UNAUDITED CONSOLIDATED STATEMENTS OF INCOME (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Revenues:
Net premiums earned	$ 1,488,839	$ 1,529,691
Net investment income	233,189	246,468
Realized investment gains (losses):
Net realized gains (losses) on investments sold	22,956	41,147
Other-than-temporary impairments on investments	(2,276)	(3,727)
Other-than-temporary impairments on investments transferred to (from) other comprehensive income	(1,451)	(911)
Net realized gains (losses) on investments	19,229	36,509
Net realized and unrealized gains (losses) on derivative instruments	1,810	7,885
Income (loss) from investment fund affiliates	33,303	32,221
Fee income and other	11,454	9,632
Total revenues	1,787,824	1,862,406
Expenses:
Net losses and loss expenses incurred	831,505	843,084
Claims and policy benefits	113,587	110,953
Acquisition costs	199,414	220,259
Operating expenses	310,424	283,832
Exchange (gains) losses	10,441	(33,435)
Interest expense	42,941	38,700
Total expenses	1,508,312	1,463,393
Income (loss) before income tax and income (loss) from operating affiliates	279,512	399,013
Income (loss) from operating affiliates	46,285	30,998
Provision (benefit) for income tax	34,321	43,479
Net income (loss)	291,476	386,532
Non-controlling interests	35,759	35,742
Net income (loss) attributable to ordinary shareholders	$ 255,717	$ 350,790
Weighted average ordinary shares and ordinary share equivalents outstanding - basic (in shares)	276,337	295,000
Weighted average ordinary shares and ordinary share equivalents outstanding - diluted (in shares)	280,458	299,469
Earnings (loss) per ordinary share and ordinary share equivalent - basic (in dollars per share)	$ 0.93	$ 1.19
Earnings (loss) per ordinary share and ordinary share equivalent - diluted (in dollars per share)	$ 0.91	$ 1.17