Note 8: Deposits: Schedule of Interest Expense on Deposit Liabilities (Details) - USD ($) $ in Thousands		12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Details
Interest Expense, Demand Deposit Accounts	$ 4,699	$ 3,888	$ 2,858
Interest Expense, Time Deposits	16,009	13,598	10,739
Interest Expense Domestic Deposit Liabilities, Withdrawal Penalties	(113)	(99)	(86)
Interest Expense, Customer Deposits	$ 20,595	$ 17,387	$ 13,511