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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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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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