Investments, Debt and Equity Securities in-text (Details) - USD ($)	3 Months Ended	6 Months Ended
Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025	Dec. 31, 2025
Investments, Debt and Equity Securities [Abstract]
Debt Securities, Available-for-sale, Allowance for Credit Loss, Writeoff	$ 0	$ 0	$ 0	$ 0
Debt and Equity Securities, FV-NI [Line Items]
Investment related gains (losses), net	$ (1,494,000)	2,408,000	$ (510,000)	(486,000)
Debt security maturities rated investment grade, percent	98.70%		98.70%		98.70%
Debt Securities, Available-for-sale, Allowance for Credit Loss, Writeoff	$ 0	0	$ 0	0
Equity Securities
Debt and Equity Securities, FV-NI [Line Items]
Investment related gains (losses), net	$ (200,000)	$ (16,000)	$ (100,000)	$ 31,000

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details