Note 15: Derivatives and Hedging Activities: Schedule of Derivative Instruments in Statement of Financial Position, Fair Value (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Derivative Asset
Derivative Instruments Not Designated as Hedging Instruments, Asset, at Fair Value	$ 1,453	$ 981
Derivative Liability
Derivative Instruments Not Designated as Hedging Instruments, Liability, at Fair Value	1,448	1,030
Interest rate products | Prepaid Expenses and Other Current Assets
Derivative Asset
Derivative Instruments Not Designated as Hedging Instruments, Asset, at Fair Value	1,453	981
Interest rate products | Accrued expenses and other liabilities
Derivative Liability
Derivative Instruments Not Designated as Hedging Instruments, Liability, at Fair Value	$ 1,448	$ 1,030