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Loans and Allowance for Credit Losses - Real Estate Foreclosures (Details) - USD ($)
Sep. 30, 2021
Jun. 30, 2021
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Repossessed assets $ 635,000 $ 622,000
Residential Real Estate | Home Equity Loan    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Foreclosure proceedings in process $ 247,000 $ 533,000