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Summary of Significant Accounting Policies - Concentrations of Credit Risk (Details) $ in Thousands | 12 Months Ended
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Dec. 31, 2023 USD ($) item | Dec. 31, 2022
Concentrations of Credit Risk |  |
CDL Concentration Ratio (as percentage) | 59.70% | 64.80%
CRE Concentration Ratio (as percentage) | 236.50% | 249.00%
Concentrations of Credit Risk |  |
Concentrations of Credit Risk |  |
Concentration risk threshold, total risk-based capital threshold (as a percent) | 25.00% |
Loans. | Concentrations of Credit Risk |  |
Concentrations of Credit Risk |  |
Concentration risk threshold, total risk-based capital threshold | $ 1,200,000 |
Number of credit concentrations for non-acquired credit impaired loans | item | 8 |
Loans. | Concentrations of Credit Risk | non - real estate |  |
Concentrations of Credit Risk |  |
Concentration risk threshold, total risk-based capital threshold | $ 1,200,000 |
Loans. | Concentrations of Credit Risk | Lessors of nonresidential buildings |  |
Concentrations of Credit Risk |  |
Concentration risk threshold, total risk-based capital threshold | 6,200,000 |
Loans. | Concentrations of Credit Risk | Loans on owner occupied office buildings |  |
Concentrations of Credit Risk |  |
Concentration risk threshold, total risk-based capital threshold | 1,900,000 |
Loans. | Concentrations of Credit Risk | Other holding companies |  |
Concentrations of Credit Risk |  |
Concentration risk threshold, total risk-based capital threshold | 1,800,000 |
Loans. | Concentrations of Credit Risk | Lessors of residential and buildings |  |
Concentrations of Credit Risk |  |
Concentration risk threshold, total risk-based capital threshold | 2,400,000 |
Loans. | Concentrations of Credit Risk | Loans secured by jumbo |  |
Concentrations of Credit Risk |  |
Concentration risk threshold, total risk-based capital threshold | 8,800,000 |
Amount loaned | 726,200 |
Loans. | Concentrations of Credit Risk | Residential 1-4 family |  |
Concentrations of Credit Risk |  |
Concentration risk threshold, total risk-based capital threshold | 2,600,000 |
Loans. | Concentrations of Credit Risk | Business assets |  |
Concentrations of Credit Risk |  |
Concentration risk threshold, total risk-based capital threshold | $ 2,200,000 |

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- Definition Ratio of CDL concentration. + References No definition available. + Details
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- Definition Ratio of CRE concentration. + References No definition available. + Details
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- Definition Represents the concentration amount, for the entity that discloses a concentration risk in relation to quantitative amount, which serves as a benchmark (or denominator) in the equation. + References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 954 -SubTopic 310 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481027/954-310-50-2 + Details
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