Loans, Allowance for Credit Losses, and Asset Quality Information - Accrued Interest Receivable Written Off (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Sep. 30, 2023
Financing Receivable, Allowance for Credit Loss [Line Items]
Accrued interest receivable written off	$ 400	$ 156	$ 642
Commercial and industrial
Financing Receivable, Allowance for Credit Loss [Line Items]
Accrued interest receivable written off	216	123	225
Real estate, commercial | Construction, development & other land loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Accrued interest receivable written off	0	0	10
Real estate, commercial | Commercial real estate - owner occupied
Financing Receivable, Allowance for Credit Loss [Line Items]
Accrued interest receivable written off	148	11	124
Real estate, commercial | Commercial real estate - non owner occupied
Financing Receivable, Allowance for Credit Loss [Line Items]
Accrued interest receivable written off	0	5	186
Real estate, mortgage | Residential 1-4 family real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Accrued interest receivable written off	29	8	38
Real estate, mortgage | Home equity loans/lines of credit
Financing Receivable, Allowance for Credit Loss [Line Items]
Accrued interest receivable written off	7	9	57
Consumer loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Accrued interest receivable written off	$ 0	$ 0	$ 2