Supplementary Insurance Information

12 Months Ended

Dec. 31, 2017

Supplementary Insurance Information [Abstract]

Supplementary Insurance Information

SCHEDULE III

THE NAVIGATORS GROUP, INC. AND SUBSIDIARIES

Supplementary Insurance Information

															Amortization
	Deferred						Other Policy								of Deferred
	Policy		Reserve				Claims and		Net		Net		Losses		Policy			Other		Net
	Acquisition		for Losses		Unearned		Benefits		Earned		Investment		and LAE		Acquisition			Operating		Written
amounts in thousands	Costs		and LAE		Premiums		Payable		Premiums		Income (1)		Incurred		Costs			Expenses		Premiums
Year ended December 31, 2017
U.S. Insurance	$	54,674	$	1,629,015	$	575,068	$	—	$	674,665	$	—	$	443,353	$	77,729		$	128,905	$	721,300
Int'l Insurance		38,988		716,352		260,982		—		333,792		—		229,601		68,824			83,464		335,852
GlobalRe		41,587		169,778		151,631		—		177,963		—		133,311		39,136			20,861		214,178
Corporate		—		—		—		—		—		89,293		—		(958	)		—		—
	$	135,249	$	2,515,145	$	987,681	$	—	$	1,186,420	$	89,293	$	806,265	$	184,731		$	233,230	$	1,271,330
Year ended December 31, 2016
U.S. Insurance	$	50,028	$	1,564,524	$	519,505	$	—	$	629,308	$	—	$	397,860	$	70,812		$	128,108	$	683,568
Int'l Insurance		37,385		605,105		252,442		—		307,416		—		178,284		61,703			86,395		345,967
GlobalRe		32,247		120,098		115,397		—		163,621		—		89,304		34,008			19,593		156,689
Corporate		—		—		—		—		—		79,451		—		(1,478	)		—		—
	$	119,660	$	2,289,727	$	887,344	$	—	$	1,100,345	$	79,451	$	665,448	$	165,045		$	234,096	$	1,186,224
Year ended December 31, 2015
U.S. Insurance	$	37,372	$	1,478,391	$	476,803	$	—	$	555,836	$	—	$	343,497	$	56,319		$	131,407	$	597,006
Int'l Insurance		25,451		608,783		221,544		—		259,960		—		134,702		43,676			75,867		277,942
GlobalRe		29,160		115,470		122,329		—		168,291		—		94,399		32,240			16,242		168,912
Corporate		—		—		—		—		—		68,718		—		(2,258	)		—		—
	$	91,983	$	2,202,644	$	820,676	$	—	$	984,087	$	68,718	$	572,598	$	129,977		$	223,516	$	1,043,860

(1)   As we evaluate the underwriting results of each of our reportable segments separately from the results of our investment portfolio, we do not allocate net investment income to our reportable segments.