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Investments (Amortized Cost And Fair Value Of Debt Securities, By Contractual Maturity) (Details) - USD ($)
$ in Thousands
Sep. 30, 2024
Dec. 31, 2023
Schedule of Available-for-sale Securities [Line Items]    
Amortized cost $ 503,173 $ 521,919
Fair Value 466,485 $ 472,503
Debt Securities [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Due after one year through five years, Amortized cost 84,976  
Due after five years through ten years, Amortized cost 79,998  
Due after ten years, Amortized cost 102,469  
Amortized cost 267,443  
Due after one year through five years, Fair value 78,189  
Due after five years through ten years, Fair value 72,194  
Due after ten years, Fair value 89,348  
Fair Value 239,731  
Mortgage And Asset-Backed Securities [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Mortgage-backed securities, Amortized cost 235,730  
Mortgage-backed securities, Fair value $ 226,754