion Recognized in Earnings $ 0 $ 0 $ 0