Note 17: Derivatives and Hedging Activities: Schedule of Derivative Instruments, Effect on Statements of Operations (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Interest Income | Interest Rate Swap
Effect of cash flow hedge accounting on the statements of operations	$ 673
Interest Income | Interest Rate Cap
Effect of cash flow hedge accounting on the statements of operations		$ 0	$ 0
Interest Expense | Interest Rate Swap
Effect of cash flow hedge accounting on the statements of operations	$ 0
Interest Expense | Interest Rate Cap
Effect of cash flow hedge accounting on the statements of operations		$ 244	$ 225