LHFI and ACL, LHFI - Troubled Debt Restructuring Related to Loans Held for Investment, Excluding Covered Loans, by Loan Type (Details) - Troubled Debt Restructurings [Member] $ in Thousands	Mar. 31, 2023 USD ($)
Financing Receivable Modifications [Line Items]
Total	$ 876
Current Loans
Financing Receivable Modifications [Line Items]
Total	876
Secured by Nonfarm, Nonresidential Properties [Member] | Loans Secured by Real Estate [Member] | Loans Held for Investment [Member]
Financing Receivable Modifications [Line Items]
Total	384
Secured by Nonfarm, Nonresidential Properties [Member] | Loans Secured by Real Estate [Member] | Current Loans
Financing Receivable Modifications [Line Items]
Total	384
Secured by 1-4 Family Residential Properties [Member] | Other Loans Secured by Real Estate [Member] | Loans Held for Investment [Member]
Financing Receivable Modifications [Line Items]
Total	492
Secured by 1-4 Family Residential Properties [Member] | Other Loans Secured by Real Estate [Member] | Current Loans
Financing Receivable Modifications [Line Items]
Total	$ 492