Derivative Instruments (Schedule Of Notional Amounts Of Derivative Instruments) (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Derivative [Line Items]
Derivative, Notional Amount	$ 5,194,716	$ 3,742,521
Interest Rate Swaps [Member]
Derivative [Line Items]
Derivative, Notional Amount	2,166,393	1,981,821
Interest Rate Floor [Member]
Derivative [Line Items]
Derivative, Notional Amount	2,000,000	1,000,000
Interest Rate Caps [Member]
Derivative [Line Items]
Derivative, Notional Amount	336,682	152,784
Credit Risk Participation Agreements [Member]
Derivative [Line Items]
Derivative, Notional Amount	653,887	579,925
Foreign Exchange Contracts [Member]
Derivative [Line Items]
Derivative, Notional Amount	30,401	27,991
Mortgage Loan Commitments [Member]
Derivative [Line Items]
Derivative, Notional Amount	3,004	0
Mortgage Loan Forward Sale Contracts [Member]
Derivative [Line Items]
Derivative, Notional Amount	1,349	0
Forward Contracts [Member]
Derivative [Line Items]
Derivative, Notional Amount	$ 3,000	$ 0