Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Revenues
Gross premiums written	$ 977,343	$ 827,415	$ 2,136,995	$ 1,749,505
Net premiums written	604,509	555,745	1,267,553	1,099,881
Increase in unearned premiums	(175,124)	(173,480)	(397,886)	(351,571)
Net premiums earned	429,385	382,265	869,667	748,310
Net investment income	71,356	54,163	127,832	108,488
Net foreign exchange (losses) gains	(10,687)	3,109	(6,930)	11,274
Equity in earnings of other ventures	5,826	5,543	6,683	4,036
Other income (loss)	1,225	2,392	(17)	4,057
Net realized and unrealized (losses) gains on investments	(17,901)	58,113	(100,045)	101,486
Total revenues	479,204	505,585	897,190	977,651
Expenses
Net claims and claim expenses incurred	60,167	142,587	231,870	335,668
Acquisition expenses	105,052	88,251	202,763	171,533
Operational expenses	37,543	41,766	78,815	89,049
Corporate expenses	8,301	4,636	15,034	9,922
Interest expense	11,768	10,091	23,535	20,617
Total expenses	222,831	287,331	552,017	626,789
Income before taxes	256,373	218,254	345,173	350,862
Income tax expense	(4,506)	(3,904)	(1,099)	(4,238)
Net income	251,867	214,350	344,074	346,624
Net income attributable to redeemable noncontrolling interests	(54,483)	(37,612)	(84,382)	(71,939)
Net income attributable to RenaissanceRe	197,384	176,738	259,692	274,685
Dividends on preference shares	(5,596)	(5,596)	(11,191)	(11,191)
Net income available to RenaissanceRe common shareholders	$ 191,788	$ 171,142	$ 248,501	$ 263,494
Net income available to RenaissanceRe common shareholders per common share – basic (in dollars per share)	$ 4.78	$ 4.25	$ 6.21	$ 6.50
Net income available to RenaissanceRe common shareholders per common share – diluted (in dollars per share)	4.78	4.24	6.21	6.47
Dividends declared per common share (in dollars per share)	$ 0.33	$ 0.32	$ 0.66	$ 0.64