Investments - Debt Securities, Trading, and Equity Securities, FV-NI (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Fixed maturity securities, available-for-sale:
Amortized Cost	$ 1,320,266	$ 1,047,713
Gross Unrealized Gains	10,636	12,491
Gross Unrealized Losses	(38,684)	(42,553)
Allowance for Credit Losses	0	0
Total fixed maturity securities, available-for-sale	1,292,218	1,017,651
Fixed maturity securities, held-to-maturity:
Amortized Cost	39,396	43,315
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(436)	(1,969)
Allowance for Credit Losses	(243)	(329)
Total fixed maturity securities, held-to-maturity	38,717	41,017
U.S. government securities
Fixed maturity securities, available-for-sale:
Amortized Cost	26,577	44,685
Gross Unrealized Gains	35	202
Gross Unrealized Losses	(126)	(721)
Allowance for Credit Losses	0	0
Total fixed maturity securities, available-for-sale	26,486	44,166
Corporate securities and miscellaneous
Fixed maturity securities, available-for-sale:
Amortized Cost	433,298	392,773
Gross Unrealized Gains	5,618	6,408
Gross Unrealized Losses	(13,288)	(15,761)
Allowance for Credit Losses	0	0
Total fixed maturity securities, available-for-sale	425,628	383,420
Municipal securities
Fixed maturity securities, available-for-sale:
Amortized Cost	89,966	98,266
Gross Unrealized Gains	116	655
Gross Unrealized Losses	(5,366)	(6,143)
Allowance for Credit Losses	0	0
Total fixed maturity securities, available-for-sale	84,716	92,778
Residential mortgage-backed securities
Fixed maturity securities, available-for-sale:
Amortized Cost	408,585	292,568
Gross Unrealized Gains	1,875	3,556
Gross Unrealized Losses	(16,627)	(14,498)
Allowance for Credit Losses	0	0
Total fixed maturity securities, available-for-sale	393,833	281,626
Commercial mortgage-backed securities
Fixed maturity securities, available-for-sale:
Amortized Cost	70,262	31,411
Gross Unrealized Gains	545	449
Gross Unrealized Losses	(1,443)	(1,926)
Allowance for Credit Losses	0	0
Total fixed maturity securities, available-for-sale	69,364	29,934
Other asset-backed securities
Fixed maturity securities, available-for-sale:
Amortized Cost	291,578	188,010
Gross Unrealized Gains	2,447	1,221
Gross Unrealized Losses	(1,834)	(3,504)
Allowance for Credit Losses	0	0
Total fixed maturity securities, available-for-sale	292,191	185,727
Fixed maturity securities, held-to-maturity:
Amortized Cost	39,396	43,315
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(436)	(1,969)
Allowance for Credit Losses	(243)	(329)
Total fixed maturity securities, held-to-maturity	$ 38,717	$ 41,017

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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