Derivative Instruments (Schedule Of Fair Values Of Derivative Instruments) (Details) - USD ($) $ in Thousands		Mar. 31, 2024	Dec. 31, 2023
Derivatives, Fair Value [Line Items]
Derivative Asset	[1]	$ 94,758	$ 116,876
Derivative Liabilities	[1]	(38,546)	(37,899)
Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset		56,094	78,960
Derivative Liabilities		0	0
Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset		38,664	37,916
Derivative Liabilities		(38,546)	(37,899)
Interest rate swaps | Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset		37,290	35,816
Derivative Liabilities		(37,290)	(35,816)
Interest Rate Floor [Member] | Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset		56,094	78,960
Derivative Liabilities		0	0
Interest rate caps | Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset		864	1,391
Derivative Liabilities		(864)	(1,391)
Credit risk participation agreements | Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset		39	77
Derivative Liabilities		(106)	(194)
Foreign exchange contracts | Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset		368	534
Derivative Liabilities		(275)	(479)
Mortgage loan commitments | Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset		102	89
Derivative Liabilities		0	(1)
Mortgage loan forward sale contracts | Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset		0	8
Derivative Liabilities		0	0
Forward TBA contracts | Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset		1	1
Derivative Liabilities		$ (11)	$ (18)

[1] * The fair value of each class of derivative is shown in Note 11.