UNAUDITED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Cash flows provided by (used in) operating activities:
Net income (loss)	$ 833,080	$ 645,540
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Net realized (gains) losses on investments	(75,519)	(2,916)
Net realized and unrealized (gains) losses on derivative instruments	(3,660)	(2,656)
Amortization of premiums (discounts) on fixed maturities	127,524	119,819
(Income) loss from investment and operating affiliates	(172,256)	(78,028)
Share-based compensation	45,447	41,827
Depreciation	44,147	41,735
Accretion of deposit liabilities	36,779	65,585
Changes in:
Unpaid losses and loss expenses	(85,471)	(609,175)
Future policy benefit reserves	(128,281)	(132,834)
Unearned premiums	486,249	524,341
Premiums receivable	(341,520)	(380,164)
Unpaid losses and loss expenses recoverable	28,566	354,698
Ceded unearned premiums	(183,198)	(121,791)
Reinsurance balances receivable	(38,612)	(5,146)
Deferred acquisition costs	(47,859)	(47,629)
Reinsurance balances payable	338,769	413,658
Deferred tax asset - net	(3,693)	24,058
Derivatives	14,563	49,567
Other assets	(81,148)	(53,297)
Other liabilities	39,645	108,067
Other	19,337	(61,079)
Total adjustments	19,809	248,640
Net cash provided by (used in) operating activities	852,889	894,180
Cash flows provided by (used in) investing activities:
Proceeds from sale of fixed maturities and short-term investments	3,042,348	2,456,889
Proceeds from redemption of fixed maturities and short-term investments	3,142,738	3,212,626
Proceeds from sale of equity securities	95,083	212,034
Purchases of fixed maturities and short term investments	(6,480,368)	(5,874,664)
Purchases of equity securities	(358,484)	(289,553)
Investment affiliates, net	(94,760)	58,415
Other, net	83,575	(113,538)
Net cash provided by (used in) investing activities	(569,868)	(337,791)
Cash flows provided by (used in) financing activities:
Proceeds from issuance of ordinary shares and exercise of stock options	9,718	4,651
Buybacks of ordinary shares	(525,520)	(351,158)
Dividends paid on ordinary shares	(121,131)	(101,753)
Distributions to non-controlling interests	(42,026)	(43,283)
Contributions from non-controlling interests	500	1,500
Repayment of debt	0	(600,000)
Deposit liabilities	(87,788)	(114,376)
Net cash provided by (used in) financing activities	(766,247)	(1,204,419)
Effects of exchange rate changes on foreign currency cash	(4,259)	20,210
Increase (decrease) in cash and cash equivalents	(487,485)	(627,820)
Cash and cash equivalents beginning of year	2,618,378	3,825,125
Cash and cash equivalents end of year	$ 2,130,893	$ 3,197,305