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Investments (Amortized Cost And Fair Value Of Debt Securities, By Contractual Maturity) (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	$ 525,528	$ 548,333
Fair Value	458,276	$ 486,836
Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Due after one year through five years, Amortized cost	44,354
Due after five years through ten years, Amortized cost	117,050
Due after ten years, Amortized cost	110,258
Amortized cost	271,662
Due after one year through five years, Fair value	38,583
Due after five years through ten years, Fair value	97,821
Due after ten years, Fair value	86,437
Fair Value	222,841
Mortgage And Asset-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Mortgage-backed securities, Amortized cost	253,866
Mortgage-backed securities, Fair value	$ 235,435

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Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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