Loans and Allowance for Loan Losses - Loans Modified in Troubled Debt Restructurings and Impaired (Details) - USD ($)	Jun. 30, 2020	Jun. 30, 2019
Commercial loans
Financing Receivable, Troubled Debt Restructuring	$ 3,200,000	$ 5,600,000
Residential Real Estate
Financing Receivable, Troubled Debt Restructuring	791,000	1,100,000
Commercial
Financing Receivable, Troubled Debt Restructuring	$ 4,500,000	$ 6,500,000