Investments - Schedule of Available-for-Sale Investments (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Debt Securities, Available-for-sale [Line Items]
Total fixed maturity securities, Cost or Amortized Cost	$ 1,364,455
Total fixed maturity securities, available-for-sale	1,300,217	$ 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	1,364,455	1,278,337
Total fixed maturity securities, Gross Unrealized Gains	6,010	2,102
Total fixed maturity securities, Gross Unrealized Losses	(70,248)	(90,706)
Total fixed maturity securities, available-for-sale	1,300,217	1,189,733
State and municipal
Debt Securities, Available-for-sale [Line Items]
Total fixed maturity securities, Cost or Amortized Cost	222,687	223,009
Total fixed maturity securities, Gross Unrealized Gains	689	598
Total fixed maturity securities, Gross Unrealized Losses	(23,886)	(27,043)
Total fixed maturity securities, available-for-sale	199,490	196,564
Residential mortgage-backed
Debt Securities, Available-for-sale [Line Items]
Total fixed maturity securities, Cost or Amortized Cost	415,523	352,064
Total fixed maturity securities, Gross Unrealized Gains	1,071	32
Total fixed maturity securities, Gross Unrealized Losses	(19,484)	(25,869)
Total fixed maturity securities, available-for-sale	397,110	326,227
Corporate
Debt Securities, Available-for-sale [Line Items]
Total fixed maturity securities, Cost or Amortized Cost	545,680	503,610
Total fixed maturity securities, Gross Unrealized Gains	4,062	1,358
Total fixed maturity securities, Gross Unrealized Losses	(21,234)	(29,483)
Total fixed maturity securities, available-for-sale	528,508	475,485
Commercial mortgage and asset-backed
Debt Securities, Available-for-sale [Line Items]
Total fixed maturity securities, Cost or Amortized Cost	162,123	178,238
Total fixed maturity securities, Gross Unrealized Gains	181	112
Total fixed maturity securities, Gross Unrealized Losses	(5,487)	(7,892)
Total fixed maturity securities, available-for-sale	156,817	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	18,442	21,416
Total fixed maturity securities, Gross Unrealized Gains	7	2
Total fixed maturity securities, Gross Unrealized Losses	(157)	(419)
Total fixed maturity securities, available-for-sale	$ 18,292	$ 20,999