Unaudited Condensed Consolidated Statements Of Operations And Comprehensive Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
REVENUES:
Gross premiums written	$ 800.3	$ 826.0	$ 1,663.8	$ 1,706.6
Premiums ceded	(222.2)	(222.3)	(381.7)	(330.4)
Net premiums written	578.1	603.7	1,282.1	1,376.2
Change in unearned premiums	24.8	42.7	(99.1)	(161.3)
Net premiums earned	602.9	646.4	1,183.0	1,214.9
Net investment income	55.8	42.8	109.1	87.3
Net realized investment gains (losses)	74.5	(20.2)	93.4	24.8
Other income	5.2	0.9	5.7	1.9
Total revenues	738.4	669.9	1,391.2	1,328.9
EXPENSES:
Net losses and loss expenses	365.4	431.5	737.8	756.7
Acquisition costs	87.4	100.6	175.7	179.3
General and administrative expenses	104.7	108.4	201.1	205.5
Other expenses	1.7	1.2	2.8	3.1
Amortization of intangible assets	2.5	2.8	5.0	3.4
Interest expense	19.9	14.5	39.8	28.8
Foreign exchange (gain) loss	(2.9)	1.3	(5.9)	11.2
Total expenses	578.7	660.3	1,156.3	1,188.0
Income before income taxes	159.7	9.6	234.9	140.9
Income tax expense	6.3	0.1	7.4	7.1
NET INCOME	153.4	9.5	227.5	133.8
Other comprehensive gain (loss): foreign currency translation adjustment	0.1	(3.3)	3.3	(3.3)
COMPREHENSIVE INCOME	$ 153.5	$ 6.2	$ 230.8	$ 130.5
PER SHARE DATA
Basic earnings per share	$ 1.73	$ 0.10	$ 2.54	$ 1.42
Diluted earnings per share	$ 1.70	$ 0.10	$ 2.50	$ 1.40
Weighted average common shares outstanding	88,742,484	92,441,730	89,495,564	94,178,989
Weighted average common shares and common share equivalents outstanding	90,040,509	93,984,226	90,830,814	95,830,455
Dividends paid per share	$ 0.26	$ 0.225	$ 0.52	$ 0.45