Investments - Schedule of Available-for-Sale Investments (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Debt Securities, Available-for-sale [Line Items]
Total fixed maturity securities, Cost or Amortized Cost	$ 1,330,102
Total fixed maturity securities, available-for-sale	1,259,627	$ 1,189,733
Total fixed maturity securities, available-for-sale
Debt Securities, Available-for-sale [Line Items]
Total fixed maturity securities, Cost or Amortized Cost	1,330,102	1,278,337
Total fixed maturity securities, Gross Unrealized Gains	4,245	2,102
Total fixed maturity securities, Gross Unrealized Losses	(74,720)	(90,706)
Total fixed maturity securities, available-for-sale	1,259,627	1,189,733
State and municipal
Debt Securities, Available-for-sale [Line Items]
Total fixed maturity securities, Cost or Amortized Cost	224,185	223,009
Total fixed maturity securities, Gross Unrealized Gains	699	598
Total fixed maturity securities, Gross Unrealized Losses	(23,883)	(27,043)
Total fixed maturity securities, available-for-sale	201,001	196,564
Residential mortgage-backed
Debt Securities, Available-for-sale [Line Items]
Total fixed maturity securities, Cost or Amortized Cost	379,128	352,064
Total fixed maturity securities, Gross Unrealized Gains	751	32
Total fixed maturity securities, Gross Unrealized Losses	(19,650)	(25,869)
Total fixed maturity securities, available-for-sale	360,229	326,227
Corporate
Debt Securities, Available-for-sale [Line Items]
Total fixed maturity securities, Cost or Amortized Cost	543,057	503,610
Total fixed maturity securities, Gross Unrealized Gains	2,679	1,358
Total fixed maturity securities, Gross Unrealized Losses	(24,367)	(29,483)
Total fixed maturity securities, available-for-sale	521,369	475,485
Commercial mortgage and asset-backed
Debt Securities, Available-for-sale [Line Items]
Total fixed maturity securities, Cost or Amortized Cost	164,442	178,238
Total fixed maturity securities, Gross Unrealized Gains	110	112
Total fixed maturity securities, Gross Unrealized Losses	(6,579)	(7,892)
Total fixed maturity securities, available-for-sale	157,973	170,458
U.S. Treasury securities and obligations guaranteed by the U.S. government
Debt Securities, Available-for-sale [Line Items]
Total fixed maturity securities, Cost or Amortized Cost	19,290	21,416
Total fixed maturity securities, Gross Unrealized Gains	6	2
Total fixed maturity securities, Gross Unrealized Losses	(241)	(419)
Total fixed maturity securities, available-for-sale	$ 19,055	$ 20,999