Note 4: Loans and Allowance for Loan Losses: Schedule of Debtor Troubled Debt Restructuring, Current Period (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Total loans
Financing Receivable, Modifications, Number of Contracts	6	0	10	0
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 1,689	$ 0	$ 3,060	$ 0
Consumer Loan
Financing Receivable, Modifications, Number of Contracts	0	0	0	0
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 0	$ 0	$ 0	$ 0
Commercial Loan
Financing Receivable, Modifications, Number of Contracts	1	0	2	0
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 20	$ 0	$ 89	$ 0
Construction Loan Payable
Financing Receivable, Modifications, Number of Contracts	0	0	0	0
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 0	$ 0	$ 0	$ 0
Residential Real Estate
Financing Receivable, Modifications, Number of Contracts	1	0	1	0
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 707	$ 0	$ 707	$ 0
Commercial Real Estate
Financing Receivable, Modifications, Number of Contracts	4	0	7	0
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 962	$ 0	$ 2,264	$ 0