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Schedule IV - Reinsurance
12 Months Ended
Dec. 31, 2020
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 WrittenPremiums Ceded to Other CompaniesPremiums Assumed from Other CompaniesNet Premiums WrittenPercentage of Premiums Assumed to Net
Years Ended December 31,
2020$1,411,558 $755,871 $45,305 $700,992 6.5 %
20191,278,504 633,275 101,764 746,993 13.6 %
20181,148,190 512,270 104,211 740,131 14.1 %