Consolidated Statements of Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Revenues
Net premiums earned	$ 275,993	$ 304,427	$ 332,888
Net investment income	25,435	29,364	32,483
Net realized gains (losses) on investments	1,695	1,132	(80)
Net unrealized gains on equity securities	12,315	4,204	4,758
Fee and other income	496	350	321
Total revenues	315,934	339,477	370,370
Expenses
Loss and loss adjustment expenses incurred	160,798	157,226	176,342
Underwriting and certain other operating costs	24,813	20,834	22,221
Commissions	21,284	23,147	25,010
Salaries and benefits	25,954	27,925	27,120
Policyholder dividends	3,715	3,453	4,160
Provision for investment related credit loss benefit	(79)	(27)
Total expenses	236,485	232,558	254,853
Income before income taxes	79,449	106,919	115,517
Income tax expense	13,693	20,317	22,827
Net income	$ 65,756	$ 86,602	$ 92,690
Earnings per share
Basic	$ 3.40	$ 4.49	$ 4.82
Diluted	$ 3.39	$ 4.47	$ 4.80
Shares used in computing earnings per share
Basic	19,332,391	19,288,996	19,248,657
Diluted	19,408,619	19,363,809	19,329,238
Extraordinary cash dividends declared per common share	$ 4.00	$ 3.50	$ 3.50
Cash dividends declared per common share	$ 1.16	$ 1.08	$ 1.00