XML 70 R52.htm IDEA: XBRL DOCUMENT v3.8.0.1
Concentration of Credit Risk (Tables)
 12 Months Ended
Dec. 31, 2017
Risks and Uncertainties [Abstract]  
Schedule Of Gross Written Premium From Major Brokers
The following table shows the largest brokers that the Company transacted business within the three years ended December 31, 2017 and the proportion of gross written premiums from each of those brokers.
 
 
 
Twelve Months Ended December 31,
 
 
 
2017
 
2016
 
2015
 
 
 
(in percentages)
Aon Corporation
 
16.4
%
 
18.4
%
 
18.7
%
Marsh & McLennan Companies, Inc.
 
16.0

 
14.7

 
15.4

Willis Group Holdings, Ltd.
 
13.1

 
13.7

 
14.5

Other brokers/non-broker sources(1)
 
54.5

 
53.2

 
51.4

Total
 
100.0
%
 
100.0
%
 
100.0
%
 
 
 
 
 
 
 
Gross written premiums ($ millions)
 
$
3,360.9

 
$
3,147.0

 
$
2,997.3

 ______________
(1) 
No other individual broker accounted for more than 10% of total gross written premiums.