Loans And Allowance For Credit Losses (Summary Classification Of Held To Maturity Loan Portfolio) (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Loans And Allowance For Loan Losses [Line Items]
Total loans	$ 17,205,479	$ 16,303,131
Business [Member]
Loans And Allowance For Loan Losses [Line Items]
Total loans	6,019,036	5,661,725
Real Estate - Construction And Land [Member]
Loans And Allowance For Loan Losses [Line Items]
Total loans	1,446,764	1,361,095
Real Estate - Business [Member]
Loans And Allowance For Loan Losses [Line Items]
Total loans	3,719,306	3,406,981
Real Estate - Personal [Member]
Loans And Allowance For Loan Losses [Line Items]
Total loans	3,026,041	2,918,078
Consumer [Member]
Loans And Allowance For Loan Losses [Line Items]
Total loans	2,077,723	2,059,088
Revolving Home Equity [Member]
Loans And Allowance For Loan Losses [Line Items]
Total loans	319,894	297,207
Consumer Credit Card [Member]
Loans And Allowance For Loan Losses [Line Items]
Total loans	589,913	584,000
Overdrafts [Member]
Loans And Allowance For Loan Losses [Line Items]
Total loans	$ 6,802	$ 14,957