Investments - Narrative (Details)	3 Months Ended	9 Months Ended
Sep. 30, 2025 USD ($) security	Sep. 30, 2024 USD ($)	Sep. 30, 2025 USD ($) security	Sep. 30, 2024 USD ($)	Dec. 31, 2024 USD ($) security
Debt Securities, Available-for-Sale [Line Items]
Pledged securities \| $	$ 0		$ 0		$ 0
Sale of AFS securities \| $	0	$ 0	0	$ 0
Accrued interest receivable on securities \| $	76,000		76,000		48,000
Allowance for credit losses on securities \| $	$ 0		$ 0		$ 0
Number of securities in unrealized loss position for less than 12 months \| security	0		0		1
Number of securities in unrealized loss position for more than 12 months \| security	16		16		15
Agency mortgage-backed securities
Debt Securities, Available-for-Sale [Line Items]
Number of portfolio securities \| security	11		11		11
Municipal bonds
Debt Securities, Available-for-Sale [Line Items]
Number of portfolio securities \| security	11		11		11

Number of U.S. agency and non-U.S. agency mortgage backed securities in the Company's portfolio.

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Amount of allowance for credit loss 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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Number of investments in debt securities measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for 12 months or longer, without an allowance for credit loss. Includes beneficial interest in securitized financial asset.

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Number of investments in debt securities measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for less than 12 months, without an allowance for credit loss. Includes beneficial interest in securitized financial asset.

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Amount of restricted 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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Amount, after allowance for credit loss, of accrued interest on investment in debt security measured at amortized cost (held-to-maturity).

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Amount of cash inflow from sale of 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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