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Loans, Allowance for Credit Losses, and Asset Quality Information - Narrative (Details) $ in Thousands |  | 12 Months Ended |  |
--- | --- | --- | --- | ---
Jan. 01, 2023 USD ($) | Dec. 31, 2023 USD ($) loan | Dec. 31, 2022 USD ($) loan | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($)
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |
Unamortized discount on acquired loans |  | $ 24,000 | $ 11,600 |  |
Loans |  | 8,150,102 | $ 6,665,145 |  |
Number of loans to debtors with nonperforming loans | loan |  |  | 1 |  |
Net book balance of individually evaluated loans on nonaccrual, threshold amount for designation as collateral dependent loans |  | 500 |  |  |
Revolving, converted to term loan |  | 25,900 | $ 7,900 |  |
Allowance for credit loss, fee, and loan in process |  | 8,150,280 | 6,666,548 |  |
Allowance for credit losses on loans |  | 109,853 | 90,967 | $ 78,789 | $ 52,388
Interest income on nonaccrual loans |  | 0 | 0 |  |
Grand South |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |
Loans reclassified from fair value mark to ACL resulting from PCD loans | $ 5,610 |  |  |  |
Allowance for credit loss, increase from acquisition, non-purchase | $ 12,200 |  |  |  |
SBA Loans |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |
Unamortized discount on acquired loans |  | 3,500 | 4,300 |  |
Asset Pledged as Collateral without Right |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |
Loans |  | 6,500,000 | 5,300,000 |  |
Commercial and industrial |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |
Allowance for credit loss, fee, and loan in process |  | 905,862 | 641,941 |  |
Allowance for credit losses on loans |  | 21,227 | 17,718 | 16,249 | 11,316
Consumer loans |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |
Allowance for credit loss, fee, and loan in process |  | 68,443 | 60,659 |  |
Allowance for credit losses on loans |  | 2,992 | 2,900 | 2,656 | $ 1,478
Special Mention Loans |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |
Allowance for credit loss, fee, and loan in process |  | 44,100 | 39,000 |  |
Special Mention Loans | Consumer loans |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |
Allowance for credit loss, fee, and loan in process |  | 0 | 0 |  |
Classified |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |
Allowance for credit loss, fee, and loan in process |  | 54,200 | 48,500 |  |
Classified | Consumer loans |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |
Allowance for credit loss, fee, and loan in process |  | $ 250 | 435 |  |
Real Estate |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |
Threshold percentage to write-off nonaccrual loans |  | 90.00% |  |  |
Real Estate | Receivable Benchmark | Collateral Type Concentration Risk |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |
Concentration risk percentage |  | 88.00% |  |  |
Hotel | Minimum |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |
Threshold percentage to write-off nonaccrual loans |  | 10.00% |  |  |
Hotel | Maximum |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |
Threshold percentage to write-off nonaccrual loans |  | 25.00% |  |  |
Non Real Estate |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |
Threshold percentage to write-off nonaccrual loans |  | 75.00% |  |  |
Management |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |
Loans |  | $ 63,700 | 6,000 |  |
Number of new loans to related parties | loan |  | 9 |  |  |
New loans to related parties |  | $ 58,500 |  |  |
Repayments received from related parties |  | 800 |  |  |
Management | Unused lines of Credit |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |
Financing receivable, excluding accrued interest, available credit |  | 2,700 | 1,200 |  |
Residential Mortgage Loans |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |
Presold mortgages in process of settlement |  | 1,000 | 800 |  |
Unfunded Loan Commitment |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |
Allowance for credit losses on loans |  | $ 11,369 | $ 13,306 | $ 13,506 |

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