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SIGNIFICANT ACCOUNTING POLICIES - Restricted Bank Stock (Details) - USD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023
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Changes in accumulated other comprehensive income (loss) by component, net of tax |  |
Restricted bank stock | $ 43.9 |
Investment in FHLB stock | 6.0 | $ 6.0
Federal Reserve Bank |  |
Changes in accumulated other comprehensive income (loss) by component, net of tax |  |
Restricted cash | $ 43.9 |

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