Consolidated Statements Of Operations - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Revenues
Gross premiums written	$ 1,159,652	$ 922,090
Net premiums written	663,044	544,136
Increase in unearned premiums	(222,762)	(178,091)
Net premiums earned	440,282	366,045
Net investment income	56,476	54,325
Net foreign exchange gains	3,757	8,165
Equity in earnings (losses) of other ventures	857	(1,507)
Other (loss) income	(1,242)	1,665
Net realized and unrealized (losses) gains on investments	(82,144)	43,373
Total revenues	417,986	472,066
Expenses
Net claims and claim expenses incurred	171,703	193,081
Acquisition expenses	97,711	83,282
Operational expenses	41,272	47,283
Corporate expenses	6,733	5,286
Interest expense	11,767	10,526
Total expenses	329,186	339,458
Income before taxes	88,800	132,608
Income tax benefit (expense)	3,407	(334)
Net income	92,207	132,274
Net income attributable to redeemable noncontrolling interests	(29,899)	(34,327)
Net income attributable to RenaissanceRe	62,308	97,947
Dividends on preference shares	(5,595)	(5,595)
Net income available to RenaissanceRe common shareholders	$ 56,713	$ 92,352
Net income available to RenaissanceRe common shareholders per common share – basic (in dollars per share)	$ 1.42	$ 2.26
Net income available to RenaissanceRe common shareholders per common share – diluted (in dollars per share)	1.42	2.25
Dividends declared per common share (in dollars per share)	$ 0.33	$ 0.32