LHFI and ACL, LHFI - Additional Information (Details 2) $ in Thousands	3 Months Ended
	Mar. 31, 2024 USD ($) KeyRatio	Mar. 31, 2023 USD ($)	Dec. 31, 2023 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
LHFS past due 90 days or more	$ 56,500		$ 51,200
Percentage of outstanding principal to be repurchased under GNMA optional repurchase program	100.00%
Exposure for Modified Commercial Accrual Loans Deemed To Be Reviewed On Individual Basis	$ 500
Financing Receivable [Abstract]
PCL	7,708	$ 3,244
Troubled Debt Restructurings [Member]
Financing Receivable Recorded Investment [Line Items]
Amortized Cost Basis	2,274	876
Secured by Nonfarm, Nonresidential Properties [Member] | Other Real Estate Secured [Member]
Financing Receivable [Abstract]
PCL		3,300
Other Commercial Loans and Leases Financing Receivable [Member]
Financing Receivable [Abstract]
PCL	(992)	$ 1,063
Minimum [Member]
Financing Receivable [Abstract]
Credit amount used as baseline in evaluating loan policy	$ 100