Consolidated Statements of Income and Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Revenues
Net premiums earned	$ 241,298	$ 213,171
Investment income, net of investment expenses	22,224	24,363
Net realized investment gains (includes reclassifications for net unrealized investment gains on available-for-sale securities of $1,646 in 2016 and $1,895 in 2015; previously included in accumulated other comprehensive income)	2,055	887
Other income	108	63
Total revenues	265,685	238,484
Benefits, Losses and Expenses
Losses and loss settlement expenses	142,128	126,409
Increase in liability for future policy benefits	12,552	7,623
Amortization of deferred policy acquisition costs	50,231	42,472
Other underwriting expenses (includes reclassifications for employee benefit costs of $1,371 in 2016 and $1,867 in 2015; previously included in accumulated other comprehensive income)	26,753	23,534
Interest on policyholders’ accounts	5,247	6,615
Total benefits, losses and expenses	236,911	206,653
Income before income taxes	28,774	31,831
Federal income tax expense (includes reclassifications of ($96) in 2016 and ($10) in 2015; previously included in accumulated other comprehensive income)	6,347	8,152
Net income	22,427	23,679
Other comprehensive income
Change in net unrealized appreciation on investments	43,876	13,114
Change in liability for underfunded employee benefit plans	0	0
Other comprehensive income, before tax and reclassification adjustments	43,876	13,114
Income tax effect	(15,357)	(4,590)
Other comprehensive income, after tax, before reclassification adjustments	28,519	8,524
Reclassification adjustment for net realized investment gains included in income	(1,646)	(1,895)
Reclassification adjustment for employee benefit costs included in expense	1,371	1,867
Total reclassification adjustments, before tax	(275)	(28)
Income tax effect	96	10
Total reclassification adjustments, after tax	(179)	(18)
Comprehensive income	$ 50,767	$ 32,185
Weighted average common shares outstanding (in shares)	25,209,888	24,990,470
Basic earnings per common share (in dollars per share)	$ 0.89	$ 0.95
Diluted earnings per common share (in dollars per share)	$ 0.88	$ 0.94