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Investments (Amortized Cost And Fair Value Of Debt Securities, By Contractual Maturity) (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	$ 512,740	$ 521,919
Fair Value	462,951	$ 472,503
Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Due after one year through five years, Amortized cost	78,032
Due after five years through ten years, Amortized cost	87,037
Due after ten years, Amortized cost	105,605
Amortized cost	270,674
Due after one year through five years, Fair value	69,240
Due after five years through ten years, Fair value	75,338
Due after ten years, Fair value	89,440
Fair Value	234,018
Mortgage And Asset-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Mortgage-backed securities, Amortized cost	242,066
Mortgage-backed securities, Fair value	$ 228,933

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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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