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Securities - Securities Sold (Details) - USD ($) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Carrying Value | $ 511,419,000 |  | $ 511,419,000 |
Net Proceeds | 488,981,000 | $ 0 | 488,981,000 | $ 0
(Loss) | (22,438,000) |  | (22,438,000) |
Obligations of other U.S. Government agencies and corporations |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Carrying Value | 170,000,000 |  | 170,000,000 |
Net Proceeds | 164,915,000 |  | 164,915,000 |
(Loss) | (5,085,000) |  | (5,085,000) |
Obligations of states and political subdivisions |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Carrying Value | 104,950,000 |  | 104,950,000 |
Net Proceeds | 99,439,000 |  | 99,439,000 |
(Loss) | (5,511,000) |  | (5,511,000) |
Residential mortgage backed securities: | Government agency mortgage backed securities |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Carrying Value | 137,196,000 |  | 137,196,000 |
Net Proceeds | 130,602,000 |  | 130,602,000 |
(Loss) | (6,594,000) |  | (6,594,000) |
Residential mortgage backed securities: | Government agency collateralized mortgage obligations |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Carrying Value | 54,028,000 |  | 54,028,000 |
Net Proceeds | 51,101,000 |  | 51,101,000 |
(Loss) | (2,927,000) |  | (2,927,000) |
Commercial mortgage backed securities: | Government agency mortgage backed securities |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Carrying Value | 5,048,000 |  | 5,048,000 |
Net Proceeds | 4,825,000 |  | 4,825,000 |
(Loss) | (223,000) |  | (223,000) |
Commercial mortgage backed securities: | Government agency collateralized mortgage obligations |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Carrying Value | 40,197,000 |  | 40,197,000 |
Net Proceeds | 38,099,000 |  | 38,099,000 |
(Loss) | $ (2,098,000) |  | $ (2,098,000) |

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