UNAUDITED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013		Mar. 31, 2012
Cash flows provided by (used in) operating activities:
Net income (loss)	$ 386,532		$ 213,185
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Net realized (gains) losses on investments	(36,510)		(20,803)
Net realized and unrealized (gains) losses on derivative instruments	(7,885)		(702)
Amortization of premiums (discounts) on fixed maturities	37,783		36,678
(Income) loss from investment and operating affiliates	(63,219)	[1]	(35,661)
Share-based compensation	15,086		11,172
Depreciation	13,109		13,859
Accretion of deposit liabilities	12,564		16,446
Changes in:
Unpaid losses and loss expenses	(117,861)		(444,959)
Future policy benefit reserves	(48,114)		(37,565)
Unearned premiums	636,875		655,416
Premiums receivable	(629,528)		(573,122)
Unpaid losses and loss expenses recoverable	2,973		245,960
Ceded unearned premiums	(65,191)		(47,201)
Reinsurance balances receivable	(41,234)		(38,319)
Deferred acquisition costs	(70,547)		(81,792)
Reinsurance balances payable	129,253		243,696
Deferred tax asset - net	(17,565)		9,243
Derivatives	52,675		(17,908)
Other assets	(24,197)		42,434
Other liabilities	(23,052)		(45,522)
Other	3,697		8,835
Total adjustments	(240,888)		(59,815)
Net cash provided by (used in) operating activities	145,644		153,370
Cash flows provided by (used in) investing activities:
Proceeds from sale of fixed maturities and short-term investments	1,198,391		1,499,832
Proceeds from redemption of fixed maturities and short-term investments	1,174,101		1,246,431
Proceeds from sale of equity securities	37,446		7,635
Purchases of fixed maturities and short term investments	(2,262,022)		(3,385,981)
Purchases of equity securities	(209,793)		(119,052)
Net dispositions of investment affiliates	(62,387)		34,358
Other investments, net	121,771		(45,333)
Net cash provided by (used in) investing activities	(2,493)		(762,110)
Cash flows provided by (used in) financing activities:
Proceeds from issuance of ordinary shares and exercise of stock options	3,248		942
Buybacks of ordinary shares	(224,420)		(100,490)
Dividends paid on ordinary shares	(805)		(1,218)
Distributions to non-controlling interests	(3,257)		(3,985)
Repayment of debt	0		(600,000)
Deposit liabilities	(38,704)		(30,437)
Net cash provided by (used in) financing activities	(263,938)		(735,188)
Effects of exchange rate changes on foreign currency cash	(24,304)		25,121
Increase (decrease) in cash and cash equivalents	(145,091)		(1,318,807)
Cash and cash equivalents beginning of year	2,618,378		3,825,125
Cash and cash equivalents end of year	$ 2,473,287		$ 2,506,318

[1] The Company records the income related to the alternative funds and to the private investment and operating fund affiliates on a one-month and three-month lag, respectively.