Note 3: Securities: Repurchase Agreements, Collateral, Policy (Details) - USD ($)	Mar. 31, 2020	Jun. 30, 2019
Assets Sold under Agreements to Repurchase, Carrying Amount	$ 130,100,000	$ 143,700,000
U.S. Government and Federal Agency Obligations
Assets Sold under Agreements to Repurchase, Carrying Amount	1,300,000	5,600,000
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises
Assets Sold under Agreements to Repurchase, Carrying Amount	50,800,000	47,300,000
Collateralized Mortgage Obligations
Assets Sold under Agreements to Repurchase, Carrying Amount	44,700,000	55,700,000
US States and Political Subdivisions Debt Securities
Assets Sold under Agreements to Repurchase, Carrying Amount	33,000,000.0	34,900,000
Other Securities
Assets Sold under Agreements to Repurchase, Carrying Amount	$ 200	$ 300