Schedule IV - Reinsurance

12 Months Ended

Dec. 31, 2016

Supplemental Schedule of Reinsurance Premiums for Insurance Companies [Abstract]

Schedule IV - Reinsurance

Schedule IV

W. R. Berkley Corporation and Subsidiaries

Reinsurance

Years ended December 31, 2016, 2015 and 2014

	Premiums Written
(In thousands, other than percentages)	Direct Amount		Ceded to Other Companies		Assumed from Other Companies		Net Amount		Percentage of Amount Assumed to Net
Year ended December 31, 2016:
Insurance	$	6,634,540	$	1,059,149	$	200,522	$	5,775,913	3.5	%
Reinsurance	13,060		60,639		695,579		648,000		107.3	%
Total	$	6,647,600	$	1,119,788	$	896,101	$	6,423,913	13.9	%
Year ended December 31, 2015:
Insurance	$	6,395,806	$	1,016,095	$	211,686	$	5,591,397	3.8	%
Reinsurance	16,727		44,383		625,774		598,118		104.6	%
Total	$	6,412,533	$	1,060,478	$	837,460	$	6,189,515	13.5	%
Year ended December 31, 2014:
Insurance	$	6,142,648	$	1,022,287	$	225,302	$	5,345,663	4.2	%
Reinsurance	42,594		43,604		652,294		651,284		100.2	%
Total	$	6,185,242	$	1,065,891	$	877,596	$	5,996,947	14.6	%

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See accompanying Report of Independent Registered Public Accounting Firm.