Condensed Consolidated Statements of Cash Flows (USD $) In Thousands	9 Months Ended
Sep. 30, 2011	Sep. 30, 2010
CASH FLOWS PROVIDED BY OPERATING ACTIVITIES:
Net income	$ 91,448	$ 572,219
Adjustments to reconcile net income to cash provided by operating activities:
Net realized gains on sales of investments	(78,001)	(145,700)
Mark to market adjustments	61,912	(143,650)
Net impairment charges recognized in earnings		168
Stock compensation expense	16,917	25,177
Insurance balances receivable	(77,343)	(71,266)
Prepaid reinsurance	(31,227)	(682)
Reinsurance recoverable	(82,055)	(19,965)
Accrued investment income	777	9,760
Net deferred acquisition costs	(18,267)	(14,479)
Net deferred tax assets	(4,081)	15,401
Other assets	24,650	10,797
Reserve for losses and loss expenses	366,365	128,053
Unearned premiums	196,639	89,195
Reinsurance balances payable	(4,269)	(5,690)
Accounts payable and accrued liabilities	7,564	(27,837)
Other items, net	20,476	(2,310)
Net cash provided by operating activities	491,505	419,191
CASH FLOWS (USED IN) PROVIDED BY INVESTING ACTIVITIES:
Purchases of fixed maturity investments - available for sale	(727)	(138,918)
Purchases of fixed maturity investments - trading	(5,209,039)	(8,739,173)
Purchases of equity securities	(346,210)	(122,929)
Purchases of other invested assets	(265,720)	(138,249)
Sales of fixed maturity investments - available for sale	627,392	2,057,431
Sales of fixed maturity investments - trading	4,772,552	7,583,380
Sales of equity securities	69,028	5,721
Sales of other invested assets	40,129	2,858
Purchases of fixed assets	(7,792)	(7,809)
Change in restricted cash	63,120	(282,595)
Net cash (used in) provided by investing activities	(257,267)	219,717
CASH FLOWS USED IN FINANCING ACTIVITIES:
Dividends paid		(28,774)
Dividends paid - par value reduction	(14,295)
Proceeds from the exercise of stock options	5,317	7,053
Share repurchases	(60,000)	(415,009)
Repurchase of founder warrants	(53,620)	(32,819)
Net cash used in financing activities	(122,598)	(469,549)
Effect of exchange rate changes on foreign currency cash	685	(261)
NET INCREASE IN CASH AND CASH EQUIVALENTS	112,325	169,098
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	756,995	292,188
CASH AND CASH EQUIVALENTS, END OF PERIOD	869,320	461,286
Supplemental disclosure of cash flow information:
- Cash paid for income taxes	6,294	12,820
- Cash paid for interest expense	$ 45,750	$ 37,500

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