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Investments (Amortized Cost And Fair Value Of Debt Securities, By Contractual Maturity) (Details) - USD ($) $ in Thousands | Jun. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized cost | $ 496,757 | $ 548,333
Fair Value | 439,471 | $ 486,836
Debt Securities [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Due after one year through five years, Amortized cost | 31,288 |
Due after five years through ten years, Amortized cost | 123,670 |
Due after ten years, Amortized cost | 117,195 |
Amortized cost | 272,153 |
Due after one year through five years, Fair value | 27,477 |
Due after five years through ten years, Fair value | 106,461 |
Due after ten years, Fair value | 97,940 |
Fair Value | 231,878 |
Mortgage And Asset-Backed Securities [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Mortgage-backed securities, Amortized cost | 224,604 |
Mortgage-backed securities, Fair value | $ 207,593 |

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