LHFI and ACL, LHFI - Additional Information (Details 2)	3 Months Ended		9 Months Ended
	Mar. 31, 2023 USD ($)	Mar. 31, 2022 USD ($)	Sep. 30, 2022 USD ($) KeyRatio	Dec. 31, 2022 USD ($)
Financing Receivable Recorded Investment [Line Items]
Number of days used as baseline in evaluating collateral documentation exceptions for loan policy	90 days
Number of key quality ratios | KeyRatio			6
Exposure for commercial non accrual loans to be reviewed on individual basis			$ 500,000
Exposure for commercial accrual loans deemed to be reviewed on individual basis			500,000
LHFS past due 90 days or more	$ 41,500,000			$ 49,300,000
Percentage of outstanding principal to be repurchased under GNMA optional repurchase program	100.00%
Financing Receivable [Abstract]
PCL	$ 3,244,000	$ (860,000)
Other Construction [Member]
Financing Receivable [Abstract]
PCL		8,000,000.0
Secured by 1-4 Family Residential Properties [Member]
Financing Receivable [Abstract]
PCL		2,900,000
Nonfarm Nonresidential Properties and Other Real Estate Secured [Member]
Financing Receivable [Abstract]
PCL	3,300,000
Commercial and Industrial Loans [Member]
Financing Receivable [Abstract]
PCL	(523,000)	3,803,000
State and Other Political Subdivision Loans [Member]
Financing Receivable [Abstract]
PCL	(156,000)	(337,000)
Other Commercial Loans [Member]
Financing Receivable [Abstract]
PCL	$ 1,063,000	$ (863,000)
Minimum [Member]
Financing Receivable [Abstract]
Credit amount used as baseline in evaluating loan policy			$ 100,000