Note 3: Loans and Allowance for Loan Losses: Weighted Average Interest Rate on Loans Receivable (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Loans Receivable, Weighted Average Interest Rate	5.16%	4.74%
Commercial loan participations sold to other financial institutions	$ 181,500	$ 164,800
Residential mortgage loans sold	78,700	89,200
Unpaid principal balances
Loans serviced for others	260,200	254,000
Unused lines of Credit
Loans serviced for others	$ 121,000	$ 37,800