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Loans, Allowance for Credit Losses, and Asset Quality Information - Schedule of Activity in Allowance for Loan Losses for Loans (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2023 | Mar. 31, 2022 | Dec. 31, 2022
Accounts Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Beginning balance | $ 90,967 | $ 78,789 | $ 78,789
"Day 1" ACL for acquired PCD loans | 5,610 |  |
Charge-offs | (2,621) | (1,043) | (4,465)
Recoveries | 989 | 823 | 4,043
Provisions/(Reversals) | 11,451 | 3,500 | 12,600
Ending balance | 106,396 | 82,069 | 90,967
Commercial, financial, and agricultural |  |  |
Accounts Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Beginning balance | 17,718 | 16,249 | 16,249
"Day 1" ACL for acquired PCD loans | 5,197 |  |
Charge-offs | (2,177) | (790) | (2,519)
Recoveries | 274 | 247 | 756
Provisions/(Reversals) | 2,061 | 307 | 3,232
Ending balance | 23,073 | 16,013 | 17,718
Real estate, commercial | Real estate – construction, land development & other land loans |  |  |
Accounts Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Beginning balance | 15,128 | 16,519 | 16,519
"Day 1" ACL for acquired PCD loans | 49 |  |
Charge-offs | 0 | 0 | 0
Recoveries | 65 | 137 | 480
Provisions/(Reversals) | 3,744 | (599) | (1,871)
Ending balance | 18,986 | 16,057 | 15,128
Real estate, commercial | Real estate mortgage – commercial and other |  |  |
Accounts Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Beginning balance | 40,709 | 30,342 | 30,342
"Day 1" ACL for acquired PCD loans | 242 |  |
Charge-offs | (235) | (45) | (1,063)
Recoveries | 434 | 155 | 1,983
Provisions/(Reversals) | 4,126 | 6,875 | 9,447
Ending balance | 45,276 | 37,327 | 40,709
Real estate, mortgage | Real estate mortgage – residential (1-4 family) first mortgages |  |  |
Accounts Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Beginning balance | 11,354 | 8,686 | 8,686
"Day 1" ACL for acquired PCD loans | 113 |  |
Charge-offs | 0 | 0 | 0
Recoveries | 146 | 4 | 17
Provisions/(Reversals) | 672 | (531) | 2,651
Ending balance | 12,285 | 8,159 | 11,354
Real estate, mortgage | Real estate mortgage – home equity loans / lines of credit |  |  |
Accounts Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Beginning balance | 3,158 | 4,337 | 4,337
"Day 1" ACL for acquired PCD loans | 8 |  |
Charge-offs | (2) | (41) | (43)
Recoveries | 34 | 233 | 600
Provisions/(Reversals) | 283 | (2,455) | (1,736)
Ending balance | 3,481 | 2,074 | 3,158
Consumer loans |  |  |
Accounts Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Beginning balance | 2,900 | 2,656 | 2,656
"Day 1" ACL for acquired PCD loans | 1 |  |
Charge-offs | (207) | (167) | (840)
Recoveries | 36 | 47 | 207
Provisions/(Reversals) | 565 | (97) | 877
Ending balance | $ 3,295 | $ 2,439 | $ 2,900

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