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Investments in debt and equity securities - Gross Unrealized Gains and Losses (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Debt Securities, Available-for-sale [Line Items]
Gains	$ 7,378	$ 3,509
Losses	7,806	16,181
Municipal
Debt Securities, Available-for-sale [Line Items]
Gains	5	1
Losses	33	149
Corporate
Debt Securities, Available-for-sale [Line Items]
Gains	1,766	524
Losses	4,467	9,232
Foreign
Debt Securities, Available-for-sale [Line Items]
Gains	5,100	2,979
Losses	3,104	5,607
U.S. Treasury Bonds
Debt Securities, Available-for-sale [Line Items]
Gains	507	5
Losses	$ 202	$ 1,193

X

- Definition

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

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Amount, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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