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Note 12: Subordinated Notes: Subordinated Notes Details (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Aug. 08, 2016
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Debt Instrument, Interest Rate Terms   The notes are due August 15, 2026, and have a fixed interest rate of 5.25% until August 15, 2021, at which time the rate becomes floating at a rate equal to three-month LIBOR plus 4.087%.      
Amortization of Debt Discount (Premium)   $ 38 $ 38 $ 116 $ 114
Subordinated Borrowing, Interest Rate   5.47%      
Senior Subordinated Notes          
Proceeds from Issuance of Senior Long-term Debt $ 73,500        
Payment of Financing and Stock Issuance Costs $ 1,500