UNAUDITED CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Revenues:
Net premiums earned	$ 2,516,917	$ 2,532,212	$ 5,039,708	$ 4,886,822
Net investment income	208,674	215,388	409,206	421,274
Realized investment gains (losses):
Total net realized gains (losses) on investments, and net unrealized gains (losses) on investments, trading	56,628	104,617	93,914	197,367
Net realized and unrealized gains (losses) on derivative instruments	(906)	906	(7,975)	(2,716)
Income (loss) from investment fund affiliates	30,818	13,179	69,079	8,600
Fee income and other	10,225	10,862	23,886	19,124
Total revenues	2,787,760	2,647,422	5,543,121	5,064,649
Expenses:
Net losses and loss expenses incurred	1,529,083	1,632,386	3,112,539	3,014,871
Claims and policy benefits	7,595	5,482	14,886	10,419
Acquisition costs	433,584	420,520	869,453	823,787
Operating expenses	472,778	522,521	940,816	1,037,902
Foreign exchange (gains) losses	(5,643)	(19,100)	(8,979)	(52,919)
Interest expense	54,018	55,738	104,729	108,041
Total expenses	2,491,415	2,617,547	5,033,444	4,942,101
Income (loss) before income tax and income (loss) from operating affiliates	296,345	29,875	509,677	122,548
Income (loss) from operating affiliates	42,704	21,418	56,313	34,068
Provision (benefit) for income tax	29,006	2,467	42,098	24,762
Net income (loss)	310,043	48,826	523,892	131,854
Non-controlling interests	8,423	5,044	69,429	66,187
Net income (loss) attributable to common shareholders	$ 301,620	$ 43,782	$ 454,463	$ 65,667
Weighted average common shares outstanding - basic (in thousands of shares)	260,990	281,793	263,327	286,881
Weighted average common shares outstanding - diluted (in thousands of shares)	264,943	285,082	267,279	290,929
Earnings (loss) per common share and common share equivalent - basic (in dollars per share)	$ 1.16	$ 0.16	$ 1.73	$ 0.23
Earnings (loss) per common share and common share equivalent - diluted (in dollars per share)	$ 1.14	$ 0.15	$ 1.70	$ 0.23
Excluding Life Funds Withheld Assets
Revenues:
Net investment income	$ 177,235	$ 176,242	$ 344,403	$ 340,568
Realized investment gains (losses):
Net realized gains (losses) on investments sold	50,379	51,990	61,471	63,154
Other-than-temporary impairments on investments	(1,160)	(32,778)	(8,034)	(52,360)
Other-than-temporary impairments on investments transferred to (from) other comprehensive income	(50)	256	(50)	258
Life Funds Withheld Assets
Revenues:
Net investment income	31,439	39,146	64,803	80,706
Realized investment gains (losses):
Net realized gains (losses) on investments sold	29,778	30,114	64,252	64,530
Other-than-temporary impairments on investments	0	(252)	0	(2,598)
Net unrealized gains (losses) on investments, trading securities	(22,319)	55,287	(23,725)	124,383
Net realized and unrealized gains (losses) on derivative instruments	$ (34,596)	$ (229,742)	$ (84,697)	$ (465,822)