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Investment Securities (Credit Quality Information) (Details) - USD ($) $ in Thousands | Mar. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Debt Securities, Held-to-Maturity, Credit Quality Indicator [Line Items] |  |
Amortized Cost | $ 503,938 | $ 513,282
Aaa |  |
Debt Securities, Held-to-Maturity, Credit Quality Indicator [Line Items] |  |
Amortized Cost | 488,297 | 498,631
Aa1 |  |
Debt Securities, Held-to-Maturity, Credit Quality Indicator [Line Items] |  |
Amortized Cost | 1,469 | 1,470
A3 |  |
Debt Securities, Held-to-Maturity, Credit Quality Indicator [Line Items] |  |
Amortized Cost | 4,000 | 4,000
Baa1 |  |
Debt Securities, Held-to-Maturity, Credit Quality Indicator [Line Items] |  |
Amortized Cost | 4,000 | 4,000
Baa2 |  |
Debt Securities, Held-to-Maturity, Credit Quality Indicator [Line Items] |  |
Amortized Cost | 500 | 500
NR |  |
Debt Securities, Held-to-Maturity, Credit Quality Indicator [Line Items] |  |
Amortized Cost | 5,672 | 4,681
U.S. Treasury and government agencies |  |
Debt Securities, Held-to-Maturity, Credit Quality Indicator [Line Items] |  |
Amortized Cost | 143,215 | 143,442
U.S. Treasury and government agencies | Aaa |  |
Debt Securities, Held-to-Maturity, Credit Quality Indicator [Line Items] |  |
Amortized Cost | 139,543 | 140,761
U.S. Treasury and government agencies | Aa1 |  |
Debt Securities, Held-to-Maturity, Credit Quality Indicator [Line Items] |  |
Amortized Cost | 0 | 0
U.S. Treasury and government agencies | A3 |  |
Debt Securities, Held-to-Maturity, Credit Quality Indicator [Line Items] |  |
Amortized Cost | 0 | 0
U.S. Treasury and government agencies | Baa1 |  |
Debt Securities, Held-to-Maturity, Credit Quality Indicator [Line Items] |  |
Amortized Cost | 0 | 0
U.S. Treasury and government agencies | Baa2 |  |
Debt Securities, Held-to-Maturity, Credit Quality Indicator [Line Items] |  |
Amortized Cost | 0 | 0
U.S. Treasury and government agencies | NR |  |
Debt Securities, Held-to-Maturity, Credit Quality Indicator [Line Items] |  |
Amortized Cost | 3,672 | 2,681
Mortgage-backed-residential |  |
Debt Securities, Held-to-Maturity, Credit Quality Indicator [Line Items] |  |
Amortized Cost | 348,754 | 357,870
Mortgage-backed-residential | Aaa |  |
Debt Securities, Held-to-Maturity, Credit Quality Indicator [Line Items] |  |
Amortized Cost | 348,754 | 357,870
Mortgage-backed-residential | Aa1 |  |
Debt Securities, Held-to-Maturity, Credit Quality Indicator [Line Items] |  |
Amortized Cost | 0 | 0
Mortgage-backed-residential | A3 |  |
Debt Securities, Held-to-Maturity, Credit Quality Indicator [Line Items] |  |
Amortized Cost | 0 | 0
Mortgage-backed-residential | Baa1 |  |
Debt Securities, Held-to-Maturity, Credit Quality Indicator [Line Items] |  |
Amortized Cost | 0 | 0
Mortgage-backed-residential | Baa2 |  |
Debt Securities, Held-to-Maturity, Credit Quality Indicator [Line Items] |  |
Amortized Cost | 0 | 0
Mortgage-backed-residential | NR |  |
Debt Securities, Held-to-Maturity, Credit Quality Indicator [Line Items] |  |
Amortized Cost | 0 | 0
States and political subdivisions |  |
Debt Securities, Held-to-Maturity, Credit Quality Indicator [Line Items] |  |
Amortized Cost | 1,469 | 1,470
States and political subdivisions | Aaa |  |
Debt Securities, Held-to-Maturity, Credit Quality Indicator [Line Items] |  |
Amortized Cost | 0 | 0
States and political subdivisions | Aa1 |  |
Debt Securities, Held-to-Maturity, Credit Quality Indicator [Line Items] |  |
Amortized Cost | 1,469 | 1,470
States and political subdivisions | A3 |  |
Debt Securities, Held-to-Maturity, Credit Quality Indicator [Line Items] |  |
Amortized Cost | 0 | 0
States and political subdivisions | Baa1 |  |
Debt Securities, Held-to-Maturity, Credit Quality Indicator [Line Items] |  |
Amortized Cost | 0 | 0
States and political subdivisions | Baa2 |  |
Debt Securities, Held-to-Maturity, Credit Quality Indicator [Line Items] |  |
Amortized Cost | 0 | 0
States and political subdivisions | NR |  |
Debt Securities, Held-to-Maturity, Credit Quality Indicator [Line Items] |  |
Amortized Cost | 0 | 0
Other debt securities |  |
Debt Securities, Held-to-Maturity, Credit Quality Indicator [Line Items] |  |
Amortized Cost | 10,500 | 10,500
Other debt securities | Aaa |  |
Debt Securities, Held-to-Maturity, Credit Quality Indicator [Line Items] |  |
Amortized Cost | 0 | 0
Other debt securities | Aa1 |  |
Debt Securities, Held-to-Maturity, Credit Quality Indicator [Line Items] |  |
Amortized Cost | 0 | 0
Other debt securities | A3 |  |
Debt Securities, Held-to-Maturity, Credit Quality Indicator [Line Items] |  |
Amortized Cost | 4,000 | 4,000
Other debt securities | Baa1 |  |
Debt Securities, Held-to-Maturity, Credit Quality Indicator [Line Items] |  |
Amortized Cost | 4,000 | 4,000
Other debt securities | Baa2 |  |
Debt Securities, Held-to-Maturity, Credit Quality Indicator [Line Items] |  |
Amortized Cost | 500 | 500
Other debt securities | NR |  |
Debt Securities, Held-to-Maturity, Credit Quality Indicator [Line Items] |  |
Amortized Cost | $ 2,000 | $ 2,000

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