Investments - Schedule of Gross Unrealized Losses and Fair Value for Available-for-Sale Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Fixed maturity securities
Debt Securities, Available-for-sale [Line Items]
Fixed maturity securities, less than 12 months, fair value	$ 159,643	$ 390,579
Fixed maturity securities, less than 12 months, gross unrealized losses	(826)	(10,833)
Fixed maturity securities, 12 months or more, fair value	621,814	621,786
Fixed maturity securities, 12 months or more, gross unrealized losses	(53,229)	(79,873)
Fixed maturity securities, fair value	781,457	1,012,365
Fixed maturity securities, gross unrealized losses	(54,055)	(90,706)
State and municipal
Debt Securities, Available-for-sale [Line Items]
Fixed maturity securities, less than 12 months, fair value	26,425	35,979
Fixed maturity securities, less than 12 months, gross unrealized losses	(369)	(1,087)
Fixed maturity securities, 12 months or more, fair value	152,646	146,547
Fixed maturity securities, 12 months or more, gross unrealized losses	(18,684)	(25,956)
Fixed maturity securities, fair value	179,071	182,526
Fixed maturity securities, gross unrealized losses	(19,053)	(27,043)
Residential mortgage-backed
Debt Securities, Available-for-sale [Line Items]
Fixed maturity securities, less than 12 months, fair value	63,405	179,807
Fixed maturity securities, less than 12 months, gross unrealized losses	(193)	(5,285)
Fixed maturity securities, 12 months or more, fair value	171,993	140,559
Fixed maturity securities, 12 months or more, gross unrealized losses	(13,402)	(20,584)
Fixed maturity securities, fair value	235,398	320,366
Fixed maturity securities, gross unrealized losses	(13,595)	(25,869)
Corporate
Debt Securities, Available-for-sale [Line Items]
Fixed maturity securities, less than 12 months, fair value	61,910	149,149
Fixed maturity securities, less than 12 months, gross unrealized losses	(243)	(4,281)
Fixed maturity securities, 12 months or more, fair value	214,235	220,743
Fixed maturity securities, 12 months or more, gross unrealized losses	(16,941)	(25,202)
Fixed maturity securities, fair value	276,145	369,892
Fixed maturity securities, gross unrealized losses	(17,184)	(29,483)
Commercial mortgage and asset-backed
Debt Securities, Available-for-sale [Line Items]
Fixed maturity securities, less than 12 months, fair value	7,662	17,991
Fixed maturity securities, less than 12 months, gross unrealized losses	(19)	(65)
Fixed maturity securities, 12 months or more, fair value	78,130	101,525
Fixed maturity securities, 12 months or more, gross unrealized losses	(4,140)	(7,827)
Fixed maturity securities, fair value	85,792	119,516
Fixed maturity securities, gross unrealized losses	(4,159)	(7,892)
U.S. Treasury securities and obligations guaranteed by the U.S. government
Debt Securities, Available-for-sale [Line Items]
Fixed maturity securities, less than 12 months, fair value	241	7,653
Fixed maturity securities, less than 12 months, gross unrealized losses	(2)	(115)
Fixed maturity securities, 12 months or more, fair value	4,810	12,412
Fixed maturity securities, 12 months or more, gross unrealized losses	(62)	(304)
Fixed maturity securities, fair value	5,051	20,065
Fixed maturity securities, gross unrealized losses	$ (64)	$ (419)