Consolidated Balance Sheets - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Investments:
Fixed maturities available-for-sale, at fair value (cost: 2021 - $4,203.2, 2020 - $3,981.1; allowance for expected credit losses: 2021 - $2.5, 2020 - $6.6)	$ 4,223.3	$ 4,107.1
Equity securities, at fair value (cost: 2021 - $70.3; 2020 - $162.5)	56.3	176.7
Other investments (cost: 2021 - $387.0; 2020 - $429.4)	387.2	429.4
Short-term investments, at fair value (cost: 2021 - $655.4; 2020 - $541.4)	655.8	542.6
Investments	5,322.6	5,255.8
Cash	146.1	148.8
Accrued investment income	20.9	21.8
Premiums receivable	648.6	679.8
Reinsurance recoverables	2,966.4	3,009.0
Goodwill	147.3	147.3
Intangible assets, net of accumulated amortization	17.3	60.5
Current income taxes receivable, net	7.3	3.0
Deferred tax assets, net	73.6	16.7
Deferred acquisition costs, net	168.0	163.6
Ceded unearned premiums	506.7	575.1
Operating leases right-of-use assets	81.4	82.0
Other assets	211.6	294.7
Assets held for sale	0.0	7.7
Total assets	10,317.8	10,465.8
Liabilities and Shareholders' Equity
Reserves for losses and loss adjustment expenses	5,595.0	5,406.0
Unearned premiums	1,466.8	1,464.8
Accrued underwriting expenses and other liabilities	166.6	167.6
Ceded reinsurance payable, net	724.4	950.4
Funds held	76.6	64.7
Senior unsecured fixed rate notes	140.3	140.2
Other indebtedness	57.0	60.7
Junior subordinated debentures	258.2	257.8
Operating lease liabilities	97.7	95.8
Total liabilities	8,582.6	8,608.0
Commitments and contingencies (Note 18)
Shareholders' equity:
Preferred shares and additional paid-in capital - $1.00 par, 30,000,000 shares authorized; 6,000 and 6,000 shares issued at December 31, 2021 and December 31, 2020, respectively; liquidation preference $25,000	144.0	144.0
Common shares - $1.00 par, 500,000,000 shares authorized; 46,192,867 and 46,009,966 shares issued at December 31, 2021 and December 31, 2020, respectively	46.2	46.0
Additional paid-in capital	1,386.4	1,380.2
Treasury shares (11,315,889 shares at December 31, 2021 and December 31, 2020, respectively)	(455.1)	(455.1)
Retained earnings	636.4	684.1
Accumulated other comprehensive income, net of taxes	(22.7)	58.6
Total shareholders' equity	1,735.2	1,857.8
Total liabilities and shareholders' equity	$ 10,317.8	$ 10,465.8