CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Investments:
Fixed maturities available for sale, at fair value (amortized cost: $9,165,438 and $8,771,988)	$ 9,375,604	$ 8,957,859
Short-term investments available for sale, at fair value (amortized cost: $909,121 and $913,488)	904,219	915,841
Investment of funds received under securities lending, at fair value (amortized cost: $48,577 and $69,682)	48,419	69,660
Equity securities available for sale, at fair value (cost: $299,058 and $292,958)	299,584	310,194
Other investments available for sale, at fair value (cost: $235,381 and $252,590)	238,111	275,538
Investments accounted for using the fair value option	366,903	219,173
TALF investments, at fair value (amortized cost: $373,040 and $389,200)	387,702	402,449
Investments accounted for using the equity method	380,507	508,334
Total investments	12,001,049	11,659,048
Cash	351,699	362,740
Accrued investment income	70,739	74,837
Investment in joint venture (cost: $100,000)	107,576	105,698
Fixed maturities and short-term investments pledged under securities lending, at fair value	56,393	75,575
Premiums receivable	501,563	503,434
Reinsurance recoverable on unpaid and paid losses and loss adjustment expenses	1,851,584	1,763,985
Contractholder receivables	748,231	660,546
Prepaid reinsurance premiums	265,696	263,448
Deferred acquisition costs, net	279,109	277,861
Receivable for securities sold	462,891	56,145
Other assets	445,239	475,911
Total Assets	17,141,769	16,279,228
Liabilities
Reserve for losses and loss adjustment expenses	8,456,210	8,098,454
Unearned premiums	1,411,872	1,370,075
Reinsurance balances payable	133,866	132,452
Contractholder payables	748,231	660,546
Senior notes	300,000	300,000
Revolving credit agreement borrowings	100,000	100,000
TALF borrowings, at fair value (par: $310,868 and $326,219)	310,486	325,770
Securities lending payable	58,546	78,021
Payable for securities purchased	480,230	200,192
Other liabilities	513,842	500,715
Total Liabilities	12,513,283	11,766,225
Commitments and Contingencies	0	0
Shareholders' Equity
Non-cumulative preferred shares - Series A and B	325,000	325,000
Common shares ($0.0033 par, shares issued: 164,636,338 and 160,073,616)	549	534
Additional paid-in capital	161,419	110,325
Retained earnings	4,833,067	4,422,553
Accumulated other comprehensive income, net of deferred income tax	153,923	204,503
Common shares held in treasury, at cost (shares: 30,277,993 and 20,441,391)	(845,472)	(549,912)
Total Shareholders Equity	4,628,486	4,513,003
Total Liabilities and Shareholders Equity	$ 17,141,769	$ 16,279,228