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Loans - Schedule of recorded investment in nonaccrual restructured and loans 90 days past due and accruing (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Financing Receivable, Impaired [Line Items] |  |
Financing Receivable, Nonaccrual | $ 79,696 | $ 72,722
Financing Receivable, Troubled Debt Restructuring | 20,134 | 28,323
Financing Receivable, 90 Days or More Past Due, Still Accruing | 1,281 | 1,607
Financing Receivable Recorded Investment Nonperforming | 101,111 | 102,652
Commercial Financial And Agricultural [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Financing Receivable, Nonaccrual | 38,158 | 13,271
Financing Receivable, Troubled Debt Restructuring | 3,261 | 9,396
Financing Receivable, 90 Days or More Past Due, Still Accruing | 0 | 0
Financing Receivable Recorded Investment Nonperforming | 41,419 | 22,667
PPP Loans |  |
Financing Receivable, Impaired [Line Items] |  |
Financing Receivable, Nonaccrual | 0 | 0
Financing Receivable, Troubled Debt Restructuring | 0 | 0
Financing Receivable, 90 Days or More Past Due, Still Accruing | 389 | 793
Financing Receivable Recorded Investment Nonperforming | 389 | 793
Bank Overdrafts |  |
Financing Receivable, Impaired [Line Items] |  |
Financing Receivable, Nonaccrual | 0 | 0
Financing Receivable, Troubled Debt Restructuring | 0 | 0
Financing Receivable, 90 Days or More Past Due, Still Accruing | 0 | 0
Financing Receivable Recorded Investment Nonperforming | 0 | 0
Commercial Real Estate Portfolio Segment [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Financing Receivable, Nonaccrual | 24,504 | 40,142
Financing Receivable, Troubled Debt Restructuring | 7,919 | 7,713
Financing Receivable, 90 Days or More Past Due, Still Accruing | 0 | 0
Financing Receivable Recorded Investment Nonperforming | 32,423 | 47,855
Construction Real Estate Remaining Commercial [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Financing Receivable, Nonaccrual | 1,712 | 52
Financing Receivable, Troubled Debt Restructuring | 0 | 169
Financing Receivable, 90 Days or More Past Due, Still Accruing | 0 | 0
Financing Receivable Recorded Investment Nonperforming | 1,712 | 221
Construction Real Estate Retail |  |
Financing Receivable, Impaired [Line Items] |  |
Financing Receivable, Nonaccrual | 1,254 |
Financing Receivable, Troubled Debt Restructuring | 12 |
Financing Receivable, 90 Days or More Past Due, Still Accruing | 0 |
Financing Receivable Recorded Investment Nonperforming | 1,266 |
Construction Real Estate Mortgage [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Financing Receivable, Nonaccrual |  | 716
Financing Receivable, Troubled Debt Restructuring |  | 9
Financing Receivable, 90 Days or More Past Due, Still Accruing |  | 0
Financing Receivable Recorded Investment Nonperforming |  | 725
Residential Real Estate Commercial [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Financing Receivable, Nonaccrual | 1,894 | 2,366
Financing Receivable, Troubled Debt Restructuring | 298 | 240
Financing Receivable, 90 Days or More Past Due, Still Accruing | 0 | 0
Financing Receivable Recorded Investment Nonperforming | 2,192 | 2,606
Residential Real Estate Mortgage [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Financing Receivable, Nonaccrual | 9,260 | 11,718
Financing Receivable, Troubled Debt Restructuring | 6,750 | 7,779
Financing Receivable, 90 Days or More Past Due, Still Accruing | 182 | 372
Financing Receivable Recorded Investment Nonperforming | 16,192 | 19,869
Residential Real Estate Home Equity Line Of Credit [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Financing Receivable, Nonaccrual | 1,133 | 1,590
Financing Receivable, Troubled Debt Restructuring | 187 | 803
Financing Receivable, 90 Days or More Past Due, Still Accruing | 7 | 0
Financing Receivable Recorded Investment Nonperforming | 1,327 | 2,393
Residential Real Estate Installment [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Financing Receivable, Nonaccrual | 51 | 82
Financing Receivable, Troubled Debt Restructuring | 1,037 | 1,508
Financing Receivable, 90 Days or More Past Due, Still Accruing | 0 | 0
Financing Receivable Recorded Investment Nonperforming | 1,088 | 1,590
Consumer Portfolio Segment [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Financing Receivable, Nonaccrual | 1,012 | 1,518
Financing Receivable, Troubled Debt Restructuring | 670 | 700
Financing Receivable, 90 Days or More Past Due, Still Accruing | 703 | 431
Financing Receivable Recorded Investment Nonperforming | 2,385 | 2,649
GFSC loans |  |
Financing Receivable, Impaired [Line Items] |  |
Financing Receivable, Nonaccrual | 10 | 79
Financing Receivable, Troubled Debt Restructuring | 0 | 6
Financing Receivable, 90 Days or More Past Due, Still Accruing | 0 | 11
Financing Receivable Recorded Investment Nonperforming | 10 | 96
Check Loans |  |
Financing Receivable, Impaired [Line Items] |  |
Financing Receivable, Nonaccrual | 0 | 0
Financing Receivable, Troubled Debt Restructuring | 0 | 0
Financing Receivable, 90 Days or More Past Due, Still Accruing | 0 | 0
Financing Receivable Recorded Investment Nonperforming | 0 | 0
Finance Leases Portfolio Segment [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Financing Receivable, Nonaccrual | 708 | 1,188
Financing Receivable, Troubled Debt Restructuring | 0 | 0
Financing Receivable, 90 Days or More Past Due, Still Accruing | 0 | 0
Financing Receivable Recorded Investment Nonperforming | $ 708 | $ 1,188

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