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Loans, Allowance for Credit Losses, and Asset Quality Information - Schedule of Analysis of Payment Status of Loans (Details) - USD ($) $ in Thousands | Mar. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Financing Receivable, Past Due [Line Items] |  |
Loans | $ 7,798,963 | $ 6,665,145
Nonaccrual loans | 28,059 | 28,514
Unamortized net deferred loan fees | (1,276) | (1,403)
Total | 7,800,239 | 6,666,548
Accruing 30-59 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Loans | 13,323 | 5,417
Accruing 60-89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Loans | 1,468 | 2,811
Accruing 90 Days or More Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Loans | 0 | 0
Current |  |
Financing Receivable, Past Due [Line Items] |  |
Loans | 7,757,389 | 6,629,806
Commercial, financial, and agricultural |  |
Financing Receivable, Past Due [Line Items] |  |
Nonaccrual loans | 10,788 | 10,229
Total | 885,032 | 641,941
Commercial, financial, and agricultural | Accruing 30-59 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Loans | 1,329 | 438
Commercial, financial, and agricultural | Accruing 60-89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Loans | 392 | 565
Commercial, financial, and agricultural | Accruing 90 Days or More Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Loans | 0 | 0
Commercial, financial, and agricultural | Current |  |
Financing Receivable, Past Due [Line Items] |  |
Loans | 872,523 | 630,709
Commercial, financial, and agricultural | Loans, Excluding Purchased Credit Impaired Loans |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 885,032 | 641,941
Real estate, commercial | Real estate – construction, land development & other land loans |  |
Financing Receivable, Past Due [Line Items] |  |
Nonaccrual loans | 123 | 1,009
Total | 1,092,026 | 934,176
Real estate, commercial | Real estate – construction, land development & other land loans | Accruing 30-59 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Loans | 233 | 238
Real estate, commercial | Real estate – construction, land development & other land loans | Accruing 60-89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Loans | 52 | 1,687
Real estate, commercial | Real estate – construction, land development & other land loans | Accruing 90 Days or More Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Loans | 0 | 0
Real estate, commercial | Real estate – construction, land development & other land loans | Current |  |
Financing Receivable, Past Due [Line Items] |  |
Loans | 1,091,618 | 931,242
Real estate, commercial | Real estate – construction, land development & other land loans | Loans, Excluding Purchased Credit Impaired Loans |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 1,092,026 | 934,176
Real estate, commercial | Real estate mortgage – commercial and other |  |
Financing Receivable, Past Due [Line Items] |  |
Nonaccrual loans | 12,155 | 12,505
Total | 4,026,258 | 3,510,261
Real estate, commercial | Real estate mortgage – commercial and other | Accruing 30-59 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Loans | 1,896 | 620
Real estate, commercial | Real estate mortgage – commercial and other | Accruing 60-89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Loans | 725 | 97
Real estate, commercial | Real estate mortgage – commercial and other | Accruing 90 Days or More Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Loans | 0 | 0
Real estate, commercial | Real estate mortgage – commercial and other | Current |  |
Financing Receivable, Past Due [Line Items] |  |
Loans | 4,011,482 | 3,497,039
Real estate, commercial | Real estate mortgage – commercial and other | Loans, Excluding Purchased Credit Impaired Loans |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 4,026,258 | 3,510,261
Real estate, mortgage | Real estate mortgage – residential (1-4 family) first mortgages |  |
Financing Receivable, Past Due [Line Items] |  |
Nonaccrual loans | 3,026 | 3,289
Total | 1,386,580 | 1,195,785
Real estate, mortgage | Real estate mortgage – residential (1-4 family) first mortgages | Accruing 30-59 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Loans | 8,806 | 3,415
Real estate, mortgage | Real estate mortgage – residential (1-4 family) first mortgages | Accruing 60-89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Loans | 95 | 25
Real estate, mortgage | Real estate mortgage – residential (1-4 family) first mortgages | Accruing 90 Days or More Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Loans | 0 | 0
Real estate, mortgage | Real estate mortgage – residential (1-4 family) first mortgages | Current |  |
Financing Receivable, Past Due [Line Items] |  |
Loans | 1,374,653 | 1,189,056
Real estate, mortgage | Real estate mortgage – residential (1-4 family) first mortgages | Loans, Excluding Purchased Credit Impaired Loans |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 1,386,580 | 1,195,785
Real estate, mortgage | Real estate mortgage – home equity loans / lines of credit |  |
Financing Receivable, Past Due [Line Items] |  |
Nonaccrual loans | 1,781 | 1,397
Total | 342,287 | 323,726
Real estate, mortgage | Real estate mortgage – home equity loans / lines of credit | Accruing 30-59 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Loans | 807 | 457
Real estate, mortgage | Real estate mortgage – home equity loans / lines of credit | Accruing 60-89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Loans | 139 | 371
Real estate, mortgage | Real estate mortgage – home equity loans / lines of credit | Accruing 90 Days or More Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Loans | 0 | 0
Real estate, mortgage | Real estate mortgage – home equity loans / lines of credit | Current |  |
Financing Receivable, Past Due [Line Items] |  |
Loans | 339,560 | 321,501
Real estate, mortgage | Real estate mortgage – home equity loans / lines of credit | Loans, Excluding Purchased Credit Impaired Loans |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 342,287 | 323,726
Consumer loans |  |
Financing Receivable, Past Due [Line Items] |  |
Nonaccrual loans | 186 | 85
Total | 68,056 | 60,659
Consumer loans | Accruing 30-59 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Loans | 252 | 249
Consumer loans | Accruing 60-89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Loans | 65 | 66
Consumer loans | Accruing 90 Days or More Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Loans | 0 | 0
Consumer loans | Current |  |
Financing Receivable, Past Due [Line Items] |  |
Loans | 67,553 | 60,259
Consumer loans | Loans, Excluding Purchased Credit Impaired Loans |  |
Financing Receivable, Past Due [Line Items] |  |
Total | $ 68,056 | $ 60,659

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