Schedule III - Supplementary Insurance Information

12 Months Ended

Dec. 31, 2017

Supplementary Insurance Information [Abstract]

Schedule III - Supplementary Insurance Information

Schedule III

W. R. Berkley Corporation and Subsidiaries

Supplementary Insurance Information

December 31, 2017, 2016 and 2015

(In thousands)	Deferred Policy Acquisition Cost		Reserve for Losses and Loss Expenses		Unearned Premiums		Net Premiums Earned		Net Investment Income		Loss and Loss Expenses		Amortization of Deferred Policy Acquisition Cost		Other Operating Costs and Expenses		Net Premiums Written
December 31, 2017
Insurance	$	435,967	$	9,820,258	$	3,039,343	$	5,706,443	$	436,178	$	3,516,996	$	929,793	$	1,026,545	$	5,715,871
Reinsurance	71,582		1,850,150		250,837		604,976		91,146		485,352		181,696		44,349		544,637
Corporate and adjustments	—		—		—		—		48,464		—		—		254,549		—
Total	$	507,549	$	11,670,408	$	3,290,180	$	6,311,419	$	575,788	$	4,002,348	$	1,111,489	$	1,325,443	$	6,260,508
December 31, 2016
Insurance	$	442,317	$	9,445,210	$	2,975,060	$	5,618,842	$	431,489	$	3,430,139	$	964,064	$	954,858	$	5,743,620
Reinsurance	95,573		1,751,985		308,240		674,506		102,617		415,661		191,890		71,305		680,293
Corporate and adjustments	—		—		—		—		30,057		—		—		213,502		—
Total	$	537,890	$	11,197,195	$	3,283,300	$	6,293,348	$	564,163	$	3,845,800	$	1,155,954	$	1,239,665	$	6,423,913
December 31, 2015
Insurance	$	426,036	$	8,857,342	$	2,834,691	$	5,393,166	$	386,801	$	3,279,219	$	918,901	$	927,095	$	5,555,437
Reinsurance	87,092		1,811,808		302,442		647,443		97,882		377,051		183,591		64,477		634,078
Corporate and adjustments	—		—		—		—		27,962		—		—		195,686		—
Total	$	513,128	$	10,669,150	$	3,137,133	$	6,040,609	$	512,645	$	3,656,270	$	1,102,492	$	1,187,258	$	6,189,515

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See Report of Independent Registered Public Accounting Firm.