Note 4: Loans and Allowance for Loan Losses: CARES Act (Details) - COVID-19 - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Sep. 30, 2020	Jun. 30, 2020
Financing Receivables Past Due
Loans With Option to Temporarily suspended loans	$ 0
Financing Receivables Current
Loans With Option to Temporarily suspended loans	$ 93,600	$ 380,100
Financial Asset, 30 to 59 Days Past Due | Residential Real Estate
Loans With Option to Temporarily suspended loans		1
Financial Asset, 30 to 59 Days Past Due | Consumer Loan
Loans With Option to Temporarily suspended loans		29,000
Financial Asset, 60 to 89 Days Past Due | Commercial Loan
Loans With Option to Temporarily suspended loans		$ 66