Consolidated Statements of Income and Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Revenues
Net premiums earned	$ 253,487	$ 229,225	$ 494,785	$ 442,396
Investment income, net of investment expenses	24,507	25,792	46,731	50,155
Net realized investment gains (includes reclassifications for net unrealized investment gains on available-for-sale securities of $700 and $2,346 in 2016 and $995 and $2,890 in 2015; previously included in accumulated other comprehensive income)	1,596	769	3,651	1,656
Other income	183	132	291	195
Total revenues	279,773	255,918	545,458	494,402
Benefits, Losses and Expenses
Losses and loss settlement expenses	180,412	150,362	322,540	276,771
Increase in liability for future policy benefits	16,002	12,096	28,554	19,719
Amortization of deferred policy acquisition costs	52,585	44,357	102,816	86,829
Other underwriting expenses (includes reclassifications for employee benefit costs of $1,371 and $2,742 in 2016 and $1,867 and $3,734 in 2015; previously included in accumulated other comprehensive income)	24,772	23,546	51,525	47,080
Interest on policyholders’ accounts	5,138	6,024	10,385	12,639
Total benefits, losses and expenses	278,909	236,385	515,820	443,038
Income before income taxes	864	19,533	29,638	51,364
Federal income tax expense (benefit) (includes reclassifications of ($234) and ($138) in 2016 and ($305) and ($295) in 2015; previously included in accumulated other comprehensive income)	(2,250)	4,515	4,097	12,667
Net income	3,114	15,018	25,541	38,697
Other comprehensive income (loss)
Change in net unrealized appreciation on investments	49,332	(36,237)	93,208	(23,123)
Change in liability for underfunded employee benefit plans	0	0	0	0
Other comprehensive income (loss), before tax and reclassification adjustments	49,332	(36,237)	93,208	(23,123)
Income tax effect	(17,267)	12,682	(32,624)	8,092
Other comprehensive income (loss), after tax, before reclassification adjustments	32,065	(23,555)	60,584	(15,031)
Reclassification adjustment for net realized investment gains included in income	(700)	(995)	(2,346)	(2,890)
Reclassification adjustment for employee benefit costs included in expense	1,371	1,867	2,742	3,734
Total reclassification adjustments, before tax	671	872	396	844
Income tax effect	(234)	(305)	(138)	(295)
Total reclassification adjustments, after tax	437	567	258	549
Comprehensive income (loss)	$ 35,616	$ (7,970)	$ 86,383	$ 24,215
Weighted average common shares outstanding (in shares)	25,366,283	25,023,753	25,288,086	25,007,204
Basic earnings per common share (in dollars per share)	$ 0.12	$ 0.60	$ 1.01	$ 1.55
Diluted earnings per common share (in dollars per share)	$ 0.12	$ 0.59	$ 1.00	$ 1.54