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Securities (Narrative) (Details) | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2024 USD ($) security | Mar. 31, 2024 USD ($) | Jun. 30, 2024 USD ($) security | Jun. 30, 2023 USD ($) | Dec. 31, 2023 USD ($) security
Debt and Equity Securities, FV-NI [Line Items] |  |  |  |  |
Private mortgage-backed security fair value | $ 700,000 |  | $ 700,000 |  |
Debt securities, available-for-sale and held-to-maturity, number of positions | security | 621 |  | 621 |  | 657
Number of securities held in an unrealized loss position | security | 600 |  | 600 |  | 632
Investment securities, pledged as collateral for public deposits | $ 874,100,000 |  | $ 874,100,000 |  | $ 971,300,000
Gain on sale of VISA B shares |  |  | 4,500,000 |  |
Proceeds from sales of securities available for sale | 138,200,000 |  | 138,182,000 | $ 111,862,000 |
Securities losses, net | (4,700,000) |  | (4,700,000) |  |
Proceeds from maturities, calls and principal repayments of securities available for sale |  | $ 5,200,000 | 167,698,000 | $ 96,686,000 |
Losses on calls of securities, net |  | $ (975,000) |  |  |
FHLB stock and FRB stock, cost | 41,400,000 |  | 41,400,000 |  | 54,500,000
FHLB, cost | 8,500,000 |  | 8,500,000 |  | 21,700,000
FRB stock | 32,900,000 |  | 32,900,000 |  | 32,800,000
Collateral For FRB Borrowings |  |  |  |  |
Debt and Equity Securities, FV-NI [Line Items] |  |  |  |  |
Investment securities, pledged as collateral for public deposits | 627,000,000.0 |  | $ 627,000,000.0 |  | $ 679,000,000.0
Common Class B |  |  |  |  |
Debt and Equity Securities, FV-NI [Line Items] |  |  |  |  |
Gain on sale of VISA B shares | $ 4,500,000 |  |  |  |

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