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Loans and Asset Quality Information - Summary of Major Categories of Total Loans Outstanding (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Loans and Leases Receivable Disclosure [Line Items] |  |  |
Loans | $ 6,083,419 | $ 4,735,013 | $ 4,451,525
Unamortized net deferred loan (fees) costs | (1,704) | (3,698) | (1,941)
Total loans | $ 6,081,715 | $ 4,731,315 | 4,453,466
Financing Receivable | Loan Category Concentration Risk |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |
Percentage | 100.00% | 100.00% |
Total non-PPP SBA loans included in the table above |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |
Total loans | $ 171,149 | $ 169,662 |
Guaranteed portions of non-PPP SBA Loans included in table above |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |
Total loans | 48,377 | 33,959 |
Unguaranteed portions of non-PPP SBA Loans included in table above |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |
Total loans | 122,772 | 135,703 |
Sold portions of SBA loans with servicing retained - not included in table above |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |
Total loans | 414,240 | 395,398 |
Commercial, financial, and agricultural |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |
Loans | $ 648,997 | $ 782,549 | 504,271
Commercial, financial, and agricultural | Financing Receivable | Loan Category Concentration Risk |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |
Percentage | 11.00% | 17.00% |
Real estate, commercial | Real estate – construction, land development & other land loans |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |
Loans | $ 828,549 | $ 570,672 | 530,866
Real estate, commercial | Real estate – construction, land development & other land loans | Financing Receivable | Loan Category Concentration Risk |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |
Percentage | 13.00% | 12.00% |
Real estate, commercial | Real estate – mortgage – commercial and other |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |
Loans | $ 3,194,737 | $ 2,049,203 | 1,917,280
Real estate, commercial | Real estate – mortgage – commercial and other | Financing Receivable | Loan Category Concentration Risk |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |
Percentage | 53.00% | 43.00% |
Real estate, mortgage | Real estate – mortgage – residential (1-4 family) first mortgages |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |
Loans | $ 1,021,966 | $ 972,378 | 1,105,014
Real estate, mortgage | Real estate – mortgage – residential (1-4 family) first mortgages | Financing Receivable | Loan Category Concentration Risk |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |
Percentage | 17.00% | 21.00% |
Real estate, mortgage | Real estate – mortgage – home equity loans / lines of credit |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |
Loans | $ 331,932 | $ 306,256 | 337,922
Real estate, mortgage | Real estate – mortgage – home equity loans / lines of credit | Financing Receivable | Loan Category Concentration Risk |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |
Percentage | 5.00% | 6.00% |
Consumer loans |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |
Loans | $ 57,238 | $ 53,955 | $ 56,172
Consumer loans | Financing Receivable | Loan Category Concentration Risk |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |
Percentage | 1.00% | 1.00% |

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