Derivative Instruments (Schedule Of Fair Values Of Derivative Instruments) (Details) - USD ($) $ in Thousands		Mar. 31, 2023	Dec. 31, 2022
Derivatives, Fair Value [Line Items]
Derivative Asset	[1]	$ 100,157	$ 60,492
Derivative Liabilities	[1]	(43,068)	(54,984)
Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset		68,495	33,371
Derivative Liabilities		0	0
Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset		31,662	27,121
Derivative Liabilities		(43,068)	(54,984)
Interest rate swaps | Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset		28,960	23,894
Derivative Liabilities		(40,352)	(51,742)
Interest Rate Floor [Member] | Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset		68,495	33,371
Derivative Liabilities		0	0
Interest rate caps | Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset		2,222	2,705
Derivative Liabilities		(2,222)	(2,705)
Credit risk participation agreements | Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset		44	34
Derivative Liabilities		(148)	(119)
Foreign exchange contracts | Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset		359	488
Derivative Liabilities		(310)	(418)
Mortgage loan commitments | Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset		77	0
Derivative Liabilities		0	0
Mortgage loan forward sale contracts | Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset		0	0
Derivative Liabilities		(1)	0
Forward TBA contracts | Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset		0	0
Derivative Liabilities		$ (35)	$ 0

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