Valuation and Qualifying Accounts

12 Months Ended

Dec. 31, 2017

Valuation And Qualifying Accounts [Abstract]

Valuation and Qualifying Accounts

SCHEDULE V

THE NAVIGATORS GROUP, INC. AND SUBSIDIARIES

Valuation and Qualifying Accounts

	Balance at		Charged (Credited) to			Charged to		Deductions		Balance at
amounts in thousands	January 1		Costs and Expenses			Other Accounts		(Describe)		December 31
Year ended December 31, 2017
Allowance for Uncollectable Reinsurance	$	12,078	$	519		$	—	$	—	$	12,597
Valuation Allowance in Deferred Taxes	$	699	$	1,099		$	—	$	—	$	1,798
Year ended December 31, 2016
Allowance for Uncollectable Reinsurance	$	6,921	$	5,157		$	—	$	—	$	12,078
Valuation Allowance in Deferred Taxes	$	721	$	(22	)	$	—	$	—	$	699
Year ended December 31, 2015
Allowance for Uncollectable Reinsurance	$	11,332	$	(4,411	)	$	—	$	—	$	6,921
Valuation Allowance in Deferred Taxes	$	776	$	(55	)	$	—	$	—	$	721