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Loans - Narrative (Details) - USD ($) | 9 Months Ended |
--- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Dec. 31, 2022
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Deferred loan costs | $ 23,100,000 |  | $ 22,700,000
Period of loan sold by mortgage company | 30 days |  |
Minimum period seldom held | 90 days |  |
Mortgage warehousing maximum pay off period | 30 days |  |
Nonaccrual interest income | $ 0 | $ 0 |
Non–accrual | 19,056,000 |  | 17,630,000
Non-performing TDRs |  |  | $ 1,500,000
Minimum |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Loans with an aggregate credit exposure | $ 3,000,000 |  |
Loans classified as TDR after a period (in days) | 90 days |  |
Minimum | Good Pass |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Number of consecutive years of profit for good pass rating (in years) | 3 years |  |
Number of consecutive years of profit unaudited financial information for good pass rating (in years) | 5 years |  |
Number of years of satisfactory relationship with bank for good pass rating (in years) | 5 years |  |
Maximum |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Loans with an aggregate credit exposure | $ 6,000,000 |  |
Loans classified as TDR after a period (in days) | 120 days |  |
Maximum | Satisfactory Pass |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Minimum number of years of satisfactory repayment required for satisfactory pass rating (in years) | 2 years |  |

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