Derivatives (Summary Of Types Of Derivatives And Gains (Losses) Recorded) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Gain (Losses)	$ (2,833)	$ (1,761)
Asset Derivatives	114,763		$ 38,085
Derivative Liability	312,489		261,091
Interest rate contracts
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Assets Gross Amounts Offsetting the Balance Sheets	0
Asset Derivatives	114,347
Derivative Asset, Subject to Master Netting Arrangement, Collateral, Obligation to Return Security Not Offset	9,623
Derivative Asset, Subject to Master Netting Arrangement, Collateral, Obligation to Return Cash Not Offset	98,026
Derivative Asset, Subject to Master Netting Arrangement, before Offset of Collateral	6,698
Derivative Liability, Gross Amounts Offset in Balance Sheets	0
Derivative Liability	310,985
Derivative Liability, Subject to Master Netting Arrangement, Collateral, Right to Reclaim Security Not Offset	9,623
Derivative Liability, Subject to Master Netting Arrangement, Collateral, Right to Reclaim Cash Not Offset	0
Derivative Liability, Subject to Master Netting Arrangement, before Offset of Collateral	301,362
Interest rate contracts | Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative assets, gross amounts of recognized assets	114,347
Derivative Liability, Subject to Master Netting Arrangement, before Offset	310,985
Foreign currency derivatives
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Gain (Losses)	$ 42	$ 30
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Noninterest Income, Other Operating Income	Noninterest Income, Other Operating Income
Asset Derivatives	$ 326		457
Derivative Liability	182		355
Interest rate lock commitments
Derivative Instruments, Gain (Loss) [Line Items]
Asset Derivatives	16
Derivative Liability			137
Interest rate lock commitments | Interest rate contracts
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Gain (Losses)	$ 153	$ 105
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Noninterest Income, Other Operating Income	Noninterest Income, Other Operating Income
Asset Derivatives	$ 16		0
Derivative Liability	0		137
Future | Interest rate contracts
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Gain (Losses)	$ (4,271)	$ 2,650
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Noninterest Income, Other Operating Income	Noninterest Income, Other Operating Income
Asset Derivatives	$ 0		3,745
Derivative Liability	1,134		0
Interest rate forward sales commitments
Derivative Instruments, Gain (Loss) [Line Items]
Asset Derivatives	74		9
Derivative Liability	188		535
Interest rate forward sales commitments | Interest rate contracts
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Gain (Losses)	$ 46	$ (1,003)
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Residential mortgage banking revenue, net	Residential mortgage banking revenue, net
Asset Derivatives	$ 74		9
Derivative Liability	188		535
Interest rate swaps
Derivative Instruments, Gain (Loss) [Line Items]
Asset Derivatives	114,347		33,874
Derivative Liability	310,985		260,064
Interest rate swaps | Interest rate contracts
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Gain (Losses)	$ 1,197	$ (3,543)
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Noninterest Income, Other Operating Income	Noninterest Income, Other Operating Income
Asset Derivatives	$ 114,347		33,874
Derivative Liability	$ 310,985		$ 260,064