Investments - Schedule of Realized Gain (Loss) (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025
Fair Value at Sale
Fair value at sale	[1]	$ 30,533	$ 56,327	$ 71,607	$ 138,504
Fair value at sale	[1]	520	581	935	1,581
Net fair value at sale	[1]	31,053	56,908	72,542	140,085
Debt Securities, Available-for-Sale, Realized Gain		0	3	3,286	1,388
Debt Securities, Available-for-Sale, Realized Loss		(4)	(3)	(20)	(6)
Debt Securities, Available-for-Sale, Realized Gains (Losses)		(4)	0	3,266	1,382
Fixed Maturities
Fair Value at Sale
Fair value at sale	[1]	30,533	56,327	51,386	108,007
Fair value at sale	[1]	520	581	935	1,581
Debt Securities, Available-for-Sale, Realized Gain		0	3	6	5
Debt Securities, Available-for-Sale, Realized Loss		(4)	(3)	(20)	(6)
Equity Securities
Fair Value at Sale
Fair value at sale	[1]			15,021	9,998
Debt Securities, Available-for-Sale, Realized Gain				3,280	1,383
Short-term Investments
Fair Value at Sale
Fair value at sale	[1]	0	0	5,200	20,499
Debt Securities, Available-for-Sale, Realized Gain		0	0	$ 0	$ 0
Limited Partnership
Fair Value at Sale
Fair value at sale	[1]	0	0
Debt Securities, Available-for-Sale, Realized Gain		$ 0	$ 0

[1] Fair value at sale includes maturities and paydowns executed at par value.