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Investment Securities - Net gain on trading securities (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2025
Investment Securities |  |
Net realized gain on sales | $ 128 | $ 166
Net unrealized (loss) gain | (28) | 7
Net gain on trading securities | 100 | 173
Less: Portfolio expenses and management fees | 45 | 83
Trading securities revenue | $ 55 | $ 90

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- Definition Amount of unrealized and realized gain (loss) on investment in debt security measured at fair value with change in fair value recognized in net income (trading). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 14 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-14 + Details
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