Unaudited Condensed Consolidated Statements Of Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Revenues:
Premiums	$ 538.5	$ 507.3	$ 1,613.2	$ 1,536.6
Administrative fees	32.5	32.8	98.3	97.0
Net investment income	153.7	152.6	466.3	461.3
Net capital gains (losses):
Total other-than-temporary impairment losses on fixed maturity securities-available-for-sale	(2.9)	(0.3)	(4.5)	(0.4)
All other net capital gains (losses)	(3.3)	(4.4)	(10.8)	(4.9)
Total net capital gains (losses)	(6.2)	(4.7)	(15.3)	(5.3)
Total revenues	718.5	688.0	2,162.5	2,089.6
Benefits and expenses:
Benefits to policyholders	404.3	360.8	1,207.7	1,188.1
Interest credited	35.4	38.7	117.4	122.8
Operating expenses	127.0	119.9	377.1	348.3
Commissions and bonuses	56.9	53.2	171.0	154.7
Premium taxes	9.8	7.5	28.5	24.7
Interest expense	7.8	7.8	23.3	24.1
Net decrease (increase) in DAC, VOBA, and other intangibles	(3.7)	(2.8)	(10.3)	(2.0)
Total benefits and expenses	637.5	585.1	1,914.7	1,860.7
Income before income taxes	81.0	102.9	247.8	228.9
Income taxes	25.8	33.1	71.8	70.2
Net income	$ 55.2	$ 69.8	$ 176.0	$ 158.7
Net income per common share:
Basic	$ 1.3	$ 1.63	$ 4.17	$ 3.66
Diluted	$ 1.28	$ 1.62	$ 4.11	$ 3.63
Weighted-average common shares outstanding:
Basic	42,322,478	42,777,337	42,234,656	43,324,269
Diluted weighted-average common shares outstanding	43,050,050	43,184,170	42,867,985	43,736,832