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Investment Securities (Investment Securities Pledged To Secure Borrowings And Public Deposits) (Details)
$ in Thousands
Jun. 30, 2021
USD ($)
Investments, Debt and Equity Securities [Abstract]  
To state and local governments to secure public deposits, amortized cost $ 319,811
Other securities pledged principally to secure repurchase agreements, amortized cost 693,391
Total pledged securities, amortized cost 1,013,202
To state and local governments to secure public deposits, fair value 328,578
Other securities pledged principally to secure repurchase agreements, fair value 724,146
Total pledged securities, fair value $ 1,052,724