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Summary Of Significant Accounting Policies (Schedule Of Uncollectible Reinsurance Recoverable And Premium Receivables) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020
Summary Of Significant Accounting Policies [Abstract] |  |
Reinsurance recoverable premium receivables and deductibles | $ 46,499 | $ 41,357

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