Condensed Consolidated Balance Sheets - USD ($) $ in Millions	Jun. 30, 2017	Dec. 31, 2016	[1]
Assets
Fixed maturities available-for-sale, at fair value (cost: 2017 - $3,248.6; 2016 - $2,938.8)	$ 3,276.2	$ 2,932.4
Equity securities available-for-sale, at fair value (cost: 2017 - $321.5; 2016 - $335.2)	442.6	447.4
Other investments (cost: 2017 - $530.0; 2016 - $531.6)	539.4	539.0
Short-term investments, at fair value (cost: 2017 - $365.9; 2016 - $405.5)	365.9	405.5
Total investments	4,624.1	4,324.3
Cash	214.5	86.0
Accrued investment income	23.0	20.7
Premiums receivable	672.6	463.8
Reinsurance recoverables	1,519.6	1,385.6
Goodwill	152.2	152.2
Intangible assets, net of accumulated amortization	108.9	67.7
Deferred acquisition costs, net	162.8	139.1
Ceded unearned premiums	436.6	302.8
Other assets	326.4	262.8
Total assets	8,240.7	7,205.0
Liabilities and Shareholders' Equity
Reserves for losses and loss adjustment expenses	3,632.8	3,350.8
Unearned premiums	1,176.2	970.0
Accrued underwriting expenses	116.0	115.0
Ceded reinsurance payable, net	704.7	466.6
Funds held	40.2	77.1
Senior unsecured fixed rate notes	139.5	139.5
Other indebtedness	182.5	55.4
Junior subordinated debentures	256.4	172.7
Current income taxes payable, net	13.4	8.1
Deferred tax liabilities, net	38.2	24.1
Other liabilities	49.5	33.0
Total liabilities	6,349.4	5,412.3
Commitments and contingencies (Note 16)	0.0	0.0
Shareholders' equity:
Common shares - $1.00 par, 500,000,000 shares authorized; 40,262,441 and 40,042,330 shares issued at June 30, 2017 and December 31, 2016, respectively	40.3	40.0
Additional paid-in capital	1,125.9	1,123.3
Treasury shares (10,075,255 and 10,028,755 shares at June 30, 2017 and December 31, 2016, respectively)	(381.0)	(378.2)
Retained earnings	1,026.0	959.9
Accumulated other comprehensive income, net of taxes	80.1	47.7
Total shareholders' equity	1,891.3	1,792.7
Total liabilities and shareholders' equity	$ 8,240.7	$ 7,205.0

[1] Derived from audited consolidated financial statements.