Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 118,191	$ 61,957	$ (29,700)
Other comprehensive income (loss)
Change in net unrealized gain (loss) on investments	55,644	(13,466)	26,373
Change in net benefit asset plans and obligations	1,138	2,089	18,953
Foreign currency translation adjustment	2,337	(200)	0
Other comprehensive income (loss), before tax and reclassification adjustments	59,119	(11,577)	45,326
Income tax effect	(12,420)	2,388	(9,518)
Other comprehensive income (loss), after tax, before reclassification adjustments	46,699	(9,189)	35,808
Change in unrealized (gains) losses on investments included in net investment gains (losses)	3,822	6,791	718
Net benefit asset plans and obligations included in other underwriting expense	0	0	207
Total reclassification adjustments, before tax	3,822	6,791	925
Income tax effect	(803)	(1,426)	(194)
Total reclassification adjustments, after tax	3,019	5,365	731
Comprehensive income (loss)	$ 167,909	$ 58,133	$ 6,839