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Note 4: Acquired Loans, Loss Sharing Agreements and FDIC Indemnification Assets: Business Combinations Policy: Business Acquisition, InterBank Assets Acquired and Liabilities Assumed (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
InterBank      
Premium Recorded in Conjunction with Fair Value of Acquired Loans and Amount Amortized to Yield $ 175 $ 269 $ 359