Consolidated Statements of Income and Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Revenues
Net premiums earned	$ 951,541	$ 962,823	$ 1,055,082
Investment income, net of investment expenses	44,932	55,778	39,670
Net investment gains (losses) (includes reclassifications for net unrealized gains (losses) on available-for-sale securities of $(1,323)in 2022; $2,256 in 2021; and $1,750 in 2020 previously included in accumulated other comprehensive income)	(15,892)	47,383	(32,395)
Other income (loss)	(295)	207	6,270
Total revenues	980,286	1,066,191	1,068,627
Benefits, losses and expenses
Losses and loss settlement expenses	637,301	652,155	869,467
Amortization of deferred policy acquisition costs	213,075	203,432	210,252
Other underwriting expenses (includes reclassifications for employee benefit costs of $(3,601) in 2022; $(6,603) in 2021; and $(4,289) in 2020 previously included in accumulated other comprehensive income)	114,645	110,574	143,332
Goodwill impairment	0	0	15,091
Interest Expense	3,188	3,187	0
Total benefits, losses and expenses	968,209	969,348	1,238,142
Income (loss) before income taxes	12,077	96,843	(169,515)
Federal income tax expense (benefit) (includes reclassifications of $1,034 in 2022; $913 in 2021 and $534 in 2020 previously included in accumulated other comprehensive income)	(2,954)	16,249	(56,809)
Net income (loss)	15,031	80,594	(112,706)
Other comprehensive income (loss)
Change in net unrealized appreciation on investments	(176,181)	(39,901)	47,054
Change in liability for underfunded employee benefit plans	(8,278)	19,633	18,456
Other comprehensive income (loss), before tax and reclassification adjustments	(184,459)	(20,268)	65,510
Income tax effect	38,736	4,260	(13,757)
Other comprehensive income (loss), after tax, before reclassification adjustments	(145,723)	(16,008)	51,753
Reclassification adjustment for net (gains) losses included in income	1,323	(2,256)	(1,750)
Reclassification adjustment for employee benefit costs included in expense	3,601	6,603	4,289
Total reclassification adjustments, before tax	4,924	4,347	2,539
Income tax effect	(1,034)	(913)	(534)
Total reclassification adjustments, after tax	3,890	3,434	2,005
Comprehensive income (loss)	$ (126,802)	$ 68,020	$ (58,948)
Earnings (loss) per common share:
Basic (in dollars per share)	$ 0.60	$ 3.21	$ (4.50)
Diluted (in dollars per share)	$ 0.59	$ 3.16	$ (4.50)