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Loans and Allowance for Credit Losses - Narrative (Details) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2024 USD ($) loan category | Mar. 31, 2023 USD ($) loan | Dec. 31, 2023 USD ($)
Financing Receivable, Impaired [Line Items] |  |  |
Foreclosed properties held | $ 800 |  |
Number of points in internal risk rating system | category | 9 |  |
Number of categories in internal risk rating system considered as not criticized | category | 6 |  |
Commercial relationship credit review threshold amount | $ 1,000 |  |
Liability for unfunded commitments | 1,000 |  | $ 1,000
Charge-offs | $ 2,150 | $ 4,847 | 18,479
Number of loans modified in period | loan | 6 | 0 |
Number of borrowers with modified loans | loan | 6 |  |
Total | $ 1,377 |  |
Minimum |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Percentage of commercial outstanding loan balances | 40.00% |  |
Maximum |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Percentage of commercial outstanding loan balances | 45.00% |  |
Residential real estate |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Number foreclosed properties held | loan | 1,000,000 |  |
Investment in loans in the process of foreclosure | $ 200 |  |
Charge-offs | 0 | $ 22 | 400
Total | $ 0 |  |
Total commercial |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Number foreclosed properties held | loan | 2 |  |
Charge-offs | $ 981 | 141 |
Total | 1,377 |  |
Total commercial | Subprime Consumer Automotive Segment |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Charge-offs | $ 600 |  |
Charge-off percentage | 27.00% |  |
Total commercial | Funded Loan |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Charge-offs | $ 400 |  |
Charge-off percentage | 18.00% |  |
Total commercial | Business |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Charge-offs | $ 981 | 141 | 4,572
Total | $ 1,377 |  |
Total commercial | Business | Government-Guaranteed Collateral |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Number of loans modified in period | loan | 6 |  |
Total | $ 1,400 |  |
Consumer |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Charge-offs | 1,169 | $ 4,684 | $ 13,507
Total | 0 |  |
Consumer | Subprime Consumer Automotive Segment |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Charge-offs | $ 1,200 |  |
Charge-off percentage | 55.00% |  |

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