Condensed Consolidated Statements of Earnings and Comprehensive Earnings - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Condensed Consolidated Statements of Earnings and Comprehensive Earnings
Net premiums earned	$ 204,689	$ 190,027
Net investment income	16,565	14,232
Net realized gains	9,068	8,460
Other-than-temporary-impairment (OTTI) losses on investments		(56)
Net unrealized gains (losses) on equity securities	33,498	(26,772)
Consolidated revenue	263,820	185,891
Losses and settlement expenses	94,297	92,421
Policy acquisition costs	71,292	66,734
Insurance operating expenses	16,667	13,385
Interest expense on debt	1,861	1,856
General corporate expenses	3,276	2,283
Total expenses	187,393	176,679
Equity in earnings of unconsolidated investees	5,314	5,166
Earnings before income taxes	81,741	14,378
Income tax expense:
Income tax expense	16,268	2,162
Net earnings	65,473	12,216
Other comprehensive earnings (loss), net of tax	29,301	(26,398)
Comprehensive earnings (loss)	$ 94,774	$ (14,182)
Basic:
Net earnings per share (in dollars per share)	$ 1.47	$ 0.28
Comprehensive earnings (loss) per share (in dollars per share)	2.13	(0.32)
Diluted:
Net earnings per share (in dollars per share)	1.46	0.27
Comprehensive earnings (loss) per share (in dollars per share)	$ 2.11	$ (0.32)
Weighted average number of common shares outstanding
Basic (in shares)	44,536	44,221
Diluted (in shares)	44,887	44,650
Cash dividends paid per common share	$ 0.22	$ 0.21