Investment Securities (Investment Securities, At Fair Value) (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Investments, Debt and Equity Securities [Abstract]
Debt Securities, Available-for-sale	$ 9,095,513	$ 9,136,853
Trading securities	40,080	38,034
Equity securities with readily determinable fair values	47,551	48,359
Equity Securities without Readily Determinable Fair Value, Amount	9,803	9,083	$ 6,978
Federal Reserve Bank Stock	35,918	35,545
Federal Home Loan Bank Stock	10,198	10,120
Private Equity Investments	184,343	184,386
Total investment securities	$ 9,423,406	$ 9,462,380