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Investment Securities, Equity Securities Changes in Fair Value Recognized in Net Income (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022 | Dec. 31, 2022
Debt and Equity Securities, FV-NI [Line Items] |  |  |  |  |
Net losses recognized during the period | $ (14) | $ (178) | $ (45) | $ (304) |
Less net gains recognized during the period on equity securities sold during the period | 0 | 0 | (61) | 0 |
Net unrealized gains (losses) recognized during the reporting period on equity securities still held at period end | (14) | $ (178) | 16 | $ (304) |
Equity Securities, Amortized Cost Basis | 1,409 |  | 1,409 |  | $ 2,207
Equity securities with a readily determinable fair value, at fair value | 1,279 |  | 1,279 |  | 2,273
Mutual funds [Member] |  |  |  |  |
Debt and Equity Securities, FV-NI [Line Items] |  |  |  |  |
Equity Securities, Amortized Cost Basis | 1,399 |  | 1,399 |  | 1,429
Equity securities with a readily determinable fair value, at fair value | 1,207 |  | 1,207 |  | 1,234
Equity securities [Member] |  |  |  |  |
Debt and Equity Securities, FV-NI [Line Items] |  |  |  |  |
Equity Securities, Amortized Cost Basis | 10 |  | 10 |  | 778
Equity securities with a readily determinable fair value, at fair value | $ 72 |  | $ 72 |  | $ 1,039

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