Consolidated Statements of Income and Comprehensive Income (Unaudited) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Revenues
Net premiums earned	$ 213,171	$ 193,341
Investment income, net of investment expenses	24,363	26,762
Net realized investment gains (includes reclassifications for net unrealized investment gains on available-for-sale securities of $1,895 in 2015 and $1,482 in 2014; previously included in accumulated other comprehensive income (loss))	887	2,194
Other income	63	607
Total revenues	238,484	222,904
Benefits, Losses and Expenses
Losses and loss settlement expenses	126,409	125,237
Increase in liability for future policy benefits	7,623	7,821
Amortization of deferred policy acquisition costs	42,472	39,534
Other underwriting expenses (includes reclassifications for employee benefit costs of $1,867 in 2015 and $768 in 2014; previously included in accumulated other comprehensive income (loss))	23,534	26,428
Interest on policyholders’ accounts	6,615	7,987
Total benefits, losses and expenses	206,653	207,007
Income before income taxes	31,831	15,897
Federal income tax expense (includes reclassifications of ($10) in 2015 and ($250) in 2014; previously included in accumulated other comprehensive income (loss))	8,152	2,566
Net income	23,679	13,331
Other comprehensive income (loss)
Change in net unrealized appreciation on investments	13,114	24,069
Change in liability for underfunded employee benefit plans	0	0
Other comprehensive income, before tax and reclassification adjustments	13,114	24,069
Income tax effect	(4,590)	(8,425)
Other comprehensive income, after tax, before reclassification adjustments	8,524	15,644
Reclassification adjustment for net realized investment gains included in income	(1,895)	(1,482)
Reclassification adjustment for employee benefit costs included in expense	1,867	768
Total reclassification adjustments, before tax	(28)	(714)
Income tax effect	10	250
Total reclassification adjustments, after tax	(18)	(464)
Comprehensive income	$ 32,185	$ 28,511
Weighted average common shares outstanding (in shares)	24,990,470	25,372,280
Basic earnings per common share (in dollars per share)	$ 0.95	$ 0.53
Diluted earnings per common share (in dollars per share)	$ 0.94	$ 0.52