Consolidated Statements of Income and Comprehensive Income (Unaudited) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Revenues
Net premiums earned	$ 212,021	$ 194,219	$ 607,189	$ 557,403
Investment income, net of investment expenses	22,837	27,278	77,202	82,761
Net realized investment gains (losses)
Other-than-temporary impairment charges	0	(139)	0	(139)
Net realized investment gains (includes reclassifications for net unrealized investment gains on available-for-sale securities of $985 and $4,073 in 2014; and $617 and $6,270 in 2013; previously included in accumulated other comprehensive income (loss))	894	1,329	5,796	7,389
Total net realized investment gains	894	1,190	5,796	7,250
Other income	113	337	1,255	634
Total revenues	235,865	223,024	691,442	648,048
Benefits, Losses and Expenses
Losses and loss settlement expenses	154,346	131,168	422,299	349,073
Increase in liability for future policy benefits	10,552	8,415	26,450	26,520
Amortization of deferred policy acquisition costs	44,644	38,767	124,374	113,556
Other underwriting expenses (includes reclassifications for employee benefit costs of $768 and $2,304 in 2014; and $1,915 and $4,400 in 2013; previously included in accumulated other comprehensive income (loss))	21,665	21,654	68,869	67,310
Interest on policyholders’ accounts	7,503	8,625	23,342	27,026
Total benefits, losses and expenses	238,710	208,629	665,334	583,485
Income (loss) before income taxes	(2,845)	14,395	26,108	64,563
Federal income tax expense (benefit) (includes reclassifications of ($76) and ($619) in 2014; and $455 and ($654) in 2013; previously included in accumulated other comprehensive income (loss))	(3,170)	2,670	1,767	14,949
Net income	325	11,725	24,341	49,614
Other comprehensive income (loss)
Change in net unrealized appreciation on investments	(12,410)	(282)	38,767	(37,576)
Change in liability for underfunded employee benefit plans	0	0	0	0
Other comprehensive income (loss), before tax and reclassification adjustments	(12,410)	(282)	38,767	(37,576)
Income tax effect	4,344	107	(13,569)	13,152
Other comprehensive income (loss), after tax, before reclassification adjustments	(8,066)	(175)	25,198	(24,424)
Reclassification adjustment for net realized investment gains included in income	(985)	(617)	(4,073)	(6,270)
Reclassification adjustment for employee benefit costs included in expense	768	1,915	2,304	4,400
Total reclassification adjustments, before tax	(217)	1,298	(1,769)	(1,870)
Income tax effect	76	(455)	619	654
Total reclassification adjustments, after tax	(141)	843	(1,150)	(1,216)
Comprehensive income (loss)	$ (7,882)	$ 12,393	$ 48,389	$ 23,974
Weighted average common shares outstanding (in shares)	25,188,381	25,359,196	25,295,842	25,301,432
Basic earnings per common share (in dollars per share)	$ 0.01	$ 0.46	$ 0.96	$ 1.96
Diluted earnings per common share (in dollars per share)	$ 0.01	$ 0.45	$ 0.95	$ 1.94