Condensed Consolidated Statements of Earnings and Comprehensive Earnings - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Condensed Consolidated Statements of Earnings and Comprehensive Earnings
Net premiums earned	$ 183,595	$ 179,448	$ 540,739	$ 520,790
Net investment income	13,504	13,964	39,922	40,890
Net realized gains	9,347	7,534	23,457	25,622
Other-than-temporary impairment (OTTI) losses on investments	(95)		(95)
Consolidated revenue	206,351	200,946	604,023	587,302
Losses and settlement expenses	97,892	73,051	259,340	218,461
Policy acquisition costs	61,761	60,505	184,525	178,965
Insurance operating expenses	13,338	12,299	38,950	37,297
Interest expense on debt	1,857	1,857	5,570	5,570
General corporate expenses	2,242	1,958	7,385	6,950
Total expenses	177,090	149,670	495,770	447,243
Equity in earnings of unconsolidated investees	1,881	661	10,823	11,041
Earnings before income taxes	31,142	51,937	119,076	151,100
Income tax expense	8,879	16,029	36,343	47,409
Net earnings	22,263	35,908	82,733	103,691
Other comprehensive earnings (loss), net of tax	(6,931)	(16,136)	33,898	(48,663)
Comprehensive earnings	$ 15,332	$ 19,772	$ 116,631	$ 55,028
Basic:
Net earnings per share (in dollars per share)	$ 0.51	$ 0.83	$ 1.89	$ 2.40
Comprehensive earnings per share (in dollars per share)	0.35	0.46	2.67	1.27
Diluted:
Net earnings per share (in dollars per share)	0.50	0.81	1.86	2.35
Comprehensive earnings per share (in dollars per share)	$ 0.34	$ 0.45	$ 2.63	$ 1.25
Weighted average number of common shares outstanding
Basic (in shares)	43,843	43,342	43,721	43,232
Diluted (in shares)	44,492	44,153	44,416	44,031
Cash dividends paid per common share (in dollars per share)	$ 0.20	$ 0.19	$ 0.59	$ 0.56