Condensed Consolidated Statements of Earnings and Comprehensive Earnings - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Condensed Consolidated Statements of Earnings and Comprehensive Earnings
Net premiums earned	$ 179,448	$ 177,747	$ 520,790	$ 507,483
Net investment income	13,964	14,200	40,890	41,764
Net realized investment gains	7,534	5,708	25,622	22,640
Consolidated revenue	200,946	197,655	587,302	571,887
Losses and settlement expenses	73,051	76,019	218,461	220,380
Policy acquisition costs	60,505	58,180	178,965	168,387
Insurance operating expenses	12,299	13,120	37,297	39,187
Interest expense on debt	1,857	1,857	5,570	5,582
General corporate expenses	1,958	2,800	6,950	7,547
Total expenses	149,670	151,976	447,243	441,083
Equity in earnings of unconsolidated investees	661	2,915	11,041	12,204
Earnings before income taxes	51,937	48,594	151,100	143,008
Income tax expense	16,029	15,340	47,409	45,060
Net earnings	35,908	33,254	103,691	97,948
Other comprehensive earnings (loss), net of tax	(16,136)	(12,353)	(48,663)	25,318
Comprehensive earnings	$ 19,772	$ 20,901	$ 55,028	$ 123,266
Basic:
Net earnings per share (in dollars per share)	$ 0.83	$ 0.77	$ 2.40	$ 2.28
Comprehensive earnings per share (in dollars per share)	0.46	0.49	1.27	2.87
Diluted:
Net earnings per share (in dollars per share)	0.81	0.76	2.35	2.24
Comprehensive earnings per share (in dollars per share)	$ 0.45	$ 0.48	$ 1.25	$ 2.82
Weighted average number of common shares outstanding
Basic (in shares)	43,342	43,026	43,232	43,004
Diluted (in shares)	44,153	43,712	44,031	43,692
Cash dividends paid per common share (in dollars per share)	$ 0.19	$ 0.18	$ 0.56	$ 0.53