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Investment Securities (Investment Securities Pledged To Secure Borrowings And Public Deposits) (Details)
$ in Thousands
Jun. 30, 2024
USD ($)
Investments, Debt and Equity Securities [Abstract]  
To state and local government to secure public deposits, amortized cost $ 1,912,250
To secure repurchased agreements, amortized cost 320,289
Other securities pledged, amortized cost 3,534,750
Total pledged securities, amortized cost 5,767,289
To state and local governments to secure public deposits, fair value 1,727,324
To secure repurchase agreements, fair value 291,554
Other securities pledged, fair value 3,249,558
Total pledged securities, fair value $ 5,268,436