UNAUDITED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Cash flows provided by (used in) operating activities:
Net income (loss)	$ 291,476	$ 386,532
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Net realized (gains) losses on investments	(19,229)	(36,509)
Net realized and unrealized (gains) losses on derivative instruments	(1,810)	(7,885)
Amortization of premiums (discounts) on fixed maturities	39,488	37,783
(Income) loss from investment and operating affiliates	(31,999)	(63,219)
Share-based compensation	15,974	15,086
Depreciation	14,961	13,109
Accretion of deposit liabilities	10,477	12,564
Changes in:
Unpaid losses and loss expenses	(72,058)	(117,861)
Future policy benefit reserves	(49,780)	(48,114)
Unearned premiums	621,009	636,875
Premiums receivable	(594,243)	(629,528)
Unpaid losses and loss expenses recoverable	28,747	2,973
Ceded unearned premiums	(110,310)	(65,191)
Reinsurance balances receivable	(60,224)	(41,234)
Deferred acquisition costs	(56,937)	(70,547)
Reinsurance balances payable	269,717	129,253
Deferred tax asset - net	(598)	(17,565)
Derivatives	(12,277)	52,675
Other assets	(25,731)	(24,197)
Other liabilities	(77,037)	(23,052)
Other	20,452	3,696
Total adjustments	(91,408)	(240,888)
Net cash provided by (used in) operating activities	200,068	145,644
Cash flows provided by (used in) investing activities:
Proceeds from sale of fixed maturities and short-term investments	1,106,926	1,198,391
Proceeds from redemption of fixed maturities and short-term investments	1,056,358	1,174,101
Proceeds from sale of equity securities	76,382	37,446
Purchases of fixed maturities and short term investments	(1,411,447)	(2,262,022)
Purchases of equity securities	(80,833)	(209,793)
Proceeds from sale of affiliates	145,174	45,979
Purchases of affiliates	(86,205)	(108,366)
Other, net	(106,075)	121,771
Net cash provided by (used in) investing activities	700,280	(2,493)
Cash flows provided by (used in) financing activities:
Proceeds from issuance of ordinary shares and exercise of stock options	1,310	3,248
Buybacks of ordinary shares	(176,496)	(224,420)
Dividends paid on ordinary shares	(43,847)	(805)
Distributions to non-controlling interests	(3,008)	(3,257)
Contributions from non-controlling interests	7,001	0
Deposit liabilities	(17,270)	(38,704)
Net cash provided by (used in) financing activities	(232,310)	(263,938)
Effects of exchange rate changes on foreign currency cash	7,177	(24,304)
Increase (decrease) in cash and cash equivalents	675,215	(145,091)
Cash and cash equivalents beginning of year	1,800,832	2,618,378
Cash and cash equivalents end of year	$ 2,476,047	$ 2,473,287