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Credit Losses (Details) - USD ($) $ in Thousands | 9 Months Ended |  |
--- | --- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Dec. 31, 2020 | Dec. 31, 2019
Credit Loss Allowance Activity |  |  |  |
Premium Receivable, Allowance for Credit Loss | $ 25 | $ 132 | $ 140 | $ 165
Reinsurance Recoverable, Allowance for Credit Loss | 768 | 368 | 386 | 256
Financing Receivable, Allowance for Credit Loss | 0 | 51 | 20 | 141
Total Credit Loss Allowances | 793 | 551 | $ 546 | $ 562
Premium Receivable, Credit Loss Expense (Reversal) | (176) | (235) |  |
Reinsurance Recoverable, Credit Loss Expense (Reversal) | 382 | 112 |  |
Financing Receivable, Credit Loss, Expense (Reversal) | (20) | (90) |  |
Total Credit Loss Allowance Expenses | 186 | (213) |  |
Premium Receivable, Allowance for Credit Loss, Writeoff | 61 | 202 |  |
Reinsurance recoverable, allowance for credit loss, writeoff | 0 | 0 |  |
Financing Receivable, Allowance for Credit Loss, Writeoff | 0 | 0 |  |
Total Credit Loss Allowance Writeoffs | $ 61 | $ 202 |  |

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