Consolidated Statements of Income and Comprehensive Income (Unaudited) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Revenues
Net premiums earned	$ 193,341	$ 176,817
Investment income, net of investment expenses	26,762	26,464
Net realized investment gains (includes reclassifications for net unrealized investment gains on available-for-sale securities of $1,482 in 2014; and $1,236 in 2013; previously included in accumulated other comprehensive income)	2,194	1,909
Other income	607	115
Total revenues	222,904	205,305
Benefits, Losses and Expenses
Losses and loss settlement expenses	125,237	97,470
Increase in liability for future policy benefits	7,821	8,236
Amortization of deferred policy acquisition costs	39,534	38,081
Other underwriting expenses (includes reclassifications for employee benefit costs of $768 in 2014; and $1,242 in 2013; previously included in accumulated other comprehensive income)	26,428	22,348
Interest on policyholders’ accounts	7,987	9,320
Total benefits, losses and expenses	207,007	175,455
Income before income taxes	15,897	29,850
Federal income tax expense (includes reclassifications of ($250) in 2014; and $2 in 2013; previously included in accumulated other comprehensive income)	2,566	7,457
Net income	13,331	22,393
Other comprehensive income
Change in net unrealized appreciation on investments	24,069	14,488
Change in liability for underfunded employee benefit plans	0	0
Other comprehensive income, before tax and reclassification adjustments	24,069	14,488
Income tax effect	(8,425)	(5,070)
Other comprehensive income, after tax, before reclassification adjustments	15,644	9,418
Reclassification adjustment for net realized investment gains included in income	(1,482)	(1,236)
Reclassification adjustment for employee benefit costs included in expense	768	1,242
Total reclassification adjustments, before tax	(714)	6
Income tax effect	250	(2)
Total reclassification adjustments, after tax	(464)	4
Comprehensive income	$ 28,511	$ 31,815
Weighted average common shares outstanding (in shares)	25,372,280	25,245,497
Basic earnings per common share (in dollars per share)	$ 0.53	$ 0.89
Diluted earnings per common share (in dollars per share)	$ 0.52	$ 0.88