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Investment Securities - Amortized cost of held to maturity debt securities (Details) - USD ($) $ in Thousands | Sep. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Schedule of Held-to-Maturity Securities [Line Items] |  |
Investment securities - HTM, Carrying Value | $ 60,283 | $ 61,878
AAA/AA/A |  |
Schedule of Held-to-Maturity Securities [Line Items] |  |
Investment securities - HTM, Carrying Value | 58,812 |
Unrated |  |
Schedule of Held-to-Maturity Securities [Line Items] |  |
Investment securities - HTM, Carrying Value | 1,471 |
U.S. Agency |  |
Schedule of Held-to-Maturity Securities [Line Items] |  |
Investment securities - HTM, Carrying Value | 2,500 | 2,500
U.S. Agency | AAA/AA/A |  |
Schedule of Held-to-Maturity Securities [Line Items] |  |
Investment securities - HTM, Carrying Value | 2,500 |
U.S. Agency mortgage-backed securities |  |
Schedule of Held-to-Maturity Securities [Line Items] |  |
Investment securities - HTM, Carrying Value | 19,582 | 18,877
U.S. Agency mortgage-backed securities | AAA/AA/A |  |
Schedule of Held-to-Maturity Securities [Line Items] |  |
Investment securities - HTM, Carrying Value | 19,582 |
Municipal |  |
Schedule of Held-to-Maturity Securities [Line Items] |  |
Investment securities - HTM, Carrying Value | 33,724 | 33,993
Municipal | AAA/AA/A |  |
Schedule of Held-to-Maturity Securities [Line Items] |  |
Investment securities - HTM, Carrying Value | 33,724 |
Corporate bonds and other securities |  |
Schedule of Held-to-Maturity Securities [Line Items] |  |
Investment securities - HTM, Carrying Value | 4,477 | $ 6,508
Corporate bonds and other securities | AAA/AA/A |  |
Schedule of Held-to-Maturity Securities [Line Items] |  |
Investment securities - HTM, Carrying Value | 3,006 |
Corporate bonds and other securities | Unrated |  |
Schedule of Held-to-Maturity Securities [Line Items] |  |
Investment securities - HTM, Carrying Value | $ 1,471 |

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