v3.25.2
Investments (Narrative) (Details)
$ in Thousands
6 Months Ended
Jun. 30, 2025
USD ($)
security
item
Dec. 31, 2024
USD ($)
security
Jun. 30, 2024
USD ($)
Schedule of Available-for-sale Securities [Line Items]      
Fair value $ 481,259 $ 508,604  
Number of investments in a single issuer exceeds 10% of shareholders' equity | item 0    
Percent of shareholders equity benchmark for investments in a single issuer 10.00%    
Number of debt securities | security 518 538  
Fair Value $ 453,916 $ 476,913  
Unrealized Losses 37,148 45,710 $ 8,600
Public Funds And Trust Deposits [Member]      
Schedule of Available-for-sale Securities [Line Items]      
Fair value $ 361,500 $ 151,700