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LHFI and ACL, LHFI - Troubled debt restructurings on financial effect (Details) - Troubled Debt Restructurings [Member] | 12 Months Ended
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Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
Secured by Nonfarm, Nonresidential Properties [Member] | Loans Secured by Real Estate [Member] |  |  |
Financing Receivable, Modified [Line Items] |  |  |
Financial Effect - Term Extension |  |  | One loan renewed and extended maturity by six months
Secured by 1-4 Family Residential Properties [Member] | Other Loans Secured By Real Estate [Member] |  |  |
Financing Receivable, Modified [Line Items] |  |  |
Financial Effect - Term Extension | Re-amortized seventy-two loans with term adjusted by a weighted-average of 37 months | Modified nine loans to amortize over weighted average 35 months | Extended amortization with term adjusted by weighted-average 3.4 years
Weighted average amortization period |  |  | 3 years 4 months 24 days
Other Secured by 1-4 Family Residential Properties [Member] | Loans Secured by Real Estate [Member] |  |  |
Financing Receivable, Modified [Line Items] |  |  |
Financial Effect - Term Extension | Modified five loans and forty-four lines of credit to amortize over 24 month terms | Modified five loans and twenty-five lines of credit to amortize over 24 month terms | Modified lines of credit to amortize over 12 month and 24 month terms
Other Real Estate Secured [Member] | Loans Secured by Real Estate [Member] |  |  |
Financing Receivable, Modified [Line Items] |  |  |
Financial Effect - Term Extension | Extended maturity of one loan by 12 months |  |
Commercial and Industrial Loans [Member] |  |  |
Financing Receivable, Modified [Line Items] |  |  |
Financial Effect - Payment Delay | One loan with eight monthly interest payments deferred and four loans with three interest-only monthly payments | Thirty-four month principal payment deferral | Six month payment deferrals
Other Commercial Loans and Leases [Member] |  |  |
Financing Receivable, Modified [Line Items] |  |  |
Financial Effect - Term Extension |  |  | One loan renewed and extended maturity by seven months
Financial Effect - Payment Delay |  |  | Six month payment deferrals
Consumer Loans [Member] |  |  |
Financing Receivable, Modified [Line Items] |  |  |
Financial Effect - Term Extension |  |  | Bankruptcies extended amortization with term adjusted by weighted average 1.3 years reducing borrower payment
Weighted average amortization period |  |  | 1 year 3 months 18 days

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