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Schedule IV - Reinsurance
12 Months Ended
Dec. 31, 2019
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Abstract]  
Supplemental Schedule of Reinsurance Premiums for Insurance Companies
SCHEDULE IV. REINSURANCE
 
Property and Casualty Insurance
 
Direct Premium Written
 
Premiums Ceded to Other Companies
 
Premiums Assumed from Other Companies
 
Net Premiums Written
 
Percentage of Premiums Assumed to Net
Years Ended December 31,
 
 
 
 
 
 
 
 
 
2019
$
1,278,504

 
$
633,275

 
$
101,764

 
$
746,993

 
13.6
%
2018
1,148,190

 
512,270

 
104,211

 
740,131

 
14.1
%
2017
989,525

 
447,329

 
51,323

 
593,519

 
8.6
%