Note 4: Loans and Allowance for Loan Losses (Details) $ in Thousands		6 Months Ended
	Dec. 31, 2019 USD ($)	Dec. 31, 2019 USD ($)	Jun. 30, 2019 USD ($)
Financing Receivable, Credit Quality, Additional Information		lending relationships of $2 million or more, exclusive of any consumer or owner-occupied residential loan, are subject to an annual credit analysis which is prepared by the loan administration department and presented to a loan committee with appropriate lending authority. A sample of lending relationships in excess of $1 million (exclusive of single-family residential real estate loans) are subject to an independent loan review annually, in order to verify risk ratings
Number of Purchased Credit Impaired Loans	1
Foreclosed residential real estate properties physical possession	$ 823	$ 823	$ 752
Residential mortgage loans and home equity loans formal foreclosure proceedings in process	516	516	493
Loans without a specific valuation allowance
Purchased Credit Impaired Loans	24,100	24,100	$ 28,500
Financial Asset, Equal to or Greater than 90 Days Past Due
Purchased Credit Impaired Loans	$ 3,100	$ 3,100