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Summary Of Significant Accounting Policies (Narrative) (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Summary Of Significant Accounting Policies [Abstract]        
Maximum exposure to loss related to investment $ 1.2   $ 1.2  
Investments $ 1.2   $ 1.2  
Anti-dilutive securities 0 0 0 0