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Credit Losses
9 Months Ended
Sep. 30, 2021
Credit Loss [Abstract]  
Allowance for Credit Losses ALLOWANCE FOR EXPECTED CREDIT LOSSES
We are exposed to credit losses primarily through three different pools of assets based on similar risk characteristics: premiums receivable for direct written business; reinsurance recoverables from ceded losses to our reinsurers; and our notes receivable. We estimate the expected credit losses based on historical trends, credit ratings assigned to reinsurers by rating
agencies, average default rates, current economic conditions, and reasonable and supportable forecasts of future economic conditions that affect the collectability of the reported amounts over its expected life. Changes in the relevant information may significantly affect the estimates of expected credit losses.

The allowance for credit losses is deducted from the amortized cost basis of the assets to present their net carrying value at the amount expected to be collected. Each period, the allowance for credit losses is adjusted through earnings to reflect expected credit losses over the remaining lives of the assets.

The following tables summarize our allowance for expected credit losses by pooled asset for the nine-months ended September 30, 2021 and 2020:
September 30, 2021
December 31, 2020Provision for expected credit lossesWrite-offsSeptember 30, 2021
Premiums Receivable$140 $(176)$61 $25 
Reinsurance Recoverables386 382 — 768 
Note Receivable20 (20)— — 
Total$546 $186 $61 $793 
September 30, 2020
December 31, 2019Provision for expected credit lossesWrite-offsSeptember 30, 2020
Premiums Receivable$165 $(235)$202 $132 
Reinsurance Recoverables256 112 — 368 
Note Receivable141 (90)— 51 
Total$562 $(213)$202 $551