LHFI and ACL, LHFI - Impact of Modifications Classified as Troubled Debt Restructurings (Details) - Troubled Debt Restructurings [Member] - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Financing Receivable Modifications [Line Items]
Amortized Cost Basis	$ 916	$ 442	$ 2,668	$ 1,847
Pre-Modification Outstanding Recorded Investment	6,207		6,207	371
Post-Modification Outstanding Recorded Investment	$ 7,123	$ 442	$ 8,875	$ 2,218
% of Total Class of Loan	0.05%	0.00%	0.07%	0.02%
Other Secured by 1-4 Family Residential Properties [Member] \| Loans Secured by Real Estate [Member]
Financing Receivable Modifications [Line Items]
Amortized Cost Basis	$ 886	$ 96	$ 2,638	$ 494
Post-Modification Outstanding Recorded Investment	$ 886	$ 96	$ 2,638	$ 494
% of Total Class of Loan	0.14%	0.02%	0.41%	0.08%
Secured by Nonfarm, Nonresidential Properties [Member] \| Loans Secured by Real Estate [Member]
Financing Receivable Modifications [Line Items]
Amortized Cost Basis				$ 370
Post-Modification Outstanding Recorded Investment				$ 370
% of Total Class of Loan				0.01%
Secured by 1-4 Family Residential Properties [Member] \| Other Loans Secured by Real Estate [Member]
Financing Receivable Modifications [Line Items]
Amortized Cost Basis	$ 30	$ 346	$ 30	$ 912
Post-Modification Outstanding Recorded Investment	$ 30	$ 346	$ 30	$ 912
% of Total Class of Loan	0.00%	0.02%	0.00%	0.04%
Commercial and Industrial Loans [Member]
Financing Receivable Modifications [Line Items]
Pre-Modification Outstanding Recorded Investment	$ 6,207		$ 6,207	$ 255
Post-Modification Outstanding Recorded Investment	$ 6,207		$ 6,207	$ 255
% of Total Class of Loan	0.35%		0.35%	0.01%
Consumer Loans [Member]
Financing Receivable Modifications [Line Items]
Amortized Cost Basis				$ 40
Post-Modification Outstanding Recorded Investment				$ 40
% of Total Class of Loan				0.02%
Other Commercial Loans and Leases [Member]
Financing Receivable Modifications [Line Items]
Amortized Cost Basis				$ 31
Pre-Modification Outstanding Recorded Investment				116
Post-Modification Outstanding Recorded Investment				$ 147
% of Total Class of Loan				0.03%

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- Definition

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