CONSOLIDATED STATEMENTS OF INCOME (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Revenues
Premiums	$ 1,094.3	$ 1,035.6
Net investment income	67.3	68.8
Net realized investment gains (losses):
Net realized gains from sales and other	8.6	5.0
Net other - than - temporary impairment losses on investments recognized in earnings	(0.5)	(1.9)
Total net realized investment gains	8.1	3.1
Fees and other income	10.6	14.3
Total revenues	1,180.3	1,121.8
Losses and expenses
Losses and loss adjustment expenses	683.4	661.4
Amortization of deferred acquisition costs	242.5	228.1
Interest expense	14.7	16.2
Other operating expenses	150.8	145.3
Total losses and expenses	1,091.4	1,051.0
Income before income taxes	88.9	70.8
Income tax expense (benefit):
Current	4.0	39.0
Deferred	18.5	(18.9)
Total income tax expense (benefit)	22.5	20.1
Income from continuing operations	66.4	50.7
Net loss from discontinued operations (net of income tax benefit of $0.1 for the three months ended March 31, 2013 and 2012)	(0.2)	(1.0)
Net income	$ 66.2	$ 49.7
Basic:
Income from continuing operations	$ 1.49	$ 1.13
Net loss from discontinued operations		$ (0.02)
Net income per share	$ 1.49	$ 1.11
Weighted average shares outstanding	44.6	44.9
Diluted:
Income from continuing operations	$ 1.47	$ 1.11
Net loss from discontinued operations	$ (0.01)	$ (0.02)
Net income per share	$ 1.46	$ 1.09
Weighted average shares outstanding	45.3	45.5