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Third-Party Reinsurance (Tables)
9 Months Ended
Sep. 30, 2022
Reinsurance Disclosures [Abstract]  
Effects of Reinsurance
The following table summarizes the effects of reinsurance on written and earned premiums and on losses and LAE for Ark for the three and nine months ended September 30, 2022 and 2021:
Three Months Ended September 30,Nine Months Ended September 30,
Millions2022202120222021
Written premiums:
Gross$215.5 $162.4 $1,252.5 $895.0 
Ceded(22.9)(41.5)(246.0)(169.5)
Net written premiums$192.6 $120.9 $1,006.5 $725.5 
Earned premiums:
Gross$454.9 $284.5 $966.6 $622.0 
Ceded(108.8)(71.1)(208.8)(186.2)
Net earned premiums$346.1 $213.4 $757.8 $435.8 
Losses and loss adjustment expenses:
Gross$391.4 $193.5 $712.9 $372.7 
Ceded(177.7)(64.3)(256.7)(124.9)
Net losses and loss adjustment expenses$213.7 $129.2 $456.2 $247.8 
The following table provides a listing of Ark’s remaining gross and net reinsurance recoverables, excluding amounts attributable to TPC Providers, by the reinsurer’s A.M. Best Company, Inc (“A.M. Best”) rating and the percentage of total recoverables as of September 30, 2022:

$ in MillionsAs of September 30, 2022
A.M. Best Rating(1)
Gross CollateralNet % of Total
A+ or better$178.3 $— $178.3 67.7 %
A- to A78.9— 78.929.9 
B++ or lower and not rated125.7119.46.3 2.4 
Total$382.9 $119.4 $263.5 100.0 %
(1) A.M. Best ratings as detailed above are: “A+ or better” (Superior) “A- to A” (Excellent), “B++” (Good).