Condensed Consolidated Statements of Earnings and Comprehensive Earnings - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Condensed Consolidated Statements of Earnings and Comprehensive Earnings
Net premiums earned	$ 208,734	$ 207,541	$ 424,316	$ 412,230
Net investment income	16,917	16,998	34,695	33,563
Net realized gains (losses)	(2,109)	4,764	13,043	13,832
Net unrealized gains (losses) on equity securities	74,705	8,810	(55,690)	42,308
Consolidated revenue	298,247	238,113	416,364	501,933
Losses and settlement expenses	101,202	103,919	212,223	198,216
Policy acquisition costs	69,463	71,742	142,404	143,034
Insurance operating expenses	13,906	16,948	28,287	33,615
Interest expense on debt	1,903	1,861	3,800	3,722
General corporate expenses	1,994	3,283	3,749	6,559
Total expenses	188,468	197,753	390,463	385,146
Equity in earnings of unconsolidated investees	5,100	8,468	9,614	13,782
Earnings before income taxes	114,879	48,828	35,515	130,569
Income tax expense:
Income tax expense	22,713	8,361	4,616	24,629
Net earnings	92,166	40,467	30,899	105,940
Other comprehensive earnings, net of tax	53,571	27,864	40,540	57,165
Comprehensive earnings	$ 145,737	$ 68,331	$ 71,439	$ 163,105
Basic:
Net earnings per share (in dollars per share)	$ 2.05	$ 0.91	$ 0.69	$ 2.37
Comprehensive earnings per share (in dollars per share)	3.24	1.53	1.59	3.66
Diluted:
Net earnings per share (in dollars per share)	2.04	0.89	0.68	2.35
Comprehensive earnings per share (in dollars per share)	$ 3.22	$ 1.51	$ 1.58	$ 3.62
Weighted average number of common shares outstanding
Basic (in shares)	44,951	44,704	44,936	44,620
Diluted (in shares)	45,274	45,219	45,311	45,056