Note 3: Loans and Allowance for Loan Losses: Weighted Average Interest Rate on Loans Receivable (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Loans Receivable, Weighted Average Interest Rate	4.97%	5.16%
Commercial loan participations sold to other financial institutions	$ 283,000	$ 181,500
Residential mortgage loans sold	66,900	78,700
Unpaid principal balances
Loans serviced for others	349,900	260,200
Unused lines of Credit
Loans serviced for others	$ 102,100	$ 121,000