UNAUDITED CONSOLIDATED STATEMENTS OF INCOME (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Revenues:
Net premiums earned	$ 1,625,312	$ 1,548,041	$ 4,717,396	$ 4,471,051
Net investment income	237,921	239,481	716,935	767,354
Realized investment gains (losses):
Net realized gains (losses) on investments sold	1,229	7,136	85,733	64,703
Other-than-temporary impairments on investments	(2,388)	(10,295)	(7,676)	(45,027)
Other-than-temporary impairments on investments transferred to (from) other comprehensive income	(799)	(2,334)	(2,538)	(16,760)
Net realized gains (losses) on investments	(1,958)	(5,493)	75,519	2,916
Net realized and unrealized gains (losses) on derivative instruments	880	6,254	3,660	2,656
Income (loss) from investment fund affiliates	5,079	16,049	83,843	38,555
Fee income and other	10,875	13,306	31,378	36,378
Total revenues	1,878,109	1,817,638	5,628,731	5,318,910
Expenses:
Net losses and loss expenses incurred	1,006,520	894,077	2,787,210	2,574,497
Claims and policy benefits	116,549	119,438	344,269	371,893
Acquisition costs	238,328	236,347	690,473	679,434
Operating expenses	311,506	305,745	898,497	887,210
Exchange (gains) losses	20,303	18,690	(24,463)	13,432
Interest expense	37,926	37,907	114,830	134,564
Total expenses	1,731,132	1,612,204	4,810,816	4,661,030
Income (loss) before income tax and income (loss) from operating affiliates	146,977	205,434	817,915	657,880
Income (loss) from operating affiliates	24,590	2,763	88,413	39,473
Provision (benefit) for income tax	897	451	73,248	51,813
Net income (loss)	170,670	207,746	833,080	645,540
Non-controlling interests	35,022	35,844	73,944	75,856
Net income (loss) attributable to ordinary shareholders	$ 135,648	$ 171,902	$ 759,136	$ 569,684
Weighted average ordinary shares and ordinary share equivalents outstanding - basic (in shares)	285,393	304,199	289,957	309,675
Weighted average ordinary shares and ordinary share equivalents outstanding - diluted (in shares)	290,490	307,764	294,828	312,602
Earnings (loss) per ordinary share and ordinary share equivalent - basic (in dollars per share)	$ 0.48	$ 0.57	$ 2.62	$ 1.84
Earnings (loss) per ordinary share and ordinary share equivalent - diluted (in dollars per share)	$ 0.47	$ 0.56	$ 2.57	$ 1.82