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Schedule IV - Reinsurance
 12 Months Ended
Dec. 31, 2020
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Abstract]  
Schedule IV - Reinsurance
($ thousands)Direct AmountAssumed from Other CompaniesCeded to Other CompaniesNet Amount% of Amount Assumed to Net
2020     
Premiums earned:     
Accident and health insurance$13 — 13 — — 
Property and liability insurance3,108,674 25,010 451,870 2,681,814 1 %
Total premiums earned3,108,687 25,010 451,883 2,681,814 1 %
2019     
Premiums earned:     
Accident and health insurance$17 — 17 — — 
Property and liability insurance2,993,140 24,399 420,368 2,597,171 1 %
Total premiums earned2,993,157 24,399 420,385 2,597,171 1 %
2018     
Premiums earned:     
Accident and health insurance$19 — 19 — — 
Property and liability insurance2,808,745 25,831 398,347 2,436,229 1 %
Total premiums earned2,808,764 25,831 398,366 2,436,229 1 %

See accompanying Report of Independent Registered Public Accounting Firm in Item 8. "Financial Statements and Supplementary Data." of this Form 10-K.