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Debt Debt (Schedule of Unsecured Term Loans) (Details) - USD ($)
$ in Thousands
Dec. 31, 2024
Dec. 31, 2023
Private placement notes - unsecured    
Debt Instrument [Line Items]    
Amount $ 150,000 $ 225,000
November 2025    
Debt Instrument [Line Items]    
Amount $ 50,000  
Fixed Rate 4.33%  
January 2015    
Debt Instrument [Line Items]    
Amount $ 100,000  
Fixed Rate 4.51%