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Note 16: Derivatives and Hedging Activities: Agreements with Derivative Counterparties (Details) - USD ($)
$ in Thousands
Mar. 31, 2020
Dec. 31, 2019
Balance Sheet Hedge    
Derivative Counterparties Collateral $ 5,700 $ 30,900
Net Liability Position | Loan Level Swap | Commercial Lending Customer    
Termination Value of Derivatives With Derivative Dealer Counterparties $ 5,800 1,100
Net Asset Position | Balance Sheet Hedge    
Termination Value of Derivatives With Derivative Dealer Counterparties   $ 30,100