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, 2023	Sep. 30, 2023
Financing Receivable Modifications [Line Items]
Amortized Cost Basis	$ 442	$ 1,847
% of Total Class of Loan	0.00%	0.02%
Pre-Modification Outstanding Recorded Investment	$ 0	$ 371
Post-Modification Outstanding Recorded Investment	442	2,218
Other Secured by 1-4 Family Residential Properties [Member] | Loans Secured by Real Estate [Member]
Financing Receivable Modifications [Line Items]
Amortized Cost Basis	$ 96	$ 494
% of Total Class of Loan	0.02%	0.08%
Post-Modification Outstanding Recorded Investment	$ 96	$ 494
Secured by Nonfarm, Nonresidential Properties [Member] | Loans Secured by Real Estate [Member]
Financing Receivable Modifications [Line Items]
Amortized Cost Basis		$ 370
% of Total Class of Loan		0.01%
Post-Modification Outstanding Recorded Investment		$ 370
Secured by 1-4 Family Residential Properties [Member] | Other Loans Secured by Real Estate [Member]
Financing Receivable Modifications [Line Items]
Amortized Cost Basis	$ 346	$ 912
% of Total Class of Loan	0.02%	0.04%
Post-Modification Outstanding Recorded Investment	$ 346	$ 912
Commercial and Industrial Loans [Member]
Financing Receivable Modifications [Line Items]
% of Total Class of Loan		0.01%
Pre-Modification Outstanding Recorded Investment		$ 255
Post-Modification Outstanding Recorded Investment		255
Consumer Loans [Member]
Financing Receivable Modifications [Line Items]
Amortized Cost Basis		$ 40
% of Total Class of Loan		0.02%
Post-Modification Outstanding Recorded Investment		$ 40
Other Commercial Loans [Member]
Financing Receivable Modifications [Line Items]
Amortized Cost Basis		$ 31
% of Total Class of Loan		0.03%
Pre-Modification Outstanding Recorded Investment		$ 116
Post-Modification Outstanding Recorded Investment		$ 147