Segment Reporting (Tables)

3 Months Ended

Mar. 31, 2018

Segment Reporting, Measurement Disclosures [Abstract]

Schedule Of Significant Components Of The Company's Revenues And Expenses By Segment

A summary of the significant components of the Company’s revenues and expenses by segment is as follows:

Three months ended March 31, 2018	Property			Casualty and Specialty			Other			Total
Gross premiums written	$	706,968		$	452,684		$	—		$	1,159,652
Net premiums written	$	354,077		$	308,967		$	—		$	663,044
Net premiums earned	$	225,049		$	215,233		$	—		$	440,282
Net claims and claim expenses incurred	30,607			141,078			18			171,703
Acquisition expenses	40,721			56,990			—			97,711
Operational expenses	26,546			14,593			133			41,272
Underwriting income (loss)	$	127,175		$	2,572		$	(151	)	129,596
Net investment income							56,476			56,476
Net foreign exchange gains							3,757			3,757
Equity in earnings of other ventures							857			857
Other loss							(1,242		)	(1,242		)
Net realized and unrealized losses on investments							(82,144		)	(82,144		)
Corporate expenses							(6,733		)	(6,733		)
Interest expense							(11,767		)	(11,767		)
Income before taxes										88,800
Income tax benefit							3,407			3,407
Net income attributable to redeemable noncontrolling interests							(29,899		)	(29,899		)
Dividends on preference shares							(5,595		)	(5,595		)
Net income available to RenaissanceRe common shareholders										$	56,713
Net claims and claim expenses incurred – current accident year	$	58,169		$	144,869		$	—		$	203,038
Net claims and claim expenses incurred – prior accident years	(27,562		)	(3,791		)	18			(31,335		)
Net claims and claim expenses incurred – total	$	30,607		$	141,078		$	18		$	171,703
Net claims and claim expense ratio – current accident year	25.8		%	67.3		%				46.1		%
Net claims and claim expense ratio – prior accident years	(12.2		)%	(1.8		)%				(7.1		)%
Net claims and claim expense ratio – calendar year	13.6		%	65.5		%				39.0		%
Underwriting expense ratio	29.9		%	33.3		%				31.6		%
Combined ratio	43.5		%	98.8		%				70.6		%

Three months ended March 31, 2017	Property			Casualty and Specialty			Other			Total
Gross premiums written	$	520,529		$	401,561		$	—		$	922,090
Net premiums written	$	289,871		$	254,265		$	—		$	544,136
Net premiums earned	$	186,988		$	179,059		$	(2	)	$	366,045
Net claims and claim expenses incurred	38,838			154,571			(328		)	193,081
Acquisition expenses	29,103			54,179			—			83,282
Operational expenses	27,665			19,607			11			47,283
Underwriting income (loss)	$	91,382		$	(49,298	)	$	315		42,399
Net investment income							54,325			54,325
Net foreign exchange gains							8,165			8,165
Equity in losses of other ventures							(1,507		)	(1,507		)
Other income							1,665			1,665
Net realized and unrealized gains on investments							43,373			43,373
Corporate expenses							(5,286		)	(5,286		)
Interest expense							(10,526		)	(10,526		)
Income before taxes and noncontrolling interests										132,608
Income tax expense							(334		)	(334		)
Net income attributable to noncontrolling interests							(34,327		)	(34,327		)
Dividends on preference shares							(5,595		)	(5,595		)
Net income available to RenaissanceRe common shareholders										$	92,352
Net claims and claim expenses incurred – current accident year	$	39,766		$	124,309		$	—		$	164,075
Net claims and claim expenses incurred – prior accident years	(928		)	30,262			(328		)	29,006
Net claims and claim expenses incurred – total	$	38,838		$	154,571		$	(328	)	$	193,081
Net claims and claim expense ratio – current accident year	21.3		%	69.4		%				44.8		%
Net claims and claim expense ratio – prior accident years	(0.5		)%	16.9		%				7.9		%
Net claims and claim expense ratio – calendar year	20.8		%	86.3		%				52.7		%
Underwriting expense ratio	30.3		%	41.2		%				35.7		%
Combined ratio	51.1		%	127.5		%				88.4		%