Commitments, Contingencies And Guarantees (Schedule Of Off-Balance Sheet Instruments Commitments) (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Commercial letters of credit	$ 2,571	$ 4,393
Credit Card [Member]
Commitments to extend credit	5,367,102	5,190,942
Other [Member]
Commitments to extend credit	9,144,971	9,102,525
Financial Standby Letter of Credit [Member]
Standby letters of credit, net of conveyances to others	$ 590,551	$ 555,858