Investments - Schedule of Investments, Available-for-Sale Securities (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost	$ 583,671	$ 578,669
Gross Unrealized Gains	6,726	2,414
Gross Unrealized Losses	(1,279)	(3,395)
Estimated Fair Value	589,118	577,688
Corporate
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost	228,280	230,917
Gross Unrealized Gains	3,338	1,226
Gross Unrealized Losses	(284)	(954)
Estimated Fair Value	231,334	231,189
U.S. Treasury
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost	154,013	146,211
Gross Unrealized Gains	575	424
Gross Unrealized Losses	(234)	(760)
Estimated Fair Value	154,354	145,875
States and municipalities
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost	29,849	31,543
Gross Unrealized Gains	775	134
Gross Unrealized Losses	0	(92)
Estimated Fair Value	30,624	31,585
Foreign
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost	20,788	21,022
Gross Unrealized Gains	68	59
Gross Unrealized Losses	(4)	(24)
Estimated Fair Value	20,852	21,057
Asset-backed securities
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost	27,571	23,625
Gross Unrealized Gains	380	175
Gross Unrealized Losses	(50)	(120)
Estimated Fair Value	27,901	23,680
Mortgage-backed securities
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost	123,170	125,351
Gross Unrealized Gains	1,590	396
Gross Unrealized Losses	(707)	(1,445)
Estimated Fair Value	$ 124,053	$ 124,302

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) 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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