Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Statement of Comprehensive Income [Abstract]
Net Income (loss)	$ 39,190	$ 19,748	$ 79,837	$ 30,515
Other comprehensive income (loss)
Change in net unrealized gain (loss) on investments	20,136	51,745	53,195	33,995
Change in net benefit asset plans and obligations	(724)	(724)	(2,172)	(2,172)
Foreign currency translation adjustment	(462)	853	2,244	865
Other comprehensive income (loss), before tax and reclassification adjustments	18,950	51,874	53,267	32,688
Income tax effect	(4,552)	(10,714)	(11,190)	(6,683)
Other comprehensive income (loss), after tax, before reclassification adjustments	14,398	41,160	42,077	26,005
Change in unrealized (gains) losses on investments included in net investment gains (losses)	405	1,680	2,161	5,473
Total reclassification adjustments, before tax	405	1,680	2,161	5,473
Income tax effect	(85)	(352)	(454)	(1,149)
Total reclassification adjustments, after tax	320	1,328	1,707	4,324
Comprehensive income (loss)	$ 53,908	$ 62,236	$ 123,621	$ 60,844