Note 2: Investments in Securities: Schedule of Financial Instruments Owned and Pledged as Collateral (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Securities Pledged as Collateral
Securities Owned and Pledged As Collateral Amortized Cost	$ 197,317	$ 294,855
Security Owned and Pledged as Collateral, Fair Value	199,568	299,138
Public deposits
Securities Owned and Pledged As Collateral Amortized Cost	60,355	130,760
Security Owned and Pledged as Collateral, Fair Value	62,288	133,940
Collateralized Loan Obligations
Securities Owned and Pledged As Collateral Amortized Cost	131,813	160,130
Security Owned and Pledged as Collateral, Fair Value	131,950	161,145
Collateralized Securities, Other
Securities Owned and Pledged As Collateral Amortized Cost	5,149	3,965
Security Owned and Pledged as Collateral, Fair Value	$ 5,330	$ 4,053