LHFI and ACL, LHFI - Troubled Debt Restructuring Related to Loans Held for Investment, Excluding Covered Loans, by Loan Type (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]
Total	$ 442	$ 2,218
Past Due 30 to 59 Days [Member]
Financing Receivable Modifications [Line Items]
Total	0	462
Past Due 60 to 89 Days [Member]
Financing Receivable Modifications [Line Items]
Total	0	0
Past Due
Financing Receivable Modifications [Line Items]
Total	0	462
Current Loans
Financing Receivable Modifications [Line Items]
Total	442	1,756
Other Secured by 1-4 Family Residential Properties [Member] | Loans Secured by Real Estate [Member]
Financing Receivable Modifications [Line Items]
Total	96	494
Other Secured by 1-4 Family Residential Properties [Member] | Loans Secured by Real Estate [Member] | Past Due 30 to 59 Days [Member]
Financing Receivable Modifications [Line Items]
Total	0	272
Other Secured by 1-4 Family Residential Properties [Member] | Loans Secured by Real Estate [Member] | Past Due 60 to 89 Days [Member]
Financing Receivable Modifications [Line Items]
Total	0	0
Other Secured by 1-4 Family Residential Properties [Member] | Loans Secured by Real Estate [Member] | Past Due
Financing Receivable Modifications [Line Items]
Total	0	272
Other Secured by 1-4 Family Residential Properties [Member] | Loans Secured by Real Estate [Member] | Current Loans
Financing Receivable Modifications [Line Items]
Total	96	222
Secured by Nonfarm, Nonresidential Properties [Member] | Loans Secured by Real Estate [Member]
Financing Receivable Modifications [Line Items]
Total		370
Secured by Nonfarm, Nonresidential Properties [Member] | Loans Secured by Real Estate [Member] | Current Loans
Financing Receivable Modifications [Line Items]
Total		370
Secured by 1-4 Family Residential Properties [Member] | Other Loans Secured by Real Estate [Member]
Financing Receivable Modifications [Line Items]
Total	346	912
Secured by 1-4 Family Residential Properties [Member] | Other Loans Secured by Real Estate [Member] | Past Due 30 to 59 Days [Member]
Financing Receivable Modifications [Line Items]
Total		170
Secured by 1-4 Family Residential Properties [Member] | Other Loans Secured by Real Estate [Member] | Past Due
Financing Receivable Modifications [Line Items]
Total		170
Secured by 1-4 Family Residential Properties [Member] | Other Loans Secured by Real Estate [Member] | Current Loans
Financing Receivable Modifications [Line Items]
Total	$ 346	742
Commercial and Industrial Loans [Member]
Financing Receivable Modifications [Line Items]
Total		255
Commercial and Industrial Loans [Member] | Current Loans
Financing Receivable Modifications [Line Items]
Total		255
Consumer Loans [Member]
Financing Receivable Modifications [Line Items]
Total		40
Consumer Loans [Member] | Past Due 30 to 59 Days [Member]
Financing Receivable Modifications [Line Items]
Total		20
Consumer Loans [Member] | Past Due
Financing Receivable Modifications [Line Items]
Total		20
Consumer Loans [Member] | Current Loans
Financing Receivable Modifications [Line Items]
Total		20
Other Commercial Loans [Member]
Financing Receivable Modifications [Line Items]
Total		147
Other Commercial Loans [Member] | Current Loans
Financing Receivable Modifications [Line Items]
Total		$ 147