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Investment Securities, Equity Securities with Readily Determinable Fair Values and Other Investments (Unrealized and realized gains and losses recognized in net income on equity securities ) (Details) - USD ($) | 3 Months Ended |
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Mar. 31, 2023 | Mar. 31, 2022 | Dec. 31, 2022
Investment Securities, Equity Securities with Readily Determinable Fair Values and Other Investments |  |  |
Equity Securities | $ 5,392,000 |  | $ 5,358,000
Summary of unrealized and realized gains and losses recognized in net income on equity securities |  |  |
Net gains (losses) recognized during the period on equity securities | 34,000 | $ (269,000) |
Unrealized gain on equity securities with readily determinable fair values | $ 34,000 | $ (269,000) |

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