Consolidated Statements of Income and Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Revenues
Net premiums earned	$ 1,055,082	$ 1,086,972	$ 1,037,451
Investment income, net of investment expenses	39,670	60,414	52,894
Net realized investment gains (losses) (includes reclassifications for net unrealized gains on available-for-sale securities of $1,750 in 2020; $(1,521) in 2019; and $(784) in 2018 previously included in accumulated other comprehensive income)	(32,395)	53,779	(20,179)
Other income	6,270	0	0
Total revenues	1,068,627	1,201,165	1,070,166
Benefits, losses and expenses
Losses and loss settlement expenses	869,467	830,172	731,611
Amortization of deferred policy acquisition costs	210,252	216,699	206,232
Other underwriting expenses (includes reclassifications for employee benefit costs of $(4,289) in 2020; $(4,497) in 2019; and $(6,642) in 2018 previously included in accumulated other comprehensive income)	143,332	137,415	141,473
Goodwill impairment	15,091	0	0
Total benefits, losses and expenses	1,238,142	1,184,286	1,079,316
Income (loss) from continuing operations before income taxes	(169,515)	16,879	(9,150)
Federal income tax expense (benefit) (includes reclassifications of $534 in 2020; $1,263 in 2019; and $1,559 in 2018 previously included in accumulated other comprehensive income)	(56,809)	2,059	(11,405)
Net income (loss) from continuing operations	(112,706)	14,820	2,255
Income (loss) from discontinued operations, net of taxes	0	0	(1,912)
Gain on sale of discontinued operations, net of taxes	0	0	27,307
Net income (loss)	(112,706)	14,820	27,650
Other comprehensive income (loss)
Change in net unrealized appreciation on investments	47,054	70,127	(50,985)
Change in liability for underfunded employee benefit plans	18,456	(20,924)	25,513
Other comprehensive income (loss), before tax and reclassification adjustments	65,510	49,203	(25,472)
Income tax effect	(13,757)	(10,334)	5,349
Other comprehensive income (loss), after tax, before reclassification adjustments	51,753	38,869	(20,123)
Reclassification adjustment for net realized (gains) losses included in income	(1,750)	1,521	784
Reclassification adjustment for employee benefit costs included in expense	(4,289)	(4,497)	(6,642)
Total reclassification adjustments, before tax	2,539	6,018	7,426
Income tax effect	534	1,263	1,559
Total reclassification adjustments, after tax	2,005	4,755	5,867
Comprehensive income (loss)	$ (58,948)	$ 58,444	$ 13,394
Weighted average common shares outstanding (in shares)	25,027,358	25,138,039	25,006,211
Earnings (loss) per common share from continuing operations:
Basic (in dollars per share)	$ (4.50)	$ 0.59	$ 0.09
Diluted (in dollars per share)	(4.50)	0.58	0.09
Earnings (loss) per common share:
Basic (in dollars per share)	(4.50)	0.59	1.11
Diluted (in dollars per share)	$ (4.50)	$ 0.58	$ 1.08