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Loans - Narrative (Details) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2024 USD ($) modified_loan loan | Mar. 31, 2023 USD ($) | Dec. 31, 2023 USD ($) loan
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items] |  |  |
Accrued interest receivable for loans | $ | $ 8,800 |  | $ 8,800
Outstanding balance of high risk loans, minimum | $ | 500 |  |
Interest income | $ | $ 55 | $ 154 |
Loan contracts restructured | modified_loan | 3 |  |
Number of loans that subsequently defaulted | loan | 0 |  | 0
Commercial, financial & agricultural | Term Extension and Payment Delay |  |  |
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items] |  |  |
Term extension from modification | 5 years |  |
Commercial real estate | Term Extension |  |  |
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items] |  |  |
Loan contracts restructured | modified_loan | 2 |  |
Term extension from modification | 1 year |  |
Commercial real estate | Term Extension and Payment Delay |  |  |
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items] |  |  |
Loan contracts restructured | modified_loan | 1 |  |

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