Unaudited Condensed Consolidated Balance Sheets (USD $) In Thousands	Sep. 30, 2011	Dec. 31, 2010
Assets
Fixed maturities, trading securities, at fair value (amortized cost: 2011, $13,754,316; 2010, $12,394,797)	$ 14,356,056	$ 12,824,389
Short-term investments, trading securities, at fair value (amortized cost: 2011, $97,628; 2010, $49,132)	97,661	49,397
Equities, trading securities, at fair value (cost: 2011, $1,031,364; 2010, $942,745)	1,001,148	1,071,676
Other invested assets	334,991	352,405
Total investments	15,789,856	14,297,867
Funds held - directly managed (cost: 2011, $1,294,459; 2010, $1,751,276)	1,322,761	1,772,118
Cash and cash equivalents, at fair value, which approximates amortized cost	1,073,432	2,111,084
Accrued investment income	198,503	201,928
Reinsurance balances receivable	2,313,538	2,076,884
Reinsurance recoverable on paid and unpaid losses	447,015	382,878
Funds held by reinsured companies	814,950	937,032
Deferred acquisition costs	602,275	595,557
Deposit assets	235,470	256,702
Net tax assets	38,532	14,960
Goodwill	455,533	455,533
Intangible assets	142,760	178,715
Other assets	184,488	83,113
Total assets	23,619,113	23,364,371
Liabilities
Unpaid losses and loss expenses	11,352,599	10,666,604
Policy benefits for life and annuity contracts	1,678,201	1,750,410
Unearned premiums	1,787,351	1,599,139
Other reinsurance balances payable	493,926	491,194
Deposit liabilities	244,775	268,239
Net tax liabilities	339,031	316,325
Accounts payable, accrued expenses and other	194,558	244,552
Debt related to senior notes	750,000	750,000
Debt related to capital efficient notes	70,989	70,989
Total liabilities	16,911,430	16,157,452
Shareholders' Equity
Common shares (par value $1.00; issued: 2011, 84,580,948 shares; 2010, 84,033,089 shares)	84,581	84,033
Preferred shares (par value $1.00; issued and outstanding: 2011, 35,750,000 shares; 2010, 20,800,000 shares; aggregate liquidation value: 2011, $893,750; 2010, $520,000)	35,750	20,800
Additional paid-in capital	3,796,410	3,419,864
Accumulated other comprehensive (loss) income:
Currency translation adjustment	5,227	16,101
Other accumulated comprehensive loss (net of tax of: 2011, $5,483; 2010, $4,872)	(13,094)	(12,045)
Retained earnings	4,108,524	4,761,178
Common shares held in treasury, at cost (2011, 16,831,534 shares; 2010, 14,046,895 shares)	(1,309,715)	(1,083,012)
Total shareholders' equity	6,707,683	7,206,919
Total liabilities and shareholders' equity	$ 23,619,113	$ 23,364,371