Loans and Allowance for Credit Losses - Nonaccrual Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Jun. 30, 2021
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual loans	$ 6,133	$ 5,868
Residential Real Estate
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual loans	3,059	3,235
Construction Real Estate
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual loans		30
Commercial Real Estate
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual loans	1,950	1,914
Consumer loans
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual loans	65	100
Commercial loans
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual loans	$ 1,059	$ 589