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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

X

- Definition

Amount of income (loss) from trading securities.

+ References

No definition available.

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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
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- Definition

Amount of realized gain (loss) on investment in debt security measured at fair value with change in fair value recognized in net income (trading).

+ References

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-Name Accounting Standards Codification
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-Paragraph 14
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-URI https://asc.fasb.org/1943274/2147481800/320-10-50-14

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- Definition

Amount of unrealized 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/2003/role/exampleRef
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- Definition

Amount of expenses related to the generation of investment income.

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